Management method for electric quantity of storage battery for extended range type electric automobile

Abstract

The invention relates to a management method for electric quantity of a storage battery for an extended range type electric automobile. The method comprises the following steps of: (1) calculating the driving time T of the automobile according to residual electrical quantity of a battery in a battery management system (BMS) and the current driving speed of the automobile; and calculating the timeT2 required for a charger to charge according to the set target mileage, the residual electrical quantity of the battery in the BMS, the charging power of the charger and the current driving speed ofthe automobile; and (2) if the difference between the time T1 and the time T2 is positioned within a set time threshold for starting the engine, starting the engine for charging, wherein the chargingtime is T2. According to the storage battery electric quantity management method disclosed by the invention, the time required for charging and proper time for starting the engine can be accurately judged so as to provide enough guarantee for controlling the residual electrical quantity of the storage battery and ensuring the finish of the target mileage.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a battery power management method for an extended-range electric vehicle. [0002] Background technique [0003] At present, range-extended vehicles are still relatively new models, and the control of the start-stop time of the vehicle-mounted engine is still blank. Since it is impossible to clearly understand the charging time required to complete the target mileage and the remaining battery power can be maintained, the status quo is The charging time of the engine can only be manually started based on experience, and the charging time is also an empirical value. It can be seen that it is very urgent and necessary to design a system that can accurately determine how long it takes to charge and when to start the engine charging. [0004] Contents of the invention [0005] The object of the present invention is to provide a storage battery power management method of an extende...

AI Technical Summary

Problems solved by technology

[0003] At present, range-extended vehicles are still relatively new models, and the control of the start-stop time of the vehicle-mounted engine is still blank. Since it is impossible to clearly understand the charging time required to complete the target mileage and the remaining battery power can be maintained, the status quo is You can only rely on experience to manually start the engine charging, and the charging time is also an experience value. It can be seen that it is very urgent and necessary to design a system that can accurately determine how much time needs to be charged and when to start the engine charging.

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