All-Solid-State Battery Case with Solid Aerosol Fire Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
All-solid-state batteries still pose a risk of fire due to the generation of heat and oxygen during thermal runaway, despite reducing flammable gas generation, as positive and negative active materials can act as fuel.
Innovation Solution
Incorporating a fire-extinguishing agent within the battery case that produces a solid aerosol, including potassium compounds like potassium carbonate or potassium nitrate, which releases potassium ions to react with oxide and hydroxide ions, forming stable compounds to extinguish fires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If solid electrolytes are used in all-solid-state batteries, then the generation of flammable gases is reduced, but the risk of fire still exists due to heat and oxygen generation during thermal runaway
Solution Approach 1:
A fire-extinguishing agent is pre-installed inside the battery case between the battery body and the case. When thermal runaway occurs, this pre-positioned agent immediately activates to suppress the fire, preventing the progression from reduced flammable gas generation to actual fire incidents
Solution Approach 2:
The fire-extinguishing agent acts as an intermediary substance that mediates between the battery components and the external environment during thermal runaway. It chemically interacts with the fire triangle elements (heat, oxygen, fuel) to suppress combustion, thereby resolving the contradiction between reduced flammable gas and remaining fire risk
2Reliability
If a fire-extinguishing agent is added to the battery case, then fire risk is reduced, but the device complexity increases
Solution Approach 1:
The fire-extinguishing agent is integrated into a thin film or sheet structure that can be easily placed between the battery body and case. This flexible integration method adds minimal structural complexity while maintaining effective fire suppression coverage throughout the battery assembly
Solution Approach 2:
The fire-extinguishing agent is designed as a consumable safety component with a limited service life focused on emergency fire suppression. It is a relatively simple, cost-effective addition that provides critical safety functionality without requiring complex recovery or maintenance systems
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 fire-extinguishing agent effectively reduces the risk of fire by removing oxygen and stabilizing compounds, thereby enhancing the safety and stability of all-solid-state batteries.
Implementation Method 1
the fire-extinguishing agent is configured to produce a solid aerosol
Implementation Method 2
releases potassium ions to react with oxide and hydroxide ions, forming stable compounds
Data Source
AI summary
An all-solid-state battery including a battery body including a negative electrode layer, a positive electrode layer, and a solid electrolyte layer between the negative electrode layer and the positive electrode layer; a case accommodating the battery body; and a fire-extinguishing agent inside the case, wherein the fire-extinguishing agent is configured to produce a solid aerosol.