New energy auto companies can't afford it?
Forward-looking technology, the development direction of electric vehicles, and the market prospects are considerable... Yes, these are the objective evaluations made by vehicle manufacturers on the hub motors, but at this stage no new energy auto companies have expressed interest in mass assembly.
"At present, we do not use the hub motor drive." Ren Yong, general manager of Changan New Energy Automobile Co., Ltd. said. Wang Hongjun, deputy chief engineer of BYD's electric vehicle research and development department, also told reporters: "In addition to the traditional motors, some of BYD's models use their own wheel motors."
On March 22nd, Shi Jian, general manager of Jiangsu Aoxin New Energy Automobile Co., Ltd. and director of the Yangtze River Delta New Energy Automobile Research Institute, told reporters that the cost of wheel hub motors is high and the changes are large. At present, new energy auto companies cannot afford them.
Shi Jian further explained: First, the wheel used in the two-wheel/four-wheel drive is definitely more expensive than a conventional motor, especially the current mold is not open; the second is that the hub motor and the reducer are not mature; the third is the hub motor There are too many controllers. At present, the industry is trying to achieve four controllers for one controller, but it has not yet reached the level of application. Fourth, the entire chassis structure will change greatly, such as suspension system, braking system, motor control. And so on, even the undercarriage system has to redesign the module.
In this regard, a technical expert in the industry said that the market is the driving force, provided that technical obstacles can be overcome, otherwise it cannot become productivity. He believes that the hub motor can only be tested in a very limited special environment. Its application in the car is not only the hub motor itself, but also the possibility of industrial application of the hub motor from the perspective of the whole vehicle.