CN113978256B - Control method, device and equipment for double DCDC of electric automobile and storage medium - Google Patents
Control method, device and equipment for double DCDC of electric automobile and storage medium Download PDFInfo
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- CN113978256B CN113978256B CN202111327729.6A CN202111327729A CN113978256B CN 113978256 B CN113978256 B CN 113978256B CN 202111327729 A CN202111327729 A CN 202111327729A CN 113978256 B CN113978256 B CN 113978256B
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- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 title claims abstract description 363
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000002159 abnormal effect Effects 0.000 claims abstract description 31
- 238000007599 discharging Methods 0.000 claims description 27
- 238000004590 computer program Methods 0.000 claims description 17
- 230000009977 dual effect Effects 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000007726 management method Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 206010033799 Paralysis Diseases 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
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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
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- 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
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- 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
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- 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
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- 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
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- 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 control method, a device, equipment and a storage medium of double DCDC of an electric automobile, 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 working parameters of the first DCDC and the second DCDC in real time to obtain 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 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 DCDC so as to meet the reliability requirement of the power supply system under each actual working condition.
Description
Technical Field
The invention relates to the technical field of vehicle power supplies, in particular to a control method, a device and equipment for double DCDC of an electric automobile and a storage medium.
Background
DCDC converters are an important part of the power system of electric vehicles, and one important class of their function is to provide the power steering system, the battery and other auxiliary equipment with the required electric power. The other type is in a composite power supply system, is connected with the super capacitor in series, and plays roles 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 in parallel to the low-voltage network of the storage battery A, and when the two storage batteries are consumed, the low-voltage network is paralyzed. The scheme has functional safety requirements for low-voltage load double-power supply requirements and switching devices, and the complexity of the system is increased. When two DCDC are used for power supply, if the two DCDC outputs are respectively arranged in two independent networks, the DCDC output voltages are not mutually interfered, but the load is required to be provided with a double power interface, one storage battery is added, and the complexity of a low-voltage network is improved. If two DCDC outputs are placed in the same network, one DCDC works, the other DCDC is standby, when the DCDC in the work is damaged, the standby DCDC is started, and the standby DCDC is not started before the standby DCDC is started, so that the power of the DCDC in the work needs to be set larger, and the utilization rate of the standby DCDC is lower. Therefore, in order to avoid the limitation of single power supply reliability and low complexity and utilization rate of double power supplies, the invention provides a control method of double DCDC of an electric automobile.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide a control method, a device, equipment and a storage medium for double DCDC of an electric automobile, which can effectively avoid the limitation of single power supply reliability and the complexity of double power supplies, and improve the utilization rate of the double DCDC so as to meet the reliability requirement of a power supply system under each actual working condition.
In order to achieve the above object, an embodiment of the present invention provides a method for controlling dual DCDC 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 working parameters of the first DCDC and the second DCDC in real time to obtain 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 adjusting the working modes of the first DCDC and the second DCDC according to the current working state.
As an improvement of the above 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 abnormal states.
As an improvement of the above 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;
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 overload states.
As an improvement of the above 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;
when the high-voltage power down of the whole vehicle is detected, the current working states of the first DCDC and the second DCDC are judged to be discharging states.
As an improvement of the above solution, the adjusting the working modes of the first DCDC and the second DCDC according to the current working 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 from a constant current mode to a constant voltage 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 the discharging mode.
As an improvement of the above solution, the method further includes:
and when the current working state is an abnormal state, the working mode of the second DCDC is adjusted from a constant-current mode to a constant-voltage mode, and then 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 the double DCDC of the electric automobile, which comprises the following components:
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; 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 from a constant current mode to a constant voltage 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 the 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 control method of the electric automobile double DCDC is realized when the processor executes the computer program.
The embodiment of the invention also provides a computer readable storage medium, which comprises a stored computer program, wherein the computer program is used for controlling equipment where the computer readable storage medium is located to execute the control method of the electric automobile double DCDC.
Compared with the prior art, the control method, the device and the equipment for the double DCDC of the electric automobile and the storage medium have the beneficial effects that: 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 working parameters of the first DCDC and the second DCDC in real time to obtain 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 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 DCDC so as to meet the reliability requirement of the power supply system under each actual working condition.
Drawings
Fig. 1 is a schematic flow chart of a preferred embodiment of a control method of dual DCDC of an electric vehicle according to the present invention;
fig. 2 is a block 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;
fig. 3 is a schematic structural diagram of a preferred embodiment of a control device for dual DCDC of an electric vehicle according to the present invention;
fig. 4 is a schematic structural diagram of a preferred embodiment of a terminal device according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic flow chart of a preferred embodiment of a control method of dual DCDC of an electric vehicle according to the present invention. The control method of the double DCDC of the electric automobile comprises the following steps:
s1, acquiring working parameters of a first DCDC and a 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 working parameters of the first DCDC and the second DCDC in real time to obtain 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 S3, adjusting the working modes of the first DCDC and the second DCDC according to the current working state.
Specifically, the control method of the double DCDC of the electric automobile provided by the embodiment is applied to a power supply system of the double DCDC. Referring to fig. 2, fig. 2 is a block diagram of a dual DCDC in a preferred embodiment of a control method of 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. First, working parameters of the first DCDC and the second DCDC in a normal working state are obtained. When two DCDC outputs are connected in parallel and simultaneously operate 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 a low voltage generates current backflow protection, and finally one DCDC is always in a stop state. In order to avoid current backflow protection, in the normal working state of the embodiment, 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 DCDC in the constant current mode does not generate a high voltage, and thus does not generate a current reverse 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 requirements of the power supply system under each actual working condition.
It should be noted that, the DCDC in this embodiment has four working modes, which are respectively: constant voltage mode, constant current mode, discharge mode, and failure mode.
According to the embodiment, through the cooperation of the working modes of the constant current and the constant voltage of the double DCDC, the limitation of single power supply reliability and the complexity of the double power supply can be effectively avoided, and the utilization rate of the double DCDC is improved, so that the reliability requirement of a power supply system under each actual working condition is met.
In another preferred embodiment, 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 abnormal states.
Specifically, in a 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. 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 abnormal states.
In another preferred embodiment, 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;
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 overload states.
Specifically, in a 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. 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 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.
In another preferred embodiment, 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;
when the high-voltage power down of the whole vehicle is detected, the current working states of the first DCDC and the second DCDC are judged to be discharging states.
Specifically, in a 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 working voltage of the first DCDC is detected in real time, the working current of the second DCDC is detected in real time, and the high-voltage state of the whole vehicle is detected in real time. When the high-voltage power down of the whole vehicle is detected, the current working states of the first DCDC and the second DCDC are judged to be discharge states.
In another preferred embodiment, the adjusting the working modes of the first DCDC and the second DCDC according to the current working 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 from a constant current mode to a constant voltage 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 the discharging mode.
Specifically, in a 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. 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 to be a constant voltage mode from a constant current mode so as to ensure that the power supply system works normally. And if 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 so as to ensure full-force output power. And if 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 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, the working mode of the second DCDC is adjusted from a constant-current mode to a constant-voltage mode, and then 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 for the double DCDC of the electric automobile, which can realize all the flows of the control method for the double DCDC of the electric automobile 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 double DCDC of the electric automobile comprises:
the acquiring module 301 is configured to acquire 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 302 is configured to detect working parameters of the first DCDC and the second DCDC in real time, so as to obtain 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 the adjusting module 303 is 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 abnormal states.
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;
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 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;
when the high-voltage power down of the whole vehicle is detected, the current working states of the first DCDC and the second DCDC are judged to be discharging states.
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 from a constant current mode to a constant voltage 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 the discharging mode.
Preferably, the apparatus further comprises:
and the closing module is used for closing a low-voltage load irrelevant to driving safety by the vehicle energy management system after the working mode of the second DCDC is adjusted from the constant-current mode to the constant-voltage mode when the current working state is an abnormal state so as to ensure that the low voltage can be kept balanced for a long time.
In specific implementation, the working principle, control flow and technical effects of the control device for dual DCDC of an electric vehicle provided by the embodiment of the present invention are the same as those of the control method for dual DCDC of an electric vehicle in the foregoing embodiment, and are not described herein.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a preferred embodiment of a terminal device according to the present invention. The terminal device includes a processor 401, a memory 402, and a computer program stored in the memory 402 and configured to be executed by the processor 401, where the processor 401 executes the computer program to implement the control method of the electric vehicle dual DCDC according to any one of the above embodiments.
Preferably, the computer program may be divided into one or more modules/units (e.g. computer program 1, computer program 2, … …) stored in the memory 402 and executed by the processor 401 to complete the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing the specified functions, which instruction segments are used for describing the execution of the computer program in the terminal device.
The processor 401 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc., which may be microprocessors, or the processor 401 may be any conventional processor, the processor 401 being a control center of the terminal device, with various interfaces and lines connecting the various parts of the terminal device.
The memory 402 mainly includes a program storage area, which may store an operating system, an application program required for at least one function, and the like, and a data storage area, which may store related data and the like. In addition, the memory 402 may be a high-speed random access memory, a nonvolatile memory such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash Card (Flash Card), etc., or the memory 402 may be other volatile solid-state memory devices.
It should be noted that the above-mentioned terminal device may include, but is not limited to, a processor, a memory, and those skilled in the art will understand that the schematic structural diagram of fig. 4 is merely an example of the above-mentioned terminal device, and does not limit the above-mentioned terminal device, and may include more or fewer components than those shown, or may combine some components or different components.
The embodiment of the invention also provides a computer readable storage medium, which comprises a stored computer program, wherein the computer program is used for controlling equipment where the computer readable storage medium is located to execute the control method of the electric automobile double DCDC in any embodiment.
The embodiment of the invention provides a control method, a device, equipment and a storage medium for double DCDC of an electric automobile, wherein the 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 working parameters of the first DCDC and the second DCDC in real time to obtain 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 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 DCDC so as to meet the reliability requirement of the power supply system under each actual working condition.
It should be noted that the system embodiments described above are merely illustrative, and that the units described as separate units may or may not be physically separate, and that units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the system embodiment of the present invention, the connection relationship between the modules represents that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (8)
1. The control method of the double DCDC of the electric automobile is characterized by comprising the following steps of:
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 working parameters of the first DCDC and the second DCDC in real time to obtain 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;
adjusting the working modes of the first DCDC and the second DCDC according to the current working state;
the adjusting the working modes of the first DCDC and the second DCDC according to the current working 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 from a constant current mode to a constant voltage 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 the discharging mode.
2. The method for controlling dual DCDC of an electric vehicle according to claim 1, wherein 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 abnormal states.
3. The method for controlling dual DCDC of an electric vehicle according to claim 1, wherein 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;
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 overload states.
4. The method for controlling dual DCDC of an electric vehicle according to claim 1, wherein 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;
when the high-voltage power down of the whole vehicle is detected, the current working states of the first DCDC and the second DCDC are judged to be discharging states.
5. The method for controlling dual DCDC of an electric vehicle of claim 1, further comprising:
and when the current working state is an abnormal state, the working mode of the second DCDC is adjusted from a constant-current mode to a constant-voltage mode, and then 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.
6. The utility model provides a two DCDC's of electric automobile controlling means which characterized in that includes:
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; the current working state comprises an abnormal state, an overload state and a discharge state;
the adjusting module is used for adjusting the working modes of the first DCDC and the second DCDC according to the current working state;
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 from a constant current mode to a constant voltage 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 the discharging mode.
7. A terminal device comprising a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the control method of electric vehicle double DCDC according to any one of claims 1 to 5 when executing the computer program.
8. A computer readable storage medium, characterized in that the computer readable storage medium comprises a stored computer program, wherein the computer program, when run, controls a device in which the computer readable storage medium is located to execute the method for controlling dual DCDC of an electric vehicle according to any one of claims 1 to 5.
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