Current Collecting Foil Layout for Compact Electrical Storage Modules
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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 for separate disposition of positive and negative current collecting plates, which hinders integrated formation.
Innovation Solution
The electrical storage module employs a current collecting member with an insulating substrate and insulating sheet covering current collecting foils, allowing them to be arranged side by side and fixed integrally, enhancing handleability and compactness.
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 handleability
Solution Approach 1:
The current collecting member is segmented into multiple current collecting foils (positive and negative electrodes) that are arranged side by side on the insulating substrate. This segmentation allows each foil to be electrically independent while being mechanically integrated through the common insulating substrate and insulating sheet, resolving the contradiction between compact configuration and handleability.
Solution Approach 2:
Multiple current collecting foils are merged into a single integrated structure by mounting them on a common insulating substrate and covering them with a single insulating sheet. This merging provides integral formation and improved handleability while maintaining the compact one-sided configuration, as all foils are disposed on the same side of the electrical storage group.
2Volume of moving object
If multiple current collecting foils are arranged side by side on one surface of the insulating substrate, then compact configuration is achieved, but insulation between adjacent foils becomes critical
Solution Approach 1:
The insulating sheet acts as an intermediary layer that covers and electrically insulates adjacent current collecting foils from each other. This intermediary insulation layer ensures reliable electrical isolation between the positive and negative electrode foils while allowing them to be arranged side by side in the compact configuration.
Solution Approach 2:
The current collecting member uses a composite structure combining the insulating substrate and insulating sheet as insulating materials, with conductive current collecting foils. This composite material approach provides both mechanical support and electrical insulation, enabling compact arrangement while maintaining insulation reliability.
Data Source
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.