CN114179645A - Wireless charging control method and device and vehicle - Google Patents

Wireless charging control method and device and vehicle Download PDF

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Publication number
CN114179645A
CN114179645A CN202010967297.4A CN202010967297A CN114179645A CN 114179645 A CN114179645 A CN 114179645A CN 202010967297 A CN202010967297 A CN 202010967297A CN 114179645 A CN114179645 A CN 114179645A
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China
Prior art keywords
charging
current
charging current
circuit
value
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Pending
Application number
CN202010967297.4A
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Chinese (zh)
Inventor
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 CN202010967297.4A priority Critical patent/CN114179645A/en
Publication of CN114179645A publication Critical patent/CN114179645A/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
    • 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
    • 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
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • 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
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention provides a wireless charging control method, a wireless charging control device and a vehicle, wherein the wireless charging control method comprises the following steps: acquiring a charging current predicted value of the vehicle-end charging circuit and a charging current actual value of the vehicle-end charging circuit; comparing the predicted charging current value with the actual charging current value to obtain a comparison result; and controlling the on-off states of the two control switches according to the comparison result, so that the actual value of the charging current changes along with the predicted value of the charging current. According to the scheme, the actual value of the charging current is made to follow the change of the predicted value of the charging current through the on-off states of the two control switches, so that the problem that the charging current is out of control due to communication delay to cause damage to the power battery is solved, and the reliability of the wireless charging system is improved.

Description

Wireless charging control method and device and vehicle
Technical Field
The invention relates to the technical field of wireless charging, in particular to a wireless charging control method, a wireless charging control device and a vehicle.
Background
The wireless charging technology is a non-contact power supply mode, the whole set of wireless charging system consists of a ground end, a vehicle end and a battery, and data interaction is realized through a wireless communication system. The electric energy of the power grid side is transmitted to the battery and stored through a wireless electric energy transmission technology, the ground end receives wireless communication data such as charging voltage and current of the vehicle end, the charging voltage and the charging current of the battery of the vehicle end are controlled by controlling the on-off of an active device (a switch tube) of the ground end, and closed-loop control is formed.
In the prior art, the time period for data interaction through wireless communication is long, the charging current is not ideally controlled, and once communication abnormality occurs, the charging current may be out of control for a short time, so that the reliability of the system is directly influenced.
Disclosure of Invention
The embodiment of the invention provides a wireless charging control method, a wireless charging control device and a vehicle, which are used for solving the problem that charging current cannot be quickly controlled when communication is abnormal in the wireless charging process.
In order to solve the above technical problem, an embodiment of the present invention provides the following technical solutions:
an embodiment of a first aspect of the present invention provides a wireless charging control method, which is applied to a wireless charging system, where the wireless charging system includes a ground charging circuit and a vehicle charging circuit coupled to the ground charging circuit, an AC-DC conversion circuit of the vehicle charging circuit is provided with two control switches, and the two control switches are respectively connected in parallel with two rectifier diodes connected to a same output terminal in the AC-DC conversion circuit, and the method includes:
acquiring a charging current predicted value of the vehicle-end charging circuit and a charging current actual value of the vehicle-end charging circuit;
comparing the predicted charging current value with the actual charging current value to obtain a comparison result;
and controlling the on-off states of the two control switches according to the comparison result, so that the actual value of the charging current changes along with the predicted value of the charging current.
Optionally, the controlling, according to the comparison result, the on/off states of the two control switches to make the actual value of the charging current change along with the predicted value of the charging current includes:
and when the comparison result meets a first preset condition, controlling the two control switches to be switched to a closed state.
Optionally, the method further comprises:
and when the actual value of the charging current is larger than the predicted value of the charging current, determining that the comparison result meets the first preset condition.
Optionally, the method further comprises:
after the two control switches are switched to a closed state, controlling the primary side current of the ground charging circuit to be composed of harmonic current;
and controlling the actual value of the charging current to be zero.
Optionally, the controlling, according to the comparison result, the on/off states of the two control switches to make the actual value of the charging current change along with the predicted value of the charging current further includes:
and when the comparison result meets a second preset condition, controlling the two control switches to be switched to a disconnected state.
Optionally, the method further comprises:
and when the actual value of the charging current is smaller than or equal to the predicted value of the charging current, determining that the comparison result meets the second preset condition.
Optionally, the method further comprises:
after the two control switches are switched to the off state, the primary side current of the ground charging circuit consists of fundamental wave current and harmonic wave current;
and controlling the secondary side current of the vehicle-end charging circuit to be composed of fundamental wave current and harmonic wave current.
Optionally, the method further comprises:
when a charging completion signal is received, the ground charging circuit is controlled to be disconnected from the ground power supply, and the two control switches are controlled to be closed;
and if the voltage in the ground end compensation capacitor is less than the preset voltage, controlling the two control switches to be switched to a disconnected state.
An embodiment of a second aspect of the present invention provides a wireless charging control device, applied to a wireless charging system, where the wireless charging system includes a ground charging circuit and a vehicle charging circuit coupled to the ground charging circuit, an AC-DC conversion circuit of the vehicle charging circuit is provided with two control switches, and the two control switches are respectively connected in parallel with two rectifier diodes connected to a same output terminal in the AC-DC conversion circuit, and the device includes:
the current acquisition module is used for acquiring a charging current predicted value of the vehicle-end charging circuit and a charging current actual value of the vehicle-end charging circuit;
the comparison module is used for comparing the predicted charging current value with the actual charging current value to obtain a comparison result;
and the control module is used for controlling the on-off states of the two control switches according to the comparison result so as to enable the actual value of the charging current to change along with the predicted value of the charging current.
Optionally, the control module comprises:
and the first control unit is used for controlling the two control switches to be switched to a closed state when the comparison result meets a first preset condition.
Optionally, the control module further comprises:
and the first judgment unit is used for determining that the comparison result meets the first preset condition when the actual value of the charging current is greater than the predicted value of the charging current.
Optionally, the control module further comprises:
the first current control unit is used for controlling the primary side current of the ground charging circuit to be composed of harmonic current after the two control switches are switched to the closed state; and controlling the actual value of the charging current to be adjusted to be zero.
Optionally, the control module further comprises:
and the second control unit is used for controlling the two control switches to be switched to an off state when the comparison result meets a second preset condition.
Optionally, the control module further comprises:
and the second judging unit is used for determining that the comparison result meets the second preset condition when the actual value of the charging current is less than or equal to the predicted value of the charging current.
Optionally, the control module further comprises:
the second current control unit is used for switching the two control switches to an off state, and the primary side current of the ground charging circuit consists of fundamental wave current and harmonic wave current;
and controlling the secondary side current of the vehicle-end charging circuit to be composed of fundamental wave current and harmonic wave current.
Optionally, the apparatus further comprises:
the shutdown module is used for controlling the ground charging circuit to be disconnected from the ground power supply and controlling the two control switches to be closed when receiving a charging completion signal;
and if the voltage in the ground end compensation capacitor is less than the preset voltage, controlling the two control switches to be switched to a disconnected state, and finishing shutdown.
An embodiment of the third aspect of the invention provides a vehicle including the wireless charging control device.
The invention has the beneficial effects that:
the invention provides a wireless charging control method, which is applied to a wireless charging system, wherein the wireless charging system comprises a ground charging circuit and a vehicle charging circuit coupled with the ground charging circuit, an AC-DC conversion circuit of the vehicle charging circuit is provided with two control switches, and the two control switches are respectively connected with two rectifier diodes which are connected with the same output end in the AC-DC conversion circuit in parallel, and the method comprises the following steps: acquiring a charging current predicted value of the vehicle-end charging circuit and a charging current actual value of the vehicle-end charging circuit; comparing the predicted charging current value with the actual charging current value to obtain a comparison result; and controlling the on-off states of the two control switches according to the comparison result, so that the actual value of the charging current changes along with the predicted value of the charging current. Compared with the prior art that the actual value of the charging current is controlled to change along with the predicted value of the charging current in a wireless communication control mode, the actual value of the charging current is made to change along with the predicted value of the charging current through the on-off states of two control switches, the mode is favorable for avoiding the problem that the charging current is out of control due to communication delay, so that damage to a power battery is caused, and the reliability of a wireless charging system is improved.
Drawings
Fig. 1 is a schematic flowchart illustrating a wireless charging control method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a wireless charging system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a wireless charging control device according to an embodiment of the present invention.
Description of reference numerals:
1-a ground charging circuit; 2-a vehicle end charging circuit; 201-energy transfer circuit; 202-AC-DC conversion circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The invention provides a wireless charging control method, a wireless charging control device and a vehicle, aiming at the problem that in the wireless charging process, when communication is abnormal, charging current cannot be quickly controlled.
As shown in fig. 1, an embodiment of a first aspect of the present invention provides a wireless charging control method applied to a wireless charging system, where the wireless charging system includes a ground charging circuit and a vehicle charging circuit coupled to the ground charging circuit, an AC-DC conversion circuit of the vehicle charging circuit is provided with two control switches, and the two control switches are respectively connected in parallel with two rectifier diodes connected to a same output terminal in the AC-DC conversion circuit, and the method includes:
step 101: acquiring a charging current predicted value of the vehicle-end charging circuit and a charging current actual value of the vehicle-end charging circuit;
step 102: comparing the predicted charging current value with the actual charging current value to obtain a comparison result;
step 103: and controlling the on-off states of the two control switches according to the comparison result, so that the actual value of the charging current changes along with the predicted value of the charging current.
It should be noted that, as shown in fig. 2, in the embodiment of the present invention, the wireless charging system includes a ground charging circuit 1 and a vehicle charging circuit 2 coupled to the ground charging circuit 1, where the energy transmission direction is from the ground charging circuit 1 to the vehicle charging circuit 2, the vehicle charging circuit 2 includes an energy transmission circuit 201 and an AC-DC conversion circuit 202, an input end of the AC-DC conversion circuit 202 is connected to the energy transmission circuit 201, and an output end of the AC-DC conversion circuit 202 is connected to a power battery of the vehicle. The AC-DC conversion circuit 202 includes two bridge arms, each of which is provided with two serially connected rectifier diodes, wherein the first bridge arm is provided with a first rectifier diode D1 and a second rectifier diode D2, and the second bridge arm is provided with a third rectifier diode D3 and a fourth rectifier diode D4. The cathode of the second rectifying diode D2 is connected to the anode of the first rectifying diode D1, and the cathode of the first rectifying diode D1 is connected to the first output terminal. The cathode of the fourth rectifying diode D4 is connected with the anode of a third rectifying diode D3, and the cathode of the third rectifying diode D3 is connected with the first output terminal; the anode of the first rectifying diode D1 is further connected to the first output terminal of the energy transmission circuit 201; the cathode of the fourth rectifying diode D1 is further connected to the second output terminal of the energy transmission circuit 201; the anode of the second rectifier diode D2 and the anode of the fourth rectifier diode D4 are both connected to the second output terminal. Two control switches are respectively connected in parallel with two rectifier diodes connected with the same output end in the AC-DC conversion circuit 202, in this embodiment, the control switch S5 is connected in parallel with the rectifier diode D1, and the control switch S6 is connected in parallel with the rectifier diode D3.
In the prior art, when the vehicle-end controller detects the actual value I of the charging current of the power battery charged in the AC-DC conversion circuit 202 of the vehicle-end charging circuit 2batAnd the predicted value I of the charging currentrefWhen the corresponding relation of the charging current I is changed, the charging current I needs to be transmitted to a ground controller through wireless communication, and then the ground charging circuit 1 is controlled to be disconnected or connected with a ground power supply, so that the actual value of the charging current I is realizedbatFollowing the charging current prediction value IrefAnd (4) changing. In the embodiment of the invention, two control switches S5 and S6 which are respectively connected with two rectifier diodes connected with the same output end in the AC-DC conversion circuit 202 in parallel are arranged, so that when the actual value I of the charging current isbatAnd the predicted value I of the charging currentrefWhen the corresponding relation of the charging current I and the charging current I is changed, the actual value of the charging current I is enabled to be changed through the on-off states of the two control switchesbatFollowing the charging current prediction value IrefThe change is favorable for avoiding the problem that the power battery is damaged due to the fact that charging current is out of control caused by communication delay, and the reliability of the wireless charging system is improved.
The controlling the on-off states of the two control switches according to the comparison result to make the actual value of the charging current change along with the predicted value of the charging current includes:
and when the comparison result meets a first preset condition, controlling the two control switches to be switched to a closed state.
The method further comprises the following steps:
and when the actual value of the charging current is larger than the predicted value of the charging current, determining that the comparison result meets the first preset condition.
The method further comprises the following steps:
after the two control switches are switched to a closed state, controlling the primary side current of the ground charging circuit to be composed of harmonic current;
and controlling the actual value of the charging current to be adjusted to be zero.
It should be noted that when the actual value of the charging current I isbatGreater than the predicted value of charging current IrefTime, the charging current predicted value IrefDecreases to zero, at which time the two control switches S5 and S6 are controlled to switch to a closed state, the AC-DC conversion circuit 202 is short-circuited, and the bridge arm voltage U of the end-of-vehicle charging circuit 2 is reduced to zeroab_rmsThe value of the primary side current iLf1 of the ground charging circuit 1 is zero, and the secondary side current iLf2 of the vehicle charging circuit 2 is composed of harmonic current, so the actual value I of the charging current charged into the power batterybatAnd zero, the damage to the power battery can be avoided in such a way.
The controlling the on-off states of the two control switches according to the comparison result to make the actual value of the charging current change along with the predicted value of the charging current further comprises:
and when the comparison result meets a second preset condition, controlling the two control switches to be switched to a disconnected state.
The method further comprises the following steps:
and when the actual value of the charging current is smaller than or equal to the predicted value of the charging current, determining that the comparison result meets the second preset condition.
The method further comprises the following steps:
after the two control switches are switched to the off state, the primary side current of the ground charging circuit consists of fundamental wave current and harmonic wave current;
and controlling the secondary side current of the vehicle-end charging circuit to be composed of fundamental wave current and harmonic wave current.
It should be noted that when the actual value of the charging current I isbatLess than or equal to the charging current predicted value IrefWhen the power battery is in the acceptable charging state, namely the power battery is in the acceptable charging state, the two control switches S5 and S6 are controlled to be switched to the off state, the primary side current iLf1 of the ground charging circuit 1 is composed of fundamental wave current and harmonic wave current, the secondary side current iLf2 of the vehicle-side charging circuit 2 is also composed of fundamental wave current and harmonic wave current, at the moment, the energy of the ground charging circuit 1 is transmitted to the vehicle-side charging circuit 2, and the power battery can receive the charging systemAnd (6) charging.
The method further comprises the following steps:
when a charging completion signal is received, the ground charging circuit is controlled to be disconnected from the ground power supply, and the two control switches are controlled to be closed;
and if the voltage in the ground end compensation capacitor is less than the preset voltage, controlling the two control switches to be switched to a disconnected state, and finishing shutdown.
It should be noted that when the vehicle-end charging circuit finishes charging, a charging completion signal is sent to the ground-end charging circuit to control the ground-end charging circuit to disconnect from the ground-end power supply, but the energy stored in the compensation capacitor in the ground-end charging circuit cannot be actively released, so that after the ground-end controller controls the ground-end charging circuit to disconnect from the ground-end power supply, the compensation capacitor of the ground-end charging circuit still has high voltage, and at the moment, the two control switches are controlled to be switched to a closed state to short-circuit the vehicle-end charging circuit, thereby avoiding the damage to the power battery when the high voltage is transmitted to the power battery, and simultaneously, because the vehicle-end charging circuit is short-circuited, the release speed of the energy stored in the compensation capacitor is accelerated, thereby being beneficial to avoiding the risk of electric shock when a person touches, and simultaneously, avoiding the influence on restarting caused by more energy stored in the bus capacitor, the starting time is longer.
If the voltage in the ground terminal compensation capacitor is smaller than the preset voltage, the preset voltage does not cause human body damage, the voltage for charging and restarting cannot be influenced, the control switch is controlled to be switched to the off state, and the wireless charging of the vehicle is conveniently realized again.
As shown in fig. 3, an embodiment of a second aspect of the present invention provides a wireless charging control device applied to a wireless charging system, where the wireless charging system includes a ground charging circuit and a vehicle charging circuit coupled to the ground charging circuit, an AC-DC conversion circuit of the vehicle charging circuit is provided with two control switches, and the two control switches are respectively connected in parallel with two rectifier diodes connected to a same output terminal in the AC-DC conversion circuit, and the device includes:
a current obtaining module 301, configured to obtain a predicted charging current value of the vehicle-end charging circuit and an actual charging current value of the vehicle-end charging circuit;
a comparison module 302, configured to compare the predicted charging current value with the actual charging current value, and obtain a comparison result;
and the control module 303 is configured to control the on-off states of the two control switches according to the comparison result, so that the actual value of the charging current changes along with the predicted value of the charging current.
The control module 303 includes:
and the first control unit is used for controlling the two control switches to be switched to a closed state when the comparison result meets a first preset condition.
The control module 303 further comprises:
and the first judgment unit is used for determining that the comparison result meets the first preset condition when the actual value of the charging current is greater than the predicted value of the charging current.
The control module 303 further comprises:
the first current control unit is used for controlling the primary side current of the ground charging circuit to be composed of harmonic current after the two control switches are switched to the closed state;
and controlling the actual value of the charging current to be adjusted to be zero.
The control module 303 further comprises:
and the second control unit is used for controlling the two control switches to be switched to an off state when the comparison result meets a second preset condition.
The control module 303 further comprises:
and the second judging unit is used for determining that the comparison result meets the second preset condition when the actual value of the charging current is less than or equal to the predicted value of the charging current.
The control module 303 further comprises:
the second current control unit is used for switching the two control switches to an off state, and the primary side current of the ground charging circuit consists of fundamental wave current and harmonic wave current;
and controlling the secondary side current of the vehicle-end charging circuit to be composed of fundamental wave current and harmonic wave current.
The device further comprises:
the shutdown module is used for controlling the ground charging circuit to be disconnected from the ground power supply and controlling the two control switches to be closed when receiving a charging completion signal;
and if the voltage in the ground end compensation capacitor is less than the preset voltage, controlling the two control switches to be switched to a disconnected state, and finishing shutdown.
An embodiment of the third aspect of the invention provides a vehicle including the wireless charging control device.
It should be noted that, in the vehicle provided with the wireless charging control device, during the wireless charging process, the actual value of the charging current is changed along with the predicted value of the charging current by the on-off states of the two control switches, which is beneficial to avoiding the problem of damage to the power battery caused by the out-of-control charging current due to communication delay and improving the reliability of the wireless charging system.
While the preferred embodiments of the present invention have been described, 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 following claims.

Claims (11)

1. A wireless charging control method is applied to a wireless charging system, and is characterized in that the wireless charging system comprises a ground charging circuit and a vehicle charging circuit coupled with the ground charging circuit, two control switches are arranged on an AC-DC conversion circuit of the vehicle charging circuit, and the two control switches are respectively connected with two rectifier diodes which are connected with the same output end in the AC-DC conversion circuit in parallel, and the method comprises the following steps:
acquiring a charging current predicted value of the vehicle-end charging circuit and a charging current actual value of the vehicle-end charging circuit;
comparing the predicted charging current value with the actual charging current value to obtain a comparison result;
and controlling the on-off states of the two control switches according to the comparison result, so that the actual value of the charging current changes along with the predicted value of the charging current.
2. The wireless charging control method according to claim 1, wherein the controlling the on/off states of the two control switches according to the comparison result to change the actual charging current value according to the predicted charging current value includes:
and when the comparison result meets a first preset condition, controlling the two control switches to be switched to a closed state.
3. The wireless charging control method according to claim 2, further comprising:
and when the actual value of the charging current is larger than the predicted value of the charging current, determining that the comparison result meets the first preset condition.
4. The wireless charging control method according to claim 2, further comprising:
after the two control switches are switched to a closed state, controlling the primary side current of the ground charging circuit to be composed of harmonic current;
and controlling the actual value of the charging current to be adjusted to be zero.
5. The wireless charging control method according to claim 1, wherein the controlling the on/off states of the two control switches according to the comparison result to change the actual charging current value according to the predicted charging current value further comprises:
and when the comparison result meets a second preset condition, controlling the two control switches to be switched to a disconnected state.
6. The wireless charging control method according to claim 5, further comprising:
and when the actual value of the charging current is smaller than or equal to the predicted value of the charging current, determining that the comparison result meets the second preset condition.
7. The wireless charging control method according to claim 5, further comprising:
after the two control switches are switched to the off state, the primary side current of the ground charging circuit consists of fundamental wave current and harmonic wave current;
and controlling the secondary side current of the vehicle-end charging circuit to be composed of fundamental wave current and harmonic wave current.
8. The wireless charging control method according to claim 1, further comprising:
when a charging completion signal is received, the ground charging circuit is controlled to be disconnected from the ground power supply, and the two control switches are controlled to be closed;
and if the voltage in the ground end compensation capacitor is less than the preset voltage, controlling the two control switches to be switched to a disconnected state, and finishing shutdown.
9. The utility model provides a wireless charging control device, is applied to wireless charging system, its characterized in that, wireless charging system includes ground charging circuit, and with the car end charging circuit of ground charging circuit coupling, be provided with two control switches on the AC-DC converting circuit of car end charging circuit, two control switches respectively with in the AC-DC converting circuit connect two rectifier diodes of same output end in parallel, the device includes:
the current acquisition module is used for acquiring a charging current predicted value of the vehicle-end charging circuit and a charging current actual value of the vehicle-end charging circuit;
the comparison module is used for comparing the predicted charging current value with the actual charging current value to obtain a comparison result;
and the control module is used for controlling the on-off states of the two control switches according to the comparison result so as to enable the actual value of the charging current to change along with the predicted value of the charging current.
10. The wireless charging control device according to claim 9, further comprising:
the shutdown module is used for controlling the ground charging circuit to be disconnected from the ground power supply and controlling the two control switches to be closed when receiving a charging completion signal;
and if the voltage in the ground end compensation capacitor is less than the preset voltage, controlling the two control switches to be switched to a disconnected state, and finishing shutdown.
11. A vehicle characterized by comprising the wireless charging control apparatus according to any one of claims 9 to 10.
CN202010967297.4A 2020-09-15 2020-09-15 Wireless charging control method and device and vehicle Pending CN114179645A (en)

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WO2016058214A1 (en) * 2014-10-14 2016-04-21 江苏嘉钰新能源技术有限公司 Monitoring and protection apparatus and method for electric field coupling wireless charging system
CN106340925A (en) * 2016-09-29 2017-01-18 广东欧珀移动通信有限公司 Charging control method, apparatus and terminal
CN109591646A (en) * 2018-12-19 2019-04-09 国网江苏省电力有限公司 Vehicle-mounted end parallel connection protection circuit suitable for LCL/LCC topology wireless charging system
CN109842193A (en) * 2019-03-04 2019-06-04 中南大学 A kind of super capacitor charging method and its charging unit based on serials control
CN210792822U (en) * 2019-10-30 2020-06-19 北京新能源汽车股份有限公司 Electric automobile end charging circuit and car

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016058214A1 (en) * 2014-10-14 2016-04-21 江苏嘉钰新能源技术有限公司 Monitoring and protection apparatus and method for electric field coupling wireless charging system
CN106340925A (en) * 2016-09-29 2017-01-18 广东欧珀移动通信有限公司 Charging control method, apparatus and terminal
CN109591646A (en) * 2018-12-19 2019-04-09 国网江苏省电力有限公司 Vehicle-mounted end parallel connection protection circuit suitable for LCL/LCC topology wireless charging system
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