Shell and battery module
By using the mounting part and reserved hole structure of the reinforcement in the battery module housing, the welding process is simplified, the problem of high welding difficulty of traditional battery modules is solved, and the structural strength and assembly efficiency are improved.
Patent Information
- Application Number
- CN202323431234.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-15
- Publication Date
- 2024-12-06
- Estimated Expiration
- 2033-12-15
AI Technical Summary
The shell welding of traditional battery modules is difficult, especially when welding the middle reinforcement plate and side enclosure plate in a small space, it is easy to damage the flexible circuit board, and the welding process is complicated, which affects production efficiency.
A shell structure is designed, using a clamping part of the reinforcement to penetrate the two side walls of the shell, and the welding process is simplified by reserved holes and removable cover plates, reducing welding difficulty, and improving structural strength and assembly efficiency.
It effectively reduces the complexity of welding operations and the risk of damage to the battery cell, improves production and assembly efficiency, and improves the overall structural strength of the shell.
Smart Images
Figure CN222126778U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery packs, and in particular to a shell and a battery module. Background Art
[0002] The shell of a traditional battery module is connected by welding the bottom plate, side panels and upper cover. Multiple middle reinforcement plates are arranged between the side panels to divide the space inside the shell and provide structural support in the middle of the shell, thereby improving the overall structural strength of the shell.
[0003] In the prior art, the above-mentioned middle reinforcement plate is connected to the side panel by welding, and the weld is located in the gap between the battery cell and the side panel. The welding space here is small and the welding difficulty is high.
[0004] In the prior art, welding is generally used to connect the upper cover plate and the side panels. Therefore, the weld is close to the flexible circuit board arranged on the upper part of the battery cell, the welding is difficult, and the flexible circuit board is easily damaged during the welding process.
[0005] Therefore, there is an urgent need for a housing and a battery module to solve the above problems. Utility Model Content
[0006] According to one aspect of the utility model, an object is to provide a shell having a high overall structural strength and low difficulty in assembly and welding, thereby effectively improving production and assembly efficiency.
[0007] To achieve this purpose, the utility model adopts the following technical solutions:
[0008] The housing comprises:
[0009] A shell body, wherein the shell body is provided with an open accommodating cavity; the accommodating cavity is used to accommodate the battery cell;
[0010] At least one reinforcement member, wherein the two opposite ends of the reinforcement member are provided with clamping parts, and the two clamping parts respectively penetrate the opposite side walls of the shell body and are fixedly connected to the outer side wall of the shell body.
[0011] As a preferred solution of the shell provided by the utility model, at least one reserved hole is respectively provided on two opposite side walls of the shell body, and the clamping part can pass through the reserved hole.
[0012] As a preferred solution of the shell provided by the utility model, a gap is left between the reserved hole and the clamping part.
[0013] As a preferred solution of the shell provided by the utility model, a portion of the clamping portion located on a side of the shell body away from the accommodating cavity is bent and abuts against the shell body.
[0014] As a preferred solution of the housing provided by the utility model, the accommodating cavity is also used to accommodate a circuit board, and the circuit board is arranged on a side of the battery cell close to the opening;
[0015] The shell also includes a cover body, which includes a first cover plate and a second cover plate that are detachably connected, the second cover plate corresponds to and covers the circuit board, and the first cover plate corresponds to and covers the battery cell without the circuit board.
[0016] As a preferred solution of the shell provided by the utility model, the second cover plate is provided with a clamping hole, and the first cover plate is provided with a clamping part, and the clamping part can be detachably clamped in the clamping hole.
[0017] As a preferred solution of the shell provided by the utility model, the second cover plate is bent to form a shell connecting portion, and the shell connecting portion is connected to the shell body by connecting bolts.
[0018] As a preferred solution of the shell provided by the utility model, the reinforcement member includes a base plate and flame retardant plates stacked on opposite sides of the base plate.
[0019] As a preferred solution of the shell provided by the utility model, a connecting rib is provided on a side of the shell body facing away from the accommodating cavity.
[0020] According to another aspect of the utility model, an object is to provide a battery module, wherein the battery module comprises a shell as described in any one of the above solutions.
[0021] Beneficial effects of the utility model:
[0022] The shell provided by the utility model includes a shell body and at least one reinforcement member. The shell body is provided with an open accommodating cavity, which is used to accommodate the battery cell. The reinforcement member is arranged in the shell body to improve the overall structural strength of the shell. The two opposite ends of the reinforcement member are provided with clamping parts, and the two clamping parts respectively penetrate the opposite side walls of the shell body and are fixedly connected to the outer side wall of the shell body. In other words, when performing fixing operations such as welding on the clamping part and the shell body, it can be performed on the outside of the shell body, and the operating space is large, which effectively avoids damage to the battery cell during the welding operation, reduces the difficulty of assembly welding, and effectively improves the production assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a structural schematic diagram of a battery module provided in Embodiment 1 of the present utility model;
[0024] Figure 2 This is a schematic diagram of the exploded structure of the battery module provided in the first embodiment of the present utility model;
[0025] Figure 3 yes Figure 2 A partial enlarged view of the structure marked as A;
[0026] Figure 4 It is a partial structural schematic diagram of the housing provided in the first embodiment of the utility model;
[0027] Figure 5 It is a schematic diagram of the exploded structure of the reinforcement member provided in the first embodiment of the utility model;
[0028] Figure 6 It is a structural schematic diagram of a battery module provided in Embodiment 2 of the present utility model;
[0029] Figure 7 yes Figure 6 A partial enlarged view of the structure marked as B.
[0030] In the figure:
[0031] 10. Battery cell; 20. Circuit board;
[0032] 100, housing body; 110, reserved hole; 120, connecting rib; 121, locking portion;
[0033] 200, cover body; 210, first cover plate; 211, clamping portion; 220, second cover plate; 221, clamping hole; 222, shell connecting portion; 223, connecting bolt; 224, connecting portion; 225, avoidance groove;
[0034] 300, reinforcement member; 310, clamping portion; 320, base plate; 330, flame retardant plate. DETAILED DESCRIPTION
[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0036] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0038] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0039] Embodiment 1
[0040] Figure 1 A schematic diagram showing the structure of a battery module provided in Embodiment 1 of the present utility model is shown; Figure 2 The schematic diagram of the exploded structure of the battery module provided by the first embodiment of the present utility model is shown. Figure 1 and Figure 2 The battery module includes a battery cell 10, a circuit board 20 and a housing provided in this embodiment. The number of the circuit boards 20 is two, and the two circuit boards 20 are arranged on the upper end surface of the battery cell 10, and the two circuit boards 20 are arranged at intervals along the width direction of the housing. The battery cell 10 is arranged inside the housing.
[0041] Specifically, the shell includes a shell body 100, a cover 200 and at least one reinforcement member 300. The shell body 100 is provided with an open accommodating cavity, and the battery cell 10 is accommodated in the accommodating cavity. The cover 200 is connected to the opening of the accommodating cavity and is used to cover the battery cell 10 and the circuit board 20. The reinforcement member 300 is arranged in the shell body 100 to improve the structural strength of the shell body 100, and can form a plurality of independent chambers in the internal space of the shell body 100, so as to prevent the battery cell 10 in a chamber from spreading to other chambers after thermal runaway occurs.
[0042] Continue to refer to Figure 1 and Figure 2The cover body 200 includes a first cover plate 210 and a second cover plate 220 that are detachably connected. Corresponding to the scheme of setting two circuit boards 20 in this embodiment, the cover body 200 also includes two second cover plates 220, and the two second cover plates 220 are detachably connected to both sides of the first cover plate 210 in the width direction. The second cover plate 220 can cover the circuit board 20, and the first cover plate 210 corresponds to and covers the battery cell 10 without the circuit board 20. Through the above arrangement, the second cover plate 220 is easy to disassemble, and the circuit board 20 is easy to disassemble and repair.
[0043] Specifically, the second cover plate 220 is recessed with an avoidance groove 225, and the avoidance groove 225 can avoid the electrical connection part on the circuit board 20, so as to facilitate the connection between the electrical connection part and the low-voltage wiring harness in the battery pack.
[0044] Specifically, the second cover plate 220 is bent to form a housing connection portion 222, that is, a plate-like structure with an L-shaped cross section. A portion of the second cover plate 220 is connected to the first cover plate 210 by bolts (not shown). The second cover plate 220 can cover the circuit board 20, and the housing connection portion 222 is detachably connected to the housing body 100 by a plurality of connection bolts 223.
[0045] Continue to refer to Figure 1 and Figure 2 , a connecting rib 120 is provided on the side of the shell body 100 away from the accommodating cavity. The connecting ribs 120 are specifically two, and the two connecting ribs 120 are respectively provided at the two ends of the shell body 100 in the length direction. The connecting rib 120 can be connected to the inner side of the battery pack case to achieve reliable assembly of the battery module in the battery pack case. In other embodiments, the connecting ribs 120 can also be respectively provided at the two ends of the shell body 100 in the width direction.
[0046] Specifically, the connecting rib 120 is a rod-shaped structure, which is arranged along the width direction of the shell body 100. A plurality of locking portions 121 are spaced apart along the extending direction of the connecting rib 120, and an assembly hole is provided on the locking portion 121, and the assembly hole can be passed through by a connecting member such as a bolt, so as to achieve connection with the battery pack box.
[0047] Figure 3 Show Figure 2 A partial enlarged view of the structure marked as A; Figure 4 The schematic diagram of the partial structure of the housing provided by the first embodiment of the utility model is shown. Figure 3 and Figure 4 The two ends of the reinforcement member 300 are respectively provided with a clamping portion 310 , and the two clamping portions 310 can respectively penetrate the opposite sides of the shell body 100 , and the clamping portion 310 is fixedly connected to the side of the shell body 100 away from the battery core 10 .
[0048] Specifically, a plurality of reserved holes 110 are respectively provided on opposite sides of the housing body 100. Figure 3 The clamping portion 310 passes through the reserved hole 110, and a gap is left between the reserved hole 110 and the clamping portion 310. The gap can be used to release pressure when the battery cell 10 has thermal runaway, so as to reduce the risk of explosion caused by excessive pressure inside the shell body 100 due to thermal runaway.
[0049] More specifically, the portion of the clamping portion 310 located on the side of the shell body 100 away from the battery cell 10 is bent to abut against the side of the shell body 100. In this embodiment, preferably, the clamping portion 310 is bent to be parallel to the side of the shell body 100. When installing the reinforcement 300, firstly, the clamping portion 310 is passed through the corresponding reserved hole 110, and then the clamping portion 310 is rolled flat outside the shell body 100 so that the clamping portion 310 is clamped on the side of the shell body 100, so as to preliminarily complete the positioning between the reinforcement 300 and the shell body 100.
[0050] More specifically, the clamping portion 310 is laser welded to the side of the housing body 100 away from the battery cell 10. Through the above arrangement, the structural integrity of the housing and the connection reliability between the reinforcement member 300 and the housing body 100 are ensured.
[0051] Figure 5 The schematic diagram of the exploded structure of the reinforcement member provided in the first embodiment of the present invention is shown. Figure 5 The reinforcement member 300 includes a substrate 320 and a flame retardant plate 330. In this embodiment, the substrate 320 is specifically made of aluminum material, and the clamping portion 310 is integrally formed at both ends of the substrate 320. The flame retardant plate 330 covers and is connected to opposite sides of the substrate 320 by gluing, and the flame retardant plate 330 is sandwiched between the substrate 320 and the battery cell 10, effectively improving the flame retardant performance of the reinforcement member 300.
[0052] Embodiment 2
[0053] Figure 6 A schematic diagram showing the structure of a battery module provided in the second embodiment of the present utility model is shown; Figure 7 Show Figure 6 A partial enlarged view of the structure marked as B. Figure 6 and Figure 7 This embodiment provides a housing. The difference between this embodiment and the first embodiment is only in the connection method between the second cover plate 220 and the first cover plate 210.
[0054] Specifically, the second cover plate 220 is provided with a plurality of connecting portions 224 at intervals along the extension direction thereof at the side edge position facing the first cover plate 210. The connecting portion 224 is provided with a snap-in hole 221. The first cover plate 210 is provided with a plurality of snap-in portions 211 at intervals along the extension direction thereof, and the snap-in portions 211 are corresponding to each other and can be detachably snap-into the snap-in holes 221. Through the above arrangement, the assembly process of the second cover plate 220 and the first cover plate 210 is further simplified, and the second cover plate 220 and the first cover plate 210 are conveniently separated to realize the maintenance or replacement of the circuit board 20.
[0055] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.
Claims
1. Shell, It is characterized in that include: A shell body (100), wherein the shell body (100) is provided with an open accommodating cavity; the accommodating cavity is used to accommodate the battery cell (10); At least one reinforcement member (300), the reinforcement member (300) being arranged in the shell body (100), and clamping portions (310) being provided at opposite ends of the reinforcement member (300), the two clamping portions (310) respectively penetrating opposite side walls of the shell body (100) and being fixedly connected to the outer side wall of the shell body (100).
2. The housing according to claim 1, It is characterized in that At least one reserved hole (110) is respectively provided on two opposite side walls of the shell body (100), and the clamping portion (310) can pass through the reserved hole (110).
3. The housing according to claim 2, It is characterized in that A gap is left between the reserved hole (110) and the clamping portion (310).
4. The housing according to claim 1, It is characterized in that A portion of the clamping portion (310) located on a side of the shell body (100) away from the accommodating cavity is bent and abuts against the shell body (100).
5. The housing according to claim 1, It is characterized in that The accommodating cavity is also used to accommodate a circuit board (20), and the circuit board (20) is arranged on a side of the battery core (10) close to the opening; The shell further comprises a cover body (200), wherein the cover body (200) comprises a first cover plate (210) and a second cover plate (220) which are detachably connected, wherein the second cover plate (220) corresponds to and covers the circuit board (20), and the first cover plate (210) corresponds to and covers the battery cell (10) which is not provided with the circuit board (20).
6. The housing according to claim 5, It is characterized in that The second cover plate (220) is provided with a clamping hole (221), and the first cover plate (210) is provided with a clamping portion (211), and the clamping portion (211) is detachably clamped in the clamping hole (221).
7. The housing according to claim 5, It is characterized in that The second cover plate (220) is bent to form a shell connecting portion (222), and the shell connecting portion (222) is connected to the shell body (100) by means of connecting bolts (223).
8. The housing according to claim 1, It is characterized in that The reinforcing member (300) comprises a base plate (320) and flame retardant plates (330) respectively stacked on two opposite sides of the base plate (320).
9. The housing according to claim 1, It is characterized in that A connecting rib (120) is provided on a side of the housing body (100) facing away from the accommodating cavity. 10.Battery module, It is characterized in that Comprising a housing as described in any one of claims 1-9.