Battery Current Collector Support for Weld Stability
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Solution Overview
Problem
Secondary batteries face challenges in welding between the current collector plate and electrode terminal while preventing deformation of the current collector plate, which affects the stability and reliability of the battery.
Innovation Solution
A support member is introduced between the current collector plate and the cap assembly, comprising internal and external support parts with partition walls and connecting parts, to facilitate welding and prevent deformation by providing structural support and maintaining electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If welding is performed between the current collector plate and electrode terminal, then electrical connection is improved, but the current collector plate deforms
Solution Approach 1:
A support member is introduced as an intermediary component between the current collector plate and the cap assembly. This support member provides a stable mounting structure for the electrode terminal, allowing welding to be performed without the heat and mechanical stress directly affecting the current collector plate, thus preventing deformation while ensuring reliable electrical connection.
Solution Approach 2:
The support member is pre-installed on the current collector plate before the electrode terminal is attached. This preliminary action creates a stable base structure that prevents the current collector plate from deforming during the subsequent welding process, as the support member absorbs and distributes the thermal and mechanical stresses.
2Stability of the object's composition
If the current collector plate is made more rigid to prevent deformation, then structural stability is improved, but welding difficulty increases
Solution Approach 1:
The support member is divided into multiple segments including a first support part, a second support part, and a connecting part. This segmentation allows each component to be independently optimized - the first support part provides structural stability to the current collector plate, while the second support part facilitates easy welding of the electrode terminal, and the connecting part links these functions together.
Data Source
AI summary
A secondary battery includes: an electrode assembly including a first electrode tab protruding from one side thereof and a second electrode tab protruding from another side thereof; a case accommodating the electrode assembly; a first cap assembly including a first cap plate coupled to one side of the case, a first electrode terminal extending through the first cap plate, and a gasket between the first cap plate and the first electrode terminal; a first current collector plate including a tab connecting part and a terminal connector part protruding from the tab connecting part, the tab connecting part being electrically connected to the first electrode tab, the terminal connector part being electrically connected to the first electrode terminal; and a support member between the first cap plate and the first current collector plate.