WO2019146960A1

WO2019146960A1 - Battery pressure detection sensor and terminal including same

Info

Publication number: WO2019146960A1
Application number: PCT/KR2019/000704
Authority: WO
Inventors: 진병수; 서인용
Original assignee: 주식회사 아모그린텍
Priority date: 2018-01-24
Filing date: 2019-01-17
Publication date: 2019-08-01
Also published as: KR102175734B1; KR20190090340A

Abstract

Provided are a battery pressure detection sensor for outputting a resistance value or a capacitance corresponding to a pressure applied by the swelling of a battery, and a terminal including a battery pressure detection sensor, in which the charging of a battery is controlled on the basis of a resistance value or a capacitance output from the battery pressure detection sensor so that ignition and explosion of the battery are prevented. The provided battery pressure detection sensor comprises: an upper electrode layer including an upper electrode pattern; a lower electrode layer disposed under the upper electrode layer and including a lower electrode pattern arranged to overlap the upper electrode pattern; and an elastic layer disposed between the upper electrode layer and the lower electrode layer, wherein the elastic layer is disposed to overlap the upper electrode pattern and the lower electrode pattern.

Description

Battery pressure sensor and terminal equipped with it

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a battery pressure sensor and a terminal having the battery pressure sensor, and more particularly, The present invention relates to a battery pressure sensing sensor for sensing pressure and a terminal equipped with the same.

A battery for power supply is mounted on the portable terminal. A battery using a lithium-based battery is mounted on a portable terminal.

The swelling of the battery occurs due to the gas generated by the reaction of the compound material during the charging operation.

When the internal temperature of the portable terminal is increased in a state where battery swelling occurs, ignition or explosion may occur.

2. Description of the Related Art [0002] Recently, as the ignition and explosion of a battery mounted in a mobile terminal frequently occurs, manufacturers are studying various battery control techniques to prevent ignition, explosion, and the like of the battery.

For example, a typical method of battery control technology is a charge shutdown method according to battery temperature. The charge cutoff method measures the temperature of the battery or the internal temperature of the portable terminal through the thermistor, and stops the charging of the battery when the measured temperature is higher than the reference value.

However, even when the battery is in a normal state, the temperature frequently rises above the reference value during charging. The portable terminal to which the charge cutoff method is applied has a problem that charging time is increased due to repetition of charge and charge interruption since the normal battery is determined to be in an abnormal state.

Accordingly, the manufacturing industry is constantly studying techniques for preventing ignition and explosion of a battery while minimizing an increase in the charging time of the battery.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a battery pressure sensor which outputs a resistance value or a capacitance corresponding to a pressure applied by a swelling of a battery.

An object of the present invention is to provide a terminal equipped with a battery pressure sensing sensor for controlling ignition of a battery based on a resistance value or a capacitance output from a battery pressure sensing sensor to prevent ignition and explosion of the battery.

In order to achieve the above object, a battery pressure sensor according to an embodiment of the present invention includes an upper electrode layer having an upper electrode pattern, a lower electrode layer disposed below the upper electrode layer, And an elastic layer disposed between the electrode layer, the upper electrode layer, and the lower electrode layer, and the elastic layer is superimposed on the upper electrode pattern and the lower electrode pattern. The adhesive layer may be disposed between the upper electrode layer and the lower electrode layer to bond the upper electrode layer and the lower electrode layer. The adhesive layer may include a receiving hole for receiving the elastic layer.

According to another aspect of the present invention, there is provided a battery pressure sensor comprising: a lower electrode layer having a first electrode and a second electrode formed thereon; a first electrode disposed on the lower electrode layer, Layer and a top electrode layer disposed on top of the piezoelectric layer. In this case, the first electrode and the second electrode include a plurality of linear patterns spaced apart from each other, a linear pattern constituting a second electrode is arranged between the linear patterns constituting the first electrode, and the piezoelectric layer includes a variable resistance material And the resistance variable material may be a quantum tunneling composite (QTC).

According to an aspect of the present invention, there is provided a terminal including a battery pressure sensor according to an exemplary embodiment of the present invention. The terminal is connected to a thermistor terminal connected to a thermistor and a battery and connected to a thermistor terminal. And a central processing unit connected to the thermistor terminal and controlling the charging of the battery based on the output value of the battery pressure detection sensor. The thermistor includes an antenna, a USB charging terminal, a central processing unit Power management circuitry. At this time, the battery pressure detection sensor outputs a resistance value or a switching event as an output value. When the output value of the battery pressure detection sensor is a resistance value, the central processing unit charges the battery by varying the charging current of the battery, This switching event can block the charging of the battery.

According to another aspect of the present invention, there is provided a terminal having a battery pressure sensor according to another embodiment of the present invention. The terminal is disposed over the battery and connected to a sensor terminal. The terminal outputs an output value corresponding to a pressure applied by the swelling of the battery. An AD converter connected to the battery pressure sensor and the sensor terminal for converting the output value of the battery pressure sensor into a digital signal and a central processing unit for controlling the charging of the battery based on the output value converted into the digital signal by the AD converter . At this time, the central processing unit can charge the battery when the output value of the AD converter exceeds the preset value, or to charge the battery by changing the charging current of the battery based on the output value of the AD converter and the plurality of reference values.

According to another aspect of the present invention, there is provided a terminal having a battery pressure sensing sensor, comprising: an antenna terminal connected to an antenna; A battery pressure sensor connected to the antenna terminal and arranged to be overlapped with the battery and connected to the antenna terminal for outputting one of a resistance value, a switching event and a capacitance corresponding to the pressure applied by the swelling of the battery as an output value; And a central processing unit for controlling the charging of the battery based on the output value of the detection sensor.

In this case, the antenna terminal is one of an electronic payment antenna, a wireless power transmission antenna, and a short-range communication antenna. The battery pressure sensor is an antenna for short-range communication connected to an antenna terminal. When the resistance value exceeds the set value, the switching event can be output as the output value.

Meanwhile, the antenna terminal has a plurality of terminals connected to the plurality of antennas, and the battery pressure detection sensor is connected to terminals connected to different ones of the plurality of terminals, and the central processing unit detects the output value of the battery pressure detection sensor as a set value The charging of the battery is blocked and the charging current of the battery is varied based on the output value of the battery pressure detecting sensor and a plurality of reference values to charge the battery.

According to the present invention, a battery pressure sensor and a terminal equipped with the sensor can detect the resistance value or the capacitance C corresponding to the pressure caused by the swelling of the battery to control charging of the battery, And the blister generated when the abnormal battery is charged can be distinguished from each other.

Also, the battery pressure sensor and the terminal having the battery pressure sensor control the charging of the battery based on the output value output from the battery pressure sensor, thereby controlling the charging of the battery in accordance with the bulging information generated in the battery in an abnormal state, And explosion can be prevented.

In addition, the battery pressure sensor and the terminal having the battery pressure sensor control the charging of the battery based on the output value output from the battery pressure sensor, thereby preventing the charging of the normal battery from being blocked as compared with the conventional technology using the temperature- It is possible to prevent the battery charging time from being increased.

1 and 2 are views for explaining a battery pressure sensing sensor according to a first embodiment of the present invention.

3 and 4 are views for explaining a battery pressure sensing sensor according to a second embodiment of the present invention.

5 and 6 are views for explaining a battery pressure sensing sensor according to a third embodiment of the present invention.

7 and 8 are views for explaining a battery pressure sensing sensor according to a fourth embodiment of the present invention.

9 and 10 are views for explaining a battery pressure sensing sensor according to a fifth embodiment of the present invention.

11 is a view for explaining a terminal having a battery pressure sensing sensor according to a first embodiment of the present invention.

12 is a view for explaining a terminal having a battery pressure sensor according to a second embodiment of the present invention;

13 is a view for explaining a terminal having a battery pressure sensor according to a third embodiment of the present invention.

14 and 15 are views for explaining a terminal having a battery pressure sensing sensor according to a fourth embodiment of the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to facilitate a person skilled in the art to easily carry out the technical idea of the present invention. . In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The battery pressure sensing sensor according to the first to third embodiments of the present invention is mounted on a device having a built-in battery to sense a pressure change due to swelling of the battery. The pressure sensor is placed over the battery and outputs an output value corresponding to the pressure applied by the swelling of the battery.

The battery pressure detection sensor outputs an output value corresponding to the resistance corresponding to the pressure applied by the swelling of the battery. The battery pressure detection sensor is an example of outputting a linear resistance value as an output value. Another example is that the battery pressure detection sensor outputs a switching event which is short-circuited at a resistance value exceeding a set resistance value, as an output value.

The battery pressure detection sensor outputs an output value corresponding to the capacitor value corresponding to the pressure applied by the swelling of the battery. The battery pressure detection sensor is an example of outputting a linear capacitor value as an output value. Another example is that the battery pressure detection sensor outputs, as an output value, a switching event that is short-circuited at a capacitor value exceeding the set capacitor value.

1 and 2, a battery pressure sensing sensor 100 according to a first embodiment of the present invention includes an upper electrode layer 110, an elastic layer 120, a lower electrode layer 130, and an adhesive layer 140 do.

The upper electrode layer 110 is formed of a flexible printed circuit board having electrodes formed thereon. The upper electrode layer 110 includes an upper base sheet 111, an upper electrode pattern 113, an upper connection pattern 115, and an upper terminal pattern 117.

The upper base sheet 111 is composed of a soft thin sheet. The upper base sheet 111 is made up of a flexible thin sheet having a thickness of about 25 mu m as an example.

The upper base sheet 111 is a soft thin sheet of one of polyimide (PI), polyester, glass epoxy, and polyethylene terephthalate. In addition, the thin film sheet can be applied to a material used as a base sheet of a flexible printed circuit board.

The upper electrode pattern 113 is formed on one surface of the upper base sheet 111. The upper electrode pattern 113 is formed on one surface of the upper base sheet 111 in the direction in which the elastic layer 120 is disposed.

The upper electrode pattern 113 is formed of a thin film conductive metal having a predetermined shape. The upper electrode pattern 113 may be formed in a polygonal shape such as a circle, an ellipse, a rectangle, a triangle, or the like. The upper electrode pattern 113 is an example of one of copper (Cu), silver (Ag), nickel (Ni), and platinum (Pt). The upper electrode pattern 113 may be formed of a transparent electrode material such as ITO.

The upper electrode pattern 113 is formed of a circular thin film made of copper and formed on the lower surface of the upper base sheet 111 in the direction in which the elastic layer 120 is disposed.

The upper connection pattern 115 is formed on one surface of the upper base sheet 111. The upper connection pattern 115 is formed on the upper surface of the upper base sheet 111 and one surface of the lower surface on which the upper electrode pattern 113 is formed. The upper connection pattern 115 may be formed on the other surface of the upper electrode pattern 113.

The upper connection pattern 115 is formed of a linear thin film conductive metal. The upper connection pattern 115 may be formed of the same conductive metal as the upper electrode pattern 113 or may be formed of a different conductive metal. The upper connection pattern 115 is a conductive metal of one of copper (Cu), silver (Ag), nickel (Ni), and platinum (Pt). The upper connection pattern 115 may be formed of a transparent electrode material such as ITO.

One end of the upper connection pattern 115 is connected to the upper electrode pattern 113. The other end of the lower connection pattern 135 is connected to the upper terminal pattern 117.

The upper terminal pattern 117 is formed on one surface of the upper base sheet 111. The upper terminal pattern 117 is formed on the upper surface of the upper base sheet 111 and the upper surface of the lower electrode pattern 113 and the upper connection pattern 115. The upper terminal pattern 117 may be formed on the other side of the upper electrode pattern 113 and the upper connection pattern 115. [ The upper terminal pattern 117 may be formed on the same surface as one of the upper electrode pattern 113 and the upper connection pattern 115 when the upper electrode pattern 113 and the upper connection pattern 115 are formed on different surfaces. have.

The upper terminal pattern 117 may extend from the upper connection pattern 115 and be formed outside the upper base sheet 111. At this time, a protection sheet 119 for insulation and protection of the upper terminal pattern 117 may be adhered to one surface of the upper terminal pattern 117.

The upper electrode pattern 113, the upper connection pattern 115, and the upper terminal pattern 117 are examples of thin metal conductive metal having a thickness of about 12 mu m.

Although the upper electrode pattern 113, the upper connection pattern 115, and the upper terminal pattern 117 have been separately described in order to easily describe the battery pressure sensing sensor 100 according to the embodiment of the present invention, The upper electrode pattern 113, the upper connection pattern 115, and the upper terminal pattern 117 may be integrally formed.

The elastic layer 120 is disposed between the upper electrode layer 110 and the lower electrode layer 130. The elastic layer 120 is formed of a material having elasticity. The elastic layer 120 is an elastic polymer including at least one of silicon (Si), polydimethylsiloxane (PDMS), EcoFlex, Nusil, hydrogel, and polyurethane do.

The elastic layer 120 is described between the upper electrode layer 110 and the lower electrode layer 130. The elastic layer 120 is interposed between the upper electrode layer 110 and the lower electrode layer 130 to form a space (or a gap) between the upper electrode layer 110 and the lower electrode layer 130. The thickness of the elastic layer 120 may be about 12 to 24 mu m.

Since the elastic material is mainly made of an insulating material, resistance is not formed between the upper electrode layer 110 and the lower electrode layer 130 even when a pressure due to the swelling of the battery is applied.

Accordingly, the elastic layer 120 is formed in a structure having a space (or void). The elastic layer 120 is formed of one of a dot space structure, a meshed structure, and a porous film structure.

The elastic layer 120 may be formed in a dot space structure by printing a plurality of dots on one surface of the upper electrode layer 110 or the lower electrode layer 130 through a printing process. A plurality of dots are formed at predetermined intervals. The dot space structure is a structure in which a resistive touch panel is mainly used.

The elastic layer 120 may print dots having different thicknesses twice to adjust the switching pressure of the battery pressure detection sensor 100. [

The elastic layer 120 can change the pattern of a plurality of dots to adjust the open rate of the dot spacers. The elastic layer 120 can adjust the switching pressure of the battery pressure detection sensor 100 through the Open Rate adjustment. Here, the open rate can mean the ratio of the area where the dot is not formed depending on the dot thickness and the interval.

The elastic layer 120 may be formed in a mesh structure by repeating the screen printing process. A plurality of elastic lines spaced apart from each other are formed during the screen printing process, and the elastic layer 120 having a net film structure in which a plurality of elastic lines are laminated is formed by repeating the screen printing process. The elastic layer 120 may be formed directly on one surface of the upper electrode layer 110 or the lower electrode layer 130 by screen printing.

The elastic layer 120 may be formed of a porous film structure having a plurality of pores by mixing a silver wire with an elastic material. The elastic layer 120 is an example of a porous film structure in which silver (Si) is mixed with silver.

The elastic layer 120 may be formed by punching a plurality of holes into the elastic film. The elastic layer 120 is a perforated structure in which a plurality of holes are formed in a polyimide thin film through a punching process.

The lower electrode layer 130 is formed of a flexible printed circuit board having electrodes formed thereon. The lower electrode layer 130 includes a lower base sheet 131, a lower electrode pattern 133, a lower connection pattern 135, and a lower terminal pattern 137. The lower electrode layer 130 is disposed below the upper electrode layer 110 so that the lower electrode pattern 133 and the upper electrode pattern 113 overlap each other.

The lower base sheet 131 is composed of a soft thin sheet. The lower base sheet 131 is formed of a flexible thin film sheet having a thickness of about 25 mu m as an example. Here, the lower base sheet 131 is a soft thin sheet of one of polyimide, polyester, glass epoxy, and polyethylene terephthalate.

The lower electrode pattern 133 is formed on one surface of the lower base sheet 131. The lower electrode pattern 133 is formed on one surface of the upper and lower surfaces of the lower base sheet 131 in the direction in which the elastic layer 120 is disposed. The lower electrode pattern 133 overlaps the upper electrode pattern 113 with the elastic layer 120 interposed therebetween,

The lower electrode pattern 133 is formed of a thin film conductive metal having a predetermined shape. The lower electrode pattern 133 may be formed in a polygonal shape such as a circle, an ellipse, a rectangle, a triangle, or the like. The lower electrode pattern 133 is a conductive metal of one of copper (Cu), silver (Ag), nickel (Ni), and platinum (Pt). The lower electrode pattern 133 may be formed of a transparent electrode material such as ITO.

The lower electrode pattern 133 is formed of a circular thin film made of copper and is formed on the upper surface of the lower base sheet 131 in the direction in which the elastic layer 120 is disposed.

The lower connection pattern 135 is formed on one surface of the lower base sheet 131. The lower connection pattern 135 is formed on one surface of the lower base sheet 131 on which the lower electrode pattern 133 is formed. The lower connection pattern 135 may be formed on the other surface of the lower electrode pattern 133.

The lower connection pattern 135 is formed of a linear thin film conductive metal. The lower connection pattern 135 may be formed of the same conductive metal as the lower electrode pattern 133 or may be formed of a different conductive metal. The lower connection pattern 135 is one of a conductive metal such as copper (Cu), silver (Ag), nickel (Ni), and platinum (Pt). The lower connection pattern 135 may be formed of a transparent electrode material such as ITO.

One end of the lower connection pattern 135 is connected to the lower electrode pattern 133. The other end of the lower connection pattern 135 is connected to the lower terminal pattern 137.

The lower terminal pattern 137 is formed on one surface of the lower base sheet 131. The lower terminal pattern 137 is formed on one surface of the lower base sheet 131 on which the lower electrode pattern 133 and the lower connection pattern 135 are formed. The lower terminal pattern 137 may be formed on the other surface of the lower electrode pattern 133 and the lower connection pattern 135. The lower terminal patterns 137 may be formed on the same surface as one of the lower electrode patterns 133 and the lower connection patterns 135 when the lower electrode patterns 133 and the lower connection patterns 135 are formed on different surfaces. have.

The lower terminal pattern 137 may extend from the lower connection pattern 135 and may be formed outside the lower base sheet 131. At this time, a protection sheet 139 for insulation and protection of the lower terminal pattern 137 may be adhered to one surface of the lower terminal pattern 137.

The lower connection pattern 135, the lower terminal pattern 137, and the lower terminal pattern 137 are examples of the thin metal conductive metal having a thickness of about 12 mu m.

Although the lower connection pattern 135, the lower electrode pattern 133, and the lower terminal pattern 137 have been separately described in order to easily describe the battery pressure sensing sensor 100 according to the embodiment of the present invention, The lower connection pattern 135, the lower terminal pattern 137, and the lower terminal pattern 137 may be integrally formed.

The adhesive layer 140 is disposed between the upper electrode layer 110 and the lower electrode layer 130 to bond the upper electrode layer 110 and the lower electrode layer 130. The adhesive layer 140 is a double-sided adhesive tape having a thickness of about 30 mu m as an example.

The adhesive layer 140 is formed with a receiving hole 142 in which the elastic layer 120 is received. Since the elastic layer 120 is accommodated in the accommodation hole 142, the thickness of the battery pressure sensing sensor 100 does not increase.

The battery pressure sensing sensor 100 according to the first embodiment of the present invention outputs a switching event that is short-circuited at a resistance value exceeding a set resistance value as an output value.

3 and 4, the battery pressure sensor 200 according to the second embodiment of the present invention includes an upper electrode layer 210, an elastic layer 220, a lower electrode layer 230, an upper adhesive layer 240, And a lower adhesive layer 250. The upper electrode layer 210 and the lower electrode layer 230 are the same as the upper electrode layer 210 and the lower electrode layer 230 of the battery pressure sensing sensor 200 according to the first embodiment and will not be described in detail.

The upper electrode layer 210 includes an upper base sheet 211, an upper electrode pattern 213, an upper connection pattern 215, and an upper terminal pattern 217.

The lower electrode layer 230 is disposed under the upper electrode layer 210. The lower electrode layer 230 includes a lower base sheet 231, a lower electrode pattern 233, a lower connection pattern 235, and a lower terminal pattern 237.

The elastic layer 220 is formed in a perforated structure. The elastic layer 220 may be formed by punching a plurality of holes 222 in the elastic film. The elastic layer 220 may be formed in a porous structure in which a plurality of holes 222 are formed only in a region overlapping the upper electrode pattern 213 and the lower electrode pattern 233. [

The elastic layer 220 is a perforated structure in which a plurality of holes 222 are formed in a thin film of urethane (Pu) through a punching process. At this time, the thickness of the elastic layer 220 (that is, the thickness of the thin film) is approximately 20 占 퐉.

The elastic layer 220 can adjust the switching pressure of the battery pressure sensing sensor 200 by varying the diameter of the hole 222 formed in the thin film. The elastic layer 220 may adjust the switching pressure of the battery pressure sensing sensor 200 by adjusting the diameter of the hole and the thickness ratio of the thin film.

The upper adhesive layer 240 is disposed between the upper electrode layer 210 and the elastic layer 220. The upper adhesive layer 240 bonds the upper electrode layer 210 and the elastic layer 220. The upper adhesive layer 240 may have a plurality of holes 242 corresponding to the plurality of holes 222 formed in the elastic layer 220.

The lower adhesive layer 250 is disposed between the elastic layer 220 and the lower electrode layer 230. The lower adhesive layer 250 bonds the elastic layer 220 and the lower electrode layer 230. The lower adhesive layer 250 may have a plurality of holes 252 corresponding to the plurality of holes 222 formed in the elastic layer 220.

The upper adhesive layer 240 and the lower adhesive layer 250 are examples of double-sided adhesive tapes having a thickness of about 5 mu m.

The battery pressure sensing sensor 200 according to the second embodiment of the present invention outputs a switching event that is short-circuited at a resistance value exceeding a set resistance value, as an output value.

5 and 6, a battery pressure sensor according to a third embodiment of the present invention includes a lower electrode layer 310, a piezoelectric layer 320, an upper electrode layer 330, a protective layer 340, and an adhesive layer 350 ).

The upper electrode layer 330 is composed of a flexible printed circuit board on which a first electrode 312 and a second electrode 316 are formed. To this end, the upper electrode layer 330 includes a base sheet 311, a first electrode 312, and a second electrode 316.

The base sheet 311 is composed of a flexible thin sheet. The base sheet 311 is, for example, composed of a flexible thin film sheet having a thickness of approximately 25 μm to 50 μm.

The base sheet 311 is, for example, a soft thin sheet of one of polyimide, polyester, glass epoxy, and polyethylene terephthalate. In addition, the thin film sheet can be applied to a material used as the base sheet 311 of the flexible printed circuit board. The base sheet 311 is a polyimide thin film sheet having a thickness of about 25 占 퐉 or a thin polyethylene terephthalate sheet having a thickness of about 50 占 퐉.

The first electrode 312 and the second electrode 316 are formed on one surface of the base sheet 311. The first electrode 312 and the second electrode 316 are formed on one surface of the base sheet 311 in the direction in which the piezoelectric layer 320 is disposed.

The first electrode 312 and the second electrode 316 are formed of a thin film conductive metal. The first electrode 312 and the second electrode 316 are formed of a conductive metal having a thickness of about 12 mu m. The first electrode 312 and the second electrode 316 are examples of the conductive metal of one of copper (Cu), silver (Ag), nickel (Ni), and platinum (Pt). The first electrode 312 and the second electrode 316 may be formed of a transparent electrode material such as ITO.

The first electrode 312 includes a first sensing pattern 313, a first connection pattern 314, and a first terminal pattern 315. The first sensing patterns 313 are composed of a plurality of mutually spaced linear patterns. The first connection pattern 314 is connected to one end of a plurality of linear patterns constituting the first sensing pattern 313. The first terminal pattern 315 is connected to the first sensing pattern 313. The first terminal pattern 315 may extend from the first connection pattern 314 and be formed outside the base sheet 311. At this time, a protective sheet for insulation and protection of the first terminal pattern 315 may be adhered to one surface of the first terminal pattern 315.

The second electrode 316 includes a second sensing pattern 317, a second connection pattern 318, and a second terminal pattern 319. The second sensing patterns 317 are composed of a plurality of mutually spaced linear patterns. The second connection pattern 318 is connected to one end of a plurality of linear patterns constituting the second sensing pattern 317. The second terminal pattern 319 is connected to the second sensing pattern 317. The second terminal pattern 319 may extend from the second connection pattern 318 and be formed outside the base sheet 311. At this time, a protective sheet for insulation and protection of the second terminal pattern 319 may be adhered to one surface of the second terminal pattern 319.

At this time, the linear patterns constituting the first sensing pattern 313 and the second sensing pattern 317 are alternately arranged. A plurality of linear patterns constituting the second sensing pattern 317 are arranged between the plurality of linear patterns constituting the first sensing pattern 313. [

The piezoelectric layer 320 is disposed on the upper portion of the lower electrode layer 310. The piezoelectric layer 320 is disposed on the first electrode 312 and the second electrode 316 formed on the lower electrode layer 310. The piezoelectric layer 320 is formed of a variable resistance material whose resistance varies depending on a pressure applied in contact with an object. The piezoelectric layer 320 may include a material whose sheet resistance changes depending on a pressure generated when an object is contacted. The piezoelectric layer 320 is an example of a quantum tunneling composite (QTC), which is a composite of a metallic material and a nonconductive elastomer. The piezoelectric layer 320 is a quantum tunneling compound having a thickness of approximately 8 to 10 mu m as an example.

The quantum tunneling compound is a variable-resistance material, which is a combination of surface-projecting metal particles in a non-conducting elastomeric binder. When the pressure is not applied, the metal particles are separated from each other and can not conduct electricity. The metal particles can be tunneled through the non-conductive elastomeric binder (insulator) adjacent to each other when the pressure is applied.

When the battery pressure sensing sensor generates pressure due to the battery swelling, a current flows in a portion where the piezoelectric layer 320 is closely attached. The upper electrode layer 330 and the lower electrode layer 310 are electrically connected by the piezoelectric layer 320. The battery pressure sensing sensor has a variable resistance value because the contact area between the upper electrode layer 330 and the lower electrode layer 310 is changed according to the intensity of the pressure applied to the piezoelectric layer 320. [

The upper electrode layer 330 is disposed on the piezoelectric layer 320. The upper electrode layer 330 overlaps the first electrode 312 and the second electrode 316 while covering a space between the first electrode 312 and the second electrode 316 of the lower electrode layer 310. [ The upper electrode layer 330 electrically connects the first electrode 312 and the second electrode 316 when a current flows through the piezoelectric layer 320 as pressure is applied due to battery swelling. The upper electrode layer 330 is formed of a conductive metal. The upper electrode layer 330 is carbon having a thickness of about 5 mu m as an example.

The protective layer 340 is disposed on the upper electrode layer 330. The protective layer 340 insulates and protects the upper electrode layer 330. The protective layer 340 is formed of a thin sheet of insulating material. The protective layer 340 is a polyimide (PI) material having a thickness of approximately 25 mu m or a thin sheet of polyethylene terephthalate (PET) material having a thickness of approximately 30 mu m.

The adhesive layer 350 is disposed between the lower electrode layer 310 and the protective layer 340 to adhere the lower electrode layer 310 and the protective layer 340. The adhesive layer 350 is formed with a receiving hole 352 in which the piezoelectric layer 320 and the upper electrode layer 330 are accommodated. The thickness of the adhesive layer 350 may be different depending on the thickness of the piezoelectric layer 320 and the upper electrode layer 330. The thickness of the adhesive layer 350 is formed to be thicker than the sum of the thickness of the piezoelectric layer 320 and the thickness of the electrode layer. The adhesive layer 350 is, for example, a double-sided adhesive tape having a thickness of approximately 30 μm to 50 μm.

The battery pressure sensing sensor according to the third embodiment of the present invention outputs a linear resistance value as an output value.

A terminal (hereinafter, referred to as a terminal) having a battery pressure sensing sensor according to an embodiment of the present invention includes all the electronic devices including a battery, such as a portable terminal such as a smart phone, a tablet, an auxiliary battery, .

A terminal according to an embodiment of the present invention processes battery pressure sensing signals by connecting

battery pressure sensors

100, 200, and 300 to a processor connected to an AD converter. In the following description, the battery

pressure sensing sensors

100, 200, and 300 are connected to the thermistor terminals. However, the present invention is not limited thereto. If the terminals are connected to the processor to which the AD converter is connected, have.

The battery pressure sensor according to the fourth and fifth embodiments of the present invention outputs an output value corresponding to a capacitance (i.e., a capacitance C) corresponding to a pressure applied by the swelling of the battery. The battery pressure detection sensor is an example of outputting a linear capacitance as an output value.

7 and 8, a battery pressure sensing sensor 400 according to a fourth embodiment of the present invention includes an upper electrode layer 410, an elastic layer 420, a lower electrode layer 430, and an adhesive layer 440 do.

The upper electrode layer 410 is formed of a flexible printed circuit board on which electrodes are formed. The upper electrode layer 410 includes an upper base sheet 411, an upper electrode pattern 413, an upper connection pattern 415, and an upper terminal pattern 417.

The upper base sheet 411 is composed of a flexible thin sheet. The upper base sheet 411 is an example of a flexible thin film sheet having a thickness of about 25 mu m.

The upper electrode pattern 413 is formed on one surface of the upper base sheet 411. The upper electrode pattern 413 is formed on one surface of the upper base sheet 411 in the direction in which the elastic layer 420 is disposed.

The upper electrode pattern 413 is formed of a thin film conductive metal having a predetermined shape. The upper electrode pattern 413 may be formed in a polygonal shape such as a circle, an ellipse, a rectangle, a triangle, or the like. The upper electrode pattern 413 is a conductive metal of one of copper (Cu), silver (Ag), nickel (Ni), and platinum (Pt). The upper electrode pattern 413 may be formed of a transparent electrode material such as ITO.

The upper electrode pattern 413 is formed of a circular thin film made of copper and formed on the lower surface of the upper base sheet 411 in the direction in which the elastic layer 420 is disposed.

The upper connection pattern 415 is formed on one surface of the upper base sheet 411. The upper connection pattern 415 is formed on the upper surface of the upper base sheet 411 and on one surface of the lower surface on which the upper electrode pattern 413 is formed. The upper connection pattern 415 may be formed on the other surface of the upper electrode pattern 413.

The upper connection pattern 415 is formed of a linear thin film conductive metal. The upper connection pattern 415 may be formed of the same conductive metal as the upper electrode pattern 413 or may be formed of a different conductive metal. The upper connection pattern 415 is a conductive metal of one of copper (Cu), silver (Ag), nickel (Ni), and platinum (Pt). The upper connection pattern 415 may be formed of a transparent electrode material such as ITO.

One end of the upper connection pattern 415 is connected to the upper electrode pattern 413. The other end of the lower connection pattern 435 is connected to the upper terminal pattern 417.

The upper terminal pattern 417 is formed on one surface of the upper base sheet 411. The upper terminal pattern 417 is formed on the upper surface of the upper base sheet 411 and on one surface of the lower surface on which the upper electrode pattern 413 and the upper connection pattern 415 are formed. The upper terminal pattern 417 may be formed on the other side of the upper electrode pattern 413 and the upper connection pattern 415. The upper terminal pattern 417 may be formed on the same surface as one of the upper electrode pattern 413 and the upper connection pattern 415 when the upper electrode pattern 413 and the upper connection pattern 415 are formed on different surfaces. have.

The upper terminal pattern 417 may extend from the upper connection pattern 415 and may be formed outside the upper base sheet 411. At this time, a protective sheet 419 for insulating and protecting the upper terminal pattern 417 may be adhered to one surface of the upper terminal pattern 417.

The upper connection pattern 415, the upper terminal pattern 417 and the upper terminal pattern 417 are examples of thin metal conductive metal having a thickness of about 12 mu m.

Although the upper connection pattern 415, the upper electrode pattern 413, and the upper terminal pattern 417 have been separately described to easily describe the battery pressure sensing sensor 400 according to the fourth embodiment of the present invention, The upper connection pattern 415, the upper terminal pattern 417 and the upper terminal pattern 417 may be integrally formed.

The elastic layer 420 is disposed between the upper electrode layer 410 and the lower electrode layer 430. The elastic layer 420 is formed of a material having elasticity.

The elastic layer 420 is formed of a thin sheet of an elastic material. The elastic layer 420 may be formed by directly printing an elastic material on one surface of the upper electrode layer 410 or the lower electrode layer 430 through a screen printing process.

The lower electrode layer 430 is formed of a flexible printed circuit board having electrodes formed thereon. The lower electrode layer 430 includes a lower base sheet 431, a lower electrode pattern 433, a lower connection pattern 435, and a lower terminal pattern 437. The lower electrode layer 430 is disposed under the upper electrode layer 410 so that the lower electrode pattern 433 and the upper electrode pattern 413 overlap each other.

The lower base sheet 431 is composed of a soft thin sheet. The lower base sheet 431 is formed of a flexible thin film sheet having a thickness of approximately 25 mu m as an example.

The lower electrode pattern 433 is formed on one surface of the lower base sheet 431. The lower electrode pattern 433 is formed on one side of the upper surface and the lower surface of the lower base sheet 431 in the direction in which the elastic layer 420 is disposed. The lower electrode pattern 433 overlaps the upper electrode pattern 413 with the elastic layer 420 therebetween.

The lower electrode pattern 433 is formed of a thin film conductive metal of a predetermined shape. The lower electrode pattern 433 may be formed in a polygonal shape such as a circle, an ellipse, a rectangle, a triangle, or the like. The lower electrode pattern 433 is a conductive metal of one of copper (Cu), silver (Ag), nickel (Ni), and platinum (Pt). The lower electrode pattern 433 may be formed of a transparent electrode material such as ITO.

The lower electrode pattern 433 is formed of a circular thin film made of copper and is formed on the upper surface of the lower base sheet 431 in the direction in which the elastic layer 420 is disposed.

The lower connection pattern 435 is formed on one surface of the lower base sheet 431. The lower connection pattern 435 is formed on one surface of the lower base sheet 431 on which the lower electrode pattern 433 is formed. The lower connection pattern 435 may be formed on the other surface of the lower electrode pattern 433.

The lower connection pattern 435 is formed of a linear thin film conductive metal. The lower connection pattern 435 may be formed of the same conductive metal as the lower electrode pattern 433 or may be formed of a different conductive metal. The lower connection pattern 435 is a conductive metal of one of copper (Cu), silver (Ag), nickel (Ni), and platinum (Pt). The lower connection pattern 435 may be formed of a transparent electrode material such as ITO.

One end of the lower connection pattern 435 is connected to the lower electrode pattern 433. The other end of the lower connection pattern 435 is connected to the lower terminal pattern 437.

The lower terminal pattern 437 is formed on one surface of the lower base sheet 431. The lower terminal pattern 437 is formed on the upper surface of the lower base sheet 431 and the lower surface of the lower surface of the lower base sheet 431 and the lower connection pattern 435. The lower terminal pattern 437 may be formed on the other surface of the lower electrode pattern 433 and the lower connection pattern 435. The lower terminal pattern 437 may be formed on the same surface as one of the lower electrode pattern 433 and the lower connection pattern 435 when the lower electrode pattern 433 and the lower connection pattern 435 are formed on different surfaces. have.

The lower terminal pattern 437 may extend from the lower connection pattern 435 and may be formed outside the lower base sheet 431. At this time, a protection sheet 439 for insulation and protection of the lower terminal pattern 437 may be adhered to one surface of the lower terminal pattern 437.

The lower connection pattern 435, the lower terminal pattern 437, and the lower terminal pattern 437 are examples of thin metal conductive metal having a thickness of about 12 mu m.

Although the lower connection pattern 435, the lower electrode pattern 433, and the lower terminal pattern 437 are separately described to easily describe the battery pressure sensing sensor 400 according to the fourth embodiment of the present invention, The lower connection pattern 435, the lower terminal pattern 437 and the lower terminal pattern 437 may be integrally formed.

The adhesive layer 440 is disposed between the upper electrode layer 410 and the lower electrode layer 430 to bond the upper electrode layer 410 and the lower electrode layer 430. The adhesive layer 440 is a double-sided adhesive tape having a thickness of about 30 mu m as an example.

The adhesive layer 440 is formed with a receiving hole 442 in which the elastic layer 420 is received. Since the elastic layer 420 is accommodated in the accommodation hole 442, the thickness of the battery pressure sensing sensor 400 does not increase.

9 and 10, a battery pressure sensor 500 according to a fifth embodiment of the present invention includes an upper electrode layer 510, an elastic layer 520, a lower electrode layer 530, an upper adhesive layer 540, And a lower adhesive layer 550. The upper electrode layer 510 and the lower electrode layer 530 are the same as those of the upper electrode layer 510 and the lower electrode layer 530 of the battery pressure sensing sensor 500 according to the fourth embodiment.

The upper electrode layer 510 includes an upper base sheet 511, an upper electrode pattern 513, an upper connection pattern 515, and an upper terminal pattern 517.

The lower electrode layer 530 is disposed under the upper electrode layer 510. The lower electrode layer 530 includes a lower base sheet 531, a lower electrode pattern 533, a lower connection pattern 535, and a lower terminal pattern 537.

The elastic layer 520 is disposed between the upper electrode layer 510 and the lower electrode layer 530. The elastic layer 520 is formed of a material having elasticity.

The elastic layer 520 is formed of a thin sheet of an elastic material. The elastic layer 520 may be formed by directly printing an elastic material on one surface of the upper electrode layer 510 or the lower electrode layer 530 through a screen printing process.

An upper adhesive layer 540 is disposed between the upper electrode layer 510 and the elastic layer 520. The upper adhesive layer 540 bonds the upper electrode layer 510 and the elastic layer 520. The upper adhesive layer 540 may have a plurality of holes 542 corresponding to the plurality of holes 522 formed in the elastic layer 520.

The lower adhesive layer 550 is disposed between the elastic layer 520 and the lower electrode layer 530. The lower adhesive layer 550 bonds the elastic layer 520 and the lower electrode layer 530. The lower adhesive layer 550 may have a plurality of holes 552 corresponding to the plurality of holes 522 formed in the elastic layer 520.

The upper adhesive layer 540 and the lower adhesive layer 550 are examples of a double-sided adhesive tape having a thickness of about 5 mu m.

A terminal (hereinafter referred to as a terminal) having a battery pressure sensing sensor according to the first embodiment of the present invention can be used as a portable terminal such as a smart phone or a tablet, an auxiliary battery such as a battery pouch, Devices.

battery pressure sensors

pressure sensing sensors

11, the terminal according to the first embodiment of the present invention includes a thermistor 610, a thermistor terminal 620, a battery pressure sensing sensor 630, a central processing unit (AP) 640, Circuit 650,

The thermistor 610 is mounted on the terminal and outputs a resistance value according to the temperature. The thermistor 610 is a semiconductor device having a property that the resistance value decreases sharply as the internal temperature of the terminal rises. The thermistor 610 is disposed around the main heat generating components such as an antenna built in the terminal, a USB charging terminal, a central processing unit 640, and a power management integrated circuit (PMIC).

The thermistor terminals 620 are composed of a pair of

terminals

620a and 620b. The thermistor terminal 620 is connected to both ends of the thermistor 610. The thermistor terminal 620 is connected to the central processing unit 640 via a bus. The thermistor terminal 620 is connected to an antenna, a USB charging terminal, a central processing unit 640, and a thermistor 610 disposed around one of the power management circuits.

The battery pressure sensing sensor 630 is disposed in a state of overlapping with the battery 10 mounted on the terminal. The battery pressure detection sensor 630 is disposed so as to overlap the battery 10 and the electrode pattern. The battery pressure detection sensor 630 outputs a resistance value corresponding to the pressure applied by the battery 10 bulging.

The battery pressure detection sensor 630 outputs a linear resistance value corresponding to the swelling of the battery 10. The battery pressure detection sensor 630 may output a switching event which is short-circuited at a resistance value exceeding a set resistance value as an output value.

The battery pressure sensing sensor 630 is connected to the thermistor terminal 620. Both ends of the battery pressure detection sensor 630 are connected to a pair of

terminals

620a and 620b constituting the thermistor terminal 620, respectively. The battery pressure detection sensor 630 outputs the output value to the thermistor terminal 620. The thermistor terminal 620 transmits the output value to the central processing unit 640 via the bus.

Here, the battery pressure detection sensor 630 is one example of the battery

pressure detection sensors

100, 200, and 300 according to the first to third embodiments.

The central processing unit 640 is connected to the thermistor terminal 620. The central processing unit 640 receives the output value of the battery pressure detection sensor 630 through the thermistor terminal 620. [ The central processing unit 640 receives a linear resistance value from the battery pressure detection sensor 630 and an output value of one of the switching events.

The central processing unit 640 controls the charging of the battery 10 based on the output value received from the battery pressure detection sensor 630. The central processing unit 640 controls the charging of the battery in an event mode or a multi-stage mode based on the output value.

The central processing unit 640 interrupts the charging of the battery 10 when the output value of the battery pressure detection sensor 630 is a switching event. When the central processing unit 640 receives the output value of the switching event, the central processing unit 640 determines that the battery 10 can ignite and explode and blocks the charging of the battery 10.

When the output value of the battery pressure detection sensor 630 is a linear resistance value, the central processing unit 640 compares the output value and the reference value and controls the charging of the battery 10. [ The central processing unit 640 controls the charging of the battery 10 stepwise based on a plurality of reference values and an output value. The reference value is a value set to prevent ignition and explosion due to swelling of the battery 10, and is an example of a resistance value.

The central processing unit 640 varies the charging current of the battery 10 when the battery charging is controlled in a multi-step manner. The central processing unit 640 controls the charging current to be gradually increased or decreased according to the linear resistance value so as to charge the battery 10.

The battery charging circuit 650 charges the battery 10 under the control of the central processing unit 640. The battery charging circuit 650 turns on / off the charging of the battery 10 under the control of the central processing unit 640. The battery charging circuit 650 charges the battery 10 by increasing or decreasing the charging current under the control of the central processing unit 640.

The terminal according to the second embodiment of the present invention includes a battery pressure sensor 400 or 500 connected to a controller of a touch screen panel (TSP) or a processor connected to an AD converter processor to process the battery pressure sensing signal.

12, the terminal according to the second embodiment of the present invention includes a battery pressure sensing sensor 710, a sensor terminal 720, an AD converter 730, a central processing unit (AP) 740, And a charging circuit 750.

The battery pressure sensing sensor 710 is disposed in a superposition with the battery 10 mounted on the terminal. The battery pressure sensing sensor 710 is disposed so that the battery 10 and the electrode pattern overlap. The battery pressure detection sensor 710 outputs a capacitance corresponding to the pressure applied by the battery 10 bulging. The battery pressure detection sensor 710 outputs a linear capacitance corresponding to the swelling of the battery 10.

The battery pressure sensing sensor 710 is connected to the sensor terminal 720. Both ends of the battery pressure detection sensor 710 are connected to a pair of

terminals

720a and 720b constituting the sensor terminal 720, respectively. The battery pressure detection sensor 710 outputs an output value (i.e., electrostatic capacitance) to the sensor terminal 720.

Here, the battery pressure detection sensor 710 is one example of the battery pressure detection sensors 400 and 500 according to the fourth and fifth embodiments.

The sensor terminal 720 is connected to the battery pressure detection sensor 710 and the AD converter 730. The sensor terminals 720 are composed of a pair of

terminals

720a and 720b. The sensor terminal 720 transmits to the AD converter 730 via the bus.

The AD converter 730 receives the capacitance value which is an output value of the battery

pressure detection sensors

100, 200 and 400 through the sensor terminal 720. The AD converter 730 converts the electrostatic capacitance, which is analog data, into digital data and transmits the digital data to the central processing unit 740.

The central processing unit 740 is connected to the AD converter 730. The central processing unit 740 receives the output value of the battery pressure detection sensor 710 through the AD converter 730. The central processing unit 740 receives a linear capacitance which is an output value of the battery pressure detection sensor 710. Here, the central processing unit 740 is an example of a controller of the touch screen pattern (TSP).

The central processing unit 740 controls the charging of the battery 10 based on the output value received from the battery pressure detection sensor 710. The central processing unit 740 controls the charging of the battery by an event method or a multi-step method based on the output value.

The central processing unit 740 compares the output value and the reference value to control charging of the battery 10 if the output value of the battery pressure detection sensor 710 is a linear capacitance. The central processing unit 740 cuts off the charging of the battery 10 when the electrostatic capacity as the output value exceeds the reference value.

The central processing unit 740 may control the charging of the battery 10 stepwise based on a plurality of reference values and an output value. The reference value is a value set to prevent ignition and explosion due to swelling of the battery 10, and is an example of a capacitance.

The central processing unit 740 varies the charging current of the battery 10 when the battery charging is controlled in a multi-step manner. The central processing unit 740 controls the charging current to be gradually increased or decreased according to the linear capacitance so as to charge the battery 10.

The battery charging circuit 750 charges the battery 10 under the control of the central processing unit 740. The battery charging circuit 750 turns on / off the charging of the battery 10 under the control of the central processing unit 740. The battery charging circuit 750 charges the battery 10 by increasing or decreasing the charging current under the control of the central processing unit 740.

13, the terminal according to the third embodiment of the present invention includes an antenna 810, an antenna terminal 820, a battery pressure detection sensor 830, a central processing unit 840, and a battery charging circuit 850 .

The antenna 810 is composed of a single antenna 810 resonating in one frequency band. The antenna 810 is one example of an NFC antenna for short range communication, an MST antenna for electronic payment, and a WPC antenna for wireless power transmission.

The antenna terminals 820 are composed of a pair of terminals. The antenna terminal 820 is connected to both ends of the antenna 810. The antenna terminal 820 is connected to the central processing unit 840 via a bus.

The battery pressure detection sensor 830 is disposed in an overlapping relation with the battery 10 mounted on the terminal. The battery pressure sensing sensor 830 is disposed so as to overlap the battery 10 and the electrode pattern. The battery pressure detection sensor 830 outputs a resistance value corresponding to the pressure applied by the battery 10 bulging.

The battery pressure detection sensor 830 outputs a linear resistance value corresponding to the swelling of the battery 10. The battery pressure detection sensor 830 may output a switching event that is short-circuited at a resistance value exceeding a set resistance value as an output value.

If the antenna 810 is a short-range communication antenna, the battery pressure detection sensor 830 outputs a switching event as an output value. When the battery pressure detection sensor 830 is configured to output a linear resistance value (that is, the structure of the battery pressure detection sensor 300 of the third embodiment), the known frequency of the antenna for the short range communication is incorrect and communication can not be performed. Therefore, if the antenna 810 is an antenna for short-distance communication, the battery pressure detection sensor 830 is constituted by the battery

pressure detection sensors

100 and 200 of the first embodiment or the second embodiment.

The battery pressure detection sensor 830 is connected to the antenna terminal 820. Both ends of the battery pressure detection sensor 830 are connected to a pair of terminals constituting the antenna terminal 820, respectively. The battery pressure detection sensor 830 outputs the output value to the antenna terminal 820. The antenna terminal 820 transmits the output value to the central processing unit 840 via the bus.

The central processing unit 840 is connected to the antenna terminal 820. The central processing unit 840 receives the output value of the battery pressure detection sensor 830 through the antenna terminal 820. The central processing unit 840 receives a linear resistance value from the battery pressure detection sensor 830 and an output value of one of the switching events.

The central processing unit 840 controls the charging of the battery 10 based on the output value received from the battery pressure detection sensor 830. The central processing unit 840 controls the charging of the battery in an event mode or a multistep mode based on the output value.

The central processing unit 840 cuts off the charging of the battery 10 when the output value of the battery pressure detection sensor 830 is a switching event. When the central processing unit 840 receives the output value as the switching event, the central processing unit 840 determines that the battery 10 can ignite and explode and blocks the charging of the battery 10.

The central processing unit 840 controls the charging of the battery 10 by comparing the output value and the reference value when the output value of the battery pressure detection sensor 830 is a linear resistance value. The central processing unit 840 controls the charging of the battery 10 stepwise based on a plurality of reference values and an output value. The reference value is a value set to prevent ignition and explosion due to swelling of the battery 10, and is an example of a resistance value.

The central processing unit 840 varies the charging current of the battery 10 when the battery charging is controlled in a multi-step manner. The central processing unit 840 controls the charging current to be gradually increased or decreased according to the linear resistance value so as to charge the battery 10.

The battery charging circuit 850 charges the battery 10 under the control of the central processing unit 840. The battery charging circuit 850 turns on / off the charging of the battery 10 under the control of the central processing unit 840. The battery charging circuit 850 charges the battery 10 by increasing or decreasing the charge current under the control of the central processing unit 840. [

14, a terminal according to a fourth embodiment of the present invention includes a composite antenna 910, an antenna terminal 920, a battery pressure detection sensor 930, a central processing unit 940, and a battery charging circuit 950, .

The composite antenna 910 includes a plurality of antennas 910. The composite antenna 910 includes an NFC antenna 912, an MST antenna 914, and a wireless power transmission (WPC) antenna 916 as an example.

The antenna terminal 920 is composed of a plurality of terminals 920a to 920f. Each antenna 910 is connected to a pair of

terminals

920a and 920b, 920c and 920d, 920e and 920f.

The antenna terminal 920 includes a pair of

terminals

920a and 920b connected to the antenna for short-range communication 912, a pair of

terminals

920c and 920d connected to the electronic payment antenna 914, And a pair of

terminals

920e and 920f connected to the input /

output terminals

920a and 920f.

The battery pressure detection sensor 930 is arranged to overlap with the battery 10 mounted on the terminal. The battery pressure detection sensor 930 is disposed so that the battery 10 and the electrode pattern overlap.

The battery pressure detection sensor 930 outputs a resistance value corresponding to the pressure applied by the battery 10 bulging. The battery pressure detection sensor 930 outputs a linear resistance value corresponding to the swelling of the battery 10. The battery pressure detection sensor 930 may output a switching event that is short-circuited at a resistance value exceeding the set resistance value as an output value. The battery pressure detection sensor 930 is one example of the battery pressure detection sensor 930 of the first to third embodiments.

The battery pressure detection sensor 930 may output the capacitance corresponding to the pressure applied by the battery 10 bulging. The battery pressure detection sensor 930 outputs a linear capacitance corresponding to the swelling of the battery 10.

The battery pressure detection sensor 930 is connected to the antenna terminal 920. Both ends of the battery pressure detection sensor 930 are connected to terminals connected to different antennas 910 among a plurality of terminals constituting the antenna terminal 920, respectively. Both ends of the battery pressure sensing sensor 930 are connected to terminals to which one end of the electronic settlement antenna 910 is connected and terminals to which the wireless power transmission antenna 910 is connected, respectively. The battery pressure detection sensor 930 outputs the output value to the antenna terminal 920. The antenna terminal 920 transmits the output value to the central processing unit 940 via the bus.

The central processing unit 940 is connected to the antenna terminal 920. The central processing unit 940 receives the output value of the battery pressure detection sensor 930 through the antenna terminal 920. The central processing unit 940 receives the output value of one of the linear resistance value, the switching event and the linear capacitance from the battery pressure detection sensor 930.

The central processing unit 940 controls the charging of the battery 10 based on the output value received from the battery pressure detection sensor 930. The central processing unit 940 controls battery charging in an event mode or a multistage manner based on the output value.

The central processing unit 940 blocks the charging of the battery 10 based on the output value of the battery pressure detection sensor 930. When the central processing unit 940 receives the output value as the switching event, the central processing unit 940 determines that the battery 10 can ignite and explode and blocks the charging of the battery 10. At this time, the central processing unit 940 may determine that the battery 10 can ignite or explode if the electrostatic capacity exceeds the reference electrostatic capacity, and may block the charging of the battery 10. [

The central processing unit 940 controls the charging of the battery 10 by comparing the output value and the reference value when the output value of the battery pressure detection sensor 930 is a linear resistance value or capacitance. The central processing unit 940 controls the charging of the battery 10 step by step based on a plurality of reference values and output values. The reference value is a value set to prevent ignition and explosion due to swelling of the battery 10 and is a resistance value or a capacitance.

The central processing unit 940 varies the charge current of the battery 10 when the charge of the battery is controlled in a multi-step manner. The central processing unit 940 controls the charging current to be gradually increased or decreased according to the linear resistance value or the capacitance to charge the battery 10.

The battery charging circuit 950 charges the battery 10 under the control of the central processing unit 940. The battery charging circuit 950 turns on / off the charging of the battery 10 under the control of the central processing unit 940. The battery charging circuit 950 charges the battery 10 by increasing or decreasing the charging current under the control of the central processing unit 940.

Referring to FIG. 15, the battery pressure sensor 930 may be formed integrally with the composite antenna 910. The battery pressure detection sensor 930 is formed on a printed circuit board on which a plurality of

antennas

912, 914, and 916 are formed. The battery pressure detection sensor 930 may be formed integrally with the antenna 910 formed with one antenna or thermistor.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but many variations and modifications may be made without departing from the scope of the present invention. It will be understood that the invention may be practiced.

Claims

An upper electrode layer having an upper electrode pattern;

A lower electrode layer disposed under the upper electrode layer and having a lower electrode pattern superimposed on the upper electrode pattern; And

And an elastic layer disposed between the upper electrode layer and the lower electrode layer,

Wherein the elastic layer is overlapped with the upper electrode pattern and the lower electrode pattern.
The method according to claim 1,

The elastic layer includes a dot space structure in which a plurality of dots are spaced apart from each other, a net membrane structure in which a plurality of linear patterns are stacked, a porous film structure in which a plurality of pores are formed, One structure of the structure is the battery pressure sensor.
The method according to claim 1,

And an adhesive layer disposed between the upper electrode layer and the lower electrode layer and adhering the upper electrode layer and the lower electrode layer,

Wherein the adhesive layer includes a receiving hole for receiving the elastic layer.
A lower electrode layer having a first electrode and a second electrode formed thereon;

A piezoelectric layer disposed on the lower electrode layer and superimposed on the first electrode and the second electrode; And

And a top electrode layer disposed on top of the piezoelectric layer.
5. The method of claim 4,

Wherein the first electrode and the second electrode comprise a plurality of linear patterns spaced apart from each other and a linear pattern constituting the second electrode is disposed between the linear patterns constituting the first electrode.
5. The method of claim 4,

Wherein the piezoelectric layer is made of a variable resistance material, the upper electrode layer is carbon,

Wherein the resistance variable material is a Quantum Tunneling Composite (QTC).
5. The method of claim 4,

A protective layer disposed on the upper electrode layer; And

And an adhesion layer disposed between the lower electrode layer and the protection layer and bonding the lower electrode layer and the protection layer,

Wherein the adhesive layer has a receiving hole for receiving the piezoelectric layer and the upper electrode layer.
In a terminal equipped with a battery,

A thermistor terminal connected to the thermistor mounted on the terminal;

A battery pressure sensor connected to the thermistor terminal and arranged to be overlapped with the battery and outputting an output value corresponding to a pressure applied by the swelling of the battery; And

And a central processing unit connected to the thermistor terminal for controlling charging of the battery based on an output value of the battery pressure detecting sensor,

Wherein the thermistor is disposed in at least one of an antenna, a USB charging terminal, the central processing unit, and a power management circuit.
9. The method of claim 8,

Wherein the battery pressure detection sensor outputs a resistance value corresponding to a pressure applied by the swelling of the battery as an output value,

Wherein the central processing unit varies the charge current of the battery to charge the battery when the output value of the battery pressure detection sensor is a resistance value.
9. The method of claim 8,

Wherein the battery pressure detection sensor outputs a switching event as an output value when a resistance value corresponding to a pressure applied by the swelling of the battery exceeds a set value,

Wherein the central processing unit cuts off charging of the battery when an output value of the battery pressure detection sensor is a switching event.
In a terminal equipped with a battery,

A battery pressure detection sensor connected to the sensor terminal in a superposed relationship with the battery and outputting an output value corresponding to a pressure applied by the swelling of the battery;

An AD converter connected to the sensor terminal and converting an output value of the battery pressure sensor into a digital signal; And

And a central processing unit for controlling charging of the battery based on an output value converted into a digital signal by the AD converter.
12. The method of claim 11,

Wherein the battery pressure detection sensor outputs a capacitance corresponding to a pressure applied by the swelling of the battery as an output value.
12. The method of claim 11,

Wherein the central processing unit cuts off charging of the battery when an output value converted into a digital signal by the AD converter exceeds a set value.
12. The method of claim 11,

Wherein the central processing unit varies the charge current of the battery based on an output value converted into a digital signal by the AD converter and a plurality of reference values to charge the battery.
In a terminal equipped with a battery,

An antenna terminal connected to the antenna mounted on the terminal;

A battery pressure detecting sensor connected to the antenna terminal and disposed in a superposed relationship with the battery, for outputting one of a resistance value, a switching event and a capacitance corresponding to a pressure applied by the swelling of the battery as an output value; And

And a central processing unit connected to the antenna terminal and controlling charging of the battery based on an output value of the battery pressure detecting sensor.
16. The method of claim 15,

Wherein the antenna terminal is connected to one of an electronic payment antenna, a wireless power transmission antenna, and a short-range communication antenna.
17. The method of claim 16,

Wherein the antenna connected to the antenna terminal is a short-range communication antenna and outputs a switching event as an output value when a resistance value corresponding to a pressure applied by the swelling of the battery exceeds a set value.
16. The method of claim 15,

Wherein the antenna terminal has a plurality of terminals connected to a plurality of antennas, and the battery pressure detection sensor is connected to terminals of different ones of the plurality of terminals.
16. The method of claim 15,

The central processing unit,

And for blocking the charging of the battery when the output value of the battery pressure detection sensor exceeds a set value.
16. The method of claim 15,

The central processing unit,

Wherein the charging current of the battery is varied based on an output value of the battery pressure sensor and a plurality of reference values to charge the battery.