Battery cell structure and battery cell module
By setting a fin structure between the battery cell body and the shell component, the problem of large temperature difference between the upper and lower layers of the battery is solved, and a more uniform heat dissipation effect is achieved.
Patent Information
- Application Number
- CN202422632570.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-10-29
AI Technical Summary
In existing liquid cooling systems, the temperature difference between the upper and lower layers of the battery is large, resulting in uneven heat dissipation.
A fin structure is provided between the battery cell body and the shell member, and the difference in spacing between the first open end and the second open end of the fin group is utilized to allow air to flow rapidly in the gap interval, thereby enhancing the heat dissipation effect.
The design of the fin structure reduces the temperature difference between the upper and lower positions of the battery cell, thereby improving the heat dissipation efficiency of the battery cell.
Smart Images
Figure CN223378360U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of batteries, and particularly relates to a battery core structure and a battery core module. Background Art
[0002] With the further expansion of the electric vehicle market and the continuous improvement of the requirements for driving range, the capacity of batteries has been continuously improved, and the demand for fast charging and discharging has caused the temperature of batteries to rise rapidly. The commonly used liquid cooling system now has a liquid cooling plate placed in the box below the battery, which often leads to a temperature difference between the lower and upper temperatures. Utility Model Content
[0003] The purpose of the present invention is to provide a battery cell structure and a battery cell module to solve the problem of large temperature difference between the upper and lower parts of the battery cell structure proposed in the above background technology.
[0004] To achieve the above objectives, the present invention provides the following technical solutions: a battery cell structure, comprising:
[0005] The battery cell body has a first end surface and a second end surface in a first direction;
[0006] a shell member, assembled on the outside of the battery body, with the first end face and / or the second end face arranged in a first direction and at a distance from the shell member, and a gap formed between the first end face and / or the second end face and the shell member;
[0007] A fin structure is arranged in the gap interval and assembled on the battery cell body. The fin structure includes multiple groups of fin groups continuously arranged along the second direction. A single group of fin groups includes two fin components arranged at intervals in the second direction, and a first open end and a second open end are formed at both ends in the third direction. The spacing between the two fin components in the single group of fin groups at the first open end position is greater than the spacing between the two fin components at the second open end position.
[0008] By arranging a fin structure in the gap between the battery cell body and the shell component, based on the spacing difference between the first open end and the second open end in a single group of fins, air can flow rapidly in the gap to reduce the temperature difference between the upper and lower positions, while increasing the contact area between the surface of the battery cell structure and the air, thereby enhancing the heat dissipation effect.
[0009] Preferably, a single fin member has a first end and a second end, and the first ends of the two fin members constituting a single fin group are spaced apart in the second direction, and the second ends gradually approach each other in the second direction while extending along the third direction.
[0010] Preferably, the two fin members of a single fin group are formed as two waist sides of an isosceles trapezoid.
[0011] Preferably, the two fin components of a single fin group are formed as two waist sides of a right-angled trapezoid.
[0012] Preferably, the fin structure is assembled on the first end surface and / or the second end surface.
[0013] Preferably, the housing member is made of aluminum.
[0014] The present application also provides a battery cell module, comprising:
[0015] Multiple battery core structures, wherein the multiple battery core structures are stacked sequentially along a first direction, and aerogel is provided between adjacent battery core structures, and the battery core structure comprises:
[0016] The battery cell body has a first end surface and a second end surface in a first direction;
[0017] a shell member, assembled on the outside of the battery body, with the first end face and / or the second end face arranged in a first direction and at a distance from the shell member, and a gap formed between the first end face and / or the second end face and the shell member;
[0018] A fin structure is arranged in the gap interval and assembled on the battery cell body. The fin structure includes multiple groups of fin groups continuously arranged along the second direction. A single group of fin groups includes two fin components arranged at intervals in the second direction, and a first open end and a second open end are formed at both ends in the third direction. The spacing between the two fin components in the single group of fin groups at the first open end position is greater than the spacing between the two fin components at the second open end position.
[0019] Preferably, the battery cell module further includes end plate components arranged at both ends in the first direction.
[0020] Preferably, the battery cell module further comprises a cover plate member provided at one end in the third direction, and the cover plate member is connected to the two end plate members in the first direction.
[0021] Preferably, the second opening end is arranged adjacent to the end plate member in the third direction. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is the overall schematic diagram of the battery module;
[0023] Figure 2 It is a schematic diagram of the overall structure of the battery cell;
[0024] Figure 3 Schematic diagram of the top view of the battery cell structure;
[0025] Figure 4 Schematic diagram of the fin structure.
[0026] In the picture:
[0027] 1. Aerogel; 2. Cover plate member; 3. Cell structure; 301. Cell body; 301a. First end face; 301b. Second end face; 302. Shell member; 303. Fin structure; 304. Fin group; 305. Fin member; 305a. First end; 305b. Second end; 306. Gap region; 4. End plate member. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0029] Reference Figure 1 , is a schematic diagram of the battery cell module structure. The battery cell module is formed by stacking multiple battery cell structures 3 along a first direction. The contact surfaces of adjacent battery cell structures 3 are separated by aerogel 1. In the description of this embodiment, the first direction is the width direction of the battery cell structure 3, and correspondingly, the second direction is the length direction of the battery cell structure 3, and the third direction is the height direction of the battery cell structure 3. Back to Figure 1 Continuing to explain the battery cell structure 3, the above-mentioned battery cell module is provided with end plate components 4 at both ends of the first direction, and is provided with a cover plate component 2 at one end in the third direction. The two ends of the cover plate component 2 in the first direction are respectively connected to the two end plate components 4, and the cover plate component 2 and the two end plate components 4 jointly form a stacking interval of the battery cell structure 3.
[0030] Reference Figure 2 and 3 , are respectively an overall schematic diagram and a top schematic diagram of the battery cell structure 3, the above-mentioned battery cell structure 3 includes a battery cell body 301 and a shell member 302, the shell member 302 is covered on the outside of the battery cell body 301, for protecting the battery cell body 301, illustratively, the above-mentioned shell member 302 is made of aluminum material, wherein the above-mentioned battery cell body 301 has a first end face 301a and a second end face 301b in the first direction, further, the above-mentioned first end face 301a and / or the second end face 301b are spaced apart from the shell member 302 in the first direction, and a gap interval 306 is formed between the first end face 301a and / or the second end face 301b and the shell member 302. In some embodiments, referring to Figure 4The cell structure 3 is provided with a fin structure 303 in the gap interval 306. The fin structure 303 is fixed on the first end surface 301a and / or the second end surface 301b and is composed of a plurality of fin groups 304 continuously arranged along the second direction. A single fin group 304 includes two fin members 305 spaced apart in the second direction and formed with a first open end and a second open end at both ends in the third direction. The spacing between the two fin members 305 at the first open end is greater than the spacing between the two fin members 305 at the second open end. In some embodiments, In the embodiment, the second open end is constituted as one end of the cover member 2 in the adjacent cell module in the cell structure 3. At this time, the first open end is constituted as one end of the liquid cooling plate in the adjacent cell module in the cell structure 3. Further, the single fin member 305 has a first end 305a and a second end 305b. The first ends 305a of the two fin members 305 constituting the single fin group 304 are spaced apart in the second direction, and the second ends 305b gradually approach each other in the second direction while extending along the third direction. That is, the two fin members in the single fin group 304 are spaced apart in the second direction. The spacing between the fin members 305 in the second direction gradually decreases as the first end 305a extends toward the second end 305b. In some examples, the two fin members 305 in a single fin group 304 form two waist sides of an isosceles trapezoid. In another example, the two fin members 305 in a single fin group 304 form two waist sides of a right-angled trapezoid. At this time, the air forms a chimney effect in the fin members 305, that is, the air rises or falls along the space with a vertical slope, causing the air to strengthen convection. In other words, the air is very stable along the channel due to the effect of density difference. At this time, when the battery cell structure 3 is discharged and charged at a large rate, the temperature of the battery cell body 301 rises, and the liquid cooling plate at the bottom of the battery cell body 301 starts liquid cooling circulation; the air temperature between the battery cell fins rises, begins to float, and is discharged from the second opening end at an accelerated rate, and the cold air close to the liquid cooling plate is sucked in from the first opening end to accelerate the heat dissipation of the battery cell. At the same time, the above-mentioned fin member 305 is arranged on the first end 305a surface and / or the second end 305b surface, which correspondingly increases the contact area between the surface of the battery cell body 301 and the air, thereby increasing heat exchange.
[0031] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A battery cell structure, characterized in that: include: The battery cell body has a first end surface and a second end surface in a first direction; a shell member, assembled on the outside of the battery body, with the first end face and / or the second end face arranged in a first direction and at a distance from the shell member, and a gap formed between the first end face and / or the second end face and the shell member; A fin structure is arranged in the gap interval and assembled on the battery cell body. The fin structure includes multiple groups of fin groups continuously arranged along the second direction. A single group of fin groups includes two fin components arranged at intervals in the second direction, and a first open end and a second open end are formed at both ends in the third direction. The spacing between the two fin components in the single group of fin groups at the first open end position is greater than the spacing between the two fin components at the second open end position.
2. A battery core structure according to claim 1, characterized in that: A single fin member has a first end and a second end. The first ends of the two fin members constituting a single fin group are spaced apart in the second direction, and the second ends gradually approach each other in the second direction while extending along the third direction.
3. A battery core structure according to claim 1 or 2, characterized in that: The two fin members of a single fin group form the two sides of an isosceles trapezoid.
4. A battery core structure according to claim 1 or 2, characterized in that: The two fin components of a single fin group form two waist sides of a right-angled trapezoid.
5. The battery cell structure according to claim 1, wherein: The fin structure is assembled on the first end surface and / or the second end surface.
6. The battery cell structure according to claim 1, characterized in that: The housing member is made of aluminum material.
7. A battery cell module, characterized in that: include: Multiple battery core structures, wherein the multiple battery core structures are stacked sequentially along a first direction, and aerogel is provided between adjacent battery core structures, and the battery core structure comprises: The battery cell body has a first end surface and a second end surface in a first direction; a shell member, assembled on the outside of the battery body, with the first end face and / or the second end face arranged in a first direction and at a distance from the shell member, and a gap formed between the first end face and / or the second end face and the shell member; A fin structure is arranged in the gap interval and assembled on the battery cell body. The fin structure includes multiple groups of fin groups continuously arranged along the second direction. A single group of fin groups includes two fin components arranged at intervals in the second direction, and a first open end and a second open end are formed at both ends in the third direction. The spacing between the two fin components in the single group of fin groups at the first open end position is greater than the spacing between the two fin components at the second open end position.
8. The battery cell module according to claim 7, characterized in that: The battery cell module further includes end plate components arranged at both ends in the first direction.
9. The battery cell module according to claim 8, characterized in that: The battery cell module further includes a cover plate component disposed at one end in the third direction, and the cover plate component is connected to the two end plate components in the first direction.
10. The battery cell module according to claim 9, characterized in that: The second open end is disposed adjacent to the end plate member in the third direction.