CN110525247B - Charging circuit, method and equipment - Google Patents

Charging circuit, method and equipment Download PDF

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Publication number
CN110525247B
CN110525247B CN201910800115.1A CN201910800115A CN110525247B CN 110525247 B CN110525247 B CN 110525247B CN 201910800115 A CN201910800115 A CN 201910800115A CN 110525247 B CN110525247 B CN 110525247B
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Prior art keywords
charging
circuit
wireless charging
wired
switch
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CN201910800115.1A
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Chinese (zh)
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CN110525247A (en
Inventor
高摇光
胡超
王德勇
宋广红
彭敏
梁明
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Ztev Corp
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Ztev Corp
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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
    • B60L53/10—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
    • B60L53/14—Conductive 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
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • 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
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • 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
    • B60L2210/30—AC to DC converters
    • 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
    • B60L2210/40—DC 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
    • Y02T90/14—Plug-in electric vehicles

Abstract

The invention belongs to the field of electric automobile charging, and discloses a charging circuit, a method and equipment. The charging circuit includes: the charging system comprises a vehicle-mounted charging circuit, a wireless charging circuit, a wired charging switch, a wireless charging switch and a control module; on-vehicle charging circuit is connected with wired charging switch, and wireless charging circuit is connected with wireless charging switch, wherein: the control module is used for receiving the wired charging signal, closing the wired charging switch, disconnecting the wireless charging switch and controlling the vehicle-mounted charging circuit to charge; the control module is also used for receiving the wireless charging signal, closing the wireless charging switch, disconnecting the wired charging switch and controlling the wireless charging circuit to charge. According to the invention, the wired charging switch and the wireless charging switch are controlled to form the function of controllable switching between wireless charging and wired charging, so that the multiplexing of the wireless charging circuit and the vehicle-mounted charging circuit is realized, and the technical problems of high vehicle cost, large vehicle-mounted part volume and heavy weight caused by the conventional slow charging mode are solved.

Description

Charging circuit, method and equipment
Technical Field
The invention relates to the field of electric automobile charging, in particular to a charging circuit, a charging method and charging equipment.
Background
The new energy electric automobile has been paid high attention from various circles in recent years, has a leap growth in various application fields, and is still in the initial development stage. Under the current situation that the battery endurance mileage is low, the charging difficulty is still the biggest problem puzzling the development of the new energy electric automobile, and the popularization speed of the new energy electric automobile is hindered. However, the construction of the charging infrastructure needs a time period, reasonable planning, a large amount of capital investment, manpower investment, post-maintenance and the like, and it is difficult to construct and complete the charging infrastructure in a short time, so that the use requirements of all users can be met.
The mainstream three charging modes in the current market are as follows: direct current charging, wireless charging, and alternating current charging. The wireless charging and the alternating current charging belong to a slow charging mode, and the charging power is generally 3.3kW, 6.6kW and 11 kW. For the automobile enterprises, the above two slow charging modes require a wireless charging device and an on-board charging device to be configured in the vehicle, so that the vehicle can meet the compatibility of the two charging modes, which will result in the increase of the cost of the vehicle and the increase of the volume and weight of the on-board components.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a charging circuit, a charging method and charging equipment, and aims to solve the technical problems of high vehicle cost, large volume of vehicle-mounted components and heavy weight caused by a slow charging mode in the prior art.
To achieve the above object, the present invention provides a charging circuit, including: the charging system comprises a vehicle-mounted charging circuit, a wireless charging circuit, a wired charging switch, a wireless charging switch and a control module; on-vehicle charging circuit with wired charging switch connects, wireless charging circuit with wireless charging switch connects, wherein:
the control module is used for receiving a wired charging signal, closing a wired charging switch, disconnecting a wireless charging switch and controlling the vehicle-mounted charging circuit to charge;
the control module is also used for receiving a wireless charging signal, closing the wireless charging switch, disconnecting the wired charging switch and controlling the wireless charging circuit to charge.
Preferably, the vehicle-mounted charging circuit comprises a power factor correction circuit, a full-bridge inverter circuit and an ac-dc conversion circuit, wherein:
the power factor correction circuit is used for receiving an alternating current input voltage and converting the alternating current input voltage into a direct current voltage; the power factor correction circuit is also used for improving the power factor and improving the efficiency of the charging process;
the full-bridge inverter circuit is used for converting the direct-current voltage into alternating-current voltage;
the alternating current-direct current conversion circuit is used for converting the alternating current voltage into direct current output voltage.
Preferably, the on-vehicle charging circuit further comprises a charging gun inlet and a transformer, wherein:
when a charging gun is connected to the charging gun connecting port, the control module receives a wired charging signal;
the secondary coil of the transformer is connected with the wireless charging switch, and the secondary coil of the transformer is also connected with the wired charging switch; the transformer primary coil is connected with the alternating current-direct current conversion circuit, and the transformer is used for realizing electrical isolation.
Preferably, the wireless charging circuit includes a secondary coil and a secondary resonance compensation network, wherein:
the secondary side resonance compensation network is used for compensating harmonic and/or reactive power consumption of the transformer and providing resonance operation of the transformer.
Preferably, the control module includes a WIFI connection unit, the WIFI connection unit is used for communication between the wireless charging circuits, and the WIFI connection unit is further used for receiving wireless charging signals.
In addition, in order to achieve the above object, the present invention further provides a charging method, including:
the control module judges whether a wired charging signal is received or not, and closes a wired charging switch and opens a wireless charging switch when the wired charging signal is received, so as to control the vehicle-mounted charging circuit to charge;
when the wired charging signal is not received, the control module judges whether a wireless charging signal is received or not;
when the wireless charging signal is received, the wireless charging switch is closed, the wired charging switch is disconnected, and the wireless charging circuit is controlled to be charged.
Preferably, the control module determines whether a wired charging signal is received, closes the wired charging switch when the wired charging signal is received, disconnects the wireless charging switch, and controls the vehicle-mounted charging circuit to perform charging, and further includes:
and when the vehicle-mounted charging circuit finishes charging or breaks down, the wired charging switch is disconnected, and the charging is finished.
Preferably, after the step of determining whether the wired charging signal is received by the control module when the wired charging signal is not received, the method further includes:
and the control module enters a standby state without receiving the wireless charging signal.
Preferably, after the step of closing a wireless charging switch and opening a wired charging switch to control the wireless charging circuit to charge when the wireless charging signal is received, the method further includes:
and when the wireless charging circuit finishes charging or breaks down, the wireless charging switch is disconnected, and the charging is finished.
In addition, to achieve the above object, the present invention also provides a charging device, which includes the charging circuit as described above, or which applies the charging method as described above.
According to the technical scheme, the charging circuit is formed by arranging the vehicle-mounted charging circuit, the wireless charging circuit, the wired charging switch, the wireless charging switch and the control module. On-vehicle charging circuit with wired charging switch connects, wireless charging circuit with wireless charging switch connects, wherein: the control module is used for receiving a wired charging signal, closing a wired charging switch, disconnecting a wireless charging switch and controlling the vehicle-mounted charging circuit to charge; the control module is also used for receiving a wireless charging signal, closing the wireless charging switch, disconnecting the wired charging switch and controlling the wireless charging circuit to charge. According to the technical scheme, the wired charging switch and the wireless charging switch are controlled to form the function of controllable switching between wireless charging and wired charging, multiplexing between the wireless charging and a vehicle-mounted charging circuit is achieved, and the technical problems of high vehicle cost, large vehicle-mounted part size and heavy weight caused by the conventional slow charging mode are solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a functional block diagram of a charging circuit according to a first embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a charging circuit according to a first embodiment of the present invention;
FIG. 3 is a circuit diagram of a second embodiment of a charging circuit according to the present invention;
FIG. 4 is a schematic flow chart illustrating a charging method according to a first embodiment of the present invention;
fig. 5 is a flowchart illustrating a charging method according to a second embodiment of the present invention.
The reference numbers illustrate:
Figure BDA0002180961140000041
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should be considered to be absent and not within the protection scope of the present invention.
The invention provides a charging circuit.
Referring to fig. 1, fig. 1 is a functional block diagram of a charging circuit according to a first embodiment of the present invention.
As shown in fig. 1, in the embodiment of the present invention, the charging circuit includes a vehicle-mounted charging circuit 100, a wireless charging circuit 200, a wired charging switch 300, a wireless charging switch 400, and a control module 500; the vehicle-mounted charging circuit 100 is connected to the wired charging switch 300, and the wireless charging circuit 200 is connected to the wireless charging switch 400, wherein:
the control module 500 is configured to receive a wired charging signal, close the wired charging switch 300, open the wireless charging switch 400, and control the vehicle-mounted charging circuit 100 to charge. In this embodiment, the control module 500 controls the wired charging switch 300 to be closed in response to a wired charging signal input by a user, and at this time, the vehicle is charged through the vehicle-mounted charging circuit 100.
The control module 500 is further configured to receive a wireless charging signal, close the wireless charging switch 400, and open the wired charging switch 300, so as to control the wireless charging circuit 200 to charge. In this embodiment, the control module 500 controls the wireless charging switch 400 to be closed in response to the wireless charging signal input by the user, and at this time, the vehicle is charged through the wireless charging circuit 200.
It should be noted that the vehicle-mounted charging circuit 100 and the wireless charging circuit 200 may share one control module 500, and the control module 500 may also be separately configured as two control modules. When the vehicle-mounted charging circuit 100 and the wireless charging circuit 200 share one control module, the control module 500 comprises a power factor correction circuit, a full-bridge inverter circuit, an ac-dc converter circuit, a wired charging switch 300, and a wireless charging switch 400. When the charging circuit is provided with two independent control modules, one control module control component comprises a power factor correction circuit, a full-bridge inverter circuit, an alternating current-direct current conversion circuit, a wired charging switch 300 and a wireless charging switch 400, and the other control module control component is an alternating current-direct current conversion circuit. If a shared control module is adopted, the control module is only provided with a WIFI connection unit, and if two independent control modules are adopted, the hardware cost of the control module is not increased.
It is easy to understand that the wired charging switch 300 and the wireless charging switch 400 in the charging circuit can be two independent controllable switches, and can also be a single-pole double-throw controllable switch.
In practical implementation, a standard interface may be additionally provided for the interface between the wireless charging switch 400 and the wireless charging circuit 200, that is, the wireless charging function module may be a component of the vehicle. When the user does not select the wireless charging function, the cost of the vehicle-mounted charging circuit 100 which is standard for the vehicle is not substantially affected. When the customer selects the wireless charging function, compared with the conventional installation of the vehicle end equipment with complete wireless charging, the circuit part of the wireless charging vehicle end can be saved, and the cost of the wireless charging equipment is reduced.
According to the technical scheme, the charging circuit is formed by arranging the vehicle-mounted charging circuit 100, the wireless charging circuit 200, the wired charging switch 300, the wireless charging switch 400 and the control module 500. The vehicle-mounted charging circuit 100 is connected to the wired charging switch 300, and the wireless charging circuit 200 is connected to the wireless charging switch 400, wherein: the control module 500 is configured to receive a wired charging signal, close the wired charging switch 300, open the wireless charging switch 400, and control the vehicle-mounted charging circuit 100 to perform charging; the control module 500 is further configured to receive a wireless charging signal, close the wireless charging switch 400, and open the wired charging switch 300, so as to control the wireless charging circuit 200 to charge. According to the technical scheme, the wired charging switch 300 and the wireless charging switch 400 are controlled to form the function of controllable switching between wireless charging and wired charging, multiplexing between a wireless charging circuit and a vehicle-mounted charging circuit is achieved, and the technical problems of high vehicle cost, large vehicle-mounted part size and heavy weight caused by the existing slow charging mode are solved.
Further, referring to fig. 1 to 2, the vehicle-mounted charging circuit 100 includes a power factor correction circuit, a full-bridge inverter circuit, and an ac-dc conversion circuit, wherein:
the power factor correction circuit is used for receiving an alternating current input voltage and converting the alternating current input voltage into a direct current voltage; the power factor correction circuit is also used for improving the power factor and improving the efficiency of the charging process;
the full-bridge inverter circuit is used for converting the direct-current voltage into alternating-current voltage;
the alternating current-direct current conversion circuit is used for converting the alternating current voltage into direct current output voltage.
In this embodiment, referring to fig. 1 to 2, the power factor correction circuit may include a first N-channel MOS transistor Q1 and a second N-channel MOS transistor Q2, wherein a source of the first N-channel MOS transistor Q1 is connected to a drain of the second N-channel MOS transistor Q2;
the full-bridge inverter circuit may include a third N-channel MOS transistor Q3, a fourth N-channel MOS transistor Q4, a fifth N-channel MOS transistor Q5, and a sixth N-channel MOS transistor Q6, wherein a source of the third N-channel MOS transistor Q3 is connected to a drain of the fourth N-channel MOS transistor Q4; the drain electrode of the third N-channel MOS tube Q3 is connected with the drain electrode of the fifth N-channel MOS tube Q5; the source electrode of the fifth N-channel MOS tube Q5 is connected with the drain electrode of the sixth N-channel MOS tube Q6; a source of the sixth N-channel MOS transistor Q6 is connected to a source of the fourth N-channel MOS transistor Q4, a source of the third N-channel MOS transistor Q3 is connected to the wired charging switch K1, and a drain of the sixth N-channel MOS transistor Q6 is connected to the wired charging switch K1;
the ac-dc converter circuit may include a seventh N-channel MOS transistor Q7 and an eighth N-channel MOS transistor Q8, and a drain of the seventh N-channel MOS transistor Q7 is connected to a source of the eighth N-channel MOS transistor Q8.
As will be readily appreciated, the power factor correction circuit is configured to receive an ac input voltage and convert the ac input voltage to a dc voltage; the power factor correction circuit is also used for improving the power factor and improving the efficiency of the charging process; the full-bridge inverter circuit is widely applied to high-power occasions, realizes the electrical isolation between input and output, converts the direct-current voltage into alternating-current voltage and outputs the alternating-current voltage to the transformer; the alternating current-direct current conversion circuit is used for converting alternating current voltage into direct current voltage and is used for vehicle charging.
Further, the vehicle-mounted charging circuit 100 further includes a charging gun inlet IN and a transformer T, wherein:
when a charging gun is connected to the charging gun connection port IN, the control module 500 receives a wired charging signal;
the transformer T secondary side coil is connected with the wireless charging switch K2, and the transformer T secondary side coil is also connected with the wired charging switch K1; and the primary coil of the transformer T is connected with the alternating current-direct current conversion circuit, and the transformer T is used for realizing electrical isolation.
IN this embodiment, referring to fig. 1 to 2, the vehicle-mounted charging circuit 100 may include a charging gun inlet IN, a first inductor L1, a second inductor L2, a first diode D1, a second diode D2, a first capacitor C1, a second capacitor C2, a third capacitor C3, a transformer T, and a power supply, wherein:
the first end of the charging gun access port IN is connected with the first end of the first inductor C1, the second end of the first inductor C1 is connected with the power factor correction circuit, the second end of the charging gun access port IN is connected with the power factor correction circuit, the second end of the first diode D1 is connected with the first end of the second diode D2, the first end of the first diode D1 is connected with the power factor correction circuit, the second end of the second diode D2 is connected with the power factor correction circuit, the first end of the first diode D1 is connected with the first end of the first capacitor C1, the second end of the second diode D2 is connected with the second end of the first capacitor C1, the first end of the first capacitor C1 is connected with the full-bridge inverter circuit, and the second end of the first capacitor C1 is connected with the full-bridge inverter circuit;
a first end of the second capacitor C2 is connected to the wired charging switch K1, a second end of the second capacitor C2 is connected to a first end of the second inductor L2, a second end of the second inductor L2 is connected to the secondary winding of the transformer T, a first end of the second capacitor C2 is further connected to the wireless charging switch K2, the secondary winding of the transformer T is connected to the wireless charging switch K2, and the secondary winding of the transformer T is further connected to the wired charging switch K1;
the primary coil of the transformer T is connected with the alternating current-direct current conversion circuit, the first end of the third capacitor C3 is connected with the center of the transformer T, the second end of the third capacitor C3 is grounded, the positive electrode of the power supply is connected with the first end of the third capacitor C3, and the negative electrode of the power supply is grounded.
It should be noted that the transformer T may be a high-frequency transformer, and is used to form electrical isolation between the wireless charging circuit 200 and the load side, so as to effectively improve the safety of the charging circuit.
When the wireless charging function is selected, since the transformer T in the vehicle-mounted charging circuit 100 is multiplexed, the secondary coil current can be reduced by changing the turn ratio of the transformer T, and the overall efficiency of the wireless charging circuit 200 is improved.
Further, the wireless charging circuit 200 includes a secondary coil L4 and a secondary resonance compensation network, wherein:
the secondary side resonance compensation network is used for compensating harmonic and/or reactive power consumption of the transformer T and providing resonance operation of the transformer T.
In this embodiment, referring to fig. 1 to 2, the secondary side resonance compensation network may include a fourth capacitor C4, a fifth capacitor C5, and a third inductor L3, a second end of the third inductor L3 is connected to the wireless charging switch K2, a first end of the third inductor L3 is connected to a second end of the fourth capacitor C4, a first end of the fourth capacitor C4 is connected to the secondary side coil L4, a second end of the secondary side coil L4 is connected to the fifth capacitor C5, a first end of the fifth capacitor C5 is connected to the first end of the third inductor L3, and a second end of the fifth capacitor C5 is connected to the wireless charging switch K2.
It should be noted that two ends of the wireless charging switch K2 are connected to the secondary coil L4 and the secondary resonance compensation network of the wireless charging circuit 200, and the secondary resonance compensation network and the full-bridge inverter circuit of the vehicle-mounted charging circuit 100 form a resonance compensation network of the wireless charging circuit 200. Multiplexing between wireless charging circuit 200 and on-vehicle charging circuit 100 is realized, when electing the wireless function of charging, because wireless charging circuit 200 partial circuit and on-vehicle charging circuit 100 share, reach the beneficial effect of practicing thrift the cost, reducing part weight, volume, promote wireless charging security.
Further, referring to fig. 3, fig. 3 is a schematic circuit structure diagram of a second embodiment of the charging circuit according to the present invention;
in the embodiment of the present invention, the resonance compensation network of the wireless charging circuit 200 is simplified, referring to fig. 2 to 3, the resonance compensation network of the wireless charging circuit 200 in fig. 3 retains the fourth capacitor C4 and the secondary winding L4, and the fifth capacitor C5 and the third inductor L3 are removed, when the wireless charging mode is adopted, the resonance compensation network of the wireless charging circuit 200 is shared with the resonance compensation network of the vehicle-mounted charging circuit 100. The circuit structure of the present embodiment simplifies the resonant compensation network of the wireless charging circuit 200, but the requirement for the resonant compensation network parameter design is higher, and the vehicle-mounted charging circuit 100 may be required to change the original resonant compensation network parameter.
Further, the control module 500 includes a WIFI connection unit, the WIFI connection unit is used for communication between the wireless charging circuits 200, and the WIFI connection unit is further used for receiving a wireless charging signal.
In this embodiment, the vehicle-mounted charging circuit 100 and the wireless charging circuit 200 may share one control module 500, and the control module 500 may also be separately configured as two control modules. When the vehicle-mounted charging circuit 100 and the wireless charging circuit 200 share one control module, the control module 500 includes a power factor correction circuit, a full-bridge inverter circuit, an ac-dc converter circuit, a wired charging switch K1, and a wireless charging switch K2. When the charging circuit is provided with two independent control modules, one control module control component comprises a power factor correction circuit, a full-bridge inverter circuit, an alternating current-direct current conversion circuit, a wired charging switch K1 and a wireless charging switch K2, and the other control module control component is an alternating current-direct current conversion circuit. If a shared control module is adopted, the control module is only provided with a WIFI connection unit, and if two independent control modules are adopted, the hardware cost of the control module is not increased. The WIFI connection unit is used for communication between the primary side and the secondary side in the wireless charging circuit 200, and the WIFI connection unit is further used for receiving a wireless charging signal.
According to the technical scheme, the charging circuit is formed by arranging the vehicle-mounted charging circuit 100, the wireless charging circuit 200, the wired charging switch 300, the wireless charging switch 400 and the control module 500. Wherein: the control module 500 is configured to receive a wired charging signal, close the wired charging switch 300, open the wireless charging switch 400, and control the vehicle-mounted charging circuit 100 to perform charging; the control module 500 is further configured to receive a wireless charging signal, close the wireless charging switch 400, open the wired charging switch 300, and control the wireless charging circuit 200 to charge. According to the technical scheme, the wireless charging and wired charging controllable switching function is formed by controlling the wired charging switch K1 and the wireless charging switch K2, two ends of the wireless charging switch K2 are connected with the secondary coil L4 and the secondary resonance compensation network of the wireless charging circuit 200, the secondary resonance compensation network and the full-bridge inverter circuit of the vehicle-mounted charging circuit 100 form the resonance compensation network of the wireless charging circuit 200 comprehensively, multiplexing between the wireless charging circuit 200 and the vehicle-mounted charging circuit 100 is achieved, when the wireless charging function is selected, partial circuits of the wireless charging circuit 200 are shared with the vehicle-mounted charging circuit 100, the beneficial effects of saving cost, reducing weight and size of components and improving wireless charging safety are achieved, and the technical problems that the vehicle cost is high, the vehicle-mounted components are large in size and heavy in the existing slow charging mode are solved.
To achieve the above object, an embodiment of the present invention further provides a charging method, and referring to fig. 4, fig. 4 is a schematic flow chart of a first embodiment of the charging method according to the present invention.
In this embodiment, the charging method includes the following steps:
step S10: the control module judges whether a wired charging signal is received or not, and closes the wired charging switch and disconnects the wireless charging switch when the wired charging signal is received, so that the vehicle-mounted charging circuit is controlled to be charged.
It should be noted that, the control module starts to detect whether a wired charging signal is received, and when the charging gun access port IN is accessed by the charging gun, the control module receives the wired charging signal. And when the wired charging signal is received, controlling to close the wired charging switch and disconnect the wireless charging switch, and then starting charging by the vehicle-mounted charging circuit.
Step S20: and when the wired charging signal is not received, the control module judges whether a wireless charging signal is received.
It should be noted that, the control module is started to detect whether a wired charging signal is received, and when the charging gun access port IN is not accessed by the charging gun, that is, the control module does not receive the wired charging signal, the control module determines whether a wireless charging signal is received.
Step S30: when the wireless charging signal is received, the wireless charging switch is closed, the wired charging switch is disconnected, and the wireless charging circuit is controlled to be charged.
It should be noted that, the control module determines whether a wireless charging signal is received, and when the wireless charging signal is received, controls to close the wireless charging switch and disconnect the wired charging switch, and at this time, the wireless charging circuit performs charging.
In the embodiment, whether a wired charging signal is received or not is judged through a control module, a wired charging switch is closed when the wired charging signal is received, a wireless charging switch is disconnected, and the vehicle-mounted charging circuit is controlled to be charged; when the wired charging signal is not received, the control module judges whether a wireless charging signal is received or not; when the wireless charging signal is received, the wireless charging switch is closed, the wired charging switch is disconnected, and the wireless charging circuit is controlled to be charged. This embodiment forms the wireless function that charges, the controllable switching of wired charging through wired charging switch and wireless charging switch, realizes multiplexing between wireless charging circuit and the on-vehicle charging circuit, reaches saving cost, reduction part weight, volume, promotes the wireless beneficial effect of charging security, has solved the current technical problem that the charging mode leads to vehicle with high costs, on-vehicle part is bulky and weight is heavy slowly to filling.
Referring to fig. 5, fig. 5 is a flowchart illustrating a charging method according to a second embodiment of the present invention.
Based on the first embodiment, after step S10, the charging method of this embodiment further includes:
and S101, when the vehicle-mounted charging circuit finishes charging or breaks down, the wired charging switch is disconnected, and charging is finished.
It should be noted that, when receiving the wired charging signal, the control module closes the wired charging switch to control the vehicle-mounted charging circuit to charge, and when the vehicle-mounted charging circuit completes charging, the control module opens the wired charging switch to finish charging; or the vehicle-mounted charging circuit breaks down in the charging process, the wired charging switch is disconnected, the charging is finished, and fault detection and troubleshooting are carried out.
Based on the first embodiment, after step S20, the charging method of this embodiment further includes:
in step S201, the control module enters a standby state without receiving the wireless charging signal.
It should be noted that, when the control module does not receive the wired charging signal, it determines whether a wireless charging signal is received, and the control module determines that the wireless charging signal is not received, that is, no charging signal is input at this time, and the control module does not enter a charging state, and enters a standby state to wait for the charging signal to be input.
Based on the first embodiment, after step S30, the charging method of this embodiment further includes:
and S301, when the wireless charging circuit finishes charging or breaks down, the wireless charging switch is disconnected, and charging is finished.
It should be noted that, when receiving the wireless charging signal, the control module closes the wireless charging switch to control the wireless charging circuit to charge, and when the wireless charging circuit completes charging, the wireless charging switch is opened to end charging; or the wireless charging circuit breaks down in the charging process, the wireless charging switch is disconnected, the charging is finished, and fault detection and troubleshooting are carried out.
In the embodiment, whether a wired charging signal is received or not is judged through a control module, a wired charging switch is closed when the wired charging signal is received, a wireless charging switch is disconnected, and the vehicle-mounted charging circuit is controlled to be charged; when the vehicle-mounted charging circuit finishes charging or breaks down, the wired charging switch is disconnected, and the charging is finished; when the wired charging signal is not received, the control module judges whether a wireless charging signal is received or not; the control module enters a standby state without receiving the wireless charging signal; when the wireless charging signal is received, a wireless charging switch is closed, a wired charging switch is disconnected, and the wireless charging circuit is controlled to be charged; and when the wireless charging circuit finishes charging or breaks down, the wireless charging switch is disconnected, and the charging is finished. This embodiment forms the wireless function that charges, the controllable switching of wired charging through wired charging switch and wireless charging switch, realizes multiplexing between wireless charging circuit and the on-vehicle charging circuit, reaches saving cost, reduction part weight, volume, promotes the wireless beneficial effect of charging security, has solved the current technical problem that the charging mode leads to vehicle with high costs, on-vehicle part is bulky and weight is heavy slowly to filling.
To achieve the above object, the present invention also proposes a charging device, which includes the charging circuit as described above, or which applies the charging method as described above. The specific structure of the charging circuit refers to the above-mentioned embodiments, and the specific steps of the charging method refer to the above-mentioned embodiments, and since the charging device adopts all the technical solutions of all the above-mentioned embodiments, at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments are achieved, and no further description is given here.
Further, it is to be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A charging circuit, comprising: the charging system comprises a vehicle-mounted charging circuit, a wireless charging circuit, a wired charging switch, a wireless charging switch and a control module; on-vehicle charging circuit with wired charging switch connects, wireless charging circuit with wireless charging switch connects, wherein:
the control module is used for receiving a wired charging signal, closing a wired charging switch, disconnecting a wireless charging switch and controlling the vehicle-mounted charging circuit to charge;
the control module is also used for receiving a wireless charging signal, closing the wireless charging switch, disconnecting the wired charging switch and controlling the wireless charging circuit to charge;
wherein, wireless charging switch both ends are connected wireless charging circuit's secondary coil and secondary resonance compensation network, and secondary resonance compensation network synthesizes the resonance compensation network who constitutes wireless charging circuit with the resonance compensation network among the on-vehicle charging circuit, and the resonance compensation network among this on-vehicle charging circuit includes: the first end of second electric capacity with wired charging switch connects, the second end of second electric capacity with the first end of second inductance is connected, the second end of second inductance with the secondary winding of transformer is connected, the first end of second electric capacity still with wireless charging switch connects, the secondary winding of transformer still with wired charging switch connects, wherein, when selecting wireless charging function, realizes multiplexing between wireless charging and the on-vehicle charging circuit, practices thrift the circuit of wireless charging vehicle end, reduces wireless charging equipment cost.
2. The charging circuit of claim 1, wherein the vehicle charging circuit comprises a power factor correction circuit, a full-bridge inverter circuit, and an ac-dc converter circuit, wherein:
the power factor correction circuit is used for receiving an alternating current input voltage and converting the alternating current input voltage into a direct current voltage; the power factor correction circuit is also used for improving the power factor and improving the efficiency of the charging process;
the full-bridge inverter circuit is used for converting the direct-current voltage into alternating-current voltage;
the alternating current-direct current conversion circuit is used for converting the alternating current voltage into direct current output voltage.
3. The charging circuit of claim 2, wherein the onboard charging circuit further comprises a charging gun inlet and a transformer, wherein:
when a charging gun is connected to the charging gun connecting port, the control module receives a wired charging signal;
the transformer primary coil is connected with the alternating current-direct current conversion circuit, and the transformer is used for realizing electrical isolation.
4. The charging circuit of claim 1, wherein the wireless charging circuit comprises a secondary coil and a secondary resonant compensation network, wherein:
the secondary side resonance compensation network is used for compensating harmonic and/or reactive power consumption of the transformer and providing resonance operation of the transformer.
5. The charging circuit of claim 1, wherein the control module comprises a WIFI connection unit for communication between wireless charging circuits, the WIFI connection unit further for receiving a wireless charging signal.
6. A charging method, characterized in that the charging method comprises:
the control module judges whether a wired charging signal is received or not, closes a wired charging switch when the wired charging signal is received, disconnects a wireless charging switch and controls the vehicle-mounted charging circuit to charge;
when the wired charging signal is not received, the control module judges whether a wireless charging signal is received or not;
when the wireless charging signal is received, the wireless charging switch is closed, the wired charging switch is disconnected, and the wireless charging circuit is controlled to be charged;
wherein, wireless charging switch both ends are connected wireless charging circuit's secondary coil and secondary resonance compensation network, and secondary resonance compensation network synthesizes the resonance compensation network who constitutes wireless charging circuit with the resonance compensation network among the on-vehicle charging circuit, and the resonance compensation network among this on-vehicle charging circuit includes: the first end of second electric capacity with wired charging switch connects, the second end of second electric capacity with the first end of second inductance is connected, the second end of second inductance with the secondary winding of transformer is connected, the first end of second electric capacity still with wireless charging switch connects, the secondary winding of transformer still with wired charging switch connects, wherein, when selecting wireless charging function, realizes multiplexing between wireless charging and the on-vehicle charging circuit, practices thrift the circuit of wireless charging vehicle end, reduces wireless charging equipment cost.
7. The charging method according to claim 6, wherein the control module, after the steps of determining whether a wired charging signal is received, closing a wired charging switch and opening a wireless charging switch when the wired charging signal is received, and controlling the vehicle-mounted charging circuit to charge, further comprises:
and when the vehicle-mounted charging circuit finishes charging or breaks down, the wired charging switch is disconnected, and the charging is finished.
8. The charging method according to claim 6, wherein after the step of determining whether a wireless charging signal is received by the control module when the wired charging signal is not received, the method further comprises:
and the control module enters a standby state without receiving the wireless charging signal.
9. The charging method according to claim 6, wherein after the steps of closing a wireless charging switch and opening a wired charging switch to control the wireless charging circuit to perform charging when the wireless charging signal is received, the method further comprises:
and when the wireless charging circuit finishes charging or breaks down, the wireless charging switch is disconnected, and the charging is finished.
10. A charging device, characterized in that the charging device comprises a charging circuit according to any one of claims 1-5, or the charging device applies a charging method according to any one of claims 6-9.
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