Liquid Cooling Tube Layout for Battery Pack Thermal Diffusion Control
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Solution Overview
Problem
Existing battery pack designs with harmonica tube cooling systems face challenges in managing heat transfer during thermal runaway, as the heat generated can be excessively transferred to adjacent batteries, increasing the risk of thermal diffusion and reducing heat dissipation efficiency due to pipe flow defects.
Innovation Solution
A battery pack design featuring a liquid cooling tube with cooling portions arranged orthographically on the battery array, where at least one battery is located outside the cooling regions, and the cooling tube's direction is not parallel to the battery arrangement, reducing heat transfer to adjacent batteries and incorporating heat insulation structures to block heat transfer between units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the liquid cooling tube flows parallel to the length direction of the module to increase heat exchange area, then the heat dissipation effect is improved, but the heat transfer path to adjacent batteries is expanded increasing thermal diffusion risk
Solution Approach 1:
The battery array is divided into multiple independent battery units with heat insulation structures between them. The liquid cooling tube is segmented into multiple cooling portions, each serving specific batteries. This segmentation isolates thermal runaway propagation while maintaining effective heat dissipation through distributed cooling zones.
Solution Approach 2:
Heat insulation structures are selectively placed between adjacent battery units to block thermal diffusion paths. The liquid cooling tube provides localized cooling to specific batteries through multiple cooling portions, creating different thermal management zones within the same module.
2Area of stationary object
If harmonica tubes are used with pipe flow design, then the solid-liquid heat exchange area is increased, but the heat exchange potential decreases downstream resulting in lower heat dissipation efficiency
Solution Approach 1:
The liquid cooling tube is divided into multiple cooling portions along its length, creating distributed heat exchange zones. This segmentation allows fresh cooling liquid to reach each section, maintaining high heat exchange potential throughout the entire cooling system rather than having depleted liquid flow through all sections.
Solution Approach 2:
The cooling portions are arranged in a configuration that utilizes spatial dimensions effectively. The orthographic projections of cooling portions on the battery array create cooling regions that cover different areas, allowing multi-zone heat dissipation that maintains temperature uniformity across the battery pack.
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 differences among batteries, inhibits thermal runaway by efficiently dissipating heat away from affected batteries, and minimizes heat transfer to adjacent units, enhancing overall thermal management.
Implementation Method 1
liquid cooling tube...configured to dissipate heat for the batteries
Implementation Method 2
heat conduction management design...solid-liquid heat exchange area
Implementation Method 3
incorporating heat insulation structures to block heat transfer between units
Data Source
AI summary
The disclosure relates a battery technology field, and in particular, relates to a battery pack. The battery pack includes a battery array and a liquid cooling tube. The battery array includes at least two batteries, and the batteries are arranged in a first direction. The liquid cooling tube is disposed on a surface of the battery array and is configured to dissipate heat for the batteries. The liquid cooling tube includes cooling portions, and the cooling portions are portions of an orthographic projection of the liquid cooling tube on the battery array. Orthographic projections of the cooling portions on the battery array are cooling regions. In the battery array, at least one of the batteries is located outside a range of the cooling portions.