CN112389216A - Vehicle wireless charging control method, vehicle-end controller and wireless charging system - Google Patents

Vehicle wireless charging control method, vehicle-end controller and wireless charging system Download PDF

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Publication number
CN112389216A
CN112389216A CN201910701733.0A CN201910701733A CN112389216A CN 112389216 A CN112389216 A CN 112389216A CN 201910701733 A CN201910701733 A CN 201910701733A CN 112389216 A CN112389216 A CN 112389216A
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China
Prior art keywords
charging
vehicle
controller
voltage
ground
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Pending
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CN201910701733.0A
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Chinese (zh)
Inventor
贺虹
王晓媛
刘立志
范春鹏
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Beijing Electric Vehicle Co Ltd
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Beijing Electric Vehicle Co Ltd
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Priority to CN201910701733.0A priority Critical patent/CN112389216A/en
Publication of CN112389216A publication Critical patent/CN112389216A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/12—Inductive energy transfer
    • 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
    • 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
    • B60L53/68—Off-site monitoring or control, e.g. remote control
    • 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
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • 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
    • B60L2210/00—Converter types
    • B60L2210/20—AC to AC converters
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The embodiment of the invention provides a vehicle wireless charging control method and a vehicle-end controller, namely a wireless charging system, wherein two control switches are arranged on an AC-DC conversion circuit of a vehicle-end charging circuit connected with the vehicle-end controller, the two control switches are respectively connected with two rectifier diodes connected with the same output end of the vehicle-end charging circuit in parallel, and the control method comprises the following steps: acquiring actual charging parameters of a vehicle-end charging circuit and preset charging protection parameters of a power battery; comparing the actual charging parameter with a preset charging protection parameter to obtain a comparison result; and when the charging protection is determined to be needed according to the comparison result, controlling the two control switches to be switched to the closed state. According to the technical scheme, when charging protection is needed, the connection between the power battery and the charging circuit can be quickly disconnected, so that the power battery is favorably prevented from being damaged due to out-of-control voltage and current caused by communication delay, and the reliability of the whole system is improved.

Description

Vehicle wireless charging control method, vehicle-end controller and wireless charging system
Technical Field
The invention relates to the technical field of wireless charging, in particular to a control method for wireless charging of a vehicle, a vehicle-end controller and a wireless charging system.
Background
In the existing wireless charging system, a ground end coil and a vehicle end coil are in a separated state, the ground end is controlled by a ground end controller, the vehicle end coil is controlled by a vehicle end controller, and the ground end controller and the vehicle end controller are primary and secondary sides, and the wireless communication technology is adopted to realize data interaction such as voltage, current and the like. However, data interaction is performed through wireless communication, the time period is long, the quick response and control of the charging current/voltage are not ideal, the charging current/voltage cannot be optimal, once communication abnormality occurs, the charging voltage/current may be out of control, the system reliability is directly affected, and the charged battery is damaged.
Disclosure of Invention
The technical purpose to be achieved by the embodiment of the invention is to provide a control method for vehicle wireless charging, a vehicle-end controller and a wireless charging system, which are used for solving the problems that the current wireless charging system is low in reliability and cannot realize quick response and control.
In order to solve the above technical problem, an embodiment of the present invention provides a control method for wireless charging of a vehicle, which is applied to a vehicle-end controller, wherein two control switches are arranged on an AC-DC conversion circuit of a vehicle-end charging circuit connected to the vehicle-end controller, and the two control switches are respectively connected in parallel with two rectifier diodes connected to a same output end of the vehicle-end charging circuit, and the control method includes:
acquiring actual charging parameters of a vehicle-end charging circuit and preset charging protection parameters of a power battery;
comparing the actual charging parameter with a preset charging protection parameter to obtain a comparison result;
and when the charging protection is determined to be needed according to the comparison result, controlling the two control switches to be switched to the closed state.
Specifically, in the control method described above, the actual charging parameters include: actual charging voltage and/or actual charging current;
presetting the charging protection parameters comprises the following steps: presetting a charging protection voltage and a charging protection current;
and when the actual charging voltage is greater than the preset charging protection voltage and/or the actual charging current is greater than the preset charging protection current, determining that charging protection is required.
Preferably, as the control method described above, after the step of controlling the two control switches to be switched to the closed state, the control method further includes:
acquiring the current voltage and the charge allowable voltage of the power battery;
and when the current voltage is less than the charge allowable voltage, controlling the two control switches to be switched to an off state.
Preferably, as the control method described above, the control method further includes:
when a charging completion signal is received, sending a shutdown signal to the ground controller, and controlling the two control switches to be switched to a closed state;
and when a shutdown confirmation signal sent by the ground controller is received, controlling the two control switches to be switched to a disconnected state, wherein the shutdown confirmation signal is sent when the ground controller detects that the voltage at the two ends of the bus capacitor is less than a preset voltage.
Another preferred embodiment of the present invention further provides a vehicle-end controller, wherein two control switches are disposed on an AC-DC conversion circuit of a vehicle-end charging circuit connected to the vehicle-end controller, and the two control switches are respectively connected in parallel to two rectifier diodes connected to a same output terminal of the vehicle-end charging circuit, and the vehicle-end controller includes:
the first acquisition module is used for acquiring the actual charging parameters of a vehicle-end charging circuit and the preset charging protection parameters of the power battery;
the first processing module is used for comparing the actual charging parameter with the preset charging protection parameter to obtain a comparison result;
and the second processing module is used for controlling the two control switches to be switched to a closed state when the charging protection is determined to be required according to the comparison result.
Preferably, the vehicle end controller as described above, further comprises:
the second acquisition module is used for acquiring the current voltage and the charging allowable voltage of the power battery;
and the third processing module is used for controlling the two control switches to be switched to an off state when the current voltage is less than the charging allowable voltage.
Preferably, the vehicle end controller as described above, further comprises:
the fourth processing module is used for sending a shutdown signal to the ground controller and controlling the two control switches to be switched to a closed state when receiving the charging completion signal;
and the fifth processing module is used for controlling the two control switches to be switched to a disconnected state when a shutdown confirmation signal sent by the ground controller is received, wherein the shutdown confirmation signal is sent when the ground controller detects that the voltage at the two ends of the bus capacitor is smaller than a preset voltage.
Still another preferred embodiment of the present invention also provides a vehicle including: the vehicle end controller as described above.
Still another preferred embodiment of the present invention also provides a wireless charging system for a vehicle, including: the ground controller, the ground charging circuit, the vehicle charging circuit and the vehicle controller are arranged in the vehicle;
the ground end charging circuit is connected with the ground end controller and the vehicle end charging circuit, and the vehicle end controller is connected with the vehicle end charging circuit and the ground end controller;
the AC-DC conversion circuit of the vehicle-end charging circuit is provided with two control switches which are respectively connected with two rectifier diodes connected with the same output end of the vehicle-end charging circuit in parallel, and the control switches are connected with a vehicle-end controller;
the ground controller controls the ground charging circuit to be disconnected with the power supply when receiving a shutdown signal sent by the vehicle-end controller, detects the voltage at two ends of a bus capacitor in the ground charging circuit, and sends a shutdown signal to the vehicle-end controller when the voltage at two ends of the bus capacitor is smaller than a preset voltage.
Still another preferred embodiment of the present invention also provides a computer-readable storage medium on which a computer program is stored, the computer program, when executed by a processor, implementing the steps of the control method for wireless charging of a vehicle as described above.
Compared with the prior art, the control method, the vehicle-end controller and the wireless charging system for vehicle wireless charging provided by the embodiment of the invention at least have the following beneficial effects:
the vehicle-end controller can acquire the preset charging protection parameters of the power battery in the wireless charging process of the vehicle, acquire the actual charging parameters of the vehicle-mounted charging circuit in real time, compare the actual charging parameters with the preset charging protection parameters to obtain a comparison result, if the charging protection is determined to be needed according to the comparison result, namely, the system reliability can be influenced by the fact that the charging is continuously carried out at present, when the charged battery is damaged, two control switches are controlled to be switched to a closed state, at the moment, two rectifier diodes connected with the same output end of the vehicle-end charging circuit are both short-circuited, so that the current entering the AC-DC conversion circuit cannot be transmitted to the power battery, the charging voltage and the charging current of the power battery are zero, and the power battery is prevented from being damaged. Compared with the existing method that when the vehicle-end controller determines that charging protection is needed, the ground-end controller needs to send a charging disconnection signal to the ground-end controller through communication connection, and then the ground-end controller interrupts charging, the method does not depend on a control mode connected with communication, can quickly disconnect the power battery from a charging circuit when charging protection is needed, is beneficial to avoiding damage to the power battery caused by out-of-control voltage and current output to the power battery due to communication delay, and improves the reliability of the whole system.
Drawings
FIG. 1 is a flow chart of a control method according to the present invention;
FIG. 2 is a schematic diagram of a vehicle end charging circuit of the present invention;
FIG. 3 is a second flowchart of the control method of the present invention;
FIG. 4 is a third flowchart illustrating a control method according to the present invention;
FIG. 5 is a schematic structural diagram of the end-of-vehicle controller of the present invention;
fig. 6 is a schematic structural diagram of a wireless charging system according to the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help the full understanding of the embodiments of the present invention. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.
Referring to fig. 1, a preferred embodiment of the present invention provides a control method for wireless charging of a vehicle, which is applied to a vehicle-end controller, wherein two control switches are arranged on an AC-DC conversion circuit of a vehicle-end charging circuit connected to the vehicle-end controller, and the two control switches are respectively connected in parallel with two rectifier diodes connected to a same output terminal of the vehicle-end charging circuit, and the control method includes:
step S101, acquiring actual charging parameters of a vehicle-end charging circuit and preset charging protection parameters of a power battery;
step S102, comparing the actual charging parameter with a preset charging protection parameter to obtain a comparison result;
and step S103, controlling the two control switches to be switched to a closed state when the charging protection is determined to be needed according to the comparison result.
Referring to fig. 2, in the embodiment of the present invention, the vehicle-end charging circuit 201 connected to the vehicle-end controller in the wireless charging control system includes an energy transmission circuit 2011 corresponding to the ground-end charging circuit 202 and an AC-DC conversion circuit 2012 connecting the energy transmission circuit 2011 and the power battery, the AC-DC conversion circuit 2012 includes two bridge arms, and each bridge arm is provided with two rectifier diodes with the same direction, namely a rectifier diode D1, a rectifier diode D2, a rectifier diode D3 and a rectifier diode D4, in a specific embodiment, the rectifier diode D1 and the rectifier diode D3 are located in the same bridge arm, the rectifier diode D2 and the rectifier diode D4 are located in the same bridge arm, and the rectifier diode D1 and the rectifier diode D2 are connected to the first output terminal of the vehicle-end charging circuit 201, the rectifier diode D3 and the rectifier diode D4 are connected to the second output terminal of the vehicle-end charging circuit 201, two output points of the energy transmission circuit 2011 are respectively located between the rectifier diode D1 and the rectifier diode D3 and between the rectifier diode D2 and the rectifier diode D4, so that the alternating current transmitted by the energy transmission circuit 2011 is converted into direct current to be charged into the power battery after passing through the AC-DC conversion circuit 2012. Specifically, in an exemplary embodiment of the invention, the control switch S5 is connected in parallel with the rectifier diode D3, the control switch S6 is connected in parallel with the rectifier diode D4, and when the control switch S5 and the control switch S6 are closed, the energy transmitted from the first end of the energy transmission circuit 2011 is returned to the second end of the energy transmission circuit 2011 along the sequence of the control switch S5 and the control switch S6, and the energy transmitted from the second end of the energy transmission circuit 2011 is returned to the first end of the energy transmission circuit 2011 along the sequence of the control switch S6 and the control switch S5.
In the embodiment of the invention, the vehicle-end controller can acquire the preset charging protection parameters of the power battery in the wireless charging process of the vehicle, acquire the actual charging parameters of the vehicle-mounted charging circuit in real time, compare the actual charging parameters with the preset charging protection parameters to obtain a comparison result, if the charging protection is determined to be required according to the comparison result, that is, the system reliability is influenced when the charging is continuously carried out, and control the two control switches to be switched to the closed state when the charged battery is damaged, at the moment, two rectifier diodes connected with the same output end of the vehicle-end charging circuit are both short-circuited, so that the current entering the AC-DC conversion circuit cannot be transmitted to the power battery, the charging voltage and the charging current of the power battery are zero, and the power battery is prevented from being damaged. Compared with the existing method that when the vehicle-end controller determines that charging protection is needed, the ground-end controller needs to send a charging disconnection signal to the ground-end controller through communication connection, and then the ground-end controller interrupts charging, the method does not depend on a control mode connected with communication, can quickly disconnect the power battery from a charging circuit when charging protection is needed, is beneficial to avoiding damage to the power battery caused by out-of-control voltage and current output to the power battery due to communication delay, and improves the reliability of the whole system.
Specifically, in the control method described above, the actual charging parameters include: actual charging voltage and/or actual charging current;
presetting the charging protection parameters comprises the following steps: presetting a charging protection voltage and a charging protection current;
and when the actual charging voltage is greater than the preset charging protection voltage and/or the actual charging current is greater than the preset charging protection current, determining that charging protection is required.
In an embodiment of the invention, the actual charging parameters include: the actual charging voltage and/or the actual charging current, the preset charging protection parameters include: a preset charge protection voltage and a preset charge protection current. When the obtained actual charging parameter is only the actual charging voltage, the preset charging protection parameter can only obtain the corresponding preset charging protection voltage, and when the actual charging voltage is greater than the preset charging protection voltage, the charging protection is determined to be needed; when the obtained actual charging parameter is only the actual charging current, the preset charging protection parameter can only obtain the corresponding preset charging protection current, and when the actual charging current is larger than the preset charging protection current, the charging protection is determined to be needed; when the actual charging parameter includes both the actual charging voltage and the actual charging current, the preset charging protection parameter needs to acquire the preset charging protection voltage and the preset charging protection current, and when the actual charging voltage is greater than the preset charging protection voltage and/or the actual charging current is greater than the preset charging protection current, it is determined that charging protection needs to be performed. The method for determining whether the charging protection is needed is diversified, and the power battery is prevented from being damaged from multiple aspects.
Referring to fig. 3, preferably, the control method as described above, after the step 103 of controlling the two control switches to be switched to the closed state, the control method further includes:
step S301, acquiring the current voltage and the charge allowable voltage of the power battery;
and step S302, when the current voltage is less than the charge allowable voltage, controlling the two control switches to be switched to an off state.
In the embodiment of the invention, after the two control switches are controlled to be switched to the closed state, the AC-DC conversion circuit is continuously in the short-circuit state, so that the power battery is prevented from being damaged. When the acquired current voltage of the power battery is smaller than the allowable voltage of the power battery, namely the current state of the power battery can be charged, the two control switches are controlled to be switched off at the moment, so that the AC-DC conversion circuit is switched to a normal state, and the power battery can be charged. Preferably. The charge allowable voltage is less than the preset charge protection voltage, including but not limited to the voltage of the power battery at low power level, and the normal use of the vehicle may be affected if the power battery is not charged. Optionally, the above technical solution only provides a judgment condition for controlling the two control switches to be switched to the off state, and a person skilled in the art adopts other judgment conditions, for example, when receiving an indication signal for recovering charging through a local area network or a communication connection, the two control switches are controlled to be switched to the off state, which also belongs to the protection scope of the present invention.
Referring to fig. 4, preferably, the control method as described above, further includes:
step S401, when receiving a charging completion signal, sending a shutdown signal to a ground controller, and controlling two control switches to be switched to a closed state;
step S402, when a shutdown confirmation signal sent by the ground controller is received, controlling the two control switches to switch to the off state, where the shutdown confirmation signal is sent when the ground controller detects that the voltage at the two ends of the bus capacitor is less than a preset voltage.
In the embodiment of the invention, when the vehicle-end controller receives the charging completion signal, the vehicle-end controller sends a shutdown signal to the ground-end controller, the ground-end controller can disconnect the connection between the ground-end charging circuit and the power supply according to the shutdown signal, but because the energy stored in the bus capacitor in the ground-end charging circuit cannot be actively released, after the ground-end controller controls the ground-end charging circuit to be disconnected from the power supply, the high voltage still exists in the ground-end charging circuit and can be continuously transmitted to the vehicle-end charging circuit, at the moment, the two control switches are controlled to be switched to the closed state, the vehicle-end charging circuit is short-circuited, the damage to the power battery when the high voltage is transmitted to the power battery is avoided, meanwhile, because the vehicle-end charging circuit is short-circuited, the release speed of the energy stored in the bus capacitor is accelerated, and the risk of electric shock when people, meanwhile, the problem that the starting time is long due to the fact that more energy is stored in the bus capacitor to influence restarting is avoided. When the local controller detects that the voltages at the two ends of the bus capacitor are smaller than the preset voltage, the fact that the energy stored in the bus capacitor is not enough to hurt personnel at the moment can be determined, and when the starting of ground charging is not influenced, a shutdown confirming signal is sent to the vehicle-end controller, and the vehicle-end controller controls the two control switches to be switched to a disconnected state according to the shutdown confirming signal, so that the wireless charging of the vehicle is realized again.
Referring to fig. 5, another preferred embodiment of the present invention further provides a vehicle-end controller, wherein two control switches are disposed on an AC-DC conversion circuit of a vehicle-end charging circuit connected to the vehicle-end controller, and are respectively connected in parallel to two rectifier diodes connected to a same output terminal of the vehicle-end charging circuit, and the vehicle-end controller includes:
a first obtaining module 501, configured to obtain an actual charging parameter of a vehicle-end charging circuit and a preset charging protection parameter of the power battery;
a first processing module 502, configured to compare the actual charging parameter with the preset charging protection parameter to obtain a comparison result;
the second processing module 503 controls the two control switches to switch to the closed state when it is determined that the charging protection is required according to the comparison result.
Preferably, the vehicle end controller as described above, further comprises:
the second acquisition module is used for acquiring the current voltage and the charging allowable voltage of the power battery;
and the third processing module is used for controlling the two control switches to be switched to an off state when the current voltage is less than the charging allowable voltage.
Preferably, the vehicle end controller as described above, further comprises:
the fourth processing module is used for sending a shutdown signal to the ground controller and controlling the two control switches to be switched to a closed state when receiving the charging completion signal;
and the fifth processing module is used for controlling the two control switches to be switched to a disconnected state when a shutdown confirmation signal sent by the ground controller is received, wherein the shutdown confirmation signal is sent when the ground controller detects that the voltage at the two ends of the bus capacitor is smaller than a preset voltage.
The embodiment of the vehicle end controller of the invention is the vehicle end controller corresponding to the embodiment of the vehicle end wireless charging control method applied to the vehicle end controller, and all implementation means in the embodiment of the method are applicable to the embodiment of the vehicle end controller, and the same technical effect can be achieved.
Still another preferred embodiment of the present invention also provides a vehicle including: the vehicle end controller as described above.
The embodiment of the invention provides a vehicle comprising the vehicle-end controller, so that the vehicle-end controller executes the steps when the vehicle is charged wirelessly, the charging state is monitored in real time in the charging process of the vehicle, and when charging protection is found to be needed, the connection between the power battery and a charging circuit can be disconnected quickly, thereby being beneficial to avoiding the damage to the power battery caused by the out-of-control voltage and current output to the power battery due to communication delay and improving the reliability of the whole system.
Referring to fig. 2 and 6, still another preferred embodiment of the present invention also provides a vehicle wireless charging system, including: a ground controller 203, a ground charging circuit 202, a vehicle charging circuit 201, and a vehicle controller 204 as described above;
the ground charging circuit 202 is connected with the ground controller 203 and is connected with the vehicle charging circuit 201, and the vehicle controller 204 is connected with the vehicle charging circuit 201 and is connected with the ground controller 203;
two control switches are arranged on the AC-DC conversion circuit 2012 of the vehicle-end charging circuit 201, the two control switches are respectively connected with two rectifier diodes connected with the same output end of the vehicle-end charging circuit 201 in parallel, and the control switches are connected with the vehicle-end controller 204;
when receiving a shutdown signal sent by the vehicle-end controller 204, the ground-end controller 203 controls the ground-end charging circuit 202 to disconnect from the power supply, detects the voltage at two ends of a bus capacitor in the ground-end charging circuit 202, and sends a shutdown signal to the vehicle-end controller 204 when the voltage at two ends of the bus capacitor is smaller than a preset voltage.
In the embodiment of the present invention, the ground controller 203 of the vehicle wireless charging system is connected to the ground charging circuit 202 and the vehicle-end controller 204 as described above, and the vehicle-end charging circuit 201 is connected to the vehicle-end controller 204 and the ground charging circuit 202, wherein the circuit principle of the vehicle-end charging circuit 201 and the control logic of the vehicle-end controller 204 can refer to the above description, and are not repeated again. The power battery can be protected by the vehicle-end controller 204 through executing the steps of the control method, and meanwhile, the energy stored in the ground-end charging circuit 202 is quickly released when the vehicle-end controller is turned off, so that the influence on the personnel safety and the starting at the same time is avoided.
It should be noted that, the power battery mentioned herein refers to an energy receiving device connected to a vehicle-end charging circuit in the vehicle field, and when the technical solution of the present invention is applied to other technical fields, corresponding changes are made, and also belong to the protection scope of the present invention.
Still another preferred embodiment of the present invention also provides a computer-readable storage medium on which a computer program is stored, the computer program, when executed by a processor, implementing the steps of the control method for wireless charging of a vehicle as described above.
Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. A control method for wireless charging of a vehicle is applied to a vehicle-end controller, wherein two control switches are arranged on an AC-DC conversion circuit of a vehicle-end charging circuit connected with the vehicle-end controller, and the two control switches are respectively connected with two rectifier diodes connected with the same output end of the vehicle-end charging circuit in parallel, and the control method is characterized by comprising the following steps:
acquiring actual charging parameters of a vehicle-end charging circuit and preset charging protection parameters of a power battery;
comparing the actual charging parameter with the preset charging protection parameter to obtain a comparison result;
and when the charging protection is determined to be needed according to the comparison result, controlling the two control switches to be switched to a closed state.
2. The control method according to claim 1, wherein the actual charging parameter includes: actual charging voltage and/or actual charging current;
the preset charging protection parameters include: presetting a charging protection voltage and a charging protection current;
and when the actual charging voltage is greater than the preset charging protection voltage and/or the actual charging current is greater than the preset charging protection current, determining that charging protection is required.
3. The control method according to claim 1, characterized in that after the step of controlling the two control switches to be switched to the closed state, the control method further comprises:
acquiring the current voltage and the charging allowable voltage of the power battery;
and when the current voltage is less than the charging allowable voltage, controlling the two control switches to be switched to an off state.
4. The control method according to claim 1, characterized by further comprising:
when a charging completion signal is received, sending a shutdown signal to the ground controller, and controlling the two control switches to be switched to a closed state;
and when a shutdown confirmation signal sent by the ground controller is received, controlling the two control switches to be switched to a disconnected state, wherein the shutdown confirmation signal is sent when the ground controller detects that the voltage at the two ends of the bus capacitor is smaller than a preset voltage.
5. The utility model provides a car end controller, is provided with two control switches on the AC-DC converting circuit of car end charging circuit who is connected with car end controller, two control switch is parallelly connected with two rectifier diodes of connecting same output of car end charging circuit respectively, its characterized in that, car end controller includes:
the first acquisition module is used for acquiring the actual charging parameters of the vehicle-end charging circuit and the preset charging protection parameters of the power battery;
the first processing module is used for comparing the actual charging parameter with the preset charging protection parameter to obtain a comparison result;
and the second processing module is used for controlling the two control switches to be switched to a closed state when the charging protection is determined to be required according to the comparison result.
6. The vehicle end controller of claim 5, further comprising:
the second acquisition module is used for acquiring the current voltage and the charging allowable voltage of the power battery;
and the third processing module is used for controlling the two control switches to be switched to an off state when the current voltage is less than the charging allowable voltage.
7. The vehicle end controller of claim 5, further comprising:
the fourth processing module is used for sending a shutdown signal to the ground controller and controlling the two control switches to be switched to a closed state when receiving a charging completion signal;
and the fifth processing module is used for controlling the two control switches to be switched to a disconnected state when a shutdown confirmation signal sent by the ground controller is received, wherein the shutdown confirmation signal is sent when the ground controller detects that the voltage at the two ends of the bus capacitor is smaller than a preset voltage.
8. A vehicle, characterized by comprising: an end controller as claimed in any one of claims 5 to 7.
9. A wireless charging system for a vehicle, comprising: a ground controller, a ground charging circuit, a vehicle charging circuit, and the vehicle controller according to any one of claims 6 to 8;
the ground end charging circuit is connected with the ground end controller and the vehicle end charging circuit, and the vehicle end controller is connected with the vehicle end charging circuit and the ground end controller;
the AC-DC conversion circuit of the vehicle-end charging circuit is provided with two control switches, the two control switches are respectively connected with two rectifier diodes connected with the same output end of the vehicle-end charging circuit in parallel, and the control switches are connected with the vehicle-end controller;
the ground controller controls the ground charging circuit to be disconnected with a power supply when receiving a shutdown signal sent by the vehicle-end controller, detects voltages at two ends of a bus capacitor in the ground charging circuit, and sends a determined shutdown signal to the vehicle-end controller when the voltages at the two ends of the bus capacitor are smaller than a preset voltage.
10. A computer-readable storage medium, characterized in that a computer program is stored thereon, which, when being executed by a processor, carries out the steps of the method of controlling wireless charging of a vehicle according to any one of claims 1 to 4.
CN201910701733.0A 2019-07-31 2019-07-31 Vehicle wireless charging control method, vehicle-end controller and wireless charging system Pending CN112389216A (en)

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CN114179647A (en) * 2020-09-15 2022-03-15 北京新能源汽车股份有限公司 Wireless charging control method and device and vehicle

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CN114179647A (en) * 2020-09-15 2022-03-15 北京新能源汽车股份有限公司 Wireless charging control method and device and vehicle
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Application publication date: 20210223