CN208337246U - Electric energy transmitting circuit, circuit module and the wireless charging device using it - Google Patents

Abstract

The utility model discloses a kind of electric energy transmitting circuit, circuit module and using its wireless charging device, pass through a resistance in parallel at least one capacitor, the electric energy transmitting circuit is enabled accurately to demodulate the signal of communication that electric energy receives electronic feedback according to capacitance voltage, to avoid negative effect of the nonlinear characteristic to voltage detecting of demodulator circuit, to improve the reliability of wireless charging device.

Description

Electric energy transmitting circuit, circuit module and the wireless charging device using it

Technical field

The utility model relates to electron electric power technologies, and in particular to wireless charging technology, more particularly, to a kind of electric energy Transmit circuit, circuit module and the wireless charging device using it.

Background technique

Wireless charging technology can wirelessly transmit electric energy between electronic devices, thus be widely used in consumption electricity In sub- product and other types of electronic product.

Wireless charging device receives circuit by electric energy transmitting circuit and electric energy and forms, and electric energy transmitting circuit excites the magnetic of alternation , it is load supplying that electric energy, which receives circuit and generates electromotive force according to alternating magnetic field,.In the operation of wireless charging device, electric energy hair Transmit-receive radio road needs to obtain electric energy and receives the information state of circuit, so that closed-loop system is constructed, in order to adjust electric energy transmitting in time The working condition of circuit enables electric energy to receive circuit and provides energy safely, correctly for load.

Electric energy, which receives circuit, can send electricity for information such as voltage, power, temperature by the working method of power disturbance It can transmit circuit.After electric energy transmitting circuit receives power of disturbance, the alternating current in transmitting coil will occur corresponding Variation, while the voltage on capacitor also disturbs occurrence law.Therefore, it is usually obtained at present by detecting the voltage of capacitor Electric energy receives the status information of circuit, and then adjusts the working condition of electric energy transmitting circuit.But with charging freedom degree demand The promotion vertical range and horizontal-shift of charging (increase), power needed for transmitting coil is increasing, thus needs to increase Add transmitting coil sensibility reciprocal and improves the electric current in transmitting coil to increase the space magnetic field around transmitting coil.In order to reduce coil With the pressure resistance of capacitor, often by the way of multiple series capacitance retarders.But if the electricity on single capacitor is detected at this time Pressure tends not to correctly demodulate the status information that electric energy receives circuit to demodulate the communication information.

Utility model content

In view of this, the present invention provides a kind of electric energy transmitting circuit, circuit module and using its wireless charging Denso It sets, to avoid negative effect of the nonlinear characteristic to voltage detecting of demodulator circuit, to improve the reliable of wireless charging device Property.

In a first aspect, providing a kind of electric energy transmitting circuit, comprising:

Multiple coils；

1 first capacitor；

N number of second capacitor, N are greater than or equal to 1；And

At least one resistance, it is in parallel with the first capacitor and/or second capacitor respectively；

Demodulator circuit is configured as detection demodulation voltage and obtains signal of communication, and the demodulation voltage is used to characterize described the The voltage of one capacitor；

Inverter circuit is configured as controlled output high-frequency alternating current；And

Controller is configured as controlling the inverter circuit according to the signal of communication；

Wherein, the coil, first capacitor and the second capacitor are connected in a manner of being spaced apart from each other.

Further, at least one described resistance is in parallel with the first capacitor.

Further, the quantity of the resistance is 1, and the resistance is in parallel with the first capacitor.

Further, the quantity of the resistance is greater than 1, one of them described resistance is in parallel with the first capacitor, other Resistance is in parallel with corresponding second capacitor respectively.

Further, the quantity of the resistance is N, and N number of resistance is in parallel with N number of second capacitor respectively.

Further, the quantity of the coil is N or N+1.

Further, the resistance value of the resistance is configured such that the demodulation voltage in scheduled DC offset voltage model In enclosing.

Further, the demodulator circuit includes:

Peak detection circuit is connect with the first capacitor, is configured as obtaining the demodulation voltage and is detected the solution Adjust the peak signal of voltage；

Amplifying circuit is connect with the peak detection circuit, is configured as by amplifying described in the peak signal generation Signal of communication.

Second aspect provides a kind of circuit module, comprising:

Multiple coils；

One first capacitor；

N number of second capacitor, N are greater than or equal to 1；And at least one resistance, respectively with the first capacitor and/or described Second capacitor is in parallel；

Wherein, the coil, first capacitor and the second capacitor are connected in a manner of being spaced apart from each other.

The third aspect provides a kind of wireless charging device, comprising:

Electric energy transmitting circuit as described above；And

Electric energy receives circuit, is configured as generating predeterminated voltage powering load.

The technical solution of the utility model is by a resistance in parallel at least one capacitor, so that the electric energy emits Circuit can accurately demodulate the signal of communication that electric energy receives electronic feedback according to capacitance voltage, to avoid the non-thread of demodulator circuit Negative effect of the property characteristic to voltage detecting, to improve the reliability of wireless charging device.

Detailed description of the invention

By referring to the drawings to the description of the utility model embodiment, the above-mentioned and other mesh of the utility model , feature and advantage will be apparent from, in the accompanying drawings:

Fig. 1 is the schematic diagram of the electric energy transmitting circuit of a comparative example；

Fig. 2 is the waveform diagram of the capacitance voltage in comparative example；

Fig. 3 is the schematic diagram of the electric energy transmitting circuit of the utility model first embodiment；

Fig. 4 is a kind of schematic diagram of peak detection circuit；

Fig. 5 is the capacitance voltage of the utility model first embodiment and the waveform diagram of its peak value；

Fig. 6 is the schematic diagram of the electric energy transmitting circuit of the utility model second embodiment；

Fig. 7 is the schematic diagram of the electric energy transmitting circuit of the utility model 3rd embodiment；

Fig. 8 is the schematic diagram of the electric energy transmitting circuit of the utility model 3rd embodiment；

Fig. 9 is the schematic diagram of the wireless charging device of the utility model embodiment.

Specific embodiment

The utility model is described below based on embodiment, but the utility model is not restricted to these implementations Example.It is detailed to describe some specific detail sections below in the datail description of the utility model.To those skilled in the art The utility model can also be understood completely in the description of part without these details for member.In order to avoid obscuring the utility model Essence, there is no narrations in detail for well known method, process, process, element and circuit.

In addition, it should be understood by one skilled in the art that provided herein attached drawing be provided to explanation purpose, and What attached drawing was not necessarily drawn to scale.

It will also be appreciated that in the following description, " circuit " refers to be passed through electrically by least one element or sub-circuit The galvanic circle that connection or electromagnetism connect and compose.When title element or the " connection of another element of circuit " being connected to " or element/circuit " between two nodes when, it, which can be, is directly coupled or connected another element or there may be intermediary element, element it Between connection can be physically, in logic or its combination.On the contrary, when claiming element " being directly coupled to " or " directly connecting Be connected to " another element when, it is meant that the two be not present intermediary element.

Unless the context clearly requires otherwise, "include", "comprise" otherwise throughout the specification and claims etc. are similar Word should be construed as the meaning for including rather than exclusive or exhaustive meaning；That is, be " including but not limited to " contains Justice.

In the description of the present invention, it should be understood that term " first ", " second " etc. are used for description purposes only, It is not understood to indicate or imply relative importance.In addition, in the description of the present invention, unless otherwise indicated, it is " more It is a " it is meant that two or more.

Fig. 1 is the schematic diagram of the electric energy transmitting circuit of a comparative example.Fig. 2 is the waveform of the capacitance voltage in comparative example Figure.As shown in Figure 1, this comparative example improves the space magnetic field around transmitting coil in the form of increasing transmitting coil to increase The power of transmitting coil, to improve the charging freedom degree of charging equipment.In order to avoid the parasitic capacitance between multiple inductance, originally Comparative example use multiple capacitors and multiple inductance by it is mutually isolated it is concatenated in a manner of.Meanwhile this connection type can also drop The resistance to pressure request of low coil and capacitor.In the electric energy transmitting circuit connected in this way, passing through voltage/power disturbance Mode when receiving the communication of circuit and electric energy transmitting circuit to carry out electric energy, since the nonlinear load of demodulator circuit 11 is special Property, the voltage for the single capacitor C1 that acquisition can be made to obtain is as shown in Figure 2.

Obviously, the voltage disturbance ripple on the capacitor C1 in Fig. 1 is unable to the power disturbance that accurate characterization electric energy receives circuit, Therefore, the peak detection circuit 111 in demodulator circuit 11 cannot obtain accurate peak signal, cause demodulator circuit 11 cannot be just Really demodulation communication information, and then influence the reliability of wireless charging device.

Voltage/power disturbance refers to the output power or output voltage that circuit is received by changing electric energy, so that electric energy is sent out The output parameter of the emitting side resonance circuit of transmit-receive radio road accordingly changes.Pass through the defeated of detection emitting side resonance circuit as a result, Parameter can obtain feedback information out.For example, circuit side is received according to feedback information coding come short circuit load by electric energy, The output electric current of electric energy transmitting circuit can be made to change with the load that electric energy receives circuit and changed, therefore transmitting can be passed through The variation of the peak value of the electric current of side resonance circuit receives the output power of circuit to detect electric energy, so that obtaining electric energy receives circuit Status information.

In the utility model embodiment, by least on a capacitor parallel resistance to avoid demodulator circuit for The influence of DC offset voltage, so that peak detection circuit can obtain accurately demodulation voltage, so that control Device processed, which can control inverter, makes it export high-frequency alternating current to improve the reliability of wireless charging device.Wherein, voltage is demodulated For characterizing the voltage of measured capacitance.High-frequency alternating current is above the alternating current of preset frequency, is used for so that emitting side resonance electricity Road (the emitting side resonance circuit of capacitor C1, C2, C3 as shown in Figure 1 and coil L1, L2 composition) generates scheduled alternating magnetic field, So that electric energy, which receives circuit, generates scheduled voltage powering load.

Fig. 3 is the schematic diagram of the electric energy transmitting circuit of the utility model first embodiment.Fig. 4 is a kind of peak detection circuit Schematic diagram.Fig. 5 is the capacitance voltage of the utility model first embodiment and the waveform diagram of its peak value.As shown in figure 3, this implementation Example electric energy transmitting circuit be configured as wirelessly emitting electric energy, including inverter 31, demodulator circuit 32, controller 33 with And circuit module 34.Wherein, demodulator circuit 32 includes peak detection circuit 321 and amplifying circuit 322.Circuit module 34 includes electricity Hold Cs1, capacitor Cs2, capacitor Cs3, coil L1, coil L2 and resistance R.

The present embodiment is using capacitor Cs1 as measured capacitance, and resistance is in parallel with capacitor Cs1 is illustrated.It should be understood that capacitor Cs2 and capacitor Cs3 also can be used as measured capacitance.When the capacitor quantity in electric energy transmitting circuit is greater than 2 and only one electricity in parallel When resistance, resistance should be connected in parallel in measured resistance.

Inverter 31 is connect with input port, is configured as being controlled by the control signal PWM of the output of controller 33 for direct current Input Vin is converted to high-frequency ac electricity output, to adjust alternating magnetic field, so that electric energy, which receives circuit, generates predeterminated voltage. In a kind of optional embodiment, inverter 31 is additionally configured to provide electric energy to controller 33.

In circuit module 34, capacitor Cs1, capacitor Cs2, capacitor Cs3, coil L1 and coil L2 are in mutually isolated mode It is connected in series.Preferably, capacitor Cs1, capacitor Cs2, capacitor Cs3, coil L1 and coil the L2 resonance near working frequency, to mention High electric energy efficiency of transmission.Resistance R is connected in parallel with capacitor Cs1.Wherein, the resistance value of resistance R is configured such that demodulation voltage exists Within the scope of scheduled DC offset voltage, namely the equivalent nonlinear impedance for making the resistance value of resistance R be much smaller than demodulator circuit 32, To reduce or eliminate negative effect of the nonlinear characteristic to voltage detecting of demodulator circuit 32, so that peak detection circuit 321 can relatively accurately obtain demodulation voltage Vcs.Wherein, demodulation voltage is used to characterize the voltage of capacitor Cs1.In capacitor Cs1 After a upper resistance R in parallel, so that the direct current biasing of electric current is flowed through from resistance R in electric energy transmitting circuit, and hardly from solution It adjusts circuit 32 to flow through, therefore, can be received in circuit by the voltage on detection capacitor Cs1 relatively accurately to detect electric energy Power disturbance.

Peak detection circuit 321 is connect with capacitor Cs1, is configured as the peak signal Vp of detection demodulation voltage Vcs.At this In embodiment, demodulation voltage Vcs is the voltage obtained from capacitor one end.It should be understood that demodulation voltage Vcs is also possible to other sides The signal for the characterization capacitor Cs1 both end voltage that formula acquires indirectly.Amplifying circuit 322 is connect with peak detection circuit 321, is configured To amplify peak signal Vp to generate signal of communication Va.

In a kind of optional embodiment, the circuit diagram of peak detection circuit 321 is as shown in figure 4, peak detection circuit 321 include diode D, resistance R41, capacitor C41 and resistance R42.Diode D is connected between capacitor Cs1 and resistance R41, electricity Hold C41 and resistance R42 to be connected in parallel between resistance R41 and ground terminal.Wherein, diode D and capacitor C41 constitutes sampling and keeps Circuit is charged to crest voltage on capacitor C41 when demodulating voltage Vcs and reaching peak value, and after the peak value past, demodulates voltage Vcs remains unchanged the voltage on capacitor C41 when declining, and is not influenced by capacitor demodulation voltage Vcs decline, to export peak Value signal Vp.It should be understood that the circuit structure of the crest voltage of other available capacitor Cs1 can be applied to the present embodiment In.

Controller 33 is configured as generating control signal PWM according to signal of communication Va to control inverter, so that electric Circuit can be received and generate predeterminated voltage, and then improve the reliability of wireless charging device.

Electric energy, which receives circuit, can send electricity for information such as voltage, power, temperature by way of voltage/power disturbance It can transmit circuit.Specifically, electric energy, which receives circuit, (can may be implemented electricity by modes such as short circuit loads after power of disturbance Pressure/power disturbance), the alternating current in coil L1 and coil L2 in electric energy transmitting circuit will occur to receive circuit with electric energy The corresponding transformation of power disturbance, meanwhile, the voltage on capacitor Cs1, Cs2 and Cs3 also disturbs occurrence law.Therefore, lead to The communication between electric energy reception circuit and electric energy transmitting circuit may be implemented in the voltage crossed on detection capacitor Cs1, Cs2 or Cs3.This The waveform diagram of capacitance voltage and its peak signal in embodiment is as shown in figure 5, the demodulation voltage Vcs that sampling obtains passes through peak value Peak signal Vp is obtained after the processing of detection circuit 321, peak signal Vp is communicated after the processing of amplifying circuit 322 Signal Va.Controller 33 demodulates the information pair such as voltage, power and temperature comprising electric energy reception circuit according to signal of communication Va The digital signal (namely control signal PWM) answered, and inverter is controlled according to this digital signal, so that the electric energy connects It receives circuit and generates predeterminated voltage, improve the reliability of wireless charging device.

Fig. 6 is the schematic diagram of the electric energy transmitting circuit of the utility model second embodiment.As shown in fig. 6, the present embodiment Electric energy transmitting circuit distinguishes the circuit module 64 being in the utility model embodiment with the electric energy transmitting circuit in Fig. 3 Resistance R2.The connection of other circuits (including circuits and circuit elements such as inverter 61, peak detection circuit 62 and controllers 63) Mode and working method are similar with electric energy transmitting circuit shown in Fig. 3, and details are not described herein.

In the present embodiment, capacitor Cs1 is measured capacitance, and resistance R1, R2 are in parallel with capacitor Cs1 and capacitor Cs2 respectively to be connected It connects.It should be understood that capacitor Cs2 and capacitor Cs3 also can be used as measured capacitance, but a resistance must be parallel in measured capacitance.

The resistance value of resistance R1 and resistance R2, which is configured such that, demodulates voltage within the scope of scheduled DC offset voltage, I.e. so that the resistance value of resistance R1 and/or R2 are much smaller than the equivalent nonlinear impedance of demodulator circuit 62, to reduce or eliminate demodulation electricity Influence of the road 62 for DC offset voltage, so that peak detection circuit 621 can relatively accurately obtain demodulation voltage Vcs.Wherein, demodulation voltage Vcs is used to characterize the voltage of capacitor Cs1.

The present embodiment is connected in parallel in measured capacitance and any one other capacitor respectively by the way that two resistance are arranged, so that electric energy Transmit circuit can more accurately obtain demodulation voltage, so that more accurately obtaining signal of communication controls inverter, to avoid Negative effect of the nonlinear characteristic of demodulator circuit 62 to voltage detecting, further improves the reliability of wireless charging device.

Fig. 7 is the schematic diagram of the electric energy transmitting circuit of the utility model 3rd embodiment.As shown in fig. 7, the present embodiment Electric energy transmitting circuit distinguishes the circuit module 74 being in the utility model embodiment with the electric energy transmitting circuit in Fig. 6 Resistance R3.The connection of other circuits (including circuits and circuit elements such as inverter 71, peak detection circuit 72 and controllers 73) Mode and working method are similar with electric energy transmitting circuit shown in fig. 6, and details are not described herein.

In the present embodiment, capacitor Cs1, capacitor Cs2 and capacitor Cs3 a resistance in parallel uses capacitor in Fig. 7 Cs1 is as measured capacitance.It should be understood that in the present embodiment, any one capacitor can be used as measured capacitance and demodulator circuit connects It connects.

Wherein, the resistance value of resistance R1, R2 and R3 is configured such that demodulation voltage Vcs in scheduled DC offset voltage model In enclosing, namely the equivalent nonlinear impedance for making the resistance value of resistance R1 and/or R2 and/or R3 be much smaller than demodulator circuit 72, to subtract Influence small or that elimination demodulator circuit 72 is for DC offset voltage, so that peak detection circuit 721 can be more accurate Ground obtains demodulation voltage Vcs.Wherein, demodulation voltage Vcs is used to characterize the voltage of capacitor Cs1.

The present embodiment is connected in parallel on capacitor Cs1, Cs2 and Cs3 respectively by the way that three resistance R1, R2 and R3 are arranged, so that electric Energy transmit circuit can more accurately obtain demodulation voltage, to obtain signal of communication more accurately to control inverter, avoid Negative effect of the nonlinear characteristic of demodulator circuit 72 to voltage detecting, further improves the reliable of wireless charging device Property.Make the connection type of demodulator circuit that there is diversity simultaneously, design circuit is more convenient.

Fig. 8 is the schematic diagram of the electric energy transmitting circuit of the utility model fourth embodiment.As shown in figure 8, the present embodiment Electric energy transmitting circuit is with the electric energy transmitting circuit difference in Fig. 6, in the utility model embodiment, on measured capacitance Cs1 Non- parallel resistance.A capacitor has been connected in parallel on other all capacitor Cs2 and Cs3.Other circuits (including inverter 81, Circuits and the circuit elements such as peak detection circuit 82 and controller 83) connection type and working method with electricity shown in fig. 6 Energy transmit circuit is similar, and details are not described herein.

In the present embodiment using capacitor Cs1 as measured capacitance.It should be understood that capacitor Cs2 and Cs3 also can be used as tested electricity Hold, but not parallel resistance in measured capacitance, resistance must be parallel on other all capacitors.

Due to being parallel with resistance R2 and R3 respectively on capacitor Cs2 and capacitor Cs3, electric current in electric energy transmitting circuit Direct current biasing is flowed through from R2 and R3, therefore the direct current biasing is fixed, so that demodulator circuit 82 can pass through detection The voltage of capacitor Cs1 demodulates the demodulated signal for receiving the status information of circuit for characterizing electric energy.

Wherein, the resistance value of resistance R1 and R2, which is configured such that, demodulates voltage within the scope of scheduled DC offset voltage, Namely make the resistance value of resistance R1 and/or R2 and/or R3 much smaller than the equivalent nonlinear impedance of demodulator circuit 82, to reduce or disappear The demodulator circuit 82 of influence except to(for) DC offset voltage, so that peak detection circuit 821 can be obtained relatively accurately Demodulate voltage.Wherein, demodulation voltage is used to characterize the voltage of capacitor Cs1.

In the utility model embodiment, electric energy transmitting circuit may include multiple coils, first capacitor (namely by Survey capacitor), N number of second capacitor and at least one resistance, N is greater than or equal to 1.Wherein, coil, first capacitor and the second capacitor It is connected in series in mutually isolated mode, therefore the quantity of coil can be N number of or N+1.

Further, at least one resistance is in parallel with first capacitor.In the first optional embodiment, the number of resistance Amount is 1, and when the quantity of the second capacitor is also 1, which be can be connected in parallel in first capacitor, also be can be connected in parallel the On two capacitors.When the quantity of resistance is 1, and the quantity of the second capacitor is greater than 1, which is connected in parallel with first capacitor.

In second of optional embodiment, when the quantity of resistance is greater than 1, one of resistance and first capacitor are simultaneously Connection, other resistance are in parallel with corresponding second capacitor respectively.It should be understood that the second capacitor of corresponding number can arbitrarily be selected to distinguish It is connected in parallel with residual resistance.Further, when the quantity of resistance is N+1, N+1 resistance respectively with first capacitor and N number of Second capacitor is connected in parallel.In the third optional embodiment, when the quantity of resistance is N, N number of resistance is respectively with N number of the Two capacitors are connected in parallel.

When first capacitor is parallel with resistance, so that the direct current biasing of electric current is flowed through from the resistance in electric energy transmitting circuit, And hardly flowed through from demodulator circuit, therefore, electricity can relatively accurately be detected by the voltage in detection first capacitor The power disturbance in circuit can be received.

It is electric in electric energy transmitting circuit when N number of resistance is connected in parallel with N number of second capacitor respectively when the quantity of resistance is N The direct current biasing of stream is flowed through from the second capacitor resistance in parallel, therefore the direct current biasing is fixed, so that The power disturbance in electric energy reception circuit is relatively accurately detected by the voltage in detection first capacitor.

Further, all resistance in parallel with capacitor are configured such that demodulation voltage predetermined in electric energy transmitting circuit DC offset voltage within the scope of, namely make resistance resistance value be much smaller than demodulator circuit equivalent nonlinear impedance, with reduce Or negative effect of the nonlinear characteristic of demodulator circuit to voltage detecting is eliminated, so that peak detection circuit can be compared with subject to Demodulation voltage really is obtained, to obtain signal of communication more accurately to control inverter, is produced so that electric energy receives circuit Raw predeterminated voltage, improves the reliability of wireless charging device.Wherein, demodulation voltage is used to characterize the voltage of measured capacitance.

Fig. 9 is the schematic diagram of the wireless charging device of the utility model embodiment.As shown in figure 9, the utility model is implemented The wireless charging device of example includes that electric energy transmitting circuit 1 and electric energy receive circuit 2.Wherein, electric energy transmitting circuit 1 be configured as with Wirelessly emit electric energy, electric energy receives circuit 2 and is configured as wirelessly receiving electric energy.Electric energy transmitting circuit 1 can With using the electric energy transmitting circuit in any of the above-described a embodiment or embodiment, details are not described herein.

In one embodiment, electric energy receive circuit 2 can by switch S according to feedback information coding come short circuit load To generate the power disturbance of regularity, so that the status informations such as voltage, power and temperature are transmitted in electric energy transmitting circuit 1. Electric energy transmitting circuit 1 obtains demodulated signal by the voltage on detection capacitor Cs1, and inversion electricity is controlled according to demodulated signal Road, so that electric energy, which receives circuit 1, generates scheduled voltage to charge to load, to improve wireless charging device Reliability.

The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, for this field For technical staff, the utility model can have various modifications and changes.All institutes within the spirit and principle of the utility model Any modification, equivalent substitution, improvement and etc. of work, should be included within the scope of protection of this utility model.

Claims (10)

1. a kind of electric energy transmitting circuit, comprising:

Multiple coils；

1 first capacitor；

N number of second capacitor, N are greater than or equal to 1；And

At least one resistance, it is in parallel with the first capacitor and/or second capacitor respectively；

Demodulator circuit is configured as detection demodulation voltage and obtains signal of communication, and the demodulation voltage is for characterizing first electricity The voltage of appearance；

Inverter circuit is configured as controlled output high-frequency alternating current；And

Controller is configured as controlling the inverter circuit according to the signal of communication；

Wherein, the coil, first capacitor and the second capacitor are connected in a manner of being spaced apart from each other.

2. electric energy transmitting circuit according to claim 1, which is characterized in that at least one described resistance and first electricity Hold in parallel.

3. electric energy transmitting circuit according to claim 2, which is characterized in that the quantity of the resistance be 1, the resistance with The first capacitor is in parallel.

4. electric energy transmitting circuit according to claim 2, which is characterized in that the quantity of the resistance is greater than 1, one of them The resistance is in parallel with the first capacitor, and other resistance are in parallel with corresponding second capacitor respectively.

5. electric energy transmitting circuit according to claim 1, which is characterized in that the quantity of the resistance is N, N number of electricity It hinders in parallel with N number of second capacitor respectively.

6. electric energy transmitting circuit according to any one of claims 1-5, which is characterized in that the quantity of the coil is N Or N+1.

7. electric energy transmitting circuit according to claim 1, which is characterized in that the resistance value of the resistance is configured such that institute Demodulation voltage is stated within the scope of scheduled DC offset voltage.

8. electric energy transmitting circuit according to claim 7, which is characterized in that the demodulator circuit includes:

Peak detection circuit is connect with the first capacitor, is configured as obtaining the demodulation voltage and is detected the demodulation electricity The peak signal of pressure；

Amplifying circuit is connect with the peak detection circuit, is configured as generating the communication by amplifying the peak signal Signal.

9. a kind of circuit module, comprising:

Multiple coils；

One first capacitor；

N number of second capacitor, N are greater than or equal to 1；And at least one resistance, respectively with the first capacitor and/or described second Capacitor is in parallel；

Wherein, the coil, first capacitor and the second capacitor are connected in a manner of being spaced apart from each other.

10. a kind of wireless charging device, comprising:

Electric energy transmitting circuit as claimed in any one of claims 1-9 wherein；And

Electric energy receives circuit, is configured as generating predeterminated voltage powering load.