Charging circuit and terminal device, control method of charging circuit

Abstract

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

Description

Technical Field

[0001] This disclosure relates to the field of charging technology, and in particular to a charging circuit and terminal equipment, and a control method for the charging circuit. Background Technology

[0002] Currently, with the improvement of charging technology for terminal devices, the charging power of these devices is increasing, and the current carrying capacity of the charging circuit is also increasing. This leads to a significant increase in line losses and a decrease in charging efficiency during the charging process. Limited by the current carrying capacity of the charging circuit, the improvement of charging power has reached a bottleneck; furthermore, with the increase in charging power, the output ripple also increases, which is detrimental to charging safety. Summary of the Invention

[0003] This disclosure provides a charging circuit and terminal equipment, a control method for the charging circuit, an apparatus, and a storage medium.

[0004] According to a first aspect of the present disclosure, a charging circuit is provided, comprising:

[0005] The first circuit includes a first capacitor assembly and a first switch assembly connected to the first capacitor assembly;

[0006] The second circuit includes a second capacitor assembly and a second switch assembly connected to the second capacitor assembly;

[0007] The input terminals of the first line and the second line are both connected to a DC power supply so that the DC power supply can power the first capacitor assembly and the second capacitor assembly.

[0008] Both the first switch component and the second switch component switch their switching states according to a preset time period, and the first switch component and the second switch component are in different switching states within the same time period;

[0009] Both the first capacitor assembly and the second capacitor assembly are connected to the battery to be charged. When the first switch assembly is in the first state and the second switch assembly is in the second state, the first capacitor assembly discharges; when the first switch assembly is in the second state and the second switch assembly is in the first state, the second capacitor assembly discharges.

[0010] Optionally, the first switching assembly includes: a first controlled switching assembly and a second controlled switching assembly;

[0011] The second switching assembly includes: a third controlled switching assembly and a fourth controlled switching assembly;

[0012] 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 turned on.

[0013] 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 turned on, and the second controlled switch component and the third controlled switch component are turned off.

[0014] Optionally, the first capacitor assembly includes a plurality of first capacitors; the second capacitor assembly includes a plurality of second capacitors.

[0015] The first switch assembly is in the first state and the second switch assembly is in the second state. The plurality of first capacitors in the first line are connected in parallel to form a plurality of charging circuits to charge the battery. The plurality of second capacitors in the second line are connected in series to receive charging from the DC power supply.

[0016] When the first switching component is in the second state and the second switching component is in the first state, the plurality of first capacitors in the first line are connected in series to receive charging from the DC power supply; and the plurality of second capacitors in the second line are connected in parallel to form a plurality of charging circuits to charge the battery.

[0017] Optionally, the ratio of the input voltage to the output voltage of the charging circuit is positively correlated with the number of the first capacitor and / or the second capacitor.

[0018] Optionally, the circuit further includes:

[0019] A switch control circuit is connected to the first controlled switch assembly, the second controlled switch assembly, the third controlled switch assembly, and the fourth controlled switch assembly;

[0020] The switch control circuit is used to output a first control signal to the first controlled switch assembly and the fourth controlled switch assembly, and to output a second control signal to the second controlled switch assembly and the third controlled switch assembly; wherein the second control signal is a reverse signal formed by reversing the first control signal.

[0021] Optionally, the switch control circuit includes:

[0022] A clock signal generation circuit is used to generate the first control signal that varies in the time domain, and to generate the second control signal by inverting the first control signal.

[0023] Optionally, the first line further includes: a first unidirectional conducting element connected between the first capacitor assembly and the positive terminal of the battery to be charged, for allowing the charging current output by the first capacitor assembly to flow unidirectionally to the battery;

[0024] The second circuit further includes a second unidirectional conducting element connected between the second capacitor assembly and the positive terminal of the battery to be charged, for allowing the charging current output by the second capacitor assembly to flow unidirectionally to the battery.

[0025] According to a second aspect of the present disclosure, a terminal device is provided, comprising:

[0026] The charging circuit as described in the first aspect of the embodiments of this disclosure;

[0027] A battery, connected to the charging circuit, is used to receive charging from the charging circuit.

[0028] According to a third aspect of the present disclosure, a control method for a charging circuit is provided, applied to the charging circuit described in the first aspect of the present disclosure, comprising:

[0029] According to a preset time period, the first switch component and the second switch component are alternately controlled to switch between the first state and the second state, and the states of the first switch component and the second switch component are different within the same time period;

[0030] When the first switch assembly is in the first state and the second switch assembly is in the second state, the first capacitor assembly in the first line charges the battery to be charged.

[0031] When the first switch assembly is in the second state and the second switch assembly is in the first state, the second capacitor assembly in the second circuit charges the battery to be charged.

[0032] Optionally, the step of charging the battery to be charged by the first capacitor assembly in the first circuit when the first switch assembly is in the first state and the second switch assembly is in the second state includes:

[0033] 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, multiple charging circuits formed by multiple parallel first capacitors in the first line charge the battery; and multiple series second capacitors in the second line receive charging from the DC power supply.

[0034] The step of charging the battery to be charged by the second capacitor assembly in the second circuit when the first switch assembly is in the second state and the second switch assembly is in the first state includes:

[0035] When the first and fourth controlled switch components are off, and the second and third controlled switch components are on, multiple charging circuits formed by multiple parallel second capacitors in the second line charge the battery; and multiple series-connected first capacitors in the first line receive charging from the DC power supply.

[0036] According to a fourth aspect of the present disclosure, a control device for a charging circuit is provided, applied in the charging circuit described in the first aspect of the present disclosure, the method comprising:

[0037] The control module is used 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, and the states of the first switch component and the second switch component are different within the same time period, and the switching frequency is the same.

[0038] A charging module is configured to charge a battery to be charged by a first capacitor component in a first circuit when the first switch component is in the first state and the second switch component is in the second state; and to charge a battery to be charged by a second capacitor component in a second circuit when the first switch component is in the second state and the second switch component is in the first state.

[0039] According to a fifth aspect of the present disclosure, a control device for a charging circuit is provided, comprising:

[0040] processor;

[0041] Memory used to store executable instructions;

[0042] The processor is configured to, when executing the executable instructions, implement the steps in the method as described in the third aspect of the embodiments of this disclosure.

[0043] According to a sixth aspect of the present disclosure, a non-transitory computer-readable storage medium is provided, wherein when instructions in the storage medium are executed by a processor of an electronic device, the electronic device is enabled to perform steps in the method as described in the third aspect of the present disclosure.

[0044] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0045] In the embodiments of this disclosure, by setting a first line and a second line in parallel in the charging circuit, and controlling the first switching component on the first line and the second switching component on the second line to work alternately in different states according to a preset time period, the first capacitor component on the first line and the second capacitor component on the second line alternately charge the battery. While keeping the switching frequency of the first switching component and the second switching component unchanged (i.e., the switching frequency of each switching device on the first line and the second line unchanged), the switching frequency of the entire charging circuit is increased, effectively reducing ripple and improving the charging efficiency and charging safety of the charging circuit.

[0046] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0047] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0048] Figure 1 This is a circuit diagram of a charging circuit based on related technology. Figure 1 .

[0049] Figure 2 This is a circuit diagram of a charging circuit in related technologies. Figure 2 .

[0050] Figure 3 This is a circuit diagram of a charging circuit according to an exemplary embodiment. Figure 1 .

[0051] Figure 4 This is a circuit diagram of a charging circuit according to an exemplary embodiment. Figure 2 .

[0052] Figure 5 This is a timing diagram of a first control signal and a second control signal according to an exemplary embodiment.

[0053] Figure 6 This is a flowchart illustrating a control method for a charging circuit according to an exemplary embodiment.

[0054] Figure 7 This is a circuit diagram of a charging circuit according to an exemplary embodiment. Figure 3 .

[0055] Figure 8 It is based on Figure 7 The circuit diagram shown is a schematic diagram of the charging circuit in the first half of the cycle.

[0056] Figure 9 It is based on Figure 7 The circuit diagram shown is a schematic diagram of the charging circuit in the second half of the cycle.

[0057] Figure 10 This is a schematic diagram of the structure of a control device for a charging circuit according to an exemplary embodiment.

[0058] Figure 11 This is a block diagram illustrating a terminal device 800 according to an exemplary embodiment. Detailed Implementation

[0059] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0060] In related technologies, in order to improve charging power, the charging circuit of terminal equipment generally adopts the method of increasing charging current or increasing charging voltage.

[0061] Figure 1 This is a circuit diagram of a charging circuit based on related technology. Figure 1 ,like Figure 1 As shown, the circuit uses active components such as capacitors (i.e., flying capacitors CF) and switching devices (i.e., Q1-Q4). Efficient charging is achieved by adjusting the switching states of the switching devices Q1-Q4.

[0062] As terminal devices demand fast charging, the input voltage of the aforementioned charging circuit will be limited by the battery voltage. Here, the input voltage of the charging circuit can only be twice the battery voltage.

[0063] To increase charging power, the current in the charging circuit can only be increased. However, increasing the charging return current significantly increases the losses in the entire charging circuit, reducing charging efficiency and the user experience. Furthermore, the current carrying capacity of the charging circuit is limited and cannot be increased indefinitely.

[0064] Figure 2 This is a circuit diagram of a charging circuit in related technologies. Figure 2 ,like Figure 2 As shown, the charging circuit includes an input DC power supply Vin, a half-bridge circuit composed of switching devices (i.e., Q1 and Q2), a filter circuit composed of an energy storage inductor L and a capacitor C, and a load battery cell.

[0065] The input power of the above charging circuit is greater than the output voltage, and the input voltage adjustment range is large. The input current can be reduced by increasing the input voltage of the charging circuit.

[0066] However, on the one hand, as the charging voltage increases, the voltage difference between the front and back ends of the charging circuit will increase, and the charging efficiency will decrease; on the other hand, the duty cycle of the aforementioned charging circuit is small, which will also lead to a decrease in charging efficiency.

[0067] Based on this, embodiments of this disclosure provide a charging circuit. Figure 3 This is a circuit diagram of a charging circuit according to an exemplary embodiment. Figure 1 ,like Figure 3 As shown, the charging circuit 100 includes:

[0068] The first line 101 includes a first capacitor assembly 1011 and a first switch assembly 1012 connected to the first capacitor assembly 1011.

[0069] The second line 102 includes a second capacitor assembly 1021 and a second switch assembly 1022 connected to the second capacitor assembly 1021.

[0070] The input terminals of the first line 101 and the second line 102 are both connected to the DC power supply 104 so that the DC power supply 104 can supply power to the first capacitor assembly and the second capacitor assembly.

[0071] The first switch component 1012 and the second switch component 1022 switch their states according to a preset time period, and the first switch component 1012 and the second switch component 1022 are in different states within the same time period;

[0072] Both the first capacitor assembly 1011 and the second capacitor assembly 1021 are connected to the battery 103 to be charged. 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; when the first switch assembly 1012 is in the second state and the second switch assembly 1022 is in the first state, the second capacitor assembly 1021 discharges.

[0073] It should be noted that the charging circuit can be applied to any battery-powered terminal device, such as a smartphone, tablet computer, or wearable electronic device.

[0074] The battery inside an electronic product can be a lithium battery or a sodium battery, or other batteries that can store electrical energy. The battery includes a casing, a battery cell encased within the casing, and positive and negative terminals on the casing.

[0075] In this embodiment of the disclosure, the battery in the terminal device is charged by a charging circuit. Specifically, the output terminal of the charging circuit (i.e., the output terminal of the first line and the output terminal of the second line) can be connected to the positive and negative terminals of the battery to be charged, respectively, and the battery is charged alternately by the first line and the second line.

[0076] It should be noted that as the charging power of terminal devices increases, the ripple output of the charging circuit also increases, which is very detrimental to charging safety. Although the ripple can be reduced by using higher-specification filter components or increasing the switching frequency of the switching transistor, using higher-specification filter components will lead to an increase in the size and cost of the filter components, and the reliability of the charging circuit will not be improved. Increasing the switching frequency of the switching transistor will cause the switching loss of the switching transistor to increase by a square multiple, resulting in a decrease in the charging efficiency of the charging circuit.

[0077] Based on this, the embodiments of this disclosure provide two parallel charging lines, namely a first line and a second line. By controlling the state of the first switching component on the first line and the second switching 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 and charge the battery to be charged in the terminal device. Thus, while keeping the switching frequency of the first switching component on the first line and the second switching component on the second line constant, the switching frequency of the entire charging line is increased by alternating charging through the first line and the second line. On the basis of keeping the switching loss of the entire charging line constant, ripple is reduced and charging safety is improved.

[0078] In this embodiment of the disclosure, the first line includes: a first capacitor assembly and a first switch assembly connected to the first capacitor assembly; the second line includes: a second capacitor assembly and a second switch assembly connected to the second capacitor assembly.

[0079] Here, the input terminals of the first line and the second line are connected to a DC power supply. When the connection between the first capacitor component on the first line and the DC power supply is made active, or when the connection between the second capacitor component on the second line and the DC capacitor is made active, the first capacitor component on the first line or the second capacitor component on the second line is charged by the DC power supply.

[0080] The output terminals of the first and second lines are connected to the positive and negative terminals of the battery to be charged in the terminal device. When the connection between the first capacitor component on the first line and the DC power supply is disconnected and the connection between the first capacitor component and the battery is made conductive, or when the connection between the second capacitor component on the second line and the DC power supply is disconnected and the connection between the second capacitor component and the battery is made conductive, the battery is charged by discharging the first capacitor component or the second capacitor component.

[0081] Here, the DC power supply can be used to output a DC current with a specified voltage (e.g., less than or equal to 5 volts).

[0082] It should be noted that a terminal device containing the charging circuit can form a power supply circuit by connecting the input terminal of the charging circuit to a corresponding power adapter, and the power adapter to an external power source. The power adapter obtains AC current from the external power source through the power supply circuit and performs AC-DC conversion processing on the AC current to output DC current with a specified voltage to the charging circuit.

[0083] It is understood that the first line and the second line can be two charging lines with the same circuit structure, or they can be two charging lines with different circuit structures.

[0084] The first switching assembly is used to control the connection between the first capacitor assembly and the DC power supply and the battery; the second switching assembly is used to control the connection between the second capacitor assembly and the DC power supply and the battery.

[0085] Here, both the first capacitor assembly and the second capacitor assembly may include one or more capacitors. For example, if the first capacitor assembly includes multiple capacitors, the total capacitance of the first capacitor assembly can be increased by connecting the multiple capacitors in parallel. Both the first switching assembly and the second switching assembly may include at least two switching devices.

[0086] It should be noted that, since the first switching assembly is used to control the on / off state of the first connection between the first capacitor assembly and the DC power supply, and the second connection between the first capacitor assembly and the battery; and the on / off state of the first connection and the on / off state of the second connection are opposite; therefore, the first switching assembly includes at least two switching devices, and the switching states of the switching devices are opposite. Similarly, the second switching assembly also includes at least two switching devices.

[0087] When the first switch assembly is in the first state and the second switch assembly is in the second state, the connection between the first capacitor assembly and the DC power supply in the first circuit is disconnected, while the connection with the battery is made conductive. The first capacitor assembly is in a discharging state and charges the battery. At this time, the connection between the second circuit assembly and the DC power supply is made conductive, while the connection with the battery is disconnected. The second capacitor assembly is in a charging state and receives charging from the DC power supply.

[0088] When the first switch assembly is in the second state and the second switch assembly is in the first state, the connection between the first capacitor assembly and the DC power supply in the first circuit is made on, and the connection between the first capacitor assembly and the battery is made off. The first capacitor assembly is in a charging state and receives charging from the DC power supply. At this time, the connection between the second circuit assembly and the DC power supply is made off, and the connection between the second circuit assembly and the battery is made on. The second capacitor assembly is in a discharging state and charges the battery.

[0089] Here, both the first switch component and the second switch component switch their switching states according to a preset time period, and the first switch component and the second switch component are in different switching states within the same time period.

[0090] It should be noted that the first state and the second state are used to describe different switching states of multiple switching devices within the first switching assembly and the second switching assembly, respectively. Since the first switching assembly and the second switching assembly contain different numbers of switching devices, the switching states of each switching device corresponding to the first state and the second state may also be different.

[0091] Therefore, this disclosure does not limit the specific switching states of the switching components corresponding to the first state and the second state. All switching states in which the capacitor component connected to the switching component is disconnected from the DC power supply and the connection between the capacitor component and the battery is turned on when the switching component is in the first state, and all switching states in which the capacitor component connected to the switching component is turned on and the connection between the capacitor component and the battery is turned off when the switching component is in the second state, all fall within the protection scope of this disclosure.

[0092] In this embodiment of the disclosure, the first switch component and the second switch component switch 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, thereby realizing the alternating discharge of the first capacitor component on the first line and the second capacitor component on the second line to charge the battery to be charged in the terminal device.

[0093] For example, in the first half of the charging cycle, the first switch component switches to the first state and the second switch component switches to the second state, and the first capacitor component on the first line charges the device; in the second half of the charging cycle, the first switch component switches to the second state and the second switch component switches to the first state, and the second capacitor component on the second line charges the device.

[0094] Optionally, the first switching assembly includes: a first controlled switching assembly and a second controlled switching assembly;

[0095] The second switching assembly includes: a third controlled switching assembly and a fourth controlled switching assembly;

[0096] 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 turned on.

[0097] 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 turned on, and the second controlled switch component and the third controlled switch component are turned off.

[0098] In this embodiment of the disclosure, the first switching assembly includes: a first controlled switching assembly and a second controlled switching assembly; wherein, the first controlled switching assembly can be used to control the on / off state of the connection between the first capacitor assembly and the DC power supply; and the second controlled switching assembly can be used to control the on / off state of the connection between the second capacitor assembly and the battery.

[0099] The second switching assembly includes a third controlled switching assembly and a fourth controlled switching assembly; wherein, the third controlled switching assembly can be used to control the on / off state of the connection between the second capacitor assembly and the DC power supply; and the fourth controlled switching assembly can be used to control the on / off state of the connection between the second capacitor assembly and the battery.

[0100] Here, the controlled switching component is an electrical device with switching characteristics, and can be any type of switch that can be controlled to adjust its on / off state. For example, the controlled switching component can be a metal-oxide-semiconductor field-effect transistor (MOSFET), a bipolar junction transistor (BJT), or an insulated-gate bipolar transistor (IGBT), etc.

[0101] It should be noted that, due to the strong anti-static capability of MOSFETs, in some embodiments, the controlled switching component can be a switching circuit composed of one or more MOSFETs.

[0102] When the first switch assembly is in the first state and the second switch assembly is in the second state, by controlling the first and fourth controlled switch assemblies to disconnect and the second and third controlled switch assemblies to connect, the connection between the first capacitor assembly and the DC power supply is disconnected, while the connection between the first capacitor assembly and the battery is connected. At this time, the first capacitor assembly is in a discharging state, charging the battery. Simultaneously, the connection between the second capacitor assembly and the battery is disconnected, while the connection between the second capacitor assembly and the DC power supply is connected. At this time, the second capacitor assembly is in a charging state, receiving charging from the DC power supply.

[0103] When the first switch assembly is in the second state and the second switch assembly is in the first state, by controlling the first and fourth controlled switch assemblies to be turned on, and the second and third controlled switch assemblies to be turned off, the connection between the first capacitor assembly and the DC power supply is made conductive, while the connection between the first capacitor assembly and the battery is disconnected. At this time, the first capacitor assembly is in a charging state, receiving charging from the DC power supply. Simultaneously, the connection between the second capacitor assembly and the battery is made conductive, while the connection between the second capacitor assembly and the DC power supply is disconnected. At this time, the second capacitor assembly is in a discharging state, charging the battery.

[0104] Optionally, the first capacitor assembly includes a plurality of first capacitors; the second capacitor assembly includes a plurality of second capacitors.

[0105] The first switch assembly is in the first state and the second switch assembly is in the second state. The plurality of first capacitors in the first line are connected in parallel to form a plurality of charging circuits to charge the battery. The plurality of second capacitors in the second line are connected in series to receive charging from the DC power supply.

[0106] When the first switching component is in the second state and the second switching component is in the first state, the plurality of first capacitors in the first line are connected in series to receive charging from the DC power supply; and the plurality of second capacitors in the second line are connected in parallel to form a plurality of charging circuits to charge the battery.

[0107] In this embodiment of the 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.

[0108] The circuit architecture of the first line, which consists 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 line, which consists of the third controlled switch assembly, the fourth controlled switch assembly, and the plurality of second capacitors.

[0109] When the first switch component is in the first state and the second switch component is in the second state, that is, when the first controlled switch component and the fourth controlled switch component are open, and the second controlled switch component and the third controlled switch component are on, multiple first capacitors in the first line are connected in parallel, and multiple second capacitors in the second line are connected in series.

[0110] In the current state, the connections of the multiple parallel first capacitors to the DC power supply are all disconnected, while their connections to the battery are all connected, and the multiple first capacitors are in a discharging state. The multiple first capacitors and the battery form multiple charging circuits, and the multiple first capacitors use these multiple charging circuits to charge the battery respectively. At this time, the sum of the current values ​​in the charging circuits containing the multiple parallel first capacitors is equal to the input current value of the battery.

[0111] The second line containing the multiple series-connected second capacitors is connected to the DC power supply and disconnected from the battery, putting the multiple second capacitors in a charging state. The DC power supply charges the multiple second capacitors connected in series on the second line. At this time, the sum of the voltage values ​​of the multiple series-connected second capacitors is equal to the voltage value of the DC power supply.

[0112] When the first switch component is in the second state and the second switch component is in the first state, that is, when the first controlled switch component and the fourth controlled switch component are turned on, and the second controlled switch component and the third controlled switch component are turned off, multiple first capacitors in the first line are connected in series, and multiple second capacitors in the second line are connected in parallel.

[0113] In the current state, the first line containing the multiple series-connected first capacitors is connected to the DC power supply but disconnected from the battery, and the multiple first capacitors are in a charging state; the DC power supply charges the multiple first capacitors connected in series on the first line. At this time, the sum of the voltage values ​​of the multiple series-connected first capacitors is equal to the voltage value of the DC power supply.

[0114] The multiple parallel-connected second capacitors are disconnected from the DC power supply but connected to the battery, thus charging. These second capacitors form multiple charging circuits with the battery, charging the battery through each circuit. At this time, the sum of the current values ​​in the charging circuits containing the parallel-connected second capacitors equals the input current value of the battery.

[0115] It should be noted that when multiple capacitors are connected in series, the voltage value of each capacitor is related to the capacitance value of the capacitor.

[0116] Here, this disclosure does not limit the connection relationship between the multiple switching devices in the first controlled switch assembly and the second controlled switch assembly and the multiple first capacitors, or the connection relationship between the multiple switching devices in the third controlled switch assembly and the fourth controlled switch assembly and the multiple second capacitors.

[0117] All connection relationships that satisfy the following conditions are within the protection scope of this disclosure: when the first controlled switch assembly and the fourth controlled switch assembly are off, and the second controlled switch assembly and the third controlled switch assembly are on, multiple first capacitors are connected in parallel and multiple second capacitors are connected in series; and when the first controlled switch assembly and the fourth controlled switch assembly are on, and the second controlled switch assembly and the third controlled switch assembly are off, multiple first capacitors are connected in series and multiple second capacitors are connected in parallel.

[0118] For example, taking a first capacitor assembly comprising three first capacitors and a second capacitor assembly comprising three second capacitors as an example, the charging circuit is described. Figure 4 As shown, Figure 4 This is a circuit diagram of a charging circuit according to an exemplary embodiment. Figure 2 The first capacitor assembly includes: a first capacitor C. F11 C F12 and C O1 The second capacitor assembly includes: a second capacitor C F21 C F22 and C O2 The first controlled switch assembly includes transistors Q11-Q13, the second controlled switch assembly includes transistors Q14-Q17, the third controlled switch assembly includes transistors Q21-Q23, and the fourth controlled switch assembly includes transistors Q24-Q27.

[0119] First circuit: The first terminal of transistor Q11 is connected to the DC power supply, and the second terminal is connected to the first capacitor C. F11 The first terminal of transistor Q16 is connected; the first capacitor C F11 The second terminal is connected to the second terminal of transistor Q14 and the second terminal of transistor Q12, respectively; the first terminal of transistor Q14 is connected to the first capacitor C. O1 The second end is connected.

[0120] The second terminal of transistor Q16 is connected to the second terminal of transistor Q17 and the first capacitor C, respectively. O1The first terminal is connected; the first terminal of transistor Q17 is connected to the first terminal of transistor Q12 and the first capacitor C respectively. F12 The first terminal is connected; the first capacitor C F12 The second terminal is connected to the first terminal of transistor Q15 and the second terminal of transistor Q13, respectively; the second terminal of transistor Q15 is connected to the first capacitor C. O1 The second terminal is connected; the first terminal of transistor Q13 is connected to the first capacitor C. O1 The first terminal is connected to the first capacitor C. O1 The second terminal is grounded; the first capacitor C O1 The first and second ends are connected to the positive and negative terminals of the battery, respectively.

[0121] Second circuit: The first terminal of transistor Q21 is connected to the DC power supply, and the second terminal is connected to the second capacitor C. F21 The first terminal is connected to the first terminal of transistor Q26; the second capacitor C F21 The second terminal is connected to the first terminal of transistor Q24 and the second terminal of transistor Q22, respectively; the second terminal of transistor Q24 is connected to the second capacitor C. O2 The second end is connected.

[0122] The second terminal of transistor Q26 is connected to the second terminal of transistor Q27 and the first capacitor C, respectively. O2 The first terminal is connected; the first terminal of transistor Q27 is connected to the first terminal of transistor Q22 and the second capacitor C respectively. F22 The first terminal is connected; the second capacitor C F22 The second terminal is connected to the first terminal of transistor Q25 and the second terminal of transistor Q23, respectively; the first terminal of transistor Q23 is connected to the second capacitor C. O2 The first terminal is connected to the second capacitor C. O2 The second terminal is grounded; the second capacitor C O2 The first and second ends are connected to the positive and negative terminals of the battery, respectively.

[0123] It should be noted that the first terminal of the transistor in the charging circuit is the drain and the second terminal is the source; the first terminal of the capacitor is the positive terminal and the second terminal is the negative terminal.

[0124] When transistors Q11-Q13 and Q24-Q27 are off, and transistors Q14-Q17 and Q21-Q23 are on, the first capacitor C F11 C F12 and C O1 Connected in parallel, forming 3 charging circuits: First charging circuit: C O1 And battery; second charging circuit: Q17, C F12 Q15 and battery; third charging circuit: Q16, C F11Q14, the battery is charged through the above three charging circuits.

[0125] At this time, the second capacitor C F21 C F22 and C O2 This forms a series circuit, namely, DC power supply, Q21, and C. F21 Q22, C F22 Q23, C O2 and grounding terminal; DC power supply to C F21 C F22 and C O2 Charge it.

[0126] When transistors Q11-Q13 and Q24-Q27 are turned on, and transistors Q14-Q17 and Q21-Q23 are turned off, the first capacitor C... F11 C F12 and C O1 This forms a series circuit, namely, DC power supply, Q11, and C. F11 Q12, C F12 Q13, C O1 and grounding terminal; DC power supply to C F11 C F12 and C O1 Charge it.

[0127] At this time, the second capacitor C F21 C F22 and C O2 Connected in parallel, forming 3 charging circuits: First charging circuit: C O2 And battery; second charging circuit: Q27, C F22 Q25 and battery; third charging circuit: Q26, C F21 Q24, the battery is charged through the above three charging circuits.

[0128] Optionally, the ratio of the input voltage to the output voltage of the charging circuit is positively correlated with the number of the first capacitor and / or the second capacitor.

[0129] In this embodiment of the disclosure, the capacitance values ​​of the 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.

[0130] If the first capacitor assembly includes N first capacitors, and the second capacitor assembly includes N second capacitors, 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, the multiple first capacitors in the first line are connected in series, and the multiple second capacitors in the second line are connected in parallel.

[0131] A DC power supply charges multiple first capacitors. When the capacitance values ​​of the multiple first capacitors are the same, the voltage values ​​of each first capacitor are the same, and the ratio of the voltage value of the DC power supply to the voltage value of a single first capacitor, that is, the ratio of the input voltage and the output voltage of the charging circuit, is N.

[0132] Since the multiple parallel second capacitors are in a discharging state, when the capacitance values ​​of the multiple second capacitors are the same, the current value in the charging circuit formed by each second capacitor is the same, and the input current of the battery is N times the current value in the charging circuit formed by each second capacitor.

[0133] 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 turned on, the multiple first capacitors in the first line are connected in series, and the multiple second capacitors in the second line are connected in parallel; the ratio of the voltage value of the DC power supply to the voltage value of a single second capacitor, that is, 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 the current value in the charging loop formed by each first capacitor.

[0134] Thus, in this embodiment of the present disclosure, the ratio of the input voltage to the output voltage of the charging circuit can be adjusted by changing the number of the first capacitor and / or the second capacitor in the charging circuit. This allows for an increase in charging power by increasing the charging voltage while keeping the charging current constant. It also effectively reduces the current at the front end of the charging circuit, reduces stress on the front-end components of the charging circuit, and improves the safety of the charging circuit.

[0135] Optionally, the circuit further includes:

[0136] A switch control circuit is connected to the first controlled switch assembly, the second controlled switch assembly, the third controlled switch assembly, and the fourth controlled switch assembly;

[0137] The switch control circuit is used to output a first control signal to the first controlled switch assembly and the fourth controlled switch assembly, and to output a second control signal to the second controlled switch assembly and the third controlled switch assembly; wherein the second control signal is a reverse signal formed by reversing the first control signal.

[0138] In this embodiment of the disclosure, the switch control circuit is configured to generate a first control signal for controlling a first controlled switch assembly and a fourth controlled switch assembly, and a second control signal for controlling a second controlled switch assembly and a third controlled switch assembly, wherein the second control signal is the inverse signal of the first control signal.

[0139] If the first control signal is at a first level and the second control signal is at a second level, the first controlled switch component and the fourth controlled switch component are in an open state, and the second controlled switch component and the third controlled switch component are in a closed state; multiple first capacitors in the first line are in a parallel discharge state to charge the battery, and multiple second capacitors in the second line are in a series charging state to receive charging from DC power.

[0140] If the first control signal is at the second level and the second control signal is at the first level, the first controlled switch component and the fourth controlled switch component are in the on state, and the second controlled switch component and the third controlled switch component are in the off state; multiple first capacitors in the first line are in a series charging state, receiving charging from DC power; multiple second capacitors in the second line are in a parallel discharging state, charging the battery.

[0141] The first level here can be understood as a low level, while the second level is a high level relative to the first level.

[0142] Optionally, the switch control circuit includes:

[0143] A clock signal generation circuit is used to generate the first control signal that varies in the time domain, and to generate the second control signal by inverting the first control signal.

[0144] In this embodiment of the disclosure, the first control signal may be a clock signal, and the second control signal may be a clock signal that is the inverse of the first control signal.

[0145] The switch state control circuit further includes: an inverter;

[0146] The output terminal of the clock signal generating circuit is connected to the control terminals of the first controlled switch assembly and the fourth controlled switch assembly, and the input terminal of the inverter, respectively. The output terminal of the inverter is connected to the control terminals of the second controlled switch assembly and the third controlled switch assembly.

[0147] The inverter is used to invert the first control signal output by the clock signal generation circuit to obtain a second control signal, and input the second control signal to the control terminals of the second controlled switch assembly and the third controlled switch assembly.

[0148] like Figure 5 As shown, Figure 5This is a timing diagram illustrating a first control signal and a second control signal according to an exemplary embodiment. Under the control of the first control signal and the second control signal, the first controlled switch component and the fourth controlled switch component have the same switching state; the second controlled switch component and the third controlled switch component have the same switching state; and the first controlled switch component and the second controlled switch component have opposite switching states.

[0149] This embodiment generates a time-domain varying first control signal through a clock signal generation circuit, and reverses the first control signal to obtain a second control signal. The first control signal and the second control signal control the switching states of multiple controlled switch components in the charging circuit, thereby enabling multiple first capacitors and multiple second capacitors to alternately charge the battery. In this way, the opposite switching states of multiple controlled switch components can be controlled through only one switch control circuit, which ensures the synchronous switching of the opposite switching states of multiple controlled switch components and further simplifies the structure of the charging circuit.

[0150] Optionally, the first line further includes: a first unidirectional conducting element connected between the first capacitor assembly and the positive terminal of the battery to be charged, for allowing the charging current output by the first capacitor assembly to flow unidirectionally to the battery;

[0151] The second circuit further includes a second unidirectional conducting element connected between the second capacitor assembly and the positive terminal of the battery to be charged, for allowing the charging current output by the second capacitor assembly to flow unidirectionally to the battery.

[0152] It should be noted that unidirectional conducting elements are electronic components with unidirectional conductivity characteristics, such as diodes.

[0153] In this embodiment of the disclosure, the first unidirectional conducting element is used to control the direction of current flow in the first line; the second unidirectional conducting element is used to control the direction of current flow in the second line.

[0154] When the first switching component is in the first state and the second switching component is in the second state, the first capacitor component is in the discharging state and the second capacitor component is in the charging state. The first unidirectional conducting element allows the charging current output by the first capacitor component to flow unidirectionally to the battery to charge the battery. The second unidirectional conducting element prevents the current output by the battery or the first capacitor component from flowing in reverse to the second capacitor component.

[0155] When the first switch component is in the second state and the first switch component is in the first state, the first capacitor component is in a charging state and the second capacitor component is in a discharging state. The second unidirectional conducting element allows the charging current output by the second capacitor component to flow unidirectionally to the battery to charge the battery. The first unidirectional conducting element prevents the current output by the battery or the second capacitor component from flowing in reverse to the first capacitor component.

[0156] Figure 6 This is a flowchart illustrating a control method for a charging circuit according to an exemplary embodiment, such as... Figure 6 As shown, the control method includes:

[0157] Step S101: According to a preset time period, the first switch component and the second switch component are alternately controlled to switch between the first state and the second state, and the states of the first switch component and the second switch component are different within the same time period;

[0158] Step S102: When the first switch assembly is in the first state and the second switch assembly is in the second state, the first capacitor assembly in the first line charges the battery to be charged.

[0159] Step S103: When the first switch assembly is in the second state and the second switch assembly is in the first state, the second capacitor assembly in the second circuit charges the battery to be charged.

[0160] In this embodiment of the disclosure, the control method of the charging circuit is applied to the charging circuit shown in one or more of the above technical solutions. By controlling the first switching component and the second switching component in the charging circuit to switch between a first state and a second state, the first capacitor component in the first line and the second capacitor component in the second line of the charging circuit alternately charge the battery.

[0161] In the first half of the charging cycle, by controlling the first switching component to be in the first state and the second switching component to be in the second state, the connection between the first capacitor component in the first circuit and the battery is turned on, and the connection between the first capacitor component and the DC power supply is turned off. The first capacitor component is in a discharging state, and the battery is charged using the electrical energy stored in the first capacitor component. The connection between the second capacitor component in the second circuit and the DC power supply is turned on, and the connection between the second capacitor component and the battery is turned off. The second capacitor component is in a charging state, and the second capacitor component is charged using the DC power supply.

[0162] In the latter half of the charging cycle, the first switching component can be controlled to be in the second state. When the first switching component is in the first state, the connection between the first capacitor component in the first circuit and the DC power supply is turned on, and the connection between the first capacitor component and the battery is turned off. The first capacitor is in a charging state, and the DC power supply is used to charge the first capacitor component. The connection between the second capacitor component in the second circuit and the battery is turned on, and the connection between the second capacitor component and the DC power supply is turned off. The second capacitor component is in a discharging state, and the energy stored in the second capacitor component is used to charge the battery.

[0163] It should be noted that as the charging power of the charging circuit increases, the output ripple of the charging circuit also increases, which is very detrimental to the charging safety. Considering that the output ripple is inversely proportional to the capacitance value of the capacitors in the charging circuit and the switching frequency of the switching devices, the output ripple can be reduced by increasing the capacitance value or increasing the switching frequency. However, due to the limitations of the size and cost of the charging circuit, it is difficult to achieve a good ripple reduction effect by simply increasing the capacitance value; while increasing the switching frequency will lead to a significant increase in switching losses.

[0164] This embodiment of the invention uses a first capacitor assembly and a second capacitor assembly to alternately charge the battery. This increases the switching frequency of the entire charging circuit while keeping the switching frequency of the switching components in the first and second lines constant, thereby reducing the output ripple of the charging circuit and improving charging efficiency and safety.

[0165] Optionally, step S102, in which the first capacitor assembly in the first circuit charges the battery to be charged while the first switch assembly is in the first state and the second switch assembly is in the second state, includes:

[0166] 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, multiple charging circuits formed by multiple parallel first capacitors in the first line charge the battery; and multiple series second capacitors in the second line receive charging from the DC power supply.

[0167] Step S103, where the first switch assembly is in the second state and the second switch assembly is in the first state, involves the second capacitor assembly within the second circuit charging the battery to be charged, including:

[0168] When the first and fourth controlled switch components are off, and the second and third controlled switch components are on, multiple charging circuits formed by multiple parallel second capacitors in the second line charge the battery; and multiple series-connected first capacitors in the first line receive charging from the DC power supply.

[0169] In this embodiment of the present disclosure, the first and fourth controlled switch components of the charging circuit can be turned on and the second and third controlled switch components can be turned off by a switch control circuit. At this time, the multiple first capacitors in the first line are in parallel connection, and the connection between the multiple first capacitors and the DC power supply is disconnected. The multiple first capacitors are in a discharging state, and the multiple first capacitors and the battery form multiple charging circuits to charge the battery. Here, the input current value of the battery is equal to the sum of the charging current values ​​of the multiple charging circuits.

[0170] Meanwhile, multiple second capacitors in the second circuit are connected in series, and the connection between the multiple second capacitors and the DC power supply is conductive, while the connection between the multiple second capacitors and the battery is disconnected. The multiple first capacitors are in a charging state, and the multiple second capacitors and the DC power supply form an energy storage circuit, with the DC power supply charging the multiple second capacitors. Here, the voltage value of the DC power supply is equal to the sum of the voltage values ​​of the multiple second capacitors.

[0171] The first and fourth controlled switch components of the charging circuit can be disconnected, while the second and third controlled switch components are turned on, via a switch control circuit. At this time, the multiple first capacitors in the first line are connected in series and are in a charging state; the multiple first capacitors are charged by a DC power supply. Here, the voltage value of the DC power supply is equal to the sum of the voltage values ​​of the multiple first capacitors.

[0172] Simultaneously, multiple second capacitors in the second circuit are connected in parallel and are in a discharging state; these multiple second capacitors and the battery form multiple charging circuits to charge the battery. Here, the input current value of the battery is equal to the sum of the charging current values ​​of the multiple charging circuits.

[0173] This embodiment of the invention can adjust the circuit architecture in the first and second lines by controlling the switching states of each controlled switch component in the charging circuit. This allows multiple first capacitors or multiple second capacitors to achieve a voltage division effect when charged in series. When multiple first capacitors or multiple second capacitors discharge in parallel, while keeping the battery input current constant, the current in the first or second line is reduced, thus reducing line losses in the first or second line, improving charging efficiency, and effectively reducing the stress on electronic components in the first or second line, thereby improving circuit safety.

[0174] The following provides a specific example in conjunction with any of the above technical solutions. This disclosure provides a charging circuit, including:

[0175] The first circuit includes a first capacitor assembly and a first switch assembly and a third switch assembly connected to the first capacitor assembly;

[0176] The second circuit includes a second capacitor assembly and a second switch assembly and a fourth switch assembly connected to the second capacitor assembly;

[0177] Wherein, the first end of the first capacitor assembly is connected to the positive terminal of the battery to be charged through a first unidirectional conducting element, and the second end is connected to the negative terminal of the battery; the first end of the second capacitor assembly is connected to the positive terminal of the battery through a second unidirectional conducting element, and the second end is connected to the negative terminal of the battery.

[0178] The input terminals of the first line and the second line are both connected to a DC power supply so that the DC power supply can power the first capacitor assembly and the second capacitor assembly.

[0179] The first switch assembly, the second switch assembly, the third switch assembly, and the fourth switch assembly all switch states according to a preset time period, and the first switch assembly, the fourth switch assembly, the second switch assembly, and the third switch assembly are in different switch states within the same time period;

[0180] The first switch assembly and the fourth switch assembly are in a first state, and the second switch assembly and the third switch assembly are in a second state. The multiple capacitor elements in the first capacitor assembly are in a parallel discharge state, and the multiple capacitor elements in the second capacitor assembly are in a series charging state.

[0181] The first switch assembly and the fourth switch assembly are in the second state, and the second switch assembly and the third switch assembly are in the first state. The multiple capacitor elements in the first capacitor assembly are in a series charging state, and the multiple capacitor elements in the second capacitor assembly are in a parallel discharging state.

[0182] In this example, the first switch component and the second switch component are in different states, the first switch component and the fourth switch component are in the same state, the second switch component and the third switch component are in the same state, and the switching frequency is the same.

[0183] For example, such as Figure 7 As shown, Figure 7 This is a circuit diagram of a charging circuit according to an exemplary embodiment. Figure 3 The first switching assembly includes: first transistor assemblies Q11-Q13 and second transistor assemblies Q14-Q17; the second switching assembly includes: third transistor assemblies Q21-Q23 and fourth transistor assemblies Q24-Q27; the first capacitor assembly includes: three first capacitors C. F11 C F12 and CO1 The second capacitor assembly includes: three second capacitors C F21 C F22 and C O2 .

[0184] like Figure 8 As shown, Figure 8 It is based on Figure 7 The diagram shows the charging circuit in the first half of the charging cycle. In the first half of the charging cycle, the first transistor assembly Q11-Q13 and the fourth transistor assembly Q24-Q27 are turned on by the switching control circuit, while the second transistor assembly Q14-Q17 and the third transistor assembly Q21-Q23 are turned off. At this time, in the charging circuit, the first capacitor C... F11 C F12 and C O1 Series connection, second circuit C F21 C F22 and C O2 in parallel.

[0185] 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 That is, the first capacitor C F11 C F12 and C O1 They are connected in series and accept charging from a DC power source.

[0186] When the capacitance values ​​of the three first capacitors are the same, the voltage drop across each first capacitor is 1 / 3V. in The ratio of the input voltage to the output voltage before charging is 3:1.

[0187] Charging circuit path: First path: Second capacitor C O2 To the battery; Second path: Transistor Q25, second capacitor C F22 1. Transistor Q27 to the battery; 2. Third path: Transistor Q24, second capacitor C F21 Transistor Q26 connects to the battery. That is, the second capacitor discharges in parallel, forming multiple charging circuits to charge the battery.

[0188] When the capacitance values ​​of the three second capacitors are the same, the charging circuit of the charging circuit is three times the current of each charging loop.

[0189] like Figure 9 As shown, Figure 9 It is based on Figure 7The diagram shows the charging circuit in the second half of its cycle. In the second half of the charging cycle, the first transistor assembly Q11-Q13 and the fourth transistor assembly Q24-Q27 are turned off by the switching control circuit, while the second transistor assembly Q14-Q17 and the third transistor assembly Q21-Q23 are turned on. At this time, in the charging circuit, the first capacitor C... F11 C F12 and C O1 Parallel connection, second circuit C F21 C F22 and C O2 Series connection.

[0190] In this way, the battery is charged alternately by multiple first capacitors and multiple second capacitors in the first and second halves of the charging cycle. While keeping the switching frequency of each switching device in the charging circuit constant, the switching frequency of the entire charging circuit is increased, thereby effectively reducing charging ripple and improving battery safety.

[0191] Figure 10 This is a schematic diagram illustrating the structure of a control device for a charging circuit according to an exemplary embodiment. Applied to the charging circuits shown in one or more of the above-described technical solutions, see reference... Figure 10 The device 200 includes:

[0192] Control module 201 is used 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, and the states of the first switch component and the second switch component are different within the same time period;

[0193] The charging module 202 is used to charge the battery to be charged by the first capacitor component in the first line when the first switch component is in the first state and the second switch component is in the second state; and to charge the battery to be charged by the second capacitor component in the second line when the first switch component is in the second state and the second switch component is in the first state.

[0194] Optionally, the charging module 202 is further configured to:

[0195] 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, multiple charging circuits formed by multiple parallel first capacitors in the first line charge the battery; and multiple series second capacitors in the second line receive charging from the DC power supply.

[0196] When the first and fourth controlled switch components are off, and the second and third controlled switch components are on, multiple charging circuits formed by multiple parallel second capacitors in the second line charge the battery; and multiple series-connected first capacitors in the first line receive charging from the DC power supply.

[0197] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0198] This disclosure also provides a terminal device, including:

[0199] The charging circuit described in one or more of the above technical solutions;

[0200] A battery, connected to the charging circuit, is used to receive charging from the charging circuit.

[0201] In this embodiment of the present disclosure, by controlling the first switching component on the first line and the second switching component on the second line in the charging circuit to work alternately in different states, the first capacitor component on the first line and the second capacitor component on the second line alternately charge the battery. This increases the switching frequency of the entire charging circuit while keeping the switching frequency of the first and second switching components constant (i.e., the switching frequency of each switching device on the first and second lines constant), effectively reducing ripple and improving the charging efficiency and charging safety of the charging circuit.

[0202] This disclosure also provides a control device for a charging circuit, the device comprising:

[0203] processor;

[0204] Memory used to store executable instructions;

[0205] When the processor is configured to execute executable instructions stored in the memory, it implements the steps in the control method of the charging circuit described in one or more technical solutions.

[0206] Figure 11 This is a block diagram illustrating a terminal device 800 according to an exemplary embodiment. For example, the terminal device 800 may be a mobile phone, a mobile computer, etc.

[0207] Reference Figure 11 The terminal device 800 may include one or more of the following components: a processing component 802, a memory 804, a power supply 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.

[0208] Processing component 802 typically controls the overall operation of terminal device 800, such as operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the methods described above. Furthermore, processing component 802 may include one or more modules to facilitate interaction between processing component 802 and other components. For example, processing component 802 may include a multimedia module to facilitate interaction between multimedia component 808 and processing component 802.

[0209] Memory 804 is configured to store various types of data to support the operation of device 800. Examples of this data include instructions for any application or method operating on terminal device 800, contact data, phonebook data, messages, pictures, videos, etc. Memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, 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 storage, flash memory, magnetic disk, or optical disk.

[0210] Power supply component 806 provides power to various components of terminal device 800. Power supply component 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to terminal device 800.

[0211] Multimedia component 808 includes a screen that provides an output interface between the terminal device 800 and the user. 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 touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 808 includes a front-facing camera and / or a rear-facing camera. When the device 800 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0212] Audio component 810 is configured to output and / or input audio signals. For example, audio component 810 includes a microphone (MIC) configured to receive external audio signals when terminal device 800 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 804 or transmitted via communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

[0213] I / O interface 812 provides an interface between processing component 802 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0214] Sensor assembly 814 includes one or more sensors for providing status assessments of various aspects of terminal device 800. For example, sensor assembly 814 can detect the on / off state of device 800, the relative positioning of components such as the display and keypad of terminal device 800, changes in position of terminal device 800 or a component of terminal device 800, the presence or absence of user contact with terminal device 800, orientation or acceleration / deceleration of terminal device 800, and temperature changes of terminal device 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. 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, sensor assembly 814 may also include an accelerometer, gyroscope, magnetometer, pressure sensor, or temperature sensor.

[0215] Communication component 816 is configured to facilitate wired or wireless communication between terminal device 800 and other devices. Terminal device 800 can access wireless networks based on communication standards, such as Wi-Fi, 2G, or 3G, or combinations thereof. In one exemplary embodiment, communication component 816 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 816 also includes a near-field communication (NFC) module to facilitate short-range communication. 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.

[0216] In an exemplary embodiment, the terminal device 800 may 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 components to perform the methods described above.

[0217] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 804 including instructions, which can be executed by a processor 820 of a terminal device 800 to perform the above-described method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0218] Other embodiments of the invention will readily occur to those skilled in the art upon 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 that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0219] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A charging circuit, characterized in that, include: The first circuit includes a first capacitor assembly and a first switch assembly connected to the first capacitor assembly; The second circuit includes a second capacitor assembly and a second switch assembly connected to the second capacitor assembly; The input terminals of the first line and the second line are both connected to a DC power supply so that the DC power supply can power the first capacitor assembly and the second capacitor assembly. Both the first and second switching components switch states according to a preset time period, and the first and second switching components are in different switching states within the same time period. The first switching component includes a first controlled switching component and a second controlled switching component. The first controlled switching component is used to control the on / off state of the connection between the first capacitor component and the DC power supply, and the second controlled switching component is used to control the on / off state of the connection between the first capacitor component and the battery to be charged. The second switching component includes a third controlled switching component and a fourth controlled switching component. The third controlled switching component is used to control the on / off state of the connection between the second capacitor component and the DC power supply, and the fourth controlled switching component is used to control the on / off state of the connection between the second capacitor component and the battery to be charged. 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, the second controlled switch component and the third controlled switch component are turned on, the connection between the first capacitor component and the DC power supply is disconnected, the connection between the first capacitor component and the battery to be charged is turned on, and the first capacitor component discharges; the connection between the second capacitor component and the DC power supply is turned on, the connection between the second capacitor component and the battery to be charged is disconnected, and the second capacitor component charges. 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 turned on, the second controlled switch component and the third controlled switch component are turned off, the connection between the first capacitor component and the DC power supply is turned on, the connection between the first capacitor component and the battery to be charged is turned off, and the first capacitor component is charged; the connection between the second capacitor component and the DC power supply is turned off, the connection between the second capacitor component and the battery to be charged is turned on, and the second capacitor component is discharged.

2. The circuit according to claim 1, characterized in that, The first capacitor assembly includes: a plurality of first capacitors; the second capacitor assembly includes: a plurality of second capacitors; The first switch assembly is in the first state and the second switch assembly is in the second state. The plurality of first capacitors in the first line are connected in parallel to form a plurality of charging circuits to charge the battery. The plurality of second capacitors in the second line are connected in series to receive charging from the DC power supply. When the first switching component is in the second state and the second switching component is in the first state, the plurality of first capacitors in the first line are connected in series to receive charging from the DC power supply; and the plurality of second capacitors in the second line are connected in parallel to form a plurality of charging circuits to charge the battery.

3. The circuit according to claim 2, characterized in that, The ratio of the input voltage to the output voltage of the charging circuit is positively correlated with the number of the first capacitor and / or the second capacitor.

4. The circuit according to claim 1, characterized in that, The circuit also includes: A switch control circuit is connected to 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 to output a first control signal to the first controlled switch assembly and the fourth controlled switch assembly, and to output a second control signal to the second controlled switch assembly and the third controlled switch assembly; wherein the second control signal is a reverse signal formed by reversing the first control signal.

5. The circuit according to claim 4, characterized in that, The switch control circuit includes: A clock signal generation circuit is used to generate the first control signal that varies in the time domain, and to generate the second control signal by inverting the first control signal.

6. The circuit according to claim 1, characterized in that, The first circuit further includes: a first unidirectional conducting element connected between the first capacitor assembly and the positive terminal of the battery to be charged, for allowing the charging current output by the first capacitor assembly to flow unidirectionally to the battery; The second circuit further includes a second unidirectional conducting element connected between the second capacitor assembly and the positive terminal of the battery to be charged, for allowing the charging current output by the second capacitor assembly to flow unidirectionally to the battery.

7. A terminal device, characterized in that, include: The charging circuit as described in any one of claims 1-6; A battery, connected to the charging circuit, is used to receive charging from the charging circuit.

8. A control method for a charging circuit, characterized in that, Applied to the charging circuit as described in any one of claims 1-6, comprising: According to a preset time period, the first switch component and the second switch component are alternately controlled to switch between the first state and the second state, and the states of the first switch component and the second switch component are different within the same time period; When the first switch assembly is in the first state and the second switch assembly is in the second state, the first capacitor assembly in the first line charges the battery to be charged. When the first switch assembly is in the second state and the second switch assembly is in the first state, the second capacitor assembly in the second circuit charges the battery to be charged.

9. The method according to claim 8, characterized in that, The step of 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 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, multiple charging circuits formed by multiple parallel first capacitors in the first line charge the battery; and multiple series second capacitors in the second line receive charging from the DC power supply. The step of charging the battery to be charged by the second capacitor assembly in the second circuit when the first switch assembly is in the second state and the second switch assembly is in the first state includes: When the first and fourth controlled switch components are off, and the second and third controlled switch components are on, multiple charging circuits formed by multiple parallel second capacitors in the second line charge the battery; and multiple series-connected first capacitors in the first line receive charging from the DC power supply.

10. A control device for a charging circuit, characterized in that, Applied to the charging circuit as described in any one of claims 1-6, comprising: The control module is used 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, and the states of the first switch component and the second switch component are different within the same time period; A charging module is configured to charge a battery to be charged by a first capacitor component in a first circuit when the first switch component is in the first state and the second switch component is in the second state; and to charge a battery to be charged by a second capacitor component in a second circuit when the first switch component is in the second state and the second switch component is in the first state.

11. A control device for a charging circuit, characterized in that, include: processor; Memory used to store executable instructions; When the processor is configured to execute executable instructions stored in the memory, it implements the steps in the control method of the charging circuit of claim 8 or 9.

12. A non-transitory computer-readable storage medium, wherein instructions in the storage medium, when executed by a processor of an electronic device, enable the electronic device to perform the steps of the control method for the charging circuit of claim 8 or 9.

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