Battery Cell Assembly With Insulating Interlayers for Heat Propagation Control
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Solution Overview
Problem
Battery modules in electric vehicles face challenges with heat dissipation and cooling performance due to complex heat transfer paths, leading to electrical performance deterioration and potential ignition or explosion risks from heat generation during charging and discharging.
Innovation Solution
A battery cell assembly is designed with a heat insulating member, such as mica, ceramic wool, or aerogel, placed between battery cells to block heat propagation, along with a support member to enhance assembly efficiency and reduce the heat transfer path, thereby improving heat dissipation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a large number of battery cells are mounted in a battery module to increase capacity, then the energy density and power output are improved, but the heat transfer path becomes more complex and heat dissipation performance deteriorates
Solution Approach 1:
The patent divides the battery module into multiple battery cell assemblies, where each assembly contains a specific number of battery cells arranged in a structured configuration. This segmentation allows for better heat management by creating modular units with controlled heat transfer paths, resolving the contradiction between increasing cell quantity and maintaining heat dissipation performance.
2Device complexity
If battery cells are arranged closely to simplify module structure, then assembly efficiency is improved, but heat propagation between cells increases ignition risk
Solution Approach 1:
The patent introduces heat insulating members as intermediary elements positioned between adjacent battery cells within each assembly. These insulating members act as thermal barriers that prevent direct heat propagation between cells while maintaining the compact structured arrangement, thus resolving the contradiction between structural simplicity and heat isolation.
3Object-affected harmful factors
If heat insulating members are added between battery cells to block heat propagation, then ignition risk is reduced, but assembly complexity and manufacturing difficulty increase
Solution Approach 1:
The patent combines multiple functions into integrated components: the heat insulating members are positioned and secured within the structured assembly framework using the same fastening mechanisms that hold the battery cells themselves. This merging of functions reduces the number of separate assembly steps and maintains manufacturing efficiency while providing heat isolation.
4Productivity
If the battery module structure is simplified to improve assembly efficiency, then manufacturing time is reduced, but heat transfer path becomes complex and cooling performance deteriorates
Solution Approach 1:
The patent applies different thermal management strategies to different locations within the module: heat insulating members are strategically positioned between cells in specific orientations (e.g., along the width direction) where heat propagation is most critical, while maintaining open thermal pathways in other directions. This localized approach optimizes heat management without requiring complex overall structure.
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
The solution effectively reduces the risk of ignition and explosion by enhancing heat dissipation, maintaining electrical performance, and simplifying the assembly process while increasing the energy density and reducing module weight.
Implementation Method 1
a heat insulating member preventing heat propagation between the first battery cell and the second battery cell
Data Source
AI summary
A battery cell assembly includes a first battery cell, a second battery cell disposed to face the first battery cell, a protective member disposed between the first battery cell and the second battery cell, and a support member coupled to at least one side of the protective member and supporting the protective member. The protective member includes a heat insulating member preventing heat propagation between the first battery cell and the second battery cell.