Battery Case with Integrated Fiber Tape for Laminated Cells
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Solution Overview
Problem
Conventional battery cases for laminated battery cells require complex manufacturing processes and additional parts, such as binding bands, which increase costs and risk deformation under load, compromising pressurization and battery performance.
Innovation Solution
A battery case with a storage part made of resin, integrated with fiber tape arranged along the side walls to hold laminated battery cells in a pressurized state, improving strength and reducing the need for separate pressurizing components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If binding bands are used to pressurize battery cells, then battery performance is improved, but manufacturing process becomes complex and cost increases
Solution Approach 1:
The fiber tape is integrated directly into the battery case structure, merging the pressurization function with the housing. The fiber tape is arranged within the battery case to pressurize the battery cells in the lamination direction, eliminating the need for separate binding bands and reducing manufacturing complexity
Solution Approach 2:
The battery case uses composite material construction with fiber tape embedded in the resin structure. The fiber tape provides enhanced mechanical strength and pressurization capability while being integrated into the case body, combining structural support and cell compression functions
2Strength
If binding bands are used to pressurize battery cells, then battery performance is improved, but manufacturing cost increases
Solution Approach 1:
The fiber tape is integrated directly into the battery case structure, merging the pressurization function with the housing. The fiber tape is arranged within the battery case to pressurize the battery cells in the lamination direction, eliminating the need for separate binding bands and reducing manufacturing complexity
Solution Approach 2:
The battery case structure serves multiple functions: it provides structural housing, structural support, and cell pressurization. The fiber tape integrated into the case performs both reinforcement and compression functions simultaneously, reducing the total number of components required
3Ease of manufacture
If battery cells are stored in compressed state without binding bands, then manufacturing process is simplified, but battery case deforms under load
Solution Approach 1:
The battery case uses composite material construction with fiber tape embedded in the resin structure. The fiber tape provides enhanced mechanical strength and pressurization capability while being integrated into the case body, combining structural support and cell compression functions
Solution Approach 2:
The fiber tape is strategically positioned at specific locations within the battery case where maximum pressurization and structural reinforcement are needed. The tape is arranged to contact the battery cells directly in the lamination direction, providing localized strength where required while maintaining overall case simplicity
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 enhances the strength of the battery case against load, maintains a pressurized state, improves battery performance, suppresses swelling, simplifies manufacturing, and reduces costs by eliminating the need for additional parts like binding bands.
Implementation Method 1
a fiber tape arranged integrally with side walls forming the storage part and formed by impregnating fiber arranged in a longitudinal direction with the resin
Data Source
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AI summary
Provided is a battery case which makes it possible for a battery cell to be placed in a continuously pressured state without increasing the complexity of the battery module manufacturing process. Specifically, the present invention has: a plastic first accommodation unit 3 and second accommodation unit 4 in which a laminated body of a battery cell 2 is accommodated; a UD tape 6 integrally positioned on a first side wall 11, a second side wall 12, and a third side wall 13, which form the first accommodation unit 3; and a UD tape 7 integrally positioned on the first side wall 11, which form the second accommodation unit 4. The UD tapes 6 and 7 are configured, in particular, to be positioned straddling the third side walls 13, 17 from the second side walls 12, 16 across the first side wall 11.