New energy automobile insulation detection teaching experiment device

Abstract

The utility model discloses a new energy automobile insulation detection teaching experiment device, which comprises a box body, a teaching practical training panel is arranged on the upper surface of the box body, a battery module, a high-voltage power-on simulation module and an insulation fault simulation module are arranged in the box body, an interface detection terminal and a switch are arranged on the teaching practical training panel, and the interface detection terminal is connected with the switch. The output end of the battery module is connected with the input end of the high-voltage power-on simulation module, the output end of the high-voltage power-on simulation module is connected with the input end of the insulation fault simulation module, the high-voltage power-on simulation module is further connected with the switch, and the insulation fault simulation module is further connected with the interface detection terminal. Insulation detection of a high-voltage line can be realized without plugging an automobile high-voltage wire harness, teachers can be effectively helped to carry out new energy automobile high-voltage insulation detection teaching practical teaching, students can be effectively helped to carry out operation, the operation process is safe and simple, and the device can be widely applied to the technical field of new energy.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, in particular to a teaching experiment device for insulation detection of new energy vehicles. Background Technique

[0002] In the teaching process of high-voltage detection and fault diagnosis of new energy vehicles, teachers usually need to unplug and plug the high-voltage wiring harness of new energy vehicles and use an insulation detector to detect the insulation of the high-voltage wiring harness. However, in actual teaching, usually multiple students face a new energy vehicle. When performing high-voltage insulation detection, due to the relatively concentrated modules of new energy vehicles, there is less operable space, which is not convenient for teachers to explain to multiple students, and only a small number of students can perform detection at the same time; in addition, when directly operating on new energy vehicles, there are safety hazards for newly learned students and it is also easy to cause damage to the vehicle. Content of the Utility Model

[0003] To solve the above technical problems, the purpose of the utility model is to provide a teaching experiment device for insulation detection of new energy vehicles, which can meet the existing teaching needs and is safe and reliable.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A teaching experiment device for insulation detection of new energy vehicles includes a box body. A teaching training panel is arranged on the upper surface of the box body. A battery module, a high-voltage power-on simulation module and an insulation fault simulation module are arranged in the box body. Interface detection terminals and switches are arranged on the teaching training panel. The output end of the battery module is connected to the input end of the high-voltage power-on simulation module. The output end of the high-voltage power-on simulation module is connected to the input end of the insulation fault simulation module. The high-voltage power-on simulation module is also connected to the switch. The insulation fault simulation module is also connected to the interface detection terminals.

[0006] Further, the high-voltage power-on simulation module includes a power input module, a power conversion module, a relay module and a power output module. The switch and the output end of the battery module are both connected to the input end of the power input module. The output end of the power input module is connected to the input end of the power conversion module. The output end of the power conversion module is connected to the input end of the relay module. The output end of the relay module is connected to the input end of the power output module. The output end of the power output module is connected to the input end of the insulation fault simulation module.

[0007] Further, the power conversion module includes an AC / DC circuit and a DC / DC circuit. The output end of the power input module is connected to the input end of the AC / DC circuit. The output end of the AC / DC circuit is connected to the input end of the DC / DC circuit. The input end of the relay module is connected to the output end of the DC / DC circuit.

[0008] Further, the insulation fault simulation module includes a control chip, an insulation fault module, and a wireless module. The insulation fault module and the wireless module are both connected to the control chip. The input end of the insulation fault module is further connected to the output end of the power output module.

[0009] Further, the insulation fault module includes a plurality of fault relays. The common end of each fault relay is connected to the output end of the power output module. The normally open end of each fault relay is grounded through a resistor.

[0010] Further, the interface detection terminal includes an input terminal, an output terminal, and a jumper plug. The input terminal and the output terminal are connected through the jumper plug. The input terminal and the output terminal are both connected to the insulation fault module through a first connection plug.

[0011] Further, both the input terminal and the output terminal include a screw, a connecting piece, and a nut. The screw is inserted into the teaching and training panel and fixed by the nut. The connecting piece is fixed between the screw and the nut. The connecting piece is used to be electrically connected to the connection plug through soldering.

[0012] Further, the jumper plug includes a first metal pin, a second metal pin, and a detection pin. The detection pin is arranged on the top of the first metal pin and the second metal pin. The first metal pin and the second metal pin are respectively inserted into the screws of the input terminal or the output terminal.

[0013] Further, the box body further includes a box body upper cover. The box body upper cover is hinged to the upper and lower sides of the box body.

[0014] Further, a schematic diagram of a high-voltage circuit of a new energy vehicle is also drawn on the teaching and training panel.

[0015] The beneficial effects of the present utility model are as follows: It includes a box body. A teaching and training panel is arranged on the upper surface of the box body. A battery module, a high-voltage power-on simulation module, and an insulation fault simulation module are arranged inside the box body. Interface detection terminals and switches are arranged on the teaching and training panel. The battery module is used to simulate the power battery of a new energy vehicle. The high-voltage power-on simulation module inputs the power battery into the insulation fault simulation module to simulate the high-voltage power-on process of a new energy vehicle. The insulation fault simulation module is used to set insulation faults. Finally, by unplugging and inserting the interface detection terminals and using an insulation detector for measurement, the insulation of the high-voltage line can be detected. The present utility model can realize the insulation detection of the high-voltage line without unplugging the high-voltage harness of the vehicle, which can effectively help teachers conduct teaching and training on the high-voltage insulation detection of new energy vehicles and students to operate, and the operation process is safe and simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following introduces the drawings required to be used in the embodiments of the present utility model. It should be understood that the drawings introduced below are only for conveniently and clearly expressing some embodiments of the technical solutions in the present utility model. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a structural block diagram of a new energy vehicle insulation detection teaching and experimental device provided by the present utility model;

[0018] Figure 2 It is a side structural schematic diagram of a new energy vehicle insulation detection teaching and experimental device provided by the present utility model;

[0019] Figure 3 It is a structural block diagram of the high-voltage power-on simulation module provided by the present utility model;

[0020] Figure 4 It is a structural block diagram of the insulation fault simulation module provided by the present utility model;

[0021] Figure 5 It is a circuit schematic diagram of the insulation main control chip provided by the present utility model;

[0022] Figure 6 It is a circuit schematic diagram of the insulation fault module provided by the present utility model;

[0023] Figure 7 It is a circuit schematic diagram of the insulation relay control chip provided by the present utility model;

[0024] Figure 8 It is a circuit schematic diagram of the wireless module provided by the present utility model;

[0025] Figure 9 Schematic diagram of the principle for setting insulation faults provided by the present utility model;

[0026] Figure 10 Exploded view of the structure of the input terminal or output terminal provided by the present utility model;

[0027] Figure 11 Assembly diagram of the structure of the input terminal or output terminal provided by the present utility model;

[0028] Figure 12 Schematic diagram of the structure of the jumper plug provided by the present utility model;

[0029] Figure 13 Schematic diagram of the structure of the box body provided by the present utility model.

[0030] Reference numerals: 1, box body; 2, teaching and training panel; 3, upper cover of the box body; 11, battery module; 12, high-voltage power-on simulation module; 13, insulation fault simulation module; 21, input terminal; 22, output terminal; 23, jumper plug; 24, switch; 121, relay module; 122, second connection plug; 131, insulation fault module; 132, wireless module; 133, first connection plug; 211, screw; 212, connecting piece; 213, nut; 231, first metal pin; 232, second metal pin; 233, detection pin; U1, main control chip; U3, relay control chip; J1 to J6, insulation relays; P1 to P6, insulation relay interfaces; P-UART, WIFI module. Detailed implementation manners

[0031] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0032] The power source of new energy vehicles is a high-voltage and large-current circuit. Under normal circumstances, the high-voltage system is a closed system and is completely insulated from the vehicle body. However, it is impossible to rule out the problem of reduced insulation caused by issues such as aging of high-voltage cables, which may lead to vehicle body leakage. Moreover, the working environment of electric vehicles is complex, with rapid changes in vibration, temperature, humidity, and corrosion by acid-base gases, all of which can cause the insulation to be damaged and the overall vehicle insulation performance to decline. The positive and negative leads of the battery form a leakage current loop with the electric chassis through the insulation layer, causing the potential of the electric chassis to rise. This will not only affect the normal operation of low-voltage electrical appliances and the ECUs on the vehicle but may also pose a threat to the personal safety of drivers and passengers. Currently, high-voltage insulation detection is an important knowledge point in schools. The new energy vehicle high-voltage insulation detection teaching experiment device can visually display the manifestation of high-voltage insulation in new energy vehicles, possible problems, and solutions to these problems. It is also a professional tool that can provide training for students and workers.

[0033] In the teaching process of high-voltage detection and fault diagnosis of new energy vehicles, teachers usually need to unplug and plug the high-voltage harness of new energy vehicles and use an insulation detector to detect the insulation of the high-voltage harness. However, in actual teaching, usually multiple students face one new energy vehicle. When conducting high-voltage insulation detection, due to the relatively concentrated modules of new energy vehicles, there is less operable space, which is not convenient for teachers to explain to multiple students. Also, only a small number of students can conduct detections at the same time. To solve this problem, only by purchasing multiple new energy vehicles, which undoubtedly increases the school's expenses and causes a relatively large financial burden. Moreover, when directly conducting practical operations on new energy vehicles, there are safety hazards for newly learning students and it is also easy to cause damage to the vehicles.

[0034] Therefore, the embodiment of the present utility model proposes a new energy vehicle insulation detection teaching experiment device, which includes a box body. The upper surface of the box body is provided with a teaching and training panel. Inside the box body, there are a battery module, a high-voltage power-on simulation module, and an insulation fault simulation module. The teaching and training panel is provided with interface detection terminals and switches. The battery module is used to simulate the power battery of new energy vehicles. The high-voltage power-on simulation module inputs the power battery into the insulation fault simulation module to simulate the high-voltage power-on process of new energy vehicles. The insulation fault simulation module is used to set insulation faults. Finally, by unplugging and plugging the interface detection terminals and using an insulation detector for measurement, the insulation of the high-voltage line can be detected. The present utility model can achieve the insulation detection of high-voltage lines without unplugging the high-voltage harness of the vehicle, which can effectively assist teachers in teaching and training high-voltage insulation detection of new energy vehicles and students in operating, and the operation process is safe and simple.

[0035] Refer to Figure 1 and Figure 2 , Figure 1 is the structural block diagram of the new energy vehicle insulation detection teaching experiment device.Figure 2 It is a schematic side view structure of an insulation detection teaching experiment device for new energy vehicles. A new energy vehicle insulation detection teaching experiment device includes a box body 1. A teaching training panel 2 is arranged on the upper surface of the box body 1. A battery module 11, a high-voltage power-on simulation module 12, and an insulation fault simulation module 13 are arranged inside the box body 1. Interface detection terminals and switches 24 are arranged on the teaching training panel 2. The output end of the battery module 11 is connected to the input end of the high-voltage power-on simulation module 12. The output end of the high-voltage power-on simulation module 12 is connected to the input end of the insulation fault simulation module 13. The high-voltage power-on simulation module 12 is also connected to the switch 24. The insulation fault simulation module 13 is also connected to the interface detection terminals.

[0036] Specifically, the battery module 11 uses 7 lithium battery modules, which are used to simulate the power battery of new energy vehicles and provide working power for other modules.

[0037] The high-voltage power-on simulation module 12 includes the relays required for high-voltage power-on in new energy vehicles, and is provided with 1 start switch and a charging switch connected to the switch 24 on the teaching training panel 2 through a second connection plug 122. The relays can be controlled through buttons to simulate the working logic and principle of high-voltage power-on of new energy vehicles, and input the power of the battery module 11 into the insulation fault simulation module 13.

[0038] The insulation fault simulation module 13 is used to set insulation faults for all high-voltage lines.

[0039] Refer to Figure 3 , Figure 3 It is a structural block diagram of the high-voltage power-on simulation module. Further as an optional implementation, the high-voltage power-on simulation module 12 includes a power input module, a power conversion module, a relay module, and a power output module. The switch 24 and the output end of the battery module 11 are both connected to the input end of the power input module. The output end of the power input module is connected to the input end of the power conversion module. The output end of the power conversion module is connected to the input end of the relay module 121. The output end of the relay module 121 is connected to the input end of the power output module. The output end of the power output module is connected to the input end of the insulation fault simulation module 13.

[0040] Among them, the power input module is used to receive the electrical energy input from the battery module 11, and it is connected to the output end of the battery module 11 and the switch 24 to ensure the safe and stable input of electrical energy.

[0041] The power conversion module is used to convert the DC or AC electrical energy input by the power input module to provide the converted electrical energy for the pre-charge relay, main positive relay, main negative relay, and charging relay 121.

[0042] The relay module includes a pre-charge relay, a main positive relay, a main negative relay, and a charging relay. The pre-charge relay is used to pre-charge the circuit before the high-voltage system is powered on, preventing the system from being impacted by instantaneous large current. The main positive relay and the main negative relay are used to control the on / off of the main circuit of the high-voltage system after the pre-charge circuit is completed, ensuring that the system enters the working state safely and reliably. The charging relay is used to control the on / off of the charging circuit, simulating the charging process of a new energy vehicle.

[0043] The power output module is used to output the converted and pre-processed electrical energy to the insulation fault simulation module 13, simulating the actual working state of the high-voltage system of a new energy vehicle.

[0044] Specifically, when the switch 24 on the teaching training panel 2 is pressed, the power input module receives the electrical energy input from the battery module 11, performs DC conversion through the power conversion module, then closes the pre-charge relay, and pre-charges the high-voltage system through the pre-charge circuit to prevent the system from being impacted by instantaneous large current. After the pre-charge is completed, the main positive relay and the main negative relay are successively closed, the main circuit of the high-voltage system is closed, and the system enters the normal working state. Finally, the charging relay is closed, and the charging circuit is connected, simulating the charging process of a new energy vehicle.

[0045] The entire high-voltage power-on simulation module 12 can accurately simulate the power-on process of the high-voltage system of a new energy vehicle by coordinately controlling the on / off of each relay, providing a reliable experimental environment for teaching experiments such as insulation detection.

[0046] Refer to Figure 3 , as a further optional implementation, the power conversion module includes an AC / DC circuit and a DC / DC circuit. The output end of the power input module is connected to the input end of the AC / DC circuit, the output end of the AC / DC circuit is connected to the input end of the DC / DC circuit, and the input end of the relay module 121 is connected to the output end of the DC / DC circuit.

[0047] Specifically, the power input can be DC (direct current) or AC (alternating current) input. After passing through the AC / DC circuit, it is finally converted into a DC power supply, and then through the DC / DC circuit for boosting to form the positive high-voltage DC VCC and the negative high-voltage DC VDD. VCC outputs power through the main positive relay or the pre-charge relay, and VDD outputs power through the main negative relay.

[0048] Refer to Figure 4 , Figure 4 is the structural block diagram of the insulation fault simulation module. As a further optional implementation, the insulation fault simulation module 13 includes a control chip, an insulation fault module 131, and a wireless module 132. The insulation fault module 131 and the wireless module 132 are both connected to the control chip, and the input end of the insulation fault module 131 is also connected to the output end of the power output module.

[0049] Specifically, the high-voltage power supply is input into the insulation fault module 131. The relay in the insulation fault module 131 can set faults for the input power supply, and is controlled by the control chip according to the instructions received on the wireless module 132. The wireless module 132 can receive instructions sent by wireless devices such as mobile phone terminals and tablet terminals to perform corresponding fault settings.

[0050] Such as Figure 5 shown is the circuit schematic diagram of the insulation main control chip. Such as Figure 7 shown is the circuit schematic diagram of the insulation relay control chip. Among them, the control chip includes the main control chip U1 and the relay control chip U3. The main control chip U1 can select a chip with the model of STC15W404AS, and the relay control chip U3 can select the ULN2003 relay control chip, but it is not limited to this. Such as Figure 6 shown is the circuit schematic diagram of the insulation fault module. The insulation fault module 131 includes insulation relays J1 to J6 and insulation relay interfaces P1 to P6. Such as Figure 8 shown is the circuit schematic diagram of the wireless module. The wireless module 132 is a WIFI module P-UART, and it can adopt the ES8266 module, but it is not limited to this.

[0051] Further as an optional implementation, the insulation fault module 131 includes a plurality of fault relays. The common ends of the respective fault relays are connected to the output end of the power output module, and the normally open ends of the respective fault relays are grounded through resistors.

[0052] Specifically, such as Figure 9 shown is the schematic diagram of the principle of insulation fault setting. The principle of insulation fault setting is to use the relay method for setting. Connect the common end of the fault relay to the high-voltage line, which can be any detection point in the high-voltage circuit schematic diagram of a new energy vehicle. Connect the normally open end of the fault relay to the ground through the resistor R, that is, the outer casing. The resistance value of the resistor R needs to be lower than the minimum requirement of the resistance value allowed for the high-voltage insulation of the new energy vehicle; when there is no fault, the high-voltage line and the outer casing are in an insulated state, and the resistance value between them is higher than the minimum requirement of the resistance value allowed for the high-voltage insulation of the new energy vehicle. When a fault is set, the high-voltage line is connected to the outer casing through the resistor R. At this time, the resistance value between the high-voltage line and the outer casing is lower than the minimum requirement of the resistance value allowed for the high-voltage insulation of the new energy vehicle, that is, it belongs to a high-voltage insulation fault.

[0053] Referring to Figure 2 , further as an optional implementation, the interface detection terminal includes an input terminal 21, an output terminal 22, and a jumper plug 23. The input terminal 21 and the output terminal 22 are connected through the jumper plug 23, and both the input terminal 21 and the output terminal 22 are connected to the insulation fault module 131 through the first connection plug 133.

[0054] Specifically, an input terminal 21 and an output terminal 22 are fixed on the teaching training panel 2. Among them, the input terminal 21 represents the voltage input end, and the output terminal 22 represents the voltage output end. A jumper plug 23 is used to connect them to form a path. The teaching training panel 2 includes multiple such structures, which together form the high-voltage circuit of a new energy vehicle, so as to facilitate detecting whether it is a fault at the voltage input end or the voltage output end by disconnecting a certain line in the circuit. Through this method, it is possible to quickly determine which module in the high-voltage circuit of the new energy vehicle has a high-voltage insulation fault.

[0055] Refer to Figure 10 and Figure 11 , Figure 10 FIG. is the structural disassembly diagram of the input terminal or the output terminal. Figure 11 FIG. is the structural splicing diagram of the input terminal or the output terminal. Further, as an optional implementation, both the input terminal 21 and the output terminal 22 include a screw 211, a connecting piece 212, and a nut 213. The screw 211 is inserted into the teaching training panel 2 and fixed by the nut 213. The connecting piece 212 is fixed between the screw 211 and the nut 213. The connecting piece 212 is used to be electrically connected to the connecting plug through soldering.

[0056] Specifically, both the input terminal 21 and the output terminal 22 include a screw 211, a connecting piece 212, and a nut 213. The screw 211 can be measured by the test lead of a multimeter and fixed in the teaching training panel 2 through the nut 213. The connecting piece 212 can solder the lines connected from other modules.

[0057] Refer to Figure 12 , Figure 12 FIG. is the structural schematic diagram of the jumper plug. Further, as an optional implementation, the jumper plug 23 includes a first metal pin 231, a second metal pin 232, and a detection pin 233. The detection pin 233 is arranged on the top of the first metal pin 231 and the second metal pin 232. The first metal pin 231 and the second metal pin 232 are respectively inserted into the screw 211 in the input terminal 21 or the output terminal 22.

[0058] Specifically, the lower part of the jumper plug 23 has two metal pins, and the upper part of the jumper plug 23 has a detection pin 233. The two metal pins and the detection pin 233 are internally connected to each other. Its function is to connect the input terminal 21 and the output terminal 22 and is used to connect or disconnect the high-voltage line.

[0059] Refer to Figure 13 , Figure 13 FIG. is the structural schematic diagram of the box body. Further, as an optional implementation, the box body 1 further includes a box body upper cover 3, and the box body upper cover 3 is hinged to the upper and lower sides of the box body 1.

[0060] Specifically, a box cover 3 is also hinged to the box body 1, and the box cover 3 is hinged to the upper and lower sides of the box body 1.

[0061] Furthermore, a fixed connection handle (not shown in the figure) is also provided on the outer side of the box body 1, which is convenient for teachers or students to move the entire device.

[0062] Referring to Figure 13 , further as an optional implementation, a schematic diagram of the high-voltage circuit of a new energy vehicle is also drawn on the teaching and training panel 2.

[0063] Specifically, the schematic diagram of the high-voltage circuit of a new energy vehicle on the teaching and training panel 2 can facilitate teachers to explain the principles of new energy vehicles and the operations of insulation faults to students. The relay on the insulation fault module 131 has 20 fault points, which can be used to set insulation faults for all high-voltage lines. The high-voltage lines are connected to the input terminal 21 and the output terminal 22 corresponding to the schematic diagram of the high-voltage circuit of a new energy vehicle on the teaching and training panel 2 through the first connection plug 133, so that it has the function of detection and is convenient for measurement.

[0064] In summary, the teaching operation process of a new energy vehicle insulation detection teaching experiment device of the present utility model is as follows: when a teacher is teaching or a student is training, the device is placed on a tabletop, and the start switch is clicked. At this time, through the high-voltage power-on control logic of the high-voltage power-on simulation module, the power supply of the power battery is input into the insulation fault simulation module to simulate the high-voltage power-on process of a new energy vehicle. Then, the teacher or the student can set insulation faults by connecting the wireless module of the device through a mobile device. Finally, by unplugging and inserting the jumper plug and using an insulation detector for measurement, the insulation of the high-voltage line can be detected.

[0065] Compared with the existing teaching experiment devices, the present utility model has the following advantages:

[0066] First, it can not only realize the detection of the insulation of high-voltage wire harnesses, but also does not require unplugging the high-voltage wire harnesses of the vehicle, which can effectively improve the safety of the experimental process and reduce the occurrence of safety hazards such as electric shock.

[0067] Second, it provides functions of high-voltage power-on simulation and insulation fault simulation, which helps teachers to conduct teaching and training on the high-voltage insulation detection of new energy vehicles and students to operate, and allows multiple students to perform detections at the same time, meeting the existing teaching needs.

[0068] Third, the operation process is safe and reliable.

[0069] In the description of the present utility model, the meaning of "a number of" is one or more, the meaning of "a plurality of" is two or more, and understandings such as "greater than", "less than", "exceeding", etc. do not include the corresponding number, while understandings such as "above", "below", "within", etc. include the corresponding number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features or implicitly specifying the sequence relationship of the indicated technical features.

[0070] In the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0071] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0072] The above has specifically described the preferred embodiments of the present utility model, but the present utility model is not limited to the described embodiments. Those skilled in the art can also make various equivalent deformations or substitutions without departing from the spirit of the present utility model, and these equivalent deformations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. An insulation detection teaching experiment device for new energy vehicles, characterized in that: It includes a box body, on the upper surface of which a teaching and training panel is provided. Inside the box body, a battery module, a high-voltage power-on simulation module and an insulation fault simulation module are provided. On the teaching and training panel, interface detection terminals and switches are provided. The output end of the battery module is connected to the input end of the high-voltage power-on simulation module, the output end of the high-voltage power-on simulation module is connected to the input end of the insulation fault simulation module, the high-voltage power-on simulation module is also connected to the switch, and the insulation fault simulation module is also connected to the interface detection terminals.

2. The insulation detection teaching experiment device for a new energy vehicle according to claim 1, wherein: The high-voltage power-on simulation module includes a power input module, a power conversion module, a relay module and a power output module. The switch and the output end of the battery module are both connected to the input end of the power input module. The output end of the power input module is connected to the input end of the power conversion module. The output end of the power conversion module is connected to the input end of the relay module. The output end of the relay module is connected to the input end of the power output module. The output end of the power output module is connected to the input end of the insulation fault simulation module.

3. The insulation detection teaching experiment device for a new energy vehicle according to claim 2, characterized in that: The power conversion module includes an AC / DC circuit and a DC / DC circuit. The output end of the power input module is connected to the input end of the AC / DC circuit. The output end of the AC / DC circuit is connected to the input end of the DC / DC circuit. The input end of the relay module is connected to the output end of the DC / DC circuit.

4. A new energy vehicle insulation detection teaching experiment device according to claim 2, characterized in that: The insulation fault simulation module includes a control chip, an insulation fault module and a wireless module. The insulation fault module and the wireless module are both connected to the control chip. The input end of the insulation fault module is also connected to the output end of the power output module.

5. The insulation detection teaching experiment device for a new energy vehicle according to claim 4, characterized in that: The insulation fault module includes a plurality of fault relays. The common end of each fault relay is connected to the output end of the power output module. The normally open end of each fault relay is grounded through a resistor.

6. The insulation detection teaching experiment device for a new energy vehicle according to claim 4, wherein: The interface detection terminals include input terminals, output terminals and jumper plugs. The input terminals and the output terminals are connected through the jumper plugs. The input terminals and the output terminals are both connected to the insulation fault module through first connection plugs.

7. An insulation detection teaching experiment device for a new energy vehicle according to claim 6, characterized in that: Both the input terminals and the output terminals include screws, connecting pieces and nuts. The screws are inserted into the teaching and training panel and fixed by the nuts. The connecting pieces are fixed between the screws and the nuts. The connecting pieces are used to be electrically connected to the connection plugs through soldering.

8. An insulation detection teaching experiment device for a new energy vehicle according to claim 6, characterized in that: The jumper plug includes a first metal pin, a second metal pin and a detection pin. The detection pin is arranged on the tops of the first metal pin and the second metal pin. The first metal pin and the second metal pin are respectively inserted into the screws in the input terminals or the output terminals.

9. The insulation detection teaching experiment device for a new energy vehicle according to claim 1, wherein: The box body also includes a box body upper cover, which is hinged to the upper and lower sides of the box body.

10. A new energy vehicle insulation detection teaching experiment device according to claim 1, characterized in that: The teaching and training panel is also drawn with a high-voltage circuit schematic diagram of a new energy vehicle.

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