A stable explosion-proof battery aluminum casing

Abstract

This utility model discloses a stable explosion-proof battery aluminum shell, including a shell; the bottom end face of the shell is formed by inward stamping to form a welding groove, and the welding groove forms an inner protrusion in the raised area inside the shell; a pressure relief plate is formed by stamping at the middle position of the bottom end face of the shell, and a pressure ring groove is formed between the pressure relief plate and the shell around its perimeter; through the setting of the pressure ring groove, when the internal pressure of the shell is too high, the pressure relief plate can be separated from the shell through the pressure ring groove, thereby achieving the purpose of pressure relief and explosion prevention; a raised reinforcing part is also provided on the inner bottom end face of the shell, and the reinforcing part is staggered with the inner protrusion; through the design of this utility model, the addition of reinforcing ribs to the battery aluminum shell can significantly enhance the overall structural strength of the aluminum shell; when the battery aluminum shell is subjected to external force, the reinforcing ribs can disperse and bear part of the pressure, and evenly distribute the force originally concentrated on a certain point to the entire aluminum shell structure, effectively reducing the risk of excessive local stress.

Description

Technical Field

[0001] This utility model belongs to the field of battery aluminum shell technology, specifically relating to a stable explosion-proof battery aluminum shell. Background Technology

[0002] Explosion-proof battery aluminum casings are key components developed in response to the increasing demands for battery safety. Aluminum, with its excellent electrical and thermal conductivity, can quickly dissipate the heat generated during battery operation, reducing the risk of thermal runaway. Furthermore, aluminum possesses moderate strength and toughness, allowing it to withstand a certain amount of internal pressure without cracking. In addition, aluminum casings have excellent processing properties, enabling the fabrication of complex structures.

[0003] Because batteries are inevitably subjected to various impacts and compressions during production, transportation, and use, existing explosion-proof battery aluminum casings exhibit significant limitations in dealing with these forces. Their structural strength is insufficient to withstand substantial impacts, leading to bulging of the aluminum casing after being subjected to external forces.

[0004] This bulging not only severely affects the battery's appearance, but more importantly, it disrupts the battery's internal structure, altering the relative positions of components such as electrodes and electrolyte, thus impacting battery performance and stability. Furthermore, bulging can cause internal short circuits and other safety hazards, posing a threat to user safety. Additionally, the current aluminum casing and top cover assembly uses a planar connection, leaving room for improvement in connection stability. Utility Model Content

[0005] The purpose of this invention is to provide a stable explosion-proof aluminum battery casing to solve the problem mentioned in the background art of insufficient impact resistance and easy bulging of existing battery aluminum casings.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a stable explosion-proof battery aluminum shell, comprising...

[0007] case;

[0008] The bottom surface of the housing is formed by inward stamping to create a welding groove, and the welding groove forms an inner protrusion in the raised area inside the housing.

[0009] A pressure relief plate is formed by stamping at the center of the bottom end face of the housing. A pressure ring groove is formed between the pressure relief plate and the housing. With the setting of the pressure ring groove, when the internal pressure of the housing is too high, the pressure relief plate can be separated from the housing through the pressure ring groove, thereby achieving the purpose of pressure relief and explosion prevention.

[0010] A raised reinforcing part is also provided on the inner bottom surface of the shell, and the reinforcing part is arranged alternately with the inner protrusion;

[0011] The height of the raised part of the reinforcement is lower than the height of the raised part of the inner protrusion;

[0012] The reinforcing part and the inner protrusion are arranged in a circumferential shape at the edge of the pressure ring groove;

[0013] A deformable portion is formed at the top of the shell.

[0014] Preferably, the reinforcing part is a reinforcing rib integrally formed on the bottom surface inside the shell, and the height difference between the reinforcing rib and the inner protrusion is 0.1mm to 0.4mm.

[0015] Preferably, the reinforcing part is a reinforcing rib integrally formed on the bottom surface inside the shell, and a reinforcing groove stamped on the bottom surface of the shell;

[0016] The reinforcing groove is located in the vertical projection area of ​​the reinforcing rib. By setting the reinforcing groove and the reinforcing rib, the strength of the bottom area of ​​the shell can be improved and bulging can be prevented.

[0017] Preferably, the reinforcing part is a stamped groove and a reinforcing protrusion;

[0018] The stamping groove is formed by stamping upward from the bottom of the shell, while the reinforcing protrusion is formed by stamping the groove and then raising it inside the shell. This one-piece stamping process facilitates processing, and the reinforcing protrusion after forming can improve the strength of the bottom of the shell.

[0019] Preferably, the end of the welding groove is near the edge of the bottom end face of the housing, and multiple welding grooves are provided.

[0020] Preferably, the inner wall of the top of the housing is provided with an inner annular groove, and the deformable part is a connecting part formed at the top of the housing excluding the area of ​​the inner annular groove. The top of the deformable part is bent toward the inside of the housing and has a bend.

[0021] Preferably, a deformation groove is provided on the inner wall of the connecting part.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] By adding reinforcing ribs to the aluminum battery casing through the design of this utility model, the overall structural strength of the aluminum casing can be significantly enhanced. When the aluminum battery casing is subjected to external impact, the reinforcing ribs can disperse and bear part of the pressure, distributing the force that was originally concentrated on a certain point evenly to the entire aluminum casing structure, thereby effectively reducing the risk of excessive local stress. In this way, the aluminum battery casing can better resist the impact and compression of external forces, greatly improving its impact resistance and fundamentally avoiding the occurrence of bulging, ensuring that the battery can operate stably and safely under various complex working conditions; at the same time, it can improve the tightness of assembly during installation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the explosion-proof battery aluminum shell in one embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the overall structure of the explosion-proof battery aluminum shell in another embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the internal structure of the explosion-proof battery aluminum shell of this utility model;

[0027] Figure 4 This is a schematic diagram of the overall structure of the explosion-proof battery aluminum shell in another embodiment of the present invention.

[0028] Figure 5 This utility model Figure 4 Internal diagram;

[0029] Figure 6 This is a cross-sectional view of the pressure relief plate and the pressure ring groove of this utility model;

[0030] Figure 7 This is a cross-sectional view of the aluminum shell of the explosion-proof battery of this utility model;

[0031] Figure 8 This utility model Figure 7 An enlarged schematic diagram of region A in the middle.

[0032] In the picture:

[0033] 100. Shell;

[0034] 100a, Welding groove; 100b, Inner protrusion; 100c, Stamping groove; 100d, Reinforcing groove; 100e, Reinforcing protrusion; 100f, Inner annular groove; 100g, Deformation groove;

[0035] 101. Pressure relief plate; 101a. Pressure ring groove;

[0036] 102. Reinforcing rib; 103. Connecting part; 104. Bending part. Detailed Implementation

[0037] 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.

[0038] Example 1

[0039] Reference Figure 1 , Figure 3 , Figure 6 This utility model provides a technical solution: a stable explosion-proof battery aluminum shell, comprising...

[0040] The shell is 100, with an overall diameter of 30mm to 70mm;

[0041] The bottom end face of the housing 100 is formed by inward stamping to form a welding groove 100a, and the welding groove 100a forms an inner protrusion 100b in the raised area inside the housing 100.

[0042] A pressure relief plate 101 is formed by stamping at the center of the bottom end face of the housing 100. A pressure ring groove 101a is formed between the pressure relief plate 101 and the housing 100 around its perimeter; see details below. Figure 6 By setting the pressure ring groove 101a, when the internal pressure of the housing 100 is too high, the pressure relief plate 101 can be separated from the housing 100 through the pressure ring groove 101a, thereby achieving the purpose of pressure relief and explosion prevention.

[0043] A raised reinforcing part is also provided on the inner bottom surface of the housing 100, which is staggered with the inner protrusion 100b;

[0044] The height of the bulge in the reinforcing section is lower than the height of the bulge in the inner protrusion 100b;

[0045] The reinforcing part and the inner protrusion 100b are arranged in a circumferential shape at the edge of the pressure ring groove 101a;

[0046] A deformable portion is formed on the top of the housing 100.

[0047] In this embodiment, preferably, the reinforcing part is a reinforcing rib 102 integrally formed on the bottom surface inside the shell 100, and the height difference between the reinforcing rib 102 and the inner protrusion 100b is 0.1mm to 0.4mm.

[0048] In this embodiment, preferably, the end of the welding groove 100a is near the edge of the bottom end face of the housing 100, and multiple welding grooves 100a are provided.

[0049] In this embodiment, preferably, the inner wall of the top of the housing 100 is provided with an inner annular groove 100f, and the deformable part is the connecting part 103 formed at the top of the housing 100 except for the area of ​​the inner annular groove 100f. The top of the 103 is bent toward the inside of the housing 100 and forms a bent part 104. The inner side of the bent part 104 is outside the inner annular groove 100f. Therefore, when the external device presses down on the top of the connecting part 103, the bent part 104 will bend and move downward toward the inside of the housing 100, and further realize the deformation of the subsequent connecting part 103.

[0050] Preferably, a deformation groove 100g is provided on the inner wall of the connecting part 103.

[0051] In use, the bending part 104 connects to the pressing device and is pressed down as a whole. Then, the deformation groove 100g achieves the inward bending of the entire connecting part 103. By gradually bending the initially vertical connecting part 103 towards a horizontal shape, the raw material placed inside the housing 100 is limited.

[0052] Example 2

[0053] Reference Figure 2 , Figure 3 , Figure 6 A stable explosion-proof battery aluminum casing, including

[0054] The shell is 100, with an overall diameter of 30mm to 70mm;

[0055] The bottom end face of the housing 100 is formed by inward stamping to form a welding groove 100a, and the welding groove 100a forms an inner protrusion 100b in the raised area inside the housing 100.

[0056] A pressure relief plate 101 is formed by stamping at the center of the bottom end face of the housing 100. A pressure ring groove 101a is formed between the pressure relief plate 101 and the housing 100 around its perimeter; see details below. Figure 6 By setting the pressure ring groove 101a, when the internal pressure of the housing 100 is too high, the pressure relief plate 101 can be separated from the housing 100 through the pressure ring groove 101a, thereby achieving the purpose of pressure relief and explosion prevention.

[0057] A raised reinforcing part is also provided on the inner bottom surface of the housing 100, which is staggered with the inner protrusion 100b;

[0058] The height of the bulge in the reinforcing section is lower than the height of the bulge in the inner protrusion 100b;

[0059] The reinforcing part and the inner protrusion 100b are arranged in a circumferential shape at the edge of the pressure ring groove 101a.

[0060] In this embodiment, preferably, the reinforcing part is a reinforcing rib 102 integrally formed on the bottom surface inside the housing 100, and a reinforcing groove 100d stamped on the bottom surface of the housing 100; similarly, the height difference between the reinforcing rib 102 and the inner protrusion 100b is 0.1mm to 0.4mm.

[0061] The reinforcing groove 100d is located in the vertical projection area of ​​the reinforcing rib 102. By setting the reinforcing groove 100d and the reinforcing rib 102, the strength of the bottom area of ​​the shell 100 can be improved and bulging can be prevented.

[0062] In this embodiment, preferably, the end of the welding groove 100a is near the edge of the bottom end face of the housing 100, and multiple welding grooves 100a are provided.

[0063] Example 3

[0064] Reference Figure 4 , Figure 5 , Figure 6 A stable explosion-proof battery aluminum casing, including

[0065] The shell is 100, with an overall diameter of 30mm to 70mm;

[0066] The bottom end face of the housing 100 is formed by inward stamping to form a welding groove 100a, and the welding groove 100a forms an inner protrusion 100b in the raised area inside the housing 100.

[0067] A pressure relief plate 101 is formed by stamping at the center of the bottom end face of the housing 100. A pressure ring groove 101a is formed between the pressure relief plate 101 and the housing 100 around its perimeter; see details below. Figure 6 By setting the pressure ring groove 101a, when the internal pressure of the housing 100 is too high, the pressure relief plate 101 can be separated from the housing 100 through the pressure ring groove 101a, thereby achieving the purpose of pressure relief and explosion prevention.

[0068] A raised reinforcing part is also provided on the inner bottom surface of the housing 100, which is staggered with the inner protrusion 100b;

[0069] The height of the bulge in the reinforcing section is lower than the height of the bulge in the inner protrusion 100b;

[0070] The reinforcing part and the inner protrusion 100b are arranged in a circumferential shape at the edge of the pressure ring groove 101a.

[0071] In this embodiment, preferably, the reinforcing part is a stamping groove 100c and a reinforcing protrusion 100e;

[0072] The stamping groove 100c is formed by stamping upward from the bottom of the housing 100, while the reinforcing protrusion 100e is formed by stamping the stamping groove 100c and then raising it inside the housing 100. This one-piece stamping process facilitates processing, and the formed reinforcing protrusion 100e can improve the strength of the bottom of the housing 100. The height difference between the reinforcing protrusion 100e and the inner protrusion 100b is 0.1mm to 0.4mm.

[0073] In this embodiment, preferably, the end of the welding groove 100a is near the edge of the bottom end face of the housing 100, and multiple welding grooves 100a are provided.

[0074] Although embodiments of the present invention have been shown and described (see the detailed description above), 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 stable explosion-proof battery aluminum casing, comprising: Casing (100); The bottom end face of the housing (100) is formed by inward stamping to form a welding groove (100a), and the welding groove (100a) forms an inner protrusion (100b) in the raised area inside the housing (100); A pressure relief plate (101) is formed by stamping at the middle position of the bottom end face of the housing (100), and a pressure ring groove (101a) is formed between the pressure relief plate (101) and the housing (100) around its perimeter; Its features are: A raised reinforcing part is also provided on the inner bottom surface of the housing (100), which is staggered with the inner protrusion (100b); The height of the raised portion of the reinforcement is lower than the height of the raised portion of the inner protrusion (100b); The reinforcing part and the inner protrusion (100b) are arranged in a circumferential shape at the edge of the pressure ring groove (101a); A deformable portion is formed on the top of the housing (100).

2. The stable explosion-proof battery aluminum casing according to claim 1, characterized in that: The reinforcing part is a reinforcing rib (102) integrally formed on the bottom surface inside the shell (100), and the height difference between the reinforcing rib (102) and the inner protrusion (100b) is 0.1mm to 0.4mm.

3. The stable explosion-proof battery aluminum casing according to claim 1, characterized in that: The reinforcing part is a reinforcing rib (102) integrally formed on the bottom surface inside the shell (100), and a reinforcing groove (100d) stamped on the bottom surface of the shell (100); The reinforcing groove (100d) is located in the vertical projection area of ​​the reinforcing rib (102).

4. The stable explosion-proof battery aluminum casing according to claim 1, characterized in that: The reinforcing part is a stamped groove (100c) and a reinforcing protrusion (100e); The stamping groove (100c) is formed by stamping upward from the bottom of the housing (100), while the reinforcing protrusion (100e) is formed by stamping the groove (100c) and then protruding inside the housing (100).

5. The stable explosion-proof battery aluminum casing according to claim 1, characterized in that: The end of the welding groove (100a) is near the edge of the bottom end face of the housing (100), and multiple welding grooves (100a) are provided.

6. The stable explosion-proof battery aluminum casing according to claim 1, characterized in that: The inner wall of the top of the housing (100) is provided with an inner ring groove (100f). The deformable part is a connecting part (103) formed on the top of the housing (100) except for the area of ​​the inner ring groove (100f). The top of the (103) is bent toward the inside of the housing (100) and a bent part (104) is formed.

7. The stable explosion-proof battery aluminum casing according to claim 6, characterized in that: A deformation groove (100g) is provided on the inner wall of the connecting part (103).

Images