Battery manufacturing method and battery

Abstract

The invention relates to a battery manufacturing method and a battery. The battery manufacturing method at least includes the following steps: a battery cover cap is put into a sealing ring which is a thermal-shrinkage sealing ring, and the sealing ring is heated to shrink so as to wrap the cover cap. The battery comprises a shell body, a battery core roll and the cover cap; the battery core rollis arranged in the shell body, and the cover cap which is sealed at the opening end of the shell body is wrapped with the sealing ring. The battery is characterized in that the sealing ring is the thermal-shrinkage sealing ring and is heated to shrink so as to wrap the cover cap. The thermal-shrinkage sealing ring is heated before the sealing of the battery so as to wrap the cover cap and then the cover cap is put into the battery shell body for sealing, which can reduce the thickness of the cover cap and can reduce the height above a rolling trench of the battery shell body; as to the battery with the same height, the effective height of a battery pole piece can be increased; therefore, the battery manufacturing method is suitable for manufacturing the battery more higher capacity.

Description

technical field [0001] The present invention relates to a secondary battery, and more specifically, to a manufacturing method of the secondary battery and the battery. Background technique [0002] With the increasing popularity of digital products, the demand for supporting rechargeable secondary batteries is gradually increasing. Therefore, the requirement for the battery to be used in digital products after charging once is getting longer and longer, that is, the requirement for the capacity of the secondary battery is gradually increasing. However, the size of the battery case has been fixed, and how to increase the capacity in a limited space is currently the focus of the industry. [0003] Existing batteries, especially cylindrical batteries, are made with mechanical seals such as figure 1 , figure 2 First, put the sealing ring 3 and the cap 2 into the battery casing 1 after rolling grooves, and then seal the seal so that the sealing ring 3 surrounds the cap 2. In...

AI Technical Summary

Problems solved by technology

In this process, since the sealing ring 3 needs to be mechanically compressed, considering the fragility of the sealing ring 3, in order to prevent the sealing ring 3 from being sealed during the mechanical sealing process, it is necessary to thicken the chassis 21 of the cap 2 and increase the thickness of the sealing ring 3. The height of the large sealing ring 3 makes the height above the rolling groove 11 larger. When the height of the battery is fixed, the height below the rolling groove 11 is correspondingly smaller, which reduces the effective height of the electrode and makes it impossible to produce higher capacity. battery

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