Power supply protection control circuit of lithium battery protection board tester

Abstract

The utility model discloses a power supply protection control circuit of a lithium battery protection board tester, which relates to the technical field of power supply protection and comprises a power supply module for providing voltage stabilization for the lithium battery protection board tester connected with a test module and providing voltage stabilization for a lithium battery protection board connected with a protection board module through a voltage stabilization module. The lithium battery protection board tester normally monitors the working state of the lithium battery protection board, and the abnormity detection module controls the power transmission module to be powered off when the electric energy output by the voltage stabilization module is overvoltage, controls the voltage reduction module to carry out voltage reduction adjustment processing on the electric energy output by the power supply module in a voltage stabilization mode, and maintains the power supply state of the protection board module. The power supply protection control circuit of the lithium battery protection board tester can improve the detection efficiency of the lithium battery protection board and ensure safe power supply.

Description

Technical Field

[0001] This utility model relates to the field of power protection technology, specifically a power protection control circuit for a lithium battery protection board tester. Background Technology

[0002] A lithium battery protection board tester is a device specifically designed to test the performance of lithium battery protection boards. It simulates the working states of a lithium battery, such as charging, discharging, and resting, to trigger the protection function of the protection board and monitor its response in real time. Key parameters are recorded, and data analysis software generates detailed test reports. In existing technologies, lithium battery protection board testers typically use multiple voltage regulators to regulate the voltage and meet the power requirements of both the tester and the protection board. However, if a power supply abnormality occurs during testing, the testing process cannot continue, thus requiring improvement. Utility Model Content

[0003] This utility model provides a power protection control circuit for a lithium battery protection board tester to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A power protection control circuit for a lithium battery protection board tester includes: a power module, a voltage regulator module, a power transmission module, an anomaly detection module, a step-down module, a protection board module, and a tester module.

[0006] The power module is used to step down and rectify the incoming AC power and output the first power, and to regulate the voltage of the first power and output the second power.

[0007] A voltage regulator module, connected to the power supply module, is used to perform adjustable voltage regulation control on the first electrical energy and output the third electrical energy.

[0008] The anomaly detection module, connected to the voltage regulator module, is used to divide the third electrical energy and output a protection signal when the signal after voltage division exceeds the set overvoltage threshold.

[0009] The power transmission module, connected to the voltage regulator module, protection board module and anomaly detection module, is used to transmit the third power to the protection board module. When a protection signal is received, the transmission of the third power is stopped.

[0010] The step-down module, connected to the power supply module and the fault detection module, is used to adjust the voltage of the second electrical energy and output the fourth electrical energy when a protection signal is received.

[0011] The protection board module, connected to the step-down module, is used to transmit third or fourth electrical energy to the connected lithium battery protection board;

[0012] The tester module, connected to the protection board module and the power supply module, is used to transmit the second electrical energy to the connected lithium battery protection board tester, and to transmit the battery charging and discharging simulation signal provided by the lithium battery protection board tester to the lithium battery protection board connected to the protection board module, and to receive and monitor the electrical status of the lithium battery protection board.

[0013] As a further embodiment of this utility model: the power module includes a power interface, a first transformer, a first rectifier, a first capacitor, a voltage regulator, and a second capacitor; the test instrument module includes a lithium battery protection board test instrument interface.

[0014] Preferably, the first and second ends of the power interface are respectively connected to the first and second ends of the primary side of the first transformer, the first and second ends of the secondary side of the first transformer are respectively connected to the first and second ends of the first rectifier, the third end of the first rectifier is connected to the first input end of the voltage regulator and is connected to the fourth end of the first rectifier, the second input end of the voltage regulator and ground through the first capacitor, and the first output end of the voltage regulator is connected to the power supply end of the lithium battery protection board tester interface and is connected to the second output end of the voltage regulator, the ground end of the lithium battery protection board tester interface and ground through the second capacitor.

[0015] As a further embodiment of this utility model: the voltage regulator module includes a first voltage regulator, a third capacitor, a second diode, a first resistor, and a first potentiometer;

[0016] Preferably, the third terminal of the first voltage regulator is connected to the cathode of the second diode and the third terminal of the first voltage regulator, the second terminal of the first voltage regulator is connected to the anode of the second diode and is connected to one end of the first potentiometer, one end of the third capacitor and the first terminal of the first voltage regulator through the first resistor, and the other end of the first potentiometer and the slider end are both connected to the other end of the third capacitor and the ground terminal.

[0017] As a further embodiment of this utility model: the power transmission module includes a first power transistor, a second resistor, and a third switching transistor; the protection board module includes a lithium battery protection board interface and a fourth capacitor;

[0018] Preferably, the drain of the first power transistor is connected to the second terminal of the first voltage regulator and is connected to the gate of the first power transistor and the collector of the third switching transistor through the second resistor. The base of the third switching transistor is connected to the abnormal detection module. The source of the first power transistor is connected to the power supply terminal of the lithium battery protection board interface and is connected to the emitter of the third switching transistor, the ground terminal and the ground terminal of the lithium battery protection board interface through the fourth capacitor. The first battery terminal, the second battery terminal and the detection terminal of the lithium battery protection board interface are respectively connected to the first battery analog terminal, the second battery analog terminal and the data receiving terminal of the lithium battery protection board tester interface.

[0019] As a further embodiment of this utility model: the step-down module includes a first switching transistor, a second potentiometer, a second switching transistor, and a first diode;

[0020] Preferably, the collector of the first switching transistor is connected to the collector of the second switching transistor and the first output terminal of the voltage regulator; the emitter of the first switching transistor is connected to one end of the second potentiometer and the slider end; the other end of the second potentiometer is connected to the cathode of the first diode and the base of the second switching transistor; the anode of the first diode is grounded; the emitter of the second switching transistor is connected to the power supply terminal of the lithium battery protection board interface; and the base of the first switching transistor is connected to the abnormal detection module.

[0021] As a further improvement of this utility model: the anomaly detection module includes a third resistor, a fourth resistor, a first comparator, and a first reference power supply;

[0022] Preferably, the non-inverting input of the first comparator is connected to one end of the third resistor and grounded through the fourth resistor, the other end of the third resistor is connected to the second end of the first voltage regulator, the inverting input of the first comparator is connected to the first reference power supply, and the output of the first comparator is connected to the base of the first switching transistor and the base of the third switching transistor.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows: The power protection control circuit of the lithium battery protection board tester of this utility model can provide voltage regulation for the lithium battery protection board tester connected to the test module by the power module, and provide voltage regulation for the lithium battery protection board connected to the protection board module by the voltage regulation module, so that the lithium battery protection board tester can normally monitor the working status of the lithium battery protection board. When the power output of the voltage regulation module is over-voltage, the abnormal detection module will control the power transmission module to cut off the power, and control the step-down module to perform voltage reduction regulation on the power output of the power module to maintain the power supply status of the protection board module and improve the detection efficiency of the lithium battery protection board. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic block diagram of the power protection control circuit of a lithium battery protection board tester provided as an example of this utility model.

[0026] Figure 2 A circuit diagram of a power protection control circuit for a lithium battery protection board tester provided as an example of this utility model.

[0027] Figure 3 The connection circuit diagram of the anomaly detection module provided for this utility model embodiment. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In one embodiment, see Figure 1 A power protection control circuit for a lithium battery protection board tester includes: a power module 1, a voltage regulator module 2, a power transmission module 3, an anomaly detection module 4, a step-down module 5, a protection board module 6, and a tester module 7.

[0030] Specifically, power module 1 is used to step down and rectify the incoming AC power and output the first power, and to regulate the first power and output the second power.

[0031] The voltage regulator module 2 is connected to the power supply module 1 and is used to perform adjustable voltage regulation control on the first electrical energy and output the third electrical energy.

[0032] The anomaly detection module 4 is connected to the voltage regulator module 2 and is used to perform voltage division processing on the third electrical energy and output a protection signal when the signal after voltage division is greater than the set overvoltage threshold.

[0033] The power transmission module 3 is connected to the voltage regulator module 2, the protection board module 6 and the anomaly detection module 4. It is used to transmit the third power to the protection board module 6 and stop transmitting the third power when a protection signal is received.

[0034] The step-down module 5, connected to the power supply module 1 and the anomaly detection module 4, is used to perform adjustable step-down processing on the second electrical energy and output the fourth electrical energy when a protection signal is received.

[0035] The protection board module 6 is connected to the step-down module 5 and is used to transmit the third or fourth electrical energy to the connected lithium battery protection board.

[0036] The tester module 7 is connected to the protection board module 6 and the power supply module 1. It is used to transmit the second electrical energy to the connected lithium battery protection board tester, and to transmit the battery charging and discharging simulation signal provided by the lithium battery protection board tester to the lithium battery protection board connected to the protection board module 6, and to receive and monitor the electrical status of the lithium battery protection board.

[0037] In a specific embodiment, the power supply module 1 can be a power circuit composed of a power interface, transformer, rectifier, voltage regulator, etc., which can perform voltage reduction, rectification, filtering, and voltage regulation on the input AC power; the voltage regulation module 2 can be a voltage regulation circuit composed of a voltage regulator, diode, and resistor, which can perform voltage regulation; the power transmission module 3 can be a power transmission circuit composed of a field-effect transistor, resistor, and transistor, which can control the power transmission state; the anomaly detection module 4 can be an anomaly detection circuit composed of a resistor, comparator, reference power supply, etc. Voltage sampling can be performed and the sampled signal can be compared with a set overvoltage threshold. The step-down module 5 can be a step-down circuit composed of transistors, potentiometers and diodes, which can perform step-down regulation of the input power. The protection board module 6 can be a protection board circuit composed of capacitors and lithium battery protection board interface, which can be connected to the lithium battery protection board to realize signal transmission. The tester module 7 can be a tester circuit composed of lithium battery protection board tester interface, which can be connected to the lithium battery protection board tester to simulate lithium battery and realize monitoring of lithium battery protection board.

[0038] In another embodiment, please refer to Figure 1 , Figure 2 and Figure 3 The power module 1 includes a power interface, a first transformer B1, a first rectifier T1, a first capacitor C1, a voltage regulator and a second capacitor C2; the test instrument module 7 includes a lithium battery protection board test instrument interface.

[0039] Specifically, the first and second ends of the power interface are respectively connected to the first and second ends of the primary side of the first transformer B1. The first and second ends of the secondary side of the first transformer B1 are respectively connected to the first and second ends of the first rectifier T1. The third end of the first rectifier T1 is connected to the first input end of the voltage regulator and is connected to the fourth end of the first rectifier T1, the second input end of the voltage regulator and ground through the first capacitor C1. The first output end of the voltage regulator is connected to the power supply end of the lithium battery protection board tester interface and is connected to the second output end of the voltage regulator, the ground end of the lithium battery protection board tester interface and ground through the second capacitor C2.

[0040] In a specific embodiment, the voltage regulation device described above may be composed of a switching power supply circuit; the power supply terminal of the lithium battery protection board tester interface is connected to the power supply terminal of the lithium battery protection board tester.

[0041] Furthermore, the voltage regulator module 2 includes a first voltage regulator IC1, a third capacitor C3, a second diode D2, a first resistor R1, and a first potentiometer RP1;

[0042] Specifically, the third terminal of the first voltage regulator IC1 is connected to the cathode of the second diode D2 and the third terminal of the first voltage regulator IC1. The second terminal of the first voltage regulator IC1 is connected to the anode of the second diode D2 and is connected to one end of the first potentiometer RP1, one end of the third capacitor C3 and the first terminal of the first voltage regulator IC1 through the first resistor R1. The other end of the first potentiometer RP1 and the slider end are both connected to the other end of the third capacitor C3 and the ground terminal.

[0043] In a specific embodiment, the first voltage regulator IC1 can be an LM317 voltage regulator; the first potentiometer RP1 can adjust the electrical energy output by the first voltage regulator IC1.

[0044] Furthermore, the power transmission module 3 includes a first power transistor Q1, a second resistor R2, and a third switching transistor V3; the protection board module 6 includes a lithium battery protection board interface and a fourth capacitor C4;

[0045] Specifically, the drain of the first power transistor Q1 is connected to the second terminal of the first voltage regulator IC1 and is connected to the gate of the first power transistor Q1 and the collector of the third switch transistor V3 through the second resistor R2. The base of the third switch transistor V3 is connected to the abnormal detection module 4. The source of the first power transistor Q1 is connected to the power supply terminal of the lithium battery protection board interface and is connected to the emitter of the third switch transistor V3, the ground terminal and the ground terminal of the lithium battery protection board interface through the fourth capacitor C4. The first battery terminal, the second battery terminal and the detection terminal of the lithium battery protection board interface are respectively connected to the first battery analog terminal, the second battery analog terminal and the data receiving terminal of the lithium battery protection board tester interface.

[0046] In a specific embodiment, the first power transistor Q1 can be an N-channel MOSFET; the third switching transistor V3 can be an NPN transistor; the power supply terminal of the lithium battery protection board interface is connected to the power supply terminal of the lithium battery protection board; the first battery simulation terminal and the second battery simulation terminal of the lithium battery protection board tester interface can transmit the signals provided by the lithium battery protection board tester during lithium battery simulation to the first battery terminal and the second battery terminal of the lithium battery protection board interface, so that the first battery terminal and the second battery terminal of the lithium battery protection board interface can transmit the received signals to the connected lithium battery protection board, so that the lithium battery protection board can perform lithium battery protection control; the detection terminal of the lithium battery protection board interface is used to detect the power response status when the lithium battery protection board is working, and transmit it to the data receiving terminal of the lithium battery protection board tester interface, so that the lithium battery protection board tester can calculate and process the received data.

[0047] Furthermore, the step-down module 5 includes a first switching transistor V1, a second potentiometer RP2, a second switching transistor V2, and a first diode D1;

[0048] Specifically, the collector of the first switching transistor V1 is connected to the collector of the second switching transistor V2 and the first output terminal of the voltage regulator. The emitter of the first switching transistor V1 is connected to one end of the second potentiometer RP2 and the slider end. The other end of the second potentiometer RP2 is connected to the cathode of the first diode D1 and the base of the second switching transistor V2. The anode of the first diode D1 is grounded. The emitter of the second switching transistor V2 is connected to the power supply terminal of the lithium battery protection board interface. The base of the first switching transistor V1 is connected to the abnormal detection module 4.

[0049] In a specific embodiment, both the first switch V1 and the second switch V2 can be N-channel field-effect transistors; the second potentiometer RP2 and the first diode D1 control the conduction state of the second switch V2.

[0050] Furthermore, the anomaly detection module 4 includes a third resistor R3, a fourth resistor R4, a first comparator A1, and a first reference power supply VREF;

[0051] Specifically, the non-inverting input of the first comparator A1 is connected to one end of the third resistor R3 and grounded through the fourth resistor R4. The other end of the third resistor R3 is connected to the second end of the first voltage regulator IC1. The inverting input of the first comparator A1 is connected to the first reference power supply VREF. The output of the first comparator A1 is connected to the base of the first switching transistor V1 and the base of the third switching transistor V3.

[0052] In a specific embodiment, the third resistor R3 and the fourth resistor R4 are used for voltage division sampling; the first comparator A1 can be an LM358 comparator; and the first reference power supply VREF provides an overvoltage threshold.

[0053] In this embodiment, a power protection control circuit for a lithium battery protection board tester includes an AC power input via a power interface. A first transformer B1, a first rectifier T1, and a first capacitor C1 perform voltage reduction, rectification, and filtering to output first electrical energy. This first electrical energy is then regulated by a voltage regulator to output second electrical energy, which powers the lithium battery protection board tester connected to the power supply terminal of the lithium battery protection board tester interface. The first electrical energy is further regulated by a first voltage regulator IC1, a second diode D2, a first resistor R1, a third capacitor C3, and a first potentiometer RP1 to output third electrical energy, which is then transmitted to the lithium battery protection board connected to the power supply terminal of the lithium battery protection board interface via a first power transistor Q1. The first and second battery simulation terminals of the lithium battery protection board tester interface can transmit signals provided by the lithium battery protection board tester during lithium battery simulation to the first and second battery terminals of the lithium battery protection board interface. The lithium battery protection board is then activated. The lithium battery detection and protection process begins. Simultaneously, the detection terminal of the lithium battery protection board interface receives the electrical response status of the lithium battery protection board during operation and transmits it to the data receiving terminal of the lithium battery protection board tester interface. This data is then transmitted to the lithium battery protection board tester, which calculates and processes the received data. The third resistor R3 and the fourth resistor R4 sample the voltage of the third electrical energy output from the first voltage regulator IC1. When the sampled signal exceeds the overvoltage threshold provided by the first reference power supply VREF, the first comparator A1 outputs a protection signal and controls the first switch V1 and the third switch V3 to conduct, while the first power transistor Q1 is cut off. The first switch V1, in conjunction with the second potentiometer RP2, triggers the second switch V2 to conduct and outputs the fourth electrical energy, maintaining the power supply to the power terminal of the lithium battery protection board interface. The voltage of the fourth electrical energy can be controlled to be equal to the voltage of the third electrical energy by adjusting the resistance value of the second potentiometer RP2.

[0054] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0055] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A power protection control circuit for a lithium battery protection board tester, characterized in that, The power protection control circuit of this lithium battery protection board tester includes: a power module, a voltage regulator module, a power transmission module, an anomaly detection module, a step-down module, a protection board module, and a tester module. The power module is used to step down and rectify the incoming AC power and output the first power, and to regulate the first power and output the second power. The voltage regulator module is connected to the power supply module and is used to perform adjustable voltage regulation control on the first electrical energy and output the third electrical energy. The anomaly detection module is connected to the voltage stabilization module and is used to perform voltage division processing on the third electrical energy and output a protection signal when the signal after voltage division is greater than the set overvoltage threshold. The power transmission module is connected to the voltage regulator module, the protection board module and the anomaly detection module, and is used to transmit the third power to the protection board module. When a protection signal is received, the transmission of the third power is stopped. The step-down module is connected to the power supply module and the anomaly detection module, and is used to perform adjustable step-down processing on the second electrical energy and output the fourth electrical energy when a protection signal is received. The protection board module is connected to the step-down module and is used to transmit the third or fourth electrical energy to the connected lithium battery protection board. The tester module is connected to the protection board module and the power supply module. It is used to transmit the second electrical energy to the connected lithium battery protection board tester, and to transmit the battery charging and discharging simulation signal provided by the lithium battery protection board tester to the lithium battery protection board connected to the protection board module, and to receive and monitor the electrical status of the lithium battery protection board.

2. The power protection control circuit of the lithium battery protection board tester according to claim 1, characterized in that, The power module includes a power interface, a first transformer, a first rectifier, a first capacitor, a voltage regulator, and a second capacitor; the test instrument module includes a lithium battery protection board test instrument interface. The first and second ends of the power interface are respectively connected to the first and second ends of the primary side of the first transformer. The first and second ends of the secondary side of the first transformer are respectively connected to the first and second ends of the first rectifier. The third end of the first rectifier is connected to the first input end of the voltage regulator and is connected to the fourth end of the first rectifier, the second input end of the voltage regulator and ground through the first capacitor. The first output end of the voltage regulator is connected to the power end of the lithium battery protection board tester interface and is connected to the second output end of the voltage regulator, the ground end of the lithium battery protection board tester interface and ground through the second capacitor.

3. The power protection control circuit of a lithium battery protection board tester according to claim 2, characterized in that, The voltage regulator module includes a first voltage regulator, a third capacitor, a second diode, a first resistor, and a first potentiometer; The third terminal of the first voltage regulator is connected to the cathode of the second diode and the third terminal of the first voltage regulator. The second terminal of the first voltage regulator is connected to the anode of the second diode and is connected to one end of the first potentiometer, one end of the third capacitor and the first terminal of the first voltage regulator through the first resistor. The other end of the first potentiometer and the slider end are both connected to the other end of the third capacitor and the ground terminal.

4. The power protection control circuit of the lithium battery protection board tester according to claim 3, wherein, The power transmission module includes a first power transistor, a second resistor, and a third switching transistor; the protection board module includes a lithium battery protection board interface and a fourth capacitor. The drain of the first power transistor is connected to the second terminal of the first voltage regulator and is connected to the gate of the first power transistor and the collector of the third switching transistor through the second resistor. The base of the third switching transistor is connected to the abnormal detection module. The source of the first power transistor is connected to the power supply terminal of the lithium battery protection board interface and is connected to the emitter of the third switching transistor, the ground terminal and the ground terminal of the lithium battery protection board interface through the fourth capacitor. The first battery terminal, the second battery terminal and the detection terminal of the lithium battery protection board interface are respectively connected to the first battery analog terminal, the second battery analog terminal and the data receiving terminal of the lithium battery protection board tester interface.

5. The power protection control circuit of a lithium battery protection board tester according to claim 4, wherein, The step-down module includes a first switching transistor, a second potentiometer, a second switching transistor, and a first diode; The collector of the first switching transistor is connected to the collector of the second switching transistor and the first output terminal of the voltage regulator. The emitter of the first switching transistor is connected to one end of the second potentiometer and the slider end. The other end of the second potentiometer is connected to the cathode of the first diode and the base of the second switching transistor. The anode of the first diode is grounded. The emitter of the second switching transistor is connected to the power supply terminal of the lithium battery protection board interface. The base of the first switching transistor is connected to the abnormal detection module.

6. The power protection control circuit of a lithium battery protection board tester according to claim 5, wherein, The anomaly detection module includes a third resistor, a fourth resistor, a first comparator, and a first reference power supply; The non-inverting input of the first comparator is connected to one end of the third resistor and grounded through the fourth resistor. The other end of the third resistor is connected to the second end of the first voltage regulator. The inverting input of the first comparator is connected to the first reference power supply. The output of the first comparator is connected to the base of the first switching transistor and the base of the third switching transistor.

Images