Manufacturing method of polymer lithium-ion power battery

Abstract

The invention discloses a manufacturing method of a polymer lithium-ion power battery. In the battery, an aluminum corrosion foil serves as a positive current collector; a copper foil serves as a negative current collector; a layer of positive conductive carbon slurry and a layer of negative conductive carbon slurry are pre-coated on two surfaces of the positive and negative current collectors respectively; positive and negative active slurries are coated on the positive and negative current collectors respectively; and after an electrolyte is poured into the battery, in-situ polymerization is initiated through electromagnetic induction heating. The manufacturing method is used for manufacturing the polymer lithium-ion power battery serving as a power battery of an electric vehicle, can increase the utilization rate of raw materials, reduce the cost of the battery, reduce the internal resistance between active substances and the current collectors, reduce the temperature rise of the battery, prolong the service life of the battery and improve the safety of the battery. Furthermore, the way of electromagnetic induction polymerization uniformly heats at a high speed, so that the performances and consistency of the battery are greatly improved.

Description

technical field [0001] The invention relates to a high-power power battery applied to an electric vehicle, in particular to a manufacturing method of a high-power polymer lithium-ion power battery. Background technique [0002] At present, the total amount of global greenhouse gas emissions continues to rise, and 25% of carbon dioxide emissions come from automobiles. The pollution emitted by automobiles has become an important factor of air pollution, and the pressure to reduce carbon dioxide emissions will become greater and greater. Vigorously developing electric vehicles and using electricity instead of oil is a strategic measure to ensure my country's energy security. Lithium-ion power batteries are the core components of electric vehicles. In recent years, with the improvement of people's awareness of environmental protection and the support of various national preferential policies, lithium-ion power batteries have developed rapidly. According to the different electr...

AI Technical Summary

Problems solved by technology

After discharge, the surface temperature of the battery is about 60-70°C, and the life and safety of the battery working at this temperature will be reduced to a certain extent

[0004] 2. The utilization rate of raw materials in the production process of the battery is not high, and the yield rate is low, resulting in high additional cost of the battery

[0005] 3. The on-site polymerization method has low cost and is easy to produce on a large scale. However, the current heating method during polymerization is to use a resistance oven to heat, and the temperature distribution in the oven is uneven, which greatly destroys the uniformity of the gel electrolyte and the gel electrolyte and electrode. Interfacial stability of sheets, separators, etc.