WO2019128405A1 - 无线充电接收装置、无线充电方法及设备 - Google Patents

无线充电接收装置、无线充电方法及设备 Download PDF

Info

Publication number
WO2019128405A1
WO2019128405A1 PCT/CN2018/111105 CN2018111105W WO2019128405A1 WO 2019128405 A1 WO2019128405 A1 WO 2019128405A1 CN 2018111105 W CN2018111105 W CN 2018111105W WO 2019128405 A1 WO2019128405 A1 WO 2019128405A1
Authority
WO
WIPO (PCT)
Prior art keywords
coil
compensation network
compensation
charging
receiving
Prior art date
Application number
PCT/CN2018/111105
Other languages
English (en)
French (fr)
Inventor
武志贤
刘彦丁
王平华
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2019128405A1 publication Critical patent/WO2019128405A1/zh

Links

Images

Classifications

    • 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
    • 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
    • H02J7/025—

Definitions

  • the embodiments of the present invention relate to the field of wireless charging technology, and in particular, to a wireless charging receiving device, a wireless charging method, and a device.
  • the wireless charging technology refers to a technology in which a magnetic field is transmitted between a charger and a powered device, and no electrical connection is required between the two, so that the charging device can be charged.
  • Wireless charging technology has been applied in electrical equipment such as mobile phones, smart watches, electric vehicles and the like.
  • the embodiment of the present application discloses a wireless charging receiving device, a wireless charging method, and a device, which can be used to solve the problem that the existing wireless charging mode is relatively simple and cannot meet the actual charging requirement well.
  • an embodiment of the present application provides a wireless charging receiving apparatus, the apparatus comprising: at least one set of receiving coils, a compensation network group, a rectifier circuit, a switch component, and a controller.
  • the compensation network group includes n sets of compensation networks, and the n sets of compensation networks are different in circuit topology and/or device configuration parameters, and the input ends of each group of compensation networks are connected to the output ends of the receiving coils, and the output ends of each group of compensation networks are The input terminals of the rectifier circuit are connected, and n is an integer greater than one.
  • the controller is configured to control the switch assembly to conduct one or more of the n sets of compensation networks with the receive coil and the rectifier circuit to achieve selection of different charging modes.
  • the number of the at least one set of receiving coils is a group, each group includes at least one coil, and a is a positive integer.
  • a a positive integer
  • a n
  • the input of each set of compensation networks is connected to the output of a set of receive coils, and different compensation networks are connected to different receive coils.
  • the first receiving coil is included in the group a receiving coil, and the first receiving coil is connected to the first compensation network in the n groups of compensation networks.
  • the first receiving coil is a single coil, and the first end and the second end of the first receiving coil are respectively connected to the input end of the first compensation network.
  • the first receiving coil includes a first coil, a second coil, and a third coil, and the first end of the first coil and the second end of the third coil are connected to the first node, the first coil The first end of the second end and the second coil are connected to the second node, and the second end of the second coil is connected to the first end of the third coil to the third node, and the first node, the second node and the third node respectively Connected to the input of the first compensation network.
  • the first receiving coil includes a first coil, a second coil, and a third coil, and the first end of the first coil, the first end of the second coil, and the first end of the third coil are connected to The same node, the second end of the first coil, the second end of the second coil, and the second end of the third coil are respectively connected to the input end of the first compensation network.
  • the embodiment of the present application provides a plurality of structures such as a single coil and a multi-coil.
  • a suitable coil structure can be selected according to actual needs.
  • the number of rectifier circuits is group b, and b is a positive integer.
  • b n
  • the output of each set of compensation networks is connected to the input of a set of rectifier circuits, and different compensation networks are connected to different rectifier circuits.
  • the apparatus further includes a DC voltage conversion circuit, the input of the DC voltage conversion circuit being coupled to the output of the rectifier circuit.
  • the output voltage is accurately controlled at the receiving end by providing a DC voltage conversion circuit at the receiving end.
  • the second compensation network is included in the n sets of compensation networks.
  • the second compensation network includes k compensation network elements that are connected in parallel with each other, and k is an integer greater than one.
  • the compensation network adopts a parallel structure composed of multiple compensation network units
  • the working requirements of the single compensation network unit can be effectively reduced, and multiple compensation network unit access can be flexibly selected to achieve effective Power reception.
  • the switch assembly includes a first switch.
  • the first switch is an electronic switch; or the first switch is a mechanical switch; or the first switch includes a parallel electronic switch and a mechanical switch.
  • an embodiment of the present application provides a wireless charging method, which is applied to a controller of a wireless charging receiving apparatus according to the above aspect, the method includes: acquiring charging demand information; determining, to be enabled, according to charging demand information The charging mode; from the n sets of compensation networks, selecting a first target compensation network corresponding to the charging mode to be activated; and controlling the switch component to conduct the first target compensation network with the receiving coil and the rectifying circuit.
  • the charging mode to be enabled is determined according to the charging requirement information, and then the compensation network access corresponding to the charging mode to be activated is selected, and the charging mode is adaptively selected according to the requirement to perform wireless charging.
  • the technical effect of charging is provided by the embodiment of the present application.
  • control switch component turns on the first target compensation network and the receiving coil and the rectifying circuit, and further includes: determining the adjusted charging mode according to the charging state; selecting and adjusting from the n groups of compensation networks a second target compensation network corresponding to the charging mode; the control switch component turns on the second target compensation network and the receiving coil and the rectifying circuit.
  • the charging mode is adjusted by combining the charging states during the charging process to achieve higher efficiency wireless charging.
  • an embodiment of the present application provides an electrical device, including: a battery, and the wireless charging receiving device according to the above aspect.
  • FIG. 1 is a schematic diagram of a wireless charging system provided by an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of a wireless charging and receiving apparatus according to an embodiment of the present application.
  • Figure 3 exemplarily shows a circuit topology diagram of several compensation networks
  • FIG. 4 is a schematic structural diagram of a wireless charging and receiving apparatus according to another embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a wireless charging and receiving apparatus according to another embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a wireless charging and receiving apparatus according to another embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a wireless charging and receiving apparatus according to another embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a wireless charging and receiving apparatus according to another embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a wireless charging and receiving apparatus according to another embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a wireless charging and receiving apparatus according to another embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a wireless charging and receiving apparatus according to another embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a wireless charging and receiving apparatus according to another embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of a wireless charging and receiving apparatus according to another embodiment of the present application.
  • FIG. 14 is a circuit topology diagram of a wireless charging and receiving apparatus according to another embodiment of the present application.
  • 15 is a circuit topology diagram of a wireless charging and receiving apparatus according to another embodiment of the present application.
  • 16 is a circuit topology diagram of a wireless charging and receiving apparatus according to another embodiment of the present application.
  • 17 is a circuit topology diagram of a wireless charging and receiving apparatus according to another embodiment of the present application.
  • FIG. 18 is a circuit topology diagram of a wireless charging and receiving apparatus according to another embodiment of the present application.
  • 20 is a circuit topology diagram of a wireless charging and receiving apparatus according to another embodiment of the present application.
  • Figure 21 shows a flow chart of a control strategy
  • 22 is a circuit topology diagram of a wireless charging and receiving apparatus according to another embodiment of the present application.
  • Figure 23 shows a flow chart of another control strategy
  • Figure 25 shows a flow chart of another control strategy
  • FIG. 26 is a schematic block diagram of a powered device provided by an embodiment of the present application.
  • FIG. 1 shows a schematic diagram of a wireless charging system provided by an embodiment of the present application.
  • the wireless charging system may include a wireless charging transmitting device 10 and a wireless charging receiving device 20.
  • the wireless charging transmitting device 10 may include a DC power supply circuit 11, an inverter circuit 12, a compensation network 13, a transmitting coil 14, and a controller 15.
  • the DC power supply circuit 11 is for supplying a DC power supply, the input end of the DC power supply circuit 11 is in communication with the power grid, and the power supply is supplied to the DC power supply circuit 11.
  • the DC power supply circuit 11 can take many forms, such as a battery, or a combination of an AC power source and a conversion circuit that converts AC power to DC power.
  • the inverter circuit 12 is for converting direct current into alternating current, for example, converting a direct current voltage supplied from the direct current power supply circuit 11 into an alternating current voltage.
  • the compensation network 13 may be referred to as a transmitter compensation network, the role of which is to compensate for the impedance of the transmitting end such that the equivalent impedance of the transmitting end exhibits the desired characteristics.
  • the transmitting coil 14 is used to transmit an alternating electromagnetic field.
  • the controller 15 may be referred to as a transmitter controller for adjusting the operating frequency of the inverter circuit 12, controlling the output voltage and current of the inverter circuit 12, and the like, for example, controlling the inverter circuit 12 to output high frequency alternating current.
  • the wireless charging receiving device 20 may include a receiving coil 21, a compensation network group 22, a rectifying circuit 23, a switch assembly 24, and a controller 25.
  • the receiving coil 21 is disposed corresponding to the transmitting coil 14 for receiving the electromagnetic field energy emitted by the transmitting coil 14, and generating an electrical signal (current or voltage) in the receiving coil 21.
  • the number of receiving coils 21 may be at least one group, and each group of receiving coils 21 includes at least one coil.
  • the compensation network group 22 may be referred to as a receiver compensation network group, and its function is to compensate the impedance of the receiving end such that the equivalent impedance of the receiving end exhibits a desired characteristic.
  • the compensation network group 22 includes multiple sets of compensation networks, and different compensation networks correspond to different charging modes.
  • the rectifier circuit 23 is for converting alternating current into direct current.
  • Switch assembly 24 is used to select any set of compensation networks to be conductive to receive coil 21 and rectifier circuit 23.
  • the controller 25 may be referred to as a receiving end controller for selecting a charging mode, switching a compensation network, controlling an output voltage and current of the rectifying circuit 23, etc., to meet the demand of the load.
  • information exchange between the controller 15 at the transmitting end and the controller 25 at the receiving end may be performed by wireless communication.
  • the wireless charging system provided by the embodiment of the present application is applicable to any scene with wireless charging requirements, such as a wireless charging scene of a terminal device such as a mobile phone or a smart watch, and a wireless charging scene of an electric vehicle.
  • FIG. 2 is a schematic structural diagram of a wireless charging and receiving device 20 according to an embodiment of the present application.
  • the wireless charging receiving device 20 may include at least one set of receiving coils 21, a compensation network group 22, a rectifying circuit 23, a switch assembly 24, and a controller 25.
  • the receiving coil 21 is for receiving electromagnetic field energy emitted from the transmitting end and generating an electrical signal (current or voltage) in the receiving coil 21.
  • the compensation network group 22 includes n sets of compensation networks, n being an integer greater than one.
  • the input of each set of compensation networks is connected to the output of the receiving coil 21, and the output of each set of compensation networks is connected to the input of the rectifier circuit 23.
  • the role of the compensation network is to compensate the impedance of the receiving end such that the equivalent impedance of the receiving end exhibits the desired characteristics.
  • the compensation network is usually composed of inductors and/or capacitors of different combinations and different connections.
  • the n sets of compensation networks are different in circuit topology and/or device configuration parameters.
  • the circuit topology is determined by the variety, combination and connection mode of the circuit components included in the circuit.
  • the variety of circuit components refers to the types of circuit components included in the compensation network, such as inductors, capacitors or other types of circuit components.
  • the combination of circuit components refers to the combination of the types and the number of circuit components in the compensation network.
  • some compensation networks include one capacitor, and some compensation networks include one capacitor and one inductor.
  • the compensation network includes 2 capacitors, and so on.
  • the connection manner of the circuit components refers to the connection manner between the various circuit components included in the compensation network, and the connection manner between the circuit components and the receiving coil 21, the rectifier circuit 23 or other components at the receiving end.
  • the device configuration parameters refer to the configuration parameters of the circuit components included in the compensation network, such as the capacity of the capacitor, the inductance of the inductor, etc. Under normal circumstances, different types of circuit components have different configuration parameters.
  • the charging mode can be divided into different dimensions such as charging time, charging degree of freedom, transmitting power, transmitting mode, and operating frequency.
  • Table 1 shows several different charging modes:
  • the charging mode can be divided into three different charging modes: fast charging mode, standard charging mode and slow charging mode; wherein the fast charging mode only needs 30-60 minutes (minutes) to be fully charged.
  • the standard charging mode needs 60-300min full, for example 60, 100, 200 or 300min
  • the slow charging mode needs 300-600min full, for example 300, 400, 500 or 600.
  • the charging mode is divided according to the charging time as an example, and the charging mode can be divided into two different charging modes: the fast charging mode and the standard charging mode; wherein the fast charging mode only needs 30-60 minutes to be fully charged, and the standard charging is performed.
  • the mode needs to be filled for more than 60 minutes. It should be noted that the above charging mode is divided into exemplary and explanatory forms, and does not limit the technical solution of the present application.
  • FIG. 3 shows a circuit topology diagram of several commonly used compensation networks.
  • the types and characteristics of each compensation network are shown in Table-2 below:
  • a controller 25 is provided for controlling the switch assembly 24 to conduct one or more of the n sets of compensation networks with the receive coil 21 and the rectifying circuit 23 to effect selection of different charging modes.
  • the selection of different charging modes can be achieved by the controller 25 controlling the switching component 24 to select to switch on different compensation networks.
  • the control switch component 24 conducts one or more sets of compensation networks corresponding to the selected charging mode with the receiving coil 21 and the rectifier circuit 23, the wireless charging process. Start. For example, when the compensation network 1 is selected for access, the control switch group 1 is closed, and the other switch groups are turned off, so that the compensation network 1 is turned on with the receiving coil 21 and the rectifying circuit 23.
  • the process for the controller 25 to select the charging mode and the compensation network will be described in detail in the following embodiments.
  • one charging mode generally corresponds to a set of compensation networks, but may also correspond to multiple sets of compensation networks, for example, when a certain charging mode corresponds to the two compensation networks of compensation networks 1 and 2, if control The controller 25 decides to select the charging mode, and the controller 25 controls the switching component 24 to simultaneously turn the compensation networks 1 and 2 into the receiving coil 21 and the rectifying circuit 23.
  • the output of the rectifier circuit 23 is connected to a load such as a battery.
  • the rectifying circuit 23 is for converting the AC electric signal received by the compensated receiving coil 21 into a DC voltage required for the load.
  • the rectifier circuit 23 may be an uncontrollable circuit composed of a diode, or may be a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) or an Insulated Gate Bipolar Transistor (Insulated Gate Bipolar Transistor).
  • MOSFET Metal-Oxide-Semiconductor Field-Effect Transistor
  • IGBT Insulated Gate Bipolar Transistor
  • the switch assembly 24 includes a plurality of switches that are controllable switches that can be opened and closed by external drive control.
  • the switch assembly 24 includes a first switch, and the first switch can be any one of the switches included in the switch assembly 24.
  • the first switch can be an electronic switch, such as a MOSFET, an IGBT, etc., and the instantaneous characteristics of the electronic switch are good.
  • the first switch can also be a mechanical switch, such as a relay, a contactor, etc., with a small conduction loss of the mechanical switch.
  • the first switch includes a parallel electronic switch and a mechanical switch to simultaneously utilize the characteristics of the electronic switch with good transient characteristics and small mechanical switch conduction loss to avoid opening or closing with a mechanical switch in the case of a large current.
  • the phenomenon of arcing occurs.
  • various factors such as the size of the load, the allowable conduction loss, and the allowable switching speed can be combined to select a suitable switch after comprehensive consideration.
  • the controller 25 has at least one of the following functions in addition to the control functions described above: a detection function, a protection function, an alarm function, a display function, and the like.
  • the detecting function is used for detecting parameters such as voltage and current in the receiving end circuit, including detecting the voltage across the receiving coil 21, the current flowing in the receiving coil 21, the voltage output by the rectifying circuit 23, the current output by the rectifying circuit 23, and the compensation. The voltage in the network, the current in the compensation network, and so on.
  • the detection function is also used to detect signals required for control and protection at the receiving end.
  • the protection function is used to protect the circuit of the receiving end, the components of the circuit, and the load, such as overvoltage protection, overcurrent protection, and overheat protection.
  • the alarm function is used to issue an alarm when an abnormality such as a short circuit, overvoltage, or overheating occurs.
  • the display function is used to display information related to the charging process, such as charging mode, battery power, charging time and other information.
  • the number of receiving coils 21 is a group, and a is a positive integer.
  • 1 ⁇ a ⁇ n there are at least two sets of compensation network inputs connected to the output of the same set of receive coils, that is, there are at least two sets of compensation networks multiplexing the same set of receive coils.
  • the output of the coil L2 is connected.
  • the input ends of the n sets of compensation networks are connected to the outputs of the same set of receiving coils, that is, the n sets of compensation networks multiplex the same set of receiving coils.
  • the input of the compensation network 1 the input of the compensation network 2 and the input of the compensation network 3 are all connected to the output of the receiving coil L1.
  • a n
  • the input of each set of compensation networks is connected to the output of a set of receive coils
  • different compensation networks are connected to different receive coils.
  • the input end of the compensation network 1 is connected to the output end of the receiving coil L1
  • the input end of the compensation network 2 is connected to the output end of the receiving coil L2
  • compensation The input of the network 3 is connected to the output of the receiving coil L3.
  • the a group of receiving coils includes a first receiving coil, and the first receiving coil is any one of a group of receiving coils.
  • the first receiving coil is connected to the first compensation network in the n groups of compensation networks, and the first compensation network is any one of the n groups of compensation networks.
  • the first receiving coil is a single coil, and the first end and the second end of the first receiving coil are respectively coupled to the input of the first compensation network.
  • both the receiving coil L1 and the receiving coil L2 are single coils.
  • the first and second ends of the receiving coil L1 are connected to the input of the compensation network 1 and to the input of the compensation network 2.
  • the first end and the second end of the receiving coil L2 are connected to the input of the compensation network 3.
  • the first receiving coil includes a first coil, a second coil, and a third coil.
  • the first end of the first coil and the second end of the third coil are connected to the first node, the second end of the first coil and the first end of the second coil are connected to the second node, and the second end of the second coil is The first end of the third coil is connected to the third node, and the first node, the second node and the third node are respectively connected to the input end of the first compensation network.
  • the first receiving coil includes a first coil L1, a second coil L2, and a third coil L3, and the three coils are connected to form a triangular structure.
  • the first node, the second node and the third node of the first receiving coil are connected to the input of the compensation network 1 and to the input of the compensation network 2.
  • the compensation network 1 and the compensation network 2 are three inputs and three outputs, and the corresponding rectifier circuit 23 is also three inputs.
  • the first receiving coil includes a first coil, a second coil, and a third coil, and the first end of the first coil, the first end of the second coil, and the first end of the third coil are connected to the same node
  • the second end of the first coil, the second end of the second coil, and the second end of the third coil are respectively connected to the input end of the first compensation network.
  • the first receiving coil includes a first coil L1, a second coil L2, and a third coil L3, and the three coils are connected to form a star structure.
  • the second end of the first coil L1, the second end of the second coil L2, and the second end of the third coil L3 are connected to the input of the compensation network 1 and to the input of the compensation network 2.
  • the compensation network 1 and the compensation network 2 are three inputs and three outputs, and the corresponding rectifier circuit 23 is also three inputs.
  • the embodiment of the present application when multiple sets of compensation networks multiplex the same set of receiving coils, it helps to simplify the circuit topology, reduce the circuit volume, and save circuit cost. Moreover, for the receiving coil 21, the embodiment of the present application provides a plurality of structures such as a single coil and a multi-coil. In practical applications, a suitable coil structure can be selected according to actual needs.
  • the number of the rectifying circuits 23 is b group, and b is a positive integer.
  • 1 ⁇ b ⁇ n there are at least two sets of compensation network outputs connected to the input of the same rectifier circuit, that is, there are at least two sets of compensation networks multiplexed with the same rectifier circuit.
  • the output of the compensation network 1 and the output of the compensation network 2 are both connected to the input of the rectifier circuit 23(a), compensating for the output of the network 3.
  • the terminal is connected to the input terminal of the rectifier circuit 23(b).
  • the output ends of the n sets of compensation networks are connected to the input ends of the same rectifier circuit, that is, the n sets of compensation networks multiplex the same rectifier circuit.
  • the output of the compensation network 1, the output of the compensation network 2, and the output of the compensation network 3 are all connected to the input of the rectifier circuit 23.
  • each set of compensation networks is connected to the input of a set of rectifier circuits, and different compensation networks are connected to different rectifier circuits.
  • the output of the compensation network 1 is connected to the input of the rectifier circuit 23(a), and the output of the compensation network 2 and the rectifier circuit 23(b) The inputs are connected and the output of the compensation network 3 is connected to the input of the rectifier circuit 23(c).
  • the wireless charging receiving device 20 further includes a DC voltage converting circuit 26.
  • the input of the DC voltage conversion circuit 26 is connected to the output of the rectifier circuit 23.
  • the DC voltage conversion circuit 26 is for controlling the output voltage to convert the DC voltage output from the rectifier circuit 23 into a DC voltage required for the load.
  • the type of the DC voltage conversion circuit 26 may be a boost type, a buck type, or a buck-boost type.
  • the boost type DC voltage converting circuit 26 may be a boost circuit
  • the step-down DC voltage converting circuit 26 may be a buck circuit.
  • the output voltage is accurately controlled at the receiving end by providing the DC voltage conversion circuit 26 at the receiving end.
  • the n compensation network includes a second compensation network, and the second compensation network is any one of the n compensation networks.
  • the second compensation network includes k compensation network elements that are connected in parallel with each other, and k is an integer greater than one.
  • the circuit topology of the k compensation network units may be the same or different, and the circuit topology of each of the compensation network units may be any one of the structures shown in FIG. 3 or other structures.
  • each of the compensation network units is correspondingly provided with a set of switches, and the controller 25 controls the number of the compensated network units to be accessed by controlling the switches to open and close. When the number of compensated network elements that are accessed is different, the received power also changes.
  • the compensation network group 22 includes two sets of compensation networks, denoted as the compensation network 1 and the compensation network 2.
  • the compensation network 1 includes k compensation network units that are connected in parallel with each other, such as compensation network unit 1-1, compensation network unit 1-2, compensation network 1-k, etc.;
  • compensation network 2 includes k pairs of two Compensation network units that are connected in parallel with each other, such as compensation network unit 2-1, compensation network unit 2-2, compensation network 2-k, and the like.
  • Each of the compensation network units is correspondingly provided with a switch group for controlling whether the compensation network unit is connected to the receiving coil 21 and the rectifier circuit 23 or not.
  • the compensation network adopts a parallel structure composed of multiple compensation network units
  • the working requirements of the single compensation network unit can be effectively reduced, and multiple compensation network unit access can be flexibly selected to achieve effective Power reception.
  • the circuit topology of the wireless charging receiving device 20 provided by the embodiment of the present application is exemplified in the following with reference to a specific example.
  • the receiving coil 21 is Ls.
  • the compensation network group 22 includes a compensation network 1 and a compensation network 2, and the compensation network 1 and the compensation network 2 are both single-capacitor structures.
  • the compensation network 1 includes a capacitor C1
  • the compensation network 2 includes a capacitor C2.
  • the switch assembly 24 includes a switch block S1 and a switch block S2.
  • the rectifier circuit 23 includes diodes D1, D2, D3, and D4.
  • the capacitor Co acts as a filter to filter out high frequency ripple in the DC voltage.
  • the wireless charging receiving device 20 supports two different charging modes, namely, charging mode 1 and charging mode 2.
  • the controller 25 controls the switch group S1 to be closed, and the control switch group S2 is turned on, the receiving coil Ls is connected in series with the capacitor C1 of the compensation network 1, and the receiving coil Ls and the capacitor C1 are generated during charging.
  • the resonant voltage converts the high frequency alternating current signal into a direct current signal through the rectifying circuit 23, and then filters it through the capacitor Co, and the filtered voltage supplies power to the load.
  • the controller 25 controls the switch group S1 to be turned on, and the control switch group S2 is closed, the receiving coil Ls is connected in parallel with the capacitor C2 of the compensation network 2, and the receiving coil Ls and the capacitor C2 are generated during charging.
  • the resonant voltage converts the high-frequency alternating current signal into a direct current signal through the rectifying circuit 23, and then filters it through the capacitor Co, and the filtered voltage supplies power to the load.
  • the receiving coil Ls When operating in the charging mode 1, the receiving coil Ls is in series resonance with the capacitor C1 of the compensation network 1, the circuit operates in the voltage source mode, and outputs the main control voltage, which is more suitable for the fast charging mode; when operating in the charging mode 2, the receiving coil Ls resonates in parallel with the capacitor C2 of the compensation network 2.
  • the circuit operates in the current source mode and outputs the main control current, which is more suitable for the standard charging mode or the slow charging mode.
  • the wireless charging receiving device 20 shown in FIGS. 14 and 15 above supports two different charging modes, and two different charging modes multiplex the same receiving coil Ls and the rectifying circuit 23, thereby effectively reducing the circuit volume and saving circuit cost.
  • the output end of the rectifier circuit 23 may also be connected to the DC voltage conversion circuit 26 to improve the voltage adaptive adjustment function of the receiving end.
  • the DC voltage conversion circuit 26 as a Boost boost circuit as an example, the inductor Lo, the diode Do, and the switch transistor Qo are used.
  • the Boost boost circuit is used to adjust the voltage output from the rectifier circuit 23, and can perform boost control.
  • FIG. 16 is only described by taking a Boost boost circuit as an example. In practical applications, a Buck step-down circuit or a Boost-Buck buck-boost circuit can be used, which can be selected according to actual needs.
  • a diode is selected in the rectifying circuit 23.
  • the switching circuit is selected in the rectifying circuit 23, including the switching tubes Q1, Q2, Q3 and Q4, which can effectively improve the voltage adaptive adjustment function of the receiving end.
  • the diode is an uncontrollable switch, so it can only function as a rectification
  • the switch tube is a controllable switch, and the timing of turning on and off the switch tubes Q1, Q2, Q3, and Q4 through the controller 25 can be
  • the voltage amplitude is adjusted during the rectification process, that is, the voltage on the output load can be controlled by the continuous on-off combination of the switches Q1, Q2, Q3 and Q4.
  • the above manner enables the circuit of the receiving end to be smaller in size than the output voltage is controlled by adding the DC voltage converting circuit 26 at the receiving end.
  • the receiving coil 21 includes the first coil L1, the second coil L2, and the third coil L3, and the three coils are connected to form a triangular structure
  • the number of capacitors included in the compensation network and the coil are The number is the same, and the rectifier circuit 23 is also changed from the two bridge arms to the three bridge arms.
  • FIG. 19 is a flowchart of a wireless charging method provided by an embodiment of the present application. This method can be applied to the controller 25 of the wireless charging receiving device 20 introduced in the above embodiment. The method can include the following steps:
  • Step 301 Acquire charging demand information.
  • the charging demand information refers to information for reflecting the user's charging demand, such as charging time, charging voltage, charging power, charging cost, and the like.
  • the controller 25 can obtain charging demand information according to the state of the wireless charging system, the state of the load (such as a battery), user interaction input, user habits, environmental conditions, and the like.
  • Step 302 Determine a charging mode to be activated according to the charging demand information.
  • the controller 25 determines a charging mode corresponding to the charging requirement information in the preset correspondence relationship as a charging mode to be activated, where the preset correspondence relationship includes a correspondence relationship between the charging demand information and the charging mode.
  • the wireless charging system supports three charging modes: fast charging, standard charging, and slow charging.
  • the preset correspondence includes the correspondence shown in Table-3 below:
  • Charging mode Charging demand information (charging time) Fast charging mode 30-60min full Standard charging mode 60-300min full Slow charging mode 300-600min full
  • the controller 25 determines that the charging mode to be activated is the fast charging mode according to the preset correspondence relationship shown in Table-3 above.
  • Step 303 From the n sets of compensation networks, select a first target compensation network corresponding to the charging mode to be enabled.
  • the compensation network corresponding to the charging mode to be activated is acquired according to the correspondence table between the charging mode and the compensation network set in advance (referred to as “first target compensation network”). .
  • step 304 the control switch component 24 turns on the first target compensation network with the receiving coil 21 and the rectifier circuit 23.
  • the controller 25 controls the switch component 24 to conduct the first target compensation network with the receiving coil 21 and the rectifier circuit 23, and the wireless charging process begins.
  • the wireless charging receiving device 20 is compatible with two output power levels of 7 kW and 100 kW.
  • the 7kW output power level corresponds to the standard charging mode
  • the 100kW output power level corresponds to the fast charging mode.
  • the wireless charging receiving device 20 includes a receiving coil Ls, a compensation network 1, a compensation network 2, a switch group S1, a switch group S2, a rectifier circuit 23, a filter capacitor Co, and a controller 25.
  • the switch group S1 controls the compensation network 1 to access
  • the switch group S2 controls the compensation network 2 to access.
  • the compensation network 1 supports wireless charging with an output power of 7 kW, which satisfies the SAE J2954 standard, and has a working vertical distance range of 10-25 cm and an operating frequency range of 81.38-90 kHz.
  • the compensation network 1 adopts a double-capacitor single-inductance structure, including capacitors C1, C2 and an inductor Lf.
  • the structure has a current source characteristic, and even if the load is short-circuited, it does not cause a fault, so the stability of the system is excellent.
  • the compensation network 2 supports wireless charging with an output power of 100 kW, a working vertical distance range of less than 10 cm, and an operating frequency range of 20-40 kHz.
  • the compensation network 2 adopts a single capacitor structure, including a capacitor C3.
  • the structure has the advantages of simple structure and small number of components, and is suitable for use in a fast charging mode.
  • Table 4 shows optional configuration parameters for the compensation network 1 and the compensation network 2:
  • the controller 25 acquires charging demand information and identifies the charging demand information. If the required charging power is less than 7 kW, the standard charging mode is selected, and the compensation network corresponding to the standard charging mode is determined to be the compensation network 1, the controller 25 controls the switch group S1 to be closed and the switch group S2 is turned off, so that the compensation network 1 and the receiving coil The Ls and the rectifier circuit 23 are turned on to start wireless charging.
  • the fast charging mode is selected, and the compensation network corresponding to the fast charging mode is determined to be the compensation network 2, the controller 25 controls the switch group S1 to be turned off and the switch group S2 is closed, so that the compensation network 2 and the receiving coil The Ls and the rectifier circuit 23 are turned on to start wireless charging. After the wireless charging begins, the system charges in the selected charging mode until the end of charging.
  • the wireless charging receiving device 20 is compatible with two charging standards of Qi and A4WP.
  • the Qi charging standard corresponds to the magnetic induction charging mode
  • the A4WP charging standard corresponds to the magnetic resonance charging mode.
  • the wireless charging receiving device 20 includes a receiving coil Ls, a compensation network 1, a compensation network 2, a switch group S1, a switch group S2, a rectifier circuit 23, a filter capacitor Co, and a controller 25.
  • the switch group S1 controls the compensation network 1 to access
  • the switch group S2 controls the compensation network 2 to access.
  • the compensation network 1 supports the wireless charging of the Qi standard, and the transmitting coil and the receiving coil are closely attached, and the operating frequency ranges from 110 to 205 kHz.
  • the compensation network 1 adopts a single capacitor structure including a capacitor C1.
  • the compensation network 2 supports the wireless charging of the A4WP standard, and the working vertical distance range is less than 2 cm, and the operating frequency is 6.78 MHz.
  • the compensation network 2 adopts a single capacitor structure including a capacitor C2.
  • Table-5 shows optional configuration parameters for the compensation network 1 and the compensation network 2:
  • the controller 25 acquires charging demand information and identifies the charging demand information. If the required charging standard is Qi, the magnetic induction charging mode is selected, and the compensation network corresponding to the magnetic induction charging mode is determined to be the compensation network 1, and the controller 25 controls the switch group S1 to be closed and the switch group S2 to be disconnected, so that the compensation network 1 and the receiving coil The Ls and the rectifier circuit 23 are turned on to start wireless charging.
  • the magnetic resonance charging mode is selected, and the compensation network corresponding to the magnetic resonance charging mode is determined to be the compensation network 2, and the controller 25 controls the switch group S1 to be turned off and the switch group S2 to be closed, so that the compensation network 2 and The receiving coil Ls and the rectifying circuit 23 are turned on to start wireless charging. After the wireless charging begins, the system charges in the selected charging mode until the end of charging.
  • the requirements for the vertical distance and alignment between the transmitting coil and the receiving coil are different, so after determining the selected charging mode, the transmitting coil and the receiving coil can be adjusted. Vertical distance, alignment, etc., to obtain a higher coupling coefficient.
  • the charging mode to be activated is determined according to the charging requirement information, and then the compensation network access corresponding to the charging mode to be activated is selected, and the appropriate charging mode is adaptively selected according to the requirement.
  • the charging mode is not changed during charging.
  • the foregoing step 304 further includes the following steps:
  • Step 305 determining an adjusted charging mode according to the state of charge
  • the state of charge may include parameters such as battery power, battery temperature, and the like.
  • the charging mode includes a standard charging mode and a fast charging mode.
  • the corresponding charging mode is the fast charging mode
  • the battery power is not between 20-80%
  • the corresponding charging mode is the standard charging mode.
  • Step 306 Select, from the n sets of compensation networks, a second target compensation network corresponding to the adjusted charging mode.
  • the controller 25 After determining the adjusted charging mode, acquires a compensation network corresponding to the adjusted charging mode according to a correspondence table between the preset charging mode and the compensation network (referred to as a “second target compensation network”). .
  • Step 307 the control switch component 24 turns on the second target compensation network with the receiving coil 21 and the rectifier circuit 23.
  • the controller 25 controls the switch component 24 to conduct the second target compensation network with the receiving coil 21 and the rectifier circuit 23, and controls the switch assembly 24 to connect the first target compensation network to the receiving coil 21 and rectify. Circuit 23 is disconnected and the wireless charging process continues.
  • the controller 25 acquires charging demand information and identifies the charging demand information. If the required charging power is less than 7 kW, the standard charging mode is selected, and the compensation network corresponding to the standard charging mode is determined to be the compensation network 1, the controller 25 controls the switch group S1 to be closed and the switch group S2 is turned off, so that the compensation network 1 and the receiving coil The Ls and the rectifier circuit 23 are turned on to start wireless charging. If the required charging power is greater than 7 kW, the battery power is judged.
  • the controller 25 controls the switch group S1 to be closed. And the switch group S2 is turned off, so that the compensation network 1 is turned on with the receiving coil Ls and the rectifying circuit 23, and wireless charging is started.
  • the controller 25 obtains the battery power in real time.
  • the fast charging mode is selected, the compensation network corresponding to the fast charging mode is determined to be the compensation network 2, and the controller 25 controls the switch group S1 to be disconnected.
  • the switch group S2 is closed, so that the compensation network 2 is electrically connected to the receiving coil Ls and the rectifying circuit 23 for wireless charging.
  • the controller 25 continues to obtain the battery power.
  • the standard charging mode is selected, and the compensation network corresponding to the standard charging mode is determined to be the compensation network 1.
  • the controller 25 controls the switch group S1 to be closed and the switch group S2 to be disconnected.
  • the compensation network 1 is turned on with the receiving coil Ls and the rectifying circuit 23, and wireless charging is continued until the battery is fully charged.
  • the charging mode is adjusted by combining the charging states during the charging process to achieve higher efficiency wireless charging.
  • an exemplary embodiment of the present application further provides a powered device 40.
  • the powered device 40 can be a mobile phone, a tablet, a wearable device, an electric car, or the like.
  • the electric device 40 includes a battery 41 and a wireless charging receiving device 20.
  • the battery 41 is a rechargeable battery such as a lithium ion battery, a lead storage battery, or the like.
  • the wireless charging receiving device 20 can be the wireless charging receiving device 20 provided by any of the above embodiments.
  • the output of the wireless charging receiving device 20 is connected to the battery 41 for charging the battery 41.
  • the battery 41 serves as a power source for the electric device 40 for supplying power to the electric device 40.
  • the battery 41 is used to power a processor, a memory, and the like of the mobile phone.
  • the battery 41 is used to supply power to components such as an engine of an electric car, an on-board computer, and the like.

Abstract

一种无线充电接收装置、无线充电方法及设备。该装置包括：至少一组接收线圈、补偿网络组、整流电路、开关组件和控制器；补偿网络组包括n组补偿网络，n组补偿网络在电路拓扑结构和/或器件配置参数上不相同，每组补偿网络的输入端和接收线圈的输出端相连，每组补偿网络的输出端和整流电路的输入端相连，n为大于1的整数；控制器用于控制开关组件将n组补偿网络中的一组或多组与接收线圈和整流电路导通，以实现不同充电模式的选择。本申请实施例提供的方案，通过在无线充电接收装置中设计多组补偿网络，使得其支持多种不同的充电模式，丰富了无线充电的方式，更好地满足实际充电需求。

Description

无线充电接收装置、无线充电方法及设备
本申请要求于2017年12月29日提交的申请号为201711485719.9、发明名称为“无线充电接收装置、无线充电方法及设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及无线充电技术(wireless charging technology)领域，特别涉及一种无线充电接收装置、无线充电方法及设备。
背景技术
无线充电技术是指充电器与用电设备之间以磁场传送电能，两者之间不需要电线连接，即可实现为用电设备进行充电的技术。无线充电技术在诸如手机、智能手表、电动汽车等用电设备中得到了应用。
目前，无线充电的方式较为单一，并不能够很好地满足实际充电需求。
发明内容
本申请实施例公开了一种无线充电接收装置、无线充电方法及设备，可用于解决现有的无线充电方式较为单一，并不能够很好地满足实际充电需求的问题。
一方面，本申请实施例提供一种无线充电接收装置，该装置包括：至少一组接收线圈、补偿网络组、整流电路、开关组件和控制器。补偿网络组包括n组补偿网络，n组补偿网络在电路拓扑结构和/或器件配置参数上不相同，每组补偿网络的输入端和接收线圈的输出端相连，每组补偿网络的输出端和整流电路的输入端相连，n为大于1的整数。控制器用于控制开关组件将n组补偿网络中的一组或多组与接收线圈和整流电路导通，以实现不同充电模式的选择。
本申请实施例提供的方案中，通过在无线充电接收装置中设计多组补偿网络，使得其支持多种不同的充电模式，丰富了无线充电的方式，更好地满足实际充电需求。
可选地，上述至少一组接收线圈的数量为a组，每组包括至少一个线圈，a为正整数。在一个可能的设计中，1≤a＜n，存在至少两组补偿网络的输入端与同一组接收线圈的输出端相连。在另一个可能的设计中，a＝n，每组补偿网络的输入端与一组接收线圈的输出端相连，且不同的补偿网络与不同的接收线圈相连。
当多组补偿网络复用同一组接收线圈时，有助于简化电路拓扑结构，减小电路体积，节省电路成本。
可选地，a组接收线圈中包括第一接收线圈，且第一接收线圈与n组补偿网络中的第一补偿网络相连。在一个可能的设计中，第一接收线圈为单线圈，第一接收线圈的第一端和第二端分别与第一补偿网络的输入端相连。在另一个可能的设计中，第一接收线圈包括第一线圈、第二线圈和第三线圈，第一线圈的第一端和第三线圈的第二端相连于第一节点，第一线圈的第二端和第二线圈的第一端相连于第二节点，第二线圈的第二端与第三线圈的第一端相连于第三节点，第一节点、第二节点和第三节点分别与第一补偿网络的输入端相 连。在又一个可能的设计中，第一接收线圈包括第一线圈、第二线圈和第三线圈，第一线圈的第一端、第二线圈的第一端和第三线圈的第一端相连于同一节点，第一线圈的第二端、第二线圈的第二端、第三线圈的第二端分别与第一补偿网络的输入端相连。
对于接收线圈，本申请实施例提供了单线圈、多线圈等多种结构，在实际应用中，可根据实际需求选择合适的线圈结构。
可选地，整流电路的数量为b组，b为正整数。在一个可能的设计中，1≤b＜n，存在至少两组补偿网络的输出端与同一整流电路的输入端相连。在另一个可能的设计中，b＝n，每组补偿网络的输出端与一组整流电路的输入端相连，且不同的补偿网络与不同的整流电路相连。
当多组补偿网络复用同一整流电路时，有助于简化电路拓扑结构，减小电路体积，节省电路成本。
在一个可能的设计中，所述装置还包括直流电压变换电路，直流电压变换电路的输入端和整流电路的输出端相连。
本申请实施例提供的方案中，通过在接收端设置直流电压变换电路，实现在接收端对输出电压进行精确控制。
在一个可能的设计中，n组补偿网络中包括第二补偿网络。第二补偿网络包括k个两两之间互相并联的补偿网络单元，k为大于1的整数。
本申请实施例提供的方案中，当补偿网络采用由多个补偿网络单元构成的并联结构时，能够有效降低单个补偿网络单元的工作要求，也可以灵活选择多个补偿网络单元接入，实现有效的功率接收。
在一个可能的设计中，开关组件中包括第一开关。第一开关为电子开关；或者，第一开关为机械开关；或者，第一开关包括并联的电子开关和机械开关。
另一方面，本申请实施例提供一种无线充电方法，该方法应用于上述方面所述的无线充电接收装置的控制器中，该方法包括：获取充电需求信息；根据充电需求信息，确定待启用的充电模式；从n组补偿网络中，选取与待启用的充电模式相对应的第一目标补偿网络；控制开关组件将第一目标补偿网络与接收线圈和整流电路导通。
本申请实施例提供的方案中，通过根据充电需求信息确定待启用的充电模式，而后选取与待启用的充电模式相对应的补偿网络接入，达到了根据需求自适应选择合适的充电模式进行无线充电的技术效果。
在一个可能的设计中，控制开关组件将第一目标补偿网络与接收线圈和整流电路导通，还包括：根据充电状态确定调整后的充电模式；从n组补偿网络中，选取与调整后的充电模式相对应的第二目标补偿网络；控制开关组件将第二目标补偿网络与接收线圈和整流电路导通。
本申请实施例提供的方案中，通过在充电过程中结合充电状态调整充电模式，以实现更高效率的无线充电。
又一方面，本申请实施例提供一种用电设备，该用电设备包括：电池，以及如上述方面所述的无线充电接收装置。
附图说明
图1是本申请一个实施例提供的无线充电系统的示意图；
图2是本申请一个实施例提供的无线充电接收装置的结构示意图；
图3示例性示出了几种补偿网络的电路拓扑图；
图4是本申请另一个实施例提供的无线充电接收装置的结构示意图；
图5是本申请另一个实施例提供的无线充电接收装置的结构示意图；
图6是本申请另一个实施例提供的无线充电接收装置的结构示意图；
图7是本申请另一个实施例提供的无线充电接收装置的结构示意图；
图8是本申请另一个实施例提供的无线充电接收装置的结构示意图；
图9是本申请另一个实施例提供的无线充电接收装置的结构示意图；
图10是本申请另一个实施例提供的无线充电接收装置的结构示意图；
图11是本申请另一个实施例提供的无线充电接收装置的结构示意图；
图12是本申请另一个实施例提供的无线充电接收装置的结构示意图；
图13是本申请另一个实施例提供的无线充电接收装置的结构示意图；
图14是本申请另一个实施例提供的无线充电接收装置的电路拓扑图；
图15是本申请另一个实施例提供的无线充电接收装置的电路拓扑图；
图16是本申请另一个实施例提供的无线充电接收装置的电路拓扑图；
图17是本申请另一个实施例提供的无线充电接收装置的电路拓扑图；
图18是本申请另一个实施例提供的无线充电接收装置的电路拓扑图；
图19是本申请一个实施例提供的无线充电方法的流程图；
图20是本申请另一个实施例提供的无线充电接收装置的电路拓扑图；
图21示出了一种控制策略的流程图；
图22是本申请另一个实施例提供的无线充电接收装置的电路拓扑图；
图23示出了另一种控制策略的流程图；
图24是本申请另一个实施例提供的无线充电方法的流程图；
图25示出了另一种控制策略的流程图；
图26是本申请一个实施例提供的用电设备的示意性框图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施方式作进一步地详细描述。
本申请实施例描述的系统架构以及业务场景是为了更加清楚地说明本申请实施例的技术方案，并不构成对本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着系统架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
请参考图1，其示出了本申请一个实施例提供的无线充电系统的示意图。该无线充电系统可以包括：无线充电发射装置10和无线充电接收装置20。
无线充电发射装置10可以包括：直流电源电路11、逆变电路12、补偿网络13、发射线圈14和控制器15。
直流电源电路11用于提供直流电源，直流电源电路11的输入端与电网连通，电网为直 流电源电路11供电。直流电源电路11的形式可以有很多，如为蓄电池，亦或是交流电源和将交流电源转换为直流电源的转换电路的组合。逆变电路12用于将直流电转换为交流电，例如将直流电源电路11提供的直流电压转换为交流电压。补偿网络13可以称为发射端补偿网路，其作用是补偿发射端的阻抗，使得发射端的等效阻抗呈现期望的特性。发射线圈14用于发射交变的电磁场。控制器15可以称为发射端控制器，用于调节逆变电路12的工作频率、控制逆变电路12的输出电压和电流等，例如控制逆变电路12输出高频的交流电。
无线充电接收装置20可以包括：接收线圈21、补偿网络组22、整流电路23、开关组件24和控制器25。
接收线圈21与发射线圈14对应设置，用于接收发射线圈14发射的电磁场能量，并在接收线圈21中产生电信号(电流或电压)。在本申请实施例中，接收线圈21的数量可以是至少一组，每组接收线圈21包括至少一个线圈。补偿网络组22可以称为接收端补偿网络组，其作用是补偿接收端的阻抗，使得接收端的等效阻抗呈现期望的特性。在本申请实施例中，补偿网络组22包括多组补偿网络，不同的补偿网络对应于不同的充电模式。整流电路23用于将交流电转换为直流电。开关组件24用于选择任意一组补偿网络与接收线圈21和整流电路23导通。控制器25可以称为接收端控制器，用于选择充电模式、切换补偿网络、控制整流电路23的输出电压和电流等，以满足负载的需求。另外，发射端的控制器15和接收端的控制器25之间可采用无线通讯的方式进行信息交互。
本申请实施例提供的无线充电系统，适用于任何具有无线充电需求的场景，如手机、智能手表等终端设备的无线充电场景、电动汽车的无线充电场景等。
请参考图2，其示出了本申请一个实施例提供的无线充电接收装置20的结构示意图。该无线充电接收装置20可以包括：至少一组接收线圈21、补偿网络组22、整流电路23、开关组件24和控制器25。
接收线圈21用于接收发射端发射的电磁场能量，并在接收线圈21中产生电信号(电流或电压)。
补偿网络组22包括n组补偿网络，n为大于1的整数。如图2中示出的补偿网络1、补偿网络2、……、补偿网络n等。每组补偿网络的输入端和接收线圈21的输出端相连，每组补偿网络的输出端和整流电路23的输入端相连。
在上文已经介绍，补偿网络的作用是补偿接收端的阻抗，使得接收端的等效阻抗呈现期望的特性。补偿网络通常由不同组合和不同连接方式的电感和/或电容构成。在本申请实施例中，n组补偿网络在电路拓扑结构和/或器件配置参数上不相同。其中，电路拓扑结构由电路中包含的电路元器件的品种、组合方式和连接方式决定。电路元器件的品种是指补偿网络中包括哪些品种的电路元器件，如可以是电感、电容或者其它品种的电路元器件。电路元器件的组合方式是指补偿网络中由哪些品种和数量的电路元器件组合而成，例如有的补偿网络中包括1个电容，有的补偿网络中包括1个电容和1个电感、有的补偿网络中包括2个电容，等等。电路元器件的连接方式是指补偿网络中包括的各个电路元器件之间的连接方式，以及电路元器件与接收线圈21、整流电路23或者接收端的其它元器件之间的连接方式。器件配置参数是指补偿网络中包含的电路元器件的配置参数，如电容的容量、电感的感量等，在通常情况下，不同型号的电路元器件具有不同的配置参数。
由于不同的补偿网络中包括的电路元器件的特征各不相同，因此不同的补偿网络可以对应于不同的充电模式。充电模式可以从充电时间、充电自由度、发射功率、发射方式、工作频率等不同维度进行划分。示例性地，结合参考如下表-1，其示出了几种不同的充电模式：
Figure PCTCN2018111105-appb-000001
表-1
以根据充电时间划分充电模式为例，可以分为快速充电模式、标准充电模式和慢速充电模式共3种不同的充电模式；其中，快速充电模式仅需30-60min(分钟)即可充满，例如仅需30、40、50或60min，标准充电模式需60-300min充满，例如需要60、100、200或300min，慢速充电模式需300-600min充满，例如需要300、400、500或600。在其它示例中，以根据充电时间划分充电模式为例，也可以分为快速充电模式和标准充电模式共2种不同的充电模式；其中，快速充电模式仅需30-60min即可充满，标准充电模式需60min以上充满。需要说明的是，上述充电模式的划分依据仅是示例性和解释性的，并不对本申请技术方案构成限定。
另外，请参考图3，其示出了几种常用的补偿网络的电路拓扑图。每种补偿网络的类型和特点如下表-2所示：
Figure PCTCN2018111105-appb-000002
表-2
控制器25，用于控制开关组件24将n组补偿网络中的一组或多组与接收线圈21和整 流电路23导通，以实现不同充电模式的选择。
由于不同的补偿网络可以支持不同的充电模式，因此通过控制器25控制开关组件24选择接通不同的补偿网络，即可实现不同充电模式的选择。在一个示例中，控制器25在选取充电模式之后，控制开关组件24将与上述被选取的充电模式相对应的一组或多组补偿网络与接收线圈21和整流电路23导通，无线充电过程开始。例如，当选择补偿网络1接入时，控制开关组1闭合，而其它开关组断开，使得补偿网络1与接收线圈21和整流电路23导通。有关控制器25选取充电模式及补偿网络的过程，将在下文实施例中进行详细说明。需要说明的是，一种充电模式通常对应于一组补偿网络，但也可以对应于多组补偿网络，例如，当某一充电模式对应于补偿网络1和2这两组补偿网络时，如果控制器25决定选取该充电模式，则控制器25控制开关组件24将补偿网络1和2同时与接收线圈21和整流电路23导通。
整流电路23的输出端与负载(如电池)相连。整流电路23用于把经过补偿后的接收线圈21接收到的交流电信号转换为负载需要的直流电压。整流电路23可以是由二极管构成的不可控电路，也可以是由金属氧化物半导体场效应管(Metal-Oxide-Semiconductor Field-Effect Transistor，MOSFET)、绝缘栅双极型晶体管(Insulated Gate Bipolar Transistor，IGBT)等可控开关构成的可控电路，还可以是由晶闸管构成的半控电路，或者是由可控开关和不可控开关组合构成的半控电路。
可选地，开关组件24中包括若干个开关，该开关是可以通过外部驱动控制打开和闭合的可控开关。示例性地，开关组件24中包括第一开关，第一开关可以是开关组件24所包括的任意一个开关。在一个示例中，第一开关可以是电子开关，如MOSFET、IGBT等，电子开关的瞬动特征好。在另一个示例中，第一开关也可以是机械开关，如继电器、接触器等，机械开关的导通损耗小。在又一个示例中，第一开关包括并联的电子开关和机械开关，以同时利用电子开关瞬动特性好和机械开关导通损耗小的特性，避免在大电流的情况下用机械开关打开或闭合时出现拉弧的现象。在实际应用中，可以结合负载的大小、允许的导通损耗、允许的开关动作速度等多种因素，综合考虑后选择适用的开关。
可选地，控制器25除了具有上述介绍的控制功能之外，还具有以下至少一项功能：检测功能、保护功能、告警功能、显示功能等。其中，检测功能用于检测接收端电路中的电压、电流等参数，包括检测接收线圈21两端的电压、接收线圈21中流过的电流、整流电路23输出的电压、整流电路23输出的电流、补偿网络中的电压、补偿网络中的电流等。可选地，检测功能还用于检测接收端控制和保护所需的信号。保护功能用于对接收端的电路、电路的元器件、负载进行保护，如过压保护、过流保护、过热保护等。告警功能用于当出现异常(如短路、过压、过热等异常)时发出告警。显示功能用于显示充电过程中的相关信息，如充电模式、电池电量、充电时间等信息。
本申请实施例提供的方案中，通过在无线充电接收装置20中设计多组补偿网络，使得其支持多种不同的充电模式，丰富了无线充电的方式，更好地满足实际充电需求。
可选地，假设接收线圈21的数量为a组，a为正整数。
在一个示例中，1≤a＜n，存在至少两组补偿网络的输入端与同一组接收线圈的输出端相连，也即存在至少两组补偿网络复用同一组接收线圈。示例性地，如图4所示，假设n＝3 且a＝2，补偿网络1的输入端和补偿网络2的输入端均与接收线圈L1的输出端相连，补偿网络3的输入端与接收线圈L2的输出端相连。
可选地，当a＝1时，n组补偿网络的输入端与同一组接收线圈的输出端相连，也即n组补偿网络复用同一组接收线圈。示例性地，如图5所示，假设n＝3且a＝1，补偿网络1的输入端、补偿网络2的输入端和补偿网络3的输入端均与接收线圈L1的输出端相连。
在另一个示例中，a＝n，每组补偿网络的输入端与一组接收线圈的输出端相连，且不同的补偿网络与不同的接收线圈相连。示例性地，如图6所示，假设n＝3且a＝3，补偿网络1的输入端与接收线圈L1的输出端相连，补偿网络2的输入端与接收线圈L2的输出端相连，补偿网络3的输入端与接收线圈L3的输出端相连。
可选地，上述a组接收线圈中包括第一接收线圈，第一接收线圈是a组接收线圈中的任意一组接收线圈。第一接收线圈与n组补偿网络中的第一补偿网络相连，第一补偿网络是n组补偿网络中的任意一个补偿网络。
在一个示例中，第一接收线圈为单线圈，第一接收线圈的第一端和第二端分别与第一补偿网络的输入端相连。例如，在图4所示的电路拓扑图中，接收线圈L1和接收线圈L2均为单线圈。接收线圈L1的第一端和第二端与补偿网络1的输入端相连，以及与补偿网络2的输入端相连。接收线圈L2的第一端和第二端与补偿网络3的输入端相连。
在另一个示例中，第一接收线圈包括第一线圈、第二线圈和第三线圈。第一线圈的第一端和第三线圈的第二端相连于第一节点，第一线圈的第二端和第二线圈的第一端相连于第二节点，第二线圈的第二端与第三线圈的第一端相连于第三节点，第一节点、第二节点和第三节点分别与第一补偿网络的输入端相连。例如，在图7所示的电路拓扑图中，第一接收线圈包括第一线圈L1、第二线圈L2和第三线圈L3，上述3个线圈相连形成三角形结构。第一接收线圈的第一节点、第二节点和第三节点与补偿网络1的输入端相连，以及与补偿网络2的输入端相连。补偿网络1和补偿网络2均为三路输入和三路输出，相应的整流电路23也为三路输入。
在又一个示例中，第一接收线圈包括第一线圈、第二线圈和第三线圈，第一线圈的第一端、第二线圈的第一端和第三线圈的第一端相连于同一节点，第一线圈的第二端、第二线圈的第二端、第三线圈的第二端分别与第一补偿网络的输入端相连。例如，在图8所示的电路拓扑图中，第一接收线圈包括第一线圈L1、第二线圈L2和第三线圈L3，上述3个线圈相连形成星形结构。第一线圈L1的第二端、第二线圈L2的第二端、第三线圈L3的第二端与补偿网络1的输入端相连，以及与补偿网络2的输入端相连。补偿网络1和补偿网络2均为三路输入和三路输出，相应的整流电路23也为三路输入。
本申请实施例提供的方案中，当多组补偿网络复用同一组接收线圈时，有助于简化电路拓扑结构，减小电路体积，节省电路成本。并且，对于接收线圈21，本申请实施例提供了单线圈、多线圈等多种结构，在实际应用中，可根据实际需求选择合适的线圈结构。
可选地，假设整流电路23的数量为b组，b为正整数。
在一个示例中，1≤b＜n，存在至少两组补偿网络的输出端与同一整流电路的输入端相连，也即存在至少两组补偿网络复用同一整流电路。示例性地，如图9所示，假设n＝3且b＝2，补偿网络1的输出端和补偿网络2的输出端均与整流电路23(a)的输入端相连，补 偿网络3的输出端与整流电路23(b)的输入端相连。
可选地，当b＝1时，n组补偿网络的输出端与同一整流电路的输入端相连，也即n组补偿网络复用同一整流电路。示例性地，如图10所示，假设n＝3且b＝1，补偿网络1的输出端、补偿网络2的输出端和补偿网络3的输出端均与整流电路23的输入端相连。
在另一个示例中，b＝n，每组补偿网络的输出端与一组整流电路的输入端相连，且不同的补偿网络与不同的整流电路相连。示例性地，如图11所示，假设n＝3且b＝3，补偿网络1的输出端与整流电路23(a)的输入端相连，补偿网络2的输出端与整流电路23(b)的输入端相连，补偿网络3的输出端与整流电路23(c)的输入端相连。
本申请实施例提供的方案中，当多组补偿网络复用同一整流电路时，有助于简化电路拓扑结构，减小电路体积，节省电路成本。
可选地，如图12所示，无线充电接收装置20还包括直流电压变换电路26。直流电压变换电路26的输入端和整流电路23的输出端相连。直流电压变换电路26用于对输出电压进行控制，将整流电路23输出的直流电压转换为负载需要的直流电压。直流电压变换电路26的类型可以是升压型，也可以是降压型，还可以是升降压型。例如，升压型的直流电压变换电路26可以是boost电路，降压型的直流电压变换电路26可以是buck电路。
在本申请实施例提供的方案中，通过在接收端设置直流电压变换电路26，实现在接收端对输出电压进行精确控制。
可选地，上述n组补偿网络中包括第二补偿网络，第二补偿网络是n组补偿网络中的任意一组补偿网络。第二补偿网络包括k个两两之间互相并联的补偿网络单元，k为大于1的整数。上述k个补偿网络单元的电路拓扑结构可以相同，也可以不同，每一个补偿网络单元的电路拓扑结构可以是图3示出的任意一种结构或者其它结构。可选地，每一个补偿网络单元相应设置有一组开关，控制器25通过控制开关打开和闭合，能够实现对接入的补偿网络单元的数量进行控制。当接入的补偿网络单元的数量不同时，接收功率也会发生变化。
示例性地，如图13所示，补偿网络组22包括两组补偿网络，记为补偿网络1和补偿网络2。其中，补偿网络1包括k个两两之间互相并联的补偿网络单元，如补偿网络单元1-1、补偿网络单元1-2、补偿网络1-k等；补偿网络2包括k个两两之间互相并联的补偿网络单元，如补偿网络单元2-1、补偿网络单元2-2、补偿网络2-k等。每一个补偿网络单元均对应设置有一个开关组，用于控制补偿网络单元与接收线圈21和整流电路23接通或者不接通。
本申请实施例提供的方案中，当补偿网络采用由多个补偿网络单元构成的并联结构时，能够有效降低单个补偿网络单元的工作要求，也可以灵活选择多个补偿网络单元接入，实现有效的功率接收。
下面，结合一个具体的例子，对本申请实施例提供的无线充电接收装置20的电路拓扑结构进行举例说明。
如图14所示，接收线圈21为Ls。补偿网络组22包括补偿网络1和补偿网络2，补偿 网络1和补偿网络2均为单电容结构，补偿网络1中包括电容C1，补偿网络2中包括电容C2。开关组件24包括开关组S1和开关组S2。整流电路23包括二极管D1、D2、D3和D4。电容Co起滤波作用，用于滤除直流电压中的高频纹波。
该无线充电接收装置20支持两种不同的充电模式，分别为充电模式1和充电模式2。
当选择充电模式1时，如图14所示，控制器25控制开关组S1闭合，且控制开关组S2打开，接收线圈Ls与补偿网络1的电容C1串联，充电时接收线圈Ls和电容C1产生串联谐振，谐振电压通过整流电路23将高频交流电信号转换为直流电信号，然后经过电容Co进行滤波，滤波后的电压给负载供电。
当选择充电模式2时，如图15所示，控制器25控制开关组S1打开，且控制开关组S2闭合，接收线圈Ls与补偿网络2的电容C2并联，充电时接收线圈Ls和电容C2产生并联谐振，谐振电压通过整流电路23将高频交流电信号转换为直流电信号，然后经过电容Co进行滤波，滤波后的电压给负载供电。
当工作于充电模式1时，接收线圈Ls与补偿网络1的电容C1串联谐振，电路工作于电压源模式，输出主要控制电压，更适用于快速充电模式；当工作于充电模式2时，接收线圈Ls与补偿网络2的电容C2并联谐振，电路工作于电流源模式，输出主要控制电流，更适用于标准充电模式或者慢速充电模式。
上述图14和15示出的无线充电接收装置20，支持两种不同的充电模式，且两种不同的充电模式复用同一接收线圈Ls和整流电路23，有效减小电路体积，节省电路成本。
可选地，如图16所示，整流电路23的输出端还可连接直流电压变换电路26，以提升接收端的电压自适应调整功能。以直流电压变换电路26为Boost升压电路为例，包括电感Lo、二极管Do和开关管Qo，该Boost升压电路用于调整整流电路23输出的电压，可以进行升压控制。上述图16仅以Boost升压电路为例进行说明，实际应用中也可以使用Buck降压电路，或者使用Boost-Buck升降压电路，这可根据实际需求进行选择。
可选地，在图14和15所示的无线充电接收装置20中，整流电路23中选用二极管。在图17所示的无线充电接收装置20中，整流电路23中选用开关管，包括开关管Q1、Q2、Q3和Q4，可有效提升接收端的电压自适应调整功能。具体来讲，二极管是不可控开关，所以只能起到整流作用，而开关管是可控开关，通过控制器25控制开关管Q1、Q2、Q3和Q4的导通和关断的时序，可以在整流过程中完成电压幅值的调节，即输出负载上的电压可以通过开关管Q1、Q2、Q3和Q4的不断通断组合进行控制。相较于通过在接收端增加直流电压变换电路26对输出电压进行控制，上述方式能够使得接收端的电路体积更小。
可选地，如图18所示，当接收线圈21包括第一线圈L1、第二线圈L2和第三线圈L3，且上述3个线圈相连形成三角形结构时，补偿网络中包括的电容数量与线圈数量相同，整流电路23也由两桥臂变为三桥臂。
请参考图19，其示出了本申请一个实施例提供的无线充电方法的流程图。该方法可应用于上述实施例介绍的无线充电接收装置20的控制器25中。该方法可以包括如下几个步骤：
步骤301，获取充电需求信息。
充电需求信息是指用于反映用户的充电需求的信息，如充电时间、充电电压、充电功 率、充电费用等信息。控制器25可以根据无线充电系统的状态、负载(如电池)的状态、用户交互输入、用户习惯、环境条件等内容获取充电需求信息。
步骤302，根据充电需求信息，确定待启用的充电模式。
可选地，控制器25将预设对应关系中与充电需求信息对应的充电模式，确定为待启用的充电模式，其中，预设对应关系包括充电需求信息与充电模式之间的对应关系。例如，无线充电系统支持快速充电、标准充电和慢速充电共3种充电模式，预设对应关系中包括如下表-3所示的对应关系：
充电模式 充电需求信息(充电时间)
快速充电模式 30-60min充满
标准充电模式 60-300min充满
慢速充电模式 300-600min充满
表-3
假设控制器25获取的充电需求信息为60分钟内将电池充满，则控制器25根据上述表-3所示的预设对应关系，确定待启用的充电模式为快速充电模式。
步骤303，从n组补偿网络中，选取与待启用的充电模式相对应的第一目标补偿网络。
控制器25确定待启用的充电模式之后，根据预先设置的充电模式与补偿网络之间的对应关系表，获取与待启用的充电模式相对应的补偿网络(记为“第一目标补偿网络”)。
步骤304，控制开关组件24将第一目标补偿网络与接收线圈21和整流电路23导通。
控制器25在选取第一目标补偿网络之后，控制开关组件24将第一目标补偿网络与接收线圈21和整流电路23导通，无线充电过程开始。
在一个示例中，以电动汽车的无线充电场景为例，如图20所示，该无线充电接收装置20兼容7kW和100kW两种输出功率等级。7kW的输出功率等级对应于标准充电模式，100kW的输出功率等级对应于快速充电模式。该无线充电接收装置20包括：接收线圈Ls、补偿网络1、补偿网络2、开关组S1、开关组S2、整流电路23、滤波电容Co和控制器25。其中，开关组S1控制补偿网络1接入，开关组S2控制补偿网络2接入。
补偿网络1支持输出功率为7kW的无线充电，满足SAE J2954标准，工作垂直距离范围为10-25cm，工作频率范围为81.38-90kHz。补偿网络1采用双电容单电感结构，包括电容C1、C2和电感Lf，该结构具有电流源特性，即使负载短路也不会引起故障，所以系统的稳定性优。
补偿网络2支持输出功率为100kW的无线充电，工作垂直距离范围小于10cm，工作频率范围为20-40kHz。补偿网络2采用单电容结构，包括电容C3，该结构具有结构简单、器件数量少的优势，适合用在快速充电模式。
示例性地，如下表-4所示，其示出了补偿网络1和补偿网络2的可选配置参数：
Figure PCTCN2018111105-appb-000003
表-4
如图21所示，其示出了相应的控制策略。控制器25获取充电需求信息，对充电需求信息进行识别。如果要求的充电功率小于7kW，则选择标准充电模式，确定与标准充电模式对应的补偿网络为补偿网络1，控制器25控制开关组S1闭合且开关组S2断开，使得补偿网络1与接收线圈Ls和整流电路23导通，开始无线充电。如果要求的充电功率大于7kW，则选择快速充电模式，确定与快速充电模式对应的补偿网络为补偿网络2，控制器25控制开关组S1断开且开关组S2闭合，使得补偿网络2与接收线圈Ls和整流电路23导通，开始无线充电。在无线充电开始之后，系统以所选择的充电模式进行充电，直至充电结束。
在另一个示例中，以手机等终端设备的无线充电场景为例，如图22所示，该无线充电接收装置20兼容Qi和A4WP两种充电标准。Qi充电标准对应于磁感应充电模式，A4WP充电标准对应于磁共振充电模式。该无线充电接收装置20包括：接收线圈Ls、补偿网络1、补偿网络2、开关组S1、开关组S2、整流电路23、滤波电容Co和控制器25。其中，开关组S1控制补偿网络1接入，开关组S2控制补偿网络2接入。
补偿网络1支持Qi标准的无线充电，发射线圈和接收线圈紧贴在一起，工作频率范围为110-205kHz。补偿网络1采用单电容结构，包括电容C1。补偿网络2支持A4WP标准的无线充电，工作垂直距离范围小于2cm，工作频率为6.78MHz。补偿网络2采用单电容结构，包括电容C2。
示例性地，如下表-5所示，其示出了补偿网络1和补偿网络2的可选配置参数：
补偿网络 类型 器件参数 开关组 工作频率 垂直距离 充电模式
1 单电容 C1＝78.2nF S1 110-205kHz 0cm 磁感应充电模式
2 单电容 C3＝3.74nF S2 6.78MHz 2cm 磁共振充电模式
表-5
如图23所示，其示出了相应的控制策略。控制器25获取充电需求信息，对充电需求信息进行识别。如果要求的充电标准为Qi，则选择磁感应充电模式，确定与磁感应充电模式对应的补偿网络为补偿网络1，控制器25控制开关组S1闭合且开关组S2断开，使得补偿网络1与接收线圈Ls和整流电路23导通，开始无线充电。如果要求的充电标准为A4WP，则选择磁共振充电模式，确定与磁共振充电模式对应的补偿网络为补偿网络2，控制器25控制开关组S1断开且开关组S2闭合，使得补偿网络2与接收线圈Ls和整流电路23导通，开始无线充电。在无线充电开始之后，系统以所选择的充电模式进行充电，直至充电结束。
需要说明的一点是，由于不同的充电模式，对发射线圈和接收线圈之间的垂直距离、对齐度等要求有所不同，因此在确定所选择的充电模式之后，可以调整发射线圈和接收线圈之间的垂直距离、对齐度等，以获取更高的耦合系数。
在本申请实施例提供的方案中，通过根据充电需求信息确定待启用的充电模式，而后选取与待启用的充电模式相对应的补偿网络接入，达到了根据需求自适应选择合适的充电模式进行无线充电的技术效果。
在上述图19所示的实施例中，在充电过程中不改变充电模式。在本申请实施例提供的另一实施例中，如图24所示，上述步骤304之后还包括如下步骤：
步骤305，根据充电状态确定调整后的充电模式；
充电状态可以包括电池电量、电池温度等参数。在一个示例中，假设充电模式包括标 准充电模式和快速充电模式，当电池电量在20-80％之间时，对应的充电模式为快速充电模式，当电池电量不在20-80％之间时，对应的充电模式为标准充电模式。
步骤306，从n组补偿网络中，选取与调整后的充电模式相对应的第二目标补偿网络；
控制器25确定调整后的充电模式之后，根据预先设置的充电模式与补偿网络之间的对应关系表，获取与调整后的充电模式相对应的补偿网络(记为“第二目标补偿网络”)。
步骤307，控制开关组件24将第二目标补偿网络与接收线圈21和整流电路23导通。
控制器25在选取第二目标补偿网络之后，控制开关组件24将第二目标补偿网络与接收线圈21和整流电路23导通，以及控制开关组件24将第一目标补偿网络与接收线圈21和整流电路23断开，无线充电过程继续。
仍然以图20所示的电动汽车的无线充电场景为例，如图25所示，其示出了相应的控制策略。控制器25获取充电需求信息，对充电需求信息进行识别。如果要求的充电功率小于7kW，则选择标准充电模式，确定与标准充电模式对应的补偿网络为补偿网络1，控制器25控制开关组S1闭合且开关组S2断开，使得补偿网络1与接收线圈Ls和整流电路23导通，开始无线充电。如果要求的充电功率大于7kW，则对电池电量进行判断，如果电池电量小于20％，则选择标准充电模式，确定与标准充电模式对应的补偿网络为补偿网络1，控制器25控制开关组S1闭合且开关组S2断开，使得补偿网络1与接收线圈Ls和整流电路23导通，开始无线充电。在充电过程中，控制器25实时获取电池电量，当电池电量达到20％时，选择快速充电模式，确定与快速充电模式对应的补偿网络为补偿网络2，控制器25控制开关组S1断开且开关组S2闭合，使得补偿网络2与接收线圈Ls和整流电路23导通，进行无线充电。控制器25继续获取电池电量，当电池电量达到80％时，选择标准充电模式，确定与标准充电模式对应的补偿网络为补偿网络1，控制器25控制开关组S1闭合且开关组S2断开，使得补偿网络1与接收线圈Ls和整流电路23导通，继续进行无线充电，直至电池电量充满。
在本申请实施例提供的方案中，通过在充电过程中结合充电状态调整充电模式，以实现更高效率的无线充电。
请参考图26，本申请一示例性实施例还提供了一种用电设备40。例如，该用电设备40可以是手机、平板电脑、可穿戴设备、电动汽车等设备。该用电设备40包括：电池41和无线充电接收装置20。电池41为可充电电池，如锂离子电池、铅蓄电池等。该无线充电接收装置20可以是上文任一实施例提供的无线充电接收装置20。无线充电接收装置20的输出端与电池41相连，用于为电池41充电。电池41作为用电设备40的电源，用于为用电设备40供电。例如，当用电设备40为手机时，电池41用于为手机的处理器、存储器等部件供电。又例如，当用电设备40为电动汽车时，电池41用于为电动汽车的发动机、车载电脑等部件供电。
以上所述的具体实施方式，对本申请实施例的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本申请实施例的具体实施方式而已，并不用于限定本申请实施例的保护范围，凡在本申请实施例的技术方案的基础之上，所做的任何修改、等同替换、改进等，均应包括在本申请实施例的保护范围之内。

Claims (11)

  1. 一种无线充电接收装置，其特征在于，所述装置包括：至少一组接收线圈、补偿网络组、整流电路、开关组件和控制器；
    所述补偿网络组包括n组补偿网络，所述n组补偿网络在电路拓扑结构或器件配置参数上至少有一种不相同，每组补偿网络的输入端和所述接收线圈的输出端相连，每组补偿网络的输出端和所述整流电路的输入端相连，所述n为大于1的整数；
    所述控制器，用于控制所述开关组件将所述n组补偿网络中的一组或多组与所述接收线圈和所述整流电路导通，以实现不同充电模式的选择。
  2. 根据权利要求1所述的装置，其特征在于，所述至少一组接收线圈的数量为a组，每组包括至少一个线圈，所述a为正整数；
    1≤a＜n，存在至少两组补偿网络的输入端与同一组接收线圈的输出端相连；
    或者，
    a＝n，每组补偿网络的输入端与一组接收线圈的输出端相连，且不同的补偿网络与不同的接收线圈相连。
  3. 根据权利要求2所述的装置，其特征在于，所述a组接收线圈中包括第一接收线圈，且所述第一接收线圈与所述n组补偿网络中的第一补偿网络相连；
    所述第一接收线圈为单线圈，所述第一接收线圈的第一端和第二端分别与所述第一补偿网络的输入端相连；
    或者，
    所述第一接收线圈包括第一线圈、第二线圈和第三线圈，所述第一线圈的第一端和所述第三线圈的第二端相连于第一节点，所述第一线圈的第二端和所述第二线圈的第一端相连于第二节点，所述第二线圈的第二端与所述第三线圈的第一端相连于第三节点，所述第一节点、所述第二节点和所述第三节点分别与所述第一补偿网络的输入端相连；
    或者，
    所述第一接收线圈包括第一线圈、第二线圈和第三线圈，所述第一线圈的第一端、所述第二线圈的第一端和所述第三线圈的第一端相连于同一节点，所述第一线圈的第二端、所述第二线圈的第二端、所述第三线圈的第二端分别与所述第一补偿网络的输入端相连。
  4. 根据权利要求1至3任一项所述的装置，其特征在于，所述整流电路的数量为b组，所述b为正整数；
    1≤b＜n，存在至少两组补偿网络的输出端与同一整流电路的输入端相连；
    或者，
    b＝n，每组补偿网络的输出端与一组整流电路的输入端相连，且不同的补偿网络与不同的整流电路相连。
  5. 根据权利要求1至4任一项所述的装置，其特征在于，所述装置还包括直流电压变换 电路，所述直流电压变换电路的输入端和所述整流电路的输出端相连。
  6. 根据权利要求1至5任一项所述的装置，其特征在于，所述n组补偿网络中包括第二补偿网络；
    所述第二补偿网络包括k个两两之间互相并联的补偿网络单元，所述k为大于1的整数。
  7. 根据权利要求1至6任一项所述的装置，其特征在于，所述开关组件中包括第一开关；
    所述第一开关为电子开关；或者，
    所述第一开关为机械开关；或者，
    所述第一开关包括并联的电子开关和机械开关。
  8. 一种无线充电方法，其特征在于，应用于如权利要求1至7任一项所述的无线充电接收装置的控制器中，所述方法包括：
    获取充电需求信息；
    根据所述充电需求信息，确定待启用的充电模式；
    从所述n组补偿网络中，选取与所述待启用的充电模式相对应的第一目标补偿网络；
    控制所述开关组件将所述第一目标补偿网络与所述接收线圈和所述整流电路导通。
  9. 根据权利要求8所述的方法，其特征在于，所述根据所述充电需求信息，确定待启用的充电模式，包括：
    将预设对应关系中与所述充电需求信息对应的充电模式，确定为所述待启用的充电模式，其中，所述预设对应关系包括所述充电需求信息与所述充电模式之间的对应关系。
  10. 根据权利要求8或9所述的方法，其特征在于，所述控制所述开关组件将所述第一目标补偿网络与所述接收线圈和所述整流电路导通之后，还包括：
    根据充电状态确定调整后的充电模式；
    从所述n组补偿网络中，选取与所述调整后的充电模式相对应的第二目标补偿网络；
    控制所述开关组件将所述第二目标补偿网络与所述接收线圈和所述整流电路导通。
  11. 一种用电设备，其特征在于，所述用电设备包括：电池，以及如权利要求1至7任一项所述的无线充电接收装置。
PCT/CN2018/111105 2017-12-29 2018-10-19 无线充电接收装置、无线充电方法及设备 WO2019128405A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201711485719.9A CN109995098B (zh) 2017-12-29 2017-12-29 无线充电接收装置、无线充电方法及设备
CN201711485719.9 2017-12-29

Publications (1)

Publication Number Publication Date
WO2019128405A1 true WO2019128405A1 (zh) 2019-07-04

Family

ID=67066414

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/111105 WO2019128405A1 (zh) 2017-12-29 2018-10-19 无线充电接收装置、无线充电方法及设备

Country Status (2)

Country Link
CN (1) CN109995098B (zh)
WO (1) WO2019128405A1 (zh)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111786470A (zh) * 2020-06-29 2020-10-16 哈尔滨工业大学 一种无人机集群无线充电电路拓扑及功率流控制方法
CN112366964A (zh) * 2020-11-09 2021-02-12 上海交通大学 一种无线输电两级ac-dc变换电路及其阻抗调节方法
CN112421972A (zh) * 2020-11-09 2021-02-26 上海交通大学 一种无线输电单桥功率电路及其阻抗调节方法
CN112421973A (zh) * 2020-11-09 2021-02-26 上海交通大学 一种无线输电两级整流电路及其阻抗调节方法
CN114365383A (zh) * 2019-11-15 2022-04-15 Oppo广东移动通信有限公司 无线接收装置、无线充电系统和无线充电方法
CN115566815A (zh) * 2022-11-22 2023-01-03 哈尔滨云充科技有限公司 一种面向agv的原边控制型lcc-s无线充电系统及控制方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110581644B (zh) * 2019-09-17 2020-12-11 广东美的制冷设备有限公司 电容补偿电路和电容补偿器
CN110912275B (zh) * 2019-10-30 2023-10-20 华为技术有限公司 一种无线充电的接收端、系统及控制方法
CN112018907B (zh) * 2020-10-14 2021-04-06 广东希荻微电子股份有限公司 一种充电模块及双模无线充电系统
CN112751428A (zh) * 2021-01-21 2021-05-04 武汉大学 工况适应型多通道互联无线供电系统及方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202405844U (zh) * 2012-01-13 2012-08-29 东南大学 一种小型电子设备无线充电装置
CN105515223A (zh) * 2016-02-01 2016-04-20 施京京 一种大功率电能的无线传输方法和电路
CN105914801A (zh) * 2016-05-17 2016-08-31 西南交通大学 一种分段切换的无线电能传输系统原边供电装置及其切换方法
CN106374578A (zh) * 2016-10-28 2017-02-01 北京航空航天大学 无线充电系统及其功率传输控制方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010284065A (ja) * 2009-06-08 2010-12-16 Nec Tokin Corp 電力・信号伝送モジュール、非接触充電モジュールならびに非接触充電および信号伝送システム
CN107097669A (zh) * 2017-05-03 2017-08-29 南京农业大学 一种单源串联多发式电动汽车无线充电系统

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202405844U (zh) * 2012-01-13 2012-08-29 东南大学 一种小型电子设备无线充电装置
CN105515223A (zh) * 2016-02-01 2016-04-20 施京京 一种大功率电能的无线传输方法和电路
CN105914801A (zh) * 2016-05-17 2016-08-31 西南交通大学 一种分段切换的无线电能传输系统原边供电装置及其切换方法
CN106374578A (zh) * 2016-10-28 2017-02-01 北京航空航天大学 无线充电系统及其功率传输控制方法

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114365383A (zh) * 2019-11-15 2022-04-15 Oppo广东移动通信有限公司 无线接收装置、无线充电系统和无线充电方法
CN111786470A (zh) * 2020-06-29 2020-10-16 哈尔滨工业大学 一种无人机集群无线充电电路拓扑及功率流控制方法
CN111786470B (zh) * 2020-06-29 2023-01-31 哈尔滨工业大学 一种无人机集群无线充电电路拓扑及功率流控制方法
CN112366964A (zh) * 2020-11-09 2021-02-12 上海交通大学 一种无线输电两级ac-dc变换电路及其阻抗调节方法
CN112421972A (zh) * 2020-11-09 2021-02-26 上海交通大学 一种无线输电单桥功率电路及其阻抗调节方法
CN112421973A (zh) * 2020-11-09 2021-02-26 上海交通大学 一种无线输电两级整流电路及其阻抗调节方法
CN115566815A (zh) * 2022-11-22 2023-01-03 哈尔滨云充科技有限公司 一种面向agv的原边控制型lcc-s无线充电系统及控制方法

Also Published As

Publication number Publication date
CN109995098A (zh) 2019-07-09
CN109995098B (zh) 2021-11-19

Similar Documents

Publication Publication Date Title
WO2019128405A1 (zh) 无线充电接收装置、无线充电方法及设备
US11731520B2 (en) Wireless power system
US11605967B2 (en) On-board charger
US11404965B2 (en) DC-DC converter, on-board charger, and electric vehicle
US20240030825A1 (en) Dc-dc converter, on-board charger, and electric vehicle
JP7419521B2 (ja) ワイヤレス充電受電器、ワイヤレス充電システム及びワイヤレス充電制御方法
CN107176040B (zh) 一种车载充电系统及汽车
CN112219333B (zh) 无线充电发射装置、发射方法及无线充电系统
US20220144093A1 (en) Electric Drive System, Powertrain, and Electric Vehicle
CN108808875A (zh) 一种适用于电池特性的恒流、恒压无线充电系统及无线充电的方法
CN116615860A (zh) 一种谐振型交流/直流变换器、电子设备及适配器
CN105406605A (zh) 一种电容耦合式无线功率传输电路及其控制方法
US20190051452A1 (en) Low voltage wireless power transfer pad
TW202015304A (zh) 用於傳輸電力至具轉換器之電力負載之裝置
US11742773B2 (en) AC-DC converter circuit system and method of designing AC-DC converter circuit system
US20150180344A1 (en) Control device and method for charging an electrical energy store
CN112003387B (zh) 一种基于改进型s/s补偿网络的恒压恒流无线充电系统
CN112583061B (zh) 车载充电系统及具有其的车辆
CN112572190B (zh) 车载充电系统及具有其的车辆
CN209381832U (zh) 充电电源模块、包含其的充电电源以及充电装置
US20220006396A1 (en) System for transferring electrical power to an electrical load
CN210608949U (zh) 变压整流电路及充电器
CN112572195B (zh) 车载充电系统及具有其的车辆
US20230387815A1 (en) Direct current to direct current converter, electronic device, and charger
CN219999237U (zh) 车载充电机电路及车辆

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18896584

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18896584

Country of ref document: EP

Kind code of ref document: A1