CN116031961A

CN116031961A - Charging circuit, terminal device and control method of charging circuit

Info

Publication number: CN116031961A
Application number: CN202111252345.2A
Authority: CN
Inventors: 高思佳
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2021-10-26
Filing date: 2021-10-26
Publication date: 2023-04-28

Abstract

The present disclosure relates to a charging circuit, a terminal device, and a control method of the charging circuit, the charging circuit including: a first circuit including a first capacitor assembly and a first switch assembly; a second circuit including a second capacitor assembly and a second switch assembly; the input end of the first circuit and the input end of the second circuit are connected with a direct current power supply so that the direct current power supply supplies power for the first capacitor assembly and the second capacitor assembly; the first switch component and the second switch component are switched according to a preset time period, and the switch states of the first switch component and the second switch component in the same time period are different; the first capacitor assembly and the second capacitor assembly are connected with the battery to be charged, and when the first switch assembly is in a first state and the second switch assembly is in a second state, the first capacitor assembly discharges; the second capacitive component discharges when the first switching component is in the second state and the second switching component is in the first state.

Description

Charging circuit, terminal device and control method of charging circuit

Technical Field

The disclosure relates to the field of charging technologies, and in particular, to a charging circuit, a terminal device, and a control method of the charging circuit.

Background

At present, along with the improvement of a charging technology of terminal equipment, the charging power of the terminal equipment is larger and larger, the current carrying of a charging loop is larger and larger, the circuit loss of the terminal equipment in the charging process is obviously improved, and the charging efficiency is reduced. The improvement of the charging power has reached a bottleneck due to the limitation of the current carrying capacity of the charging circuit; and along with the improvement of the charging power, the output ripple is increased, which is unfavorable for the charging safety.

Disclosure of Invention

The disclosure provides a charging circuit, a terminal device, a control method, a device and a storage medium of the charging circuit.

According to a first aspect of embodiments of the present disclosure, there is provided a charging circuit comprising:

a first circuit including a first capacitive component and a first switching component connected to the first capacitive component;

a second circuit including a second capacitive component and a second switching component connected to the second capacitive component;

the input end of the first circuit and the input end of the second circuit are connected with a direct current power supply, so that the direct current power supply supplies power for the first capacitor assembly and the second capacitor assembly;

the first switch assembly and the second switch assembly are switched according to a preset time period, and the switch states of the first switch assembly and the second switch assembly are different in the same time period;

The first capacitor assembly and the second capacitor assembly are connected with a battery to be charged, and when the first switch assembly is in a first state and the second switch assembly is in a second state, the first capacitor assembly discharges; the second capacitive component discharges when the first switch component is in the second state and the second switch component is in the first state.

Optionally, the first switch assembly includes: a first controlled switch assembly and a second controlled switch assembly;

the second switch assembly includes: a third controlled switch assembly and a fourth controlled switch assembly;

when the first switch component is in the first state and the second switch component is in the second state, the first controlled switch component and the fourth controlled switch component are disconnected, and the second controlled switch component and the third controlled switch component are conducted;

when the first switch component is in the second state and the second switch component is in the first state, the first controlled switch component and the fourth controlled switch component are conducted, and the second controlled switch component and the third controlled switch component are disconnected.

Optionally, the first capacitive component includes: a plurality of first capacitors; the second capacitive component includes: a plurality of second capacitors;

the first switch component is in the first state and the second switch component is in the second state, and the first capacitors in the first circuit are connected in parallel to form a plurality of charging loops to charge the battery; the second capacitors in the second circuit are connected in series to receive the charge of the direct current power supply;

the first switch component is in the second state, the second switch component is in the first state, and the first capacitors in the first circuit are connected in series to receive the charge of the direct current power supply; and the second capacitors in the second circuit are connected in parallel to form a plurality of charging loops for charging the battery.

Optionally, a ratio of the input voltage and the output voltage of the charging circuit is positively correlated with the number of the first capacitors and/or the second capacitors.

Optionally, the circuit further comprises:

the switch control circuit is connected with the first controlled switch assembly, the second controlled switch assembly, the third controlled switch assembly and the fourth controlled switch assembly;

The switch control circuit is used for outputting a first control signal to the first controlled switch assembly and the fourth controlled switch assembly respectively, and outputting a second control signal to the second controlled switch assembly and the third controlled switch assembly; the second control signal is an inverted signal formed in an inverted manner with respect to the first control signal.

Optionally, the switch control circuit includes:

and a clock signal generating circuit for generating the first control signal varying in a time domain and forming the second control signal by inverting the first control signal.

Optionally, the first circuit further includes: the first unidirectional conduction element is connected between the first capacitance component and the positive electrode of the battery to be charged and is used for allowing the charging current output by the first capacitance component to flow to the battery in a unidirectional way;

the second circuit further includes: and the second unidirectional conduction element is connected between the second capacitance component and the positive electrode of the battery to be charged and is used for allowing the charging current output by the second capacitance component to flow to the battery in a unidirectional way.

According to a second aspect of embodiments of the present disclosure, there is provided a terminal device, including:

A charging circuit as described in the first aspect of the embodiments of the present disclosure;

and the battery is connected with the charging circuit and used for receiving the charging of the charging circuit.

According to a third aspect of the embodiments of the present disclosure, there is provided a control method of a charging circuit, which is applied to the charging circuit of the first aspect of the embodiments of the present disclosure, including:

alternately controlling the first switch assembly and the second switch assembly to switch between a first state and a second state according to a preset time period, wherein the states of the first switch assembly and the second switch assembly are different in the same time period;

charging a battery to be charged by a first capacitor assembly in a first line when the first switch assembly is in the first state and the second switch assembly is in the second state;

and when the first switch component is in the second state and the second switch component is in the first state, the second capacitor component in the second circuit charges the battery to be charged.

Optionally, the charging the battery to be charged by the first capacitor assembly in the first line when the first switch assembly is in the first state and the second switch assembly is in the second state includes:

When the first controlled switch assembly and the fourth controlled switch assembly are turned on and the second controlled switch assembly and the third controlled switch assembly are turned off, a plurality of charging loops formed by a plurality of first capacitors connected in parallel in a first circuit charge the battery; and a plurality of second capacitors connected in series in the second circuit receive the charge of the direct current power supply;

the charging of the battery to be charged by the second capacitor assembly in the second line while the first switch assembly is in the second state and the second switch assembly is in the first state includes:

when the first controlled switch assembly and the fourth controlled switch assembly are disconnected and the second controlled switch assembly and the third controlled switch assembly are conducted, a plurality of charging loops formed by a plurality of second capacitors connected in parallel in the second circuit charge the battery; and a plurality of first capacitors connected in series in the first line receive the charging of the direct current power supply.

According to a fourth aspect of embodiments of the present disclosure, there is provided a control device for a charging circuit, which is applied to the charging circuit in the first aspect of embodiments of the present disclosure, the method includes:

the control module is used for alternately controlling the first switch assembly and the second switch assembly to switch between a first state and a second state according to a preset time period, and the states of the first switch assembly and the second switch assembly are different and the switching frequency is the same in the same time period;

The charging module is used for charging the battery to be charged by the first capacitor component in the first circuit when the first switch component is in the first state and the second switch component is in the second state; and when the first switch component is in the second state and the second switch component is in the first state, the second capacitor component in the second circuit charges the battery to be charged.

According to a fifth aspect of the embodiments of the present disclosure, there is provided a control device of a charging circuit, including:

a processor;

a memory for storing executable instructions;

the processor is configured to: the executable instructions, when executed, implement the steps in the method according to the third aspect of the embodiments of the present disclosure.

According to a sixth aspect of the disclosed embodiments, there is provided a non-transitory computer readable storage medium, which when executed by a processor of an electronic device, causes the electronic device to perform the steps in the method according to the third aspect of the disclosed embodiments.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects:

in the embodiment of the disclosure, by arranging the first circuit and the second circuit in parallel in the charging circuit and controlling the first switch component on the first circuit and the second switch component on the second circuit to alternately work in different states according to the preset time period, the first capacitor component on the first circuit and the second capacitor component on the second circuit alternately charge the battery, and under the condition that the switching frequency of the first switch component and the second switch component is kept unchanged (that is, the switching frequency of each switch device on the first circuit and the second circuit is unchanged), the switching frequency of the whole charging circuit is improved, ripple waves are effectively reduced, and the charging efficiency and the charging safety of the charging circuit are improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic circuit diagram of a charging circuit of the related art.

Fig. 2 is a circuit diagram of a charging circuit according to the related art.

Fig. 3 is a circuit schematic diagram of a charging circuit according to an exemplary embodiment.

Fig. 4 is a circuit schematic diagram two of a charging circuit according to an exemplary embodiment.

Fig. 5 is a timing diagram of a first control signal and a second control signal according to an exemplary embodiment.

Fig. 6 is a flow chart illustrating a control method of a charging circuit according to an exemplary embodiment.

Fig. 7 is a circuit schematic diagram three of a charging circuit according to an exemplary embodiment.

Fig. 8 is a circuit schematic according to the charging circuit of fig. 7 in the first half cycle.

Fig. 9 is a circuit schematic according to the charging circuit shown in fig. 7 in the latter half cycle.

Fig. 10 is a schematic diagram showing a structure of a control device of a charging circuit according to an exemplary embodiment.

Fig. 11 is a block diagram of a terminal device 800 according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of apparatus and methods consistent with aspects of the invention as detailed in the accompanying claims.

In the related art, in order to increase the charging power, a charging circuit of a terminal device generally employs a method of increasing a charging current or a charging voltage.

Fig. 1 is a schematic circuit diagram of a charging circuit of the related art, as shown in fig. 1, which uses an active device capacitor (i.e., a flying capacitor CF) and switching devices (i.e., Q1-Q4), and implements efficient charging by adjusting the switching states of the switching devices Q1-Q4.

With the requirement of the terminal device for quick charging, the input voltage of the charging circuit is limited to the battery voltage, and here, the input voltage of the charging circuit can only be 2 times of the battery voltage.

In order to improve the charging power, only the current of the charging loop can be improved, but the charging reflux current is improved, the loss of the whole charging loop is obviously improved, the charging efficiency is reduced, and the use experience is reduced; and the current carrying capacity of the charging circuit is limited and cannot be infinitely improved.

Fig. 2 is a circuit schematic diagram two of a charging circuit in the related art, as shown in fig. 2, the charging circuit includes an input dc power Vin, a half-bridge circuit formed by switching devices (i.e. Q1 and Q2), a filter circuit formed by an energy storage inductor L and a capacitor C, and a load cell.

The input power supply of the charging circuit is larger than the output voltage, the input voltage adjusting range is larger, and the input current can be reduced by adjusting the input voltage of the charging circuit.

However, on one hand, as the charging voltage increases, the voltage difference between the front end and the rear end of the charging circuit increases, and the charging efficiency decreases; on the other hand, the charging circuit has a relatively small duty ratio, which also results in a decrease in charging efficiency.

Based on this, the embodiment of the present disclosure provides a charging circuit, fig. 3 is a schematic circuit diagram of a charging circuit shown in an exemplary embodiment, and as shown in fig. 3, the charging circuit 100 includes:

A first circuit 101 including a first capacitive component 1011 and a first switching component 1012 connected to the first capacitive component 1011;

a second line 102 including a second capacitance element 1021 and a second switching element 1022 connected to the second capacitance element 1021;

the input end of the first circuit 101 and the input end of the second circuit 102 are connected with a dc power supply 104, so that the dc power supply 104 supplies power to the first capacitor assembly and the second capacitor assembly;

the first switch component 1012 and the second switch component 1022 are switched according to a preset time period, and the switch states of the first switch component 1012 and the second switch component 1022 are different in the same time period;

the first capacitor assembly 1011 and the second capacitor assembly 1021 are both connected to the battery 103 to be charged, and when the first switch assembly 1012 is in the first state and the second switch assembly 1022 is in the second state, the first capacitor assembly 1011 discharges; the second capacitive component 1021 discharges when the first switch component 1012 is in the second state and the second switch component 1022 is in the first state.

The charging circuit may be a circuit applied to any terminal device with a battery, and the terminal device may be: smart phones, tablet computers, or wearable electronic devices, etc.

The battery within the electronic product may be: lithium batteries, sodium batteries, and the like, which can store electricity. The battery includes: the battery comprises a shell, a battery cell wrapped in the shell and positive and negative lugs arranged on the shell.

In this embodiment of the present disclosure, a battery in a terminal device is charged by a charging circuit, and specifically, output ends of the charging circuit (that is, an output end of a first line and an output end of a second line) may be respectively connected to both ends of a positive tab and a negative tab of the battery to be charged, and the battery is alternately charged by the first line and the second line.

It should be noted that, along with the increase of the charging power of the terminal device, the ripple wave output by the charging circuit is also increased, which is very unfavorable for charging safety; although the ripple can be reduced by selecting a higher specification filter element or increasing the switching frequency of the switching tube, selecting a higher specification filter element results in a volume and cost gain of the filter element, and the reliability of the charging circuit is not improved; increasing the switching frequency of the switching tube results in the switching loss of the switching tube being multiplied by the square gain, resulting in a decrease in the charging efficiency of the charging circuit.

Based on this, in the embodiment of the disclosure, by providing two parallel charging lines, namely, a first line and a second line, and controlling the states of a first switch component on the first line and a second switch component on the second line, the first capacitor component on the first line and the second capacitor component on the second line alternately discharge the battery, so as to charge the battery to be charged in the terminal device; therefore, under the condition that the switching frequency of the first switching component on the first circuit and the switching frequency of the second switching component on the second circuit are kept unchanged, the switching frequency of the whole charging circuit can be improved through the alternate charging of the first circuit and the second circuit, and on the basis that the switching loss of the whole charging circuit is unchanged, the ripple wave is reduced, and the charging safety is improved.

In an embodiment of the disclosure, the first circuit includes: a first capacitive component and a first switch component connected with the first capacitive component; the second circuit includes: a second capacitive component and a second switching component connected to the second capacitive component.

The input ends of the first circuit and the second circuit are connected with a direct current power supply, and when the connection between the first capacitance component on the first circuit and the direct current power supply is conducted or the connection between the second capacitance component on the second circuit and the direct current capacitance is conducted, the first capacitance component on the first circuit or the second capacitance component on the second circuit is charged through the direct current power supply.

The output ends of the first circuit and the second circuit are connected with the anode and the cathode of a battery to be charged in the terminal equipment, the connection between the first capacitor assembly on the first circuit and the direct current power supply is disconnected, and the connection between the first capacitor assembly and the battery is conducted, or the connection between the second capacitor assembly on the second circuit and the direct current power supply is disconnected, and when the connection between the second capacitor assembly and the battery is conducted, the battery is charged through discharging of the first capacitor assembly or the second capacitor assembly.

Here, the dc power supply may be used to output a dc current having a prescribed voltage (e.g., less than or equal to 5 volts).

It should be noted that, the terminal device including the charging circuit may form a power supply loop by connecting the input end of the charging circuit with a corresponding power adapter, and connecting the power adapter with an external power supply; the power adapter obtains alternating current from an external power supply through the power supply loop, and performs alternating current-direct current conversion processing on the alternating current so as to output direct current with specified voltage to the charging circuit.

It is understood that the first circuit and the second circuit may be two charging circuits with the same circuit structure, or may be two charging circuits with different circuit structures.

The first switch component is used for controlling the connection and disconnection conditions of the first capacitor component, the direct current power supply and the battery; the second switch component is used for controlling the connection and disconnection conditions of the second capacitor component, the direct current power supply and the battery.

Here, each of the first and second capacitive components may include: one or more capacitors. For example, if the first capacitive component includes a plurality of capacitors, the plurality of capacitors may be connected in parallel to increase the total capacitance value of the first capacitive component. The first and second switching assemblies may each include at least two switching devices.

It should be noted that, because the first switch component is used for controlling the on-off state of the first connection between the first capacitor component and the dc power supply, and the second connection between the first capacitor component and the battery; the on-off state of the first connection is opposite to the on-off state of the second connection; the first switching assembly comprises at least two switching devices, and the switching states of the switching devices are opposite, and similarly the second switching assembly also comprises at least two switching devices.

When the first switch component is in a first state and the second switch component is in a second state, the connection between the first capacitor component and the direct current power supply in the first circuit is disconnected, the connection between the first capacitor component and the battery is conducted, and the first capacitor component is in a discharging state and charges the battery; at this time, the connection between the second circuit component and the direct current power supply is conducted, the connection between the second circuit component and the battery is disconnected, and the second capacitor component is in a charging state and receives the charging of the direct current power supply.

When the first switch component is in a second state and the second switch component is in a first state, the connection between the first capacitor component and the direct current power supply in the first circuit is conducted, the connection between the first capacitor component and the battery is disconnected, and the first capacitor component is in a charging state and receives the charging of the direct current power supply; at this time, the connection between the second circuit component and the direct current power supply is disconnected, the connection between the second circuit component and the battery is conducted, and the second capacitor component is in a discharging state and charges the battery.

Here, the first switch component and the second switch component switch the switch states according to a preset time period, and the switch states of the first switch component and the second switch component are different in the same time period.

The first state and the second state are used to describe different switching states of the plurality of switching devices in the first switching assembly and the second switching assembly, respectively. The number of switching devices included in the first and second switching assemblies may be different, and the switching states of the respective switching devices corresponding to the first and second states may be different.

Therefore, the embodiment of the disclosure does not limit the specific switch states of the switch assembly corresponding to the first state and the second state, when the switch assembly is in the first state, the connection between the capacitor assembly connected with the switch assembly and the dc power supply is disconnected, and all the switch states of connection and conduction between the capacitor assembly and the battery, and when the switch assembly is in the second state, the connection between the capacitor assembly connected with the switch assembly and the dc power supply is conducted, and all the switch states of connection and disconnection between the capacitor assembly and the battery fall into the protection scope of the disclosure.

In the embodiment of the disclosure, the first switch component and the second switch component are switched between a first state and a second state at a preset switching frequency, and the states of the first switch component and the second switch component are different, so that the first capacitor component on the first circuit and the second capacitor component on the second circuit are alternately discharged, and a battery to be charged in the terminal device is charged.

For example, during a first half of the charging cycle, the first switch component is switched to a first state and the second switch component is switched to a second state, the charging being performed by the first capacitive component on the first line; in the latter half period of the charging period, the first switch component is switched to the second state, and the second switch component is switched to the first state, and the second capacitor component on the second line charges the charge.

In an embodiment of the present disclosure, the first switch assembly includes: a first controlled switch assembly and a second controlled switch assembly; wherein the first controlled switch assembly is operable to control an on-off state of a connection between the first capacitive assembly and the dc power source; the second controlled switch assembly may be used to control the on-off state of the connection between the second capacitive assembly and the battery.

The second switch assembly includes: a third controlled switch assembly and a fourth controlled switch assembly; wherein the third controlled switch assembly is operable to control an on-off state of a connection between the second capacitive assembly and the dc power source; the fourth controlled switch assembly may be used to control the on-off state of the connection between the second capacitive assembly and the battery.

Here, the controlled switching assembly is an electrical component having switching characteristics, and may be any type of switch that can be controlled to adjust the on-off state. For example, the controlled switch assembly may be: a Metal-Oxide-semiconductor field effect transistor (MOSFET), a bipolar junction transistor (Bipolar Junction Transistor, BJT), an Insulated Gate Bipolar Transistor (IGBT), or the like.

It should be noted that, because the MOS transistor has strong antistatic capability, in some embodiments, the controlled switch component may be a switch circuit formed by one or more MOS transistors.

When the first switch assembly is in a first state and the second switch assembly is in a second state, the first switch assembly and the fourth switch assembly are controlled to be disconnected, and the second switch assembly and the third switch assembly are controlled to be conducted, so that the connection between the first capacitor assembly and the direct-current power supply is disconnected, and the connection between the first capacitor assembly and the battery is conducted; at this time, the first capacitor assembly is in a discharging state to charge the battery. And the connection between the second capacitor assembly and the battery is disconnected and the connection between the second capacitor assembly and the direct-current power supply is conducted; at this time, the second capacitor assembly is in a charging state and receives the charging of the direct current power supply.

When the first switch assembly is in a second state and the second switch assembly is in a first state, the first controlled switch assembly and the fourth controlled switch assembly are controlled to be conducted, and the second controlled switch assembly and the third controlled switch assembly are disconnected, so that the connection between the first capacitor assembly and the direct-current power supply is conducted, and the connection between the first capacitor assembly and the battery is disconnected; at this time, the first capacitor assembly is in a charging state and receives the charging of the direct current power supply. The connection between the second capacitor assembly and the battery is conducted, and the connection between the second capacitor assembly and the direct-current power supply is disconnected; at this time, the second capacitor assembly is in a discharging state to charge the battery.

In an embodiment of the present disclosure, the first controlled switch assembly, the second controlled switch assembly, the third controlled switch assembly, and the fourth controlled switch assembly may each include: a plurality of switching devices.

The circuit architecture of the first circuit composed of the first controlled switch assembly, the second controlled switch assembly and the plurality of first capacitors is the same as the circuit architecture of the second circuit composed of the third controlled switch assembly, the fourth controlled switch assembly and the plurality of second capacitors.

When the first switch assembly is in a first state and the second switch assembly is in a second state, namely the first controlled switch assembly and the fourth controlled switch assembly are disconnected, and the second controlled switch assembly and the third controlled switch assembly are connected, a plurality of first capacitors in the first circuit are connected in parallel, and a plurality of second capacitors in the second circuit are connected in series.

Under the current situation, the first capacitors connected in parallel are disconnected from the direct current power supply, are connected with the battery, and are in a discharging state; the plurality of first capacitors and the battery form a plurality of charging loops, and the plurality of first capacitors respectively charge the battery by using the plurality of charging loops. At this time, the sum of the current values of the charging loops where the plurality of first capacitors connected in parallel are located is equal to the input current value of the battery.

The second circuits of the plurality of serially connected second capacitors are connected with the direct current power supply and disconnected with the battery, and the plurality of second capacitors are in a charging state; and the direct current power supply charges a plurality of second capacitors connected in series on the second circuit. At this time, the sum of the voltage values of the plurality of second capacitors connected in series is equal to the voltage value of the direct current power supply.

When the first switch assembly is in a second state and the second switch assembly is in a first state, namely the first controlled switch assembly and the fourth controlled switch assembly are conducted, and the second controlled switch assembly and the third controlled switch assembly are disconnected, a plurality of first capacitors in the first circuit are connected in series, and a plurality of second capacitors in the second circuit are connected in parallel.

Under the current situation, the first circuit where the plurality of first capacitors connected in series are located is connected with the direct current power supply, and is disconnected with the battery, and the plurality of first capacitors are in a charging state; the direct current power supply charges a plurality of first capacitors connected in series on the first line. At this time, the sum of the voltage values of the plurality of first capacitors connected in series is equal to the voltage value of the direct current power supply.

The plurality of second capacitors connected in parallel are disconnected from the direct current power supply, are connected with the battery, and are in a charging state; the second capacitors and the battery form a plurality of charging loops, and the second capacitors respectively charge the battery by using the charging loops. At this time, the sum of the current values of the charging loops where the plurality of second capacitors are connected in parallel is equal to the input current value of the battery.

When a plurality of capacitors are in a series state, the voltage value corresponding to each capacitor is related to the capacitance value of the capacitor.

Here, the present disclosure does not limit the connection relationship between the first controlled switching assembly, the plurality of switching devices in the second controlled switching assembly, and the plurality of first capacitances, and the connection relationship between the third controlled switching assembly, the plurality of switching devices in the fourth controlled switching assembly, and the plurality of second capacitances.

All the first controlled switch components and the fourth controlled switch components can be disconnected, the second controlled switch components and the third controlled switch components are conducted, a plurality of first capacitors are connected in parallel, and a plurality of second capacitors are connected in series; and when the first controlled switch assembly and the fourth controlled switch assembly are conducted, and the second controlled switch assembly and the third controlled switch assembly are disconnected, the first capacitors are connected in series, and the connection relation of the second capacitors in parallel is within the protection scope of the embodiment of the disclosure.

Illustratively, the charging circuit is described with the first capacitive assembly including 3 first capacitances and the second capacitive assembly including 3 second capacitances. As shown in fig. 4, fig. 4 is a circuit schematic diagram two of a charging circuit according to an exemplary embodiment. Wherein the first capacitive component comprises: first capacitor C _F11 、C _F12 And C _O1 The second capacitive component includes: second capacitor C _F21 、C _F22 And C _O2 The method comprises the steps of carrying out a first treatment on the surface of the The first controlled switch assembly includes: transistors Q11-Q13, the second controlled switching assembly comprising: transistors Q14-Q17, the third controlled switching assembly comprising: Q21-Q23, the fourth controlled switching assembly comprises Q24-Q27.

A first circuit: the first end of the transistor Q11 is connected with the DC power supply, and the second end is respectively connected with the first capacitor C _F11 Is connected to the first terminal of transistor Q16; first capacitor C _F11 Is connected to the second terminal of the transistor Q14 and the second terminal of the transistor Q12, respectively; a first end of the transistor Q14 and a first capacitor C _O1 Is connected to the second end of the first connector.

The second end of the transistor Q16 is respectively connected with the second end of the transistor Q17 and the first capacitor C _O1 Is the first of (2)One end is connected; the first end of the transistor Q17 is connected to the first end of the transistor Q12 and the first capacitor C _F12 Is connected to the first end of the housing; first capacitor C _F12 Is connected to the first terminal of the transistor Q15 and the second terminal of the transistor Q13, respectively; a second end of the transistor Q15 and a first capacitor C _O1 Is connected with the second end of the first connecting piece; a first end of the transistor Q13 and a first capacitor C _O1 A first capacitor C connected to the first end of _O1 Is grounded; first capacitor C _O1 The first end and the second end of the battery are respectively connected with the anode and the cathode of the battery.

And a second circuit: the first end of the transistor Q21 is connected with the DC power supply, and the second end is respectively connected with the second capacitor C _F21 Is connected to the first terminal of transistor Q26; second capacitor C _F21 Is connected to the first terminal of the transistor Q24 and the second terminal of the transistor Q22, respectively; a second end of the transistor Q24 and a second capacitor C _O2 Is connected to the second end of the first connector.

The second end of the transistor Q26 is connected to the second end of the transistor Q27 and the first capacitor C _O2 Is connected to the first end of the housing; the first end of the transistor Q27 is respectively connected to the first end of the transistor Q22 and the second capacitor C _F22 Is connected to the first end of the housing; second capacitor C _F22 Is connected to the first terminal of the transistor Q25 and the second terminal of the transistor Q23, respectively; first and second capacitors C of the transistor Q23 _O2 A second capacitor C connected to the first end of _O2 Is grounded; second capacitor C _O2 The first end and the second end of the battery are respectively connected with the anode and the cathode of the battery.

It should be noted that, the first end of the transistor of the charging circuit is a drain electrode, and the second end is a source electrode; the first end of the capacitor is a positive electrode, and the second end is a negative electrode.

A first capacitor C when the transistors Q11-Q13, Q24-Q27 are off and the transistors Q14-Q17, Q21-Q23 are on _F11 、C _F12 And C _O1 Parallel, form 3 charging loops: first charging circuit: c (C) _O1 And a battery; a second charging circuit: q17, C _F12 Q15 and battery; third charging circuit: q16, C _F11 Q14, charging through the 3 charging loopsThe cell is charged.

At this time, the second capacitor C _F21 、C _F22 And C _O2 Form a series circuit, namely a direct current power supply, Q21 and C _F21 、Q22、C _F22 、Q23、C _O2 And a ground terminal; DC power supply pair C _F21 、C _F22 And C _O2 Charging is performed.

When the transistors Q11-Q13 and Q24-Q27 are turned on and the transistors Q14-Q17 and Q21-Q23 are turned off, a first capacitor C _F11 、C _F12 And C _O1 Form a series circuit, namely a direct current power supply, Q11 and C _F11 、Q12、C _F12 、Q13、C _O1 And a ground terminal; DC power supply pair C _F11 、C _F12 And C _O1 Charging is performed.

At this time, the second capacitor C _F21 、C _F22 And C _O2 Parallel, form 3 charging loops: first charging circuit: c (C) _O2 And a battery; a second charging circuit: q27, C _F22 Q25 and battery; third charging circuit: q26, C _F21 And Q24, charging the battery through the 3 charging loops.

In an embodiment of the disclosure, capacitance values of a plurality of first capacitors in the first capacitor assembly are the same; the capacitance values of the plurality of second capacitors in the second capacitor assembly are the same.

If the first capacitor assembly includes N first capacitors, the second capacitor assembly includes N second capacitors. When the first controlled switch assembly and the fourth controlled switch assembly are conducted and the second controlled switch assembly and the third controlled switch assembly are disconnected, a plurality of first capacitors in the first circuit are connected in series, and a plurality of second capacitors in the second circuit are connected in parallel.

The direct current power supply charges a plurality of first capacitors, and under the condition that the capacitance values of the plurality of first capacitors are the same, the voltage values of the first capacitors are the same, and the ratio of the voltage value of the direct current power supply to the voltage value of a single first capacitor, namely the ratio of the input voltage and the output voltage of the charging circuit is N.

Since the plurality of second capacitors connected in parallel are in a discharge state, the current value in the charging loop formed by each second capacitor is the same when the capacitance values of the plurality of second capacitors are the same, and the input current of the battery is N times the current value in the charging loop formed by each second capacitor.

Similarly, when the first controlled switch assembly and the fourth controlled switch assembly are disconnected and the second controlled switch assembly and the third controlled switch assembly are conducted, a plurality of first capacitors in the first circuit are connected in series, and a plurality of second capacitors in the second circuit are connected in parallel; the ratio of the voltage value of the direct current power supply to the voltage value of the single second capacitor, namely the ratio of the input voltage and the output voltage of the charging circuit is N; the input current of the battery is N times of the current value in the charging loop formed by each first capacitor.

Therefore, the embodiment of the disclosure can adjust the ratio of the input voltage to the output voltage of the charging circuit by adjusting the number of the first capacitors and/or the second capacitors in the charging circuit, so that the effect of improving the charging power is achieved by improving the charging voltage under the condition that the charging current is kept unchanged, the current at the front end of the charging front circuit is effectively reduced, the stress of devices at the front end of the charging circuit is reduced, and the safety of the charging circuit is improved.

Optionally, the circuit further comprises:

In an embodiment of the disclosure, the switch control circuit is configured to generate a first control signal for controlling the first controlled switch assembly, the fourth controlled switch assembly, and a second control signal for controlling the second controlled switch assembly, the third controlled switch assembly, wherein the second control signal is an inverse of the first control signal.

If the first control signal is at a first level, the second control signal is at a second level, the first controlled switch assembly and the fourth controlled switch assembly are in an off state, and the second controlled switch assembly and the third controlled switch assembly are in an on state; the first capacitors in the first circuit are in a parallel discharging state and charge the battery, and the second capacitors in the second circuit are in a series charging state and receive the charging of the direct current power supply.

If the first control signal is at a second level, the second control signal is at a first level, the first controlled switch assembly and the fourth controlled switch assembly are in a conducting state, and the second controlled switch assembly and the third controlled switch assembly are in a disconnecting state; a plurality of first capacitors in the first circuit are in a series charging state and are charged by a direct current power supply; the second capacitors in the second line are in a parallel discharge state to charge the battery.

The first level may be understood herein as a low level, while the second level is a high level relative to the first level.

Optionally, the switch control circuit includes:

In an embodiment of the disclosure, the first control signal may be a clock signal, and the second control signal is a clock signal opposite to the first control signal.

The switch state control circuit further includes: an inverter;

the output end of the clock signal generating circuit is respectively connected with the control ends of the first controlled switch assembly and the fourth controlled switch assembly and the input end of the inverter, and the output end of the inverter is connected with the control ends of the second controlled switch assembly and the third controlled switch assembly;

the inverter is used for carrying out reverse processing on the first control signal output by the clock signal generating circuit to obtain a second control signal, and inputting the second control signal to the control ends of the second controlled switch assembly and the third controlled switch assembly.

As shown in fig. 5, fig. 5 is a timing diagram of a first control signal and a second control signal according to an exemplary embodiment. Under the control of a first control signal and a second control signal, the switching states of the first controlled switching component and the fourth controlled switching component are the same; the switch states of the second controlled switch assembly and the third controlled switch assembly are the same; the first controlled switch assembly and the second controlled switch assembly are opposite in switch state.

According to the embodiment of the disclosure, a first control signal changing in the time domain is generated through a clock signal generating circuit, the first control signal is subjected to reverse processing to obtain a second control signal, the first control signal and the second control signal control the switch states of a plurality of controlled switch assemblies in a charging circuit, and a plurality of first capacitors and a plurality of second capacitors are used for alternately charging a battery; therefore, the control of the opposite switch states of the controlled switch assemblies is realized by only one switch control circuit, so that synchronous switching of the opposite switch states of the controlled switch assemblies is ensured, and the structure of the charging circuit is further simplified.

The unidirectional conductive element is an electronic element having unidirectional conductive characteristics, such as a diode.

In an embodiment of the present disclosure, the first unidirectional conducting element is used to control a flow direction of the current in the first line; the second unidirectional conducting element is used for controlling the flow direction of current in the second circuit.

When the first switch component is in a first state and the second switch component is in a second state, the first capacitor component is in a discharging state, the second capacitor component is in a charging state, and a first unidirectional conduction element is used for allowing a charging current output by the first capacitor component to flow to the battery in a unidirectional way so as to charge the battery; and the second unidirectional conduction element is used for prohibiting the current output by the battery or the first capacitance component from reversely flowing to the second capacitance component.

When the first switch component is in a second state and the first switch component is in a first state, the first capacitor component is in a charging state, the second capacitor component is in a discharging state, and a second unidirectional conduction element is utilized to allow a charging current output by the second capacitor component to flow to the battery unidirectionally so as to charge the battery; and the first unidirectional conduction element is used for prohibiting the current output by the battery or the second capacitance component from reversely flowing to the first capacitance component.

Fig. 6 is a flowchart illustrating a control method of a charging circuit according to an exemplary embodiment, as shown in fig. 6, the control method includes:

step S101, alternately controlling a first switch component and a second switch component to switch between a first state and a second state according to a preset time period, wherein the states of the first switch component and the second switch component are different in the same time period;

step S102, when the first switch component is in the first state and the second switch component is in the second state, a first capacitor component in a first circuit charges a battery to be charged;

step S103, when the first switch component is in the second state and the second switch component is in the first state, the second capacitor component in the second line charges the battery to be charged.

In an embodiment of the disclosure, the control method of the charging circuit is applied to the charging circuit shown in the one or more technical solutions, and the first capacitive component in the first line and the second capacitive component in the second line in the charging circuit are controlled to switch between the first state and the second state by controlling the first switch component and the second switch component in the charging circuit, so that the battery is alternately charged by the first capacitive component and the second capacitive component in the second line.

In the first half period of the charging period, when the first switch component is in a first state and the second switch component is in a second state, the connection between the first capacitor component in the first circuit and the battery is conducted, the connection between the first capacitor component and the direct current power supply is disconnected, the first capacitor component is in a discharging state, and the battery is charged by utilizing the electric energy stored by the first capacitor component; and the second capacitor assembly in the second circuit is connected with the direct current power supply, is disconnected with the battery, is in a charging state and is charged by the direct current power supply.

In the second half period of the charging period, the first capacitor component in the first circuit is connected with the direct current power supply and disconnected from the battery by controlling the first switch component to be in the second state and the first switch component to be in the first state, and the first capacitor is in the charging state and is charged by the direct current power supply; and the second capacitor assembly in the second circuit is connected with the battery and disconnected from the direct current power supply, and is in a discharging state, and the battery is charged by utilizing the electric energy stored by the second capacitor assembly.

It should be noted that, along with the increase of the charging power of the charging circuit, the output ripple of the charging circuit is also larger and larger, which is very unfavorable for the charging safety of the charging circuit; considering that the output ripple is inversely proportional to the capacitance value of the capacitor in the charging circuit and the switching frequency of the switching device, the output ripple may be reduced by increasing the capacitance value of the capacitor or increasing the switching frequency. But is limited by the volume and cost of the charging circuit, and it is difficult to achieve a better ripple reduction effect by increasing the capacitance value of the capacitor; while increasing the switching frequency results in a significant increase in switching losses.

According to the embodiment of the disclosure, the battery is alternately charged through the first capacitor assembly and the second capacitor assembly, so that under the condition that the switching frequency of the switch assemblies in the first circuit and the second circuit is unchanged, the switching frequency of the whole charging circuit is improved, the output ripple of the charging circuit is reduced, and the charging efficiency and the charging safety are improved.

Optionally, in the step S102, the first switch component is in the first state and the second switch component is in the second state, and charging the battery to be charged by the first capacitor component in the first line includes:

in the step S103, when the first switch component is in the second state and the second switch component is in the first state, charging the battery to be charged by the second capacitor component in the second line includes:

In the embodiment of the disclosure, the first controlled switch component and the fourth controlled switch component of the charging circuit can be controlled to be turned on by the switch control circuit, and the second controlled switch component and the third controlled switch component are turned off, at this time, a plurality of first capacitors in the first circuit are in a parallel state, the connection between the plurality of first capacitors and the direct current power supply is disconnected, the plurality of first capacitors are in a discharging state, and the plurality of first capacitors and the battery form a plurality of charging loops to charge the battery; here, the input current value of the battery is equal to the sum of the charging current values of the plurality of charging circuits.

Meanwhile, a plurality of second capacitors in a second circuit are in a serial state, the second capacitors are connected with the direct current power supply and disconnected with the battery, the first capacitors are in a charging state, an energy storage loop is formed by the second capacitors and the direct current power supply, and the second capacitors are charged by the direct current power supply; here, the voltage value of the direct current power supply is equal to the sum of the voltage values of the plurality of second capacitors.

The first controlled switch assembly and the fourth controlled switch assembly of the charging circuit can be controlled to be disconnected through the switch control circuit, the second controlled switch assembly and the third controlled switch assembly are conducted, and at the moment, a plurality of first capacitors in the first circuit are connected in series and are in a charging state; the plurality of first capacitors are charged by the direct current power supply. Here, the voltage value of the direct current power supply is equal to the sum of the voltage values of the plurality of first capacitors.

Simultaneously, a plurality of second capacitors in the second circuit are connected in parallel and are in a discharging state; the second capacitors and the battery form a plurality of charging loops for charging the battery. Here, the input current value of the battery is equal to the sum of the charging current values of the plurality of charging circuits.

According to the embodiment of the disclosure, the circuit architecture in the first circuit and the second circuit can be adjusted by controlling the switching state of each controlled switch component in the charging circuit, so that the voltage division effect is realized when the first capacitors or the second capacitors are charged in series, the first capacitors or the second capacitors are discharged in parallel, the current of the first circuit or the second circuit is reduced under the condition that the input current of the battery is kept unchanged, the circuit loss of the first circuit or the second circuit is reduced, the charging efficiency is improved, the stress of electronic devices on the first circuit or the second circuit can be effectively reduced, and the safety of the circuit is improved.

The following provides a specific example in combination with any one of the above technical solutions, and the present disclosure provides a charging circuit, including:

the first circuit comprises a first capacitor assembly, a first switch assembly and a third switch assembly, wherein the first switch assembly and the third switch assembly are connected with the first capacitor assembly;

the second circuit comprises a second capacitor assembly, a second switch assembly and a fourth switch assembly, wherein the second switch assembly and the fourth switch assembly are connected with the second capacitor assembly;

the first end of the first capacitor component is connected with the positive electrode of the battery to be charged through a first unidirectional conducting element, and the second end of the first capacitor component is connected with the negative electrode of the battery; the first end of the second capacitor assembly is connected with the positive electrode of the battery through a second unidirectional conduction element, and the second end of the second capacitor assembly is connected with the negative electrode of the battery;

The input end of the first circuit and the input end of the second circuit are connected with a direct current power supply so that the direct current power supply supplies power for the first capacitor assembly and the second capacitor assembly;

the first switch assembly, the second switch assembly, the third switch assembly and the fourth switch assembly are all switched according to a preset time period, and the switch states of the first switch assembly, the fourth switch assembly, the second switch assembly and the third switch assembly are different in the same time period;

the first switch assembly and the fourth switch assembly are in a first state, the second switch assembly and the third switch assembly are in a second state, a plurality of capacitance elements in the first capacitance assembly are in a parallel discharging state, and a plurality of capacitance elements in the second capacitance assembly are in a series charging state;

the first switch assembly and the fourth switch assembly are in a second state, the second switch assembly and the third switch assembly are in a first state, a plurality of capacitance elements in the first capacitance assembly are in a series charging state, and a plurality of capacitance elements in the second capacitance assembly are in a parallel discharging state.

In this example, the states of the first and second switch assemblies are different, the states of the first and fourth switch assemblies are the same, the states of the second and third switch assemblies are the same, and the switching frequencies are the same.

Illustratively, as shown in fig. 7, fig. 7 is a circuit schematic diagram three of a charging circuit according to an exemplary embodiment. Wherein the first switch assembly comprises: first transistor elements Q11-Q13 and second transistor elements Q14-Q17; the second switch assembly includes: third transistor elements Q21-Q23 and fourth transistor elements Q24-Q27; the first capacitive component includes: three first capacitors C _F11 、C _F12 And C _O1 The method comprises the steps of carrying out a first treatment on the surface of the The second capacitive component includes: three second capacitors C _F21 、C _F22 And C _O2 。

As shown in fig. 8, fig. 8 is a circuit schematic according to the charging circuit shown in fig. 7 in the first half cycle. During the first half period of the charging period, the first transistor elements Q11 to Q13 and the fourth transistor elements Q24 to Q27 are controlled to be turned on by the switch control circuit, and the second transistor elements Q14 to Q17 and the third transistor elements Q21 to Q23 are controlled to be turned off; at this time, in the charging circuit, a first capacitor C _F11 、C _F12 And C _O1 Series connection of a second circuit C _F21 、C _F22 And C _O2 And are connected in parallel.

The energy storage circuit path is: DC power supply V _in Transistor Q11, first capacitor C _F11 Transistor Q12, first capacitor C _F12 Transistor Q13 and first capacitor C _O1 The method comprises the steps of carrying out a first treatment on the surface of the Namely, a first capacitance C _F11 、C _F12 And C _O1 And the serial connection is used for receiving the charge of the direct current power supply.

In the case that the capacitance values of the three first capacitors are the same, the partial voltage of each first capacitor is 1/3V _in The method comprises the steps of carrying out a first treatment on the surface of the Filling materialThe ratio of the input voltage to the output voltage of the circuit is 3:1.

Charging circuit path: a first path: second capacitor C _O2 To the battery; second path: transistor Q25, second capacitor C _F22 Transistor Q27 to battery; third path: transistor Q24, second capacitor C _F21 Transistor Q26 to battery. That is, the second capacitor is discharged in parallel to form a plurality of charging loops, and the battery is charged.

In the case that the capacitance values of the three second capacitors are the same, the charging circuit of the charging circuit is 3 times the current of each charging circuit.

As shown in fig. 9, fig. 9 is a circuit schematic according to fig. 7 when the charging circuit is in the latter half cycle. During the latter half of the charging period, the first transistor elements Q11-Q13 and the fourth transistor elements Q24-Q27 are controlled to be turned off by the switch control circuit, and the second transistor elements Q14-Q17 and the third transistor elements Q21-Q23 are controlled to be turned on; at this time, in the charging circuit, a first capacitor C _F11 、C _F12 And C _O1 Parallel, second circuit C _F21 、C _F22 And C _O2 And (3) connecting in series.

Therefore, the battery is alternately charged through the first capacitors and the second capacitors in the first half period and the second half period of the charging period, and the switching frequency of the whole charging circuit is improved on the basis of keeping the switching frequency of each switching device in the charging circuit unchanged, so that charging ripple waves are effectively reduced, and the safety of the battery is improved.

Fig. 10 is a schematic diagram showing a structure of a control device of a charging circuit according to an exemplary embodiment. In the charging circuit shown in one or more of the above embodiments, referring to fig. 10, the apparatus 200 includes:

the control module 201 is configured to alternately control the first switch component and the second switch component to switch between a first state and a second state according to a preset time period, where the states of the first switch component and the second switch component are different in the same time period;

a charging module 202, configured to charge a battery to be charged by a first capacitor assembly in a first line when the first switch assembly is in the first state and the second switch assembly is in the second state; and when the first switch component is in the second state and the second switch component is in the first state, the second capacitor component in the second circuit charges the battery to be charged.

Optionally, the charging module 202 is further configured to:

The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.

The present disclosure also provides a terminal device, including:

the charging circuit according to one or more of the above-described aspects;

In the embodiment of the disclosure, the first switch component on the first line and the second switch component on the second line in the charging circuit are controlled to alternately work in different states, so that the first capacitor component on the first line and the second capacitor component on the second line alternately charge the battery, and therefore the switching frequency of the first switch component and the switching frequency of the second switch component are kept unchanged (namely, the switching frequency of each switch device on the first line and the second line is unchanged), the switching frequency of the whole charging circuit is improved, ripple waves are effectively reduced, and the charging efficiency and the charging safety of the charging circuit are improved.

The present disclosure also provides a control device of a charging circuit, the device comprising:

a processor;

a memory for storing executable instructions;

the processor is configured to implement steps in a method of controlling a charging circuit according to one or more aspects when executing executable instructions stored in the memory.

Fig. 11 is a block diagram of a terminal device 800 according to an exemplary embodiment. For example, the terminal device 800 may be a mobile phone, a mobile computer, or the like.

Referring to fig. 11, a terminal device 800 may include one or more of the following components: a processing component 802, a memory 804, a power component 806, a multimedia component 808, an audio component 810, an input/output (I/O) interface 812, a sensor component 814, and a communication component 816.

The processing component 802 generally controls overall operation of the terminal device 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to perform all or part of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interactions between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.

The memory 804 is configured to store various types of data to support operations at the device 800. Examples of such data include instructions for any application or method operating on terminal device 800, contact data, phonebook data, messages, pictures, video, and the like. The memory 804 may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk.

The power supply component 806 provides power to the various components of the terminal device 800. The power components 806 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the terminal device 800.

The multimedia component 808 includes a screen between the terminal device 800 and the user that provides an output interface. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or slide action, but also the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front camera and/or a rear camera. The front camera and/or the rear camera may receive external multimedia data when the device 800 is in an operational mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the terminal device 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may be further stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 further includes a speaker for outputting audio signals.

The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be a keyboard, click wheel, buttons, etc. These buttons may include, but are not limited to: homepage button, volume button, start button, and lock button.

The sensor assembly 814 includes one or more sensors for providing status assessment of various aspects of the terminal device 800. For example, the sensor assembly 814 may detect an on/off state of the device 800, a relative positioning of the components, such as a display and keypad of the terminal device 800, the sensor assembly 814 may also detect a change in position of the terminal device 800 or a component of the terminal device 800, the presence or absence of a user's contact with the terminal device 800, an orientation or acceleration/deceleration of the terminal device 800, and a change in temperature of the terminal device 800. The sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 816 is configured to facilitate communication between the terminal device 800 and other devices, either wired or wireless. The terminal device 800 may access a wireless network based on a communication standard, such as Wi-Fi,2G, or 3G, or a combination thereof. In one exemplary embodiment, the communication component 816 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the terminal device 800 can be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic elements for executing the methods described above.

In an exemplary embodiment, a non-transitory computer readable storage medium is also provided, such as memory 804 including instructions executable by processor 820 of terminal device 800 to perform the above-described method. For example, the non-transitory computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It is to be understood that the invention is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims

1. A charging circuit, comprising:

2. The circuit of claim 1, wherein the first switch assembly comprises: a first controlled switch assembly and a second controlled switch assembly;

3. The circuit of claim 1, wherein the first capacitive component comprises: a plurality of first capacitors; the second capacitive component includes: a plurality of second capacitors;

4. A circuit according to claim 3, wherein the ratio of the input voltage and the output voltage of the charging circuit is positively correlated with the number of the first capacitors and/or the second capacitors.

5. The circuit of claim 2, wherein the circuit further comprises:

6. The circuit of claim 5, wherein the switch control circuit comprises:

7. The circuit of claim 1, wherein the first line further comprises: the first unidirectional conduction element is connected between the first capacitance component and the positive electrode of the battery to be charged and is used for allowing the charging current output by the first capacitance component to flow to the battery in a unidirectional way;

8. A terminal device, comprising:

a charging circuit as claimed in any one of claims 1 to 7;

9. A control method of a charging circuit, characterized by being applied to the charging circuit according to any one of claims 1 to 7, comprising:

10. The method of claim 9, wherein charging the battery to be charged by the first capacitive component within the first line while the first switch component is in the first state and the second switch component is in the second state comprises:

11. A control device of a charging circuit, characterized by being applied to the charging circuit according to any one of claims 1 to 7, comprising:

the control module is used for alternately controlling the first switch assembly and the second switch assembly to switch between a first state and a second state according to a preset time period, and the states of the first switch assembly and the second switch assembly are different in the same time period;

12. A control device of a charging circuit, comprising:

a processor;

a memory for storing executable instructions;

the processor is configured to implement the steps in the control method of the charging circuit of claim 9 or 10 when executing executable instructions stored in the memory.

13. A non-transitory computer readable storage medium, which when executed by a processor of an electronic device, causes the electronic device to perform the steps in the method of controlling a charging circuit as claimed in claim 9 or 10.