Thermal battery simulation circuit

Abstract

The utility model 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. According to the utility model, 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 utility model relates to the technical field of thermal battery simulation, in particular to a thermal battery simulation circuit. Background Art

[0002] Thermal batteries used to power special equipment can only provide power when in operation, and they can only release energy to power the equipment when activated. With increasing testability requirements for special equipment, there is a need to bypass the thermal battery even when it is not in operation, allowing the equipment to function normally. However, this bypass power method cannot simulate the actual working state of a disposable battery, and existing thermal battery simulators have the following drawbacks:

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

[0004] 2. The power supply source of the existing thermal battery simulation device is a DC power supply, which 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. Utility Model Content

[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-mentioned purpose, the present invention provides the following technical solutions:

[0008] The utility model 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 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 programmable 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 an internally preset thermal battery discharge voltage parameter, the self-holding circuit continuously outputs the simulation voltage.

[0009] This thermal battery simulation circuit provides a main control circuit that controls a programmable power supply to adjust its output voltage according to internally preset thermal battery discharge voltage parameters, thereby realistically simulating the activation time and voltage buildup of a thermal battery. The thermal battery activation signal is isolated from the programmable power supply output signal, further simulating real-world usage scenarios. The thermal battery simulation circuit also features a self-holding function, enabling more precise control, improving circuit response speed and efficiency while reducing overall power consumption.

[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 continues to output 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 further 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 utility model 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 further includes: an input terminal and an output terminal, wherein the input terminal inputs an activation signal, and the output terminal of the input terminal is connected to the input terminal of the main control circuit; the input terminal of the output terminal is connected to the output terminal of the main control circuit, and the output terminal of the output terminal is connected to the control terminal 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 utility model allows an operator to send the thermal battery discharge voltage parameters to the main control circuit through the transceiver circuit, and can also monitor and record the output voltage status of the programmable power supply through the transceiver circuit, thereby improving the automation level of the thermal battery simulation test.

[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 supply, 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 configured to light up when the self-holding circuit outputs a simulation voltage.

[0019] In an optional embodiment, 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 parameters to the main control circuit.

[0020] The thermal battery simulation circuit provided by the utility model allows operators to 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 utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

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

[0024] Figure 2 1 is a specific circuit diagram of a self-holding circuit according to an embodiment of the present utility model;

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

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

[0027] Figure 5 2 is another structural schematic diagram of a thermal battery simulation circuit according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0028] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; they may refer to internal connections between two components; they may refer to wireless connections or wired connections. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the 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 typically 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 operating voltage, operating 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 in a realistic manner;

[0036] (4) Strong environmental adaptability: The thermal battery simulator can be used indoors or in field laboratories, and is also adaptable to the 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 1When thermal battery simulation is required, the simulated thermal battery is first activated and subjected to a time discharge test. A curve showing the change in discharge voltage over time during the activation process of the simulated thermal battery is determined, and the curve and related parameters are then written into the main control circuit 1 for storage. When the simulated object needs to be replaced, the curve showing the change in discharge voltage over time of the new simulated thermal battery only 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 example, 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, causing self-holding circuit 2 to activate its self-holding function, thereby reducing overall circuit energy consumption. When the main control circuit 1 receives an activation signal, indicating the start of the simulated thermal battery activation process, the main control circuit 1 dynamically adjusts the output voltage of the programmable power supply according to an internally preset curve of the simulated thermal battery's discharge voltage over time, so that the programmable power supply operates in the same operating state as the simulated thermal battery after activation. The programmable power supply outputs a simulated voltage through the self-holding circuit 2.

[0043] Specifically, Figure 1 In the example, main control circuit 1 receives an activation signal and outputs a control signal to self-holding circuit 2, causing it to switch state and maintain the self-holding state while continuously outputting the analog voltage. The process of the analog voltage output by the programmable power supply changing over time is the process of the simulated thermal battery voltage being 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 establishment process. The activation time is from the beginning of voltage establishment 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 internally preset thermal battery discharge voltage parameters, thereby realistically simulating the thermal battery activation time and voltage buildup process. The thermal battery activation signal is isolated from the programmable power supply output signal, more realistically simulating real-world usage scenarios. The thermal battery simulation circuit provided in this embodiment also features a self-holding function, enabling more precise control, improving the circuit's response speed and efficiency while reducing overall power consumption.

[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 output terminal of the main control circuit 1, and the second end of the coil Q is connected to the negative output terminal 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 output terminal 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 externally grounded. When there is no activation signal or the self-holding switch 21 is disconnected, the coil Q loses power, connecting the second static terminal of the first single-pole double-throw switch K1 to its dynamic terminal, and the first static terminal of the second single-pole double-throw switch K2 to its dynamic terminal. 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-holding 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 dynamic end, and the second static end of the second single-pole double-throw switch K2 is connected to its dynamic end, the output + of the programmable power supply is connected to the analog voltage output +, and the self-holding circuit 2 continues to output the analog voltage.

[0051] Optionally, Figure 2 In the example, 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-holding switch 21 is disconnected, coil Q loses power, causing the two single-pole single-throw switches to open. This disconnects the output + of the programmable power supply and the analog voltage output +, and self-holding circuit 2 outputs no analog voltage. When there is an activation signal and the self-holding switch 21 is closed, coil Q becomes energized, causing the two single-pole single-throw switches to close. This disconnects the output + of the programmable power supply and the analog voltage output +, and self-holding circuit 2 continuously outputs 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 output terminal of the main control circuit 1, and the second end of the discharge unit 221 is connected to the negative output terminal 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 can 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 further includes: an input terminal 3 and an output terminal 4, wherein the input terminal 3 inputs an activation signal, and the output terminal of the input terminal 3 is connected to the input terminal of the main control circuit 1; the input terminal of the output terminal 4 is connected to the output terminal of the main control circuit 1, and the output terminal of the output terminal 4 is connected to the control terminal 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, which is in communication with the main control circuit 1. An operator can use the industrial computer 6 to transmit the discharge parameters of the thermal battery to be simulated to the main control circuit via the transceiver circuit 5. If the operating voltages, operating currents, and activation times of different thermal batteries to be simulated are not identical, simulation of multiple thermal batteries can be achieved by simply setting and adjusting the parameters using 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 supply, 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 the external power supply voltage.

[0060] Specifically, Figure 4 In the figure, 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 power, 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 further includes: a device housing 8, wherein the device housing has a built-in main control circuit 1 and a self-holding circuit 2, and a self-protection switch 21 embedded in 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. 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. 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. 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 embodiment, 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 work.

[0064] Although the embodiments of the present invention have been described with reference to 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 shall fall 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 programmable 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 terminal of the first single-pole double-throw switch is connected to the second terminal of the self-protection switch, the second static terminal of the first single-pole double-throw switch is suspended, and the dynamic terminal of the first single-pole double-throw switch is connected to the dynamic terminal of the second single-pole double-throw switch and the positive electrode of the output terminal 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 terminal of the first single-pole double-throw switch is connected to its dynamic terminal, and the first static terminal of the second single-pole double-throw switch is connected to its dynamic terminal; 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, among which, 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: 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, among which 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 into 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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