Battery Pack Liquid Cooling Structure With Telescopic Ribs
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Solution Overview
Problem
Current liquid cooling setups for battery cells are not adapted to the Cell to Pack (CTP) assembly, leading to inefficiencies in heat management and assembly processes due to thermal expansion issues.
Innovation Solution
A liquid cooling structure with a vertical plate and telescopic ribs that allow for efficient heat exchange and accommodate thermal expansion, while supporting cell assemblies for direct CTP integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a liquid cooling plate is provided at the bottom of the cell set, then heat exchange cooling is achieved, but the cooling setup is not adapted to CTP assembly and assembly efficiency is reduced
Solution Approach 1:
The cooling plate is merged with the support plate into a single integrated structure. The support plate serves dual functions: providing mechanical support for the cells and acting as the cooling plate for heat dissipation. This integration eliminates the need for separate cooling plate installation steps, directly improving assembly efficiency while maintaining effective cooling functionality.
Solution Approach 2:
The support plate is designed to perform multiple functions simultaneously: structural support, thermal management, and potential electrical isolation. By making the support plate universal for both mechanical and thermal functions, the design adapts to CTP assembly requirements and reduces the number of components needed.
2Reliability
If telescopic ribs are provided in the vertical plate, then anti-expansion effect is achieved during thermal expansion, but device complexity increases
Solution Approach 1:
The telescopic ribs are specifically designed to accommodate thermal expansion of battery cells during charging and discharging. The ribs can elastically deform outward to absorb expansion forces, preventing damage to the cell and surrounding structure. This directly addresses the thermal expansion issue while maintaining structural integrity.
Solution Approach 2:
The telescopic ribs transform from a static structure to a dynamic one that can adapt its shape in response to thermal expansion forces. The ribs extend and retract based on the expansion state of the cells, providing continuous protection without requiring complex active control mechanisms.
3Quantity of substance
If cells are arranged for high energy density, then capacity increases, but heat generation increases and temperature distribution becomes uneven
Solution Approach 1:
The cooling plate is segmented with multiple cooling channels distributed across its surface, corresponding to the arrangement of battery cells. This segmentation ensures that each cell or cell group has dedicated cooling coverage, preventing hot spots and achieving uniform temperature distribution across the high-density cell arrangement.
Solution Approach 2:
The cooling channels are positioned to provide localized cooling where heat generation is highest. The support plate structure allows for optimized thermal pathways directly beneath each cell, ensuring that cooling capacity is distributed according to the local heat generation characteristics of the high-density cell arrangement.
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 solution provides effective cooling and anti-expansion protection for battery cells, enhancing assembly efficiency and cyclic service life, and ensuring safe operation during thermal expansion.
Implementation Method 1
a liquid cooling channel configured to circulate a liquid coolant is formed in the main body
Implementation Method 2
exchanging heat with the cells, thereby realizing cooling of the cells
Implementation Method 3
when a thermal expansion occurs in the cells, but the cells are not able to compress the telescopic ribs infinitely due to a certain structural strength of the telescopic ribs
Implementation Method 4
the telescopic ribs are able to be compressed when a thermal expansion occurs in the cells
Data Source
AI summary
A liquid cooling structure and a battery pack are disclosed in the present disclosure. The liquid cooling structure includes: a support plate, configured to support cells; and a vertical plate, perpendicular to the support plate. The vertical plate includes a main body and a plurality of telescopic ribs provided within the main body, a liquid cooling channel configured to circulate a liquid coolant is formed in the main body, the plurality of the telescopic ribs are spaced apart in the liquid cooling channel, and each of the telescopic ribs is connected between two opposite side walls of the liquid cooling channel to separate the liquid cooling channel into a plurality of sub-channels.