Battery Terminal Layout for Higher Capacity Density
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Solution Overview
Problem
Existing batteries have a reduced capacity density due to the large space occupied by the pole, insulating member, and other components, which decreases the volume of the battery cell and overall battery capacity.
Innovation Solution
The battery design incorporates a housing with a notch for an insulating member, which has a mounting hole for a connecting sheet with a protruding part. This arrangement allows the insulating member and connecting sheet to occupy a minimal internal space, maximizing the space for the battery cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional pole and insulating member structures are used, then electrical connection and insulation functions are achieved, but battery capacity density is reduced due to large space occupation
Solution Approach 1:
The insulating member and connecting sheet are merged into a single integrated component. The insulating member includes a receiving cavity that accommodates the connecting sheet, eliminating the need for separate pole structures. This integration significantly reduces the space occupied by electrical connection components while maintaining both insulation and electrical connection functions, thereby improving battery capacity density.
Solution Approach 2:
The connecting sheet is nested within the receiving cavity of the insulating member. This nested arrangement allows the connecting sheet to be housed inside the insulating member structure, minimizing the overall volume required for electrical connection components and maximizing the space available for the battery cell.
2Reliability
If larger insulating member is used for better insulation, then insulation performance is improved, but battery cell volume is reduced
Solution Approach 1:
The insulating member is designed with non-uniform thickness, featuring a thicker first insulating wall at the connection point where insulation is most critical, and a thinner second insulating wall at the opposite end. This local quality variation provides enhanced insulation performance at the critical connection interface while minimizing the overall volume of the insulating member, thereby preserving battery cell volume.
Solution Approach 2:
The insulating member and connecting sheet are combined into a single integrated structure, eliminating the need for separate insulating components. This merger reduces the total volume required for insulation while maintaining effective insulation performance through the optimized wall thickness distribution in the integrated structure.
Data Source
AI summary
A battery and an electronic device. The battery includes a battery cell, a housing, an insulating member and a connecting sheet, where the housing is provided with an accommodating cavity, and the battery cell is disposed in the accommodating cavity; a side wall of the housing is provided with a notch, the insulating member is mounted at the notch, and the insulating member is provided with a mounting hole; the connecting sheet is disposed on the insulating member and is provided with a protruding part, the protruding part penetrates through the mounting hole and extends to inside of the housing, and the protruding part is electrically connected with a tab assembly of the battery cell. The electronic device includes the battery. Capacity density of the battery is improved without changing the size of the battery.