Battery Module Case Reinforcing Fiber Strength
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Solution Overview
Problem
Rechargeable battery modules face structural weaknesses due to swelling during charging and discharging, leading to potential module case destruction and increased weight when attempting to enhance strength through thicker cases, which compromises device performance.
Innovation Solution
Incorporating reinforcing fibers, such as glass or carbon fibers, within the engineering plastic module case, specifically in the form of housing units and covers, to provide structural support aligned with the battery alignment direction, enhancing the module case's strength while maintaining a reduced thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the thickness of the module case is increased to enhance strength, then the module case can better resist battery swelling pressure, but the weight of the battery module is excessively increased
Solution Approach 1:
The module case is constructed using composite materials consisting of engineering plastic as the base material and reinforcing fibers (glass fiber or carbon fiber) embedded within. This composite structure provides enhanced strength and rigidity to resist battery swelling pressure while maintaining a thin profile and minimizing weight increase, as the high-strength fibers provide structural reinforcement without the mass penalty of simply thickening the plastic case
2Strength
If the thickness of the module case is increased to enhance strength, then the module case can better resist battery swelling pressure, but the device performance is deteriorated due to excessive weight
Solution Approach 1:
The composite construction with engineering plastic and reinforcing fibers achieves the necessary strength to resist battery swelling, thereby maintaining device reliability and performance. The thin-walled design enabled by this composite approach avoids the weight penalty that would otherwise compromise device performance, while still providing adequate structural support throughout the battery's charge-discharge cycles
3Strength
If reinforcing fiber is incorporated in the module case, then the strength is improved, but the manufacturing complexity is increased
Solution Approach 1:
Reinforcing fibers are strategically positioned within the module case at locations where strength is most needed, such as in areas subjected to highest swelling pressure from the batteries. This localized reinforcement approach provides targeted strength enhancement without requiring complex structures throughout the entire case, and the fibers are integrated into the molding process to avoid excessive manufacturing complexity
Data Source
AI summary
A battery module includes a plurality of rechargeable batteries, and a module case housing the plurality of rechargeable batteries, wherein at least one part of one side of the module case includes reinforcing fiber. Accordingly, the strength of the module case is improved.