Conductive Lid Structure for Current Collector End Constraint
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Solution Overview
Problem
Existing electrical storage devices face challenges in suitably constraining the end part of the current collector, which affects the device's performance and integrity.
Innovation Solution
The electrical storage device incorporates a conductive member disposed between the lid and the electrode assembly, with a recessed portion in the lid to house the conductive member, and a clamping portion to secure the current collector, enhancing the constraint of the end part.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the end part of the current collector is not adequately constrained, then the device structure is simpler, but the reliability and performance are insufficient
Solution Approach 1:
The conductive member is nested within the lid, with the lid containing a recessed portion that houses the conductive member. This nested configuration allows the conductive member to be integrated into the lid structure, providing constraint functionality while maintaining a compact overall design and avoiding excessive structural complexity.
Solution Approach 2:
The conductive member acts as an intermediary component between the lid and the current collector end part. It provides a dedicated constraint mechanism that improves reliability while keeping the lid structure relatively simple through the use of a separate, specialized component.
2Reliability
If a conductive member is added to constrain the current collector, then the constraint capability is improved, but the device complexity increases
Solution Approach 1:
The conductive member serves multiple functions: it provides electrical conductivity, constrains the current collector end part, and is housed within the lid structure. This multi-functionality reduces the need for separate constraint components, thereby limiting the increase in device complexity while improving constraint capability.
Solution Approach 2:
The conductive member is nested within the lid's recessed portion, which integrates the constraint function into the existing lid structure rather than adding a completely separate external component. This nesting approach minimizes the increase in overall device complexity.
3Stability of the object's composition
If the lid includes a recessed portion to house the conductive member, then the constraint stability is improved, but the manufacturing complexity increases
Solution Approach 1:
The recessed portion is pre-formed in the lid structure before final assembly, providing a predetermined housing for the conductive member. This preliminary formation of the recessed portion ensures stable positioning of the conductive member while allowing the lid to be manufactured as a single integrated component, thereby limiting the increase in manufacturing complexity.
Data Source
Figure 1A~1B
Figure 2~3
Figure 4
AI summary
The present invention is provided with: an electrode body that includes a current collector; an exterior film that wraps the electrode body; a lid body that is formed from a metal material and seals the electrode body together with the exterior film; and a conductive member that is connected to the lid body and the current collector. The conductive member is disposed between the lid body and the electrode body.