NIO plans to deliver 150kwh solid-state batteries in the fourth quarter

IT House reported on July 21 that Weilai officially said today that it plans to deliver a 150kwh solid-state battery in the fourth quarter of 2022, using solid-state electrolyte, silicon-carbon composite negative electrode material, and ultra-high nickel positive electrode material. 360Wh/kg.

According to reports, NIO’s new ES8 can reach 850km, ES6 can reach 900km, and ET7’s NEDC battery life can exceed 1,000km. Users can enjoy the battery through a flexible battery upgrade plan.

On the “NIO Day” on January 9 last year, in addition to the launch of the first sedan ET7 and the NAD system for autonomous driving, NIO also released the first 150kWh solid-state battery. This battery is not only the highest-capacity on-board power battery released by a car company so far, but also the first solid-state battery mounted on a mass-produced car.

According to the introduction, NIO’s 150kwh battery uses ultra-high nickel positive electrode + pre-lithiated silicon carbon negative electrode + solid electrolyte (solid + liquid) + separator, which is a transitional technology from liquid to solid state battery.

Li Bin, the founder of Weilai, emphasized that this battery still has a liquid (electrolyte), and the mass production of all-solid-state batteries is still a long way off, because the current market demand for solid-state batteries is very low. The industry expects that the mass production of real all-solid-state batteries will still take 5-10 years.

However, he also revealed that the solid-state battery small test has reached the technical requirements. It is reported that the battery uses three new processes.

The innovation of “in-situ solidified solid-liquid electrolyte” lies in the in-situ polymerization coating technology, which improves the interface contact between the positive and negative electrodes. achieve an increase in energy density.

The “inorganic pre-lithiated silicon carbon negative electrode” is a negative electrode that uses a silicon-carbon mixed material and uses pre-lithiation technology to solve its shortcomings such as large volume expansion rate, insufficient cycle life, and low first charge efficiency during the charging and discharging process.

The “nano-scale coated ultra-high nickel cathode” process uses nano-scale coating technology to improve the interface between the cathode material and the solid-liquid electrolyte, so that the energy of the ultra-nickel cathode material cathode can be greatly improved.