Pouch Cell Battery Pack Adhesive Isolation for Stable CTP Assembly
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Solution Overview
Problem
Soft-pack 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 with adhesive structures and blocking portions to stabilize the cell stack, using thermally conductive and foaming adhesives to enhance support and insulation, and limiting portions to control adhesive thickness and prevent interference, along with side plates for pre-tightening during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If soft-pack cells are integrated into CTP-type battery packs, then energy density is improved, but assembly performance and impact resistance deteriorate
Solution Approach 1:
The patent introduces adhesive structures as intermediary components between the soft-pack cells and the battery pack casing. These adhesives provide mechanical support and stabilization to the soft-pack cells, compensating for their inherent weakness in impact resistance while maintaining the direct integration approach of CTP design. The adhesive layer acts as a mediator that transfers and distributes mechanical stresses, improving assembly performance without compromising energy density.
Solution Approach 2:
The patent applies adhesive structures in advance during the assembly process to provide protective support to soft-pack cells before they are subjected to external impacts. This beforehand cushioning approach ensures that the cells are pre-supported and stabilized, reducing the risk of damage during assembly and operation while maintaining the compact CTP configuration.
2Stability of the object's composition
If multiple adhesive structures are used to support the cell stack, then structural stability is improved, but adhesive interference and complexity increase
Solution Approach 1:
The patent extracts and separates different adhesive functions into distinct adhesive structures positioned at different locations within the battery pack. By separating the adhesive support functions into multiple independent structures, the patent reduces interference between adhesives while maintaining comprehensive structural stability. Each adhesive structure can be optimized independently for its specific function.
Solution Approach 2:
The patent divides the adhesive support system into multiple segmented adhesive structures distributed throughout the battery pack. This segmentation allows each adhesive structure to focus on supporting specific regions of the cell stack, reducing overall interference while collectively providing enhanced structural stability. The segmented approach also simplifies the design and application process.
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 provides comprehensive support for the cell stack, improves heat dissipation, enhances structural stability, and prevents adhesive interference, ensuring safety and efficiency in the battery pack.
Implementation Method 1
The first adhesive layer is a thermally conductive structural adhesive
Implementation Method 2
the other adhesive structure is constructed as a second adhesive layer and is filled and bonded between a tab side of the cell stack and the beam structure
Data Source
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 soft-pack 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.