An energy management method for a series hybrid system

A hybrid power system and energy management technology, applied in the field of vehicles, can solve the problems of lack of dual/multiple auxiliary power unit energy management strategies, lack of auxiliary power unit energy management strategies, etc., to achieve clear and simple rules, good energy saving effect, and low fuel consumption Effect

Active Publication Date: 2021-06-01
TSINGHUA UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] The energy management strategy determines the power or torque distribution mode between different power sources of a hybrid vehicle, which is the key to the control of a hybrid vehicle. The configuration described in CN201510906845.1 belongs to a series hybrid system, where the number of auxiliary power units may be However, in previous studies on energy management strategies for series hybrid power systems, there is only an energy management strategy for a single auxiliary power unit, and there is still a lack of energy management strategies for dual / multiple auxiliary power units
[0007] The purpose of the present invention is to solve the problem of lack of energy management strategies for dual / multi-auxiliary power units

Method used

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  • An energy management method for a series hybrid system
  • An energy management method for a series hybrid system
  • An energy management method for a series hybrid system

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Embodiment Construction

[0077] The energy management method of a series hybrid power system according to the present invention is specifically used for the energy management of a hybrid vehicle. The power system of the vehicle includes an auxiliary power system and an energy storage system, and both the auxiliary power system and the energy storage system are connected through the power bus The drive motor controller is connected, the auxiliary power system includes two or more sets of auxiliary power units APU, and the energy storage system includes multiple sets of power batteries.

[0078] The energy management of the vehicle power system is realized through the following steps.

[0079] Step S1. Determine the efficiency characteristic map of the APU and the maximum efficiency curve of the APU.

[0080] Each operating point of the engine is determined by its speed and torque, and each operating point corresponds to an engine’s equivalent fuel consumption rate b e (g / kWh), the universal characteri...

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Abstract

The present invention provides an energy management method for the dual / multiple auxiliary power unit series hybrid power system, including the power distribution between each set of auxiliary power units APU and each set of power batteries and the power distribution inside each set of auxiliary power units And the steps of determining the above power allocation manner. For a given total power demand P demand , to determine the sum of the output power of each APU P APU In order to realize the power distribution between each set of auxiliary power units and each set of power batteries, and for the sum of the output power of each APU P APU Any value of , determine the corresponding APU target output power P APU,i , and the operating point of the engine under this power, in order to control the engine and generator of the APU.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a vehicle hybrid power system and its control. Background technique [0002] With the increasingly prominent energy and environmental issues, new energy vehicles have gained the attention and promotion of various countries, major companies and research institutions. Driven by the demand for reducing energy consumption and emissions, new energy vehicles have also begun to be gradually extended to commercial vehicles. field. [0003] Due to the large mass of commercial vehicles, the driving range of pure electric configurations is limited, and a battery with a large amount of power needs to be equipped, which brings problems such as high cost, small cargo space, and high center of mass of the vehicle. Hybrid power has become the current commercial vehicle An important technical route for electrification. [0004] At present, there are various hybrid configurations such as series...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W10/06B60W10/08B60W10/26B60W20/10
CPCB60W10/06B60W10/08B60W10/26B60W20/10Y02T10/62
Inventor 胡家毅李建秋李航徐梁飞欧阳明高
Owner TSINGHUA UNIV
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