An electric vehicle driven by multiple power sources and multiple motors

Abstract

The invention discloses an electric automobile powered by multiple power supplies and driven by multiple motors and relates to the field of electric automobiles. The electric automobile comprises a body, wheels installed at the bottom of the body, and a multi-power-supply power supply and multi-motor driving device connected with the wheels, wherein the multi-power-supply power supply and multi-motor driving device comprises a main management system, a motor main controller, a transmission device and m independent power systems, wherein m is an integer which is greater than or equal to 1; the main management system is connected with the independent power system and the motor main controller, the independent power systems are respectively connected with the motor main controller and the transmission device, any two independent systems are connected in parallel, and the transmission device is connected with the wheels. The electric automobile powered by multiple power supplies and driven by multiple motors solves the problem of the power supply system which restricts the development of the electric automobiles, and has the advantages of simple technique, low threshold and easiness in standardization.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to an electric vehicle powered by multiple power sources and driven by multiple motors. Background technique [0002] With the continuous improvement of people's lives, cars have become a means of transportation for more and more people. It makes communication between people easier and more convenient, makes people's travel radius wider, and speeds up the flow of people and goods. However, the exhaust gas of fuel vehicles now causes serious environmental pollution, exacerbating the global fuel crisis and environmental pollution. [0003] The emergence of electric vehicles has brought hope to solve the above problems, but at present, electric vehicles use high-voltage single motor drive or high-voltage multiple motors to directly drive the wheels, which have the following disadvantages: ①. A single motor cannot take into account both speed and torque. It’s fast, the torque is not bi...

AI Technical Summary

Problems solved by technology

But now the fuel vehicle exhaust is causing serious environmental pollution, exacerbating the global fuel crisis and environmental pollution

[0003] The emergence of electric vehicles has brought hope to solve the above problems, but at present, electric vehicles use high-voltage single motor drive or high-voltage multiple motors to directly drive the wheels, which have the following disadvantages: ①. A single motor cannot take into account both speed and torque. It’s fast, the torque is not big enough, and the speed is not fast enough if the torque is large; ②, the production cost of high-power brushless motor controllers is very high, and the production is difficult; ③, the current high-power motors are all using high-voltage mode (300V -400V), requiring a very large number of batteries connected in series (often more than 100 series), the more batteries connected in series, the higher the requirements for the consistency of the batteries, the higher the requirements for the battery management system, technology and safety hazards become global ④. Existing multi-motor drives drive a wheel independently for each motor, which has the problem of drive synchronization; ⑤. Existing high-voltage battery charging technology requires high requirements, requiring special charging equipment, and the investment is huge; Battery replacement is inconvenient; ⑥. The existing electric vehicle power supply is a multi-series parallel combination of a large number of single batteries through multi-modules. Taking the 18650 lithium-ion battery as an example, a combination generally contains 6000-8000 Single battery, hundreds of battery modules, if there is a problem with a single battery or a battery module, the usage rate will be greatly reduced

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