Offset Electrode Battery Stack Layout for Uniform Cooling
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Solution Overview
Problem
Conventional battery assemblies face challenges in heat management as the performance of batteries improves, leading to significant issues with temperature differences and reduced power output.
Innovation Solution
A battery stack design that includes cells with varying positions and space occupancies of electrode bodies, featuring upward-offset, downward-offset, and middle-position cells, arranged to disperse heat generating regions and improve heat radiation performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If cells are arranged in a row with uniform electrode body positions, then the structure is simple and easy to manufacture, but heat management becomes difficult and temperature differences increase
Solution Approach 1:
The patent applies asymmetry by varying the electrode body positions within cells arranged in a row. Specifically, alternating cells have electrode bodies positioned at different locations (e.g., centered vs. offset), creating an asymmetric heat distribution pattern that promotes better heat management while maintaining overall structural simplicity
Solution Approach 2:
The patent implements local quality by giving different electrode body positions to different cells in the sequence. This local variation in electrode positioning creates zones with different thermal characteristics, allowing heat to be more effectively dissipated throughout the battery assembly rather than concentrating in uniform patterns
2Quantity of substance
If battery performance is improved with higher charging capacity, then energy storage increases, but heat generation issues become more significant
Solution Approach 1:
The patent applies segmentation by dividing the battery assembly into multiple cells with varying electrode positions. This segmentation creates distinct thermal zones that can be managed independently, allowing high-capacity batteries to be assembled while distributing heat generation across multiple segments rather than concentrating it
Solution Approach 2:
The patent implements parameter changes by varying the positional parameters of electrode bodies within cells. By changing the position parameter (centered vs. offset positions) while maintaining high charging capacity, the patent alters the thermal characteristics to reduce harmful heat generation effects
3Ease of manufacture
If electrode bodies are positioned uniformly in all cells, then manufacturing is simplified, but heat radiation performance deteriorates
Solution Approach 1:
The patent applies asymmetry by intentionally positioning electrode bodies differently in alternating cells. This asymmetric positioning creates varied heat radiation patterns that improve overall heat radiation efficiency while maintaining consistent manufacturing processes through standardized cell designs
Solution Approach 2:
The patent introduces positional variation as an additional dimension of control in cell arrangement. By varying electrode positions within the cell structure (rather than just changing cell configurations), the patent enhances heat radiation performance through a new degree of freedom in thermal management
Data Source
AI summary
A battery stack includes cells that are arranged in a row and bound together. Each of the cells includes a case and an electrode body accommodated in the case. The cells include multiple types of position variation cells, in which positions of electrode bodies of the cells are different from each other when the cells are viewed in an arrangement direction of the cells.