Cutting battery sheets into slices is only half the job - the freshly cut pieces then have to be cleaned. The specification of CN215432708U describes what that meant on the production floor before this patent: the cutting machines in use could not clean the cut pieces themselves, so a separate cleaning machine had to stand next to each cutting machine. Machines piled together, the work area stayed dirty, and the footprint grew.

CN215432708U, filed on 26 August 2021 and granted on 7 January 2022, closes that gap inside a single machine. Stacked sheets are picked up one by one by a vacuum carriage, conveyed to a set of tungsten-carbide vertical cutters, and the slices then fall directly into an ultrasonic cleaning cavity built into the same body - clean slices come out of one continuous flow.

Patent Information

The Production Problem This Patent Solves

Cutting machines could not clean their own output. Before this patent, cutting machines for lithium battery sheets had no way to clean the cut pieces, so factories had to install separate cleaning machines. The specification lists the consequences directly: machines piled together, a dirty and disorderly work area, and excessive floor space taken up.

The flow had to stay continuous. Sending every batch of cut slices to an external cleaner breaks the material flow and adds handling. The patent's aim, in its own words, is a cutting machine that provides cleaning itself so the cutting operation stays continuous.

How the Mechanism Works

Machine body and sheet supply (claim 1)

The machine main body is a rectangular box open at the top and on one side, with the top opening reaching only a quarter of the body depth. A lifting seat inside the top opening rises and falls on four lifting columns driven by a push-rod motor, carrying the stack of sheets to be cut. A fixed slide leads from the lifting seat down to the start of the conveyor. Two retractable power plugs stored in notches at the rear power the ultrasonic cavity and the rest of the machine separately; four support legs with anti-skid sleeves stand the body on the floor.

Vacuum sheet transfer (claims 3 and 4)

Above the seat stands an n-shaped vacuum carriage, welded to the body, with wiring routed internally. Three moving columns hang from its cross plate; each ends in a detection suction plate fitted with a distance sensor. The columns travel back and forth in their guide grooves under electrically controlled moving rods. As the lifting seat raises the stack, the sensors position the plates over the top sheet, and a vacuum pump - detachably mounted on top of the carriage, with an all-copper core and five vacuum tubes to a fixing plate - holds exactly one sheet to the plates. The carriage then carries that sheet to the conveyor.

Conveying and feeding to the cutters (claim 5)

Two combined conveyor-roller boxes - the rear one powered by a transmission motor, the front one driven - hold ten conveyor rollers between them that move the sheet forward only. A push plate of bidirectional crawler design sits beyond the rollers, starting with a pusher column fitted with a sensor: once the sheet has fully entered the push plate, the column advances to push the sheet against the cutters and then returns to its start position. A garbage recovery drawer one third of the body depth, with a stainless-steel round handle, sits under the joint between the conveyor boxes and the push plate to catch residues shed during transport.

Tungsten-carbide cutters on an interchangeable plate (claim 6)

At the end of the push plate, a combined cutter plate carries three tungsten-carbide vertical cutters formed integrally with the plate. The cutter plate is detachably connected and interchangeable cutter sets are supplied, so different sheet sizes are cut by swapping the plate rather than rebuilding the machine.

Ultrasonic cleaning, draining and drying (claims 6 and 7)

Cut slices drop straight from the cutter plate into the ultrasonic cleaning cavity. Inside the cavity, a large fluted rolling shaft - its tines aligned with the cutter drop point - tumbles the slices through the cleaning bath, then a small fluted shaft aligned with the draining notch flips them out through the notch into a removable draining box fixed by two large bolts. The draining box has a floor densely pierced with leak holes and lined with water-absorbing cotton, so slices leave the machine rinsed and drained. A dedicated cleaning control panel with an LED progress display and start, pause and keypad controls runs the wash cycle.

OLED touch control (claim 8)

An OLED touch panel at the geometric centre of the left face shows each sheet's position and the running state of every device. Below it an operation key panel and dedicated keys for the lifting seat, the vacuum pump and the conveyor rollers, together with an intelligent control module in the body, give the operator single-point control of the automatic feeding, cutting and cleaning sequence.

Working cycle

A stack of sheets is placed on the lifting seat. The vacuum carriage moves over the seat, the seat rises, and the vacuum pump holds one sheet to the suction plates. The carriage lays the sheet on the conveyor rollers, which carry it onto the push plate; the pusher column then advances the sheet against the tungsten-carbide cutters. Each slice falls into the ultrasonic cavity, where the fluted shafts tumble it through the wash and pass it out through the draining notch into the draining box - clean, in one continuous flow.

Claimed Benefits

How It Compares with Separate Cutting and Cleaning Lines

Before this patent, cutting machines for lithium battery sheets had no way to clean their own output, so factories installed separate cleaning machines: machines piled together, a dirty work area and excessive floor space. Here the cut slices drop straight into an ultrasonic cleaning cavity under the cutter plate.

Where This Technology Is Used Today

This patent protects the combined cut-and-clean architecture of TOB's battery sheet cutting machines. The flow it covers - vacuum sheet feed, tungsten-carbide cutting, in-machine ultrasonic cleaning and draining - is how our cutting equipment keeps cut sheets clean without adding floor space.

• Laboratory automatic electrode die cutter machine
• Automatic shear cutter machine for lithium-ion battery electrode cutting
• Sodium-ion battery electrode automatic cutting machine

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Full specification and drawings: CN215432708U on Google Patents

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