Grooved Cushioning Sheet for Stable Battery Compression Force
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Solution Overview
Problem
Cushioning sheets used to suppress vibration and cell expansion in lithium-ion batteries face challenges in maintaining a stable reaction force due to rapid increases in compression, leading to unstable orientation and reduced effectiveness in preventing cell deterioration.
Innovation Solution
A cushioning sheet design featuring a flat plate with protruding portions that have cavities on the inside and grooves on the inner or outer surfaces, which act as deformation starting points when compressed, stabilizing the orientation and preventing tilting during deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the compression amount is increased to generate the desired reaction force, then the reaction force increases, but the reaction force increases rapidly and becomes unstable
Solution Approach 1:
The protruding portion is divided into multiple functional zones: a groove portion that serves as a deformation starting point, flat plate-shaped portions for structural support, and a curved plate-shaped portion for gradual deformation. This segmentation allows different regions to perform specific functions that collectively stabilize the reaction force during compression.
Solution Approach 2:
The groove is pre-formed on the inner surface of the protruding portion at a position closer to the tip than the center. This preliminary structural feature ensures that when compression occurs, deformation initiates at the groove location rather than randomly, providing consistent and stable reaction force characteristics across multiple compression cycles.
2Force
If protruding portions are provided to control compression, then the reaction force can be regulated, but the protruding portions may not maintain desired orientation when compressed
Solution Approach 1:
The groove is positioned asymmetrically on the inner surface of the protruding portion, specifically closer to the tip than to the center. This asymmetric positioning creates a predetermined deformation starting point that guides the protruding portion to deform in a consistent orientation, preventing random tilting or rotation during compression.
Solution Approach 2:
The protruding portion includes a curved plate-shaped portion that connects the tips of flat plate-shaped portions. This curved structure provides gradual deformation characteristics and helps maintain stable orientation during compression, as the curved geometry naturally resists sudden directional changes or tilting.
3Force
If the compression amount is increased to suppress cell expansion, then the desired reaction force is generated, but the orientation becomes unstable
Solution Approach 1:
The groove is pre-formed as a deformation starting point on the inner surface of the protruding portion. This preliminary structural feature ensures that when compression is applied to suppress cell expansion, the protruding portion deforms in a predictable and stable manner, maintaining consistent orientation throughout the compression process.
Solution Approach 2:
Different regions of the protruding portion have different structural qualities: the groove portion provides a controlled deformation initiation zone, the flat plate-shaped portions provide structural rigidity, and the curved plate-shaped portion provides gradual deformation capability. This local differentiation ensures stable orientation during compression while generating the required reaction force.
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 ensures a stable reaction force is generated, maintaining orientation and reducing the impact of varying compressive forces, thereby enhancing the durability and performance of lithium-ion batteries.
Implementation Method 1
A cushioning sheet design featuring a flat plate with protruding portions that have cavities on the inside and grooves on the inner or outer surfaces, which act as deformation starting points when compressed, stabilizing the orientation and preventing tilting during deformation
Data Source
AI summary
A cushioning sheet having an elastic body and including a flat plate, and a plurality of protruding portions that protrudes from the flat plate, an interior of each protruding portion being a cavity that opens in an opposite direction to a protrusion direction, wherein at least one of an inner surface and an outer surface of the protruding portion is provided with a groove that serves as a deformation starting point when the protruding portion is compressed and deformed.