Power Storage Module Sealing for Detection Line Protection
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Solution Overview
Problem
The challenge in manufacturing power storage modules is the potential damage to detection lines during the resin filling process due to direct contact with the mold, which can occur when forming a resin layer to enhance sealability.
Innovation Solution
A method is employed where a resin component with hole portions is installed to accommodate the detection lines, allowing the formation of a filling resin layer without direct contact with the mold, and additional steps are taken to strengthen the fixation between the resin component and the sealing body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a resin layer is formed by directly holding the detection line with the mold during injection molding, then the sealability of the power storage cell is improved, but the detection line may be damaged
Solution Approach 1:
A resin component is introduced as an intermediary element between the mold and the detection line. The resin component has a lead-out portion that receives the detection line, and a hole portion through which the detection line passes. During injection molding, the mold holds the resin component rather than directly contacting the detection line, thus preventing damage while maintaining sealability. The resin component acts as a mediator that transfers the holding function from the mold to a dedicated structure designed for this purpose.
Solution Approach 2:
The resin component is prepared in advance with the lead-out portion and hole portion formed before the injection molding process. The detection line is positioned through the hole portion and received by the lead-out portion before the resin filling occurs. This preliminary preparation ensures that when the mold performs injection molding, the detection line is already protected and properly positioned, eliminating the need for direct mold-detection line contact.
2Reliability
If the wall thickness of the resin portion is increased to improve sealability, then the sealing performance is enhanced, but the complexity of the manufacturing process increases due to additional steps
Solution Approach 1:
The resin component and the sealing resin layer are merged into a single integrated structure. The resin component is positioned within the sealing body, and during injection molding, the resin material fills both the resin component and the surrounding sealing space simultaneously. This merging eliminates the need for separate manufacturing steps for the resin component and the sealing layer, reducing process complexity while achieving the desired wall thickness and sealability.
Solution Approach 2:
The resin component serves multiple functions: it provides structural support, guides the detection line through its hole portion, receives the detection line at its lead-out portion, and acts as part of the sealing structure. By making the resin component multi-functional, the invention reduces the number of separate components and steps needed, thereby simplifying the manufacturing process while maintaining enhanced sealability through increased wall thickness.
Data Source
AI summary
A method for manufacturing a power storage module includes preparing a stack, installing a resin component having a hole portion into which the detection line is inserted in the stack so as to form a gap with a lead-out portion of the detection line in the sealing body while facing the lead-out portion, and inserting a portion of the detection line led out from the lead-out portion into the hole portion of the resin component, and forming a filling resin layer integrated with the sealing body by filling a space between the lead-out portion and the resin component with a resin by using a mold, and obtaining a power storage module including the stack, the resin component, and the filling resin.