Battery Pressing Apparatus Synchronizing Roller and Transport Speed
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Solution Overview
Problem
Existing battery pressing methods using rollers create a speed differential between the rollers and the battery cell, leading to unbalanced forces and layer shifting during the pressing process, which can result in incomplete gas and air removal from the battery element.
Innovation Solution
A battery press device and method where the rollers' rotational speed is synchronized with the transport speed of the battery cell, ensuring that the pressing forces act uniformly across the battery element, preventing layer shifting and allowing for effective impregnation of the electrolyte.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the battery cell is pressed by rotating rollers during manufacturing, then gas and air are pressed out of the battery element, but layer shifting occurs due to speed differential between rollers and battery cell
Solution Approach 1:
The patent applies dynamics by making the transport speed of the battery cell variable and synchronized with the rotational speed of the rollers. The control unit dynamically adjusts the transport speed to match the roller surface speed, ensuring that the battery cell moves at the same velocity as the roller surface. This dynamic speed matching eliminates the speed differential that causes layer shifting while maintaining effective pressing action to remove gas and air from the battery element.
2Reliability
If the battery cell is pressed by rotating rollers, then electrolyte impregnation is enhanced, but unbalanced forces cause layer shifting of the battery element
Solution Approach 1:
The control unit dynamically synchronizes the transport speed of the battery cell with the rotational speed of the rollers, ensuring both move at matching velocities during pressing. This dynamic speed coordination eliminates unbalanced forces that would otherwise disrupt the layered structure of the battery element, while still allowing effective electrolyte impregnation to occur through the pressing action.
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 synchronization of rotational and transport speeds prevents unbalanced forces, eliminating layer shifting and enabling efficient removal of gas and air within the battery element, ensuring complete electrolyte impregnation during the pressing process.
Implementation Method 1
The rollers (72, 72') rotate while pressing a battery cell (10)
Data Source
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AI summary
[Problem] To provide a battery pressing device whereby a battery cell can be roller-pressed without layer shifting. [Solution] The battery pressing device 50 has a roller 72 that rotates while pressing a battery cell 10 in which is disposed a battery element 15 having electrodes and separators layered inside an external packaging 13, and a transport mechanism 60 that transports the battery cell 10 at a speed that is synchronized with the rotational speed of the roller 72 when the battery cell 10 is to be pressed by the roller 72.