Samsung SDI presents at the 2021 InterBattery in South Korea its latest battery tech, including the new Gen.5 battery cells for electric vehicles.
One of the most interesting bits of news is that Samsung SDI''s executive vice president and head of research Chang Hyuk has confirmed that the company already produces cylindrical battery cells with NCA cathode (nickel, cobalt, aluminum oxide) that contains 91% nickel (previously at 88%). As far as we know, the 88% version first debuted in 2015 in cylindrical cells for power tools, before moving to EVs.
Those cells offer higher energy density (670 Wh/L) and reduce costs compared to higher-cobalt versions.
Moreover, the prismatic form factor of the NCA cells now is at 88% nickel (it usually is a step behind the cylindrical cells). Those new prismatic cells also entered production, with an energy density of 630 Wh/L and are expected to enable 620 km (385 miles) of range in a new SUV.
It might take up to a few years for the prismatic version to also switch to 91% nickel cathode compound.
As we can see, Samsung SDI approach is different from SK Innovation''s "Nickel 9" (NCM 9½½ we guess) and LG Chem''s LG Energy Solution NCMA, which both also achieve 90% or so nickel content in the cathode.
According to media reports, Samsung SDI is working also on two other technologies. The first is a new NMx (nickel, manganese oxide) cathode - possibly similar to the SVOLT Energy Technology''s cobalt-free NMx type.
The second thing is a dry electrode process, which simplifies the production so the manufacturing line and production time is significantly shortened. That would translate directly to lower costs. Tesla is working on something like that as well at its pilot 4680 plant in California.
Finally, in one of the videos from the event, we can take a look at Samsung SDI 2170 cylindrical battery cells for PHEVs and BEVs. The date of May 2019 suggests that those are the versions contracted for Rivian R1T/R1S vehicles.
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POSCO Future M CEO Kim Jun-hyung, fifth from left, and Samsung SDI Executive Vice President Kim Ik-hyeon, sixth from left, break ground during a ceremony for the POSCO Group affiliate''s NCA cathode materials plant in Gwangyang, South Jeolla Province, Thursday. Courtesy of POSCO Future M
Samsung SDI has increased the nickel content in the cathodes of its battery cells with NCA (nickel-cobalt-aluminium oxide) chemistry for electric cars. This should not only increase the energy density, but also reduce the costs compared to cells with a higher cobalt content.
As the battery manufacturer announced at the InterBattery trade fair in South Korea, cylindrical cells with a nickel content of 91 per cent (compared to 88 per cent previously) are already being produced. The information comes from Chang Hyuk, Executive Vice President and Head of Research at Samsung SDI. In the long term, the nickel content could rise to as much as 94 per cent, according to Chang.
As InsideEVs reports, the version with 88 per cent was used for the first time in cylindrical cells for power tools in 2015, before it was later also used in batteries for electric cars. According to the Korean portal The Elec, the 88 per cent cells are said to have been installed for the first time in 2018, which could refer to the premiere in electric cars.
In the prismatic cells with NCA cathode, the nickel content is now 88 per cent. Like the new round cells, they are already in production and are expected to have an energy density of 630 Wh/l. The report does not say which format the prismatic cells with NCA cathode will be built in. In a new, unspecified SUV model, this battery should enable a range of 620 kilometres.
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