CN112918293A - Accompanying-driving quick charging system and control method thereof - Google Patents
Accompanying-driving quick charging system and control method thereof Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/30—Constructional details of charging stations
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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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
- Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
- Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
- Y04S30/12—Remote or cooperative charging
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- Engineering & Computer Science (AREA)
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- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
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Abstract
本发明公开一种伴随行驶快速充电系统及其控制方法，该控制方法包括以下步骤：移动供电装置与电动汽车通过线束连接，移动供电装置解锁上电，系统启动；移动供电装置和电动汽车进行握手通信，移动供电装置获取电动汽车的电池荷电状态SOC值，当电池荷电状态SOC值小于第一阈值时，则移动供电装置为电动汽车进行充电；当电池荷电状态SOC值大于第二阈值时，移动供电装置停止为电动汽车充电，其中第一阈值大于第二阈值。本发明通过设置移动供电装置，可以满足在行驶的状态下，把电动汽车的电池充满，而当充满以后，则又可以在服务器拆下后车的移动供电装置，降低能耗，减少充电的等待时间；还可以提高转换效率，其系统的结构简单、可靠性高，方便维修。
The invention discloses a fast charging system for accompanying driving and a control method thereof. The control method includes the following steps: connecting a mobile power supply device and an electric vehicle through a wire harness, unlocking the mobile power supply device to power on, and starting the system; and shaking hands between the mobile power supply device and the electric vehicle Communication, the mobile power supply device obtains the battery state of charge SOC value of the electric vehicle, when the battery state of charge SOC value is less than the first threshold, the mobile power supply device charges the electric vehicle; when the battery state of charge SOC value is greater than the second threshold value When the mobile power supply device stops charging the electric vehicle, the first threshold is greater than the second threshold. By setting the mobile power supply device in the present invention, the battery of the electric vehicle can be fully charged in the driving state, and when the battery is fully charged, the mobile power supply device of the rear vehicle can be removed from the server, thereby reducing energy consumption and waiting for charging. It can also improve the conversion efficiency, and the system has a simple structure, high reliability and convenient maintenance.
Description
Technical Field
The invention relates to the field of electric automobiles, in particular to a rapid charging system accompanying with driving and a control method thereof.
Background
With the popularization and rapid growth of electric vehicles, in order to solve charging wait time anxiety of electric vehicles, the accompanying mobile charging problem of electric vehicles has to be considered. At present, electric automobiles mainly have two charging modes, one is quick charging, and the other is battery replacement. However, the existing quick charging mode needs a corresponding quick charging station and a corresponding quick charging pile, and the two charging piles are small in number, so that the existing battery quick charging technology is immature and cannot meet the charging requirement of the electric vehicle; the battery replacement mode is difficult to unify the standards of batteries of different vehicle types; therefore, the above two schemes cannot solve the problem of mileage anxiety.
The problem of charging waiting anxiety of the electric automobile is solved in order to meet the existing quick charging. The existing electric automobile charging system is provided with a power supply trailer in a trailer manner, namely, the power supply trailer which is moved along with the electric automobile is dragged behind the electric automobile, and when the electric automobile needs to be charged, the power supply trailer can be connected, so that the power supply trailer can be charged for the electric automobile. However, the existing power supply trailer has a complex structure and is not practical, so that the reliability of the power supply trailer is poor, and the maintenance is complex; in addition, the existing system needs to supply power to the whole electric automobile through a charger or a charger, and the system structure has the conditions of low power, low and unreasonable conversion efficiency and complex charging protocol.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides the accompanying driving quick charging system which is high in conversion efficiency, simple in structure, high in reliability and convenient to maintain and the control method thereof.
The purpose of the invention is realized by the following technical scheme:
a travel-accompanied quick charging system comprising: the mobile power supply device is electrically connected with the electric automobile;
the mobile power supply device comprises a trailer battery pack, a power supply battery management system and a current converter, wherein the trailer battery pack is electrically connected with the power supply battery management system, and the power supply battery management system is electrically connected with the current converter;
the electric automobile comprises an electric management device, a power battery pack and a vehicle control unit, wherein the current converter supplies power to the electric management device through a power receiving interface, the electric management device is electrically connected with the power battery pack, and the electric management device is electrically connected with the vehicle control unit.
In one embodiment, the traveling-accompanied quick charging system further includes a low-voltage electrical connector electrically connected to the mobile power supply device, a high-voltage electrical connector electrically connected to the electric vehicle, and a mechanical connection structure for connecting the mobile power supply device to the electric vehicle.
In one embodiment, the mobile power supply device further comprises an OBD diagnostic interface, and the OBD diagnostic interface is in communication connection with the power supply battery management system.
In one embodiment, the mobile power supply device further comprises a remote monitoring system, and the remote monitoring system is in communication connection with the power supply battery management system.
In one embodiment, the mobile power supply device further comprises a wireless charging module, and the wireless charging module is electrically connected with the power supply battery management system.
The invention also provides a control method based on the rapid charging system with driving, which comprises the following steps:
s100, connecting the mobile power supply device with the electric automobile through a wire harness, unlocking and electrifying the mobile power supply device, and starting a system;
s200, the mobile power supply device and the electric automobile perform handshake communication, the mobile power supply device obtains a battery state of charge (SOC) value of the electric automobile, and when the SOC value of the battery is smaller than a first threshold value, the mobile power supply device charges the electric automobile;
s300, when the SOC value of the battery is larger than a second threshold value, the mobile power supply device stops charging the electric automobile, wherein the first threshold value is larger than the second threshold value.
In one embodiment, the step S100 specifically includes:
s110, the mobile power supply device is connected with the electric automobile through a cable, whether a CC2 detection signal exists in the cable or not is judged, and if yes, the connection is successful;
s120, the mobile power supply device is connected with the electric automobile through a mechanical connection structure, the electric automobile sends an interlocking instruction to the mobile power supply device, and the mobile power supply device responds to and executes the interlocking instruction;
s130, scanning an information label on the mobile power supply device, sending an unlocking application instruction, receiving and sending an unlocking instruction by a background, and responding and executing the unlocking instruction by the mobile power supply device;
s140, closing a starting button by the mobile power supply device;
and S150, powering on the system and starting working.
In one embodiment, the information tag comprises a two-dimensional code or a bar code.
In one embodiment, after step S100, a BMS self-test operation is further included, and the BMS self-test operation specifically includes:
s101, a power supply battery management system of the mobile power supply device acquires a wake-up signal;
s102, starting the power supply battery management system, detecting whether serious fault information exists, and if so, executing a step S103; if not, normally starting the mobile power supply device;
and S103, the power supply battery management system reports the serious fault information, and the mobile power supply device receives and displays the serious fault information.
In one embodiment, the step of performing handshake communication between the mobile power supply device and the electric vehicle specifically includes:
s210, the mobile power supply device sends a rear vehicle handshake message to the electric automobile, and when the electric automobile confirms that the rear vehicle handshake message is received, the electric automobile sends a BMS (battery management system) and vehicle handshake message;
and S220, the mobile power supply device acquires the BMS and vehicle handshake messages, and then the handshake communication is completed.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention relates to a rapid charging system along with driving and a control method thereof.A mobile power supply device is arranged, so that the battery of an electric automobile can be fully charged in the driving state, and the mobile power supply device of a rear automobile can be detached from a server after the battery is fully charged, thereby reducing the energy consumption and the waiting time of charging; the whole vehicle communication or control of the electric vehicle is isolated from the mobile power supply device of the rear vehicle, so that the driving safety and stability are not influenced; moreover, the electric automobile can complete the connection and assembly of the system only by adding a power receiving interface and without changing a high-voltage loop; in addition, by arranging the mobile power supply device, the conversion efficiency can be effectively improved, the system is simple in structure and high in reliability, and a user can conveniently maintain the system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a rapid charging system with driving according to an embodiment of the present invention;
FIG. 2 is a functional schematic diagram of a rapid charging system with driving according to an embodiment of the present invention;
FIG. 3 is a functional schematic diagram of the electric vehicle of the embodiment shown in FIG. 2;
FIG. 4 is a functional diagram of an electric vehicle according to one embodiment shown in FIG. 3;
FIG. 5 is a functional schematic diagram of an electric vehicle according to another embodiment shown in FIG. 3;
fig. 6 is a functional schematic diagram of an electric vehicle according to a second embodiment shown in fig. 2;
fig. 7 is a functional schematic diagram of an electric vehicle according to a third embodiment shown in fig. 2;
FIG. 8 is a functional schematic diagram of another embodiment of the rapid charge system with driving shown in FIG. 2;
fig. 9 is a flowchart of a control method of the rapid charging system with driving according to an embodiment of the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 and 2, a rapid charging system with driving includes: the electric vehicle comprises a mobile power supply device 10 and an electric vehicle 20, wherein the mobile power supply device 10 is electrically connected with the electric vehicle 20. The mobile power supply device 10 is used for supplying power to an electric vehicle; the electric vehicle 20 is used to tow the rear mobile power supply apparatus 10.
The mobile power supply device 10 is used for supplementing energy of the electric automobile, and mainly functions to transfer the energy to the electric automobile in time, and meanwhile, the energy flow of the mobile power supply device is unidirectional, so that the system stability and simplicity are benefited.
Referring to fig. 2, in this embodiment, the system for fast charging along with driving further includes a low voltage electrical connector 30, a high voltage electrical connector 40 and a mechanical connection structure 50, in this embodiment, the mechanical connection structure includes a contact sensor, the low voltage electrical connector is electrically connected to the mobile power supply device, the low voltage electrical connector is electrically connected to the electric vehicle, two ends of the high voltage electrical connector 40 are electrically connected to a current transformer of the mobile power supply device and a power receiving interface of the electric vehicle, respectively, and the mechanical connection structure 50 is used for connecting the mobile power supply device 10 to the electric vehicle 20. It should be noted that, the low-voltage electrical connector 30 and the high-voltage electrical connector 40 are high-voltage cables and low-voltage cables, so that the connection between the mobile power supply device and the high-voltage cable and the low-voltage cable of the electric vehicle is mechanically connected with a series interlocking contact sensor, and the contact sensor is connected with a battery management system BMS of the mobile power supply device, so that whether the connection is connected with the electric vehicle can be judged, and meanwhile, the interlocking is realized on the control logic, and the safety performance is better.
Referring to fig. 2, the mobile power supply device 10 includes a trailer battery pack 100, a power supply battery management system 200 and a current converter 300, wherein the trailer battery pack is electrically connected to the power supply battery management system, and the power supply battery management system is electrically connected to the current converter. It should be noted that the trailer battery pack 100 is used for supplying power to the mobile power supply device and the electric vehicle; the battery management system 200 is used to manage the trailer battery pack. The current converter 300 is used to output different voltages, and the actual voltage may be controlled by the power supply battery management system 200.
Referring to fig. 2, the electric vehicle 20 includes an electric management device 400, a power battery pack 500 and a vehicle control unit 600, the current transformer 300 supplies power to the electric management device 400 through a power receiving interface 700, the electric management device 400 is electrically connected to the power battery pack 500, and the electric management device 400 is electrically connected to the vehicle control unit 600. The electric control device 400 is used to control the power input, output, and charging modes of the entire vehicle; the power battery pack 500 is used for providing power for the electric automobile; the vehicle control unit 600 is used for controlling the operation of the vehicle.
So, through setting up power supply battery management system and current transformer in mobile power supply device, can directly supply power for the electronic management device among the electric automobile to can be so that entire system simple structure, reliability height and easy maintenance, in addition, through setting up the mode of direct power supply, can be so that entire system's control strategy is simpler, and through setting up current transformer, can provide different voltages for electric automobile. The mobile power supply device provides a simple and reliable charging circuit of the electric automobile, is similar to a UPS bypass function, the high-voltage box does not need a double-circuit, a whole vehicle controller does not need to participate in control, the compatibility with the electric automobile is good, and the electric automobile does not need to be greatly changed.
It should be noted that the current converter is a DC-DC current converter, and the DC-DC current converter adjusts the corresponding power supply output according to the charging voltage and current power requirements of the electric vehicle to meet the driving and charging requirements of the electric vehicle, and the modular design of the system can be combined to increase or decrease the power.
Referring to fig. 3, in one embodiment, the electric management apparatus 400 includes a first battery management system 411 and a first combination controller 412, the first battery management system 411 is electrically connected to the power receiving interface 700, and the first battery management system 411 is electrically connected to the first combination controller 412. It should be noted that the first battery management system 411 is used to connect the current converter 300 of the mobile power supply device through the power receiving interface, so that the voltage of the mobile power supply device can be directly connected into the first battery management system 411, and then output to the first combination controller 412 through the first battery management system 411; the first combination controller 412 is used to control the motor.
In one embodiment of the present invention, referring to fig. 4, the first combination controller 412 includes a first high voltage box 412a and a first motor controller 412b, the first high voltage box is electrically connected to the first battery management system, and the first high voltage box is electrically connected to the first motor controller. It should be noted that the first high voltage box 412a and the first motor controller 412b are separate structures, so that convenience of maintenance can be ensured.
The trailer battery pack of the mobile power supply device is connected to a motor controller of the electric automobile through a current converter, the battery pack of the electric automobile is also connected to the motor controller of the electric automobile, and the high-voltage box or the three-in-one motor controller is used for energy distribution; rather than a complicated system to frequently switch the operation of the battery of the electric vehicle and the battery of the mobile power supply device, the system can be made simpler and more reliable.
In another embodiment of the present invention, referring to fig. 5, the first high voltage box 412c and the first motor controller 412d are integrated. Further, the first combination controller 412 may be an integrated three-in-one controller, a four-in-one controller, or an integrated controller, or may be a separate structure of a high voltage box and a motor controller, and may be selected according to the design requirement of the actual system.
Referring to fig. 6, in a second embodiment, the electric management device 400 includes a second combination controller 421 and a second battery management system 422, the second combination controller 421 is electrically connected to the power receiving interface 700, the second combination controller 421 is electrically connected to the second battery management system 422, and both the second battery management system 422 and the second combination controller 421 are electrically connected to the vehicle controller. In this embodiment, the current converter 300 of the mobile power supply device is connected through the second combination controller 421, that is, the high voltage of the current converter 300 firstly passes through the second combination controller 421 and then enters the second battery management system 422, and finally enters the power battery pack 500 through the second battery management system 422, and the second combination controller 421 is an integrated or separated controller, as in the two embodiments of the first embodiment, which is not described herein again.
Referring to fig. 7, in a third embodiment, the electrical management apparatus 400 includes a second high voltage box 431, a second motor controller 432, and a third battery management system 433, wherein the second high voltage box 431 is electrically connected to the power receiving interface 700, the second high voltage box 431 is electrically connected to the third battery management system 433, the second high voltage box 431 is electrically connected to the second motor controller 432, and both the third battery management system 433 and the second motor controller 432 are electrically connected to the vehicle control unit. In this embodiment, the second high voltage box 431 is directly connected to the power receiving interface, so that the high voltage of the current converter 300 can be directly connected, and then the high voltage box distributes power to the second motor controller 432 and the third battery management system 433, so that the high voltage box distributes power automatically, and a part of the power is used for driving the motor of the electric vehicle, and a part of the power is used for charging the battery of the electric vehicle. Therefore, the high-voltage box is arranged to distribute the voltage and the power, so that the working control strategy of the system is simple, and the reliability of the system is further improved.
Further, in the control logic, a part of electric quantity of the mobile power supply device is supplied to a motor of the electric automobile, and a part of electric quantity is supplied to a battery pack of the electric automobile; the two channels transfer the electric quantity of the mobile power supply device at the same time, and the energy of the mobile power supply device is released in the fastest time to the greatest extent.
Referring to fig. 8, the power supply battery management system 200 further includes a temperature sensor, a current sensor, a cell temperature detection module, and a voltage detection circuit, and is configured to monitor the single batteries in the battery pack. The power supply battery management system 200 further includes a battery monitoring system for detecting the insulation resistance, the high-voltage interlock detection result, the voltage, the current, and the temperature of the battery cells of the trailer power battery pack, the total voltage, the total current, and the temperature of the battery pack cells.
Referring to fig. 2 and 8, the mobile power supply device further includes an OBD diagnostic interface, and the OBD diagnostic interface is in communication connection with the power supply battery management system. Therefore, convenience in subsequent program upgrading and fault detection is ensured by arranging the OBD diagnosis interface. Further, the OBD diagnosis interface is used for connecting the vehicle-mounted diagnosis system. The system monitors the running state of the engine and the working state of the exhaust gas after-treatment system at any time, and immediately sends out a warning once a fault condition is found.
Referring to fig. 2 and 8, the mobile power supply device further includes a remote monitoring system, and the remote monitoring system is in communication connection with the power supply battery management system. The remote monitoring system comprises unlocking wakeup, parameter monitoring of a battery, parameter monitoring of DC-DC, position information, OTA remote upgrade software and the like.
Referring to fig. 2 and 8, the mobile power supply device further includes a wireless charging module, and the wireless charging module is electrically connected to the power supply battery management system. It should be noted that, the charging of the mobile power supply device also supports the wireless charging mode in addition to the conventional fast and slow charging; and the direct current quick charging is realized by directly charging the battery pack through an external direct current charging pile by reserving a direct current charging interface. And the slow charging is realized by connecting an AC/DC module circuit with an external AC 220V commercial power through a reserved AC charging interface. The wireless charging needs to be matched with a ground wireless charging induction coil to realize induction charging.
The charging loop and the discharging loop of the mobile power supply device are isolated, so that the charging safety is ensured. Namely, the self power supplement of the battery pack of the mobile power supply device is separated from the output of the current changer of the mobile power supply device (the DC-DC current changer only outputs in a single direction), so that the charging and discharging system of the mobile power supply device is completely isolated, and the stability and the safety of the mobile power supply device are ensured.
Referring to fig. 2, the mobile power supply device 10 further includes a tail light, the tail light is electrically connected to the tail light of the electric vehicle through a low voltage cable, and is controlled by a vehicle control unit of the electric vehicle, so as to ensure consistency between the tail light of the electric vehicle and the tail light of the mobile power supply device 10.
In addition, the power receiving interface of the electric vehicle has 9-core functional definitions, which are respectively as follows: the plug is provided with a connection locking aviation connector, the plug is provided with CC1 to detect PE resistance to ensure that the plug is inserted in place, and a DC/DC converter detects a plug position interlocking signal to control high-voltage electrification, so that the mobile power supply device 10 is connected with the electric automobile 20.
Referring to fig. 9, the present invention further provides a control method based on the above-mentioned fast charging system with driving, which includes the following steps:
s100, connecting a mobile power supply device with the electric automobile through a wire harness, unlocking and electrifying the mobile power supply device, and starting a system; the mobile power supply device is a rear vehicle device following the electric vehicle, the electric vehicle is used as a front vehicle to draw the rear vehicle device to run and move, and the rear vehicle device can supply power to the electric vehicle during running. And the front vehicle device and the rear vehicle device are connected through the wire harness, so that the front electric vehicle can be stably supplied with power. In addition, after the line is connected, the mobile power supply device needs to be scanned and unlocked and/or switched on and off, so that the control of the mobile power supply device can be improved, and the reliability of the system can be improved.
Step S200, the mobile power supply device and the electric automobile carry out handshake communication, the mobile power supply device obtains a battery state of charge (SOC) value of the electric automobile, and when the SOC value is smaller than a first threshold value, the mobile power supply device charges the electric automobile. It should be noted that, before the mobile power supply device charges the electric vehicle, the wiring harness needs to be connected first, and then the mobile power supply device and the electric vehicle need to be connected in a handshaking communication manner, so that the electric vehicle in the front vehicle can be powered.
Step S300, when the SOC value of the battery is larger than a second threshold value, the mobile power supply device stops charging the electric automobile, wherein the first threshold value is larger than the second threshold value. Further, after the connection of the previous sequence is completed, the power supply phase may be performed. In the process, the mobile power supply device firstly needs to detect the SOC value in the battery pack of the electric automobile, when the SOC value is smaller than a first threshold value, the electric automobile needs to be charged, otherwise, the electric automobile does not need to be charged; and during the charging process, the SOC value of the battery pack is detected in real time, and when the SOC value of the battery pack reaches the second threshold value, the power supply can be stopped. In this embodiment, the first threshold may be 75% to 85% of the state of charge of the entire battery pack, for example, the first threshold may be 77%, 80% or 83% of the entire SOC, and the second threshold may be 90% to 98% of the battery pack, for example, the second threshold may be 92%, 95% or 97% of the entire SOC. Therefore, as long as the above conditions are met, the electric vehicle can be charged or stopped to finish the power supply operation of the electric vehicle.
Therefore, by arranging the mobile power supply device, the battery of the electric automobile can be fully charged in a driving state, and after the battery is fully charged, the mobile power supply device of the rear automobile can be detached from the server, so that the energy consumption is reduced, and the waiting time for charging is shortened; the whole vehicle communication or control of the electric vehicle is isolated from the mobile power supply device of the rear vehicle, so that the driving safety and stability are not influenced; and the electric automobile can complete the connection and assembly of the system only by adding one path of power receiving interface and not changing the high-voltage loop.
In an embodiment, the step S100 specifically includes:
step S110, the mobile power supply device is connected with the electric automobile through a cable, whether a CC2 detection signal exists in the cable or not is judged, and if yes, the connection is successful;
step S120, the mobile power supply device is connected with the electric automobile through a mechanical connection structure, the electric automobile sends an interlocking instruction to the mobile power supply device, and the mobile power supply device responds to and executes the interlocking instruction;
step S130, scanning an information label on the mobile power supply device, sending an unlocking application instruction, receiving and sending an unlocking instruction by a background, and responding and executing the unlocking instruction by the mobile power supply device;
step S140, the mobile power supply device closes a starting button;
and step S150, powering on the system and starting working.
It should be noted that, when the steps S110 to S140 in the above are simultaneously satisfied, the system is powered on. In addition, the sequence of steps S130 and S140 may be set according to actual needs, and the sequence of the two steps is not limited herein, and the system may normally supply power to the electric vehicle only under the condition that the safety and reliability of the system are ensured. In this embodiment, the information tag includes a two-dimensional code or a barcode. Therefore, the user can conveniently carry out connection and remote control.
In another embodiment, after step S100, a BMS self-test operation is further included, and the BMS self-test operation specifically includes:
s101, a power supply battery management system of the mobile power supply device acquires a wake-up signal;
step S102, starting the power supply battery management system, detecting whether serious fault information exists, and if so, executing step S103; if not, normally starting the mobile power supply device;
and step S103, the power supply battery management system reports the serious fault information, and the mobile power supply device receives and displays the serious fault information.
It should be noted that in step S102, a slight fault, a medium fault, or a serious fault of the system may also be detected, and in the case of a slight fault, the fault is only reported and displayed in the electric vehicle and the cloud service background of the system. And if the medium fault occurs, the discharge power is limited in real time while reporting and displaying until the fault is recovered. And if the fault is serious, reporting to display that the BMS system prohibits high-voltage output until the fault is recovered. Therefore, the BMS self-checking step is arranged, the self-checking efficiency can be effectively improved, and the reliability and the safety of the system are improved.
In another embodiment, the step of performing handshake communication between the mobile power supply device and the electric vehicle specifically includes:
s210, the mobile power supply device sends a rear vehicle handshake message to the electric automobile, and when the electric automobile confirms that the rear vehicle handshake message is received, the electric automobile sends a BMS (battery management system) and vehicle handshake message;
and S220, the mobile power supply device acquires the BMS and vehicle handshake messages, and then the handshake communication is completed.
It needs to be further explained that the high-voltage circuits arranged in the high-voltage boxes in the front vehicle are connected in parallel, the electric energy provided by the distribution device is received, the power requirements of the running and other electric appliances of the front vehicle are met, and the rest power is supplied for the power battery of the front vehicle.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention relates to a rapid charging system along with driving and a control method thereof.A mobile power supply device is arranged, so that the battery of an electric automobile can be fully charged in the driving state, and the mobile power supply device of a rear automobile can be detached from a server after the battery is fully charged, thereby reducing the energy consumption and the waiting time of charging; the whole vehicle communication or control of the electric vehicle is isolated from the mobile power supply device of the rear vehicle, so that the driving safety and stability are not influenced; moreover, the electric automobile can complete the connection and assembly of the system only by adding a power receiving interface and without changing a high-voltage loop; in addition, by arranging the mobile power supply device, the conversion efficiency can be effectively improved, the system is simple in structure and high in reliability, and a user can conveniently maintain the system.
The above embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A travel-accompanied quick charging system characterized by comprising: the mobile power supply device is electrically connected with the electric automobile;
the mobile power supply device comprises a trailer battery pack, a power supply battery management system and a current converter, wherein the trailer battery pack is electrically connected with the power supply battery management system, and the power supply battery management system is electrically connected with the current converter;
the electric automobile comprises an electric management device, a power battery pack and a vehicle control unit, wherein the current converter supplies power to the electric management device through a power receiving interface, the electric management device is electrically connected with the power battery pack, and the electric management device is electrically connected with the vehicle control unit.
2. The traveling accompanying quick charge system according to claim 1, further comprising a low-voltage electrical connector electrically connected to the mobile power supply device, a high-voltage electrical connector electrically connected to the electric vehicle, both ends of the high-voltage electrical connector being electrically connected to the current transformer and the power receiving interface, respectively, and a mechanical connection structure for connecting the mobile power supply device to the electric vehicle.
3. The rapid charging system as accompanied by travel according to claim 2, wherein the mobile power supply device further comprises an OBD diagnostic interface communicatively coupled with the power supply battery management system.
4. The system for rapid charging while traveling according to claim 2, wherein the mobile power supply device further comprises a remote monitoring system, and the remote monitoring system is connected in communication with the power supply battery management system.
5. The system for rapid charging while traveling according to claim 4, wherein the mobile power supply device further comprises a wireless charging module electrically connected to the power supply battery management system.
6. The control method of the rapid charging system with driving according to any one of claims 1 to 5, characterized by comprising the steps of:
s100, connecting the mobile power supply device with the electric automobile through a wire harness, unlocking and electrifying the mobile power supply device, and starting a system;
s200, the mobile power supply device and the electric automobile perform handshake communication, the mobile power supply device obtains a battery state of charge (SOC) value of the electric automobile, and when the SOC value of the battery is smaller than a first threshold value, the mobile power supply device charges the electric automobile;
s300, when the SOC value of the battery is larger than a second threshold value, the mobile power supply device stops charging the electric automobile, wherein the first threshold value is larger than the second threshold value.
7. The method for controlling a rapid charging system accompanying travel according to claim 6, wherein the step S100 specifically includes:
s110, the mobile power supply device is connected with the electric automobile through a cable, whether a CC2 detection signal exists in the cable or not is judged, and if yes, the connection is successful;
s120, the mobile power supply device is connected with the electric automobile through a mechanical connection structure, the electric automobile sends an interlocking instruction to the mobile power supply device, and the mobile power supply device responds to and executes the interlocking instruction;
s130, scanning an information label on the mobile power supply device, sending an unlocking application instruction, receiving and sending an unlocking instruction by a background, and responding and executing the unlocking instruction by the mobile power supply device;
s140, closing a starting button by the mobile power supply device;
and S150, powering on the system and starting working.
8. The control method of the rapid charging system with traveling according to claim 7, wherein the information tag includes a two-dimensional code or a barcode.
9. The control method of the rapid charging system accompanied by driving according to claim 6, further comprising a BMS self-test operation after step S100, the BMS self-test operation specifically comprising:
s101, a power supply battery management system of the mobile power supply device acquires a wake-up signal;
s102, starting the power supply battery management system, detecting whether serious fault information exists, and if so, executing a step S103; if not, normally starting the mobile power supply device;
and S103, the power supply battery management system reports the serious fault information, and the mobile power supply device receives and displays the serious fault information.
10. The control method of the rapid charging system accompanied by driving according to claim 6, wherein the step of performing handshake communication between the mobile power supply device and the electric vehicle specifically comprises:
s210, the mobile power supply device sends a rear vehicle handshake message to the electric automobile, and when the electric automobile confirms that the rear vehicle handshake message is received, the electric automobile sends a BMS (battery management system) and vehicle handshake message;
and S220, the mobile power supply device acquires the BMS and vehicle handshake messages, and then the handshake communication is completed.
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| CN202110210846.8A CN112918293A (en) | 2021-02-25 | 2021-02-25 | Accompanying-driving quick charging system and control method thereof |
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Address after: 516006 self owned plant of plot zkd-005-02, Sanhe Village, Tonghu Town, Zhongkai high tech Zone, Huizhou City, Guangdong Province Applicant after: Guangdong Yiding New Energy Vehicle Co.,Ltd. Address before: 516006 self owned plant of plot zkd-005-02, Sanhe Village, Tonghu Town, Zhongkai high tech Zone, Huizhou City, Guangdong Province Applicant before: GUANGDONG YIDING NEW ENERGY AUTOMOBILE Co.,Ltd. |