Battery aluminum shell with anti-explosion valve

Abstract

The utility model discloses a battery aluminum shell with an explosion-proof valve, which comprises a battery aluminum shell body, the explosion-proof valve formed by stamping and a concave stamping groove are arranged on the surface of the top of the battery aluminum shell body, the explosion-proof valve is positioned at the central position of the stamping groove, and a second cover mark is formed between the explosion-proof valve and the stamping groove by stamping; the protection assembly comprises a limiting ring arranged on the outer side of the top end of the battery aluminum shell in a sleeving mode, an anti-explosion barrel connected with the limiting ring in a combined mode and a protection cover attached to the surface of the top of the anti-explosion barrel, and an integrated protruding ring is arranged on the surface of the bottom of the anti-explosion barrel; an anti-explosion safety protection design is arranged on the battery aluminum shell, when components in the battery aluminum shell explode abnormally and generate impact force, the impact force acts on the anti-explosion valve, when the anti-explosion valve explodes outwards due to the impact force, the exploded anti-explosion valve abuts against the jacking rod to move, the jacking rod jacks the anti-explosion cover, and the anti-explosion cover is opened. In the process that the jacking rod moves, the weakening spring weakens the acting force and the explosion-proof cover is exploded, the impact force of explosion is weakened.

Description

Technical Field

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

[0002] The battery casing is an important component of the battery, which plays a role in physically protecting the internal components, providing structural support for the battery, electrical insulation, and flame retardancy. There are many types of batteries, and there are also many types of battery casings. The cylindrical battery is one of them, and its battery casing is also a cylindrical structure. The internal components of the battery are set inside the cylindrical battery casing. Multiple cylindrical batteries are installed in the correct position and arranged to form a battery pack.

[0003] The cylindrical battery casing is supported by metal materials, such as aluminum alloy. The aluminum casing of the battery is generally thin. Under long-term use, if the battery components inside the casing experience thermal runaway or other abnormalities, the battery casing may explode, causing a fire. However, the existing cylindrical battery casing does not have an explosion-proof design and cannot provide explosion-proof safety in the event of a possible explosion, which is a shortcoming.

[0004] Existing cylindrical aluminum battery casings lack explosion-proof safety protection designs during use. To address this, this application proposes a battery casing with an explosion-proof valve. Utility Model Content

[0005] The purpose of this utility model is to provide a battery aluminum casing with an explosion-proof valve to solve the problem mentioned in the background art that the battery aluminum casing does not have an explosion-proof safety protection design.

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

[0007] A battery aluminum casing, the top surface of which is provided with a stamped explosion-proof valve and a recessed stamping groove, the explosion-proof valve being located at the center of the stamping groove, and a second cover mark being stamped between the explosion-proof valve and the stamping groove;

[0008] The protective assembly includes a limiting ring fitted on the outer side of the top of the battery aluminum casing, an explosion-proof cylinder connected in combination with the limiting ring, and a protective cover that fits against the top surface of the explosion-proof cylinder. The bottom surface of the explosion-proof cylinder is provided with an integral convex ring, and the top surface of the explosion-proof cylinder is provided with evenly distributed explosion-proof covers.

[0009] The damping component includes a support plate installed inside the explosion-proof cylinder, a lifting rod that slides through the support plate, a damping spring sleeved on the outer side of the top of the lifting rod, and a retaining ring fixedly connected to the outer side of the lifting rod. The bottom end of the damping spring is connected to the retaining ring, and the bottom surface of the retaining ring is in contact with the top surface of the support plate. The lifting rod and the damping spring are opposite to the corresponding explosion-proof cover.

[0010] Preferably, the limiting ring has a concave annular groove, the convex ring cooperates with the annular groove, and the outer diameter of the battery aluminum casing is 35 to 65 mm.

[0011] Preferably, a first cover mark is provided between the explosion-proof cylinder and the explosion-proof cover.

[0012] Preferably, the number of the explosion-proof cover, the lifting rod, and the weakening spring is the same as the number of the corresponding explosion-proof valve.

[0013] Preferably, the bottom end of the lifting rod of the column is a "T" shaped structure, the top end of the weakening spring contacts the surface of the corresponding explosion-proof cover, and the distance between the top end of the lifting rod and the corresponding explosion-proof cover is 1 mm.

[0014] Preferably, the top surface of the battery aluminum casing is a welding area a, and the explosion-proof valves formed by stamping are distributed at the rounded edge of the welding area a. The number of explosion-proof valves is 1, 2, 3, 4, or 5.

[0015] Preferably, the stamping groove and the explosion-proof valve have the same geometry, and the orthographic projection of the explosion-proof valve is elliptical or circular.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] In this utility model, the aluminum casing of the battery has an explosion-proof safety protection design. When an abnormal explosion occurs in the internal components of the aluminum casing of the battery and an impact force is generated, the impact force acts on the explosion-proof valve. When the explosion-proof valve is subjected to the impact force and bursts outward, the bursting explosion-proof valve pushes against the lifting rod to move. The lifting rod pushes open the explosion-proof cover. During the process of the lifting rod moving, the weakening force of the spring, and the bursting of the explosion-proof cover, the impact force of the explosion is weakened. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a top view of the explosion-proof cylinder of this utility model.

[0020] Figure 3 This is a three-dimensional structural diagram of the limiting ring of this utility model;

[0021] Figure 4 This is a cross-sectional view of the explosion-proof cylinder of this utility model;

[0022] Figure 5 This is a top view of the aluminum battery casing of Embodiment 1 of this utility model;

[0023] Figure 6This is a top view of the aluminum battery casing of Embodiment 2 of this utility model;

[0024] Figure 7 This is a top view of the aluminum battery casing of Embodiment 3 of this utility model;

[0025] Figure 8 This is a top view of the aluminum battery casing of Embodiment 4 of this utility model;

[0026] Figure 9 This is a top view of the aluminum battery casing of Embodiment 5 of this utility model;

[0027] Figure 10 This is a top view of the aluminum battery casing of Embodiment 6 of this utility model;

[0028] Figure 11 This is a top view of the aluminum battery casing of Embodiment 7 of this utility model;

[0029] Figure 12 This is a top view of the aluminum battery casing of Embodiment 8 of this utility model;

[0030] Figure 13 This is a top view of the aluminum battery casing of Embodiment 9 of this utility model;

[0031] Figure 14 This is a top view of the aluminum battery casing of Embodiment 10 of this utility model.

[0032] In the diagram: 1. Battery aluminum casing; 2. Limiting ring; 3. Explosion-proof cylinder; 4. Protective cover; 5. Support plate; 6. Lifting rod; 7. Weakening spring; 8. Explosion-proof valve; 11. Stamping groove; 12. Second cover mark; 21. Ring groove; 31. Protruding ring; 32. Explosion-proof cover; 33. First cover mark; 61. Retaining ring. Detailed Implementation

[0033] 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.

[0034] Example 1

[0035] Please see Figures 1 to 5This utility model provides a technical solution: a battery aluminum shell with an explosion-proof valve, comprising a battery aluminum shell 1, which is a cylindrical structure with a sealed top and an open bottom. An explosion-proof valve 8 and a recessed stamping groove 11 are provided on the top surface of the battery aluminum shell 1. The explosion-proof valve 8 is located at the center of the stamping groove 11. The thickness of the explosion-proof valve 8 at the stamping groove 11 is less than the thickness of the battery aluminum shell 1. A second cover mark 12 is formed between the explosion-proof valve 8 and the stamping groove 11, and the explosion-proof valve 8 has a breakable second cover mark 12 between it and the battery aluminum shell 1. The explosion-proof valve 8 serves as an explosion-proof element. When an explosion occurs inside the aluminum battery casing 1, the connection between the thin explosion-proof valve 8 and the thick aluminum battery casing 1 is more fragile than the other intact parts of the aluminum battery casing 1. The explosion-proof valve 8 is easily blown open by the explosion impact, reducing deformation and damage to other parts of the aluminum battery casing 1. The protective components include a limiting ring 2 fitted on the outer side of the top of the aluminum battery casing 1, an explosion-proof cylinder 3 connected to the limiting ring 2, and a protective cover 4 attached to the top surface of the explosion-proof cylinder 3. The limiting ring 2, the explosion-proof cylinder 3, and the protective cover 4 protect the outer side of the top of the aluminum battery casing 1, preventing other external objects from affecting the explosion-proof valve 8. The explosion-proof cylinder 3... The bottom surface of the explosion-proof cylinder 3 has an integrated protruding ring 31. The explosion-proof cylinder 3 and the limiting ring 2 are separate structures. The protruding ring 31 is inserted into the interior of the limiting ring 2. The limiting ring 2 is fixed to the battery aluminum shell 1 by adhesive. The top surface of the explosion-proof cylinder 3 has evenly distributed explosion-proof covers 32. The explosion-proof covers 32 are opposite to the lifting rod 6 and the weakening spring 7. The weakening component includes a support plate 5 installed inside the explosion-proof cylinder 3, a lifting rod 6 that slides through the support plate 5, a weakening spring 7 sleeved on the outer side of the top of the lifting rod 6, and a retaining ring 61 fixedly connected to the outer side of the lifting rod 6. Under the synergistic action of the designed lifting rod 6 and the weakening spring 7, the explosion-proof cylinder 3 is reduced. When the explosion-proof valve 8 is subjected to the impact force after the explosion, it bursts outward. The explosion-proof valve 8 acts on the lifting rod 6, causing it to move along its own axis. The retaining ring 61 compresses the weakening spring 7, which weakens the force. Then, the top of the lifting rod 6 acts on the explosion-proof cover 32, which weakens part of the impact force. Finally, the weakened force causes the explosion-proof cover 32 to burst open, which can weaken the force generated by the explosion. The bottom end of the weakening spring 7 is connected to the retaining ring 61, and the bottom surface of the retaining ring 61 is in contact with the top surface of the support plate 5. The lifting rod 6 and the weakening spring 7 are opposite to the corresponding explosion-proof cover 32.

[0036] In this embodiment, the limiting ring 2 has a concave annular groove 21, and the convex ring 31 cooperates with the annular groove 21. The outer diameter of the battery aluminum shell 1 is 35 to 65 mm. The explosion-proof cylinder 3 and the limiting ring 2 are separate structures. The convex ring 31 is inserted into the interior of the limiting ring 2, and the explosion-proof cylinder 3 and the limiting ring 2 are accurately connected.

[0037] In this embodiment, a first cover mark 33 is provided between the explosion-proof cylinder 3 and the explosion-proof cover 32. The explosion-proof cylinder 3 and the explosion-proof cover 32 have a first cover mark 33 that is easy to break. When the explosion-proof cover 32 is lifted by the lifting rod 6, the explosion-proof cover 32 will burst open to the outside, and the explosion-proof cover 32 weakens the force of the explosion.

[0038] In this embodiment, the number of explosion-proof covers 32, lifting rods 6, and weakening springs 7 is the same as the number of corresponding explosion-proof valves 8, and the number of explosion-proof covers 32, lifting rods 6, and weakening springs 7 corresponds one-to-one with the number of explosion-proof valves 8.

[0039] In this embodiment, the bottom end of the lifting rod 6 of the column has a "T" shaped structure. The bottom end of the lifting rod 6 contacts the corresponding explosion-proof valve 8, reducing the contact between the top end of the spring 7 and the surface of the corresponding explosion-proof cover 32. The distance between the top end of the lifting rod 6 and the corresponding explosion-proof cover 32 is 1 mm. The explosion-proof valve 8, which bursts open, pushes the lifting rod 6 to move. The lifting rod 6 pushes open the explosion-proof cover 32. During the movement of the lifting rod 6 and the bursting of the explosion-proof cover 32, the impact force of the explosion is reduced.

[0040] In this embodiment, the top surface of the battery aluminum casing 1 is the welding area a, and the stamped explosion-proof valve 8 is distributed at the round edge of the welding area a. There is one explosion-proof valve 8. The stamping groove 11 and the explosion-proof valve 8 have the same geometry. The orthographic projection of the explosion-proof valve 8 is elliptical. When an abnormal explosion occurs in the internal components of the battery aluminum casing 1 and an impact force is generated, the impact force acts on the explosion-proof valve 8, causing it to explode. The explosion-proof valve 8 plays the role of weakening the explosion force.

[0041] In summary: The battery aluminum casing has an explosion-proof safety protection design. When an abnormal explosion occurs in the internal components of the battery aluminum casing 1 and an impact force is generated, the impact force acts on the explosion-proof valve 8, causing it to burst open. The explosion-proof valve 8 plays a role in reducing the force of the explosion. The limiting ring 2, the explosion-proof cylinder 3, and the protective cover 4 protect the outer top of the battery aluminum casing 1, preventing other external objects from affecting the explosion-proof valve 8. When the explosion-proof valve 8 bursts outward under the impact force, the bursting explosion-proof valve 8 pushes against the lifting rod 6 to move. The lifting rod 6 pushes open the explosion-proof cover 32. During the movement of the lifting rod 6, the weakening force of the weakening spring 7, and the bursting of the explosion-proof cover 32, the impact force of the explosion is weakened, thus providing an explosion-proof design to protect the battery aluminum casing 1.

[0042] Example 2

[0043] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6This is the second embodiment of the present invention. This embodiment is based on the previous embodiment. The top surface of the battery aluminum shell 1 is the welding area a. The explosion-proof valves 8 formed by stamping are distributed at the round edge of the welding area a. There are two explosion-proof valves 8. The stamping groove 11 and the explosion-proof valves 8 have the same geometry. The orthographic projection of the explosion-proof valves 8 is elliptical.

[0044] Example 3

[0045] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 This is the third embodiment of the present invention. This embodiment is based on the previous embodiment. The top surface of the battery aluminum shell 1 is the welding area a. The explosion-proof valves 8 formed by stamping are distributed at the round edge of the welding area a. There are 3 explosion-proof valves 8. The stamping groove 11 and the explosion-proof valves 8 have the same geometry. The orthographic projection of the explosion-proof valves 8 is elliptical.

[0046] Example 4

[0047] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 8 This is the fourth embodiment of the present invention. This embodiment is based on the previous embodiment. The top surface of the battery aluminum shell 1 is the welding area a. The explosion-proof valves 8 formed by stamping are distributed at the round edge of the welding area a. There are 4 explosion-proof valves 8. The stamping groove 11 and the explosion-proof valves 8 have the same geometry. The orthographic projection of the explosion-proof valves 8 is elliptical.

[0048] Example 5

[0049] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 9 This is the fifth embodiment of the present invention. This embodiment is based on the previous embodiment. The top surface of the battery aluminum shell 1 is the welding area a. The explosion-proof valves 8 formed by stamping are distributed at the round edge of the welding area a. There are 5 explosion-proof valves 8. The stamping groove 11 and the explosion-proof valves 8 have the same geometry. The orthographic projection of the explosion-proof valves 8 is elliptical.

[0050] Example 6

[0051] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 10This is the sixth embodiment of the present utility model. This embodiment is based on the previous embodiment. The top surface of the battery aluminum shell 1 is the welding area a. The explosion-proof valve 8 formed by stamping is distributed at the circular edge of the welding area a. There is one explosion-proof valve 8. The stamping groove 11 and the explosion-proof valve 8 have the same geometry. The orthographic projection of the explosion-proof valve 8 is circular.

[0052] Example 7

[0053] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 11 This is the seventh embodiment of the present invention. This embodiment is based on the previous embodiment. The top surface of the battery aluminum shell 1 is the welding area a. The explosion-proof valves 8 formed by stamping are distributed at the circular edge of the welding area a. There are two explosion-proof valves 8. The stamping groove 11 and the explosion-proof valves 8 have the same geometry. The orthographic projection of the explosion-proof valves 8 is circular.

[0054] Example 8

[0055] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 12 This is the eighth embodiment of the present utility model. This embodiment is based on the previous embodiment. The top surface of the battery aluminum shell 1 is the welding area a. The explosion-proof valves 8 formed by stamping are distributed at the circular edge of the welding area a. There are 3 explosion-proof valves 8. The stamping groove 11 and the explosion-proof valves 8 have the same geometry. The orthographic projection of the explosion-proof valves 8 is circular.

[0056] Example 9

[0057] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 13 This is the ninth embodiment of the present utility model. This embodiment is based on the previous embodiment. The top surface of the battery aluminum shell 1 is the welding area a. The explosion-proof valves 8 formed by stamping are distributed at the circular edge of the welding area a. There are 4 explosion-proof valves 8. The stamping groove 11 and the explosion-proof valves 8 have the same geometry. The orthographic projection of the explosion-proof valves 8 is circular.

[0058] Example 10

[0059] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 14This is the tenth embodiment of the present utility model. This embodiment is based on the previous embodiment. The top surface of the battery aluminum shell 1 is the welding area a. The explosion-proof valves 8 formed by stamping are distributed at the circular edge of the welding area a. There are 5 explosion-proof valves 8. The stamping groove 11 and the explosion-proof valves 8 have the same geometry. The orthographic projection of the explosion-proof valves 8 is circular.

[0060] 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 battery aluminum casing with an explosion-proof valve, characterized in that: include A battery aluminum casing (1) has an explosion-proof valve (8) formed by stamping and a concave stamping groove (11) on its top surface. The explosion-proof valve (8) is located at the center of the stamping groove (11), and a second cover mark (12) is formed by stamping between the explosion-proof valve (8) and the stamping groove (11). The protective assembly includes a limiting ring (2) fitted on the outer side of the top of the battery aluminum shell (1), an explosion-proof cylinder (3) connected in combination with the limiting ring (2), and a protective cover (4) attached to the top surface of the explosion-proof cylinder (3). The bottom surface of the explosion-proof cylinder (3) is provided with an integral protruding ring (31), and the top surface of the explosion-proof cylinder (3) is provided with uniformly distributed explosion-proof covers (32). The damping component includes a support plate (5) installed inside the explosion-proof cylinder (3), a lifting rod (6) that slides through the support plate (5), a damping spring (7) sleeved on the outer side of the top of the lifting rod (6), and a retaining ring (61) fixedly connected to the outer side of the lifting rod (6). The bottom end of the damping spring (7) is connected to the retaining ring (61), and the bottom surface of the retaining ring (61) is in contact with the top surface of the support plate (5). The lifting rod (6) and the damping spring (7) are opposite to the corresponding explosion-proof cover (32).

2. The battery aluminum casing with an explosion-proof valve according to claim 1, characterized in that: The limiting ring (2) has a concave annular groove (21), the convex ring (31) cooperates with the annular groove (21), and the outer diameter of the battery aluminum shell (1) is 35 to 65 mm.

3. The battery aluminum casing with an explosion-proof valve according to claim 1, characterized in that: A first cover mark (33) is provided between the explosion-proof cylinder (3) and the explosion-proof cover (32).

4. The battery aluminum casing with an explosion-proof valve according to claim 1, characterized in that: The number of explosion-proof covers (32), lifting rods (6), and weakening springs (7) is the same as the number of corresponding explosion-proof valves (8).

5. The battery aluminum casing with an explosion-proof valve according to claim 1, characterized in that: The bottom end of the lifting rod (6) of the column is a "T" shaped structure, the top end of the weakening spring (7) is in contact with the surface of the corresponding explosion-proof cover (32), and the distance between the top end of the lifting rod (6) and the corresponding explosion-proof cover (32) is 1 mm.

6. The battery aluminum casing with an explosion-proof valve according to claim 1, characterized in that: The top surface of the battery aluminum casing (1) is a welding area a, and the explosion-proof valves (8) formed by stamping are distributed on the round edge of the welding area a. The number of explosion-proof valves (8) is 1, 2, 3, 4 or 5.

7. The battery aluminum casing with an explosion-proof valve according to claim 1, characterized in that: The stamping groove (11) and the explosion-proof valve (8) have the same geometry, and the orthographic projection of the explosion-proof valve (8) is elliptical or circular.

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