A range extender device for an electric vehicle

Abstract

The invention provides a range extender device for an electric vehicle, which belongs to the technical field of dynamic drive. The range extender device comprises an engine, a twisting vibration damper and a generator, wherein a flywheel of the engine is mechanically connected with a driven piece of the twisting vibration damper; and a clutch plate hub of the twisting vibration damper is mechanically connected with an input shaft of the generator. The twisting vibration damper is obtained through modification on the basis of a clutch disc assembly of a dry clutch, and a wavy spring and a friction plate in the clutch disc assembly of the dry clutch is removed. The range extender device is additionally arranged in a pure electric vehicle, so that the driving range of the vehicle can be increased effectively, the cost of the whole vehicle is not increased too much, and the popularization and the application of the electric vehicle can be facilitated. Meanwhile, the twisting vibration damper is additionally arranged in the range extender device, so that resonance vibration of a transmission system of the range extender device can be avoided, impact is buffered, noise is reduced, and the service life of the range extender device is prolonged.

Description

technical field [0001] The invention belongs to the technical field of electric drive, and relates to a range extender device for an electric vehicle, in particular to a range extender device using a torsional shock absorber. Background technique [0002] With the development of the traditional automobile industry, oil resources are becoming scarce and air quality is deteriorating. In this situation, electric vehicles with obvious energy-saving and environmental protection advantages have become a hot spot in the development of major automobile manufacturers and scientific research institutions in recent years. Electric vehicles are considered to be one of the effective ways to solve the problem of energy shortage and environmental pollution. [0003] However, the development of electric vehicles at this stage still faces several major problems. One is the short driving range. On the one hand, due to the limitations of battery technology, the mileage of most pure electric...

AI Technical Summary

Problems solved by technology

On the one hand, due to the limitations of battery technology, the mileage of most pure electric vehicles is 100-200 kilometers, and it is only obtained from theoretical calculations or bench tests, which is difficult to achieve in actual operating conditions; on the other hand, the charging infrastructure The construction is still far from perfect, which greatly restricts the popularization and use of pure electric vehicles

Second, the cost of electric vehicles is high, and the most important factor affecting the cost is the battery. To increase the mileage of pure electric vehicles, batteries with high performance and capacity must be used, and the cost of electric vehicles will further increase

At present, small piston engines are mostly used in range extenders, and the power output of piston engines fluctuates periodically due to the reciprocating motion of the piston. System resonance or premature fatigue failure

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