It is reported that under the support of the "12th Five-Year Plan" National 863 Program, the "high-energy lithium-ion battery system and battery pack technology development" project has made significant progress. The project aims to develop high-energy lithium-ion batteries for lithium iron phosphate cathode materials, and carried out studies on lithium-ion battery raw materials and battery cell design technologies, including domestic testing of lithium iron phosphate cathode materials, aluminum foil coating technologies, and diaphragm coating. Layer technology research. The research and development product has a single cell battery energy density of 138.6 watt-hours/kg, a power density of 915.6 watts/kg, and a capacity retention rate of 94.1% after 1200 cycles. The results have been applied to mass production of 50 ampere-hour energy-type power batteries. on.
Among them, the 38.4 volt/50 ampere-hour battery module for electric vehicles has an energy density of 121 watt-hours/kilogram and a power density of 800 watts/kilogram; the 345.6 volts/50 ampere-hour battery system has been applied to Chery's small pure electric cars and Austrian New pure electric sanitation vehicle.
The project has also made important progress in domestic production and manufacturing equipment. It has developed a fully automatic closed automatic feeding system, a battery plate automatic lamination machine, a large-capacity battery automatic injection machine, and a battery that can automatically hold the battery. Forming fixtures, and established automated lithium ion battery detection and matching production line, greatly improving the consistency of the battery, the battery core matching rate is greater than 95%, to take an important step in meeting the high requirements of automotive applications.
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