Pouch Battery Degassing with Adjustable Suction and Fault Detection
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Solution Overview
Problem
Existing degassing systems for pouch-type secondary batteries face inefficiencies due to the need for a large gas pocket portion to prevent insulation damage, which increases production costs and makes it difficult to determine the appropriate size of the gas pocket portion based on varying gas generation during activation.
Innovation Solution
A degassing system that includes a separation unit with a suction passage, a gas discharge unit with a needle and gas discharge path, and a foreign substance removing unit, which allows for adjustable suction force based on pouch size, automatic detection of suction line abnormalities, and simplified configuration to reduce costs and ensure quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gas pocket portion is made large to prevent insulation damage during activation, then the reliability of sealing is improved, but the manufacturing cost increases and production efficiency decreases
Solution Approach 1:
The patent applies preliminary action by performing degassing during the activation process itself. A needle is inserted into the gas pocket portion to create a gas discharge path, allowing gas to be actively removed through suction during activation. This preliminary degassing action prevents excessive gas accumulation that would otherwise require a larger gas pocket portion, thereby maintaining sealing reliability while reducing the need for excessive material and improving production efficiency.
Solution Approach 2:
The patent changes the parameter of gas pocket portion size by implementing an active degassing system. Instead of relying on a large static gas pocket portion, the system dynamically manages gas accumulation through controlled discharge during activation. This parameter change allows the gas pocket portion to be optimized for its actual function rather than being oversized as a precaution, thus improving productivity while maintaining the necessary sealing insulation.
2Adaptability or versatility
If the gas pocket portion is made large to accommodate variable gas generation, then the adaptability to different activation conditions is improved, but the manufacturing cost increases
Solution Approach 1:
The patent applies preliminary action by establishing a gas discharge path during activation before excessive gas accumulation occurs. The needle is inserted and suction is applied to remove gas proactively, allowing the system to adapt to variable gas generation without requiring a large gas pocket portion. This approach maintains adaptability to different activation conditions while reducing material costs.
Solution Approach 2:
The patent implements self-service by allowing the activation process itself to facilitate gas removal. The activation conditions that generate gas also enable the degassing process through the needle and suction system. This self-service mechanism provides adaptability to varying gas generation without requiring additional complex structures or increasing manufacturing costs.
3Reliability
If a large gas pocket portion is used to prevent sealing insulation damage, then the reliability of the sealing portion is improved, but the loss of material increases
Solution Approach 1:
The patent applies preliminary action by removing gas during activation through the needle and suction system. This prevents excessive gas accumulation that would require a larger gas pocket portion, thereby reducing material waste while maintaining sealing insulation reliability. The gas is discharged proactively before it can cause damage.
Solution Approach 2:
The patent changes the parameter of gas pocket portion size by implementing active degassing. Instead of using a large gas pocket portion as a passive safety measure, the system actively manages gas levels during activation. This parameter change reduces the required material while maintaining the necessary sealing insulation through controlled gas removal.
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 system effectively processes gas regardless of pouch size, automatically resolves vacuum issues in the suction line, increases operational convenience by adjusting degassing time and gas amount based on pouch size, and ensures quality while lowering unit costs.
Implementation Method 1
a separation unit (10) separating a first surface (92a) and a second surface (92b) of the pouch (90), and forming a space inside of the pouch (90)
Implementation Method 2
a gas discharge unit (20) installed on the separation unit (10), piercing the pouch (90) with a needle (21) having a gas discharge path (21a) therein, and discharge gas inside of the pouch (90) through the gas discharge path (21a)
Implementation Method 3
a suction line (31, 34) removing a discharge mixed with gas flowing into the separation unit (10) and the gas discharge path (21a)
Data Source
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AI summary
A degassing system of a pouch for a secondary battery is provided. In the degassing system, after inhaling gas regardless of the size of a cell pocket, the gas may be processed, and the convenience of work may be increased by setting the period of degassing time or the amount of gas to be discharged according to the size of a pouch, and an abnormality in a suction line for degassing may be automatically detected according to a comparison value by comparing the amount of discharged gas with a reference value preset by each pouch size.