Battery Module Compression Pad Laminate for Edge Insulation Assembly
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Solution Overview
Problem
Conventional battery modules face issues with insulation, particularly at the sealing portions of pouch-type cells, and are prone to defects during assembly due to interference and exposure during the assembly process.
Innovation Solution
A battery module design featuring compression pads made of a laminate of an elastic pad and a synthetic resin film, with an extended length portion to cover and protect the cell stack, ensuring insulation and minimizing assembly defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an eaves-shaped insulating film is added to protect the cell stack edge, then insulation performance is improved, but the film is vulnerable to interference and damage during assembly
Solution Approach 1:
The patent merges the insulating film and the compression pad into a single integrated component. The compression pad includes an insulating film layer that provides both insulation and mechanical compression functions simultaneously, eliminating the need for separate eaves-shaped films and reducing assembly complexity
Solution Approach 2:
The compression pad is constructed as a composite structure with multiple layers including an insulating film layer, a buffer layer, and a compression layer. This composite design provides both electrical insulation and mechanical protection while maintaining structural integrity during assembly
2Reliability
If additional insulators are inserted into the frame member to ensure insulation, then insulation reliability is improved, but device complexity increases
Solution Approach 1:
The compression pad serves multiple functions simultaneously: it provides electrical insulation through the insulating film layer, mechanical compression through the compression layer, and shock absorption through the buffer layer. This multi-functional design eliminates the need for separate insulators and simplifies the overall structure
Solution Approach 2:
The patent combines the insulation function with the compression and buffering functions into a single integrated pad component, reducing the number of parts and simplifying the battery module structure
3Ease of manufacture
If the compression pad uses only a buffer member, then assembly is simplified, but insulation performance is insufficient for outermost cells
Solution Approach 1:
The compression pad is constructed as a composite structure with multiple layers including an insulating film layer, a buffer layer, and a compression layer. This composite design provides both electrical insulation and mechanical protection while maintaining structural integrity during assembly
Solution Approach 2:
The insulating film layer is specifically positioned at the outermost surfaces of the compression pad where contact with the cell stack occurs, providing localized insulation where it is most needed for the outermost cells
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
Enhances insulation performance by covering exposed cutting surfaces and folding portions, simplifies the structure by eliminating the need for additional insulators, and reduces assembly defects.
Implementation Method 1
a buffer member 30 is provided between the cell stack 10 and the case 22. The buffer member 30 is compressed according to the expansion of the cell due to swelling to absorb the swelling
Implementation Method 2
An insulator is additionally inserted into the main region inside the frame member 20 to ensure insulation from the cell stack 10
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 3
AI summary
A battery module according to an embodiment of the present disclosure includes a cell stack in which a plurality of cells are stacked; and a compression pad provided on an outer surface of the cell stack, wherein the compression pad is a laminate of an elastic pad and a synthetic resin film attached to at least one surface of the elastic pad, wherein the synthetic resin film includes a length extension portion longer than the elastic pad in length, and the length extension portion is folded to cover and protect the upper surface of the cell stack.