Battery Cell Cap Plate Magnetic Alignment for High-Speed Sealing
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Solution Overview
Problem
Secondary battery cells face issues with cap plate misalignment due to vibrations and increased defect rates during high-speed manufacturing processes, which can lead to defects such as defects in the sealing force between the cell case and the cap plate.
Innovation Solution
Incorporation of a magnetic field to the cap plate and the magnetic force to the cap plate and the sealing force between the cell case and the cap plate, using a magnetic member to the sealing force between the cell case and the cap plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the process velocity is increased to increase productivity, then productivity is improved, but misalignment of the cap plate occurs more easily and defect rate increases
Solution Approach 1:
The magnetic member is installed on the cell case beforehand, creating a magnetic field that will automatically guide and align the cap plate during the coupling process. This preliminary preparation ensures that even at high speeds, the cap plate is drawn into correct alignment by the magnetic force, preventing misalignment defects while maintaining high productivity.
2Productivity
If vibrations occur during cap plate accommodation, then productivity is maintained, but the cap plate easily deviates from aligned position and defect rate increases
Solution Approach 1:
The magnetic force generated by the magnetic member converts the harmful effect of vibrations into a beneficial alignment mechanism. During vibrations, the magnetic attraction continuously pulls the cap plate back toward the aligned position, ensuring stability despite mechanical disturbances. This allows vibrations to occur during operation without compromising alignment quality.
3Strength
If the coupling force between cap plate and cell case is increased to improve sealing force, then sealing force is improved, but the complexity of the coupling mechanism increases
Solution Approach 1:
The patent replaces part of the mechanical coupling system with a magnetic coupling system. The magnetic member generates magnetic force that acts as an additional coupling mechanism, enhancing the sealing force without requiring complex mechanical features. This substitution simplifies the overall coupling mechanism while improving sealing performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The magnetic member maintains the cap plate in an aligned position, reducing misalignment and defect rates, enhancing coupling and sealing forces, and improving manufacturing productivity.
Implementation Method 1
a magnetic member providing magnetic force to the cap plate so that the cap plate may maintain an aligned position with respect to the cell case
Data Source
AI summary
The present disclosure provides battery cell including: an electrode assembly; a cell case in which an accommodation space for accommodating the electrode assembly is formed and one side thereof is open and; a cap plate covering an open portion of the cell case and coupled to the cell case; and a magnetic member providing magnetic force to the cap plate so that the cap plate may maintain an aligned position with respect to the cell case, wherein the magnetic member is disposed on at least one of the electrode assembly, the cell case or the cap plate.