Battery Block Thermal Insulation for Uniform Cell Temperature
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Solution Overview
Problem
In battery blocks, the temperature of battery cells adjacent to end plates is lower due to heat absorption by cooling gas and end plates, leading to non-uniform temperature distribution, and there is a need to minimize air passageways to accommodate increased cell volume for capacity and voltage.
Innovation Solution
The battery block design includes first spacers with notches for cooling gas flow between cells and second spacers with thermal insulating properties to suppress heat transmission between cells and end plates, ensuring uniform temperature distribution while reducing the overall size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If end plates are used to secure battery cells, then the battery cells are held integrally from both sides, but the temperature of adjacent battery cells becomes lower than that of other battery cells due to heat absorption by end plates
Solution Approach 1:
A thermal insulating sheet is introduced as an intermediary layer between the end plates and the battery cells. This insulating sheet prevents direct thermal contact, blocking the heat absorption pathway from the battery cells to the end plates, thereby maintaining uniform temperature distribution across all battery cells while preserving the integral holding function of the end plates
2Quantity of substance
If battery cell volume is increased to ensure electricity storage capacity, then the number of cells can be reduced, but air passageways must be minimized which complicates cooling
Solution Approach 1:
The cooling system is designed with localized cooling channels positioned adjacent to each battery cell. This local quality approach allows each cell to have dedicated cooling pathways, enabling effective heat dissipation from larger volume cells without requiring complex global air passageway systems, thus maintaining cooling efficiency while accommodating increased cell capacity
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 configuration prevents temperature differences between cells, achieves uniform temperature, and decreases the battery block size, enhancing stability and lifespan.
Implementation Method 1
second spacers respectively disposed between the battery cells and each end plate and having a thermal insulating property for suppressing heat transmission between the battery cells and each end plate
Implementation Method 2
Gas for cooling the battery cells is passed through gaps formed between the battery cells and between the battery cells and the end plates. The gas absorbs heat from the battery cells, thereby cooling the battery cells
Data Source
AI summary
The present invention addresses the problem of obtaining a battery capable of achieving a uniform temperature among a plurality of battery cells in a simple configuration while achieving size and weight reductions, and a battery module using the battery block. The battery block of the present invention has a structure such that a pair of end plates is disposed at both ends of a plurality of battery cells in an arranged direction; first spacers are disposed between the plurality of battery cells; and second spacers are disposed between the battery cells and the end plates. The first spacers have a space for allowing a flow of cooling gas. The second spacers block the flow of the cooling gas between the battery cells and the end plates and have a thermal insulating property for suppressing heat transmission between the battery cells and the end plates.