Pouch Cell Battery Pack Adhesive Layout for Stability and Cooling
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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, cell stack, adhesive blocking portion, and adhesive structures, including thermally conductive and foaming adhesives, to provide comprehensive support and prevent adhesive interference, with features like limiting portions and adhesive blocking portions to ensure uniform adhesive application and isolation of adhesives, enhancing structural integrity 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 uses composite adhesive structures combining thermally conductive structural adhesive and foaming adhesive to fix pouch cells in the battery pack. This composite approach provides both strong mechanical bonding for structural stability and thermal conduction for heat dissipation, while the pouch cell integration maintains high energy density.
2Stability of the object's composition
If multiple adhesive structures are used to fix cell stack, then structural stability is improved, but adhesive interference occurs without blocking portions
Solution Approach 1:
The patent divides the adhesive application areas into separate regions using adhesive blocking portions. These blocking portions segment the installation space to prevent different adhesives from mixing and interfering with each other, allowing multiple adhesive structures to work simultaneously without harmful interactions.
Solution Approach 2:
The adhesive blocking portion acts as an intermediary element between different adhesive structures. It physically separates the thermally conductive structural adhesive and foaming adhesive, preventing their direct contact and interference while allowing both to perform their respective functions.
3Ease of manufacture
If adhesive is applied freely between cell stack and box body, then assembly is simplified, but adhesive overflow occurs causing safety issues
Solution Approach 1:
The adhesive blocking portions are pre-installed in the battery pack before adhesive application. This preliminary action creates predefined boundaries that guide adhesive application and prevent overflow, simplifying the assembly process by eliminating the need for complex adhesive control measures.
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 improves the assembly efficiency, structural stability, and heat dissipation of pouch CTP battery packs, preventing adhesive overflow and ensuring safe, efficient operation under high current conditions.
Implementation Method 1
The first adhesive layer is a thermally conductive structural adhesive
Implementation Method 2
The second adhesive layer is a foaming adhesive
Data Source
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AI summary
The disclosure relates to the field of batteries and specifically provides a battery pack including a box body, a cell stack, an adhesive blocking portion, and at least two adhesive structures. The box body has an installation space. The cell stack includes a plurality of pouch cells and is arranged in the installation space. The adhesive structures are arranged in the installation space and directly connected between the cell stack and the box body. The adhesive blocking portion is arranged between the at least two adhesive structures to isolate the at least two adhesive structures. In the battery pack, the adhesive structures may be used to provide more comprehensive support for the cell stack, and mutual interference between different adhesive structures may be prevented.