Battery boxes, battery packs and electrical devices

Abstract

This utility model provides a battery box, a battery pack, and an electrical device. The battery box includes: a side beam with a first opening that extends through the side beam and is connected to the upper surface of the side beam; and a first reinforcing member including a connecting portion, the two ends of which are respectively connected to portions of the side beam located on both sides of the first opening. The first opening has a dimension of A mm along its length, and the first reinforcing member has a length of B mm, where 0.3 ≤ A / B ≤ 0.9. The technical solution provided by this application solves the problem in related technologies where the opening in the side beam affects its structural strength.

Description

Technical Field

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

[0002] In the field of battery technology, battery pack design is crucial for ensuring overall safety and improving energy efficiency. A battery pack typically consists of multiple batteries encapsulated within a battery housing, which needs to provide sufficient physical support and protection.

[0003] In related technologies, the side beams of the battery pack are designed with openings to avoid certain components. However, this design reduces the structural strength of the side beams, affecting the structural stability and durability of the entire battery pack. Utility Model Content

[0004] This utility model provides a battery box, a battery pack, and an electrical device to solve the problem in related technologies where the openings in the side beams affect their structural strength.

[0005] According to one aspect of the present invention, a battery box is provided, the battery box comprising: a side beam having a first opening extending through the side beam and the upper part of the first opening communicating with the upper surface of the side beam; a first reinforcing member including a connecting portion, the two ends of the connecting portion being respectively connected to portions of the side beam located on both sides of the first opening; wherein, in the length direction of the side beam, the size of the first opening is A mm, the length of the first reinforcing member is B mm, and 0.3≤A / B≤0.9.

[0006] According to another aspect of the present invention, a battery pack is provided, the battery pack comprising: a battery; a battery case, the battery being disposed inside the battery case, the battery case being the battery case provided above.

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

[0008] By applying the technical solution of this utility model, the problem of the structural strength of the side beam being affected by the opening in the side beam can be effectively solved in related technologies by setting a first reinforcing member on the side beam. The connecting part of the first reinforcing member is designed so that its two ends are firmly connected to the side beam parts on both sides of the first opening. This design can enhance the structural stability of the side beam in the area of ​​the first opening and prevent the strength reduction caused by the first opening. Specifically, the first reinforcing member forms a support structure spanning the first opening through the connection of its two ends to the side beam, similar to the beam structure of a bridge. This can effectively disperse the stress concentration caused by the first opening and improve the overall rigidity and deformation resistance of the side beam. Furthermore, since the size of the first opening and the length of the first reinforcing member satisfy 0.3≤A / B≤0.9 in the length direction of the side beam, the first opening can be used to meet the avoidance requirements, and the first reinforcing member can be used to achieve a good reinforcement effect. 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:

[0010] Figure 1 A schematic diagram of the battery pack provided in an embodiment of the present invention is shown;

[0011] Figure 2 A schematic diagram of the battery box provided in an embodiment of the present invention is shown;

[0012] Figure 3 It shows Figure 2 A magnified view of a section at point S in the middle;

[0013] Figure 4 A schematic diagram of the structure of the first reinforcing member of the battery box provided in an embodiment of the present invention is shown.

[0014] The above figures include the following reference numerals:

[0015] 10. Edge beam; 11. First opening; 12. Front beam; 13. Rear beam; 14. Side beam;

[0016] 20. First reinforcing member; 21. Connecting part; 211. Connecting piece; 2111. First plate segment; 2112. Second plate segment; 23. Side beam connecting part; 231. Connecting hole; 24. Reinforcing structure; 241. Reinforcing protrusion;

[0017] 30. Structural beams;

[0018] 60. Battery box; 61. Battery compartment; 62. Electrical compartment; 63. Divider beam;

[0019] 70. Conductive busbar;

[0020] A. The dimension of the first opening along the length of the edge beam;

[0021] B. The length of the first reinforcing member along the length of the side beam;

[0022] L1, the length of the first plate segment;

[0023] L2, increase the length of the convex hull;

[0024] L3, the dimension of the second plate segment in the width direction of the first plate segment. Detailed Implementation

[0025] 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.

[0026] like Figures 1 to 4 As shown, this embodiment of the present invention provides a battery box, which includes a side beam 10 and a first reinforcing member 20. The side beam 10 has a first opening 11 that extends through the side beam 10 and is connected to the upper surface of the side beam 10. The first reinforcing member 20 includes a connecting portion 21, the two ends of which are respectively connected to the portions of the side beam 10 located on both sides of the first opening 11. In the length direction of the side beam 10, the size of the first opening 11 is A mm, the length of the first reinforcing member 20 is B mm, and 0.3 ≤ A / B ≤ 0.9.

[0027] By applying the battery box provided in this embodiment, and by setting a first reinforcing member 20 on the side beam 10, the problem of the side beam's structural strength being affected by the first opening 11 in related technologies can be effectively solved. The connecting portion 21 of the first reinforcing member 20 is designed so that its two ends are firmly connected to the side beam 10 portions on both sides of the first opening 11. This design can enhance the structural stability of the side beam 10 in the area of ​​the first opening 11 and prevent the strength reduction caused by the first opening 11. Specifically, the first reinforcing member 20, through the connection of its two ends of the connecting portion 21 to the side beam 10, forms a support structure spanning the first opening 11, similar to the beam structure of a bridge. This can effectively disperse the stress concentration caused by the first opening 11 and improve the overall rigidity and deformation resistance of the side beam 10.

[0028] Furthermore, since the size of the first opening 11 and the length of the first reinforcing member 20 satisfy 0.3≤A / B≤0.9 in the length direction of the side beam 10, the first opening 11 can be used to meet the avoidance requirements, and the first reinforcing member 20 can be used to achieve a good reinforcement effect.

[0029] A / B can be 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or other values ​​between 0.3 and 0.9.

[0030] In this embodiment, the overlap distance between both ends of the first reinforcing member 20 and the surface of the side beam 10 is Cmm, where 2mm ≤ Cmm ≤ 30mm. Setting the overlap distance Cmm within the above range ensures connection strength without taking up too much space or increasing costs excessively.

[0031] Wherein, Cmm can be 2mm, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, or other values ​​between 2mm and 30mm.

[0032] In this embodiment, the thickness of the first reinforcing member 20 is Dmm, where 0.5mm ≤ Dmm ≤ 3mm. Setting the thickness Dmm of the first reinforcing member 20 within the above range ensures connection strength without taking up too much space or increasing costs excessively.

[0033] Wherein, Dmm can be 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, and other values ​​between 0.5mm and 3mm.

[0034] Wherein, 20mm≤Amm≤60mm; and / or, 25mm≤Bmm≤80mm. Setting the size A of the first opening 11 and the length B of the first reinforcing member 20 within the above ranges allows the first opening 11 to meet the avoidance requirements without significantly affecting the strength of the side beam 10, while also achieving a good reinforcement effect with the first reinforcing member 20 without taking up too much space or increasing costs excessively.

[0035] Specifically, Amm can be 20mm, 30mm, 40mm, 50mm, 60mm, and other values ​​between 20mm and 60mm.

[0036] Specifically, Bmm can be 25mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, and other values ​​between 25mm and 80mm.

[0037] like Figure 2As shown, in this embodiment, the battery box includes a battery compartment 61 and an electrical compartment 62. A partition beam 63 is provided between the battery compartment 61 and the electrical compartment 62. A second opening is provided on the partition beam 63, and a conductive busbar 70 is provided in the second opening. The second opening can be used to avoid the conductive busbar 70, thereby improving the space utilization of the device and thus increasing the energy density of the battery pack.

[0038] The battery compartment 61 is used to store batteries, and the electrical compartment 62 is used to store electrical components, such as the BMS (Battery Management System).

[0039] In the longitudinal direction of the partition beam 63, the width of the conductive bar 70 is K1 mm, and the width of the second opening is K2 mm, with 0.5 ≤ K1 / K2 ≤ 0.9. Setting the ratio of the width K1 of the conductive bar 70 to the width K2 of the second opening within the above range can balance structural strength and insulation effect.

[0040] Specifically, if the ratio of the width K1 of the conductive busbar 70 to the width K2 of the second opening is too small, for example, if the width K2 of the second opening is large, the structural strength of the partition beam 63 will be poor. If the ratio of the width K1 of the conductive busbar 70 to the width K2 of the second opening is too large, the conductive busbar 70 will easily rub against the partition beam 63, thereby damaging the insulation layer of the conductive busbar 70 and posing a safety hazard.

[0041] Specifically, K1 / K2 can be 0.5, 0.6, 0.7, 0.8, 0.9, and other values ​​between 0.5 and 0.9.

[0042] Specifically, 8mm ≤ K1mm ≤ 40mm; and / or 10mm ≤ K2mm ≤ 45mm. Setting K1mm and K2mm within the above ranges can also balance structural strength and insulation performance, which will not be elaborated further here.

[0043] In this embodiment, a second reinforcing member is provided at the second opening. The two ends of the second reinforcing member are respectively connected to the portions of the partition beam 63 located on both sides of the second opening. The distance from the upper surface of the conductive busbar 70 to the lower surface of the second reinforcing member is X mm, where 1 mm ≤ X mm ≤ 8 mm. Setting X mm within the above range can also balance structural strength and insulation effect.

[0044] If the distance Xmm is too small, the second reinforcing member will easily rub against the conductive bar 70 during battery pack vibration, thereby damaging the insulation layer of the conductive bar 70. If the distance Xmm is too large, the depth of the second opening will be large, which will result in poor structural strength of the partition beam 63.

[0045] Specifically, Xmm can be 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, and other values ​​between 1mm and 8mm.

[0046] In this embodiment, the first reinforcing member and the second reinforcing member have the same structure.

[0047] In this embodiment, the distance from the bottom wall of the second opening to the lower surface of the partition beam 63 is Y mm, where 20 mm ≤ Y mm ≤ 200 mm. Setting the distance Y mm within the above range can also balance structural strength and insulation effect.

[0048] If the distance Ymm is too small, the structural strength of the partition beam 63 will be poor. If the distance Ymm is too large, the second reinforcing member will easily rub against the conductive busbar 70, thereby damaging the insulation layer of the conductive busbar 70.

[0049] Specifically, Ymm can be 20mm, 50mm, 100mm, 150mm, 200mm, and other values ​​between 20mm and 200mm.

[0050] like Figure 1 and Figure 2 As shown, the side beam 10 includes a front beam 12, a rear beam 13, and a side beam 14, with a first opening 11 provided on either the rear beam 13 or the side beam 14. Providing the first opening 11 on either the rear beam 13 or the side beam 14 facilitates the avoidance of corresponding components and reduces the impact on the structural strength of the rest of the battery box.

[0051] The first opening 11 is located on the rear beam 13, and the distance between the first opening 11 and the side beam 14 is D1mm, where D1mm ≥ 10mm; alternatively, the first opening is located on the side beam 14, and the distance between the first opening 11 and the front beam 12 or the distance between the first opening 11 and the rear beam 13 is D1mm. By controlling the distance D1, the structural layout of the battery box can be optimized, preventing the first opening 11 from being too close to the other beams and affecting their structural strength.

[0052] D1mm can be 10mm, 20mm, 30mm, 40mm, or other values ​​greater than 10mm.

[0053] like Figure 2 As shown, the battery box also includes a structural beam 30, the two ends of which are connected to two opposite beams of the side beam 10. The structural beam 30 reinforces the battery box, increases its structural strength, and secures the battery.

[0054] Specifically, the structural beam 30 and the side beam 10 form a stable frame structure, improving the rigidity and stability of the battery box. Furthermore, the structural beam 30 effectively secures the batteries inside the battery box, preventing them from shifting within the box.

[0055] In the longitudinal direction of the structural beam 30, the first opening 11 at least partially overlaps with the structural beam 30, and the ratio of the overlap distance to the length of the first opening 11 is Z, where 0.3≤Z≤1.

[0056] By ensuring that the first opening 11 at least partially overlaps with the structural beam 30, and controlling the ratio Z of the overlap distance to the length of the first opening 11 to satisfy 0.3≤Z≤1, the structural strength of the battery pack can be enhanced by the structural beam 30, thereby reducing the impact of the strength decrease at the first opening 11 of the side beam 10 on the overall structural strength of the battery pack.

[0057] Specifically, Z can be 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, and other values ​​between 0.3 and 1.

[0058] In this embodiment, the side beam 10 is provided with a plurality of first openings 11, which are arranged at intervals in the extending direction of the side beam 10. The arrangement of the plurality of first openings 11 can meet the avoidance requirements of multiple components (conductive busbars 70), while the interval arrangement ensures the uniformity and stability of the battery box structure.

[0059] The spacing of the first opening 11 is based on a balance between the layout requirements of the components inside the battery box and the structural strength of the battery box, ensuring the structural stability of the battery box and the rationality of the component layout. This structure satisfies the need for avoidance of components inside the battery box while maintaining the structural strength of the battery box.

[0060] The distance between two adjacent first openings 11 is D4mm, where 30mm≤D4mm≤500mm. By controlling the distance D4 between two adjacent first openings 11, the structural layout of the battery box can be optimized, avoiding the first openings 11 being too dense and affecting the structural strength of the battery box.

[0061] Therefore, by adopting the above structure, it is possible to ensure that the structural strength of the battery box at the first opening 11 meets the usage requirements, while optimizing the layout of components.

[0062] The distance D4mm between two adjacent first openings 11 can be 30mm, 100mm, 200mm, 300mm, 400mm, 500mm, or other values ​​between 30mm and 500mm.

[0063] like Figure 4As shown, in this embodiment, the connecting part 21 includes a connecting piece 211. The connecting piece 211 simplifies the connection structure between the first reinforcing member 20 and the side beam 10, and reduces production costs.

[0064] The connecting piece 211 forms a stable connection with the side beam 10, ensuring the secure installation of the first reinforcing member 20 and the structural strength of the battery box. This structure simplifies the installation process of the first reinforcing member 20 and improves the structural strength of the battery box.

[0065] like Figure 4 As shown, the connecting piece 211 includes a first plate segment 2111 and two second plate segments 2112. The two second plate segments 2112 are respectively connected to both ends of the first plate segment 2111. Side beam connecting parts 23 are provided on both ends of the first plate segment 2111 and on the second plate segments 2112. With the above structure, the arrangement of the first plate segment 2111 and the second plate segment 2112 forms a stable connection structure, further improving the connection strength between the first reinforcing member 20 and the side beam 10.

[0066] In this embodiment, the first plate segment 2111 is an elongated structure. The elongated first plate segment 2111 can provide a larger connection area and enhance the connection strength.

[0067] Specifically, the first plate segment 2111 of the elongated structure, based on the structural strength requirements of the connecting part 21 and the structural characteristics of the side beam 10, ensures a stable connection between the first reinforcing member 20 and the side beam 10, thereby improving the structural strength of the battery box.

[0068] In this embodiment, the battery box also includes fasteners, and the side beam connection part 23 is a connection hole 231. The fastener passes through the connection hole 231 and is connected to the side beam 10. Through the cooperation of the fastener and the connection hole 231, a stable connection between the first reinforcing member 20 and the side beam 10 is achieved, simplifying the installation process and improving the structural strength of the battery box.

[0069] The first plate segment 2111 is provided with a reinforcing structure 24. The reinforcing structure 24 can further improve the structural strength of the first plate segment 2111, ensure the stable connection between the first reinforcing member 20 and the side beam 10, and thus further improve the structural strength of the side beam.

[0070] It should be noted that the reinforcing structure 24 can have the following structure:

[0071] 1) Reinforcing convex hull 241: By forming a reinforcing convex hull on the first plate segment 2111, the structural complexity can be increased, thereby improving the local bending and shear resistance. The reinforcing convex hull 241 can be circular, elliptical, rectangular, etc., depending on the requirements for optimizing structural strength.

[0072] 2) Ribs: Similar to reinforcing bulges 241, ribs are reinforcing structures extending along the length or width of the first plate segment 2111. Ribs can be continuous or spaced out, and their height and width can be adjusted as needed to provide additional support and stability.

[0073] 3) Corrugated plate: This structure forms a wave-shaped undulation on the surface of the first plate segment 2111, which can not only increase the thickness of the material, but also reduce the weight through the gaps between the corrugations, while maintaining or enhancing the structural strength.

[0074] 4) Honeycomb structure: By forming a honeycomb-like cavity structure inside or on the surface of the first plate segment 2111, its compressive and bending resistance can be significantly improved without significantly increasing its weight. The honeycomb structure can effectively disperse and resist external pressure, preventing deformation of the first plate segment 2111.

[0075] In this embodiment, the reinforcing structure 24 includes a reinforcing bulge 241.

[0076] like Figure 4 As shown, the length of the first plate segment 2111 is L1mm, the length of the reinforcing convex bulge 241 is L2mm, and 0.3≤L2 / L1≤0.9.

[0077] By controlling the ratio of the length L2 of the reinforcing bulge 241 to the length L1 of the first plate segment 2111, the setting of the reinforcing bulge 241 can be optimized to ensure the structural strength of the first plate segment 2111.

[0078] The setting of L2 / L1 is based on the structural strength requirements of the first plate segment 2111 and the strengthening effect of the reinforcing bulge 241, ensuring the structural stability of the first plate segment 2111 and the installation firmness of the first reinforcing member 20.

[0079] Specifically, L2 / L1 can be 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, and other values ​​between 0.3 and 0.9.

[0080] like Figure 4 As shown, the length of the first plate segment 2111 is L1mm, and the dimension of the second plate segment 2112 in the width direction of the first plate segment 2111 is L3mm, where 0.4≤L3 / L1≤1.5. By controlling the ratio of the dimension L3 of the second plate segment 2112 to the length L1 of the first plate segment 2111, the structural layout of the first reinforcing member 20 can be optimized, ensuring a stable connection between the first reinforcing member 20 and the side beam 10.

[0081] L3 / L1 can be 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, or other values ​​between 0.4 and 1.5.

[0082] In this embodiment, the ratio of the width of the first plate segment 2111 to the width of the side beam 10 is U, where 0.5 ≤ U ≤ 0.9. Setting the ratio U of the width of the first plate segment 2111 to the width of the side beam 10 within the above range can balance the connection strength and assembly interference.

[0083] If the ratio U of the width of the first plate segment 2111 to the width of the side beam 10 is too small, the connection strength will be insufficient. If the ratio U of the width of the first plate segment 2111 to the width of the side beam 10 is too large, the first plate segment 2111 will easily interfere with other components.

[0084] Specifically, the ratio U of the width of the first plate segment 2111 to the width of the side beam 10 can be 0.5, 0.6, 0.7, 0.8, 0.9, or other values ​​between 0.5 and 0.9.

[0085] In this embodiment, the first reinforcing member 20 further includes a wiring harness fixing part, which is disposed on the connecting part 21. The wiring harness fixing part of the first reinforcing member 20 not only contributes to the structural strength enhancement of the side beam 10, but also undertakes the function of fixing the wiring harness, realizing the multi-functional integration of the components. The wiring harness fixing part ensures the stability and rational layout of the wiring harness within the battery pack, avoiding loosening and wear of the wiring harness during use, thereby improving the reliability and safety of the battery pack.

[0086] In other words, the battery box provided in this embodiment enhances the structural strength of the side beam 10 and provides the function of fixing the wiring harness by setting the first reinforcing member 20 in the area of ​​the first opening 11. This achieves the dual function of a single component, simplifies the design and manufacturing of the battery pack, and improves the overall performance and cost-effectiveness.

[0087] The battery box also includes a wire-clamping component, which is mounted on the wire harness fixing part. This wire-clamping component simplifies the wire harness fixing process, securing the wire harness through a snap-fit ​​mechanism, facilitating assembly, and improving the assembly efficiency of the battery box.

[0088] In this embodiment, the wire clamping component includes a clip. The clip simplifies the wire harness securing process and reduces production costs.

[0089] Specifically, the engagement between the clip and the wiring harness fixing part is based on the wiring harness fixing requirements and the structural characteristics of the battery box, ensuring the orderly arrangement and stability of the wiring harness, simplifying the wiring harness fixing process, and improving the assembly efficiency and safety of the battery box.

[0090] The wire harness fixing part includes mounting holes, mounting slots, or mounting posts. The structure of the wire harness fixing part provides various methods for fixing wire clips and has the advantage of simple structure.

[0091] In this embodiment, the first reinforcing member 20 is a one-piece molded structure. The one-piece molded first reinforcing member 20 can provide higher structural strength and simplify the production process.

[0092] like Figure 1 As shown, another embodiment of this utility model provides a battery pack, which includes a battery and a battery case 60. The battery is disposed inside the battery case 60, which is the battery case provided above. Therefore, this battery pack, by providing a first reinforcing member 20 on the side beam 10, can effectively solve the problem in the related art where the side beam's structural strength is affected by the opening, which will not be elaborated further here.

[0093] In this embodiment, the battery pack includes a conductive busbar 70, which is electrically connected to the battery. The conductive busbar 70 is positioned corresponding to the first opening 11 of the battery box 60. The conductive busbar 70 satisfies the electrical connection requirements of the batteries within the battery pack, while its positioning corresponding to the first opening 11 avoids interference between the conductive busbar 70 and the battery box 60.

[0094] In this embodiment, the conductive bus 70 includes a copper bus.

[0095] 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 can also solve the problem in related technologies where the openings in the side beams affect their structural strength, which will not be elaborated upon further here.

[0096] Electrical devices include, but are not limited to, vehicles.

[0097] The apparatus provided by the embodiments has the following beneficial effects:

[0098] (1) By setting a first reinforcing member 20 in the first opening 11 area of ​​the side beam 10, especially by firmly connecting the connecting part 21 to both sides of the side beam 10, the structural strength and rigidity of the side beam 10 in the first opening 11 area are significantly enhanced, and the problem of reduced structural strength of the side beam caused by the first opening 11 in the related technology is solved.

[0099] (2) The wire harness fixing part on the first reinforcing member 20 can effectively fix the wire harness inside the battery pack, maintain the stability and rationality of the wire harness layout, prevent the wire harness from loosening during use, and improve the reliability and safety of the battery pack.

[0100] (3) The first reinforcing member 20 not only enhances the structural strength, but also integrates the wire harness fixing function, reduces the need for additional wire harness fixing members, simplifies the design and manufacturing process of the battery box, reduces costs, and improves production efficiency.

[0101] 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 (casing, brackets, etc.), and protective components, etc., which are combined into a battery box and sealed with a cover to form a complete functional unit that can directly output electrical energy.

[0102] The battery box includes: a lower box body, including a bottom plate and a side plate connected to and surrounding the bottom plate; and an upper box body connected to the side plate, the upper box body having a cover plate opposite to the bottom plate, the upper box body and the lower box body together forming a receiving chamber.

[0103] 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.

[0104] The battery box features a partition beam fixedly connected to the side panel of the box, dividing the internal space into an electrical compartment and a battery compartment. The partition beam can be made of metal, such as aluminum, or 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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 box, characterized in that, The battery box includes: Side beam (10), the side beam (10) has a first opening (11), the first opening (11) is provided through the side beam (10), and the top of the first opening (11) is connected to the upper surface of the side beam (10); The first reinforcing member (20) includes a connecting part (21), the two ends of which are respectively connected to the portions of the side beam (10) located on both sides of the first opening (11); In the length direction of the side beam (10), the size of the first opening (11) is A mm, the length of the first reinforcing member (20) is B mm, and 0.3≤A / B≤0.

9.

2. The battery box according to claim 1, characterized in that, The overlap distance between the two ends of the first reinforcing member (20) and the surface of the side beam (10) is Cmm, where 2mm≤Cmm≤30mm.

3. The battery box according to claim 1, characterized in that, The thickness of the first reinforcing member (20) is Dmm, where 0.5mm≤Dmm≤3mm.

4. The battery box according to claim 1, characterized in that, 20mm≤Amm≤60mm; and / or, 25mm≤Bmm≤80mm.

5. The battery box according to claim 1, characterized in that, The battery box includes a battery compartment (61) and an electrical compartment (62). A partition beam (63) is provided between the battery compartment (61) and the electrical compartment (62). A second opening is provided on the partition beam (63), and a conductive busbar (70) is provided in the second opening.

6. The battery box according to claim 5, characterized in that, In the length direction of the partition beam (63), the width of the conductive bar (70) is K1mm, the width of the second opening is K2mm, and 0.5≤K1 / K2≤0.

9.

7. The battery box according to claim 6, characterized in that, 8mm≤K1mm≤40mm; and / or, 10mm≤K2mm≤45mm.

8. The battery box according to claim 5, characterized in that, A second reinforcing member is provided at the second opening. The two ends of the second reinforcing member are respectively connected to the portions of the partition beam (63) located on both sides of the second opening. The distance from the upper surface of the conductive busbar (70) to the lower surface of the second reinforcing member is X mm, where 1 mm ≤ X mm ≤ 8 mm.

9. The battery box according to claim 5, characterized in that, The distance from the bottom wall of the second opening to the lower surface of the partition beam (63) is Y mm, 20 mm ≤ Y mm ≤ 200 mm.

10. The battery box according to claim 1, characterized in that, The side beam (10) includes a front beam (12), a rear beam (13) and a side beam (14), and the first opening (11) is provided on the rear beam (13) or the side beam (14).

11. The battery box according to claim 10, characterized in that, The first opening (11) is provided on the rear beam (13), and the distance between the first opening (11) and the side beam (14) is D1mm, where D1mm ≥ 10mm; or, The first opening (11) is provided on the side beam (14), and the distance between the first opening (11) and the front beam (12) or the rear beam (13) is D1mm, where D1mm≥10mm.

12. The battery box according to claim 1, characterized in that, The battery box also includes a structural beam (30), the two ends of which are connected to two opposite beams of the side beam (10).

13. The battery box according to claim 12, characterized in that, Along the length of the structural beam (30), the first opening (11) at least partially overlaps with the structural beam (30), and the overlap distance is Z, where 0.3 ≤ Z ≤ 1.

14. The battery box according to claim 1, characterized in that, The side beam (10) is provided with a plurality of first openings (11), and the plurality of first openings (11) are arranged at intervals in the extension direction of the side beam (10).

15. The battery box according to claim 14, characterized in that, The distance between two adjacent first openings (11) is D4mm, 30mm≤D4mm≤500mm.

16. The battery box according to any one of claims 1 to 15, characterized in that, The connecting part (21) includes a connecting piece (211).

17. The battery box according to claim 16, characterized in that, The connecting piece (211) includes a first plate segment (2111) and two second plate segments (2112). The two second plate segments (2112) are respectively connected to both ends of the first plate segment (2111). Side beam connecting parts (23) are provided on both ends of the first plate segment (2111) and on the second plate segments (2112).

18. The battery box according to claim 17, characterized in that, The first plate segment (2111) is a long strip structure.

19. The battery box according to claim 17, characterized in that, The battery box also includes fasteners, and the side beam connection part (23) is a connection hole (231). The fastener passes through the connection hole (231) and is connected to the side beam (10).

20. The battery box according to claim 17, characterized in that, The first plate segment (2111) is provided with a reinforcing structure (24).

21. The battery box according to claim 20, characterized in that, The reinforcing structure (24) includes a reinforcing convex hull (241).

22. The battery box according to claim 21, characterized in that, The length of the first plate segment (2111) is L1mm, the length of the reinforcing convex bulge (241) is L2mm, and 0.3≤L2 / L1≤0.

9.

23. The battery box according to claim 17, characterized in that, The length of the first plate segment (2111) is L1mm, and the size of the second plate segment (2112) is L3mm in the width direction of the first plate segment (2111), with 0.4≤L3 / L1≤1.

5.

24. The battery box according to claim 18, characterized in that, The ratio of the width of the first plate segment (2111) to the width of the side beam (10) is U, where 0.5 ≤ U ≤ 0.

9.

25. A battery pack, characterized in that, The battery pack includes: Battery; A battery case (60), wherein the battery is disposed within the battery case (60), and the battery case (60) is the battery case according to any one of claims 1 to 24.

26. The battery pack according to claim 25, characterized in that, The battery pack includes a conductive bus (70) which is electrically connected to the battery and is provided corresponding to the first opening (11) of the battery box (60).

27. An electrical appliance, characterized in that, The electrical device includes a battery pack, which is the battery pack described in claim 25 or 26.

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