Press roll for pressing secondary battery electrode and producing process thereof

Abstract

The invention relates to a press roll for pressing a secondary battery electrode and a producing process thereof, belonging to the technical field of mechanical manufacture and electrochemical power sources. The producing process of the press roll used for pressing the secondary battery electrode comprises the following steps of: performing a molding process on raw materials, namely rare earth alloy containing carbon, molybdenum, chromium, nickel, tungsten, silicon, manganese and lanthanum series and ferrous electroslag remelting steel ingots; heating and then forging and pressing to form a press roll blank by using a hydraulic press; performing balling heat treatment, performing furnace cooling, then raising the temperature, performing homeothermy to constant temperature; and finally performing postprocessing. In the invention, an ultradeep quenching treatment method is adopted, the treatment depth ranges from 10mm to 15mm below the surface of the press roll, thereby the hardness of the press roll is increased, the strength is improved, and high-precision electrode pressing is ensured; and the press roll produced by using the method has the advantages of high hardness, high strength and good wear resistance, can be widely applied to various precision presses, saves use cost, improves product quality and increases production efficiency.

Description

technical field [0001] A pressing roller for pressing secondary battery electrodes and a production process thereof, in particular to a precision pressing roller for pressing secondary battery electrodes with high hardness, high strength and good wear resistance, belonging to the technical fields of mechanical manufacturing and chemical power sources. Background technique [0002] In the production of secondary batteries such as nickel-metal hydride and lithium-ion, the positive and negative electrodes of the battery need to be rolled after slurry coating to increase the filling density of the electrodes and make their surfaces more uniform. Therefore, pressing is a very critical link, and the pressure roller is an important part of the rolling mill. It is necessary to ensure that the pole piece is pressed to the designed density and thickness, and the deformation of the pole piece is minimal, and the pressure roller is wear-resistant, has high strength and hardness, and the...

AI Technical Summary

Problems solved by technology

The pressure rollers of most of the presses currently used are generally made of carbon steel forgings, and then undergo a heat treatment and then nickel-plated on the surface. After long-term rolling, the coating will gradually fall off and the surface is easily worn. It causes the unevenness of the pole piece pressing, which directly affects the internal quality of the battery

At the same time, the pressure roller is also very easy to wear and tear. It needs to be disassembled frequently for grinding and plating. After several times of grinding, the pressure roller will be scrapped, which not only increases the cost of use, but also affects the production efficiency.

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