Charging power-on control method based on battery electric vehicle

Abstract

The invention relates to a charging power-on control method based on a battery electric vehicle. The method comprises the following steps that after receiving an externally-connected high-voltage alternating current, a charger sends a charging awakening signal to a vehicle control unit; the vehicle control unit sends remote frame messages to high-voltage components of a vehicle CAN (Controller Area Network) communication network by virtue of a vehicle network and requests each high-voltage component to supply a feedback signal of whether a severe fault exists; if the feedback signal refers to no fault, the electric quantity of a battery pack is determined to be not full; the charger judges whether a main negative relay and a main positive relay are sucked or not; the vehicle control unit controls the main negative relay and the main positive relay to perform charging control. Charging power-on process time sequence planning is performed on an electric vehicle structure state based on the scheme, so that the whole vehicle can perform a normal operation process.

Description

technical field [0001] The invention belongs to the field of new energy vehicle control systems, and specifically refers to a charging and power-on control method based on pure electric vehicles. Background technique [0002] The development direction of new energy vehicles, as people continue to pay attention to energy security, the development of new energy vehicles has also become the focus of people's increasing attention. In the future, electric vehicles will become the key direction of automotive technology development. The two common working conditions of pure electric vehicles are the driving process, that is, the discharge process of the vehicle battery pack, and the other process is the charging process. [0003] In the prior art, the charging control of the pure electric vehicle platform is mostly realized by software. When the electrical topology of the vehicle is different, the control method of the software will be different. Since the charging process of the ...

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Problems solved by technology

[0003] In the existing technology, the charging control of the pure electric vehicle platform is mostly realized by software. When the electrical topology of the vehicle is different, the software control method will be different.

Since the charging process of the whole vehicle is accompanied by the working state machine of the high-voltage system, the self-inspection of the status of the whole vehicle must be completed during the charging and power-on process. description of the process

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