Battery Module Heatsink Assembly for Pouch Cell Thermal Management
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Solution Overview
Problem
The increasing length of pouch-type secondary batteries leads to temperature deviations within the battery cell, with localized heating near the electrode lead, necessitating improved cooling solutions for battery modules and packs.
Innovation Solution
A battery module design featuring a bus bar assembly connected to the electrode lead and a heatsink assembly with thermal interface materials, where the heatsink assembly includes lower, upper, and side heatsinks with internal coolant flow paths to efficiently distribute heat and cool the battery cell and bus bar assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the total length of the pouch-type secondary battery is increased to increase energy capacity, then the energy density is improved, but the temperature deviation inside the battery cell increases and localized heating near the electrode lead occurs
Solution Approach 1:
The cooling system is segmented into multiple independent coolant flow paths: a first coolant flow path for cooling the electrode lead, and a second coolant flow path for cooling the battery cell. This segmentation allows targeted cooling of different heat-generating regions, effectively addressing temperature deviations while maintaining high energy capacity batteries.
2Quantity of substance
If the total length of the pouch-type secondary battery is increased to increase energy capacity, then the energy density is improved, but cooling performance deteriorates
Solution Approach 1:
The invention adds a spatial dimension to the cooling system by introducing a dedicated first coolant flow path that extends toward the electrode lead region. This dimensional extension of the cooling network ensures effective heat removal from both the battery cell and electrode lead, maintaining reliable cooling performance in high-capacity batteries with increased length.
3Device complexity
If a conventional cooling system is used for long batteries, then the structure is simple, but temperature uniformity deteriorates
Solution Approach 1:
The cooling system implements local quality by providing different cooling configurations for different regions: the electrode lead region receives cooling through the first coolant flow path, while the battery cell region receives cooling through the second coolant flow path. This localized cooling approach ensures temperature uniformity across the entire battery assembly without requiring overly complex system architecture.
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
This design effectively reduces temperature deviations by rapidly transferring heat from the electrode lead and bus bar to the heatsinks, enhancing cooling efficiency and preventing localized overheating, resulting in improved thermal management for battery modules and packs.
Implementation Method 1
a heatsink assembly provided to directly contact the at least one battery cell and the bus bar assembly while surrounding the at least one battery cell and the bus bar assembly
Implementation Method 2
the internal flow path allowing the coolant to flow therethrough
Data Source
AI summary
A battery module according to an embodiment of the present disclosure includes: at least one battery cell; a bus bar assembly connected to an electrode lead of the at least one battery cell and positioned on both side surfaces of the at least one battery cell; and a heatsink assembly positioned in direct contact with both of the at least one battery cell and the bus bar assembly while surrounding both of the at least one battery cell and the bus bar assembly.