Winding type full-tab battery cell end structure
By locally kneading the full-pole ear at the end of the battery cell and fixing the flat-pole ears, the exposed un-buttoned flat-pole ears are formed, which solves the problem of slow infiltration of the electrolyte and improves the battery production efficiency.
Patent Information
- Application Number
- CN202420642517.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-01
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-04-01
AI Technical Summary
After smoothing the full-pole ears at the ends of the existing winding battery cell, the gap between the battery cell will be covered, resulting in slow infiltration of the electrolyte and affecting industrial production efficiency.
The entire pole ears are partially kneaded at the end of the battery cell, forming several flat pole ears and un-kneaded flat pole ears, and are fixed by welding and fixing them by collecting sheets. The un-kneaded ears are exposed so that the electrolyte solution can penetrate quickly.
Through the gaps of the unmistaked electrodes, the electrolyte can quickly penetrate into the battery cell, shortening the battery production time and improving working efficiency.
Smart Images
Figure CN222233815U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an end structure of a battery cell, in particular to a winding full-pole-ear battery cell end structure. Background Art
[0002] At present, the end of the wound battery cell in the battery usually adopts a full-ear structure, that is, after the battery cell is wound and formed, a full-ear will be reserved at the end of the battery cell, and then the full-ear will be flattened at the end of the battery cell by rotation or upsetting, and then a current collector is installed at the end of the battery cell, and the current collector and the full-ear are welded and fixed. At this time, the manufactured battery cell can be loaded into the battery shell for the electrolyte injection process; however, since the full-ear will directly fit the entire battery cell end after being flattened, that is, the flattened full-ear will cover the gap between the wound battery cells, at this time, the speed at which the electrolyte passes through the flattened full-ear and then penetrates into the battery cell will become very slow, which greatly affects the working efficiency of industrial production and manufacturing batteries. Utility Model Content
[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a wound full-ear battery cell end structure that can enable the electrolyte to quickly penetrate into the battery cell, shorten the industrial production time of the battery, and improve work efficiency.
[0004] The technical problem of the utility model is achieved through the following technical solutions:
[0005] A wound full-electrode-lug battery cell end structure comprises a battery cell, a full-electrode-lug reserved at the end of the battery cell and a current collecting sheet installed in conjunction with the end of the battery cell. The full-electrode-lug is partially flattened to form a plurality of flattened electrodes and a plurality of unflattened electrodes at the end of the battery cell. The plurality of flattened electrodes are welded and fixed to the current collecting sheet, and the plurality of unflattened electrodes are exposed relative to the current collecting sheet.
[0006] The plurality of unflattened tabs are higher than the plurality of flattened tabs.
[0007] The plurality of unflattened pole ears are exposed outside through corresponding small holes arranged on the current collecting sheet.
[0008] The current collecting sheet is fitted on the flattened pole ear, and the unflattened pole ear is raised and exposed from the outer side of the current collecting sheet.
[0009] The current collecting sheet is provided with a plurality of spring sheets, which are fixedly welded to the plurality of flattened pole ears.
[0010] The current collecting sheet is provided with a plurality of semi-circularly surrounded hollow holes, and a spring sheet is formed in the middle of each semi-circularly surrounded hollow hole.
[0011] The battery core is cylindrical, and a plurality of unflattened pole ears at the end of the battery core are evenly distributed in a radial circle with the cylindrical axis as the center.
[0012] Compared with the prior art, the utility model mainly flattens the whole pole ear reserved at the end of the battery cell partially, and then forms a plurality of flattened pole ears and a plurality of unflattened pole ears at the end of the battery cell, and welds and fixes the plurality of flattened pole ears to the current collecting sheet installed at the end of the battery cell, while the plurality of unflattened pole ears are exposed relative to the current collecting sheet; in this way, when the manufactured battery cell is loaded into the battery casing for the electrolyte injection process, the electrolyte can quickly penetrate into the battery cell through the gaps between the plurality of unflattened pole ears, thereby greatly shortening the industrial production time of the battery and effectively improving the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 The utility model is a schematic cross-sectional structure diagram of a cylindrical battery cell.
[0014] Figure 2 for Figure 1 Top view of the .
[0015] Figure 3 A cross-sectional view of a cylindrical battery cell.
[0016] Figure 4 for Figure 3 Top view of the .
[0017] Figure 5 for Figure 3 Stereoscopic diagram.
[0018] Figure 6 for Figure 1 Schematic diagram of the current collector structure used for the positive terminal.
[0019] Figure 7 for Figure 1 Schematic diagram of the current collector structure used for the negative terminal.
[0020] Figure 8 The utility model is a cross-sectional structural schematic diagram of a flat cylindrical battery cell.
[0021] Fig. 9 for Figure 8 Top view of the .
[0022] Fig.10 A cross-sectional view of a flat cylindrical battery cell.
[0023] Fig.11 for Fig.10 Top view of the .
[0024] Fig.12 for Fig.10 Stereoscopic diagram.
[0025] Fig.13 for Figure 8 Schematic diagram of the current collector structure used for the positive terminal.
[0026] Fig.14 The figure is a schematic diagram of the battery end structure to which the utility model is applied. DETAILED DESCRIPTION
[0027] The embodiments of the present invention will be described in detail below according to the above-mentioned drawings.
[0028] like Figure 1 to Figure 14 As shown, 1. battery cell, 11. flattened pole ear, 12. unflattened pole ear, 2. current collector, 21. perforation, 22. spring piece, 23. small hole.
[0029] A wound full-electrode-ear battery cell end structure, such as Figure 1 , Figure 8 As shown, the battery cell manufacturing structure belongs to a battery cell, which is mainly composed of a battery cell 1 and a current collector 2 installed at the end of the battery cell.
[0030] The battery cell 1 is manufactured by a winding process, and a full pole ear is reserved at the end of the wound battery cell. The full pole ear is then partially flattened by upsetting, so as to form a number of flattened pole ears 11 and a number of unflattened pole ears 12 at the end of the battery cell. The number of unflattened pole ears 12 needs to be higher than the number of flattened pole ears 11, and the number of flattened pole ears 11 are welded and fixed to the current collector 2 to form conductivity, and the number of unflattened pole ears 12 are exposed relative to the current collector 2.
[0031] At the same time, no matter what style the battery cell 1 adopts, it can be applied to this battery cell end structure. For example, the battery cell 1 of this embodiment adopts a cylindrical or flat cylindrical shape. Therefore, depending on the different battery cell shapes, its end structure and the current collector 2 installed at the end are also different.
[0032] Among them, the battery cell 1 is cylindrical in shape. Figure 1 to Figure 7 As shown, the current collector 2 is in the shape of a corresponding disc. At this time, a plurality of unflattened pole ears 12 at the end of the battery cell are evenly distributed in a radial circle with the cylindrical axis as the center, as shown in the embodiment of the present invention. Figure 3~Figure 5As shown, six unflattened pole ears 12 are arranged at the end of the battery cell, and are evenly distributed in a radial circle with the cylindrical axis as the center. Each unflattened pole ear is designed to be a long cylindrical shape, and of course it can be designed to be other shapes. The corresponding current collector 2 is also provided with six oblong small holes 23 evenly distributed in a radial circle. Therefore, when the disc-shaped current collector 2 is installed at the end of the cylindrical battery cell 1, the six unflattened pole ears 12 can be extended out of the six small holes 23 correspondingly arranged on the current collector 2, and the flattened pole ears 11 are welded and fixed to the current collector 2. The specific structure is as follows: a plurality of spring pieces 22 are provided on the current collecting sheet 2, and the number of the spring pieces usually corresponds to the number of the flattened pole ears 11 and is welded and fixed. For example, the end of the cylindrical battery cell in this embodiment is provided with six unflattened pole ears 12 which are evenly distributed in a radial circle, and the area formed between each two adjacent unflattened pole ears 12 is the flattened pole ears 11, so the number is exactly six. At this time, the number of spring pieces 22 is also designed to be six accordingly, and the six spring pieces 22 correspond to the positions of the six flattened pole ears 11 one by one and are welded and fixed.
[0033] The spring sheet 22 can be formed in a variety of ways, such as being directly welded to the current collecting sheet 2, or being directly provided with a plurality of semi-circular enclosed holes 21 on the current collecting sheet 2 as shown in this embodiment. Figure 6 , Figure 7 The "〕"-shaped perforations shown or Fig.13 As shown in the “C” shaped perforations, a spring piece 22 can be formed in the middle of each semi-circular perforation 21 .
[0034] The battery cell 1 is in the shape of a flat column. Figure 8~Figure 13 As shown, the current collecting sheet 2 is a rectangular sheet, which fits exactly on the flattened pole ear 11 and makes the unflattened pole ear 12 protrude from the outside of the current collecting sheet 2; moreover, the current collecting sheet 2 also adopts the same spring sheet structure to be welded and fixed with the flattened pole ear 11 that fits well, and the spring sheet 22 is usually designed to be in the middle of the current collecting sheet 2.
[0035] Of course, no matter whether the current collector 2 is round or rectangular, there is no restriction on the number and design position of the spring clips 22 thereon, and the two can be used interchangeably, as long as the current collector 2 installed at the end of the battery cell 1 can weld and fix the spring clip 22 to the flattened pole ear 11, and make the unflattened pole ear 12 exposed relative to the current collector 2. The welding and fixing of the spring clip 22 to the flattened pole ear 11 can be used to prevent the battery from being in a vibrating working condition, and the elasticity of the spring clip 22 can be used for buffering and offsetting, thereby effectively ensuring that the welding fixation between the current collector 2 and the flattened pole ear 11 will not fall off.
[0036] In addition, due to the different installation structures of the positive and negative terminals at both ends of the battery, the current collectors 2 installed at both ends of the battery cell 1 are also divided into positive current collectors and negative current collectors. However, the structures of the positive current collectors and negative current collectors are as follows: Figure 6 , Figure 7 and Fig.13 As shown, the design structure of the spring piece 22 is still the same.
[0037] The utility model creatively flattens the whole pole ears reserved at the end of the battery cell partially, and then forms a plurality of flattened pole ears 11 and a plurality of unflattened pole ears 12 at the end of the battery cell, and the plurality of flattened pole ears are welded and fixed to the current collecting sheet 2 installed at the end of the battery cell, while the plurality of unflattened pole ears 12 are exposed relative to the current collecting sheet 2; in this way, when the manufactured battery cell 1 is loaded into the battery casing for the electrolyte injection process, the electrolyte can quickly penetrate into the interior of the battery cell 1 through the gaps between the plurality of unflattened pole ears 12, thereby greatly shortening the industrial production time of the battery and effectively improving the work efficiency.
[0038] The above description is only a specific embodiment of the present invention. Those skilled in the art should understand that any structural design equivalent to this embodiment should be included in the protection scope of the present invention.
Claims
1. A wound full-electrode tab battery cell end structure, comprising a battery cell (1), a full-electrode tab reserved at the end of the battery cell, and a current collector (2) mounted in coordination with the end of the battery cell, characterized in that The full pole tabs are partially flattened to form a plurality of flattened pole tabs (11) and a plurality of unflattened pole tabs (12) at the end of the battery cell (1); the plurality of flattened pole tabs (11) are welded and fixed to the current collecting sheet (2), and the plurality of unflattened pole tabs (12) are exposed relative to the current collecting sheet (2).
2. A wound full-tab battery cell end structure according to claim 1, characterized in that The plurality of unflattened electrode tabs (12) are higher than the plurality of flattened electrode tabs (11).
3. A wound full-tab battery cell end structure according to claim 2, characterized in that The plurality of unflattened pole ears (12) extend outwardly from corresponding small holes (23) provided on the current collecting sheet (2).
4. The wound full-tab battery cell end structure according to claim 2, characterized in that The current collecting sheet (2) is fitted onto the flattened pole ear (11), and the unflattened pole ear (12) is raised and exposed from the outer side of the current collecting sheet (2).
5. The wound full-tab battery cell end structure according to claim 1, characterized in that The current collecting sheet (2) is provided with a plurality of spring sheets (22), and the plurality of spring sheets are fixedly welded to the plurality of flattened pole ears (11).
6. The wound full-tab battery cell end structure according to claim 5, characterized in that The current collecting sheet (2) is provided with a plurality of semi-annular enclosed hollow holes (21), and a spring sheet (22) is formed in the middle of each semi-annular enclosed hollow hole (21).
7. The wound full-tab battery cell end structure according to claim 1, characterized in that The battery core (1) is cylindrical, and a plurality of unflattened pole ears (12) at the end of the battery core (1) are evenly distributed in a radial circle with the cylindrical axis as the center.