Startup control method and startup control system of electric vehicle, and electric vehicle having same

Abstract

The invention discloses a startup control method and a startup control system of an electric vehicle, and the electric vehicle having the same. The system comprises a power battery, a positive pole contactor, a prefilled contactor, a prefilled resistor, a negative pole contactor, a storage battery, a vehicle management system (VMS), a DC / DC converter, a relay and a battery management system (BMS). The DC / DC converter is used for powering the storage battery and the VMS after performing conversion according to the voltage of the storage battery; the relay is used for controlling the DC / DC converter; the BMS is used for controlling the contactors to be closed when the storage battery is in lack of power and converting the voltage of the power battery into a low voltage control signal to control the relay to be closed, to enable the DC / DC converter to work. According to the system disclosed by the embodiment of the invention, when the storage battery is in lack of power, the voltage between the positive pole and the negative pole of the power battery is acquired and converted into the low voltage control signal to control the positive pole contactor, the prefilled contactor and the negative pole contactor to be closed, the DC / DC converter is activated, low-voltage electrical appliances of the vehicle are guaranteed to perform normal work, and the problem of static current of the vehicle is effectively solved.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a starting control method and system of an electric vehicle and an electric vehicle having the same. Background technique [0002] In order to solve the problem that the low-voltage battery loses power due to high static current and long-term storage of the vehicle, so that the vehicle cannot be started normally, the main method in the related technology is to reduce or cut off the static consumption, such as increasing the main switch of the power supply, and immediately after the power is turned off. Turn off the main switch of the power supply to cut off the connection between the low-voltage battery and the electrical load; for example, add an air switch to the load circuit that is determined to have a large current, and actively turn off the air switch when the driver leaves, so as to solve the problem of the static current of the vehicle. [0003] However, no matter which ...

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Problems solved by technology

[0003] However, no matter which method is adopted, the relevant technology cannot completely solve the problem of low-voltage battery power loss

With the development of electronic technology, the number of control units on the vehicle is gradually increasing, which will inevitably increase the quiescent current. However, the method of adding the main power switch and the air switch requires human control. However, human factors are uncontrollable and cannot be well controlled. Solve the problem of static current of the whole vehicle

In other words, simply controlling the static power consumption and manually cutting off the connection of the low-voltage battery cannot fundamentally solve the problem

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