Battery Buffer Layer on Separator Protrusions for Drop Impact
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Solution Overview
Problem
Current battery designs face safety issues due to internal short circuits caused by electrode assembly displacement and separator shrinkage during drops, which existing methods fail to adequately address, leading to risks of fire and explosion.
Innovation Solution
Incorporating a buffer layer between the electrode assembly and the package bag, specifically on separator protrusions, with an adhesive layer to enhance impact resistance and prevent direct collisions, thereby absorbing impact energy and preventing internal short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the electrode assembly is bonded to the package bag to prevent movement during falling, then the electrode assembly displacement is reduced, but the risk of short circuit increases due to tearing the aluminum foil inside the electrode assembly
Solution Approach 1:
A buffer layer is introduced as an intermediary component between the electrode assembly and the package bag. This buffer layer absorbs impact forces during falling, preventing direct transmission of force that would tear the aluminum foil, while still maintaining electrode assembly position stability without causing short circuits
2Stability of the object's composition
If the separator protrusion is left exposed to provide structural support, then the separator stability is improved, but internal short circuit occurs due to separator shrinkage during falling
Solution Approach 1:
The buffer layer is positioned in advance on the separator protrusion to provide cushioning protection before impact occurs. During falling, this pre-positioned buffer layer absorbs impact forces, preventing separator shrinkage and the subsequent internal short circuits that would occur without such protective cushioning
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 buffer layer effectively enhances the battery's drop resistance and safety performance by absorbing impact energy, preventing separator shrinkage and direct collisions, thus reducing the risk of internal short circuits and improving overall safety.
Implementation Method 1
the buffer layer is further arranged on the at least one separator protrusion... the buffer layer effectively enhances the battery's drop resistance and safety performance by absorbing impact energy
Data Source
AI summary
The present application provides a battery and an electronic device thereof. The battery comprises: a electrode assembly having at least one separator protrusion; a package bag for accommodating the electrode assembly; and a buffer layer arranged between the electrode assembly and the package bag; wherein the buffer layer is further arranged on the at least one separator protrusion. The purpose of the present application is to provide a battery and an electronic device thereof which are capable of improving the drop resistance performance of the battery and improving the safety performance of its use.