Battery Module Structure With Open-Bottom Thermal Contact Cooling
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Solution Overview
Problem
Conventional battery modules face challenges in effectively dissipating heat generated during charging and discharging, leading to potential battery deterioration and increased risk of explosion, especially in large-sized battery packs used in vehicles where heat dissipation is hindered by complex heat transfer paths and air gaps.
Innovation Solution
A battery module design featuring a battery cell stack covered by an elastic member with an open lower portion, a thermal conductive resin layer between the stack and a heat sink, and a refrigerant-delivering bolt for mounting and sealing, simplifying the heat transfer path and enhancing cooling performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a large number of battery cells are stacked to form a battery module, then capacity and output are improved, but heat dissipation becomes more difficult and temperature rises more quickly
Solution Approach 1:
The patent introduces cooling fins that extend in the vertical dimension above the battery cell stack, transforming the heat dissipation approach from horizontal/planar to three-dimensional. This increases the heat dissipation surface area without increasing the footprint area, allowing better heat management while maintaining high cell density for high output.
Solution Approach 2:
The patent introduces a heat transfer member as an intermediary component between the battery cell stack and the cooling system. This heat transfer member (with thermal conductivity ≥1 W/m·K) efficiently conducts heat from the battery cells to the cooling fins, resolving the heat accumulation problem in high-density stacks.
2Temperature
If conventional cooling systems with multiple components are used, then cooling capability is provided, but device complexity and number of parts increase
Solution Approach 1:
The patent merges the heat transfer member and cooling fins into an integrated cooling structure. The heat transfer member serves dual functions: as a thermal conduit from the battery cells and as a structural support for the cooling fins. This consolidation reduces the number of separate components while maintaining effective cooling capability.
Solution Approach 2:
The heat transfer member is designed to perform multiple functions simultaneously: heat conduction from battery cells, structural support for cooling fins, and direct thermal coupling with the battery stack. This multi-functionality reduces overall system complexity while achieving effective 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
The design improves cooling performance by directly transferring heat from the battery cells to the heat sink, reducing the risk of overheating and explosion, while also simplifying the structure and reducing the number of parts required.
Implementation Method 1
a thermal conductive resin layer located between the battery cell stack and the heat sink
Implementation Method 2
a heat sink located under the battery cell stack
Data Source
AI summary
A battery module includes a battery cell stack in which a plurality of battery cells including electrode leads are stacked; an elastic member for covering a front surface, rear surface and both side surfaces of the battery cell stack; a heat sink located under the battery cell stack; and a thermal conductive resin layer located between the battery cell stack and the heat sink, wherein the elastic member is opened in its lower portion, and a lower surface of the battery cell stack comes into contact with the thermal conductive resin layer.