Dual-Rotor Cleaner Head for Selective Fiber Removal
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Solution Overview
Problem
Existing methods for forming a separator-integrated electrode group in secondary batteries face challenges in accurately removing organic fiber from current collecting tabs without removing it from active material-supported areas, leading to inefficient processing.
Innovation Solution
A cleaner head with a first rotor and a second rotor, where the second rotor rotates together with the first rotor but remains non-contact with the sheet, and a contact surface removes the organic fiber caught on the second rotor, ensuring precise removal only from the desired areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rotating brush is used to remove organic fiber from the sheet, then the organic fiber can be removed from the current collecting tab area, but it is difficult to prevent removal from the active material-supported area
Solution Approach 1:
The rotating brush is divided into multiple brush units arranged in the radial direction, with each brush unit having a different rotational radius. This segmentation allows different parts of the brush to reach different areas of the current collector, enabling selective removal of organic fiber from the current collecting tab area while avoiding the active material-supported area.
Solution Approach 2:
Different brush units are positioned at different radial distances from the rotation center, creating local variations in the brush's interaction with the sheet. The brush units closer to the rotation center (with smaller rotational radii) contact the current collecting tab area for fiber removal, while brush units farther away do not reach the active material-supported area, thus achieving localized selective removal.
2Productivity
If the brush bristles contact the entire sheet surface, then organic fiber removal is comprehensive, but damage to the active material-supported area increases
Solution Approach 1:
The brush is segmented into multiple independent brush units that can be positioned at different radial distances. This allows the brush to contact only specific areas of the sheet (current collecting tab area) while avoiding other areas (active material-supported area), reducing comprehensive contact and associated damage risk.
Solution Approach 2:
The harmful contact between the brush and the active material-supported area is extracted or eliminated by carefully designing the brush's rotational radius and brush unit positions. Only the necessary contact with the current collecting tab area is maintained, while contact with the active material-supported area is completely avoided.
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
Effectively removes organic fiber only from the current collecting tabs while preventing removal from active material-supported areas, enhancing the processing efficiency and accuracy of the electrode group formation.
Implementation Method 1
a first rotor 15 that is rotationally driven in a state where an outer peripheral surface 21 of the first rotor 15 is in contact with the sheet 53; removing a part of the sheet 53 from the base 52 by rotationally driving the first rotor 15
Implementation Method 2
a second rotor 16A, 16B that is arranged next to the first rotor 15 in a direction along a rotation axis R of the first rotor 15; the second rotor 16A, 16B is rotated together with the first rotor 15
Data Source
AI summary
According to one embodiment, a cleaner head includes a first rotor, a second rotor, and a contact surface. The first rotor can be rotationally driven in a state where an outer peripheral surface of the first rotor is in contact with a sheet that includes organic fiber and is formed on a base, and can remove a part of the sheet from the base. The second rotor is arranged next to the first rotor in a direction along a rotation axis of the first rotor, and is rotated together with the first rotor in a state where the second rotor is not in contact with the sheet. The contact surface is in contact with an outer peripheral surface of the second rotor at a position away from the sheet around the rotation axis.