A square aluminum battery shell that prevents swelling

Abstract

The utility model provides an anti-bulging square aluminum shell for a battery, which relates to the technical field of batteries and comprises an outer shell and a shell cover, wherein the shell cover is covered on the outer shell, an inner shell is embedded in the outer shell, both the inner shell and the outer shell are aluminum square shell structures, and a foot seat is fixed to the bottom surface of the inner shell; angle seats are fixed to both ends of the inner side of the outer shell, the angle seats are semi-arc insulating rubber shell frames, and a base frame fixed to the outer shell is arranged between the two angle seats, a rail rod is embedded on the base frame, and the foot seat is plugged and matched with the rail rod; a tenon handle is protruded from the inner edge of the shell cover, and the tenon handle is inserted between the outer shell and the inner shell, and the aluminum shell structure uses an outer shell and an inner shell that are encapsulated inside and outside to complete the sealing of the battery cell. Compared with the traditional aluminum shell structure, the structure can form a sealed space between the outer shell and the inner shell by natural separation, and the angle seats and the base frame arranged outside the inner shell can ensure the reliability and stability of the inner shell structure.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and more specifically to an anti-bulging square aluminum shell of a battery. Background Art

[0002] In recent years, with the rapid development of new energy vehicles, the demand for power batteries has also increased. According to the battery shell, power batteries are generally divided into steel shell power batteries and aluminum shell power batteries. Among them, the aluminum shell in the power battery mainly plays the role of encapsulating the core, carrying electrolyte and protecting against explosion. Usually, since lithium-ion batteries generate electricity through chemical reactions, as the battery ages, this chemical reaction is no longer completed perfectly, which may cause gas to be generated, causing the battery to swell and bulge. Compared with the outer membrane structure such as soft-pack batteries, the aluminum shell has a certain anti-deflation sealing performance, but there is still a safety risk of bulging;

[0003] In view of this, the utility model provides an effective solution to the problem that the existing aluminum shell battery structure has swelling, which causes potential safety hazards to the battery. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the traditional aluminum shell structure has the problem of battery swelling due to battery aging when packaging the battery, which affects the use of the battery and also poses a safety hazard. In view of the problems existing in the prior art, an anti-swelling square aluminum shell for the battery is provided.

[0005] The purpose and effect of the utility model are achieved by the following specific technical means: comprising an outer shell and a shell cover, the shell cover is covered on the outer shell, an inner shell is embedded in the outer shell, the inner shell and the outer shell are both aluminum square shell structures, and a foot is fixed on the bottom surface of the inner shell;

[0006] Angle seats are fixed at both ends of the inner side of the shell, and the angle seats are semi-arc-shaped insulating plastic shell frames, and a base frame fixed to the shell is arranged between the two angle seats, a rail rod is embedded on the base frame, and the foot seat is plugged and matched with the rail rod;

[0007] The inner edge of the shell cover is protruded to form a tenon handle, and the tenon handle is inserted between the outer shell and the inner shell.

[0008] Furthermore: a screw-type fixing piece is inserted into the surface of the shell cover, and the fixing piece is bolted and fixed to the inner shell.

[0009] A further preferred solution is that a buckle is inserted into one side of the connection end between the shell cover and the shell.

[0010] A further preferred solution is that the outer edges of the inner shell are fixed with side lining plates, and a sealed cavity is formed between the side lining plates and the outer shell.

[0011] A further preferred solution is that an isolation frame is provided between the side edge of the corner seat and the inner wall of the shell, and the isolation frame is an outer layer frame plate of an insulating film.

[0012] A further preferred solution is that the tenon handle is interference fit with the edge of the isolation frame.

[0013] Beneficial effects of the utility model:

[0014] The aluminum shell structure uses an outer shell and an inner shell for internal and external packaging to complete the sealing of the battery cell. Compared with the traditional aluminum shell structure, this structure can use the natural separation to form a sealed space between the outer shell and the inner shell, as well as the corner seats and base frames arranged outside the inner shell to ensure the reliability and stability of the inner shell structure, and cooperate with the external structure and the reinforcement of the outer shell to further encapsulate the battery cell, effectively avoiding the degassing caused by battery aging, and improving the safety and reliability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model will be further described below in conjunction with the accompanying drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal planar structure of the shell of the utility model;

[0018] Figure 3 It is a schematic diagram of the internal planar structure of the shell cover of the utility model;

[0019] Figure 4 It is a schematic diagram of the A enlarged structure of the utility model.

[0020] Figure 1-Figure 4 In the middle: outer shell 1, shell cover 2, fastener 3, fixing part 4, inner shell 5, side lining plate part 6, rail rod part 7, base frame 8, corner seat 9, isolation frame 10, foot seat 11, mortise handle 12. DETAILED DESCRIPTION

[0021] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, Figure 1-Figure 4 The utility model is further described in detail with specific implementation methods. The following embodiments are only examples for implementing the utility model. It must be pointed out that the disclosed embodiments do not limit the scope of the utility model. On the contrary, changes and modifications made without departing from the scope of the utility model are all within the scope of patent protection of the utility model.

[0022] An anti-bulging square aluminum battery shell comprises an outer shell 1 and a shell cover 2, wherein the shell cover 2 covers the outer shell 1, an inner shell 5 is embedded in the outer shell 1, the inner shell 5 and the outer shell 1 are both aluminum square shell structures, and a foot 11 is fixed to the bottom surface of the inner shell 5;

[0023] Angle seats 9 are fixed at both ends of the inner side of the shell 1. The angle seats 9 are semi-arc-shaped insulating plastic shell frames, and a base frame 8 fixed to the shell 1 is arranged between the two angle seats 9. A rail member 7 is embedded on the base frame 8, and the foot seat 11 is plugged and matched with the rail member 7;

[0024] The inner edge of the shell cover 2 is protruded to form a tenon handle 12, and the tenon handle 12 is inserted between the outer shell 1 and the inner shell 5;

[0025] Specifically, the structure uses the combined structure of the outer shell 1 and the inner shell 5 as the packaging end of the battery cell. The packaging structure uses the shell of the inner shell 5 as the main covering end. On the basis of the structure, the inner shell 5 is supported and fixed by the angle seat 9 and the base frame 8 erected on the bottom of the inner shell 5. The arc strength and material characteristics of the angle seat 9 structure itself make the corners of the angle seat 9 and the inner shell 5 have a certain expansion tolerance to cover and protect the expansion changes of the battery cell. The packaging of the outer shell 1 and the outer shell 5 external structure is coordinated to avoid deflation, that is, to avoid safety problems caused by the bulging of the aluminum shell structure.

[0026] At the same time, the sealing end of the shell cover 2 and the outer shell 1 is further matched by inserting the edge of the tenon handle 12 into the gap between the outer shell 1 and the inner shell 5 to isolate the sealed space between the outer shell 1 and the inner shell 5, so as to improve the sealing of the aluminum shell after packaging.

[0027] Furthermore, a screw-type fixing member 4 is inserted on the surface of the shell cover 2, and the fixing member 4 is bolted and fixed to the inner shell 5. The shell cover 2 and the inner shell 5 structure are connected by subsequently penetrating the bolted fixing member 4, so as to improve the packaging structure integrity of the shell cover 2 structure and the outer shell 1 and the shell cover 2 structure in a combined fixing manner;

[0028] At the same time, a buckle 3 is inserted into one side of the connection end between the shell cover 2 and the shell 1, and the shell 1 and the shell cover 2 are further fixed by the buckle 3;

[0029] On the basis of the above, the outer edge of the inner shell 5 is fixed with a side lining plate 6, and a sealed cavity is formed between the side lining plate 6 and the outer shell 1. The side lining plate 6 is used to further strengthen the outer packaging structure of the inner shell 5 to improve the coating strength and reliability of the inner shell 5 structure;

[0030] Furthermore, an isolation frame 10 is provided between the side edge of the corner seat 9 and the inner wall of the outer shell 1. The isolation frame 10 is an outer frame plate of an insulating film. The isolation frame 10 frame mounted on the corner seat 9 serves as a separation structure between the side surface of the corner seat 9 and the outer shell 1, further separating the inner part of the outer shell 1 and the corner seat 9 structure, and encapsulating the outer shell 1 and the inner shell 5 in multiple sections.

[0031] Furthermore, the tenon handle 12 is interference fit with the edge of the isolation frame 10, and the interference fit of the tenon handle 12 and the isolation frame 10 ensures that the inner edge of the shell cover 2 is tightly connected to the surface of the isolation frame 10, so as to further separate the outer shell 1 and the inner shell 5 structures corresponding to the two ends of the isolation frame 10 to ensure sealing.

Claims

1. A square aluminum battery shell for preventing swelling, comprising an outer shell and a shell cover, wherein the shell cover is covered on the outer shell, characterized in that: An inner shell is embedded in the outer shell, both the inner shell and the outer shell are aluminum square shell structures, and a foot base is fixed on the bottom surface of the inner shell; Angle seats are fixed at both ends of the inner side of the shell, and the angle seats are semi-arc-shaped insulating plastic shell frames, and a base frame fixed to the shell is arranged between the two angle seats, a rail rod is embedded on the base frame, and the foot seat is plugged and matched with the rail rod; The inner edge of the shell cover is protruded to form a tenon handle, and the tenon handle is inserted between the outer shell and the inner shell.

2. The anti-bulging square aluminum battery shell according to claim 1, characterized in that: A screw-type fixing piece is inserted on the surface of the shell cover, and the fixing piece is bolted and fixed to the inner shell.

3. The anti-bulging square aluminum battery shell according to claim 1, characterized in that: A buckle is inserted into one side of the connection end between the shell cover and the shell.

4. The anti-bulging square aluminum battery shell according to claim 1, characterized in that: The outer edges of the inner shell are all fixed with side lining plates, and a sealed cavity is formed between the side lining plates and the outer shell.

5. The anti-bulging square aluminum battery shell according to claim 1, characterized in that: An isolation frame is provided between the side edge of the corner seat and the inner wall of the shell, and the isolation frame is an insulating film outer layer frame plate.

6. The anti-bulging square aluminum battery shell according to claim 5, characterized in that: The tenon handle is interference fit with the edge of the isolation frame.

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