High-precision and stable discharging device in lithium battery industry and control method thereof

Abstract

The invention discloses a high-precision and stable discharging device in the lithium battery industry and a control method thereof. The high-precision and stable discharging device in the lithium battery industry comprises at least two temporary storage bins, a discharging opening of each temporary storage bin is connected with a feeding bin through a material conveying pipeline, a feeding valve is mounted on each material conveying pipeline, a weightlessness scale is mounted in the bottom of each feeding bin, a weightlessness scale sensor is arranged in the weightlessness scale, a speed-adjustable discharging mechanism is arranged below a discharging port of the feeding bin, the speed of the speed-adjustable discharging mechanism is adjusted through a controller, and the controller is connected with the feeding valve and the weightlessness scale sensor at the same time. According to the control method, closed-loop control is achieved through a control program, so that continuous, stable and uninterrupted discharging of the discharging device is achieved, and meanwhile, the batch feeding metering precision is improved, and interference of external factors is avoided. The high-precision and stable discharging device in the lithium battery industry and the control method thereof are suitable for online simultaneous stable discharging of two or more than two ultra-high molecular weight polyethylene, and guarantee can be provided for preparation of high-stability and high-consistency diaphragm products.

Description

technical field [0001] The invention relates to a high-precision and stable feeding device and a control method thereof in the lithium battery industry, belonging to the field of lithium battery diaphragm production. Background technique [0002] The raw material used in the wet lithium battery separator industry is ultra-high molecular weight polyethylene. During the use of ultra-high molecular weight polyethylene, two or more different ultra-high molecular weight (≥400,000) polyethylenes are usually used at the same time, and enter the extruder through the metering system. , and in the process of simultaneous use, the requirements for the uniformity of mixing and the stability of blanking are very high. [0003] There are currently two known mixing schemes for the blanking system, one is to use a high-mixer for premixing, and then put it into the blanking system after mixing. The other is online mixing. The two silos share a loss-in-weight scale for feeding, and then ente...

AI Technical Summary

Problems solved by technology

Among the above two schemes, the first mixing scheme takes up a lot of space, is costly, and is complicated to switch between different formulas, making it difficult to meet production requirements.

The second option, although it can continuously mix and discharge materials online, has poor stability and large fluctuations, which has a greater impact on product quality.

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