Press roll for pressing secondary battery electrode and producing process thereof

A secondary battery, pressing roller technology, applied in the direction of electrode manufacturing, process efficiency improvement, energy efficiency improvement, etc., can solve the problems affecting the internal quality of the battery, the non-uniformity of the pole piece pressing, increasing the use cost, etc., to reduce the roller Consumption and use costs, increased hardness, and the effect of prolonging service life

Inactive Publication Date: 2011-09-14
珠海市光环自动化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Press roll for pressing secondary battery electrode and producing process thereof
  • Press roll for pressing secondary battery electrode and producing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Molding: select electroslag remelted steel ingots containing 0.97% molybdenum, 1.63% chromium, 2.15% nickel, 1.05% silicon, 1.50% manganese, 2.20% tungsten and 0.30% lanthanide rare earth alloy, and the rest is iron. Base material, the unit is percentage by weight, the same below; when the base material is heated to 1000~1050°C, it is forged with a 400T hydraulic press and finally forged into a roller blank with a diameter of 300mm; put the roller blank into the well Carry out spheroidization heat treatment in a type furnace, and fill with protective gas propane when the temperature rises to 580 °C. When the furnace temperature reaches 730°C, keep it warm for 4 hours, and then cool down with the furnace. After reaching room temperature, carry out rough turning machining, leaving a finishing allowance of 0.5mm. Then carry out preheating treatment in the pit furnace, heat it up to 950°C for 5 minutes and carry out oil cooling, take out the roller blank for air coolin...

Embodiment 2

[0023] (1) Molding: choose carbon 0.75%, molybdenum 0.60%, chromium 0.80%, nickel 0.85%, silicon 0.70%,

[0024] 0.95% manganese, 3.5% tungsten, 0.20% lanthanide rare earth alloy, and electroslag remelted steel ingots with the rest being iron as raw materials. Heat the above-mentioned electroslag remelting steel ingot, when heated to 1100~1220°C, press the hydraulic press to form a roller billet, the diameter of the roller billet is 800mm; put the roller billet into the pit furnace for spheroidization heat treatment, heat up When it reaches 580°C, fill it with protective gas methanol; continue heating to 700°C, stop heating, keep it warm for 5 hours, and then cool down with the furnace; after reaching normal temperature, it will be cut and roughed, leaving a finishing allowance of 0.3mm; After the temperature in the pit furnace is raised to 650°C, heat it for 15 minutes and then carry out oil cooling. After the oil is cooled to 600°C, take out the roller blank for air-cooling ...

Embodiment 3

[0028] (1) Molding: choose carbon 1.65%, molybdenum 1.60%, chromium 2.10%, nickel 3.20%, silicon 1.20%,

[0029] Manganese 1.60%, tungsten 5.05%, lanthanide rare earth alloy 0.55%, and electroslag remelted steel ingots with the rest of iron as raw materials. Heat the above-mentioned electroslag remelting steel ingot, when heated to 1000~1220°C, forge and press into a roller billet with a hydraulic press, the diameter of the roller billet is 1000mm; put the roller billet into the pit furnace for spheroidization heat treatment, heat up When it reaches 580°C, fill it with protective gas methanol; continue heating to 800°C, stop heating, keep it warm for 2 hours, and then cool down with the furnace; after reaching normal temperature, it will be cut and roughed, leaving a finishing allowance of 0.3mm; After the temperature in the well-type furnace is raised to 950°C, heat it for 5 minutes and then carry out oil cooling. After the oil is cooled to 700°C, take out the roller blank fo...

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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...

Claims

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Application Information

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IPC IPC(8): C22C38/58C22C38/44H01M4/04
CPCY02E60/12Y02E60/10Y02P10/25
Inventor 罗开亮吴升振
Owner 珠海市光环自动化科技有限公司
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