Battery Cell Inner-Wall Insulation for Short-Circuit Prevention
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Solution Overview
Problem
Battery cells in BEVs face challenges in fast-charging capabilities due to electrical resistance in wires and limited storage capacity, necessitating careful system design and complex manufacturing processes.
Innovation Solution
A battery cell design featuring an isolating material applied to the inner wall to prevent short circuits, a variable height second current collector for temperature adaptation, and laser-welded connections to enhance electrical conductivity and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an isolating material is applied to the inner wall to prevent short circuits, then reliability is improved, but device complexity increases
Solution Approach 1:
The isolating material is applied to the inner wall before inserting the electrode assembly, preventing potential short circuits between the current collector and housing before they can occur. This preliminary protective action ensures reliability from the outset without requiring complex additional components.
Solution Approach 2:
The isolating material acts as an intermediary layer between the electrode assembly and the housing, providing electrical isolation and preventing direct contact that could cause short circuits. This mediator approach simplifies the overall design compared to more complex isolation mechanisms.
2Productivity
If multiple process steps are integrated into one, then productivity is improved, but manufacturing precision may worsen
Solution Approach 1:
The patent combines multiple manufacturing steps into integrated processes, such as applying isolating material to the housing and inserting the electrode assembly in a coordinated sequence. This merging increases productivity by reducing the number of separate operations while maintaining precision through careful process design.
Solution Approach 2:
The housing serves multiple functions: it provides structural support, electrical isolation through the applied material, and containment for the electrode assembly. This multi-functionality reduces the need for separate components and manufacturing steps, improving productivity without sacrificing precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improves charging performance, increases storage capacity, and reduces manufacturing steps by preventing short circuits and optimizing component arrangement.
Implementation Method 1
an isolating material electrically isolating the first current collector from the inner wall
Implementation Method 2
laser-welded connections to enhance electrical conductivity and efficiency
Data Source
Figure 1~2
Figure 3A~3B
Figure 4~5
AI summary
The disclosure relates to a battery cell (10) comprising a housing (20) having an inner wall (21), a first battery terminal (30) and a second battery terminal (40), the battery cell (10) further comprising an electrode assembly (11) with a first electrode (13) having a first current collector (14) being electrically connected to the first battery terminal (30) and a second electrode (15) having a second current collector (16) being electrically connected to the second battery terminal (40), the battery cell (10) comprising an isolating material (51) electrically isolating the first current collector (14) from the inner wall (21), the isolating material (51) being applied at least to a portion of the inner wall (21).