Immersion Cooling Pads for Battery Core Hotspot Control
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Solution Overview
Problem
Indirect cooling methods for high-performance batteries suffer from low thermal conductivity due to electrical insulation materials and limited heat transfer, failing to effectively cool the battery core, which can lead to high temperatures and reduced stability.
Innovation Solution
An immersion cooling system with surface pressure pads having multiple cooling paths through which a cooling fluid flows, distributed between battery cells, and a distribution plate to enhance heat distribution and prevent pressure concentration, increasing the heat exchange area and stability of the battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If indirect water cooling method is used with cooling block and heat transfer material, then cooling path is established, but thermal conductivity is low due to electrical insulation material and contact heat resistance
Solution Approach 1:
The patent removes the heat transfer material layer from the cooling system, allowing the cooling fluid to directly contact the battery cell surface. This extraction of the insulating material eliminates the thermal resistance barrier while maintaining electrical insulation through the cooling fluid's properties and system design.
Solution Approach 2:
The cooling fluid serves as a dual-function intermediary: it provides thermal conduction for efficient heat transfer when directly contacting the battery, while also maintaining electrical insulation through its dielectric properties. This resolves the contradiction between thermal conductivity and electrical insulation requirements.
2Temperature
If cooling block contacts only bottom surface of battery, then cooling structure is simple, but top of battery farthest from cooling block is not cooled
Solution Approach 1:
The patent segments the cooling function by implementing multiple cooling paths that contact different regions of the battery cell (bottom, side, and top surfaces). This segmentation of cooling zones ensures comprehensive thermal management of the entire battery, including the previously unreachable core and top regions.
Solution Approach 2:
The cooling system transitions from single-point bottom contact to multi-dimensional cooling by extending cooling paths along the side surfaces and reaching the top of the battery. This dimensional expansion of cooling coverage ensures all regions including the core are effectively cooled.
3Temperature
If surface pressure pad is placed between battery cells, then cooling paths are positioned, but pressure may be concentrated on specific portion
Solution Approach 1:
The surface pressure pad incorporates locally varied cooling path densities, with higher concentration in regions requiring enhanced cooling (such as high-heat-generation zones) and lower density in other areas. This localized optimization achieves effective heat distribution while distributing mechanical pressure evenly across the battery cell surfaces.
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 immersion cooling system effectively cools the entire battery cell by increasing the heat exchange area and distributing heat evenly, preventing temperature hotspots and enhancing the stability of the battery module by minimizing contact heat resistance and pressure concentration.
Implementation Method 1
a cooling fluid to flow through the cooling path... effectively cools the entire battery cell by increasing the heat exchange area and distributing heat evenly
Implementation Method 2
The immersion cooling system effectively cools the entire battery cell by increasing the heat exchange area and distributing heat evenly
Data Source
AI summary
Provided is an immersion cooling system, and more particularly, an immersion cooling system which may more efficiently manage a temperature of a battery. The immersion cooling system may increase a heat exchange area and solve a problem of a high temperature of a cell core by positioning a plurality of cooling paths through each of which a cooling fluid flows in surface pressure pads stacked on each other between battery cells.