Flexible Battery Package With Cushioning Support Module
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Solution Overview
Problem
Flexible battery cells packaged in conventional hard shells lose flexibility and are prone to peeling or separation when bent, compromising their integrity, safety, cycle life, and bendability.
Innovation Solution
A flexible package design featuring a support module with a first and second structural member and cushioning members that absorb binding forces, creating a placing space for the battery cell to reduce defects like peeling or separation during bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional hard shell packaging is used for flexible battery cells, then the structural protection is improved, but the flexibility and bendability of the battery cell are reduced
Solution Approach 1:
The patent replaces conventional hard shell packaging with a flexible package comprising a flexible body and a support module. The flexible body includes first and second flexible sheets that can bend and deform, allowing the battery cell to maintain its flexibility while still providing protective enclosure. This directly resolves the contradiction by using flexible materials instead of rigid hard shells.
Solution Approach 2:
The packaging is divided into functional segments: the flexible body (first and second flexible sheets) and the support module (with support members and cushioning members). This segmentation allows different parts to perform specialized functions - the flexible sheets provide bendability while the support module provides structural protection, resolving the contradiction between flexibility and strength.
2Adaptability or versatility
If the flexible cell is packaged in a flexible package without additional support structures, then the flexibility is maintained, but the cell is prone to peeling or separation during bending
Solution Approach 1:
The patent incorporates cushioning members within the support module that are positioned to provide protective cushioning to the battery cell before bending or mechanical stress occurs. These cushioning members absorb and distribute stresses during deformation, preventing peeling or separation of the cell layers, thus maintaining both flexibility and integrity.
Solution Approach 2:
The support module acts as an intermediary between the flexible body and the battery cell. It includes support members that extend along the bending direction and cushioning members that provide mechanical mediation, distributing forces and preventing direct stress concentration on the cell, thereby preventing peeling while maintaining flexibility.
3Reliability
If support structures are added to protect the battery cell during bending, then the integrity is improved, but the binding force to the flexible body increases
Solution Approach 1:
The flexible body consists of first and second flexible sheets that can deform and adapt to bending stresses. These flexible sheets provide binding and attachment functions while maintaining flexibility, reducing the need for strong rigid binding forces. The flexible nature of the sheets allows them to conform to the cell shape and provide secure attachment without excessive binding force.
Solution Approach 2:
The patent changes the mechanical parameters of the binding structure by using flexible materials with appropriate elasticity and compliance. The flexible sheets and support members are designed with specific mechanical properties that allow them to provide necessary binding force while accommodating bending deformation, effectively reducing the overall binding force requirement while maintaining integrity.
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 flexible package enhances the integrity, safety, cycle life, and bendability of the battery cell by distributing stress and reducing frictional forces, thereby protecting the electrode layers and maintaining structural protection.
Implementation Method 1
The cushioning member interposed between the peripheral edge of the first structural member and the second structural member to resist the binding force and to support the first structural member and the second structural member
Data Source
AI summary
A flexible package has a bendability effective to at least maintain the bendability of at least one flexible battery cell accommodated therein. The flexible package includes a support module disposed in a flexible body and including a first structural member, a second structural member and at least two cushioning members that define a space for accommodating the at least one flexible battery cell when the support module is under the binding force of the flexible body. When the flexible body and the at least one flexible battery cell bend, the stress acting on the at least one flexible battery cell is reduced by the first structural member, the second structural member and the at least two cushioning members. Therefore, electrode layers inside the at least one flexible battery cell are protected and the integrity, safety, cycle life and bendability of the flexible cell are improved.