Battery Module Heat Dissipation Layout for Temperature Uniformity
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Solution Overview
Problem
Existing battery modules generate excessive heat, leading to potential deterioration, ignition, and explosion due to inadequate heat dissipation, and exhibit significant temperature deviations among battery cells.
Innovation Solution
A battery module design featuring a heat dissipation structure with a cover plate and heat transfer materials arranged in specific grooves and rows to enhance heat dissipation, accompanied by insulating members and heat dissipation pads to manage temperature uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If battery capacity and output are increased, then power and energy storage improve, but heat generation increases and heat dissipation becomes inadequate
Solution Approach 1:
The heat dissipation member is divided into multiple functional components: a cover plate with first accommodation groove, second accommodation grooves, first heat transfer material, and second heat transfer material arranged in rows. This segmentation allows different regions to handle heat from different parts of the battery cell independently, improving overall heat dissipation efficiency for high-power batteries
Solution Approach 2:
The second heat transfer material is arranged in rows with varying intervals - narrower intervals at both ends of the battery cell and wider intervals at the center. This local quality adjustment matches the heat generation distribution (higher at ends, lower at center), optimizing heat dissipation for high-capacity, high-output batteries while managing the increased heat load
2Quantity of substance
If battery capacity is increased, then energy storage improves, but temperature deviation among battery cells increases
Solution Approach 1:
The heat dissipation structure implements local quality by positioning second heat transfer material rows at both ends of the battery cell where temperature deviation is typically higher, with narrower intervals to enhance cooling. The center region has wider intervals matching lower heat generation. This non-uniform distribution effectively reduces temperature deviation across the battery cell while supporting high capacity
Solution Approach 2:
The patent transitions from conventional single-layer heat dissipation to a multi-dimensional structure with the cover plate providing planar support, first accommodation groove for central heat management, and second accommodation grooves creating a row-based three-dimensional heat transfer network. This dimensional expansion enables more effective temperature uniformity control in high-capacity batteries
3Device complexity
If heat dissipation structure is simplified, then device complexity decreases, but heat dissipation performance becomes inadequate
Solution Approach 1:
The heat dissipation member merges multiple functions into a single integrated component: the cover plate provides structural closure, the first accommodation groove manages central heat, the second accommodation grooves with row-based heat transfer material handle end-region heat, and the insulating member prevents lateral heat loss. This merging achieves comprehensive heat dissipation without requiring multiple separate components
Solution Approach 2:
The heat dissipation member serves multiple functions simultaneously: structural support (cover plate), heat transfer (first and second heat transfer materials), thermal insulation (insulating member), and fluid channel provision (accommodation grooves). This multi-functionality delivers adequate heat dissipation performance while maintaining relatively simple device 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 design effectively dissipates heat and reduces temperature deviations across the battery module, enhancing safety and performance by preventing short circuits and improving overall thermal management.
Implementation Method 1
a heat dissipation body provided on one surface of the cover plate, on which the battery cell is supported, to dissipate heat generated in the battery cell
Data Source
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AI summary
The present invention relates to a battery module comprising: a plurality of battery cells disposed to overlap each other in a thickness direction thereof; a battery case configured to accommodate the battery cells and having a structure of which a lower portion is opened; and a heat dissipation member comprising a cover plate coupled to the lower portion of the battery case to support the battery cell and a heat dissipation body provided on one surface of the cover plate, on which the battery cell is supported, to dissipate heat generated in the battery cell, wherein the heat dissipation body comprises a first heat transfer material provided to be connected to a center of one surface of the cover plate in a longitudinal direction of the battery cell and a second heat transfer material provided on both portions of the first heat transfer material and having a structure aligned in a plurality of rows in the longitudinal direction of the battery cell, and the second heat transfer materials are aligned so that an interval therebetween is gradually narrowed from a center toward both ends of the battery cell to gradually improve heat dissipation performance from the center toward both the ends of the battery cell.