Bidirectional wireless charging transceiver circuit and electronic device

Abstract

The present application proposes a bidirectional wireless charging transceiver circuit and an electronic device. The bidirectional wireless charging transceiver circuit includes a controller, a resonant cavity, and a rectifier unit; the controller is used to determine the current mode according to a mode signal. The user can select the current mode of the bidirectional wireless charging transceiver circuit through the mode signal. The current mode can be either a receiving mode or a transmitting mode, that is, the bidirectional wireless charging transceiver circuit can be used as a transmitting end or a receiving end, and can be reused. When the current mode is a receiving mode, the resonant cavity is used to receive the energy transmitted by the transmitting device and generate a resonant current; the controller is also used to send a driving signal to the rectifier unit when the direction of the resonant current is a preset direction, so as to drive the rectifier unit to rectify and adjust the resonant current, and charge the battery through the resonant current after rectification and adjustment. Avoid turning on the rectifier unit when the resonant cavity does not receive energy, which will discharge the battery instead.

Description

Technical Field

[0001] The present application relates to the field of charging, and in particular to a bidirectional wireless charging transceiver circuit and electronic equipment. Background Art

[0002] With the development of society and the progress of science, people's living standards have been significantly improved, and more and more electronic devices have been widely used in people's lives. Electronic devices include mobile phones, tablets, smart watches, wireless headphones, etc. The characteristic of electronic devices is that they consume electrical energy to provide corresponding functions or services to meet people's needs. When the electrical energy is consumed, the electronic devices need to be charged.

[0003] The existing technology mostly adopts wired charging technology, which is limited by charging cables, charging sockets and charging heads, and is not convenient to use. How to develop a charging technology that can flexibly transmit electric energy has become a difficult problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] The purpose of the present application is to provide a bidirectional wireless charging transceiver circuit and an electronic device to at least partially improve the above-mentioned problems.

[0005] In order to achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0006] In a first aspect, an embodiment of the present application provides a bidirectional wireless charging transceiver circuit, wherein the bidirectional wireless charging transceiver circuit includes a controller, a resonant cavity, and a rectifier unit;

[0007] The first end of the resonant cavity is connected to the first end of the rectifier unit, the second end of the resonant cavity is connected to the second end of the rectifier unit, the third end and the fourth end of the rectifier unit are respectively connected to the positive electrode and the negative electrode of the battery, and the controller is connected to the rectifier unit;

[0008] The controller is used to determine the current mode according to the mode signal, wherein the current mode includes a transmission mode and a reception mode, and the mode signal includes a transmission start signal corresponding to the transmission mode and a reception start signal corresponding to the reception mode;

[0009] When the current mode is the transmitting mode, the controller is used to send a driving signal to the rectifying unit to drive the rectifying unit to rectify and regulate the discharge current released by the battery, and input the rectified and regulated discharge current into the resonant cavity;

[0010] The resonant cavity is used to transmit energy to a corresponding receiving device after a discharge current flows into the cavity;

[0011] When the current mode is a receiving mode, the resonant cavity is used to receive energy transmitted by a transmitting device and generate a resonant current;

[0012] The controller is also used to send a driving signal to the rectifier unit when the direction of the resonant current is a preset direction, so as to drive the rectifier unit to rectify and regulate the resonant current, and charge the battery through the rectified and regulated resonant current.

[0013] Optionally, the rectifying unit includes a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, an inductor and a first capacitor;

[0014] The first electrode of the first switch tube and the first electrode of the second switch tube are connected to one point as the first end of the rectifier unit, and the first electrode of the third switch tube and the first electrode of the fourth switch tube are connected to one point as the second end of the rectifier unit;

[0015] The second electrode of the first switch tube and the second electrode of the fourth switch tube are both grounded;

[0016] The second electrode of the second switch tube and the second electrode of the third switch tube are connected to one point, one electrode of the first capacitor is connected between the second electrode of the second switch tube and the second electrode of the third switch tube, and one end of the inductor is connected to the second end of the rectifier unit;

[0017] The other end of the inductor serves as the third end of the rectifier unit, and the fourth end of the rectifier unit serves as the ground end;

[0018] The other electrode of the first capacitor is connected to the third terminal of the rectifier unit or the ground;

[0019] The third electrode of the first switch tube, the third electrode of the second switch tube, the third electrode of the third switch tube and the third electrode of the fourth switch tube are all connected to the controller;

[0020] The controller is used to send a drive signal to the third pole of the first switch tube, the third pole of the second switch tube, the third pole of the third switch tube, and the third pole of the fourth switch tube according to the current operating condition to switch the working phase of the rectifier unit, wherein the current operating condition is any one of the receiving conditions corresponding to the receiving mode.

[0021] Optionally, the bidirectional wireless charging transceiver circuit further includes a first comparator, a second comparator and a selector, wherein the inverting input terminal of the first comparator is connected to the first end of the resonant cavity, the non-inverting input terminal of the first comparator is grounded, the output terminal of the first comparator is connected to the first input terminal of the selector, the output terminal of the selector is connected to the controller, the inverting input terminal of the second comparator is connected to the second end of the resonant cavity, the non-inverting input terminal of the second comparator is grounded, and the output terminal of the second comparator is connected to the controller;

[0022] The second comparator is used to collect a second level signal at the second end of the resonant cavity, when the second level signal is greater than 0, the second output signal is 0, when the second level signal is less than 0, the second output signal is a high level, wherein the second output signal is the output signal of the second comparator;

[0023] The first comparator is used to collect a first level signal at the first end of the resonant cavity, when the first level signal is greater than 0, the first output signal is 0, when the first level signal is less than 0, the first output signal is a high level, wherein the first output signal is the output signal of the first comparator;

[0024] In the case where the mode signal is a receiving start signal, the selector is used to forward the first output signal to the controller;

[0025] The controller is used to switch the current working state according to the first output signal, the second output signal and the resonant current.

[0026] Optionally, the receiving operating condition includes a first receiving operating condition, a second receiving operating condition and a third receiving operating condition;

[0027] The first receiving condition is that the controller outputs a high level signal to the third electrode of the second switch tube and the third electrode of the fourth switch tube to turn on the second switch tube and the fourth switch tube, and outputs a low level signal to the third electrode of the first switch tube and the third electrode of the third switch tube to turn off the first switch tube and the third switch tube;

[0028] The second receiving condition is that the controller outputs a low level signal to the third electrode of the second switch tube and the third electrode of the fourth switch tube to disconnect the second switch tube and the fourth switch tube, and outputs a high level signal to the third electrode of the first switch tube and the third electrode of the third switch tube to connect the first switch tube and the third switch tube;

[0029] The third receiving condition includes a first interval, a second interval and a third interval;

[0030] The first interval is when the controller outputs a high level signal to the third electrode of the fourth switch tube to turn on the fourth switch tube, and outputs a low level signal to the third electrode of the first switch tube, the third electrode of the second switch tube, and the third electrode of the third switch tube to turn off the first switch tube, the second switch tube, and the third switch tube;

[0031] The second interval is when the controller outputs a high level signal to the third electrode of the first switch tube and the third electrode of the fourth switch tube to turn on the first switch tube and the fourth switch tube, and outputs a low level signal to the third electrode of the second switch tube and the third electrode of the third switch tube to turn off the second switch tube and the third switch tube;

[0032] The third interval is when the controller outputs a high level signal to the third pole of the first switch tube to turn on the first switch tube, and outputs a low level signal to the third pole of the second switch tube, the third pole of the third switch tube, and the third pole of the fourth switch tube to turn off the second switch tube, the third switch tube, and the fourth switch tube;

[0033] When the current operating condition is the first receiving operating condition, when the resonant current changes from a negative direction to a positive direction, the controller is used to switch the first interval to a new current operating condition; when the first output signal changes from 0 to a high level, the controller is used to switch the second interval to a new current operating condition; when the second output signal changes from a high level to 0, the controller is used to switch the third interval to a new current operating condition, and after the first pole level of the third switch tube is higher than the second pole level of the third switch tube, the controller is used to switch the second receiving operating condition to the new current operating condition.

[0034] Optionally, the receiving working condition further includes a fourth receiving working condition;

[0035] The fourth receiving working condition is that the controller outputs a high level signal to the third electrode of the first switch tube and the third electrode of the fourth switch tube to turn on the first switch tube and the fourth switch tube, and outputs a low level signal to the third electrode of the second switch tube and the third electrode of the third switch tube to turn off the second switch tube and the third switch tube;

[0036] When the current operating condition is the second receiving operating condition, when the resonant current changes from a positive direction to a negative direction, the controller is used to switch the fourth receiving operating condition to a new current operating condition; after a preset time interval, the controller is used to switch the first receiving operating condition to a new current operating condition, wherein the preset time interval is an integer multiple of the resonant current conversion period.

[0037] Optionally, the output end of the first comparator is also connected to the controller, and when the mode signal is a transmission start signal, the selector is used to forward the received clock signal to the controller;

[0038] The controller is used to switch the current working state according to the first output signal, the second output signal and the discharge current after receiving the clock signal.

[0039] Optionally, the rectifying unit further includes a second capacitor, and two poles of the second capacitor are respectively connected to the third end and the fourth end of the rectifying unit.

[0040] Optionally, the resonant cavity includes a resonant coil and a resonant capacitor, one end of the resonant coil is connected to one pole of the resonant capacitor, and the other end of the resonant coil and the other pole of the resonant capacitor serve as the first end and the second end of the resonant cavity respectively.

[0041] In a second aspect, an embodiment of the present application provides an electronic device, wherein the electronic device includes the above-mentioned bidirectional wireless charging transceiver circuit.

[0042] Compared with the prior art, the bidirectional wireless charging transceiver circuit and electronic device provided in the embodiment of the present application include a controller, a resonant cavity and a rectifier unit; the controller is used to determine the current mode according to the mode signal. The user can select the current mode of the bidirectional wireless charging transceiver circuit through the mode signal, and the current mode can be either a receiving mode or a transmitting mode, that is, the bidirectional wireless charging transceiver circuit can be used as a transmitting end or a receiving end, and can be reused. When the current mode is the transmitting mode, the controller is used to send a driving signal to the rectifier unit to drive the rectifier unit to rectify and adjust the discharge current released by the battery, and input the rectified and adjusted discharge current into the resonant cavity; the resonant cavity is used to transmit energy to the corresponding receiving device after the discharge current flows in; when the current mode is the receiving mode, the resonant cavity is used to receive the energy transmitted by the transmitting device and generate a resonant current; the controller is also used to send a driving signal to the rectifier unit when the direction of the resonant current is a preset direction, so as to drive the rectifier unit to rectify and adjust the resonant current, and charge the battery through the rectified and adjusted resonant current. When the direction of the resonant current is the preset direction, the resonant cavity is already receiving energy, and a driving signal can be sent to the rectifier unit to drive the rectifier unit to rectify and adjust the resonant current, and charge the battery through the rectified and adjusted resonant current. Avoid turning on the rectifier unit when the resonant cavity does not receive energy, which will discharge the battery instead.

[0043] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1a A connection diagram of the wireless fast charging receiving solution provided in an embodiment of the present application;

[0046] Figure 1b A schematic diagram of the structure of an improved receiving end provided in an embodiment of the present application;

[0047] Figure 2 A connection diagram of a bidirectional wireless charging transceiver circuit provided in an embodiment of the present application;

[0048] Figure 3 One of the connection diagrams of the bidirectional wireless charging transceiver circuit provided in an embodiment of the present application;

[0049] Figure 4 A connection diagram of a first receiving working condition provided in an embodiment of the present application;

[0050] Figure 5 A connection diagram of a second receiving working condition provided in an embodiment of the present application;

[0051] Figure 6 A connection diagram of a third receiving working condition provided in an embodiment of the present application;

[0052] Figure 7 A schematic diagram of current level changes in a receiving mode provided by an embodiment of the present application;

[0053] Figure 8 A connection diagram of a first transmitting condition provided in an embodiment of the present application;

[0054] Fig. 9 A connection diagram of a second transmitting condition provided in an embodiment of the present application;

[0055] Fig.10 A connection diagram of a third transmitting condition provided in an embodiment of the present application;

[0056] Fig.11 A schematic diagram of current level changes in the transmission mode provided in an embodiment of the present application.

[0057] In the figure: 10-bidirectional wireless charging transceiver circuit; 101-controller; 102-rectifier unit; 103-resonant cavity. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0059] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0060] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0061] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0062] In the description of the present application, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0063] In the description of this application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0064] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0065] With the development of wireless charging technology, in order to further improve the flexibility of power transmission, bidirectional wireless charging technology has been proposed and developed. By reusing large-volume power devices at the transmitting and receiving ends, bidirectional wireless charging technology can achieve convenient and low-cost device-to-device wireless charging. In the application of wireless fast charging, in order to reduce the power loss of the parasitic resistance of the power devices and their interconnection traces, the transmitting and receiving resonant coils need to be driven by high-voltage AC voltage to reduce the transmitting and receiving currents. Figure 1a A wireless fast charging receiving scheme is presented. A high-efficiency switched capacitor DC-DC converter is used to provide a 2:1 step-down ratio. However, the switched capacitor circuit cannot achieve precise voltage control. In order to accurately control the output voltage of the rectifier, the following is proposed Figure 1b The receiving end structure shown in FIG. In this structure, the receiving resonant coil is reused as a power inductor. Voltage control can be achieved by setting the conversion ratio of the switched capacitor converter to 1:1 and 2:1 alternately. However, this solution introduces charge sharing losses between capacitors, reducing the charging efficiency. In addition, in order to provide a continuous charging current, an additional charger is introduced into the structure, resulting in a further decrease in charging efficiency and an increase in cost.

[0066] In order to overcome the above problems, the present application embodiment provides a bidirectional wireless charging transceiver circuit. Figure 2 , Figure 2 This is a connection diagram of a bidirectional wireless charging transceiver circuit provided in an embodiment of the present application. Figure 2 As shown, the bidirectional wireless charging transceiver circuit 10 includes a controller 101 , a resonant cavity 103 and a rectifying unit 102 .

[0067] The first end of the resonant cavity 103 is connected to the first end of the rectifier unit 102, the second end of the resonant cavity 103 is connected to the second end of the rectifier unit 102, the third end and the fourth end of the rectifier unit 102 are respectively connected to the positive and negative poles of the battery, and the controller 101 is connected to the rectifier unit 102.

[0068] The controller 101 is used to determine the current mode according to the mode signal, wherein the current mode includes a transmission mode and a reception mode, and the mode signal includes a transmission start signal corresponding to the transmission mode and a reception start signal corresponding to the reception mode. Figure 3 Mode signal in.

[0069] When the current mode is the transmitting mode, the controller 101 is used to send a driving signal to the rectifying unit 102 to drive the rectifying unit to rectify and regulate the discharge current released by the battery, and input the rectified and regulated discharge current into the resonant cavity 103 .

[0070] Specifically, when the current mode of the bidirectional wireless charging transceiver circuit 10 is the transmitting mode, its circuit connection diagram is as follows: Figure 2 As shown on the left, the rectifier unit 102 starts working upon receiving the driving signal and keeps conducting with the battery. The battery emits a discharge current, and after the rectifier unit 102 performs DC to AC conversion and voltage regulation, the discharge current enters the resonant cavity 103 .

[0071] The resonant cavity 103 is used to transmit energy to a corresponding receiving device after a discharge current flows into the cavity.

[0072] Optionally, after the discharge current flows into the resonant cavity 103 , a magnetic field is generated due to the characteristics of electromagnetic induction, thereby transmitting energy to a corresponding receiving device.

[0073] When the current mode is the receiving mode, the resonant cavity 103 is used to receive the energy transmitted by the transmitting device and generate a resonant current. Specifically, when the current mode of the bidirectional wireless charging transceiver circuit 10 is the receiving mode, its circuit connection diagram is as shown in FIG. Figure 2 Shown on the right.

[0074] The controller 101 is also used to send a driving signal to the rectifying unit 102 when the direction of the resonant current is a preset direction, so as to drive the rectifying unit 102 to rectify and regulate the resonant current, and charge the battery through the rectified and regulated resonant current.

[0075] Optionally, the preset direction is that the resonant current flows from the first end to the second end of the resonant cavity 103 (positive direction) or the resonant current flows from the second end to the first end of the resonant cavity 103 (negative direction), which can be set according to the specific connection relationship.

[0076] When the direction of the resonant current is a preset direction (e.g., a positive direction), it indicates that the resonant cavity 103 is already receiving energy, and a driving signal can be sent to the rectifier unit 102 to drive the rectifier unit 102 to rectify and adjust the resonant current, and charge the battery through the rectified and adjusted resonant current. Avoid turning on the rectifier unit 102 when the resonant cavity 103 does not receive energy, which will discharge the battery instead.

[0077] In one possible implementation, the user can select the current mode of the bidirectional wireless charging transceiver circuit through a mode signal. The current mode can be either a receiving mode or a transmitting mode, that is, the bidirectional wireless charging transceiver circuit can be used as either a transmitting end or a receiving end and can be multiplexed.

[0078] In summary, the embodiment of the present application provides a bidirectional wireless charging transceiver circuit, which includes a controller, a resonant cavity, and a rectifier unit; the controller is used to determine the current mode according to the mode signal. The user can select the current mode of the bidirectional wireless charging transceiver circuit through the mode signal, and the current mode can be either a receiving mode or a transmitting mode, that is, the bidirectional wireless charging transceiver circuit can be used as a transmitting end or a receiving end, and can be reused. When the current mode is the transmitting mode, the controller is used to send a driving signal to the rectifier unit to drive the rectifier unit to rectify and adjust the discharge current released by the battery, and input the rectified and adjusted discharge current into the resonant cavity; the resonant cavity is used to transmit energy to the corresponding receiving device after the discharge current flows in; when the current mode is the receiving mode, the resonant cavity is used to receive the energy transmitted by the transmitting device and generate a resonant current; the controller is also used to send a driving signal to the rectifier unit when the direction of the resonant current is a preset direction, so as to drive the rectifier unit to rectify and adjust the resonant current, and charge the battery through the rectified and adjusted resonant current. When the direction of the resonant current is the preset direction, the resonant cavity is already receiving energy, and a driving signal can be sent to the rectifier unit to drive the rectifier unit to rectify and adjust the resonant current, and charge the battery through the rectified and adjusted resonant current. Avoid turning on the rectifier unit when the resonant cavity does not receive energy, which will discharge the battery instead.

[0079] Regarding the structure of the rectifier unit 102, the present application embodiment also provides a possible implementation method, please refer to Figure 3 The rectifying unit 102 includes a first switch tube S1, a second switch tube S2, a third switch tube S3, a fourth switch tube S4, an inductor L1 and a first capacitor C FLY .

[0080] The first electrode of the first switch tube S1 and the first electrode of the second switch tube S2 are connected to one point as the first end of the rectifying unit 102 , and the first electrode of the third switch tube S3 and the first electrode of the fourth switch tube S4 are connected to one point as the second end of the rectifying unit 102 .

[0081] The second electrode of the first switch tube S1 and the second electrode of the fourth switch tube S4 are both grounded.

[0082] The second electrode of the second switch tube S2 and the second electrode of the third switch tube S3 are connected to one point. The first capacitor C FLY One electrode of the inductor L1 is connected between the second electrode of the second switch tube S2 and the second electrode of the third switch tube S3 , and one end of the inductor L1 is connected to the second end of the rectifying unit 102 .

[0083] The other end of the inductor L1 serves as the third end of the rectifying unit 102 , and the fourth end of the rectifying unit 102 is grounded.

[0084] The first capacitor C FLY The other pole is connected to the third terminal of the rectifying unit 102 or the ground.

[0085] The third electrode of the first switch tube S1 , the third electrode of the second switch tube S2 , the third electrode of the third switch tube S3 , and the third electrode of the fourth switch tube S4 are all connected to the controller 101 .

[0086] The controller 101 is used to send a drive signal to the third pole of the first switch tube S1, the third pole of the second switch tube S2, the third pole of the third switch tube S3, and the third pole of the fourth switch tube S4 according to the current operating condition to switch the working phase of the rectifier unit 102, wherein the current operating condition is any receiving condition corresponding to the receiving mode.

[0087] Regarding the switching of the receiving working condition, the embodiment of the present application also provides a possible implementation method, please continue to refer to Figure 3 The bidirectional wireless charging transceiver circuit 10 also includes a first comparator CMP1, a second comparator and a selector U1. The inverting input terminal of the first comparator CMP1 is connected to the first end of the resonant cavity, the non-inverting input terminal of the first comparator CMP1 is grounded, the output terminal of the first comparator CMP1 is connected to the first input terminal of the selector U1, the output terminal of the selector U1 is connected to the controller 101, the inverting input terminal of the second comparator is connected to the second end of the resonant cavity 103, the non-inverting input terminal of the second comparator is grounded, and the output terminal of the second comparator is connected to the controller 101.

[0088] The second comparator is used to collect the second level signal ( Figure 3 V AC1), when the second level signal is greater than 0, the second output signal is 0, and when the second level signal is less than 0, the second output signal is a high level, wherein the second output signal is the output signal of the second comparator.

[0089] The first comparator CMP1 is used to collect the first level signal ( Figure 3 V AC2 ), when the first level signal is greater than 0, the first output signal is 0, and when the first level signal is less than 0, the first output signal is a high level, wherein the first output signal is the output signal of the first comparator CMP1.

[0090] When the mode signal is a receiving start signal, the selector U1 is used to forward the first output signal to the controller 101 .

[0091] The controller 101 is used for switching the current working state according to the first output signal, the second output signal and the resonant current.

[0092] In a possible implementation, in the initial stage of switching to the receiving mode, the first level signal is in a suspended state, the first output signal corresponding to the first comparator CMP1 is 0, and the selector U1 forwards the first output signal to the controller 101 as 0. When the circuit in the receiving mode is close to the transmitting end, a periodic resonant current will be generated in the resonant cavity 103, which will affect the level of the first end of the resonant cavity 103, that is, affect the level of the first level signal. When the first level signal is less than 0, the resonant current flows from the first end of the resonant cavity 103 to the second end (that is, the preset direction), and the first output signal is a high level. That is, the first output signal received by the controller 101 changes from 0 to a high level, and the receiving condition is started at this time, and a drive signal is sent to the rectifier unit 102 to drive it to work.

[0093] Based on the above, regarding the receiving working condition, the embodiment of the present application also provides a possible implementation method, please refer to Figure 4 to Figure 7 , the receiving condition includes the first receiving condition Second receiving condition And the third receiving condition

[0094] The third electrode of the first switch tube S1 is Figure 3 V G1 , the third electrode of the second switch tube S2 is as follows Figure 3 V G2 The third electrode of the third switch tube S3 is as follows Figure 3 V G3 , the third electrode of the fourth switch tube S4 is as follows Figure 3 V G4 .

[0095] The first receiving condition is that the controller 101 outputs a high-level signal to the third pole of the second switch tube S2 and the third pole of the fourth switch tube S4 to turn on the second switch tube S2 and the fourth switch tube S4, and outputs a low-level signal to the third pole of the first switch tube S1 and the third pole of the third switch tube S3 to turn off the first switch tube S1 and the third switch tube S3.

[0096] The second receiving condition is that the controller 101 outputs a low-level signal to the third pole of the second switch tube S2 and the third pole of the fourth switch tube S4 to disconnect the second switch tube S2 and the fourth switch tube S4, and outputs a high-level signal to the third pole of the first switch tube S1 and the third pole of the third switch tube S3 to connect the first switch tube S1 and the third switch tube S3.

[0097] The third receiving condition includes the first interval (corresponding to Figure 7 t2 in the second interval corresponds to Figure 7 Between t2 and t3 in the third interval Figure 7 (t3) in.

[0098] In the first interval, the controller 101 outputs a high-level signal to the third electrode of the fourth switch tube S4 to turn on the fourth switch tube S4, and outputs a low-level signal to the third electrode of the first switch tube S1, the third electrode of the second switch tube S2, and the third electrode of the third switch tube S3 to turn off the first switch tube S1, the second switch tube S2, and the third switch tube S3.

[0099] In the second interval, the controller 101 outputs a high-level signal to the third pole of the first switch tube S1 and the third pole of the fourth switch tube S4 to turn on the first switch tube S1 and the fourth switch tube S4, and outputs a low-level signal to the third pole of the second switch tube S2 and the third pole of the third switch tube S3 to turn off the second switch tube S2 and the third switch tube S3.

[0100] In the third interval, the controller 101 outputs a high-level signal to the third pole of the first switch tube S1 to turn off the first switch tube S1, and outputs a low-level signal to the third pole of the second switch tube S2, the third pole of the third switch tube S3, and the third pole of the fourth switch tube S4 to turn off the second switch tube S2, the third switch tube S3, and the fourth switch tube S4.

[0101] When the current operating condition is the first receiving operating condition, when the resonant current changes from a negative direction to a positive direction, the controller 101 is used to switch the first interval to a new current operating condition; when the first output signal changes from 0 to a high level, the controller 101 is used to switch the second interval to a new current operating condition.

[0102] When the second output signal changes from a high level to 0, the controller 101 is used to switch the third interval to a new current operating condition. After the first pole level of the third switch tube S3 is higher than the second pole level of the third switch tube S3, the controller 101 is used to switch the second receiving operating condition to the new current operating condition.

[0103] Specifically, when the first output signal changes from 0 to a high level, it indicates that the first level signal changes from greater than 0 to less than 0, and it is possible that the first level signal is close to 0 at this time. That is, the first end of the first switch tube S1 is grounded, that is, the level is 0, and the other end of the first switch tube S1 is the first end of the resonant cavity. The level of the first level signal is the level of the other end of the first switch tube S1. At this time, the voltage difference between the two ends of the first switch tube S1 is close to 0. At this time, the first switch tube S1 is switched to the on state, switching from the first interval to the second interval, to achieve zero voltage switching of the first switch tube S1.

[0104] Since the inductor current I L The existence of I L >I RX (resonant current), the zero voltage conduction of S3 becomes difficult. In order to achieve the zero voltage conduction of S3, it is necessary to perform the third receiving condition after the first receiving condition. By using a power inductor L1 with a smaller inductance, I L Can be reduced to I RX When S4 is turned off, I RX -I L The voltage level V at the second end of the resonant cavity 103 AC1 (Second level signal) is charged to a high voltage. After the first pole level of the third switch tube S3 is higher than the second pole level of the third switch tube S3, the controller 101 is used to switch the second receiving working state to a new current working state. S3 can be turned on under zero voltage.

[0105] Specifically, two input terminals of the third comparator may be connected to two poles of S3 respectively. When the output signal of the third comparator is 0 or 1, it indicates that the first pole level of the third switch tube S3 is higher than the second pole level.

[0106] The in-phase input terminal of the third comparator is connected to the first electrode of the third switch tube S3, and the inverting input terminal of the third comparator is connected to the second electrode of the third switch tube S3, or vice versa, which can be set according to the specific scenario.

[0107] It should be noted that the value of the power inductor L1 is related to the resonant frequency and needs to satisfy the inductor current I L When the value of is the smallest, it can be less than I RX (resonant current), so the value of the power inductor L1 is less than a specific threshold.

[0108] Please continue to refer to Figure 4 to Figure 7 , in Φ1, I RX In the negative half cycle, C FLY and the battery charges, the energy storage in L1 decreases and charges the battery. In Φ2, I RX In the positive half cycle and charging the battery, C FLY The current I DIS Transfer energy to L1. In Φ3, I RX The resonant coil oscillates freely, the energy stored in L1 decreases and charges the battery. The AC voltage V at the receiving end AC1 and V AC2 The amplitude is approximately equal to V DCH_RX Furthermore, the voltage conversion ratio A RX =V BAT_RX / V DCH_RX . When the rated power of the battery charging remains unchanged, when V DCH_RX When it increases, it helps to reduce I RX , thereby reducing consumption. RX Determined by the duty cycle D of S3. Figure 7 In the receiving condition combination shown in combination 1, the duty cycle of S3, D<0.5, so A RX <0.5.

[0109] Optionally, the voltage drop across the inductor L1 is ΔV L1 ,but:

[0110] ΔV L1 =V AC1 -V BAT_RX (1);

[0111] When S3 is turned on;

[0112] ΔV L1 =V DCH_RX -V BAT_RX (2);

[0113] At this time, the inductor L1 current, I L1 Rise, the rise amplitude is:

[0114]

[0115] Among them, T S3 is the switching cycle of S3;

[0116] When S3 is turned off and S4 is turned on;

[0117] ΔV L1 =-V BAT_RX , and ΔV L1 <0;

[0118] At this time, IL1 Decrease, the decrease amplitude is:

[0119]

[0120] When the circuit works in a stable state;

[0121] ΔI L1_ON =ΔI L1_OFF (5);

[0122] According to formulas (3), (4) and (5), we can deduce:

[0123] A RX =D.

[0124] In order to make V DCH_RX Increase, the present application embodiment also provides a possible implementation method, please continue to refer to Figure 7 ,like Figure 7 As shown in combination 2, the receiving condition also includes a fourth receiving condition.

[0125] The fourth receiving working condition is that the controller 101 outputs a high-level signal to the third pole of the first switch tube S1 and the third pole of the fourth switch tube S4 to turn on the first switch tube S1 and the fourth switch tube S4, and outputs a low-level signal to the third pole of the second switch tube S2 and the third pole of the third switch tube S3 to turn off the second switch tube S2 and the third switch tube S3.

[0126] When the current operating condition is the second receiving operating condition, when the resonant current changes from a positive direction to a negative direction, the controller 101 is used to switch the fourth receiving operating condition to a new current operating condition; after a preset time interval, the controller 101 is used to switch the first receiving operating condition to a new current operating condition, wherein the preset time interval is an integer multiple of the resonant current conversion period.

[0127] Specifically, in the fourth receiving working condition, the third switch tube S3 is turned off, and the duty cycle D of the third switch tube S3 is significantly reduced. Figure 7 As shown in combination 2, D < 0.25, so A RX <0.25, that is, V DCH_RX >4V BAT_RX When V DCH_RX When it increases, it decreases I RX , thereby reducing consumption.

[0128] On this basis, regarding how to achieve zero-voltage conduction of the second switch tube S2 when the current operating condition is switched from the fourth receiving operating condition to the first receiving operating condition, the embodiment of the present application also provides a possible implementation method, please refer to the following.

[0129] After the fourth receiving operating condition is used as the current operating condition for a preset time interval, the first switch tube S1 is turned off, and the first electrode level (first level signal) of the second switch tube S2 is higher than the second electrode level (V DCH_RX ), the second switch tube S2 is turned on, thereby realizing zero voltage turn-on of the second switch tube S2. The change of the first electrode level of the second switch tube S2 is as follows: Figure 7 Middle combination 2 middle t1 middle V AC2 shown.

[0130] Similarly, when the current operating condition switches from the second receiving operating condition to the first receiving operating condition, the fourth switch tube S4 is turned on at zero voltage. The embodiment of the present application also provides a possible implementation method, please refer to the following.

[0131] At the initial moment of switching, the third switch tube S3 is first turned off, and when the first pole level (second level signal) of the fourth switch tube S4 is lower than the second pole level (ground) of the fourth switch tube S4, the fourth switch tube S4 is turned on, thereby achieving zero voltage turn-on of the fourth switch tube S4. The change of the first pole level of the fourth switch tube S4 is as follows: Figure 7 Middle combination one middle t1 middle V AC1 shown.

[0132] It should be noted that the controller 101 can obtain the high and low relationship between the voltage levels of the second switch tube S2 and the voltage levels of the fourth switch tube S4 through the corresponding comparator, which will not be elaborated here.

[0133] In a possible implementation, the output end of the first comparator CMP1 is also directly connected to the controller 101 (ie, without the selector U1 ). When the mode signal is a transmission start signal, the selector U1 is used to forward the received clock signal (CLK) to the controller 101 .

[0134] The controller 101 is used for receiving the clock signal and outputting the first output signal, the second output signal and the discharge current (I TX ) to switch the current working state.

[0135] The emission conditions include a first emission condition (β1), a second emission condition (β2), and a third emission condition (β3), and possibly also a fourth emission condition (β4), please refer to Figure 8 to Figure 11 .

[0136] In the first transmitting condition, the controller 101 outputs a high-level signal to the third pole of the second switch tube S2 and the third pole of the fourth switch tube S4 to turn on the second switch tube S2 and the fourth switch tube S4, and outputs a low-level signal to the third pole of the first switch tube S1 and the third pole of the third switch tube S3 to turn off the first switch tube S1 and the third switch tube S3.

[0137] like Fig.11 As shown, in the first transmitting condition, the first level signal (V AC2 is high level) is approximately equal to V DCH_TX , the discharge current direction is negative, the first output signal output by the comparator U1 is 0, and the second level signal (V AC1 is low level) is approximately equal to 0.

[0138] The second transmitting condition is that the controller 101 outputs a low-level signal to the third pole of the second switch tube S2 and the third pole of the fourth switch tube S4 to disconnect the second switch tube S2 and the fourth switch tube S4, and outputs a high-level signal to the third pole of the first switch tube S1 and the third pole of the third switch tube S3 to connect the first switch tube S1 and the third switch tube S3.

[0139] like Fig.11 As shown, in the second transmitting condition, the first level signal (V AC2 is low level) is approximately equal to 0, the discharge current direction is positive, the first output signal output by the comparator U1 is 0, and at the same time, the second level signal (V AC1 is high level) is approximately equal to V DCH_TX .

[0140] The third emission condition is the same as the fourth emission condition, in which the controller 101 outputs a high-level signal to the third pole of the first switch tube S1 and the third pole of the fourth switch tube S4 to turn on the first switch tube S1 and the fourth switch tube S4, and outputs a low-level signal to the third pole of the second switch tube S2 and the third pole of the third switch tube S3 to turn off the second switch tube S2 and the third switch tube S3. It should be noted that the execution time of the third emission condition and the fourth emission condition is different.

[0141] Taking the current working condition as the second transmitting working condition as an example, when the first electrode level (V AC1 , the second level signal) is lower than the second pole level (V DCH_TX ), the third switch tube S3 is turned off, and when the first electrode level (V AC1 , the second level signal) is approximately equal to 0, the fourth switch tube S4 is turned on, that is, the current working state is switched from the second transmitting working state to the third transmitting working state. Among them, the first pole level (V AC1 , the second level signal) changes as Fig.11 As shown in t6.

[0142] like Fig.11 As shown in combination 1 in the figure, when the current working condition is the third transmitting working condition, when CLK becomes a high level, the first switch tube S1 is turned off, and the first pole level (V AC2, the first level signal) starts to rise. At the first level of the second switch tube S2 (V AC2 , the first level signal) is approximately equal to the second pole level (V DCH_TX ), the second switch tube S2 is turned on, that is, the current working state is switched from the third transmitting working state to the first transmitting working state. Among them, the first pole level (V AC2 , the first level signal) changes as Fig.11 As shown in t4.

[0143] Please continue to refer to Fig.11 When the current working condition is the first transmitting working condition, when CLK becomes low level, the second switch tube S2 is turned off, and the first pole level (V AC2 , the first level signal) starts to drop. At the first pole level (V AC2 , the first level signal) is approximately equal to the second pole level (0, ground) of the first switch tube S1, the fourth switch tube S4 is turned off and the first switch tube S1 is turned on, that is, the current working state is switched from the first transmitting working state to the second transmitting working state. Among them, the first pole level (V AC2 , the first level signal) changes as Fig.11 As shown in t5.

[0144] It should be noted that after the fourth switch tube S4 is turned off, V AC1 It will quickly rise to a high level and is approximately equal to V DCH_TX Then, the third switch tube S3 is turned on.

[0145] Referring to the receiving mode described above, due to the inductor current I L The existence of I L >I TX (discharge current), the zero voltage conduction of S4 becomes difficult. In order to achieve the zero voltage conduction of S4, it is necessary to perform the third transmission condition after the second transmission condition. By using a power inductor L1 with a smaller inductance, I L Can be reduced to I TX When S3 is turned off, the first level of the fourth switch tube S4 (V AC1 , the second level signal) continues to decrease until it is lower than 0. After the first pole level of the fourth switch tube S4 is approximately equal to the second pole level of the fourth switch tube S4 (0, ground), the controller 101 is used to turn on the fourth switch tube S4, and S4 can be turned on under zero voltage.

[0146] Continuing to refer to the previous receiving mode, in order to reduce the occupancy ratio of the third switch tube S3. The voltage conversion ratio of the transmitting mode, A TX =V DCH_TX / VBAT_TX ,exist Fig.11 In combination one the number is greater than 2, and in combination two the number is greater than 4.

[0147] Specifically, please refer to Fig.11 In combination two, after the third operating condition occurs, the fourth emission operating condition is connected, and when the discharge current changes from a positive direction to a negative direction, the controller 101 is used to switch the fourth emission operating condition to a new current operating condition; after a preset time interval, the controller 101 is used to switch the first emission operating condition to a new current operating condition, wherein the preset time interval is an integer multiple of the discharge current conversion period.

[0148] Please continue to refer to Figure 3 In a possible implementation, the rectifying unit 102 further includes a second capacitor C0, and two electrodes of the second capacitor C0 are respectively connected to the third end and the fourth end of the rectifying unit 102.

[0149] The second capacitor C0 is used for filtering and eliminating interference.

[0150] exist Figure 2 Based on the structure of the resonant cavity 103, the present application embodiment also provides a possible implementation method, please continue to refer to Figure 3 The resonant cavity 103 includes a resonant coil (L TX and L RX , corresponding to the transmitting mode and receiving mode respectively) and the resonant capacitor C RES One end of the resonant coil is connected to one pole of the resonant capacitor, and the other end of the resonant coil and the other pole of the resonant capacitor serve as the first end and the second end of the resonant cavity respectively.

[0151] Figure 3 In the embodiment, two poles of the resonant capacitor are respectively connected to one end of the resonant coil and one end of the inductor L1. In a possible implementation, two ends of the resonant coil are respectively connected to one pole of the resonant capacitor and one end of the inductor L1, which is not limited here.

[0152] It should be noted that, considering that the current flowing through the fourth switch tube S4 is relatively large, in order to ensure the service life and safety of the fourth switch tube S4, the fourth switch tube S4 adopts a gallium nitride transistor, and S1 to S3 adopt MOS tubes.

[0153] In a possible implementation, S1 and S4 are NMOS structures or similar structures, and S2 and S3 are PMOS structures or similar structures.

[0154] The embodiment of the present application also provides an electronic device. It should be noted that the electronic device includes the bidirectional wireless charging transceiver circuit 10 as described above. The electronic device provided in this embodiment can perform the functional purpose of the bidirectional wireless charging transceiver circuit 10 to achieve the corresponding technical effect. For the sake of brief description, for the parts not mentioned in this embodiment, please refer to the corresponding content in the above embodiment.

[0155] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0156] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present application. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A bidirectional wireless charging transceiver circuit, characterized in that: The bidirectional wireless charging transceiver circuit includes a controller, a resonant cavity and a rectifying unit; The first end of the resonant cavity is connected to the first end of the rectifier unit, the second end of the resonant cavity is connected to the second end of the rectifier unit, the third end and the fourth end of the rectifier unit are respectively connected to the positive electrode and the negative electrode of the battery, and the controller is connected to the rectifier unit; The controller is used to determine the current mode according to the mode signal, wherein the current mode includes a transmission mode and a reception mode, and the mode signal includes a transmission start signal corresponding to the transmission mode and a reception start signal corresponding to the reception mode; When the current mode is the transmitting mode, the controller is used to send a driving signal to the rectifying unit to drive the rectifying unit to rectify and regulate the discharge current released by the battery, and input the rectified and regulated discharge current into the resonant cavity; The resonant cavity is used to transmit energy to a corresponding receiving device after a discharge current flows into the cavity; When the current mode is a receiving mode, the resonant cavity is used to receive energy transmitted by a transmitting device and generate a resonant current; The controller is further configured to send a driving signal to the rectifier unit when the direction of the resonant current is a preset direction, so as to drive the rectifier unit to rectify and adjust the resonant current, and charge the battery through the rectified and adjusted resonant current; The rectifying unit includes a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, an inductor and a first capacitor; The first electrode of the first switch tube and the first electrode of the second switch tube are connected to one point as the first end of the rectifier unit, and the first electrode of the third switch tube and the first electrode of the fourth switch tube are connected to one point as the second end of the rectifier unit; The second electrode of the first switch tube and the second electrode of the fourth switch tube are both grounded; The second electrode of the second switch tube and the second electrode of the third switch tube are connected to one point, one electrode of the first capacitor is connected between the second electrode of the second switch tube and the second electrode of the third switch tube, and one end of the inductor is connected to the second end of the rectifier unit; The other end of the inductor serves as the third end of the rectifier unit, and the fourth end of the rectifier unit serves as the ground end; The other electrode of the first capacitor is connected to the third terminal of the rectifier unit or the ground; The third electrode of the first switch tube, the third electrode of the second switch tube, the third electrode of the third switch tube and the third electrode of the fourth switch tube are all connected to the controller; The controller is used to send a driving signal to the third pole of the first switch tube, the third pole of the second switch tube, the third pole of the third switch tube, and the third pole of the fourth switch tube according to the current working condition, so as to switch the working phase of the rectifier unit, wherein the current working condition is any one of the receiving working conditions corresponding to the receiving mode; The bidirectional wireless charging transceiver circuit also includes a first comparator, a second comparator and a selector, wherein the inverting input terminal of the first comparator is connected to the first end of the resonant cavity, the non-inverting input terminal of the first comparator is grounded, the output terminal of the first comparator is connected to the first input terminal of the selector, the output terminal of the selector is connected to the controller, the inverting input terminal of the second comparator is connected to the second end of the resonant cavity, the non-inverting input terminal of the second comparator is grounded, and the output terminal of the second comparator is connected to the controller; The second comparator is used to collect a second level signal at the second end of the resonant cavity, when the second level signal is greater than 0, the second output signal is 0, when the second level signal is less than 0, the second output signal is a high level, wherein the second output signal is the output signal of the second comparator; The first comparator is used to collect a first level signal at the first end of the resonant cavity, when the first level signal is greater than 0, the first output signal is 0, when the first level signal is less than 0, the first output signal is a high level, wherein the first output signal is the output signal of the first comparator; In the case where the mode signal is a receiving start signal, the selector is used to forward the first output signal to the controller; The controller is used to switch the current working state according to the first output signal, the second output signal and the resonant current.

2. The bidirectional wireless charging transceiver circuit according to claim 1, characterized in that: The receiving working conditions include a first receiving working condition, a second receiving working condition and a third receiving working condition; The first receiving condition is that the controller outputs a high level signal to the third electrode of the second switch tube and the third electrode of the fourth switch tube to turn on the second switch tube and the fourth switch tube, and outputs a low level signal to the third electrode of the first switch tube and the third electrode of the third switch tube to turn off the first switch tube and the third switch tube; The second receiving condition is that the controller outputs a low level signal to the third electrode of the second switch tube and the third electrode of the fourth switch tube to disconnect the second switch tube and the fourth switch tube, and outputs a high level signal to the third electrode of the first switch tube and the third electrode of the third switch tube to connect the first switch tube and the third switch tube; The third receiving condition includes a first interval, a second interval and a third interval; The first interval is when the controller outputs a high level signal to the third electrode of the fourth switch tube to turn on the fourth switch tube, and outputs a low level signal to the third electrode of the first switch tube, the third electrode of the second switch tube, and the third electrode of the third switch tube to turn off the first switch tube, the second switch tube, and the third switch tube; The second interval is when the controller outputs a high level signal to the third electrode of the first switch tube and the third electrode of the fourth switch tube to turn on the first switch tube and the fourth switch tube, and outputs a low level signal to the third electrode of the second switch tube and the third electrode of the third switch tube to turn off the second switch tube and the third switch tube; The third interval is when the controller outputs a high level signal to the third pole of the first switch tube to turn on the first switch tube, and outputs a low level signal to the third pole of the second switch tube, the third pole of the third switch tube, and the third pole of the fourth switch tube to turn off the second switch tube, the third switch tube, and the fourth switch tube; When the current operating condition is the first receiving operating condition, when the resonant current changes from a negative direction to a positive direction, the controller is used to switch the first interval to a new current operating condition; when the first output signal changes from 0 to a high level, the controller is used to switch the second interval to a new current operating condition; when the second output signal changes from a high level to 0, the controller is used to switch the third interval to a new current operating condition, and after the first pole level of the third switch tube is higher than the second pole level of the third switch tube, the controller is used to switch the second receiving operating condition to the new current operating condition.

3. The bidirectional wireless charging transceiver circuit according to claim 2, characterized in that: The receiving working condition also includes a fourth receiving working condition; The fourth receiving working condition is that the controller outputs a high level signal to the third electrode of the first switch tube and the third electrode of the fourth switch tube to turn on the first switch tube and the fourth switch tube, and outputs a low level signal to the third electrode of the second switch tube and the third electrode of the third switch tube to turn off the second switch tube and the third switch tube; When the current operating condition is the second receiving operating condition, when the resonant current changes from a positive direction to a negative direction, the controller is used to switch the fourth receiving operating condition to a new current operating condition; After a preset time interval, the controller is used to switch the first receiving operating condition to a new current operating condition, wherein the preset time interval is an integer multiple of the resonant current conversion period.

4. The bidirectional wireless charging transceiver circuit according to claim 1, characterized in that: The output end of the first comparator is also connected to the controller, and when the mode signal is a transmission start signal, the selector is used to forward the received clock signal to the controller; The controller is used to switch the current working state according to the first output signal, the second output signal and the discharge current after receiving the clock signal.

5. The bidirectional wireless charging transceiver circuit according to claim 1, characterized in that: The rectifying unit further includes a second capacitor, and two electrodes of the second capacitor are respectively connected to the third end and the fourth end of the rectifying unit.

6. The bidirectional wireless charging transceiver circuit according to claim 1, characterized in that: The resonant cavity includes a resonant coil and a resonant capacitor, one end of the resonant coil is connected to one pole of the resonant capacitor, and the other end of the resonant coil and the other pole of the resonant capacitor serve as the first end and the second end of the resonant cavity respectively.

7. An electronic device, characterized in that: The electronic device comprises the bidirectional wireless charging transceiver circuit according to any one of claims 1 to 6.

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