Battery Cell Cap Plate Layout for Shorter Heat Dissipation Paths
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Solution Overview
Problem
Existing secondary batteries face challenges in effectively dissipating heat and maintaining stability due to inefficient heat management, which can lead to performance issues and safety concerns.
Innovation Solution
The battery cell design incorporates a non-polar region with an insulating material at the center, separated from a polar region, and includes a current collector with specific plate configurations to enhance heat dissipation and stability by controlling the path of heat movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the current collector is disposed close to the electrode assembly for compact design, then the device complexity is reduced, but the heat dissipation efficiency deteriorates due to longer heat movement distance
Solution Approach 1:
The cap plate is segmented into a polar region and a non-polar region, with the non-polar region positioned at the center to create a dedicated heat dissipation pathway. This segmentation allows heat to travel a shorter distance through the non-polar region while maintaining structural integrity and electrical isolation.
Solution Approach 2:
An insulating material is introduced as an intermediary between the polar and non-polar regions of the cap plate. This intermediary electrically isolates the non-polar region while allowing thermal conduction, enabling efficient heat dissipation without compromising electrical safety or increasing structural complexity.
2Temperature
If the non-polar region is positioned at the center with insulating material for optimized heat dissipation, then the heat dissipation efficiency is improved, but the device complexity increases due to additional structural components
Solution Approach 1:
The non-polar region of the cap plate serves multiple functions: it acts as a heat dissipation pathway, provides electrical isolation through the insulating material, and maintains the structural integrity of the battery cell. This multi-functionality reduces the need for additional dedicated components.
Solution Approach 2:
The insulating material is integrated directly into the non-polar region of the cap plate, merging the electrical isolation function with the heat dissipation structure. This integration eliminates the need for separate insulating components while achieving both thermal and electrical management goals.
3Reliability
If the current collector contacts both polar and non-polar regions for electrical connectivity, then the electrical conductivity is improved, but the stability deteriorates due to potential short circuits and safety issues
Solution Approach 1:
The insulating material positioned between the polar and non-polar regions acts as an intermediary that prevents direct electrical contact while allowing thermal interaction. This ensures electrical stability by preventing short circuits while maintaining the necessary thermal conduction pathways for heat dissipation.
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
This design effectively shortens the distance heat travels and improves stability by optimizing heat dissipation, enhancing the performance and safety of the battery cell.
Implementation Method 1
the non-polar region may include an insulating material that electrically separates it from the polar region
Implementation Method 2
the current collector may be in contact with the polar region of the cap plate... the distance over which the heat moves may be shortened, the dissipation of the heat may be effectively controlled
Data Source
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AI summary
A battery cell of the present disclosure includes an electrode assembly in which an electrode including a flag and a separator are wound, a can accommodating the electrode assembly, a cap plate sealing the can, and a current collector disposed between the cap plate and the electrode assembly and in contact with the flag, the can, and the cap plate, respectively.