Battery Cell Current Collector Layout for Stable Terminal Connection
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Solution Overview
Problem
Existing battery cells face reliability issues due to the risk of connection failure between the current collection member and the electrode terminal, particularly when the electrode assembly shakes, leading to deformation of the current collection member.
Innovation Solution
The battery cell design includes a current collection member arranged lateral to the electrode terminal, which abuts and is connected to the electrode terminal, limiting the current collection member's shake amplitude and reducing the risk of connection failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the current collection member is arranged lateral to the electrode terminal, then the reliability of connection is improved, but the device complexity increases
Solution Approach 1:
The current collection member is positioned laterally relative to the electrode terminal rather than directly below or above it, utilizing a different spatial dimension to achieve both connection stability and simplified structure. This lateral arrangement allows the current collection member to abut against the electrode terminal's sidewall, creating a stable mechanical connection that resists shaking while maintaining structural simplicity.
2Reliability
If the current collection member limits shaking amplitude, then connection failure risk is reduced, but the stress on the connection interface increases
Solution Approach 1:
The electrode terminal features a curved abutting surface that contacts the current collection member. This curved geometry distributes the limiting stress across a broader contact area rather than concentrating it at a single point, reducing peak stress while effectively limiting the shaking amplitude of the current collection member and preventing connection failure.
Data Source
AI summary
A battery cell includes a housing, an electrode terminal, an electrode assembly and a current collection member. The electrode terminal is disposed on the housing. The electrode assembly is accommodated in the housing, and an end of the electrode assembly facing towards the electrode terminal is provided with a first electrode tab. The current collection member is connected to the first electrode tab, and at least a part of the current collection member is located lateral to the electrode terminal towards the first electrode tab, abuts with and is connected to the electrode terminal.