Pouch Cell Sealing Tool With Pressure Feedback for Uniform Seals
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Solution Overview
Problem
Pouch type battery cells experience pressure deviation during sealing, leading to deteriorated sealing quality due to misalignment between the battery and the sealing tool, resulting in potential venting issues.
Innovation Solution
A battery cell manufacturing device equipped with a sealing tool featuring a first and second sealing surface, each with a pressure sensor, to ensure consistent pressure application across the battery case, reducing pressure deviation and improving sealing quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure is applied to seal the pouch type battery case, then sealing is achieved, but pressure deviation occurs due to position misalignment between the battery and sealing tool
Solution Approach 1:
The sealing tool incorporates multiple pressure sensors at different positions (first pressure sensor at the center, second and third pressure sensors at side positions) to detect local pressure variations. This allows the system to identify and compensate for position-dependent pressure deviations, ensuring uniform sealing quality across the entire sealing surface despite misalignment between the battery and sealing tool.
Solution Approach 2:
The system uses pressure sensors to provide real-time feedback on the actual pressure distribution during sealing. The controller receives signals from these sensors and adjusts the pressing force accordingly to maintain uniform pressure across the sealing surface, compensating for any position misalignment and ensuring consistent sealing quality.
2Adaptability or versatility
If the position between the pouch type battery and sealing tool is deviated, then sealing operation can still be performed, but sealing quality deteriorates in some outer peripheral surfaces
Solution Approach 1:
Multiple pressure sensors are strategically positioned at the center and side positions of the sealing tool to detect local pressure variations caused by position deviation. This enables the system to identify which specific areas are under- or over-pressured and adjust accordingly, maintaining sealing quality even when the battery position deviates from the ideal alignment.
Solution Approach 2:
The system dynamically adjusts the pressing force parameters based on feedback from pressure sensors. When position deviation is detected, the controller modifies the pressure distribution to compensate, ensuring that the sealing quality remains consistent across different positions of the battery case.
3Reliability
If pressure is applied to seal the battery case, then the sealing part is sealed, but pressure deviation leads to potential venting issues
Solution Approach 1:
Pressure sensors provide continuous feedback on the pressure distribution during sealing. The controller uses this information to ensure uniform pressure application, preventing localized under-pressure areas that could lead to improper sealing and subsequent venting issues. This feedback mechanism ensures that the entire sealing surface achieves adequate sealing integrity.
Solution Approach 2:
The system proactively compensates for potential pressure deviations by using pressure sensor feedback to adjust pressing force before sealing defects occur. By detecting and correcting pressure non-uniformities during the sealing process, the system prevents the formation of weak sealing points that could lead to venting problems.
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 device effectively reduces pressure deviation during the sealing process, enhancing the sealing quality and preventing early venting phenomena by ensuring uniform pressure distribution across the battery case, even when the electrode lead and lead film are misaligned.
Implementation Method 1
the sealing tool has at least one pressure sensor located on the sealing surface
Implementation Method 2
pressure and heat are applied to an outer peripheral surface of the pouch type case by a sealing tool to seal the case
Data Source
AI summary
A battery cell manufacturing device according to one embodiment of the present disclosure includes a sealing tool that presses a sealing part, in a battery case including a sealing part having a structure in which an electrode assembly is mounted onto a receiving part, and an outer peripheral surface is sealed by heat fusion, wherein the sealing tool comprises a first sealing tool located at an upper part and a second sealing tool located at a lower part with respect to the battery case, and wherein the sealing tool comprises a sealing surface in contact with the sealing part, and at least one pressure sensor is located on the sealing surface.