Battery Cell Cover With Integrated Terminals and Venting
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Solution Overview
Problem
Existing battery cell assembly methods require additional interconnection elements, leading to increased production time, limited spatial integration, and potential damage to current collectors due to stress, which complicates integration in vehicles.
Innovation Solution
A battery cell cover design with integrated terminal accommodations and ventilation vents, allowing for simplified assembly and reduced spatial footprint without additional interconnection elements, using covers with through-holes for terminal fixation and ventilation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If interconnection elements are used to connect cell terminals, then electrical connection between cells is achieved, but production time increases and assembly complexity increases
Solution Approach 1:
The patent merges the functions of the end wall, terminal mounting, and interconnection into a single integrated cover structure. The cover directly receives cell terminals through integrated through-holes and provides electrical connection without requiring separate interconnection elements, thereby reducing assembly steps and production time while maintaining reliable electrical connection.
2Reliability
If interconnection elements are used to connect cell terminals, then electrical connection between cells is achieved, but device complexity increases
Solution Approach 1:
The cover integrates multiple functions: it serves as the end wall closure, provides terminal mounting through built-in through-holes, and establishes electrical connections directly. This consolidation eliminates the need for separate interconnection elements and reduces the number of assembly operations required, thereby simplifying the overall device complexity.
3Volume of moving object
If current collectors are folded to fit in the cell, then spatial integration is improved, but the current collectors become damaged or torn
Solution Approach 1:
The patent extracts the current collectors from the folded configuration and positions them to extend directly from the electrode stacks to the terminals through the cover's through-holes. This eliminates the need for folding, thereby maintaining the full strength and integrity of the current collectors while achieving efficient spatial integration within the cell structure.
4Ease of manufacture
If additional volume is provided for current collectors, then current collector integration is achieved, but the spatial footprint of the cell increases
Solution Approach 1:
The cover structure merges the functions of end wall closure and current collector routing. The through-holes in the cover provide direct pathways for current collectors to reach the terminals, eliminating the need for additional internal volume dedicated to current collector accommodation. This maintains a compact spatial footprint while facilitating easy current collector integration.
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
The invention relates to a cover (21) for a battery cell (10) of the type comprising a cup (20) closed by at least one cover (21), the cover (21) being characterized in that it comprises: an end wall (211); and at least two side walls (213A, 213B) extending parallel to each other and parallel to a reference axis (X1) of the cover (21) from the end wall (211) to a connecting rim (212) having a closed contour and delimiting an opening (212') intended to be connected to the cup (20) of the cell (10), the cover (21) being characterized in that the end wall (211) and the side walls (213A, 213B) together delimit an interior space (321), a first (213A) of the two side walls (213A, 213B) of the cover (21) comprising a main through-orifice (111) configured to accommodate a terminal (11) of the cell (10).