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Novel control method of power system of double-motor and double-drive-axle electric vehicle

A technology of a power system and a control method is applied in the control field of the power system of a dual-motor dual-drive-axle pure electric vehicle, and can solve the problems of limiting the space for improving the comprehensive performance of the whole vehicle.

Inactive Publication Date: 2015-04-01
SHANDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the power control algorithm of purely front-wheel drive or rear-wheel drive cannot perform real-time adjustment of two-wheel drive, four-wheel drive, two-wheel brake, and four-wheel brake working modes according to the vehicle's operating conditions, which limits the overall performance of the vehicle. room for further improvement

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  • Novel control method of power system of double-motor and double-drive-axle electric vehicle
  • Novel control method of power system of double-motor and double-drive-axle electric vehicle
  • Novel control method of power system of double-motor and double-drive-axle electric vehicle

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Embodiment Construction

[0022] Below in conjunction with accompanying drawing, the novelty of the present invention will be further described.

[0023] figure 1 The vehicle control system structure of a pure electric vehicle with dual motors and dual drive shafts includes: vehicle controller, power control system, battery management system, power battery, front final drive, front differential, rear final drive, rear Differential, front and rear wheels. Among them, the vehicle controller includes a driver's intention recognition module and a vehicle operating condition judgment module, and the power control system includes a front axle motor controller, a rear axle motor controller, a front axle motor, and a rear axle motor.

[0024] figure 2 The vehicle power control process of a pure electric vehicle with dual motors and dual drive shafts includes: a driver intention recognition module, a vehicle operating condition judgment module, and a power control system. Identify the driver's intention and...

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Abstract

The invention provides a novel control method of a power system of a double-motor and double-drive-axle electric vehicle. The method is characterized in that a reasonable motor working mode can be selected according to the vehicle running condition, so as to achieve the optimal power output of motors of the vehicle under different power demand conditions. With the adoption of the novel control method of the power system of the double-motor and double-drive-axle electric vehicle, the vehicle can be gentlely started by a single-axle and double-wheel manner and fast started by a double-axle and four-wheel manner according to the starting conditions, and therefore, the requirement on power for starting of the vehicle can be ensured; the vehicle can be driven by a single-axle front-wheel manner, driven by a single-axle and rear-wheel manner or driven by a double-axle and four-wheel manner according to the cruising condition, so that the efficient running of a motor system is ensured; the vehicle can be regeneratively braked by means of one motor under a small braking strength according to the braking condition, and thus the braking load rte of the motor can be raised; in addition, the vehicle can also be regeneratively braked by a double-motor and four-wheel manner under a medium- and high-medium braking strength, and therefore, the recovery rate of the regenerative braking energy can be raised; the reasonable motor working mode can be selected to according to the limping condition of the vehicle, so as to drive the vehicle to continuously move.

Description

technical field [0001] The invention belongs to the field of electric vehicle power control, and relates to a control method for a pure electric vehicle power system, in particular to a control method for a pure electric vehicle power system with dual motors and double drive shafts. Background technique [0002] In recent years, facing the dual pressure of energy crisis and environmental pollution, the world's automobile industry is facing strategic transformation, and pure electric vehicles have become one of the strategic development directions of my country's automobile industry. At present, pure electric vehicles are in the initial stage of industrialization, and single-motor single-axis drive structure schemes are more common. Based on such technical solutions, a lot of research has been carried out on the control method of the vehicle power system at home and abroad, and there are relatively mature single-axis drive pure electric vehicle products on the market. Howeve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/00B60L15/20
CPCY02T10/72
Inventor 高松孙宾宾高子超杨坤
Owner SHANDONG UNIV OF TECH
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