Elastic Frame for Battery Module Sag and Vibration Control
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Solution Overview
Problem
Battery modules formed by stacking unit battery cells tend to sag and vibrate due to static and dynamic loads, leading to performance degradation.
Innovation Solution
Incorporating an elastic frame that is bent and assembled below the unit battery cells, providing elastic support to suppress sagging and vibration, and coupled with end plates and lower frames using support protrusions and spacers to control elastic force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If unit battery cells are stacked to form battery modules, then battery capacity and energy density are improved, but sagging and vibration occur due to static and dynamic loads
Solution Approach 1:
The frame's physical state is changed from rigid to elastic by selecting materials and designing structures with appropriate elastic moduli. The elastic frame is configured with specific elastic coefficients to provide controlled support force that adapts to the battery modules' weight and vibration characteristics, resolving the contradiction between structural stability and load-bearing capacity
Solution Approach 2:
The frame is designed with elastic properties that allow it to dynamically respond to static and dynamic loads. The elastic frame can deform elastically under the weight of battery modules and return to its original shape, providing continuous support and vibration damping without rigid constraints, thus maintaining structural stability while accommodating high battery capacity
2Stability of the object's composition
If rigid support structures are used to prevent sagging, then structural stability is improved, but vibration and stress concentration increase
Solution Approach 1:
The frame material and structure are designed with specific elastic coefficients to provide controlled support force that adapts to the battery modules' weight and vibration characteristics, resolving the contradiction between structural stability and load-bearing capacity
Solution Approach 2:
The elastic frame is designed to provide pre-compression force to the battery modules before operation. This pre-cushioning effect prevents sagging while the elastic properties absorb vibration and reduce stress concentration during dynamic operation, eliminating the need for rigid support structures
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 elastic frame effectively supports both static and dynamic loads, stabilizing the battery module and reducing vibration, thereby enhancing the performance and reliability of the battery pack.
Implementation Method 1
an elastic frame below the unit battery cells, the elastic frame extending in the first direction and the elastic frame having the capability of being elastically biased in a second direction
Data Source
AI summary
A battery module including a plurality of unit battery cells stacked in a first direction; a pair of end plates spaced from each other in the first direction and accommodating the unit battery cells therebetween; an elastic frame below the unit battery cells, the elastic frame extending in the first direction and the elastic frame having the capability of being elastically biased in a second direction.