48V energy management method and system based on plateau long-term climbing working condition and vehicle

Abstract

The invention provides a 48V energy management method and system based on a plateau long-term climbing working condition and a vehicle. The 48V energy management method based on the plateau long-term climbing working condition comprises the following steps that road condition variable parameters are set; when the vehicle accelerates, the motor calls motor power-assisted torque according to different road condition variable parameters so as to start a power-assisted mode; and when the power-assisted mode is finished and the charge capacity of the battery is lower than a set threshold value, starting a driving power generation mode to supplement the battery power so that the charge capacity of the battery is greater than the set threshold value. According to the 48V energy management method based on the plateau long-term climbing working condition, the driving power generation mode is started after the motor completes assistance, the consistency of the driving feeling of a driver can be guaranteed, and the overtaking safety of the vehicle can be improved.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a 48V energy management method, system and vehicle based on a long-term plateau working condition. Background technique [0002] With the gradual tightening of energy conservation and emission reduction policies, hybrid new energy vehicles have become the main development direction of major OEMs. Among the many hybrid configurations, the 48V-P0 configuration is favored by major OEMs because of its low development cost and high cost performance under the premise of satisfying certain performance. The 48V hybrid technology can realize multiple functions such as intelligent start-stop, power generation, power assist, and braking energy recovery. In particular, the motor assist function can improve the drivability of the vehicle. [0003] However, in the long-term climbing conditions in the plateau, the supercharging effect of the engine itself is greatly reduced, and the power per...

AI Technical Summary

Problems solved by technology

However, this control strategy is suitable for plain pavement, not suitable for long-term climbing conditions on plateaus

Because the long-term climbing conditions on the plateau will frequently use the motor for long-term assistance, which will consume more power from the high-voltage battery, and the power of the battery is limited, which will bring different acceleration and power-assist conditions, resulting in real-time acceleration and expected acceleration. Different, it may pose a safety risk when overtaking on a plateau

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