Bi-Cell Electrode Compensation for High-Pressure Battery Pressing
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Solution Overview
Problem
The manufacturing of all-solid-state batteries is hindered by dimension differences between negative and positive electrodes, which can cause damage during the high-pressure pressing process, and existing compensation methods are not efficient for mass production.
Innovation Solution
A method involving compensation members adhered to the electrodes to compensate for size differences, using a system with a reference surface and symmetrical side parts, allowing for precise adhesion and continuous feeding of compensation members to prevent damage and improve manufacturing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a high-pressure pressing process is used to firmly press electrode materials and electrolyte against each other, then the interface quality between electrodes and electrolyte is improved, but the electrodes may be damaged or broken
Solution Approach 1:
The patent applies preliminary action by pre-assembling the bi-cell structure with electrodes and electrolyte before the high-pressure pressing process. This preliminary assembly allows the components to be positioned and partially secured in advance, so that when pressing is applied, the interface quality is enhanced without causing electrode damage because the structure is already stabilized.
2Adaptability or versatility
If electrodes of different sizes are stacked to form a bi-cell, then the design flexibility is improved, but dimension differences may cause damage to the product during pressing
Solution Approach 1:
The patent explicitly embraces asymmetry by allowing electrodes of different sizes (different dimensions) to be stacked in the bi-cell structure. The design accepts and utilizes the dimensional differences between positive and negative electrodes rather than requiring symmetry, achieving design flexibility while maintaining product integrity through proper structural arrangement.
3Reliability
If compensation members are added to compensate for dimension differences between electrodes, then the alignment and prevention of damage is improved, but the manufacturing process complexity increases
Solution Approach 1:
The patent merges the compensation function into the overall bi-cell assembly process rather than treating it as a separate, complex operation. The compensation for dimension differences is integrated into the stacking and pressing operations, combining multiple functions (alignment, compensation, securing) into a unified manufacturing flow that reduces overall process complexity.
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
This method effectively prevents electrode damage and improves the quality of the battery by stabilizing the adhesion process and enhancing the alignment and fixing force between electrodes, thus ensuring better performance and productivity.
Implementation Method 1
adhering first compensation members to the first side part and the second side part simultaneously or at different times, and adhering second compensation members to the third side part and the fourth side part simultaneously or at different times
Data Source
AI summary
Disclosed is a method of manufacturing a bi-cell of a secondary battery. The bi-cell is configured such that, among electrodes of the bi-cell, a first electrode has a reference surface and is formed to have a designated thickness, a circumference of the reference surface is defined by at least four side parts, and, among the at least four side parts, a first side part and a second side part are symmetrical to each other with respect to a center of the reference surface, and a third side part and a fourth side part are symmetrical to each other with respect to the center of the reference surface, and the method includes adhering first compensation members to the first side part and the second side part simultaneously or at different times, and adhering second compensation members to the third side part and the fourth side part simultaneously or at different times.