Pouch Battery Pressure Measurement Component
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Solution Overview
Problem
Conventional methods for measuring pressure changes in pouch type batteries are inaccurate due to vaporization of dissolved gases and electrolytes when the battery is placed in a vacuum, making it difficult to assess battery characteristics like lifetime and storage from the initial assembly stage.
Innovation Solution
A component comprising a connecting pipe, first and second fixing units, and a third fixing unit, which allows direct or indirect connection to a pressure gauge, installed on the exterior layer of the pouch type battery, enabling accurate measurement of pressure changes and gas sampling during the initial cell assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the battery is placed in a vacuum box to measure pressure change, then the pressure change can be measured by collecting inner gas, but dissolved gas is vaporized and electrolyte is vaporized making it difficult to know actual pressure change
Solution Approach 1:
The patent applies preliminary action by pre-installing a pressure measurement component with a penetration part and sealing part onto the battery exterior layer during the initial cell assembly process. This allows pressure measurement to be conducted without placing the battery in a vacuum box, thereby preventing vaporization of dissolved gas and electrolyte while maintaining measurement accuracy.
2Measurement precision
If a pressure measurement component is installed on the battery exterior layer, then accurate pressure measurement and gas sampling are enabled from initial assembly stage, but the device structure becomes more complex
Solution Approach 1:
The patent merges multiple functions into a single integrated pressure measurement component. The component combines a penetration part (through which pressure is measured), a sealing part (to seal around the penetration part), and a gas sampling capability within one unified structure. This reduces the number of separate components needed while maintaining measurement accuracy and enabling gas sampling.
Solution Approach 2:
The pressure measurement component is designed with multi-functionality, serving both as a pressure measurement device and a gas sampling device. The penetration part allows both pressure transmission and gas extraction, while the sealing part ensures proper sealing for both functions. This universal design eliminates the need for separate measurement and sampling systems.
3Measurement precision
If the penetration part is in direct contact with the interior of the battery, then pressure can be transmitted to the pressure gauge, but the exterior layer integrity is compromised
Solution Approach 1:
The patent uses the penetration part as an intermediary element that transmits pressure from the battery interior to the pressure gauge without compromising exterior layer integrity. The penetration part passes through the exterior layer and is sealed by the sealing part, creating a controlled pathway for pressure transmission while maintaining the structural integrity and sealing of the battery exterior.
Data Source
AI summary
The present invention relates to a component for measuring a pressure change in a pouch-type battery, and a method for measuring a pressure change in a pouch-type battery by using the same and, particularly, to: a component connectable to pressure gauge by being mounted in a pouch-type battery for measuring a pressure change in the pouch-type battery; and a method for measuring a pressure change in a pouch-type battery by using the same.