Method for manufacturing secondary battery

Abstract

Provided is a method for manufacturing a secondary battery in which a resin material can be suitably formed at a predetermined portion of a terminal. A method for manufacturing a secondary battery includes a space forming step and an injection molding step. In the space forming step, the outer periphery of the quadrangular resin cutting part in the terminal is closed, so that a resin injection space is formed around the specified part of the terminal. In the injection molding step, the resin member is injection-molded at the terminal by injecting the resin into the injection space. The space forming step includes a fixed-size pressing step and a fixed-pressure pressing step. In the fixed-size pressing step, the distance between a pair of first outer peripheral surfaces is set to a predetermined distance by pressing between the pair of first outer peripheral surfaces extending parallel to each other among the four outer peripheral surfaces of the resin cut part. In the constant pressure pressing step, a pair of second outer peripheral surfaces extending in a direction intersecting with the pair of first outer peripheral surfaces among the four outer peripheral surfaces of the resin cutting part is pressed with a predetermined pressure.

Description

technical field [0001] The present disclosure relates to a method of manufacturing a secondary battery. Background technique [0002] Secondary batteries are widely used as portable power sources such as personal computers and mobile terminals, or as power sources for driving vehicles such as EVs (electric vehicles), HVs (hybrid vehicles), and PHVs (plug-in hybrid vehicles). In a secondary battery, a terminal for electrically connecting a power generating element housed inside a battery case to the outside is used. For example, in order to ensure insulation between the terminal and the battery case, etc., a resin member may be provided at a predetermined position of the terminal. [0003] As one method for providing a resin member at a predetermined position of a terminal, a method using injection molding is considered. Injection molding is a method of obtaining a molded article by injecting a heated and molten resin material into a mold and then cooling and solidifying th...

AI Technical Summary

Problems solved by technology

However, if the gap is filled with constant pressure in both the first direction and the second direction, a gap will be generated between the part pressed in the first direction and the part pressed in the second direction due to the influence of dimensional variation. , sometimes resin cutting cannot be performed properly

In addition, if simply pressing with a fixed dimension in both the first direction and the second direction, there is a possibility that the variation in size of the resin cut part cannot be absorbed, and excessive deformation, damage, etc. may occur in the resin cut part.

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