Battery foil special large unwinding and slitting machine

By using a dedicated large-roll slitting machine for battery foil, large rolls of battery foil can be slitted into smaller rolls of finished battery foil in one go, solving the problems of low production efficiency, low yield, and high loss in existing technologies, and improving the quality and production stability of battery foil.

CN116281342BActive Publication Date: 2026-05-26LUOYANG INST OF SCI & TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
LUOYANG INST OF SCI & TECH
Filing Date
2023-03-27
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

In the existing technology, the battery foil production process requires processing on two slitting machines, resulting in low production efficiency, low yield and large losses, and poor edge quality of the semi-finished small rolls of battery foil.

Method used

A dedicated large-roll slitting machine for battery foil is used, which combines components such as an uncoiler, a bridge device, slitting cutters, a slotting shaft, and a winding mechanism to directly slit large rolls of battery foil into small rolls of finished battery foil in one go. The synchronous movement and adjustment of the face pressure roller and the support roller improve the winding stability and the quality of the finished product.

Benefits of technology

This technology enables the direct slitting of large rolls of battery foil into smaller rolls of finished battery foil, improving production efficiency, increasing yield, reducing losses, and enhancing the edge quality and winding stability of the finished battery foil.

✦ Generated by Eureka AI based on patent content.

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    Figure CN116281342B_ABST
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Abstract

A large-coil slitting machine for battery foil includes an uncoiler, a bridging device and a slitting cutter on one side of the uncoiler. The bridging device includes multiple guide rollers that bring the battery foil strip closer to the slitting cutter from top to bottom. A slotting shaft is located on the other side of the bridging device, with the slitting cutter positioned diagonally below the slotting shaft. A winding mechanism is located on the other side of the slotting shaft. The winding mechanism includes a roll for winding the finished battery foil strip. A face pressure roller and a support roller are movably positioned on the outside of the roll to abut against the finished battery foil roll on the roll. The face pressure roller and support roller move radially towards the roll. This invention can directly slit large rolls of battery foil rolled by a mill into smaller rolls of finished battery foil. The battery foil strip runs from top to bottom to the slitting cutter, achieving bottom-up slitting of the battery foil. The face pressure roller and support roller are constantly pressed against the outer surface of the finished battery foil roll, which helps improve the quality of the finished battery foil roll and the stability of the roll operation, thereby improving the stability of the unit operation.
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