Detection temperature control circuit of lithium battery protection board tester

Abstract

The utility model discloses a detection temperature control circuit of a lithium battery protection board tester, which relates to the technical field of temperature control and comprises a lithium battery protection board tester module, a lithium battery protection board tester module and a temperature control module, the lithium battery protection board detects the charging and discharging states of the capacitor and receives data detected and output by the lithium battery protection board, meanwhile, the temperature detection module conducts over-temperature detection through a set first over-temperature threshold value and a set second over-temperature threshold value, and when the temperature is larger than the first over-temperature threshold value, the heat dissipation module conducts heat dissipation; when the over-temperature duration exceeds the first timing time set by the first timing module, the charging and discharging power is automatically reduced through the adjusting control module, and when the over-temperature duration exceeds the second timing time set by the second timing module or the temperature is larger than a second temperature threshold value, charging and discharging are stopped. The detection temperature control circuit of the lithium battery protection board tester can be used for reasonably controlling the temperature.

Description

TECHNICAL FIELD

[0001] The utility model relates to temperature control technical field, specifically a kind of detection temperature control circuit of lithium battery protection board tester. BACKGROUND

[0002] Lithium battery protection board tester is used for the instrument of lithium battery protection board test, the function of lithium battery protection board can be detected good and each performance index parameter, to avoid the case that temperature is too high when lithium battery protection board tester is carried out function detection, simultaneously avoid the situation that the detection accuracy of lithium battery protection board tester reduces due to temperature is higher, in prior art, generally using the way of ventilation and heat dissipation carries out temperature control, temperature control is not ideal, therefore there is to be improved. CONTENT OF UTILITY MODEL

[0003] The utility model embodiment provides a kind of detection temperature control circuit of lithium battery protection board tester to solve the problems raised in the above background technique.

[0004] To achieve the above object, the utility model provides the following technical scheme:

[0005] A kind of detection temperature control circuit of lithium battery protection board tester, it include: lithium battery protection board tester module, voltage stabilizing processing module, temperature detection module, heat dissipation module, first timing module, second timing module and adjustment control module;

[0006] Lithium battery protection board tester module is used to provide electric energy, and is connected with lithium battery protection board and simulates the charge-discharge state of battery by capacitor, the charge-discharge state of capacitor is detected by lithium battery protection board and receives the data of lithium battery protection board detection output;

[0007] Voltage stabilizing processing module is connected with lithium battery protection board tester module, for the voltage stabilizing filtering processing of electric energy provided by lithium battery protection board tester module and output first electric energy;

[0008] Temperature detection module is connected with voltage stabilizing processing module, for receiving first electric energy and carrying out temperature detection, when the temperature signal of detection is greater than the first over-temperature threshold value set, output first control signal, and when temperature signal is greater than the second over-temperature threshold value set, output second control signal;

[0009] Heat dissipation module is connected with voltage stabilizing processing module and temperature detection module, for receiving first electric energy and carrying out ventilation and heat dissipation processing when receiving first control signal;

[0010] First timing module is connected with voltage stabilizing processing module and temperature detection module, for receiving first electric energy and setting first timing time, and when the duration of receiving first control signal exceeds first timing time, output third control signal;

[0011] The second timing module is connected with the first timing module, the voltage stabilizing processing module and the temperature detecting module, and is used for receiving the first electric energy and setting a second timing time, and outputting a fourth control signal when the duration of receiving the third control signal exceeds the second timing time;

[0012] The adjustment control module is connected with the lithium battery protection board tester module, the second timing module and the first timing module, and is used for reducing the charge-discharge power of the lithium battery protection board tester module when the third control signal is received, and stopping the charge-discharge work of the lithium battery protection board tester module when the fourth control signal is received.

[0013] As a further scheme of the utility model: the lithium battery protection board tester module includes a lithium battery protection board tester interface, a first power tube, a second power tube, a first capacitor, a first load and a lithium battery protection board interface;

[0014] Preferably, the first interface end of the lithium battery protection board tester interface is connected with the drain of the second power tube, the source of the first power tube is grounded through the first load, the source of the second power tube is connected with the drain of the first power tube and the first end of the lithium battery protection board interface and is connected with the second end of the lithium battery protection board interface, the ground end of the lithium battery protection board tester interface through the first capacitor, the second interface end, the third interface end and the fourth interface end of the lithium battery protection board tester interface are connected with the gate of the first power tube, the gate of the second power tube and the third end of the lithium battery protection board interface respectively.

[0015] As a further scheme of the utility model: the voltage stabilizing processing module includes a first voltage stabilizer and a second capacitor; the temperature detecting module includes a first thermistor, a second resistor, a third resistor, a first potentiometer, a fourth resistor, a first comparator, a seventh resistor, a first diode and a second diode;

[0016] Preferably, the first end of the first voltage stabilizer is connected with the first interface of the lithium battery protection board tester interface, the third end of the first voltage stabilizer is connected with one end of the first thermistor and one end of the second capacitor and is connected with one end of the first potentiometer through the third resistor, the other end of the first thermistor is connected with the inverting end of the first comparator and one end of the seventh resistor and is connected with the other end of the second capacitor, the second end of the first voltage stabilizer and one end of the fourth resistor through the second resistor, the other end of the fourth resistor is connected with the other end of the first potentiometer, the wiper end of the first potentiometer is connected with the non-inverting end of the first comparator, the output end of the first comparator is connected with the heat dissipation module and the first timing module, the other end of the seventh resistor is connected with the cathode of the first diode, the anode of the first diode is connected with the anode of the second diode, and the cathode of the second diode is connected with the second timing module.

[0017] As a further scheme of the utility model: the first timing module includes sixth switch tube, fifth resistance, third capacitor, seventh switch tube and sixth resistance;

[0018] Preferably, the base of the sixth switch tube is connected with the output end of the first comparator, the emitter of the sixth switch tube is connected with the base of the seventh switch tube and one end of the third capacitor and the other end of the third capacitor, the first end of the sixth resistance and the ground end through the fifth resistance, the collector of the sixth switch tube is connected with the collector of the seventh switch tube and the third end of the first voltage stabilizer, and the emitter of the seventh switch tube is connected with the second timing module and the second end of the sixth resistance.

[0019] As a further scheme of the utility model: the heat dissipation module includes heat dissipation device and fifth switch tube;

[0020] Preferably, the first end of the heat dissipation device is connected with the third end of the first voltage stabilizer, the emitter of the fifth switch tube is grounded, and the base of the fifth switch tube is connected with the output end of the first comparator.

[0021] As a further scheme of the utility model: the adjustment control module includes first switch tube, second switch tube, third switch tube, fourth switch tube and first resistance;

[0022] Preferably, the collector of the first switch tube is connected with the gate of the first power tube and the collector of the third switch tube, the collector of the second switch tube is connected with the gate of the second power tube and the collector of the fourth switch tube, the emitter of the third switch tube is connected with the emitter of the fourth switch tube and the emitter of the first switch tube, the emitter of the second switch tube and the ground end through the first resistance, the base of the first switch tube is connected with the base of the second switch tube and the second timing module, and the base of the third switch tube is connected with the base of the fourth switch tube and the second end of the sixth resistance.

[0023] As a further scheme of the utility model: the second timing module includes eighth switch tube, eighth resistance, fourth capacitor, ninth resistance and ninth switch tube;

[0024] Preferably, the collector of the eighth switch tube is connected with the collector of the ninth switch tube and the third end of the first voltage stabilizer, the emitter of the eighth switch tube is connected with the base of the ninth switch tube and one end of the eighth resistance and the other end of the eighth resistance, one end of the ninth resistance and the ground end through the fourth capacitor, and the other end of the ninth resistance is connected with the emitter of the ninth switch tube, the cathode of the second diode and the base of the first switch tube.

[0025] Compared with the prior art, the lithium battery protection plate tester has the beneficial effects that: the detection temperature control circuit of the lithium battery protection plate tester can be connected with the lithium battery protection plate through the lithium battery protection plate tester module and simulate the charge and discharge state of the battery through the capacitor, the charge and discharge state of the capacitor is detected by the lithium battery protection plate, and the data output by the lithium battery protection plate detection is received, meanwhile, the temperature detection module performs over-temperature detection on two different voltage states through the set first over-temperature threshold and second over-temperature threshold, and when the temperature is greater than the first over-temperature threshold, the heat dissipation module is controlled to perform heat dissipation work, meanwhile, when the over-temperature duration exceeds the first timing time set by the first timing module, the charge and discharge power is automatically reduced through the adjustment control module, and when the over-temperature duration exceeds the second timing time set by the second timing module or the temperature is greater than the second temperature threshold, the lithium battery protection plate tester module is controlled to stop the charge and discharge by the adjustment control module, and the temperature control is reasonable. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0027] Figure 1 The principle block diagram of the detection temperature control circuit of the lithium battery protection plate tester is provided for the embodiments of the present application.

[0028] Figure 2 The circuit diagram of the detection temperature control circuit of the lithium battery protection plate tester is provided for the embodiments of the present application.

[0029] Figure 3 The connection circuit diagram of the second timing module is provided for the embodiments of the present application. DETAILED DESCRIPTION

[0030] The technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application, and obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0031] In one embodiment, please refer to Figure 1The application discloses a detection temperature control circuit of a lithium battery protection plate tester, which comprises a lithium battery protection plate tester module 1, a voltage stabilization processing module 2, a temperature detection module 3, a heat dissipation module 4, a first timing module 5, a second timing module 6 and an adjustment control module 7.

[0032] Specifically, the lithium battery protection plate tester module 1 is used for providing electric energy, connecting with the lithium battery protection plate and simulating the charge and discharge state of a battery through a capacitor, detecting the charge and discharge state of the capacitor by the lithium battery protection plate and receiving the data output by the lithium battery protection plate.

[0033] The voltage stabilization processing module 2 is connected with the lithium battery protection plate tester module 1 and is used for performing voltage stabilization filtering processing on the electric energy provided by the lithium battery protection plate tester module 1 and outputting first electric energy.

[0034] The temperature detection module 3 is connected with the voltage stabilization processing module 2 and is used for receiving the first electric energy and performing temperature detection, outputting a first control signal when the detected temperature signal is greater than a set first over-temperature threshold value and outputting a second control signal when the temperature signal is greater than a set second over-temperature threshold value.

[0035] The heat dissipation module 4 is connected with the voltage stabilization processing module 2 and the temperature detection module 3 and is used for receiving the first electric energy and performing ventilation and heat dissipation processing when the first control signal is received.

[0036] The first timing module 5 is connected with the voltage stabilization processing module 2 and the temperature detection module 3 and is used for receiving the first electric energy and setting a first timing time and outputting a third control signal when the duration of the received first control signal exceeds the first timing time.

[0037] The second timing module 6 is connected with the first timing module 5, the voltage stabilization processing module 2 and the temperature detection module 3 and is used for receiving the first electric energy and setting a second timing time and outputting a fourth control signal when the duration of the received third control signal exceeds the second timing time.

[0038] The adjustment control module 7 is connected with the lithium battery protection plate tester module 1, the second timing module 6 and the first timing module 5 and is used for reducing the charge and discharge power of the lithium battery protection plate tester module 1 when the third control signal is received and stopping the charge and discharge work of the lithium battery protection plate tester module 1 when the fourth control signal is received.

[0039] In specific embodiments, the above-mentioned lithium battery protection board tester module 1 can adopt a lithium battery protection board tester circuit composed of a lithium battery protection board tester interface, a lithium battery protection board interface, a field effect tube, an analog capacitor, etc. The lithium battery protection board tester module 1 can be connected with the lithium battery protection board through the lithium battery protection board interface and simulate the charging and discharging state of the battery through the capacitor. The charging and discharging state of the capacitor is detected by the lithium battery protection board, and the data output by the lithium battery protection board is received. The charging and discharging control of the capacitor and the data reception are both completed by the lithium battery protection board tester connected with the lithium battery protection board tester interface. The above-mentioned voltage stabilization processing module 2 can adopt a voltage stabilization adjustment circuit composed of a voltage stabilizer and a capacitor for voltage stabilization filtering processing. The above-mentioned temperature detection module 3 can adopt a temperature detection circuit composed of a thermistor, a resistor, a comparator, a diode, etc. The first over-temperature threshold and the second over-temperature threshold can be set, and the temperature detection can be performed. The voltage of the second over-temperature threshold is greater than the voltage of the first over-temperature threshold. The above-mentioned heat dissipation module 4 can adopt a heat dissipation circuit composed of a heat dissipation device and a triode for ventilation and heat dissipation work. The above-mentioned first timing module 5 can adopt a first timing circuit composed of a triode, a capacitor and a resistor. The first timing time can be set, and the timing work can be performed. The first timing time is set according to the requirement. The above-mentioned second timing module 6 can adopt a second timing circuit composed of a triode, a capacitor and a resistor. The second timing time can be set, and the timing work can be performed. The second timing time is set according to the requirement. The above-mentioned adjustment control module 7 can adopt an adjustment control circuit composed of a triode and a resistor. The charging and discharging power and the charging and discharging working state of the lithium battery protection board tester module 1 can be adjusted.

[0040] In another embodiment, referring to Figure 1 , Figure 2 and Figure 3 , the lithium battery protection board tester module 1 includes a lithium battery protection board tester interface, a first power tube Q1, a second power tube Q2, a first capacitor C1, a first load RL1 and a lithium battery protection board interface.

[0041] Specifically, the first interface end of the lithium battery protection board tester interface is connected with the drain of the second power tube Q2. The source of the first power tube Q1 is grounded through the first load RL1. The source of the second power tube Q2 is connected with the drain of the first power tube Q1 and the first end of the lithium battery protection board interface and connected with the second end of the lithium battery protection board interface, the ground end of the lithium battery protection board tester interface through the first capacitor C1. The second interface end, the third interface end and the fourth interface end of the lithium battery protection board tester interface are respectively connected with the gate of the first power tube Q1, the gate of the second power tube Q2 and the third end of the lithium battery protection board interface.

[0042] In specific embodiments, the first power tube Q1 and the second power tube Q2 can be N-channel field effect tubes; the first interface end of the battery protection board tester interface is connected to the power supply end of the battery protection board tester, the second interface end is connected to the discharge control end of the lithium battery protection board tester, the discharge control of the first capacitor C1 is realized, the third interface end is connected to the charging control end of the lithium battery protection board tester, the charging control of the first capacitor C1 is realized, and then the charging and discharging work is simulated, and the fourth interface end is the signal receiving end of the lithium battery protection board tester, which receives the output data of the lithium battery protection board during the charging and discharging detection.

[0043] Further, the voltage stabilization processing module 2 comprises a first voltage stabilizer IC1 and a second capacitor C2; the temperature detection module 3 comprises a first thermistor N1, a second resistor R2, a third resistor R3, a first potentiometer RP1, a fourth resistor R4, a first comparator A1, a seventh resistor R7, a first diode D1 and a second diode D2;

[0044] Specifically, the first end of the first voltage stabilizer IC1 is connected to the first interface of the lithium battery protection board tester interface, the third end of the first voltage stabilizer IC1 is connected to one end of the first thermistor N1 and one end of the second capacitor C2, and is connected to one end of the first potentiometer RP1 through the third resistor R3, the other end of the first thermistor N1 is connected to the inverting end of the first comparator A1 and one end of the seventh resistor R7, and is connected to the other end of the second capacitor C2, the second end of the first voltage stabilizer IC1 and one end of the fourth resistor R4 through the second resistor R2, the other end of the fourth resistor R4 is connected to the other end of the first potentiometer RP1, the wiper end of the first potentiometer RP1 is connected to the non-inverting end of the first comparator A1, the output end of the first comparator A1 is connected to the heat dissipation module 4 and the first timing module 5, the other end of the seventh resistor R7 is connected to the cathode of the first diode D1, the anode of the first diode D1 is connected to the anode of the second diode D2, and the cathode of the second diode D2 is connected to the second timing module 6.

[0045] In specific embodiments, the first voltage stabilizer IC1 can be a 7812 voltage stabilizer; the first thermistor N1 can be a negative temperature coefficient thermistor; the third resistor R3, the first potentiometer RP1 and the fourth resistor R4 set the first over-temperature threshold, the seventh resistor R7 and the first diode D1 set the second over-temperature threshold; the first comparator A1 can be an LM358 comparator.

[0046] Further, the first timing module 5 comprises a sixth switch tube V6, a fifth resistor R5, a third capacitor C3, a seventh switch tube V7 and a sixth resistor R6;

[0047] Specifically, the base of the sixth switch V6 is connected to the output of the first comparator A1, the emitter of the sixth switch V6 is connected to the base of the seventh switch V7 and one end of the third capacitor C3, and is connected to the other end of the third capacitor C3, the first end of the sixth resistor R6 and the ground through the fifth resistor R5, the collector of the sixth switch V6 is connected to the collector of the seventh switch V7 and the third end of the first voltage regulator IC1, and the emitter of the seventh switch V7 is connected to the second timing module 6 and the second end of the sixth resistor R6.

[0048] In specific embodiments, the sixth switch V6 and the seventh switch V7 can be NPN transistors, and the fifth resistor R5 and the third capacitor C3 set the first timing time.

[0049] Further, the heat dissipation module 4 includes a heat dissipation device and a fifth switch V5.

[0050] Specifically, the first end of the heat dissipation device is connected to the third end of the first voltage regulator IC1, the emitter of the fifth switch V5 is grounded, and the base of the fifth switch V5 is connected to the output of the first comparator A1.

[0051] In specific embodiments, the heat dissipation device can be a fan, and the fifth switch V5 can be an NPN transistor.

[0052] Further, the adjustment control module 7 includes a first switch V1, a second switch V2, a third switch V3, a fourth switch V4 and a first resistor R1.

[0053] Specifically, the collector of the first switch V1 is connected to the gate of the first power tube Q1 and the collector of the third switch V3, the collector of the second switch V2 is connected to the gate of the second power tube Q2 and the collector of the fourth switch V4, the emitter of the third switch V3 is connected to the emitter of the fourth switch V4 and the emitter of the first switch V1, the emitter of the second switch V2 and the ground through the first resistor R1, the base of the first switch V1 is connected to the base of the second switch V2 and the second timing module 6, and the base of the third switch V3 is connected to the base of the fourth switch V4 and the second end of the sixth resistor R6.

[0054] In specific embodiments, the first switch V1, the second switch V2, the third switch V3 and the fourth switch V4 can all be NPN transistors.

[0055] Further, the second timing module 6 includes an eighth switch V8, an eighth resistor R8, a fourth capacitor C4, a ninth resistor R9 and a ninth switch V9.

[0056] Specifically, the collector of the eighth switch V8 is connected to the collector of the ninth switch V9 and the third terminal of the first voltage regulator IC1, the emitter of the eighth switch V8 is connected to the base of the ninth switch V9 and one end of the eighth resistor R8 and through the fourth capacitor C4 to the other end of the eighth resistor R8, one end of the ninth resistor R9 and the ground terminal, the other end of the ninth resistor R9 is connected to the emitter of the ninth switch V9, the cathode of the second diode D2 and the base of the first switch V1.

[0057] In a specific embodiment, the eighth switch V8 and the ninth switch V9 can be NPN type triodes, and the eighth resistor R8 and the fourth capacitor C4 set the second timing time.

[0058] The first interface end of the lithium battery protection board tester interface is connected with the power supply end of the lithium battery protection board tester, and the second interface end connected with the second interface end of the lithium battery protection board tester interface is connected with the discharge control end of the battery protection board tester, thereby driving the conduction of the first power tube Q1, realizing the discharge control of the first capacitor C1, and the released electric energy is consumed by the first load RL1, the third interface end of the lithium battery protection board tester interface is connected with the charging control end of the battery protection board tester, thereby driving the conduction of the second power tube Q2, realizing the charging control of the first capacitor C1, and then simulating the charging and discharging work, and the lithium battery protection board connected with the lithium battery protection board interface monitors the charging and discharging state of the first capacitor C1, and the third end of the lithium battery protection board interface is connected with the data output end of the lithium battery protection board, so as to transmit the detected data to the signal receiving end of the lithium battery protection board tester connected with the fourth interface end of the lithium battery protection board tester, and at the same time, the first voltage stabilizer IC1 and the second capacitor C2 perform voltage stabilizing and filtering processing, the first thermistor N1 and the second resistor R2 perform temperature detection, and when the detected temperature signal is greater than the first over-temperature threshold value set by the third resistor R3, the first potentiometer RP1 and the fourth resistor R4, the first comparator A1 controls the conduction of the fifth switch tube V5 and the sixth switch tube V6, the heat dissipation device is ventilated and cooled, and the third capacitor C3 detects the energy storage cooperates with the fifth resistor R5 timing, and when the stored electric energy triggers the conduction of the seventh switch tube V7, it is indicated that the timing time reaches the first timing time, the seventh switch tube V7 is turned on, the third switch tube V3 and the fourth switch tube V4 are controlled to be turned on, and then the conduction angle of the first power tube Q1 and the second power tube Q2 is reduced, the charging and discharging power is reduced, and the same reason is that if the conduction time of the seventh switch tube V7 exceeds the second timing time set by the eighth resistor R8 and the fourth capacitor C4, the ninth switch tube V9 is turned on, and the first switch tube V1 and the second switch tube V2 are triggered to be turned on, the first power tube Q1 and the second power tube Q2 are controlled to be cut off, and then the charging and discharging simulation is stopped, in addition, if the detected temperature signal is greater than the second over-temperature threshold value set by the seventh resistor R7 and the first diode D1, it is indicated that the temperature is high, and the charging and discharging simulation is directly stopped.

[0059] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0060] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature described. The specification can include implicit combinations of explicitly mentioned features and / or explicit combinations of implicitely mentioned features. Each embodiment depends on the explicit combinations of features and / or the implicit combinations of features made specifically within that embodiment, and each such embodiment can be combined with every other such embodiment to create further embodiments.

Claims

1. A detection temperature control circuit of a lithium battery protection board tester, characterized in that, the detection temperature control circuit of the lithium battery protection board tester comprises a lithium battery protection board tester module, a voltage stabilization processing module, a temperature detection module, a heat dissipation module, a first timing module, a second timing module and an adjustment control module; the lithium battery protection board tester module is configured to provide electric energy, connect with a lithium battery protection board, simulate the charging and discharging state of a battery through a capacitor, detect the charging and discharging state of the capacitor by the lithium battery protection board, and receive data output by the lithium battery protection board; the voltage stabilization processing module is connected with the lithium battery protection board tester module and configured to perform voltage stabilization filtering processing on the electric energy provided by the lithium battery protection board tester module and output first electric energy; the temperature detection module is connected with the voltage stabilization processing module and configured to receive the first electric energy and perform temperature detection, output a first control signal when a detected temperature signal is greater than a first over-temperature threshold, and output a second control signal when the temperature signal is greater than a second over-temperature threshold; the heat dissipation module is connected with the voltage stabilization processing module and the temperature detection module and configured to receive the first electric energy and perform ventilation and heat dissipation processing when the first control signal is received; the first timing module is connected with the voltage stabilization processing module and the temperature detection module and configured to receive the first electric energy and a first timing time, and output a third control signal when a duration of the first control signal exceeds the first timing time; the second timing module is connected with the first timing module, the voltage stabilization processing module and the temperature detection module and configured to receive the first electric energy and a second timing time, and output a fourth control signal when a duration of the third control signal exceeds the second timing time; the adjustment control module is connected with the lithium battery protection board tester module, the second timing module and the first timing module and configured to reduce the charging and discharging power of the lithium battery protection board tester module when the third control signal is received, and stop the charging and discharging work of the lithium battery protection board tester module when the fourth control signal is received.

2. The detection temperature control circuit of the lithium battery protection board tester according to claim 1, wherein, the lithium battery protection board tester module comprises a lithium battery protection board tester interface, a first power tube, a second power tube, a first capacitor, a first load and a lithium battery protection board interface; a first interface end of the lithium battery protection board tester interface is connected with a drain of the second power tube, a source of the first power tube is grounded through the first load, a source of the second power tube is connected with a drain of the first power tube and a first end of the lithium battery protection board interface and connected with a second end of the lithium battery protection board interface, a grounding end of the lithium battery protection board tester interface through the first capacitor, a second interface end, a third interface end and a fourth interface end of the lithium battery protection board tester interface are respectively connected with a gate of the first power tube, a gate of the second power tube and a third end of the lithium battery protection board interface.

3. The detection temperature control circuit of the lithium battery protection board tester according to claim 2, wherein, the voltage stabilization processing module comprises a first voltage stabilizer and a second capacitor; the temperature detection module comprises a first thermistor, a second resistor, a third resistor, a first potentiometer, a fourth resistor, a first comparator, a seventh resistor, a first diode and a second diode. The first end of the first voltage stabilizer is connected with the first interface of the lithium battery protection plate tester interface, one end of the first thermistor and one end of the second capacitor are connected with the third end of the first voltage stabilizer, and the third end of the first voltage stabilizer is connected with one end of the first potentiometer through the third resistor, the other end of the first thermistor is connected with the inverting terminal of the first comparator and one end of the seventh resistor, and the other end of the first thermistor is connected with the other end of the second capacitor, the second end of the first voltage stabilizer and one end of the fourth resistor through the second resistor, the other end of the fourth resistor is connected with the other end of the first potentiometer, the wiper end of the first potentiometer is connected with the non-inverting terminal of the first comparator, the output end of the first comparator is connected with the heat dissipation module and the first timing module, the other end of the seventh resistor is connected with the cathode of the first diode, the anode of the first diode is connected with the anode of the second diode, and the cathode of the second diode is connected with the second timing module.

4. The detecting temperature control circuit of the lithium battery protection board tester according to claim 3, wherein, The first timing module comprises a sixth switch tube, a fifth resistor, a third capacitor, a seventh switch tube and a sixth resistor; The base of the sixth switch tube is connected with the output end of the first comparator, the emitter of the sixth switch tube is connected with the base of the seventh switch tube and one end of the third capacitor and is connected with the other end of the third capacitor, the first end of the sixth resistor and the ground end through the fifth resistor, the collector of the sixth switch tube is connected with the collector of the seventh switch tube and the third end of the first voltage stabilizer, and the emitter of the seventh switch tube is connected with the second timing module and the second end of the sixth resistor.

5. The detecting temperature control circuit of the lithium battery protection board tester according to claim 3, wherein, The heat dissipation module comprises a heat dissipation device and a fifth switch tube; The first end of the heat dissipation device is connected with the third end of the first voltage stabilizer, the emitter of the fifth switch tube is grounded, and the base of the fifth switch tube is connected with the output end of the first comparator.

6. The detecting temperature control circuit of the lithium battery protection board tester according to claim 4, wherein, The adjustment control module comprises a first switch tube, a second switch tube, a third switch tube, a fourth switch tube and a first resistor; The collector of the first switch tube is connected with the gate of the first power tube and the collector of the third switch tube, the collector of the second switch tube is connected with the gate of the second power tube and the collector of the fourth switch tube, the emitter of the third switch tube is connected with the emitter of the fourth switch tube and is connected with the emitter of the second switch tube, the ground end and the emitter of the first switch tube through the first resistor, the base of the first switch tube is connected with the base of the second switch tube and the second timing module, and the base of the third switch tube is connected with the base of the fourth switch tube and the second end of the sixth resistor.

7. The detecting temperature control circuit of a lithium battery protection board tester according to claim 6, wherein, The second timing module comprises an eighth switch tube, an eighth resistor, a fourth capacitor, a ninth resistor and a ninth switch tube; The collector of the eighth switch tube is connected with the collector of the ninth switch tube and the third end of the first voltage stabilizer, the emitter of the eighth switch tube is connected with the base of the ninth switch tube and one end of the eighth resistor and is connected with the other end of the eighth resistor, one end of the ninth resistor and the ground end through the fourth capacitor, the other end of the ninth resistor is connected with the emitter of the ninth switch tube, the cathode of the second diode and the base of the first switch tube.

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