CN110103771B - Platformization control method for vehicle-mounted charger of electric vehicle - Google Patents
Platformization control method for vehicle-mounted charger of electric vehicle Download PDFInfo
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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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
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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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/66—Data transfer between charging stations and vehicles
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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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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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
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
-
- 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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
Abstract
The invention discloses a platformization control method for a vehicle-mounted charger of an electric vehicle, which comprises the following steps of: normally and slowly charging; judging whether the single voltage reaches a full-charge condition or not; if yes, entering a step of preparing to stop slow charging; in the step, whether the slow charging conditions of various vehicle types are met is judged; the vehicle-mounted charger reports the charging state as charging completion; the BMS controls the slow charging relay to be switched off; and finishing slow charging. By adopting the technical scheme, the electric automobiles of the same type and different driving mileage configurations are completely compatible. Therefore, the risk generated in the assembling and maintaining process can be effectively reduced, and unnecessary reworking is reduced; on the premise that the current and the voltage of the battery system have differences, the charger CAN still accurately send out a charging completion CAN message according to the requirements of related landmarks, and CAN be compatible with the mass production projects in the early stage; the research and development cost and the production cost of the vehicle-mounted charger are reduced.
Description
Technical Field
The invention belongs to the technical field of pure electric vehicle control, and relates to a platformization control method for a vehicle-mounted charger of an electric vehicle.
Background
With the rapid development of new energy industries, the market holding amount of electric automobiles is increasing. At present, domestic electric automobile is the blowout formula development, along with the promotion of user's demand, and whole car continuation of the journey constantly improves, and a section electric automobile type needs carry on the battery system of different continuation of the journey mileage according to different configuration demands. The configuration types of the electric automobile are increased, the same type of electric automobile carries battery systems with different endurance mileage according to different configuration requirements, and the difficulty is undoubtedly increased for matching of a vehicle-mounted charger carried by the same type of electric automobile.
The battery systems of the same type of electric vehicle carrying different endurance mileage are adopted in the field, and different vehicle-mounted chargers are carried by the same type of electric vehicle according to the carried battery systems of the different endurance mileage, namely, the same type of electric vehicle carries a plurality of vehicle-mounted chargers. The vehicle-mounted chargers are various and complex in type, but the hardware aspects of the chargers are basically consistent, and only the software strategy aspect has difference.
At present, a plurality of manufacturers of battery modules are available, the battery systems are also variable, the current and the voltage of the battery systems are different for different battery systems of the same vehicle type, and thus, the vehicle-mounted chargers carried by the whole vehicle are different, the different types of vehicle-mounted chargers increase the research and development cost and the production cost of the vehicle-mounted chargers on the one hand, and bring inconvenience to field assembly personnel and after-sale maintenance personnel of the whole vehicle on the other hand.
The current and the voltage of different battery systems have difference. The vehicle-mounted charger is used as an electric energy conversion device which is fixedly arranged on a vehicle and is used for controlling and adjusting the charging of the battery, and converts the external alternating current contacting with a power grid into the direct current used by the power battery of the electric vehicle. The difference of the current and the voltage of the battery system determines the difference of the vehicle-mounted chargers. The vehicle-mounted charger with different models increases the production cost of the charger, brings inconvenience to the assembly and later maintenance of the electric automobile, and easily causes potential safety hazards such as misassembly of the assembly or maintenance personnel.
The vehicle-mounted charger is used as an electric energy conversion device which is fixedly arranged on a vehicle and is used for controlling and adjusting the charging of the battery, and converts the external alternating current contacting with a power grid into the direct current used by the power battery of the electric vehicle. The difference of the current and the voltage of the battery system determines the difference of the vehicle-mounted chargers. The vehicle-mounted charger with different models increases the production cost of the charger, and brings inconvenience to the assembly and later maintenance of the electric automobile.
Disclosure of Invention
The invention provides a platformization control method for a vehicle-mounted charger of an electric vehicle, and aims to realize compatibility of batteries with different endurance mileage.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention relates to a platformization control method for a vehicle-mounted charger of an electric vehicle, which comprises the following steps of:
starting;
step 4, in the slow charging process, the OBC monitors and judges the output voltage value requested by the CAN signal BMS, the highest single voltage value of the battery and the SOC value in real time;
if the BMS requests that the output voltage is 408V, the highest cell voltage of the battery reaches 4200mV, and the SOC reaches 100%, entering step 5; if not, go to step 401;
and finishing slow charging.
In step 2, the BMS battery acquisition unit BMU acquires the voltage information of the battery monomer in real time and uploads the voltage information of the battery monomer to the BMS main control unit BCU through the inner CAN, and the BCU judges that the voltage of the maximum monomer battery monomer reaches the full-power cut-off voltage.
In step 3, the BMS prepares to stop slow Charging, and if the SOC does not reach 100%, the SOC is fully charged and corrected to 100%, and the CAN signal BMS requests the output state to change from Charging to disconnection and reduces the requested output current to 0A.
In step 403, if it is determined that a certain vehicle model reaches a slow full charge state, go to step 6; if not, whether the next vehicle model reaches a slow charging full state or not is continuously judged.
In step 6, the Charging state of the CAN signal OBC is changed from Charging to Charge Achieve (Charging is completed), the remote service controller TBOX detects that the Charging state of the OBC is Charge Achieve, and the related monitoring platform is uploaded to confirm that slow Charging is completed.
By adopting the technical scheme, the electric automobiles with the same type of electric automobile and different endurance mileage configurations are completely compatible. Therefore, the risk generated in the assembling and maintaining process can be effectively reduced, and unnecessary reworking is reduced. On the premise that the current and the voltage of the battery system have differences, the charger CAN still accurately send out a charging completion CAN message according to the requirements of related landmarks, and CAN be compatible with mass production projects in the early stage, so that the research and development cost and the production cost of the vehicle-mounted charger are reduced.
Drawings
Fig. 1 is a flow chart of a platformized control method for a vehicle-mounted charger of an electric vehicle.
Detailed Description
The following detailed description of the embodiments of the present invention will be given in order to provide those skilled in the art with a more complete, accurate and thorough understanding of the inventive concept and technical solutions of the present invention.
Abbreviations of the present invention:
SOC-Battery Charge;
BMS — battery management system;
OBC-vehicle charger;
CAN-controller area network;
TBOX — telematics;
BCU-Battery control Unit;
BMU-battery collection unit.
The invention relates to a software principle of a vehicle-mounted charger. In order to solve the problems in the prior art and reduce the research and development cost and the production cost of the vehicle-mounted charger, a common platform needs to be developed and designed, and the vehicle-mounted charger is compatible with the same type of electric vehicle and carries battery systems with different endurance mileage.
As shown in fig. 1, the invention is a block diagram of a method for controlling a vehicle-mounted charger of an electric vehicle in a platformization manner. In order to solve the problems in the prior art, overcome the defects and realize the purpose of being compatible with batteries with different endurance mileage, the invention adopts the technical scheme that: the invention relates to a platformization control method for a vehicle-mounted charger of an electric vehicle, which comprises the following steps of:
starting;
step 4, in the slow charging process, the OBC monitors and judges the output voltage value requested by the CAN signal BMS, the highest single voltage value of the battery and the SOC value in real time;
if the BMS requests that the output voltage is 408V, the highest cell voltage of the battery reaches 4200mV, and the SOC reaches 100%, entering step 5; if not, go to step 401;
and finishing slow charging.
The invention mainly relates to a battery system which is compatible with current and voltage differences by changing software strategies of a vehicle-mounted charger. On the premise that the current and the voltage of the battery system have differences, the charger CAN still accurately send out a charging completion CAN message according to the requirements of related landmarks, and CAN be compatible with products which are produced in quantity at the early stage.
The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.
Claims (1)
1. A platformization control method for a vehicle-mounted charger of an electric vehicle is characterized by comprising the following steps: the control method comprises the following steps:
starting;
step 1, normally and slowly charging; after the whole vehicle is inserted into the slow charging gun, the battery management system BMS and the vehicle-mounted charger OBC carry out CAN information interaction and carry out normal slow charging;
step 2, judging whether the single voltage reaches a full-electricity condition; if yes, entering step 3; if not, returning to the step 1; the BMS battery acquisition unit BMU acquires the voltage information of the battery monomer in real time and uploads the voltage information to the BMS main control unit BCU through the internal CAN, and the BCU judges that the voltage of the maximum monomer battery monomer reaches the full-electricity cut-off voltage;
step 3, preparing to stop slow charging; the BMS is ready to stop slow Charging, if the SOC does not reach 100 percent at the moment, the SOC is subjected to full-charge correction to reach 100 percent, meanwhile, the CAN signal BMS requests that the output state is changed from Charging to Disconnect, and simultaneously the requested output current is reduced to 0A;
step 4, in the slow charging process, the OBC monitors and judges the output voltage value requested by the CAN signal BMS, the highest single voltage value of the battery and the SOC value in real time;
if the BMS requests that the output voltage is 408V, the highest cell voltage of the battery reaches 4200mV, and the SOC reaches 100%, entering step 5; if not, go to step 401;
step 401, if the BMS requests that the output voltage is 415V, the highest cell voltage of the battery reaches 4250mV, and the SOC reaches 100%, then the step 501 is entered; if not, go to step 402;
step 402, if the BMS requests that the output voltage is 420V, the highest cell voltage of the battery reaches 4250mV, and the SOC reaches 100%, then the step 502 is entered; if not, go to step 403;
step 403, reserving more redundant vehicle types; if the vehicle type is judged to reach the slow charging and full charging state, the step 6 is carried out; if not, continuously judging whether the next vehicle type reaches a slow charging full state;
step 5, if the OBC monitors that the output voltage requested by the CAN signal BMS is 408V, the highest cell voltage of the battery reaches 4200mV and the SOC reaches 100%, judging that the vehicle model M1AEV-350KM reaches a slow full-charge state, and entering step 6;
step 501, if the OBC monitors that the output voltage requested by the CAN signal BMS is 415V, the highest cell voltage of the battery reaches 4250mV and the SOC reaches 100%, judging that the vehicle type M1AEV-JEVE-401KM reaches a slow full charge state, and entering step 6;
step 502, if the OBC monitors that the output voltage requested by the CAN signal BMS is 420V, the highest cell voltage of the battery reaches 4250mV and the SOC reaches 100%, judging that the vehicle model M1AEV-QDTL-401KM reaches a slow full charge state, and entering step 6;
step 6, reporting the charging state to be charging completion by the vehicle-mounted charger; the Charging state of the CAN signal OBC is changed from Charging to Charge Achieve, the remote service controller TBOX detects that the Charging state of the OBC is the Charge Achieve, and the related monitoring platform is uploaded to confirm that slow Charging is completed;
step 7, the BMS controls to disconnect the slow charging relay;
and finishing slow charging.
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