Shell assembly and battery module

Abstract

The shell assembly comprises a first end plate and a second end plate which are oppositely arranged in the first direction, and a first side plate and a second side plate which are oppositely arranged in the second direction, and positioning bosses are arranged at the two ends of the first side plate and the two ends of the second side plate; positioning seats are arranged at the two ends of the first end plate and the two ends of the second end plate, the positioning bosses are matched with the corresponding positioning seats, so that the first end plate, the first side plate, the second end plate and the second side plate are sequentially connected end to end and define a containing cavity, and the battery cell assembly is arranged in the containing cavity. The shell assembly and the battery module disclosed by the utility model are simple in structure and simple in assembly process, and meanwhile, the battery module is more convenient to disassemble.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a housing assembly and a battery module. Background Technology

[0002] The housing assembly in a battery module provides a stable cavity for housing the battery cells. In related technologies, the housing assembly consists of end plates, side plates, and fixing brackets or steel straps. In some cases, the end plates and side plates are directly welded together, while in others, the end plates and side plates are bolted to the fixing brackets respectively. These housing structures all have problems such as complicated assembly processes and inconvenience in disassembling the battery module. Utility Model Content

[0003] The present invention aims to at least solve one of the technical problems existing in the related art. Therefore, one objective of the present invention is to provide a housing assembly with simple components that allows for rapid assembly and disassembly, thereby improving production efficiency and reducing production costs.

[0004] The housing assembly of this utility model embodiment includes a first end plate and a second end plate disposed opposite to each other along a first direction, and a first side plate and a second side plate disposed opposite to each other along a second direction. Positioning bosses are provided at both ends of the first side plate and the second side plate, and positioning seats are provided at both ends of the first end plate and the second end plate. The positioning bosses cooperate with the corresponding positioning seats to connect the first end plate, the first side plate, the second end plate, and the second side plate end to end in sequence and enclose them to form an accommodating cavity.

[0005] Optionally, at both ends of the first end plate and the second end plate, a groove is provided on the side facing away from the accommodating cavity along a third direction to form a positioning seat. The positioning boss protrudes along the first direction toward the corresponding groove, and the positioning boss is embedded in the groove to form a cooperation with the positioning seat.

[0006] Optionally, the positioning seat has a first positioning surface along a third direction, and a plurality of threaded holes are provided on the first positioning surface. The first side plate and the second side plate have a plurality of bolt holes corresponding to the threaded holes.

[0007] Optionally, the height L2 of the positioning boss along the first direction is less than the height L1 of the positioning seat.

[0008] Optionally, the positioning boss is provided with a guide angle at the connection point with the positioning seat.

[0009] Optionally, the positioning seat and the positioning boss are respectively provided with a first pre-tightening surface and a second pre-tightening surface that are parallel to each other at the connection point.

[0010] Optionally, the bolt hole is a slotted hole arranged along the second direction.

[0011] Optionally, the top of both the first end plate and the second end plate is provided with a limiting part, and the top of both the first side plate and the second side plate is provided with a limiting opening corresponding to the limiting part.

[0012] Optionally, several heat dissipation fins are provided on the outer sides of the first and second side plates.

[0013] Another objective of this invention is to provide a battery module having the aforementioned housing assembly.

[0014] The battery module of this utility model embodiment includes a cell assembly, a CSS assembly, and a housing assembly proposed in this utility model. The cell assembly is assembled in the accommodating cavity of the housing assembly, and the CSS assembly is electrically connected to the cell assembly.

[0015] The beneficial effects of the housing assembly and battery module of this utility model are as follows:

[0016] The housing assembly provided by this utility model consists of a first end plate, a second end plate, a first side plate, and a second side plate connected end to end and enclosing a cavity. The end plate and the side plate can be quickly positioned and connected through a positioning boss and a positioning seat. Compared with related technologies, the housing assembly and battery module of this utility model have a simple structure, a simple assembly process, and the battery module is also easier to disassemble. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is an exploded view of the housing assembly provided in this embodiment of the utility model;

[0019] Figure 2 This is a top view provided by an embodiment of the present invention for showing the housing assembly;

[0020] Figure 3 This is provided by the embodiment of the present utility model. Figure 2 A magnified view of a portion of region A in the middle;

[0021] Figure 4 This is a partially enlarged schematic diagram provided by an embodiment of the present invention for demonstrating the guide angle;

[0022] Figure 5 This is a partially enlarged cross-sectional view provided by an embodiment of the present invention to show the first pre-tightening surface and the second pre-tightening surface;

[0023] Figure 6 This is an exploded view of a housing assembly with a limiting platform and a limiting port structure provided in this embodiment of the present invention.

[0024] Figure 7 This is an exploded view of a battery module provided in an embodiment of this utility model.

[0025] Explanation of icon numbers:

[0026] 100. Housing assembly; 200. Cell assembly; 300. CSS assembly; 111. First end plate; 112. Second end plate; 113. Positioning seat; 114. Second positioning surface; 115. First positioning surface; 116. Threaded hole; 118. First pre-tightening surface; 119. Limiting part; 120. Groove; 121. First side plate; 122. Second side plate; 123. Positioning boss; 124. Bolt hole; 126. Second pre-tightening surface; 127. Limiting port; 128. Guide angle; 129. Heat dissipation fins; 130. Receiving cavity; 140. Bolt. Detailed Implementation

[0027] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figure 1 As shown in the description of the embodiments of this application, the first direction is... Figure 1 The x-direction in the middle, the second direction is Figure 1 In the y-direction, the third direction is Figure 1 In the z-direction, the x-direction, the y-direction, and the z-direction are all perpendicular to each other.

[0029] like Figures 1 to 3 As shown, the present invention provides a housing assembly 100, including a first end plate and a second end plate disposed opposite to each other along a first direction, and a first side plate and a second side plate disposed opposite to each other along a second direction.

[0030] Positioning bosses 123 are provided at both ends of the first side plate 121 and the second side plate 122. Positioning seats 113 are provided at both ends of the first end plate 111 and the second end plate 112. The positioning bosses and the corresponding positioning seats 113 cooperate to connect the first end plate 111, the first side plate 121, the second end plate 112 and the second side plate 122 end to end and enclose to form a receiving cavity 130. In subsequent assembly, the battery cell assembly will be placed in the receiving cavity 130.

[0031] Preferably, at both ends of the first end plate 111 and the second end plate 112, grooves 120 are provided along a third direction on the side facing away from the receiving cavity 130 to form positioning seats 113. For details, please refer to [reference needed]. Figure 4 The positioning boss 123 protrudes along the first direction toward the corresponding groove 120, and the positioning boss 123 is embedded in the groove 120 to form a cooperation with the positioning seat 113.

[0032] Preferably, the positioning seat 113 has a plurality of threaded holes 116 on its first positioning surface 115 along a third direction. The specific number of threaded holes 116 can be adjusted according to the height of the end plate and the connection strength requirements. The first side plate 121 and the second side plate 122 are both provided with bolt holes 124 corresponding to the threaded holes 116.

[0033] The following description of the embodiments focuses on the connection between the first end plate 111 and the first side plate 121. The connection between the first end plate 111 and the second side plate 122, and the connection between the second end plate 112 and the first and second side plates 121 and 122, are similar. The positioning boss 123 of the first side plate 121 is embedded in the groove 120 of the first end plate 111, and the positioning boss 123 abuts against the second positioning surface 114 of the positioning seat 113, thereby achieving rapid positioning of the two components in the second direction.

[0034] By passing a bolt 140 through the bolt hole 124 on the first side plate 121 and screwing the bolt 140 into the corresponding threaded hole 116 in the first end plate 111, the bolt connection between the first end plate 111 and the first side plate 121 is completed.

[0035] Optionally, the height L2 of the positioning boss 123 along the first direction can be set to be less than the height L1 of the positioning seat 113, as follows: Figure 3 As shown. After tightening bolt 140, the first positioning surface 115 of the positioning seat 113 abuts tightly against the inner side of the first side plate 121, thereby ensuring that the dimension of the receiving cavity 130 in the first direction is fixed to the dimension of the first end plate 111 in the first direction, that is, the width of the first end plate 111. Therefore, it is only necessary to ensure that the width of the first end plate 111 is slightly larger than the width of the cell assembly 200 to ensure that the cell assembly 200 is not squeezed by the first side plate 121 during assembly, thus providing a stable and safe receiving space for the cell assembly 200.

[0036] Optionally, the bolt hole 124 is set as a countersunk hole, so that after the bolt 140 is tightened, the head of the bolt 140 can be completely sunk into the interior of the first side plate 121 and the second side plate 122, ensuring a flat surface and improving aesthetics.

[0037] Optionally, the positioning boss 123 has a guide angle 128 on the surface that abuts against the positioning seat, specifically as follows: Figure 4As shown. When assembling the housing assembly 100, there is a situation where the first end plate 111 and the second end plate 112 have been pre-placed at both ends of the cell assembly 200, and then the first side plate 121 and the second side plate 122 are assembled. At this time, because the cell assembly 200 may lack pre-tightening, the dimensions of the first end plate 111 and the second end plate 112 in the second direction are slightly larger than the dimensions of the two positioning bosses 123 on the first side plate 121 or the second side plate 122 in the second direction, that is, there is a size difference, which makes it difficult for the two positioning bosses 123 on the same side plate to be simultaneously embedded in the positioning seat 113.

[0038] When the size difference is small, a guide angle 128 can be set on the positioning boss 123. The opening size of the guide angle 128 can accommodate the small size difference, making it smoother to simultaneously insert the two positioning bosses 123 on the same side plate into the corresponding positioning seats 113 under the above working conditions.

[0039] However, when the size difference is large, the opening size of the guide angle 128 can no longer accommodate the size difference, which will make the assembly of the first side plate 121 and the second side plate 122 very difficult. It is necessary to use other tools to pre-tighten the first end plate 111, the second end plate 112 and the cell assembly 200 before assembling the first side plate 121 and the second side plate 122.

[0040] In some embodiments, in order to solve the pre-tightening problem of the battery cell assembly 200, the second positioning surface 114 of the positioning boss 123 is set as an inclined surface to form a first pre-tightening surface 118, and the abutment surface of the corresponding positioning seat is set as an inclined surface parallel to the first pre-tightening surface 118 to form a second pre-tightening surface 126.

[0041] In practical use, when the cell assembly 200 lacks pre-tightening in the second direction and the aforementioned dimensional difference is large, a first end plate 111 and a second end plate 112 are placed at both ends of the cell assembly 200, and then the first side plate 121 and the second side plate 122 are assembled simultaneously. The first pre-tightening surface 118 and the second pre-tightening surface 126 abut against each other. During the process of the positioning boss 123 being inserted into the positioning seat 113 along the first / second pre-tightening surface, the first end plate 111 and the second end plate 112 are squeezed, causing the dimensions of the first end plate 111 and the second end plate 112 to shrink in the second direction, thereby achieving pre-tightening of the cell assembly 200 and also achieving smooth assembly of the first side plate 121 and the second side plate 122.

[0042] However, in the above assembly process, the process of the positioning boss 123 being inserted into the positioning seat 113 along the first / second pre-tightening surface still requires the use of other tools or external forces, which increases the number of assembly steps and reduces the efficiency of assembly work.

[0043] Preferably, the bolt hole 124 is configured as an oblong hole along the second direction. To address the issue that the positioning boss 123 needs additional tools or external force to embed into the positioning seat 113 along the first / second pre-tightening surface, the bolt hole 124 can be configured as an oblong hole along the second direction. In the initial state of the above-described embedding operation, if the bolt hole 124 is a round hole, there will be a misalignment along the second direction with the corresponding threaded hole 116, preventing the bolt 140 from passing through the bolt hole 124 and screwing into the corresponding threaded hole 116. Specifically, as shown... Figure 5 As shown. After setting the bolt hole 124 as an oblong hole along the second direction, in the initial state described above, the bolt 140 can smoothly pass through the oblong hole and be screwed into the corresponding threaded hole 116 normally. During the process of tightening the bolt 140, the positioning boss 123 is embedded into the positioning seat 113 along the first / second pre-tightening surface. While completing the assembly of the first side plate 121 and the second side plate 122, the first end plate 111 and the second end plate 112 are also pre-tightened along the second direction to the cell assembly 200, without the need for additional tools or external force to achieve the pre-tightening operation.

[0044] In some embodiments, the positioning seats 113 provided at both ends of the first end plate 111 and the second end plate 112 have the same dimensions in the third direction as the first end plate 111 and the second end plate 112. This end plate has a simple structure, is easy to process, and has a simple positioning method.

[0045] In other embodiments, the positioning seats 113 provided at both ends of the first end plate 111 and the second end plate 112 are smaller in the third direction than the dimensions of the first end plate 111 and the second end plate 112 in the third direction, thereby forming a limiting portion 119 on the top of the first end plate 111 and the second end plate 112. The top of the first side plate 121 and the second side plate 122 are provided with limiting openings 127 corresponding to the limiting portion 119, specifically as follows... Figure 6 As shown.

[0046] In actual use, as the positioning boss 123 of the first side plate 121 is inserted into the positioning seat 113 of the first end plate 111, the limiting part 119 of the first end plate 111 is simultaneously inserted into the limiting port 127 of the first side plate 121, thereby achieving the positioning of the first end plate 111 and the first side plate 121 along the third direction during the assembly process. The threaded hole 116 and the bolt hole 124 are also aligned at the same time, which facilitates the subsequent tightening operation of the bolt 140.

[0047] Preferably, in each embodiment, a plurality of heat dissipation fins 129 are provided on the outer side of the first side plate 121 and the second side plate 122, which can realize the heat dissipation function at the battery module level.

[0048] Preferably, the first side plate 121, the second side plate 122 and the corresponding heat dissipation fins 129 are integrally formed, and the materials can be copper, aluminum, silver and copper-aluminum alloy, which can significantly improve the heat dissipation effect of the battery module.

[0049] This utility model also provides a battery module, including a cell assembly 200, a CSS (Cells Contact System) assembly 300, and a housing assembly 100. The cell assembly 200 is assembled in the receiving cavity 130 of the housing assembly 100, and the CSS assembly 300 is electrically connected to the cell assembly 200, specifically as follows: Figure 7 As shown.

[0050] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0051] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0052] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0053] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A housing assembly, characterized in that, It includes a first end plate (111) and a second end plate (112) disposed opposite to each other along a first direction, and a first side plate (121) and a second side plate (122) disposed opposite to each other along a second direction. Both ends of the first side plate (121) and the second side plate (122) are provided with positioning bosses (123), and both ends of the first end plate (111) and the second end plate (112) are provided with positioning seats (113). The positioning bosses (123) cooperate with the corresponding positioning seats (113) so that the first end plate (111), the first side plate (121), the second end plate (112) and the second side plate (122) are connected end to end and enclosed to form a receiving cavity (130).

2. The housing assembly according to claim 1, characterized in that, At both ends of the first end plate (111) and the second end plate (112), a groove (120) is provided along a third direction on the side facing away from the accommodating cavity (130) to form the positioning seat (113). The positioning boss (123) protrudes along the first direction toward the corresponding groove (120). The positioning boss (123) is embedded in the groove (120) and cooperates with the positioning seat (113).

3. The housing assembly according to claim 2, characterized in that, The positioning seat (113) is provided with a first positioning surface (115) along a third direction. The first positioning surface (115) is provided with a plurality of threaded holes (116). The first side plate (121) and the second side plate (122) are provided with a plurality of bolt holes (124) corresponding to the threaded holes (116).

4. The housing assembly according to claim 3, characterized in that, The height L2 of the positioning boss (123) along the first direction is less than the height L1 of the positioning seat (113).

5. The housing assembly according to claim 4, characterized in that, The positioning boss (123) is provided with a guide angle (128) at the connection point with the positioning seat (113).

6. The housing assembly according to claim 4, characterized in that, The positioning seat (113) and the positioning boss (123) are respectively provided with a first pre-tightening surface (118) and a second pre-tightening surface (126) that are parallel to each other at the connection.

7. The housing assembly according to claim 6, characterized in that, The bolt hole (124) is a waist-shaped hole arranged along the second direction.

8. The housing assembly according to any one of claims 1 to 7, characterized in that, The top of the first end plate (111) and the second end plate (112) are provided with a limiting part (119), and the top of the first side plate (121) and the second side plate (122) are provided with a limiting opening (127) corresponding to the limiting part (119).

9. The housing assembly according to any one of claims 1 to 7, characterized in that, The outer sides of the first side plate (121) and the second side plate (122) are provided with a number of heat dissipation fins (129).

10. A battery module, characterized in that, The device includes a cell assembly (200), a CSS assembly (300), and a housing assembly (100) as described in any one of claims 1 to 9, wherein the cell assembly (200) is assembled in the receiving cavity (130) of the housing assembly (100), and the CSS assembly (300) is electrically connected to the cell assembly (200).

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