Battery pack and electric device

Abstract

The utility model relates to battery technology field discloses a kind of battery pack and electric device, the battery pack includes: box and lid;Battery management module is set in box, and battery management module has wiring harness interface;Shielding plate is between lid and battery management module, and the projection of shielding plate on battery management module covers wiring harness interface. Through the technical scheme provided in the application, the problem that battery pack in related art can produce condensate in use process, and there is water inlet risk at the wiring harness interface of battery management module.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery pack and an electrical device. Background Technology

[0002] Battery packs are widely used in various electrical devices, especially electric vehicles and energy storage systems. A battery pack typically consists of a housing containing the battery pack and a Battery Management System (BMS). The BMS monitors the charging and discharging status of the battery pack to ensure that it operates within safe limits.

[0003] In related technologies, in order to enable the battery management module to connect with other components, the battery management module is provided with a wiring harness interface for connecting the wiring harness.

[0004] During battery pack operation, temperature variations within the internal battery pack and the resulting temperature difference between the inside and outside of the enclosure can cause condensation to form inside the battery pack. This condensation not only affects the internal environment of the battery pack but, more importantly, it can pose a potential threat to the wiring harness interfaces of the battery management module. If condensation flows into the wiring harness interfaces, it can lead to electrical problems such as short circuits and corrosion. Utility Model Content

[0005] This utility model provides a battery pack and an electrical device to solve the problems in related technologies where condensation may occur during the use of the battery pack and there is a risk of water ingress at the wiring harness interface of the battery management module.

[0006] According to one aspect of the present invention, a battery pack is provided, comprising: a housing and a cover; a battery management module disposed within the housing, the battery management module having a wiring harness interface; and a shield located between the cover and the battery management module, the projection of the shield onto the battery management module covering the wiring harness interface.

[0007] According to another aspect of the present invention, an electrical device is provided, which includes a battery pack, the battery pack being the one provided above.

[0008] By applying the technical solution of this utility model, the problem of water ingress at the wiring harness interface of the battery management module, which may occur during battery pack use, can be solved. The projection of the shield on the battery management module covers the wiring harness interface, meaning that the shield can directly block condensate falling from above, preventing it from directly contacting the wiring harness interface. This design is equivalent to providing a physical barrier for the wiring harness interface, significantly reducing the possibility of direct moisture intrusion. Attached Figure Description

[0009] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings: Figure 1 A schematic diagram of the battery pack provided in an embodiment of the present invention is shown; Figure 2 This diagram shows the structure of the battery pack at the BMS according to an embodiment of the present invention; Figure 3 A schematic diagram of the structure of the battery pack at the BMS (not shown) provided in an embodiment of the present invention is shown; Figure 4 This diagram shows another view of the battery pack provided in this embodiment of the invention at the BMS.

[0010] The above figures include the following reference numerals: 10. Enclosure; 11. Divider beam; 12. Battery compartment; 13. Electrical compartment; 14. Cover; 20. Battery management module; 21. Wiring harness interface; 30. Shelter; L1, The shield protrudes beyond the length of the wiring harness interface along the length of the battery management module; L2, the shield protrudes beyond the dimensions of the wiring harness interface in the width direction of the battery management module. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0012] like Figures 1 to 4 As shown, this embodiment of the present invention provides a battery pack, which includes a housing 10, a cover 14, a battery management module 20, and a shield 30. The housing 10 and the cover 14 together form a cavity for accommodating the battery pack. The battery management module 20 is disposed inside the housing 10 and has a wiring harness interface 21. The shield 30 is located between the cover 14 and the battery management module 20, and the projection of the shield 30 on the battery management module 20 covers the wiring harness interface 21.

[0013] The battery pack provided in this embodiment solves the problem in related technologies where condensation may occur during battery pack use, posing a risk of water ingress at the wiring harness interface of the battery management module. The projection of the shield 30 onto the battery management module 20 covers the wiring harness interface 21, meaning that the shield 30 can directly block condensation falling from above, preventing it from directly contacting the wiring harness interface 21. This design effectively provides a physical barrier for the wiring harness interface 21, significantly reducing the possibility of direct moisture intrusion.

[0014] Furthermore, the baffle 30 guides condensate to other areas of the housing 10, preventing moisture from accumulating around the battery management module 20. Especially when the baffle 30 is also designed with a water-guiding structure, it can more effectively control the flow of condensate, directing it away from the battery management module 20, thereby further reducing the risk of moisture damage to the wiring harness interface 21.

[0015] In this embodiment, the opening of the wire harness interface 21 is a side opening. Using this structure, compared to an opening facing upwards, the side opening design can, to some extent, prevent condensate from entering the wire harness interface 21.

[0016] It should be noted that "side opening" refers to the fact that the opening direction of the wiring harness interface 21 is set at an angle to the side of the battery management module 20. In this embodiment, the opening direction of the wiring harness interface 21 is perpendicular to the side of the battery management module 20.

[0017] In this embodiment, the upper surface of the baffle 30 is spaced apart from the lower surface of the lid 14 to facilitate the baffle 30 in blocking condensate. If there is no gap between the baffle 30 and the lid 14, the condensate cannot drip onto the baffle 30, and the baffle 30 cannot achieve the intended blocking effect.

[0018] The distance between the upper surface of the shield 30 and the lower surface of the cover 14 is D mm, where 5 mm ≤ D mm ≤ 30 mm. If the distance D is too small, the shield 30 is easily affected by the temperature of the cover 14, resulting in condensation on the lower surface of the shield 30. If the distance D is too large, the vertical space utilization of the battery pack is low. By setting the distance D mm between the upper surface of the shield 30 and the cover 14 within the above-mentioned range, a balance can be achieved between the shielding effect of the shield 30 and the vertical space utilization of the battery pack.

[0019] Specifically, the distance Dmm between the upper surface of the baffle 30 and the lower surface of the box cover 14 can be 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, or other values ​​between 5mm and 30mm.

[0020] In some embodiments, a support member is provided between the baffle plate 30 and the box cover 14. The upper end of the support member contacts the lower surface of the box cover 14, and the lower end of the support member contacts the upper surface of the baffle plate 30. By providing the support member, the box cover 14 can be supported.

[0021] Specifically, the support components include foam, which has good cushioning and fireproofing effects.

[0022] In this embodiment, the shield 30 includes a non-metallic plate. The choice of a non-metallic plate avoids the conductivity problems that metal materials might cause due to condensation, effectively preventing circuit failures caused by moisture and improving the stability and safety of the battery pack. At the same time, non-metallic materials generally have good insulation and corrosion resistance.

[0023] In this embodiment, the shield 30 includes a PC board. The PC board, or polycarbonate board, has excellent weather resistance and mechanical strength, making it suitable for the internal environment of the battery pack.

[0024] In other embodiments, other types of non-metallic sheets, such as polyester sheets or polypropylene sheets, can be selected to suit different application scenarios and environmental conditions.

[0025] In this embodiment, the shielding plate 30 is fixedly connected to the battery management module 20. The relative positions of the shielding plate 30 and the battery management module 20 are fixed, making relative movement difficult, and the shielding effect of the shielding plate 30 is good.

[0026] Specifically, the fixed connection ensures the stability of the shield 30 within the battery pack, preventing positional displacement due to vibration or impact. The fixed connection utilizes mechanical force or chemical bonding to firmly secure the shield 30 above the battery management module 20, forming a stable protective structure that ensures the shield 30 always covers the wiring harness interface 21, thus improving the reliability of the waterproofing effect.

[0027] In this embodiment, the shield 30 is bonded to the upper surface of the battery management module 20. Bonding is a simple and quick fixing method, suitable for automated production lines.

[0028] The adhesive forms a sealing layer between the shield 30 and the battery management module 20, further enhancing the waterproof effect. Therefore, this structure not only simplifies the assembly process but also improves the overall sealing performance of the protective structure.

[0029] Specifically, bonding can be achieved using double-sided tape or structural adhesive, and the structural adhesive material can be epoxy resin, silicone rubber, or polyurethane.

[0030] In other embodiments, the shield 30 and the battery management module 20 can also be fixedly connected by clips, screws or other fasteners to adapt to different assembly processes and maintenance needs.

[0031] In other embodiments, the shield 30 can be fixedly connected to the housing 10, and the housing 10 provides assembly space for the shield 30, which has the advantage of being easy to assemble.

[0032] Specifically, by directly fixing the shield 30 to the housing 10, the structural stability of the housing 10 can be utilized to enhance the positioning effect of the shield 30. As the frame of the entire battery pack, the housing 10 has sufficient structural strength to support the shield 30 and maintain its position, ensuring the long-term stability of the shield 30 within the battery pack and reliably preventing moisture intrusion even in harsh environments. The shield 30 can be fixedly connected to the housing 10 through welding, riveting, or the use of fasteners to adapt to different manufacturing processes and operating environments.

[0033] like Figure 3 and Figure 4 As shown, the wiring harness interface 21 is located on the long side of the battery management module 20, and the shielding plate 30 protrudes from the side of the battery management module 20. With the above structure, the shielding plate 30 has a large shielding area and a good shielding effect.

[0034] Specifically, the protruding portion of the shield 30 forms an additional waterproof barrier, so that even if condensation flows along the edge of the shield 30, it cannot reach the wiring harness interface 21, greatly reducing the risk of the wiring harness interface 21 getting wet and improving the waterproof performance of the battery pack.

[0035] like Figure 4 As shown, in some embodiments, the shield 30 protrudes from both ends of the wiring harness interface 21 along the length of the battery management module 20. The protrusion dimension of the shield 30 from the wiring harness interface 21 along the length of the battery management module 20 is L1mm, where 10mm ≤ L1mm ≤ 60mm. The protrusion dimension of the shield 30 from the wiring harness interface 21 along the width of the battery management module 20 is L2mm, where 10mm ≤ L2mm ≤ 50mm. By precisely controlling the protrusion dimension of the shield 30, the internal space layout of the battery pack can be optimized while ensuring the protective effect.

[0036] It should be noted that, for ease of understanding, in Figure 4 The diagram schematically shows the harness interface 21, which is actually located below the shield 30.

[0037] The L1 setting takes into account the flow characteristics of condensate and the assembly tolerance of the shield 30, ensuring sufficient protection distance without occupying too much space. This balances waterproofing requirements with battery pack size, improving overall product performance and market competitiveness. Similarly, the L2 setting considers the flow characteristics of condensate and the spatial relationship between the shield 30 and the wiring harness interface 21. The protruding design in the width direction further expands the coverage of the shield 30, enhancing side protection of the wiring harness interface 21. This comprehensively prevents condensate from intruding into the wiring harness interface 21 from the side, improving the battery pack's waterproofing capability and reliability.

[0038] Specifically, L1mm can be 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, or other values ​​between 10mm and 60mm. L2mm can be 10mm, 20mm, 30mm, 40mm, 50mm, or other values ​​between 10mm and 50mm.

[0039] In some embodiments, the baffle 30 is provided with a water-guiding structure. The water-guiding structure guides the condensate water, allowing it to flow along a preset path, thereby improving the waterproofing effect.

[0040] The water guiding structure includes a water guiding channel. This channel forms a water flow path, effectively collecting and guiding condensate. Utilizing surface tension, the channel directs the condensate along a pre-defined path, preventing damage from random dripping. This significantly improves the waterproofing of the battery pack's interior, reducing maintenance costs and failure rates.

[0041] The water-guiding structure extends along the width of the battery management module 20. This water-guiding structure, extending along the width, can collect condensate flowing in from the side of the battery management module 20, preventing it from directly contacting the wiring harness interface 21. This significantly reduces the risk of moisture damage to the wiring harness interface 21 and improves the waterproof performance and overall reliability of the battery pack.

[0042] The housing 10 includes a partition beam 11 that divides it into a battery compartment 12 and an electrical compartment 13. The battery management module 20 is located within the electrical compartment 13. The partition beam 11 has a water inlet, which corresponds to the outlet of the water guiding structure. The partition beam 11 not only optimizes the internal space layout of the battery pack but also provides a channel for the discharge of condensate. The water inlet on the partition beam 11 connects to the outlet of the water guiding structure, forming a directional discharge path for the condensate.

[0043] In some embodiments, the baffle 30 is provided with a water storage structure, with the inlet of the water storage structure corresponding to the outlet of the water guiding structure. The design of the water storage structure can temporarily store condensate, preventing the impact caused by its large accumulation in a short period of time. The water storage structure utilizes the volume effect to absorb and store the condensate guided by the water guiding structure, allowing it to evaporate naturally or be discharged through other means, thereby further enhancing the waterproof capability of the battery pack.

[0044] The water storage structure can be a water storage cavity or a water storage component made of absorbent material.

[0045] In some embodiments, the bottom surface of the water guide channel is lower than the upper surface of the baffle plate 30. There may be multiple water guide channels, and the multiple water guide channels converge to the water guide channel outlet. The water guide channel outlet is connected to the water inlet of the partition beam or the water storage structure.

[0046] In this embodiment, the shield 30 is parallel to the upper surface of the battery management module 20. This parallel arrangement simplifies the installation process of the shield 30 while ensuring a tight fit between it and the battery management module 20.

[0047] Specifically, the parallel relationship between the shield 30 and the upper surface of the battery management module 20 ensures that the shield 30 can uniformly cover the wiring harness interface 21, improving the uniformity and reliability of the protection effect. Furthermore, the above technical solution can simplify the manufacturing process, reduce production costs, and ensure the waterproof performance of the battery pack.

[0048] In some embodiments, the baffle 30 is gradually tilted downwards in the direction away from the battery management module 20. The tilted arrangement can utilize gravity to accelerate the drainage of condensate and reduce its residence time on the baffle 30, which can significantly improve the waterproof efficiency of the battery pack, especially under conditions of rapid charging and discharging or large temperature changes, and can effectively prevent the accumulation of condensate.

[0049] In this embodiment, the battery management module 20 has multiple wiring harness interfaces 21, and the projection of the shield 30 on the battery management module 20 covers all wiring harness interfaces 21. This comprehensive coverage design ensures that the waterproof requirements of all wiring harness interfaces 21 are met, improving the overall protection capability of the battery pack.

[0050] The size and shape of the shield 30 are optimized according to the distribution of all wiring harness interfaces 21 on the battery management module 20, forming an effective protective barrier that can significantly reduce the risk of moisture intrusion into the battery pack and improve the reliability and durability of the product in complex environments.

[0051] In this embodiment, both the upper and lower surfaces of the shield 30 are planar. The planar design simplifies the manufacturing process of the shield 30 and also facilitates its fixed connection with the battery management module 20 or the housing 10.

[0052] Furthermore, the upper surface of the shield 30 can effectively block the direct dripping of condensate, while the lower surface facilitates the sealing connection between the shield 30 and the battery management module 20 or the housing 10, forming a complete waterproof barrier. This not only improves the waterproof performance of the shield 30, but also reduces production costs and maintenance difficulty.

[0053] In other embodiments, the upper and lower surfaces of the shield 30 may also be designed as corrugated, convex or concave or other shapes to enhance its waterproofing effect or to adapt to special assembly requirements.

[0054] Another embodiment of this utility model provides an electrical device, which includes a battery pack, specifically the battery pack described above. Therefore, this electrical device also solves the problems in related technologies where condensation may occur during battery pack use, and where there is a risk of water ingress at the wiring harness interface of the battery management module; these issues will not be elaborated upon further here.

[0055] Electrical devices include, but are not limited to, vehicles.

[0056] The apparatus provided by the embodiments has the following beneficial effects: (1) The design of the shield 30 can effectively prevent condensation from dripping directly onto the wiring harness interface 21 of the battery management module 20, greatly reducing the risk of short circuit caused by moisture and improving the electrical safety and reliability of the battery pack.

[0057] (2) The fixed connection design between the shield 30 and the battery management module 20 or the box 10 makes the assembly process simpler and faster, without the need for additional complex sealing processes, while ensuring the stability of the shield and its long-lasting waterproof effect.

[0058] (3) The shield 30 is made of non-metallic material, especially PC board used in the embodiment. It not only has good insulation performance, but is also lightweight and strong. It can enhance the stability of the internal structure of the battery pack without affecting the overall weight, and adapt to vibration and impact conditions in application scenarios such as electric vehicles.

[0059] (4) By setting a water guiding structure on the baffle plate 30, the flow of condensate can be actively guided away from sensitive electronic components, avoiding arbitrary diffusion of moisture inside the battery pack, optimizing the humidity control inside the battery pack, and extending the service life of the battery pack.

[0060] The battery pack in this application includes a battery pack, a battery management system (BMS), a thermal management system, an electrical connection system (high-voltage / low-voltage connectors, wiring harnesses, etc.), structural components (shell, brackets, etc.), and protective components, etc., which are combined into a battery box and sealed with a cover (box cover) to form a complete functional unit that can directly output electrical energy.

[0061] The battery box includes: a box body, including a bottom plate and a side plate connected to and surrounding the bottom plate; an upper box body connected to the side plate, the upper box body having a cover plate disposed opposite to the bottom plate, the upper box body and the lower box body together enclosing a receiving chamber.

[0062] The cold plate is used to regulate the temperature of the battery and electrical components. The cold plate has internal heat exchange channels for the flow of heat exchange media. These media can be gases (air), liquids (such as water, alcohols, refrigerants, oils, etc.), or solids (such as thermally conductive adhesives, thermally conductive solder paste, etc.). The heat exchange channels have inlets and outlets for the heat exchange media. The media enters the channel through the inlet, exchanges heat with the battery cells and electrical components, and then exits through the outlet, thus achieving heat exchange between the battery cells and electrical components.

[0063] The enclosure contains a partition beam, which is fixedly connected to the side panels of the enclosure. The partition beam divides the internal space of the enclosure into an electrical compartment and a battery compartment. The partition beam can be made of metal, such as aluminum, or it can be integrally molded using rubber injection molding, plastic injection molding, or molding-in-place molding. For plastic injection molding, the plastic used can be polyethylene, polypropylene, ABS, PA, polystyrene, etc. The partition beam can be formed by die casting or other methods such as extrusion molding, and then welded to the original partition beam.

[0064] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0065] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as exemplary only and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0066] In the description of this utility model, it should be understood that "multiple" means two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not 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 limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0067] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0068] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model.

[0069] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery pack, characterized in that, The battery pack includes: Box body (10) and box lid (14); A battery management module (20) is disposed inside the housing (10), and the battery management module (20) has a wiring harness interface (21). A shield (30) is located between the box cover (14) and the battery management module (20), and the projection of the shield (30) on the battery management module (20) covers the wiring harness interface (21).

2. The battery pack according to claim 1, characterized in that, The opening of the harness interface (21) is a side opening.

3. The battery pack according to claim 1, characterized in that, The upper surface of the shield (30) is spaced apart from the lower surface of the box cover (14).

4. The battery pack according to claim 3, characterized in that, The distance between the upper surface of the shield (30) and the lower surface of the box cover (14) is Dmm, where 5mm≤Dmm≤30mm.

5. The battery pack according to claim 1, characterized in that, A support member is provided between the shield (30) and the box cover (14). The upper end of the support member contacts the lower surface of the box cover (14), and the lower end of the support member contacts the upper surface of the shield (30).

6. The battery pack according to claim 5, characterized in that, The support component includes foam.

7. The battery pack according to claim 1, characterized in that, The shield (30) includes a non-metallic plate.

8. The battery pack according to claim 7, characterized in that, The shield (30) includes a PC board.

9. The battery pack according to claim 1, characterized in that, The shield (30) is fixedly connected to the battery management module (20).

10. The battery pack according to claim 9, characterized in that, The shield (30) is bonded to the upper surface of the battery management module (20).

11. The battery pack according to claim 1, characterized in that, The shield (30) is fixedly connected to the box (10).

12. The battery pack according to any one of claims 1 to 11, characterized in that, The wiring harness interface (21) is located on the long side of the battery management module (20), and the shield (30) protrudes from the side of the battery management module (20).

13. The battery pack according to claim 12, characterized in that, The shield (30) protrudes from the wire harness interface (21) in the length direction of the battery management module (20), and the size of the shield (30) protruding from the wire harness interface (21) in the length direction of the battery management module (20) is L1mm, 10mm≤L1mm≤60mm.

14. The battery pack according to claim 12, characterized in that, The shield (30) protrudes from the wire harness interface (21) in the width direction of the battery management module (20) by a dimension of L2mm, where 10mm≤L2mm≤50mm.

15. The battery pack according to any one of claims 1 to 11, characterized in that, The baffle plate (30) is provided with a water guiding structure, which includes a water guiding groove.

16. The battery pack according to claim 15, characterized in that, The water-guiding structure extends along the width direction of the battery management module (20).

17. The battery pack according to claim 15, characterized in that, The housing (10) is provided with a partition beam (11), which divides the housing (10) into a battery compartment (12) and an electrical compartment (13). The battery management module (20) is located in the electrical compartment (13). The partition beam (11) has a water inlet, which is provided corresponding to the outlet of the water guiding structure.

18. The battery pack according to claim 15, characterized in that, The shield (30) is provided with a water storage structure, and the inlet of the water storage structure is provided corresponding to the outlet of the water guiding structure.

19. The battery pack according to any one of claims 1 to 11, characterized in that, The shield (30) is gradually tilted downward in a direction away from the battery management module (20).

20. The battery pack according to any one of claims 1 to 11, characterized in that, The battery management module (20) has multiple wiring harness interfaces (21), and the projection of the shield (30) on the battery management module (20) covers all the wiring harness interfaces (21).

21. The battery pack according to any one of claims 1 to 11, characterized in that, The upper and lower surfaces of the shield (30) are both flat.

22. An electrical appliance, characterized in that, The electrical device includes a battery pack, which is the battery pack according to any one of claims 1 to 21.

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