Winding type arc-shaped battery and manufacturing method thereof

Abstract

The invention discloses a winding type arc-shaped battery. The positive and positive lugs of the winding type arc-shaped battery are distributed at the two sides of a fixed adhesive tape at the tail end of a roll sheet assembly, and the fixed adhesive tape is prevented from being bent and wrapping the positive and negative lugs in the arc-shaped roll core winding process. Moreover, an arc-shaped roll core can be manufactured through automatic winding equipment, thereby improving the production efficiency. The invention further discloses a manufacturing method for manufacturing the winding typearc-shaped battery. The manufacturing method comprises the following steps: firstly, winding the roll sheet assembly into a roll core; respectively welding the positive lug and the negative lug on the side parts of a positive electrode plate and a negative electrode plate; finally, winding an arc-shaped roll core to form the roll core. Compared with a traditional mode that a lug is formed at thetail end of a pole piece and then is manually wound, the method has the advantages that the arc-shaped roll core can be produced through the automatic winding equipment, the position accuracy of the positive and negative lugs is ensured, and the arc-shaped battery is prevented from being poorly packaged due to the fact that the deviation of the mounting positions of the positive and negative lugsis large.

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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