CN114079302A - Charging circuit, charging chip, electronic device and charging method - Google Patents

Charging circuit, charging chip, electronic device and charging method Download PDF

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Publication number
CN114079302A
CN114079302A CN202010831334.9A CN202010831334A CN114079302A CN 114079302 A CN114079302 A CN 114079302A CN 202010831334 A CN202010831334 A CN 202010831334A CN 114079302 A CN114079302 A CN 114079302A
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CN
China
Prior art keywords
charging
unit
module
electronic switch
charged
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Granted
Application number
CN202010831334.9A
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Chinese (zh)
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CN114079302B (en
Inventor
刘剑
邱钰鹏
朱辰
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Honor Device Co Ltd
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Honor Device Co Ltd
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Priority to CN202010831334.9A priority Critical patent/CN114079302B/en
Priority to CN202211469143.8A priority patent/CN115811106B/en
Publication of CN114079302A publication Critical patent/CN114079302A/en
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Publication of CN114079302B publication Critical patent/CN114079302B/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304—Overcurrent protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00308—Overvoltage protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • H02J7/0045—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction concerning the insertion or the connection of the batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The embodiment of the application provides a charging circuit, a charging chip, electronic equipment and a charging method, wherein the charging circuit comprises a charging module, a first control module and a second control module; the charging module is used for receiving first electric energy transmitted by the wireless charger and charging the battery to be charged with the first electric energy in a quick charging mode; the first control module is connected with the charging module and used for judging whether the external equipment is a wired charger or not when the external equipment is detected to be plugged with the charging module; the first control module is also used for controlling the charging module to charge the battery to be charged in a quick charging mode when the external equipment is not a wired charger; the second control module is connected with the charging module, works under the first electric energy provided by the charging module, and is used for controlling the disconnection of the power supply path between the charging module and the external equipment.

Description

Charging circuit, charging chip, electronic device and charging method
Technical Field
The present disclosure relates to the field of charging technologies, and in particular, to a charging circuit, a charging chip, an electronic device, and a charging method.
Background
With the increasing and increasing functions of electronic devices, the charging technology of electronic devices is also continuously developed and advanced, and wireless charging is gradually developed into a new charging trend in order to improve the charging convenience.
An electronic device having a USB interface may generally charge another electronic device having a USB interface using a charging function of an OTG (On-The-Go) function. However, when the electronic device as the main device is performing wireless fast charging, the external device is inserted, and the main device switches to the slow charging mode in order to protect the external device, which results in a long charging time for the main device.
Disclosure of Invention
The application provides a charging circuit, a charging chip, electronic equipment and a charging method, and aims to solve the problem that the charging time of main equipment is long due to the fact that the main equipment is switched to a low-speed charging mode for protecting external equipment when the main equipment is inserted into the external equipment during wireless quick charging.
In a first aspect, the present application provides a charging circuit, comprising:
the charging module is used for receiving first electric energy transmitted by a wireless charger and charging the battery to be charged with the first electric energy in a quick charging mode;
the first control module is connected with the charging module and used for judging whether the external equipment is a wired charger or not when the external equipment is detected to be plugged with the charging module;
the first control module is also used for controlling the charging module to keep charging the battery to be charged in a quick charging mode when the external equipment is not a wired charger;
the second control module is connected with the charging module, works under the first electric energy provided by the charging module, and is used for controlling the disconnection of the charging module and a power supply path of the external equipment. Through the scheme that this embodiment provided, when the module of charging is treating rechargeable battery and carries out wireless charging with the quick charge mode, detect when first control module that there is external equipment and the module of charging to peg graft, and external equipment is not wired charger, control the module of charging and keep charging for treating rechargeable battery with the quick charge mode, thereby can reduce rechargeable battery's the charge time, the disconnection of the power supply route of second control module of charging and external equipment, thereby can avoid external equipment to receive the damage under higher charging voltage, because the second control module works under the first electric energy that the module of charging provided, therefore, can avoid when electronic equipment takes place unusually in wireless charging process, the phenomenon that the power supply route of the unable control module of charging and external equipment breaks off takes place.
In a possible design, the first control module is further configured to control the charging module to disconnect from a power supply path of the external device when the external device is not a wired charger. Through the scheme provided by the embodiment, the disconnection control of the power supply path between the charging module and the external equipment has double guarantees.
In a possible design, the first control module is further configured to control the charging module to stop receiving the first electric energy transmitted by the wireless charger and control the charging module to be conducted with a power supply path of the wired charger when the external device is the wired charger. Through the scheme that this embodiment provided, when the external device that is connected with the module of charging is wired charger, by the first electric energy that the module control of charging stopped receiving wireless charger transmission of first control module to control the power supply route of the module of charging and wired charger to switch on, can avoid treating rechargeable battery takes place to charge disorderly, and make rechargeable battery's charging can normally go on.
In one possible design, further comprising:
the first conversion module is used for converting the voltage provided by the battery to be charged into a first voltage to supply power to the external equipment when the external equipment is not a wired charger. Through the scheme provided by the embodiment, even if the battery to be charged is wirelessly charged, the external equipment can also obtain normal voltage power supply.
In one possible design, the charging module includes:
the first interface unit is used for plugging the external equipment;
the charging unit is used for receiving first electric energy transmitted by a wireless charger and charging the battery to be charged with the first electric energy in a quick charging mode;
and the switch unit is connected between the first interface unit and the charging unit, is also connected with the second control module and is used for being controlled by the second control module to disconnect the connection between the first interface unit and the charging unit. Through the scheme provided by the embodiment, the control of the power supply path between the charging module and the external equipment is more effective and reliable.
In a possible design, when the external device is a wired charger, the switch unit is controlled by the first control module to establish a connection between the first interface unit and the charging unit.
In a possible design, when the external device is not a wired charger, the switch unit is controlled by the first control module to disconnect the connection between the first interface unit and the charging unit.
In one possible design, the switch unit includes a first electronic switch, a second electronic switch, and a third electronic switch; the charging unit comprises a first chip; the first end of the first electronic switch is connected with the first interface unit, the second end of the first electronic switch is connected with the first end of the second electronic switch, and the third end of the first electronic switch is connected with the third end of the third electronic switch; the second end of the second electronic switch is respectively connected with the first control module and/or the second control module, and the third end of the second electronic switch is grounded; the first end and the second end of the third electronic switch are both connected with the first chip, and the second end of the third electronic switch is also connected with the first end of the second electronic switch. Through the scheme provided by the embodiment, the disconnection and the connection of the power supply path between the charging unit and the first interface unit can be flexibly controlled.
In a possible design, the charging module further includes a protection unit, the protection unit is connected between the switch unit and the first interface unit, and the protection unit is used for performing overcurrent and overvoltage protection on the external device. Through the scheme provided by the embodiment, the overcurrent or overvoltage damage of the external equipment can be avoided.
In one possible design, the charging module further includes a second interface unit, a rectifying unit, and a converting unit; the second interface unit, the rectifying unit, the converting unit and the charging unit are connected in sequence;
the second interface unit is coupled with a wireless charger, and is used for receiving alternating current transmitted by the wireless charger and transmitting the alternating current to the rectifying unit;
the rectifying unit is used for converting alternating current into direct current and transmitting the direct current to the converting unit;
the conversion unit is used for carrying out voltage reduction and current rise processing on the direct current and transmitting the direct current subjected to the voltage reduction and current rise processing to the charging unit. Through the scheme provided by the embodiment, the received first electric energy can be converted into the voltage requirement suitable for charging the battery to be charged.
In a second aspect, the present application provides a charging chip, which includes the charging circuit of the first aspect.
In a third aspect, the present application provides an electronic device, which includes a battery to be charged and the charging chip of the second aspect.
In a fourth aspect, the present application provides a charging method, comprising:
the charging module receives first electric energy transmitted by a wireless charger and charges a battery to be charged with the first electric energy in a quick charging mode;
detecting whether an external device is plugged with the charging module;
when the external equipment is plugged with the charging module, judging whether the external equipment is a wired charger;
when the external equipment is not a wired charger, the charging module is controlled to keep charging the battery to be charged in a quick charging mode and the power supply path between the charging module and the external equipment is controlled to be disconnected. Through the scheme that this embodiment provided, when the module of charging is treating rechargeable battery and carries out wireless charging with the quick charge mode, when detecting that there is external equipment and the module of charging to peg graft, and external equipment is not wired charger, the module of charging is controlled and is kept charging for treating rechargeable battery with the quick charge mode, thereby can reduce rechargeable battery's the charge time, still control the power supply route disconnection of charging module and external equipment, thereby can avoid external equipment to receive the damage under higher charging voltage.
In a possible design, when the external device is a wired charger, the charging module is controlled to stop receiving the first electric energy transmitted by the wireless charger, and the charging module is controlled to be conducted with a power supply path of the wired charger.
In one possible design, when the external device is not a wired charger, the voltage provided by the battery to be charged is converted into a first voltage to supply power to the external device.
Drawings
Fig. 1 is a schematic structural diagram of a charging circuit according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another charging circuit according to an embodiment of the present disclosure;
fig. 3 is a circuit diagram of a charging circuit according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of another charging circuit provided in the embodiment of the present application;
fig. 5 is a schematic structural diagram of another charging circuit according to an embodiment of the present disclosure;
fig. 6 is a circuit diagram of a first switch circuit provided in an embodiment of the present application;
fig. 7 is a circuit diagram of a second switch circuit provided in the embodiment of the present application;
fig. 8 is a schematic structural diagram of another charging circuit according to an embodiment of the present disclosure.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the embodiments disclosed below.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The charging circuit of the conventional electronic device includes a first charging module and a second charging module, wherein the first charging module is configured to be connected to a battery to be charged, and is configured to receive first electric energy transmitted by a wireless charger, and provide the first electric energy to the battery to be charged, so as to charge the battery to be charged. The wireless charging path and the wired charging path of the electronic equipment are mutually isolated and do not influence each other. When the electronic equipment is wirelessly charged, the slave equipment is plugged with the second charging module, and the wireless charging voltage of the first charging module cannot influence the slave equipment. However, the charging circuit needs a large number of components, and has a complex circuit structure and a large occupied space.
In order to reduce the space occupied by the charging circuit, the charging circuit of the electronic device is gradually developed to adopt one charging module to realize wireless charging and wired charging, and a wireless charging path and a wired charging path are coupled with each other through the charging module and wired charging. When the electronic equipment is in wireless charging, and when the electronic equipment is not plugged with the slave equipment, the charging module charges the battery to be charged in a quick charging mode. When the electronic equipment is in a wireless charging process and the slave equipment is plugged with the charging module, the charging module is switched to a slow charging mode to charge the battery to be charged. The charging power of the fast charging mode is greater than that of the slow charging mode, and the charging voltage of the fast charging mode is greater than that of the slow charging mode. The charging module is switched to a slow charging mode, so that the charging module can be prevented from being conducted with a power supply path of the slave device, the slave device is damaged under a high wireless charging voltage, and the charging time of the electronic device is prolonged.
Referring to fig. 1, an embodiment of the present disclosure provides a charging circuit 100, which includes a charging module 10, a first control module 20, and a second control module 30. The charging module 10 is used to connect with a battery 200 to be charged. The charging module 10 is configured to receive a first power transmitted by the wireless charger and charge the battery 200 to be charged with the first power in a fast charging mode. The first control module 20 is connected to the charging module 10, and the first control module 20 is configured to determine whether the external device 300 is a wired charger when detecting that the external device 300 is plugged into the charging module 10. The first control module 20 is also used for controlling the charging module 10 to keep charging the battery 200 to be charged in the fast charging mode when the external device 300 is not a wired charger. The second control module 30 is connected to the charging module 10, the second control module 30 operates under the first power provided by the charging module 10, and the second control module 30 is configured to control the charging module 10 to disconnect from the power supply path of the external device 300.
It is understood that the first control module 20 is powered by the battery 200 to be charged. The first control module 20 is further configured to detect whether the external device 300 is plugged into the charging module 10. The second control module 30 is powered by the first power received by the charging module 10, and when the charging module 10 stops receiving the first power from the wireless charger, that is, when the battery 200 to be charged stops wireless charging, the second control module 30 is powered off and stops operating.
The charging circuit 100 described above may be used to charge a battery 200 to be charged in an electronic device. The electronic device may be a mobile phone, a palm top computer, a tablet computer, a portable multimedia player, etc. The external device 300 is a wired charger or a slave device. The slave device may be, for example, a headset, a keyboard, a mouse, a sound box, a VR device, a usb disk, etc.
In the charging circuit 100 of the embodiment of the present application, when the charging module 10 wirelessly charges the battery 200 to be charged in the fast charging mode, when the first control module 20 detects that the external device 300 is plugged into the charging module 10, and the external device 300 is not a wired charger, the charging module 10 is controlled to keep charging the battery 200 to be charged in the fast charging mode, thereby reducing the charging time of the battery 200 to be charged, the second control module 30 controls the charging module 10 to be disconnected from the power supply path of the external device 300, thereby preventing the external device 300 from being damaged under a higher charging voltage, and since the second control module 30 operates under the first power supplied by the charging module 10, therefore, the phenomenon that the power supply path between the charging module 10 and the external device 300 cannot be controlled to be disconnected when the electronic device is abnormal in the wireless charging process can be avoided.
The electronic device may further have abnormal conditions such as shutdown or forced restart during the wireless charging process, when the electronic device is in the abnormal conditions, a situation that the disconnection of the power supply path between the charging module 10 and the external device 300 cannot be controlled may occur, which may cause the charging module 10 to provide a higher charging voltage to the external device 300, which may cause the external device 300 to be damaged, the second control module 30 is set to operate under the first electric energy provided by the charging module 10, and thus, as long as the electronic device is wirelessly charged, the second control module 30 may both effectively operate, thereby effectively controlling the disconnection of the power supply path between the charging module 10 and the external device 300.
In one embodiment, the first control module 20 is further configured to control the charging module 10 to stop receiving the first power transmitted by the wireless charger and control the charging module 10 to be conducted with a power supply path of the wired charger when the external device 300 is the wired charger.
It is understood that the wired charger may provide the second power to the battery 200 to be charged through the charging module 10, thereby performing wired charging to the battery 200 to be charged. The charging module 10 stops receiving the first electric energy transmitted by the wireless charger, that is, the charging module 10 stops wirelessly charging the battery 200 to be charged, at this time, the second control module 30 stops working, and the control of the power supply path between the charging module 10 and the external device 300 cannot be realized.
When the external device 300 connected to the charging module 10 is a wired charger, the first control module 20 controls the charging module 10 to stop receiving the first electric energy transmitted by the wireless charger, and controls the power supply path of the charging module 10 and the wired charger to be conducted, so as to prevent the battery 200 to be charged from being charged disorderly, and enable the battery 200 to be charged normally.
In one embodiment, the first control module 20 is further configured to control the charging module 10 to disconnect the power supply path of the external device 300 when the external device 300 is not a wired charger. It is understood that when the external device 300 is not a wired charger, that is, the external device 300 cannot charge the electronic device.
In this embodiment, the disconnection between the charging module 10 and the power supply path of the external device 300 can be controlled by the first control module 20, so that when the electronic device is wirelessly charged, if the external device 300 that is not a wired charger is plugged into the charging module 10, the first control module 20 can increase the guarantee that the power supply path of the charging module 10 is disconnected from the power supply path of the external device 300, that is, the first control module 20 ensures that the disconnection control of the power supply path between the charging module 10 and the external device 300 has a dual guarantee, thereby ensuring the protection of the external electronic device.
Referring to fig. 2, in one embodiment, the charging module 10 includes a first interface unit 11, a charging unit 12, and a switch unit 13. The first interface unit 11 is used for the external device 300 to plug in. The first interface unit 11 may be a USB (Universal Serial Bus) interface, and further, the first interface unit 11 may be a USB Type-C interface. The charging unit 12 is configured to be connected to the battery 200 to be charged, and the charging unit 12 is configured to receive a first power transmitted by the wireless charger and charge the battery 200 to be charged with the first power in a fast charging mode. The charging unit 12 may be a first chip that couples wireless charging and wired charging. The switch unit 13 is connected between the first interface unit 11 and the charging unit 12, and the switch unit 13 is further connected to the second control module 30, and is configured to be controlled by the second control module 30 to disconnect the connection between the first interface unit 11 and the charging unit 12, so as to disconnect a power supply path between the charging unit 12 and the external device 300. The first interface unit 11 is arranged to realize the plugging of the external device 300 and the charging module 10, and the switch unit 13 is arranged to realize the overvoltage protection of the external device 300, so that the control of the power supply path between the charging module 10 and the external device 300 is more effective and reliable.
When the external device 300 is a wired charger, the switch unit 13 is controlled by the first control module 20 to establish a connection between the first interface unit 11 and the charging unit 12.
When the external device 300 is not a wired charger, the switching unit 13 is controlled by the first control module 20 to disconnect the connection between the first interface unit 11 and the charging unit 12.
Further, the switching unit 13 includes a first electronic switch Q1, a second electronic switch Q2, and a third electronic switch Q3. The charging unit 12 includes a first chip U1. A first terminal of the first electronic switch Q1 is connected to the first interface unit 11, a second terminal of the first electronic switch Q1 is connected to a first terminal of the second electronic switch Q2, and a third terminal of the first electronic switch Q1 is connected to a third terminal of the third electronic switch Q3. A second terminal of the second electronic switch Q2 is connected to the first control module 20 and the second control module 30, respectively, and a third terminal of the second electronic switch Q2 is grounded. The first terminal and the second terminal of the third electronic switch Q3 are both connected to the first chip U1, and the second terminal of the third electronic switch Q3 is also connected to the first terminal of the second electronic switch Q2.
Wherein, the first terminal of the first electronic switch Q1 is connected to the first interface unit 11 through the first interface terminal VCHG _ USB _ CON. The first chip U1 includes a voltage input terminal SCHG _ VBUS, and the first terminal of the third electronic switch Q3 is connected to the voltage input terminal SCHG _ VBUS of the first chip U1. A second terminal of the second electronic switch Q2 is connected to the first control module 20 through the port SOC.
Further, the first electronic switch Q1, the second electronic switch Q2, and the third electronic switch Q3 may be NMOS transistors or NPN transistors. When the first electronic switch Q1, the second electronic switch Q2, and the third electronic switch Q3 are MOS transistors, the first terminal, the second terminal, and the third terminal of the first electronic switch Q1, the second electronic switch Q2, and the third electronic switch Q3 respectively correspond to the drain, the gate, and the source of the NMOS transistor. When the first electronic switch Q1, the second electronic switch Q2, and the third electronic switch Q3 are NPN transistors, the first end, the second end, and the third end of the first electronic switch Q1, the second electronic switch Q2, and the third electronic switch Q3 respectively correspond to a collector, a base, and an emitter of the NPN transistor.
The first control module 20 or the second control module 30 can flexibly control the on/off of the power supply path between the charging unit 12 and the first interface unit 11 by controlling the on/off of the switching unit 13.
Further, the charging module 10 further includes a protection unit 14, and the protection unit 14 is connected between the switch unit 13 and the first interface unit 11, and is configured to perform overcurrent and overvoltage protection on the external device 300. The protection unit 14 can prevent overcurrent or overvoltage damage of the external device 300. The protection unit 14 may also be connected between the switching unit 13 and the charging unit 12, and is not limited herein.
The first interface unit 11, the protection unit 14, the switching unit 13, and the charging unit 12 described above constitute a wired charging path of the battery 200 to be charged.
Referring to fig. 4, in one embodiment, the charging module 10 further includes a second interface unit 15, a rectifying unit 16, and a converting unit 17. The second interface unit 15, the rectifying unit 16, the converting unit 17, and the charging unit 12 are connected in sequence. The second interface unit 15 is coupled to the wireless charger 400, and is configured to receive the alternating current transmitted by the wireless charger 400 and transmit the alternating current to the rectifying unit 16. The rectifying unit 16 is configured to convert the alternating current into direct current and transmit the direct current to the converting unit 17. The conversion unit 17 performs a voltage reduction and current increase process on the direct current, and transmits the direct current after the voltage reduction and current increase process to the charging unit 12. In this embodiment, the second interface unit 15, the rectifying unit 16 and the converting unit 17 can convert the received first electric energy into a voltage requirement suitable for charging the battery to be charged.
The second interface unit 15 may be a power receiving coil, which is matched with a power transmitting coil in the wireless charger and may interact with the power transmitting coil of the wireless charger by electric induction, magnetic resonance, or electromagnetic wave. The second interface unit 15 may also comprise a resonant circuit of a capacitor and an inductor.
The rectifying unit 16 may include a rectifying bridge circuit, such as a half-wave rectifying bridge circuit, a full-wave rectifying bridge circuit, or a bridge rectifying bridge circuit. The half-wave rectifier bridge circuit, the full-wave rectifier bridge circuit and the bridge rectifier bridge circuit can be composed of corresponding diodes or thyristors and other devices.
The converting unit 17 may be, for example, a switched capacitor circuit with a ratio of input voltage to output voltage (abbreviated as voltage ratio) of 4:1, and the charging unit 12 may be, for example, a switched capacitor circuit with a ratio of 2: 1. The path voltage drop between the output end of the converting unit 17 and the battery 200 to be charged is the first path voltage drop, the input voltage of the converting unit 17 is the sum of the voltage of the battery 200 to be charged, which is 4 times the voltage of the battery 200 to be charged, and the first path voltage drop, the path voltage drop between the output end of the charging unit 12 and the battery 200 to be charged is the second path voltage drop, and the input voltage of the charging unit 12 is the sum of the voltage of the battery 200 to be charged, which is 2 times the voltage of the battery 200 to be charged, and the second path voltage drop. In some embodiments, it is not limited to the conversion unit 17 being a switched capacitor circuit with a ratio of input voltage to output voltage being 4:1, the charging unit 12 being a switched capacitor circuit with a ratio of input voltage to output voltage being 2:1, and the conversion unit 17 and the charging unit 12 being switched capacitor circuits with other voltage ratios, for example, the charging unit 12 being a Buck converter circuit (Buck circuit), and the conversion unit 17 and the charging unit 12 being other devices capable of reducing voltage and increasing current.
The second interface unit 15, the rectifying unit 16, the converting unit 17, and the charging unit 12 described above constitute a wireless charging path of the battery 200 to be charged. The wired charging path and the wireless charging path share the same charging unit 12.
The first control module 20 may be a main control chip of the electronic device.
The second control module 30 may include a receiving integrated circuit for receiving the first power transmitted from the charging module 10 to operate electrically.
Referring to fig. 5, in one embodiment, the charging circuit 100 further includes a first conversion module 40, the first conversion module 40 is configured to be connected to the battery 200 to be charged and the external device 300, respectively, and the first conversion module 40 is configured to convert a voltage provided by the battery 200 to be charged into a first voltage to supply power to the external device 300 when the external device 300 is not a wired charger. The first conversion module 40 is also connected to the first control module 20. Through the first conversion module 40, the charging circuit 100 can convert the voltage of the battery 200 to be charged into the first voltage suitable for supplying power to the external device 300, so that the external device 300 can be supplied with normal voltage even if the battery 200 to be charged is wirelessly charged.
The first conversion module 40 includes a conversion circuit 41 and a switch circuit 42. The conversion circuit 41 is used for connecting with the battery 200 to be charged, and the conversion circuit 41 is further connected with the first interface unit 11 through the switch circuit 42, that is, one end of the switch circuit 42 is connected with the conversion circuit 41, and the other end is connected between the first interface unit 11 and the switch unit 13.
The conversion circuit 41 may include a Buck or Boost circuit (Buck-Boost circuit), and the conversion circuit 41 may further include a Boost circuit (Boost circuit), and the Boost circuit may specifically be a 5VBoost circuit with an output voltage of 5V. The converting circuit 41 may convert the voltage into a corresponding voltage according to an actual power supply voltage requirement of the external electronic device, and the first voltage may be 4.5V, 5V, 5.5V or other voltages, which is not limited herein.
Referring to fig. 3 again, the charging module 10 includes a first interface unit 11, a switch unit 13 and a charging unit 12, the first interface unit 11 includes a first interface VCHG _ USB _ CON, the switch unit 13 includes a first electronic switch Q1, a second electronic switch Q2 and a third electronic switch Q3, the first electronic switch Q1, the second electronic switch Q2 and the third electronic switch Q3 are all NMOS, the charging unit 12 includes a first chip U1, the second control module 30 includes a receiving integrated circuit U2 and a resistor R1, the first conversion module 40 includes an embodiment of a conversion circuit 41 and a switch circuit 42, and the operation process of the charging circuit is described below.
The first chip U1 is configured to be connected to the battery 200 to be charged, the first end of the first electronic switch Q1 is connected to the first interface VCHG _ USB _ CON, the second end of the first electronic switch Q1 is connected to the first end of the second electronic switch Q2, the third end of the first electronic switch Q1 is connected to the third end of the third electronic switch Q3, the second end of the second electronic switch Q2 is connected to the first control module 20, the third end of the second electronic switch Q2 is grounded, the first end and the second end of the third electronic switch Q3 are both connected to the first chip U1, the second end of the third electronic switch Q3 is further connected to the first end of the second electronic switch Q2, the receiving integrated circuit U2 is connected to the second end of the second electronic switch Q2 through the resistor R1, the conversion circuit 41 is configured to be connected to the battery 200 to be charged, one end of the switch circuit 42 is connected to the conversion circuit 41, and the other end of the first interface VCHG _ USB _ CON is connected to the first interface VCHG _ USB _ CON. The receiving integrated circuit U2 may also be connected to the second terminal of the second electronic switch Q2 through a diode, wherein the anode of the diode is connected to the receiving integrated circuit U2 and the cathode of the diode is connected to the second terminal of the second electronic switch Q2. A first terminal of the third electronic switch Q3 is connected to the voltage input terminal SCHG _ VBUS of the first chip U1. A second terminal of the second electronic switch Q2 is connected to the first control module 20 through the port SOC.
When the charging unit 12 receives the first power transmitted by the wireless charger, that is, when the battery 200 to be charged is wirelessly charged, the output terminal of the receiving integrated circuit U2 outputs a high level to the second terminal of the second electronic switch Q2, the first control module 20 also transmits the high level to the second terminal of the second electronic switch Q2 through the port SOC, the second electronic switch Q2 is turned on, the first electronic switch Q1 and the third electronic switch Q3 are turned off, at this time, the first electronic switch Q1 and the third electronic switch Q3 disconnect the first interface terminal VCHG _ USB _ CON from the voltage input terminal SCHG _ VBUS of the first chip U1, that is, the switching unit 13 disconnects the first interface terminal VCHG _ USB _ CON from the voltage input terminal SCHG _ VBUS of the first chip U1, and the first control module 20 controls the first chip U1 to charge the received first power to the battery 200 to be charged in a fast charging mode. In this embodiment, the fast charging mode is: the input voltage of the voltage input terminal SCHG _ VBUS of the first chip U1 is 9V, and the first chip U1 converts the 9V voltage into a preset voltage to charge the battery 200 to be charged. When the first control module 20 detects that the external device 300 is plugged into the first interface VCHG _ USB _ CON, the first control module 20 determines whether the external device 300 is a wired charger, and when the external device 300 is not a wired charger, the first control module 20 controls the first chip U1 to keep charging the battery 200 to be charged in the fast charging mode. The external device 300 is powered by the first voltage converted by the conversion circuit 41, and the first electronic switch Q1 and the third electronic switch Q3 block a path between the first chip U1 and the external device 300, so that the external device 300 is not damaged by the high voltage (9V) at the input end of the first chip U1. When the electronic device is in an abnormal condition, such as forced shutdown or forced restart, the level signal transmitted from the first control module 20 to the second end of the second electronic switch Q2 is unstable, may be low level or high level, at this time, the receiving integrated circuit U2 normally operates under the first power transmitted by the first chip U1, and keeps outputting high level, so that the first electronic switch Q1 and the third electronic switch Q3 can be controlled to block the path between the first chip U1 and the external device 300, and the external device 300 is prevented from being damaged. If the second control module 30 is not available, the first control module 20 may transmit a low level to the second terminal of the second electronic switch Q2, which causes the first electronic switch Q1 and the third electronic switch Q3 to be turned on, so that the external device 300 is turned on with the power supply path of the first chip U1.
When the external device 300 is a wired charger, the first control module 20 controls the first chip U1 to stop receiving the first power transmitted by the wireless charger and transmit a low level to the second end of the second electronic switch Q2, and the first electronic switch Q1 and the third electronic switch Q3 are turned on, so as to control the conduction of the power supply path between the first chip U1 and the first interface unit 11, at this time, the receiving integrated circuit U2 stops working due to no power supply of the first power, when the receiving integrated circuit U2 does not work, the level at the output end of the receiving integrated circuit U2 is a low level, which is equivalent to the level transmitted by the receiving integrated circuit U2 to the second end of the second electronic switch Q2 is a low level, and the wired charger charges the battery 200 to be charged through the switch unit 13 and the charging unit 12, that is wired charging.
It should be noted that the first control module 20 may be connected to other pins of the first chip U1, and the receiving integrated circuit U2 may also be connected to other pins of the first chip U1. When the level transmitted from the first control module 20 or the receiving ic U2 to the second terminal of the second electronic switch Q2 is high, the second electronic switch Q2 is turned on, and when the level transmitted from the first control module 20 and the receiving ic U2 to the second terminal of the second electronic switch Q2 is low, the second electronic switch Q2 is turned off.
The conversion circuit 41 may include a Buck-Boost circuit and a Boost circuit, and accordingly, the switching circuit 42 may include a first switching circuit 421 and a second switching circuit 422. One end of the Buck-Boost circuit is connected to the battery to be charged, and the other end is connected to the first interface terminal VCHG _ USB _ CON through the first switch circuit 421. One end of the Boost circuit is connected to the battery 200 to be charged, and the other end is connected to the first interface terminal VCHG _ USB _ CON through the second switch circuit 422.
Referring to fig. 6, the first switch circuit 421 includes a first switch S1, a first terminal IN2 of the first switch S1 is connected to the battery 200 to be charged through a connection terminal VBST _5V, a second terminal CTRL of the first switch S1 is connected to the first control module 20 through a connection terminal GPIO _105_ OTG _ EN, a third terminal OUT1 of the first switch S1 is connected to the first interface unit 11 through a first interface terminal VCHG _ USB _ CON, and a fourth terminal FLAG of the first switch S1 is connected to the first control module 20 through a connection terminal GPIO _205_ OTG _ FLAG _ N.
Referring to fig. 7, the second switch circuit 422 includes a second switch S2, a first terminal of the second switch S2 is connected to the first interface unit 11 through a first interface terminal VCHG _ USB _ CON, a second terminal of the second switch S2 is connected to the first control module 20 through a connection terminal GPIO _017_ CHG _ BUCK _ CTRL, and a third terminal of the second switch S2 is connected to the battery 200 to be charged through a connection terminal VDD _ BUCK _ BOOST.
Referring to fig. 8, another charging circuit for charging a battery 500 to be charged is provided in the embodiments of the present application. The charging circuit includes a first interface unit 61, a protection unit 62, a first switching unit 63, a first charging unit 64, a second charging unit 65, a second interface unit 66, a first conversion unit 67, a third charging unit 68, a fourth charging unit 69, a second conversion unit 71, and a second switching unit 72. The first interface unit 61 is used for connecting with an external device. The first interface unit 61, the protection unit 62, the first switch unit 63, the first charging unit 64, and the battery 500 to be charged are sequentially connected to form a first wired charging path. The first interface unit 61, the protection unit 62, the first switch unit 63, the second charging unit 65, and the battery 500 to be charged are sequentially connected to form a second wired charging path. The second interface unit 66 is used for coupling with a wireless charger. The second interface unit 66, the first conversion unit 67, the third charging unit 68 and the battery 500 to be charged are sequentially connected to form a first wireless charging path. The second interface unit 66, the first conversion unit 67, the fourth charging unit 69 and the battery 500 to be charged are connected in sequence to form a second wireless charging path.
The protection unit 62 is used for overcurrent and overvoltage protection of devices connected on the charging path.
The first switching unit 63 is used to establish or disconnect the connection of the first interface unit 61 and the first charging unit 64, or to establish or disconnect the connection of the first interface unit 61 and the second charging unit 65.
The first charging unit 64 is configured to perform a voltage reduction and current increase process on the second power provided by the wired charger, and provide the second power after the voltage reduction and current increase process to the battery 500 to be charged. The voltage is reduced and the current is increased, namely the voltage is reduced and the current is increased. The first charging unit 64 may be a Switched Capacitor (SC) circuit.
The second charging unit 65 is configured to perform a voltage reduction and current increase process on the second electric energy provided by the wired charger, and provide the second electric energy after the voltage reduction and current increase process to the battery 500 to be charged. The second charging unit 65 may be a Buck circuit.
The first conversion unit 67 is configured to perform a voltage reduction and current increase process on the first electric energy received by the second interface unit 66, and generate a processing voltage.
The third charging unit 68 is configured to perform a step-down/step-up process on the processing voltage and supply the processing voltage subjected to the step-down/step-up process to the battery 500 to be charged. The third charging unit 68 may be a switched capacitor circuit.
The fourth charging unit 69 is configured to perform a step-down/step-up process on the processing voltage and supply the processing voltage of the step-down/step-up process to the battery to be charged 500. The fourth charging unit 69 may be a Buck circuit.
One end of the second switch unit 72 is connected between the protection unit 62 and the first switch unit 63, the other end of the second switch unit 72 is connected with the second conversion unit 71, and the second conversion unit 71 is further connected with the battery 500 to be charged.
The second conversion unit 71 is configured to convert the voltage provided by the battery 500 to be charged into a first voltage, so as to supply power to the external device.
The second conversion unit 71 may include a Buck-Boost circuit and a Boost circuit, and accordingly, the second switching unit 72 may include a first switching circuit and a second switching circuit.
The first charging unit 64 and the second charging unit 65 of this embodiment constitute a first charging module, the third charging unit 68 and the fourth charging unit 69 constitute a second charging module, and the first charging module and the second charging module separate the wired charging path and the wireless charging path, so that the wired charging and the wireless charging of the electronic device are not affected by each other.
Embodiments of the present application further provide a charging chip, which includes the charging circuit described in any of the above embodiments.
The embodiment of the application also provides electronic equipment, which comprises a battery to be charged and the charging chip.
The various modules in the electronic device described above may be implemented in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.
An embodiment of the present application further provides a charging method, including:
the charging module receives first electric energy transmitted by the wireless charger and charges the battery to be charged with the first electric energy in a quick charging mode;
detecting whether an external device is plugged with a charging module;
when the external equipment is plugged with the charging module, judging whether the external equipment is a wired charger;
when the external equipment is not the wired charger, the charging module is controlled to keep charging the battery to be charged in the quick charging mode and to be disconnected with the power supply path of the external equipment.
According to the charging method, when the charging module wirelessly charges the battery to be charged in the fast charging mode, and when the external equipment is detected to be plugged with the charging module and the external equipment is not a wired charger, the charging module is controlled to keep charging the battery to be charged in the fast charging mode, so that the charging time of the battery to be charged can be reduced, and the power supply path between the charging module and the external equipment is also controlled to be disconnected, so that the external equipment can be prevented from being damaged under higher charging voltage.
In one embodiment, the charging method further includes, when the external device is a wired charger, controlling the charging module to stop receiving the first electric energy transmitted by the wireless charger, and controlling the charging module to be conducted with a power supply path of the wired charger.
In one embodiment, the charging method further includes converting a voltage provided by the battery to be charged into a first voltage to supply power to the external device when the external device is not a wired charger.
For the specific definition of the charging method, reference may be made to the above definition of the charging circuit, which is not described herein again.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (15)

1. A charging circuit, comprising:
the charging module is used for receiving first electric energy transmitted by a wireless charger and charging the battery to be charged with the first electric energy in a quick charging mode;
the first control module is connected with the charging module and used for judging whether the external equipment is a wired charger or not when the external equipment is detected to be plugged with the charging module;
the first control module is also used for controlling the charging module to keep charging the battery to be charged in a quick charging mode when the external equipment is not a wired charger;
the second control module is connected with the charging module, works under the first electric energy provided by the charging module, and is used for controlling the disconnection of the charging module and a power supply path of the external equipment.
2. The charging circuit of claim 1, wherein the first control module is further configured to control the charging module to disconnect from a power supply path of the external device when the external device is not a wired charger.
3. The charging circuit according to claim 1, wherein the first control module is further configured to control the charging module to stop receiving the first electric energy transmitted by the wireless charger and control the charging module to be conducted with a power supply path of the wired charger when the external device is the wired charger.
4. The charging circuit of claim 1, further comprising:
the first conversion module is used for converting the voltage provided by the battery to be charged into a first voltage to supply power to the external equipment when the external equipment is not a wired charger.
5. The charging circuit of claim 1, wherein the charging module comprises:
the first interface unit is used for plugging the external equipment;
the charging unit is used for receiving first electric energy transmitted by a wireless charger and charging the battery to be charged with the first electric energy in a quick charging mode;
and the switch unit is connected between the first interface unit and the charging unit, is also connected with the second control module and is used for being controlled by the second control module to disconnect the connection between the first interface unit and the charging unit.
6. The charging circuit of claim 5, wherein when the external device is a wired charger, the switching unit is controlled by the first control module to establish a connection between the first interface unit and the charging unit.
7. The charging circuit of claim 5, wherein when the external device is not a wired charger, the switching unit is controlled by the first control module to disconnect the connection between the first interface unit and the charging unit.
8. The charging circuit of claim 5, wherein the switching unit comprises a first electronic switch, a second electronic switch, and a third electronic switch; the charging unit comprises a first chip; the first end of the first electronic switch is connected with the first interface unit, the second end of the first electronic switch is connected with the first end of the second electronic switch, and the third end of the first electronic switch is connected with the third end of the third electronic switch; the second end of the second electronic switch is respectively connected with the first control module and/or the second control module, and the third end of the second electronic switch is grounded; the first end and the second end of the third electronic switch are both connected with the first chip, and the second end of the third electronic switch is also connected with the first end of the second electronic switch.
9. The charging circuit of claim 5, wherein the charging module further comprises a protection unit, the protection unit is connected between the switch unit and the first interface unit, and the protection unit is used for performing overcurrent and overvoltage protection on the external device.
10. The charging circuit of claim 5, wherein the charging module further comprises a second interface unit, a rectifying unit and a converting unit; the second interface unit, the rectifying unit, the converting unit and the charging unit are connected in sequence;
the second interface unit is coupled with a wireless charger, and is used for receiving alternating current transmitted by the wireless charger and transmitting the alternating current to the rectifying unit;
the rectifying unit is used for converting alternating current into direct current and transmitting the direct current to the converting unit;
the conversion unit is used for carrying out voltage reduction and current rise processing on the direct current and transmitting the direct current subjected to the voltage reduction and current rise processing to the charging unit.
11. A charging chip comprising a charging circuit as claimed in any one of claims 1 to 10.
12. An electronic device characterized by comprising a battery to be charged and the charging chip according to claim 11.
13. A method of charging, comprising:
the charging module receives first electric energy transmitted by a wireless charger and charges a battery to be charged with the first electric energy in a quick charging mode;
detecting whether an external device is plugged with the charging module;
when the external equipment is plugged with the charging module, judging whether the external equipment is a wired charger;
when the external equipment is not a wired charger, the charging module is controlled to keep charging the battery to be charged in a quick charging mode and the power supply path between the charging module and the external equipment is controlled to be disconnected.
14. The charging method according to claim 13, further comprising:
when the external equipment is a wired charger, the charging module is controlled to stop receiving the first electric energy transmitted by the wireless charger, and the charging module is controlled to be conducted with a power supply channel of the wired charger.
15. The charging method according to claim 13, further comprising:
and when the external equipment is not a wired charger, converting the voltage provided by the battery to be charged into a first voltage to supply power to the external equipment.
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