Sealed Battery Temporary Sealing for Gas Release and Inspection
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Solution Overview
Problem
The conventional method of manufacturing sealed batteries is inefficient due to the need for multiple steps to release gases generated during initial charging and introduce detection gases, leading to increased costs.
Innovation Solution
A method that involves temporarily sealing the battery case after pouring the electrolyte solution, performing an initial charge, introducing a detection gas through the temporarily sealed opening, and finally sealing the case, allowing for simultaneous release of initial charge gases and detection gas introduction without additional steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pouring hole is temporarily sealed before introducing helium gas, then gas generated during initial charge can be contained, but the number of steps increases and manufacturing efficiency decreases
Solution Approach 1:
The patent combines the gas release function and helium introduction function into a single integrated step. The pouring hole is temporarily sealed with a sealable member that can be opened to release gas, and then the same opening is used to introduce helium gas without requiring separate steps for gas release and helium introduction, thereby maintaining reliability while improving productivity
Solution Approach 2:
The temporarily sealed pouring hole serves multiple functions: it contains gas during initial charge, allows controlled gas release when opened, and serves as the introduction path for helium gas. This multi-functional use of the same opening and sealing mechanism eliminates the need for separate dedicated openings or steps for each function
2Reliability
If multiple steps are performed to release gas and introduce detection gas, then gas can be properly released and sealability can be inspected, but manufacturing cost increases
Solution Approach 1:
The patent merges multiple manufacturing steps into fewer integrated operations. The temporary sealing member allows the same opening to be used for both gas containment during charging and subsequent gas release and helium introduction, reducing the total number of steps and associated manufacturing costs while maintaining inspection reliability
Data Source
AI summary
Provided is a method of manufacturing a sealed battery, capable of releasing a gas generated during an initial charge without increasing the number of steps. The method of manufacturing the sealed battery including a battery case having an opening, and a power-generating element stored in the battery case, includes: a step of storing an electrode body in the battery case; a step of pouring an electrolyte solution into the battery case through the opening to turn the electrode body into the power-generating element; a step of temporarily sealing the opening with a temporary sealing member; a step of performing the initial charge of the power-generating element; a step of introducing a detection gas into the battery case through the opening while opening the temporarily sealed opening; and a step of finally sealing the opening with a final sealing member.