Button Cell Housing Layout for Centered Electrolyte Injection
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Solution Overview
Problem
The manufacturing of button-type lithium-ion batteries faces challenges in reducing costs and improving production efficiency due to the need for precise angle correction during electrolyte injection and potential interference between the welding position of the sealing nail and the housing cover, complicating the processing and increasing costs.
Innovation Solution
The electrochemical apparatus features an injection opening at the center of the housing cover, allowing for mechanical positioning without visual angle correction, and positions the electrodes on the side surfaces, reducing the risk of remelting and processing difficulties by increasing the distance between the injection opening and the housing cover edge, thus simplifying the electrolyte injection process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the injection opening is positioned at the edge of the housing cover, then the cell structure can be compact, but the cell requires rotation for angle correction during electrolyte injection, reducing production efficiency
Solution Approach 1:
The injection opening is repositioned from the conventional edge location to the center of the housing cover, creating an asymmetric configuration that eliminates the need for rotation during injection. This central positioning allows the injection device to access the opening directly from above, simplifying the injection process and improving production efficiency without requiring angle correction or rotation operations
2Ease of manufacture
If the sealing nail welding position is close to the housing cover edge, then the cell structure is compact, but the welding position interferes with the housing cover welding edge, making processing more difficult
Solution Approach 1:
The sealing nail welding position is relocated from the conventional planar arrangement near the edge to a three-dimensional configuration where the sealing nail extends through the housing cover. This dimensional change allows the welding position to be separated from the housing cover welding edge in the vertical dimension, eliminating interference between the two welding operations and simplifying the manufacturing process
Data Source
AI summary
An electrochemical apparatus includes a housing, an electrode assembly, and an electrolyte, the electrode assembly and the electrolyte being disposed in the housing. The housing includes a housing body, a housing cover covering the housing body, and a sealing plug, where an injection opening is disposed at the center of the housing cover and the sealing plug is configured to seal the injection opening. The housing body includes a side wall. A first tab of the electrode assembly is electrically connected to the side wall. A second tab of the electrode assembly is electrically connected to a pole disposed on the side wall. The pole is insulated from the side wall.