Battery Cell Injection Hole Cap for Vacuum Filling and Gas Removal
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Solution Overview
Problem
Conventional battery cell manufacturing processes are complex and costly due to the difficulty in injecting electrolyte into the battery case and removing gases, requiring specialized facilities and limiting future management and productivity.
Innovation Solution
A battery cell design featuring an electrolyte injection hole with a detachable cap and an electrolyte injecting device that allows for easy injection and removal of electrolyte in a vacuum state, using a screwing mechanism and anti-slip grooves for user-friendly manipulation, enabling easy access and management of the electrolyte within the battery case.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery case is sealed in a vacuum chamber to inject electrolyte, then the electrolyte injection is effective, but the facility complexity increases and manufacturing cost increases
Solution Approach 1:
The battery case is divided into a sealed main body and a separate removable cap for the electrolyte injection hole. This segmentation allows the battery case to be sealed during manufacturing while enabling future access to the injection hole without breaking the main seal, thus maintaining injection effectiveness while simplifying future operations.
Solution Approach 2:
The electrolyte injection hole is pre-formed in the battery case during the initial sealing process in the vacuum chamber. This preliminary action eliminates the need for subsequent cutting and sealing operations, reducing facility complexity and manufacturing costs while ensuring effective electrolyte injection from the start.
2Object-generated harmful factors
If the battery case is cut and sealed again to remove gaseous products, then gas removal is effective, but the manufacturing process complexity increases
Solution Approach 1:
The electrolyte injection hole is pre-formed and sealed along with the battery case in the vacuum chamber before gas removal is needed. This allows gaseous products to be removed through the same hole without requiring additional cutting and sealing operations, thus eliminating process complexity while maintaining gas removal effectiveness.
3Reliability
If conventional sealing methods are used, then the battery case is hermetically sealed, but future electrolyte injection or gas removal becomes impossible
Solution Approach 1:
The battery case sealing is segmented into the main battery case seal and a separate seal for the electrolyte injection hole cap. This allows the main case to remain hermetically sealed while the injection hole cap can be removed for future electrolyte injection or gas removal operations, thus maintaining both sealing effectiveness and future management flexibility.
Data Source
AI summary
Disclosed is a battery cell, which includes an electrode assembly, a pair of electrode leads electrically connected to the electrode assembly, a battery case configured to accommodate the electrode assembly and expose a portion of the pair of electrode leads to the outside, an electrolyte injection hole formed in the battery case and connectable to an electrolyte injecting device that injects an electrolyte in a vacuum state so that the electrolyte is injected into the battery case, and an injection hole cap configured to cover the electrolyte injection hole and mounted to the electrolyte injection hole so as to be detachable from the electrolyte injection hole by user manipulation.