Battery Pack Housing Flow Channels for Tab Cooling Uniformity
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Solution Overview
Problem
Existing battery pack cooling methods are inefficient in maintaining proper temperature and reducing temperature deviations between cells, leading to potential fires, performance degradation, and reduced battery lifetime due to inadequate consideration of heat generation and fluid flow dynamics.
Innovation Solution
A battery pack housing design with protruding portions and groove portions that increase the flow rate and velocity of the cooling fluid around high-heat generating electrode tabs, along with strategically placed fluid inlets and outlets, enhances turbulence and circulation of the cooling fluid to effectively manage heat distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cooling methods are used with simple fluid injection and discharge, then the cooling system structure is simple, but the cooling efficiency is insufficient and temperature deviations between cells cannot be effectively reduced
Solution Approach 1:
The housing incorporates localized protruding portions that create concentrated cooling channels around the electrode tabs where heat generation is highest. This local structural modification directs cooling fluid flow precisely to the hottest areas without requiring complete redesign of the entire housing structure, thereby improving cooling efficiency while maintaining overall structural simplicity
Solution Approach 2:
The cooling system is segmented into multiple independent cooling channels formed by the protruding portions, allowing different regions of the battery pack to be cooled independently. This segmentation enables targeted cooling of high-heat areas while using a relatively simple overall housing design
2Temperature
If cooling fluid flow rate is increased to improve cooling efficiency, then temperature control improves, but fluid consumption and system energy requirements increase
Solution Approach 1:
The protruding portions create localized high-velocity flow regions around the electrode tabs, concentrating cooling effort where it is most needed. This allows effective temperature control with lower overall fluid consumption compared to uniform cooling approaches that would require higher flow rates throughout the entire system
Solution Approach 2:
The housing structure promotes turbulent flow patterns through the protruding portions, creating periodic mixing and renewal of cooling fluid contact with hot surfaces. This periodic action enhances heat transfer efficiency, allowing lower flow rates to achieve the same cooling effect
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, reduces temperature deviations, prevents performance degradation, and extends battery pack lifetime by actively circulating the cooling fluid and optimizing heat management, even with reduced fluid usage.
Implementation Method 1
a cooling fluid introduced into a battery pack flows to generate turbulence around a battery tab at which high-temperature heat is typically generated
Implementation Method 2
a cooling fluid introduced into a battery pack flows to generate turbulence around a battery tab at which high-temperature heat is typically generated
Data Source
AI summary
A battery pack housing for improved cooling efficiency of a battery cell is disclosed. A cooling fluid introduced into a battery pack of the battery pack housing flows to generate turbulence around a battery tab at which high-temperature heat is typically generated. A flow rate and a flow velocity of the cooling fluid may be increased around the battery tab, the cooling fluid may be more actively circulated, and a temperature deviation between cells in the battery pack may be effectively reduced so that performance degradation of the battery pack may be prevented and a lifetime of the battery pack may be increased. In addition, even when the same amount of cooling fluid is used, the cooling efficiency of the battery pack may be improved, and an amount of the fluid needed for cooling may be reduced to simplify an entire system of the battery pack.