Battery Gas Sampling with Variable Diffusion Volume Control
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Solution Overview
Problem
Existing gas analysis systems for secondary batteries face challenges in accurately analyzing gases generated inside lithium secondary batteries due to low gas concentrations, which are influenced by the volume of gas flow paths and diffusion spaces, making precise quantitative analysis difficult.
Innovation Solution
A gas collecting apparatus with a variable gas diffusion space and fixed gas sampling space, controlled by a control unit, adjusts gas concentration and diffusion speed to optimize sampling for analysis, using a gas extraction unit, diffusion unit, and sampling unit to manage gas flow and concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the volume of gas flow path is increased to improve gas sampling, then the gas concentration decreases, making accurate analysis difficult
Solution Approach 1:
The gas collection system is divided into multiple separate components: a gas extraction unit with extraction chamber, a gas diffusion unit with diffusion chamber, and a sampling unit with sampling chamber. This segmentation allows each component to have a specific function and controlled volume, preventing the gas concentration from being diluted across a large continuous flow path while still enabling sufficient gas collection and diffusion for analysis.
2Volume of moving object
If the volume of gas diffusion space is increased to improve gas diffusion, then the gas concentration decreases, affecting analysis accuracy
Solution Approach 1:
The gas diffusion unit incorporates a movable plate that can adjust the volume of the diffusion chamber dynamically. This allows the diffusion space to be optimized for different sampling needs - sufficiently large to enable effective gas diffusion from the extraction chamber, but controllable to maintain appropriate gas concentration levels for accurate analysis in the sampling chamber.
3Device complexity
If fixed volume gas flow paths are used, then system complexity is reduced, but gas concentration cannot be optimized for analysis
Solution Approach 1:
The system employs movable plates in both the extraction unit and diffusion unit that can be controlled to adjust chamber volumes. This dynamic adjustment capability allows optimization of gas concentration for analysis while maintaining relatively simple structural designs using basic mechanical components like movable plates and seals, rather than complex fixed-volume 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 apparatus enables accurate and optimized sampling of gases inside secondary batteries by controlling gas diffusion and concentration, improving the precision of gas analysis.
Implementation Method 1
a gas diffusion unit having a gas diffusion space configured to receive and diffuse the extracted gas from the gas extraction unit
Data Source
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AI summary
Disclosed is a gas collecting apparatus comprising: a gas extraction unit configured to extract gas from an analysis target battery; a gas diffusion unit having a gas diffusion space with a variable volume and configured to receive and diffuse the extracted gas from the gas extraction unit; a sampling unit having a gas sampling space configured to receive and sample the diffused gas from the gas diffusion unit; and a control unit configured to control the gas diffusion unit to adjust a volume of the gas diffusion space, wherein a volume of the gas sampling space is fixed.