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High voltage discharge processing device for metal foil surface treatment

A high-voltage discharge and surface treatment technology, which is applied to the surface coating device, surface pretreatment, electrode manufacturing, etc., can solve the problem of affecting the electrical parameters of the pole piece, the metal foil adhesion is not strong, and the fast wide width cannot be realized. Problems such as double-sided sleeve coating to achieve the effect of reducing battery internal resistance, reducing thermal effects, and reducing the increase in dynamic internal resistance

Active Publication Date: 2018-01-26
陕西浩合机械有限责任公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The Chinese patent "Lithium Battery Pole Coating Machine (201320299315.1)" discloses a lithium battery pole piece coating machine, which consists of a pole piece unwinding device, a tension adjusting device, a slurry coating device, a drying device and a collecting device. The existing problem is that the conventional coating machine scheme cannot achieve fast wide-width and double-sided coating, and the adhesion of functional materials to the metal foil is not strong, which affects the electrical parameters of the pole piece.

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  • High voltage discharge processing device for metal foil surface treatment
  • High voltage discharge processing device for metal foil surface treatment
  • High voltage discharge processing device for metal foil surface treatment

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Embodiment Construction

[0031] The present invention will be described in detail below by taking a wide-width pole piece double-sided sleeve coating machine for power batteries / supercapacitors as an example.

[0032] The double-sided sleeve coating machine for wide-width pole pieces for power batteries / supercapacitors is to coat the dispersed nano-conductive graphite and carbon-coated particles uniformly and delicately, with the positions of the front and back sides corresponding, and one-time coating on aluminum foil or copper foil , In high-energy storage equipment such as large-capacity power batteries and super capacitors, especially power batteries / supercapacitors that require short charging time, large power storage capacity, and long cycle life have made a leap in technology.

[0033] Such as figure 1 As shown, the coating machine of the present invention includes a lower drying tunnel 51 arranged above the frame structure, an upper drying tunnel 52 and an unwinding unit arranged below the fra...

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Abstract

The invention discloses a high voltage discharge processing device for metal foil surface treatment. The device includes high voltage boxes, negative pressure air extraction apparatuses, high voltagesources and several strip discharge electrodes. The metal foil is wound on high voltage discharge rollers, the discharge electrodes are disposed at the front ends of the high voltage boxes' openings,and are arranged around the high voltage discharge rollers parallelly along the axes of the high voltage discharge rollers. An interval is kept between the discharge electrodes and the metal foil to generate arcing to the metal foil, so that pits and bumps can be produced on the metal foil surface. The rear ends of the high voltage boxes are equipped with negative pressure air outlets, which are According to the high voltage discharge processing device provided by the invention, real-time on-line surface high voltage discharge etching and roughening treatment are carried out on a substrate, and uniformly distributed pits with equivalent size to coated nano graphite or carbon particles are formed on the front and back surface of the metal foil, thus improving the adhesive ability of a coating material on the metal foil surface.

Description

technical field [0001] The invention belongs to the technical field of power batteries / supercapacitors, and in particular relates to a pole piece double-sided positioning coating machine, in particular to a high-voltage discharge treatment device for metal foil surface treatment. Background technique [0002] Power batteries and supercapacitors are widely used in the field of new energy technology. In power batteries and supercapacitors, the pole piece of the electrode is a key component. Coating machines are usually required to evenly coat functional materials on metal foil (copper foil or aluminum foil) On the surface. The principle of a common coating machine is similar to a gravure printing machine. The rolled substrate is conveyed to the coating printing area through the transmission mechanism, and the functional material is coated on the designated position on the surface of the substrate, and then dried, wound, etc., used in the production of subsequent products. Am...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01G11/86B05D3/00
CPCY02E60/10
Inventor 张浩合
Owner 陕西浩合机械有限责任公司
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