Electrode plate cutting apparatus and electrode plate cutting method

The electrode plate cutting apparatus addresses the issue of deterioration during cutting by using a slit blade with heat-generating and shielding components to control temperature, ensuring minimal peeling and oxidation, thereby preserving battery integrity.

JP2026096762APending Publication Date: 2026-06-15TOYOTA BATTERY CO LTD
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Patent Information

Application Number
JP2024210592
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-12-03
Publication Date
2026-06-15

AI Technical Summary

Technical Problem

Conventional electrode plate cutting methods cause deterioration of the electrode plate due to heating, leading to oxidation of the current collector foil and alteration of the composite layer, which affects battery performance.

Method used

An electrode plate cutting apparatus with a disc-shaped slit blade that includes a heat-generating part, a heat-transferring member, and a heat-shielding member, featuring annular cutting surfaces and unheated portions to minimize heat transfer to the electrode plate, thereby reducing temperature rise and peeling of the composite layer.

Benefits of technology

The apparatus effectively cuts electrode plates while suppressing deterioration, minimizing peeling and oxidation of the composite layer and current collector foil, thus maintaining battery performance.

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Abstract

The present invention provides an electrode plate cutting apparatus and an electrode plate cutting method that can cut electrode plates while suppressing deterioration of the electrode plates during cutting. [Solution] The electrode plate cutting device 1 according to the disclosed technology is a device that cuts an electrode plate while rotating disc-shaped slit blades 2 and 3 around an axis. The slit blades 2 and 3 have a heat-generating part 21, a heat-transferring member 22 that receives heat from the heat-generating part, and a heat-shielding member 23 that is held by the heat-transferring member and is made of a material with lower thermal conductivity than the heat-transferring member. An annular cutting surface 24 is formed on both sides over the entire circumference of the radially outer side of the heat-generating part, where the heat-transferring member contacts the electrode plate to be cut. A non-heated part 25 is provided surrounding the heat-generating part, in which the heat-shielding member is exposed in a portion inside the outermost edge of the annular cutting surface.
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