- The Denza Z9GT can add 310 miles (500 km) of range in just five minutes.
- BMW execs claim that pursuing quick charging forces other compromises.
- The iX3 and i3 are BMW’s fast-charging EVs, supporting 400 kW speeds.
BYD sent a jolt through the EV space with its ultra-fast charging push, though not everyone is ready to buy in. The Chinese automaker unveiled a 1,500 kW flash-charging system in China, promising speeds that edge close to refueling a combustion car. Despite the extraordinary claims, BMW remains unconvinced.
According to BYD, the Denza Z9GT can add roughly 310 miles (500 km) of range in just five minutes, thanks to its 1,500 kW charging technology and the second-generation Blade Battery.
Read: BYD’s New EV Chargers Are So Fast They’re Arranged Like Gas Station Pumps
The system also relies on megawatt-level charging hardware and extremely high current delivery to reach those peak rates. It all sounds pretty incredible, but BMW battery production boss Markus Fallböhmer says pursuing charging speeds like this has compromises.
“You always have to be careful with those kinds of announcements,” he told Car Sales. “It is possible to optimize one single performance indicator, but you have to make compromises on other sides. We could also increase our charging speed, but then you have to reduce other important factors of a battery. It is a blanket – if you pull it at one side.”
BMW’s New EVs Are No Charging Slouches
The second-generation iX3 and the new i3 are the quickest-charging BMWs released to date, supporting peak 400 kW speeds. This is quick enough to top up the i3 with 400 km of range in just 10 minutes. BMW says it can guarantee “quality and safety” at these charging speeds, and appeared to question whether BYD can do the same.
BMW executives also indicated that pushing beyond these speeds would bring trade-offs in battery durability, range, and affordability, which they see as unnecessary for most real-world use.
“We look to decrease charging time more and more, but you have to look at range, durability, reliability,” the head of BMW’s Neue Klasse models, Mike Reichelt, added. “All of these facts, we guarantee. We look at the speed of the Chinese market… but on the other side, we guarantee quality and safety. That is a topic that we do not [negotiate] with anyone.”
The race to improve charging times in the EV world is much the same as we’ve seen among smartphone manufacturers looking to uprate charging speeds of their devices, with the Chinese often leading the charge. Boost charging speeds too much, and batteries can get hot, including the risk of thermal management issues, which is clearly something BMW would like to avoid.
