Pole piece roller compression machine

Abstract

The invention discloses a pole piece roller compression machine which comprises an unrolling mechanism, a delivery mechanism, a roller compression mechanism and a rolling mechanism. The roller compression mechanism comprises an upper compression roller and a lower compression roller which are oppositely arranged and a compression roller driving mechanism used for driving the upper compression roller and the lower compression roller to move relatively to conduct roller compression. The roller compression mechanism further comprises an inverse driving mechanism coupled to the upper compression roller and/ or the lower compression roller. The inverse driving mechanism controllably applies action force with direction opposite to the compression roller drawing close direction on the upper compression roller and/ or the lower compression roller to remove or weaken compression roller shock. The pole piece roller compression machine enables the two compression rollers to maintain stable in interval change, and avoids undesirable change in compression of pole pieces by rollers, so that the machine can improve roller compression quality and prolong service life of devices.

Description

Technical field [0001] The invention relates to a battery pole piece production equipment, in particular to a roller press for rolling a coated pole piece. Background technique [0002] The preparation of lithium battery pole pieces is generally to first coat a mixture of active materials and various additives on the substrate. The coated substrate is rolled to form pole pieces. The roll forming process of the pole pieces affects the thickness of the pole pieces. Uniformity and thickness, etc., in turn affect the performance of the battery, so higher requirements on the roller press. The industry's research on this technology has never stopped. [0003] Chinese patent document 200810054790.6 discloses a hydraulic servo battery pole piece rolling mill, which adopts a hydraulic cylinder for pressing down on the bearing housing where the pressure roller is installed, and the bending hydraulic pressure for adjusting the gap between the two rollers is installed outside the bearing hous...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent document 200810054790.6 discloses a hydraulic servo battery pole piece rolling mill, which uses a servo hydraulic cylinder connected to the bearing seat on which the pressure roller is installed, and a bending hydraulic pressure roller for adjusting the gap between the two rollers is installed on the outside of the bearing seat of the upper roller and the lower roller. The cylinder realizes the adjustment of the gap between the two rollers, but this structure is prone to vibration when rolling the gap-coated pole piece. For example, due to the change in the thickness of the gap-coated pole piece, there The position will cause the two rollers to vibrate greatly, so the pressure balance of the upper and lower rollers cannot be achieved, which will affect the quality of the pole piece rolling, and affect the service life and life of the equipment

However, this technology cannot realize online thickness measurement of the pole piece, the measurement efficiency is low, and the thickness measurement is done with a digital dial gauge, which is easy to damage the pole piece and affect the quality of the battery

[0005] In addition, the existing heating rollers generally use electric heating, and the electric heating is not uniform, while oil heating is rarely used.

Chinese patent document 201010589992.8 discloses a heat conduction oil heating roller, which adopts an oil heating structure with a roller shaft and a bushing, and an oil passage composed of a spiral groove is arranged on the outer circumference of the roller shaft, and the bushing is sleeved on the outer circumference of the roller shaft , the oil circuit is a two-way oil circuit. This structure increases the effective width of the roll surface of the roller shaft, but its oil cycle performance is poor, and the structural rigidity of the shaft sleeve and the roller shaft is worse than that of the integral structure.

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