Battery Module Resin Layer Layout for Uniform Cell Cooling
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Solution Overview
Problem
Conventional battery modules experience temperature and cooling deviations between battery cells due to uneven heat distribution, leading to voltage drops and limitations in the use of outer cells, particularly in low-temperature environments.
Innovation Solution
A battery module design featuring a first and second heat conductive resin layer on the housing, spaced apart and positioned adjacent to the front and rear surfaces of the battery cell stack, with varying distances and symmetrical shapes to improve heat distribution and reduce cooling deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a uniform heat conductive resin layer is applied to the entire bottom surface of the housing, then the cooling coverage is maximized, but the temperature deviation between central and outer battery cells increases due to uneven heat generation distribution
Solution Approach 1:
The patent applies different cooling strategies to different regions: the first heat conductive resin layer is applied at the front surface (end part) where heat generation is higher, while the second heat conductive resin layer is applied at the rear surface with different dimensions. This local differentiation addresses the uneven heat generation distribution across the battery cell stack, cooling the high-heat generation end parts more effectively while avoiding excessive cooling of the central region.
2Temperature
If the heat conductive resin layer is applied to the entire bottom surface, then cooling coverage is improved, but material usage and manufacturing complexity increase
Solution Approach 1:
The heat conductive resin layer is segmented into two distinct layers: the first heat conductive resin layer at the front surface and the second heat conductive resin layer at the rear surface. Each layer has specific dimensional requirements (the second layer has smaller length and width than the first layer). This segmentation allows for targeted cooling application, reducing unnecessary material usage while maintaining manufacturing simplicity through clear separation of application zones.
3Device complexity
If the heat conductive resin layer is applied uniformly, then the cooling structure is simple, but the voltage drop of outer battery cells becomes severe due to excessive cooling
Solution Approach 1:
The patent implements local quality by positioning the first heat conductive resin layer at the front surface where electrodes are located and the second heat conductive resin layer at the rear surface with reduced dimensions. This ensures that cooling is concentrated where heat generation is highest (end parts with electrodes), preventing excessive cooling of outer battery cells and the severe voltage drops that would result from uniform cooling application.
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 enhances uniform cooling, reduces voltage drops, and prevents non-uniform degradation of battery cells, increasing energy efficiency while minimizing material usage and manufacturing costs.
Implementation Method 1
a heat conductive resin layer is applied to a bottom surface for covering the lower part of the battery cell stack in the lower frame 30. The heat conductive resin layer 31 can cool the heat generated in the battery cell stack 12 by transferring the heat generated in the battery cell stack 12 to the outside of the battery module 10.
Data Source
AI summary
A battery module including: a battery cell stack including a plurality of battery cells; a housing for the battery cell stack; and a heat conductive resin layer formed on the bottom part of the housing. The heat conductive resin layer includes a first heat conductive resin layer and a second heat conductive resin layer. The first heat conductive resin layer is formed adjacent to the front surface of the battery cell stack, and the second heat conductive resin layer is formed adjacent to the rear surface of the battery cell stack, and at least a part of the first heat conductive resin layer and at least a part of the second heat conductive resin layer are spaced apart from each other.