CN218472092U

CN218472092U - Aluminum shell structure of secondary battery

Info

Publication number: CN218472092U
Application number: CN202221759644.5U
Authority: CN
Inventors: 何金磊; 张方超; 赵艺惠
Original assignee: Shanghai Lanjun New Energy Technology Co Ltd
Current assignee: Shanghai Lanjun New Energy Technology Co Ltd
Priority date: 2022-07-08
Filing date: 2022-07-08
Publication date: 2023-02-10
Anticipated expiration: 2032-07-08

Abstract

The utility model relates to an aluminum shell structure of a secondary battery, which comprises an aluminum shell body (1) and heat dissipation teeth (2) arranged on the aluminum shell body (1); the heat dissipation teeth (2) are symmetrically arranged on two sides of the aluminum shell body (1), and the heat dissipation teeth (2) are through up and down. Compared with the prior art, the utility model discloses can improve the radiating effect.

Description

Aluminum shell structure of secondary battery

Technical Field

The utility model relates to a battery technology field, concretely relates to secondary battery's aluminum hull structure.

Background

The aluminum shell battery cell is usually unbalanced in surface temperature due to poor heat dissipation effect, the upper half part of the battery cell is high in temperature, and the bottom part of the battery cell is relatively low in temperature. When the temperature consistency difference is large, the capacity and the cycle life of the battery cell have worse consequences. In the existing scheme, because the cell aluminum shell is provided with the concave cell and the convex cell, when different cell cores are combined together, some air cavities with poor permeability exist between the two cell cores, so that great thermal resistance is formed, and the heat dissipation efficiency of the cell surface is low. When electric core work, a large amount of heats of production, can't be in time effectual taking away, lead to local area problem to pile up to the temperature difference who has formed electric core is big, thereby has influenced the in-service use experience of electric core.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a secondary cell's aluminum hull structure improves the radiating effect.

The purpose of the utility model can be realized by the following technical proposal: an aluminum case structure of a secondary battery comprises an aluminum case body and radiating teeth arranged on the aluminum case body; the heat dissipation teeth are symmetrically arranged on two sides of the aluminum shell body, are vertically through and can form a smooth heat dissipation channel. The heat dissipation teeth are through up and down, namely the heat dissipation teeth continuously extend to the bottom end from the top end of the aluminum shell body.

Preferably, the heat dissipation teeth are elongated heat dissipation teeth vertically arranged on the side face of the aluminum shell body.

Preferably, the height H of the heat dissipation teeth is 0.1 mm-10 mm.

Preferably, the width W of the radiating teeth is 0.1 mm-10 mm.

Preferably, a plurality of the heat dissipation teeth are arranged at equal intervals.

Further preferably, the distance between two adjacent heat dissipation teeth is 0.1 mm-50 mm.

Preferably, the aluminum shell body is of a box structure with an opening at the top end.

Further preferably, the bottom and the side of the aluminum shell body are smooth planes.

Preferably, the heat dissipation teeth are symmetrically arranged on two opposite side surfaces with the largest area of the aluminum shell body.

Preferably, the heat dissipation teeth are arranged outside the aluminum shell body.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model has the advantages that through the arrangement of the heat dissipation teeth on the aluminum shell body, the heat dissipation area of the aluminum shell body is obviously increased under the condition of slightly increasing the volume, and meanwhile, a stable and smooth heat dissipation channel can be formed, so that the heat dissipation effect is improved;

2. the utility model can improve the temperature balance of the upper part and the bottom of the battery cell by the up-down through design of the heat dissipation teeth;

3. the utility model prevents the excessive increase of the volume while ensuring the heat dissipation effect through the size design of the heat dissipation teeth, and ensures the compactness of the structure of the battery cell module;

4. the utility model is beneficial to realizing the maximization of the heat dissipation effect by arranging the heat dissipation teeth on the two opposite sides with the largest area of the aluminum shell body;

5. the utility model discloses a bottom of aluminum hull body and the smooth planar design of side prevent to influence and arrange thermal management system in the bottom surface or the side that probably exist, improve the suitability of aluminum hull body.

Drawings

Fig. 1 is a schematic view of the aluminum shell structure of the present invention;

FIG. 2 is a partial enlarged view of the aluminum-shell-structured heat-dissipating tooth of the present invention;

fig. 3 is a schematic view of the aluminum shell structure heat dissipation air channel of the present invention;

FIG. 4 is a schematic view of the aluminum case structure of comparative examples 1 to 2;

fig. 5 is a cross-sectional view of a concave cell module of comparative example 1;

fig. 6 is a schematic diagram of a concave cell module of comparative example 1;

fig. 7 is a cross-sectional view of a convex cell module of comparative example 2;

fig. 8 is a schematic view of a convex cell module of comparative example 2;

in the figure: 1-aluminum shell body, 2-radiating teeth, 3-radiating air flue, 4-first concave cell, 5-second concave cell, 6-closed air cavity, 7-first convex cell, 8-second convex cell, and 9-blocked air cavity.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments. The following examples are carried out on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following examples.

Example 1

An aluminum case structure of a secondary battery, as shown in fig. 1 to 3, can greatly increase the heat dissipation capability of an aluminum case body 1 itself through a strip-shaped heat dissipation tooth 2 formed by stretching the surface of the aluminum case body 1. Through the heat dissipation tooth 2 that the surface was densely covered for under the condition of a little increase in volume of aluminum hull body 1, heat radiating area increases obviously, and can form simultaneously and stabilize unobstructed heat dissipation air flue 3, has unobstructed heat dissipation channel from top to bottom for electric core shell.

When the battery cell works, when the temperature of the core temperature area rises, heat is transferred to the surface of the aluminum shell body 1 through heat. The abundant heat dissipation tooth 2 in aluminum hull body 1 surface can be fast with the temperature transmission on surface to the external world. After the heat is dissipated, the internal heat can be continuously transferred to the surface of the aluminum shell body 1 and then transferred to the outside through the heat dissipation teeth 2 on the surface of the aluminum shell body 1, so that a virtuous cycle is formed.

Example 2

The utility model provides a secondary cell's aluminum hull structure, 1 big face of aluminum hull body is covered densely and is covered the bar fin, forms intensive heat dissipation tooth 2, and the heat dissipation tooth height: h is more than or equal to 0.1mm and less than or equal to 10mm, and the width of the heat dissipation teeth is as follows: w is more than or equal to 0.1mm and less than or equal to 10mm, the heat dissipation teeth 2 are through up and down, a smooth heat dissipation channel (heat dissipation air channel 3) can be formed, the bottom and the side surfaces of the aluminum shell are still smooth planes, and the arrangement of a heat management system on the bottom surface or the side surface which possibly exists is not influenced.

Comparative example 1

An aluminum shell structure of a secondary battery is shown in fig. 4, and comprises an aluminum shell body which is a box body structure with an open top end, as shown in fig. 5-6, a concave battery cell is arranged in the aluminum shell body, and when a first concave battery cell 4 and a second concave battery cell 5 are combined together, a closed air cavity 6 with poor permeability exists between the two battery cells, so that large thermal resistance is formed. The heat dissipation efficiency of the surface of the battery core is low. When electric core work, a large amount of heats of production, can't be in time effectual taking away, lead to local area problem to pile up to the temperature difference who has formed electric core is big, thereby has influenced the in-service use experience of electric core.

Comparative example 2

An aluminum case structure of a secondary battery is shown in fig. 7-8, wherein a convex cell is arranged in an aluminum case body, and when a first convex cell 7 and a second convex cell 8 are combined together, an air cavity with poor permeability between the two cells is blocked 9, so that larger thermal resistance is formed. The heat dissipation efficiency of the surface of the battery core is low. When electric core work, a large amount of heats of production, unable timely effectual taking away leads to the local area problem to pile up to the temperature difference who has formed electric core is big, thereby has influenced the in-service use experience of electric core.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.

Claims

1. An aluminum shell structure of a secondary battery is characterized by comprising an aluminum shell body (1) and radiating teeth (2) arranged on the aluminum shell body (1); the heat dissipation teeth (2) are symmetrically arranged on two sides of the aluminum shell body (1), and the heat dissipation teeth (2) are through up and down.

2. The aluminum case structure of a secondary battery according to claim 1, wherein the heat dissipation teeth (2) are elongated heat dissipation teeth vertically disposed on the side of the aluminum case body (1).

3. The aluminum case structure of a secondary battery according to claim 1, wherein the height H of the heat dissipation teeth (2) is 0.1mm to 10mm.

4. The aluminum case structure of a secondary battery according to claim 1, wherein the width W of the heat dissipation teeth (2) is 0.1mm to 10mm.

5. The aluminum case structure of a secondary battery according to claim 1, wherein a plurality of the heat dissipation teeth (2) are arranged at equal intervals.

6. The aluminum case structure of a secondary battery according to claim 5, wherein the interval between two adjacent heat dissipation teeth (2) is 0.1mm to 50mm.

7. The aluminum case structure of the secondary battery as claimed in claim 1, wherein the aluminum case body (1) has a box structure with an open top.

8. The aluminum case structure of a secondary battery according to claim 7, wherein the bottom and sides of the aluminum case body (1) are smooth flat surfaces.

9. The aluminum case structure of a secondary battery according to claim 1, wherein the heat dissipation teeth (2) are symmetrically disposed on two opposite sides of the aluminum case body (1) having the largest area.

10. The aluminum case structure of a secondary battery according to any one of claims 1 to 9, wherein the heat dissipation teeth (2) are provided outside the aluminum case body (1).