Battery packs
The Nio ET7 is sold with two purchasable battery options, a standard range pack and long range pack. Initially, the standard range pack was to be a 70kWh NMC battery produced by CATL, with 500. km of CLTC range. Later, it was replaced by a new 75kWh LFP-NMC dual chemistry battery with peak range of 550. km revealed before ET7 production began. It consists of an undisclosed ratio of serially connected LFP and NMC battery cells assembled in a cell-to-pack format and a special pack management system, and it allows for a blend of each chemistries advantages: the higher energy density, better cold weather charging, and accurate state-of-charge readings from NMC cells, and the lower costs, lower wear, and improved safety from LFP cells.
For the 2024 facelift, the standard range battery was once again changed, this time to a fully LFP cell-to-pack battery, which also features an increased peak DC fast charging rate of 170kW compared to the previous pack's 140kW rate.[15][16]
The long range battery is a 100kWh NMC pack sourced from either CATL or CALB with a cell-to-pack design, allowing for up to 705 km of range.
In mid-2024, a 150kWh semi-solid state NMC battery was introduced, allowing for an NEDC range of 1050. km. It is the first ever mass produced automotive traction battery to use semi-solid state electrolyte technology, and is supplied by WeLion.[17] The semi-solid state technology allows it to have a 50% higher capacity with only a 20 kg weight increase over the 555 kg 100kWh pack, while maintaining the same size. It is initially available only as a short-term rental from a battery swap station, but it is planned to be available for purchase later. At its reveal in February 2024, Nio said that each pack costs the company as much as an entire ET5 at launch, which has a starting price of CN¥328000, or CN¥258000 (approximately US$48000, or US$38000) with a battery subscription.[18][19][20]
