A winding arc battery and its manufacturing method

Abstract

The invention discloses a winding type arc-shaped battery. The positive electrode tabs and the negative electrode tabs on the winding type arc-shaped battery are distributed on both sides of the fixing tape at the end of the winding sheet assembly, so as to avoid the process of winding the arc-shaped winding core. The middle fixing tape is bent and wraps the positive electrode lug and the negative electrode lug, and an arc-shaped winding core can be made by using automatic winding equipment, so as to improve the production efficiency; The method is to first wind the winding assembly into a winding core, then weld the positive and negative tabs on the sides of the positive and negative tabs respectively, and finally form an arc-shaped winding core by bending the winding core. It is formed at the end of the pole piece and then manually wound. This method can produce arc-shaped winding cores through automatic winding equipment, and ensure the accuracy of the positions of the positive and negative lugs, avoiding the installation positions of the positive and negative lugs. The deviation is large, resulting in poor packaging of the curved battery.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a winding arc battery and a manufacturing method thereof. Background technique [0002] With the development of science and technology, the types of batteries are becoming more and more abundant. In order to meet the needs of people's daily production and use, curved batteries have emerged as the times require. For example, arc-shaped batteries are used in wearable electronic products. In order to adapt to the complex interior of new electronic product casings, it is required that the shape of the battery can be profiled to reduce wasted internal space. [0003] However, at present, the tabs of the wound-type arc-shaped battery are welded and fixed at the tail of the pole piece and the length direction of the tab is consistent with the length direction of the pole piece. Therefore, this kind of curved battery cannot be wound by a winding machine, and can only be fi...

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Problems solved by technology

[0003] However, at present, the tabs of the wound-type arc-shaped battery are welded and fixed at the tail of the pole piece and the length direction of the tab is consistent with the length direction of the pole piece. Therefore, this kind of curved battery cannot be wound by a winding machine, and can only be fixed by sticking adhesive tape on the side of the core after winding by hand, so that Production efficiency is very low

In addition, since the size of the tab exposed to the winding core is affected by factors such as the length of the pole piece and the winding operation, the position of the tab is relatively large, and the tab is attached to the tab, which leads to the position of the tab The deviation is large, which makes it prone to poor packaging and liquid leakage when packaging arc-shaped batteries

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