Gotion High-Tech to build fast-charging 5C battery in series production
According to the company’s announcement, this G-Current battery can be charged to 80 per cent in 9.8 minutes and it should take 15 minutes to reach 90 per cent, according to Gotion. The new battery type should be able to be used “for the entire range of battery applications”. On the vehicle side, this means both battery-electric cars and hybrid vehicles, but also different cell chemistries. Gotion mentions “LFP, LMFP, and NCM chemistry systems” here. 5C means that the battery can be charged with five times its energy content – for a 50 kWh battery, this would correspond to a maximum charging capacity of 250 kW.
Cao Yong, Vice President of the Engineering R&D Institute of Gotion High-Tech, stated at the conference that the release of G-Current batteries signifies mass production. However, details of production and potential customers for the new G-Current battery are not known.
In addition to the 5C battery, Gotion also presented the cylindrical NCM Stellary battery with a high nickel content at the conference. A high nickel content generally ensures a high energy density and therefore a long range. However, a high charging capacity should also be possible: Gotion promises a duration of nine minutes for charging from ten to 70 per cent. “Battery Packs equipped with this cell can complete 350km range charging in 5 minutes and 600km range charging in 10 minutes,” the company wrote. Another special feature: thanks to the structural design of the battery pack, 70 per cent of the heat can be dissipated from the pack in just three seconds, “ensuring cooling at maximum speed under extreme conditions and ensuring that the pack does not transfer heat”.
However, the high nickel content also drives up costs in view of raw material prices. Gotion states here that the Stellary battery pack uses a “second-generation silicon-carbon material” developed in-house. The materials used and the high-precision production in Gotion’s ‘Gen7 factory’ are intended to reduce manufacturing costs by 50 per cent.
Although the third innovation is not yet ready for production, it has nevertheless been announced: an all-solid-state battery technology called Gemstone. The Gemstone battery is said to achieve an energy density of 350 Wh/kg, 40 per cent higher than conventional NMC batteries according to Gotion. However, such comparisons should be treated with caution.
The exact stage of development is also left open. Gotion merely mentions that the Gemstone battery “successfully passed a 200-degree hot box test at the first attempt”. The 200 degrees is higher than the 130 degrees specified in the Chinese standards. Gotion sees this as “a significant advance in battery technology in terms of safety”.
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