Chinese battery cell manufacturer, Gotion High-Tech, has presented a lithium manganese iron phosphate (LMFP) cell that it claims has a gravimetric energy density of 240Wh/Kg and volumetric energy density of 525Wh/L.
At its Science and Technology conference in Hefei, Anhui Province, Gotion revealed its Astroinno L600 battery pack which they claim has a service life of more than 4,000 cycles at room temperature and 1,800 cycles at high temperature. The pack with these cells has an energy density of 190Wh/Kg.
The company state that the difficulties of Mn leaching at high temperatures, low electrical conductivity and low density in LMFPs have been solved. Its take uses a co-precipitation, doping encapsulation technology, new granulation technology and new electrolyte additives. The Cleveland Institute in Ohio, US, has developed a new electrolyte for LMFP that significantly improves the high-temperature cycling and storage performance.
Gotion claim that the cell’s cathode – now LMFP instead of LFP – will significantly increase energy density and fast charging capability (18 minutes), though the state of charge range or actual charging power is unclear. The company states a double-sided liquid cooling sandwich construction and minimalist design concept, “Reduces the number of structural parts the battery pack by 45% and lowers the weight of the structural parts by 32%”.
Mass production of the new cell is expected to start in 2024. Gotion claim its Astroinno battery pack will enable EVs to achieve a range of 1,000km without using NCM materials.
Volkswagen have been the largest shareholder of Gotion since the end of 2021. Gotion are supplying VW with LFP batteries both inside China and globally but so far have not indicated whether the new LMFPs will also be supplied.
