Vehicle charging method, vehicle charging system and vehicle

Abstract

The embodiment of the present invention discloses a vehicle charging method, a vehicle charging system and a vehicle. The integrated circuit is obtained by integrating a wired charging circuit, a multiplexing circuit and a controlled switch group, and the integrated circuit is connected to a wireless power receiving end. The charging information is obtained through a controller in the multiplexing circuit. If the charging information includes a wired charging signal, the controlled switch group is controlled so that the wired charging circuit is connected to the multiplexing circuit for wired charging. If the charging information includes a wireless charging signal, the controlled switch group is controlled so that the wireless power receiving end is connected to the multiplexing circuit for wireless charging. In this way, wired charging and wireless charging of the vehicle can be realized, while ensuring charging efficiency and charging safety, saving vehicle space, improving user experience, and being adaptable to different vehicles, with high universality.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle charging, and in particular to a vehicle charging method, a vehicle charging system and a vehicle. Background Art

[0002] With the continuous development of new energy technologies and the increasingly prominent environmental pollution and energy consumption problems of traditional fuel vehicles, new energy vehicles have gradually become the mainstream mode of daily travel in order to save energy and protect the environment. Therefore, people have put forward higher requirements for various functions of new energy vehicles, among which the charging function is more important. At present, how to design a charging system that can adapt to different vehicles (such as vehicles with different chassis heights) and can receive car space while ensuring charging efficiency and charging safety has become an urgent problem to be solved.

[0003] In the prior art, new energy vehicles are usually equipped with independent wired charging systems (On Board Charger, OBC) and wireless charging systems (Wireless Power Transfer, WPT), and both the wired charging system and the wireless charging system are equipped with corresponding rectifier circuits and DC filters. The wired charging system can be connected to the power supply equipment (such as wired charging piles and charging guns, etc.) by wire, and the AC power transmitted by the charging equipment is converted into DC power through the rectifier circuit, and then the DC power is filtered through the DC filter to achieve wired charging. The wireless charging system can also receive the AC power transmitted by the wireless power transmitter (such as wireless charging piles and wireless charging pads, etc.), and the AC power is converted into DC power and filtered through the rectifier circuit and DC filter to achieve wireless charging.

[0004] On the one hand, since both the wired charging system and the wireless charging system in the prior art are provided with a rectifier circuit and a DC filter, it is not conducive to saving vehicle space and has a high cost, resulting in a poor user experience; on the other hand, in the prior art, corresponding wired charging systems and wireless charging systems need to be designed separately for different vehicles, resulting in large limitations for the wired charging system and the wireless charging system and lack of universal applicability. Summary of the invention

[0005] In view of this, the purpose of the embodiments of the present invention is to provide a vehicle charging method, a vehicle charging system and a vehicle, which can realize wired charging and wireless charging of the vehicle, save vehicle space while ensuring charging efficiency and charging safety, improve user experience, and be adaptable to different vehicles, with high universality.

[0006] In a first aspect, an embodiment of the present invention provides a vehicle charging system, the vehicle charging system comprising:

[0007] Wireless power receiving end;

[0008] An integrated circuit includes a wired charging circuit, a multiplexing circuit and a controlled switch group, wherein the multiplexing circuit includes a controller;

[0009] The controller is configured to obtain charging information, and control the controlled switch group according to the charging information so that the wired charging circuit is connected to the multiplexing circuit for wired charging, or so that the wireless power receiving end is connected to the multiplexing circuit for wireless charging.

[0010] In some embodiments, the controller is further configured to control the controlled switch group so that the multiplexing circuit is conductively connected to the wired charging circuit in response to the charging information including at least one wired charging signal.

[0011] In some embodiments, the wireless power receiving end includes:

[0012] a receiving coil configured to wirelessly acquire an alternating current signal transmitted by the wireless power transmitting end for transmission to a multiplexing circuit;

[0013] A locator, connected to the controller, and configured to obtain location information of the wireless power receiving end and the wireless power transmitting end for transmission to the controller;

[0014] The controller is further configured to control the controlled switch group so that the multiplexing circuit is connected to the wireless power receiving end in response to the charging information including the wireless charging signal and the position information indicating that the wireless power receiving end and the wireless power transmitting end meet the predetermined position condition.

[0015] In some embodiments, the controller is further configured to control switching the charging state of the vehicle charging system to a wired charging state in response to the vehicle charging system being in a wireless charging state and the currently acquired charging information including at least one wired charging signal.

[0016] In some embodiments, the wired charging circuit includes:

[0017] The first filter is configured to obtain the to-be-processed alternating current signal transmitted by the power supply device, and filter the to-be-processed alternating current signal to obtain a filtered signal.

[0018] In some embodiments, the wired charging circuit further comprises:

[0019] The power factor correction circuit is connected to the first filter and is configured to perform power factor correction on the first filtered signal to obtain a correction signal and convert the correction signal into a first direct current signal.

[0020] In some embodiments, the wired charging circuit further comprises:

[0021] The inverter circuit is connected to the power factor correction circuit and is configured to isolate the first DC power signal and convert the isolated first DC power signal into an AC power signal to be regulated.

[0022] In some embodiments, the wired charging circuit further comprises:

[0023] The isolation transformer includes a primary winding and a secondary winding. The primary winding is connected to the inverter circuit, and the secondary winding is connected to the multiplexing circuit. The isolation transformer is configured to perform voltage regulation on the AC power signal to be regulated to obtain a processed AC power signal for transmission to the multiplexing circuit.

[0024] In some embodiments, the controlled switch group includes a first controlled switch and a second controlled switch, and the multiplexing circuit further includes:

[0025] The rectifier circuit is conductively connected to the isolation transformer through a first controlled switch, or is conductively connected to the wireless power receiving end through a second controlled switch. The rectifier circuit is configured to convert the AC power signal transmitted by the isolation transformer or the wireless power receiving end into a second DC power signal.

[0026] In some embodiments, the vehicle charging system further includes a charging control system, the charging control system includes a power distributor and / or a battery manager, and the multiplexing circuit further includes:

[0027] The second filter is connected to the rectifier circuit and the charging control system, and is configured to filter the second DC signal to obtain an output signal so as to charge the vehicle through the charging control system.

[0028] In some embodiments, the integrated circuit further includes:

[0029] A power factor correction driving circuit is connected to the power factor correction circuit and the controller;

[0030] The controller is further configured to control the power factor correction circuit through the power factor correction drive circuit to perform power factor correction on the first filtered signal to obtain a correction signal, and convert the correction signal into a first direct current signal.

[0031] In some embodiments, the integrated circuit further includes:

[0032] An inverter drive circuit is connected to the controller and the inverter circuit;

[0033] The controller is further configured to control the inverter circuit through the inverter drive circuit to isolate the first DC signal, and convert the isolated first DC signal into an AC signal to be regulated.

[0034] In some embodiments, the multiplexing circuit further comprises:

[0035] A rectifier drive circuit is connected to the controller and the rectifier circuit;

[0036] The controller is further configured to control the rectifier circuit to convert the AC signal into a second DC signal through the rectifier drive circuit.

[0037] In some embodiments, the multiplexing circuit further comprises:

[0038] The detection circuit is connected to the controller and the second filter and is configured to obtain detection information including voltage information and current information for transmission to the controller.

[0039] In some embodiments, the multiplexing circuit further comprises:

[0040] The protection circuit is connected to the controller and the detection circuit, and is configured to output a protection signal to protect the second filter in response to the detection information indicating an overload or a short circuit.

[0041] In a second aspect, an embodiment of the present invention provides a vehicle charging method, the vehicle charging method comprising:

[0042] Get charging information;

[0043] The controlled switch group is controlled according to the charging information so that the wired charging circuit in the vehicle charging system integrated circuit is connected to the multiplexing circuit for wired charging, or the wireless power receiving end is connected to the multiplexing circuit for wireless charging.

[0044] In some embodiments, controlling the controlled switch group according to the charging information so that the wired charging circuit in the integrated circuit is connected to the multiplexing circuit for wired charging includes:

[0045] In response to the charging information including at least one wired charging signal, the controlled switch group is controlled so that the multiplexing circuit is conductively connected to the wired charging circuit.

[0046] In some embodiments, the wireless power receiving end includes a locator and a receiving coil, and controlling the controlled switch group according to the charging information so that the wireless power receiving end is connected to the multiplexing circuit for wireless charging includes:

[0047] In response to the charging information including the wireless charging signal, and the position information of the wireless power receiving end and the wireless power transmitting end obtained by the locator meets the predetermined position condition, the controlled switch group is controlled so that the wireless power receiving end is connected to the multiplexing circuit, and the AC power signal transmitted by the wireless power transmitting end is wirelessly obtained through the receiving coil for transmission to the multiplexing circuit.

[0048] In some embodiments, controlling the controlled switch group according to the charging information so that the wired charging circuit in the integrated circuit is connected to the multiplexing circuit for wired charging includes:

[0049] In response to the vehicle charging system being in a wireless charging state and the currently acquired charging information including at least one wired charging signal, the charging state of the vehicle charging system is controlled to be switched to a wired charging state.

[0050] In a third aspect, an embodiment of the present invention provides a vehicle, the vehicle comprising:

[0051] the vehicle body; and

[0052] As the vehicle charging system of the first aspect.

[0053] The embodiment of the present invention integrates the wired charging circuit, the multiplexing circuit and the controlled switch group to obtain an integrated circuit, connects the integrated circuit to the wireless power receiving end, obtains charging information through the controller in the multiplexing circuit, and if the charging information includes a wired charging signal, controls the controlled switch group so that the wired charging circuit is connected to the multiplexing circuit for wired charging; if the charging information includes a wireless charging signal, controls the controlled switch group so that the wireless power receiving end is connected to the multiplexing circuit for wireless charging. In this way, wired charging and wireless charging of the vehicle can be realized, while ensuring charging efficiency and charging safety, saving vehicle space, improving user experience, and being adaptable to different vehicles, with high universality. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0055] Figure 1 is a circuit diagram of a vehicle charging system according to an embodiment of the present invention;

[0056] Figure 2 is a flow chart of a vehicle charging method according to an embodiment of the present invention;

[0057] Figure 3 is an equivalent circuit diagram of a vehicle charging system according to an embodiment of the present invention;

[0058] Figure 4 is an equivalent circuit diagram of a vehicle charging system according to an embodiment of the present invention;

[0059] Figure 5 is an equivalent circuit diagram of a vehicle charging system according to an embodiment of the present invention;

[0060] Figure 6 is a schematic diagram of a wireless power receiving end in an embodiment of the present invention;

[0061] Figure 7 is a schematic diagram of a vehicle according to an embodiment of the present invention;

[0062] Figure 8 is a circuit diagram of a first impedance matching network in an embodiment of the present invention;

[0063] Fig. 9 is an equivalent circuit diagram of a first impedance matching network in an embodiment of the present invention;

[0064] Fig.10 is a schematic diagram of a correspondence between a predetermined capacitance value of a first impedance matching network and a predetermined height and a predetermined inductance value of a receiving coil in an embodiment of the present invention;

[0065] Fig.11 is an equivalent circuit diagram of a vehicle charging system in an embodiment of the present invention in a wired charging state;

[0066] Fig.12 is an equivalent circuit diagram of the vehicle charging system according to an embodiment of the present invention in a wireless charging state.

[0067] Description of reference numerals:

[0068] 100-Vehicle charging system;

[0069] 1-Integrated circuit;

[0070] 11-wired charging circuit; 111-first filter; 112-power factor correction circuit; 113-inverter circuit; 114-isolation transformer; N1-primary winding; N2-secondary winding;

[0071] 12-controlled switch group; S12'-controlled switch; a1', a2'-nodes; S1', 121-first controlled switches; S2', 122-second controlled switches; S11, S12-first sub-controlled switches; S21, S22-second sub-controlled switches;

[0072] 13-multiplexing circuit; 131-controller; 1311-control unit; 1312-first processing unit; 1313-second processing unit;

[0073] 132-rectifier circuit; D1, D2, D3, D4-diodes;

[0074] 133-second filter; 134-rectifier drive circuit; 135-detection circuit; 136-protection circuit;

[0075] 14-power factor correction drive circuit; 15-inverter drive circuit;

[0076] 16-second impedance matching network; L1-first inductor; L2-second inductor;

[0077] 2-wireless power receiving end; 21-wireless power receiving end upper cover;

[0078] 22-first impedance matching network; 221-first capacitor module; C1, C2, C3, C4-first capacitor sub-module; 222-second capacitor module; C5, C6, C7, C8-second capacitor sub-module; 223-third capacitor module; C9-third capacitor sub-module;

[0079] 23- ferrite; 24- positioner; 25- receiving coil; 26- coil tray;

[0080] 3-PDU / BMS system;

[0081] 200-vehicle body; 4-vehicle battery; 5-vehicle chassis;

[0082] 300- wireless power transmitter; 6- transmitting coil;

[0083] 400 - ground; DETAILED DESCRIPTION

[0084] The present invention is described below based on embodiments, but the present invention is not limited to these embodiments. In the detailed description of the present invention below, some specific details are described in detail. It is possible for a person skilled in the art to fully understand the present invention without the description of these details. In order to avoid confusing the essence of the present invention, known methods, processes, flows, components and circuits are not described in detail.

[0085] In addition, persons of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes and are not necessarily drawn to scale.

[0086] At the same time, it should be understood that in the following description, "circuit" refers to a conductive circuit composed of at least one element or subcircuit through electrical connection or electromagnetic connection. When an element or circuit is said to be "connected to" another element or an element / circuit is said to be "connected between" two nodes, it can be directly coupled or connected to another element or there can be an intermediate element, and the connection between the elements can be physical, logical, or a combination thereof. On the contrary, when an element is said to be "directly coupled to" or "directly connected to" another element, it means that there is no intermediate element between the two.

[0087] Unless the context clearly requires otherwise, the words "include", "comprising" and the like throughout this application should be interpreted as including rather than exclusive or exhaustive; that is, as meaning "including but not limited to".

[0088] In the description of the present invention, it is to be understood that the terms "first", "second", etc. are only configured for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0089] In the following description, the vehicle charging system and the vehicle charging method are applied to the scenarios of wired charging and wireless charging of new energy vehicles. It should be understood that the charging system and the charging method involved in the embodiments of the present invention can also be designed to be applied to various scenarios that require charging, such as charging of unmanned aircraft, charging of smart home devices, etc.

[0090] Figure 1 FIG. 1 is a circuit diagram of a vehicle charging system according to an embodiment of the present invention. Figure 1 As shown, the vehicle charging system of this embodiment includes an integrated circuit 1 and a wireless power receiving end 2. The integrated circuit 1 includes a wired charging circuit 11, a controlled switch group 12 and a multiplexing circuit 13, and the multiplexing circuit 13 includes a controller 131. The wired charging circuit 11 is connected to the controlled switch group 12, and the controlled switch group 12 is connected to the wired charging circuit 11, the wireless power receiving end 2 and the controller 131 in the multiplexing circuit 13.

[0091] In this embodiment, the wireless power receiving end 2 includes a receiving coil and a locator. The locator is connected to the controller 131, and the controlled switch group 12 is connected to the receiving coil in the wireless power receiving end 2. The locator is used to obtain the position information of the wireless power receiving end 2 and the wireless power transmitting end (such as a wireless charging pile and a wireless charging pad, etc.) for transmission to the controller. The receiving coil is used to wirelessly obtain the AC power signal transmitted by the wireless power transmitting end, which has been transmitted to the multiplexing circuit 13 through the controlled switch group 12 for wireless charging. Further, the vehicle charging method of this embodiment can refer to Figure 2 .

[0092] Figure 2 FIG. 1 is a flow chart of a vehicle charging method according to an embodiment of the present invention. Figure 2 As shown, the vehicle charging method of this embodiment includes the following steps:

[0093] Step S100: Obtain charging information

[0094] In this embodiment, the controller 131 is used to obtain charging information and control the charging state of the vehicle charging system according to the charging information, wherein the charging state includes a wired charging state and a wireless charging state.

[0095] In an optional embodiment, the charging information includes at least one wired charging signal. That is, the controller 131 detects one or more wired charging signals and controls the charging state of the vehicle charging system to be in a wired charging state. Among them, the wired charging signal can be a CC signal (Connection Confirm Signal). That is to say, after the power supply device (that is, a wired charging pile and a charging gun, etc.) is successfully connected to the wired charging circuit 11, the power supply device can send a CC signal to the controller 131 through a wired charging chip (such as an IC chip (Integrated Circuit), etc.), so that the controller 131 confirms that the power supply device is successfully connected to the wired charging circuit 11 according to the CC signal and can perform wired charging. The wired charging signal can also be a CP signal (Control Press Signal). Specifically, the CP signal can indicate that the power supply device and the controller 131 have established a communication connection, that is, the power supply device sends a CP signal to the controller 131 for handshake and identification to establish a communication connection. The CP signal can also represent current regulation and control, that is, the power supply device sends a CP signal to the controller 131 to inform the controller 131 of the required charging current and voltage, and the controller 131 can adjust the current output of the vehicle charging system according to the CP signal to meet the requirements of the vehicle battery. The CP signal can also represent the wired charging state, that is, the power supply device sends a CP signal to the controller 131 to inform the controller 131 of the start, pause, resume and end of the wired charging, so that the controller 131 performs corresponding operations according to the wired charging state. It should be understood that this embodiment is described by taking the wired charging signal as a CC signal or a CP signal as an example, but the wired charging signal can also be a PP signal (Proximity Pilot Signal), a DP signal (Detection Pilot signal), a WP signal (Wake up Pilot signal), etc. Among them, the PP signal is used to detect the proximity of the power supply device to the vehicle socket (for example, the charging gun is inserted into the vehicle socket) to ensure the safety and reliability of the wired charging connection. The DP signal is used to detect the position and direction of the power supply device and the vehicle socket to ensure the correctness of the wired charging connection. The WP signal is used to wake up the vehicle charging system in a dormant state. That is, when the power supply device is ready to charge, the WP signal is sent to the controller 131, so that the controller 131 controls the components in the vehicle charging system to power on, or switches from the dormant state to the working state. The dormant state indicates that the power consumption of each component in the vehicle charging system is controlled to be less than or equal to a threshold value, and the working state indicates that the power consumption of each component in the vehicle charging system is controlled to be greater than a threshold value.

[0096] In another optional embodiment, the charging information includes a wireless charging signal. That is, the controller 131 detects the wireless charging signal and controls the charging state of the vehicle charging system to be in a wireless charging state. Among them, the wireless charging signal can be a wireless charging communication signal, that is, the wireless power transmitter sends a wireless charging communication signal to the controller 131 for information verification (such as a vehicle identification code (Vehicle Identification Number, VIN), etc.) to achieve wireless communication. Among them, the wireless charging signal can also be a WCS signal (Wireless Charging Start Signal), which indicates the start of wireless charging. It should be understood that this embodiment is illustrated by taking the wireless charging signal including a wireless charging communication signal or a WCS signal as an example, but the wireless charging signal can also be a FA signal (Fault Alarm Signal, fault signal). Among them, the FA signal is used to indicate an abnormality or failure of the vehicle charging system.

[0097] Step S200: controlling the controlled switch group according to the charging information so that the wired charging circuit in the vehicle charging system integrated circuit is connected to the multiplexing circuit for wired charging, or so that the wireless power receiving end is connected to the multiplexing circuit for wireless charging.

[0098] In this embodiment, the controller 131 can automatically control the charging state of the vehicle charging system to be in a wired charging state or a wireless charging state according to the charging information.

[0099] In an optional embodiment, if it is detected that the charging information includes one or more wired charging signals, the controller 131 controls the charging state of the vehicle charging system to be in a wired charging state. In the wired charging state, the controller 131 controls the controlled switch group 12 so that the multiplexing circuit 13 is connected to the wired charging circuit 11 for wired charging.

[0100] In another optional embodiment, if the charging information is detected to include a wireless charging signal, and the position information of the wireless power receiving terminal 2 and the wireless power transmitting terminal obtained by the locator indicates that the wireless power receiving terminal 2 and the wireless power transmitting terminal meet the predetermined position condition, that is, the wireless power receiving terminal 2 and the wireless power transmitting terminal are successfully aligned, the controller 131 controls the charging state of the vehicle charging system to be in a wireless charging state. In the wireless charging state, the controller 131 controls the controlled switch group 12 to connect the multiplexing circuit 13 to the wireless power receiving terminal 2 for wireless charging.

[0101] In another optional embodiment, when the charging state of the vehicle charging system is in the wireless charging state, the charging information currently acquired by the controller 131 includes at least one wired charging signal, and the charging state of the vehicle charging system is controlled to switch from the wireless charging state to the wired charging state. In other words, when the vehicle detects a wired charging signal during wireless charging, wireless charging is stopped, and wireless charging is subsequently performed. In this way, the charging efficiency of the vehicle can be guaranteed.

[0102] In another optional embodiment, when the charging state of the vehicle charging system is in the wired charging state, the charging information currently acquired by the controller 131 includes a wireless charging signal, and the position information of the wireless power receiving end 2 and the wireless power transmitting end acquired by the locator indicates that the wireless power receiving end 2 and the wireless power transmitting end meet the predetermined position condition, and the controller 131 keeps the charging state of the vehicle charging system in the wired charging state. That is, the vehicle detects the wireless charging signal during wired charging and keeps wired charging.

[0103] Optionally, the controller 131 is an electronic device with data processing, data storage and human-computer interaction functions, and the user can interact with the controller to control the charging state of the vehicle charging system to be in a wired charging state or a wireless charging state. For example, the controller 131 may include a touch screen, and the user can achieve human-computer interaction by touching the screen to control the charging state of the vehicle charging system to be in a wired charging state. In this way, the user experience can be improved.

[0104] In this embodiment, the controlled switch group 12 is connected to the wired charging circuit 11, the controller 131 and the wireless power receiving end 2. Thus, the controller 131 can control the controlled switch group 12 to make the multiplexing circuit 13 conductively connected to the wired charging circuit 11 for wired charging, or to make the multiplexing circuit 13 conductively connected to the wireless power receiving end 2 for wireless charging.

[0105] In an optional embodiment, the controlled switch group 12 may include a controlled switch, and the controlled switch is a radio frequency switch. Figure 3 .

[0106] Figure 3 FIG. 1 is an equivalent circuit diagram of a vehicle charging system according to an embodiment of the present invention. Figure 3 As shown, the controlled switch group 12 includes a controlled switch S12'. The controlled switch S12' includes nodes a1' and a2', the node a1' is connected to the wired charging circuit 11, the node a2' is connected to the wireless power receiving end 2, and the controlled switch S12' is a single pole double throw switch (SPDT).

[0107] In this embodiment, the controller 131 can control the controlled switch S12' to conduct to the node a1' after detecting that the charging information includes at least one wired charging signal, so that the multiplexing circuit 13 is connected to the wired charging circuit 11 for wired charging. The controller 131 can also control the controlled switch S12' to conduct to the node a2' after detecting that the charging information includes a wireless charging signal, so that the multiplexing circuit 13 is connected to the wireless power receiving end 2 for wireless charging. In this way, wired charging and wireless charging of the vehicle can be realized.

[0108] In another optional embodiment, the controlled switch group 12 may include a plurality of controlled switches, the plurality of controlled switches including a first controlled switch and a second controlled switch, and the first controlled switch and the second controlled switch are radio frequency switches. Figure 4 .

[0109] Figure 4 FIG. 1 is an equivalent circuit diagram of a vehicle charging system according to an embodiment of the present invention. Figure 4 As shown, the controlled switch group 12 of this embodiment includes a first controlled switch S1' and a second controlled switch S2'. The first controlled switch S1' is connected between the multiplexing circuit 13 and the wired charging circuit 11. The second controlled switch S2' is connected between the multiplexing circuit 13 and the wireless power receiving end 2. The first controlled switch S1' and the second controlled switch S2' are single pole single throw switches (SPST).

[0110] In this embodiment, after detecting that the charging information includes at least one wired charging signal, the controller 131 can control the first controlled switch S1' to be turned on and keep the second controlled switch S2' turned off, so that the multiplexing circuit 13 is connected to the wired charging circuit 11 for wired charging. The controller 131 can also control the second controlled switch S2' to be turned on and keep the first controlled switch S1' turned off after detecting that the charging information includes a wireless charging signal, so that the multiplexing circuit 13 is connected to the wireless power receiving end 2 for wireless charging. In this way, wired charging and wireless charging of the vehicle can be achieved.

[0111] In another optional embodiment, the controlled switch group 12 may include a plurality of controlled switches, wherein the plurality of controlled switches include a first controlled switch and a second controlled switch, and the first controlled switch and the second controlled switch each include a plurality of sub-controlled switches. In the following description, the controlled switch group 12 includes a first controlled switch and a second controlled switch, and the first controlled switch and the second controlled switch each include a plurality of sub-controlled switches. For details, please refer to Figure 5 .

[0112] Figure 5FIG. 1 is an equivalent circuit diagram of a vehicle charging system according to an embodiment of the present invention. Figure 5 As shown, the equivalent circuit diagram of the vehicle charging system of this embodiment includes an integrated circuit 1 and a wireless power receiving end 2. Among them, the integrated circuit 1 includes a wired charging circuit 11, a controlled switch group 12, a multiplexing circuit 13, a power factor correction drive circuit 14, an inverter drive circuit 15 and a second impedance matching network 16. The wired charging circuit 11 includes a first filter 111, a power factor correction circuit 112, an inverter circuit 113 and an isolation transformer 114. The isolation transformer 114 includes a primary winding N1 and a secondary winding N2. The controlled switch group 12 includes a first controlled switch 121 and a second controlled switch 122, the first controlled switch 121 includes first sub-controlled switches S11 and S12, and the second controlled switch 122 includes second sub-controlled switches S21 and S22. The multiplexing circuit 13 includes a controller 131, a rectifier circuit 132, a second filter 133, a rectifier drive circuit 134, a detection circuit 135 and a protection circuit 136. The controller 131 includes a control unit 1311, a first processing unit 1312, and a second processing unit 1313. The second impedance matching network 16 includes a first inductor L1 and a second inductor L2.

[0113] In this embodiment, the control unit 1311 is connected to the first processing unit 1312 and the second processing unit 1313 .

[0114] The first processing unit 1312 is connected to the power factor correction driving circuit 14 .

[0115] The second processing unit 1313 is connected to the control unit 1311 , the inverter drive circuit 15 , the rectifier drive circuit 134 , the detection circuit 135 and the protection circuit 136 .

[0116] The protection circuit 136 is connected to the detection circuit 135 and the second processing unit 1313 .

[0117] The detection circuit 135 is connected to the protection circuit 136 , the second processing unit 1313 and the second filter 133 .

[0118] The power factor correction driving circuit 14 is connected between the first processing unit 1312 and the power factor correction circuit 112 .

[0119] The inverter driving circuit 15 is connected between the second processing unit 1313 and the inverter circuit 113 .

[0120] The rectifier driving circuit 134 is connected between the second processing unit 1313 and the rectifier circuit 132 .

[0121] One end of the first filter 111 is connected to the power factor correction circuit 112 , and the other end of the first filter 111 is connected to the power supply device.

[0122] The power factor correction circuit 112 is connected between the first filter 111 and the inverter circuit 113 .

[0123] The inverter circuit 113 is connected between the power factor correction circuit 112 and the primary winding N1 of the isolation transformer 114 .

[0124] The primary winding N1 of the isolation transformer 114 is connected to the inverter circuit 113 , one end of the secondary winding N2 is connected to the rectifier circuit 132 via the first sub-controlled switch S11 , and the other end of the secondary winding N2 is connected to the rectifier circuit 132 via the first sub-controlled switch S12 .

[0125] One end of the rectifier circuit 132 is connected to the first sub-controlled switches S11 and S12 , and the other end is connected to the second filter 133 .

[0126] One end of the second sub-controlled switch S21 is connected to a node between the first sub-controlled switch S11 and the rectifier circuit 132, and the other end is connected to the first inductor L1.

[0127] One end of the second sub-controlled switch S22 is connected to a node between the first sub-controlled switch S12 and the rectifier circuit 132, and the other end is connected to the second inductor L2.

[0128] The first inductor L1 is connected between the second controlled sub-switch S21 and the wireless power receiving terminal 2 .

[0129] The second inductor L2 is connected between the second sub-controlled switch S22 and the wireless power receiving terminal 2 .

[0130] In this embodiment, the first filter 111 may be an AC EMI filter (Alternating Current Electromagnetic Interference), which is used to obtain the to-be-processed AC power signal transmitted by the power supply device, and filter the to-be-processed AC power signal to output a filtered signal, and send the filtered signal to the power factor correction circuit 112. In other words, the AC EMI filter can suppress high-frequency noise and interference signals (such as crosstalk signals) caused by the AC power supply, thereby reducing electromagnetic interference, thereby ensuring the power quality and stability of the wired charging process, and at the same time, the AC EMI filter can reduce the interference of the vehicle charging system on the power supply device power grid.

[0131] Optionally, the first filter 111 may include a first inductor filter circuit and a first RC network, etc. The high-frequency noise and interference are filtered out by the impedance characteristics of the inductor in the first inductor filter circuit, that is, since the inductor has a higher impedance to the high-frequency signal, it can prevent the high-frequency noise from passing through, thereby filtering the interference. And through the inductor and capacitor connected in series or in parallel in the first RC network, the AC signal to be processed within different frequency ranges is filtered.

[0132] Optionally, the first filter 111 can be connected to the power supply device through an AC high-voltage wire harness, such as an insulated power cable, an elastic cable, etc. Among them, the insulated power cable may include a conductor, an insulating material, and a protective sheath, which has a predetermined wire size and current capacity so that it can carry the current and power required during the charging process. The elastic cable may include a flexible insulating material and a wire, which has high flexibility and elasticity, and is easy to install and connect.

[0133] In this embodiment, the power factor correction circuit 112 may be a PFC circuit (Power Factor Correction), which is used to perform power factor correction processing on the first filtered signal transmitted by the first filter 111 to obtain a correction signal, and then convert the correction signal in the form of alternating current into a first direct current signal for transmission to the inverter circuit 113. Among them, the power factor is a parameter used to characterize the phase relationship (i.e., phase difference) between current and voltage and the degree of waveform distortion (i.e., harmonic distortion). The phase difference characterizes the time delay relationship between current and voltage. Ideally, the current and voltage should be synchronized, that is, the phase difference is zero. Due to the presence of capacitors, inductors and other components in the vehicle charging system, there is a certain phase difference between the current and voltage. Harmonic distortion characterizes the harmonic components in the current and voltage waveforms. Ideally, the current and voltage should be sinusoidal waveforms. Due to the presence of harmonic components during wired charging, the power factor decreases. Specifically, the power factor correction circuit 112 corrects the current waveform to synchronize it with the voltage waveform and maintain a predetermined phase difference to reduce harmonic components, thereby correcting the power factor of the first filtered signal to obtain a correction signal to reduce the interference of the vehicle charging system on the power supply equipment power grid.

[0134] Optionally, the power factor correction circuit 112 may include a compensation circuit, a filter circuit, etc., and the filter circuit includes components such as capacitors and inductors. The power factor correction circuit 112 shapes and filters the current waveform of the first filter signal through the capacitors and inductors in the filter circuit to reduce the harmonic components and make it closer to a sine wave, and corrects the current phase of the first filter signal through the compensation circuit to synchronize it with the voltage to maintain a predetermined phase difference.

[0135] In this embodiment, the inverter circuit 113 is used to isolate the first DC signal transmitted by the power factor correction circuit 112, and convert the isolated first DC signal into an AC signal to be regulated. Specifically, the inverter circuit 113 can regulate the first DC signal to obtain a high-voltage DC signal and a low-voltage DC signal, and then isolate the high-voltage DC signal and the low-voltage DC signal, transmit the low-voltage DC signal to the low-voltage electronic equipment and motor of the vehicle for power supply, and convert the high-voltage DC signal into an AC signal to be regulated, so as to be transmitted to the isolation transformer 114.

[0136] Optionally, the inverter circuit 113 includes an input filter circuit, an output filter circuit, an isolated DC / DC converter and a high-frequency switch element, etc. Among them, the high-frequency switch element can be implemented by a transistor, such as a MOSFET (Metal Oxide Semiconductor Field-Effect Transistor), an IGBT (Insulated Gate Bipolar Transistor), etc. Specifically, the input filter circuit filters the first DC signal to remove possible high-frequency noise and interference, and then the isolated DC / DC converter regulates the first DC signal to obtain a high-voltage DC signal and a low-voltage DC signal, and isolates the high-voltage DC signal and the low-voltage DC signal, and converts the high-voltage DC signal into an AC signal through a high-frequency switch element. Among them, the controller 131 can control the high-frequency switch element to be in a high-frequency switching state through the inverter drive circuit 15, that is, continuously switching the connection and disconnection of the circuit, thereby generating an AC signal to be regulated.

[0137] In this embodiment, the isolation transformer 114 is used for electrical isolation, that is, to isolate the wired charging circuit 11 and the multiplexing circuit 13, thereby improving the safety of the vehicle charging system and preventing electrical interference, and performing voltage regulation on the AC power signal to be regulated transmitted by the inverter circuit 113 to obtain a processed AC power signal for transmission to the rectifier circuit 132 in the multiplexing circuit 13.

[0138] In this embodiment, the number of turns of the primary winding N1 and the secondary winding N2 of the isolation transformer 114 have a predetermined ratio, so as to achieve a step-up or step-down operation on the AC power signal to be regulated.

[0139] Optionally, the AC signal obtained by the isolation transformer 114 after voltage regulation of the AC signal to be regulated is the same as the voltage of the AC signal transmitted by the wireless power transmitting end obtained by the receiving coil in the wireless power receiving end 2. In this way, wired charging and wireless charging of the vehicle can be realized.

[0140] In this embodiment, the rectifier circuit 132 is used to convert the AC signal transmitted by the isolation transformer 114 or the receiving coil in the wireless power receiving end 2 into a second DC signal for transmission to the second filter 133. Specifically, the rectifier circuit 132 can be based on the waveform of the AC signal so that only the positive half cycle or the negative half cycle signal passes, while the reverse half cycle is blocked. Thus, the second DC signal can be obtained.

[0141] Optionally, the rectifier circuit 132 may be implemented by a single-phase half-wave rectifier, a single-phase full-wave rectifier, a three-phase half-wave rectifier, a three-phase full-wave rectifier, or the like.

[0142] In this embodiment, the second filter 133 may be a DC EMI filter (Direct Current Electromagnetic Interference, direct current electromagnetic interference), which is used to filter the second direct current signal transmitted by the rectifier circuit 132 to obtain an output signal for charging the vehicle. That is to say, since the rectifier circuit 132 may have ripples and harmonics during the rectification process, the second direct current signal received by the second filter 133 may have ripples and harmonics, and the second direct current signal may also have electromagnetic interference, and the electromagnetic interference includes high-frequency noise and interference signals, etc. Therefore, the second filter 133 can filter the high-frequency noise and interference signals in the second direct current signal, thereby reducing electromagnetic interference, and can filter the ripples and harmonics to obtain an output signal to ensure the power quality and wired charging stability during wired charging.

[0143] Optionally, the second filter 133 may include a second inductor filter circuit and a second RC network, etc. The impedance characteristics of the inductor of the second inductor filter circuit are used to filter out high-frequency noise and interference, and the inductor and capacitor connected in series in the second RC network are used to filter out ripples and harmonics in the second DC signal.

[0144] In this embodiment, the vehicle charging system also includes a charging control system, and the charging control system includes a power distribution unit (PDU) and / or a battery management system (BMS). In the following description, the power distribution unit is also the PDU system, and the battery management system is also the BMS system. The charging control system includes the PDU system and the BMS system as an example for explanation.

[0145] In this embodiment, the PDU system and the BMS system can be connected to the controller 131 in the integrated circuit 1 by wired connection, so that the PDU system and the BMS system can control the wired charging process or the wireless charging process through the controller 131. For example, the controller 131 can adjust the charging current, charging voltage and charging mode according to the instructions of the BMS system to ensure that the charging process meets the requirements of the vehicle battery and can ensure the safety and service life of the vehicle battery. Among them, the wired connection can be achieved through a low-voltage wiring harness, and the low-voltage wiring harness is implemented by a bus interface such as CAN (Controller Area Network), LIN (Local Interconnect Network), Type C, RS-485, UART (Universal Asynchronous Receiver / Transmitter). Among them, CAN is a serial communication protocol of the ISO International Organization for Standardization. LIN (bus is a low-cost serial communication protocol based on UART / SCI (Universal Asynchronous Receiver / Serial Interface), mainly used for serial communication of sensors and controllers. Type C belongs to a USB (Universal Serial Bus) interface appearance standard, which has the characteristics of small size and universality. The RS-485 bus standard is a bidirectional, balanced transmission standard interface widely used in industry (attendance, monitoring, data acquisition system), supporting multi-point connection. UART is a universal serial data bus for asynchronous communication. The bus has bidirectional communication and can realize full-duplex transmission and reception. At the same time, the PDU system and the BMS system can be connected to the second filter 133 through a DC wiring harness to realize the transmission of a DC signal (that is, an output signal). The DC wiring harness may include dedicated wires and connectors, etc. The dedicated wires can be realized through DC power lines, etc., and the connectors can be realized through the CCS standard (Combined The CCS standard is a widely used charging standard that combines alternating current (AC) charging and direct current (DC) fast charging functions. The CCS connector may include multiple pins for transmitting DC power and communication signals. The CHAdeMO standard is an international standard for fast charging of electric vehicles and is used for DC fast charging. CHAdeMO connectors can have dedicated plugs and sockets to achieve fast charging. As a result, the vehicle charging system can ensure charging efficiency and charging safety while having high universality.

[0146] In this embodiment, the PDU system is used to distribute the output signal of the second filter 133 (i.e., the DC signal) to the components in the vehicle that need to be charged, such as the vehicle battery, the motor, etc., to achieve wired charging or wireless charging. The BMS system is used to monitor and manage the status of the vehicle battery. In other words, the BMS system can detect the voltage, temperature, charge and discharge current and other parameters of the vehicle battery, and ensure the safe operation of wired charging or wireless charging. At the same time, the BMS system can communicate with the controller 131 to send the various parameters of the vehicle battery to the controller 131, so that the controller 131 can perform corresponding charging protection measures. For example, if the BMS system detects that the temperature of the vehicle battery exceeds the predetermined temperature, the controller 131 can stop charging, that is, turn off the first sub-controlled switch S11, S12 and the second sub-controlled switch S21, S22, and the controller 131 can display a prompt message through the touch screen, and the prompt message indicates that the temperature of the vehicle battery exceeds the predetermined temperature, so as to achieve an early warning prompt to the user.

[0147] In this embodiment, both the PDU system and the BMS system can be deployed independently. The PDU system and the BMS system can also be integrated in electronic devices (such as chips, etc.). Specifically, the PDU system can be integrated into the BMS system, that is, the BMS system can realize the predetermined functions of the PDU system, that is, the BMS system can monitor and manage the state of the vehicle battery, and can distribute the output signal of the second filter 133 to the components in the vehicle that need to be charged. The BMS system can also be integrated into the PDU system, that is, the PDU system can realize the predetermined functions of the BMS system. That is, the PDU system can distribute the output signal of the second filter 133 to the components in the vehicle that need to be charged, and can monitor and manage the state of the vehicle battery. As a result, the design of the vehicle charging system can be simplified, the electrical wiring can be simplified, and the vehicle space can be saved. In the following description, the independent deployment of the PDU system and the BMS system is used as an example for explanation.

[0148] In this embodiment, the controller 131 is connected to each component in the vehicle charging system to control the vehicle to perform wired charging or wireless charging. Among them, the control unit 1311, the first processing unit 1312 and the second processing unit 1313 in the controller 131 are used to implement different functions, which can be processing units arranged on different hardware computing platforms, or hardware devices arranged on a unified hardware platform or multiple software programs or interfaces providing services on a unified cloud platform. In the following description, the control unit 1311, the first processing unit 1312 and the second processing unit 1313 can be hardware devices arranged on the vehicle for illustration.

[0149] It should be noted that the control unit 1311, the first processing unit 1312 and the second processing unit 1313 may include a general computer hardware structure such as a memory and a processor, and the memory and the processor are connected by a bus. Among them, the memory is suitable for storing instructions or programs executable by the processor. The processor can be an independent microprocessor or a collection of one or more microprocessors. Thus, the processor executes the instructions stored in the memory to realize wired charging or wireless charging of the vehicle charging system. Among them, the processor can be implemented by MCU (Microcontroller Unit), PLC (Programmable Logic Controller), FPGA (Field-Programmable Gate Array), DSP (Digital Signal Processor) or ASIC (Application Specific Integrated Circuit). Further, the control unit 1311, the first processing unit 1312 and the second processing unit 1313 can be deployed independently. The first processing unit 1312 and the second processing unit 1313 may also be integrated in the control unit 1311, that is, the control unit 1311 may implement the predetermined functions of the first processing unit 1312 and the second processing unit 1313. In the following description, the control unit 1311 is an MCU, i.e., a microcontroller unit, the first processing unit 1312 is a DSP1, the second processing unit 1313 is a DSP2, i.e., a digital signal processor, and the control unit 1311, the first processing unit 1312, and the second processing unit 1313 are all independently deployed.

[0150] In this embodiment, the vehicle charging system includes a wireless communication module connected to the controller 131, and the wireless communication module can be implemented by a Wifi module, etc. Then the controller 131 can obtain the wireless charging signal sent by the wireless power transmitter through the wireless communication module. Among them, the wireless communication module can be set in the integrated circuit 1, and can also be set in the wireless power receiver 2.

[0151] Optionally, after detecting that the charging information includes at least one wired charging signal, the MCU can control the first sub-controlled switches S11 and S12 to be turned on through the RF switch driving circuit, and keep the second sub-controlled switches S21 and S22 turned off, so that the multiplexing circuit 13 is connected to the wired charging circuit 11 for wired charging. The MCU can also control the second sub-controlled switches S21 and S22 to be turned on through the RF switch driving circuit, and keep the first sub-controlled switches S11 and S12 turned off, so that the multiplexing circuit 13 is connected to the wireless power receiving terminal 2 for wireless charging after detecting that the charging information includes a wireless charging signal, and the position information of the wireless power receiving terminal 2 and the wireless power transmitting terminal obtained by the locator indicates that the wireless power receiving terminal 2 and the wireless power transmitting terminal meet the predetermined position conditions. In this way, wired charging and wireless charging of the vehicle can be achieved.

[0152] Optionally, when the MCU does not detect charging information, it can control the charging state of the vehicle charging system to be in a standby state. In the standby state, the first sub-controlled switches S11, S12 and the second sub-controlled switches S21, S22 are all turned off, that is, the multiplexing circuit 13 is disconnected from the wireless power receiving end 2 and the wired charging circuit 11.

[0153] In this embodiment, the MCU can control the power factor correction drive circuit 14 through the DSP1 to drive the power factor correction circuit 112 to perform power factor correction on the first filtered signal transmitted by the first filter 111 to obtain a correction signal, and convert the correction signal into a first DC signal to be transmitted to the inverter circuit 113. Specifically, the MCU can collect the current data and voltage data of the AC signal to be processed transmitted by the power supply device and the first filtered signal transmitted by the first filter 111 through a sensor or an acquisition circuit to send to the DSP1, and the DSP1 performs digital signal processing on the current data and voltage data according to a predetermined processing algorithm and / or control logic, and calculates the current power factor and the power factor to be corrected, so as to feed back to the MCU. Then, the MCU generates a corresponding control signal according to the power factor to be corrected fed back by DSP1, and connects to the power factor correction drive circuit 14 through an output port or a bus to transmit the control signal to the power factor correction drive circuit 14, so that the power factor correction drive circuit 14 controls the power factor correction circuit 112 to perform corresponding operations (such as shaping and filtering the current waveform of the first filtered signal, etc.) according to the control signal, thereby achieving power factor correction of the first filtered signal to obtain a correction signal, and converting the correction signal into a first DC signal.

[0154] In this embodiment, the MCU can control the inverter drive circuit 15 through DSP2 to drive the inverter circuit 113 to isolate the first DC signal transmitted by the power factor correction circuit 112, and convert the isolated first DC signal into an AC signal to be regulated for transmission to the isolation transformer 114. Similar to the way in which the MCU controls the power factor correction drive circuit 14 through DSP1, the MCU can collect the current data and voltage data of the first DC signal to obtain a feedback signal through digital signal processing by DSP2 for transmission to the MCU. Then, the MCU generates a corresponding control signal according to the feedback signal of DSP2, and sends the control signal to the inverter drive circuit 15 through the output port or bus, so that the inverter drive circuit 15 controls the inverter circuit 113 to perform corresponding operations (such as filtering and voltage regulation of the first DC signal) according to the control signal. Furthermore, the MCU can control the rectifier drive circuit 134 through DSP2 to drive the rectifier circuit 132 to the isolation transformer 114, or convert the AC power signal transmitted by the wireless power receiving end 2 into a second DC power signal. The specific implementation method is similar to the process of the above-mentioned MCU controlling the inverter drive circuit 15 through DSP2, and the present invention will not be repeated here.

[0155] In this embodiment, a locator driving circuit may be provided in the integrated circuit 1 or in the wireless power receiving end 2. The locator driving circuit is connected to the locator, and the locator driving circuit is connected to the controller 131. Thus, the controller 131 may control the locator through the locator driving circuit to obtain the location information of the wireless power receiving end 2 and the wireless power transmitting end.

[0156] In this embodiment, the power factor correction drive circuit 14, the inverter drive circuit 15, the rectifier drive circuit 134 and the positioner drive circuit can be implemented by MCU, PLC, FPGA, DSP, ASIC and the like.

[0157] In this embodiment, the detection circuit 135 can detect the output signal of the second filter 133 to obtain detection information, which includes voltage information and current information, that is, the voltage and current of the output signal, so as to transmit the detection information to the DSP2 and the MCU for storage, and transmit the detection information to the protection circuit 136. Then, the protection circuit 136 compares the detection information with the voltage threshold and the current threshold to determine whether the detection information represents an overload or a short circuit, and outputs a protection signal to protect the second filter 133.

[0158] Optionally, a radio frequency switch or relay may be provided between the second filter 133 and the charging control system. The protection signal may be implemented by a digital signal, an analog signal, or the like. In the following description, the protection signal is taken as an example that the digital signal is a protection signal, and the digital signal may be a binary high-level signal or a low-level signal, the high-level signal is greater than or equal to the level threshold, and the low-level signal is less than the level threshold. The protection circuit 136 may control the radio frequency switch or relay to be turned on by a high-level signal, or may control the radio frequency switch or relay to be turned off by a low-level signal.

[0159] In an optional embodiment, if the voltage information in the detection information is greater than or equal to the voltage threshold, and / or the current information is greater than or equal to the current threshold, the protection circuit 136 determines that there is an overload or short circuit, and outputs a low-level signal to turn off the RF switch or relay, thereby disconnecting the second filter 133 from the charging control system. In this way, the safety of the vehicle charging system is ensured.

[0160] In another optional embodiment, if the voltage information in the detection information is less than the voltage threshold and the current information is less than the current threshold, the protection circuit 136 determines that there is no overload or short circuit, so that the RF switch or relay is turned on, and the detection circuit 135 detects the output signal at subsequent times in real time.

[0161] Optionally, the detection circuit 135 may include a current sensor (e.g., a Hall effect sensor, a current transformer), a voltage sensor (e.g., a voltage divider resistor, a voltage comparator), etc. The detection circuit 135 may obtain the current information and voltage information of the output signal of the second filter 133 through the current sensor and the voltage sensor to determine the detection information. Correspondingly, the protection circuit 136 may include a comparator, a control circuit, etc. The comparator is used to compare the detection information with the voltage threshold and the current threshold to obtain a comparison result. The control circuit is used to generate a protection signal based on the comparison result. Among them, the comparison result can represent the presence of an overload or a short circuit, and the comparison result can also represent the absence of an overload or a short circuit.

[0162] Optionally, the detection circuit 135 can also be connected to the power factor correction circuit 112, the inverter circuit 113, the rectifier circuit 132, etc., to respectively detect the voltage and current of the first DC signal, the AC signal to be regulated, and the second DC signal output by the power factor correction circuit 112, the inverter circuit 113, the rectifier circuit 132, etc., so as to transmit them to DSP2 and MCU, thereby ensuring the safety of the vehicle charging system.

[0163] In this embodiment, the multiplexing circuit 13 includes a controller 131, a rectifier circuit 132, a second filter 133, a rectifier drive circuit 134, a detection circuit 135 and a protection circuit 136 for explanation. At this time, the controlled switch group 12, the second impedance matching network 16 and the wireless power receiving end 2 are connected between the isolation transformer 114 and the rectifier circuit 132. However, the multiplexing circuit 13 of the embodiment of the present invention may also include a power factor correction circuit 112, an inverter circuit 113 and an isolation transformer 114, that is, the controlled switch group 12 is set between the first filter 111 and the power factor correction circuit 112 to achieve wired charging and wireless charging of the vehicle.

[0164] In this embodiment, since the output impedance of the receiving coil in the wireless power receiving terminal 2 may not match the input impedance of the rectifier circuit 132, efficient wireless power transmission cannot be achieved. In view of this situation, the embodiment of the present invention adds a second impedance matching network 16 between the rectifier circuit 132 and the receiving coil. The output impedance of the receiving coil in the wireless power receiving terminal 2 is impedance-transformed by the second impedance matching network 16, so that the output impedance of the receiving coil matches the input impedance of the rectifier circuit, thereby improving the wireless charging efficiency when the vehicle charging system is in a wireless charging state. Among them, the first inductor L1 and the second inductor L2 can have a predetermined inductance value to achieve impedance transformation of the output impedance of the receiving coil.

[0165] In this embodiment, since the prior art requires the design of corresponding wired charging systems and wireless charging systems for different vehicles, respectively. Specifically, for example, in the prior art, the receiving coil in the wireless charging system is usually set at a position with a predetermined height on the vehicle chassis to receive the AC signal sent by the wireless power transmitter. Since different vehicles may have different chassis heights, it is necessary to design a corresponding wireless charging system according to the chassis height of the vehicle to achieve efficient wireless charging, which leads to its large limitations and requires a large vehicle space. In view of this situation, this embodiment integrates the wired charging circuit 11, the controlled switch group 12, and the multiplexing circuit 13 to obtain an integrated circuit, so that the integrated circuit can be adapted to different vehicles and has high universality. Furthermore, in this embodiment, a first impedance matching network is set in the wireless power receiving end 2 to perform impedance transformation on the input impedance of the receiving coil, and the first impedance matching network has a predetermined capacitance value corresponding to the predetermined height of the receiving coil and the inductance value of the receiving coil, so that the corresponding wireless power receiving end 2 can be set according to the vehicle with the chassis height, so that it can be quickly adapted to different vehicles. Specifically, the schematic diagram of the wireless power receiving end 2 of this embodiment can be referred to Figure 6 .

[0166] Figure 6 Schematic diagram of a wireless power receiving end in an embodiment of the present invention. Figure 6 As shown, the wireless power receiving end 2 of this embodiment includes a wireless power receiving end upper cover 21, a first impedance matching network 22, a ferrite 23, a positioner 24, a receiving coil 25 and a coil tray 26. Among them, the wireless power receiving end upper cover 21, the first impedance matching network 22, the ferrite 23, the positioner 24, the receiving coil 25 and the coil tray 26 are arranged in sequence.

[0167] In this embodiment, the upper cover 21 of the wireless power receiving end can be made of magnetic materials, such as a magnetic shielding cover (Magnetic Shielding Cover, anti-magnetic shielding cover). Among them, the magnetic shielding cover can effectively shield external electromagnetic interference and has good thermal conductivity. Correspondingly, the coil tray 26 can be made of magnetic materials, such as a magnetic resonance coil tray (Magnetic Resonance Coil Tray, MRCT). Among them, the magnetic resonance coil tray can be matched with the wireless power transmitting end to improve the efficiency of wireless power transmission.

[0168] In this embodiment, the receiving coil 25 can be implemented by a power receiving coil, a planar coil, a multi-layer coil, a multi-turn coil, an embedded coil, etc., and is used to obtain the transmission of the wireless power transmitter in a wireless manner, so as to transmit it to the multiplexing circuit 13 through the ferrite 23 and the first impedance matching network 22 for wireless charging. Among them, the power receiving coil has the advantages of efficient transmission of wireless power and low positioning accuracy requirements. That is to say, the power receiving coil can efficiently receive the electromagnetic energy transmitted by the wireless power transmitter to achieve effective energy transmission and charging efficiency, and because the power receiving coil has a low positioning accuracy to the transmitting coil of the wireless power transmitter, it can be applied to different scenarios and has high universality. A planar coil is a coil with a planar structure, which can adopt a planar coil layout, and has the characteristics of simple structure and easy installation, and has high universality. A multi-layer coil can be a coil structure composed of multiple coils stacked together, which has a high power transmission efficiency and is suitable for high power transmission, fast charging and other scenarios. A multi-turn coil can be a coil structure composed of multiple coils wrapped around it, so that the electromagnetic induction area and induction efficiency of the coil are increased, thereby having high energy transmission efficiency and stability. The embedded coil can be designed as a coil structure embedded in the vehicle chassis or body structure, that is, the wireless power receiving end 2 can be set as a structure embedded in the vehicle chassis or body structure, so as to improve the aesthetics of the vehicle and provide better installation and protection performance. Therefore, the wireless power receiving end 2 can be set under the vehicle chassis, embedded in the vehicle chassis, or set in the body structure, which can save vehicle space, improve user experience, and be adapted to different vehicles, with high universality.

[0169] In the following description, it is taken as an example that the receiving coil 25 is a power receiving coil, the wireless power receiving end 2 is arranged under the chassis of the vehicle, and the receiving coil 25 has a predetermined height and a predetermined inductance value.

[0170] In this embodiment, the ferrite 23 is a material with good magnetic permeability and anti-magnetic interference performance. The ferrite 23, the positioner 24, and the receiving coil 25 are arranged in sequence. The ferrite 23 can enhance the induction effect of the receiving coil 25 on the electromagnetic field transmitted by the wireless power transmitter, thereby improving the energy transmission efficiency.

[0171] In this embodiment, the locator 24 is used to obtain the position information of the receiving coil 25 in the wireless power receiving end 2 and the transmitting coil in the wireless power transmitting end, and transmit it to the controller 131, so that the controller 131 can determine whether the wireless power receiving end 2 and the wireless power transmitting end meet the predetermined position conditions based on the position information to perform wireless charging.

[0172] Optionally, the first impedance matching network 22 is connected to the second impedance matching network 16 in the integrated circuit 1 through an AC high voltage harness. At the same time, the first impedance matching network 22, the locator 24, the receiving coil 25, etc. in the wireless power receiving end 2 can be connected to the controller 131 in the integrated circuit 1 through a low voltage harness.

[0173] In an optional embodiment, the AC high-voltage wiring harness and the low-voltage wiring harness can be designed with waterproof connectors at both ends. This design can use special waterproof connectors to ensure that both ends of the wiring harness have waterproof functions when connected. As a result, it can be applied to scenarios where the wiring harness needs to be frequently connected and disconnected, such as repair and replacement of parts.

[0174] In another optional embodiment, the AC high voltage harness and the low voltage harness can be designed as a Pigtail connection mode. The Pigtail connection mode is characterized by a cable being reserved at one end of the harness and a connector at the other end. This design mode can select the corresponding connector type according to user needs, thus having high universality.

[0175] In yet another optional implementation, the AC high voltage wiring harness and the low voltage wiring harness may be independently provided, or a single wiring harness in a one-to-two configuration may be used.

[0176] Optionally, the locator 24 includes a positioning coil, etc. When the receiving coil 25 is aligned with the transmitting coil in the wireless power transmitter, the positioning coil can sense the changing electromagnetic signal. Then the locator 24 processes the changing electromagnetic signal, and can determine the position information of the receiving coil 25 relative to the transmitting coil, and transmit it to the controller 131. Then the controller 131 can realize the accurate alignment of the receiving coil 25 and the transmitting coil according to the position information. Further, the schematic diagram of the vehicle of this embodiment can be referred to Figure 7 .

[0177] Figure 7 Schematic diagram of a vehicle according to an embodiment of the present invention. Figure 7 As shown, the vehicle of this embodiment includes a vehicle charging system 100 and a vehicle body 200. The vehicle charging system 100 includes an integrated circuit 1, a wireless power receiving end 2, and a PDU / BMS system 3. The vehicle body 200 includes a vehicle battery 4 and a vehicle chassis 5. The wireless power receiving end 2 is disposed below the vehicle chassis 5, and the receiving coil 25 has a predetermined height h from the ground 400.

[0178] In this embodiment, after the transmitting coil 6 and the receiving coil 25 in the wireless power transmitting end 300 are aligned successfully, the transmitting coil 6 transmits an AC signal to the receiving coil 25. Then, the receiving coil 25 charges the vehicle battery 4 through the first impedance matching network 22, the integrated circuit 1, and the PDU / BMS system 3. The circuit diagram of the first impedance matching network 22 can be referred to Figure 8 .

[0179] Figure 8 is a circuit diagram of a first impedance matching network in an embodiment of the present invention. Figure 8 As shown, the first impedance matching network 22 includes a first capacitor module 221, a second capacitor module 222 and a third capacitor module 223. Among them, one end of the receiving coil 25 is connected to the first capacitor module 221, and the other end of the receiving coil 25 is connected to the second capacitor module 222. The first capacitor module 221 is connected between the receiving coil 25 and the first inductor L1 in the second impedance matching network 16. The second capacitor module 222 is connected between the receiving coil 25 and the second inductor L2 in the second impedance matching network 16. One end of the third capacitor module 223 is connected to the node between the first capacitor module 221 and the first inductor L1, and the other end of the third capacitor module 223 is connected to the node between the second capacitor module 222 and the second inductor L2.

[0180] In this embodiment, in order to enable the wireless power receiving end 2 to quickly adapt to different vehicles, that is, because the vehicles with chassis of different heights make the corresponding receiving coils 25 have different heights, the coupling effect of the wirelessly transmitted magnetic field on the receiving coil 25 changes. The coupling effect represents the interaction between the magnetic field in the transmitting coil 6 and the receiving coil 25, so that the voltage and current of the AC signal induced by the receiving coil 25 change, thereby affecting the input impedance of the receiving coil 25. In view of this situation, this embodiment arranges multiple capacitor modules in the first impedance matching network 22, and arranges capacitor sub-modules in the capacitor module, so as to perform impedance transformation on the input impedance of the receiving coil 25 according to vehicles with different chassis heights, so as to improve the charging efficiency.

[0181] In this embodiment, the first impedance matching network 22 includes a first capacitor module 221, a second capacitor module 222 and a third capacitor module 223. However, the number of capacitor modules in this embodiment can be set according to the vehicle chassis height (that is, the predetermined height of the receiving coil), that is, according to the predetermined capacitance value of the predetermined height of the first impedance matching network 22 and the receiving coil 25 and the predetermined inductance value corresponding relationship, a corresponding number of capacitor modules are set. Further, the first capacitor module 221 and the second capacitor module 222 each include four capacitor sub-modules. For details, please refer to Fig. 9 .

[0182] Fig. 9 : is an equivalent circuit diagram of the first impedance matching network in an embodiment of the present invention. Fig. 9 As shown, the first capacitor module 221 includes first capacitor submodules C1, C2, C3 and C4, the second capacitor module 222 includes second capacitor submodules C5, C6, C7 and C8. The third capacitor module 223 includes a third capacitor submodule C9. The rectifier circuit 132 includes diodes D1, D2, D3 and D4.

[0183] In this embodiment, the first capacitor sub-modules C1 , C2 , C3 and C4 are sequentially connected in series between one side of the receiving coil 25 and the first inductor L1 .

[0184] The second capacitor sub-modules C5 , C6 , C7 and C8 are sequentially connected in series between the other side of the receiving coil 25 and the second inductor L2 .

[0185] One end of the third capacitor submodule C9 is connected to a node between the first capacitor submodule C4 and the first inductor L1 in the first capacitor module 221 , and the other end of the third capacitor submodule C9 is connected to a node between the second capacitor submodule C8 and the second inductor L2 in the second capacitor module 222 .

[0186] One end of the second controlled sub-switch S21 is connected to the first inductor L1 , and the other end is connected to a node between the diodes D1 and D2 .

[0187] One end of the second controlled sub-switch S22 is connected to the second inductor L2 , and the other end is connected to a node between the diodes D3 and D4 .

[0188] An anode of the diode D1 is connected to the second sub-controlled switch S21 and a cathode of the diode D2 , and a cathode of the diode D1 is connected to the diode D3 and the second filter 133 .

[0189] An anode of the diode D2 is connected to an anode of the diode D4 and the second filter 133 , and a cathode of the diode D2 is connected to the second sub-controlled switch S21 and an anode of the diode D1 .

[0190] An anode of the diode D3 is connected to the second sub-controlled switch S22 and a cathode of the diode D4 , and a cathode of the diode D3 is connected to the diode D1 and the second filter 133 .

[0191] An anode of the diode D4 is connected to an anode of the diode D2 and the second filter 133 , and a cathode of the diode D4 is connected to the second sub-controlled switch S22 and an anode of the diode D3 .

[0192] In this embodiment, the first capacitor submodule C1, C2, C3 and C4, the second capacitor submodule C5, C6, C7 and C8 and the third capacitor submodule C9 include one or more capacitors. At the same time, the predetermined capacitance value of the first impedance matching network 22 is determined according to the capacitance values ​​of the first capacitor module 221, the second capacitor module 222 and the third capacitor module 223. In other words, the number of capacitors in each first capacitor submodule, each second capacitor submodule and the third capacitor submodule can be increased or decreased to achieve the change of the predetermined capacitance value of the first impedance matching network 22.

[0193] In this embodiment, the receiving coil 25 can be set at a predetermined height, and the receiving coil 25 has a predetermined inductance value. Then the first impedance matching network 22 with different predetermined capacitance values ​​is connected to the receiving coil 25 respectively to perform impedance transformation on the input impedance of the receiving coil 25, and the power value, charging efficiency and other parameters of the receiving coil 25 are detected and received at the same time, and multiple power values, multiple charging efficiencies and other parameters corresponding to the receiving coil 25 when connected to the first impedance matching network 22 with different predetermined capacitance values ​​are obtained, and then the maximum power value, charging efficiency and other parameters are determined therefrom. Finally, the predetermined capacitance value of the first impedance matching network 22 corresponding to the maximum power value, charging efficiency and other parameters is determined as the corresponding relationship that the receiving coil 25 with the predetermined inductance value is set at the predetermined height. Further, according to the above method, multiple tests are performed to determine that the receiving coil 25 is set at different predetermined heights, and the receiving coil 25 has different predetermined inductance values ​​and the corresponding relationship between the predetermined capacitance value of the first impedance matching network 22 (that is, the capacitance value of the first capacitor module 221, the capacitance value of the second capacitor module 222 and the third capacitor module 223). Specifically, the schematic diagram of the correspondence between the predetermined capacitance value of the second impedance matching network 16 and the predetermined height and predetermined inductance value of the receiving coil 25 can be referred to Fig.10 .

[0194] Fig.10 Schematic diagram of the correspondence between the predetermined capacitance value of the first impedance matching network and the predetermined height and predetermined inductance value of the receiving coil in an embodiment of the present invention. Fig.10 As shown, h represents the predetermined height between the receiving coil 25 and the ground, in millimeter. L represents the predetermined inductance value of the receiving coil 25, in uH (i.e., microhenry). C221 represents the capacitance value of the first capacitor module 221, in nF (i.e., nanofarad). C222 represents the capacitance value of the second capacitor module 222, in nF. C223 represents the capacitance value of the third capacitor module 223, in nF.

[0195] In this embodiment, when the predetermined height h between the receiving coil 25 and the ground is 100-150 mm, and the predetermined inductance value of the receiving coil 25 is 36.5 uH-39.3 uH, the corresponding capacitance value C221 of the first capacitor module 221 is 265 nF, the capacitance value C222 of the second capacitor module 222 is 265 nF, and the capacitance value C223 of the third capacitor module 223 is 170 nF.

[0196] In this embodiment, when the predetermined height h between the receiving coil 25 and the ground is 140-210 mm, and the predetermined inductance value of the receiving coil 25 is 42.1 uH-43.7 uH, the corresponding capacitance value C221 of the first capacitor module 221 is 250 nF, the capacitance value C222 of the second capacitor module 222 is 250 nF, and the capacitance value C223 of the third capacitor module 223 is 170 nF.

[0197] In this embodiment, when the predetermined height h between the receiving coil 25 and the ground is 170-250 mm, and the predetermined inductance value of the receiving coil 25 is 37.9 uH-39 uH, the corresponding capacitance value C221 of the first capacitor module 221 is 310 nF, the capacitance value C222 of the second capacitor module 222 is 310 nF, and the capacitance value C223 of the third capacitor module 223 is 170 nF.

[0198] Optionally, the first impedance matching network 22 and the second impedance matching network 16 can also be implemented by adjustable capacitors, adjustable inductors, adjustable resistors, etc. At the same time, the first impedance matching network 22 and the second impedance matching network 16 are connected to the controller 131, and the adjustable capacitors, adjustable inductors, adjustable resistors, etc. are regulated by the controller 131 according to the above correspondence, so that there is no need to increase or decrease the number of capacitors in the first impedance matching network 22, so that the wireless power receiving end 2 can be adapted to vehicles with chassis of different heights, thereby saving vehicle space, improving user experience, and being adapted to different vehicles, with high universality.

[0199] For example, see Fig.11 . Fig.11 FIG. 1 is an equivalent circuit diagram of a vehicle charging system in an embodiment of the present invention in a wired charging state. Fig.11 As shown, after the controller 131 obtains the charging information, the charging information includes at least one wired charging signal. The controller 131 controls the first sub-controlled switches S11 and S12 of the first controlled switch 121 in the controlled switch group 12 to turn on, and controls the second sub-controlled switches S21 and S22 in the second controlled switch 122 to turn off, so that the multiplexing circuit 13 is connected to the wired charging circuit 11 for wired charging.

[0200] For another example, you can refer to Fig.12 . Fig.12 FIG. 1 is an equivalent circuit diagram of a vehicle charging system in a wireless charging state according to an embodiment of the present invention. Fig.12As shown, after the controller 131 obtains the charging information, the charging information includes the wireless charging signal, and the location information transmitted by the locator 24 indicates that the wireless power receiving end 2 and the wireless power transmitting end meet the predetermined location condition. The controller 131 controls the first sub-controlled switches S11 and S12 of the first controlled switch 121 in the controlled switch group 12 to be turned off, and controls the second sub-controlled switches S21 and S22 in the second controlled switch 122 to be turned on, so that the multiplexing circuit 13 is connected to the wireless power receiving end 2 for wireless charging.

[0201] The embodiment of the present invention integrates the wired charging circuit, the multiplexing circuit and the controlled switch group to obtain an integrated circuit, connects the integrated circuit to the wireless power receiving end, obtains charging information through the controller in the multiplexing circuit, and if the charging information includes a wired charging signal, controls the controlled switch group so that the wired charging circuit is connected to the multiplexing circuit for wired charging; if the charging information includes a wireless charging signal, controls the controlled switch group so that the wireless power receiving end is connected to the multiplexing circuit for wireless charging. In this way, wired charging and wireless charging of the vehicle can be realized, while ensuring charging efficiency and charging safety, saving vehicle space, improving user experience, and being adaptable to different vehicles, with high universality.

[0202] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vehicle charging system, characterized in that: The vehicle charging system comprises: A wireless power receiving end, comprising a receiving coil and a first impedance matching network; An integrated circuit includes a wired charging circuit, a multiplexing circuit and a controlled switch group, wherein the multiplexing circuit includes a controller, and the multiplexing circuit includes a rectifier circuit; The controller is configured to obtain charging information, and control the controlled switch group according to the charging information so that the wired charging circuit is connected to the multiplexing circuit for wired charging, or the wireless power receiving end is connected to the multiplexing circuit for wireless charging; Wherein, the integrated circuit further includes: a second impedance matching network, connected to the first impedance matching network, and configured to perform impedance transformation on the output impedance of the receiving coil; Wherein, the controller is used to control the controlled switch group so that the rectifier circuit is conductively connected to the second impedance matching network; Wherein, the first impedance matching network comprises: A first capacitor module, comprising a plurality of first capacitor sub-modules connected in series, wherein the first capacitor module is connected between one side of the receiving coil and the second impedance matching network; A second capacitor module, comprising a plurality of second capacitor sub-modules connected in series, wherein the second capacitor module is connected between the other side of the receiving coil and the second impedance matching network; a third capacitor module, one end of the third capacitor module being connected to a node between the first capacitor module and the second impedance matching network, and the other end of the third capacitor module being connected to a node between the second capacitor module and the second impedance matching network; Wherein, the second impedance matching network comprises: A first inductor connected between the first capacitor module and the controlled switch group; The second inductor is connected between the second capacitor module and the controlled switch group.

2. The vehicle charging system according to claim 1, characterized in that: The controller is further configured to control the controlled switch group so that the multiplexing circuit is conductively connected to the wired charging circuit in response to the charging information including at least one wired charging signal.

3. The vehicle charging system according to claim 1, characterized in that: The wireless power receiving end comprises: a receiving coil configured to wirelessly acquire an alternating current signal transmitted by the wireless power transmitting end for transmission to the multiplexing circuit; a locator, connected to the controller, and configured to obtain location information of the wireless power receiving end and the wireless power transmitting end, so as to transmit the location information to the controller; The controller is further configured to control the controlled switch group so that the multiplexing circuit is conductively connected to the wireless power receiving end in response to the charging information including a wireless charging signal and the position information indicating that the wireless power receiving end and the wireless power transmitting end meet a predetermined position condition.

4. The vehicle charging system according to claim 1, characterized in that: The controller is further configured to control switching the charging state of the vehicle charging system to a wired charging state in response to the vehicle charging system being in a wireless charging state and the currently acquired charging information including at least one wired charging signal.

5. The vehicle charging system according to claim 1, characterized in that: The wired charging circuit comprises: The first filter is configured to obtain an AC power signal to be processed transmitted by the power supply device, and filter the AC power signal to be processed to obtain a filtered signal.

6. The vehicle charging system according to claim 5, characterized in that: The wired charging circuit also includes: The power factor correction circuit is connected to the first filter and is configured to perform power factor correction on the first filtered signal to obtain a correction signal, and convert the correction signal into a first direct current signal.

7. The vehicle charging system according to claim 6, characterized in that: The wired charging circuit also includes: The inverter circuit is connected to the power factor correction circuit and is configured to isolate the first DC power signal and convert the isolated first DC power signal into an AC power signal to be regulated.

8. The vehicle charging system according to claim 7, characterized in that: The wired charging circuit also includes: The isolation transformer comprises a primary winding and a secondary winding, wherein the primary winding is connected to the inverter circuit, and the secondary winding is connected to the multiplexing circuit, and is configured to perform voltage regulation on the AC power signal to be regulated to obtain a processed AC power signal for transmission to the multiplexing circuit.

9. The vehicle charging system according to claim 8, characterized in that: The controlled switch group includes a first controlled switch and a second controlled switch. The rectifier circuit is conductively connected to the isolation transformer through the first controlled switch, or is conductively connected to the wireless power receiving end through the second controlled switch. The rectifier circuit is configured to convert the AC power signal transmitted by the isolation transformer or the wireless power receiving end into a second DC power signal.

10. The vehicle charging system according to claim 9, characterized in that: The vehicle charging system further includes a charging control system, the charging control system includes a power distributor and / or a battery manager, and the multiplexing circuit further includes: The second filter is connected to the rectifier circuit and the charging control system, and is configured to filter the second DC signal to obtain an output signal so as to charge the vehicle through the charging control system.

11. The vehicle charging system according to claim 6, characterized in that: The integrated circuit further includes: A power factor correction driving circuit connected to the power factor correction circuit and the controller; Wherein, the controller is further configured to control the power factor correction circuit through the power factor correction drive circuit to perform power factor correction on the first filtered signal to obtain a correction signal, and convert the correction signal into the first direct current signal.

12. The vehicle charging system according to claim 7, characterized in that: The integrated circuit further includes: An inverter drive circuit connected to the controller and the inverter circuit; The controller is further configured to control the inverter circuit through the inverter drive circuit to isolate the first DC signal, and convert the isolated first DC signal into an AC signal to be regulated.

13. The vehicle charging system according to claim 9, characterized in that: The multiplexing circuit also includes: A rectifier drive circuit connected to the controller and the rectifier circuit; Wherein, the controller is further configured to control the rectifier circuit through the rectifier drive circuit to convert the AC power signal into a second DC power signal.

14. The vehicle charging system according to claim 10, characterized in that: The multiplexing circuit also includes: The detection circuit is connected to the controller and the second filter and is configured to obtain detection information including voltage information and current information for transmission to the controller.

15. The vehicle charging system according to claim 14, characterized in that: The multiplexing circuit also includes: The protection circuit is connected to the controller and the detection circuit, and is configured to output a protection signal to protect the second filter in response to the detection information indicating an overload or a short circuit.

16. A vehicle charging method, characterized in that: The vehicle charging method comprises: Get charging information; Controlling the controlled switch group according to the charging information so that the wired charging circuit in the vehicle charging system integrated circuit is connected to the multiplexing circuit for wired charging, or so that the wireless power receiving end is connected to the multiplexing circuit for wireless charging, wherein the multiplexing circuit includes a rectifier circuit; Wherein, the wireless power receiving end includes a receiving coil and a first impedance matching network; Wherein, the integrated circuit further includes: Controller; a second impedance matching network, connected to the first impedance matching network, and configured to perform impedance transformation on the output impedance of the receiving coil; Wherein, the controller is used to control the controlled switch group so that the rectifier circuit is conductively connected to the second impedance matching network; Wherein, the first impedance matching network comprises: A first capacitor module, comprising a plurality of first capacitor sub-modules connected in series, wherein the first capacitor module is connected between one side of the receiving coil and the second impedance matching network; A second capacitor module, comprising a plurality of second capacitor sub-modules connected in series, wherein the second capacitor module is connected between the other side of the receiving coil and the second impedance matching network; a third capacitor module, one end of the third capacitor module being connected to a node between the first capacitor module and the second impedance matching network, and the other end of the third capacitor module being connected to a node between the second capacitor module and the second impedance matching network; Wherein, the second impedance matching network comprises: A first inductor connected between the first capacitor module and the controlled switch group; The second inductor is connected between the second capacitor module and the controlled switch group.

17. The vehicle charging method according to claim 16, characterized in that: The controlling the controlled switch group according to the charging information so that the wired charging circuit in the integrated circuit is connected to the multiplexing circuit for wired charging includes: In response to the charging information including at least one wired charging signal, the controlled switch group is controlled so that the multiplexing circuit is conductively connected to the wired charging circuit.

18. The vehicle charging method according to claim 16, characterized in that: The wireless power receiving end includes a locator and a receiving coil, and the controlling of the controlled switch group according to the charging information so that the wireless power receiving end is connected to the multiplexing circuit for wireless charging includes: In response to the charging information including a wireless charging signal, and the position information of the wireless power receiving end and the wireless power transmitting end obtained by the locator meets the predetermined position condition, the controlled switch group is controlled so that the wireless power receiving end is connected to the multiplexing circuit, and the AC power signal transmitted by the wireless power transmitting end is wirelessly obtained through the receiving coil for transmission to the multiplexing circuit.

19. The vehicle charging method according to claim 16, characterized in that: The controlling the controlled switch group according to the charging information so that the wired charging circuit in the integrated circuit is connected to the multiplexing circuit for wired charging includes: In response to the vehicle charging system being in a wireless charging state and the currently acquired charging information including at least one wired charging signal, the charging state of the vehicle charging system is controlled to be switched to a wired charging state.

20. A vehicle, characterized in that: The vehicle comprises: the vehicle body; and A vehicle charging system as claimed in any one of claims 1 to 15.

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