Great Wall Motors' Electric Drive Axle for Commercial Vehicles Mass-Produced

TapTechNews July 4th news, Great Wall Motors announced yesterday that the Great Wall Smart Card electric drive axle independently developed by Great Wall Commercial Vehicles was mass-produced and off the production line on June 28th.

According to the introduction, the electric drive axle of this mass-production offline adopts a self-developed double oil-cooled flat wire motor, and the motor efficiency reaches 97%, with the characteristics of no interruption in climbing and shifting, and no power failure. Through the intelligent algorithm of the multi-in-one power domain controller, the power of the dual motors can be allocated according to the transportation scene to optimize the shift strategy and then reduce the power consumption.

The overall axle realizes the lightweight of the axle through the integrated design of the drive motor and the 4-speed AMT transmission. On this basis, it has the advantages of strong resistance to oscillation and impact, small system energy loss, and high transmission efficiency. Currently, this axle has completed a bench test of 1.8 million miles (about 2.9 million kilometers), supporting a maximum vehicle speed of 120 kilometers per hour (about 75 miles per hour) and a maximum vehicle climbing gradient of >30%.

It is worth mentioning that the ultra-fast charging underfloor battery technology solution jointly developed by Great Wall Commercial Vehicles and ecological partner Honeycomb Energy, when coordinated with the Great Wall Smart Card electric drive axle, can reduce the center of gravity of the vehicle chassis.

TapTechNews note: The electric drive axle belongs to a kind of drive axle. New energy commercial vehicles are generally integral electric drive axles. According to the introduction in the book Automobile Design by the Mechanical Industry Press, the drive axle is at the end of the power transmission system, and its basic functions are:

1. Transmit the engine torque transmitted from the universal transmission device to the driving wheels through the main reducer, differential, half shaft, etc., to achieve the effect of reducing speed and increasing torque;

2. Change the direction of torque transmission through the bevel gear pair of the main reducer;

3. Realize the differential effect of the two wheels through the differential to ensure that the inner and outer wheels turn at different speeds;

4. Realize the load-bearing and torque transmission functions through the axle housing and wheels.