Coin-Shaped Rechargeable Battery Structure for Capacity and Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing rechargeable batteries face challenges in achieving efficient weight reduction, increased electrical capacity, and structural stability, particularly in very small form factors required for wearable devices, where safety and size constraints are critical.
Innovation Solution
A rechargeable battery design featuring an electrode assembly with a reinforcing member of greater rigidity, a coin shape with a specific diameter-to-height ratio, and an insulating member to prevent short circuits and swelling, along with a unique configuration for the electrode tab and vent sealing to manage internal pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the battery size is reduced for wearable devices, then the device portability is improved, but the electrical capacity decreases
Solution Approach 1:
The patent changes the geometric parameters of the battery by adopting a coin-shaped configuration with optimized diameter-to-height ratio, and modifies the electrode assembly structure with a wound configuration and reinforcing members to maximize capacity within the constrained volume
Solution Approach 2:
The patent employs composite material structures including the combination of flexible exterior materials with rigid reinforcing members, and uses composite electrode structures with current collectors and active material coatings to achieve high energy density in a small form factor
2Volume of moving object
If the battery size is reduced, then the device portability is improved, but the structural stability deteriorates
Solution Approach 1:
The patent segments the battery structure into distinct functional components: electrode assembly, separator, exterior materials, and reinforcing members, allowing each component to be optimized independently for its specific function while maintaining overall structural integrity
Solution Approach 2:
The patent applies local quality by placing reinforcing members with greater rigidity at specific locations within the battery structure where mechanical support is most needed, rather than uniformly increasing the rigidity of the entire battery housing
3Volume of moving object
If the battery size is reduced, then the device portability is improved, but the safety deteriorates
Solution Approach 1:
The patent incorporates protective measures in advance by including reinforcing members that prevent external impacts from damaging the electrode assembly, and designs the exterior materials to contain potential swelling before it becomes hazardous
Solution Approach 2:
The patent introduces intermediary protective elements such as the separator that prevents direct contact between electrodes, and the exterior materials that act as a barrier between the active battery components and the external environment
Data Source
AI summary
Disclosed is a rechargeable battery including: an electrode assembly wound with a separator between a first electrode and a second electrode; a first exterior material including an opening receiving the electrode assembly and facing a bottom side of the electrode assembly; a second exterior material covering the opening, and combined to the first exterior material to seal an internal side of the first exterior material; and a reinforcing member having greater rigidity than the first exterior material and the second exterior material, disposed between the electrode assembly and the first exterior material, and including a side wall for surrounding a lateral side of the electrode assembly.