Battery Module Structure With Conductive Resin for Heat Dissipation
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Solution Overview
Problem
Lithium secondary battery modules and packs face challenges in cooling performance, leading to potential overheating, accelerated degradation, and increased risk of explosion or ignition, especially in high-temperature environments due to inadequate heat dissipation from stacked battery cells.
Innovation Solution
A battery module design featuring a battery cell stack with exposed lower sides, covered by a thermally conductive resin layer and an elastic member that surrounds the cell stack and sensing blocks, enhancing heat transfer and structural protection while guiding high-voltage and low-voltage connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If battery cells are stacked to increase capacity and output, then the energy density and power are improved, but heat dissipation becomes inadequate leading to overheating
Solution Approach 1:
The battery module divides the stacked battery cells into groups with cooling channels inserted between them. This segmentation allows heat from each group of cells to be dissipated through dedicated cooling channels, preventing heat accumulation while maintaining high capacity through cell stacking.
Solution Approach 2:
Cooling channels act as intermediary structures inserted between battery cell stacks. These channels facilitate heat transfer from the battery cells to the cooling fluid flowing through the channels, enabling effective heat dissipation without compromising the electrical connection and capacity benefits of cell stacking.
2Quantity of substance
If battery cells are closely stacked to increase capacity, then the space utilization is improved, but heat transfer paths become complicated reducing cooling efficiency
Solution Approach 1:
The patent merges the structural support function with the heat dissipation function by integrating cooling channels directly into the battery module structure. The cooling channels are positioned to receive heat from multiple cell stacks simultaneously, simplifying the heat transfer path while maintaining high cell density.
Solution Approach 2:
The cooling channels extend in the vertical direction between horizontally stacked battery cells, creating a three-dimensional heat dissipation structure. This dimensional approach allows heat to be transferred from multiple cell faces through a single cooling channel structure, reducing path complexity while maintaining high capacity.
3Temperature
If cooling channels are added to improve heat dissipation, then the cooling performance is improved, but the structural stability and vibration resistance may be compromised
Solution Approach 1:
The cooling channel structures are designed to perform multiple functions: heat dissipation, structural support, and vibration damping. The channels are integrated into the module structure to provide mechanical support while maintaining thermal management, thereby improving heat dissipation without compromising structural stability.
Solution Approach 2:
The battery module uses composite structures combining rigid support elements with thermal conductive materials in the cooling channels. This composite approach ensures both structural stability for vibration resistance and effective heat transfer for cooling performance.
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 simplifying heat transfer paths, prevents battery module deformation, and ensures effective heat dissipation, reducing the risk of overheating and extending battery lifespan.
Implementation Method 1
a thermally conductive resin layer positioned between the battery module and a bottom portion of the pack frame
Implementation Method 2
an elastic member that surrounds the cell stack and sensing blocks
Data Source
AI summary
A battery module and a battery pack including the same are provided. The battery module comprises a battery cell stack in which a plurality of battery cells including electrode leads are stacked; a first sensing block and a second sensing block configured to respectively cover a front side and a rear side of the battery cell stack from which the electrode leads protrude; and an elastic member configured to cover the first sensing block, the second sensing block, and two opposite lateral sides of the battery cell stack.