CN109787349B - UPS circuit, power supply circuit and electronic equipment - Google Patents
UPS circuit, power supply circuit and electronic equipment Download PDFInfo
- Publication number
- CN109787349B CN109787349B CN201910153893.6A CN201910153893A CN109787349B CN 109787349 B CN109787349 B CN 109787349B CN 201910153893 A CN201910153893 A CN 201910153893A CN 109787349 B CN109787349 B CN 109787349B
- Authority
- CN
- China
- Prior art keywords
- module
- circuit
- power supply
- current
- direct
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a UPS circuit, which is characterized by comprising: the charging and discharging module, the control module and the current path switching module; the charging and discharging module is respectively connected with the current path switching module and the control module, and the control module is connected with the current path switching module; the charging and discharging module is used for connecting the battery module and the direct current power supply module; the charge-discharge module is used for controlling the charge and discharge of the battery module; the current path switching module is used for connecting the mainboard circuit and the direct current voltage reduction module; the direct current voltage reduction module is connected with the direct current power supply module and is used for reducing the direct current high voltage output by the direct current power supply module; the control module controls the power supply mode of the current path switching module so that the UPS circuit works in a corresponding working mode and supplies power to the mainboard circuit. The invention also discloses a power supply circuit and electronic equipment. By adopting the embodiment of the invention, the AC-DC rectifying circuit at the front stage and the DC-AC inverter circuit at the rear stage of the traditional UPS circuit are removed, and the UPS circuit can be adapted to batteries with different specifications.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to a UPS circuit, a power supply circuit and electronic equipment.
Background
UPS (Uninterruptible Power System/Uninterruptible Power Supply), i.e., an Uninterruptible Power Supply, connects a storage battery (mostly a lead-acid maintenance-free storage battery) with a host, and is mainly used for supplying stable and uninterrupted Power to a single computer, a computer network System, or other Power electronic devices such as an electromagnetic valve, a pressure transmitter, etc. The traditional UPS technology generally provides uninterrupted 220V alternating current for power electronic equipment such as an electromagnetic valve, a pressure transmitter and the like; the realization method generally comprises a backup UPS, an online UPS and an online interactive UPS, and the common point of the backup UPS, the online UPS and the online interactive UPS is that alternating current is input, rectified and inverted and then output. The conventional UPS apparatus is connected to the DC input apparatus in a manner shown in fig. 1, and actually performs AC-to-DC conversion, and DC-to-AC conversion.
The traditional UPS circuit is a circuit for realizing alternating current to alternating current, if the UPS circuit is used for direct current input equipment which is increasingly popularized, the UPS circuit needs to be additionally arranged at the input end of a direct current power supply, the efficiency is low, the cost is high, and the volume is large; in addition, the battery in the traditional UPS circuit is embedded in the UPS equipment, so that the maintenance is not facilitated, the user is not facilitated to select and match according to actual requirements, a special battery management chip is used for the battery, the cost is high, parameters are fixed, the battery cannot be matched with batteries of various types and specifications, and the risk exists in the supply process.
Disclosure of Invention
The embodiment of the invention aims to provide a UPS circuit, a power supply circuit and electronic equipment, which are capable of adapting to batteries with different specifications by removing an AC-DC rectification circuit at the front stage and a DC-AC inverter circuit at the rear stage of the traditional UPS circuit.
To achieve the above object, an embodiment of the present invention provides a UPS circuit, including: the charging and discharging module, the control module and the current path switching module; wherein the content of the first and second substances,
the charging and discharging module is respectively connected with the current path switching module and the control module, and the control module is connected with the current path switching module;
the charging and discharging module is used for connecting the battery module and the direct-current power supply module; the charging and discharging module is used for controlling charging and discharging of the battery module and receiving the direct-current high voltage output by the direct-current power supply module;
the current path switching module is used for connecting the mainboard circuit and the direct current voltage reduction module; the direct-current voltage reduction module is connected with the direct-current power supply module and is used for reducing the direct-current high voltage output by the direct-current power supply module so as to output direct-current low voltage;
the control module controls a power supply mode of the current path switching module so that the UPS circuit works in a corresponding working mode and supplies power to the mainboard circuit.
Compared with the prior art, the UPS circuit disclosed by the invention is used for being connected between a direct-current power supply and a mainboard circuit, and an AC-DC rectifying circuit at the front stage and a DC-AC inverter circuit at the rear stage of the traditional UPS circuit are removed, so that the volume and the cost of the UPS are greatly reduced; the battery module is externally arranged, so that a user can select and match proper specifications according to actual requirements, the maintenance is convenient, and the battery module can be adapted to batteries with different specifications; and controlling a power supply mode of the current path switching module through a control module so as to enable the UPS circuit to work in a corresponding working mode and supply power to the mainboard circuit.
As a modification of the above, the operation modes of the UPS circuit include a dc power supply mode, a battery supply mode, and a redundant power supply mode; wherein the content of the first and second substances,
when the UPS circuit works in a direct current power supply mode, the charging and discharging module charges the battery module, and the control module controls the current path switching module to enable the direct current power supply module to supply power to the mainboard circuit through the direct current voltage reduction module;
when the UPS circuit works in a battery power supply mode, the charge-discharge module controls the battery module to discharge, and the control module controls the current path switching module to enable the battery module to supply power to the mainboard circuit;
when the UPS circuit works in a redundant power supply mode, the charging and discharging module reduces the direct-current high voltage output by the direct-current power supply module, and the control module controls the current path switching module to enable the direct-current power supply module to supply power to the mainboard circuit through the charging and discharging module.
As an improvement of the above scheme, the charge and discharge module comprises a Buck module, a first resistor, a second resistor, a first switch and a second switch; wherein the content of the first and second substances,
the Buck module is used for connecting the direct-current power supply module and is used for reducing the direct-current high voltage output by the direct-current power supply module;
the Buck module is connected first resistance and first switch respectively, first resistance is connected the second switch with the second resistance, first switch with the second resistance all is connected the current path switches the module, the second switch is used for connecting the battery module.
As an improvement of the above scheme, the Buck module comprises a power input end, a control signal input end, a power output end, a power control chip, a control circuit, a first capacitor, a second capacitor, a third resistor, a fourth resistor, a fifth resistor and an inductor; wherein the content of the first and second substances,
the power supply input end is respectively connected with an input pin of the power supply control chip and a first end of the first capacitor, and a second end of the first capacitor is grounded;
the first end of the second capacitor is connected with a BOOT pin of the power supply control chip, the second end of the second capacitor is respectively connected with a SW pin of the power supply control chip and the first end of the inductor, and the second end of the inductor is connected with the power supply output end;
the first end of the third resistor is connected with the second end of the inductor, the second end of the third resistor is respectively connected with the FB pin of the power control chip and the first end of the fourth resistor, and the second end of the fourth resistor is grounded;
the first end of the third capacitor is connected with the power output end, and the second end of the third capacitor is grounded;
the input end of the control circuit is connected with the control signal input end, the output end of the control circuit is connected with the second end of the fifth resistor, and the first end of the fifth resistor is connected with the FB pin of the power control chip.
As a modification of the above, the control circuit includes a sixth resistor and a fourth capacitor; wherein the content of the first and second substances,
the first end of the sixth resistor is connected with the input end of the control circuit, and the second end of the sixth resistor is connected with the output end of the control circuit; and the first end of the fourth capacitor is connected with the output end of the control circuit, and the second end of the fourth capacitor is grounded.
As an improvement of the above scheme, the control module is further configured to connect to the motherboard circuit, and the control module is configured to perform data interaction with the motherboard circuit.
In order to achieve the above object, an embodiment of the present invention further provides a power circuit, which includes a dc power module, a dc voltage reduction module, a battery module, and the UPS circuit according to any of the above embodiments; wherein the content of the first and second substances,
the direct current power supply module is respectively connected with the direct current voltage reduction module and the charge-discharge module, the battery module is connected with the charge-discharge module, and the direct current voltage reduction module is connected with the current path switching module.
As a modification of the above, the power supply circuit further includes a DC-DC step-down circuit, a first diode, a second diode, and a third diode; wherein the content of the first and second substances,
the output end of the DC-DC voltage reduction circuit is used for supplying power to the UPS circuit, and the input end of the DC-DC voltage reduction circuit is respectively connected with the cathode of the first diode, the cathode of the second diode and the cathode of the third diode;
the positive electrode of the first diode is connected between the battery module and the charge-discharge module, the positive electrode of the second diode is connected between the charge-discharge module and the current path switching module, and the positive electrode of the third diode is connected between the current path switching module and the direct current step-down module.
As an improvement of the above scheme, the power supply circuit further includes a display module, and the display module is connected to the control module in the UPS circuit.
In order to achieve the above object, an embodiment of the present invention further provides an electronic device, including a motherboard circuit and the power circuit described in any of the above embodiments; wherein, the power supply circuit is connected with the mainboard circuit.
Drawings
FIG. 1 is a schematic diagram of a prior art connection of a UPS device to peripheral circuitry;
fig. 2 is a schematic structural diagram of a UPS circuit 10 according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a power supply path of the UPS circuit 10 operating in a dc power supply mode according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a power supply path of the UPS circuit 10 operating in a battery-powered mode according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a power supply path of the UPS circuit 10 operating in a redundant power supply mode according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a charging and discharging module 1 in a UPS circuit 10 according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a Buck module 11 in the UPS circuit 10 according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of another Buck module 11 in the UPS circuit 10 according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a power supply circuit 20 according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 2, fig. 2 is a schematic structural diagram of a UPS circuit 10 according to an embodiment of the present invention; the method comprises the following steps: the charging and discharging circuit comprises a charging and discharging module 1, a control module 2 and a current path switching module 3; wherein the content of the first and second substances,
the charge-discharge module 1 is respectively connected with the current path switching module 3 and the control module 2, and the control module 2 is connected with the current path switching module 3;
the charge-discharge module 1 is used for connecting the battery module 6 and the direct-current power supply module 4; the charging and discharging module 1 is used for controlling charging and discharging of the battery module 6 and receiving the direct-current high voltage output by the direct-current power supply module 4;
the current path switching module 3 is used for connecting the main board circuit 30 and the direct current voltage reduction module 5; the direct-current voltage reduction module 5 is connected to the direct-current power supply module 4, and the direct-current voltage reduction module 5 is configured to reduce a direct-current high voltage output by the direct-current power supply module 4 to output a direct-current low voltage;
the control module 2 controls a power supply manner of the current path switching module 3, so that the UPS circuit 10 operates in a corresponding operating mode and supplies power to the motherboard circuit 30.
It should be noted that the UPS circuit 10 can be prefabricated in a daughter board directly in the communication device, or can be used as an independent external module for the existing communication device. The dc high voltage output by the dc power module 4 is usually 48V, and needs to be converted into a lower dc voltage (for example, 12V) by the dc voltage dropping module 5 (usually, a dc input OF) for the motherboard circuit 30, the dc high voltage is connected to the input terminal OF the UPS circuit 10 and the dc voltage dropping module 5, and the battery interface OF the UPS circuit 10 is connected to the external battery module 6. The dc low voltage output by the dc voltage dropping module 5 is provided to the UPS circuit 10, so that the UPS circuit 10 outputs the dc low voltage to the motherboard circuit 30.
Preferably, the operation modes of the UPS circuit 10 include a dc power supply mode, a battery supply mode, and a redundant power supply mode; the three operation modes are specifically described below with reference to the drawings:
referring to fig. 3, fig. 3 is a schematic diagram of a power supply path of the UPS circuit 10 according to an embodiment of the present invention when the UPS circuit operates in a dc power supply mode; when the UPS circuit works in a dc power supply mode, the dc power module 4 normally outputs a dc high voltage, the dc high voltage is input to a branch of the UPS circuit 10 and converted into a voltage required by the battery module 6 by the charge-discharge module 1, and the charge-discharge module 1 charges the battery module 6; the direct-current high voltage is further input into the direct-current voltage reduction module 5, the direct-current voltage reduction module 5 reduces the direct-current high voltage to output a direct-current low voltage, and the control module 2 controls the current path switching module 3 to enable the direct-current power supply module 4 to supply power to the main board circuit 30 through the direct-current voltage reduction module 5;
referring to fig. 4, fig. 4 is a schematic diagram of a power supply path of the UPS circuit 10 operating in the battery power mode according to an embodiment of the present invention; when the UPS circuit works in a battery power supply mode, the dc power module 4 cannot normally output a dc high voltage due to a commercial power outage or an equipment failure, the charge-discharge module 1 controls the battery module 6 to discharge, and the control module 2 controls the current path switching module 3 to enable the battery module 6 to supply power to the motherboard circuit 30;
referring to fig. 5, fig. 5 is a schematic diagram of a power supply path of the UPS circuit 10 operating in the redundant power supply mode according to an embodiment of the present invention; when the UPS circuit works in a redundant power supply mode, the dc voltage reduction module 5 cannot normally perform conversion from a dc high voltage to a dc low voltage, and the battery module 6 does not work, so that the charging and discharging module 1 in the UPS circuit 10 realizes a conversion function from a dc high voltage to a dc low voltage, the charging and discharging module 1 reduces the dc high voltage output by the dc power supply module 4 to output a dc low voltage, and the control module 2 controls the current path switching module 3 to enable the dc power supply module 4 to supply power to the motherboard circuit 30 through the charging and discharging module 1.
Further, the control module 2 may be an MCU, and the control module 2 is responsible for controlling the charging and discharging module 1 to charge and discharge the battery module 6, and monitoring information such as voltage, current, and electric quantity of the battery module 6 in real time; the control module 2 is responsible for controlling the working mode of the current path switching circuit 3; the control module 2 is responsible for collecting input voltage and current parameters of the direct current high voltage, output voltage and current parameters of the direct current low voltage, voltage and current of the battery module 6 and other information.
Preferably, referring to fig. 6, fig. 6 is a schematic structural diagram of a charging and discharging module 1 in a UPS circuit 10 according to an embodiment of the present invention; the charging and discharging module 1 comprises a Buck module 11, a first resistor R1, a second resistor R2, a first switch S1 and a second switch S2; wherein the content of the first and second substances,
the Buck module 11 is used for connecting the dc power supply module 4, and the Buck module 11 steps down the dc high voltage output by the dc power supply module 4;
the Buck module 11 is connected to the first resistor R1 and the first switch S1, respectively, the first resistor R1 is connected to the second switch S2 and the second resistor R2, the first switch S1 and the second resistor R2 are both connected to the current path switching module 3, and the second switch S2 is used for connecting to the battery module 6.
Specifically, in the prior art, in a charging and discharging management circuit of a battery, a sampling resistor is connected in series in the circuit, and the voltage at two ends of the resistor is amplified in a certain proportion and then measured, so that current sampling is realized. However, when some special batteries are handled, the difference between the discharge current and the charge current of the battery is large, for example, 100mA is charged, 10A is discharged, and the difference between the charge and the discharge is 100 times, at this time, if a design of sampling resistance and fixed voltage amplification ratio is adopted, the resistance value is extremely difficult or even impossible to realize, and if the resistance is large, great voltage drop and power loss are generated on the resistance when large current is discharged; if the resistance is selected to be smaller, sampling of the small current during charging may be inaccurate. In order to solve the above problem, two sampling resistors (a first resistor R1 and a second resistor R2) are used to separate the charging and discharging loops, wherein the first resistor R1 is used to sample the charging current of the battery module 6, and the second resistor R2 is used to sample the discharging current of the battery module 6.
When the UPS circuit 10 operates in a dc power supply mode (the battery module 6 is charged), the control module 2 controls the first switch S1 to be turned off and the second switch S2 to be turned on, at this time, the dc high voltage output by the dc power supply module 4 passes through the Buck module 11 to charge the battery module 6, the first resistor R1 samples the charging current, and the control module 2 samples the output voltage of the Buck module 11 in real time.
When the UPS circuit 10 operates in the battery-powered mode (the battery module 6 discharges), the control module 2 controls the first switch S1 to be turned off and the second switch S2 to be turned on, at this time, the battery module 6 supplies power to the motherboard circuit 30 through the current path switching module 3, and the second resistor R2 samples a discharge current.
When the UPS circuit 10 operates in a redundant power supply mode (the battery module 6 does not operate), the control module 2 controls the first switch S1 to be turned on, the second switch S2 to be turned off, the first switch S1 is turned on, so that the voltage output by the Buck module 11 is directly transmitted to the current path switching module 3 and finally provided to the rear-stage motherboard circuit 30, the control module 2 directly sets the output voltage value of the Buck module 11 to be the input voltage value required by the motherboard circuit 30 at this time, and the control module 2 further samples the output voltage of the Buck module 11 in real time.
Based on the variable Buck circuit, Buck output voltage sampling, charging current sampling and discharging current sampling, output voltage regulation based on a voltage feedback loop and a current feedback loop can be realized, and the process can realize adaptation of various batteries (lithium batteries, lead-acid batteries and nickel-metal hydride batteries), different charging voltages, different charging currents and different electric quantity batteries of different types only by software regulation algorithm and parameters. Meanwhile, based on the controllable characteristic of the program, advanced functions such as battery maintenance and battery repair can be realized.
Preferably, referring to fig. 7, the Buck module 11 includes a power input terminal IN1, a control signal input terminal IN2, a power output terminal OUT, a power control chip U1, a control circuit 12, a first capacitor C1, a second capacitor C2, a third capacitor C3, a third resistor R3, a fourth resistor R4, a fifth resistor R5, and an inductor L1; wherein the content of the first and second substances,
the power input terminal IN1 is respectively connected to the input pin VIN of the power control chip U1 and the first end of the first capacitor C1, and the second end of the first capacitor C1 is grounded;
a first end of the second capacitor C2 is connected to a BOOT pin of the power control chip U1, a second end of the second capacitor C2 is connected to a SW pin of the power control chip U1 and a first end of the inductor L1, respectively, and a second end of the inductor L2 is connected to the power output terminal OUT;
a first end of the third resistor R3 is connected to a second end of the inductor L1, a second end of the third resistor R3 is connected to the FB pin of the power control chip U1 and the first end of the fourth resistor R4, respectively, and a second end of the fourth resistor R4 is grounded;
a first terminal of the third capacitor C3 is connected to the power output terminal OUT, and a second terminal of the third capacitor R3 is grounded;
the input end IN of the control circuit 12 is connected to the control signal input end IN2, the output end out of the control circuit 12 is connected to the second end of the fifth resistor R5, and the first end of the fifth resistor R5 is connected to the FB pin of the power control chip U1.
The output voltage control principle of the Buck module 11 is that the output voltage VOUT is input to the FB feedback pin of the power control chip U1 after being divided by the third resistor R3 and the fourth resistor R4, and the output voltage VOUT is compared with the reference voltage VREF inside the power control chip U1 to realize closed-loop regulation and ensure that VOUT is output as a stable voltage value. The embodiment of the present invention introduces the control circuit 12 on the basis, that is, a voltage controlled by the control module 2 (input to the control circuit 12 from the control signal input terminal IN 2) is added to the FB feedback pin, so as to realize the indirect real-time control of the output voltage VOUT of the Buck module 11 by the control module 2.
Preferably, the control circuit 12 may be a DAC chip, and the DAC chip outputs a voltage which is superimposed on the original FB feedback node through the fifth resistor R5, so as to affect the voltage of the feedback node, change the set value of VOUT to be output, and by changing the output voltage value of the DAC chip, the VOUT voltage can be set to different values, thereby implementing a Buck circuit with adjustable output.
Preferably, the control circuit 12 is an RC circuit, the control output of the control module 2 is a PWM wave, the control module 2 can change the control voltage superimposed to the FB point by adjusting the positive pulse width of the PWM wave, and the RC circuit is used to realize adjustment, so that the cost is low. Referring to fig. 8, the control circuit 12 includes a sixth resistor R6 and a fourth capacitor C4; wherein the content of the first and second substances,
a first end of the sixth resistor R6 is connected to the input end in of the control circuit 12, and a second end of the sixth resistor R6 is connected to the output end out of the control circuit 12; a first terminal of the fourth capacitor C4 is connected to the output terminal out of the control circuit 12, and a second terminal of the fourth capacitor C4 is connected to ground.
Further, the power control chip U1 may be an output-adjustable chip, and the control module 2 outputs control data, so as to directly control the output voltage of the Buck circuit.
Preferably, the control module 2 is further configured to be connected to the motherboard circuit 20, and the control module 2 is configured to perform data interaction with the motherboard circuit 20. The control module 2 communicates with the motherboard circuit 20 via a general data bus (e.g., I2C, SPI, etc.), and provides the operation information of the UPS circuit 10 to the motherboard circuit 20.
Further, when the main board circuit 20 is a communication device, the UPS circuit 10 may use a standard RJ45 network port to communicate with the main board circuit 20, so that when the main board circuit 20 does not reserve a communication interface for the UPS circuit 10, the general RJ45 on the main board circuit 20 and the UPS circuit 10 can be used to communicate through a network cable connection, thereby enhancing compatibility.
Compared with the prior art, the UPS circuit 10 disclosed by the invention is used for being connected between a direct-current power supply and a mainboard circuit, and an AC-DC rectifying circuit at the front stage and a DC-AC inverter circuit at the rear stage of the traditional UPS circuit are removed, so that the volume and the cost of the UPS are greatly reduced; the charging and discharging module 1 is used for controlling charging and discharging of the battery module 6, the control module 2 directly controls the charging and discharging module 6, the battery is an external battery module 6, a user can select and match proper specifications according to actual requirements, the maintenance is convenient, and the battery module can be adapted to batteries with different specifications; the control module 2 controls the power supply mode of the current path switching module 3, so that the UPS circuit 10 operates in a corresponding operating mode and supplies power to the motherboard circuit 30.
The UPS circuit 10 disclosed by the invention can be directly prefabricated in electronic equipment as an independent UPS board, and can also be used for improving the existing equipment as an independent module, the compatibility is stronger, and the UPS circuit 10 has a redundant power supply working mode and higher reliability. The charge and discharge management circuit directly controlled by the program of the main control chip can be adapted to batteries with different specifications. Can realize high-level functions of battery maintenance, battery repair and the like. The battery is external, and the user can match suitable specification according to actual demand, also convenient maintenance. The communication mode of the UPS board and the mainboard realized by the universal RJ45 interface enables the existing equipment to communicate with the UPS board without circuit modification, and the compatibility is stronger.
Example two
Referring to fig. 9, fig. 9 is a schematic structural diagram of a power circuit 20 according to an embodiment of the present invention; the UPS circuit comprises a direct-current power supply module 4, a direct-current voltage reduction module 5, a battery module 6 and the UPS circuit 10; wherein the content of the first and second substances,
the direct current power supply module 4 is respectively connected with the direct current voltage reduction module 5 and the charge and discharge module 1, the battery module 6 is connected with the charge and discharge module 1, and the direct current voltage reduction module 5 is connected with the current path switching module 3.
For a specific working process of the UPS circuit 10, please refer to the working process of the UPS circuit 10 in one embodiment, which is not described herein again.
Preferably, the power circuit 20 further includes a display module 7, and the display module 7 is connected to the control module 2 in the UPS circuit 10. The control module 2 calculates and processes the voltage and current information, the path switch information, the charging state information, the discharging state information and the like acquired in real time, and is connected to the display module 7 through a display interface for real-time output, wherein the display module 7 can be an LCD or LED screen, and can even be provided with a buzzer alarm module.
It should be noted that the MCU (i.e., the control module 2) and its peripheral circuits in the UPS circuit 10 also need power supply, and a certain initialization process is required due to the built-in program of the MCU, and in order to ensure the reliability of the system, switches in the UPS circuit 10 should be in a default off state during the initialization process of the MCU. In consideration of the current path conditions in various working modes, the stable source of the power supply of the MCU is a problem which is difficult to solve, in the embodiment of the invention, 3 common diode devices are used to match with the wide-voltage input DC-DC voltage reduction circuit 8, so that the problems are solved at extremely low cost, and a stable power supply source can be provided for the MCU and peripheral circuits.
Preferably, the power supply circuit 20 further includes a DC-DC step-down circuit 8, a first diode D1, a second diode D2, and a third diode D3; wherein the content of the first and second substances,
the output end of the DC-DC voltage reduction circuit 8 is used for supplying power to the UPS circuit, and the input end of the DC-DC voltage reduction circuit 8 is respectively connected with the cathode of the first diode D1, the cathode of the second diode D2 and the cathode of the third diode D3;
the anode of the first diode D1 is connected between the battery module 6 and the charge and discharge module 1, the anode of the second diode D2 is connected between the charge and discharge module 1 and the current path switching module 3, and the anode of the third diode D3 is connected between the current path switching module 3 and the dc step-down module 5.
Specifically, the selection of the three power supply points is the key point, and the power supply points are located at the output of the battery module 6, the output of the Buck circuit in the charge-discharge module 1, and the output of the dc voltage reduction module 5. Therefore, no matter which operating mode the UPS circuit 10 operates in, or the UPS circuit 10 is initialized, at least one of the three power supplies is stably powered when each switch in the circuit is off. When a plurality of power supplies are used for supplying power, the highest voltage path supplies power to the DC-DC voltage reduction circuit 8, and the other two paths do not have adverse effects such as current backflow and the like due to the reverse cut-off characteristic of the diode. The DC-DC buck circuit 8 converts this voltage to a DC voltage (typically 3.3V) required by the MCU and peripheral devices. The circuit formed by the DC-DC voltage reduction circuit 8 and the three diodes has low cost, avoids the switching time interval and the output voltage drop risk caused by selecting a current path by adopting a switch switching mode, and has higher reliability.
Compared with the prior art, the power supply circuit 20 disclosed by the embodiment of the invention has a redundant power supply working mode and has higher reliability. The charge and discharge management circuit directly controlled by the program of the main control chip can be adapted to batteries with different specifications. Can realize high-level functions of battery maintenance, battery repair and the like. The battery is external, and the user can match suitable specification according to actual demand, also convenient maintenance. The real-time display interface enables display to be more visual and is more beneficial to maintenance. The power supply switching circuit of the MCU and the peripheral circuit in the circuit is realized by using the diode, zero time switching can be realized, the reliability is high, and the cost is extremely low.
EXAMPLE III
Further, referring to fig. 9, an electronic device according to an embodiment of the present invention further includes a main board circuit 30 and the power circuit 20 according to any of the above embodiments; the power circuit 20 is connected to the motherboard circuit 30.
Preferably, for a specific working process between the power circuit 20 and the motherboard circuit 30, reference is made to the contents described in the first embodiment and the second embodiment, and details are not repeated here.
Compared with the prior art, the electronic equipment disclosed by the invention has a redundant power supply working mode and higher reliability, and the charge and discharge management circuit directly controlled by the program of the main control chip can be adapted to batteries with different specifications. Can realize high-level functions of battery maintenance, battery repair and the like. The battery is external, and the user can match suitable specification according to actual demand, also convenient maintenance. The communication mode of the UPS board and the mainboard realized by the universal RJ45 interface enables the existing equipment to communicate with the UPS board without circuit modification, and the compatibility is stronger. The real-time display interface enables display to be more visual and is more beneficial to maintenance. The power supply switching circuit of the MCU and the peripheral circuit in the circuit is realized by using the diode, zero time switching can be realized, the reliability is high, and the cost is extremely low.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (9)
1. A UPS circuit, comprising: the charging and discharging module, the control module and the current path switching module; wherein the content of the first and second substances,
the charging and discharging module is respectively connected with the current path switching module and the control module, and the control module is connected with the current path switching module;
the charging and discharging module is used for connecting the battery module and the direct-current power supply module; the charging and discharging module is used for controlling charging and discharging of the battery module and receiving the direct-current high voltage output by the direct-current power supply module;
the current path switching module is used for connecting the mainboard circuit and the direct current voltage reduction module; the direct-current voltage reduction module is connected with the direct-current power supply module and is used for reducing the direct-current high voltage output by the direct-current power supply module so as to output direct-current low voltage;
the control module controls a power supply mode of the current path switching module so that the UPS circuit works in a corresponding working mode and supplies power to the mainboard circuit;
the working modes of the UPS circuit comprise a direct current power supply mode, a battery power supply mode and a redundant power supply mode;
when the UPS circuit works in a direct current power supply mode, the charging and discharging module charges the battery module, and the control module controls the current path switching module to enable the direct current power supply module to supply power to the mainboard circuit through the direct current voltage reduction module;
when the UPS circuit works in a battery power supply mode, the charge-discharge module controls the battery module to discharge, and the control module controls the current path switching module to enable the battery module to supply power to the mainboard circuit;
when the UPS circuit works in a redundant power supply mode, the charging and discharging module reduces the direct-current high voltage output by the direct-current power supply module, and the control module controls the current path switching module to enable the direct-current power supply module to supply power to the mainboard circuit through the charging and discharging module.
2. The UPS circuit of claim 1, wherein the charge-discharge module comprises a Buck module, a first resistor, a second resistor, a first switch, and a second switch; wherein the content of the first and second substances,
the Buck module is used for connecting the direct-current power supply module and is used for reducing the direct-current high voltage output by the direct-current power supply module;
the Buck module is connected first resistance and first switch respectively, first resistance is connected the second switch with the second resistance, first switch with the second resistance all is connected the current path switches the module, the second switch is used for connecting the battery module.
3. The UPS circuit of claim 2, wherein the Buck module includes a power input, a control signal input, a power output, a power control chip, a control circuit, a first capacitor, a second capacitor, a third resistor, a fourth resistor, a fifth resistor, and an inductor; wherein the content of the first and second substances,
the power supply input end is respectively connected with an input pin of the power supply control chip and a first end of the first capacitor, and a second end of the first capacitor is grounded;
the first end of the second capacitor is connected with a BOOT pin of the power supply control chip, the second end of the second capacitor is respectively connected with a SW pin of the power supply control chip and the first end of the inductor, and the second end of the inductor is connected with the power supply output end;
the first end of the third resistor is connected with the second end of the inductor, the second end of the third resistor is respectively connected with the FB pin of the power control chip and the first end of the fourth resistor, and the second end of the fourth resistor is grounded;
the first end of the third capacitor is connected with the power output end, and the second end of the third capacitor is grounded;
the input end of the control circuit is connected with the control signal input end, the output end of the control circuit is connected with the second end of the fifth resistor, and the first end of the fifth resistor is connected with the FB pin of the power control chip.
4. The UPS circuit of claim 3, wherein the control circuit comprises a sixth resistor and a fourth capacitor; wherein the content of the first and second substances,
the first end of the sixth resistor is connected with the input end of the control circuit, and the second end of the sixth resistor is connected with the output end of the control circuit; and the first end of the fourth capacitor is connected with the output end of the control circuit, and the second end of the fourth capacitor is grounded.
5. The UPS circuit of claim 1, wherein the control module is further configured to interface with the motherboard circuit, the control module configured to interact with the motherboard circuit.
6. A power supply circuit, comprising a DC power supply module, a DC voltage reduction module, a battery module and the UPS circuit of any one of the above claims 1-5; wherein the content of the first and second substances,
the direct current power supply module is respectively connected with the direct current voltage reduction module and the charge-discharge module, the battery module is connected with the charge-discharge module, and the direct current voltage reduction module is connected with the current path switching module.
7. The power supply circuit according to claim 6, wherein the power supply circuit further comprises a DC-DC step-down circuit, a first diode, a second diode, and a third diode; wherein the content of the first and second substances,
the output end of the DC-DC voltage reduction circuit is used for supplying power to the UPS circuit, and the input end of the DC-DC voltage reduction circuit is respectively connected with the cathode of the first diode, the cathode of the second diode and the cathode of the third diode;
the positive electrode of the first diode is connected between the battery module and the charge-discharge module, the positive electrode of the second diode is connected between the charge-discharge module and the current path switching module, and the positive electrode of the third diode is connected between the current path switching module and the direct current step-down module.
8. The power circuit of claim 6, further comprising a display module coupled to a control module in the UPS circuit.
9. An electronic device comprising a main board circuit and the power supply circuit according to any one of claims 6 to 8; wherein, the power supply circuit is connected with the mainboard circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910153893.6A CN109787349B (en) | 2019-03-01 | 2019-03-01 | UPS circuit, power supply circuit and electronic equipment |
| PCT/CN2019/125884 WO2020177440A1 (en) | 2019-03-01 | 2019-12-17 | Ups circuit, power supply circuit, and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910153893.6A CN109787349B (en) | 2019-03-01 | 2019-03-01 | UPS circuit, power supply circuit and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109787349A CN109787349A (en) | 2019-05-21 |
| CN109787349B true CN109787349B (en) | 2021-04-27 |
Family
ID=66486798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910153893.6A Active CN109787349B (en) | 2019-03-01 | 2019-03-01 | UPS circuit, power supply circuit and electronic equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109787349B (en) |
| WO (1) | WO2020177440A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109787349B (en) * | 2019-03-01 | 2021-04-27 | 普联技术有限公司 | UPS circuit, power supply circuit and electronic equipment |
| CN110768236B (en) * | 2019-11-12 | 2023-09-05 | 腾讯科技（深圳）有限公司 | Dual power management device |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10243577A (en) * | 1997-02-26 | 1998-09-11 | Chubu Hitachi Electric:Kk | Uninterruptible power unit |
| JP2004023975A (en) * | 2002-06-20 | 2004-01-22 | Sony Corp | Power supply device |
| JP4428049B2 (en) * | 2003-12-25 | 2010-03-10 | 株式会社明電舎 | Backup method and apparatus for DC power supply for inverter in elevator |
| CN201590668U (en) * | 2009-10-22 | 2010-09-22 | 中兴通讯股份有限公司 | Charging device for mobile terminal |
| JP6207196B2 (en) * | 2013-03-28 | 2017-10-04 | 株式会社Ｎｔｔファシリティーズ | DC power supply system |
| CN103683442A (en) * | 2013-09-11 | 2014-03-26 | 合肥联信电源有限公司 | An emergency power supply device with an independent safe voltage and a working method thereof |
| CN205791592U (en) * | 2016-05-16 | 2016-12-07 | 广州市漫联电子科技有限公司 | There is the DC UPS identifying function |
| CN107546836B (en) * | 2016-06-23 | 2019-11-26 | 维谛技术有限公司 | A kind of ups power |
| CN205811656U (en) * | 2016-07-15 | 2016-12-14 | 刘亚平 | A kind of dual power supply DC control circuit |
| CN106685063B (en) * | 2016-11-22 | 2019-01-29 | 上海云衡科技有限公司 | Power supply switch circuit |
| CN206259752U (en) * | 2016-12-13 | 2017-06-16 | 日月元科技(深圳)有限公司 | Integrated uninterruptible power supply provider |
| CN106505726B (en) * | 2016-12-20 | 2019-05-03 | 东北电力大学 | DC UPS based on battery and super capacitor |
| CN208028649U (en) * | 2018-02-01 | 2018-10-30 | 深圳市迈迪杰电子科技有限公司 | A kind of alternative power supply circuit |
| CN207977776U (en) * | 2018-04-03 | 2018-10-16 | 河南宏伟电气股份有限公司 | A kind of DC power cabinet |
| CN109130864A (en) * | 2018-07-25 | 2019-01-04 | 江苏力信电气技术有限公司 | Electric car low pressure power-down protection circuit |
| CN109787349B (en) * | 2019-03-01 | 2021-04-27 | 普联技术有限公司 | UPS circuit, power supply circuit and electronic equipment |
-
2019
- 2019-03-01 CN CN201910153893.6A patent/CN109787349B/en active Active
- 2019-12-17 WO PCT/CN2019/125884 patent/WO2020177440A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN109787349A (en) | 2019-05-21 |
| WO2020177440A1 (en) | 2020-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106059335B (en) | Bus control unit and power supply device, power supply adaptor | |
| US8368252B2 (en) | High- and low-power power supply with standby power saving features | |
| US8687392B2 (en) | Power converter with automatic mode switching | |
| US7017055B1 (en) | Hub that can supply power actively | |
| CN108123519B (en) | Power supply switching equipment, control method and device thereof and power supply system | |
| RU2323514C2 (en) | Programmable power converter | |
| CN202721471U (en) | Mobile battery box | |
| CN102843051B (en) | Power supply adaptor | |
| CN103313003B (en) | Readiness control circuit and television set | |
| CN104767252A (en) | Tablet computer | |
| CN109787349B (en) | UPS circuit, power supply circuit and electronic equipment | |
| CN102130488A (en) | Intelligent low power consumption power adapter | |
| CN110515446A (en) | A kind of server and its power supply and power consumption monitoring circuit | |
| CN105529944A (en) | Power adapter and electronic system using same | |
| US10998759B2 (en) | Uninterruptible power supply with DC output | |
| CN101364771B (en) | Single chip controlled power supply apparatus | |
| TWI739064B (en) | Uninterruptible power supply with dc output | |
| CN113525172A (en) | Lithium battery integrated protection plate, power battery pack and electric vehicle | |
| WO2021035404A1 (en) | Charging system and method | |
| CN201054506Y (en) | Fittings for charging or powering the hand-holding device with and without connected external power | |
| CN218497464U (en) | Desk computer power supply | |
| US11658504B2 (en) | Charge circuit, control box and luminaire | |
| CN110247455A (en) | Television set | |
| CN213521389U (en) | Power converter of DV camera | |
| CN218301225U (en) | Power panel card device for online monitoring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220614 Address after: Floor 12-17, unit 1, building 2, No. 466, Xinyu Road, high tech Zone, Chengdu, Sichuan 610000 Patentee after: Chengdu Lianzhou International Technology Co.,Ltd. Address before: 518000 the 1st and 3rd floors of the south section of building 24 and the 1st-4th floor of the north section of building 28, Shennan Road Science and Technology Park, Nanshan District, Shenzhen City, Guangdong Province Patentee before: TP-LINK TECHNOLOGIES Co.,Ltd. |
|
| TR01 | Transfer of patent right |