Box assembly for battery module and battery pack

Abstract

The utility model discloses a box body assembly for a battery module and a battery pack. The box body assembly comprises a first assembly part and a second assembly part which extend in a first direction, the first assembly part and the second assembly part are oppositely arranged, and the first assembly part and the second assembly part are assembled and spliced to define a containing cavity suitable for containing the battery pack between the first assembly part and the second assembly part. According to the box body assembly disclosed by the utility model, the box body assembly is split into the first assembly part and the second assembly part, so that the flexible and efficient assembly process is realized, the operation space is increased, the production cost is reduced, and the safety and the stability of the battery module are improved.

Description

Technical Field

[0001] The utility model relates to the field of batteries, and particularly to a box body assembly and a battery pack for a battery module. Background Art

[0002] A battery module is usually composed of multiple battery cells and is encapsulated and protected by a specific box body, so that the battery module can work stably and efficiently in a complex use environment.

[0003] The box body of the battery module is mostly produced by using an integral profile extrusion technology, and materials such as aluminum alloy are extruded into a box body with a specific shape and size through a mold.

[0004] In the related art, due to the limitations of its size and shape, the production efficiency of the box body is low, the production cost is high, and the assembly efficiency of the battery module is also low. Content of the Utility Model

[0005] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a box body assembly for a battery module. According to the box body assembly of the utility model, by splitting the box body assembly into a first assembly part and a second assembly part, a flexible and efficient assembly process is realized, the operation space is increased, the production cost is reduced, and the safety and stability of the battery module are improved.

[0006] The utility model also provides a battery pack with the above box body assembly.

[0007] The box body assembly according to the utility model is used for a battery module, and the box body assembly includes a first assembly part and a second assembly part extending in a first direction; the first assembly part and the second assembly part are arranged opposite to each other, and the first assembly part and the second assembly part are assembled and spliced to define a receiving cavity suitable for receiving a battery pack between them.

[0008] According to the box body assembly of the utility model, the first assembly part and the second assembly part extend in the first direction, indicating that the extension directions of the first assembly part and the second assembly part are the same, but they are arranged opposite to each other in a direction different from the first direction, so that the first assembly part and the second assembly part can be assembled and spliced to form a stable framework. When the first assembly part and the second assembly part are assembled and spliced, a peripherally closed receiving cavity will be formed between the first assembly part and the second assembly part. The size and shape of the receiving cavity are designed according to the size and shape of the battery pack to be received, so that the battery pack can be stably and safely placed therein. By splitting the box body assembly into a first assembly part and a second assembly part, the size and weight of a single component can be reduced, thereby reducing the size of the mold and the tonnage of the production equipment, which helps to reduce the production cost and improve the production efficiency.

[0009] In addition, when assembling the battery module, the battery pack can be pre-assembled with any one of the first assembly part and the second assembly part first, and then the other of the first assembly part and the second assembly part can be assembled and spliced with the pre-assembled component. The step-by-step assembly method makes the assembly process of the battery module more flexible and efficient, can increase the operation space, relieve the problem of difficult entry into the box, and helps to speed up the assembly efficiency.

[0010] According to some embodiments of the present invention, the first assembly part forms a first splicing edge, the second assembly part forms a second splicing edge, and the second splicing edge is spliced in cooperation with the first splicing edge; wherein, at least one of the first splicing edge and the second splicing edge forms a protruding convex structure, and at least the other of the first splicing edge and the second splicing edge forms a concave recess structure that matches the convex structure.

[0011] According to some embodiments of the present invention, the first assembly part has a first bottom plate part, and the second assembly part has a second bottom plate part; wherein, the first bottom plate part and the second bottom plate part are spaced apart from each other and oppositely arranged in the second direction, and at least one of the first bottom plate part and the second bottom plate part forms a docking plate part extending towards each other, and a receiving cavity is defined between the first bottom plate part, the second bottom plate part and the docking plate part.

[0012] According to some embodiments of the present invention, the docking plate part extends at an angle in the second direction from the edge of the first bottom plate part and / or the second bottom plate part.

[0013] According to some embodiments of the present invention, the docking plate part is divided into a first docking plate part and a second docking plate part. The first docking plate part extends from the two side edges of the first bottom plate part, and the second docking plate part extends from the two side edges of the second bottom plate part. The first docking plate part and the second docking plate part extend towards each other and are docked with each other. The edge of the first docking plate part forms the first splicing edge, and the edge of the second docking plate part forms the second splicing edge.

[0014] According to some embodiments of the present invention, the receiving cavity is provided with an open mouth in the first direction, and the box body assembly further includes: a cover body, the cover body is arranged at the end of the receiving cavity and connected to the first assembly part and / or the second assembly part to close the corresponding open mouth of the receiving cavity.

[0015] According to some embodiments of the present invention, the inner surface of at least one end of the first assembly part and / or the second assembly part in the first direction forms a stop plate extending towards the inside of the receiving cavity, and the stop plate is adapted to stop and limit the end plate of the battery pack.

[0016] In some embodiments of the present utility model, a plurality of reinforcing ribs extending in a first direction are formed on the outer surface of the first assembly member and / or the second assembly member, and the plurality of reinforcing ribs are parallel to each other and arranged at intervals.

[0017] In some embodiments of the present utility model, both the first assembly member and the second assembly member are extruded profiles made of metal.

[0018] The battery pack according to the present invention will be briefly described below.

[0019] The battery pack according to the present invention includes the box body assembly described in any one of the above embodiments, and the first direction is the height direction of the battery pack. Since the battery pack according to the present invention includes the box body assembly described in any one of the above embodiments, the battery pack according to the present invention has a flexible and efficient assembly process, increases the operation space, reduces the production cost, and improves the safety and stability at the same time.

[0020] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Brief Description of the Drawings

[0021] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0022] Figure 1 is a schematic structural diagram of a box body assembly according to an embodiment of the present utility model;

[0023] Figure 2 is an exploded schematic diagram of a battery module according to an embodiment of the present utility model;

[0024] Figure 3 is a schematic structural diagram of a first assembly member of a box body assembly according to an embodiment of the present utility model;

[0025] Figure 4 is a schematic structural diagram of a second assembly member of a box body assembly according to an embodiment of the present utility model;

[0026] Figure 5 is a schematic diagram of the assembly of the second assembly member of the box body assembly and the battery pack according to an embodiment of the present utility model;

[0027] Figure 6 is a schematic diagram of the assembly of the cover body of a battery module according to an embodiment of the present utility model.

[0028] Reference Signs:

[0029] Box body assembly 1;

[0030] The first assembly 11, the first bottom plate portion 111, the first docking plate portion 112, the first splicing edge 113, the convex structure 114;

[0031] The second assembly 12, the second bottom plate portion 121, the second docking plate portion 122, the second splicing edge 123, the concave structure 124;

[0032] The cover body 13, the abutting plate 14, the reinforcing rib 15;

[0033] The battery pack 2, the end plate 21. Specific embodiments

[0034] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where 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 by referring to the drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0036] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0037] In the related art, due to the size and shape limitations of the box body, the production efficiency is low, the production cost is high, and the assembly efficiency of the battery module is affected.

[0038] The following referenceFigures 1 - 6 Describe the housing assembly 1 according to an embodiment of the present utility model.

[0039] As Figures 1 - 5 shown, the housing assembly 1 according to the present utility model is used for a battery module. The housing assembly 1 includes a first assembly member 11 and a second assembly member 12 extending in a first direction; the first assembly member 11 and the second assembly member 12 are arranged opposite to each other, and the first assembly member 11 and the second assembly member 12 are assembled and spliced to define a receiving cavity adapted to accommodate the battery pack 2 therebetween.

[0040] For the housing assembly 1 according to the present utility model, the first assembly member 11 and the second assembly member 12 extend in the first direction, indicating that the extension directions of the first assembly member 11 and the second assembly member 12 are the same, but they are arranged opposite to each other in a direction different from the first direction, so that the first assembly member 11 and the second assembly member 12 can be assembled and spliced to form a stable frame. When the first assembly member 11 and the second assembly member 12 are assembled and spliced, a receiving cavity will be formed between the first assembly member 11 and the second assembly member 12. The size and shape of the receiving cavity are designed according to the size and shape of the accommodated battery pack 2, so that the battery pack 2 can be stably and safely placed therein. By splitting the housing assembly 1 into the first assembly member 11 and the second assembly member 12, the size and weight of a single component can be reduced, thereby reducing the size of the mold and the tonnage of the production equipment, helping to reduce the production cost and improve the production efficiency.

[0041] In addition, when assembling the battery module, the battery pack 2 can be pre-assembled with any one of the first assembly member 11 and the second assembly member 12 first, and then the other of the first assembly member 11 and the second assembly member 12 can be assembled and spliced with the pre-assembled component. The step-by-step assembly method makes the assembly process of the battery module more flexible and efficient, can increase the operation space, relieve the problem of difficulty in putting into the box, and helps to speed up the assembly efficiency.

[0042] Therefore, for the housing assembly 1 according to the present utility model, by splitting the housing assembly 1 into the first assembly member 11 and the second assembly member 12, a flexible and efficient assembly process is achieved, the operation space is increased, the production cost is reduced, and the safety and stability of the battery module are improved.

[0043] According to some embodiments of the present utility model, as Figures 2 - 4 shown, the first assembly member 11 is formed with a first splicing edge 113, the second assembly member 12 is formed with a second splicing edge 123, and the second splicing edge 123 cooperates with the first splicing edge 113 for splicing, so that the first assembly member 11 and the second assembly member 12 are connected to each other to provide necessary stability and structural strength to protect the battery pack 2 in the receiving cavity.

[0044] At least one of the first splicing edge 113 and the second splicing edge 123 is formed with a protruding raised structure 114, and at least the other of the first splicing edge 113 and the second splicing edge 123 is formed with a recessed structure 124 that matches and is recessed with the raised structure 114. The mating relationship between the raised structure 114 and the recessed structure 124 is similar to the mortise and tenon structure in woodworking. By embedding or sliding into the recessed structure 124, the raised structure 114 can achieve a tight connection and fixation between the first assembly 11 and the second assembly 12, improving the overall strength of the box assembly 1. The cooperation between the raised structure 114 and the recessed structure 124 is simple and convenient, without the need to use additional fixing parts or tools, reducing the assembly difficulty and cost.

[0045] According to some embodiments of the present invention, the first assembly 11 has a first bottom plate portion 111, the second assembly 12 has a second bottom plate portion 121, and the first bottom plate portion 111 and the second bottom plate portion 121 are spaced apart from each other and oppositely arranged in the second direction. The first bottom plate portion 111 and the second bottom plate portion 121 are not directly connected, but are arranged relatively at a certain distance, forming a space with an open outer periphery therebetween. It should be noted that the second direction intersects the first direction.

[0046] At least one of the first bottom plate portion 111 and the second bottom plate portion 121 is formed with a docking plate portion extending towards each other. The docking plate portion can be only located on the first bottom plate portion 111, or only located on the second bottom plate portion 121, or exist on both the first bottom plate portion 111 and the second bottom plate portion 121 at the same time. When the docking plate portion is only located on the first bottom plate portion 111, the docking plate portion is used to cooperate and connect with the second bottom plate portion 121; when the docking plate portion is only located on the second bottom plate portion 121, the docking plate portion is used to cooperate and connect with the first bottom plate portion 111. When both the first bottom plate portion 111 and the second bottom plate portion 121 include docking plate portions, the docking plate of the first bottom plate portion 111 and the docking plate of the second bottom plate portion 121 will cooperate and connect with each other. The function of the docking plate portion is to enclose the outer periphery of the space between the first bottom plate portion 111 and the second bottom plate portion 121, thereby defining an outer periphery-closed accommodation cavity between the first bottom plate portion 111, the second bottom plate portion 121 and the docking plate portion.

[0047] According to some embodiments of the present invention, as Figure 3 and Figure 4 shown, the docking plate portion extends at an angle from the edge of the first bottom plate portion 111 and / or the second bottom plate portion 121 in the second direction. The docking plate portion has various optional implementation manners. The docking plate portion can extend from the edge of the first bottom plate portion 111, or from the edge of the second bottom plate portion 121, or extend from the edges of both at the same time, which can make more reasonable use of the production raw materials and ensure the structural stability and strength of the box assembly 1.

[0048] The docking plate portion can extend vertically towards the interior of the receiving cavity, with a simple structure, easy to manufacture, and can provide strong structural support. The docking plate portion can also extend obliquely at a certain angle to meet specific spatial or structural requirements, for example, when a certain inclination angle needs to be formed inside the receiving cavity.

[0049] According to some embodiments of the present invention, as Figure 3 and Figure 4 shown, the docking plate portion is divided into a first docking plate portion 112 and a second docking plate portion 122. The first docking plate portion 112 extends from the two side edges of the first bottom plate portion 111, and the second docking plate portion 122 extends from the two side edges of the second bottom plate portion 121. The first docking plate portion 112 and the second docking plate portion 122 extend towards each other and are docked with each other. There is one first docking plate portion 112 on each side of the first bottom plate portion 111 and it extends towards the second assembly 12. There is one second docking plate portion 122 on each side of the second bottom plate portion 121 and it extends towards the first assembly 11. The first docking plate portion 112 and the second docking plate portion 122 extend towards each other and meet and dock at a certain position between the first bottom plate portion 111 and the second bottom plate portion 121, which is beneficial to reducing the size and mass of a single first docking plate portion 112 or second docking plate portion 122, thereby reducing the size of the mold and the tonnage of the production equipment, helping to reduce production costs and improve production efficiency.

[0050] A first splicing edge 113 is formed on the edge of the first docking plate portion 112, and a second splicing edge 123 is formed on the edge of the second docking plate portion 122, so that the first docking plate portion 112 and the second docking plate portion 122 can be connected through the cooperation of the convex structure 114 and the concave structure 124, thereby realizing the connection between the first assembly 11 and the second assembly 12, achieving a tight and stable connection, and the assembly process is simple and fast.

[0051] According to some embodiments of the present invention, as Figure 1 、 Figure 2 and Figure 6As shown, the accommodating cavity is provided with an open mouth in the first direction. The open mouth is open in the first direction, and the battery pack 2 in the accommodating cavity can be easily accessed through the open mouth. The box body assembly 1 further includes at least one cover body 13. The cover body 13 is disposed at the end of the accommodating cavity and connected to the first assembly 11 and / or the second assembly 12 to close the corresponding open mouth of the accommodating cavity. After the battery pack 2 is placed in the accommodating cavity, the cover body 13 is used to close the open mouth of the accommodating cavity to protect the battery pack 2. The cover body 13 is disposed at one end of the accommodating cavity to close the open mouth at one end of the accommodating cavity, and the cover body 13 is disposed at the other end of the accommodating cavity to close the open mouth at the other end of the accommodating cavity. By connecting the cover body 13 to the first assembly 11 and / or the second assembly 12, the cover body 13 is fixed at one end or the other end of the accommodating cavity, so that the cover body 13 can stably play a role in protecting the battery pack 2.

[0052] According to some embodiments of the present invention, as Figures 2 - 5 shown, on the inner surface of at least one end of the first assembly 11 and / or the second assembly 12 in the first direction, there is a retaining plate 14 extending towards the inside of the accommodating cavity. The retaining plate 14 is adapted to abut and limit the end plate 21 of the battery pack 2. The end plate 21 of the battery pack 2 can cooperate with the retaining plate 14 to be fixed in a specific position, ensuring the stability and safety of the battery pack 2 in the accommodating cavity.

[0053] According to some embodiments of the present invention, the retaining plate 14 is configured as multiple, and at least two of them are arranged in a staggered manner in the first direction. The end plate 21 of the battery pack 2 can be inserted between the staggered retaining plates 14. At this time, both sides of the end plate 21 abut against the retaining plate 14 respectively, so as to achieve firm fixation of the end plate 21, and the installation of the end plate 21 is convenient.

[0054] According to some embodiments of the present invention, as Figure 3 and Figure 4 shown, on the outer surface of the first assembly 11 and / or the second assembly 12, there are multiple reinforcing ribs 15 extending in the first direction. The reinforcing ribs 15 on the outer surface of the first assembly 11 and / or the second assembly 12 can improve the strength and stiffness of the box body assembly 1 without affecting the space of the accommodating cavity. The multiple reinforcing ribs 15 extend in the first direction, so that on the premise that the reinforcing ribs 15 can cover more of the outer surface of the first assembly 11 and / or the second assembly 12, the number of the reinforcing ribs 15 can be reduced, and the processing difficulty can be lowered.

[0055] A plurality of reinforcing ribs 15 are arranged parallel to each other and at intervals, optimizing the distribution of materials and reducing unnecessary material waste. The reinforcing ribs 15 can also act as heat dissipation fins. The arrangement of the reinforcing ribs 15 increases the heat dissipation area, effectively promotes heat dissipation, enhances the heat dissipation performance of the battery module, and helps to reduce the internal temperature. The size and number of the reinforcing ribs 15 should be determined according to the actual application scenario and the required strength and stiffness.

[0056] According to some embodiments of the present invention, both the first assembly 11 and the second assembly 12 are extruded profiles made of metal. By using metal materials as the base materials of the first assembly 11 and the second assembly 12, the high-strength characteristics of the metal ensure the firmness and durability of the structure of the box assembly 1, and the plasticity of the metal materials enables the first assembly 11 and the second assembly 12 to be processed into complex shapes and structures through forming processes.

[0057] The extruded profiles are made by an extrusion process. The extrusion process involves extruding molten metal or alloy through a die to form continuous profiles with specific cross-sectional shapes and lengths. The manufacturing process of the extruded profiles enables the first assembly 11 and the second assembly 12 to have high dimensional accuracy and surface quality, reducing the workload of subsequent processing and assembly.

[0058] The battery pack according to the present invention will be briefly described below.

[0059] The battery pack according to the present invention includes the box assembly 1 in any one of the above embodiments, and the first direction is the height direction of the battery pack. Since the battery pack according to the present invention includes the box assembly 1 in any one of the above embodiments, the battery pack according to the present invention has a flexible and efficient assembly process, increasing the operating space, reducing the production cost, and at the same time improving the safety and stability.

[0060] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0061] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A box assembly for a battery module, characterized in that: include: A first assembly (11) and a second assembly (12) extending in a first direction; The first assembly (11) and the second assembly (12) are arranged relative to each other, and the first assembly (11) and the second assembly (12) are assembled and spliced to define an accommodating cavity suitable for accommodating a battery pack (2) therebetween.

2. The box assembly according to claim 1, characterized in that The first assembly (11) is formed with a first splicing edge (113), and the second assembly (12) is formed with a second splicing edge (123), and the second splicing edge (123) is spliced together with the first splicing edge (113); wherein, a protruding structure (114) is formed on at least one of the first splicing edge (113) and the second splicing edge (123), and a recessed structure (124) matching the protruding structure (114) is formed on at least the other of the first splicing edge (113) and the second splicing edge (123).

3. The box assembly according to claim 2, characterized in that The first assembly (11) has a first bottom plate portion (111), and the second assembly (12) has a second bottom plate portion (121); wherein the first bottom plate portion (111) and the second bottom plate portion (121) are spaced apart from each other and arranged opposite to each other in a second direction, at least one of the first bottom plate portion (111) and the second bottom plate portion (121) is formed with a docking plate portion extending toward each other, and the accommodating cavity is defined between the first bottom plate portion (111), the second bottom plate portion (121) and the docking plate portion.

4. The box assembly according to claim 3, characterized in that The docking plate portion extends from an edge of the first bottom plate portion (111) and / or the second bottom plate portion (121) toward a second direction at an angle.

5. The box assembly according to claim 4, characterized in that: The docking plate portion comprises a first docking plate portion (112) and a second docking plate portion (122), wherein the first docking plate portion (112) extends from both sides of the first bottom plate portion (111), and the second docking plate portion (122) extends from both sides of the second bottom plate portion (121), the first docking plate portion (112) and the second docking plate portion (122) extend toward each other and dock with each other, the edge of the first docking plate portion (112) is formed with the first splicing edge (113), and the edge of the second docking plate portion (122) is formed with the second splicing edge (123).

6. The box assembly according to claim 1, characterized in that The accommodating cavity is provided with an opening in a first direction, and the box assembly further comprises: a cover (13), wherein the cover (13) is provided at an end of the accommodating cavity and connected to the first assembly (11) and / or the second assembly (12) to close the corresponding opening of the accommodating cavity.

7. The box assembly according to claim 1, characterized in that A stop plate (14) extending toward the interior of the accommodating cavity is formed on the inner surface of at least one end of the first assembly (11) and / or the second assembly (12) in the first direction, and the stop plate (14) is suitable for abutting and limiting against the end plate (21) of the battery pack (2).

8. The box assembly according to claim 1, wherein: The outer surface of the first assembly (11) and / or the second assembly (12) is formed with reinforcing ribs (15) extending along a first direction, and the reinforcing ribs (15) are parallel to each other and arranged at intervals.

9. The box assembly according to claim 1, wherein: The first assembly part (11) and the second assembly part (12) are both extruded profiles made of metal.

10. A battery pack, characterized in that: The box assembly comprises any one of claims 1-9, wherein the first direction is the height direction of the battery pack.

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