Battery breaking unit and battery pack

Abstract

The invention provides a battery circuit breaking unit and a battery pack. The battery circuit breaking unit comprises a cover plate, a circuit board, a relay, an electric connecting piece and a supporting piece, the battery circuit breaking unit has a first direction, the cover plate, the circuit board and the relay are sequentially arranged in the first direction, and the circuit board is connected to the cover plate and the relay. The circuit board is provided with a through hole penetrating in the first direction and comprises a first surface, and the first surface is arranged away from the relay; the electric connecting piece is connected to the first surface, and the electric connecting piece penetrates through the through hole and is electrically connected to the relay; the supporting piece is connected to the cover plate, penetrates through the through hole and is connected to the relay. The electrical connector and the support member can share the same through hole, so that the combination of various holes on the circuit board is realized, the number of the holes is reduced, the area of the holes is greatly reduced, the effective area of the circuit board is improved, the circuit layout is facilitated, the electrical clearance and creepage distance of the circuit layout are increased, and the electrical performance is improved.

Description

Technical Field

[0001] This application belongs to the field of battery manufacturing technology, specifically relating to a battery circuit breaker unit and a battery pack. Background Technology

[0002] Battery packs typically include a battery disconnect unit (BDU), which is a circuit protection module within the battery pack and plays a crucial role.

[0003] In the prior art, the battery circuit breaker unit usually includes a cover plate, a circuit board and a relay. When the cover plate is structurally connected to the circuit board and the relay, multiple through holes are usually required on the circuit board for soldering and connection avoidance. Multiple through holes require a large area of ​​the circuit board, making it difficult to lay out the circuit on the circuit board, resulting in a reduction in electrical clearance and creepage distance, or even making it difficult to lay out the circuit. Summary of the Invention

[0004] In view of the above problems, the present invention is proposed to provide a battery circuit breaker unit and battery pack that overcomes the problems of difficult circuit layout, small electrical clearance and creepage distance, and even difficulty in achieving circuit layout in existing circuit boards.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows: In a first aspect, embodiments of this application provide a battery circuit breaker unit, which includes: a cover plate, a circuit board, a relay, an electrical connector, and a support member; The battery circuit breaker unit has a first direction, the cover plate, the circuit board and the relay are arranged along the first direction, the circuit board is located between the cover plate and the relay, and the circuit board is connected to the cover plate and the relay respectively; The circuit board has a through hole extending along the first direction, and the circuit board includes a first surface that is disposed away from the relay. The electrical connector is connected to the first surface, and the electrical connector passes through the through hole and is electrically connected to the relay; The support member is connected to the cover plate and passes through the through hole, and is connected to the relay.

[0006] Optionally, the support member and the electrical connector are spaced apart within the through hole.

[0007] Optionally, the support member is pressed against the electrical connector.

[0008] Optionally, the circuit board includes a central region and an edge region surrounding the central region, and the number of through holes is multiple, with the multiple through holes spaced apart in the edge region.

[0009] Optionally, the relay includes a central region and an edge region surrounding the central region, the central region being provided with wiring, and the number of support members is multiple, with the multiple support members spaced apart in the edge region.

[0010] Optionally, a plurality of the support members are arranged circumferentially around the intermediate region.

[0011] Optionally, the electrical connector includes a nickel sheet and a welding post connected to the nickel sheet; The nickel sheet is connected to the first surface, and the welding post passes through the through hole and is electrically connected to the relay.

[0012] Optionally, the welding column and the support member are spaced apart within the through hole.

[0013] Optionally, the support member is an insulating member or a buffer member.

[0014] Optionally, the battery circuit breaker unit further includes a housing, in which the circuit board, the relay, the electrical connector, and the support are all disposed. The housing has an opening, and the cover plate is connected to the opening.

[0015] Secondly, embodiments of this application provide a battery pack, the battery pack including the aforementioned battery disconnect unit.

[0016] In this embodiment, the battery circuit breaker unit includes: a cover plate, a circuit board, a relay, an electrical connector, and a support member. The battery circuit breaker unit has a first direction, with the cover plate, the circuit board, and the relay arranged along this first direction. The circuit board is located between the cover plate and the relay, and is connected to both the cover plate and the relay. The circuit board has a through hole extending along the first direction, and includes a first surface that faces away from the relay. The electrical connector is connected to the first surface and passes through the through hole, electrically connecting to the relay. The support member is connected to the cover plate and passes through the through hole, connecting to the relay. Thus, the electrical connector enables circuit connection between the circuit board and the relay, while the support member provides stable and reliable support between the relay and the cover plate, preventing excessive pressure on the relay and the circuit board. Furthermore, an electrical connector is provided that connects to the first surface of the circuit board and passes through a through hole extending along the first direction, and a support member is provided that connects to the cover plate and also passes through a through hole extending along the first direction on the circuit board. This allows the electrical connector and the support member to simultaneously pass through the through hole on the circuit board along the first direction, meaning that the electrical connector and the support member can share the same through hole. This achieves the merging of the openings of the electrical connector and the support member on the circuit board, reduces the number of openings on the circuit board, greatly reduces the opening area, increases the effective area of ​​the circuit board, is beneficial for circuit layout, increases the electrical clearance and creepage distance of the circuit layout, and improves electrical performance.

[0017] Additional aspects and advantages of the 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

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is an exploded view of the battery circuit breaker unit described in the embodiments of this application; Figure 2 This is a partial structural schematic diagram of the battery circuit breaker unit described in the embodiments of this application; Figure 3 This is a schematic cross-sectional view of the battery circuit breaker unit described in the embodiments of this application; Figure 4 This is a schematic diagram of the circuit board structure of the battery circuit breaker unit described in the embodiments of this application.

[0019] Reference numerals: 10-cover plate; 20-circuit board; 30-relay; 11-support member; 21-through hole; 22-first surface; 23-electrical connector; 28-intermediate area; 29-edge area; 32-intermediate region; 33-edge region; 24-nickel sheet; 25-welding post; 31-housing; Z-first direction. Detailed Implementation

[0020] Embodiments of the present invention will now be described in detail. Examples of these embodiments are illustrated 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 are only used to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0021] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] Reference Figures 1 to 4The diagram shows a schematic of the structure of a battery circuit breaker unit according to an embodiment of this application. The battery circuit breaker unit may specifically include: a cover plate 10, a circuit board 20, a relay 30, an electrical connector 23, and a support member 11.

[0025] The battery circuit breaker unit has a first direction Z. The cover plate 10, the circuit board 20 and the relay 30 are arranged along the first direction Z. The circuit board 20 is located between the cover plate 10 and the relay 30. The circuit board 20 is connected to the cover plate 10 and the relay 30 respectively. The circuit board 20 has a through hole 21 extending along the first direction Z, and the circuit board 20 includes a first surface 22, which is disposed away from the relay 30.

[0026] Electrical connector 23 is connected to the first surface 22, and electrical connector 23 passes through the through hole 21 and is electrically connected to the relay 30.

[0027] The support member 11 is connected to the cover plate 10 and passes through the through hole 21. The support member 11 is connected to the relay 30.

[0028] In this embodiment, the circuit connection between the circuit board 20 and the relay 30 is achieved through the electrical connector 23, and the support member 11 provides a relatively stable and reliable support between the relay 30 and the cover plate 10, avoiding excessive pressure on the relay 30 and the circuit board 20. Furthermore, the electrical connector 23 is connected to the first surface 22 of the circuit board 20 and passes through a through hole 21 extending along the first direction Z, and the support member 11 is connected to the cover plate 10 and also passes through a through hole 21 extending along the first direction Z on the circuit board 20. This allows the electrical connector 23 and the support member 11 to simultaneously pass through the through hole 21 on the circuit board 20 along the first direction Z, meaning that the electrical connector 23 and the support member 11 can share the same through hole 21. This achieves the merging of the openings of the electrical connector 23 and the support member 11 on the circuit board 20, reducing the number of openings on the circuit board 20, significantly reducing the opening area, increasing the effective area of ​​the circuit board 20, which is beneficial for circuit layout and increases the electrical clearance and creepage distance of the circuit layout.

[0029] Specifically, in this embodiment, the first surface 22 has a thickness, so that the electrical connector 23 can be connected to the first surface 22 in a relatively stable and reliable manner. The specific thickness of the first surface 22 can be set according to actual needs. In this embodiment, the specific thickness value of the first surface 22 is not limited.

[0030] For example, in this embodiment, the first direction Z can be the height direction of the battery circuit breaker unit, that is, the cover plate 10, the circuit board 20, and the relay 30 are arranged along the height direction of the battery circuit breaker unit. The through hole 21 on the circuit board 20 extends along the height direction of the battery circuit breaker unit, so that the support member 11 supports the relay 30 and the cover plate 10 along the height direction of the battery circuit breaker unit, which has a small length dimension and is conducive to product miniaturization. And the electrical connector 23 realizes the circuit connection between the circuit board 20 and the relay 30 along the height direction of the battery circuit breaker unit, which has a short circuit distance and is conducive to circuit transmission.

[0031] In this embodiment, the battery circuit breaker unit includes a housing 31, a circuit board 20, a relay 30, an electrical connector 23, and a support member 11 located inside the housing 31. A cover plate 10 can be connected to the housing 31 to provide closed protection for the circuit board 20, the relay 30, the electrical connector 23, and the support member 11 inside the housing 31.

[0032] Specifically, in this embodiment, the support member 11 is used to provide support between the relay 30 and the cover plate 10. For example, the shape of the support member 11 can be a cuboid, a cube, or a cylinder, etc., and can be set according to actual needs. In this embodiment, the specific shape of the support member 11 is not limited.

[0033] For example, in this embodiment, there can be multiple support members 11 and electrical connectors 23, and correspondingly, there can also be multiple through holes 21 on the circuit board 20. It is possible that several through holes 21 simultaneously house support members 11 and electrical connectors 23, or that several through holes 21 house only support members 11, or that several through holes 21 house only electrical connectors 23. This embodiment does not limit this, and the configuration can be based on the requirements for the electrical connectors 23 and the support members 11.

[0034] Optionally, in this embodiment, the support member 11 and the electrical connector 23 are spaced apart within the through hole 21. This allows the support member 11 and the electrical connector 23 to have displacement space within the through hole 21, resulting in better stability and reducing the likelihood of breakage under stress. It also allows the support member 11 to have deformation space, providing better buffering and energy absorption during the shaking of the battery circuit breaker unit, further improving the structural stability of the battery circuit breaker unit. The specific value of the spacing between the support member 11 and the electrical connector 23 within the through hole 21 is not limited in this embodiment and can be set according to actual needs.

[0035] In this embodiment, optionally, the support member 11 is pressed against the electrical connector 23. This ensures a tight fit between the support member 11 and the electrical connector 23, improving the overall structural rigidity of the support member 11 and the electrical connector 23. Furthermore, the support member 11 reduces the swaying of the electrical connector 23, giving the electrical connector 23 better stability and improving its electrical performance.

[0036] Optionally, in this embodiment, the circuit board 20 includes a central region 28 and an edge region 29 surrounding the central region 28. Multiple through-holes 21 are provided, spaced apart in the edge region 29. This arrangement of multiple through-holes 21 in the edge region 29 of the circuit board 20 helps to distribute stress within the circuit board 20. Specifically, the central region 28 of the circuit board 20 contains wiring, allowing for layout routing. Providing multiple through-holes 21 in the edge region 29 avoids the significant impact on wiring layout that would otherwise occur with openings in the central region 28, optimizing the internal space layout of the circuit board 20 and improving its utilization rate.

[0037] For example, in this embodiment of the application, the middle area 28 of the circuit board 20 refers to the part of the area radiating outward from the center of the circuit board 20, and the edge area 29 refers to the other areas of the circuit board 20 surrounding the middle area 28. In this embodiment of the application, the specific area of ​​the middle area 28 and the edge area 29 is not limited and can be set according to actual needs.

[0038] In this embodiment of the application, for example, the number of through holes 21 can be two, three, four or five, etc., which can be set according to the stress requirements of the circuit board 20 and the number of electrical connectors 23 and support members 11 that need to be set. In this embodiment of the application, the specific number of through holes 21 is not limited.

[0039] Optionally, in this embodiment, the relay 30 includes a central region 32 and an edge region 33 surrounding the central region 32. The central region 32 is provided with wiring, and there are multiple support members 11, which are spaced apart in the edge region 33. Specifically, the multiple support members 11 are respectively inserted through the cover plate 10 into multiple through holes 21 on the circuit board 20 and connected to the edge region 33 of the relay 30. Since the support members 11 are located in the edge region 33, the support members 11 are not allowed to affect the wiring in the central region 32, resulting in better wiring stability. Furthermore, by distributing the stress area of ​​the relay 30 in the edge region 33 with multiple support members 11, stress concentration is reduced. Compared with the related technology where the support members 11 are located in the center of the relay 30, the stress distribution of the relay 30 is optimized, and the structural stability of the relay 30 is improved.

[0040] For example, in the embodiments of this application, the number of support members 11 can be two, three, four or five, etc., and can be set according to actual needs such as the support requirements of relay 30. The specific number of support members 11 in the embodiments of this application is not limited.

[0041] Optionally, in this embodiment, multiple support members 11 are spaced apart circumferentially around the central region 32. This allows the multiple support members 11 to further evenly distribute the clamping force on the relay 30 around its circumferential position, balancing stress distribution and preventing damage to the relay 30 due to localized stress concentration. For example, the multiple support members 11 can be evenly distributed or symmetrically distributed, etc. This embodiment does not limit the specific distribution of the multiple support members 11.

[0042] In this embodiment, optionally, the electrical connector 23 includes a nickel sheet 24 and a welding post 25 connected to the nickel sheet 24; the nickel sheet 24 is connected to the first surface 22, and the welding post 25 passes through the through hole 21 and is electrically connected to the relay 30. Specifically, the nickel sheet 24 has a sheet-like structure, which allows for a relatively stable and reliable connection when the electrical connector 23 is in surface-to-surface contact with the first surface 22 of the circuit board 20. Welding the nickel sheet 24 to the first surface 22 of the circuit board 20 away from the relay 30 provides good connection reliability. For example, the welding post 25 can be a copper post or other material. The welding post 25 passes through the through hole 21 of the circuit board 20 and is welded to the relay 30, achieving a relatively stable and reliable connection between the electrical connector 23 and the relay 30, thus improving connection stability.

[0043] Optionally, in this embodiment, the welding column 25 and the support member 11 are spaced apart within the through hole 21. Specifically, this allows the support member 11 and the welding column 25 to have displacement space within the through hole 21, resulting in better stability and reduced likelihood of breakage under stress. It also provides deformation space for the support member 11, providing a better buffering and energy absorption effect, and improving the structural stability of the battery circuit breaker unit. In this embodiment, the specific value of the spacing between the support member 11 and the welding column 25 within the through hole 21 is not limited and can be set according to actual needs.

[0044] In this embodiment, the support member 11 may optionally be an insulating member or a buffer member. This provides the support member 11 with better insulation, preventing electrical interference with the electrical connector 23. Alternatively, it provides the support member 11 with better energy absorption and buffering effects, improving the structural stability of the battery circuit breaker unit.

[0045] For example, in the embodiments of this application, the material of the support member 11 can be rubber, silicone block, polyurethane or polyamide, etc., and can be set according to actual needs. The material of the support member 11 is not limited in the embodiments of this application.

[0046] Optionally, in this embodiment, the battery circuit breaker unit further includes a housing 31. The circuit board 20, relay 30, electrical connector 23, and support member 11 are all disposed within the housing 31. The housing 31 has an opening, and a cover plate 10 is connected to the opening. In this way, the housing 31 provides housing space and protection for the circuit board 20, relay 30, electrical connector 23, and support member 11, and the cover plate 10 connected to the opening of the housing 31 encloses the circuit board 20, relay 30, electrical connector 23, and support member 11 within the housing 31, preventing other external structures from affecting the structural and electrical performance of the battery circuit breaker unit.

[0047] In summary, the battery circuit breaker unit described in the embodiments of this application may include at least the following advantages: In this embodiment, the battery circuit breaker unit includes: a cover plate, a circuit board, a relay, an electrical connector, and a support member. The battery circuit breaker unit has a first direction, with the cover plate, the circuit board, and the relay arranged along this first direction. The circuit board is located between the cover plate and the relay, and is connected to both the cover plate and the relay. The circuit board has a through hole extending along the first direction, and includes a first surface that faces away from the relay. The electrical connector is connected to the first surface and passes through the through hole, electrically connecting to the relay. The support member is connected to the cover plate and passes through the through hole, connecting to the relay. Thus, the electrical connector enables circuit connection between the circuit board and the relay, while the support member provides stable and reliable support between the relay and the cover plate, preventing excessive pressure on the relay and the circuit board. Furthermore, an electrical connector is provided that connects to the first surface of the circuit board and passes through a through hole extending along the first direction, and a support member is provided that connects to the cover plate and also passes through a through hole extending along the first direction on the circuit board. This allows the electrical connector and the support member to simultaneously pass through the through hole on the circuit board along the first direction, meaning that the electrical connector and the support member can share the same through hole. This achieves the merging of the openings of the electrical connector and the support member on the circuit board, reduces the number of openings on the circuit board, greatly reduces the opening area, increases the effective area of ​​the circuit board, is beneficial for circuit layout, increases the electrical clearance and creepage distance of the circuit layout, and improves electrical performance.

[0048] This application also proposes a battery pack, which includes the aforementioned battery circuit breaker unit.

[0049] For example, in the embodiments of this application, the battery pack can be a square battery pack, a cylindrical battery pack, a pouch battery pack, etc., and can be set according to actual needs. The specific type of battery pack is not limited in the embodiments of this application.

[0050] The battery pack described in this application embodiment may include at least the following advantages: In this embodiment, the battery pack includes the aforementioned battery circuit breaker unit, which comprises a cover plate, a circuit board, a relay, an electrical connector, and a support member. The battery circuit breaker unit has a first direction, with the cover plate, circuit board, and relay arranged along this direction. The circuit board is located between the cover plate and the relay, and is connected to both the cover plate and the relay. The circuit board has a through hole extending along the first direction and includes a first surface that faces away from the relay. The electrical connector is connected to the first surface and passes through the through hole, electrically connecting to the relay. The support member is connected to the cover plate and passes through the through hole, connecting to the relay. Thus, the electrical connector enables circuit connection between the circuit board and the relay, while the support member provides stable and reliable support between the relay and the cover plate, preventing excessive pressure on the relay and circuit board. Furthermore, an electrical connector is provided that connects to the first surface of the circuit board and passes through a through hole extending along the first direction, and a support member is provided that connects to the cover plate and also passes through a through hole extending along the first direction on the circuit board. This allows the electrical connector and the support member to simultaneously pass through the through hole on the circuit board along the first direction, meaning that the electrical connector and the support member can share the same through hole. This achieves the merging of the openings of the electrical connector and the support member on the circuit board, reduces the number of openings on the circuit board, greatly reduces the opening area, increases the effective area of ​​the circuit board, is beneficial for circuit layout, increases the electrical clearance and creepage distance of the circuit layout, and improves electrical performance.

[0051] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "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 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.

[0052] Although embodiments of the 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 invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery circuit breaker unit, characterized in that, The battery circuit breaker unit includes: a cover plate (10), a circuit board (20), a relay (30), an electrical connector (23), and a support member (11); The battery circuit breaker unit has a first direction (Z), the cover plate (10), the circuit board (20) and the relay (30) are arranged along the first direction (Z), the circuit board (20) is located between the cover plate (10) and the relay (30), and the circuit board (20) is connected to the cover plate (10) and the relay (30) respectively. The circuit board (20) is provided with a through hole (21) extending along the first direction (Z), and the circuit board (20) includes a first surface (22) disposed away from the relay (30); The electrical connector (23) is connected to the first surface (22), and the electrical connector (23) passes through the through hole (21) and is electrically connected to the relay (30); The support member (11) is connected to the cover plate (10), and the support member (11) passes through the through hole (21). The support member (11) is connected to the relay (30).

2. The battery circuit breaker unit according to claim 1, characterized in that, The support member (11) and the electrical connector (23) are spaced apart within the through hole (21).

3. The battery circuit breaker unit according to claim 1, characterized in that, The support member (11) is pressed against the electrical connector (23).

4. The battery circuit breaker unit according to claim 1, characterized in that, The circuit board (20) includes a central area (28) and an edge area (29) surrounding the central area (28). The number of through holes (21) is multiple, and the multiple through holes (21) are spaced apart in the edge area.

5. The battery circuit breaker unit according to claim 1, characterized in that, The relay (30) includes a central region (32) and an edge region (33) surrounding the central region (32). The central region (32) is provided with wiring. There are multiple support members (11), and the multiple support members (11) are spaced apart in the edge region (33).

6. The battery circuit breaker unit according to claim 5, characterized in that, The plurality of the support members (11) are arranged circumferentially around the central region (32).

7. The battery circuit breaker unit according to claim 1, characterized in that, The electrical connector (23) includes a nickel sheet (24) and a weld post (25) connected to the nickel sheet (24); The nickel sheet (24) is connected to the first surface (22), and the welding post (25) passes through the through hole (21) and is electrically connected to the relay (30).

8. The battery circuit breaker unit according to claim 7, characterized in that, The welded column (25) and the support member (11) are spaced apart within the through hole (21).

9. The battery circuit breaker unit according to claim 1, characterized in that, The support member (11) is an insulating member or a buffer member.

10. The battery circuit breaker unit according to claim 1, characterized in that, The battery circuit breaker unit also includes a housing (31), the circuit board (20), the relay (30), the electrical connector (23) and the support member (11) are all disposed in the housing (31), the housing (31) has an opening, and the cover plate (10) is connected to the opening.

11. A battery pack, characterized in that, The battery pack includes the battery disconnect unit as described in any one of claims 1-10.

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