Insulation and voltage resistance detection system of battery pack

Abstract

The utility model provides an insulation and withstand voltage detection system of a battery pack, the battery pack does not comprise a battery management system control panel, the insulation and withstand voltage detection system of the battery pack comprises an insulation and withstand voltage test device, the insulation and withstand voltage test device is suitable for being electrically connected with the battery pack, and the insulation and withstand voltage test device is used for testing a high voltage and withstand voltage module of the battery pack; the wire harness assembly is suitable for being electrically connected with a low-voltage plug-in of the battery pack; and the voltage stabilizing equipment is electrically connected with the wire harness assembly, and the voltage stabilizing equipment is electrically connected with the battery pack through the wire harness assembly, so that a relay in the battery pack is closed. According to the insulation and voltage resistance detection system of the battery pack, the wiring harness assembly is arranged, the voltage stabilizing device can supply power to the battery pack through the wiring harness assembly, so that insulation and voltage resistance detection can be performed on the battery pack, and meanwhile, the wiring harness assembly is simple in structure and low in cost, so that the use cost can be effectively reduced, and batch use is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of manufacturing technology of insulation withstand voltage testing system for battery packs, and in particular to an insulation withstand voltage testing system for battery packs. Background Technology

[0002] During the insulation withstand voltage test of the battery pack, the battery management system control board is usually removed to protect it. However, this can cause the relays inside the battery pack to fail to close properly, preventing the formation of a complete high-voltage circuit within the battery pack and thus making it impossible to perform withstand voltage tests on the high-voltage circuit of the battery pack. Utility Model Content

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, the present invention provides a battery pack insulation withstand voltage testing system, which can normally perform withstand voltage testing on the battery pack.

[0004] According to an embodiment of the present invention, a battery pack insulation withstand voltage testing system, wherein the battery pack does not include a battery management system control board, includes: an insulation withstand voltage testing device adapted to be electrically connected to the battery pack, the insulation withstand voltage testing device being used to test the high voltage withstand voltage module of the battery pack; a wiring harness assembly adapted to be electrically connected to the low voltage plug of the battery pack; and a voltage regulator electrically connected to the wiring harness assembly, the voltage regulator being electrically connected to the battery pack through the wiring harness assembly to cause a relay within the battery pack to close.

[0005] According to the battery pack insulation withstand voltage testing system of this utility model, a wiring harness assembly is set up. The voltage stabilizing device can supply power to the battery pack through the wiring harness assembly, thereby enabling insulation withstand voltage testing of the battery pack. At the same time, the wiring harness assembly has a simple structure and low cost, which can effectively reduce the cost of use and facilitate mass production.

[0006] According to some embodiments of the present invention, one of the wire harness assembly and the low-voltage plug-in is provided with a plug-in portion and the other is provided with a plug-in hole, and the plug-in portion is plugged into the plug-in hole.

[0007] According to some optional embodiments of the present invention, the plug-in portion has multiple plug interfaces, and the number of plug interfaces corresponds one-to-one with the number of terminals of the low-voltage plug.

[0008] According to some embodiments of the present invention, the insulation withstand voltage testing system of the battery pack includes: a connecting wire, which electrically connects the voltage regulator and the wiring harness assembly.

[0009] According to some optional embodiments of the present invention, the wire diameter of the connecting wire is in the range of 0.4mm-0.6mm.

[0010] According to some embodiments of this utility model, the length of the connecting wire is greater than or equal to 500mm.

[0011] According to some embodiments of this utility model, there are two connecting wires, which are respectively connected to the positive and negative terminals of the voltage regulator.

[0012] According to some embodiments of the present invention, the insulation withstand voltage testing system of the battery pack includes: cable ties, which are used to fix the two connecting wires, and / or the cable ties are cloth-based adhesive tape.

[0013] According to some embodiments of this utility model, the high-voltage withstand module includes a high-voltage wiring harness, a battery module, and electrical components.

[0014] According to some embodiments of the present invention, the wire harness assembly is provided with a limiting protrusion, the limiting protrusion protrudes away from the wire harness assembly along the thickness direction of the wire harness assembly, the low-voltage plug is provided with a limiting groove, and the limiting protrusion is engaged in the limiting groove.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an insulation withstand voltage testing system for a battery pack according to an embodiment of the present utility model;

[0017] Figure 2 yes Figure 1 A schematic diagram of the wire harness assembly and connecting wires shown;

[0018] Figure 3 yes Figure 2 A schematic diagram of the wire harness assembly shown.

[0019] Figure label:

[0020] 100. Battery pack insulation withstand voltage testing system;

[0021] 10. Insulation withstand voltage testing equipment;

[0022] 20. Wiring harness assembly; 21. Connector; 211. Socket; 22. Limiting protrusion;

[0023] 30. Voltage stabilizing equipment;

[0024] 40. Connecting wire;

[0025] 200. Battery pack. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying 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 with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0027] The following is a reference appendix. Figure 1-3 Description of an insulation withstand voltage testing system 100 for a battery pack according to an embodiment of the present invention.

[0028] Reference Figure 1 , Figure 2 and Figure 3 The insulation withstand voltage testing system 100 of the battery pack according to the present invention is used in the battery pack 200, wherein the battery pack 200 does not include the battery management system control board.

[0029] Specifically, the battery pack insulation withstand voltage testing system 100 includes: an insulation withstand voltage testing device 10, a wiring harness assembly 20, and a voltage regulator 30. The insulation withstand voltage testing device 10 is adapted to be electrically connected to the battery pack 200 and is used to test the high-voltage withstand voltage module of the battery pack 200. The wiring harness assembly 20 is adapted to be electrically connected to the low-voltage plug-in of the battery pack 200. The voltage regulator 30 is electrically connected to the wiring harness assembly 20 and is electrically connected to the battery pack 200 through the wiring harness assembly 20 to close the relays inside the battery pack 200.

[0030] For example, such as Figure 1 , Figure 2 and Figure 3 As shown, the insulation withstand voltage test equipment 10 is electrically connected to the high voltage withstand voltage module of the battery pack 200. The high voltage withstand voltage module is the battery disconnection unit of the battery pack 200. The insulation withstand voltage test equipment 10 performs insulation withstand voltage test on the battery disconnection unit of the battery pack 200. The voltage regulator 30 is connected to the battery pack 200 through the wiring harness assembly 20, so that the relay in the battery pack 200 is closed, thereby forming a complete high voltage circuit with the high voltage wiring harness, electrical components and battery module.

[0031] When using the battery pack insulation withstand voltage testing system 100 to perform withstand voltage testing on the high voltage withstand module, the control board of the battery management system is easily damaged by excessive DC voltage (≥DC2800V) during the withstand voltage test. It is necessary to remove the control board of the battery management system. After the control board of the battery management system is removed, the relay of the battery pack 200 cannot close, so the electrical components and battery modules in the battery pack 200 cannot form a complete high voltage circuit. Therefore, the battery pack 200 is powered by the voltage regulator 30 to form a complete high voltage circuit, so that the high voltage withstand module of the battery pack 200 can be tested.

[0032] The battery pack insulation withstand voltage testing system 100 of this utility model includes a wiring harness assembly 20. After the battery management system control board of the battery pack 200 is disassembled, the voltage regulator 30 can supply power to the battery pack 200 through the wiring harness assembly 20, forming a complete high-voltage circuit within the battery pack 200. This allows for insulation withstand voltage testing of the battery pack 200, ensuring the normal operation of the testing process. Furthermore, even with the battery management system control board of the battery pack 200 removed, the insulation withstand voltage testing of the battery pack 200 can be completed using only the wiring harness assembly 20. Compared to existing technologies that require other large components to supply power to the battery pack 200, the wiring harness assembly 20 of this application has a simple structure and low cost, effectively reducing usage costs and facilitating mass production.

[0033] In addition, the wiring harness assembly 20 can be directly connected to the low-voltage plug of the battery pack 200, without having to be directly connected to the main positive and negative copper busbars of the battery module of the battery pack 200, thereby reducing the occurrence of electric shock and ensuring the safety of the testing work.

[0034] The battery pack insulation withstand voltage testing system 100 according to an embodiment of the present invention includes a wiring harness assembly 20. The voltage regulator 30 can supply power to the battery pack 200 through the wiring harness assembly 20, thereby enabling insulation withstand voltage testing of the battery pack 200. At the same time, the wiring harness assembly 20 has a simple structure and low cost, thereby effectively reducing the cost of use and facilitating mass production.

[0035] According to some embodiments of this utility model, refer to Figure 2 and Figure 3One of the wiring harness assembly 20 and the low-voltage plug-in is provided with a plug-in portion 21, and the other is provided with a plug-in hole. That is, the wiring harness assembly 20 can have a plug-in portion 21 and the low-voltage plug-in can have a plug-in hole, or the low-voltage plug-in can have a plug-in portion 21 and the wiring harness assembly 20 can have a plug-in hole. The plug-in portion 21 is plugged into the plug-in hole. Therefore, the plug-in connection structure is simple and easy to install, which can effectively reduce the connection time between the wiring harness assembly 20 and the battery pack 200 and improve the insulation withstand voltage test efficiency.

[0036] According to some embodiments of this utility model, refer to Figure 2 and Figure 3 The plug-in portion 21 is provided on the wiring harness assembly 20. The plug-in portion 21 has multiple plug interfaces 211, that is, the plug-in portion 21 can have two, three, four or more plug interfaces 211. The number of plug interfaces 211 corresponds one-to-one with the number of terminals in the low-voltage plug. Thus, the multiple plug interfaces 211 correspond one-to-one with the terminals in the multiple low-voltage plugs, thereby ensuring that the relays of multiple circuits in the battery pack 200 can close normally, thereby ensuring that the high-voltage circuit of the battery pack 200 forms a complete circuit, and thus ensuring that the insulation withstand voltage test system can normally test the battery pack 200.

[0037] For example, such as Figure 2 and Figure 3 As shown, the connector 21 has twenty-four connectors 211. This specification can be adapted to low-voltage connectors of various battery packs 200 on the market, thereby ensuring the universality of the wiring harness assembly 20.

[0038] According to some embodiments of this utility model, refer to Figure 2 and Figure 3 The battery pack insulation withstand voltage testing system 100 may include a connecting wire 40, which electrically connects the voltage regulator 30 and the wiring harness assembly 20. This facilitates the electrical connection between the voltage regulator 30 and the wiring harness assembly 20, and the connection method is simple, easy to operate, and thus ensures connection efficiency.

[0039] According to some embodiments of this utility model, refer to Figure 2 and Figure 3 The diameter of the connecting wire 40 is in the range of 0.4mm-0.6mm. Therefore, limiting the diameter of the connecting wire 40 can prevent damage caused by excessive load due to an excessively thin wire diameter, and can also prevent increased costs due to an excessively thick wire diameter.

[0040] For example, such as Figure 2 and Figure 3As shown, the wire diameter of the connecting wire 40 can be: 0.4mm, 0.42mm, 0.44mm, 0.46mm, 0.48mm, 0.5mm, 0.52mm, 0.54mm, 0.56mm, 0.58mm or 0.6mm.

[0041] According to some optional embodiments of the present invention, refer to Figure 2 and Figure 3 The length of the connecting wire 40 is greater than or equal to 500mm. This prevents the voltage regulator 30 from being too close to the battery pack 200, which could prevent the voltage regulator 30 from being placed properly, thus ensuring that the voltage regulator 30 can be placed correctly.

[0042] For example, such as Figure 2 and Figure 3 As shown, the length of the connecting wire 40 can be 500mm, 520mm, 540mm, 560mm, 580mm or 600mm.

[0043] According to some embodiments of this utility model, refer to Figure 1 and Figure 2 There are two connecting wires 40, which are connected to the positive and negative terminals of the voltage regulator 30, respectively. This ensures that the voltage regulator 30 can work normally.

[0044] According to some embodiments of this utility model, refer to Figure 1 and Figure 2 The battery pack insulation withstand voltage testing system 100 includes cable ties for securing two connecting wires 40. This allows the connecting wires 40 to be organized, facilitating subsequent inspection and maintenance.

[0045] According to some embodiments of this utility model, refer to Figure 1 and Figure 2 The cable ties are made of cloth tape. Therefore, cloth tape has strong adhesive strength and good flexibility, providing additional fixing force to more firmly secure the connecting wires 40. At the same time, cloth tape is easy to cut and shape, and can be wrapped around the wire harness as needed, even for complex shapes or angles, ensuring that all connecting wires 40 are covered.

[0046] According to some embodiments of this utility model, refer to Figure 1 and Figure 2 The high-voltage withstand module includes a high-voltage wiring harness, a battery module, and electrical components.

[0047] According to some embodiments of this utility model, refer to Figure 1 and Figure 2The wiring harness assembly 20 is provided with a limiting protrusion 22, which protrudes outward from the wiring harness assembly 20 along its thickness direction. The low-voltage plug is provided with a limiting groove, and the limiting protrusion 22 is engaged with the limiting groove. This ensures the connection strength between the wiring harness assembly 20 and the low-voltage plug and effectively prevents the wiring harness assembly 20 from separating from the low-voltage plug.

[0048] For example, such as Figure 2 and Figure 3 As shown, the limiting protrusion 22 is located on the upper side of the wire harness assembly 20 in the thickness direction. The extending direction of the limiting protrusion 22 extends in the same direction as the insertion of the wire harness assembly 20 and the low-voltage plug. Therefore, the engagement between the limiting protrusion 22 and the limiting groove can be completed during the insertion of the wire harness assembly 20 and the low-voltage plug.

[0049] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0051] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0053] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An insulation withstand voltage detection system of a battery pack, the battery pack not including a battery management system control board, characterized by, The application relates to an insulation voltage test device, a wiring harness assembly and a connection line. The application relates to an insulation voltage test device, a wiring harness assembly and a connection line. The wiring harness assembly is electrically connected with one of the low-voltage plug-in components and the other low-voltage plug-in component. The wiring harness assembly is provided with a plurality of plug-in interfaces, and the number of the plug-in interfaces corresponds to the number of the terminals of the low-voltage plug-in components.

2. The insulation withstand voltage detection system of a battery pack according to claim 1, characterized by, The application relates to an insulation voltage test device, a wiring harness assembly and a connection line.

3. The insulation withstand voltage detection system of a battery pack according to claim 2, characterized by, The diameter of the connection line is in the range of 0.4mm-0.6mm.

4. The insulation withstand voltage detection system of the battery pack according to claim 1, characterized by, The length of the connection line is greater than or equal to 500mm. The number of the connection lines is two, and the two connection lines are respectively connected with the positive electrode and the negative electrode of the voltage stabilizing device.

5. The insulation withstand voltage detection system of the battery pack according to claim 4, characterized by, The application relates to an insulation voltage test device, a wiring harness assembly and a connection line.

6. The insulation withstand voltage detection system of the battery pack according to claim 4, characterized by, The high-voltage voltage-withstanding module comprises a high-voltage wiring harness, a battery module and an electrical element.

7. The insulation withstand voltage detection system of the battery pack according to claim 4, characterized by, The wiring harness assembly is provided with a limiting convex part which protrudes away from the wiring harness assembly along the thickness direction of the wiring harness assembly, and the low-voltage plug-in component is provided with a limiting groove, and the limiting convex part is clamped in the limiting groove.

8. The insulation withstand voltage detection system of the battery pack according to claim 4, characterized by, ​ 9. The insulation withstand voltage detection system of the battery pack according to claim 1, characterized by, ​ 10. The insulation withstand voltage detection system of the battery pack according to claim 1, characterized by, ​

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