Currently in the car driving on the road, the driving force mainly comes from the power device, transmission and braking device. A very crazy idea that was back more than 100 years ago is gradually becoming a reality - in pure electric or hybrid cars, the motor is arranged in the hub and the hub motor is used as the main driving force. With the development of new energy vehicles, will the wheel hub motor technology become the future driving force for new energy vehicles?
Two domestic auto parts companies have joined Protean
The traditional drive system separates the power, transmission and braking, while the hub motor technology integrates the power device, transmission and brake device into the hub, omitting the clutch, transmission, transmission shaft, differential, and transfer. Components and other components, new energy vehicles can use the hub motor as the main driving force. In recent years, wheel hub motors have gradually entered the domestic view with the development of new energy vehicles.
At the 2018 China Electric Vehicle Centenary Forum, He Junzheng, president of Hubei Taite Electromechanical Co., Ltd., remarked that “wheel hub technology can provide 15% increase in driving range for electric vehicles compared to the central motor.†Inducing domestic industry to wheel hub motors Technical attention.
On March 27, Weifu Hi-Tech purchased Protean's Series E preferred stock for US$30 million. After the completion of the investment, Weifu Hi-Tech will hold 12.77 million E-round preferred stocks and will hold 12.34% of Protean shares. In addition, it is worth mentioning that Weifu Hi-Tech and PEL jointly invested 20 million US dollars in the ratio of 80:20, and established a Sino-foreign joint venture company Protean Electric Ltd in Wuxi.
As early as June 2016, when Protean issued D round of financing, Wanan Technology purchased 99.5002 million shares of preferred stock for US$20 million. After the transaction was completed, Wanan Technology holds a 10.36% stake in Protean. At the 13th Shanghai International Automotive Parts, Maintenance Testing and Diagnostic Equipment and Service Products Exhibition held in December 2017, Wanan Technology demonstrated Protean's hub motor.
According to Protean, wheel hub motors are a forward-looking technology that has not yet entered volume production. According to the development of new energy vehicles, mass production is expected to begin in 2019. According to reports, in 2018, the two sides will produce the latest accessories for a new energy vehicle.
The layout of the wheel hub motor system, Weifu Gaoke entered the new energy passenger car and light truck core components, reducing the market for Weifu Gaoke growth space concerns. In addition, Weifu Hi-Tech Co., Ltd., at the same time, has established an 80:20 joint venture company with Protean and is committed to the R&D of 18-inch wheel and hub motor systems, mainly B-class vehicles and light trucks. It is expected that the product will be tested in the 19 years and Weifu Hi-Tech will follow-up on the progress of the project.
At present internationally, in addition to Protean, the famous wheel motor manufacturers include Canada's TM4 company, the well-known tire manufacturer Michelin and Japan's Bridgestone. This can not help but wonder why domestic auto parts manufacturers love this company.
Wheel motor will subvert the traditional drive?
According to statistics, Protean's ProteanDRIVE drive system provides efficient fuel economy, powerful torque, powerful power performance and a flexible driving experience for newly-developed vehicles and models already on the market. Protean's system can effectively provide more than 30% fuel economy based on battery capacity and driving environment.
In addition, Protean also develops the world's leading hybrid, plug-in hybrid, pure electric vehicle hub motor system, with the strongest and most comprehensive in-wheel motor technology, testing and application experience. It is China's Class B mid-size vehicle and SUV. , MPVs and even light commercial vehicle type hybrid electric vehicles and pure electric vehicles provide the power and torque required for driving.
In-wheel motor, with its mature technology and mass production, will have a disruptive impact on components such as clutches, transmissions, transmission shafts, differentials, and transfer units of conventional automobiles. In addition, similar to the difference between electronic watches and mechanical watches, motor-driven wheels have great advantages in terms of response sensitivity, control accuracy, and the like compared to conventional wheels.
Then the problem has arisen. With such treacherous hub motors, the above two companies have also stated that the wheel hub motor drive technology has great development prospects in the future. Why hasn't rolled out yet?
The main reasons are as follows:
1. The operation of Protean has not improved. According to the 2016 annual report of WanAn Technology, Protean's annual revenue for 2015 was 4,229,400 yuan and its net profit was 92,616,400 yuan. In 2016, Protean's revenue was 342,700 yuan and net profit was 140 million yuan. In the first half of 2017, Protean’s revenue was 2,503,300,000 yuan and net profit was 52.145 million yuan.
2. The advantages are obvious, but technical problems still exist. At present, the industry generally believes that the hub motor is mainly faced with three major problems: the motor overheating will lead to demagnetization resulting in motor failure, increased unsprung mass and the hub motor can effectively integrate with the vehicle. Because the wheels often need to be under heavy load and low-speed climbing slopes, the motors are placed in narrow wheels, and it is easy for the motor to overheat due to insufficient cooling. In addition, braking may also cause the motor to overheat. Song Jian, Dean of the Institute of Automotive Technology at Tsinghua University, said that overheating will lead to demagnetization of the motor material, which will directly affect the performance of the vehicle. Therefore, some people in the industry think that the bottleneck of wheel hub motor technology is difficult to break through and it is not suitable for large-scale promotion in the short term.
3. At present, 90% of domestic electric vehicle companies are taking the route driven by the central motor. This technology is actually a transformation from traditional cars. The chassis of most cars is still the chassis of traditional cars, not according to the characteristics of pure electric vehicles. To develop.
4, in addition to technical issues, for the traditional car companies, has always been driven by the drive, drive driven, the chassis back to the chassis, clearly divided. Once the hub motor is popularized, the transmission system will be eliminated and the drive and chassis will be deeply integrated. This poses a very big challenge to the organizational structure of traditional car companies. Traditional car companies want to promote this change, its determination is no less than a broken wrist.
to sum up
Technically, the phenomenon of thermal demagnetization of the hub motor does exist, but in the future, a good cooling system has been developed that allows the heat to be dissipated in a timely manner and to prevent demagnetization of the motor material. In industry, when a new technology or new product of a disruptive industry emerges, it will have a substitute effect on traditional products, but it may take longer. However, it is undeniable that the wheel hub motor system will be one of the development directions of future new energy vehicle driving force.
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