Battery Module Current Collector Layout for Compact Assembly
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Solution Overview
Problem
Conventional electrical storage modules face challenges in achieving a compact configuration while maintaining handleability of current collecting plates due to the need to dispose positive and negative current collecting plates at intervals, which prevents integral formation.
Innovation Solution
The solution involves arranging current collecting foils side by side on an insulating substrate with an insulating sheet covering them, allowing for compact configuration and integral handling by fixing the foils to the sheet, enhancing productivity and insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If both the positive-electrode current collecting plate and the negative-electrode current collecting plate are disposed on one side in the height direction, then the electrical storage module can be compactly configured, but the current collecting plates cannot be integrally formed which deteriorates the handleability
Solution Approach 1:
The current collecting plates are segmented into multiple current collecting foils (first current collecting foil and second current collecting foil) that are disposed apart from each other on the insulating substrate. This segmentation allows the foils to be arranged on one side for compact configuration while maintaining individual handleability of each foil.
Solution Approach 2:
An insulating sheet is introduced as an intermediary carrier that holds multiple current collecting foils. The insulating sheet enables the foils to be handled together as an integrated assembly while maintaining the required spacing between positive and negative foils, thus improving handleability without compromising compactness.
2Ease of operation
If current collecting foils are arranged side by side on an insulating substrate with an insulating sheet covering them, then handleability is improved through integral handling, but the structure becomes more complex
Solution Approach 1:
Multiple current collecting foils are merged onto a single insulating substrate and covered by a common insulating sheet, forming an integrated current collecting member. This merging approach improves handleability by allowing all foils to be handled together while the modular design keeps the added complexity manageable.
Data Source
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AI summary
An electrical storage module includes an insulating substrate that opposes an electrical storage group including a plurality of electrical storage devices and includes a plurality of through-holes, a plurality of current collecting foils that are arranged side by side at intervals from each other on a first surface of the insulating substrate on a side opposite to a surface that opposes the electrical storage group, and an insulating sheet that is disposed to cover the plurality of current collecting foils. The plurality of current collecting foils include a first current collecting foil and a second current collecting foil that are adjacent to each other at an interval in a direction parallel to the first surface. The first current collecting foil includes a first lead part in a tongue shape that extends from an edge, is inserted into a hole of the insulating substrate, and is electrically connected to a positive electrode of a battery, and the second current collecting foil includes a second lead part in a tongue shape that extends from the edge, is inserted into the hole of the insulating substrate, and is electrically connected to a negative electrode of the battery.