Lithium battery tab
By designing a roll-type continuous electrode ear with positive and negative electrode ears, the problems of low welding efficiency and large center distance tolerance of the existing lithium battery are solved, and efficient welding and smaller center distance tolerance are achieved.
Patent Information
- Application Number
- CN202421590912.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-05
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-05
AI Technical Summary
The positive and negative ears of existing lithium battery electrodes need to be carried out separately during the welding process, resulting in low welding efficiency and large center distance tolerances of the positive and negative ears, usually around ±1.5mm.
A lithium battery electrode ear is designed, in which the positive electrode metal belt is arranged parallel to the negative electrode metal belt, each electrode ear glue is evenly distributed along the length direction of the metal belt, and is arranged perpendicularly with the metal belt, the positive electrode metal belt is fixedly connected to one end of the electrode ear glue, and the negative electrode metal belt is fixedly connected to the other end of the electrode ear glue, forming a roll-type continuous electrode ear connected to the positive and negative electrode ear.
Through this design, the positive and negative electrode ear welding process of lithium battery ears can be completed in the same process, which improves welding efficiency and reduces the center distance tolerance of the positive and negative electrode ears, so that it is controlled within ±0.2mm, and improves the accuracy of the welding position.
Smart Images
Figure CN222927727U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium batteries, and particularly relates to a lithium battery tab. Background Art
[0002] The tab is a raw material for lithium ion polymer batteries (lithium batteries). For example, mobile phone batteries, Bluetooth batteries, notebook batteries, etc. used in daily life all require tabs. The tabs of lithium batteries are divided into positive and negative tabs. Generally, the positive tab is composed of an aluminum metal strip and tab glue, and the negative tab is composed of a nickel metal strip and tab glue. Currently, the positive and negative tabs are usually set as two separate independent individuals, resulting in the need to weld the tabs separately after the lamination is completed during the production of lithium batteries: for example, first weld the positive tab and then the negative tab; the welding efficiency of the above two different processes of the positive and negative tabs is low, and the tolerance of the center distance (the distance between the aluminum metal strip and the nickel metal strip) of the positive and negative tabs after welding is relatively large. Currently, the center distance tolerance of the positive and negative tabs is generally about ±1.5 mm. Summary of the Utility Model
[0003] (1) Technical Problems to be Solved
[0004] In view of the deficiencies of the prior art, the utility model provides a lithium battery tab, which can solve the above technical problems.
[0005] (2) Technical Solutions
[0006] To solve the above technical problems, the utility model provides the following technical solutions: a lithium battery tab, comprising: a positive tab metal strip, a negative tab metal strip, and a plurality of identical tab glues. The positive tab metal strip and the negative tab metal strip are arranged in parallel, and each tab glue is evenly spaced along the length direction of the positive tab metal strip and the negative tab metal strip. Each tab glue is perpendicular to the positive tab metal strip and the negative tab metal strip. The positive tab metal strip is fixedly connected to one end of each tab glue, and the negative tab metal strip is fixedly connected to the other end of each tab glue.
[0007] Preferably, the positive tab metal strip is an aluminum material metal strip.
[0008] Preferably, the negative tab metal strip is a nickel material metal strip or a copper plated nickel material metal strip.
[0009] Preferably, one end of the tab glue is provided with a first through hole, and the other end of the tab glue is provided with a second through hole. The positive tab metal strip passes through the first through hole to be fixedly connected to one end of the tab glue, and the negative tab metal strip passes through the second through hole to be fixedly connected to the other end of the tab glue.
[0010] Preferably, the positive tab metal strip and the first through hole are fixedly connected by hot pressing, and the negative tab metal strip and the second through hole are fixedly connected by hot pressing.
[0011] Preferably, the lithium battery tabs are collected into a roll by a material receiving tray.
[0012] (III) Advantageous Effects
[0013] Compared with the prior art, the present utility model provides a lithium battery tab, which has the following advantageous effects: the present utility model includes a positive tab metal strip, a negative tab metal strip, and a plurality of identical tab adhesives. Among them, the positive tab metal strip is fixedly connected to one end of each tab adhesive, and the negative tab metal strip is fixedly connected to the other end of each tab adhesive. That is, the lithium battery tab of the present utility model is a roll-type continuous tab with a positive tab and a negative tab connected together. The distance between the positive tab and the negative tab of the present utility model is fixed. When in use, the lithium battery tab of the present utility model can be cut into a plurality of positive and negative tab groups with the functions of positive and negative tabs and a fixed center distance between the positive and negative tabs (the distance between the positive tab metal strip and the negative tab metal strip). This positive and negative tab group structure enables the positive and negative tabs to be completed in the same process during welding. Compared with the prior art, the present utility model can improve the efficiency of the welding process of the positive and negative tabs of the lithium battery, and can reduce the center distance tolerance of the positive and negative tabs, so that the center distance tolerance of the positive and negative tabs is within ±0.2 mm, that is, improve the accuracy of the welding position of the positive and negative tabs. Description of the Drawings
[0014] Figure 1 is a perspective view of a lithium battery tab of the present utility model;
[0015] Figure 2 is a perspective view of a lithium battery tab of the present utility model and a material receiving tray;
[0016] Figure 3 is a perspective view of the tab adhesive of the present utility model;
[0017] Figure 4 is a front view of a positive and negative tab group obtained by cutting the lithium battery tab of the present utility model.
[0018] The reference numerals in the figure are: 1 positive tab metal strip, 2 negative tab metal strip, 3 tab adhesive, 4 first through hole, 5 second through hole, 6 material receiving tray, 7 positive welding end, 8 positive tab exposed end, 9 negative welding end, 10 negative tab exposed end. Detailed Embodiments
[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0020] The utility model provides a lithium battery tab, comprising: a positive tab metal strip 1, a negative tab metal strip 2 and a plurality of identical tab adhesives 3. The positive tab metal strip 1 and the negative tab metal strip 2 are arranged in parallel, and the tab adhesives 3 are evenly spaced along the length directions of the positive tab metal strip 1 and the negative tab metal strip 2. Each tab adhesive 3 is perpendicular to the positive tab metal strip 1 and the negative tab metal strip 2. One end of the positive tab metal strip 1 is fixedly connected to each tab adhesive 3, and the other end of the negative tab metal strip 2 is fixedly connected to each tab adhesive 3, that is, the same tab adhesive 3 is simultaneously connected to the positive tab metal strip 1 and the negative tab metal strip 2.
[0021] Preferably, the positive tab metal strip 1 is a metal strip made of aluminum (Al) material. The negative tab metal strip 2 is a metal strip made of nickel (Ni) material or a nickel-plated copper (Ni-Cu) material strip. In addition, the tab adhesive 3 can specifically be a single-layer modified PP (polypropylene) material used for conventional tabs or a 3-layer PP (heat-sealed PP / high-temperature blocking layer CPP / heat-sealed PP).
[0022] In this embodiment, a first through hole 4 is provided at one end of the tab adhesive 3, and a second through hole 5 is provided at the other end of the tab adhesive 3. The positive tab metal strip 1 passes through the first through hole 4 to be fixedly connected to one end of the tab adhesive 3, and the negative tab metal strip 2 passes through the second through hole 5 to be fixedly connected to the other end of the tab adhesive 3. Further, the positive tab metal strip 1 and the first through hole 4 are fixedly connected by hot pressing, and the negative tab metal strip 2 and the second through hole 5 are fixedly connected by hot pressing.
[0023] Specifically, the utility model includes a set of metal strips with fixed width and thickness. One of them is the above-mentioned aluminum material metal strip as the positive tab metal strip 1, and the other is a nickel material metal strip or a nickel-plated copper material metal strip as the negative tab metal strip 2. After the surfaces of the above two metal strips are subjected to nano-chemical treatment, they are jointly hot-pressed with a tab adhesive 3 of a certain width and thickness to obtain a roll-type continuous tab with positive and negative tabs connected together. The distance between the metal strips of the positive and negative tabs in the roll-type continuous tab is fixed. When in use, the utility model can be cut into a plurality of identical positive and negative tab groups with the functions of positive and negative tabs (that is, including both a positive tab and a negative tab) and a fixed tab center distance (referring to the distance between two different metal strips). When welding such positive and negative tab groups, the positive and negative tabs are completed in the same process. The utility model doubles the production efficiency of the tab welding process of laminated or full-tab wound polymer lithium batteries, and at the same time, the tolerance of the positive and negative tab center distance can be reduced to within ±0.2 mm.
[0024] Preferably, as Figure 2As shown, the battery tabs of the present utility model can be collected into a coil by a receiving tray 6. In addition, when welding the tabs is required, the battery tabs of the present utility model are cut into multiple positive and negative tab groups with the same positive and negative tab functions and a fixed center distance between the positive and negative tabs (the distance between the positive tab metal strip 1 and the negative tab metal strip 2), such as Figure 4 shown. Among them, the positive tab metal strip 1 includes a positive welding end 7 and a positive tab exposed end 8, and the negative tab metal strip 2 includes a negative welding end 9 and a negative tab exposed end 10. The above positive and negative tab groups enable the positive and negative tabs to be completed in the same process during welding, and at the same time, the center distance tolerance of the positive and negative tabs can be controlled within ±0.2 mm. The difference between the present utility model and the conventional tabs is that: for the conventional battery tabs, the positive tab and the negative tab are separate, and the conventional tab welding requires two different processes to complete, and the tab center distance tolerance is the sum of the tolerances of the two positive and negative processes. Currently, the tab tolerance is generally within ±1.5 mm. The battery tabs of the present utility model greatly improve the production efficiency and welding accuracy of the tab welding process for laminated or full-tab wound polymer lithium batteries.
[0025] It should be noted that the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.
[0026] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.
Claims
1. A lithium battery tab, characterized in that: include: A positive electrode ear metal strip, a negative electrode ear metal strip and a plurality of identical electrode ear glues, wherein the positive electrode ear metal strip and the negative electrode ear metal strip are arranged in parallel, and each of the electrode ear glues is evenly spaced along the length direction of the positive electrode ear metal strip and the negative electrode ear metal strip, and each of the electrode ear glues is arranged perpendicular to the positive electrode ear metal strip and the negative electrode ear metal strip, the positive electrode ear metal strip is fixedly connected to one end of each of the electrode ear glues, and the negative electrode ear metal strip is fixedly connected to the other end of each of the electrode ear glues.
2. The lithium battery tab according to claim 1, characterized in that: The positive electrode ear metal strip is an aluminum metal strip.
3. The lithium battery tab according to claim 1, characterized in that: The negative electrode ear metal strip is a nickel material metal strip or a copper-nickel-plated metal strip.
4. The lithium battery tab according to claim 1, characterized in that: A first through hole is provided at one end of the tab glue, and a second through hole is provided at the other end of the tab glue. The positive tab metal strip passes through the first through hole to be fixedly connected to one end of the tab glue, and the negative tab metal strip passes through the second through hole to be fixedly connected to the other end of the tab glue.
5. The lithium battery tab according to claim 4, characterized in that: The positive electrode tab metal strip and the first through hole are fixedly connected by hot pressing, and the negative electrode tab metal strip and the second through hole are fixedly connected by hot pressing.
6. The lithium battery tab according to claim 1, characterized in that: The lithium battery tabs are collected into coils through a receiving tray.