Remote security control system and method for vehicle-mounted air conditioner of new energy vehicles

Abstract

The invention discloses a remote safety control system and method for a vehicle-mounted air conditioner of a new energy vehicle. The system includes: a mobile terminal, which is connected to a T-BOX for remote communication, and the T-BOX is connected to a PTC controller through a CAN line, and the PTC controls The controller communicates with the battery management system BMS through the CAN line, the battery management system BMS communicates with the main negative relay, the pre-charging relay and the main positive relay, and the PTC controller connects with the air conditioning control system CLM and the motor controller MCU through the CAN line. During the period when the remote heating control of the air conditioner starts and cancels the heating, the PTC controller is in the remote control mode and temporarily takes over part of the control functions of the VCU, such as: sending commands to the BMS to connect and disconnect the battery, and sending commands to the MCU to enter the active discharge mode and Enter the sleep mode command, after the PTC controller exits the remote control mode, it does not have part of the control functions of the above VCU. Thereby avoiding the PTC controller and the VCU control function intersection in the normal driving process, resulting in control confusion.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicles, and more specifically, the invention relates to a remote safety control system and method for a vehicle-mounted air conditioner of a new energy vehicle. Background technique [0002] Different from traditional fuel vehicles that use engine waste heat to heat the interior passenger compartment, new energy vehicles use PTC controllers and cooperate with CLM (air conditioning control system) to heat the air in the passenger compartment to meet the needs of interior heating and defrosting and defogging. [0003] In the cold season, when the vehicle is just started and the air conditioner is turned on, the temperature in the passenger compartment will not immediately reach a comfortable temperature. Therefore, the realization of the remote air conditioner heating function of new energy vehicles can make the passengers in the car have a better driving experience in winter feel. In new ener...

AI Technical Summary

Problems solved by technology

[0004] The existing vehicle air conditioner remote control technology requires the vehicle controller VCU to receive the remote control command sent by the T-box first, and then the VCU analyzes it and then sends the control command to the PTC controller. The VCU is responsible for information interaction and control The center of the system, the signal interaction process is longer, which increases the probability of communication errors and the static power consumption of the vehicle's low-voltage battery

And in the process of this control method, the vehicle controller VCU is in a fully activated state, that is, the vehicle is in a fully activated state, which may easily cause vehicle misoperation or unrelated personnel to enter the vehicle, posing safety risks

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