New energy automobile double-motor drive axle

Abstract

The invention discloses a new energy automobile double-motor drive axle. The new energy automobile double-motor drive axle drive a left wheel and a right wheel on the same axle by two motors through two gear sets respectively. The double-motor drive axle is provided with two motor systems, and the motors of different powers and rotating speeds can be selected. According to the driving cycles, a vehicle control unit and a motor controller are used for controlling the rotating speeds of the motors, the working efficiency of the motors are brought into full play, and meanwhile the electronic stable control (ESC) function can be achieved. Due to drive of the two motors, the driving force of the single axle can be increased; due to the structure, no differential mechanism is needed, the structure can be simplified due to left and right independent drives, and the dead weight and cost of the traditional drive axle are lowered. Power is provided by two battery packs to the two motors, the service life of batteries is prolonged, and the using safety of the batteries is improved. The double-motor drive axle is of double-wishbone-type and MacPhersan-type suspension two structures.

Description

technical field [0001] The invention relates to the technical field of multi-motor drive and speed change, in particular to a dual-motor drive axle of a new energy vehicle. Background technique [0002] With the development of new energy vehicles, the social demand for new pure electric vehicles such as pure electric buses, pure electric trucks and pure electric logistics vehicles is increasing. [0003] At present, the pure electric vehicles produced by most electric vehicle manufacturers, some use electric motors instead of engines to provide power, and the chassis is refitted from traditional second-class chassis, and some use a low-speed single-motor drive axle to drive two rear wheels. Affected by the addition of drive motors, power batteries and other assemblies, the curb weight of the chassis is larger and the load weight becomes smaller, especially the unsprung mass increases, which makes the ride comfort and handling stability worse. Moreover, due to the high-speed...

AI Technical Summary

Problems solved by technology

Affected by the addition of drive motors, power batteries and other assemblies, the curb weight of the chassis is larger and the load weight becomes smaller, especially the unsprung mass increases, which makes the ride comfort and handling stability worse

Moreover, due to the high-speed and low-torque characteristics of the electric motor itself, it also restricts the climbing performance when driving at high speed.

The chassis structure of the current pure electric vehicle restricts the load capacity and power of the vehicle, which greatly limits its use

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