Power battery shell with protection structure

Abstract

The utility model discloses a power battery shell with a protection structure, which comprises a shell body, a protection assembly is arranged in the shell body, the protection assembly comprises a protection frame, a vacuum inner cavity and a crushing plate, the outer wall of the protection frame is attached to the inner wall of the shell body, the vacuum inner cavity is arranged in the protection frame, and the crushing plate is arranged in the vacuum inner cavity. A rectangular groove is formed in the inner wall of the protection frame, and the crushing plate is fixedly mounted in the rectangular groove; through the designed protection assembly, explosion-proof protection can be carried out on the internal battery module, when the battery module explodes, instantaneous gas expansion can be generated, at the moment, the gas pressure in the shell is instantaneously increased, the crushing plate can be impacted, and the crushing plate is separated from the protection frame; and the expanded gas can enter the vacuum inner cavity in the protection frame, so that the expanded gas can be buffered and weakened, the damage to the shell caused by instantaneous increase of the air pressure during explosion is reduced, and a good explosion-proof effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of battery shell, concretely relates to a power battery shell with protection structure. BACKGROUND

[0002] Power battery is the power supply of the power source of the tool, and is mostly used for the power supply of the storage battery of electric automobile, electric train, electric bicycle and golf cart, and is the core component of new energy automobile and the important direction of future energy transformation; and the shell is one of the essential accessories on the power battery, and is used for sealing and protecting the power battery module.

[0003] The battery shell is different from the general shell, because the battery module has the risk of explosion when encountering some extreme environment, and the existing battery shell has poor protection ability for the explosion of the battery module, which causes the insecurity in the use of the battery, therefore, a new power battery shell needs to be designed to solve the problem. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a power battery shell with protection structure to solve the problem of poor protection ability of the existing battery shell for explosion.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: a power battery shell with protection structure, which comprises a protection assembly arranged in the inside of a shell body, the protection assembly comprises a protection frame, a vacuum inner cavity and a broken plate, the outer wall of the protection frame is attached to the inner wall of the shell body, the vacuum inner cavity is arranged in the inside of the protection frame, the inner wall of the protection frame is provided with a rectangular groove, the broken plate is fixedly installed in the inside of the rectangular groove, and a non-through gap is arranged between the outer edge of the broken plate and the rectangular groove.

[0006] Preferably, the protection assembly further comprises an edge groove, the edge groove is arranged on the connecting line of the broken plate and the rectangular groove, and the edge groove is not through.

[0007] Preferably, the protection assembly further comprises a sliding strip and a sliding groove, the sliding strip is fixed to the outer surface of the protection frame and is in sliding connection with the sliding groove arranged in the inner wall of the shell body.

[0008] Preferably, the protection assembly further comprises a base, a plug-in pile and a plug-in groove, the base is fixed to the inner bottom of the shell body, the protection frame is placed on the top of the base, the plug-in pile is fixed to the bottom of the protection frame and is inserted into the inside of the plug-in groove arranged on the surface of the base.

[0009] Preferably, the protection assembly further comprises a clamping ball and a clamping groove, the clamping ball is fixed to the inner wall of the plug-in groove and is clamped with the clamping groove arranged on the surface of the plug-in pile.

[0010] Preferably, the inside of the protection assembly is provided with an inner shell, and the top of the shell body is provided with a top cover.

[0011] Preferably, the outer side of the shell body is provided with a reinforcing assembly, the reinforcing assembly comprises a hoop frame, a limiting strip and a limiting groove, the hoop frame is sleeved on the outer surface of the shell body, and the limiting strip is fixed on the outer surface of the shell body and embedded into the inside of the limiting groove arranged on the inner wall of the hoop frame.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] The protection assembly can protect the battery module inside from explosion, when the battery module explodes, instantaneous gas expansion occurs, the air pressure in the shell body instantaneously increases, the broken plate is impacted to be separated from the protection frame, the expanded gas can enter the vacuum inner cavity inside the protection frame, in this way, the expanded gas can be buffered and weakened, the damage of the shell body caused by the instantaneous increase of the air pressure during explosion is reduced, and good explosion-proof effect is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic view of the utility model;

[0015] Figure 2 It is a schematic view of the protection assembly of the utility model;

[0016] Figure 3 It is a three-dimensional schematic view of the utility model; Figure 2 It is an enlarged schematic view of the A area of the utility model;

[0017] Figure 4 It is an enlarged schematic view of the B area of the utility model; Figure 1

[0018] It is a front view and sectional view of the bottom end of the protection assembly of the utility model; Figure 5

[0019] It is a front view and sectional view of the reinforcing assembly of the utility model; Figure 6 In the drawing: 100, shell body; 200, top cover; 300, protection assembly; 301, protection frame; 302, vacuum inner cavity; 303, broken plate; 304, edge groove; 305, sliding strip; 306, sliding groove; 307, base; 308, insertion pile; 309, insertion groove; 3010, clamping ball; 3011, clamping groove; 400, inner shell; 500, reinforcing assembly; 501, hoop frame; 502, limiting strip; 503, limiting groove.

[0020] DETAILED DESCRIPTION

[0021] ​With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0022] Embodiment

[0023] Please refer to Figures 1 to 6 For the embodiments of the present application, the present embodiment provides a technical solution: a power battery shell with a protection structure, which comprises a protective assembly 300 arranged inside a shell body 100. The protective assembly 300 can improve the explosion-proof performance of the shell. The protective assembly 300 comprises a protective frame 301, a vacuum inner cavity 302 and a crushing plate 303. The outer wall of the protective frame 301 is attached to the inner wall of the shell body 100. The vacuum inner cavity 302 is arranged inside the protective frame 301. The vacuum inner cavity 302 is kept in a vacuum state. The inner wall of the protective frame 301 is provided with a rectangular groove. The crushing plate 303 is fixedly installed inside the rectangular groove. A non-through gap is arranged between the outer edge of the crushing plate 303 and the rectangular groove. When the battery explodes and generates high pressure, the high-pressure gas will impact the crushing plate 303, causing it to separate from the rectangular frame on the protective frame 301. The expanding gas will enter the inside of the vacuum inner cavity 302, so that the expansion process of the gas can be buffered in time and space, thereby weakening the damage caused by the battery explosion to the shell, and playing a role in explosion protection.

[0024] In the present embodiment, preferably, the protective assembly 300 further comprises an edge groove 304. The edge groove 304 is arranged on the connecting line of the crushing plate 303 and the rectangular groove, and the edge groove 304 is not through, so that the crushing plate 303 can be more easily separated from the protective frame 301. The protective assembly 300 further comprises a sliding bar 305 and a sliding groove 306. The sliding bar 305 is fixed to the outer surface of the protective frame 301 and is in sliding connection with the sliding groove 306 arranged in the inner wall of the shell body 100, so that the protective frame 301 can be stably arranged inside the shell body 100.

[0025] In the embodiment, preferably, the protection assembly 300 further comprises a base 307, a plug post 308 and a plug groove 309, the base 307 is fixed at the inner bottom of the shell 100, the protection frame 301 is placed on the top of the base 307, the plug post 308 is fixed at the bottom of the protection frame 301 and is inserted into the plug groove 309 on the surface of the base 307, thereby completing the positioning connection between the protection frame 301 and the shell 100, the protection assembly 300 further comprises a clamping ball 3010 and a clamping groove 3011, the clamping ball 3010 is fixed on the inner wall of the plug groove 309 and is clamped with the clamping groove 3011 on the surface of the plug post 308, thereby completing the fixed connection between the protection frame 301 and the shell 100.

[0026] In the embodiment, preferably, the protection assembly 300 is internally provided with an inner shell 400, the inner shell 400 is made of elastic and breathable material, and the top of the shell 100 is provided with a top cover 200.

[0027] In the embodiment, preferably, the outer side of the shell 100 is provided with a reinforcing assembly 500, which can improve the strength of the shell 100, the reinforcing assembly 500 comprises a hoop frame 501, a limiting strip 502 and a limiting groove 503, the hoop frame 501 is sleeved on the outer surface of the shell 100, the limiting strip 502 is fixed on the outer surface of the shell 100 and is embedded into the limiting groove 503 on the inner wall of the hoop frame 501, thereby limiting the hoop frame 501 on the outer surface of the shell 100.

[0028] Although the embodiments of the utility model have been shown and described (see the above detailed description), it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A power battery shell with a protective structure, comprising a shell (100) inside which a protection assembly (300) is arranged, characterized in that: The protection assembly (300) comprises a protection frame (301), a vacuum cavity (302) and a crushing plate (303), the outer wall of the protection frame (301) is attached to the inner wall of the shell (100), the vacuum cavity (302) is arranged in the protection frame (301), the inner wall of the protection frame (301) is provided with a rectangular groove, and the crushing plate (303) is fixedly installed in the rectangular groove.

2. The power battery case with a protective structure according to claim 1, characterized in that: The protection assembly (300) further comprises an edge groove (304), the edge groove (304) is arranged on the connecting line of the crushing plate (303) and the rectangular groove, and the edge groove (304) is not through.

3. The power battery case with a protective structure according to claim 1, characterized in that: The protection assembly (300) further comprises a sliding bar (305) and a sliding groove (306), the sliding bar (305) is fixed on the outer surface of the protection frame (301) and is in sliding connection with the sliding groove (306) arranged in the inner wall of the shell (100).

4. The power battery case with a protective structure according to claim 1, characterized in that: The protection assembly (300) further comprises a base (307), a plug pile (308) and a plug groove (309), the base (307) is fixed on the inner bottom of the shell (100), the protection frame (301) is placed on the top of the base (307), the plug pile (308) is fixed on the bottom of the protection frame (301) and is inserted into the plug groove (309) arranged on the surface of the base (307).

5. The power battery case with a protective structure according to claim 4, characterized in that: The protection assembly (300) further comprises a clamping ball (3010) and a clamping groove (3011), the clamping ball (3010) is fixed on the inner wall of the plug groove (309) and is clamped with the clamping groove (3011) arranged on the surface of the plug pile (308).

6. The power battery case with protective structure according to claim 1, characterized in that: The protection assembly (300) is provided with an inner shell (400), and the top of the shell (100) is provided with a top cover (200).

7. The power battery case with protective structure according to claim 1, characterized in that: The outer side of the shell (100) is provided with a reinforcing assembly (500), the reinforcing assembly (500) comprises a hoop frame (501), a limiting strip (502) and a limiting groove (503), the hoop frame (501) is sleeved on the outer surface of the shell (100), the limiting strip (502) is fixed on the outer surface of the shell (100) and is embedded into the limiting groove (503) arranged in the inner wall of the hoop frame (501).

Images