Simulation device of high-voltage interlocking working condition and high-voltage interlocking test equipment

Abstract

The utility model provides a high-voltage interlocking working condition simulation device and high-voltage interlocking test equipment. Comprising a switch interface module, a working condition interface module, a switch execution module, a working condition execution module, an input module and an output module, wherein the input end of the switch interface module is connected with an HIL, and the output end of the switch interface module is connected with the first input end of the switch execution module; the input end of the working condition interface module is connected with the HIL, and the output end is connected with the input end of the working condition execution module; the output end of the working condition execution module is connected with the second input end of the switch execution module; the first end of the switch execution module is connected with the input module, and the second end is connected with the output module. The device provided by the embodiment of the utility model can solve the difficulty that the BMS high-voltage interlocking compatibility test cannot be carried out on the HIL.

Description

Technical Field

[0001] The utility model relates to the technical field of battery management systems, and in particular to a simulation device for high-voltage interlock working conditions and high-voltage interlock testing equipment. Background Art

[0002] High-voltage interlock is a safety design method that uses low-voltage signals to monitor the integrity of high-voltage circuits. It plays a key role in safety assurance in new energy vehicles. High-voltage interlock testing is also an important safety mechanism that falls into the safety goals of BMS (Battery Management System).

[0003] In the prior art, the BMS control program is connected to a HIL (Hardware in the Loop) bench for testing. However, different simulation test equipments send different high-voltage interlock signals, resulting in inconsistencies in the simulation of the high-voltage interlock signal by each simulation test equipment. Utility Model Content

[0004] The utility model provides a simulation device for a high-voltage interlocking working condition and a high-voltage interlocking test device, which are used to solve the problem that various simulation test devices perform inconsistent simulations on high-voltage interlocking signals.

[0005] The first aspect of the embodiment of the utility model provides a simulation device for a high-voltage interlocking condition, which is deployed between a battery management system BMS and a hardware-in-the-loop simulation system HIL, and includes:

[0006] A switch interface module, a working condition interface module, a switch execution module, a working condition execution module, an input module and an output module; wherein the input end of the switch interface module is connected to the HIL, and the switch interface module receives the switch control signal of the HIL; the output end of the switch interface module is connected to the first input end of the switch execution module, and the switch interface module controls the connection or disconnection of the switch execution module according to the switch control signal of the HIL; the input end of the working condition interface module is connected to the HIL, and the working condition interface module receives the element control signal of the HIL; the output end of the working condition interface module is connected to the input end of the working condition execution module; the working condition The interface module controls the component adjustment of the working condition execution module according to the component control signal; the output end of the working condition execution module is connected to the second input end of the switch execution module; the first end of the switch execution module is connected to the output end of the input module, and the second end of the switch execution module is connected to the input end of the output module; the input end of the input module is connected to the sending port of the low-voltage electrical interface of the BMS; the output end of the output module is connected to the receiving port of the low-voltage electrical interface of the BMS; the input module and the output module complete the simulation of the high-voltage interlocking working condition in response to the connection or disconnection of the switch execution module and the component adjustment of the working condition execution module.

[0007] Optionally, the switch interface module includes: a first interface, a second interface and a third interface; wherein the input end of the first interface is connected to the HIL, and the output end of the first interface is connected to the first input end of the switch execution module; the input end of the second interface is connected to the HIL, and the output end of the second interface is connected to the first input end of the switch execution module; the input end of the third interface is connected to the HIL, and the output end of the third interface is connected to the first input end of the switch execution module.

[0008] Optionally, the operating condition interface module includes: a fourth interface, a fifth interface and a sixth interface; wherein the input end of the fourth interface is connected to the HIL, and the output end of the fourth interface is connected to the first input end of the operating condition execution module; the input end of the fifth interface is connected to the HIL, and the output end of the fifth interface is connected to the second input end of the operating condition execution module; the input end of the sixth interface is connected to the HIL, and the output end of the sixth interface is connected to the third input end of the operating condition execution module.

[0009] Optionally, the switch execution module includes: a first relay, a second relay and a third relay; wherein the control end of the first relay is connected to the output end of the first interface, the first end of the first relay is connected to the input end of the output module, and the second end of the first relay is connected to the output end of the input module; the control end of the second relay is connected to the output end of the second interface, the first end of the second relay is connected to the input end of the output module, and the second end of the second relay is connected to the output end of the input module; the control end of the third relay is connected to the output end of the third interface, the first end of the third relay is connected to the input end of the output module, and the second end of the third relay is connected to the output end of the input module.

[0010] Optionally, the operating condition execution module includes a variable resistor, a voltage-stabilized power supply and a grounding wire; wherein, the control end of the variable resistor is connected to the output end of the fifth interface, the first end of the variable resistor is connected to the second relay, and the second end of the variable resistor is connected to the output end of the voltage-stabilized power supply; the control end of the voltage-stabilized power supply is connected to the output end of the sixth interface; the control end of the grounding wire is connected to the output end of the fourth interface, and the output end of the grounding wire is connected to the first relay.

[0011] Optionally, the output module includes: an output port; wherein the input end of the output port is connected to the first end of the first relay, the first end of the second relay and the first end of the third relay, and the output end of the output port is connected to the receiving end of the low-voltage electrical interface of the BMS.

[0012] Optionally, the input module includes: an input port; wherein the input end of the input port is connected to the second end of the first relay, the second end of the second relay and the third end of the third relay, and the input end of the input port is connected to the transmitting end of the low-voltage electrical interface of the BMS.

[0013] Optionally, the first relay, the second relay and the third relay are normally open contact relays or normally closed contact relays.

[0014] Optionally, the input port and the output port are low voltage electrical interfaces.

[0015] A second aspect of an embodiment of the utility model provides a high-voltage interlock test device, comprising: a hardware-in-the-loop simulation system HIL, and a simulation device of the high-voltage interlock working condition of the first aspect and any item of the first aspect connected to the HIL.

[0016] The embodiment of the utility model provides a simulation device for high-voltage interlock working conditions and a high-voltage interlock testing device. By connecting an independent circuit device in series between a hardware-in-the-loop simulation system HIL and a battery management system BMS, a working condition interface module receives a component control signal from the HIL to control the component adjustment of a working condition execution module. The working condition execution module then uses the component signal and the switch control signal sent by the HIL received by the switch interface module to act on the switch execution module to control the connection or disconnection of the switch execution module. The input module and the output module complete the simulation of the high-voltage interlock working condition in response to the path of the switch execution module, which solves the difficulty of not being able to perform BMS high-voltage interlock compatibility test on the HIL and can fully cover the functional items of BMS testing on the HIL. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0018] Figure 1 A schematic diagram of an application scenario of a device for simulating high-voltage interlocking conditions provided by an embodiment of the utility model;

[0019] Figure 2 A schematic structural diagram of a device for simulating high-voltage interlocking conditions provided in an embodiment of the utility model.

[0020] Reference numerals:

[0021] 1- switch interface module; 11- first interface; 12- second interface; 13- third interface; 2- working condition interface module; 21- fourth interface; 22- fifth interface; 23- sixth interface; 3- switch execution module; 31- first relay; 32- second relay; 33- third relay; 4- working condition execution module; 41- variable resistor; 42- voltage-stabilized power supply; 43- ground wire; 5- input module; 51- input port; 6- output module; 61- output port; 7- HIL; 8- BMS. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" or "laid on" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0024] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0026] The technical terms involved are explained as follows:

[0027] BMS: Battery management system, manages battery cells to prevent overcharging and over-discharging, extends service life, monitors real-time battery status, and collects and processes various battery signals.

[0028] HIL: Hardware-in-the-loop simulation test system, which simulates the operating environment of the object under test by building a simulation model of the controlled object, connects with the controller IO through a real I / O interface, completes IO transmission and reception, so that the controller can judge in a real environment. A system that conducts comprehensive and systematic testing on the controller under test.

[0029] High-voltage interlocking principle: The high-voltage circuit uses the power battery pack as the power source, and the low-voltage circuit also needs a low-voltage signal for detection (sent by the BMS and then received by the high-voltage interlocking circuit). The low-voltage signal is transmitted along the closed low-voltage circuit. Once the low-voltage signal is interrupted, it means that a high-voltage connector may be loose or detached.

[0030] For electric vehicles, the battery management system is the core part to ensure the safety and functional performance of the entire vehicle. The testing and verification of the BMS plays a vital role. At present, the verification of the BMS control program requires HIL testing, among which the high-voltage interlock test is particularly important. In the prior art, the BMS control program is tested by connecting it to the HIL bench. However, different simulation test equipment sends different high-voltage interlock signals, resulting in inconsistent simulations of the high-voltage interlock signal by each simulation test equipment.

[0031] Therefore, in view of the problem of inconsistent simulation of high-voltage interlock signals by various simulation test equipment in the prior art, the utility model proposes the following technical ideas: design a simulation device for high-voltage interlock working conditions, and simulate the physical phenomenon of various typical electrical signal distortions of high-voltage interlock signals through switch interface module, working condition interface module, switch execution module, working condition execution module, input module and output module, so as to quickly and effectively verify whether the high-voltage interlock function of BMS meets the design requirements, shorten the design cycle for BMS development work, reduce development costs, and provide feedback verification conditions for subsequent physical vehicle verification, ensuring the safety, stability and reliability of BMS products. The following is a detailed description using a detailed embodiment.

[0032] refer to Figure 1 , Figure 1 A schematic diagram of the structure of a high-voltage interlocking condition simulation device provided in an embodiment of the utility model. In an embodiment, the high-voltage interlocking condition simulation device is deployed between a battery management system BMS and a hardware-in-the-loop simulation system HIL. The high-voltage interlocking condition simulation device includes:

[0033] Switch interface module 1, working condition interface module 2, switch execution module 3, working condition execution module 4, input module 5 and output module 6.

[0034] The input end of the switch interface module 1 is connected to the HIL 7 , and the output end of the switch interface module 1 is connected to the first input end of the switch execution module 3 .

[0035] In this embodiment, the switch interface module receives a switch control signal from the HIL, and the switch interface module controls the switch execution module to be turned on or off according to the switch control signal from the HIL.

[0036] The input end of the working condition interface module 2 is connected to the HIL 7, and the output end of the working condition interface module 2 is connected to the input end of the working condition execution module 4;

[0037] In this embodiment, the operating condition interface module receives the component control signal of the HIL, and the operating condition interface module controls the component adjustment of the operating condition execution module according to the component control signal.

[0038] The output end of the operating condition execution module 4 is connected to the second input end of the switch execution module 3; the first end of the switch execution module 3 is connected to the output end of the input module 5, and the second end of the switch execution module 3 is connected to the input end of the output module 6; the input end of the input module 5 is connected to the sending port of the low-voltage electrical interface of the BMS 8; the output end of the output module 6 is connected to the receiving port of the low-voltage electrical interface of the BMS 8.

[0039] In this embodiment, the input module and the output module complete the simulation of the high-voltage interlocking condition in response to the connection or disconnection of the switch execution module and the component adjustment of the condition execution module.

[0040] It can be seen from the above embodiments that by connecting an independent circuit device in series between the hardware-in-the-loop simulation system HIL and the battery management system BMS, the operating condition interface module receives the component control signal of the HIL, controls the component adjustment of the operating condition execution module, and the operating condition execution module then uses the component signal and the switch control signal sent by the HIL received by the switch interface module to act on the switch execution module to control the connection or disconnection of the switch execution module. The input module and the output module complete the simulation of the high-voltage interlocking condition in response to the path of the switch execution module, which solves the difficulty of not being able to perform BMS high-voltage interlocking compatibility testing on the HIL and can fully cover the functional items of BMS testing on the HIL.

[0041] refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of a simulation device for high-voltage interlocking conditions provided by an embodiment of the utility model. Figure 2 As shown, the switch interface module 1 includes: a first interface 11 , a second interface 12 and a third interface 13 .

[0042] The input end of the first interface 11 is connected to the HIL, and the output end of the first interface 11 is connected to the first input end of the switch execution module. The input end of the second interface 12 is connected to the HIL, and the output end of the second interface 12 is connected to the first input end of the switch execution module. The input end of the third interface 13 is connected to the HIL, and the output end of the third interface 13 is connected to the first input end of the switch execution module.

[0043] Optionally, the first input end of the switch execution module includes three control ports, namely, a first control port, a second control port and a third control port. Specifically, the output end of the first interface 11 is connected to the first control port, the output end of the second interface 12 is connected to the second control port, and the output short link of the third interface 13 is connected to the third control port.

[0044] Continue to refer Figure 2 In this embodiment, the working condition interface module 2 includes: a fourth interface 21 , a fifth interface 22 and a sixth interface 23 .

[0045] Among them, the input end of the fourth interface 21 is connected to HIL 7, and the output end of the fourth interface 21 is connected to the first input end of the operating condition execution module 4; the input end of the fifth interface 22 is connected to HIL, and the output end of the fifth interface 22 is connected to the second input end of the operating condition execution module 4; the input end of the sixth interface 23 is connected to HIL, and the output end of the sixth interface 23 is connected to the third input end of the operating condition execution module 4.

[0046] Continue to refer Figure 2 In this embodiment, the switch execution module 3 includes: a first relay 31 , a second relay 32 and a third relay 33 .

[0047] Among them, the control end of the first relay 31 is connected to the output end of the first interface 11, the first end of the first relay 31 is connected to the input end of the output module 6, and the second end of the first relay 31 is connected to the output end of the input module 5; the control end of the second relay 32 is connected to the output end of the second interface 12, the first end of the second relay 32 is connected to the input end of the output module 6, and the second end of the second relay 32 is connected to the output end of the input module 5; the control end of the third relay 33 is connected to the output end of the third interface 13, the first end of the third relay 33 is connected to the input end of the output module 6, and the second end of the third relay 33 is connected to the output end of the input module 5.

[0048] In this embodiment, the first relay 31 , the second relay 32 and the third relay 33 are normally open contact relays or normally closed contact relays.

[0049] In this embodiment, the working condition execution module 4 includes a variable resistor 41 , a voltage-stabilized power supply 42 and a grounding wire 43 .

[0050] Among them, the control end of the variable resistor 41 is connected to the output end of the fifth interface 22, the first end of the variable resistor 41 is connected to the second relay 32, and the second end of the variable resistor 41 is connected to the output end of the voltage-stabilized power supply 42; the control end of the voltage-stabilized power supply 42 is connected to the output end of the sixth interface 23; the control end of the grounding wire 43 is connected to the output end of the fourth interface 21, and the output end of the grounding wire 43 is connected to the first relay 31.

[0051] Optionally, the regulated power supply 42 may be 24V.

[0052] Continue to refer Figure 2 In this embodiment, the output module 6 includes an output port 61 .

[0053] The input end of the output port 61 is connected to the first end of the first relay 31 , the first end of the second relay 32 and the first end of the third relay 33 , and the output end of the output port 61 is connected to the receiving end of the low voltage electrical interface of the BMS 8 .

[0054] Continue to refer Figure 2 In this embodiment, the input module 5 includes an input port 51 .

[0055] The input end of the input port 51 is connected to the second end of the first relay 31 , the second end of the second relay 32 and the third end of the third relay 33 , and the input end of the input port 51 is connected to the transmitting end of the low voltage electrical interface of the BMS.

[0056] In this embodiment, the input port 51 and the output port 61 are low voltage electrical interfaces.

[0057] The high-voltage interlock working condition simulation device provided in the above embodiment can simulate working conditions including but not limited to the normal mode of the high-voltage interlock circuit, the short circuit mode to ground, the open circuit and disconnection mode, the short circuit mode to power supply and the electromagnetic interference signal distortion mode. The specific working principle is:

[0058] When simulating the normal mode of the high-voltage interlock loop, the HIL sends a low-level instruction to the first interface, a low-level instruction to the second interface, a high-level instruction to the third interface, a grounding instruction to the fourth interface, an output 0Ω resistance instruction to the fifth interface, and a 24V low-voltage signal instruction to the sixth interface. The first interface sends a low level to the control end of the first relay to control the first relay to remain disconnected, the second interface sends a low-level instruction to the control end of the second relay to control the second relay to remain disconnected, the third interface sends a high-level instruction to the control end of the third relay to control the third relay to close, and the fourth interface sends a 0Ω resistance instruction to the control end of the variable resistor to control the resistance of the variable resistor to be 0.

[0059] When simulating the short-circuit mode to ground of the high-voltage interlocking loop, the HIL sends a high-level instruction to the first interface, a low-level instruction to the second interface, a low-level instruction to the third interface, a grounding instruction to the fourth interface, an output 0Ω resistance instruction to the fifth interface, and a 24V low-voltage signal instruction to the sixth interface. The first interface sends a high level to the control end of the first relay to control the first relay to close, the second interface sends a low-level instruction to the control end of the second relay to control the second relay to remain disconnected, the third interface sends a low-level instruction to the control end of the third relay to control the third relay to disconnect, and the fourth interface sends a 0Ω resistance instruction to the control end of the variable resistor to control the resistance of the variable resistor to be 0.

[0060] When simulating the open circuit disconnection mode of the high-voltage interlocking loop, the HIL sends a low-level instruction to the first interface, sends a low-level instruction to the second interface, sends a low-level instruction to the third interface, sends a grounding instruction to the fourth interface, sends an output 0Ω resistance instruction to the fifth interface, and sends a 24V low-voltage signal instruction to the sixth interface. The first interface sends a low level to the control end of the first relay to control the first relay to disconnect, the second interface sends a low-level instruction to the control end of the second relay to control the second relay to remain disconnected, the third interface sends a low-level instruction to the control end of the third relay to control the third relay to disconnect, and the fourth interface sends a 0Ω resistance instruction to the control end of the variable resistor to control the resistance value of the variable resistor to be 0.

[0061] When simulating the power supply short-circuit mode of the high-voltage interlock loop, the HIL sends a low-level instruction to the first interface, a high-level instruction to the second interface, a low-level instruction to the third interface, a grounding instruction to the fourth interface, an output 0Ω resistance instruction to the fifth interface, and a 24V low-voltage signal instruction to the sixth interface. The first interface sends a low level to the control end of the first relay to control the first relay to disconnect, the second interface sends a high-level instruction to the control end of the second relay to control the second relay to close, the third interface sends a low-level instruction to the control end of the third relay to control the third relay to disconnect, and the fourth interface sends a 0Ω resistance instruction to the control end of the variable resistor to control the resistance of the variable resistor to be 0.

[0062] When simulating the electromagnetic interference signal distortion mode of the high-voltage interlocking loop, the HIL sends a high-level instruction to the first interface, a low-level instruction to the second interface, a low-level instruction to the third interface, a grounding instruction to the fourth interface, an output variable resistance instruction to the fifth interface, and a 24V low-voltage signal instruction to the sixth interface. The first interface sends a high level to the control end of the first relay to control the first relay to close, the second interface sends a low-level instruction to the control end of the second relay to control the second relay to remain disconnected, the third interface sends a low-level instruction to the control end of the third relay to control the third relay to disconnect, and the fourth interface sends a variable resistance instruction to the control end of the variable resistor to control the continuous change of the resistance value of the variable resistor.

[0063] It can be seen from the above embodiments that by switching control instructions on the hardware-in-the-loop simulation system HIL and controlling the simulation device of the high-voltage interlocking condition provided by the utility model to be in different states, the jump of five different working conditions of the high-voltage interlocking loop can be realized, which solves the problem that the high-voltage interlocking compatibility test cannot be performed on the HIL. At the same time, it can quickly and effectively verify whether the high-voltage interlocking function of the battery management system BMS meets the design requirements, thereby ensuring the safety, stability and reliability of the BMS products.

[0064] The utility model also provides a high-voltage interlock test device, comprising a hardware-in-the-loop simulation system HIL, and a simulation device of the high-voltage interlock working condition connected to the HIL.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A simulation device for high-voltage interlocking conditions, characterized in that: Deployed between the battery management system BMS and the hardware-in-the-loop simulation system HIL, including: Switch interface module, working condition interface module, switch execution module, working condition execution module, input module and output module; Wherein, the input end of the switch interface module is connected to the HIL, and the switch interface module receives a switch control signal of the HIL; The output end of the switch interface module is connected to the first input end of the switch execution module, and the switch interface module controls the switching on or off of the switch execution module according to the switch control signal of the HIL; The input end of the working condition interface module is connected to the HIL, and the working condition interface module receives the component control signal of the HIL; the output end of the working condition interface module is connected to the input end of the working condition execution module; the working condition interface module controls the component adjustment of the working condition execution module according to the component control signal; The output end of the operating condition execution module is connected to the second input end of the switch execution module; the first end of the switch execution module is connected to the output end of the input module, and the second end of the switch execution module is connected to the input end of the output module; the input end of the input module is connected to the sending port of the low-voltage electrical interface of the BMS; the output end of the output module is connected to the receiving port of the low-voltage electrical interface of the BMS; the input module and the output module complete the simulation of the high-voltage interlocking condition in response to the connection or disconnection of the switch execution module and the component adjustment of the operating condition execution module.

2. The high voltage interlocking condition simulation device according to claim 1, characterized in that: The switch interface module includes: a first interface, a second interface and a third interface; Among them, the input end of the first interface is connected to the HIL, and the output end of the first interface is connected to the first input end of the switch execution module; the input end of the second interface is connected to the HIL, and the output end of the second interface is connected to the first input end of the switch execution module; the input end of the third interface is connected to the HIL, and the output end of the third interface is connected to the first input end of the switch execution module.

3. The high voltage interlocking condition simulation device according to claim 2, characterized in that: The working condition interface module includes: a fourth interface, a fifth interface and a sixth interface; Among them, the input end of the fourth interface is connected to the HIL, and the output end of the fourth interface is connected to the first input end of the operating condition execution module; the input end of the fifth interface is connected to the HIL, and the output end of the fifth interface is connected to the second input end of the operating condition execution module; the input end of the sixth interface is connected to the HIL, and the output end of the sixth interface is connected to the third input end of the operating condition execution module.

4. The high voltage interlocking condition simulation device according to claim 3, characterized in that: The switch execution module includes: a first relay, a second relay and a third relay; Among them, the control end of the first relay is connected to the output end of the first interface, the first end of the first relay is connected to the input end of the output module, and the second end of the first relay is connected to the output end of the input module; the control end of the second relay is connected to the output end of the second interface, the first end of the second relay is connected to the input end of the output module, and the second end of the second relay is connected to the output end of the input module; the control end of the third relay is connected to the output end of the third interface, the first end of the third relay is connected to the input end of the output module, and the second end of the third relay is connected to the output end of the input module.

5. The high voltage interlocking condition simulation device according to claim 4, characterized in that: The working condition execution module includes a variable resistor, a voltage-stabilized power supply and a ground wire; Among them, the control end of the variable resistor is connected to the output end of the fifth interface, the first end of the variable resistor is connected to the second relay, and the second end of the variable resistor is connected to the output end of the voltage-stabilized power supply; the control end of the voltage-stabilized power supply is connected to the output end of the sixth interface; the control end of the grounding wire is connected to the output end of the fourth interface, and the output end of the grounding wire is connected to the first relay.

6. The high voltage interlocking condition simulation device according to claim 4, characterized in that: The output module comprises: an output port; The input end of the output port is connected to the first end of the first relay, the first end of the second relay and the first end of the third relay, and the output end of the output port is connected to the receiving end of the low-voltage electrical interface of the BMS.

7. The high voltage interlocking condition simulation device according to claim 6, characterized in that: The input module comprises: an input port; The input end of the input port is connected to the second end of the first relay, the second end of the second relay and the third end of the third relay, and the input end of the input port is connected to the transmitting end of the low-voltage electrical interface of the BMS.

8. The high voltage interlocking condition simulation device according to claim 7, characterized in that: The first relay, the second relay and the third relay are normally open contact relays or normally closed contact relays.

9. The high voltage interlocking condition simulation device according to claim 7, characterized in that: The input port and the output port are low voltage electrical interfaces.

10. A high voltage interlock test device, characterized in that: It comprises a hardware-in-the-loop simulation system HIL, and a simulation device for the high-voltage interlocking condition as claimed in any one of claims 1 to 9 connected to the HIL.

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