Power storage device and method for manufacturing power storage device

By using an offset opening spacer design in large batteries, the problems of electrolyte injection difficulty and separator roll-up in large batteries are solved, and an efficient and reliable electrolyte injection process is achieved.

CN122158891APending Publication Date: 2026-06-05PRIME PLANET ENERGY & SOLUTIONS INC
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
PRIME PLANET ENERGY & SOLUTIONS INC
Filing Date
2025-12-04
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

In large batteries, the increased amount of electrolyte injected makes it more difficult to complete the electrolyte injection within a specified time, and the separator is prone to roll-up.

Method used

The design employs a spacer with multiple offset openings. By placing spacers inside the housing and utilizing the offset opening structure, the flow path of the electrolyte is controlled, diaphragm roll-up is prevented, and the amount of electrolyte injected is controlled during the injection process.

Benefits of technology

This effectively controls the amount of electrolyte injected per unit time, reduces the risk of diaphragm roll-up, and improves electrolyte injection efficiency and battery manufacturing reliability.

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Abstract

The present disclosure relates to a power storage device and a method for manufacturing a power storage device, and provides a technology capable of obtaining a power storage device in which a separator roll-up can be suppressed. A preferred mode of the manufacturing method disclosed herein includes a preparation step (S1) of preparing a battery assembly and a liquid injection step (S2) of injecting an electrolyte into the battery assembly. In the liquid injection step (S2), a sealing plate in which a liquid injection hole is formed is oriented upward and the battery assembly is placed, and an electrolyte is injected from a liquid injection port inserted into the liquid injection hole.
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