Battery Pack Cooling Structure with Integrated Duct Channels
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Solution Overview
Problem
Conventional battery packs face challenges in achieving uniform cooling of battery cells and electronic members due to limited coolant flow spaces, leading to differential pressure and inefficient heat removal, which can result in performance deterioration and safety issues.
Innovation Solution
A battery pack design with a coolant flow channel configured between a coolant introduction part and a discharge part, allowing coolant to circulate and cool both unit cells and electronic members, such as a battery management system, with adjustable inlet and outlet ports and a pack case structure that functions as a duct to enhance cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If coolant flow space is limited in conventional battery packs, then device complexity is reduced, but cooling efficiency deteriorates due to differential pressure and non-uniform coolant distribution
Solution Approach 1:
The coolant introduction part is divided into multiple introduction channels that extend along different sides of the battery module group. This segmentation allows coolant to be distributed more uniformly across multiple entry points, reducing differential pressure and improving cooling efficiency without significantly increasing overall device complexity
Solution Approach 2:
The coolant introduction part extends in the longitudinal direction along the sides of the battery module group rather than only in the transverse direction. This dimensional extension creates a more distributed coolant distribution pattern, improving cooling uniformity while maintaining a compact overall structure
2Reliability
If coolant flow channel is extended to improve cooling uniformity, then cooling efficiency is improved, but device complexity increases due to additional structural components
Solution Approach 1:
The coolant introduction part is integrated with the pack case to form a unified structure. The introduction part extends along the inner surface of the pack case, merging the cooling function with the structural housing, thereby improving cooling uniformity without adding separate complex components
Solution Approach 2:
The pack case serves dual functions: as the structural housing for the battery pack and as the coolant introduction part with integrated channels. This multi-functionality reduces the need for separate cooling system components, improving cooling efficiency while minimizing device complexity
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 improves cooling efficiency by ensuring uniform coolant distribution and heat removal, reducing pressure differences and enhancing the operational performance and safety of the battery pack.
Implementation Method 1
coolant introduced through the coolant inlet port cools the respective unit cells while passing through the respective unit cells
Implementation Method 2
some of the coolant having passed through the respective unit cells cools the electronic member in an eddy form
Data Source
AI summary
A battery pack including battery cells or unit modules (unit cells), configured to have a structure including a battery module group including one or more battery modules each having the unit cells mounted in a pack case in a state in which the unit cells are uprightly arranged in a width direction of the pack such that the unit cells are spaced apart by a spacing distance for coolant flow, a coolant introduction part continuously defined in a space between a bottom of the pack case and the battery module group, a coolant discharge part defined between a top of the pack case and the battery module group, an electronic member located at one side of the module group, the electronic member being mounted in an inner space defined by the coolant discharge part, and a coolant flow channel defined between the coolant introduction part and the coolant discharge part.