Battery Module Thermal Layout for Limiting Cell-to-Cell Heat Transfer
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Solution Overview
Problem
Existing battery modules fail to effectively inhibit the transfer of heat generated from one cell to an adjacent cell, necessitating further improvement in heat management.
Innovation Solution
A battery module design incorporating heat insulation members with a specific thermal resistance ratio to heat dissipation members, along with strategically positioned heat dissipation members and insulation layers, to manage heat transfer efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If heat insulation members are added between battery cells, then heat transfer between cells is reduced, but device complexity increases
Solution Approach 1:
The patent combines the heat insulation member and heat dissipation member into a single integrated component. The heat insulation member includes a heat dissipation portion that contacts the battery cell, and a heat insulation portion that extends toward the adjacent cell. This integration eliminates the need for separate heat insulation and heat dissipation components, reducing structural complexity while maintaining heat transfer inhibition functionality.
Solution Approach 2:
The heat insulation member is designed to perform multiple functions simultaneously: it provides thermal insulation to prevent heat transfer between cells, and its heat dissipation portion actively dissipates heat from the battery cell surface. This multi-functional design reduces the number of components needed while achieving both heat insulation and heat management objectives.
2Object-affected harmful factors
If heat insulation member thickness is increased, then heat transfer inhibition improves, but volume of battery module increases
Solution Approach 1:
The heat insulation member features non-uniform thickness distribution, with the thickness varying in the thickness direction. The heat insulation portion has different thickness characteristics compared to the heat dissipation portion, optimizing heat insulation performance where needed while minimizing overall volume. This localized quality variation allows effective heat transfer inhibition without uniformly increasing the component volume.
Solution Approach 2:
The patent specifies that the ratio of thermal resistance of the heat insulation member to thermal resistance of the battery cell should be within a specific range (0.0102 or higher). By controlling this parameter ratio rather than simply increasing insulation thickness, the design achieves effective heat transfer inhibition while optimizing the volume of the battery module.
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 design significantly reduces heat transfer to adjacent cells, maintaining lower temperatures and enhancing energy density while allowing for space savings.
Implementation Method 1
a ratio of the thermal resistance of the heat insulation member to the thermal resistance of the heat dissipation member (the thermal resistance of the heat insulation member/the thermal resistance of the heat dissipation member) is 0.0102 or higher
Implementation Method 2
first heat dissipation members are disposed respectively adjacent to the battery cells
Data Source
AI summary
A battery module, wherein: the battery module includes battery cells, a heat insulation member, and first heat dissipation members as heat dissipation members; the battery module includes, as the battery cells, at least a first battery cell and a second battery cell; the first heat dissipation members are disposed respectively adjacent to the battery cells; the heat insulation member is disposed between the first battery cell and the second battery cell; and a ratio of the thermal resistance of the heat insulation member to the thermal resistance of the heat dissipation member (the thermal resistance of the heat insulation member/the thermal resistance of the heat dissipation member) is 0.0102 or higher.