Prismatic Battery Cooling Plate With Grooves to Limit Heat Spread
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Solution Overview
Problem
Conventional battery packs face thermal damage risks due to excessive heat conduction in the stack direction via a cooling plate during abnormal heat generation in prismatic batteries, as heat is conducted from one battery to another.
Innovation Solution
Incorporating a cooling plate with coolant passages extending perpendicular to the stack direction and heat conduction inhibitors, such as grooves, to inhibit heat conduction in the stack direction, reducing the risk of thermal damage by altering the path of heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a cooling plate is used to cool prismatic batteries in the stack direction, then cooling efficiency is improved, but heat conduction from abnormal batteries to adjacent batteries increases thermal damage risk
Solution Approach 1:
The cooling plate is segmented into multiple independent cooling channels separated by heat conduction inhibitors (grooves). This segmentation isolates the cooling zones, preventing heat from propagating between adjacent battery stacks through the cooling plate, thus reducing thermal damage risk while maintaining cooling efficiency
Solution Approach 2:
Heat conduction inhibitors (grooves) are introduced as intermediary structures between adjacent cooling channels. These grooves act as thermal barriers that block heat conduction paths in the stack direction, allowing the cooling plate to cool batteries effectively while preventing abnormal heat from spreading to adjacent batteries
2Quantity of substance
If prismatic batteries with higher energy density are used, then energy density is improved, but abnormal heat generation increases heat conduction risk
Solution Approach 1:
The heat conduction inhibitors convert the potentially harmful heat conduction path into a beneficial isolated cooling channel structure. By blocking horizontal heat conduction, the design ensures that heat generated by high-energy-density batteries remains localized and can be efficiently removed by the cooling plate without affecting adjacent batteries
Solution Approach 2:
The cooling plate is divided into independent cooling zones using heat conduction inhibitors, creating isolated thermal management zones for each battery or battery group. This segmentation allows high-energy-density batteries to be cooled effectively while preventing thermal runaway propagation
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
Significantly reduces heat conduction to adjacent prismatic batteries, thereby minimizing thermal damage and enhancing the safety of the battery pack by preventing excessive heat transfer.
Implementation Method 1
a cooling plate including a plurality of coolant passages extending in a stack direction of the prismatic batteries in the battery stack or a perpendicular direction substantially perpendicular to the stack direction and allowing a coolant to flow
Implementation Method 2
at least one heat conduction inhibitor configured to inhibit heat conduction in the stack direction, extending in the stack direction, and disposed along the battery stack
Data Source
AI summary
A battery pack includes a battery stack having a plurality of prismatic batteries being stacked. The battery pack further includes a cooling plate extending in a stack direction of the prismatic batteries in the battery stack. The cooling plate includes a plurality of coolant passages and a plurality of grooves. The coolant passages extend in a perpendicular direction substantially perpendicular to the stack direction of the prismatic batteries, and allow a coolant to flow in the coolant passages. The grooves constitute heat conduction inhibitors configured to inhibit heat conduction in the stack direction of the prismatic batteries.