CN116331040A - Electric automobile charging control system, method and device and vehicle - Google Patents
Electric automobile charging control system, method and device and vehicle Download PDFInfo
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- CN116331040A CN116331040A CN202310229209.4A CN202310229209A CN116331040A CN 116331040 A CN116331040 A CN 116331040A CN 202310229209 A CN202310229209 A CN 202310229209A CN 116331040 A CN116331040 A CN 116331040A
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- 239000004065 semiconductor Substances 0.000 description 4
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- 238000005516 engineering process Methods 0.000 description 2
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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
- B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
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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
- B60L53/20—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 converters located in the vehicle
- B60L53/22—Constructional details or arrangements of charging converters specially adapted for charging 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
- 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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- Engineering & Computer Science (AREA)
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- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to an electric automobile charging control system, a method, a device and a vehicle, which relate to the technical field of electric automobile charging, and comprise a boosting module, a voltage control module and a voltage control module, wherein the boosting module is electrically connected with a battery module and is used for boosting the output voltage of a voltage output end when the output voltage of the voltage output end is lower than the voltage of the battery module; the distribution module is electrically connected with the voltage output end and the boosting module and is used for executing different charging modes; and the control module is used for controlling the distribution module, judging the magnitude relation between the output voltage of the voltage output end and the voltage of the battery module, and determining a charging mode based on the magnitude relation. The invention can improve the charging power of the low-voltage charging pile to the high-voltage battery without an external inductor.
Description
Technical Field
The invention relates to the technical field of electric automobile charging, in particular to an electric automobile charging control system, an electric automobile charging control method, an electric automobile charging control device and a vehicle.
Background
With the development and popularization of electric automobiles, users have higher and higher requirements on the endurance mileage of the vehicle battery. More battery core modules are increasingly adopted by electric automobiles, and battery pack schemes with larger electric energy capacity and higher voltage level are formed by parallel connection.
At present, various charging facilities exist in the market, and if the battery voltage of the electric automobile is higher than the output voltage of the charging facilities, the problem that charging cannot be performed or charging is not full occurs. In order to solve the problem, the current motor boosting technical scheme is based on a single motor, and the motor boosting of different charging devices is realized through the on-off of a contactor in cooperation with corresponding circuit design.
Because the inductance value of the single motor winding is limited, the charging power of more than 60kW can not be realized, and the charging power is improved by matching with an external inductor. The configuration of the external inductor increases the cost and weight of the system, and meanwhile, the heating problem brought in the boosting and charging process of the external inductor is solved by additionally configuring a cooling loop, so that the design of the whole system is complicated.
Disclosure of Invention
In order to solve the technical problems, the invention provides an electric automobile charging control system, an electric automobile charging control method, an electric automobile charging control device and a vehicle.
In a first aspect, the present invention provides an electric vehicle charging control system, which adopts the following technical scheme:
an electric automobile charge control system, the voltage output end of battery module and charging stake of electricity in electric automobile is connected, includes:
the voltage boosting module is electrically connected with the battery module and is used for boosting the output voltage of the voltage output end when the output voltage of the voltage output end is lower than the voltage of the battery module;
the distribution module is electrically connected with the voltage output end and the boosting module and is used for executing different charging modes;
the control module is used for controlling the distribution module, judging the magnitude relation between the output voltage of the voltage output end and the voltage of the battery module, and determining a charging mode based on the magnitude relation;
the charging mode comprises a direct charging mode in which the charging pile is used for charging directly and a rising charging mode in which the charging pile is used for rising the voltage;
the positive electrode of the voltage output end is electrically connected with the positive electrode of the battery module and the distribution module respectively, and the negative electrode of the voltage output end is electrically connected with the negative electrode of the battery module.
Further, in the above electric vehicle charging control system, the boost module includes at least one three-phase motor and a motor controller connected to the three-phase motor.
Further, in the above-mentioned electric vehicle charging control system, the motor controller includes a first switching element Q1, a second switching element Q2, a third switching element Q3, a fourth switching element Q4, a fifth switching element Q5, a sixth switching element Q6, and a filter capacitor C1;
the first switching element Q1 is connected in series with the fourth switching element Q4 and connected in parallel to two ends of the battery module;
the second switching element Q2 is connected in series with the fifth switching element Q5 and connected in parallel to two ends of the battery module;
the third switching element Q3 is connected in series with the sixth switching element Q6 and connected in parallel to two ends of the battery module;
the filter capacitor C1 is connected to two ends of the battery module in parallel;
the three phases of the three-phase motor are respectively connected between the first switching element Q1 and the fourth switching element Q4, between the second switching element Q2 and the fifth switching element Q5, and between the third switching element Q3 and the sixth switching element Q6.
Further, in the above electric vehicle charging control system, when the three-phase motor is one, the distribution module includes a high-voltage contactor K1, a high-voltage contactor K2, a high-voltage contactor K3, a high-voltage contactor K4, and a charging filter capacitor C2;
any one of the three-phase motors is led out to form a high-voltage outgoing line;
the high-voltage outgoing line is connected with the charging filter capacitor C2 through the high-voltage contactor K2;
the high-voltage outlet is connected with the positive electrode of the voltage output end through the high-voltage contactor K4;
the charging filter capacitor C2 is connected in parallel with the boosting module;
the high-voltage contactor K1 is connected in series between the voltage output end and the positive electrode of the battery module;
the high-voltage contactor K3 is connected in series between the voltage output end and the negative electrode of the battery module.
Further, in the above electric vehicle charging control system, when the three-phase motor is plural, the distribution module includes a high-voltage contactor K5, a high-voltage contactor K6, a high-voltage contactor K7, a segment contactor K8, and a charging filter capacitor C3;
a high-voltage outgoing line is led out from any one of the three-phase motors respectively;
each high-voltage outgoing line is connected with a high-voltage bus through a segmented contactor K8;
the high-voltage bus is connected with the positive electrode of the voltage output end through the high-voltage contactor K6;
the charging filter capacitor C3 is connected in parallel with the boosting module;
the high-voltage contactor K5 is connected in series between the voltage output end and the positive electrode of the battery module;
the high-voltage contactor K7 is connected in series between the voltage output end and the negative electrode of the battery module.
Further, in the above electric vehicle charging control system, when the three-phase motor is plural, the distribution module includes a high-voltage contactor K9, a high-voltage contactor K10, a high-voltage contactor K11, a segment contactor K12, and a charging filter capacitor C4;
a high-voltage outgoing line is led out from the three-phase center point of each three-phase motor respectively;
each high-voltage outgoing line is connected with a high-voltage bus through a segmented contactor K12;
the high-voltage bus is connected with the positive electrode of the voltage output end through the high-voltage contactor K10;
the charging filter capacitor C4 is connected in parallel with the boosting module;
the high-voltage contactor K9 is connected in series between the voltage output end and the positive electrode of the battery module;
the high-voltage contactor K11 is connected in series between the voltage output end and the negative electrode of the battery module.
Further, in the above electric vehicle charging control system, when the three-phase motor is plural, the distribution module includes a high-voltage contactor K13, a high-voltage contactor K14, a high-voltage contactor K15, and a segment contactor K16;
the three-phase center points of the three-phase motors are connected at high voltage;
each two three-phase motors are connected in series through a segmented contactor K16;
the three-phase motors connected in series are connected with the positive electrode of the voltage output end through the high-voltage contactor K14;
the high-voltage contactor K13 is connected in series between the voltage output end and the positive electrode of the battery module;
the high-voltage contactor K15 is connected in series between the voltage output end and the negative electrode of the battery module.
In a second aspect, the invention provides a method for controlling charging of an electric automobile, which adopts the following technical scheme:
the electric automobile charging control method is applied to the control system of any one of the above technologies, and comprises the following steps:
obtaining the output voltage of a voltage output end and the voltage of a battery module;
judging the magnitude relation between the output voltage of the voltage output end and the voltage of the battery module based on the control module, and determining a charging mode based on the magnitude relation;
and based on the distribution module, executing different charging modes, and directly charging the battery module by a charging pile or charging after boosting by the boosting module.
Further, in the above method for controlling electric vehicle charging, when the three-phase motor is one, the performing different charging modes based on the distribution module, and charging the battery module directly by the charging pile or after boosting by the boosting module includes:
when the charging mode is the direct charging mode, the control module controls the high-voltage contactor K1 and the high-voltage contactor K3 to be closed, and the high-voltage contactor K2 and the high-voltage contactor K4 to be opened;
when the charging mode is the charging-up mode, the control module controls the high-voltage contactor K2 and the high-voltage contactor K4 to be closed, and the high-voltage contactor K1 and the high-voltage contactor K3 to be opened.
Further, in the above method for controlling electric vehicle charging, when the three-phase motor is plural, the performing different charging modes based on the distribution module, and charging the battery module directly by the charging pile or after boosting by the boosting module includes:
when the charging mode is the direct charging mode, the control module controls the high-voltage contactor K5 and the high-voltage contactor K7 to be closed, and the high-voltage contactor K6 and each sectional contactor K8 to be opened;
when the charging mode is the charging up mode, the control module controls the high-voltage contactor K6, the high-voltage contactor K7 and at least one sectional contactor K8 to be closed, and controls the high-voltage contactor K5 to be opened.
Further, in the above method for controlling electric vehicle charging, when the three-phase motor is plural, the performing different charging modes based on the distribution module, and charging the battery module directly by the charging pile or after boosting by the boosting module includes:
when the charging mode is the direct charging mode, the control module controls the high-voltage contactor K9 and the high-voltage contactor K11 to be closed, and the high-voltage contactor K10 and each sectional contactor K12 to be opened;
when the charging mode is the charging up mode, the control module controls the high-voltage contactor K10, the high-voltage contactor K11 and at least one sectional contactor K12 to be closed, and controls the high-voltage contactor K9 to be opened.
Further, in the above method for controlling electric vehicle charging, when the three-phase motor is plural, the performing different charging modes based on the distribution module, and charging the battery module directly by the charging pile or after boosting by the boosting module includes:
when the charging mode is the direct charging mode, the control module controls the high-voltage contactor K13, the high-voltage contactor K14 and the high-voltage contactor K15 to be closed, and each sectional contactor K16 is opened;
when the charging mode is the charging up mode, the control module controls the high-voltage contactor K14, the high-voltage contactor K15 and each segmented contactor K16 to be closed, and the high-voltage contactor K13 to be opened.
In a third aspect, the present invention provides a charging device, which adopts the following technical scheme:
a charging device comprising a control system according to any one of the above techniques.
In a fourth aspect, the present invention provides a vehicle, which adopts the following technical scheme:
a vehicle comprising a charging device as described in the above-mentioned technology.
In summary, the invention has the following beneficial technical effects:
the charging control system only needs to control the charging mode through the control module, and responds to the charging mode through the distribution module and the boosting module, and an external inductor in the charging system is not needed, so that the heating problem caused by the external inductor in the boosting charging process is avoided.
Drawings
Fig. 1 is a topology diagram of one embodiment of an electric vehicle charge control system of the present invention.
Fig. 2 is a circuit diagram of an embodiment of an electric vehicle charge control system of the present invention.
Fig. 3 is a circuit diagram of another embodiment of an electric vehicle charging control system according to the present invention.
Fig. 4 is a circuit diagram of another embodiment of an electric vehicle charging control system according to the present invention.
Fig. 5 is a circuit diagram of another embodiment of an electric vehicle charging control system according to the present invention.
Fig. 6 is a flowchart of an embodiment of a method for controlling charging of an electric vehicle according to the present invention.
Reference numerals illustrate: 1. a boost module; 11. a motor controller; 12. a three-phase motor; 2. a distribution module; 3. a control module; 4. a battery module; 5. and a voltage output terminal.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. 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.
The execution sequence of the method steps in the embodiments of the present invention may be performed according to the sequence described in the specific embodiments, or the execution sequence of each step may be adjusted according to actual needs on the premise of solving the technical problem, which is not listed here.
The invention is described in further detail below with reference to fig. 1-6.
The electric vehicle is usually charged in an alternating current charging or direct current charging mode, the charging speed of direct current charging is high, and a large number of direct current charging base stations are built. For the electric automobile with the 400V power supply system which is popular at present, a perfect infrastructure is built. And an electric automobile with an 800V direct current bus system has more advantages in power performance compared with a 400V direct current bus. Therefore, on the electric vehicle side, the 800V high-voltage bus system is more and more configured, but the infrastructure construction of the direct-current quick charging pile compatible with the 800V battery system is insufficient. Therefore, currently, there are mainly dc charging piles with 800V output voltage and 400V output voltage.
For convenience in describing the embodiments and implementation principles of the present invention, the output voltages of the voltage output terminals of the charging piles in the embodiments of the present invention are 800V and 400V, respectively. It should be noted that the present invention is also applicable to boost charging of other voltage values.
The embodiment of the invention discloses an electric automobile charging control system which is electrically connected with a battery module of an electric automobile and a voltage output end of a charging pile, wherein the voltage of the battery module is 800V.
Referring to fig. 1, an electric vehicle charging control system includes a boost module 1, a distribution module 2, and a control module 3.
The boost module 1 is electrically connected to a battery module 4 of the electric vehicle, and is configured to boost an output voltage of the voltage output terminal 5 when the output voltage of the voltage output terminal 5 of the charging pile is lower than the voltage of the battery module 4. Specifically, when the output voltage of the voltage output terminal 5 of the charging pile is 400V, the voltage boosting module 1 boosts the output voltage of the voltage output terminal 5, so as to adapt to the battery module 4 of 800V.
The distribution module 2 is electrically connected to the voltage output terminal 5 and the boost module 1 for executing different charging modes.
The control module 3 is controlled and connected to the distribution module 2, and is configured to determine a magnitude relation between the output voltage of the voltage output terminal 5 and the voltage of the battery module 4, and determine a charging mode based on the magnitude relation.
The charging mode includes a direct charging mode in which the charging pile is directly charged and a boost charging mode in which the voltage is boosted by the boost module 1. The positive electrode of the voltage output terminal 5 is electrically connected to the positive electrode of the battery module 4 and the distribution module 2, respectively, and the negative electrode of the voltage output terminal 5 is electrically connected to the negative electrode of the battery module 4.
Specifically, the voltage of the battery module 4 is determined, and in the embodiment of the present invention, is determined to be 800V. The voltage of the charging pile voltage output 5 is read by the control module 3. When the output voltage of the voltage output end 5 of the charging pile is 800V, the control module 3 determines that the charging mode is the direct charging mode, and the distribution module 2 responds to enable the voltage output end 5 to directly charge the charging module. When the output voltage of the voltage output end 5 of the charging pile is 400V, the control module 3 determines that the charging mode is a charging lifting mode, and the distribution module 2 responds to boost the output voltage of the voltage output end 5 to 800V through the boosting module 1 to charge the charging module.
The charging control system only needs to control the charging mode through the control module 3 and responds to the charging mode through the distribution module 2 and the boosting module 1, and an inductor is not required to be externally connected in the charging system, so that the heating problem caused by the external inductor in the boosting charging process is avoided.
Further, as a specific embodiment of the present invention, the boost module 1 includes at least one three-phase motor 12 and a motor controller 11 connected to the three-phase motor 12. The three-phase motor 12 can directly adopt a driving motor of the electric automobile system, and the motor controller 11 also correspondingly directly adopts a motor inverter for controlling the driving motor. At present, the driving system of the electric automobile is divided into four common types of single motor, double motor, three motor and four motor according to the number of driving motors. The charge control system of the present invention does not limit the number of three-phase motors 12, and thus can be adapted to charge control of all types of electric vehicles.
Further, referring to fig. 2 to 5, as a specific embodiment of the present invention, the motor controller 11 includes a first switching element Q1, a second switching element Q2, a third switching element Q3, a fourth switching element Q4, a fifth switching element Q5, a sixth switching element Q6, and a filter capacitor C1.
The first switching element Q1 is connected in series with the fourth switching element Q4 and connected in parallel to two ends of the battery module 4; the second switching element Q2 is connected in series with the fifth switching element Q5 and connected in parallel to two ends of the battery module 4; the third switching element Q3 is connected in series with the sixth switching element Q6 and connected in parallel to both ends of the battery module 4.
The filter capacitor C1 is connected in parallel to two ends of the battery module 4.
The three phases of the three-phase motor 12 are respectively connected between the first switching element Q1 and the fourth switching element Q4, between the second switching element Q2 and the fifth switching element Q5, and between the third switching element Q3 and the sixth switching element Q6.
During the running process of the electric automobile, the motor controller 11 is normally used as a motor inverter, and converts the direct current of the battery module 4 into alternating current to drive the three-phase motor 12 to rotate, so that the vehicle is driven to run. During the boost charging process, the motor controller 11 controls the duty ratio of the fourth switching element Q4, the fifth switching element Q5, and the sixth switching element Q6 in the motor controller 11 under the action of the control module 3, so that a circuit formed by three-phase coils of the three-phase motor 12 connected to the motor controller 11 functions as a boost converter. So that the 400V voltage of the voltage output terminal 5 is boosted to 800V voltage by the boost converter and the battery module 4 is charged.
Further, as a specific embodiment of the present invention, referring to fig. 2, when the driving system of the electric vehicle is a single motor driving, that is, when the three-phase motor 12 is one, the distribution module 2 includes a high-voltage contactor K1, a high-voltage contactor K2, a high-voltage contactor K3, a high-voltage contactor K4, and a charge filter capacitor C2. Specifically, various switching devices (semiconductor switches, relays, etc.) well known in the art may be used as the high-voltage contactor K1, the high-voltage contactor K2, the high-voltage contactor K3, and the high-voltage contactor K4.
Wherein any one phase of the three-phase motor 12 leads out a high voltage outlet. The high-voltage outgoing line is connected with the charging filter capacitor C2 through the high-voltage contactor K2, and the high-voltage contactor K4 is connected with the positive electrode of the voltage output end 5. The charge filter capacitor C2 is connected in parallel to the boost module 1, and is used for providing a function of stabilizing the input voltage in the boost charging process. The high-voltage contactor K1 is connected in series between the voltage output end 5 and the positive electrode of the battery module 4 and is used for controlling the on-off between the positive electrode of the voltage output end 5 and the positive electrode of the battery module 4; the high-voltage contactor K3 is connected in series between the voltage output end 5 and the negative electrode of the battery module 4 and is used for controlling the on-off between the negative electrode of the voltage output end 5 and the negative electrode of the battery module 4.
Specifically, after the charging control system is connected with the voltage output end 5 of the charging pile, the control module 3 determines the maximum supply voltage of the voltage output end 5 of the charging pile. When the maximum supply voltage is greater than the nominal battery maximum voltage, the control module 3 closes the high-voltage contactor K1 and the high-voltage contactor K3 to directly charge the battery module 4. When the maximum supply voltage is smaller than the maximum voltage of the nominal battery, the control module 3 closes the high-voltage contactor K2 and the high-voltage contactor K4, the charging current of the voltage output end 5 is boosted by a series-parallel circuit consisting of one phase and the other two phases led out through the high-voltage outlet, and the battery module 4 is charged after the boosting is completed.
Further, as another specific embodiment of the present invention, referring to fig. 3, when the driving system of the electric vehicle is multi-motor driving, that is, when the three-phase motor 12 is multiple, the distribution module 2 includes a high voltage contactor K5, a high voltage contactor K6, a high voltage contactor K7, a segment contactor K8, and a charge filter capacitor C3. Also, various switching devices (semiconductor switches, relays, etc.) well known in the art may be used as the high-voltage contactor K5, the high-voltage contactor K6, the high-voltage contactor K7, and the segment contactor K8 in the present embodiment. For convenience of description of the embodiment, the number of the three-phase motors 12 in this embodiment is two.
Wherein, a high voltage outgoing line is respectively led out from any one phase of the two three-phase motors 12, and the two high voltage outgoing lines are connected with a high voltage bus through a sectional contactor K8. The high-voltage bus is connected to the positive pole of the voltage output 5 via a high-voltage contactor K6. The charge filter capacitor C3 is connected in parallel to the boost module 1, and is configured to provide a stable input voltage during boost charging. The high-voltage contactor K5 is connected in series between the voltage output end 5 and the positive electrode of the battery module 4 and is used for controlling the on-off between the positive electrode of the voltage output end 5 and the positive electrode of the battery module 4; the high-voltage contactor K7 is connected in series between the voltage output end 5 and the negative electrode of the battery module 4 and is used for controlling the on-off between the negative electrode of the voltage output end 5 and the negative electrode of the battery module 4.
Specifically, after the charging control system is connected with the voltage output end 5 of the charging pile, the control module 3 determines the maximum supply voltage of the voltage output end 5 of the charging pile. When the maximum supply voltage is greater than the nominal battery maximum voltage, the control module 3 closes the high-voltage contactor K5 and the high-voltage contactor K7 to directly charge the battery module 4. When the maximum supply voltage is smaller than the maximum voltage of the nominal battery, the control module 3 closes the high-voltage contactor K6, the high-voltage contactor K7 and at least one segment contactor K8, and the charging current of the voltage output end 5 is boosted by a series-parallel circuit formed by one phase and the other two phases led out through the high-voltage outlet, and the battery module 4 is charged after the boosting is finished. The number of the closed segmented contactors K8 is determined by the control module 3 according to the charging demand power, only one of the segmented contactors K8 is closed, the three-phase motors 12 at the closed position are used for independently completing the boosting operation, and all the three-phase motors 12 are closed to jointly complete the boosting operation.
Further, when the driving system of the electric vehicle is multi-motor driving, that is, when the three-phase motor 12 is multiple, referring to fig. 4, the distribution module 2 includes a high-voltage contactor K9, a high-voltage contactor K10, a high-voltage contactor K11, a segment contactor K12, and a charging filter capacitor C4. Also, various switching devices (semiconductor switches, relays, etc.) well known in the art may be used as the high-voltage contactor K9, the high-voltage contactor K10, the high-voltage contactor K11, and the segment contactor K12 in the present embodiment. For convenience of description of the embodiment, the number of the three-phase motors 12 in this embodiment is also two.
The three-phase center points of the two three-phase motors 12 respectively lead out a high-voltage outgoing line, and the two high-voltage outgoing lines are connected with a high-voltage bus through a segmented contactor K12. The high-voltage bus is connected to the positive pole of the voltage output 5 via a high-voltage contactor K10. The charge filter capacitor C4 is connected in parallel to the boost module 1, and is configured to provide a stable input voltage during boost charging. The high-voltage contactor K9 is connected in series between the voltage output end 5 and the positive electrode of the battery module 4 and is used for controlling the on-off between the positive electrode of the voltage output end 5 and the positive electrode of the battery module 4; the high-voltage contactor K11 is connected in series between the voltage output terminal 5 and the negative electrode of the battery module 4, and is used for controlling the on-off between the negative electrode of the voltage output terminal 5 and the negative electrode of the battery module 4.
Specifically, after the charging control system is connected with the voltage output end 5 of the charging pile, the control module 3 determines the maximum supply voltage of the voltage output end 5 of the charging pile. When the maximum supply voltage is greater than the nominal battery maximum voltage, the control module 3 closes the high-voltage contactor K9 and the high-voltage contactor K11 to directly charge the battery module 4. When the maximum supply voltage is smaller than the maximum voltage of the nominal battery, the control module 3 closes the high-voltage contactor K10, the high-voltage contactor K11 and at least one segment contactor K12, and the charging current of the voltage output end 5 is boosted by a parallel circuit formed by three phases of the three-phase motor 12, and the battery module 4 is charged after the boosting is completed. The number of the closed segmented contactors K12 is determined by the control module 3 according to the charging demand power, only one of the segmented contactors K12 is closed, the three-phase motors 12 at the closed position are used for independently completing the boosting operation, and all the three-phase motors 12 are closed to jointly complete the boosting operation.
Further, when the driving system of the electric vehicle is multi-motor driving, that is, when the three-phase motor 12 is plural, as another specific embodiment of the present invention, referring to fig. 5, the distribution module 2 includes a high voltage contactor K13, a high voltage contactor K14, a high voltage contactor K15, and a segment contactor K16. Also, various switching devices (semiconductor switches, relays, etc.) well known in the art may be used as the high-voltage contactor K13, the high-voltage contactor K14, the high-voltage contactor K15, and the segment contactor K16 in this embodiment. For convenience of description of the embodiment, the number of the three-phase motors 12 in this embodiment is also two.
The three-phase center points of the two three-phase motors 12 are connected at high voltage, and the two three-phase motors 12 are connected in series through a sectional contactor K16, wherein the sectional contactor K16 is in an off state when not being charged. The two three-phase motors 12 connected in series are connected with the positive pole of the voltage output terminal 5 through a high-voltage contactor K14. The high-voltage contactor K13 is connected in series between the voltage output end 5 and the positive electrode of the battery module 4 and is used for controlling the on-off between the positive electrode of the voltage output end 5 and the positive electrode of the battery module 4; the high-voltage contactor K15 is connected in series between the voltage output terminal 5 and the negative electrode of the battery module 4, and is used for controlling the on-off between the negative electrode of the voltage output terminal 5 and the negative electrode of the battery module 4.
In the present embodiment, the charge filter capacitor is constituted by the filter capacitor C1 provided by the motor controller 11 itself, and functions to provide a stable input voltage during boost charging.
Specifically, after the charging control system is connected with the voltage output end 5 of the charging pile, the control module 3 determines the maximum supply voltage of the voltage output end 5 of the charging pile. When the maximum supply voltage is greater than the nominal battery maximum voltage, the control module 3 closes the high-voltage contactor K13, the high-voltage contactor K14, and the high-voltage contactor K15 for direct charging. When the maximum supply voltage is smaller than the maximum voltage of the nominal battery, the control module 3 closes the high-voltage contactor K14, the high-voltage contactor K15 and the segmented contactor K16, the charging current of the voltage output end 5 is only boosted by a series circuit formed by three-phase windings of the two three-phase motors 12, and the battery module 4 is charged after the boosting is completed.
It is noted that, in the present embodiment, in the whole vehicle driving state, the high voltage contactor K13 needs to be kept closed, and the high voltage contactor K14, the high voltage contactor K15, and the segment contactor K16 are opened, so as to ensure the normal driving function of the two three-phase motors 12.
Based on the electric vehicle charging control system described in each embodiment, the embodiment of the invention also discloses an electric vehicle charging control method.
Referring to fig. 6, an electric vehicle charge control method includes:
s1, obtaining the output voltage of a voltage output end 5 and the voltage of a battery module 4;
s2, judging the magnitude relation between the output voltage of the voltage output end 5 and the voltage of the battery module 4 based on the control module 3, and determining a charging mode based on the magnitude relation;
and S3, based on the distribution module 2 executing different charging modes, the battery module 4 is directly charged by a charging pile or is charged after being boosted by the boosting module 1.
Specifically, the output voltage of the voltage output terminal 5 is automatically obtained by the control module 3 when the charging control system is connected with the charging pile, and the voltage of the battery module 4 belongs to a fixed parameter. The control module 3 outputs a voltage based on the obtained voltage output terminal 5, which is compared with the voltage of the fixed battery module 4.
When the output voltage is greater than the voltage of the battery module 4, the control module 3 determines that the current charging mode is a direct charging mode, and the distribution module 2 directly connects the output voltage of the voltage output terminal 5 to both ends of the battery module 4; when the output voltage is smaller than the voltage of the battery module 4, the control module 3 determines that the current charging mode is a boost charging mode, the distribution module 2 distributes the output voltage of the voltage output terminal 5 to the boost module 1, and the boost module 1 boosts the voltage of the battery module 4 and then charges the battery module 4.
Further, as a specific embodiment of the present invention, referring to fig. 2, when the three-phase motor 12 in the distribution module 2 is one, the performing different charging modes based on the distribution module 2, and directly charging the battery module 4 by the charging pile or charging after boosting by the boosting module 1 includes:
when the charging mode is the direct charging mode, the control module 3 controls the high-voltage contactor K1 and the high-voltage contactor K3 to be closed, and the high-voltage contactor K2 and the high-voltage contactor K4 to be opened. The battery module 4 is directly charged by the voltage output terminal 5.
When the charging mode is the charging up mode, the control module 3 controls the high-voltage contactor K2 and the high-voltage contactor K4 to be closed, and the high-voltage contactor K1 and the high-voltage contactor K3 to be opened. The voltage of the voltage output terminal 5 is boosted by a series-parallel circuit formed by one phase and the other two phases in the three-phase motor 12, and then the battery module 4 is charged.
Further, as another embodiment of the present invention, referring to fig. 3, when the three-phase motor 12 is plural, the performing different charging modes based on the distribution module 2, the charging the battery module 4 directly by the charging pile or after the boosting module 1 boosting includes:
when the charging mode is the direct charging mode, the control module 3 controls the high-voltage contactor K5 and the high-voltage contactor K7 to be closed, and the high-voltage contactor K6 and each segmented contactor K8 to be opened. The battery module 4 is directly charged by the voltage output terminal 5.
When the charging mode is the charging up mode, the control module 3 controls the high voltage contactor K6, the high voltage contactor K7 and at least one segment contactor K8 to be closed, and controls the high voltage contactor K5 to be opened. The output voltage of the voltage output end 5 is boosted by a series-parallel circuit formed by one phase and the other two phases in the three-phase motor 12, and meanwhile, the working number of the sectional contactors K8 is logically judged according to the charging power control module 3.
Further, as another embodiment of the present invention, referring to fig. 4, when the three-phase motor 12 is plural, the performing different charging modes based on the distribution module 2, the charging the battery module 4 directly by the charging pile or after the boosting module 1 boosting includes:
when the charging mode is the direct charging mode, the control module 3 controls the high-voltage contactor K9 and the high-voltage contactor K11 to be closed, and the high-voltage contactor K10 and each segmented contactor K12 to be opened. The battery module 4 is directly charged by the voltage output terminal 5.
When the charging mode is the charging up mode, the control module 3 controls the high voltage contactor K10, the high voltage contactor K11 and at least one segment contactor K12 to be closed, and controls the high voltage contactor K9 to be opened.
Further, as another embodiment of the present invention, referring to fig. 5, when the three-phase motor 12 is plural, the performing different charging modes based on the distribution module 2, the charging the battery module 4 directly by the charging pile or after the boosting module 1 boosting includes:
when the charging mode is the direct charging mode, the control module 3 controls the high-voltage contactor K13, the high-voltage contactor K14 and the high-voltage contactor K15 to be closed, and each segmented contactor K16 is opened;
when the charging mode is the charging up mode, the control module 3 controls the high voltage contactor K14, the high voltage contactor K15 and each segment contactor K16 to be closed, and the high voltage contactor K13 to be opened.
The embodiment of the invention also discloses a charging device, which comprises the electric automobile charging control system in any embodiment.
The embodiment of the invention also discloses a vehicle provided with the charging device in the embodiment.
Any process or method descriptions in flow charts of the present invention or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order from that shown or discussed, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiment of the present invention.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, system that includes a processing module, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (14)
1. An electric automobile charge control system locates in the electric automobile, but electric connection in battery module (4) of electric automobile and the voltage output (5) of filling electric pile, its characterized in that includes:
the voltage boosting module (1) is electrically connected with the battery module (4) and is used for boosting the output voltage of the voltage output end (5) when the output voltage of the voltage output end (5) is lower than the voltage of the battery module (4);
the distribution module (2) is electrically connected with the voltage output end (5) and the boosting module (1) and is used for executing different charging modes;
the control module (3) is used for controlling the distribution module (2) to judge the magnitude relation between the output voltage of the voltage output end (5) and the voltage of the battery module (4) and determining a charging mode based on the magnitude relation;
the charging mode comprises a direct charging mode in which the charging pile is used for charging directly and a rising charging mode in which the charging pile is used for rising the voltage after the voltage is increased by the voltage increasing module (1);
the positive electrode of the voltage output end (5) is electrically connected with the positive electrode of the battery module (4) and the distribution module (2) respectively, and the negative electrode of the voltage output end (5) is electrically connected with the negative electrode of the battery module (4).
2. An electric vehicle charging control system according to claim 1, characterized in that the boost module (1) comprises at least one three-phase motor (12) and a motor controller (11) connected to the three-phase motor (12).
3. The electric vehicle charging control system according to claim 2, wherein the motor controller (11) includes a first switching element Q1, a second switching element Q2, a third switching element Q3, a fourth switching element Q4, a fifth switching element Q5, a sixth switching element Q6, and a filter capacitor C1;
the first switching element Q1 is connected with the fourth switching element Q4 in series and connected to two ends of the battery module (4) in parallel;
the second switching element Q2 is connected with the fifth switching element Q5 in series and connected to two ends of the battery module (4) in parallel;
the third switching element Q3 is connected with the sixth switching element Q6 in series and connected to two ends of the battery module (4) in parallel;
the filter capacitor C1 is connected in parallel to two ends of the battery module (4);
the three phases of the three-phase motor (12) are respectively connected between the first switching element Q1 and the fourth switching element Q4, between the second switching element Q2 and the fifth switching element Q5, and between the third switching element Q3 and the sixth switching element Q6.
4. A charging control system for an electric vehicle according to claim 3, wherein when the three-phase motor (12) is one, the distribution module (2) includes a high-voltage contactor K1, a high-voltage contactor K2, a high-voltage contactor K3, a high-voltage contactor K4, and a charging filter capacitor C2;
any one of the three-phase motors (12) is led out to form a high-voltage outgoing line;
the high-voltage outgoing line is connected with the charging filter capacitor C2 through the high-voltage contactor K2;
the high-voltage outlet is connected with the positive electrode of the voltage output end (5) through the high-voltage contactor K4;
the charging filter capacitor C2 is connected in parallel with the boosting module (1);
the high-voltage contactor K1 is connected in series between the voltage output end (5) and the positive electrode of the battery module (4);
the high-voltage contactor K3 is connected in series between the voltage output end (5) and the negative electrode of the battery module (4).
5. A charging control system for an electric vehicle according to claim 3, wherein when the three-phase motor (12) is plural, the distribution module (2) includes a high-voltage contactor K5, a high-voltage contactor K6, a high-voltage contactor K7, a segment contactor K8, and a charging filter capacitor C3;
a high-voltage outlet is respectively led out from any one of the three-phase motors (12);
each high-voltage outgoing line is connected with a high-voltage bus through a segmented contactor K8;
the high-voltage bus is connected with the positive electrode of the voltage output end (5) through the high-voltage contactor K6;
the charging filter capacitor C3 is connected in parallel with the boosting module (1);
the high-voltage contactor K5 is connected in series between the voltage output end (5) and the positive electrode of the battery module (4);
the high-voltage contactor K7 is connected in series between the voltage output end (5) and the negative electrode of the battery module (4).
6. A charging control system for an electric vehicle according to claim 3, wherein when the three-phase motor (12) is plural, the distribution module (2) includes a high-voltage contactor K9, a high-voltage contactor K10, a high-voltage contactor K11, a segment contactor K12, and a charging filter capacitor C4;
a high-voltage outgoing line is led out from the three-phase center point of each three-phase motor (12);
each high-voltage outgoing line is connected with a high-voltage bus through a segmented contactor K12;
the high-voltage bus is connected with the positive electrode of the voltage output end (5) through the high-voltage contactor K10;
the charging filter capacitor C4 is connected in parallel with the boosting module (1);
the high-voltage contactor K9 is connected in series between the voltage output end (5) and the positive electrode of the battery module (4);
the high-voltage contactor K11 is connected in series between the voltage output end (5) and the negative electrode of the battery module (4).
7. An electric vehicle charging control system according to claim 3, characterized in that when there are a plurality of three-phase motors (12), the distribution module (2) comprises a high-voltage contactor K13, a high-voltage contactor K14, a high-voltage contactor K15 and a segment contactor K16;
the three-phase center points of the three-phase motors (12) are connected at high voltage;
each two three-phase motors (12) are connected in series through a segmented contactor K16;
the three-phase motors (12) connected in series are connected with the positive electrode of the voltage output end (5) through the high-voltage contactor K14;
the high-voltage contactor K13 is connected in series between the voltage output end (5) and the positive electrode of the battery module (4);
the high-voltage contactor K15 is connected in series between the voltage output end (5) and the negative electrode of the battery module (4).
8. A charging control method for an electric vehicle, applied to the control system according to any one of claims 1 to 7, comprising:
acquiring the output voltage of a voltage output end (5) and the voltage of a battery module (4);
determining a charging mode based on the control module (3) judging the magnitude relation between the output voltage of the voltage output end (5) and the voltage of the battery module (4);
and executing the charging mode based on the distribution module (2), wherein the charging mode comprises a direct charging mode and a rising charging mode, the charging mode is to directly charge the battery module (4) by adopting a charging pile, and the rising charging mode is to charge the battery module (4) after the charging pile is boosted by the boosting module (1).
9. The electric vehicle charging control method according to claim 8, characterized in that, when the three-phase motor (12) is one, the executing the charging mode based on the distribution module (2) includes:
when the charging mode is the direct charging mode, the control module (3) controls the high-voltage contactor K1 and the high-voltage contactor K3 to be closed, and the high-voltage contactor K2 and the high-voltage contactor K4 to be opened;
when the charging mode is the charging up mode, the control module (3) controls the high-voltage contactor K2 and the high-voltage contactor K4 to be closed, and the high-voltage contactor K1 and the high-voltage contactor K3 to be opened.
10. The electric vehicle charging control method according to claim 8, characterized in that, when the three-phase motor (12) is plural, the executing the charging mode based on the distribution module (2) includes:
when the charging mode is the direct charging mode, the control module (3) controls the high-voltage contactor K5 and the high-voltage contactor K7 to be closed, and the high-voltage contactor K6 and each sectional contactor K8 to be opened;
when the charging mode is the charging up mode, the control module (3) controls the high-voltage contactor K6, the high-voltage contactor K7 and at least one sectional contactor K8 to be closed, and controls the high-voltage contactor K5 to be opened.
11. The electric vehicle charging control method according to claim 8, characterized in that, when the three-phase motor (12) is plural, the executing the charging mode based on the distribution module (2) includes:
when the charging mode is the direct charging mode, the control module (3) controls the high-voltage contactor K9 and the high-voltage contactor K11 to be closed, and the high-voltage contactor K10 and each sectional contactor K12 to be opened;
when the charging mode is the charging up mode, the control module (3) controls the high-voltage contactor K10, the high-voltage contactor K11 and at least one sectional contactor K12 to be closed, and controls the high-voltage contactor K9 to be opened.
12. The electric vehicle charging control method according to claim 8, characterized in that, when the three-phase motor (12) is plural, the executing the charging mode based on the distribution module (2) includes:
when the charging mode is the direct charging mode, the control module (3) controls the high-voltage contactor K13, the high-voltage contactor K14 and the high-voltage contactor K15 to be closed, and each sectional contactor K16 is opened;
when the charging mode is the charging up mode, the control module (3) controls the high-voltage contactor K14, the high-voltage contactor K15 and each segmented contactor K16 to be closed, and the high-voltage contactor K13 is opened.
13. A charging device, characterized in that it comprises a control system according to any one of claims 1-7.
14. A vehicle comprising the charging device according to claim 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310229209.4A CN116331040A (en) | 2023-03-10 | 2023-03-10 | Electric automobile charging control system, method and device and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310229209.4A CN116331040A (en) | 2023-03-10 | 2023-03-10 | Electric automobile charging control system, method and device and vehicle |
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| CN116331040A true CN116331040A (en) | 2023-06-27 |
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| CN202310229209.4A Pending CN116331040A (en) | 2023-03-10 | 2023-03-10 | Electric automobile charging control system, method and device and vehicle |
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| CN (1) | CN116331040A (en) |
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