CN111130178A - Multi-vehicle cooperation vehicle-mounted charging device and method - Google Patents
Multi-vehicle cooperation vehicle-mounted charging device and method Download PDFInfo
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- CN111130178A CN111130178A CN202010005890.0A CN202010005890A CN111130178A CN 111130178 A CN111130178 A CN 111130178A CN 202010005890 A CN202010005890 A CN 202010005890A CN 111130178 A CN111130178 A CN 111130178A
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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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
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
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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
- Y02T90/14—Plug-in electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a multi-vehicle cooperation vehicle-mounted charging device, which comprises a main vehicle-mounted charger, a main vehicle power battery pack, a secondary vehicle power battery pack, a main vehicle battery management system, a secondary vehicle battery management system, a main vehicle whole vehicle controller, a secondary vehicle whole vehicle controller, an IGBT array and an additional charging gun, wherein the main vehicle power battery pack is connected with the secondary vehicle power battery pack; under the action of a main vehicle controller, a charging gun is additionally arranged to be connected with power battery packs of more vehicles, and the power battery packs share the same charging pile for charging; the whole vehicle controller controls the IGBT array to select the power battery pack connected to the vehicle-mounted charger to charge, so that the power battery packs are all in the cyclic charging process of pulse charging-standing, and the problem that a plurality of electric vehicles cannot be charged by using the same charging pile is solved; the continuous output of the vehicle-mounted charger is kept, the charging power utilization capability of the vehicle-mounted charger is improved, the contradiction that the charging power utilization capability of the vehicle-mounted charger is low in the later charging period of a single vehicle is solved, and the dependence on charging infrastructure is reduced. The invention further provides a multi-vehicle cooperation vehicle-mounted charging method.
Description
Technical Field
The invention relates to an efficient charging method suitable for a vehicle-mounted charger, in particular to a multi-vehicle cooperation vehicle-mounted charging device and method, which are used for improving the power utilization rate of the vehicle-mounted charger, improving the charging power utilization capacity of the vehicle-mounted charger and shortening the charging time of a plurality of electric vehicles.
Background
The pure electric vehicle adopts the motor as a driving device, and the vehicle-mounted rechargeable storage battery or other energy storage devices provide energy, so that the pure electric vehicle has the advantages of zero emission, high efficiency, silence, stable operation, easiness in driving and operation, low use and maintenance cost, wide required electric energy source and the like, and is regarded as a long-term development target or a final development target in the existing new energy vehicle technology.
The energy storage device commonly used on the electric automobile is a storage battery pack (hereinafter referred to as a battery pack), such as a lithium ion battery module, and the like, but due to the limitation of battery characteristics and charging facilities, the charging time is too long compared with the conventional fuel automobile refueling, so that the industrial popularization and application of the electric automobile are limited, and how to reasonably shorten the charging time of the electric automobile becomes an industrial problem.
The vehicle-mounted charger charges the power battery pack of the electric automobile by using alternating current in the power grid. In the final stage of charging the power battery pack, in order to shorten the charging time of the battery pack and improve the charging efficiency of the battery pack, a pulse charging mode is often adopted. The power battery stops charging after short-time low-current charging, at the moment, ohmic polarization and electrochemical polarization of the power battery pack can disappear quickly, concentration polarization can be weakened, the receiving capacity of the power battery pack to charging current can be improved, and the charging speed of the battery is accelerated. However, the pulse charging duration is long, and the charging power of the vehicle-mounted charger is in a low-utilization-rate state for a long time, so that the utilization capacity of the vehicle-mounted charger on the charging power is severely limited.
Because electric automobile charging infrastructure is imperfect, there is not enough phenomenon of filling electric pile in some areas, cause many electric motor cars to wait for same electric pile that fills to charge, cause electric automobile user experience to descend, the serious extravagant scheduling problem of user time.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a multi-vehicle cooperation vehicle-mounted charging device and a method, wherein power battery packs of a plurality of electric vehicles are connected in parallel by using an additional charging gun, a mode of sharing a vehicle-mounted charger by a plurality of vehicles is realized in a pulse charging mode of the vehicle-mounted charger, and the charging power utilization capacity of the vehicle-mounted charger is improved; and meanwhile, a plurality of electric automobiles are allowed to use the same charging pile for charging, so that the adaptability of the electric automobiles is improved.
The technical scheme of the invention is as follows:
a multi-vehicle cooperation vehicle-mounted charging device is characterized by comprising a main vehicle-mounted charger, a main vehicle power battery pack, a secondary vehicle power battery pack, a main vehicle battery management system, a secondary vehicle battery management system, a main vehicle whole vehicle controller, a secondary vehicle whole vehicle controller, an IGBT array and an additional charging gun;
the main vehicle-mounted charger is connected with an external power supply, is connected with the main vehicle power battery pack through an IGBT array, and charges the main vehicle power battery pack through current pulse of the IGBT array; the main vehicle battery management system is respectively connected with the main vehicle on-board charger, the main vehicle power battery pack and the main vehicle whole vehicle controller, is used for monitoring voltage, current, temperature and electric quantity information in the main vehicle power battery pack in real time, communicates with the connected main vehicle on-board charger through a CAN (controller area network) command, and sends the monitored information to the main vehicle whole vehicle controller; the main vehicle controller controls the on-off of the IGBT array by using a PWM (pulse-width modulation) wave according to a CAN (controller area network) command provided by a main vehicle battery management system; the IGBT array controls the connection between the main vehicle power battery pack and the main vehicle charger according to the PWM wave provided by the main vehicle controller; the additional charging gun is used for being connected with a slave vehicle power battery pack, the slave vehicle power battery pack is connected with a slave vehicle whole vehicle controller through a slave vehicle battery management system, the slave vehicle whole vehicle controller is connected with a master vehicle whole vehicle controller, and the master vehicle whole vehicle controller controls an IGBT array to be selectively connected into the slave vehicle power battery pack.
The invention provides a multi-vehicle cooperation vehicle-mounted charging method which comprises two working modes. The charging mode is a single-vehicle charging mode and a multi-vehicle charging mode.
The bicycle charging mode is as follows: the vehicle-mounted charging device is only used for charging a power battery pack of one electric vehicle; in the running mode, the additional charging gun does not work, and the main vehicle-mounted charger only charges the power battery pack of one electric vehicle; the main vehicle controller controls the main vehicle charger to interactively obtain an allowable charging current value with a power grid through a CAN (controller area network) line, and interactively obtains the maximum allowable charging current and the maximum allowable charging voltage of the power battery pack through the CAN line with a main vehicle battery management system to control the power battery pack of the electric vehicle to be charged through the vehicle charger; in a single-vehicle charging mode, the main vehicle controller controls all other high-voltage components except the power battery pack to be disconnected, so that the charging safety of the power battery pack is improved.
The multi-vehicle charging mode is characterized in that: the vehicle-mounted charging device charges a power battery pack of a plurality of electric vehicles by additionally arranging a charging gun; in the running mode, a charging gun is additionally arranged to enable the power battery packs of a plurality of automobiles to be connected in parallel, and the whole main automobile controller controls an IGBT array to enable different power battery packs to be sequentially connected to a main automobile charger to be charged in a pulse charging mode; in the running mode, the whole main vehicle controller controls the on-off state of the IGBT array, so that only one power battery pack is connected to the main vehicle charger to be charged each time, and the charging time does not exceed the standing period of pulse charging of other battery packs; the main vehicle controller controls the parallel multi-vehicle power battery packs to be in a pulse charging-standing cyclic charging process; the vehicle controller controls the vehicle-mounted charger to interactively obtain an allowable charging current value with a power grid through a CAN (controller area network) line, and interactively obtains the maximum allowable charging current and the maximum allowable charging voltage of the power battery pack through the CAN line with the battery management system to control the power battery pack of the electric vehicle to carry out pulse charging through the vehicle-mounted charger; under the multi-vehicle charging mode, the vehicle controllers of the master vehicle and the slave vehicles control all other high-voltage components except the power battery pack to be disconnected, so that the charging safety of the power battery pack is improved.
The charging time sequence under the multi-vehicle charging mode is as follows: the main vehicle-mounted charger continuously outputs pulse voltage, the main vehicle controller controls the IGBT array to enable the main vehicle power battery pack to be connected into the main vehicle-mounted charger, and at the moment, the main vehicle power battery pack is in a pulse charging state and the auxiliary vehicle power battery pack stands still; after one charging pulse of the vehicle-mounted charger is finished, the main vehicle whole controller controls the IGBT array to disconnect the main vehicle power battery pack, so that the auxiliary vehicle power battery pack is connected to the main vehicle-mounted charger, and the main vehicle power battery pack stands still at the moment, and the auxiliary vehicle power battery pack is in a pulse charging state; after the main vehicle stands still, the main vehicle controller controls the IGBT array, so that the main vehicle power battery pack is connected to the vehicle-mounted charger, and the main vehicle enters a pulse charging state; so that the A, B cars are respectively in the charging cycle of pulse charging-standing, and the pulse charging phase and the standing phase of the two cars are staggered.
The invention has the advantages that:
1. according to the multi-vehicle cooperation vehicle-mounted charging device and method, the additionally-arranged charging gun is connected with other electric vehicle power battery packs, and the same charging pile is used for intermittent charging, so that the adaptability of an electric vehicle is improved, and the dependence on basic charging equipment is reduced.
2. According to the multi-vehicle cooperation vehicle-mounted charging device and method, each power battery pack is charged by adopting a pulse charging-standing method, the vehicle-mounted charger always keeps outputting when multiple vehicles are charged together, and the utilization capacity of the charging power of the vehicle-mounted charger is improved;
3. according to the multi-vehicle cooperation vehicle-mounted charging device and method, each power battery pack is charged by adopting a pulse charging-standing method, so that the polarization characteristic of the power battery pack is favorably reduced, and the charging time is shortened;
4. according to the multi-vehicle cooperation vehicle-mounted charging device and method, the IGBT array is controlled through the vehicle control unit, only one power battery pack is connected with the vehicle-mounted charger at each time, and the charging safety of the power battery pack is improved;
5. according to the multi-vehicle cooperation vehicle-mounted charging device and method, the high-voltage connection between the non-battery pack element and the battery pack is completely disconnected in the charging process, the non-battery pack element is kept not to pass, and the charging safety of the vehicle is improved.
Drawings
FIG. 1: the invention discloses a structural schematic diagram of a multi-vehicle cooperation vehicle-mounted charging device;
FIG. 2 is a charging sequence diagram of the multi-vehicle cooperation vehicle-mounted charging method of the invention.
FIG. 3 is a schematic circuit diagram of an embodiment of the multi-vehicle cooperation vehicle-mounted charging device.
In the figure: 1-a grid power supply; 2, 3, 4, 5-IGBT; 6-a capacitor; 7. inductor
8, 9-transformers; a 10, 11-inductor; 12, 13-capacitors;
14,15,16,17,18,19,20, 21-IGBT; 22, 23-capacitors;
24,25,26,27,28,29,30, 31-IGBT; 32-A vehicle power battery pack;
33-A vehicle DC/DC converter; 34-A vehicle motor controller 35-A vehicle driving motor
36,37,38,39,40,41,42, 43-IGBT; 44-B vehicle power battery pack;
45-B vehicle DC/DC converter; 46-B vehicle motor controller 47-B vehicle driving motor
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The invention provides a structural schematic diagram of an embodiment of a multi-vehicle cooperation vehicle-mounted charging device, which is shown in fig. 1. A multi-vehicle cooperation vehicle-mounted charging device comprises a main vehicle-mounted charger, a main vehicle power battery pack, a secondary vehicle power battery pack, a main vehicle battery management system, a secondary vehicle battery management system, a main vehicle whole vehicle controller, a secondary vehicle whole vehicle controller, an IGBT array and an additional charging gun; in this embodiment, a car a is the master car, and B car is the slave car, includes: the vehicle-mounted charging system comprises a vehicle-mounted charger A, an IGBT array, a vehicle-mounted battery management system A, a vehicle-mounted power battery pack A and a vehicle-mounted vehicle controller A, wherein a charging gun, a vehicle-mounted power battery pack B, a vehicle-mounted battery management system B and the vehicle-mounted vehicle controller B are additionally arranged.
The vehicle-mounted charger A is connected with a power grid power supply to charge the power battery pack; the IGBT array is controlled to be switched on and off by the vehicle controller of the vehicle A, and the vehicle A or the vehicle B is determined to be connected with a vehicle-mounted charger for charging; and the additional charging gun is used for connecting the vehicle A with the vehicle B, and the electric energy in the power grid is changed into pulse current after passing through the vehicle-mounted charger of the vehicle A and then is charged for the power battery pack of the vehicle B through the additional charging gun. The power battery pack of the vehicle A (or the vehicle B) is used for storing electric energy and driving the electric vehicle to run; the battery management system of the vehicle A (or the vehicle B) is used for monitoring voltage, current, temperature and electric quantity information in the energy storage device in real time, and is responsible for communicating with a connected vehicle-mounted charger through a CAN command and sending the monitored information to the vehicle control unit; the vehicle controller of the vehicle A controls the on-off of the IGBT array by using a PWM (pulse-width modulation) wave according to a CAN command provided by a vehicle battery management system and a CAN command provided by the vehicle controller of the vehicle B, and controls the power battery pack of the vehicle A or the power battery pack of the vehicle B to be connected with a vehicle-mounted charger for charging; the IGBT array controls the connection of a power battery pack and a vehicle-mounted charger which are connected according to PWM waves provided by a vehicle controller of the vehicle A; the additional charging gun is used for physical connection of the vehicle A and the vehicle B, and electric energy is transmitted through the charging gun. The IGBT array switching controlled by the whole vehicle controller is relied on, so that the power battery packs of multiple vehicles are all in the cyclic charging process of pulse charging-standing, and the problem that multiple electric vehicles cannot be charged by using the same charging pile is solved; the continuous output of the vehicle-mounted charger is kept, the charging power utilization capacity of the vehicle-mounted charger is improved, and the contradiction that the charging power utilization capacity of the vehicle-mounted charger is low in the later charging period of a single vehicle is solved.
The vehicle-mounted charger is respectively connected with the battery management system of the vehicle A and the vehicle control unit of the vehicle A through signal wires; the battery management system of the vehicle A (or the vehicle B) is connected with the vehicle controller of the vehicle A (or the vehicle B) through a signal line, and the vehicle-mounted charger is connected with the IGBT array, the IGBT array is connected with the power battery pack and the additionally arranged charging gun through cables.
The multi-vehicle cooperation vehicle-mounted charging method provided by the invention can realize two operation modes, namely a single-vehicle charging mode and a multi-vehicle charging mode.
The bicycle charging mode is as follows: when the charging gun is additionally arranged and disconnected, only the running mode adopted by connecting the power battery pack of the vehicle A with the vehicle-mounted charger is adopted. In this mode of operation, the electrical energy of the on-board charger is fully used to charge the A vehicle power battery pack. The vehicle controller A is responsible for overall management, and controls the charging process of the vehicle-mounted charger to the power battery pack by acquiring power battery pack information and power grid load capacity information from the vehicle-mounted charger A and a vehicle battery management system A and matching maximum allowable charging current (voltage) with allowable charging current (voltage).
The multi-vehicle charging mode is as follows: the additional charging gun is inserted, the vehicle A and the vehicle B are connected through the additional charging gun, and the mode adopted by the vehicle-mounted charger of the vehicle A for charging is shared. In the running mode, the electric energy of the vehicle-mounted charger simultaneously charges the power battery pack of the vehicle A and the power battery pack of the vehicle B. The vehicle A vehicle controller is responsible for overall management, and maximum allowable charging current (voltage) and allowable charging current (voltage) are matched by obtaining vehicle A and vehicle B power battery pack information, power grid load capacity information and the like from a vehicle A vehicle-mounted charger, a vehicle A battery management system, a vehicle B vehicle controller and the like. And the vehicle controller of the vehicle A determines the power battery pack which is currently connected to the vehicle-mounted charger by outputting a PWM wave signal to the IGBT array. The accessed power battery pack adopts a pulse charging method and is kept in the charging cycle process of pulse charging-standing. Meanwhile, the standing time of the vehicle A and the standing time of the vehicle B are staggered, so that the utilization capacity of the charging power of the vehicle-mounted charger is improved.
As shown in fig. 2, the charging sequence of the vehicle-mounted charger shared by the vehicle a and the vehicle B in the multi-vehicle charging mode is shown. The vehicle-mounted charger continuously outputs pulse voltage. And the vehicle controller A controls the IGBT array to enable the power battery pack of the vehicle A to be connected with the vehicle-mounted charger. At the moment, the power battery pack of the vehicle A is in a pulse charging state, and the power battery pack of the vehicle B stands still. And after one charging pulse of the vehicle-mounted charger is finished, the vehicle controller of the vehicle A controls the IGBT array to disconnect the power battery pack of the vehicle A, so that the power battery pack of the vehicle B is connected to the vehicle-mounted charger. At the moment, the power battery pack of the vehicle A is in a standing state, and the power battery pack of the vehicle B is in a pulse charging state. And after the vehicle A is in a standing state, the vehicle controller of the vehicle A controls the IGBT array, so that the power battery pack of the vehicle A is connected to the vehicle-mounted charger, and the vehicle A enters a pulse charging state. Therefore, A, B vehicles are respectively in the charging cycle of pulse charging-standing, and the pulse charging stage and the standing stage of the two vehicles are staggered, so that the charging power utilization capacity of the vehicle-mounted charger is improved.
As shown in fig. 3, a schematic circuit diagram of an embodiment of a vehicle-mounted charger shared by a vehicle a and a vehicle B in the multi-vehicle charging mode is shown. The components in the figure can be divided into four parts according to the functions, namely: the system comprises a power grid part, an on-board charger part, a vehicle A high-voltage component and a vehicle B high-voltage component. The power grid part is responsible for acquiring energy from a power grid to charge the electric automobile, such as charging piles and the like. The on-board charger part is responsible for converting alternating current into pulsed direct current for charging the vehicle. In this example, the vehicle-mounted charger is equivalent to a dual-core AC/DC converter, and the input is an alternating current of a power grid and the output is a pulse current with adjustable voltage. The high-voltage component of the A vehicle comprises an IGBT array, a power battery pack, a DC/DC converter, a motor controller, a driving motor and the like. The IGBT array is controlled by the vehicle control unit to determine whether the battery pack is connected to the vehicle-mounted charger. The connection switch of the high-voltage component is controlled by the vehicle control unit, and the connection switch is completely disconnected during charging so as to ensure the safety of other high-voltage components. The high-voltage component of the B vehicle comprises an IGBT array, a power battery pack, a DC/DC converter, a motor controller, a driving motor and the like. The IGBT array is controlled by the vehicle control unit to determine whether the battery pack is connected to the vehicle-mounted charger. The connection switch of the high-voltage component is controlled by the vehicle control unit, and the connection switch is completely disconnected during charging so as to ensure the safety of other high-voltage components.
In fig. 3, a grid power supply 1 inputs an alternating current, wherein 2 and 5 are a pair of switches, a control current is output from the alternating current power supply, and 3 and 4 are a pair of switches, and the control current is reversely input from the alternating current power supply. Electric energy is filtered by an RL link consisting of 6 and 7 and then is input to a vehicle-mounted charger at the vehicle end through a transformer consisting of 8 and 9. The on-board charger can be equivalent to an AC/DC converter, where 14-17 is a set of control switches that control current flow to the right (forward, battery charging direction) and 18-21 is a set of control switches that control current flow to the left (reverse, battery discharging direction). And 24-27 are charging control switches of the A car and are used for adjusting duty ratios to control charging current of the A car. And 36-39 are charging control switches of the B car and are used for adjusting duty ratios to control charging current of the B car. 29-31 and 41-43 are vehicle-mounted high-voltage device control switches which are kept disconnected in the charging process.
The high-efficiency charging method provided by the invention can plug the plug of the vehicle-mounted charger into a household socket or a public charging facility to complete the charging of the power battery pack of the electric automobile. When the vehicle-mounted charger is connected with a power grid, the connected information is sent to the vehicle controller A, the vehicle controller A controls the vehicle-mounted charger to start charging the power battery pack of the vehicle A, in the process, the battery management system of the vehicle A monitors the voltage, the current, the temperature and the electric quantity information of the power battery pack in real time, and feeds back the information of the voltage, the current, the temperature, the electric quantity and the like to the vehicle controller A; when a charging gun is additionally arranged and inserted, the vehicle controller of the vehicle A controls the vehicle-mounted charger to charge the vehicle A and the vehicle B at the same time, the IGBT array is used for controlling only one power battery pack to be connected with the vehicle-mounted charger, and the charging method is the same as that described above.
Claims (3)
1. A multi-vehicle cooperation vehicle-mounted charging device is characterized by comprising a main vehicle-mounted charger, a main vehicle power battery pack, a secondary vehicle power battery pack, a main vehicle battery management system, a secondary vehicle battery management system, a main vehicle whole vehicle controller, a secondary vehicle whole vehicle controller, an IGBT array and an additional charging gun; the main vehicle-mounted charger is connected with an external power supply, is connected with the main vehicle power battery pack through an IGBT array, and charges the main vehicle power battery pack through current pulse of the IGBT array; the main vehicle battery management system is respectively connected with the main vehicle charger, the main vehicle power battery pack and the main vehicle whole vehicle controller, is used for monitoring voltage, current, temperature and electric quantity information in the main vehicle power battery pack in real time, and is communicated with the connected main vehicle charger through a CAN (controller area network) command to send the monitored information to the main vehicle whole vehicle controller; the main vehicle controller controls the on-off of the IGBT array by using a PWM (pulse-width modulation) wave according to a CAN (controller area network) command provided by a main vehicle battery management system; the IGBT array controls the connection between the main vehicle power battery pack and the main vehicle charger according to the PWM wave provided by the main vehicle controller; the additional charging gun is used for being connected with a slave vehicle power battery pack, the slave vehicle power battery pack is connected with a slave vehicle whole vehicle controller through a slave vehicle battery management system, the slave vehicle whole vehicle controller is connected with a master vehicle whole vehicle controller, and the master vehicle whole vehicle controller controls an IGBT array to be selectively connected into the slave vehicle power battery pack.
2. A multi-vehicle cooperation vehicle-mounted charging method is characterized by comprising two working modes, namely a single-vehicle charging mode and a multi-vehicle charging mode;
the bicycle charging mode is as follows: the vehicle-mounted charging device is only used for charging a power battery pack of one electric vehicle; in the running mode, the additional charging gun does not work, and the main vehicle-mounted charger only charges the power battery pack of one electric vehicle; the main vehicle controller controls the main vehicle charger to interactively obtain an allowable charging current value with a power grid through a CAN line, and interactively obtains the maximum allowable charging current and the maximum allowable charging voltage of the main vehicle power battery pack through the CAN line with a main vehicle battery management system to control the main vehicle power battery pack to be charged through the vehicle charger; in a single-vehicle charging mode, the main vehicle controller controls other high-voltage components except the main vehicle power battery pack to be completely disconnected, so that the charging safety of the power battery pack is improved;
the multi-vehicle charging mode is characterized in that: the vehicle-mounted charging device charges a power battery pack of a plurality of electric vehicles by additionally arranging a charging gun; in the running mode, a charging gun is additionally arranged to enable the power battery packs of a plurality of automobiles to be connected in parallel, and the whole main automobile controller controls an IGBT array to enable different power battery packs to be sequentially connected to a main automobile charger to be charged in a pulse charging mode; in the running mode, the whole main vehicle controller controls the on-off state of the IGBT array, so that only one power battery pack is connected to the vehicle-mounted charger to be charged at each time, and the charging time does not exceed the standing period of pulse charging of other battery packs; the main vehicle controller controls the parallel multi-vehicle power battery packs to be in a pulse charging-standing cyclic charging process; under the multi-vehicle charging mode, the vehicle control unit controls all other high-voltage components except the power battery pack to be disconnected, and the charging safety of the power battery pack is improved.
3. The multi-vehicle cooperative vehicle-mounted charging method according to claim 2, wherein the charging sequence in the multi-vehicle charging mode is as follows: the main vehicle-mounted charger continuously outputs pulse voltage, the main vehicle controller controls the IGBT array to enable the main vehicle power battery pack to be connected into the main vehicle-mounted charger, and at the moment, the main vehicle power battery pack is in a pulse charging state and the auxiliary vehicle power battery pack stands still; after one charging pulse of the vehicle-mounted charger is finished, the main vehicle whole controller controls the IGBT array to disconnect the main vehicle power battery pack, so that the auxiliary vehicle power battery pack is connected to the main vehicle-mounted charger, and the main vehicle power battery pack stands still at the moment, and the auxiliary vehicle power battery pack is in a pulse charging state; after the main vehicle stands still, the main vehicle controller controls the IGBT array, so that the main vehicle power battery pack is connected to the vehicle-mounted charger, and the main vehicle enters a pulse charging state; so that the A, B cars are respectively in the charging cycle of pulse charging-standing, and the pulse charging phase and the standing phase of the two cars are staggered.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010005890.0A CN111130178B (en) | 2020-01-03 | 2020-01-03 | Multi-vehicle cooperation vehicle-mounted charging device and method |
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| CN202010005890.0A CN111130178B (en) | 2020-01-03 | 2020-01-03 | Multi-vehicle cooperation vehicle-mounted charging device and method |
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| CN111130178A true CN111130178A (en) | 2020-05-08 |
| CN111130178B CN111130178B (en) | 2022-03-08 |
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| CN202010005890.0A Active CN111130178B (en) | 2020-01-03 | 2020-01-03 | Multi-vehicle cooperation vehicle-mounted charging device and method |
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