CN113978256A - Control method, device, equipment and storage medium for double DCDCDCDCCs of electric vehicle - Google Patents

Control method, device, equipment and storage medium for double DCDCDCDCCs of electric vehicle Download PDF

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Publication number
CN113978256A
CN113978256A CN202111327729.6A CN202111327729A CN113978256A CN 113978256 A CN113978256 A CN 113978256A CN 202111327729 A CN202111327729 A CN 202111327729A CN 113978256 A CN113978256 A CN 113978256A
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dcdc
working
mode
current
state
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CN113978256B (en
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陈飞
卢艳彬
曹阳
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China Express Jiangsu Technology Co Ltd
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China Express Jiangsu Technology Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/003—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/10—Parallel operation of dc sources
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/10—Parallel operation of dc sources
    • H02J1/102—Parallel operation of dc sources being switching converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/10—Parallel operation of dc sources
    • H02J1/106—Parallel operation of dc sources for load balancing, symmetrisation, or sharing
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The invention discloses a method, a device, equipment and a storage medium for controlling double DCDCDCDCDs of an electric vehicle, wherein the method comprises the following steps: acquiring working parameters of the first DCDC and the second DCDC in a normal working state; the first DCDC and the second DCDC are connected in parallel, and in the normal working state, the working mode of the first DCDC is a constant voltage mode, and the working mode of the second DCDC is a constant current mode; detecting the working parameters of the first DCDC and the second DCDC in real time to obtain the current working states of the first DCDC and the second DCDC; wherein the current working state comprises an abnormal state, an overload state and a discharge state; and adjusting the working modes of the first DCDC and the second DCDC according to the current working state. The invention can effectively avoid the limitation of single power supply reliability and the complexity of double power supplies, and improve the utilization rate of double DCDCDCDCDC so as to meet the requirement of power supply system reliability under each actual working condition.

Description

Control method, device, equipment and storage medium for double DCDCDCDCCs of electric vehicle
Technical Field
The invention relates to the technical field of vehicle power supplies, in particular to a method, a device, equipment and a storage medium for controlling double DCDCDCDCDCDs of an electric vehicle.
Background
The DCDC converter is an important part of an electric vehicle power system, and an important function of the DCDC converter is to provide required electric power for a power steering system, a storage battery and other auxiliary equipment. The other type of the voltage stabilizing circuit is present in a composite power supply system and is connected with a super capacitor in series to play a role in regulating power supply output and stabilizing bus voltage.
When one DCDC is used for supplying power, if the DCDC is damaged, the storage battery B is connected to the low-voltage network of the storage battery A in parallel, and when the two storage batteries are completely consumed, the low-voltage network is paralyzed. The scheme has the requirement of dual power supply for low-voltage loads and the requirement of functional safety of a switching device, and increases the complexity of the system. When two DCDCDCs are used for supplying power, if the two DCDC outputs are respectively arranged in two independent networks, the DCDC output voltages are not interfered with each other, but the load needs to be provided with a dual-power interface and is provided with one more storage battery, so that the complexity of a low-voltage network is improved. If two DCDC outputs are arranged in the same network, one DCDC works and the other DCDC is standby, when the working DCDC is damaged, the standby DCDC can be started, and the standby DCDC is not started before the working DCDC is started, so that the power of the working DCDC needs to be set to be larger, and the utilization rate of the standby DCDC is lower. Therefore, in order to avoid the limitation of single power supply reliability and the low complexity and utilization rate of double power supplies, the invention provides a control method of double DCDCDCDs of an electric vehicle.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is to provide a method, an apparatus, a device and a storage medium for controlling dual DCDCs of an electric vehicle, which can effectively avoid the limitation of single power supply reliability and the complexity of dual power supplies, and improve the utilization rate of the dual DCDCs, so as to meet the requirement of power supply system reliability under each actual working condition.
In order to achieve the above object, an embodiment of the present invention provides a method for controlling dual DCDCs of an electric vehicle, including:
acquiring working parameters of the first DCDC and the second DCDC in a normal working state; the first DCDC and the second DCDC are connected in parallel, and in the normal working state, the working mode of the first DCDC is a constant voltage mode, and the working mode of the second DCDC is a constant current mode;
detecting the working parameters of the first DCDC and the second DCDC in real time to obtain the current working states of the first DCDC and the second DCDC; wherein the current working state comprises an abnormal state, an overload state and a discharge state;
and adjusting the working modes of the first DCDC and the second DCDC according to the current working state.
As an improvement of the foregoing solution, the detecting the working parameters of the first DCDC and the second DCDC in real time to obtain the current working states of the first DCDC and the second DCDC specifically includes:
detecting the working voltage of the first DCDC in real time, and detecting the working current of the second DCDC in real time;
when the working voltage of the first DCDC is detected to be zero, the first DCDC is judged to be in an abnormal state, and then the current working states of the first DCDC and the second DCDC are in the abnormal state.
As an improvement of the foregoing solution, the detecting the working parameters of the first DCDC and the second DCDC in real time to obtain the current working states of the first DCDC and the second DCDC specifically includes:
detecting the working voltage of the first DCDC in real time, and detecting the working current of the second DCDC in real time;
when the working voltage of the first DCDC and the working current of the second DCDC are detected to be larger than the preset maximum output capacity, the current working states of the first DCDC and the second DCDC are judged to be overload states.
As an improvement of the foregoing solution, the detecting the working parameters of the first DCDC and the second DCDC in real time to obtain the current working states of the first DCDC and the second DCDC specifically includes:
detecting the working voltage of the first DCDC in real time, detecting the working current of the second DCDC in real time, and detecting the high-voltage state of the whole vehicle in real time;
and when the voltage of the whole vehicle under high voltage is detected, judging that the current working state of the first DCDC and the second DCDC is a discharging state.
As an improvement of the foregoing solution, the adjusting the operating modes of the first DCDC and the second DCDC according to the current operating state specifically includes:
when the current working state is an abnormal state, the working mode of the first DCDC is adjusted to be a fault mode, and the working mode of the second DCDC is adjusted to be a constant-voltage mode from a constant-current mode;
when the current working state is an overload state, the working mode of the first DCDC is adjusted from a constant voltage mode to a constant current mode, and the working mode of the second DCDC is still kept to be the constant current mode;
and when the current working state is a discharging state, the working mode of the first DCDC is adjusted from a constant voltage mode to a discharging mode, and the working mode of the second DCDC is adjusted from a constant current mode to a discharging mode.
As an improvement of the above, the method further comprises:
and when the current working state is an abnormal state, after the working mode of the second DCDC is adjusted from a constant current mode to a constant voltage mode, the vehicle energy management system closes a low-voltage load irrelevant to driving safety so as to ensure that the low voltage can be kept balanced for a long time.
The embodiment of the invention also provides a control device of double DCDCDCDC of an electric automobile, which comprises:
the acquisition module is used for acquiring working parameters of the first DCDC and the second DCDC in a normal working state; the first DCDC and the second DCDC are connected in parallel, and in the normal working state, the working mode of the first DCDC is a constant voltage mode, and the working mode of the second DCDC is a constant current mode;
the detection module is used for detecting the working parameters of the first DCDC and the second DCDC in real time to obtain the current working states of the first DCDC and the second DCDC; wherein the current working state comprises an abnormal state, an overload state and a discharge state;
and the adjusting module is used for adjusting the working modes of the first DCDC and the second DCDC according to the current working state.
Further, the adjusting module is specifically configured to:
when the current working state is an abnormal state, the working mode of the first DCDC is adjusted to be a fault mode, and the working mode of the second DCDC is adjusted to be a constant-voltage mode from a constant-current mode;
when the current working state is an overload state, the working mode of the first DCDC is adjusted from a constant voltage mode to a constant current mode, and the working mode of the second DCDC is still kept to be the constant current mode;
and when the current working state is a discharging state, the working mode of the first DCDC is adjusted from a constant voltage mode to a discharging mode, and the working mode of the second DCDC is adjusted from a constant current mode to a discharging mode.
The embodiment of the invention also provides a terminal device, which comprises a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, wherein the processor implements the control method of the electric vehicle dual-DCDC described in any one of the above when executing the computer program.
The embodiment of the invention also provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program runs, the device where the computer-readable storage medium is located is controlled to execute any one of the above methods for controlling dual DCDCs of an electric vehicle.
Compared with the prior art, the method, the device, the equipment and the storage medium for controlling the double DCDCDCDC of the electric vehicle provided by the embodiment of the invention have the beneficial effects that: obtaining working parameters of the first DCDC and the second DCDC in a normal working state; the first DCDC and the second DCDC are connected in parallel, and in the normal working state, the working mode of the first DCDC is a constant voltage mode, and the working mode of the second DCDC is a constant current mode; detecting the working parameters of the first DCDC and the second DCDC in real time to obtain the current working states of the first DCDC and the second DCDC; wherein the current working state comprises an abnormal state, an overload state and a discharge state; and adjusting the working modes of the first DCDC and the second DCDC according to the current working state. The invention can effectively avoid the limitation of single power supply reliability and the complexity of double power supplies, and improve the utilization rate of double DCDCDCDCDC so as to meet the requirement of power supply system reliability under each actual working condition.
Drawings
FIG. 1 is a schematic flow chart of a control method for dual DCDCDCDs of an electric vehicle according to a preferred embodiment of the present invention;
FIG. 2 is a structural diagram of a dual DCDC in a preferred embodiment of a method for controlling a dual DCDC of an electric vehicle according to the present invention;
FIG. 3 is a schematic structural diagram of a control device of dual DCDCDCDs of an electric vehicle according to a preferred embodiment of the present invention;
fig. 4 is a schematic structural diagram of a preferred embodiment of a terminal device provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic flowchart illustrating a method for controlling dual DCDC of an electric vehicle according to a preferred embodiment of the present invention. The control method of the electric automobile dual DCDC comprises the following steps:
s1, acquiring working parameters of the first DCDC and the second DCDC in a normal working state; the first DCDC and the second DCDC are connected in parallel, and in the normal working state, the working mode of the first DCDC is a constant voltage mode, and the working mode of the second DCDC is a constant current mode;
s2, detecting the working parameters of the first DCDC and the second DCDC in real time to obtain the current working states of the first DCDC and the second DCDC; wherein the current working state comprises an abnormal state, an overload state and a discharge state;
and S3, adjusting the working modes of the first DCDC and the second DCDC according to the current working state.
Specifically, the control method for dual DCDC of an electric vehicle provided by the embodiment is applied to a power supply system of dual DCDC. Referring to fig. 2, fig. 2 is a structural diagram of a dual DCDC in a preferred embodiment of a control method of a dual DCDC of an electric vehicle according to the present invention. The first DCDC and the second DCDC are connected in parallel, and the output side is connected with a storage battery and a load. Firstly, the working parameters of the first DCDC and the second DCDC in the normal working state are obtained. When two DCDC outputs are connected in parallel and simultaneously work in a constant voltage mode, the output voltage of one DCDC is always higher than that of the other DCDC, so that the DCDC at low voltage generates current backflow protection, and finally one DCDC is always in a stop state. In order to avoid the occurrence of current backflow protection, in the normal operating state of this embodiment, the operating mode of the first DCDC is a constant voltage mode, and the operating mode of the second DCDC is a constant current mode. The DCDC in the constant current mode does not generate a high voltage, and thus does not generate a current backward flow to the DCDC in the constant voltage mode. Then, detecting the working parameters of the first DCDC and the working parameters of the second DCDC in real time to obtain the current working states of the first DCDC and the second DCDC; the current working state comprises an abnormal state, an overload state and a discharge state. And finally, adjusting the working modes of the first DCDC and the second DCDC according to the current working state so as to meet the reliability requirement of the power supply system under each actual working condition.
It should be noted that, there are four operation modes of the DCDC in this embodiment, which are respectively: constant voltage mode, constant current mode, discharge mode, and failure mode.
The working mode cooperation of the respective constant current of two DCDCDCs and constant voltage can effectively avoid the reliable limitation of single power and the complexity of dual supply, improves two DCDCDC's utilization ratio to satisfy the electrical power generating system reliability requirement under each operating mode.
In another preferred embodiment, the detecting the operating parameters of the first DCDC and the second DCDC in real time to obtain the current operating states of the first DCDC and the second DCDC specifically includes:
detecting the working voltage of the first DCDC in real time, and detecting the working current of the second DCDC in real time;
when the working voltage of the first DCDC is detected to be zero, the first DCDC is judged to be in an abnormal state, and then the current working states of the first DCDC and the second DCDC are in the abnormal state.
Specifically, in a normal operating state, the operating mode of the first DCDC is a constant voltage mode, and the operating mode of the second DCDC is a constant current mode. And detecting the working voltage of the first DCDC in real time, and detecting the working current of the second DCDC in real time. When the working voltage of the first DCDC is detected to be zero, the first DCDC is judged to be in an abnormal state, and then the current working states of the first DCDC and the second DCDC are in the abnormal state.
In another preferred embodiment, the detecting the operating parameters of the first DCDC and the second DCDC in real time to obtain the current operating states of the first DCDC and the second DCDC specifically includes:
detecting the working voltage of the first DCDC in real time, and detecting the working current of the second DCDC in real time;
when the working voltage of the first DCDC and the working current of the second DCDC are detected to be larger than the preset maximum output capacity, the current working states of the first DCDC and the second DCDC are judged to be overload states.
Specifically, in a normal operating state, the operating mode of the first DCDC is a constant voltage mode, and the operating mode of the second DCDC is a constant current mode. And detecting the working voltage of the first DCDC in real time, and detecting the working current of the second DCDC in real time. And when the working voltage of the first DCDC and the working current of the second DCDC are detected to be larger than the preset maximum output capacity, judging that the current working states of the first DCDC and the second DCDC are the overload state.
In another preferred embodiment, the detecting the operating parameters of the first DCDC and the second DCDC in real time to obtain the current operating states of the first DCDC and the second DCDC specifically includes:
detecting the working voltage of the first DCDC in real time, detecting the working current of the second DCDC in real time, and detecting the high-voltage state of the whole vehicle in real time;
and when the voltage of the whole vehicle under high voltage is detected, judging that the current working state of the first DCDC and the second DCDC is a discharging state.
Specifically, in a normal operating state, the operating mode of the first DCDC is a constant voltage mode, and the operating mode of the second DCDC is a constant current mode. And detecting the working voltage of the first DCDC in real time, detecting the working current of the second DCDC in real time, and detecting the high-voltage state of the whole vehicle in real time. When the voltage of the whole vehicle under high voltage is detected, the current working state of the first DCDC and the second DCDC is judged to be a discharging state.
In another preferred embodiment, the adjusting the operating modes of the first DCDC and the second DCDC according to the current operating state specifically includes:
when the current working state is an abnormal state, the working mode of the first DCDC is adjusted to be a fault mode, and the working mode of the second DCDC is adjusted to be a constant-voltage mode from a constant-current mode;
when the current working state is an overload state, the working mode of the first DCDC is adjusted from a constant voltage mode to a constant current mode, and the working mode of the second DCDC is still kept to be the constant current mode;
and when the current working state is a discharging state, the working mode of the first DCDC is adjusted from a constant voltage mode to a discharging mode, and the working mode of the second DCDC is adjusted from a constant current mode to a discharging mode.
Specifically, in a normal operating state, the operating mode of the first DCDC is a constant voltage mode, and the operating mode of the second DCDC is a constant current mode. And if the current working state is an abnormal state, adjusting the working mode of the first DCDC to be a fault mode, and adjusting the working mode of the second DCDC from a constant-current mode to a constant-voltage mode so as to ensure the normal work of the power supply system. And if the current working state is the overload state, the working mode of the first DCDC is adjusted from the constant-voltage mode to the constant-current mode, and the working mode of the second DCDC is still kept to be the constant-current mode so as to ensure full-force output power. And if the current working state is the discharging state, the working mode of the first DCDC is adjusted from the constant voltage mode to the discharging mode, and the working mode of the second DCDC is adjusted from the constant current mode to the discharging mode, so that the discharging reliability is higher and the discharging speed is higher.
Preferably, the method further comprises:
and when the current working state is an abnormal state, after the working mode of the second DCDC is adjusted from a constant current mode to a constant voltage mode, the vehicle energy management system closes a low-voltage load irrelevant to driving safety so as to ensure that the low voltage can be kept balanced for a long time.
Correspondingly, the invention also provides a control device of the electric vehicle dual-DCDC, which can realize all the processes of the control method of the electric vehicle dual-DCDC in the embodiment.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a control device for dual DCDC of an electric vehicle according to a preferred embodiment of the present invention. The control device of the electric automobile dual DCDC comprises:
an obtaining module 301, configured to obtain working parameters of the first DCDC and the second DCDC in a normal working state; the first DCDC and the second DCDC are connected in parallel, and in the normal working state, the working mode of the first DCDC is a constant voltage mode, and the working mode of the second DCDC is a constant current mode;
a detecting module 302, configured to perform real-time detection on working parameters of the first DCDC and the second DCDC, so as to obtain current working states of the first DCDC and the second DCDC; wherein the current working state comprises an abnormal state, an overload state and a discharge state;
an adjusting module 303, configured to adjust the working modes of the first DCDC and the second DCDC according to the current working state.
Preferably, the detection module 302 is specifically configured to:
detecting the working voltage of the first DCDC in real time, and detecting the working current of the second DCDC in real time;
when the working voltage of the first DCDC is detected to be zero, the first DCDC is judged to be in an abnormal state, and then the current working states of the first DCDC and the second DCDC are in the abnormal state.
Preferably, the detection module 302 is specifically configured to:
detecting the working voltage of the first DCDC in real time, and detecting the working current of the second DCDC in real time;
when the working voltage of the first DCDC and the working current of the second DCDC are detected to be larger than the preset maximum output capacity, the current working states of the first DCDC and the second DCDC are judged to be overload states.
Preferably, the detection module 302 is specifically configured to:
detecting the working voltage of the first DCDC in real time, detecting the working current of the second DCDC in real time, and detecting the high-voltage state of the whole vehicle in real time;
and when the voltage of the whole vehicle under high voltage is detected, judging that the current working state of the first DCDC and the second DCDC is a discharging state.
Preferably, the adjusting module 303 is specifically configured to:
when the current working state is an abnormal state, the working mode of the first DCDC is adjusted to be a fault mode, and the working mode of the second DCDC is adjusted to be a constant-voltage mode from a constant-current mode;
when the current working state is an overload state, the working mode of the first DCDC is adjusted from a constant voltage mode to a constant current mode, and the working mode of the second DCDC is still kept to be the constant current mode;
and when the current working state is a discharging state, the working mode of the first DCDC is adjusted from a constant voltage mode to a discharging mode, and the working mode of the second DCDC is adjusted from a constant current mode to a discharging mode.
Preferably, the apparatus further comprises:
and the closing module is used for adjusting the working mode of the second DCDC from a constant-current mode to a constant-voltage mode when the current working state is an abnormal state, and closing a low-voltage load irrelevant to driving safety by the vehicle energy management system so as to ensure that the low voltage can be kept balanced for a long time.
In a specific implementation, the working principle, the control flow and the technical effect of the control device for dual DCDCs of an electric vehicle according to the embodiment of the present invention are the same as those of the control method for dual DCDCs of an electric vehicle according to the above embodiment, and are not described herein again.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a terminal device according to a preferred embodiment of the present invention. The terminal device comprises a processor 401, a memory 402 and a computer program stored in the memory 402 and configured to be executed by the processor 401, wherein the processor 401 implements the control method of the electric vehicle dual DCDC according to any one of the embodiments when executing the computer program.
Preferably, the computer program may be divided into one or more modules/units (e.g., computer program 1, computer program 2, … …) that are stored in the memory 402 and executed by the processor 401 to implement the invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used for describing the execution process of the computer program in the terminal device.
The Processor 401 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, etc., the general purpose Processor may be a microprocessor, or the Processor 401 may be any conventional Processor, the Processor 401 is a control center of the terminal device, and various interfaces and lines are used to connect various parts of the terminal device.
The memory 402 mainly includes a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function, and the like, and the data storage area may store related data and the like. In addition, the memory 402 may be a high speed random access memory, a non-volatile memory such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash Card (Flash Card), and the like, or the memory 402 may be other volatile solid state memory devices.
It should be noted that the terminal device may include, but is not limited to, a processor and a memory, and those skilled in the art will understand that the structural diagram of fig. 4 is only an example of the terminal device and does not constitute a limitation of the terminal device, and may include more or less components than those shown, or combine some components, or different components.
The embodiment of the invention further provides a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program, and when the computer program runs, the device where the computer-readable storage medium is located is controlled to execute the method for controlling dual DCDCs of an electric vehicle according to any one of the above embodiments.
The embodiment of the invention provides a method, a device, equipment and a storage medium for controlling double DCDCDCDCCs of an electric vehicle, which are characterized in that working parameters of a first DCDC and a second DCDC in a normal working state are obtained; the first DCDC and the second DCDC are connected in parallel, and in the normal working state, the working mode of the first DCDC is a constant voltage mode, and the working mode of the second DCDC is a constant current mode; detecting the working parameters of the first DCDC and the second DCDC in real time to obtain the current working states of the first DCDC and the second DCDC; wherein the current working state comprises an abnormal state, an overload state and a discharge state; and adjusting the working modes of the first DCDC and the second DCDC according to the current working state. The invention can effectively avoid the limitation of single power supply reliability and the complexity of double power supplies, and improve the utilization rate of double DCDCDCDCDC so as to meet the requirement of power supply system reliability under each actual working condition.
It should be noted that the above-described system embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the system provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims (10)

1. A control method for dual DCDCDCDs of an electric vehicle is characterized by comprising the following steps:
acquiring working parameters of the first DCDC and the second DCDC in a normal working state; the first DCDC and the second DCDC are connected in parallel, and in the normal working state, the working mode of the first DCDC is a constant voltage mode, and the working mode of the second DCDC is a constant current mode;
detecting the working parameters of the first DCDC and the second DCDC in real time to obtain the current working states of the first DCDC and the second DCDC; wherein the current working state comprises an abnormal state, an overload state and a discharge state;
and adjusting the working modes of the first DCDC and the second DCDC according to the current working state.
2. The method for controlling dual DCDCs of claim 1, wherein the detecting the operating parameters of the first DCDC and the second DCDC in real time to obtain the current operating states of the first DCDC and the second DCDC specifically comprises:
detecting the working voltage of the first DCDC in real time, and detecting the working current of the second DCDC in real time;
when the working voltage of the first DCDC is detected to be zero, the first DCDC is judged to be in an abnormal state, and then the current working states of the first DCDC and the second DCDC are in the abnormal state.
3. The method for controlling dual DCDCs of claim 1, wherein the detecting the operating parameters of the first DCDC and the second DCDC in real time to obtain the current operating states of the first DCDC and the second DCDC specifically comprises:
detecting the working voltage of the first DCDC in real time, and detecting the working current of the second DCDC in real time;
when the working voltage of the first DCDC and the working current of the second DCDC are detected to be larger than the preset maximum output capacity, the current working states of the first DCDC and the second DCDC are judged to be overload states.
4. The method for controlling dual DCDCs of claim 1, wherein the detecting the operating parameters of the first DCDC and the second DCDC in real time to obtain the current operating states of the first DCDC and the second DCDC specifically comprises:
detecting the working voltage of the first DCDC in real time, detecting the working current of the second DCDC in real time, and detecting the high-voltage state of the whole vehicle in real time;
and when the voltage of the whole vehicle under high voltage is detected, judging that the current working state of the first DCDC and the second DCDC is a discharging state.
5. The method for controlling dual DCDCs of an electric vehicle according to any one of claims 1 to 4, wherein the adjusting the operation modes of the first DCDC and the second DCDC according to the current operation state specifically comprises:
when the current working state is an abnormal state, the working mode of the first DCDC is adjusted to be a fault mode, and the working mode of the second DCDC is adjusted to be a constant-voltage mode from a constant-current mode;
when the current working state is an overload state, the working mode of the first DCDC is adjusted from a constant voltage mode to a constant current mode, and the working mode of the second DCDC is still kept to be the constant current mode;
and when the current working state is a discharging state, the working mode of the first DCDC is adjusted from a constant voltage mode to a discharging mode, and the working mode of the second DCDC is adjusted from a constant current mode to a discharging mode.
6. The method for controlling dual DCDC of an electric vehicle according to claim 5, further comprising:
and when the current working state is an abnormal state, after the working mode of the second DCDC is adjusted from a constant current mode to a constant voltage mode, the vehicle energy management system closes a low-voltage load irrelevant to driving safety so as to ensure that the low voltage can be kept balanced for a long time.
7. A control device for dual DCDCDCDs of an electric vehicle is characterized by comprising:
the acquisition module is used for acquiring working parameters of the first DCDC and the second DCDC in a normal working state; the first DCDC and the second DCDC are connected in parallel, and in the normal working state, the working mode of the first DCDC is a constant voltage mode, and the working mode of the second DCDC is a constant current mode;
the detection module is used for detecting the working parameters of the first DCDC and the second DCDC in real time to obtain the current working states of the first DCDC and the second DCDC; wherein the current working state comprises an abnormal state, an overload state and a discharge state;
and the adjusting module is used for adjusting the working modes of the first DCDC and the second DCDC according to the current working state.
8. The control device of the electric vehicle dual DCDC according to claim 7, wherein the adjusting module is specifically configured to:
when the current working state is an abnormal state, the working mode of the first DCDC is adjusted to be a fault mode, and the working mode of the second DCDC is adjusted to be a constant-voltage mode from a constant-current mode;
when the current working state is an overload state, the working mode of the first DCDC is adjusted from a constant voltage mode to a constant current mode, and the working mode of the second DCDC is still kept to be the constant current mode;
and when the current working state is a discharging state, the working mode of the first DCDC is adjusted from a constant voltage mode to a discharging mode, and the working mode of the second DCDC is adjusted from a constant current mode to a discharging mode.
9. A terminal device, comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor implements the control method of electric vehicle dual DCDC according to any one of claims 1 to 6 when executing the computer program.
10. A computer-readable storage medium, comprising a stored computer program, wherein when the computer program runs, the apparatus where the computer-readable storage medium is located is controlled to execute the control method for dual DCDC of electric vehicle according to any one of claims 1 to 6.
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