Preparation method of asymmetric rare earth capacitor battery

Abstract

The invention relates to a preparation method of an asymmetric rare earth capacitor battery, and belongs to the field of water power battery. The method comprises the steps that: positive electrode and negative electrode battery slurries and a capacitor slurry are prepared; the positive electrode slurry is coated on foamed nickel, such that a positive electrode is prepared; bake-drying, rolling, powder removing, welding, and longitudinal and transverse cutting are carried out, such that a positive electrode sheet is prepared; the positive electrode sheet is packaged by using a separation film bag; the negative electrode slurry is coated on foamed nickel, and the materials are bake-dried; the capacitor slurry is coated on the material, and secondary bake-drying, rolling, powder removing, welding, and longitudinal and transverse cutting are carried out, such that a negative electrode sheet is prepared; the positive and negative electrode sheets are stacked, such that a battery core is prepared; the battery core is placed in a housing, and welding, top cover sealing, and liquid injection are carried out; and series connection formation is carried out, such that the battery is prepared. According to the invention, laminated coating is adopted in preparing the negative electrode sheet, such that the capacitor material is completely effectively combined with the battery material, and the integration of the positive and negative electrode sheets and the conductive lugs is realized. The battery has the advantages of high safety, environment friendliness, and low cost. The battery has both the energy density advantage of a nickel-metal hydride battery and the power density advantage of an asymmetric supercapacitor, such that operation conditions for electric vehicle and the like can be achieved.

Description

technical field [0001] The invention relates to a preparation method of an asymmetric rare earth capacitor battery, and belongs to the technical field of water system power batteries. Background technique [0002] Since the beginning of the 21st century, the call for energy conservation and emission reduction has become increasingly high. The stable growth of the world economy and the sustainable development of human society also urgently require the development of new energy sources and improved energy utilization methods. Due to the advantages of reasonable energy density and appropriate power density, wide operating temperature range, and long cycle life, capacitor batteries have broad application prospects in portable appliances, electric vehicles, hybrid electric vehicles, and DC power supplies. Therefore, research on capacitor batteries has become a major focus of countries developing energy-saving and new energy industries. [0003] Supercapacitors have become a new ...

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Problems solved by technology

[0009] In the prior art, after the pole piece comes out, the pole piece needs to be welded separately. After the baseband is drawn, it is rolled and cut into pole pieces of the corresponding size according to the proportion, and then manual turnover is entered into the next process for manual or machine operation. , Weld the pole piece with the tab. This method is very suitable for the pole piece used in small batteries; if the area of ​​the pole piece increases, the loss rate of the pole piece during the turnover process will double, and the place where the pole piece is to be welded is prone to damage. Secondary pollution affects the welding quality; the pole pieces are cut separately and then welded separately, and a turnover process is added in the middle, which inevitably leads to backlogs, uncoordinated production, and difficulty in improving production efficiency

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