A method for controlling a dc-dc converter
A DC-DC and converter technology, applied in the field of controlling DC-DC converters, can solve the problems that plug-in hybrid electric vehicles cannot be directly applied, and the DC-DC converter method is cumbersome, etc., and achieves simple program algorithms and fewer parameters , the effect of reducing energy waste
Active Publication Date: 2019-02-19
CHONGQING CHANGAN AUTOMOBILE CO LTD
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Problems solved by technology
[0004] At present, the control method of the DC-DC converter is relatively mature in the application of medium-hybrid electric vehicles. Fault diagnosis, etc., to finally control the work of the DC-DC converter, so the method of controlling the DC-DC converter is more cumbersome, and, because there is no charger controller in the medium-hybrid system, the control method of the DC-DC converter Not directly applicable to plug-in hybrid vehicles
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[0025] For ease of understanding, the present invention will be further described below in conjunction with the accompanying drawings.
[0026] see figure 1 , is a schematic diagram of a control system for a DC-DC converter provided by an embodiment of the present invention, a power system control unit 1, a battery controller 2, an on-board charger 4, a motor controller 5, and a DC-DC converter A CAN communication network is formed through the CAN line 7, which can interactively collect or transmit control command signals, etc.;
[0027] The power battery 3, the on-board charger 4, the motor controller 5, and the DC-DC converter form a high-voltage circuit through the high-voltage wire harness 8;
[0028] The battery controller 2 is connected to the power battery 3 through a hard wire 9, and can collect relevant signals of the power battery 3. The hard wire 9 is a wire for analog signal input / output.
[0029] The present invention provides a method for controlling a DC-DC co...
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The invention provides a method used for controlling a DC-to-DC converter. The DC-to-DC converter (6) is used for a plug-in hybrid electric vehicle (PHEV). The method combines a high voltage system state, a DC-to-DC fault state, a battery SOC (%), high voltage system discharge power and DC-to-DC consumed power to determine a DC-to-DC working condition. In the case that a whole vehicle system is in different states (a plug-in charging mode and a non-plug-in charging mode), a power system control unit (PCU) gives a control command to allow the DC-to-DC converter to output low voltage values with different levels. The method used for controlling the DC-to-DC converter provided by the invention has the advantages of less parameters and simple logic, and can make a program algorithm more easy. In addition, for different working states of a charger, controlling the DC-to-DC converter to output the low voltage values with the different levels can cause more reasonable use for power and reduce the energy waste.
Description
technical field [0001] The invention relates to the technical field of plug-in hybrid electric vehicles, in particular to a method for controlling a DC-DC converter. Background technique [0002] With the depletion of renewable resources, in order to reduce energy consumption and reduce pollution, the design and development of energy-saving plug-in hybrid electric vehicles and other new energy vehicles have attracted more and more attention from the world's major automobile manufacturers. [0003] As one of the core components of energy-saving new energy vehicles, the DC-DC converter's main function is to convert the DC high voltage of the power battery into a low-voltage DC voltage to supply power for the 12V battery and low-voltage electrical components. [0004] At present, the control method of the DC-DC converter is relatively mature in the application of medium-hybrid electric vehicles. Fault diagnosis, etc., to finally control the work of the DC-DC converter, so the ...
Claims
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IPC IPC(8): B60L15/00B60L15/20B60L3/00
CPCB60L3/0023B60L15/00B60L15/20B60L2210/12B60L2240/527Y02T10/72Y02T90/14
Inventor 熊忠林刘素利宁大伟罗荣华张猛
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD