Battery Pack Liquid Cooling Structure for CTP Thermal Expansion
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Solution Overview
Problem
Current liquid cooling setups for battery cell sets 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 modules for direct CTP assembly, using materials like aluminum alloy for durability and nylon for corrosion resistance.
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 and cooling effect are improved, but the structure is not adapted to CTP assembly and assembly efficiency deteriorates
Solution Approach 1:
The patent merges the cooling plate with the support plate into a single integrated structure. The support plate simultaneously provides mechanical support for the cells and functions as the cooling plate for heat dissipation, eliminating the need for separate cooling plate installation and improving assembly efficiency while maintaining effective cooling
2Strength
If a rigid cooling plate structure is used, then structural strength is improved, but thermal expansion of cells causes deformation or damage
Solution Approach 1:
The patent introduces an elastic layer between the support plate and the cells. This elastic layer acts as a flexible interface that can deform to accommodate thermal expansion of the cells during charging and discharging cycles, preventing damage to both the cells and the support plate while maintaining structural integrity
Solution Approach 2:
The elastic layer serves as a pre-configured cushioning element that anticipates and absorbs the thermal expansion forces before they can cause damage. By placing this compliant layer in advance, the design prevents potential deformation or damage to the rigid support plate and cells during thermal cycling
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 during charging and discharging, withstands thermal expansion, and enhances assembly efficiency by allowing direct integration into battery packs, improving safety and cyclic service life.
Implementation Method 1
a liquid cooling channel configured to circulate a liquid coolant is formed in the main body
Implementation Method 2
circulate a liquid coolant
Implementation Method 3
when a thermal expansion occurs in the cells
Implementation Method 4
the telescopic ribs are able to be compressed when a thermal expansion occurs in the cells
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A liquid cooling structure (100) and a battery pack are disclosed in the present disclosure. The liquid cooling structure (100) includes: a support plate (10), configured to support cells (200); and a vertical plate (20), perpendicular to the support plate (10). The vertical plate (20) includes a main body (21) and a plurality of telescopic ribs (22) provided within the main body (21), a liquid cooling channel (23) configured to circulate a liquid coolant is formed in the main body (21), the plurality of the telescopic ribs (22) are spaced apart in the liquid cooling channel (23), and each of the telescopic ribs (22) is connected between two opposite side walls of the liquid cooling channel (23) to separate the liquid cooling channel (23) into a plurality of sub-channels (231).