Denza is a equally owned joint venture between Daimler AG and BYD Auto. The joint venture has been producing the DENZA EV since late 2014 without much success.
The original DENZA EV had a 47,5 kWh battery that weighed 550 kg, it was advertised with a 300 km range. Now the battery was upgraded to 62 kWh while maintaining the same size, the weight is still unknown. With the battery upgrade came a new designation, DENZA 400 EV, that indicates the new advertised 400 km range.
The first DENZA EV weighed 2.090 kg, this explains the low efficiency. The DENZA 400 EV is probably even heavier. Not as bad as the 2.420 kg of the BYD e6 with its 82 kWh battery that weighs 700 kg.
With most of the electricity in China being produced from coal, these heavy and inefficient cars are far from solving pollution problems. It really annoys me that most of Chinese electric cars are so inefficient.
Yet the volumetric energy density increase of the battery is good news.
Daimler seems very proud of this improvement:
“The DENZA 400 features improved battery density achieved through an upgraded production process that increases the battery’s capacity from 47.5 kWh to 62 kWh while maintaining the original size. With an upgraded range of up to 400 km, most Chinese consumers, who generally drive 50 to 80 km per day, will only need to recharge their DENZA 400 once per week.
The first generation of DENZA was launched in 2014 as the premiere offering from the first Sino-German joint venture dedicated to electric vehicles in China. With nearly 3,000 units sold in its first year in 2015, DENZA quickly became the choice for those seeking convenient and reliable emission-free mobility.”
We’ve reached a point where the 60 kWh batteries seem to be the goal for most electric cars, excluding Tesla Motors.
Now can we all stop obsessing only in battery capacity increase and start working in efficiency?
For the North American and European markets, we’ll have to wait for the Paris Motor Show. We might get to see what the new SK Innovation cells can do to improve the range of the Mercedes-Benz B250e.