Once they achieve scale it will render current EVs obsolete...
QuantumScape, a solid-state battery startup, announced earlier this month that the final goal of 2021 was achieved ahead of schedule.
The goal was related to the longevity of the cell, which should withstand 800 charging cycles, estimated as an equivalent to 240,000 miles (386,000 km) of driving (assuming 300 miles/483 km per charge).
The 10-layer battery cell prototype retained more than 80% of its initial capacity after 800 cycles (100% depth-of-discharge), at 1C-1C current (1 hour charging/1 hour discharging), at a temperature of 25°C, and at 3.4 atmospheres of pressure.
The numbers appear to be good enough for electric cars, as there are not that many cars that will even reach such mileage over their lifetime.
It's great to see that 800 cycles were achieved also in a 10-layer prototype and hopefully it will be at least maintained in bigger and more complex versions of the cell. We estimate that the 10-layer cell has some 2 Ah, which is not yet big enough (for reference, pouch cells are often 20 Ah).
An important thing about solid-state battery is fast charging capability. QuantumScape promises 10-80% in 12 minutes.
QuantumScape, a solid-state battery startup, announced earlier this month that the final goal of 2021 was achieved ahead of schedule.
The goal was related to the longevity of the cell, which should withstand 800 charging cycles, estimated as an equivalent to 240,000 miles (386,000 km) of driving (assuming 300 miles/483 km per charge).
The 10-layer battery cell prototype retained more than 80% of its initial capacity after 800 cycles (100% depth-of-discharge), at 1C-1C current (1 hour charging/1 hour discharging), at a temperature of 25°C, and at 3.4 atmospheres of pressure.
The numbers appear to be good enough for electric cars, as there are not that many cars that will even reach such mileage over their lifetime.
It's great to see that 800 cycles were achieved also in a 10-layer prototype and hopefully it will be at least maintained in bigger and more complex versions of the cell. We estimate that the 10-layer cell has some 2 Ah, which is not yet big enough (for reference, pouch cells are often 20 Ah).
An important thing about solid-state battery is fast charging capability. QuantumScape promises 10-80% in 12 minutes.
