Battery Integrated Plate Raised Current Collector Alignment
Solution Overview
Problem
Existing battery manufacturing techniques fail to accurately align fragile end portions of electrode plates due to deformation caused by load during contact, leading to alignment failures in laminated-type batteries.
Innovation Solution
The method involves forming integrated plates with raised parts on current collecting foils, which are then overlapped to ensure precise alignment and connection, enhancing the rigidity of the plates and preventing deformation, and using slits to minimize distortion, allowing for accurate piling and terminal connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If end portions of electrode plates are brought into contact with a wall for alignment, then alignment position can be determined, but the fragile end portions are creased and deformed by the load applied
Solution Approach 1:
A rigid support structure (the raised part formed by bending the current collecting foil) is introduced as an intermediary between the electrode plate end portion and the alignment wall. This support structure bears the alignment load, preventing direct contact stress on the fragile end portions while maintaining alignment accuracy.
Solution Approach 2:
The current collecting foil is preliminarily bent to form a rigid support structure before the alignment process. This preliminary action creates a protective framework that prevents deformation during subsequent alignment operations, allowing the fragile end portions to remain intact while achieving precise positioning.
2Manufacturing precision
If the current collecting foil is made rigid to prevent deformation, then alignment accuracy improves, but the flexibility and ease of handling decreases
Solution Approach 1:
Only specific local regions of the current collecting foil are bent to form rigid support structures, while the rest of the foil maintains its original flexibility. This localized rigidification provides necessary structural support for alignment while preserving the overall ease of handling and processing of the electrode plate.
Solution Approach 2:
The current collecting foil is segmented into different functional regions: rigid support portions (bent sections) for structural stability and alignment, and flexible portions (unbent sections) for ease of handling and processing. This segmentation allows each region to perform its optimal function without compromising the other.
Data Source
AI summary
An integrated plate is configured with a positive electrode plate, a negative electrode plate, and a separator integrated in a card-like shape. The integrated plate comprising a storage part, a positive current collecting part, and a negative current collecting part is formed in an integrated plate manufacturing process. An electrode laminated body is manufactured in a piling process by piling a plurality of the integrated plates such that the storage parts, the positive and negative current collecting parts are overlapped together seen from upper position respectively The integrated plate manufacturing process includes a raising step of forming a raised part raised from other parts by partly bending or curving in at least a coinciding one of the positive current collecting part and the negative current collecting part for the plurality of the integrated plates, and the raised parts are overlapped one another seen from upper position in the piling process.