Adapter, charging system and charging method

Abstract

The embodiment of the invention provides an adapter, a charging system and a charging method. The adapter comprises a charging module, a first shell and a second shell, wherein the first shell and the second shell are rotationally connected. Wherein the charging module comprises a rectifying unit and a wireless charging unit, the wireless charging unit comprises a transmitting end coil assembly and a receiving end coil assembly, the rectifying unit and the transmitting end coil assembly are located in the first shell, and the receiving end coil assembly is located in the second shell. The rectification unit is used for receiving alternating current from an external power supply, converting the alternating current into first direct current and transmitting the first direct current to the transmitting end coil assembly. When the adapter is in the folded state, the transmitting end coil assembly can transmit the first direct current output by the rectifying unit to the receiving end coil assembly through electromagnetic induction, and then the first direct current is provided for a load. The adapter provided by the embodiment of the invention not only has the characteristic of small occupied space, but also can meet the requirement of higher charging power.

Description

Adapter, charging system and charging method Technical Field

[0001] Embodiments of the present application relate to the field of charging technology, and more specifically, to an adapter, a charging system, and a charging method. Background Art

[0002] Adapters, as power conversion devices for small portable electronic devices and appliances, are widely used in electronic devices such as smartphones, tablets, and laptops. As the charging power of adapters increases, they require more electronic components capable of withstanding higher power and achieving higher-precision control, which in turn increases the size of the adapters.

[0003] However, in actual use, adapters are typically plugged into sockets. Since current sockets often use multi-hole or double-row sockets, with adjacent sockets close together, larger adapters can easily block unused sockets when plugged in, reducing socket utilization and making the adapter less convenient to use. Furthermore, as users demand ever-higher portability for electronic devices, adapters, as supporting equipment, are also trending towards miniaturization.

[0004] Therefore, it is necessary to provide an adapter that has the characteristics of taking up a small space while meeting higher charging power requirements.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide an adapter, a charging system, and a charging method. The adapter can not only take up a small space but also meet higher charging power requirements.

[0007] In a first aspect, an adapter is provided, which includes: a first shell, a second shell and a charging module; the first shell and the second shell are rotatably connected; the charging module includes a rectifier unit and a wireless charging unit, the rectifier unit is arranged in the first shell, the wireless charging unit includes a transmitting end coil assembly and a receiving end coil assembly, the transmitting end coil assembly is arranged in the first shell, the transmitting end coil assembly is electrically connected to the output end of the rectifier unit, and the receiving end coil assembly is arranged in the second shell; the rectifier unit is used to receive alternating current from an external power supply, convert the alternating current into a first direct current and transmit it to the transmitting end coil assembly; the transmitting end coil assembly is used to convert the first direct current into electromagnetic waves, and the receiving end coil assembly is used to convert the electromagnetic waves into a second direct current and transmit it to a load.

[0008] It is understood that the first shell and the second shell are rotatably connected to each other, so that the adapter can have a folded state and an unfolded state. When the adapter is transformed between the folded state and the unfolded state, the first shell and the second shell can have a first combined state.

[0009] The first housing and the second housing being in the first combined state may mean that the adapter is in a folded state, and the transmitting coil assembly in the first housing and the receiving coil assembly in the second housing are coupled via electromagnetic induction. Thus, a coupled electromagnetic field is generated in the space between the transmitting coil assembly and the receiving coil assembly. The transmitting coil assembly utilizes this coupled electromagnetic field to wirelessly transmit the DC power output by the rectifier unit in the first housing to the receiving coil assembly in the second housing, thereby delivering the DC power to the load.

[0010] It is also understood that in the embodiment of the present application, the adapter can transmit direct current to the load via the power cord for charging the load. In other words, the receiving-end coil assembly transmits direct current to the load in a wired transmission manner.

[0011] In the adapter provided in the embodiment of the present application, by respectively arranging the transmitting coil assembly and the receiving coil assembly of the wireless charging unit in two rotatably connected shells, the adapter can transmit the DC power output by the rectifier unit to the receiving coil assembly by wireless transmission in a folded state, so that the load can be charged through the receiving coil assembly. This can reduce the space occupied by the adapter when in use, which is conducive to the miniaturization of the adapter. When the adapter is plugged into the socket, the smaller occupied space can avoid the adapter blocking unused jacks, thereby ensuring the utilization rate of the socket jacks and improving the convenience of use of the adapter. In addition, the transmitting coil assembly and the receiving coil assembly are separately arranged in two shells, which can avoid the impact of the folding of the shell on the volume of the transmitting coil assembly and the receiving coil assembly, thereby ensuring the output power of the adapter, which is conducive to enabling the adapter to meet higher charging power requirements.

[0012] In combination with the first aspect, in certain implementations of the first aspect, the charging module further includes a step-down DC-DC conversion circuit, wherein the input end of the step-down DC-DC conversion circuit is electrically connected to the output end of the rectifier unit; the step-down DC-DC conversion circuit is used to convert the first DC power output by the rectifier unit into a third DC power and transmit it to the load, wherein the voltage of the third DC power is lower than the voltage of the first DC power.

[0013] It can be understood that when the adapter is transformed between the folded state and the unfolded state, the first shell and the second shell may also have a second combined state.

[0014] The first shell and the second shell being in the second combined state may mean that the adapter is in a folded state or an unfolded state, and a coupling electromagnetic field cannot be generated in the space between the transmitting coil assembly located in the first shell and the receiving coil assembly located in the second shell. In other words, the transmitting coil assembly and the receiving coil assembly cannot be coupled through electromagnetic induction. For example, when the adapter is in the folded state or the unfolded state, the transmitting coil assembly and the receiving coil assembly are not arranged relative to each other; or the distance between the transmitting coil assembly and the receiving coil assembly is large, which may result in the transmitting coil assembly and the receiving coil assembly being unable to couple through electromagnetic induction. As a result, the adapter cannot use wireless transmission to transmit the DC power output by the rectifier unit to the receiving coil assembly, and thus cannot charge the load through the receiving coil assembly.

[0015] In the adapter provided in the embodiment of the present application, a step-down DC-DC conversion circuit is provided. On the one hand, when the adapter cannot use the receiving-end coil assembly to charge the load, the adapter can further convert the DC power output by the rectifier unit into DC power suitable for the load through the step-down DC-DC conversion circuit, and transmit it to the load in a wired transmission manner to charge the load, which is beneficial to ensuring the reliability of the adapter; on the other hand, the adapter can also, in a folded state, simultaneously transmit the DC power output by the rectifier unit to the load through the receiving-end coil assembly and the step-down DC-DC conversion circuit, thereby increasing the charging power of the adapter and enabling the adapter to meet higher charging power requirements.

[0016] In combination with the first aspect, in certain implementations of the first aspect, the step-down DC-DC conversion circuit is disposed in the second shell, and the adapter also includes a first connecting wire, the first end of the first connecting wire is located in the first shell, the first end of the first connecting wire is electrically connected to the output end of the rectifier unit, and the second end of the first connecting wire is located in the second shell, and the second end of the first connecting wire is electrically connected to the input end of the step-down DC-DC conversion circuit.

[0017] It can be understood that the first connecting line may be a connecting line capable of transmitting electrical signals, for example, the first connecting line may be a cable.

[0018] In the adapter provided in the embodiments of the present application, the step-down DC-DC converter circuit can be disposed within the second housing along with the receiving-end coil assembly. The circuit is electrically connected to the rectifier unit within the first housing via a first connecting wire to receive the DC power output by the rectifier unit. This fully utilizes the space within the second housing, resulting in a simple and compact structural design and facilitating miniaturization of the adapter.

[0019] In combination with the first aspect, in certain implementations of the first aspect, the step-down DC-DC conversion circuit is disposed in the first shell, and the adapter also includes a second connecting wire, the first end of the second connecting wire is located in the first shell, the first end of the second connecting wire is electrically connected to the output end of the step-down DC-DC conversion circuit, the second end of the second connecting wire is located in the second shell, and the second end of the second connecting wire is used to be electrically connected to the load.

[0020] It can be understood that the second connecting line may be a connecting line capable of transmitting electrical signals, for example, the second connecting line may be a cable.

[0021] In the adapter provided in the embodiment of the present application, the step-down DC-DC conversion circuit can be arranged together with the transmitting end coil assembly in the first shell and electrically connected to the load through the second connecting line. This can make full use of the space in the first shell, and the structural design is simple and compact, which is conducive to the miniaturization of the adapter.

[0022] In combination with the first aspect, in certain implementations of the first aspect, the transmitting coil assembly includes a transmitting coil and a transmitting magnetic core, the step-down DC-DC conversion circuit includes a secondary coil, the transmitting coil and the secondary coil are wound around the transmitting magnetic core, the transmitting coil is electrically connected to the output end of the rectifier unit, and the secondary coil is electrically connected to the first end of the second connecting line; the transmitting coil and the secondary coil are used to step down the voltage of the first direct current output by the rectifier unit through electromagnetic induction, obtain a third direct current, and transmit it to a load.

[0023] In the adapter provided in the embodiments of the present application, the transmitter coil serves as the primary coil in the step-down DC-DC converter circuit. This coil is coupled to the secondary coil in the step-down DC-DC converter circuit via the transmitter core, forming a transformer in the step-down DC-DC converter circuit. This eliminates the need for a separate primary coil in the step-down DC-DC converter circuit, reducing the number of electronic components in the adapter and contributing to its miniaturization.

[0024] In combination with the first aspect, in certain implementations of the first aspect, the adapter further includes a connecting mechanism; the connecting mechanism is located between the first shell and the second shell, and the connecting mechanism is rotatably connected to the first shell and the second shell respectively; the transformer unit includes a primary coil, a secondary coil and a first magnetic core; the first magnetic core is arranged at the connecting mechanism, the primary coil and the secondary coil are wound around the first magnetic core, the primary coil is electrically connected to the output end of the rectifier unit, and the secondary coil is used to electrically connect to the load; the primary coil and the secondary coil are used to step down the voltage of the first direct current output by the rectifier unit through electromagnetic induction, obtain a third direct current and transmit it to the load.

[0025] It is understood that the first shell and the second shell can be rotatably connected by a connecting structure to switch between the first and second combined states. The connecting mechanism can be, for example, a rotating shaft or a cable.

[0026] In the adapter provided in the embodiment of the present application, the magnetic core in the step-down DC-DC conversion circuit is set at the connecting mechanism to fully utilize the space of the connecting mechanism, thereby reducing the space occupied by the magnetic core in the first shell or the second shell, so that more electronic components can be accommodated in the first shell or the second shell, which is beneficial to improving the charging power of the adapter.

[0027] In combination with the first aspect, in certain implementations of the first aspect, the adapter further includes an input interface and an output interface; the input interface is arranged on the first shell, the input interface is electrically connected to the input end of the rectifier unit, and the input interface is used to be electrically connected to an external power supply; the output interface is arranged on the second shell, the output interface is electrically connected to the receiving end coil assembly, and the output interface is used to be electrically connected to the load.

[0028] The input interface may be, for example, a plug interface that can be plugged into a socket, thereby obtaining AC power input from an external power source through the socket. The output interface may be electrically connected to a load through a power cord.

[0029] In the adapter provided in the embodiment of the present application, by setting the input interface and the rectifier unit in the same shell, and setting the receiving end coil assembly and the output interface in the same shell, the complexity of the line connection between the input interface and the rectifier unit, and the receiving end coil assembly and the output interface can be reduced, which is beneficial to the design of the circuit structure in the adapter.

[0030] In combination with the first aspect, in certain implementations of the first aspect, the rectifier unit includes a rectifier conversion circuit and a first DC-DC conversion circuit; the output end of the rectifier unit is electrically connected to the input end of the first DC-DC conversion circuit, and the output end of the first DC-DC conversion circuit is electrically connected to the transmitting coil assembly; the rectifier conversion circuit is used to receive alternating current from an external power supply, convert the alternating current into a fourth direct current, and transmit it to the first DC-DC conversion circuit; the first DC-DC conversion circuit is used to convert the fourth direct current into a first direct current and transmit it to the transmitting coil assembly.

[0031] Optionally, the first DC-DC conversion circuit may be a buck-boost circuit, a boost circuit or a buck circuit.

[0032] In the adapter provided in the embodiment of the present application, the alternating current input from the external power supply can be converted and rectified by the rectification conversion circuit and the first DC-DC conversion circuit, so that the current and voltage of the first direct current output to the transmitting-end coil assembly can be more stable and smooth.

[0033] In combination with the first aspect, in certain implementations of the first aspect, the first DC-DC conversion circuit includes multiple switches, and the wireless charging unit also includes a wireless charging controller, wherein the wireless charging controller is arranged in the first shell, and the wireless charging controller is used to: receive a feedback signal sent by the receiving end coil assembly, the feedback signal is used to indicate the charging information of the load; determine a drive signal based on the feedback signal, and the drive signal is used to control the on and off of the multiple switches so that the first DC-DC conversion circuit outputs the first direct current according to the charging information.

[0034] It can be understood that the charging information of the load may include the load's requirements for charging voltage and charging current during charging; outputting the first direct current according to the charging information may mean that the peak voltage / average voltage and peak current / average current when charging the load with the first direct current both meet the load's requirements for charging voltage and charging current during charging.

[0035] In the adapter provided in the embodiment of the present application, the wireless charging controller can adjust the first direct current output by the first DC-DC conversion circuit based on the charging information fed back by the receiving-end coil assembly to meet the charging requirements of the load, thereby improving the reliability of the adapter.

[0036] In a second aspect, a charging system is provided, which includes: an adapter and a load; wherein the adapter includes a first shell, a second shell and a charging module, the first shell and the second shell are rotatably connected, and the charging module includes a rectifier unit and a wireless charging unit; the rectifier unit is arranged in the first shell; the wireless charging unit includes a transmitting end coil assembly and a receiving end coil assembly, the transmitting end coil assembly is arranged in the first shell, the transmitting end coil assembly is electrically connected to the output end of the rectifier unit, and the receiving end coil assembly is arranged in the second shell, and the receiving end coil assembly is electrically connected to the load; the rectifier unit is used to receive alternating current from an external power supply, convert the alternating current into a first direct current and transmit it to the transmitting end coil assembly; the transmitting end coil assembly is used to convert the first direct current into electromagnetic waves, and the receiving end coil assembly is used to convert the electromagnetic waves into a second direct current and transmit it to the load.

[0037] In combination with the second aspect, in certain implementations of the second aspect, the charging module further includes a step-down DC-DC conversion circuit, wherein the input end of the step-down DC-DC conversion circuit is electrically connected to the output end of the rectifier unit, and the output end of the step-down DC-DC conversion circuit is electrically connected to the load; the step-down DC-DC conversion circuit is used to convert the first DC power output by the rectifier unit into a third DC power and transmit it to the load, wherein the voltage of the third DC power is lower than the voltage of the first DC power.

[0038] In combination with the second aspect, in certain implementations of the second aspect, the step-down DC-DC conversion circuit is disposed in the second shell, and the adapter also includes a first connecting wire, the first end of the first connecting wire is located in the first shell, the first end of the first connecting wire is electrically connected to the output end of the rectifier unit, and the second end of the first connecting wire is located in the second shell, and the second end of the first connecting wire is electrically connected to the input end of the step-down DC-DC conversion circuit.

[0039] In combination with the second aspect, in certain implementations of the second aspect, the step-down DC-DC conversion circuit is disposed in the first shell, and the adapter also includes a second connecting wire, the first end of the second connecting wire is located in the first shell, the first end of the second connecting wire is electrically connected to the output end of the step-down DC-DC conversion circuit, the second end of the second connecting wire is located in the second shell, and the second end of the second connecting wire is electrically connected to the load.

[0040] In combination with the second aspect, in certain implementations of the second aspect, the transmitting coil assembly includes a transmitting coil and a transmitting magnetic core, the step-down DC-DC conversion circuit includes a secondary coil, the transmitting coil and the secondary coil are wound around the transmitting magnetic core, the transmitting coil is electrically connected to the output end of the rectifier unit, and the secondary coil is electrically connected to the first end of the second connecting line; the transmitting coil and the secondary coil are used to step down the voltage of the first direct current output by the rectifier unit through electromagnetic induction, obtain a third direct current and transmit it to a load.

[0041] In combination with the second aspect, in certain implementations of the second aspect, the adapter further includes a connecting mechanism, the connecting mechanism being located between the first shell and the second shell, and the connecting mechanism being rotatably connected to the first shell and the second shell respectively; the step-down DC-DC conversion circuit includes a primary coil, a secondary coil and a first magnetic core, the first magnetic core being arranged at the connecting mechanism, the primary coil and the secondary coil being wound around the first magnetic core, the primary coil being electrically connected to the output end of the rectifier unit, and the secondary coil being electrically connected to the load; the primary coil and the secondary coil are used to step down the voltage of the first direct current output by the rectifier unit through electromagnetic induction, to obtain a third direct current and transmit it to the load.

[0042] In combination with the second aspect, in certain implementations of the second aspect, the adapter further includes an input interface and an output interface; the input interface is arranged on the first shell, the input interface is electrically connected to the input end of the rectifier unit, and the input interface is used to be electrically connected to an external power supply; the output interface is arranged on the second shell, and the output interface is electrically connected to the receiving end coil assembly and the load.

[0043] In combination with the second aspect, in certain implementations of the second aspect, the rectifier unit includes a rectifier conversion circuit and a first DC-DC conversion circuit; the output end of the rectifier unit is electrically connected to the input end of the first DC-DC conversion circuit, and the output end of the first DC-DC conversion circuit is electrically connected to the transmitting coil assembly; the rectifier conversion circuit is used to receive alternating current from an external power supply, convert the alternating current into a fourth direct current, and transmit it to the first DC-DC conversion circuit; the first DC-DC conversion circuit is used to convert the fourth direct current into a first direct current and transmit it to the transmitting coil assembly.

[0044] In combination with the second aspect, in certain implementations of the second aspect, the first DC-DC conversion circuit includes multiple switches, and the wireless charging unit also includes a wireless charging controller, wherein the wireless charging controller is arranged in the first shell, and the wireless charging controller is used to: receive a feedback signal sent by the receiving end coil assembly, the feedback signal is used to indicate the charging information of the load; determine a drive signal based on the feedback signal, and the drive signal is used to control the on and off of multiple switches so that the first DC-DC conversion circuit outputs a first direct current according to the charging information.

[0045] In a third aspect, a charging method is provided, which is applied to an adapter, wherein the adapter includes a first housing, a second housing, and a charging module, the charging module including a rectifier unit and a wireless charging unit, and the wireless charging unit including a transmitting coil assembly and a receiving coil assembly; wherein the first housing and the second housing are rotatably connected, the rectifier unit and the transmitting coil assembly are disposed within the first housing, the output end of the rectifier unit is electrically connected to the transmitting coil assembly, and the receiving coil assembly is disposed within the second housing;

[0046] The charging method includes: a rectifier unit receives alternating current from an external power source, converts the alternating current into a first direct current and transmits it to a transmitting-end coil assembly; the transmitting-end coil assembly converts the first direct current into electromagnetic waves, and the receiving-end coil assembly converts the electromagnetic waves into a second direct current and transmits it to a load.

[0047] In the charging method provided in the embodiment of the present application, the adapter utilizes a transmitting coil assembly and a receiving coil assembly respectively arranged in two shells, and transmits the direct current output by the rectifier unit from the transmitting coil assembly to the receiving coil assembly based on wireless transmission in a folded state, thereby charging the load through the receiving coil assembly. This can reduce the space occupied by the adapter when in use, which is conducive to the miniaturization of the adapter. When the adapter is plugged into the socket, the smaller occupied space can avoid the adapter blocking unused jacks, thereby ensuring the utilization rate of the socket jacks and improving the convenience of use of the adapter. In addition, the transmitting coil assembly and the receiving coil assembly are separately arranged in two shells, which can avoid the impact of the folding of the shell on the volume of the transmitting coil assembly and the receiving coil assembly, thereby ensuring the output power of the adapter, which is conducive to enabling the adapter to meet higher charging power requirements.

[0048] In conjunction with the third aspect, in certain implementations of the third aspect, the charging module further includes a step-down DC-DC conversion circuit, wherein an input end of the step-down DC-DC conversion circuit is electrically connected to an output end of the rectifier unit;

[0049] The charging method further includes: a step-down DC-DC conversion circuit converting the first DC power output by the rectifier unit into a third DC power, and transmitting the third DC power to a load, wherein the voltage of the third DC power is lower than the voltage of the first DC power.

[0050] In conjunction with the third aspect, in certain implementations of the third aspect, the rectifier unit includes a rectifier conversion circuit and a first DC-DC conversion circuit, the output end of the rectifier unit is electrically connected to the input end of the first DC-DC conversion circuit, and the output end of the first DC-DC conversion circuit is electrically connected to the transmitting-end coil assembly;

[0051] The rectifier unit receives alternating current from an external power source, converts the alternating current into a first direct current, and transmits the first direct current to the transmitting coil assembly, including: a rectifier conversion circuit receives alternating current from an external power source, converts the alternating current into a fourth direct current, and transmits the first direct current to the first DC-DC conversion circuit; the first DC-DC conversion circuit converts the fourth direct current into a first direct current, and transmits the first direct current to the transmitting coil assembly.

[0052] In conjunction with the third aspect, in certain implementations of the third aspect, the first DC-DC conversion circuit includes a plurality of switches, the wireless charging unit further includes a wireless charging controller, and the wireless charging controller is disposed in the first housing;

[0053] The charging method also includes: the wireless charging controller receives a feedback signal sent by the receiving end coil assembly, the feedback signal is used to indicate charging information of the load; the wireless charging controller determines a drive signal based on the feedback signal, the drive signal is used to control the on and off of multiple switches so that the first DC-DC conversion circuit outputs a first direct current based on the charging information.

[0054] Among them, the beneficial effects of the second to third aspects can be found in the relevant description of the first aspect and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] FIG1 is a schematic structural diagram of a charging system provided in an embodiment of the present application.

[0056] FIG2 is a schematic diagram of an architecture of an adapter and a socket connection provided in an embodiment of the present application.

[0057] FIG3 is a schematic diagram of the internal structure of an adapter provided in an embodiment of the present application.

[0058] FIG4 is a schematic diagram of the product form of an adapter provided by an embodiment of the present application in which the first shell and the second shell are in a first combined state.

[0059] FIG5 is a schematic diagram of the product form of an adapter provided by an embodiment of the present application in which the first shell and the second shell are in a second combined state.

[0060] FIG6 is a schematic diagram of the product form of an adapter provided by an embodiment of the present application in which the first shell and the second shell are in a second combined state.

[0061] FIG7 is a specific example diagram of a charging module inside an adapter provided in an embodiment of the present application.

[0062] FIG8 is a specific example diagram of a charging module inside an adapter provided in an embodiment of the present application.

[0063] FIG9 is a specific example diagram of a charging module inside an adapter provided in an embodiment of the present application.

[0064] FIG10 is a schematic diagram of the product form of an adapter provided in an embodiment of the present application.

[0065] FIG11 is a specific example diagram of a charging module inside an adapter provided in an embodiment of the present application.

[0066] FIG12 is a schematic diagram of the product form of an adapter provided in an embodiment of the present application.

[0067] FIG13 is a specific example diagram of a charging module inside an adapter provided in an embodiment of the present application.

[0068] FIG14 is a specific example diagram of a charging module inside an adapter provided in an embodiment of the present application.

[0069] FIG15 is a schematic diagram of the product form of an adapter provided in an embodiment of the present application.

[0070] FIG16 is a specific example diagram of a first DC-DC conversion circuit provided in an embodiment of the present application.

[0071] FIG17 is a specific example diagram of a first DC-DC conversion circuit provided in an embodiment of the present application.

[0072] FIG18 is a specific example diagram of a first DC-DC conversion circuit provided in an embodiment of the present application.

[0073] FIG19 is a specific example diagram of a first DC-DC conversion circuit provided in an embodiment of the present application.

[0074] FIG20 is a flow chart of a charging method provided in an embodiment of the present application.

[0075] FIG21 is a schematic structural diagram of a charging system provided in an embodiment of the present application.

[0076] Figure 22 is a structural diagram of another charging system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0077] To facilitate understanding, the terms involved in the embodiments of this application are first introduced.

[0078] Adapter: A device that converts voltage to power an electronic device. An adapter can also be called a charger, charger, switching power supply, or power converter.

[0079] To facilitate understanding of the embodiments of the present application, the following explanation is made before introducing the embodiments of the present application.

[0080] In the description of the embodiments of the present application, unless otherwise specified, "connection" can be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. "Connection" can be a direct connection or an indirect connection through an intermediate medium. "Electrical connection" can refer to a way of achieving electrical connection for signal transmission. The electrical connection between two electrical components can be a way of achieving signal transmission between the two electrical components through direct electrical connection or indirect electrical connection. For example, A and B are electrically connected, which can be understood as A and B being directly electrically connected, or it can be understood as A and B being indirectly electrically connected through one or more other electrical components.

[0081] The technical solution in this application will be described below with reference to the accompanying drawings.

[0082] To facilitate understanding of the adapter provided in the embodiment of the present application, the application scenarios of the adapter are first introduced below.

[0083] The adapter provided in the embodiment of the present application can be applied to a charging system in which the adapter can convert the input AC power into a stable DC charging voltage required by a load, and use the DC charging voltage to charge the load.

[0084] FIG1 exemplarily shows a structural diagram of a charging system 100 .

[0085] 1 , a charging system 100 may include a load 110 and an adapter 120 .

[0086] The load 110 may be a handheld device, an in-vehicle device, a wearable device, a computing device, or other processing device connected to a wireless modem, such as a cellular phone, a smart phone, a tablet computer, a laptop computer, a video camera, a video recorder, a camera, a smart watch, a smart wristband, etc.

[0087] The adapter 120 may include a housing 121 , an input interface 122 , an output interface 123 , and a charging module (not shown). The input interface 122 and the output interface 123 may be disposed on the housing 121 , and the charging module may be disposed in the accommodation space of the housing 121 .

[0088] The input interface 122 can be used to electrically connect to an external power source to obtain input AC power. The input interface 122 is generally a plug interface that is plugged into a socket to obtain AC power input from the external power source through the socket.

[0089] It can be understood that in the embodiment of the present application, the external power source can be a power grid, and the alternating current input from the power grid can be called mains power.

[0090] The charging module can be used to convert the alternating current obtained by the input interface 122 into stable direct current. The charging module generally includes an electrically connected alternating current-direct current (AC-DC) conversion circuit and a direct current-direct current (DC-DC) conversion circuit. Among them, the AC-DC conversion circuit can be used to convert the alternating current obtained by the input interface 122 into direct current and output it to the DC-DC conversion circuit. The DC-DC conversion circuit can be used to further convert the direct current output by the AC-DC conversion circuit into direct current suitable for the load 110 and transmit it to the output interface 123.

[0091] The output interface 123 can be electrically connected to the load 110 to transmit the DC power converted by the DC-DC converter circuit to the load 110. For example, the adapter 120 can convert the input "220V AC power" into "5V 1A DC power" for charging the load 110. In one example, referring to FIG1 , the output interface 123 can output DC power to the load 110 via the power line 130.

[0092] As described in the background technology section above, in actual use, in order to meet higher charging power requirements, more electronic components that can withstand higher power and achieve higher precision control need to be adapted in the housing 121 of the adapter 120, and the volume of the housing 121 increases accordingly.

[0093] However, current sockets mostly use multi-hole or double-row sockets, and the larger adapters are easy to block the unused sockets on the socket when in use, resulting in reduced socket utilization.

[0094] 2 exemplarily shows a schematic diagram of an architecture in which an adapter 120 is connected to a socket 20 .

[0095] Referring to Figure 2 , the outlet 20 is a double-row socket, comprising multiple socket groups 21 , each of which can be plugged into the input interface 122 of the adapter 120 . Because adjacent socket groups 21 are relatively close together, when the adapter 120 is plugged into socket group 21a , the larger housing 121 blocks the socket group 21b below it, rendering socket group 21b unusable. This results in low socket utilization on the outlet 20 and reduced user convenience for the adapter 120. Furthermore, as users increasingly demand greater portability for the load 110 , the adapter 120, as a companion device, is also trending towards miniaturization.

[0096] Therefore, it is necessary to provide an adapter that can take up a small space while meeting higher charging power requirements.

[0097] Figure 3 is a schematic diagram of the internal structure of an adapter 300 provided in an embodiment of the present application. Figures 4 to 6 are schematic diagrams of possible product forms of the adapter 300 provided in an embodiment of the present application. It should be understood that the adapter 300 provided in an embodiment of the present application may be the adapter 120.

[0098] 3 , the adapter 300 may include a first housing 310 , a second housing 320 and a charging module 330 .

[0099] The first shell 310 and the second shell 320 may both be rectangular parallelepiped, cube, or cylinder, and the thickness of the first shell 310 and the second shell 320 may be less than or equal to 15 mm.

[0100] The charging module 330 may include a rectifier unit 331 and a wireless charging unit 332, and the wireless charging unit 332 may include a transmit (TX) end coil assembly and a receive (RX) end coil assembly. Among them, the rectifier unit 331 and the TX end coil assembly can be arranged in the internal space of the first shell 310, and the output end of the rectifier unit 331 can be electrically connected to the TX end coil assembly. For example, the output end of the rectifier unit 331 can be electrically connected to the first end of the TX end coil assembly (i.e., the upper end of the TX end coil assembly shown in Figure 3), and the second end of the TX end coil assembly (i.e., the lower end of the TX end coil assembly shown in Figure 3) can be grounded. The RX end coil assembly can be arranged in the internal space of the second shell 320.

[0101] The rectifier unit 332 can receive AC power from an external power source, convert the AC power into a first DC power, and transmit it to the TX-end coil assembly. The TX-end coil assembly can convert the first DC power output by the rectifier unit 332 into electromagnetic waves, and the RX-end coil assembly can convert the electromagnetic waves into a second DC power and transmit it to the load to charge the load.

[0102] In a specific implementation, the first housing 310 and the second housing 320 can be rotatably connected so that the adapter 300 has a folded state and an unfolded state. When the adapter transforms between the folded state and the unfolded state, the first housing 310 and the second housing 320 can have a first combined state and a second combined state.

[0103] In some embodiments, referring to Figures 4 and 5 , the adapter 300 may further include a connecting mechanism 360. The connecting mechanism 360 may be located between the first housing 310 and the second housing 320 and rotatably connected to the first housing 310 and the second housing 320. The connecting mechanism 360 allows the first housing 310 and the second housing 320 to move closer to or further from each other, allowing the adapter 300 to be folded or unfolded, thereby allowing the first housing 310 and the second housing 320 to have a first combined state and a second combined state.

[0104] Exemplarily, the connection mechanism 360 may be a rotating shaft mechanism, a cable, or other mechanisms capable of achieving a rotational connection between the first shell 310 and the second shell 320 . The following description will take the connection mechanism 360 as an example of a rotation mechanism.

[0105] In the adapter 300 shown in FIG4 , the first shell 310 and the second shell 320 are currently in a first combined state. In the first combined state, the adapter 300 is folded, and the TX end coil assembly located in the first shell 310 and the RX end coil assembly located in the second shell 320 can be relatively aligned, and the spacing distance d1 between the TX end coil assembly and the RX end coil assembly is small, so that the TX end coil assembly and the RX end coil assembly can be coupled by electromagnetic induction. At this time, a coupled electromagnetic field can be generated in the spacing space between the TX end coil assembly and the RX end coil assembly. The TX end coil assembly can use this coupled electromagnetic field to wirelessly transmit the direct current output by the rectifier unit 331 in the first shell 310 to the RX end coil assembly in the second shell 310, and then the RX end coil assembly can transmit it to the load.

[0106] It should be noted that, in the embodiment of the present application, the adapter 300 can transmit direct current to the load via the power line to charge the load. That is, the RX end coil assembly transmits direct current to the load in a wired transmission manner.

[0107] It should also be noted that, in the embodiment of the present application, the first shell 310 and the second shell 320 being in the first combination state may refer to the connection state of the first shell 310 and the second shell 320 when the adapter 300 is in a folded state and the TX end coil assembly and the RX end coil assembly can be coupled by electromagnetic induction.

[0108] It will be appreciated that in the embodiment of the present application, in the first assembled state, the angle between the first housing 310 and the second housing 320 only needs to be large enough to allow the adapter 300 to be in the folded state and for the TX-end coil assembly within the first housing 310 and the RX-end coil assembly within the second housing 320 to couple via electromagnetic induction. In one example, in the first assembled state, the angle between the first housing 310 and the second housing 320 can be approximately 10°, 20°, or 45°.

[0109] In the adapter 300 shown in FIG5 , the first housing 310 and the second housing 320 are currently in a second combined state. In this second combined state, the adapter 300 is folded, and the angle between the first housing 310 and the second housing 320 is approximately 90°. At this point, the TX-end coil assembly within the first housing 310 and the RX-end coil assembly within the second housing 320 are not positioned relative to each other, and the separation distance d1 between the TX-end coil assembly and the RX-end coil assembly is large. This prevents the TX-end coil assembly and the RX-end coil assembly from coupling via electromagnetic induction, and thus the adapter 300 cannot use the TX-end coil assembly and the RX-end coil assembly to charge the load.

[0110] In the adapter 300 shown in FIG6 , the first housing 310 and the second housing 320 are currently in a second combined state. In this combined state, the adapter 300 is unfolded, and the angle between the first housing 310 and the second housing 320 is approximately 180°. At this point, the TX-end coil assembly within the first housing 310 and the RX-end coil assembly within the second housing 320 are not positioned relative to each other. This prevents the TX-end coil assembly and the RX-end coil assembly from coupling via electromagnetic induction, and thus prevents the adapter 300 from using the TX-end coil assembly and the RX-end coil assembly to charge the load.

[0111] It should be noted that, in the embodiment of the present application, the first shell 310 and the second shell 320 being in the second combined state may refer to the connection state of the first shell 310 and the second shell 320 when the adapter is in a folded state or an unfolded state and the TX end coil assembly and the RX end coil assembly cannot be coupled by electromagnetic induction.

[0112] In an embodiment of the present application, by respectively arranging the TX end coil assembly and the RX end coil assembly of the wireless charging unit 332 in two rotatably connected housings, the adapter 300 can transmit the DC power output by the rectifier unit to the receiving end coil assembly by wireless transmission in a folded state, so that the load can be charged through the RX end coil assembly. This can reduce the space occupied by the adapter 300 when in use, which is conducive to the miniaturization of the adapter 300. When the adapter 300 is plugged into the socket, the smaller occupied space can prevent the adapter 300 from blocking unused jacks, thereby ensuring the utilization rate of the socket jacks, which is conducive to improving the convenience of use of the adapter 300.

[0113] In addition, most existing adapters use a DC-DC conversion circuit to charge the load. In the transformer of the DC-DC conversion circuit, the primary coil and the secondary coil are generally wound on a closed magnetic core. When the two shells of the adapter are folded, in order to ensure that the closed magnetic core can work normally, the closed magnetic core is often set in a separate shell, resulting in a reduction in the volume of the closed magnetic core, thereby affecting the charging power of the adapter. In the embodiment of the present application, by respectively arranging the TX end coil assembly and the RX end coil assembly in two shells, it is beneficial to avoid the impact of the shell folding on the volume of the magnetic cores in the TX end coil assembly and the RX end coil assembly, so as to ensure the output power of the adapter 300, which is beneficial for the adapter 300 to meet higher charging power requirements.

[0114] In some embodiments, in conjunction with Figures 3 to 6, the adapter 300 may further include an input interface 340 and an output interface 350. The input interface 340 may be provided on the first housing 310 and electrically connected to the input end of the rectifier unit 332. The input interface 340 may be used to electrically connect to an external power source so that the rectifier unit 332 receives the AC power outputted by the external power source through the input interface 340. As shown in Figures 4 to 6, the input interface 340 may be, for example, a plug interface that may be plugged into a socket to receive 220V AC power inputted by the external power source through the socket. The output interface 350 may be provided on the second housing 320 and electrically connected to the first end of the RX end coil assembly (i.e., the upper end of the RX end coil assembly shown in Figure 3). The output interface 350 may be used to electrically connect to a load so that the RX end coil assembly transmits the second DC power to the load through the output interface 350. The output interface 350 may be electrically connected to the load, for example, via a power cord.

[0115] In some other embodiments, the input interface 340 may also be provided on the second housing 320 , and the output interface 350 may be provided on the first housing 310 .

[0116] It can be understood that compared to setting the input interface 340 on the second shell 320 and the output interface 310 on the first shell 310, by setting the input interface 340 and the rectifier unit 331 together on the first shell 310, and setting the output interface 350 and the RX end coil assembly together on the second shell 320, the complexity of the line connection between the input interface 340 and the rectifier unit 331, and the RX end coil assembly and the output interface 350 can be reduced, which is more conducive to the design of the circuit structure in the adapter.

[0117] FIG. 7 is a specific example diagram of the charging module 330 inside the adapter 300 shown in FIG. 3 provided in an embodiment of the present application.

[0118] Referring to FIG7 , in some embodiments, the rectifier unit 331 may include a rectifier conversion circuit 3311 and a first DC-DC converter circuit 3312. The input end of the rectifier conversion circuit 3311 may serve as the input end of the rectifier unit 331 and be electrically connected to the input interface 340. The output end of the rectifier conversion circuit 3311 may be electrically connected to the input end of the first DC-DC converter circuit 3312. The output end of the first DC-DC converter circuit 3312 may serve as the output end of the rectifier unit 331 and be electrically connected to the first end of the TX-end coil assembly (i.e., the upper end of the TX-end coil assembly shown in FIG7 ).

[0119] The rectifier and converter circuit 3311 can be configured to receive alternating current (AC) from an external power source, convert the AC into a fourth DC, and transmit the DC to the first DC-DC converter circuit 3312. The first DC-DC converter circuit 3322 can be configured to convert the fourth DC into a first DC, and transmit the first DC to the TX-end coil assembly.

[0120] In some embodiments, the wireless charging unit 332 may further include a wireless charging controller 3321, and the first DC-DC conversion circuit 3312 may include multiple switches. The wireless charging controller 3321 may be disposed within the first housing 310. The wireless charging controller 3321 may be configured to receive a feedback signal sent by the RX end coil assembly, which may be used to indicate charging information of the load. The wireless charging controller 3322 may also be configured to determine a drive signal based on the feedback signal, which may be used to control the on / off switching of multiple switches in the first DC-DC conversion circuit 3312, so that the first DC-DC conversion circuit 3312 outputs a first direct current based on the charging information.

[0121] It is understood that the charging information of the load may include the load's requirements for charging voltage and charging current during charging. Outputting the first DC power according to the charging information may mean that the peak voltage / average voltage and peak current / average current when charging the load with the first DC power all meet the load's requirements for charging voltage and charging current during charging.

[0122] It is also understood that the switch in the embodiment of the present application may refer to one or more of various types of switch tubes, such as a metal oxide semiconductor field effect transistor (MOSFET), a bipolar junction transistor (BJT), an insulated gate bipolar transistor (IGBT), and a silicon carbide (SiC) transistor. The packaging form of each switch tube can be a single-tube package or a multi-tube package.

[0123] In a specific implementation, the wireless charging controller 3321 can control the connection with the TX end coil assembly and the first DC-DC conversion circuit 3312. When the first shell 310 and the second shell 320 are in the first combination state, the TX end coil assembly and the RX end coil assembly can achieve communication connection through electromagnetic coupling. Thus, when the RX end coil assembly and the load are electrically connected, the RX end coil assembly can generate a feedback signal based on the charging information of the load and send the feedback signal to the TX end coil assembly. The TX end coil assembly can send the feedback signal to the wireless charging controller 3321, so that the wireless charging controller 3322 generates the above-mentioned drive signal. Furthermore, the wireless charging controller 3321 can send the drive signal to the first DC-DC conversion circuit 3312, adjust the first direct current output by the first DC-DC conversion circuit 3312 to meet the charging requirements of the load, thereby improving the reliability of the adapter 300.

[0124] Continuing with FIG. 7 , in some embodiments, the wireless charging unit 332 may further include a switching circuit 3322 , which may include multiple switching transistors. The switching circuit 3322 may be electrically connected between the output terminal of the first DC-DC converter circuit 3312 and the TX-end coil assembly. A wireless charging controller 3321 may be connected to the switching circuit 3322 . The wireless charging controller 3321 may be configured to control the on / off switching of the multiple switching transistors in the switching circuit 3322 to form a current path between the first DC-DC converter circuit 3312 and the TX-end coil assembly.

[0125] In one possible example, referring to FIG7 , the switching circuit 3322 may include a first switching arm and a second switching arm. The first switching arm includes a switching transistor S1 and a switching transistor S2 connected in series, with the midpoint of the first arm being node A. The second arm includes a switching transistor S3 and a switching transistor S4 connected in series, with the midpoint of the second arm being node B. The bridge arm connection points of the switching circuit 3322 are node C and node D, and the first switching arm and the second switching arm may be connected in parallel between node C and node D. Specifically, the switching transistors S1 and S3 may be electrically connected to node C, respectively. The switching transistors S2 and S4 may be electrically connected to node D, respectively. Node A may be electrically connected to the first end of the TX-end coil assembly (i.e., the upper end of the TX-end coil assembly shown in FIG7 ), node B may be electrically connected to the second end of the TX-end coil assembly (i.e., the lower end of the TX-end coil assembly shown in FIG7 ), node C may be electrically connected to the output end of the first DC-DC conversion circuit 3312, and node D may be grounded.

[0126] It is understandable that the specific implementation of the wireless charging controller 3321 provided in the embodiment of the present application can be achieved through a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a micro controller unit (MCU), a programmable logic device (PLD) or other integrated chips.

[0127] In some embodiments, the wireless charging unit 332 may further include a diode circuit 3323. The diode circuit 3323 may be electrically connected between the RX-end coil assembly and the output interface 350. The diode circuit 3323 may be used to rectify the second direct current output by the RX-end coil assembly.

[0128] In one possible example, referring to FIG7 , the diode circuit 3323 may include a first diode bridge arm and a second diode bridge arm. The first diode bridge arm includes a diode D1 and a diode D2 connected in series, with the midpoint of the first diode bridge arm being a node H. The second diode bridge arm includes a diode D3 and a diode D4 connected in series, with the midpoint of the second diode bridge arm being a node E. The bridge arm connection points of the diode circuit 3323 are nodes F and G, with the first diode bridge arm and the second diode bridge arm connected in parallel between nodes F and G. Specifically, diode D1 and diode D3 may be electrically connected to node F, respectively, and diode D2 and diode D4 may be electrically connected to node G, respectively. Node H may be electrically connected to the first end of the RX end coil assembly (i.e., the upper end of the RX end coil assembly shown in FIG7 ), node E may be electrically connected to the second end of the RX end coil assembly (i.e., the lower end of the RX end coil assembly shown in FIG7 ), and node F and node G may be electrically connected to the output port interface 350.

[0129] In some embodiments, referring to FIG7 , an output capacitor C1 may be electrically connected between the diode circuit 3323 and the output interface 350. The first end of the output capacitor C1 (i.e., the upper end of the output capacitor C1 shown in FIG7 ) may be electrically connected to node F of the diode circuit 3323, and the second end of the output capacitor C1 (i.e., the lower end of the output capacitor C1 shown in FIG7 ) may be electrically connected to node G of the diode circuit 3323. The output capacitor C1 may rectify and filter the DC power output by the diode circuit 3323, thereby making the current and voltage of the DC power delivered by the diode circuit 3323 to the load more stable and smooth.

[0130] Continuing with FIG. 7 , in some embodiments, the charging module 340 may further include an electromagnetic interference (EMI) filter circuit 333. The input end of the EMI filter circuit 333 may be electrically connected to the input interface 340, and the output end of the EMI filter circuit may be electrically connected to the input end of the rectifier unit 331, for example, the input end of the rectifier conversion circuit 3311. The EMI filter circuit 333 may be used to filter the alternating current (AC) power delivered to the rectifier unit 331.

[0131] FIG8 is a specific example diagram of a charging module 330 inside another example of an adapter 300 provided in an embodiment of the present application.

[0132] It should be understood that the adapter 300 shown in FIG. 8 may include most of the technical features of the adapter 300 shown in FIG. 7 . The following mainly describes the differences between the two, and most of the same contents between the two will not be repeated.

[0133] Referring to FIG. 8 , in some embodiments, the charging module 330 may further include a step-down DC-DC converter circuit 334. The input of the step-down DC-DC converter circuit 334 may be electrically connected to the output of the rectifier unit 332, for example, the output of the DC-DC converter circuit 3312. The output of the step-down DC-DC converter circuit 334 may be electrically connected to the output interface 350. The step-down DC-DC converter circuit 334 may be configured to convert the first DC power output by the rectifier unit 331 into a third DC power having a voltage lower than that of the first DC power, and then transmit the third DC power to the load.

[0134] For example, the rectifier conversion circuit 3311 can convert the 220V AC power input from the external power supply into 48V DC power, the first DC-DC conversion circuit 3312 can convert the 48V AC power into 12V DC power, and the step-down DC-DC conversion circuit 334 can further convert the 12V DC power into 3.8V DC power suitable for the load, and transmit it to the load through the output interface 350 in a wired transmission manner.

[0135] In the embodiment of the present application, by providing a step-down DC-DC conversion circuit 334, on the one hand, when the first shell 310 and the second shell 320 are in the second combination state, that is, when the adapter 300 cannot use the RX end coil assembly to charge the load, the adapter 300 can further convert the DC power output by the rectifier unit 331 into DC power suitable for the load through the step-down DC-DC conversion circuit 334, and transmit it to the load in a wired transmission manner to charge the load, thereby facilitating ensuring the reliability of the adapter 300; on the other hand, when the first shell 310 and the second shell 320 are in the first combination state, that is, when the adapter 300 is in the folded state, the adapter 300 can simultaneously transmit the DC power output by the rectifier unit 331 to the load through the RX end coil assembly and the step-down DC-DC conversion circuit 334, thereby increasing the charging power of the adapter 300 and enabling the adapter 300 to meet higher charging power requirements.

[0136] It can be understood that, according to actual production and design requirements, the step-down DC-DC conversion circuit 334 can be located in the first shell 310, or in the second shell 320, or part of the step-down DC-DC conversion circuit 334 can be located between the first shell 310 and the second shell 320.

[0137] The specific location of the step-down DC-DC converter circuit 334 in the adapter 300 will be further described below with reference to the accompanying drawings.

[0138] Fig. 9 is a diagram showing a specific example of a charging module 330 inside an adapter 300 according to an embodiment of the present application. Fig. 10 is a diagram showing a possible product form of the adapter 300 shown in Fig. 9 according to an embodiment of the present application.

[0139] It should be understood that the adapter shown in FIG. 9 includes most of the technical features of the adapter 300 shown in FIG. 8 . The following mainly describes the differences between the two, and most of the same contents are not repeated.

[0140] 9 and 10 , in some embodiments, the step-down DC-DC converter circuit 334 may be disposed within the second housing 320. The charging module 340 may further include a first connection line 335 and a second connection line 336. The step-down DC-DC converter circuit 334 may be electrically connected to the output end of the rectifier unit 332 via the first connection line 335 and to the output interface via the second connection line 336.

[0141] Specifically, the first end of the first connecting wire 335 can be located within the first housing 310 and electrically connected to the output of the rectifier unit 331, for example, to the output of the first DC-DC converter circuit 3311. The second end of the first connecting wire 335 can pass through the first housing 310, bypass the rotating mechanism 360, and extend into the second housing 320, where it can be electrically connected to the input of the step-down DC-DC converter circuit 334. The first and second ends of the second connecting wire 336 can be located within the second housing 320 and electrically connected to the output of the step-down DC-DC converter circuit 334 and the output interface 350, respectively. The first and second connecting wires 335, 336 can be connecting wires capable of transmitting electrical signals, for example, the first and second connecting wires 335, 336 can be cables.

[0142] Exemplarily, the step-down DC-DC converter circuit 334 may include a transformer and a plurality of switches (not shown in the figure). The transformer may include a primary coil L1, a secondary coil L2 and a first magnetic core (MC). The primary coil L1 and the secondary coil L2 may be wound around the first magnetic core MC. That is, the primary coil L1 and the secondary coil L2 are magnetically coupled through the first magnetic core MC. The first end of the primary coil L1 (i.e., the upper end of the primary coil L1 shown in FIG9 ) may be electrically connected to the second end of the first connecting wire 335 , the first end of the secondary coil L2 (i.e., the upper end of the secondary coil L2 shown in FIG9 ) may be electrically connected to the first end of the second connecting wire 336 , and the second end of the second connecting wire 336 may be electrically connected to the output interface 350 . The primary coil L1 and the secondary coil L2 may be used to step down the voltage of the first direct current output by the rectifier unit 331 through electromagnetic induction to obtain a third direct current and transmit it to the load. A plurality of switches may be electrically connected to the primary coil L1 and the secondary coil L2 , respectively, to form a primary circuit and a secondary circuit.

[0143] In some embodiments, the step-down DC-DC converter circuit 334 may further include an absorption circuit 3341. The input end of the absorption circuit 3341 may be electrically connected to the second end of the first connecting line 335, and the output end of the absorption circuit 3341 may be electrically connected to the first end of the primary coil L1 (i.e., the upper end of the primary coil L1 shown in FIG9 ). The absorption circuit 3341 may be used to absorb the spike voltage generated by the switch in the step-down DC-DC converter circuit 334 during instantaneous switching, thereby avoiding damage to the switch and ensuring the normal operation of the step-down DC-DC converter circuit 334. Exemplarily, the absorption circuit 3341 may be composed of a resistor, a capacitor, and a diode.

[0144] In some embodiments, as shown in FIG9 , the charging module 330 may further include a conversion controller 337, which may be disposed within the second housing 320. The conversion controller 337 may be configured to control the conduction of multiple switches in the step-down DC-DC converter circuit 334 to ensure that the third DC power output by the secondary coil L2 to the load meets the charging requirements of the load.

[0145] For the relevant description of the conversion controller 337, please refer to the relevant part of the wireless charging controller 3321 mentioned above, which will not be repeated here.

[0146] It can be understood that the third DC current satisfies the charging information of the load, which may refer to the peak voltage / average voltage and peak current / average current of the third DC current satisfying the requirements of the load for charging voltage and charging current when charging.

[0147] In the embodiment of the present application, the step-down DC-DC converter circuit 334 can be disposed within the second housing 320 together with the RX-end coil assembly and electrically connected to the rectifier unit 331 within the first housing 310 via the first connecting wire 335. This facilitates full utilization of the space within the second housing 320, resulting in a simple and compact structural design and facilitating miniaturization of the adapter 300.

[0148] Fig. 11 is a diagram showing a specific example of a charging module 330 inside an adapter 300 according to an embodiment of the present application. Fig. 12 is a diagram showing a possible product form of the adapter 300 shown in Fig. 11 according to an embodiment of the present application.

[0149] 11 and 12 , the step-down DC-DC converter circuit 334 can be disposed within the first housing 310. The first and second ends of the first connecting wire 335 can both be located within the first housing 310 and electrically connected to the output of the DC-DC converter circuit 3312 and the input of the step-down DC-DC converter circuit 334, respectively. The first end of the second connecting wire 336 can be located within the first housing 310 and electrically connected to the output of the step-down DC-DC converter circuit 334. The second end of the second connecting wire 336 can be located within the second housing 320 and electrically connected to a load.

[0150] Specifically, a first end of the second connecting wire 336 can be electrically connected to a first end of the secondary coil L2 (i.e., the upper end of the secondary coil L2 shown in FIG11 ) in the step-down DC-DC converter circuit 334. A second end of the second connecting wire 336 can pass through the first housing 310 , bypass the connecting mechanism 360 , extend into the second housing 320 , and be electrically connected to the output interface 350 .

[0151] In this embodiment of the present application, the step-down DC-DC converter circuit 334 can be disposed within the first housing 310 along with the TX-end coil assembly. The circuit is electrically connected to the output interface 350 on the second housing 310 via a second connecting line 336, thereby electrically connecting the step-down DC-DC converter circuit 334 to the load. This facilitates full utilization of the space within the first housing 310, resulting in a simple and compact structural design and facilitating miniaturization of the adapter 300.

[0152] FIG13 is a specific example diagram of a charging module 330 inside an adapter 300 provided in an embodiment of the present application.

[0153] Different from the embodiment shown in Figure 11, in the embodiment shown in Figure 13, when the step-down DC-DC conversion circuit 334 is arranged in the first shell 310, only the secondary coil L2 of the transformer can be set in the step-down DC-DC conversion circuit 334, and the TX end coil component in the wireless charging unit 332 is used as the primary coil L1 of the transformer and the first magnetic core MC.

[0154] Specifically, the TX-end coil assembly may include a TX-end magnetic core MC and a TX-end coil L3, and the step-down DC-DC converter circuit 334 may include a secondary coil L2. The TX-end coil L3 and the secondary coil L2 are wound around the TX-end magnetic core MC. That is, the TX-end coil L3 and the secondary coil L2 are magnetically coupled via the TX-end magnetic core MC. The first end of the TX-end coil L3 (i.e., the upper end of the TX-end coil L3 shown in FIG13 ) may be electrically connected to the output end of the rectifier unit 332, the first end of the secondary coil L2 (i.e., the upper end of the secondary coil L2 shown in FIG13 ) may be electrically connected to the first end of the second connecting wire 336, and the second end of the second connecting wire 336 may extend into the second housing 320 and be electrically connected to the output interface 350.

[0155] The TX-end coil L3 and the secondary coil L2 can be used to reduce the voltage of the first direct current output by the rectifier unit 332 through electromagnetic induction, and then obtain the third direct current to be delivered to the load.

[0156] In this embodiment of the present application, the TX-end coil L3 serves as the primary coil L1 in the step-down DC-DC converter circuit 334. This coil L3 is coupled to the secondary coil L2 in the step-down DC-DC converter circuit 334 via the TX-end magnetic core, forming a transformer in the step-down DC-DC converter circuit. This eliminates the need for a separate primary coil L1 in the step-down DC-DC converter circuit 334, reducing the number of electronic components in the adapter 300 and further miniaturizing the adapter 300.

[0157] Fig. 14 is a diagram showing a specific example of a charging module 330 inside an adapter 300 according to an embodiment of the present application. Fig. 15 is a diagram showing a possible product form of the adapter 300 shown in Fig. 14 according to an embodiment of the present application.

[0158] 14 and 15 , part of the structure of the step-down DC-DC conversion circuit 334 may be disposed at the connection mechanism 360 between the first housing 310 and the second housing 320 .

[0159] Specifically, in the step-down DC-DC converter circuit 334, the transformer's first magnetic core MC can be disposed at the connection mechanism 360. For example, when the connection mechanism 360 is a rotating shaft mechanism, the rotating shaft in the rotating shaft mechanism can serve as the first magnetic core MC. The transformer's primary coil L1 and secondary coil L2 can be wound around the rotating shaft, thereby being magnetically coupled via the rotating shaft. For example, as shown in FIG15 , the first magnetic core MC can be enclosed within the interior space of the first housing 310; alternatively, the first magnetic core MC can be enclosed within the interior space of the second housing 320.

[0160] In one example, the first end of the primary coil L1 (i.e., the upper end of the primary coil L1 shown in Figure 14) can be extended into the first shell 310 and electrically connected to the output end of the rectifier unit 331 through the first connecting line 335, and the first end of the secondary coil L2 (i.e., the upper end of the secondary coil L2 shown in Figure 14) can be extended into the second shell 320 and electrically connected to the output interface 350 through the second connecting line 336.

[0161] In another example, the first end of the primary coil L1 and the first end of the secondary coil L2 can both extend into the second housing 320. In this case, the first end of the first connecting wire 335 can be located within the first housing 310 and electrically connected to the output end of the rectifier unit 331. The second end of the first connecting wire 335 can be located within the second housing 320 and electrically connected to the first end of the primary coil L1. For a detailed description, please refer to the embodiments shown in Figures 9 and 10, and will not be repeated here.

[0162] In another example, the first end of the primary coil L1 and the first end of the secondary coil L2 can both extend into the first housing 310. In this case, the first end of the second connecting wire 336 can be located within the first housing 310 and electrically connected to the first end of the secondary coil L2. The second end of the second connecting wire 336 can be located within the second housing 320 and electrically connected to the output interface 350. For a detailed description, please refer to the embodiments shown in Figures 11 and 12, and will not be repeated here.

[0163] In an embodiment of the present application, the magnetic core of the step-down DC-DC conversion circuit 334 is set at the connecting mechanism 360 to fully utilize the space at the connecting mechanism 360, thereby reducing the space occupied by the magnetic core in the first shell 310 or the second shell 320, so that more electronic components can be accommodated in the first shell 310 or the second shell 320 to increase the charging power of the adapter 300.

[0164] A specific example of the first DC-DC conversion circuit 3312 provided in an embodiment of the present application is described below with reference to the accompanying drawings.

[0165] 16 to 19 are specific example diagrams of the first DC-DC conversion circuit 3312 provided in embodiments of the present application.

[0166] 16 to 18 , the first DC-DC conversion circuit 3312 may include a capacitor C1, a capacitor C2, a diode D1, a switch S1, and an inductor L1, thereby forming a buck-boost circuit, a buck circuit, and a boost circuit.

[0167] Specifically, referring to FIG16 , the first DC-DC converter circuit 3312 may be a buck-boost circuit that can boost or buck the first DC power output by the rectifier circuit 3311. That is, when the first DC-DC converter circuit 3312 converts the fourth DC power output by the rectifier circuit 3311 into the first DC power, the voltage of the first DC power may be greater than the voltage of the fourth DC power, or the voltage of the first DC power may be less than the voltage of the fourth DC power.

[0168] 17 , the first DC-DC converter circuit 3312 may be a step-down circuit. The first DC-DC converter circuit 3312 may step down the first DC power output by the rectifier circuit 3311. That is, when the first DC-DC converter circuit 3312 converts the fourth DC power output by the rectifier circuit 3311 into the first DC power, the voltage of the first DC power may be lower than the voltage of the fourth DC power.

[0169] Referring to FIG. 18 , the first DC-DC converter circuit 3312 may be a boost circuit that can boost the first DC power output by the rectifier circuit 3311. That is, when the first DC-DC converter circuit 3312 converts the fourth DC power output by the rectifier circuit 3311 into the first DC power, the voltage of the first DC power may be greater than the voltage of the fourth DC power.

[0170] Unlike the embodiments shown in Figures 16 to 18 , referring to Figure 19 , the output terminals of the first DC-DC converter circuit 3312 can be directly electrically connected via a wire. That is, when the first DC-DC converter circuit 3312 converts the fourth DC power output by the rectifier circuit 3311 into the first DC power, the voltage of the first DC power can be equal to the voltage of the fourth DC power.

[0171] FIG20 is a flow chart of a charging method 400 provided in an embodiment of the present application, wherein the charging method 400 can be applied to the adapter 300 described above.

[0172] The adapter 300 may include a first housing 310, a second housing 320, and a charging module 330. The charging module 330 may include a rectifier unit 331 and a wireless charging unit 332. The wireless charging unit 332 may include a TX-end coil assembly and an RX-end coil assembly. The first housing 310 and the second housing 320 are rotatably connected. The rectifier unit 331 and the TX-end coil assembly may be disposed within the first housing 310. The output end of the rectifier unit 331 may be electrically connected to the TX-end coil assembly. The RX-end coil assembly may be disposed within the second housing 320.

[0173] As shown in FIG. 20 , the charging method 400 may include:

[0174] S410 , the rectifying unit 331 may receive alternating current (AC) from an external power source, convert the AC into a first DC, and transmit the DC to the TX-end coil assembly.

[0175] In some embodiments, the rectifier unit 331 may include a rectifier conversion circuit 3311 and a first DC-DC conversion circuit 3312. The input end of the rectifier conversion circuit 3311 may be electrically connected to the input interface 340. The output end of the rectifier conversion circuit 3311 may be electrically connected to the input end of the first DC-DC conversion circuit 3312, and the output end of the first DC-DC conversion circuit 3312 may be electrically connected to the TX-end coil assembly. In this case, step S410 may include:

[0176] The rectifier and converter circuit 3311 can receive AC power from an external power source, convert the AC power into a fourth DC power, and then transmit it to the first DC-DC converter circuit 3312;

[0177] The first DC-DC conversion circuit 3312 can convert the fourth direct current into a first direct current and transmit the first direct current to the TX-end coil assembly.

[0178] S420: The TX-end coil assembly may convert the first direct current into electromagnetic waves, and the RX-end coil assembly may convert the electromagnetic waves into second direct current and transmit the second direct current to the load, thereby charging the load.

[0179] Specifically, when the first shell 310 and the second shell 320 are in the first combined state, a coupled electromagnetic field can be generated in the gap between the TX end coil assembly and the RX end coil assembly, so that the adapter 300 can transmit the DC power output by the rectifier unit 331 from the TX end coil assembly to the RX end coil assembly based on wireless transmission in the folded state, thereby charging the load through the RX end coil assembly. In some embodiments, the first DC-DC conversion circuit 3312 may include multiple switches, and the wireless charging unit 332 may further include a wireless charging controller 3321, which may be disposed in the first shell 310. At this time, the method 400 may also include:

[0180] The wireless charging controller 3321 may receive a feedback signal sent by the RX-end coil assembly, which may be used to indicate charging information of the load;

[0181] The wireless charging controller 3322 can also determine a driving signal based on the feedback signal, and the driving signal can be used to control the on and off of multiple switches in the above-mentioned first DC-DC conversion circuit 3312, so that the first DC-DC conversion circuit 3312 outputs the first direct current according to the charging information.

[0182] In some embodiments, the charging module 330 may further include a step-down DC-DC converter circuit 334. The input end of the step-down DC-DC converter circuit 334 may be electrically connected to the output end of the rectifier unit 332. In this case, the method 400 may further include:

[0183] The step-down DC-DC converter circuit 334 can convert the first DC power outputted by the rectifier unit 332 into a third DC power and transmit the third DC power to the load, thereby charging the load. The voltage of the third DC power is lower than that of the first DC power.

[0184] For the undetailed parts of the above-mentioned charging method 400, please refer to the relevant description of the adapter 300 described in Figures 3 to 19 above, which will not be repeated here.

[0185] In an embodiment of the present application, the adapter 300 utilizes the TX end coil assembly and the RX end coil assembly respectively arranged in the two shells, and transmits the DC power output by the rectifier unit 331 from the TX end coil assembly to the end coil assembly based on wireless transmission in the folded state, thereby charging the load through the RX end coil assembly. This can reduce the space occupied by the adapter 300 when in use, which is conducive to the miniaturization of the adapter 300. In addition, the TX end coil assembly and the RX end coil assembly are separately arranged in two shells, which can avoid the impact of the shell folding on the volume of the TX end coil assembly and the RX end coil assembly, so as to ensure the output power of the adapter 300, which is conducive to enabling the adapter 300 to meet higher charging power requirements.

[0186] FIG21 is a schematic structural diagram of a charging system 500 provided in an embodiment of the present application.

[0187] As shown in FIG21 , a charging system 500 may include the adapter 300 and a load 510 as described in the above embodiments. The output interface 350 of the adapter 300 may be electrically connected to the load 510 via a power line 520 .

[0188] 4 , 7 , and 21 , the adapter 300 is in a folded state, with the first housing 310 and second housing 320 of the adapter 300 in a first assembled state. In this state, in the charging system 500, the adapter 300 can utilize the RX end coil assembly in the charging module 330 to deliver DC power to the load 510 via the power cord 520 to charge the load 510. Alternatively, the adapter 300 can also utilize the step-down DC-DC converter circuit 334 in the charging module 330 to deliver DC power to the load 510 via the power cord 520 to charge the load 510.

[0189] FIG22 is a schematic structural diagram of another charging system 500 provided in an embodiment of the present application.

[0190] 6 , 8 , and 22 , the adapter 300 is in the unfolded state, with the first housing 310 and second housing 320 of the adapter 300 in the second assembled state. In this state, in the charging system 500 , the adapter 300 can utilize the step-down DC-DC converter circuit 334 in the charging module 330 to deliver DC power to the load 510 via the power cord 520 , thereby charging the load 510.

[0191] For the parts not described in detail above about the charging system 500 , please refer to the embodiment shown in FIG1 , and will not be described again here.

[0192] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. An adapter, characterized in that: include: A first shell, a second shell and a charging module; The first shell and the second shell are rotatably connected; The charging module includes a rectifier unit and a wireless charging unit, wherein the rectifier unit is disposed in the first housing, and the wireless charging unit includes a transmitting end coil component and a receiving end coil component, wherein the transmitting end coil component is disposed in the first housing, the transmitting end coil component is electrically connected to the output end of the rectifier unit, and the receiving end coil component is disposed in the second housing; The rectifying unit is used to receive alternating current from an external power source, convert the alternating current into a first direct current and transmit the first direct current to the transmitting end coil assembly; The transmitting-end coil assembly is used to convert the first direct current into electromagnetic waves, and the receiving-end coil assembly is used to convert the electromagnetic waves into second direct current and transmit the second direct current to a load.

2. The adapter according to claim 1, characterized in that: The charging module further includes a step-down DC-DC conversion circuit, wherein an input end of the step-down DC-DC conversion circuit is electrically connected to an output end of the rectifier unit; The step-down DC-DC conversion circuit is used to convert the first direct current output by the rectifying unit into a third direct current and transmit it to the load, and the voltage of the third direct current is lower than the voltage of the first direct current.

3. The adapter according to claim 2, characterized in that: The step-down DC-DC conversion circuit is arranged in the second housing. The adapter also includes a first connecting wire, a first end of which is located in the first shell, and the first end of which is electrically connected to the output end of the rectifier unit, and a second end of the first connecting wire is located in the second shell, and the second end of the first connecting wire is electrically connected to the input end of the step-down DC-DC conversion circuit.

4. The adapter according to claim 2, characterized in that: The step-down DC-DC conversion circuit is arranged in the first housing. The adapter also includes a second connecting wire, a first end of which is located in the first shell, the first end of which is electrically connected to the output end of the step-down DC-DC conversion circuit, and a second end of which is located in the second shell, and the second end of which is used to be electrically connected to the load.

5. The adapter according to claim 4, characterized in that: The transmitting end coil assembly includes a transmitting end coil and a transmitting end magnetic core, and the step-down DC-DC conversion circuit includes a secondary coil. The transmitting end coil and the secondary coil are wound around the transmitting end magnetic core, the transmitting end coil is electrically connected to the output end of the rectifier unit, and the secondary coil is electrically connected to the first end of the second connecting line; The transmitting end coil and the secondary coil are used to reduce the voltage of the first direct current output by the rectifying unit through electromagnetic induction to obtain the third direct current and transmit it to the load.

6. The adapter according to any one of claims 2 to 4, characterized in that: The adapter also includes a connecting mechanism; The connecting mechanism is located between the first shell and the second shell, and the connecting mechanism is rotatably connected to the first shell and the second shell respectively; The step-down DC-DC conversion circuit comprises a primary coil, a secondary coil and a first magnetic core, wherein the first magnetic core is arranged at the connection mechanism, the primary coil and the secondary coil are wound around the first magnetic core, the primary coil is electrically connected to the output end of the rectifier unit, and the secondary coil is used to be electrically connected to the load; The primary coil and the secondary coil are used to reduce the voltage of the first direct current output by the rectifying unit through electromagnetic induction to obtain the third direct current and transmit it to the load.

7. The adapter according to any one of claims 1 to 6, characterized in that: The adapter also includes an input interface and an output interface; The input interface is disposed on the first housing, the input interface is electrically connected to the input end of the rectifier unit, and the input interface is used to be electrically connected to the external power supply; The output interface is disposed on the second housing, the output interface is electrically connected to the receiving end coil assembly, and the output interface is used to be electrically connected to the load.

8. The adapter according to any one of claims 1 to 7, characterized in that: The rectifying unit comprises a rectifying conversion circuit and a first DC-DC conversion circuit; The output end of the rectifier unit is electrically connected to the input end of the first DC-DC conversion circuit, and the output end of the first DC-DC conversion circuit is electrically connected to the transmitting end coil assembly; The rectifying and converting circuit is used for receiving the alternating current from the external power source, converting the alternating current into a fourth direct current and transmitting the fourth direct current to the first DC-DC converting circuit; The first DC-DC conversion circuit is used to convert the fourth direct current into the first direct current and transmit the first direct current to the transmitting end coil assembly.

9. The adapter according to claim 8, characterized in that: The first DC-DC conversion circuit includes a plurality of switches, and the wireless charging unit also includes a wireless charging controller. Wherein, the wireless charging controller is arranged in the first housing, and the wireless charging controller is used for: receiving a feedback signal sent by the receiving end coil assembly, wherein the feedback signal is used to indicate charging information of the load; A driving signal is determined according to the feedback signal, and the driving signal is used to control the on and off of the multiple switches so that the first DC-DC conversion circuit outputs the first direct current according to the charging information.

10. A charging system, characterized in that: include: adapter and load; Wherein, the adapter comprises a first shell, a second shell and a charging module; The first shell and the second shell are rotatably connected; The charging module includes a rectifier unit and a wireless charging unit, wherein the rectifier unit is arranged in the first shell, and the wireless charging unit includes a transmitting end coil component and a receiving end coil component, wherein the transmitting end coil component is arranged in the first shell, and the transmitting end coil component is electrically connected to the output end of the rectifier unit, and the receiving end coil component is arranged in the second shell, and the receiving end coil component is electrically connected to the load; The rectifying unit is used to receive alternating current from an external power source, convert the alternating current into a first direct current and transmit the first direct current to the transmitting end coil assembly; The transmitting end coil assembly is used to convert the first direct current into electromagnetic waves, and the receiving end coil assembly is used to convert the electromagnetic waves into second direct current and transmit the second direct current to the load.

11. The charging system according to claim 10, characterized in that: The charging module further includes a step-down DC-DC conversion circuit, wherein an input end of the step-down DC-DC conversion circuit is electrically connected to an output end of the rectifier unit, and an output end of the step-down DC-DC conversion circuit is electrically connected to the load; The step-down DC-DC conversion circuit is used to convert the first direct current output by the rectifying unit into a third direct current and transmit it to the load, and the voltage of the third direct current is lower than the voltage of the first direct current.

12. The charging system according to claim 10 or 11, characterized in that: The rectifying unit comprises a rectifying conversion circuit and a first DC-DC conversion circuit; The output end of the rectifier unit is electrically connected to the input end of the first DC-DC conversion circuit, and the output end of the first DC-DC conversion circuit is electrically connected to the transmitting end coil assembly; The rectifying and converting circuit is used for receiving the alternating current from the external power source, converting the alternating current into a fourth direct current and transmitting the fourth direct current to the first DC-DC converting circuit; The first DC-DC conversion circuit is used to convert the fourth direct current into the first direct current and transmit the first direct current to the transmitting end coil assembly.

13. The charging system according to claim 12, characterized in that: The first DC-DC conversion circuit includes a plurality of switches, and the wireless charging unit also includes a wireless charging controller. Wherein, the wireless charging controller is arranged in the first housing, and the wireless charging controller is used for: receiving a feedback signal sent by the receiving end coil assembly, wherein the feedback signal is used to indicate charging information of the load; A driving signal is determined according to the feedback signal, and the driving signal is used to control the on and off of the multiple switches so that the first DC-DC conversion circuit outputs the first direct current according to the charging information.

14. A charging method, applied to an adapter, characterized in that: The adapter comprises a first shell, a second shell and a charging module, the charging module comprises a rectifying unit and a wireless charging unit, and the wireless charging unit comprises a transmitting end coil assembly and a receiving end coil assembly; The first shell and the second shell are rotatably connected, the rectifier unit and the transmitting coil assembly are arranged in the first shell, the output end of the rectifier unit is electrically connected to the transmitting coil assembly, and the receiving coil assembly is arranged in the second shell; The charging method comprises: The rectifying unit receives alternating current from an external power source, converts the alternating current into a first direct current and transmits the first direct current to the transmitting end coil assembly; The transmitting-end coil assembly converts the first direct current into electromagnetic waves, and the receiving-end coil assembly converts the electromagnetic waves into second direct current and transmits the second direct current to a load.

15. The charging method according to claim 14, characterized in that: The charging module further includes a step-down DC-DC conversion circuit, wherein an input end of the step-down DC-DC conversion circuit is electrically connected to an output end of the rectifier unit; The charging method further comprises: The step-down DC-DC conversion circuit converts the first direct current output by the rectifying unit into a third direct current, and transmits the third direct current to the load, wherein the voltage of the third direct current is lower than the voltage of the first direct current.

16. The charging method according to claim 14 or 15, characterized in that: The rectifier unit includes a rectifier conversion circuit and a first DC-DC conversion circuit, the output end of the rectifier unit is electrically connected to the input end of the first DC-DC conversion circuit, and the output end of the first DC-DC conversion circuit is electrically connected to the transmitting end coil assembly; The rectifying unit receives alternating current from an external power source, converts the alternating current into a first direct current and transmits the first direct current to the transmitting end coil assembly, including: The rectifying and converting circuit receives the alternating current from the external power source, converts the alternating current into a fourth direct current and transmits the fourth direct current to the first DC-DC converting circuit; The first DC-DC conversion circuit converts the fourth direct current into the first direct current, and transmits the first direct current to the transmitting-end coil assembly.

17. The charging method according to claim 16, characterized in that: The first DC-DC conversion circuit includes a plurality of switches, and the wireless charging unit further includes a wireless charging controller, and the wireless charging controller is disposed in the first housing; The charging method further comprises: The wireless charging controller receives a feedback signal sent by the receiving end coil assembly, wherein the feedback signal is used to indicate charging information of the load; The wireless charging controller determines a driving signal according to the feedback signal, and the driving signal is used to control the on and off of the multiple switches so that the first DC-DC conversion circuit outputs the first direct current according to the charging information.

Images