Pouch Cell CTP Pack Structure for Stability and Heat Dissipation
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Solution Overview
Problem
Pouch cells face issues with external impact resistance and assembly performance when integrated into CTP-type battery packs, leading to structural instability and poor heat dissipation.
Innovation Solution
A battery pack design incorporating a box body, thermally conductive structural adhesive, and side plates with grooves and reinforcing ribs to stabilize and secure pouch cells, along with limiting portions and foaming adhesives to enhance assembly and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If pouch cells are integrated into CTP-type battery packs, then energy density is improved, but structural stability deteriorates due to poor impact resistance
Solution Approach 1:
The patent applies beforehand cushioning by providing buffer structures between pouch cells and the battery pack casing. These buffer structures absorb external impacts before they reach the pouch cells, preventing structural damage while maintaining the high energy density configuration. The buffer structures are positioned in advance to cushion against potential impacts from multiple directions.
Solution Approach 2:
The patent employs composite materials by combining pouch cells with reinforcing frames and buffer structures made of different materials. The frame provides structural support while the pouch cells maintain energy density, creating a composite system that achieves both high energy density and structural stability. The different materials work together to compensate for the individual weaknesses of each component.
2Volume of moving object
If pouch cells are integrated into CTP-type battery packs, then space utilization is improved, but assembly performance deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the battery pack into modular units with standardized interfaces. The pouch cells are arranged in segmented modules that can be assembled systematically. The buffer structures and frames are also segmented to match the modular configuration, making assembly easier while maximizing space utilization. Each module can be assembled independently and then combined into the complete battery pack.
3Temperature
If pouch cells are integrated into CTP-type battery packs, then cooling performance is improved, but heat dissipation deteriorates
Solution Approach 1:
The patent introduces thermal interface materials as intermediaries between the pouch cells and the cooling plates. These thermal interface materials improve the thermal contact between components, facilitating better heat transfer from the cells to the cooling system. The intermediary materials ensure efficient heat dissipation while maintaining the cooling performance required for high-energy-density configurations.
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 design allows for easy assembly and improved heat dissipation, structural stability, and enhanced safety of pouch CTP battery packs, addressing the challenges of pouch cell integration.
Implementation Method 1
The thermally conductive structural adhesive is arranged between the cell stack and the lower casing bottom plate and is bonded and fixed to the cell stack and the lower casing bottom plate
Implementation Method 2
along with limiting portions and foaming adhesives to enhance assembly and heat dissipation
Data Source
Figure 1~2
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AI summary
The disclosure relates to the technical field of batteries and specifically provides a battery pack and an electric vehicle. The battery pack includes a box body (1) having a lower casing bottom plate (13), a cell stack (2) formed by stacking a plurality of pouch cells (23), a thermally conductive structural adhesive (25) arranged between the cell stack (2)and the lower casing bottom plate (13), side plates (24) arranged at both ends of the cell stack (2) in a stacking direction and adhered to main body surfaces of the pouch cells (23) at both ends, and fixture fitting portions arranged on surfaces of the side plates (24) opposite to the pouch cells (23). In the solution, a pouch cell to pack (CTP) battery pack is constructed based on the pouch cells, the cell stack formed by stacking the pouch cells can be well protected, and assembly can be easily performed.