Sulfide Battery Hydrogen Sulfide Detection via Resistance Change
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The production process of all-solid lithium secondary batteries with sulfide-based solid electrolytes is complicated and costly due to the need for an additional step to form a moisture-free oxide layer, which is prone to deterioration by hydrogen sulfide generation.
Innovation Solution
Incorporating materials that chemically react with hydrogen sulfide to change electrical resistance in current collectors and leads within the battery, allowing for early detection of hydrogen sulfide generation and prevention of cell deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a moisture-free oxide layer is formed on the sulfide-based solid electrolyte material to prevent deterioration, then the reliability of the battery is improved, but the device complexity and manufacturing cost increase due to additional production steps
Solution Approach 1:
The patent extracts the detection function from the protective layer approach. Instead of adding a moisture-free oxide layer to prevent deterioration, the invention introduces a separate detection mechanism using hydrogen sulfide-sensitive materials that detect deterioration early through resistance changes, allowing prevention without the complex protective layer production steps
Solution Approach 2:
The patent uses hydrogen sulfide-sensitive materials as intermediaries between the sulfide-based solid electrolyte and the monitoring system. These materials detect hydrogen sulfide generation through resistance changes, serving as a mediator that provides early warning of deterioration without requiring direct contact or complex protective structures
2Duration of action of stationary object
If a moisture-free oxide layer is formed to prevent hydrogen sulfide generation, then the lifetime of the battery is improved, but the manufacturing cost increases due to additional production steps
Solution Approach 1:
The patent separates the detection function from the protective layer structure. By extracting the monitoring capability into a distinct detection system using hydrogen sulfide-sensitive materials, the invention extends battery lifetime through early detection without adding the complex and costly oxide layer production steps
Solution Approach 2:
The hydrogen sulfide-sensitive materials perform self-detection of deterioration conditions. The materials automatically change their electrical resistance in response to hydrogen sulfide generation, providing self-monitoring capability that extends battery lifetime without requiring complex external protective structures or additional manufacturing processes
3Measurement precision
If hydrogen sulfide detection is implemented using materials that change electrical resistance, then the measurement precision of deterioration detection is improved, but the device complexity increases due to additional components
Solution Approach 1:
The patent makes the detection system multi-functional by using hydrogen sulfide-sensitive materials that simultaneously serve as both structural components and sensing elements. The materials provide both mechanical/electrical function and detection function through their resistance changes, eliminating the need for separate dedicated sensors and reducing overall system complexity while maintaining high measurement precision
Solution Approach 2:
The hydrogen sulfide-sensitive materials perform self-detection without requiring external sensing equipment. The materials inherently change their electrical resistance in response to hydrogen sulfide concentration, providing built-in monitoring capability that achieves precise deterioration detection while minimizing additional system complexity
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
This approach simplifies the production process, reduces costs, and effectively prevents battery deterioration by detecting hydrogen sulfide through resistance changes, ensuring safe and efficient power generation.
Implementation Method 1
at least one of a current collector which constitutes a charging and discharging path, a lead which constitutes a charging and discharging path, and a lead which is connected to a circuit that is attached to the charging and discharging path, comprises a material which chemically reacts with hydrogen sulfide to change electrical resistance
Implementation Method 2
a sulfide-based solid electrolyte material is likely to react with moisture. Because of this, a battery comprising a sulfide-based solid electrolyte material has a problem that a deterioration is likely to be caused to the battery by the generation of hydrogen sulfide
Data Source
AI summary
A sulfide-based solid electrolyte cell which can efficiently detect its deterioration, a cell pack equipped with the cell, a vehicle system equipped with the cell pack, and a method for detecting hydrogen sulfide. A sulfide-based solid electrolyte cell including at least one or more power generation units each including a positive electrode, a negative electrode and an electrolyte present between the positive and negative electrodes, and a cell case which houses the power generation units, wherein at least one of the positive electrode, negative electrode and electrolyte includes a sulfur material, and wherein at least one of a current collector which constitutes a charging and discharging path, a lead which constitutes a charging and discharging path, and a lead which is connected to a circuit that is attached to the charging and discharging path, includes a material which chemically reacts with hydrogen sulfide to change electrical resistance.