Pouch Film Embossing Marks for Accurate Battery Cell Alignment
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Solution Overview
Problem
The existing pouch forming apparatuses face challenges in achieving high visual recognition rates due to irregularities in the formation of embossing parts, leading to difficulties in accurately seating the pouch film during the battery cell manufacturing process.
Innovation Solution
The method involves using an embossing punch part and a blank holder to form recessed parts on the pouch film, ensuring a flat bottom surface and clear circular shapes, which improves visual recognition and alignment during the pouch forming process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a piercing process is used to specify the position of the pouch film, then the position can be marked, but holes are formed in the pouch film causing intermittent piercing failures and requiring frequent adjustment of the piercing unit position
Solution Approach 1:
The invention extracts the positioning function from the piercing process. Instead of using holes created by piercing to mark position, the patent uses a separate positioning mark formed by embossing or printing on the pouch film. This separates the positioning function from the piercing operation, allowing the piercing unit to operate without being disrupted by hole formation issues.
Solution Approach 2:
The invention introduces a positioning mark as an intermediary element between the pouch film and the piercing unit. This positioning mark serves as a mediator that provides visual guidance for positioning without requiring physical holes in the pouch film. The marking unit creates this intermediary positioning reference that enables accurate positioning without the harmful effects of piercing-induced instability.
2Loss of information
If holes are formed in the pouch film by piercing, then position can be marked, but this causes intermittent piercing failures requiring adjustment of piercing unit position
Solution Approach 1:
The invention uses a copying approach by creating a visual representation (positioning mark) of the desired position on the pouch film. Instead of relying on physical holes that may fail to form, the system creates a graphical copy or representation of the position information through embossing or printing. This positioning mark serves as a visual guide that can be reliably detected without the physical integrity issues associated with hole formation.
3Manufacturing precision
If the pouch film is pressed with the pressing part inserted into the forming groove, then the electrode assembly-receiving part is formed, but the position specification becomes difficult without clear visual markers
Solution Approach 1:
The invention applies the principle of visual contrast changes by using embossing or printing to create positioning marks on the pouch film. These marks create visual contrast that makes position detection easier. The embossed or printed marks provide clear visual indicators that can be easily detected by detection systems, solving the difficulty of detecting and measuring pouch film position during the forming process.
Data Source
AI summary
A method of manufacturing a pouch type battery cell according to an embodiment of the present disclosure includes forming an embossing part in a part of a pouch film by using an embossing punch part. A pouch forming apparatus for forming a receiving part of the pouch film includes an embossing punch part, a die part serving as a passage through which the punch part moves, and a blank holder in contact with the embossing punch part in the die part.