Protective Casing for Safer Lithium Batteries
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Summary
Problems
Current protective measures for sulphurous electrolytes in lithium batteries are insufficient in preventing moisture-induced deterioration and harmful gas emission, particularly in macroscopic batteries, which face mechanical stresses and volume variations, while also affecting electrochemical performance.
Innovation solutions
A protective casing is applied to the lateral surface of the electrolytic layer and electrodes in lithium batteries, comprising a chemical protection and mechanical reinforcement layer, which is electrically insulating and designed to inhibit moisture contact, reducing harmful gas emissions and accommodating volume variations.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If a protective nanolayer is applied at the interface between active material and electrolyte, then the active material is protected, but electronic transfer between active layer and passivation layer is hindered
Why choose this principle:
The patent introduces an intermediary protective casing made of electrically insulating material that encapsulates the entire stack laterally. This casing acts as a mediator that protects the electrolyte and active materials from moisture without interfering with electronic transfer, as it is positioned externally rather than at the critical interface between active material and electrolyte.
Principle concept:
If the entire battery arrangement is encapsulated, then protection is provided, but the encapsulation is insufficient for macroscopic batteries with sulphurous electrolytes
Why choose this principle:
The patent applies protective casing specifically to the lateral outer surfaces of the stack where the electrolyte is most exposed to moisture. This localized protection approach focuses on the critical areas susceptible to moisture ingress while accommodating the specific requirements of macroscopic batteries with sulphurous electrolytes.
Application Domain
Data Source
AI summary:
A protective casing is applied to the lateral surface of the electrolytic layer and electrodes in lithium batteries, comprising a chemical protection and mechanical reinforcement layer, which is electrically insulating and designed to inhibit moisture contact, reducing harmful gas emissions and accommodating volume variations.
Abstract
This invention concerns an electrochemical element, in particular a sulphurous solid electrolyte element, comprising a protective casing, as well as modules and batteries comprising such elements.