Battery pack and wiring harness board assembly

Abstract

The application provides a battery pack and a wire harness plate assembly. The battery pack comprises a box body, a plurality of battery cells and a wire harness plate assembly. The wire harness plate assembly is arranged on the battery cells and has a first side away from the battery cells and a second side for abutting the battery cells. The wire harness plate assembly comprises an insulating plate, a collecting piece and at least one detection assembly. The insulating plate is provided with a detection opening and a connecting opening. The position of the connecting opening is configured to correspond to the position of the pole of the plurality of battery cells. The collecting piece is arranged on the first side of the insulating plate. The detection assembly comprises a detection unit and a detection bracket. The detection bracket comprises a fixed part and a containing part which are fixedly connected. The fixed part is fixedly arranged on the second side of the insulating plate. The containing part is located in the detection opening and is configured to form a containing area with the battery cells. The detection unit is arranged in the containing area and is electrically connected to the collecting piece. The top surface of the containing area is in contact with the detection unit, so that the detection unit is kept in the containing area and is not easy to move.

Description

Technical Field

[0001] This application relates to the field of batteries, specifically to a battery pack and wiring harness assembly. Background Technology

[0002] With the rapid development of the electric vehicle industry, the electrification trend of powertrains is becoming increasingly apparent. The battery pack, as the core power source of an electric vehicle, is a crucial component. An electric vehicle's battery pack typically consists of many individual batteries connected in series and parallel. Its efficiency, driving range, and long-term reliability under harsh conditions directly impact the overall performance and safety of the vehicle.

[0003] In the battery pack of new energy vehicles, in addition to individual battery cells, a wiring harness assembly is also required. The wiring harness assembly includes busbars and detection components. The busbars are used to connect the individual battery cells in series, and the detection components are used to detect signals such as voltage and temperature during battery operation, transmitting the information to the BMS management system so that the BMS management system can monitor the operating status of the individual battery cells.

[0004] In existing wiring harness board assemblies, some detection units are glued to the surface of the battery cells, resulting in unreliable connections. Under prolonged vibration conditions, cracks can easily form between the detection units and the battery cells, thus affecting the accuracy of the detection results. Utility Model Content

[0005] In view of this, the present application aims to provide a battery pack and wiring harness assembly to solve the problem that in existing wiring harness assemblies, some detection units are glued to the surface of the battery cells, resulting in unreliable connections. Under long-term vibration conditions, cracks easily occur between the detection units and the battery cells, thus affecting the accuracy of the detection results.

[0006] The first aspect of this application provides a battery pack, including

[0007] The housing has a storage space inside.

[0008] Multiple battery cells, each of which is disposed within the housing space of the casing;

[0009] A wiring harness assembly is disposed over the battery cell and has a first side away from the battery cell and a second side for contacting the battery cell.

[0010] The wire harness assembly includes:

[0011] An insulating plate having detection openings, wherein the positions of the connection openings are configured to correspond to the positions of the terminals of multiple battery cells;

[0012] A collection element, wherein the collection element is disposed on a first side of the insulating plate;

[0013] At least one detection component, the detection component including a detection unit and a detection bracket, the detection bracket including a fixed part and a receiving part fixedly connected, the fixed part being fixedly disposed on the second side of the insulating plate, the receiving part being located within the detection opening and configured to form a receiving area with the battery cell, the detection unit being disposed in the receiving area and electrically connected to the acquisition element, the top surface of the receiving area being in contact with the detection unit.

[0014] Another aspect of this application provides a wiring harness assembly that is disposed over a battery cell and has a first side away from the battery cell and a second side for attaching to the battery cell.

[0015] The wire harness assembly includes:

[0016] An insulating board, wherein the insulating board is provided with a detection opening;

[0017] A collection element, wherein the collection element is disposed on a first side of the insulating plate;

[0018] At least one detection component, the detection component including a detection unit and a detection bracket, the detection bracket including a fixed part and a receiving part fixedly connected, the fixed part being fixedly disposed on the second side of the insulating plate, the receiving part being located within the detection opening and configured to form a receiving area with the battery cell, the detection unit being disposed in the receiving area and electrically connected to the acquisition element, the top surface of the receiving area being in contact with the detection unit.

[0019] In the wiring harness assembly of the battery pack in this application embodiment, since the detection unit is disposed in the receiving area between the fixed part and the battery cell, and the top surface of the receiving area is in contact with the detection unit, even under long-term vibration conditions, the detection unit can always remain in a fixed position in the receiving area, and the position is not easy to move, thereby effectively improving the accuracy of the detection results obtained by the detection unit. Attached Figure Description

[0020] Figure 1 A perspective view of a battery pack according to an embodiment of this application is shown;

[0021] Figure 2 A schematic diagram of the first side of the wire harness board assembly according to an embodiment of this application is shown;

[0022] Figure 3 A schematic diagram of the second side of the wire harness board assembly according to an embodiment of this application is shown;

[0023] Figure 4A schematic diagram of the first side portion of the wire harness board assembly according to an embodiment of this application is shown;

[0024] Figure 5 A perspective view of the first side portion of the wire harness board assembly according to an embodiment of this application is shown;

[0025] Figure 6 A schematic diagram of the second side portion of the wire harness board assembly according to an embodiment of this application is shown;

[0026] Figure 7 A perspective view of the fixing portion of the wire harness board assembly according to an embodiment of this application is shown;

[0027] Figure 8 A cross-sectional schematic diagram of a wire harness board assembly according to an embodiment of this application is shown;

[0028] Figure 9 A schematic diagram of the insulating plate of the wire harness board assembly according to an embodiment of this application is shown.

[0029] Attached image labels:

[0030] 100. Wiring harness assembly; 10. Insulating board; 11. Connection opening; 12. Detection opening; 20. Data acquisition component; 30. Electrical connection board; 41. Detection unit; 42. Detection bracket; 421. Fixing part; 4211. First part; 4212. Second part; 4213. Fixing post; 4214. Clearance hole; 4215. Heat dissipation hole; 422. Receiving part; 4221. Opening; 50. Voltage detection component; 200. Housing; 300. Battery cell. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this application. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0033] Many specific details are set forth in the following description to provide a full understanding of this application. However, this application can be implemented in many other ways than those described herein, and those skilled in the art can make similar extensions without departing from the spirit of this application; therefore, this application is not limited to the specific embodiments disclosed below. Techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification.

[0034] The terminology used in one or more embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the one or more embodiments of this application. The singular forms “a,” “the,” and “the” used in one or more embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” used in one or more embodiments of this application refers to and includes any or all possible combinations of one or more associated listed items.

[0035] It should be understood that although the terms first, second, etc., may be used to describe various information in one or more embodiments of this application, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first may also be referred to as second without departing from the scope of one or more embodiments of this application, and similarly, second may also be referred to as first. Depending on the context, the word “if” as used herein may be interpreted as “when”, “in response to a determination”, or “upper”, “lower”, “front”, “back”, “left”, “right”, etc., are used only to indicate the relative positional relationship between related parts, and not to limit the absolute position of these related parts. In this document, “equal”, “same”, etc., are not strict mathematical and / or geometric limitations, and also include errors that are understandable to those skilled in the art and permissible in manufacturing or use. Unless otherwise stated, numerical ranges in this document include not only the entire range within its two endpoints, but also several sub-ranges contained therein.

[0036] like Figure 1 As shown, this application embodiment provides a battery pack, which includes: a housing 200, a plurality of battery cells 300, and a wiring harness assembly 100. The housing 200 has a receiving space; each battery cell 300 is disposed within the receiving space of the housing 200. Figures 2 to 9 As shown, the wiring harness assembly 100 is disposed on the battery cell 300 and has a first side away from the battery cell 300 and a second side for attaching with the battery cell 300. That is, when the wiring harness assembly 100 is installed in the battery pack, the first side is away from the corresponding battery cell 300, and the second side is attached to the corresponding battery cell 300, thereby electrically connecting with each battery pack.

[0037] Specifically, such as Figure 2 and Figure 3 As shown, the wire harness assembly 100 includes an insulating plate 10, a collection element 20, and at least one detection element.

[0038] The insulating board 10 is used to provide mounting locations for other structures and is made of an insulator itself or is composed of plate-shaped components covered with insulating film or insulating coating.

[0039] like Figure 9 As shown, the insulating plate 10 is provided with a detection opening 12. The detection opening 12 is mainly used to arrange the detection unit 41 in the detection assembly.

[0040] In one embodiment of this application, the insulating plate 10 is provided with a plurality of connection openings 11, the positions of which are configured to correspond to the positions of the terminals of a plurality of battery cells 300; the wiring harness assembly 100 further includes a plurality of electrical connection plates 30, each of which is located on a first side of the insulating plate 10 and covers the connection openings 11, and is configured to be electrically connected to the battery cells 300.

[0041] The acquisition unit 20 is mainly used to acquire and transmit electrical signals, such as Figure 2 and Figure 8 As shown, the collecting element 20 is disposed on the first side of the insulating plate 10, that is, on the side of the insulating plate 10 away from the battery cell 300.

[0042] Each electrical connection plate 30 is located on the first side of the insulating plate 10 and covers the connection opening 11, and is configured to be electrically connected to the battery cell 300. This electrical connection plate 30 can be made of conductive metals such as aluminum or copper. During the assembly of the battery pack, it can be directly welded to the terminal portion of the battery cell 300 using processes such as laser welding, thereby achieving a stable connection. Figure 2 As shown, the electrical connection plate 30 at the edge can only be electrically connected to the positive or negative terminal of one battery cell 300, while the electrical connection plate 30 at the middle position is connected in series with the positive and negative terminals of two adjacent battery cells 300. In this way, by connecting multiple battery cells 300 in series, a battery pack can be formed.

[0043] The detection assembly includes a detection unit 41 and a detection bracket 42. The detection unit 41 is used to acquire relevant parameters when the battery is working, and the detection bracket 42 is used to limit the battery cell, playing a protective and limiting role.

[0044] Specifically, such as Figures 4 to 8As shown, the detection bracket 42 includes a fixing part 421 and a receiving part 422 that are fixedly connected. The fixing part 421 is fixedly disposed on the second side of the insulating plate 10, that is, the side of the insulating plate 10 that is in contact with the battery cell 300, so as to fix the detection bracket 42 and the insulating plate 10 to each other. The receiving part 422 is located in the detection opening 12 and is configured to form a receiving area with the battery cell 300. The detection unit 41 is disposed in the receiving area and is electrically connected to the acquisition element 20. The top surface of the receiving area is in contact with the detection unit 41.

[0045] Therefore, in the wiring harness assembly 100 of this application embodiment, since the detection unit 41 is disposed in the receiving area between the fixing part 421 and the battery cell 300, and the top surface of the receiving area is in contact with the detection unit 41, even under long-term vibration conditions, the detection unit 41 can always remain in a fixed position in the receiving area, and the position is not easy to move, thereby effectively improving the accuracy of the detection results obtained by the detection unit 41.

[0046] In one embodiment of this application, the thickness of the receiving portion 422 ranges from 0.5 mm to 3 mm. This ensures the structural strength of the receiving portion 422, prevents the receiving portion 422 from deforming under the reaction force of the detection unit 41 and failing to press the detection unit 41, and also minimizes the thickness of the receiving portion 422.

[0047] It is understandable that the detection unit 41 can be in direct contact with the top surface of the receiving area, or it can be indirect contact through other structures, as long as the top surface of the receiving area can press the detection unit 41 tightly without creating gaps.

[0048] In one embodiment of this application, a buffer pad is provided between the detection unit 41 and the top surface of the receiving area, and the detection unit 41 contacts the receiving area through the buffer pad. Because a buffer pad is provided between the detection unit 41 and the top surface of the receiving area, and the detection unit 41 contacts the receiving area through the buffer pad, the buffer pad can both press the detection unit 41 firmly and prevent damage to the detection unit 41.

[0049] like Figure 7 As shown, in one embodiment of this application, the fixing part 421 includes a first part 4211 and a second part 4212, which are respectively fixedly disposed on both sides of the receiving part 422. That is, both the first part 4211 and the second part 4212 are fixed to the insulating plate 10, which can further improve the firmness of the connection between the detection bracket 42 and the insulating plate 10, avoid relative movement between the detection bracket 42 and the insulating plate 10, and thus ensure that the receiving part 422 and the detection unit 41 are not easily moved relative to the insulating plate 10 or other structural positions.

[0050] like Figures 4 to 7As shown, in one embodiment of this application, positioning posts are provided on the first part 4211 and the second part 4212 of the fixing part 421. The positioning posts are configured to penetrate the insulating plate 10 and the electrical connection plate 30 to fix the detection bracket 42, the insulating plate 10 and the electrical connection plate 30 to each other.

[0051] During the installation of the testing bracket 42, the fixing posts 4213 on the first and second parts 4211 and 4212 of the fixing part 421 can penetrate the fixing part 421 and the electrical connection plate 30 from the second side of the insulating plate 10, so that the testing bracket 42, the insulating plate 10 and the electrical connection plate 30 can be fixed together by the fixing posts 4213.

[0052] It is understandable that after the fixing part 421 and the electrical connection plate 30 penetrate through the second side of the insulating plate 10 of the fixing post 4213, the fixing post 4213 can be reinforced by riveting, thereby further improving the firmness of the fixed connection between the detection bracket 42, the insulating plate 10 and the electrical connection plate 30.

[0053] It is understandable that in areas where the detection bracket 42 is not set, relevant positioning posts can also be set on the insulating plate 10 to limit the position of the electrical connection plate 30 and prevent the electrical connection plate 30 from moving relative to the insulating plate 10 before it is fixedly connected to the battery cell 300.

[0054] In one embodiment of this application, the receiving portion 422 is configured such that its projection on the detection unit 41 is constructed to completely cover the detection unit 41. In this way, when the detection unit 41 is located between the receiving portion 422 and the battery cell 300, the receiving portion 422 can further limit the detection unit 41 and prevent the detection unit 41 from moving.

[0055] In another embodiment of this application, the receiving portion 422 is configured such that its projection on the detection unit 41 covers at least 1 / 3 of the area of ​​the detection unit 41. Since the projection of the receiving portion 422 on the detection unit 41 covers at least 1 / 3 of the area of ​​the detection unit 41, it is understood that the battery cell 300 generates some heat during operation. This heat, when transferred to the detection unit 41, can easily cause the detection unit 41 to overheat. Because the projection of the receiving portion 422 on the detection unit 41 covers at least 1 / 3 of the area of ​​the detection unit 41, the position of the detection unit 41 can be effectively defined while minimizing the impact on the heat dissipation of the detection unit 41, thus preventing the detection unit 41 from overheating.

[0056] like Figure 8As shown, in one embodiment of this application, in the thickness direction of the wire harness plate assembly 100, the first side of the receiving portion 422 protrudes from the first side of the first side of the electrical connection plate 30, and the protrusion height is a first height h. The distance between the first side of the receiving portion 422 and the top cover of the housing 200 is a second height, and the ratio of the first height to the second height is less than 0.5.

[0057] That is, Figure 8 As shown, in the thickness direction of the wire harness plate assembly 100, the first side of the receiving portion 422 protrudes from the first side of the first side of the electrical connection plate 30, which helps to leave space for the detection unit 41 between the receiving portion 422 and the battery cell 300.

[0058] Meanwhile, since the first side of the receiving part 422 protrudes from the first side of the electrical connection plate 30 by a first height h, and the distance between the first side of the receiving part 422 and the top cover of the box 200 is a second height, the ratio of the first height to the second height is less than 0.5. This can effectively prevent the top cover of the box 200 from deforming due to being stepped on, etc. Even if the top cover of the box 200 is slightly deformed, it will not come into contact with the receiving part 422, thus preventing the receiving part 422 from continuing to squeeze the battery cell 300 downward and causing damage to the battery cell 300.

[0059] In another embodiment of this application, in the thickness direction of the wire harness plate assembly 100, the first side of the receiving portion 422 is located on the second side of the first side of the electrical connection plate 30 or is flush with the first side of the electrical connection plate 30, that is, the receiving portion 422 will not protrude to the first side relative to the electrical connection plate 30. In this way, the overall thickness of the wire harness plate assembly 100 in this embodiment of the application can be further reduced, thereby reducing the overall thickness of the battery pack.

[0060] like Figure 5 and Figure 7 As shown, in one embodiment of this application, the receiving portion 422 is provided with openings 4221 on both sides of the extending direction of the collecting member 20; the connecting end of the collecting member 20 is configured to extend into the opening 4221 for electrical connection with the detection unit 41.

[0061] Since the receiving portion 422 has openings 4221 on both sides of the extending direction of the collecting element 20, the connecting end of the collecting element 20 extends into the receiving portion 422 from any one side of the opening 4221 and is electrically connected to the detection unit 41. The extending direction of the connecting end of the collecting element 20 is not limited, which is beneficial for the wire harness board assembly 100 of this embodiment to be compatible with various collecting elements 20. It is understood that the opening 4221 also has a certain heat dissipation function, which is beneficial for the heat dissipation of the detection unit 41.

[0062] In one embodiment of this application, the detection unit 41 is configured to be fixedly disposed on the second side of the receiving portion 422. Since the detection unit 41 is fixedly disposed on the second side of the receiving portion 422, it can be further ensured that under long-term vibration conditions, the detection unit 41 can always remain in a fixed position within the receiving area, and the position will not move, thereby further improving the accuracy of the detection results obtained by the detection unit 41.

[0063] In another embodiment of this application, the detection unit 41 may only be attached to the receiving part 422, and the two are not fixedly connected.

[0064] like Figure 6 and Figure 7 As shown, in one embodiment of this application, a clearance hole 4214 is provided on the fixing part 421. The clearance hole 4214 is configured to correspond to the position of the explosion-proof valve of the battery cell 300. By providing a clearance hole 4214 on the fixing part 421, when the battery cell 300 adjacent to the fixing part 421 experiences thermal runaway and the explosion-proof valve ruptures and ejects a large amount of gas, the gas can be ejected outward through the clearance hole 4214, and the fixing part 421 will not obstruct the flow of gas, thereby further improving the safety of the battery pack operation.

[0065] like Figure 9 As shown, clearance holes are also provided on the insulating component corresponding to the position of the explosion-proof valve of the battery cell 300, so as to avoid obstructing the flow of gas ejected from the battery cell 300.

[0066] like Figure 2 and Figure 4 As shown, in one embodiment of this application, the wire harness board assembly 100 further includes a voltage detection element 50. The electrical connection board 30 is electrically connected to the acquisition element 20 through the voltage detection element 50. The fixing part 421 is provided with heat dissipation holes 4215 corresponding to the position of the voltage detection element 50. The voltage detection element 50 can be a nickel sheet or a related structure, which is not limited here.

[0067] It is understandable that the voltage detection element 50 typically generates a significant amount of heat during the operation of the battery cell 300. By providing heat dissipation holes 4215 at the position corresponding to the voltage detection element 50 on the fixing part 421, the heat dissipation rate of the voltage detection element 50 can be accelerated, preventing the voltage detection element 50 from overheating. Figure 9 As shown, the insulating part is also provided with heat dissipation holes at the position corresponding to the voltage detection element 50, so that it can work together with the heat dissipation holes 4215 of the fixing part 421 to accelerate the heat dissipation speed of the voltage detection element 50 and avoid the voltage detection element 50 from overheating.

[0068] In one embodiment of this application, the detection unit 41 is a temperature detection element, configured to acquire temperature parameters at its location. In the wiring harness assembly 100 of this application embodiment, since the temperature detection element is disposed in the receiving area between the fixing part 421 and the battery cell 300, the temperature detection element can effectively reflect the surface temperature of the battery cell 300 by acquiring the temperature parameters at its location, thereby facilitating timely monitoring of the temperature of the battery cell 300.

[0069] This application embodiment also provides a wire harness board assembly 100, which is disposed on the battery cell 300 and has a first side away from the battery cell 300 and a second side for attaching to the battery cell 300.

[0070] The wire harness assembly 100 includes:

[0071] Insulating plate 10, with detection opening 12 provided on it;

[0072] The collecting element 20 is disposed on the first side of the insulating plate 10;

[0073] At least one detection component, the detection component includes a detection unit 41 and a detection bracket 42, the detection bracket 42 includes a fixing part 421 and a receiving part 422 that are fixedly connected, the fixing part 421 is fixedly disposed on the second side of the insulating plate 10, the receiving part 422 is located in the detection opening 12 and is configured to form a receiving area between the battery cell 300, the detection unit 41 is disposed in the receiving area and is electrically connected to the acquisition element 20, and the top surface of the receiving area is in contact with the detection unit 41.

[0074] In the wiring harness assembly 100 of the battery pack in this embodiment, since the detection unit 41 is disposed in the receiving area between the fixing part 421 and the battery cell 300, and the top surface of the receiving area is in contact with the detection unit 41, even under long-term vibration conditions, the detection unit 41 can always remain in a fixed position within the receiving area, and its position is not easily moved, thereby effectively improving the accuracy of the detection results obtained by the detection unit 41. This embodiment also provides an electrical device including at least one of the aforementioned batteries. It is understood that the electrical device can be various electrical devices such as electric vehicles, battery-powered appliances, and energy storage devices, and is not limited thereto. The electrical device may include the aforementioned battery pack.

[0075] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications or equivalent substitutions made within the spirit and principles of this application should be included within the protection scope of this application.

[0076] Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this application is defined by the appended claims.

Claims

1. A battery pack, characterized in that, include: A housing (200) having an internal storage space; Multiple battery cells (300), each of the battery cells (300) is disposed within the receiving space of the housing (200); A wiring harness assembly (100) is disposed over the battery cell (300) and has a first side away from the battery cell (300) and a second side for contacting the battery cell (300). The wire harness assembly (100) includes: An insulating plate (10) is provided with a detection opening (12); A collection element (20) is disposed on the first side of the insulating plate (10); At least one detection component, the detection component including a detection unit (41) and a detection bracket (42), the detection bracket (42) including a fixing part (421) and a receiving part (422) fixedly connected, the fixing part (421) being fixedly disposed on the second side of the insulating plate (10), the receiving part (422) being located inside the detection opening (12) and configured to form a receiving area between itself and the battery cell (300), the detection unit (41) being disposed in the receiving area and electrically connected to the acquisition element (20), the top surface of the receiving area being in contact with the detection unit (41).

2. The battery pack according to claim 1, characterized in that, The fixing part (421) includes a first part (4211) and a second part (4212), which are respectively fixedly disposed on both sides of the receiving part (422).

3. The battery pack according to claim 2, characterized in that, The insulating plate (10) is provided with a plurality of connection openings (11), the positions of which are configured to correspond to the positions of the terminals of a plurality of battery cells (300); The wiring harness assembly (100) also includes a plurality of electrical connection plates (30), each of which is located on the first side of the insulating plate (10) and covers the connection opening (11), and is configured to be electrically connected to the battery cell (300). Positioning posts are provided on the first split (4211) and the second split (4212). The positioning posts are configured to penetrate the insulating plate (10) and the electrical connection plate (30) to fix the detection bracket (42), the insulating plate (10) and the electrical connection plate (30) to each other.

4. The battery pack according to claim 1, characterized in that, The receiving portion (422) is configured such that its projection on the detection unit (41) is constructed to cover at least 1 / 3 of the area of ​​the detection unit (41).

5. The battery pack according to claim 3, characterized in that, In the thickness direction of the wire harness assembly (100), the first side of the receiving portion (422) protrudes from the first side of the first side of the electrical connection plate (30), and the protrusion height is a first height. The distance between the first side of the receiving portion (422) and the top cover of the housing (200) is a second height. The ratio of the first height to the second height is less than 0.

5.

6. The battery pack according to claim 3, characterized in that, In the thickness direction of the wire harness assembly (100), the first side of the receiving portion (422) is located on the second side of the first side of the electrical connection plate (30) or is flush with the first side of the electrical connection plate (30).

7. The battery pack according to claim 1, characterized in that, The receiving part (422) has openings (4221) on both sides of the extending direction of the collecting member (20); The connection end of the acquisition element (20) is configured to extend into the opening (4221) for electrical connection with the detection unit (41).

8. The battery pack according to claim 1, characterized in that, The detection unit (41) is configured to be fixedly disposed on the second side of the receiving portion (422).

9. The battery pack according to claim 1, characterized in that, The fixing part (421) is provided with a clearance hole (4214), which is configured to correspond to the position of the explosion-proof valve of the battery cell (300).

10. The battery pack according to claim 3, characterized in that, It also includes a voltage detection element (50), the electrical connection plate (30) is electrically connected to the acquisition element (20) through the voltage detection element (50), and the fixing part (421) is provided with heat dissipation holes (4215) corresponding to the position of the voltage detection element (50).

11. The battery pack according to claim 1, characterized in that, The thickness of the receiving portion (422) ranges from 0.5 mm to 3 mm.

12. The battery pack according to claim 1, characterized in that, A buffer pad is provided between the detection unit (41) and the top surface of the receiving area, and the detection unit (41) contacts the receiving area through the buffer pad.

13. The battery pack according to any one of claims 1 to 12, characterized in that, The detection unit (41) is a temperature detection element, which is configured to acquire the temperature parameters of its location.

14. A wire harness board assembly (100), characterized in that, The wiring harness assembly (100) is disposed over the battery cell (300) and has a first side away from the battery cell (300) and a second side for attaching to the battery cell (300). The wire harness assembly (100) includes: An insulating plate (10) is provided with a detection opening (12); A collection element (20) is disposed on the first side of the insulating plate (10); At least one detection component, the detection component including a detection unit (41) and a detection bracket (42), the detection bracket (42) including a fixing part (421) and a receiving part (422) fixedly connected, the fixing part (421) being fixedly disposed on the second side of the insulating plate (10), the receiving part (422) being located inside the detection opening (12) and configured to form a receiving area between itself and the battery cell (300), the detection unit (41) being disposed in the receiving area and electrically connected to the acquisition element (20), the top surface of the receiving area being in contact with the detection unit (41).

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