Jelly-Roll Battery Outer Cover Structure for Shock Resistance
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Solution Overview
Problem
Battery components in electronic devices, particularly those with a jelly-roll structure, are prone to damage from external shocks due to interference between electrodes and other components, leading to physical, electrical, or chemical malfunctions.
Innovation Solution
A protective structure is implemented around the jelly-roll battery, including a polymeric outer cover layer and adhesive layers to encase and secure the components, reducing movement and potential damage from external forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If battery components are arranged in a narrow space to achieve compact design, then space utilization is improved, but the battery becomes vulnerable to damage from external shocks causing electrode interference
Solution Approach 1:
The patent applies beforehand cushioning by introducing a protective member that surrounds the jelly-roll structure before external shocks occur. This protective member acts as a cushioning barrier that absorbs and distributes impact forces, preventing direct transmission to the battery components. The protective member is positioned in advance to ensure it can immediately mitigate damage when external forces are applied, resolving the contradiction between compact design and shock resistance.
2Reliability
If a protective structure is added around the jelly-roll structure to prevent damage, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent employs flexible shells and thin films by using a protective member that can be configured as a flexible protective layer or thin-walled structure surrounding the jelly-roll. This approach provides effective protection against external shocks while maintaining a sleek, compact form factor. The flexible nature of the protective member allows it to conform to the battery geometry without adding excessive bulk or structural complexity, thus resolving the contradiction between reliability improvement and device complexity.
3Stability of the object's composition
If adhesive layers are used to secure the jelly-roll structure to reduce movement, then stability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the protective structure into distinct functional segments: the protective member that surrounds the jelly-roll and adhesive layers that secure it in place. This segmentation allows each component to be optimized independently - the protective member for shock resistance and the adhesive layers for stable fixation. The modular segmented design simplifies the manufacturing process compared to integrating all functions into a single complex component, thus resolving the contradiction between stability improvement and manufacturing ease.
Data Source
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AI summary
An electronic device and battery included therein are disclosed. The device includes a battery which itself comprises a jelly-roll structure having a rolled stack of a cathode, a separator, and an anode; an outer cover layer enclosing surfaces of the jelly-roll; and a pouch sealing the jelly-roll and the outer cover layer. The jelly-roll includes a first surface, a second surface disposed in a opposite direction, a third surface corresponding to one side of the rolled stack and connecting the first surface and the second surface, and a fourth surface corresponding to other side of the rolled stack, connecting the first surface and the second surface, and disposed in a direction opposite to the third surface. The outer cover layer includes a first portion, a second portion, a third portion, and a fourth portion bonded to first, second, third and fourth surfaces, respectively.