Battery module shell

Abstract

The utility model discloses a battery module shell, and relates to the technical field of battery modules, the battery module shell comprises a lower shell with an upward opening and an upper shell with a downward opening, the outer wall of the lower shell and the outer wall of the upper shell are respectively provided with a plurality of groups of arc-shaped plates, and every two arc-shaped plates correspond to each other; the two corresponding arc-shaped plates are fixedly connected with the outer wall of the lower shell and the outer wall of the upper shell correspondingly, the opposite sides of the two corresponding arc-shaped plates are both slidably connected with semicircular blocks, and the upper shell and the lower shell are rapidly locked and separated by sliding the semicircular blocks to be matched with limiting grooves of the arc-shaped plates. When the semicircular blocks make contact with the two arc-shaped plates at the same time, rigid connection is formed, disassembly difficulty caused by traditional welding or gluing is avoided, the pushing blocks and the limiting grooves are cooperatively controlled, the positions of the semicircular blocks are accurately guided when the pushing blocks slide along the pushing grooves, it is ensured that the assembling tolerance is controllable, the influence of size chain accumulative errors on the sealing performance is reduced, destructive operation is not needed, and the production efficiency is improved. The battery cell is convenient to maintain or replace, and the service life of the shell is prolonged.

Description

Technical Field

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

[0002] With the development of the new energy economy, the demand for mobile power supplies is increasing. As a combination that can directly provide electrical energy, battery modules are being used more and more widely. A battery module includes a housing and a battery. The battery is placed inside the housing so that the housing can protect the battery.

[0003] Traditional battery module housings rely on bolts or clips for fixing, which requires tools and involves complicated procedures, making it difficult to meet the needs of rapid maintenance. Some housings are also fixed by welding or gluing, which requires destructive disassembly during maintenance, increasing maintenance costs. In addition, although metal housings have high strength, they are heavy and lack elastic cushioning design, making them prone to damage to the cells due to rigid transmission during collisions. While composite material housings are lightweight, they lack sufficient sealing and impact resistance. Utility Model Content

[0004] The purpose of this invention is to provide a battery module housing that solves the problem that requires destructive disassembly during maintenance, making it difficult to meet the needs of rapid maintenance.

[0005] To solve the problems of the prior art, the technical solution of this utility model is as follows: A battery module housing includes a lower outer shell with an upward opening and an upper outer shell with a downward opening. The outer walls of the lower outer shell and the upper outer shell are provided with multiple sets of corresponding arc-shaped plates. The two corresponding arc-shaped plates are fixedly connected to the outer walls of the lower outer shell and the upper outer shell, respectively. Semicircular blocks are slidably connected to the opposite sides of the two corresponding arc-shaped plates. When one semicircular block is in contact with two arc-shaped plates at the same time, the two arc-shaped plates cannot be separated. When one semicircular block is in contact with one arc-shaped plate, the two arc-shaped plates can be separated. The two semicircular blocks do not contact each other.

[0006] Preferably, the inner side of the arc-shaped plate is provided with a limiting groove, and both sides of the semicircular block are provided with lower grooves. The inner wall of the lower groove is slidably connected to the inner wall of the limiting groove. The outer side of the arc-shaped plate is provided with a pushing groove. The outer wall of the semicircular block is fixedly connected with a pushing block. The outer wall of the pushing block is slidably connected to the inner wall of the pushing groove. The arc-shaped plate on the lower outer shell is in an upward "C" shape, and the arc-shaped plate on the upper outer shell is in a downward "C" shape.

[0007] Preferably, the inner walls of both the lower and upper outer shells are fixedly connected with spring pieces. The spring pieces are V-shaped, with the spring piece inside the lower outer shell being a downward-facing V-shape and the spring piece inside the upper outer shell being an upward-facing V-shape. The contact surfaces of the spring pieces with the inner walls of the lower and upper outer shells are flat, and the other side of the spring pieces is inclined outward.

[0008] Preferably, both the lower and upper outer shells have ventilation openings on their outer walls to drive airflow using temperature differences, thereby dissipating the heat generated during battery operation, preventing thermal runaway, improving system stability, and extending battery cycle life.

[0009] Compared with the prior art, the advantages of this utility model are as follows:

[0010] 1. This utility model achieves rapid locking and separation of the upper and lower outer shells by cooperating with the limiting groove of the sliding semicircular block and the arc plate. When the semicircular block contacts the two arc plates simultaneously, a rigid connection is formed, avoiding the disassembly difficulties caused by traditional welding or gluing. The push block and the limiting groove work together for control. When the push block slides along the push groove, it precisely guides the position of the semicircular block, ensuring controllable assembly tolerances, reducing the impact of cumulative dimensional chain errors on sealing performance, eliminating the need for destructive operations, facilitating cell inspection or replacement, and extending the service life of the shell.

[0011] 2. This utility model provides elastic support in the vertical direction through the V-shaped spring sheets on the inner walls of the upper and lower outer shells, which alleviates vibration and impact. The inclined surface design enhances the constraint on the lateral displacement of the battery cell, reduces the risk of battery cell deformation during collision, and dynamically adapts to the thermal expansion of the battery module, eliminating the risk of rigid contact damage. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the arc-shaped plate of this utility model;

[0014] Figure 3 This is a schematic diagram of the semicircular block of this utility model;

[0015] Figure 4 This is a schematic diagram of the structure of the spring sheet of this utility model.

[0016] In the attached diagram, the following are the reference numerals: 1. Lower outer shell; 2. Upper outer shell; 3. Arc plate; 4. Semicircular block; 5. Limiting groove; 6. Lower groove; 7. Pushing groove; 8. Pushing block; 9. Spring piece; 10. Ventilation opening. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Please see Figures 1-3A battery module housing includes a lower outer shell 1 with an upward opening and an upper outer shell 2 with a downward opening. The outer walls of both the lower and upper outer shells 1 and 2 are provided with multiple sets of paired arc-shaped plates 3. The arc-shaped plates 3 serve as the base of a locking mechanism. Their "C"-shaped design forms a nested structure when the housing is closed, dispersing external impact forces, improving overall torsional stiffness, distributing locking force to the housing surface, avoiding stress concentration, and simultaneously cooperating with semicircular blocks 4 to achieve geometric constraints. The two corresponding arc-shaped plates 3 are fixedly connected to the outer walls of the lower and upper outer shells 1 and 2, respectively. Semicircular blocks 4 are slidably connected to opposite sides of the two corresponding arc-shaped plates 3. The semicircular blocks 4 change their contact state by sliding, controlling the locking / unlocking: Locked state: Simultaneous contact with both upper and lower arc-shaped plates 3, forming torque balance and preventing housing separation; Unlocked state: Contact with only one side of the arc-shaped plate 3, releasing the constraint and allowing the housing to open. Separation enables maintenance-free operation of tools. Mechanical linkage replaces traditional bolt fixing, improving maintenance efficiency. When one semicircular block 4 is in contact with two arc-shaped plates 3 simultaneously, the two arc-shaped plates 3 cannot be separated. When one semicircular block 4 is in contact with one arc-shaped plate 3 respectively, the two arc-shaped plates 3 can be separated. The two semicircular blocks 4 do not contact each other. By sliding the semicircular block 4 and cooperating with the limiting groove 5 of the arc-shaped plate 3, the upper and lower shells 1 can be quickly locked and separated. When the semicircular block 4 is in contact with two arc-shaped plates 3 simultaneously, a rigid connection is formed, avoiding the disassembly difficulties caused by traditional welding or gluing. The pushing block 8 and the limiting groove 5 work together for control. When the pushing block 8 slides along the pushing groove 7, it accurately guides the position of the semicircular block 4, ensuring controllable assembly tolerances, reducing the impact of dimensional chain cumulative errors on sealing performance, eliminating the need for destructive operations, facilitating cell inspection or replacement, and extending the service life of the shell.

[0019] Please see Figure 3 The inner side of the arc plate 3 is provided with a limiting groove 5, and both sides of the semicircular block 4 are provided with a lower groove 6. The inner wall of the lower groove 6 is slidably connected to the inner wall of the limiting groove 5. The outer side of the arc plate 3 is provided with a pushing groove 7. The outer wall of the semicircular block 4 is fixedly connected with a pushing block 8. The outer wall of the pushing block 8 is slidably connected to the inner wall of the pushing groove 7. The pushing groove 7 and the pushing block 8 provide the point of application of external force. The position of the semicircular block 4 is controlled by sliding, realizing quick operation with one hand without the need for tool assistance, thus improving the efficiency of on-site maintenance. The arc plate 3 on the lower outer shell 1 is in the shape of an upward "C", and the arc plate 3 on the upper outer shell 2 is in the shape of a downward "C".

[0020] Please see Figure 4Both the lower outer shell 1 and the upper outer shell 2 have spring pieces 9 fixedly connected to their inner walls. The spring pieces 9 are V-shaped. The spring pieces 9 inside the lower outer shell 1 are downward V-shaped, and the spring pieces 9 inside the upper outer shell 2 are upward V-shaped. The contact surfaces of the spring pieces 9 with the inner walls of the lower outer shell 1 and the upper outer shell 2 are flat, and the other side of the spring pieces 9 is inclined outward. The V-shaped spring pieces 9 on the inner walls of the upper and lower outer shells 1 provide elastic support in the vertical direction, which can alleviate vibration and impact. The inclined surface design enhances the constraint on the lateral displacement of the battery cell, reduces the risk of battery cell deformation during collision, and dynamically adapts to the thermal expansion of the battery module, eliminating the risk of rigid contact damage.

[0021] Please see Figure 1 and Figure 4 Ventilation openings 10 are provided on the outer walls of both the lower outer casing 1 and the upper outer casing 2. The airflow is driven by the temperature difference to dissipate the heat generated by the battery operation, prevent thermal runaway, improve system stability, and extend battery cycle life.

[0022] In use, the battery module is placed into the lower outer shell 1, with its side contacting the spring 9. The "V"-shaped structure of the spring 9 deforms elastically under force, and the inclined surface guides the battery module to be inserted. The upper outer shell is then inserted along the outer wall of the battery module, with its side also contacting the inclined surface of the spring 9, until the lower outer shell 1 and the upper outer shell 2 are aligned and closed. At this time, the corresponding arc plate 3 is aligned. By sliding the push block 8 in the push groove 7, the semi-circular block 4 is driven to move along the limiting groove 5 on the inner side of the arc plate 3. When the semi-circular block 4 is fully inserted into the gap between the upper and lower arc plates 3, its arc-shaped outer edge simultaneously contacts the inner wall of the upper and lower arc plates 3. At this time, the geometry of the semi-circular block 4 and the arc plate 3 form a self-locking structure, preventing the upper and lower outer shells 1 from separating. The heat generated by the battery operation is naturally dissipated through the ventilation port 10 outside the shell. By sliding the semi-circular block 4 again by the push block 8 so that it only contacts one side of the arc plate 3, the geometric constraint can be released, and the upper outer shell 2 can be pulled up. Due to the failure of the locking mechanism, the shell can be easily opened, and the battery module can be taken out for maintenance or replacement.

[0023] 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 housing, comprising a lower outer shell (1) opening upwards and an upper outer shell (2) opening downwards, characterized in that: The outer walls of the lower outer shell (1) and the upper outer shell (2) are provided with multiple sets of corresponding arc plates (3). The two corresponding arc plates (3) are fixedly connected to the outer walls of the lower outer shell (1) and the upper outer shell (2) respectively. The opposite sides of the two corresponding arc plates (3) are slidably connected with semicircular blocks (4). When one semicircular block (4) is in contact with two arc plates (3) at the same time, the two arc plates (3) cannot be separated. When one semicircular block (4) is in contact with one arc plate (3) respectively, the two arc plates (3) can be separated. The two semicircular blocks (4) do not contact each other.

2. The battery module housing according to claim 1, characterized in that: The inner side of the arc plate (3) is provided with a limiting groove (5), and both sides of the semi-circular block (4) are provided with a lower groove (6). The inner wall of the lower groove (6) is slidably connected to the inner wall of the limiting groove (5).

3. The battery module housing according to claim 1, characterized in that: The outer side of the arc plate (3) is provided with a push groove (7), and the outer wall of the semi-circular block (4) is fixedly connected with a push block (8). The outer wall of the push block (8) is slidably connected to the inner wall of the push groove (7).

4. The battery module housing according to claim 1, characterized in that: The arc plate (3) on the lower outer shell (1) is in an upward "C" shape, and the arc plate (3) on the upper outer shell (2) is in a downward "C" shape.

5. The battery module housing according to claim 1, characterized in that: The inner walls of the lower outer shell (1) and the upper outer shell (2) are both fixedly connected with spring pieces (9), which are in the shape of "V".

6. The battery module housing according to claim 5, characterized in that: The inner spring (9) of the lower outer shell (1) is in a downward "V" shape, and the inner spring (9) of the upper outer shell (2) is in an upward "V" shape.

7. The battery module housing according to claim 5, characterized in that: The contact surfaces of the spring piece (9) with the inner walls of the lower outer shell (1) and the upper outer shell (2) are flat, and the other side of the spring piece (9) is inclined outward.

8. The battery module housing according to claim 1, characterized in that: Ventilation openings (10) are provided on the outer walls of both the lower outer shell (1) and the upper outer shell (2).

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