Battery Cell Housing Interface for Direct Compression Strip Joining
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Solution Overview
Problem
Existing batteries experience loose assembly and stability issues due to loose connections between battery cells, leading to shaking and poor assembly quality.
Innovation Solution
A battery cell design featuring a housing with an insulating member that includes a hollow region and exposed region for direct connection with a compression strip, enhancing connection strength and stability without relying on indirect connections through the insulating member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the insulating member completely covers the housing outer surface, then insulation performance is improved, but connection strength between the battery cell and compression strip deteriorates
Solution Approach 1:
The insulating member is designed with different coverage characteristics in different regions: it completely covers the housing outer surface in most areas to provide insulation, but leaves the first wall partially exposed through the first hollow region to enable direct connection with the compression strip. This local differentiation resolves the contradiction between insulation performance and connection strength.
2Reliability
If the insulating member covers the first wall, then insulation performance is improved, but assembly quality deteriorates due to indirect connection
Solution Approach 1:
The insulating member is segmented to create the first hollow region, which divides the insulation structure into covered and exposed portions. This segmentation allows the first wall to be partially exposed for direct connection with the compression strip, improving assembly quality while maintaining insulation performance in other areas.
3Strength
If the connection area between the first wall and compression strip is increased, then connection strength is improved, but the insulating member coverage is reduced
Solution Approach 1:
The insulating member provides selective coverage: it completely insulates areas not requiring connection while leaving the first wall exposed in the first hollow region region to maximize connection area. This local quality differentiation allows the connection area to be increased without compromising overall insulation performance.
Data Source
AI summary
A battery cell includes a housing, an electrode assembly, and an insulating member. The housing includes a first wall. The electrode assembly is housed within the housing. The insulating member is covered on an outer side of the housing and covers an outer surface of the first wall that is away from the electrode assembly in a thickness direction of the first wall. The insulating member is further provided with a first hollow region; along the thickness direction of the first wall, the first hollow region is positioned on a side of the first wall that is away from the electrode assembly; the first wall forms a first exposed region at a position corresponding to the first hollow region; and the first exposed region is configured for connecting with a compression strip.