Electric energy automatic adjusting circuit of lithium battery protection board tester

Abstract

The utility model discloses an automatic electric energy adjusting circuit for a lithium battery protection board tester, which relates to the technical field of electric energy adjustment and comprises a first threshold module, and a first voltage threshold and a second voltage threshold can be respectively provided by the first threshold module and the second threshold module, so that when the protection board module does not provide electric energy, the first voltage threshold and the second voltage threshold can be automatically adjusted. The control module controls the discharge control module to carry out discharge control, simulate lithium battery discharge work and supply power to the protection plate module, when the protection plate module provides electric energy, the control module controls the energy storage control module to carry out electric energy consumption and simulate lithium battery energy storage work, and meanwhile the timing module can carry out cycle timing work. The discharge voltage is automatically and regularly adjusted, and the electric energy consumption degree is automatically adjusted when the energy storage work of the lithium battery is simulated. The lithium battery protection board tester electric energy automatic adjusting circuit improves battery simulation efficiency and intelligence, and reduces manpower resource consumption.

Description

Technical Field

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

[0002] The lithium battery protection board tester can evaluate the performance of a battery by simulating its working state and monitoring the response of the protection board in real time. It has a built-in battery simulation circuit that can simulate various working states of the battery, such as charging, discharging, and resting, and trigger the protection function of the protection board. However, in the existing technology, the built-in battery simulation circuit requires manual parameter adjustment and cannot automatically adjust the charging and discharging level according to the simulated battery state, so it needs to be improved. Utility Model Content

[0003] This utility model embodiment provides an automatic power adjustment 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] An automatic power adjustment circuit for a lithium battery protection board tester includes: a power supply module, a first threshold module, a timing module, a discharge control module, a second threshold module, an energy storage control module, and a protection board module.

[0006] The power module is used to connect to DC power.

[0007] The first threshold module is connected to the power supply module and is used to receive DC power and set the first voltage threshold.

[0008] The timing module is connected to the power supply module. It is used to receive DC power and set a first timing time and a second timing time. It outputs a first control signal during the first timing time and a second control signal during the second timing time, and cyclically outputs the first control signal and the second control signal.

[0009] The discharge control module is connected to the timing module, the first threshold module, and the second threshold module. It is used to output a discharge signal and regulate and transmit DC power when the second voltage threshold output by the second threshold module is less than the first voltage threshold.

[0010] The second threshold module is connected to the timing module and is used to receive electrical energy transmitted by the discharge control module or electrical energy provided by the protection board module. When the first control signal and the discharge signal are received, the second voltage threshold is set, and when the second control signal is received, the voltage value of the second voltage threshold is adjusted.

[0011] The energy storage control module, along with the protection board module, the first threshold module, the timing module, and the second threshold module, intercepts the second voltage threshold when it is greater than the first voltage threshold and receives the first control signal. It consumes the power provided by the protection board module and adjusts the energy consumption level when it receives the second control signal.

[0012] The protection board module, connected to the discharge control module, is used to connect to the lithium battery protection board and receive and provide electrical energy from the discharge control module.

[0013] As a further embodiment of this utility model: the power module includes a power interface and a first capacitor; the first threshold module includes a first resistor, a first Zener diode, a second capacitor, a second resistor, a third resistor, and a twelfth resistor;

[0014] Preferably, the first end of the power interface is connected to one end of the first capacitor and is connected to the cathode of the first voltage regulator, one end of the second capacitor, and one end of the second resistor through the first resistor. The other end of the second capacitor is connected to the other end of the second resistor, the control terminal of the first voltage regulator, and the first end of the twelfth resistor and is connected to the anode of the first voltage regulator, the other end of the first capacitor, the second end of the power interface, and the ground terminal through the third resistor.

[0015] As a further embodiment of this utility model: the discharge control module includes a first comparator, a third switching transistor, a ninth resistor, a first power transistor, a first diode, a third capacitor, and a tenth resistor; the protection board module includes a lithium battery protection board interface;

[0016] Preferably, the non-inverting input of the first comparator is connected to the second terminal of the twelfth resistor, the output terminal of the first comparator is connected to the base of the third switching transistor, the emitter of the third switching transistor is connected to one end of the third capacitor and the ground terminal of the lithium battery protection board interface, the pin of the third switching transistor is connected to the gate of the first power transistor and connected to the first terminal of the power interface and the drain of the first power transistor through the ninth resistor, the source of the first power transistor is connected to the anode of the first diode, and the cathode of the first diode is connected to the other end of the third capacitor and connected to the power terminal of the lithium battery protection board interface through the tenth resistor.

[0017] As a further embodiment of this utility model: the second threshold module includes a first switching transistor, a second switching transistor, a fourth resistor, a fifth resistor, a seventh resistor, a third logic chip, and a fourth logic chip;

[0018] Preferably, the collector of the first switching transistor is connected to the collector of the second switching transistor and the inverting terminal of the first comparator, and is connected to the cathode of the first diode through a seventh resistor. The emitter of the first switching transistor is connected to one end of a fifth resistor and ground through a fourth resistor. The other end of the fifth resistor is connected to the emitter of the second switching transistor. The base of the first switching transistor is connected to the Y terminal of the third logic chip. The base of the second switching transistor is connected to the Y terminal of the fourth logic chip. The A terminals of the third and fourth logic chips are connected to a timing module. The B terminal of the third logic chip is connected to the B terminal of the fourth logic chip and the output terminal of the first comparator.

[0019] As a further embodiment of this utility model: the energy storage control module includes a second comparator, a second diode, a first logic chip, a second logic chip, a fourth switch, a fifth switch, an eighth resistor, and a sixth resistor;

[0020] Preferably, the collector of the fourth switch is connected to one end of the eighth resistor, the collector of the fifth switch is connected to the other end of the eighth resistor and the cathode of the first diode through the sixth resistor, the emitters of the fourth and fifth switches are both grounded, the bases of the fourth and fifth switches are respectively connected to the Y-terminals of the first and second logic chips, the B-terminals of the first and second logic chips are connected to the timing module, the A-terminal of the first logic chip is connected to the output of the second comparator, the anode of the second diode and the A-terminal of the second logic chip, the inverting and non-inverting terminals of the second comparator are respectively connected to the second end of the twelfth resistor and the collector of the first switch, and the cathode of the second diode is connected to the base of the second switch.

[0021] As a further embodiment of this utility model: the timing module includes a third diode, a fourth diode, an eleventh resistor, a first potentiometer, a second potentiometer, a fourth capacitor, a fifth capacitor, a first timer, and a first inverter;

[0022] Preferably, the cathode of the third diode is connected to the anode of the fourth diode and the seventh terminal of the first timer, and is connected to the first terminal of the power interface, the fourth terminal and the eighth terminal of the first timer through the eleventh resistor. The anode of the third diode is connected to one terminal of the first potentiometer, and the cathode of the fourth diode is connected to one terminal of the second potentiometer. The other terminal of the first potentiometer is connected to the slider terminal of the first potentiometer, the other terminal of the second potentiometer, the slider terminal of the second potentiometer, the second terminal and the sixth terminal of the first timer, and is connected to the first terminal of the first timer, one terminal of the fifth capacitor and the second terminal of the power interface through the fourth capacitor. The other terminal of the fifth capacitor is connected to the fifth terminal of the first timer. The third terminal of the first timer is connected to the B terminal of the first logic chip and the A terminal of the fourth logic chip. The output terminal of the first inverter is connected to the A terminal of the third logic chip and the B terminal of the second logic chip.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows: The automatic power adjustment circuit of the lithium battery protection board tester of this utility model can be provided by the first threshold module and the second threshold module respectively, so that when the protection board module does not provide power, the discharge control module is controlled to perform discharge control to simulate the discharge of lithium battery and supply power to the protection board module. When the protection board module provides power, the energy storage control module is controlled to consume power to simulate the energy storage of lithium battery. At the same time, the timing module can perform cyclic timing operation, and then automatically adjust the discharge voltage during the simulated lithium battery discharge operation and automatically adjust the degree of power consumption during the simulated lithium battery energy storage operation, thereby improving the battery simulation efficiency and intelligence and reducing human resource consumption. 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 principle of an automatic power adjustment circuit for a lithium battery protection board tester, which is provided as an example of this utility model.

[0026] Figure 2 The circuit diagram of an automatic power adjustment 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 timing 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 An automatic power adjustment circuit for a lithium battery protection board tester includes: a power supply module 1, a first threshold module 2, a timing module 3, a discharge control module 4, a second threshold module 5, an energy storage control module 6, and a protection board module 7.

[0030] Specifically, power module 1 is used to connect to DC power;

[0031] The first threshold module 2 is connected to the power module 1 and is used to receive DC power and set the first voltage threshold.

[0032] The timing module 3 is connected to the power supply module 1 and is used to receive DC power and set a first timing time and a second timing time. It outputs a first control signal during the first timing time and a second control signal during the second timing time, and cyclically outputs the first control signal and the second control signal.

[0033] The discharge control module 4 is connected to the timing module 3, the first threshold module 2, and the second threshold module 5. It is used to output a discharge signal and perform DC power regulation and transmission processing when the second voltage threshold output by the second threshold module 5 is less than the first voltage threshold.

[0034] The second threshold module 5 is connected to the timing module 3. It is used to receive electrical energy transmitted by the discharge control module 4 or electrical energy provided by the protection board module 7. When it receives the first control signal and the discharge signal, it sets the second voltage threshold and adjusts the voltage value of the second voltage threshold when it receives the second control signal.

[0035] The energy storage control module 6, together with the protection board module 7, the first threshold module 2, the timing module 3, and the second threshold module 5, intercepts the second voltage threshold when it is greater than the first voltage threshold and receives the first control signal. When it receives the second control signal, it consumes the power provided by the protection board module 7 and adjusts the energy consumption level.

[0036] The protection board module 7 is connected to the discharge control module 4 and is used to connect to the lithium battery protection board and receive and provide electrical energy from the discharge control module 4.

[0037] In a specific embodiment, the power module 1 can be a power circuit composed of a power interface and a capacitor, which can be connected to DC power; the first threshold module 2 can be a first threshold circuit composed of an adjustable Zener diode, a capacitor, and a resistor, which can provide a first voltage threshold, which is the maximum charging voltage provided by the protection board module 7; the timing module 3 can be a timing circuit composed of diodes, timers, inverters, etc., which can set a first timing time and a second timing time, and cyclically provide a high-level signal; the discharge control module 4 can be a discharge control circuit composed of comparators, transistors, field-effect transistors, etc., which can perform voltage comparison and discharge control; the second threshold module 5 can be a second threshold circuit composed of a logic chip, a transistor, and a resistor, which can perform logic calculations and set a second voltage. The threshold voltage and the voltage value of the second voltage threshold are determined by the voltage division degree and the electrical energy output by the protection board module 7 or the discharge control module 4. When determined by the voltage division degree and the electrical energy output by the protection board module 7, the second voltage threshold is greater than the first voltage threshold. When determined by the voltage division degree and the electrical energy output by the discharge control module 4, the first voltage threshold is greater than the second voltage threshold. The energy storage control module 6 can be an energy storage control circuit composed of resistors, logic chips, comparators, etc., which can perform voltage comparison, logic calculation, and energy consumption, and adjust the degree of energy consumption. The protection board module 7 can be a protection board circuit composed of a lithium battery protection board interface, which can be connected to the lithium battery protection board to provide electrical energy to the lithium battery protection board and receive electrical energy provided by the lithium battery protection board, simulating the charging and discharging operation of the lithium battery.

[0038] In another embodiment, please refer to Figure 1 , Figure 2 and Figure 3 The power module 1 includes a power interface and a first capacitor C1; the first threshold module 2 includes a first resistor R1, a first Zener diode U1, a second capacitor C2, a second resistor R2, a third resistor R3 and a twelfth resistor R12.

[0039] Specifically, the first end of the power interface is connected to one end of the first capacitor C1 and, through the first resistor R1, to the cathode of the first voltage regulator, one end of the second capacitor C2, and one end of the second resistor R2. The other end of the second capacitor C2 is connected to the other end of the second resistor R2, the control terminal of the first voltage regulator U1, and the first end of the twelfth resistor R12 and, through the third resistor R3, to the anode of the first voltage regulator U1, the other end of the first capacitor C1, the second end of the power interface, and the ground terminal.

[0040] In a specific embodiment, the first Zener diode U1 can be a TL431 Zener diode.

[0041] Furthermore, the discharge control module 4 includes a first comparator A1, a third switch V3, a ninth resistor R9, a first power transistor Q1, a first diode D1, a third capacitor C3, and a tenth resistor R10; the protection board module 7 includes a lithium battery protection board interface.

[0042] Specifically, the non-inverting input of the first comparator A1 is connected to the second terminal of the twelfth resistor R12. The output terminal of the first comparator A1 is connected to the base of the third switching transistor V3. The emitter of the third switching transistor V3 is connected to one end of the third capacitor C3 and the ground terminal of the lithium battery protection board interface. The pin of the third switching transistor V3 is connected to the gate of the first power transistor Q1 and, through the ninth resistor R9, to the first terminal of the power interface and the drain of the first power transistor Q1. The source of the first power transistor Q1 is connected to the anode of the first diode D1. The cathode of the first diode D1 is connected to the other end of the third capacitor C3 and, through the tenth resistor R10, to the power terminal of the lithium battery protection board interface.

[0043] In a specific embodiment, the first comparator A1 can be an LM358 comparator; the third switch V3 can be an NPN transistor; the first power transistor Q1 can be an N-channel MOSFET; the power terminal of the lithium battery protection board interface is the input or output port of the lithium battery protection board when charging and discharging; and the tenth resistor R10 can be used as the internal resistance of the lithium battery when simulating a lithium battery.

[0044] Furthermore, the second threshold module 5 includes a first switch V1, a second switch V2, a fourth resistor R4, a fifth resistor R5, a seventh resistor R7, a third logic chip J3, and a fourth logic chip J4.

[0045] Specifically, the collector of the first switching transistor V1 is connected to the collector of the second switching transistor V2 and the inverting terminal of the first comparator A1, and is connected to the cathode of the first diode D1 through the seventh resistor R7. The emitter of the first switching transistor V1 is connected to one end of the fifth resistor R5 and ground through the fourth resistor R4. The other end of the fifth resistor R5 is connected to the emitter of the second switching transistor V2. The base of the first switching transistor V1 is connected to the Y terminal of the third logic chip J3. The base of the second switching transistor V2 is connected to the Y terminal of the fourth logic chip J4. The A terminals of the third logic chip J3 and the fourth logic chip J4 are connected to the timing module 3. The B terminal of the third logic chip J3 is connected to the B terminal of the fourth logic chip J4 and the output terminal of the first comparator A1.

[0046] In a specific embodiment, both the first switch V1 and the second switch V2 can be NPN transistors; both the third logic chip J3 and the fourth logic chip J4 can be AND gate chips; and the resistance values ​​of the fourth resistor R4 and the fifth resistor R5 are different.

[0047] Furthermore, the energy storage control module 6 includes a second comparator A2, a second diode D2, a first logic chip J1, a second logic chip J2, a fourth switch V4, a fifth switch V5, an eighth resistor R8, and a sixth resistor R6;

[0048] Specifically, the collector of the fourth switch V4 is connected to one end of the eighth resistor R8, the collector of the fifth switch V5 is connected to the other end of the eighth resistor R8 and the cathode of the first diode D1 through the sixth resistor R6, the emitters of the fourth switch V4 and the fifth switch V5 are both grounded, the bases of the fourth switch V4 and the fifth switch V5 are respectively connected to the Y terminal of the first logic chip J1 and the Y terminal of the second logic chip J2, the B terminal of the first logic chip J1 and the B terminal of the second logic chip J2 are connected to the timing module 3, the A terminal of the first logic chip J1 is connected to the output terminal of the second comparator A2, the anode of the second diode D2 and the A terminal of the second logic chip J2, the inverting terminal and the non-inverting terminal of the second comparator A2 are respectively connected to the second end of the twelfth resistor R12 and the collector of the first switch V1, and the cathode of the second diode D2 is connected to the base of the second switch V2.

[0049] In a specific embodiment, the second comparator A2 can be an LM358 comparator; the first logic chip J1 and the second logic chip J2 can both be AND gate chips; the fourth switch V4 and the fifth switch V5 can both be NPN transistors; and the resistance values ​​of the eighth resistor R8 and the sixth resistor R6 are different.

[0050] Furthermore, the timing module 3 includes a third diode D3, a fourth diode D4, an eleventh resistor R11, a first potentiometer RP1, a second potentiometer RP2, a fourth capacitor C4, a fifth capacitor C5, a first timer IC1, and a first inverter INV1;

[0051] Specifically, the cathode of the third diode D3 is connected to the anode of the fourth diode D4 and the seventh terminal of the first timer IC1, and is connected to the first terminal of the power interface, the fourth terminal and the eighth terminal of the first timer IC1 through the eleventh resistor R11. The anode of the third diode D3 is connected to one terminal of the first potentiometer RP1. The cathode of the fourth diode D4 is connected to one terminal of the second potentiometer RP2. The other terminal of the first potentiometer RP1 is connected to the slider terminal of the first potentiometer RP1, the other terminal of the second potentiometer RP2, the slider terminal of the second potentiometer RP2, the second terminal and the sixth terminal of the first timer IC1, and is connected to the first terminal of the first timer IC1 through the fourth capacitor C4. One terminal of the fifth capacitor C5 is connected to the second terminal of the power interface. The other terminal of the fifth capacitor C5 is connected to the fifth terminal of the first timer IC1. The third terminal of the first timer IC1 is connected to the B terminal of the first logic chip J1 and the A terminal of the fourth logic chip J4. The output terminal of the first inverter INV1 is connected to the A terminal of the third logic chip J3 and the B terminal of the second logic chip J2.

[0052] In a specific embodiment, the first timer IC1 can be an NE555 chip; the first inverter INV1 can be a NOT gate chip; the third resistor R3 and the first potentiometer RP1 can be set to a first timing period, and the fourth diode D4 and the second potentiometer RP2 can be set to a second timing period.

[0053] In this embodiment, an automatic power adjustment circuit for a lithium battery protection board tester allows DC power from the tester to be connected via a power interface. The first timer IC1 is powered on and begins timing operation. During the first timing period, the third terminal of the first timer IC1 outputs a first control signal, causing the B terminal of the first logic chip J1 and the A terminal of the fourth logic chip J4 to go high. After the first timing period ends, the third terminal of the first timer IC1, in conjunction with the first inverter INV1, outputs a second control signal during the second timing period, controlling the A terminal of the third logic chip J3 and the B terminal of the second logic chip J2 to go high. A first voltage threshold is set by the first Zener diode U1 in conjunction with the first resistor R1, the second capacitor C2, the second resistor R2, the third resistor R3, and the twelfth resistor R12. During the first timing period, if the lithium battery protection board connected to the interface does not provide power, the first comparator A1... The output is high, controlling the third switch V3 to conduct, controlling the first power transistor Q1 to conduct, and controlling the A terminals of the fourth logic chip J4 and the third logic chip J3 to become high. At this time, the B terminal of the fourth logic chip J4 will trigger the second switch V2 to conduct, and the fifth resistor R5 and the seventh resistor R7 will set the second voltage threshold. During the second timing period, the third logic chip J3 will control the first switch V1 to conduct, and the fourth resistor R4 and the seventh resistor R7 will set the second voltage threshold, thereby adjusting the discharge voltage. During the first timing period, when the lithium battery protection board connected to the lithium battery protection board interface provides power, the second comparator A2 will output a high level, and the first logic chip J1 will trigger the fourth switch V4 to conduct, and the eighth resistor R8 will handle the power consumption. During the second timing period, the second logic chip J2 will trigger the fifth switch V5 to turn on, and the sixth resistor R6 will handle the power consumption, changing the power consumption level.

[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. An automatic power adjustment circuit for a lithium battery protection board tester, characterized in that, The automatic power adjustment circuit of the lithium battery protection board tester includes: a power supply module, a first threshold module, a timing module, a discharge control module, a second threshold module, an energy storage control module, and a protection board module. The power module is used to connect to DC power. The first threshold module is connected to the power supply module and is used to receive DC power and set a first voltage threshold. The timing module is connected to the power supply module and is used to receive DC power and set a first timing time and a second timing time. During the first timing time, it outputs a first control signal and during the second timing time, it outputs a second control signal and cyclically outputs the first control signal and the second control signal. The discharge control module is connected to the timing module, the first threshold module, and the second threshold module. It is used to output a discharge signal and perform DC power regulation and transmission processing when the second voltage threshold output by the second threshold module is less than the first voltage threshold. The second threshold module is connected to the timing module and is used to receive electrical energy transmitted by the discharge control module or electrical energy provided by the protection board module. When the first control signal and the discharge signal are received, the second voltage threshold is set, and when the second control signal is received, the voltage value of the second voltage threshold is adjusted. The energy storage control module intercepts the protection board module, the first threshold module, the timing module, and the second threshold module. It is used to consume the power provided by the protection board module when the second voltage threshold is greater than the first voltage threshold and a first control signal is received. When a second control signal is received, it adjusts the energy consumption level. The protection board module is connected to the discharge control module and is used to connect to the lithium battery protection board, receive electrical energy transmitted by the discharge control module, and provide electrical energy.

2. The automatic power adjustment circuit of the lithium battery protection board tester according to claim 1, characterized in that, The power module includes a power interface and a first capacitor; the first threshold module includes a first resistor, a first Zener diode, a second capacitor, a second resistor, a third resistor, and a twelfth resistor; The first end of the power interface is connected to one end of the first capacitor and is connected to the cathode of the first voltage regulator, one end of the second capacitor, and one end of the second resistor through the first resistor. The other end of the second capacitor is connected to the other end of the second resistor, the control terminal of the first voltage regulator, and the first end of the twelfth resistor and is connected to the anode of the first voltage regulator, the other end of the first capacitor, the second end of the power interface, and the ground terminal through the third resistor.

3. The automatic power adjustment circuit of the lithium battery protection board tester according to claim 2, characterized in that, The discharge control module includes a first comparator, a third switching transistor, a ninth resistor, a first power transistor, a first diode, a third capacitor, and a tenth resistor; the protection board module includes a lithium battery protection board interface. The non-inverting input of the first comparator is connected to the second terminal of the twelfth resistor. The output terminal of the first comparator is connected to the base of the third switching transistor. The emitter of the third switching transistor is connected to one end of the third capacitor and the ground terminal of the lithium battery protection board interface. The pin of the third switching transistor is connected to the gate of the first power transistor and, through the ninth resistor, to the first terminal of the power interface and the drain of the first power transistor. The source of the first power transistor is connected to the anode of the first diode. The cathode of the first diode is connected to the other end of the third capacitor and, through the tenth resistor, to the power terminal of the lithium battery protection board interface.

4. The automatic power adjustment circuit of the lithium battery protection board tester according to claim 3, characterized in that, The second threshold module includes a first switch, a second switch, a fourth resistor, a fifth resistor, a seventh resistor, a third logic chip, and a fourth logic chip; The collector of the first switching transistor is connected to the collector of the second switching transistor and the inverting terminal of the first comparator, and is connected to the cathode of the first diode through the seventh resistor. The emitter of the first switching transistor is connected to one end of the fifth resistor and ground through the fourth resistor. The other end of the fifth resistor is connected to the emitter of the second switching transistor. The base of the first switching transistor is connected to the Y terminal of the third logic chip. The base of the second switching transistor is connected to the Y terminal of the fourth logic chip. The A terminals of the third and fourth logic chips are connected to the timing module. The B terminal of the third logic chip is connected to the B terminal of the fourth logic chip and the output terminal of the first comparator.

5. The automatic power adjustment circuit of the lithium battery protection board tester according to claim 4, characterized in that, The energy storage control module includes a second comparator, a second diode, a first logic chip, a second logic chip, a fourth switch, a fifth switch, an eighth resistor, and a sixth resistor; The collector of the fourth switch is connected to one end of the eighth resistor. The collector of the fifth switch is connected to the other end of the eighth resistor and the cathode of the first diode through the sixth resistor. The emitters of the fourth and fifth switches are both grounded. The bases of the fourth and fifth switches are connected to the Y terminals of the first and second logic chips, respectively. The B terminals of the first and second logic chips are connected to the timing module. The A terminal of the first logic chip is connected to the output terminal of the second comparator, the anode of the second diode, and the A terminal of the second logic chip. The inverting and non-inverting terminals of the second comparator are connected to the second end of the twelfth resistor and the collector of the first switch, respectively. The cathode of the second diode is connected to the base of the second switch.

6. The automatic power adjustment circuit of the lithium battery protection board tester according to claim 5, characterized in that, The timing module includes a third diode, a fourth diode, an eleventh resistor, a first potentiometer, a second potentiometer, a fourth capacitor, a fifth capacitor, a first timer, and a first inverter; The cathode of the third diode is connected to the anode of the fourth diode and the seventh terminal of the first timer, and is connected to the first terminal of the power interface, the fourth terminal and the eighth terminal of the first timer through the eleventh resistor. The anode of the third diode is connected to one terminal of the first potentiometer, and the cathode of the fourth diode is connected to one terminal of the second potentiometer. The other terminal of the first potentiometer is connected to the slider terminal of the first potentiometer, the other terminal of the second potentiometer, the slider terminal of the second potentiometer, the second terminal and the sixth terminal of the first timer, and is connected to the first terminal of the first timer, one terminal of the fifth capacitor and the second terminal of the power interface through the fourth capacitor. The other terminal of the fifth capacitor is connected to the fifth terminal of the first timer. The third terminal of the first timer is connected to the B terminal of the first logic chip and the A terminal of the fourth logic chip. The output terminal of the first inverter is connected to the A terminal of the third logic chip and the B terminal of the second logic chip.

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