Thermal battery simulation circuit

Abstract

The invention relates to the technical field of thermal battery simulation, and discloses a thermal battery simulation circuit, which is used for simulating the discharge process of a thermal battery by adjusting the output voltage of a programmable power supply, and comprises a main control circuit and a self-holding circuit, the input end of the main control circuit inputs an activation signal, the output end of the main control circuit is connected with the control end of the self-holding circuit, and the first end of the main control circuit is connected with the control end of the programmable power supply; the input end of the self-holding circuit is connected with the output end of the programmable power supply; when an activation signal exists, the self-holding circuit switches the on-off state, and after the master control circuit controls the programmable power supply to adjust the magnitude of the output voltage according to an internal preset thermal battery discharge voltage parameter, the self-holding circuit continuously outputs an analog voltage. The activation time and voltage establishment process of the thermal battery can be truly simulated, and the accuracy is high.

Description

Technical Field

[0001] The invention relates to the technical field of thermal battery simulation, and in particular to a thermal battery simulation circuit. Background Art

[0002] The thermal battery for system power supply on special equipment can only power the equipment when it is in working state, and the thermal battery can only release electricity to power the equipment after being activated. With the improvement of the testability requirements of special equipment, it is required that the thermal battery can also be replaced by bypass power supply when it is not working, so that the equipment can work normally. However, the bypass power supply method cannot simulate the real working state of disposable batteries, and the existing thermal battery simulation device has the following defects:

[0003] 1. Existing thermal battery simulation devices generally perform output control through electromagnetic relays or contactors and cannot simulate the actual battery activation time.

[0004] 2. The existing thermal battery simulation device is powered by a DC power supply and cannot simulate the thermal battery voltage establishment process.

[0005] 3. The existing thermal battery simulation device does not have a communication interface, which is not convenient for automated testing and does not conform to the trend of future automated testing factories. Summary of the invention

[0006] Therefore, the technical problem to be solved by the present invention is to solve the problem of low accuracy of the thermal battery simulation device in the prior art, thereby providing a thermal battery simulation circuit.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] The present invention provides a thermal battery simulation circuit, which is used for simulating the discharge process of a thermal battery by adjusting the output voltage of a programmable power supply. The thermal battery simulation circuit comprises: a main control circuit and a self-holding circuit, wherein a power supply end of the main control circuit is connected to an external power supply, an activation signal is input to an input end of the main control circuit, an output end of the main control circuit is connected to a control end of the self-holding circuit, a first end of the main control circuit is connected to a control end of the programmable power supply; an input end of the self-holding circuit is connected to an output end of the programmable power supply; when there is an activation signal, the self-holding circuit switches a switch state, and after the main control circuit controls the programmable power supply to adjust the output voltage according to an internally preset thermal battery discharge voltage parameter, the self-holding circuit continuously outputs a simulation voltage.

[0009] In the thermal battery simulation circuit provided by the present invention, the main control circuit controls the programmable power supply to adjust the output voltage according to the internal preset thermal battery discharge voltage parameters, thereby truly simulating the activation time and voltage establishment process of the thermal battery. The thermal battery activation signal is isolated from the programmable power supply output signal, which more realistically simulates the actual usage scenario. The thermal battery simulation circuit provided by the present invention also has a self-holding function, which can achieve more precise control, improve the circuit's response speed and efficiency, and reduce the overall power consumption of the circuit.

[0010] In an optional embodiment, the self-holding circuit includes: a self-protection switch and a relay module, wherein the first end of the self-protection switch is connected to the positive pole of the output end of the main control circuit and the first end of the relay module, and the second end of the self-protection switch is connected to the second end of the relay module; the third end of the relay module is connected to the negative pole of the output end of the main control circuit, the fourth end and the fifth end of the relay module are both connected to the positive pole of the output end of the programmable power supply, and the sixth end of the relay module outputs an analog voltage; when there is an activation signal and the self-protection switch is closed, the relay module switches the switch state and continuously outputs the analog voltage.

[0011] In an optional embodiment, the relay module includes: a coil, a first single-pole double-throw switch and a second single-pole double-throw switch, wherein the first end of the coil is connected to the positive pole of the output end of the main control circuit, and the second end of the coil is connected to the negative pole of the output end of the main control circuit; the first static end of the first single-pole double-throw switch is connected to the second end of the self-protection switch, the second static end of the first single-pole double-throw switch is suspended, and the moving end of the first single-pole double-throw switch is connected to the moving end of the second single-pole double-throw switch and the positive pole of the output end of the programmable power supply; the first static end of the second single-pole double-throw switch is suspended, and the second static end of the second single-pole double-throw switch outputs an analog voltage; when there is no activation signal or the self-protection switch is disconnected, the coil loses power so that the second static end of the first single-pole double-throw switch is connected to its moving end, and the first static end of the second single-pole double-throw switch is connected to its moving end; when there is an activation signal and the self-protection switch is closed, the coil is energized so that the first static end of the first single-pole double-throw switch is connected to its moving end, and the second static end of the second single-pole double-throw switch is connected to its moving end.

[0012] In an optional embodiment, the relay module also includes: a discharge unit, wherein a first end of the discharge unit is connected to the positive output terminal of the main control circuit, and a second end of the discharge unit is connected to the negative output terminal of the main control circuit, and the discharge unit is used to provide a discharge path for the energy in the coil.

[0013] The thermal battery simulation circuit provided by the present invention has a discharge unit capable of discharging the reverse electromotive force in the coil to protect other components in the relay module.

[0014] In an optional embodiment, the thermal battery simulation circuit also includes: an input terminal and an output terminal, wherein the input end of the input terminal inputs an activation signal, and the output end of the input terminal is connected to the input end of the main control circuit; the input end of the output terminal is connected to the output end of the main control circuit, and the output end of the output terminal is connected to the control end of the self-holding circuit.

[0015] In an optional embodiment, the thermal battery simulation circuit also includes: a transceiver circuit, wherein a first end of the transceiver circuit is connected to a first end of the main control circuit, a second end of the transceiver circuit is connected to a control end of a programmable power supply, and a third end of the transceiver circuit inputs an external thermal battery discharge voltage parameter; the transceiver circuit is used to send the thermal battery discharge voltage parameter to the main control circuit, and transmit the control instruction output by the main control circuit to the programmable power supply, so that the programmable power supply adjusts the output voltage according to the thermal battery discharge voltage parameter.

[0016] The thermal battery simulation circuit provided by the present invention allows an operator to send the thermal battery discharge voltage parameters to a main control circuit through a transceiver circuit, and can also monitor and record the output voltage state of a programmable power supply through the transceiver circuit, thereby improving the automation level of thermal battery simulation testing.

[0017] In an optional embodiment, the thermal battery simulation circuit also includes: a power conversion module, wherein a first end of the power conversion module is connected to an external power source, a second end of the power conversion module is connected to a power supply end of a main control circuit, and the power conversion module is used to convert an external power supply voltage.

[0018] In an optional embodiment, the thermal battery simulation circuit further includes: an indicator light, wherein two ends of the indicator light are respectively connected to an external power supply and an output end of the self-holding circuit, and is used to light up when the self-holding circuit outputs a simulation voltage.

[0019] In an optional implementation, the thermal battery simulation circuit further includes: an industrial computer, wherein the industrial computer is communicatively connected to the main control circuit, and the industrial computer is used to send the received thermal battery discharge voltage parameter to the main control circuit.

[0020] With the thermal battery simulation circuit provided by the present invention, an operator can conveniently communicate with the main control circuit through an industrial computer, and monitor and adjust the output voltage state of the programmable power supply in real time.

[0021] In an optional embodiment, the thermal battery simulation circuit further includes: a device housing, wherein a main control circuit and a self-holding circuit are built into the device housing, and a self-protection switch and an indicator light are embedded and installed on the outer surface of the device housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 is a structural schematic diagram of a thermal battery simulation circuit according to an embodiment of the present invention;

[0024] Figure 2 is a specific circuit diagram of a self-holding circuit according to an embodiment of the present invention;

[0025] Figure 3 is another structural schematic diagram of a thermal battery simulation circuit according to an embodiment of the present invention;

[0026] Figure 4 is another structural schematic diagram of a thermal battery simulation circuit according to an embodiment of the present invention;

[0027] Figure 5 is another structural schematic diagram of a thermal battery simulation circuit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] Thermal battery simulators usually have the following features:

[0033] (1) Strong versatility: The thermal battery simulator is a universal device that needs to simulate a variety of thermal batteries. However, the working voltage, working current, and activation time of the simulated objects are not exactly the same, so the thermal battery simulator needs to have very strong versatility;

[0034] (2) High reliability requirements: As an important device in system testing, the thermal battery simulator needs to have strong reliability to meet the test requirements;

[0035] (3) High authenticity: The thermal battery simulator needs to simulate voltage, activation time and other characteristics realistically;

[0036] (4) Strong environmental adaptability: The thermal battery simulator can be used indoors or outdoors in a laboratory and is also adaptable to a temperature range of -40°C to 60°C.

[0037] Existing thermal battery simulation devices cannot simulate the actual thermal battery activation time and activation process, or the simulated thermal battery voltage establishment process has low accuracy.

[0038] In order to obtain a more realistic thermal battery voltage establishment process, this embodiment provides a thermal battery simulation circuit, which is used to simulate the discharge process of the thermal battery by adjusting the output voltage of the programmable power supply, such as Figure 1 As shown, the thermal battery simulation circuit includes: a main control circuit 1 and a self-holding circuit 2.

[0039] Figure 1 In the embodiment, the power supply end of the main control circuit 1 is connected to the external power supply, the input end of the main control circuit 1 inputs the activation signal, the output end of the main control circuit 1 is connected to the control end of the self-holding circuit 2, and the first end of the main control circuit 1 is connected to the control end of the programmable power supply.

[0040] Specifically, Figure 1In the present invention, when thermal battery simulation is required, the simulated thermal battery is first activated and a time discharge test is performed on the simulated thermal battery, so as to determine the curve of the discharge voltage changing with time during the activation process of the simulated thermal battery, and then the curve and related parameters are written into the main control circuit 1 for storage. When the simulated object needs to be replaced, only the curve of the discharge voltage changing with time of the new simulated thermal battery needs to be rewritten into the main control circuit 1.

[0041] Figure 1 In the embodiment, the input end of the self-holding circuit 2 is connected to the output end of the program-controlled power supply.

[0042] Specifically, Figure 1 In the embodiment, the self-holding circuit 2 includes a self-holding start switch. When thermal battery simulation is required, the operator turns on the self-holding start switch, so that the self-holding circuit 2 starts the self-holding function, thereby reducing the overall energy consumption of the circuit. When the main control circuit 1 receives the activation signal, it indicates the start of the activation process of the simulated thermal battery. The main control circuit 1 dynamically adjusts the output voltage of the programmable power supply according to the internal preset curve of the discharge voltage of the simulated thermal battery changing with time, so that the programmable power supply works according to the working state after the simulated thermal battery is activated, and the programmable power supply outputs the simulation voltage through the self-holding circuit 2.

[0043] Specifically, Figure 1 In the embodiment, the main control circuit 1 receives the activation signal and outputs the control signal to the self-holding circuit 2, so that the self-holding circuit 2 switches the switch state and maintains the self-holding state and continuously outputs the analog voltage. The process in which the analog voltage output by the programmable power supply changes with time is the process in which the simulated thermal battery voltage is established.

[0044] It should be noted that the activation time of a thermal battery is generally considered to be activated when the voltage reaches a certain voltage during the thermal battery voltage building process. The activation time is from the beginning of voltage building to the voltage reaching the lower limit of the battery operating voltage. The operator can determine the activation time based on the curve of voltage change over time during the simulated thermal battery activation process, thereby adjusting the output voltage of the programmable power supply.

[0045] In the thermal battery simulation circuit provided in this embodiment, the main control circuit controls the programmable power supply to adjust the output voltage according to the internal preset thermal battery discharge voltage parameters, thereby truly simulating the activation time and voltage establishment process of the thermal battery. The thermal battery activation signal is isolated from the programmable power supply output signal, which more realistically simulates the actual usage scenario. The thermal battery simulation circuit provided in this embodiment also has a self-holding function, which can achieve more precise control, improve the circuit's response speed and efficiency, and reduce the overall power consumption of the circuit.

[0046] In some optional embodiments, such as Figure 2As shown, the self-holding circuit 2 includes: a self-protection switch 21 and a relay module 22, wherein the first end of the self-protection switch 21 is connected to the positive electrode of the output end of the main control circuit 1 (i.e., the end that outputs the relay control signal +) and the first end of the relay module 22, and the second end of the self-protection switch 21 is connected to the second end of the relay module 22; the third end of the relay module 22 is connected to the negative electrode of the output end of the main control circuit 1 (i.e., the end that outputs the relay control signal -), the fourth end and the fifth end of the relay module 22 are both connected to the programmable power supply output +, and the sixth end of the relay module outputs an analog voltage.

[0047] Specifically, refer to Figure 1 and Figure 2 When there is an activation signal and the self-protection switch 21 is closed, the main control circuit 1 outputs a positive relay control signal and a negative relay control signal, so that after the relay module 22 switches the switch state, the self-holding circuit 2 maintains the self-holding state, and the programmable power supply continuously outputs positive and negative analog voltages through the self-holding circuit 2.

[0048] In some optional embodiments, such as Figure 2 As shown, the relay module 22 includes: a coil Q, a first single-pole double-throw switch K1 and a second single-pole double-throw switch K2, wherein the first end of the coil Q is connected to the positive pole of the output end of the main control circuit 1, and the second end of the coil Q is connected to the negative pole of the output end of the main control circuit 1; the first static end of the first single-pole double-throw switch K1 is connected to the second end of the self-protection switch 21, the second static end of the first single-pole double-throw switch K1 is suspended, the moving end of the first single-pole double-throw switch K1 is connected to the moving end of the second single-pole double-throw switch K2 and the positive pole of the output end of the programmable power supply; the first static end of the second single-pole double-throw switch K2 is suspended, and the second static end of the second single-pole double-throw switch K2 outputs an analog voltage.

[0049] Specifically, Figure 2 In the circuit, the relay control signal - and the analog voltage output - are in common ground externally. When there is no activation signal or the self-protection switch 21 is disconnected, the coil Q loses power, so that the second static end of the first single-pole double-throw switch K1 is connected to its dynamic end, and the first static end of the second single-pole double-throw switch K2 is connected to its dynamic end. The output + of the programmable power supply and the analog voltage output + are disconnected, and the self-holding circuit 2 has no analog voltage output.

[0050] Specifically, Figure 2 In the embodiment, when there is an activation signal and the self-protection switch 21 is closed, the relay module 22 receives the relay control signal + and the relay control signal - sent by the main control circuit 1, and the coil Q is energized so that the first static end of the first single-pole double-throw switch K1 is connected to its moving end, and the second static end of the second single-pole double-throw switch K2 is connected to its moving end, the output + of the programmable power supply is connected to the analog voltage output +, and the self-holding circuit 2 continuously outputs the analog voltage.

[0051] Optionally, Figure 2 In the embodiment, the first single-pole double-throw switch K1 and the second single-pole double-throw switch K2 can also be single-pole single-throw switches. When there is no activation signal or the self-protection switch 21 is disconnected, the coil Q loses power so that the two single-pole single-throw switches are disconnected, the output + of the program-controlled power supply and the analog voltage output + are disconnected, and the self-holding circuit 2 has no analog voltage output. When there is an activation signal and the self-protection switch 21 is closed, the coil Q is energized so that the two single-pole single-throw switches are closed, the output + of the program-controlled power supply and the analog voltage output + are connected, and the self-holding circuit 2 continues to output the analog voltage.

[0052] In some optional embodiments, such as Figure 2 As shown, the relay module 22 also includes: a discharge unit 221, wherein the first end of the discharge unit 221 is connected to the positive pole of the output end of the main control circuit 1, and the second end of the discharge unit 221 is connected to the negative pole of the output end of the main control circuit 1, and the discharge unit 221 is used to provide a discharge path for the energy in the coil Q.

[0053] Optionally, Figure 2 In the embodiment, the discharge unit 221 may be a diode or a resistor, and the specific component type is not limited here.

[0054] Optionally, Figure 3 In the figure, the thermal battery simulation circuit also includes: an input terminal 3 and an output terminal 4, wherein the input end of the input terminal 3 inputs an activation signal, and the output end of the input terminal 3 is connected to the input end of the main control circuit 1; the input end of the output terminal 4 is connected to the output end of the main control circuit 1, and the output end of the output terminal 4 is connected to the control end of the self-holding circuit 2.

[0055] In some optional embodiments, such as Figure 4 As shown, the thermal battery simulation circuit also includes: a transceiver circuit 5, wherein a first end of the transceiver circuit 5 is connected to a first end of the main control circuit 1, a second end of the transceiver circuit 5 is connected to a control end of a programmable power supply, and a third end of the transceiver circuit 5 inputs an external thermal battery discharge voltage parameter.

[0056] Specifically, Figure 4 In the embodiment, the transceiver circuit 5 is used to receive the simulated thermal battery discharge voltage parameters, and send the thermal battery discharge voltage parameters to the main control circuit 1 for storage, and at the same time transmit the control instructions output by the main control circuit 1 to the programmable power supply, so that the programmable power supply adjusts the output voltage according to the thermal battery discharge voltage parameters.

[0057] Optionally, Figure 4 In the embodiment, the transceiver circuit 5 can be an RS-422 chip, and the RS-422 chip interface baud rate is 115200, including 1 start bit, 8 digital bits and 1 stop bit.

[0058] Optionally, Figure 4In the embodiment, the thermal battery simulation circuit further includes: an industrial computer 6, wherein the industrial computer 6 is in communication connection with the main control circuit 1, and the operator can use the industrial computer 6 to send the discharge parameters of the thermal battery to be simulated to the main control circuit through the transceiver circuit 5. When the working voltage, working current, and activation time of different thermal batteries to be simulated are not exactly the same, the simulation of multiple thermal batteries to be simulated can be achieved by only setting and adjusting the parameters through the industrial computer 6, thereby improving the versatility of the thermal battery simulation circuit.

[0059] In some optional embodiments, such as Figure 4 As shown, the thermal battery simulation circuit also includes: a power conversion module 7, wherein a first end of the power conversion module 7 is connected to an external power source, a second end of the power conversion module 7 is connected to a power supply end of the main control circuit 1, and the power conversion module 7 is used to convert an external power supply voltage.

[0060] Specifically, Figure 4 In the embodiment, the programmable power supply is a DC power supply. When the external power supply is AC power, the power conversion module 7 is an AC-DC module, which converts the AC power into DC power that matches the voltage level of the main control circuit 1; when the external power supply is direct current, the power conversion module 7 is a DC-DC module, which converts the external power supply voltage into a voltage level that matches the main control circuit 1.

[0061] In some optional embodiments, such as Figure 5 As shown, the thermal battery simulation circuit also includes: a device housing 8, wherein a main control circuit 1 and a self-holding circuit 2 are built in the device housing, and a self-protection switch 21 is embedded and installed on the outer surface of the device housing 8.

[0062] Specifically, refer to Figure 4 and Figure 5 The thermal battery simulation circuit also includes: an indicator light 9, wherein the indicator light 9 is an activation status indicator light, which is embedded and installed on the outer surface of the device housing 8, and the two ends of the indicator light 9 are respectively connected to the external power supply and the output end of the self-holding circuit 2, and it is used to light up when the self-holding circuit 2 outputs an analog voltage, indicating that the programmable power supply has been activated, and the analog voltage output by the self-holding circuit 2 is the discharge voltage of the simulated thermal battery.

[0063] Optionally, Figure 5 In the present invention, those skilled in the art can set a plurality of LEDs on the outer surface of the device housing 8 according to actual needs to indicate various working states of the thermal battery simulation circuit, such as abnormal working and completion of working.

[0064] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A thermal battery simulation circuit, characterized in that: It is used to simulate the discharge process of a thermal battery by adjusting the output voltage of a programmable power supply. The thermal battery simulation circuit includes: a main control circuit and a self-holding circuit, wherein: The power supply end of the main control circuit is connected to an external power supply, the input end of the main control circuit inputs an activation signal, the output end of the main control circuit is connected to the control end of the self-holding circuit, and the first end of the main control circuit is connected to the control end of the programmable power supply; The input end of the self-holding circuit is connected to the output end of the program-controlled power supply; When there is an activation signal, the self-holding circuit switches the switch state, and after the main control circuit controls the programmable power supply to adjust the output voltage according to the internal preset thermal battery discharge voltage parameter, the self-holding circuit continues to output the analog voltage.

2. The thermal battery simulation circuit according to claim 1, characterized in that: The self-holding circuit includes: a self-holding switch and a relay module, wherein: The first end of the self-protection switch is connected to the positive output terminal of the main control circuit and the first end of the relay module, and the second end of the self-protection switch is connected to the second end of the relay module; The third end of the relay module is connected to the negative electrode of the output end of the main control circuit, the fourth end and the fifth end of the relay module are both connected to the positive electrode of the output end of the programmable power supply, and the sixth end of the relay module outputs an analog voltage; When there is an activation signal and the self-protection switch is closed, the relay module switches the switch state and continuously outputs the analog voltage.

3. The thermal battery simulation circuit according to claim 2, characterized in that: The relay module includes: a coil, a first single-pole double-throw switch and a second single-pole double-throw switch, wherein: The first end of the coil is connected to the positive output terminal of the main control circuit, and the second end of the coil is connected to the negative output terminal of the main control circuit; The first static end of the first single-pole double-throw switch is connected to the second end of the self-protection switch, the second static end of the first single-pole double-throw switch is suspended, and the moving end of the first single-pole double-throw switch is connected to the moving end of the second single-pole double-throw switch and the positive electrode of the output end of the programmable power supply; The first static end of the second single-pole double-throw switch is suspended, and the second static end of the second single-pole double-throw switch outputs an analog voltage; When there is no activation signal or the self-protection switch is disconnected, the coil loses power so that the second static end of the first single-pole double-throw switch is connected to its dynamic end, and the first static end of the second single-pole double-throw switch is connected to its dynamic end; When there is an activation signal and the self-protection switch is closed, the coil is energized so that the first static end of the first single-pole double-throw switch is connected to its dynamic end, and the second static end of the second single-pole double-throw switch is connected to its dynamic end.

4. The thermal battery simulation circuit according to claim 3, characterized in that: The relay module further includes: a discharge unit, wherein: The first end of the discharge unit is connected to the positive output terminal of the main control circuit, and the second end of the discharge unit is connected to the negative output terminal of the main control circuit. The discharge unit is used to provide a discharge path for the energy in the coil.

5. The thermal battery simulation circuit according to claim 1, characterized in that: Also includes: Input terminals and output terminals, where The input end of the input terminal inputs an activation signal, and the output end of the input terminal is connected to the input end of the main control circuit; The input end of the output terminal is connected to the output end of the main control circuit, and the output end of the output terminal is connected to the control end of the self-holding circuit.

6. The thermal battery simulation circuit according to claim 1, characterized in that: Also includes: Transceiver circuit, where The first end of the transceiver circuit is connected to the first end of the main control circuit, the second end of the transceiver circuit is connected to the control end of the programmable power supply, and the third end of the transceiver circuit inputs the external thermal battery discharge voltage parameter; The transceiver circuit is used to send the thermal battery discharge voltage parameter to the main control circuit, and transmit the control instruction output by the main control circuit to the programmable power supply, so that the programmable power supply adjusts the output voltage according to the thermal battery discharge voltage parameter.

7. The thermal battery simulation circuit according to claim 1, characterized in that: Also includes: A power conversion module, wherein: The first end of the power conversion module is connected to the external power supply, the second end of the power conversion module is connected to the power supply end of the main control circuit, and the power conversion module is used to convert the external power supply voltage.

8. The thermal battery simulation circuit according to claim 2, characterized in that: Also includes: Indicator lights, among which, The two ends of the indicator light are respectively connected to an external power supply and an output end of the self-holding circuit, and are used to light up when the self-holding circuit outputs an analog voltage.

9. The thermal battery simulation circuit according to claim 1, characterized in that: Also includes: Industrial computers, including The industrial computer is in communication connection with the main control circuit, and the industrial computer is used to send the received thermal battery discharge voltage parameter to the main control circuit.

10. The thermal battery simulation circuit according to claim 8, characterized in that: Also includes: Device housing, wherein The main control circuit and the self-holding circuit are built in the device housing, and the self-protection switch and the indicator light are embedded and installed on the outer surface of the device housing.

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