800 volt battery achitectures have both upsided and downsides. The "more is better" vibe leads too many people to assume 800V is inherently superior. It is not.
The single biggest advantage is that for a given charging power, the amperage in the charging cable is half as much.
The single biggest advantage is that for a given charging power, the amperage in the charging cable is half as much.
Comments
Each cell is ~4 volts. A 400 volt pack would have 100 instances of 2 parallel cells, put in serie to make 400 volts.
During charging, all the current in the 800V arrangement would go through every cell. In the 400 volt arrangement half the current goes through each cell. The 800V pack only needs half the current for a given power, but the although the
BTW, the number of cells may be much greater than 200, but the same logic applies.