Vehicle voltage measuring device

Abstract

This disclosure provides a voltage measuring device for a vehicle, relating to the field of vehicle technology. The voltage measuring device includes: a first connector having a first terminal and a second terminal; a second connector having a third terminal, a fourth terminal, a first acquisition terminal, and a second acquisition terminal. The first terminal and the third terminal are connected via a first wire, and the second terminal and the fourth terminal are connected via a second wire. The first connector is used to connect to the vehicle's power supply, and the second connector is used to connect to the vehicle's electric drive assembly. The first acquisition terminal is connected to the third terminal, and the second acquisition terminal is connected to the fourth terminal. This improves the safety of high-voltage ripple testing of vehicles.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle technology, and more specifically, to a voltage measuring device for a vehicle. Background Technology

[0002] With the increasing popularity and development of vehicles, researching the high-voltage safety performance of the entire vehicle is of paramount importance. High-voltage ripple testing is one of the indicators for evaluating the high-voltage safety performance of a vehicle.

[0003] The safety of high-voltage ripple testing for existing vehicles needs to be improved.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] This disclosure provides a voltage measuring device for vehicles that improves the safety of high-voltage ripple testing of vehicles.

[0006] This disclosure provides a voltage measuring device for a vehicle, comprising:

[0007] The first connector has a first terminal and a second terminal;

[0008] The second connector has a third terminal, a fourth terminal, a first acquisition terminal, and a second acquisition terminal. The first terminal is connected to the third terminal via a first wire, and the second terminal is connected to the fourth terminal via a second wire. The first connector is used to connect to the power supply of the vehicle, and the second connector is used to connect to the electric drive assembly of the vehicle. The first acquisition terminal is connected to the third terminal, and the second acquisition terminal is connected to the fourth terminal.

[0009] In one embodiment of this disclosure, the voltage measuring device further includes a switching element having a first connection terminal, a second connection terminal, a first measuring terminal, and a second measuring terminal;

[0010] The first terminal is connected to the first connection terminal via the first wire, the second connection terminal is connected to the third terminal via the first wire, the first measuring terminal is connected to the first connection terminal, the second measuring terminal is connected to the second connection terminal, and the switch is used to control the on / off connection between the first connection terminal and the second connection terminal.

[0011] In one embodiment of this disclosure, the voltage measuring device further includes an insulating box, the switching element is fixed inside the insulating box, and the first wire extends into the insulating box.

[0012] In one embodiment of this disclosure, the insulating box includes a base plate, a side plate, and a cover plate; the base plate is connected to the side plate, the side plate is disposed around the base plate, and the cover plate is detachably connected to the side plate on the side away from the base plate.

[0013] In one embodiment of this disclosure, the switching element further includes a power supply terminal for connecting to an external power source, and the switching element is further configured to control the connection / disconnection between the first connection terminal and the second connection terminal under the control of the external power source.

[0014] In one embodiment of this disclosure, the first connector includes a housing, a first electrode, and a second electrode;

[0015] The first electrode is connected to the first terminal, and the second electrode is connected to the second terminal. The first terminal, the second terminal, the first electrode, and the second electrode are fixed to the housing. The housing has a first socket and a second socket. The first socket exposes the first electrode, and the second socket exposes the second electrode. The vehicle's power supply has a connector for engaging with the first socket and the second socket and connecting through the first electrode and the second electrode.

[0016] In one embodiment of this disclosure, the second connector includes a housing and a connector base;

[0017] The connector is fixed to the housing and has a third terminal, a fourth terminal, a first acquisition terminal, and a second acquisition terminal. The third terminal, the fourth terminal, the first acquisition terminal, and the second acquisition terminal are located inside the housing. The first wire extends into the housing and connects to the third terminal, and the second wire extends into the housing and connects to the fourth terminal.

[0018] In one embodiment of this disclosure, the connector further includes a first insert and a second insert, the first insert being connected to the third terminal and the second insert being connected to the fourth terminal. The electric drive assembly of the vehicle has a mating member, and the first insert and the second insert are used to connect with the mating member.

[0019] In one embodiment of this disclosure, the housing is connected to a first through post, the first wire passes through the first through post and is connected to the third terminal, and the second wire passes through the first through post and is connected to the fourth terminal.

[0020] In one embodiment of this disclosure, the insulating box is connected to a second threaded post, and the first wire passes through the second threaded post and is connected to the first connection end and the second connection end respectively.

[0021] In one embodiment of this disclosure, the first measuring end is connected to a first measuring interface, the second measuring end is connected to a second measuring interface, and the first measuring interface and the second measuring interface extend out of the insulating box.

[0022] In one embodiment of this disclosure, the first acquisition terminal is connected to a first acquisition interface, and the second acquisition terminal is connected to a second acquisition interface, with the first acquisition interface and the second acquisition interface extending out of the housing.

[0023] In one embodiment of this disclosure, the end diameter of the first conductor is smaller than the diameter of the middle portion of the first conductor, and the end diameter of the second conductor is smaller than the diameter of the middle portion of the second conductor.

[0024] The voltage measuring device for vehicles disclosed herein connects the first connector to the vehicle's power supply and the second connector to the vehicle's electric drive assembly, thereby connecting the voltage measuring device in series with the vehicle's high-voltage circuit. Operators can connect measuring instruments to the first and second acquisition terminals to measure the vehicle's high-voltage ripple without breaking the high-voltage circuit wiring harness, reducing the possibility of high-voltage wiring harness leakage, improving the safety and efficiency of high-voltage ripple measurement, and reducing damage to the vehicle.

[0025] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of the voltage measuring device in one embodiment of this disclosure.

[0028] Figure 2 This is a partial structural diagram of the insulating box in a voltage measuring device with the cover plate removed, according to one embodiment of the present disclosure.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. First connector; 11. Housing; 12. First socket; 13. Second socket; 2. Second connector; 21. Box body; 211. First acquisition interface; 212. Second acquisition interface; 22. Connector; 221. First insert; 222. Second insert; 3. Switch; 4. First wire; 5. Second wire; 6. Insulation box; 61. Second wire post; 62. First measurement interface; 63. Second measurement interface; 64. Power supply interface. Detailed Implementation

[0031] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0032] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0033] High-voltage ripple in a vehicle is a voltage superposition phenomenon caused by the switching of semiconductor power devices inside high-voltage components. Voltage ripples at different frequencies couple and amplify in the vehicle's high-voltage grid, causing safety hazards such as abnormal overcurrent and device overheating. High-voltage ripple needs to be collected from the vehicle's high-voltage circuit. Due to insulation requirements, the vehicle's high-voltage circuit is tightly wrapped. Testing high-voltage ripple requires breaking through the high-voltage wiring harness, which may lead to leakage during the test, affecting the safety of the high-voltage ripple test.

[0034] To address the aforementioned problems, this disclosure provides a voltage measuring device for a vehicle, used to measure the high-voltage ripple of the vehicle. See also... Figure 1 The voltage measuring device includes a first connector 1 and a second connector 2. The first connector 1 has a first terminal and a second terminal; the second connector 2 has a third terminal, a fourth terminal, a first acquisition terminal, and a second acquisition terminal. The first terminal and the third terminal are connected via a first wire 4, and the second terminal and the fourth terminal are connected via a second wire 5. The first connector 1 is used to connect to the vehicle's power supply, and the second connector 2 is used to connect to the vehicle's electric drive assembly. The first acquisition terminal is connected to the third terminal, and the second acquisition terminal is connected to the fourth terminal.

[0035] In the embodiments of this disclosure, by connecting the first connector 1 to the vehicle's power supply and the second connector 2 to the vehicle's electric drive assembly, a voltage measuring device is connected in series with the vehicle's high-voltage circuit. Operators can connect measuring instruments to the first and second acquisition terminals to measure the vehicle's high-voltage ripple without breaking the high-voltage circuit wiring harness, reducing the possibility of high-voltage wiring harness leakage, improving the safety and efficiency of high-voltage ripple measurement, and reducing damage to the vehicle.

[0036] In one embodiment of this disclosure, the measuring instrument can be a data acquisition instrument, oscilloscope, spectrum analyzer, digital multimeter, etc., and is not limited thereto, as long as it can measure the high voltage ripple of the vehicle.

[0037] In one embodiment of this disclosure, the vehicle can be a new energy vehicle, a hybrid energy vehicle, or a conventional energy vehicle. The vehicle's power source can be a battery pack for a new energy vehicle or a battery for a conventional energy vehicle. The electric drive assembly can include drive devices such as a motor, a motor controller, and a reducer.

[0038] In one embodiment of this disclosure, see Figure 1 and Figure 2 The voltage measuring device also includes a switch 3. The switch 3 has a first connection terminal, a second connection terminal, a first measuring terminal, and a second measuring terminal; wherein the first terminal is connected to the first connection terminal via a first wire 4, the second connection terminal is connected to the third terminal via a first wire 4, the first measuring terminal is connected to the first connection terminal, and the second measuring terminal is connected to the second connection terminal. The switch 3 is used to control the connection between the first and second connection terminals. On one hand, by connecting the first connection 1 to the vehicle's power supply and the second connection 2 to the vehicle's electric drive assembly, the voltage measuring device can be connected in series in the vehicle's high-voltage circuit. Measuring instruments can be connected to the first and second acquisition terminals to measure the vehicle's high-voltage ripple. On the other hand, by opening and closing the switch 3, the connection between the first and second connection terminals can be controlled, causing a load dump phenomenon in the high-voltage circuit. Operators can connect measuring instruments to the first and second acquisition terminals to measure the load dump voltage at the vehicle's power supply end, and to the second measurement and acquisition terminals to measure the load dump voltage at the vehicle's electric drive assembly end. This facilitates the measurement of the vehicle's high-voltage load dump voltage and improves the applicability of the voltage measuring device. It should be noted that there are two first wires 4. The first terminal is connected to the first connection terminal through one of the first wires 4, and the third terminal is connected to the second connection terminal through the other first wire 4.

[0039] In one embodiment of this disclosure, the polarity of the first terminal, the third terminal, the first connection terminal, the first acquisition terminal, and the first measurement terminal is positive, and the polarity of the second terminal, the fourth terminal, the second connection terminal, the second acquisition terminal, and the second measurement terminal is negative.

[0040] In one embodiment of this disclosure, see Figure 1 and Figure 2 The switch 3 also has a power supply terminal for connecting to an external power source. The switch 3 is also used to control the connection between the first and second connection terminals under the control of the external power source. For example, the switch 3 can be a relay, which can control the connection between the first and second connection terminals under the control of the external power source, thus simulating the load dumping phenomenon of a high-voltage circuit. As another example, the switch 3 can also be a mechanical switch, where the connection between the first and second connection terminals is controlled by manually pressing the switch.

[0041] In one embodiment of this disclosure, see Figure 1 and Figure 2 The voltage measuring device also includes an insulating box 6. The switch 3 is fixed inside the insulating box 6, and the first wire 4 extends into the insulating box 6. For example, the switch 3 can be fixed inside the insulating box 6 by bolt connection, by adhesive bonding, or by snap-fit.

[0042] Furthermore, the insulating box 6 can be in the shape of a cube, cylinder, prism, frustum, or irregular spatial geometry. For example, the insulating box 6 may include a base plate, side plates, and a cover plate, which together form a cubic structure with a side length of 15cm. The base plate and side plates are integrally connected, with the side plates surrounding the base plate. The cover plate is detachably connected to the side plates on the side furthest from the base plate. This allows the insulating box 6 to be opened for easy replacement and maintenance in case of a fault in the switch component 3.

[0043] Furthermore, the cover plate and side plate can be detached by means of bolt connection, snap-fit ​​connection, or latch connection.

[0044] Furthermore, the insulating box 6 can be made of a high-voltage resistant insulating material. For example, the insulating box 6 can be made of insulating materials such as polyvinyl chloride and polytetrafluoroethylene, or an insulating coating can be applied to the surface of the insulating box 6. The insulating box 6 can withstand a high voltage of 1500V.

[0045] Furthermore, the insulating box 6 is connected to a second threaded post 61, through which the first conductor 4 passes and connects to the first connecting end and the second connecting end respectively. The side plate of the insulating box 6 may have a through hole with a diameter of 20mm, into which the second threaded post 61 can extend. The second threaded post 61 may include a connecting section, a clamping section, and a nut. The connecting section is connected to the clamping section, and the clamping section and the connecting section form a threading cavity (for example, the inner diameter of the threading cavity may be 15mm). The connecting section is threadedly connected to the side plate of the insulating box 6. The nut may be fitted onto the clamping section and threadedly connected to the clamping section, so that the clamping section can contract. The first conductor 4 can extend into the insulating box 6 through the threading cavity. The clamping section can apply a clamping force to the first conductor 4 to fix the first conductor 4.

[0046] Furthermore, a rubber sleeve can be provided on the inner wall of the clamping section to reduce the impact on the first conductor 4 and improve the service life of the first conductor 4.

[0047] In one embodiment of this disclosure, see Figure 1 and Figure 2 The first measuring end is connected to a first measuring interface 62 via a lead wire, and the second measuring end is connected to a second measuring interface 63 via a lead wire. Both the first measuring interface 62 and the second measuring interface 63 extend out of the insulating box 6 and are fixed to the side plate of the insulating box 6. Both the first measuring interface 62 and the second measuring interface 63 can be banana plug connectors. In this way, operators can connect measuring instruments through the first measuring interface 62 and the second measuring interface 63, facilitating the measurement of high-voltage load dumping voltage in vehicles.

[0048] In one embodiment of this disclosure, see Figure 1 and Figure 2 The power supply terminal of the switch 3 is connected to a power supply interface 64 via a lead wire. The power supply interface 64 extends out of the insulating box 6 and is fixed to the side plate of the insulating box 6. The power supply interface 64 can be a banana plug interface. In this way, the operator can connect an external power source through the power supply interface 64 to easily supply power to the switch 3.

[0049] In one embodiment of this disclosure, see Figure 1The first connector 1 includes a housing 11, a first electrode, and a second electrode. The first electrode is connected to a first terminal, and the second electrode is connected to a second terminal. The first terminal, the second terminal, the first electrode, and the second electrode are fixed inside the housing 11. The housing 11 has a first socket 12 and a second socket 13. The first socket 12 exposes the first electrode, and the second socket 13 exposes the second electrode. The vehicle's power supply has a connector for engaging with the first socket 12 and the second socket 13 and connecting through the first electrode and the second electrode. This facilitates the connection between the first connector 1 and the connector, enabling the voltage measuring device to be connected in series to the high-voltage circuit. The connector can be a high-voltage base for the vehicle, which has a plug that is inserted into the first socket 12 and the second socket 13. In some other embodiments of this disclosure, the first electrode and the second electrode of the first connector 1 can extend out of the housing 11 to form a plug, and the first socket 12 and the second socket 13 are provided on the connector to form a socket. The plug and socket are connected to achieve the connection between the first connector 1 and the vehicle's power supply.

[0050] In one embodiment of this disclosure, see Figure 1 and Figure 2 The second connector 2 includes a housing 21 and a connector 22. The connector 22 is fixed to the housing 21 and has a third terminal, a fourth terminal, a first acquisition terminal, and a second acquisition terminal. The third terminal, the fourth terminal, the first acquisition terminal, and the second acquisition terminal are located inside the housing 21. A first wire 4 extends into the housing 21 and connects to the third terminal, and a second wire 5 extends into the housing 21 and connects to the fourth terminal. In this way, the connection points of the wires (e.g., the first wire 4 and the second wire 5) and the terminals (e.g., the third terminal, the fourth terminal, the first acquisition terminal, and the second acquisition terminal) can be located inside the housing 21 to improve safety.

[0051] Furthermore, the material of the housing 21 can be a high-voltage resistant insulating material. For example, the material of the housing 21 can be insulating materials such as polyvinyl chloride and polytetrafluoroethylene, or an insulating coating can be applied to the surface of the housing 21. The housing 21 can withstand a high voltage of 1500V.

[0052] Furthermore, the connector 22 also has a first insert 221 and a second insert 222. The first insert 221 is connected to a third terminal, and the second insert 222 is connected to a fourth terminal. The vehicle's electric drive assembly has a mating component, and the first insert 221 and the second insert 222 are used to connect with the mating component. The mating component can be a high-voltage plug of the vehicle, which has a socket. The first insert 221 and the second insert 222 can be inserted into the socket to realize the second connector 2 connected in series in the high-voltage circuit. In some other embodiments of this disclosure, the connector 22 can have a socket, and the mating component can have inserts that can be inserted into the socket to realize the connection between the second connector 2 and the mating component.

[0053] Furthermore, the housing 21 is connected to a first through-hole post, the structure of which is the same as that of the second through-hole post 61. The first wire 4 passes through the first through-hole post and connects to the third terminal, and the second wire 5 passes through the first through-hole post and connects to the fourth terminal, so as to fix the first wire 4 and the second wire 5.

[0054] Furthermore, a rubber sleeve can be provided on the inner wall of the second wire threading post 61 to reduce the impact on the first wire 4 and the second wire 5 and improve the service life of the first wire 4 and the second wire 5.

[0055] In one embodiment of this disclosure, a first acquisition terminal is connected to a first acquisition interface 211 via a lead wire, and a second acquisition terminal is connected to a second acquisition interface 212 via a lead wire. The first acquisition interface 211 and the second acquisition interface 212 extend out of the housing 21 and are fixed to the side plate of the housing 21. The first acquisition interface 211 and the second acquisition interface 212 can be banana plug interfaces. Thus, operators can connect measuring instruments through the first acquisition interface 211 and the second acquisition interface 212, facilitating the acquisition of high-voltage ripple from vehicles.

[0056] In one embodiment of this disclosure, see Figure 1 and Figure 2 The diameter of the end of the first wire 4 is smaller than the diameter of the middle portion of the first wire 4, and the diameter of the end of the second wire 5 is smaller than the diameter of the middle portion of the second wire 5. In other words, the first wire 4 may include a first sub-wire, a second sub-wire, and a third sub-wire connected in sequence. The diameters of the first wire 4 and the third wire are smaller than the diameter of the second wire 5, and the second wire 5 has the same structure as the first wire 4. This allows the first wire 4 and the second wire 5 to be connected to the first connector 1, the second connector 2, and the switch 3.

[0057] In one embodiment of this disclosure, the voltage measuring device can be fixed to the vehicle using tools such as cable ties or ropes to improve the stability of the vehicle voltage measurement process.

[0058] This disclosure also provides a method for using a voltage measuring device for a vehicle:

[0059] Step S1: Fix the voltage measuring device to the vehicle;

[0060] Step S2: Connect the first connector 1 to the vehicle's power supply, connect the second connector 2 to the vehicle's electric drive assembly, and connect the external power supply to the power supply terminal.

[0061] Step S3: Connect the measuring instrument to the first acquisition interface 211 and the second acquisition interface 212 to realize the high voltage ripple measurement of the vehicle.

[0062] Step S4: Control switch 3 disconnects the first connection terminal and the second connection terminal, connects the measuring instrument to the first measuring interface 62 and the second acquisition interface 212 to realize the load dump voltage measurement of the vehicle's power supply terminal, connects the measuring instrument to the second measuring interface 63 and the second acquisition interface 212 to realize the load dump voltage measurement of the vehicle's electric drive component terminal, thereby realizing the load dump voltage measurement of the entire vehicle's high-voltage circuit.

[0063] Step S5: After the voltage measurement is completed, remove the entire voltage measuring device from the vehicle.

[0064] It should be noted that the method of using the vehicle voltage measuring device provided in this disclosure is not limited to the order of steps in the embodiments of this disclosure, and the order of steps can be changed or some steps can be canceled as needed.

[0065] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A voltage measuring device of a vehicle, characterized by, The voltage measuring device includes: The first connector has a first terminal and a second terminal; The second connector has a third terminal, a fourth terminal, a first acquisition terminal, and a second acquisition terminal. The first terminal is connected to the third terminal via a first wire, and the second terminal is connected to the fourth terminal via a second wire. The first connector is used to connect to the power supply of the vehicle, and the second connector is used to connect to the electric drive assembly of the vehicle. The first acquisition terminal is connected to the third terminal, and the second acquisition terminal is connected to the fourth terminal.

2. The voltage measuring device of a vehicle according to claim 1, characterized by The voltage measuring device further includes a switching element, which has a first connection terminal, a second connection terminal, a first measuring terminal, and a second measuring terminal; The first terminal is connected to the first connection terminal via the first wire, the second connection terminal is connected to the third terminal via the first wire, the first measuring terminal is connected to the first connection terminal, the second measuring terminal is connected to the second connection terminal, and the switch is used to control the on / off connection between the first connection terminal and the second connection terminal.

3. The voltage measuring device of a vehicle according to claim 2, characterized by The voltage measuring device also includes an insulating box, the switching element is fixed inside the insulating box, and the first wire extends into the insulating box.

4. The voltage measuring device of a vehicle according to claim 3, characterized by The insulating box includes a base plate, a side plate, and a cover plate; the base plate is connected to the side plate, the side plate is arranged around the base plate, and the cover plate is detachably connected to the side plate on the side away from the base plate.

5. The voltage measuring device of a vehicle according to claim 3, characterized by The switching element also has a power supply terminal for connecting to an external power source, and the switching element is also used to control the connection and disconnection between the first connection terminal and the second connection terminal under the control of the external power source.

6. The voltage measuring device of a vehicle according to claim 1, characterized by The first connector includes a housing, a first electrode, and a second electrode; The first electrode is connected to the first terminal, and the second electrode is connected to the second terminal. The first terminal, the second terminal, the first electrode, and the second electrode are fixed to the housing. The housing has a first socket and a second socket. The first socket exposes the first electrode, and the second socket exposes the second electrode. The vehicle's power supply has a connector for engaging with the first socket and the second socket and connecting through the first electrode and the second electrode.

7. The voltage measuring device of a vehicle according to claim 1, characterized by The second connector includes a housing and a connector base; The connector is fixed to the housing and has a third terminal, a fourth terminal, a first acquisition terminal, and a second acquisition terminal. The third terminal, the fourth terminal, the first acquisition terminal, and the second acquisition terminal are located inside the housing. The first wire extends into the housing and connects to the third terminal, and the second wire extends into the housing and connects to the fourth terminal.

8. The voltage measuring device of a vehicle according to claim 7, characterized by The connector also has a first insert and a second insert, the first insert being connected to the third terminal and the second insert being connected to the fourth terminal. The electric drive assembly of the vehicle has a mating component, and the first insert and the second insert are used to connect with the mating component.

9. The voltage measuring device of a vehicle according to claim 7, characterized by The box is connected to a first through post, the first wire passes through the first through post and is connected to the third terminal, and the second wire passes through the first through post and is connected to the fourth terminal.

10. The voltage measuring device for a vehicle according to claim 3, characterized in that, The insulating box is connected to a second threaded post, and the first wire passes through the second threaded post and is connected to the first connection end and the second connection end respectively.

11. The voltage measuring device for a vehicle according to claim 3, characterized in that, The first measuring end is connected to a first measuring interface, and the second measuring end is connected to a second measuring interface. The first measuring interface and the second measuring interface extend out of the insulating box.

12. The voltage measuring device for a vehicle according to claim 7, characterized in that, The first acquisition end is connected to a first acquisition interface, and the second acquisition end is connected to a second acquisition interface. The first acquisition interface and the second acquisition interface extend out of the housing.

13. The voltage measuring device for a vehicle according to any one of claims 1 to 12, characterized in that, The diameter of the end of the first conductor is smaller than the diameter of the middle portion of the first conductor, and the diameter of the end of the second conductor is smaller than the diameter of the middle portion of the second conductor.

Images