Novel ball milling device

Abstract

The invention discloses a novel ball milling device. The novel ball milling device comprises a ball milling device main body. A chamber (4) of the ball milling device main body is connected to an electro connecting pressure gauge (2) and a solenoid valve (1) in series by an exhaust pipe (3). The electro connecting pressure gauge (2) is connected to a control circuit of the solenoid valve (1). The electro connecting pressure gauge of the novel ball milling device monitors ball mill cavity pressure, when inner pressure is higher than a set pressure, the solenoid valve is opened by the control circuit of the solenoid valve and when exhausting, the cavity inner pressure is reduced. The novel ball milling device solves the problem that the inner pressure of the novel ball milling device is too high and materials are splashed, effectively prevents equipment damage, improves equipment safety, guarantees lithium iron phosphate blending accuracy, and improves lithium iron phosphate positive pole material product quality.

Description

technical field [0001] The invention relates to a production equipment of lithium iron phosphate, in particular to a ball milling equipment. Background technique [0002] Lithium iron phosphate (LiFePO 4 ) is mainly used for power batteries for electric vehicles. The crystal structure is olivine structure, which has the characteristics of high safety and long life. It is widely used in the field of power batteries such as electric vehicles and electric tools, and the field of energy storage equipment for wind power generation systems. At present, in the production process of lithium iron phosphate, the wet mixing method is the mainstream, so the ball mill is the mainstream equipment for production, as long as the function is to mix iron phosphate, lithium salt, carbon source and additives in the dispersant (purified water / ethanol) well mixed. [0003] In the prior art, the internal cavity of the ball mill is designed to be airtight, which is suitable for crushing and disp...

AI Technical Summary

Problems solved by technology

Iron phosphate, lithium salt, carbon source and additives are mixed in a dispersant (pure water / ethanol), and when heated or collided, they are easy to decompose and generate gas, and the pressure in the ball mill cavity will slowly increase until the material due to excessive internal pressure , splashed out from the gap of the gland, damaging the equipment and even injuring the workers. Due to the splashing of the material, the ingredients of lithium iron phosphate changed, which destroyed the product quality of lithium iron phosphate cathode material

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