Lithium-Ion Battery Electrode Sheet Manufacturing with Guide Member
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Solution Overview
Problem
Existing methods for manufacturing lithium-ion secondary battery electrode sheets face challenges in forming a layer of active material particles on a current collector with high accuracy, leading to inconsistencies in the electrode layer thickness and adhesion.
Innovation Solution
A method involving a strip-shaped current collector coated with a binder solution, followed by precise feeding and shaping of granulated particles using a squeegee member, with a guide member to control the powder distribution and ensure accurate placement and uniform thickness of the active material layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If powder material is fed directly onto the current collector without precise positioning, then the feeding process is simple, but the manufacturing precision of the active material layer is poor
Solution Approach 1:
A guide member is introduced as an intermediary component between the powder material source and the current collector. The guide member includes a guide surface that directs the powder material along a controlled path to the target position, ensuring precise placement without requiring complex positioning mechanisms. The guide member acts as a simple yet effective mediator that transforms uncontrolled powder dispersion into directed material deposition.
2Manufacturing precision
If the gap between current collector and squeegee member is large, then the shaping process is easier, but the manufacturing precision and uniformity of the active material layer deteriorate
Solution Approach 1:
The guide member performs preliminary action by directing and positioning the powder material onto the current collector before the squeegee member applies pressure. This preliminary positioning ensures that the powder material is already aligned and distributed correctly, so that when the squeegee member subsequently presses the material, it can achieve uniform thickness with a smaller gap, thereby improving manufacturing precision without significantly increasing process difficulty.
3Manufacturing precision
If powder material is fed at a position far from the squeegee member, then the feeding operation is simpler, but the adhesion and uniformity of the active material layer are poor
Solution Approach 1:
The guide member serves as an intermediary that extends the reach of the powder feeding operation closer to the squeegee member without requiring the feeding mechanism itself to be repositioned. The guide surface of the guide member channels the powder material along a trajectory that delivers it to the optimal location near the squeegee member, ensuring both good adhesion and ease of operation.
Data Source
AI summary
A method of manufacturing a lithium-ion secondary battery electrode sheet includes the steps of: conveying a current collector (11) coated with a binder solution (12); feeding a powder material (13) of granulated particles (13a) onto the current collector (11) while guiding the powder material (13) of the granulated particles (13a) toward a gap between the current collector (11) and a squeegee member (25) disposed so as to be spaced with the gap from the current collector (11) being conveyed; and shaping the powder material (13) of the granulated particles (13a) fed on the current collector (11) by using a squeegee member (25).