Elastic Pressing Units for Uniform Secondary Battery Activation
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Solution Overview
Problem
Existing secondary battery activation devices fail to uniformly pressurize battery cells, leading to gas trapping at thin regions during the activation process, resulting in non-uniform charging.
Innovation Solution
The secondary battery activation device employs upper and lower pressing units with elastic members and pressing blocks of varying sizes and shapes to ensure uniform pressure across the battery cell, preventing gas trapping by adapting to local thickness variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If plate-shaped pressing plates are used to press the secondary battery, then the activation process can be performed, but gas becomes trapped at thin regions causing non-uniform charging
Solution Approach 1:
The pressing plates are divided into multiple pressing members that can independently apply pressure to different regions of the battery. This segmentation allows each pressing member to adapt to local thickness variations, ensuring uniform pressure distribution across the entire battery surface and preventing gas trapping in thin regions.
Solution Approach 2:
The pressing members are designed with different pressing forces or configurations suitable for different regions of the battery. Regions with thinner electrodes receive adjusted pressing forces compared to thicker regions, ensuring that gas is effectively removed from all areas without causing damage to sensitive components.
2Productivity
If high temperature pressurization is applied during activation, then gas generation can be accelerated, but gas becomes trapped in thin regions due to insufficient pressing force transmission
Solution Approach 1:
The pressing members are designed to dynamically adjust their pressing forces based on real-time feedback from pressure sensors. This dynamic adjustment ensures that high temperature pressurization effectively accelerates gas generation while maintaining uniform pressure distribution, preventing gas trapping in thin regions during rapid activation.
Solution Approach 2:
Pressure sensors are integrated into the pressing members to provide real-time feedback on pressure distribution. This feedback mechanism allows the control system to adjust pressing forces dynamically, ensuring that high temperature pressurization achieves both rapid activation and uniform pressure distribution without gas trapping.
3Ease of manufacture
If uniform pressing force is applied across the entire battery, then manufacturing is simple, but gas trapping occurs in thin regions where pressing force is insufficient
Solution Approach 1:
The pressing mechanism is segmented into multiple independently controllable pressing members, each capable of applying customized pressing forces to different regions. This segmentation maintains manufacturing simplicity while significantly improving gas removal effectiveness in thin regions through localized pressure adjustment.
Solution Approach 2:
The pressing members are equipped with sensors and control systems that enable them to automatically detect and adapt to local battery thickness variations. This self-service capability allows the system to maintain uniform pressure distribution and effective gas removal without complex external control mechanisms.
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
This solution allows for uniform activation and gas removal without local trapping, ensuring a uniformly charged secondary battery is manufactured.
Implementation Method 1
upper and lower pressing units, each comprising a plate-shaped pressing plate and a plurality of elastic members extending from one surface of the pressing plate toward the other surface
Data Source
AI summary
A secondary battery activation device capable of effectively removing gas generated inside a secondary battery cell during an activation process of a secondary battery and a secondary battery manufacturing method using the same are provided. The secondary battery activation device includes a first pressing unit comprising a first pressing plate and a plurality of first elastic pressing members located on a first surface of the first pressing plate, and a second pressing unit comprising a second pressing plate and a plurality of second elastic pressing members located on a second surface of the second pressing plate, the second surface of the second pressing plate being arranged to face the first surface of the first pressing plate.