Plug-in hybrid electric vehicle energy management method and system

Abstract

The invention discloses a plug-in hybrid electric vehicle energy management method and system. The management method includes the steps that the historical vehicle speed of a target vehicle is obtained; a traveling route of the target vehicle is obtained and sampled section by section, and real-time traffic information streams of all road sections are acquired; according to the traffic informationstreams, a long-term battery state-of-charge track of the target vehicle is calculated; based on a neural network model, the short-term future vehicle speed is predicted according to the historical vehicle speed of the vehicle; and according to the long-term battery state-of-charge track and the short-term predicted vehicle speed, distribution management is conducted on vehicle-mounted energy source power output. By the adoption of the provided management method and system, the calculation time of plug-in hybrid electric vehicle energy management can be shortened, and the instantaneity of theenergy management method and the vehicle energy consumption economical efficiency are improved.

Description

technical field [0001] The invention relates to the field of battery energy management, in particular to a plug-in hybrid vehicle energy management method and system. Background technique [0002] The battery energy management strategy often used under unknown working conditions is the charge depleting and charge sustaining strategy (CDCS). Compared with dynamic programming (DP) under known global working conditions, the battery state of charge There are significant differences in State Of Charge (SOC) trajectories, and fuel consumption can increase by more than 30%. Therefore, with the convenience of obtaining traffic information, it is necessary to propose a Model Predictive Control (MPC) strategy based on the obtained vehicle speed information to make the SOC trajectory closer to the DP trajectory, thereby improving the efficiency of plug-in hybrid electric vehicles. (Plug-in Hybrid Electric Vehicle, PHEV) fuel economy. [0003] The current MPC strategy usually uses a c...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a plug-in hybrid electric vehicle energy management method and system to solve the problem of large amount of calculation, low real-time performance and inability to fully tap the overall situation when using the current MPC strategy to manage plug-in hybrid electric vehicle energy. The problem of energy consumption and economic performance

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