Pouch Cell CTP Battery Pack Assembly Without End Plates
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Solution Overview
Problem
Pouch battery cells face challenges in integration into CTP battery packs due to poor resistance to external impacts and difficult assembly, which affect the efficiency and reliability of the battery system.
Innovation Solution
A battery pack design that includes a casing, a battery cell stack, thermally conductive structural adhesive, and an electrode fixing component with bus bar and bus bar bracket, which allows direct integration of pouch battery cells without end plates, enhancing space utilization and energy density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If pouch battery cells are integrated into CTP battery packs, then volume utilization and energy density are improved, but resistance to external impacts deteriorates
Solution Approach 1:
The patent merges the protective function with the structural support function by integrating the protective plate into the existing support structure of the battery pack. This combined structure simultaneously provides mechanical protection against external impacts and maintains the compact CTP configuration, resolving the contradiction between volume utilization and impact resistance.
Solution Approach 2:
The patent implements beforehand cushioning by pre-installing protective plates and shock-absorbing structures at strategic locations within the battery pack before external impacts occur. These pre-positioned protective elements are designed to absorb and distribute impact forces, thereby protecting the pouch battery cells from damage while maintaining the compact CTP design.
2Volume of moving object
If pouch battery cells are integrated into CTP battery packs, then volume utilization and energy density are improved, but assembly difficulty increases
Solution Approach 1:
The patent applies segmentation by dividing the battery pack assembly into modular sections with standardized interfaces. The protective plates, support structures, and battery cell arrays are designed as separate modules that can be independently manufactured and then easily assembled together, reducing overall assembly difficulty while maintaining the compact CTP configuration.
Solution Approach 2:
The patent implements universality by designing standardized support structures and mounting mechanisms that can accommodate different pouch battery cell configurations. These multi-functional components serve multiple purposes including mechanical support, electrical connection, and protective functions, thereby simplifying the assembly process while achieving high volume utilization.
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 improves volume utilization and energy density by eliminating the need for end plates, stabilizes the battery cell stack, and ensures reliable electrical connections, thereby enhancing the performance and efficiency of the battery pack.
Implementation Method 1
The thermally conductive structural adhesive is directly bonded between the battery cell stack and the base plate
Data Source
AI summary
Disclosed is a battery pack, including a casing, one or more battery cell stacks, and an electrode fixing component. The battery cell stack is formed by stacking a plurality of pouch battery cells along the thickness direction of the pouch battery cells. The electrode fixing component includes bus bars and a bus bar bracket supporting the bus bars. The bus bar bracket is cooperatively connected with a fixing structure on the casing, and the bus bars are cooperatively connected with an electrode of the battery cell stack.