Intermediate Plate Load Sensing for H2S Detection in Battery Modules
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Solution Overview
Problem
Existing battery systems cannot detect the generation of hydrogen sulfide gas until it fills the battery case and increases pressure, making it difficult to prevent hydrogen sulfide accumulation.
Innovation Solution
Incorporating a sulfide-based all-solid-state battery unit cell with an intermediate plate and a detection unit, such as a strain gauge, to estimate hydrogen sulfide generation based on changes in load applied to the intermediate plate, allowing for early detection before gas accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure in the battery case or hydrogen sulfide concentration in the battery case is detected, then hydrogen sulfide gas generation is detected, but detection can only occur after the battery case is filled with hydrogen sulfide gas
Solution Approach 1:
The battery module is divided into multiple unit cells, and an intermediate plate with a detection unit is disposed between stacked unit cells. This segmentation allows detection of hydrogen sulfide generation at the unit cell level before the gas accumulates to fill the entire battery case, enabling earlier detection.
Solution Approach 2:
The detection approach transitions from monitoring the entire battery case (macro level) to monitoring individual unit cells through the intermediate plate (micro level). This dimensional change enables detection of localized hydrogen sulfide generation before it propagates to fill the whole case.
2Measurement precision
If an intermediate plate with detection unit is disposed between stacked unit cells, then hydrogen sulfide generation can be detected early, but device complexity increases
Solution Approach 1:
The intermediate plate serves multiple functions: it provides structural support between stacked unit cells, acts as a mounting platform for the detection unit, and enables early detection of hydrogen sulfide generation. This multi-functionality reduces the need for separate components.
Solution Approach 2:
The detection unit is integrated with the intermediate plate structure, merging the detection function with the structural support function. This combination reduces overall device complexity compared to having separate detection and support structures.
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
Enables the detection of hydrogen sulfide generation before it fills the battery case, improving safety and preventing pressure increases by identifying the source of hydrogen sulfide within the battery module.
Implementation Method 1
The detection unit is a strain gauge provided on the intermediate plate
Implementation Method 2
the intermediate plate is fixed to a base member in a cantilevered state... the intermediate plate bends with the fixed end as a support point
Data Source
AI summary
A battery system includes a unit cell including a sulfide-based all-solid-state battery, a battery module in which a plurality of the unit cells is stacked between a pair of restraining members, an intermediate plate disposed between the stacked unit cells, a detection unit configured to detect a load applied to the intermediate plate, and an estimation unit configured to estimate generation of hydrogen sulfide in the unit cell, based on a change in load applied to the intermediate plate.