Energy management control method of vehicle hybrid power supply based on nonlinear programming

A technology of nonlinear programming and hybrid power supply, which is applied in battery/fuel cell control devices, vehicle energy storage, current collectors, etc. It can solve the problems that the energy of batteries and supercapacitors cannot be reasonably managed and controlled, and achieve the effect of reducing irregularities

Active Publication Date: 2020-07-28
JIANGSU UNIV OF TECH
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Problems solved by technology

[0004] Aiming at the deficiencies of the above-mentioned prior art, the present invention provides a non-linear programming-based energy management and control method for a vehicle-mounted hybrid power supply, which effectively solves the technical problem that the energy between the storage battery and the supercapacitor in the existing hybrid power supply cannot be reasonably managed and controlled

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  • Energy management control method of vehicle hybrid power supply based on nonlinear programming
  • Energy management control method of vehicle hybrid power supply based on nonlinear programming
  • Energy management control method of vehicle hybrid power supply based on nonlinear programming

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Embodiment Construction

[0017] In order to make the content of the present invention clearer and easier to understand, the content of the present invention will be further described below in conjunction with the accompanying drawings. Of course, the present invention is not limited to this specific embodiment, and general replacements known to those skilled in the art are also covered within the protection scope of the present invention.

[0018] Based on the technical problem that the energy between the storage battery and the supercapacitor in the prior art hybrid power supply cannot be reasonably managed and controlled, the present invention provides an energy management and control method for a vehicle-mounted hybrid power supply based on nonlinear programming. like figure 1 Shown is a schematic diagram of the electric vehicle hybrid power drive system. It can be seen from the figure that the hybrid power supply includes a battery for providing energy and a supercapacitor for providing power, and...

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Abstract

The invention discloses a non-linear programming-based energy management and control method for a vehicle-mounted hybrid power supply, comprising: establishing a model of a storage battery and a super capacitor; Establish the second objective function based on the internal charge and discharge energy; set the voltage constraints of the supercapacitor and the current constraints of the supercapacitor on the DC bus side, and minimize the capacity of the supercapacitor according to the voltage constraints of the supercapacitor; establish based on nonlinear programming theory The third objective function and its constraints; construct the Lagrangian function, obtain the DC bus current in real time, solve the Lagrangian function based on the convexity assumption, and use its optimal solution as the reference current output by the battery to ensure that the battery Work in a constant current mode, control the battery to meet the energy demand of the electric vehicle load, and the supercapacitor to provide the power demand of the load.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to an energy management and control method for a vehicle-mounted hybrid power supply. Background technique [0002] With the advantages of energy saving, environmental protection and high efficiency, electric vehicles have become a strong support for the transition of the automotive industry to a sustainable development strategy. However, the current batteries used in electric vehicles still cannot fully meet the frequently changing high power requirements in driving conditions, resulting in a greatly reduced cycle life of the batteries. If energy storage devices that support high peak power, such as supercapacitors, are applied to electric vehicles alone, due to the low performance of supercapacitors in terms of energy density, the driving range of the entire vehicle will be very limited. Based on this, combining high-energy-density batteries and high-power-density supercapacito...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/34B60L58/10
CPCY02T10/70
Inventor 王琪韩晓新诸一琦罗印升
Owner JIANGSU UNIV OF TECH
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