Battery module upper cover fixing structure

Abstract

The utility model relates to a battery module upper cover fixed structure, including shell, battery module and top cap, the battery module installs in the inside of shell, the top cap is through the detachable connection with shell of connecting assembly, the connecting assembly includes two elastic members, two the elastic members are installed respectively in the left and right sides of top cap lower end surface, and the side opposite to two elastic members is provided with the clamping block, the shape of the lateral cross section of clamping block is right triangle, corresponding two clamping blocks, the square mouth that is inserted for clamping block is set up respectively in the left and right sides of the upper end surface of shell. The battery module upper cover fixed structure, compared with traditional rivet fixed or cemented fixed, through the elastic clamping cooperation of elastic member and clamping block, need not tool to complete the installation and disassembly of top cap, the design of pressing groove makes the disassembly operation more labor saving, significantly shortens the maintenance time of battery module, improves work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of battery module technology, specifically to a battery module cover fixing structure. Background Technology

[0002] In the field of battery module technology, a battery module typically consists of a base plate, side plates, and a top cover, arranging several battery cells to form a battery pack. With the booming development of the new energy industry, the structural requirements for new energy battery modules continue to rise. Enhancing the disassembly and maintainability of the module structure, while meeting its basic functions, has become an inevitable trend.

[0003] Currently, some battery modules use rivets or adhesives to fix the top cover. Riveting requires a third material as a connector, which is costly and extremely inconvenient to disassemble, and is also prone to failure. Adhesive fixing is prone to performance failure after disassembly and assembly. For example, if the double-sided tape is used to attach the top cover to the side of the battery cell, the adhesive is prone to failure during disassembly, causing the top cover to fall off easily. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a battery module cover fixing structure, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a battery module cover fixing structure, comprising a shell, a battery module, and a top cover;

[0006] The battery module is installed inside the housing, and the top cover is detachably connected to the housing via a connecting component;

[0007] The connecting assembly includes two elastic members, which are respectively installed on the left and right sides of the lower end face of the top cover. A snap-fit ​​block is provided on the opposite side of each elastic member, and the cross-sectional shape of the snap-fit ​​block is a right triangle.

[0008] Corresponding to the two snap-fit ​​blocks, square openings for inserting the snap-fit ​​blocks are respectively provided on the left and right sides of the upper end face of the outer shell, and pressing grooves are provided on the left and right sides of the outer shell, and the two pressing grooves are respectively connected to the two square openings.

[0009] The connecting assembly also includes four sleeves, which are respectively installed at the four corners of the outer surface of the housing. Pins are respectively installed at the four corners of the outer surface of the top cover, and the four pins are respectively inserted into the interior of the four sleeves.

[0010] Furthermore, the length and width of the inner wall of the square opening are respectively adapted to the length and width of the upper end of the snap-fit ​​block.

[0011] Furthermore, both elastic components are made of spring steel sheets, and their thickness does not exceed one millimeter.

[0012] Furthermore, an extended edge is integrally formed on the top of the outer casing;

[0013] Corresponding to the extended edge, a connecting groove is provided on the inner peripheral wall of the top cover for the extended edge to be inserted, so that the top cover is arranged in a wrapping shape on the outside of the outer shell.

[0014] Furthermore, a limiting ring is installed on the inner circumferential wall of the sleeve, and a groove is provided on the outer side of the pin corresponding to the limiting ring for the limiting ring to be inserted.

[0015] Furthermore, the limiting ring is made of elastic rubber.

[0016] Furthermore, the outer peripheral surface of the bottom end of the pin is chamfered to form an arc-shaped surface.

[0017] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0018] 1. Compared with traditional rivet or adhesive fixing, the battery module cover fixing structure uses elastic components and snap-fit ​​blocks to elastically engage and engage, allowing the top cover to be installed and removed without tools. The pressing groove design makes the disassembly operation easier, significantly shortening the battery module maintenance time and improving work efficiency.

[0019] 2. The battery module's top cover fixing structure, with the four corner pins and sleeves positioning and fitting together, combined with the fastening effect of the limiting ring, and the wrapping connection between the extended edge and the connecting groove, ensures the stability of the connection between the top cover and the outer shell from multiple dimensions, avoiding the risk of the top cover loosening or falling off. At the same time, the good sealing performance can also protect the internal battery module from the influence of the external environment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the top cover structure of this utility model from below;

[0023] Figure 4 This utility model Figure 3 Enlarged schematic diagram of the structure at point A;

[0024] Figure 5 This is a schematic diagram of the cross-sectional structure of the sleeve of this utility model.

[0025] In the diagram: 1. Outer shell; 2. Battery module; 3. Top cover; 4. Connecting component; 5. Extended edge; 401. Elastic component; 402. Snap-fit ​​block; 403. Pressing groove; 404. Sleeve; 405. Pin; 406. Limiting ring. Detailed Implementation

[0026] 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.

[0027] Please see Figure 1-5 The battery module cover fixing structure in this embodiment is designed to improve the ease of disassembly and assembly and connection stability of the battery module cover. The overall structure is compact and highly adaptable, and is suitable for the assembly and maintenance of various new energy battery modules.

[0028] Specifically, the outer shell 1 serves as the basic supporting component of the battery module, and a battery module 2 is installed inside it. The battery module 2 is composed of multiple cells arranged in an orderly manner. The top of the outer shell 1 is integrally formed with an extension edge 5, which extends horizontally upward along the edge of the inner wall of the top of the outer shell 1. The extension edge 5 is made of the same high-strength plastic material as the outer shell 1, which enhances the structural strength of the top of the outer shell 1.

[0029] In actual setup, the extension edge 5 at the top of the outer casing 1 and the connecting groove on the inner peripheral wall of the top cover 3 cooperate to make the top cover 3 cover the top of the outer casing 1 in a wrapping shape, which not only increases the contact area between the two and improves the sealing of the connection, but also prevents dust and moisture from entering the battery module.

[0030] Furthermore, the top cover 3 is detachably connected to the upper end of the outer shell 1 via the connecting component 4. The top cover 3 is a rectangular cover that matches the outer shell 1. The inner peripheral wall is provided with a connecting groove that matches the extension edge 5. The depth of the connecting groove is the same as the width of the extension edge 5. When the top cover 3 is installed on the outer shell 1, the extension edge 5 is inserted into the connecting groove, so that the top cover 3 is set on the outside of the outer shell 1 in a wrapping shape, which improves the sealing and stability of the connection between the two.

[0031] In actual setup, the outer shell 1 and the top cover 3 are detachably connected by the connecting component 4. This connection method eliminates the need for traditional rivets or adhesive fixation, and can be disassembled and assembled without additional tools, greatly improving the maintenance convenience of the battery module.

[0032] In detail, the connecting component 4 includes two elastic members 401, which are respectively installed on the left and right sides of the lower end face of the top cover 3. They are made of spring steel sheets with a thickness of 0.8 mm, and have good elasticity and toughness. In their natural state, they are slightly convex outward arc-shaped. Each elastic member 401 has a locking block 402 fixedly connected to its opposite side. The side cross-section of the locking block 402 is a right-angled triangle, with one right-angled side connected to the elastic member 401. The hypotenuse is set outward to facilitate insertion into the square opening of the outer shell 1.

[0033] In actual use, when the top cover 3 is installed downwards, the inclined side of the snap-fit ​​block 402 contacts the edge of the square opening, squeezing the elastic element 401 to shrink inwards. After the snap-fit ​​block 402 is fully inserted into the square opening, the elastic element 401 restores its deformation, pushing the snap-fit ​​block 402 into the square opening, thus achieving the initial fixation of the top cover 3 and the outer shell 1. The right-angled triangular snap-fit ​​block 402 design makes the fixation more secure and less likely to fall off on its own.

[0034] Furthermore, corresponding to the two latching blocks 402, square openings are respectively provided on the left and right sides of the upper end face of the outer shell 1. The length and width of the inner wall of the square openings are adapted to the length and width of the upper end of the latching block 402, ensuring that there is no obvious shaking after the latching block 402 is inserted. Pressing grooves 403 are also provided on the left and right sides of the outer shell 1. The pressing grooves 403 are inwardly recessed arc-shaped grooves that communicate with the inside of the square openings, making it easy for fingers to insert and press the elastic element 401.

[0035] In actual use, the connection structure between the pressing groove 403 and the square opening provides convenience for disassembling the top cover 3. When disassembly is required, insert your finger into the pressing groove 403 and press the elastic element 401 to make the snap block 402 disengage from the square opening, and the top cover 3 can be easily removed. The operation is simple and quick, avoiding the tediousness and structural damage of traditional rivet fixing and disassembly.

[0036] More specifically, the connecting assembly 4 also includes four sleeves 404 and four pins 405. The four sleeves 404 are respectively vertically installed at the four corners of the outer surface of the housing 1. A limiting ring 406 is fixedly installed on the inner peripheral wall of the sleeve 404. The limiting ring 406 is made of elastic rubber and has an annular protrusion. The four pins 405 are respectively vertically installed at the four corners of the outer surface of the top cover 3, corresponding one-to-one with the sleeves 404. The length of the pin 405 is the same as the depth of the sleeve 404. A groove is opened on the outer side for the limiting ring 406 to be inserted. The width and depth of the groove match the size of the limiting ring 406. The outer peripheral surface of the bottom end of the pin 405 is chamfered to form an arc surface to facilitate insertion into the sleeve 404.

[0037] In actual installation, the sleeves 404 at the four corners of the outer casing 1 and the pins 405 at the four corners of the top cover 3 cooperate to position and assist in fixing the top cover 3 and the outer casing 1 from the four corners, preventing the top cover 3 from shifting in the horizontal direction, and further enhancing the stability of the overall connection. Moreover, when the limiting ring 406 inside the sleeve 404 is fitted into the groove on the outside of the pin 405, the elasticity of the rubber generates friction, which further restricts the axial movement of the pin 405 inside the sleeve 404, making the top cover 3 more stable after installation. At the same time, it can also play a buffering role during disassembly and assembly, reducing component wear.

[0038] The working principle of the above embodiments is as follows:

[0039] (1) When installing the top cover 3, first align the top cover 3 with the outer shell 1, so that the four corner pins 405 are aligned with the sleeve 404, and at the same time, align the extension edge 5 of the outer shell 1 with the connecting groove of the top cover 3. Then press the top cover 3 down, and the arc-shaped surface at the bottom of the pin 405 guides it to smoothly enter the sleeve 404. As the pin 405 goes deeper, the limiting ring 406 in the sleeve 404 is squeezed and deformed. When the groove on the pin 405 corresponds to the position of the limiting ring 406, the limiting ring 406 restores its deformation and is embedded in the groove, completing the initial positioning. During this process, the snap-fit ​​block 402 at the lower end of the top cover 3 moves down with the top cover 3, and its inclined edge contacts the edge of the square opening of the outer shell 1. The pressure generated causes the elastic element 401 to contract and deform inward, and the snap-fit ​​block 402 smoothly enters the square opening. When the top cover 3 is fully engaged, the elastic element 401 loses pressure and returns to its natural state, pushing the locking block 402 to move outward, so that the right-angled side of the locking block 402 is locked with the inner wall of the square opening, and at the same time the extended side 5 is fully inserted into the connecting groove, thus achieving a firm connection between the top cover 3 and the outer shell 1.

[0040] (2) When disassembling the top cover 3, simply insert your fingers into the pressing grooves 403 on both sides of the outer casing 1, press the elastic element 401 to make it retract inward, and drive the snap block 402 to disengage from the square opening. At this time, lift the top cover 3 upward, and the pin 405 will overcome the friction of the limiting ring 406 under the action of the pulling force and be pulled out from the sleeve 404. The extension edge 5 will separate from the connecting groove, and the top cover 3 can be removed from the outer casing 1 to expose the internal battery module 2 for inspection or maintenance.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A battery module cover fixing structure, characterized in that: It includes a housing (1), a battery module (2), and a top cover (3); The battery module (2) is installed inside the housing (1), and the top cover (3) is detachably connected to the housing (1) via a connecting component (4); The connecting component (4) includes two elastic members (401), which are respectively installed on the left and right sides of the lower end face of the top cover (3). A snap-fit ​​block (402) is provided on the opposite side of each of the two elastic members (401), and the cross-sectional shape of the snap-fit ​​block (402) is a right triangle. Corresponding to the two snap-fit ​​blocks (402), square openings for inserting the snap-fit ​​blocks (402) are respectively provided on the left and right sides of the upper end face of the outer shell (1), and pressing grooves (403) are provided on the left and right sides of the outer shell (1), and the two pressing grooves (403) are respectively connected to the two square openings. The connecting assembly (4) further includes four sleeves (404), which are respectively installed at the four corners of the outer surface of the housing (1). Pins (405) are respectively installed at the four corners of the outer surface of the top cover (3), and the four pins (405) are respectively inserted into the interior of the four sleeves (404).

2. The battery module cover fixing structure according to claim 1, characterized in that: The length and width of the inner wall of the square opening are respectively adapted to the length and width of the upper end of the snap-fit ​​block (402).

3. The battery module cover fixing structure according to claim 1, characterized in that: Both elastic elements (401) are made of spring steel sheets and their thickness does not exceed one millimeter.

4. The battery module cover fixing structure according to claim 1, characterized in that: An extended edge (5) is integrally formed on the top of the outer shell (1); Corresponding to the extended edge (5), a connecting groove is provided on the inner peripheral wall of the top cover (3) for the extended edge (5) to be inserted, so that the top cover (3) is arranged in a wrapping shape on the outside of the outer shell (1).

5. The battery module cover fixing structure according to claim 1, characterized in that: A limiting ring (406) is installed on the inner peripheral wall of the sleeve (404). Corresponding to the limiting ring (406), a groove is provided on the outer side of the pin (405) for the limiting ring (406) to be inserted.

6. The battery module cover fixing structure according to claim 5, characterized in that: The limiting ring (406) is made of elastic rubber.

7. The battery module cover fixing structure according to claim 6, characterized in that: The outer periphery of the bottom end of the pin (405) is chamfered to form an arc surface.

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