CN117614088A

CN117614088A - Electric energy processing circuit, method and electronic equipment

Info

Publication number: CN117614088A
Application number: CN202410100276.0A
Authority: CN
Inventors: 邓旭同
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2024-01-24
Filing date: 2024-01-24
Publication date: 2024-02-27

Abstract

The application provides an electric energy processing circuit, an electric energy processing method and electronic equipment, and can improve the cruising ability of a battery in a mode of improving the electric energy conversion efficiency of the battery. The circuit comprises: the first switch capacitor module is connected with the battery and used for acquiring the battery voltage and adjusting the battery voltage to be a first voltage; the direct-current converter is respectively connected with the first switch capacitor module and the electric load and is used for acquiring a first voltage output by the first switch capacitor module, adjusting the first voltage into a second voltage and outputting the second voltage to the electric load; the absolute difference between the first voltage and the second voltage is smaller than the absolute difference between the battery voltage and the second voltage.

Description

Electric energy processing circuit, method and electronic equipment

Technical Field

The present disclosure relates to the field of electronic devices, and in particular, to an electric energy processing circuit, an electric energy processing method, and an electronic device.

Background

In the using process of the terminal equipment, the battery is an important component of the terminal equipment because the battery can ensure the normal operation of all the components by the electric energy provided by the battery for the components of the terminal equipment.

However, the electric energy conversion efficiency of the battery in the related art is low, thereby making the cruising ability of the battery poor.

Therefore, how to improve the electric energy conversion efficiency of the battery is a technical problem to be solved.

Disclosure of Invention

In order to solve the technical problems, the application provides an electric energy processing circuit, an electric energy processing method and electronic equipment. In the embodiment of the application, the cruising ability of the battery can be improved by improving the electric energy conversion efficiency of the battery.

In a first aspect, the present application provides an electrical energy processing circuit for use in an electronic device, the electronic device including a battery, an electrical load, the electrical energy processing circuit comprising: the first switch capacitor module is connected with the battery and used for acquiring the battery voltage and adjusting the battery voltage to be a first voltage; the direct-current converter is respectively connected with the first switch capacitor module and the electric load and is used for acquiring a first voltage output by the first switch capacitor module, adjusting the first voltage into a second voltage and outputting the second voltage to the electric load; the difference between the first voltage and the second voltage is smaller than the difference between the battery voltage and the second voltage.

Through the electric energy processing circuit, the first switch capacitor module can adjust the battery voltage to be the first voltage and then output the first voltage to the input end of the direct current converter, and at the moment, the direct current converter can adjust the first voltage to be the second voltage and then supply electric energy for the electric load. Compared with the scheme that the direct current converter adjusts the battery voltage to the second voltage, the power processing circuit reduces the voltage difference at two ends of the direct current converter and improves the conversion efficiency of the direct current converter to the battery power, so that the cruising ability of the battery is improved.

Illustratively, the first switched capacitor module may include a second switched capacitor circuit, a second capacitor C2, and a fifth switch S5. The second switched capacitor circuit may include first to fourth switches S1 to S4 connected in series in sequence. For example, the second switched capacitor circuit may be a voltage converter with a capacitor as the energy storage element.

The dc converter may be a voltage converter with an inductance as an energy storage element, for example. For example, the dc converter may include one or more of a first BUCK (BUCK) converter, a BOOST (BOOST) converter, a BOOST-BUCK (BOOST-BUCK) converter.

The first buck converter is used for stepping down the input voltage to obtain an output voltage with a fixed voltage value.

The boost converter is used for boosting the input voltage to obtain an output voltage with a fixed voltage value.

Illustratively, the absolute difference between the first voltage and the second voltage is less than the absolute difference between the battery voltage and the second voltage. For example, for a buck converter, the difference between the first voltage and the second voltage is less than the difference between the battery voltage and the second voltage. For another example, for a boost converter, the difference between the second voltage and the first voltage is less than the difference between the second voltage and the battery voltage.

The first switched capacitor module is connected at one end to a battery, at the other end to an input of a dc converter, and at the output of the dc converter to an electrical load.

The range of the battery voltage may be 3v to 4.5v, for example.

The power consuming load may include, for example, a first power consuming load connected to the buck converter and a second power consuming load connected to the boost converter. For example, the second electrical load may be a horn, an audio Power Amplifier (PA), a radio frequency PA, a display screen, or the like.

According to a first aspect, the dc converter includes a first buck converter, the first voltage includes a first sub-voltage, and the first switched capacitor module is configured to buck the first voltage to obtain the first sub-voltage; wherein the first sub-voltage is greater than or equal to the second voltage.

In this way, the first switched capacitor module may reduce the voltage difference between the input end and the output end of the first buck converter by reducing the input voltage of the first buck converter, thereby improving the electrical energy conversion efficiency of the first buck converter. For example, the first switched capacitor module may reduce the battery voltage of 4V to 2V and provide the reduced battery voltage to the first buck converter, and if the output voltage of the first buck converter is 1.2V, the voltage difference across the first buck converter is reduced from 2.8V to 0.8V.

The first sub-voltage may be, for example, a voltage value obtained by the step-down converter, for example, the first sub-voltage may be a fixed voltage value. For example, the first sub-voltage may be 1.1V, 1.2V, 1.8V, or other voltages.

Illustratively, the first buck converter may be buck converter 1521.

Illustratively, the first buck converter may include one or more buck devices. One buck chip may include one or more first buck devices.

For example, the first buck converter may buck the boost converter in a first buck ratio.

According to a first aspect, or any implementation manner of the first aspect, the dc converter includes a boost converter, the first voltage includes a second sub-voltage, and the first switched capacitor module is configured to boost the first voltage to obtain the second sub-voltage; wherein the second sub-voltage is less than or equal to the second voltage.

In this way, the first switch capacitor module can reduce the voltage difference between the input end and the output end of the first boost converter by increasing the input voltage of the boost converter, so that the electric energy conversion efficiency of the boost converter is improved. For example, the first switched capacitor module may boost the battery voltage of 4V to 8V and provide the battery voltage to the boost converter, and if the output voltage of the boost converter is 9V, the voltage difference across the boost converter is reduced from 5V to 1V.

The second sub-voltage may be, for example, a voltage value obtained by boosting the boost converter, for example, the second sub-voltage may be a fixed voltage value. For example, the second sub-voltage may be 8V, 9V, etc.

Illustratively, the boost converter may be boost converter 1522.

Illustratively, the boost converter may include one or more boost devices. One boost chip may include one or more boost devices.

Illustratively, the boost converter may boost the boost converter in accordance with a boost ratio.

According to a first aspect, or any implementation manner of the first aspect, the first switched capacitor module includes: a first switch; the first connecting end of the second switch is connected with the second connecting end of the first switch, and the second connecting end of the second switch is connected with one end of the battery; the first connecting end of the third switch is connected with the second connecting end of the second switch; the first connecting end of the fourth switch is connected with the second connecting end of the third switch, and the second connecting end of the fourth switch and the other end of the battery are connected to the first reference potential end; the first connecting end of the fifth switch is connected with the first connecting end of the first switch; one end of the first capacitor is connected with the second connecting end of the first switch, and the other end of the first capacitor is connected to the first reference potential end; and one end of the second capacitor is respectively connected with the second connecting end of the fifth switch and the input end of the direct current converter, and the other end of the second capacitor is connected with the second reference potential end.

In this way, the voltage of the battery can be boosted in a boosting proportion or reduced in a first reducing proportion by controlling the charge storage capacities of the first switch and the fifth switch, so that the voltage regulation capacity of the first switch capacitor module is realized.

Illustratively, the first switch-fifth switch may be a MOS transistor, such as an NMOS transistor, a PMOS transistor, or the like.

For example, the capacitance value of the first capacitor and the capacitance value of the second capacitor may be equal, or not. The capacitance value of the first capacitor C1 may be 60 μf and the capacitance value of the second capacitor C2 may be 20 μf.

Illustratively, the first reference potential end may be the ground GND1, the second reference potential end may be the ground GND2, and the first reference potential end and the second reference potential end may be the same potential end, or different potential ends.

The first switch-fourth switch, the first capacitor, may be located inside the SC chip, for example.

Alternatively, when the dc converter is a boost converter, the first switched capacitor module may not include the second capacitor C2.

According to a first aspect, or any implementation manner of the first aspect, the power management circuit further includes: the voltage detector is connected with the battery and is used for collecting the battery voltage of the battery; and the controller is respectively connected with the voltage detector and the first switch capacitor module and is used for acquiring the battery voltage acquired by the voltage detector and controlling the first switch capacitor module to adjust the battery voltage to be the first voltage under the condition that the battery voltage meets the preset voltage adjustment condition.

Therefore, when the voltage meets the preset voltage adjustment condition, the technical scheme of the embodiment of the application can be executed again, and the reliability of voltage adjustment is improved.

The voltage detector may be, for example, an analog-to-digital converter or other circuit, element or functional module with voltage acquisition functionality. For example, the analog-digital converter comprises a positive input end Vin+ and a negative input end Vin-, wherein the positive input end Vin+ is connected with the positive electrode of the battery, and the negative input end Vin-is connected with the negative electrode of the battery.

The controller may be, for example, a system chip, a CPU, or the like having a structure, an element, or the like with a control function. For example, the system chip may include a plurality of pins for connecting with the SC chip, the control terminal of the fifth switch, and the control terminal of the sixth switch, respectively.

The preset voltage adjustment condition may be a condition that is required to be satisfied when the input voltage of the dc converter is adjusted by the first switched capacitor module.

According to a first aspect, or any implementation manner of the first aspect, the power management circuit further includes: and the controller is used for controlling the first switch capacitor module to step down the first voltage to obtain a first sub-voltage under the condition that the battery voltage is greater than or equal to a first voltage threshold value.

Therefore, when the battery voltage is greater than or equal to the first voltage threshold, the first voltage after the voltage reduction of the first switched capacitor module can ensure that the first buck converter works normally, and at the moment, the controller can control the first switched capacitor module to reduce the voltage when determining that the first buck converter can work normally according to the battery voltage, so that the normal work of the first buck converter is ensured.

The first voltage threshold may be, for example, a threshold voltage value at which the first switched capacitor module is able to step down in a fixed ratio. Specifically, the first voltage threshold is determined according to a buck ratio of the first switched capacitor module, a minimum input voltage of the first buck converter.

The product of the first voltage threshold and the buck ratio is illustratively greater than or equal to the minimum input voltage of the first buck converter.

In an exemplary embodiment, when the first buck converter includes a plurality of buck devices, and each buck device corresponds to one output voltage, a product of the first voltage threshold and the buck ratio is greater than or equal to a maximum value of minimum input voltages of the plurality of buck devices. Wherein one buck chip may include one or more buck devices.

For example, when the first buck converter includes a plurality of buck devices, the first voltage threshold may be determined based on a buck ratio of the second switched capacitor circuit 151, a minimum input voltage of the buck device that is operating.

For example, when the first buck converter includes a plurality of buck devices, the first voltage threshold may be determined according to power consumption of the sub-loads to which the plurality of buck devices are connected.

For example, when the first buck converter includes a plurality of buck devices, a product of the first voltage threshold and the buck ratio is greater than or equal to a minimum value of the minimum input voltages of the plurality of buck devices.

According to a first aspect, or any implementation manner of the first aspect, the power management circuit further includes: and the controller is used for controlling the first switch capacitor module to boost the first voltage to obtain the second sub-voltage under the condition that the battery voltage is smaller than or equal to the second voltage threshold.

Therefore, when the battery voltage is smaller than or equal to the second voltage threshold, the first voltage after the first switch capacitor module is boosted can ensure that the boost converter works normally, and at the moment, the controller can control the first switch capacitor module to boost when determining that the boost converter can work normally according to the battery voltage, so that the normal work of the boost converter is ensured.

The second voltage threshold may be, for example, a threshold voltage value at which the first switched capacitor module is able to boost in a fixed ratio. In particular, the second voltage threshold may be determined according to a boost ratio of the first switched capacitor module, a maximum input voltage of the boost converter.

Illustratively, the product of the second voltage threshold and the boost ratio is less than or equal to the maximum input voltage of the boost converter 1522.

Illustratively, when the boost converter includes a plurality of boost devices, and each boost device corresponds to one output voltage, the product of the second voltage threshold and the boost ratio is less than or equal to a minimum of the maximum input voltages of the plurality of boost devices.

For example, when the boost converter includes a plurality of boost devices, the second voltage threshold may be determined based on a boost ratio of the first switched capacitor module, a maximum input voltage of the operating buck device.

For example, when boost converter 1522 includes a plurality of boost devices, the second voltage threshold may be determined based on the power consumption of the plurality of boost device-connected sub-loads.

For example, when the boost converter includes a plurality of boost devices, the product of the second voltage threshold and the boost ratio is less than or equal to a maximum value of the maximum input voltages of the plurality of boost devices.

According to a first aspect, or any implementation of the first aspect above, the dc converter comprises a first buck converter, the first voltage comprises a first sub-voltage, and the power management circuit further comprises: the controller is used for controlling the first switch capacitor module alternately according to the switch control logic of the first control stage and the second control switch; in the first control stage, the controller controls the first switch, the third switch and the fifth switch to be turned on, and controls the second switch and the fourth switch to be turned off so as to charge the first capacitor and the second capacitor which are connected in series by using the battery; in a second control stage, the controller controls the fifth switch to be turned off so as to output the voltage of the second capacitor to the input end of the first buck converter; the first sub-voltage is the voltage of the second capacitor.

In this way, the controller can charge the first capacitor and the second capacitor by using the battery in the first control stage by controlling the on-off of the first switch and the fifth switch. In the second control stage, the divided voltage of the second capacitor is provided to the input terminal of the first buck converter. Because the first capacitor and the second capacitor which are connected in series form a voltage division structure, the voltage division of the second capacitor can be a certain proportion of battery voltage, and accordingly, when the voltage division of the second capacitor is used as the input voltage of the first buck converter, the equal proportion voltage reduction of the battery voltage is realized.

For example, the second control phase may be entered after the first and second capacitors are charged. And re-entering the first control stage after the second capacitor is discharged.

For example, in the first control phase, the voltage division of the first capacitor may be vbat×c1/(c1+c2), and the voltage division of the second capacitor may be vbat×c2/(c1+c2). Accordingly, the first depressurization ratio may be C2/(C1+C2).

The first switch, the fourth switch and the fifth switch may be controlled to be turned on, and the second switch and the third switch may be controlled to be turned off during the second control stage, so as to provide the input voltage to the first buck converter by using the divided voltage of the first capacitor. At this time, the first depressurization ratio may be C1/(c1+c2).

The controller may be connected to the control terminal of the fifth switch through a gate controller, so as to control on-off of the fifth switch. And the controller can also send a control signal to the SC chip so as to realize on-off control of the first switch and the fourth switch through the SC chip.

Alternatively, in the case where the capacitance value of the first capacitor is larger than the capacitance value of the second capacitor, the divided voltage of the first capacitor or the divided voltage of the second capacitor may be flexibly selected as the input voltage of the first buck converter according to the battery voltage. For example, when the battery voltage is large, in the second control stage, the voltage division of the second capacitor is used to provide the input voltage for the first buck converter. When the battery voltage is small, the voltage division of the first capacitor is utilized to provide the input voltage for the first buck converter.

According to a first aspect, or any implementation of the first aspect above, the dc converter comprises a boost converter, the first voltage comprises a second sub-voltage, and the power management circuit further comprises: the controller is used for controlling the first switch capacitor module alternately according to the switch control logic of the third control stage and the switch control logic of the fourth control switch; in the third control stage, the controller controls the first switch, the third switch and the fifth switch to be turned off, and controls the second switch and the fourth switch to be turned on so as to connect the first capacitor and the battery in parallel; in a fourth control stage, the controller controls the first switch, the third switch and the fifth switch to be turned on, controls the second switch and the fourth switch to be turned off so as to connect the first capacitor and the battery in series, and connects one end of the first capacitor with the input end of the boost converter; the second sub-voltage is the sum of the battery voltage and the voltage of the first capacitor.

In this way, the controller can charge the first capacitor by using the battery in the third control stage by controlling the on-off of the first switch and the fifth switch. In the fourth control stage, after the first capacitor and the battery are connected in series, the voltage of the first capacitor reaches 2 times of the battery voltage, at the moment, one end of the first capacitor is provided to the input end of the boost converter, so that the input voltage of the boost converter can be increased by 2 times, and the equal-proportion boost of the battery voltage is realized.

For example, the fourth control phase may be entered after the first capacitor is charged. And re-entering the third control stage after the first capacitor is discharged.

According to the first aspect, or any implementation manner of the first aspect, a sixth switch, one end of which is used for receiving the third voltage, and the other end of which is connected to the input terminal of the dc converter.

Thus, by means of the sixth switch, a further input voltage can be provided for the dc converter. When the first voltage cannot be normally provided for the direct-current converter, the third voltage can be provided for the direct-current converter by controlling the conduction mode of the sixth switch, so that the normal operation of the direct-current converter is ensured.

The third voltage may be, for example, an input voltage of the dc converter in a conventional supply mode.

Illustratively, the sixth switch may be a MOS transistor.

Illustratively, the control terminal of the sixth switch may be connected to the system-on-chip controller through the gate controller.

According to a first aspect, or any implementation of the first aspect above, the dc converter comprises a first buck converter, the first voltage comprises a first sub-voltage, and the power management circuit further comprises: and the controller is used for controlling the sixth switch to be conducted under the condition that the battery voltage is smaller than the first voltage threshold value so as to output the third voltage to the input end of the first buck converter, so that the first buck converter regulates the third voltage to the first sub-voltage.

Therefore, when the first sub-voltage after the voltage reduction of the first switched capacitor module cannot ensure the normal operation of the first buck converter, for example, when the first sub-voltage is lower than the second voltage, the third voltage is provided as the input voltage of the first buck converter, so that the normal operation of the first buck converter is ensured.

The third voltage is illustratively greater than or equal to the minimum input voltage of the first buck converter.

Alternatively, when the sixth switch is guaranteed to be turned on, the fifth switch may be controlled to be turned off in order to guarantee the reliability of electricity.

Alternatively, when the fifth switch is turned on, the sixth switch may be controlled to be turned off in order to secure the reliability of electricity.

According to a first aspect, or any implementation of the first aspect above, the dc converter comprises a boost converter, the first voltage comprises a second sub-voltage, and the power management circuit further comprises: and the controller is used for controlling the sixth switch to be conducted under the condition that the battery voltage is larger than the second voltage threshold value so as to output the third voltage to the input end of the boost converter, so that the boost converter adjusts the third voltage to the second sub-voltage.

Therefore, when the second sub-voltage after the first switch capacitor module is boosted cannot ensure that the boost converter works normally, for example, when the second sub-voltage is higher than the second voltage, the third voltage is provided as the input voltage of the boost converter, so that the normal work of the boost converter is ensured.

According to a first aspect, or any implementation manner of the first aspect, the power management circuit further includes: the controller is used for acquiring the charging voltage of the charging interface; and under the condition that the charging voltage is greater than or equal to a preset voltage threshold, controlling the sixth switch to be conducted so as to output a third voltage to the input end of the direct current converter, so that the direct current converter regulates the third voltage to be the first voltage.

The charging interface may be a USB interface conforming to the USB standard specification, specifically, may be a Mini USB interface, a Micro USB interface, a USB TypeC interface, or the like. For example, the charging interface in the embodiment of the present application may be a TypeC interface.

According to the first aspect, or any implementation manner of the first aspect, the third voltage is a battery voltage or a system voltage.

For example, when the third voltage is the battery voltage VBAT, the first connection terminal of the sixth switch is connected to the battery voltage to obtain the battery voltage VBAT.

For example, when the third voltage is the system voltage VPH, the first connection end of the sixth switch is connected to the battery voltage through the MOS transistor Qbat.

According to the first aspect, or any implementation manner of the first aspect, the electronic device further includes a charging interface, the first switched capacitor module is connected with the charging interface, and the first switched capacitor module is further configured to obtain a fourth voltage output by the charging interface, and step down the fourth voltage to obtain a fifth voltage; and outputting a fifth voltage to the battery to charge the battery with the fifth voltage.

Therefore, the first switch capacitor module can multiplex the original switch capacitor circuit in the fast charging circuit, and the power supply capability is considered while the charging function is ensured. And, the circuit structure is simplified, and the cost is reduced.

Optionally, the first switched capacitor module may be additionally provided to ensure independence of the charging process and the power supply process.

The fourth voltage may be, for example, the charging voltage VBUS.

The fifth voltage may be, for example, a charging voltage VBUS of 1/2.

According to the first aspect, or any implementation manner of the first aspect, the electronic device further includes a charging interface and a second buck converter, the electric energy management circuit further includes a second switched capacitor module, one end of the second switched capacitor module is connected with the battery, the other end of the second switched capacitor module is connected with one end of the second buck converter, the other end of the second buck converter is connected with the charging interface, and the second switched capacitor module is used for obtaining a battery voltage, boosting the battery voltage to obtain a sixth voltage, and outputting the sixth voltage to the charging interface.

Therefore, when the battery is reversely charged for external electric equipment, the electric energy conversion efficiency of the battery can be improved, and the cruising ability of the battery is improved.

Illustratively, the second switched-capacitor module is similar in structure and control logic to the first switched-capacitor module, and reference may be made to the description of the first switched-capacitor module.

In a second aspect, an embodiment of the present application provides a power management method, which is applied to the power management circuit in the first aspect or any possible implementation manner of the first aspect, including: the first switch capacitor module acquires battery voltage; the first switch capacitor module adjusts the battery voltage to a first voltage; the direct current converter adjusts the first voltage to a second voltage; the direct current converter outputs a second voltage to the electric load so as to utilize the second voltage to supply power to the electric load, wherein the absolute difference value of the first voltage and the second voltage is smaller than the absolute difference value of the battery voltage and the second voltage.

According to a second aspect, before the first switched capacitor module adjusts the battery voltage to the first voltage, the method further comprises: the voltage detector acquires the voltage of the battery to obtain the voltage of the battery; and the controller controls the first switch capacitor module to adjust the battery voltage to the first voltage under the condition that the battery voltage meets the preset voltage adjustment condition.

According to a second aspect, or any implementation of the second aspect above, the dc converter comprises a first buck converter, the first voltage comprising a first sub-voltage; the first switched capacitor module includes: the first switch, the second switch, the third switch, the fourth switch, the fifth switch, the first capacitor and the second capacitor are sequentially connected in series; the first connecting end of the fifth switch is connected with the first connecting end of the first switch; one end of the first capacitor is connected with the second connecting end of the first switch, and the other end of the first capacitor is connected to the first reference potential end; one end of the second capacitor is connected with the second connecting end of the fifth switch and the input end of the first buck converter respectively, and the other end of the second capacitor is connected with the second reference potential end; the method further comprises the steps of: the controller controls the first switch capacitor module alternately according to the switch control logic of the first control stage and the second control switch; in the first control stage, the controller controls the first switch, the third switch and the fifth switch to be turned on, and controls the second switch and the fourth switch to be turned off so as to charge the first capacitor and the second capacitor which are connected in series by using the battery; in the second control stage, the controller controls the fifth switch to be opened so as to output the voltage of the second capacitor to the input end of the first buck converter.

According to a second aspect, or any implementation of the second aspect above, the dc converter comprises a boost converter, the first voltage comprises a second sub-voltage: the first switched capacitor module includes: the first switch, the second switch, the third switch, the fourth switch, the fifth switch, the first capacitor and the second capacitor are sequentially connected in series; the first connecting end of the fifth switch is connected with the first connecting end of the first switch; one end of the first capacitor is connected with the second connecting end of the first switch, and the other end of the first capacitor is connected to the first reference potential end; one end of the second capacitor is connected with the second connecting end of the fifth switch and the input end of the boost converter respectively, and the other end of the second capacitor is connected with the second reference potential end; the method further comprises the steps of: the controller controls the first switch capacitor module alternately according to the switch control logic of the third control stage and the fourth control switch; in the third control stage, the controller controls the first switch, the third switch and the fifth switch to be turned off, and controls the second switch and the fourth switch to be turned on so as to charge the battery by using the first capacitor; in the fourth control stage, the controller controls the first switch, the third switch and the fifth switch to be turned on, controls the second switch and the fourth switch to be turned off so as to connect the first capacitor and the battery in series, and connects one end of the first capacitor with the input end of the boost converter.

According to a second aspect, or any implementation manner of the second aspect, the dc converter includes a first buck converter, the first voltage includes a first sub-voltage, and the controller controls the first switched capacitor module to adjust the battery voltage to the first voltage when the battery voltage meets a preset voltage adjustment condition, including: the controller outputs a third voltage to an input terminal of the first buck converter when the battery voltage is less than the first voltage threshold, so that the first buck converter adjusts the third voltage to a first sub-voltage.

According to a second aspect, or any implementation manner of the second aspect, the dc converter includes a boost converter, the first voltage includes a second sub-voltage, and the controller outputs a third voltage to an input terminal of the boost converter in a case that the battery voltage is greater than the second voltage threshold, so that the boost converter adjusts the third voltage to the second sub-voltage.

Any implementation manner of the second aspect and the second aspect corresponds to any implementation manner of the first aspect and the first aspect, respectively. The technical effects corresponding to the second aspect and any implementation manner of the second aspect may be referred to the technical effects corresponding to the first aspect and any implementation manner of the first aspect, which are not described herein.

In a third aspect, the present application provides an electronic device, including: a battery, an electrical load, the first aspect and the power management circuitry of any implementation of the first aspect.

Any implementation manner of the third aspect and any implementation manner of the third aspect corresponds to any implementation manner of the first aspect and any implementation manner of the first aspect, respectively. The technical effects corresponding to any implementation manner of the third aspect and the third aspect may refer to the technical effects corresponding to any implementation manner of the first aspect and the first aspect, which are not described herein again.

Drawings

Fig. 1A-1B schematically illustrate a forward charging scenario of a terminal device;

fig. 2A-2B schematically illustrate a reverse charging scenario of a terminal device;

fig. 3 shows a schematic diagram of a power supply scenario of a battery of an exemplary terminal device;

fig. 4 shows a schematic structural diagram of an electronic device according to an embodiment of the present application;

fig. 5 shows a schematic structural diagram of an electrical energy processing circuit according to an embodiment of the present application;

fig. 6A-6B are schematic structural diagrams of a switched capacitor circuit according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of another power processing circuit according to an embodiment of the present disclosure;

Fig. 8 shows a schematic structural diagram of a terminal device provided in an embodiment of the present application;

fig. 9 shows a schematic structural diagram of an electrical energy processing circuit according to an embodiment of the present application;

FIGS. 10A-10C are schematic diagrams illustrating control logic of a power processing circuit according to embodiments of the present application;

11A-11B illustrate a schematic structural diagram of an exemplary set of electrical energy storage modules provided in an embodiment of the present application;

FIGS. 12A-12C are control logic diagrams of another exemplary power processing circuit provided in accordance with embodiments of the present application;

FIG. 13 illustrates a schematic diagram of another exemplary power processing circuit provided in an embodiment of the present application;

FIG. 14 illustrates a schematic diagram of another exemplary power processing circuit provided in an embodiment of the present application;

fig. 15 shows a schematic structural diagram of a system chip according to an embodiment of the present application;

FIG. 16 illustrates an exemplary control logic diagram provided by embodiments of the present application;

fig. 17 shows a schematic structural diagram of another terminal device provided in an embodiment of the present application;

fig. 18 shows a schematic structural diagram of still another terminal device provided in an embodiment of the present application;

Fig. 19 is a schematic flow chart of a method for processing electric energy according to an embodiment of the present application;

FIG. 20 is a schematic flow chart of another power treatment method according to an embodiment of the present disclosure;

fig. 21 shows a schematic block diagram of an apparatus of an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone.

The terms first and second and the like in the description and in the claims of embodiments of the present application are used for distinguishing between different objects and not necessarily for describing a particular sequential order of objects. For example, the first target object and the second target object, etc., are used to distinguish between different target objects, and are not used to describe a particular order of target objects.

In the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

In the description of the embodiments of the present application, unless otherwise indicated, the meaning of "a plurality" means two or more. For example, the plurality of processing units refers to two or more processing units; the plurality of systems means two or more systems.

In the process of increasing development, terminal devices such as mobile phones, tablet computers and the like have become an indispensable item in the daily life of people. Among them, since the battery is used as a power source for each component of the terminal device, the battery becomes an essential and important component in the terminal device.

In the daily operation of the battery, the battery may supply electric power to the components of the terminal device. Or, the terminal device may also charge the device to be charged through its own battery. And the terminal equipment user can charge the battery of the terminal equipment through the external equipment so as to supplement the electric energy consumption of the battery in the process.

In order to facilitate understanding, a specific operation scenario of the battery in the terminal device will be described below by taking the terminal device 100 as an example of a mobile phone through several application scenarios. For convenience of description, a process of charging the terminal device by the external device (i.e., charging the battery in the terminal device) is referred to as forward charging, and a process of charging the device to be charged by the terminal device (i.e., charging the device to be charged by using the battery of the terminal device) is referred to as reverse charging.

As for the charge mode of the battery, it may be classified into a normal charge (may also be referred to as slow charge, low power charge, etc.) mode and a fast charge mode (the fast charge mode may include a normal fast charge mode and a super fast charge mode). Illustratively, fast charging in this application refers to charging in a charging mode with a charging power greater than 10W, which may be, for example, 18W, 22.5W, 40W, 66W, 100W, etc.

For example, fig. 1A illustrates a schematic diagram of a forward charging scenario of a terminal device. Referring to fig. 1A, the terminal device 100 may include a charging interface 110. The charging interface 110 may be a USB interface conforming to a Universal Serial Bus (USB) standard, specifically may be a Mini USB interface, a Micro USB interface, a USB Type C interface, etc., and in this embodiment, the charging interface 110 is illustrated by taking USB Type C as an example.

When it is necessary to perform wired charging of the terminal device 100, the terminal device 100 may be electrically connected to the external power supply 300 through the wired charger 200A. The wired charger 200A may be a fast charger (i.e., a charger supporting a fast charging protocol (Fast Charge Protocol, FCP)) or a super fast charger (i.e., a charger supporting a super fast charging protocol (Super Charger Protocol, SCP)). It should be noted that, in the normal charging scenario, the wired charger 200A may also be a normal charger (for example, the charging power is 10W).

Specifically, as shown in fig. 1A, the wired charger 200A may include a data line 210 and an adapter 220 (if a connection interface, such as a USB Type a connector, is integrated on the external power supply 300, the wired charger 200A may not include the adapter 220). The data line 210 has a first connector 211 and a second connector 212. The first connector 211 is used for connecting to the charging interface 110 of the terminal device 100, and the second connector 212 is used for connecting to the charging interface 221 (such as USB Type a interface) of the adapter or the connection interface of the external power supply 300. For example, the first connector 211 may be a USB Type C connector and the second connector 212 may be a USB Type a connector.

The external power source 300 may be an external device capable of providing power to the terminal device 100 (i.e., charging the terminal device 100). The external power source 300 may be, for example, a power outlet (as shown in fig. 1A), a computer, a server, a mobile phone with reverse charging function, etc., which is not particularly limited.

Note that the above example shows a scenario in which the terminal device 100 is wired-charged with the wired charger 200A. In other examples, the terminal device 200 may also have a wireless charging function, as will be described below in connection with fig. 1B.

Still another example, fig. 1B shows a schematic diagram of another forward charging scenario of a terminal device. Referring to fig. 1B, when it is necessary to wirelessly charge the terminal device 100, electrical connection between the terminal device 100 and the external power source 300 may be performed through the wireless charger 200B. The wireless charger 200B may be a fast charger, a super fast charger, or a common charger similar to the wired charger 200A, and reference may be made to the related description of the wired charger 200A in the above sections of the present application, which is not repeated herein.

Specifically, as shown in fig. 1B, wireless charger 200B may include a data line 210, an adapter 220, and a wireless charging head 230. The data line 210 and the adapter 220 may be referred to the related descriptions of the above parts of the embodiments of the present application, and will not be described herein.

For the wireless charging head 230, a wireless charging coil and a magnet (not shown in the figure) are provided therein. The wireless charging head 230 may be attracted to the terminal device 100 by a magnet. And, after the wireless charging head 230 is attracted to the terminal device 100, an alternating current may be transferred between the wireless charging coil of the wireless charging head 230 and the wireless charging coil of the terminal device 100, so that the terminal device 100 converts the received alternating current into a direct current after receiving the alternating current through its own wireless charging coil, and charges the battery.

It should be noted that, the terminal device 100 may also be placed on a wireless charging base for charging (without the data line 210), which is not particularly limited.

After the forward charging scenario of the terminal device 100 is introduced through fig. 1A to 1B, a description is next given of a reverse charging scenario that the terminal device may have.

Fig. 2A schematically illustrates an exemplary reverse charging scenario of a terminal device. It should be noted that, in the embodiment of the present application, the device to be charged 400 is illustrated by taking a tablet computer as an example, and the device to be charged may also be a mobile phone, an intelligent watch, etc., which is not particularly limited.

As shown in fig. 2A, the device to be charged 400 may include a charging interface 410. In this embodiment, the charging interface 410 may be a USB type c interface, and the charging interface 410 may refer to the related description of the charging interface 110 in the above-mentioned portions of the embodiment of the present application, which is not described herein again.

The data line 240 may include a third tab 241 and a fourth tab 242. Illustratively, the third joint 241 and the fourth joint 242 may each be a USB type c interface. As shown in fig. 2A, when it is required to reversely charge the device 400 to be charged using the terminal device 100, the third connector 241 is connected to the charging interface 110 of the terminal device 100, and the fourth connector 242 is connected to the charging interface 410 of the device 400 to be charged, so as to transfer the power supplied from the battery of the terminal device 100 to the battery of the device 400 to be charged.

Note that the above example shows a scenario in which the device to be charged 400 is wired reverse-charged, and in other reverse-charging scenarios, the terminal device 200 may also perform wireless reverse-charging of the device to be charged 400, and the following description will be made with reference to fig. 2B.

Still another example, fig. 2B shows a schematic diagram of another reverse charging scenario of a terminal device. It should be noted that, fig. 2B illustrates the device to be charged as a mobile phone, but it should be understood that the device to be charged may also be other devices supporting wireless charging functions, such as a smart watch, a stylus, a bluetooth headset, a tablet computer, a keyboard, etc.

Referring to fig. 2B, the terminal device 100 may start the wireless reverse charging function in advance. And, after the wireless charging area of the terminal device 100 is aligned with the wireless charging area of the device to be charged 500, the terminal device 100 may wirelessly charge the device to be charged 500.

It should be noted that, in addition to the forward charging function shown in fig. 1A to 1B and the reverse charging function shown in fig. 2A to 2B, the battery of the terminal device may also have a function of supplying power to the internal components of the terminal device. Next, description will be given with reference to fig. 3.

Fig. 3 shows an exemplary power supply scenario of a battery of an exemplary terminal device. As shown in fig. 3, the terminal device 100 may include a battery 120 and an electrical load 130.

The battery 120 may power an electrical load 130 such as a display 131, a camera 132, a speaker 133, a circuit board 13m, and the like.

After a plurality of use cases of the battery are introduced through the above, a hardware structure within the terminal device will be described with reference to the accompanying drawings.

Fig. 4 shows a schematic structural diagram of an electronic device according to an embodiment of the present application. It should be understood that the structure of the electronic device shown in fig. 4 may be applied to the terminal device 100 in the above embodiment. It should be understood that the electronic device shown in fig. 4 is only one example of an electronic device, and that an electronic device may have more or fewer components than shown in the figures, may combine two or more components, or may have a different configuration of components. The various components shown in fig. 4 may be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and/or application specific integrated circuits.

Fig. 4 (1) is a schematic front structural diagram of an electronic device, and fig. 4 (2) is a schematic back structural diagram of the electronic device. As shown in fig. 4, the electronic device includes a display module 10, a rear cover (also referred to as a battery cover) 20, and a center 30. The electronic device provided in the embodiment Of the present application may include, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an Ultra-Mobile Personal Computer (UMPC), a personal digital assistant (Personal Digital Assistant, PDA), a Point Of Sale (POS) machine, an interphone, a vehicle-mounted computer, a television, an intelligent wearable device (such as an intelligent watch or an intelligent bracelet), an intelligent home device (such as a bluetooth sound device), a vehicle data recorder, a security device, and other electronic devices with a charging function, where the embodiment Of the present application does not limit specific types Of the electronic devices. For convenience of explanation, the embodiment of the present application will be described by taking an electronic device as an example of a mobile phone.

The display module 10 includes a cover plate and a display screen which are stacked. The cover plate protects the display screen, for example. The display screen includes, for example, a liquid crystal display screen (Liquid Crystal Display, LCD), an organic light emitting diode (Organic Light Emitting Diode, OLED) display screen, an LED display screen, etc., wherein the LED display screen includes, for example, a Micro-LED display screen, a Mini-LED display screen, etc. The embodiment of the application does not limit the type of the display screen.

The material of the rear cover 20 may include, for example, a light-impermeable material such as plastic, a plain skin, glass fiber, etc.; light-transmitting materials such as glass may also be included. The material of the rear cover 20 is not limited in the embodiment of the present application.

The middle frame 30 includes an annular exterior member 31 and a support member (not shown) positioned within the annular exterior member 31 and between the display module 10 and the rear cover 20. The middle frame is also provided with a charging interface 70. The charging interface 70 may be an interface conforming to USB standard, specifically may be a Mini USB interface, a Micro USB interface, a USB Type C interface, or the like. In the embodiment of the application, the charging interface 70 may be used to connect a charger to forward charge the electronic device; the method can be used for reverse charging of the electronic equipment to other equipment to be charged; can be used for transmitting data between the electronic device and the peripheral device; and can also be used for connecting with a headset, and playing audio through the headset. The interface may also be used to connect other electronic devices, such as AR devices, etc.

The display module 10, the rear cover (also referred to as a battery cover) 20, and the ring-shaped exterior member 31 enclose a housing cavity in which a battery, a printed circuit board (Printed Circuit Board, PCB) 40, and a functional device 50 are disposed (both not shown in fig. 2A and 2B), and the functional device 50 includes a first functional component and a second functional component. The first functional component may be disposed on the PCB 40 and electrically connected with the PCB 40; the second functional component is not disposed on the PCB but is electrically connected to the PCB 40. The first functional component may include a processor, a power processing circuit (e.g., a power management chip and/or a charge management module, etc.), a display driving circuit, a measurement circuit, etc., and the second functional component may include a flash, a camera 55, etc. The devices are electrically connected through the PCB 40, thereby achieving signal transmission and interaction. The support may support a portion of the structure within the receiving cavity.

Wherein the processor may comprise one or more processing units, such as: the processors may include baseband processors, application processors (application processor, AP), modem processors, graphics processors (graphics processing unit, GPU), image signal processors (image signal processor, ISP), controllers, memories, video codecs, digital signal processors (digital signal processor, DSP), and/or neural-network processors (neural-network processing unit, NPU), etc. Wherein the different processing units may be separate devices or may be integrated in one or more processors.

A memory may be provided in the processor for storing instructions and data. In some embodiments, the memory in the processor is a cache memory. The memory may hold instructions or data that the processor has just used or recycled. If the processor needs to reuse the instruction or data, it can be called directly from the memory. Repeated access is avoided, and the waiting time of the processor is reduced, so that the efficiency of the system is improved.

In some embodiments, the processor may include one or more interfaces. The interfaces may include an integrated circuit (Inter-Integrated Circuit, I2C) interface, a serial peripheral interface (Serial Peripheral Interface, SPI), an integrated circuit built-in audio (Inter-Integrated Circuit Sound, I2S) interface, a pulse code modulation (Pulse Code Modulation, PCM) interface, a universal asynchronous receiver Transmitter (Universal Asynchronous Receiver/Transmitter, UART) interface, a mobile industry processor interface (Mobile Industry Processor Interface, MIPI), a General-Purpose Input/Output (GPIO) interface, a subscriber identity module (Subscriber Identity Module, SIM) interface, and/or a universal serial bus (Universal Serial Bus, USB) interface, among others.

The I2C interface is a bi-directional synchronous serial bus comprising a serial data line (SDA) and a serial clock line (derail clock line, SCL). In some embodiments, the processor may contain multiple sets of I2C buses. The processor may be coupled to a flash, camera 55, etc. via different I2C bus interfaces, respectively. In the embodiment of the application, the processor can be coupled with the measuring circuit through the I2C interface, so that the processor and the measuring circuit can communicate through the I2C bus interface, and the detection function of the electronic equipment is realized.

The charge management module is to receive a charge input from a charger. The charger can be a wireless charger or a wired charger. In some wired charging embodiments, the charge management module may receive a charging input of the wired charger through the charging interface 70. In some wireless charging embodiments, the charging management module may receive wireless charging input through a wireless charging coil of the electronic device. The charging management module can also supply power for the power utilization load of the electronic equipment through the power supply management module while charging the battery.

The power management module is used for connecting the battery, the charging management module and the processor. The power management module receives battery input and provides power to the electrical loads such as the PCB 40, processor, internal memory, external memory, display screen, camera 55, and wireless communication module 660.

It will be appreciated that the foregoing merely schematically illustrates some of the components comprised by an electronic device (terminal device), and that in practice there may be more or fewer components than those described above, or some components may be combined, some components may be separated, or a different arrangement of components may be provided. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

In fig. 4, the electronic device has a rectangular flat plate shape. In other alternative embodiments, the shape of the electronic device may also be square flat, circular flat, oval flat, etc. Of course, the electronic device may be a folder type electronic device or the like.

After the structure of the terminal device is described through fig. 4, since the external power source charges the battery of the terminal device and the battery of the terminal device supplies power to other power loads, the power processing circuit in the terminal device is implemented.

Fig. 5 is a schematic diagram illustrating a structure of a power processing circuit according to an embodiment of the present application. As shown in fig. 5, the terminal device 100 may include a charging interface 110 (which may be referred to as a charging interface 70 in fig. 4) a charging control switch S0, a battery 120, an electrical load 130, and an electrical energy processing circuit 140. The power processing circuit may include a first switched capacitor (Switch Capacitor Converter, SC) circuit 141 (which may be part of a charge management module) and a Direct Current-Direct Current (DCDC) converter 142 (which may be part of a power management module), among other things.

The first switched capacitor circuit 141 may also be referred to as a Charge Pump (Charge Pump), which may be part of the circuit of the SC chip. As shown in fig. 5, one end of the first switch capacitor circuit 141 is connected to the charging interface 110 through the charging control switch S0 (wherein the charging control switch S0 includes a first connection end, a second connection end and a control end (not shown in the figure), one end of the first switch capacitor circuit 141 is connected to the second connection end of the charging control switch S0, the first connection end of the charging control switch S0 is connected to the charging interface 110, the control end of the charging control switch S0 is connected to the controller), and the other end of the first switch capacitor circuit 141 is connected to one end of the battery 120 (positive electrode of the battery 120). The other end of the battery 120 (the negative electrode of the battery 120) is connected to a first reference potential end (such as ground GND1 in fig. 5). Specifically, the first switched capacitor circuit 141 may include a capacitor and a switch. The capacitor is used as an energy storage element of the first switched capacitor circuit 141, and the first switched capacitor circuit 141 can charge the battery 120 by converting the charging voltage VBUS input by the charging interface 110 into the battery voltage VBAT in a fixed ratio by controlling the on/off of the switch to charge and discharge the capacitor. In the embodiment of the present application, the battery voltage VBAT may be in a range of 3V (volts) to 4.5V.

Exemplary, fig. 6A shows a schematic structural diagram of a first switched capacitor circuit according to an embodiment of the present application. As shown in fig. 6A, the first switched capacitor circuit 141 includes a first capacitor C1 (flying capacitor), and a first switch S1, a second switch S2, a third switch S3, and a fourth switch S4 (i.e., a first switch S1-a fourth switch S4) connected in series in order. The first switch S1 to the fourth switch S4, the charge control switch S0, and the like may be metal-oxide semiconductor field effect transistors (Metal Oxide Semiconductor, MOS), or the like. In this embodiment of the present application, for each MOS transistor, the control end may refer to a Gate (Gate) of the MOS transistor, the first connection end may refer to a Source (Source) of the MOS transistor, the second connection end may refer to a Drain (Drain) of the MOS transistor, or the first connection end may refer to a Drain of the MOS transistor, and the second connection end may refer to a Source of the MOS transistor. It should be noted that, the first switch S1 to the fourth switch S4 may also be implemented as other electronic devices having a switching function, which is not limited thereto. And, the first capacitor C1 may be one capacitor device or a plurality of capacitor devices connected in parallel, which is not limited.

The first connection end of the first switch S1 is connected to the second connection end of the charging control switch S0, the second connection end of the first switch S1 is connected to the first connection end of the second switch S2, the second connection end of the second switch S2 is connected to the first connection end of the third switch S3, the second connection end of the third switch S3 is connected to the first connection end of the fourth switch S4, and the second connection end of the fourth switch S4 is connected to the first reference potential end (such as the ground GND1 in fig. 6A). And, in the case where the first switched capacitor circuit 141 is a circuit in the SC chip, and the SC chip further includes a switched capacitor controller, the switched capacitor controller may control the first switch S1 to the fourth switch S4 in the first switched capacitor circuit 141. Optionally, in the case that the SC chip further includes a charge control switch S0, the switched capacitor controller may further control the charge control switch S0. Specifically, the control terminal of the charging control switch S0 and the control terminals of the first switch S1 to the fourth switch S4 may be connected to the switched capacitor controller, so as to be turned on or off under the control of the switched capacitor controller.

One end of the first capacitor C1 is connected between the first switch S1 and the second switch S2, that is, one end of the first capacitor C1 is connected to the second connection end of the first switch S1, or, in other words, one end of the first capacitor C1 is connected to the first end of the second switch S2. The other end of the first capacitor C1 is connected between the third switch S3 and the fourth switch S4, which can be said to be that the other end of the first capacitor C1 is connected to the second connection end of the third switch S3, or which can be said to be that the other end of the first capacitor C1 is connected to the first end of the fourth switch S4.

And, one end of the battery 120 is connected between the second switch S2 and the third switch S3, that is, one end of the battery 120 is connected to the second connection end of the second switch S2, or, in other words, one end of the battery 120 is connected to the first connection end of the third switch S3. The other end of the battery 120 is connected to the second connection terminal of the fourth switch S4, that is, the other end of the battery 120 is connected to the first reference potential terminal.

In a fast charge scenario, taking a 2:1 buck conversion as an example, fig. 6B illustrates the buck process of the first switched capacitor circuit, and the first switched capacitor circuit 141 may be divided into two power transmission phases, which will be described one by one.

The first power transmission phase is a phase in which the external power source charges the first capacitor C1. Specifically, as shown in (1) in fig. 6B, the first switch S1 and the third switch S3 are turned on, the second switch S2 and the fourth switch S4 are turned off, at this time, the first capacitor C1 and the battery 120 are connected in series, the current can be transmitted along the current transmission path (1) shown by the dotted line, the charging voltage VBUS provided by the external power supply charges the first capacitor C1 and the battery 120 during the current transmission process, the potential difference across the first capacitor C1 gradually increases, and the second power transmission stage can be entered after the charging of the first capacitor C1 is completed.

The second power transmission phase, i.e. the phase in which the first capacitor is the battery 120 is charged quickly. Specifically, as shown in (2) in fig. 6B, the first switch S1 and the third switch S3 are turned off, the second switch S2 and the fourth switch S4 are turned on, at this time, the first capacitor C1 and the battery 120 are connected in parallel, the first capacitor C1 may charge the battery 120 along the current transmission path (2) shown by the dotted line, and after the current transmission path of the first capacitor C1 is ended, the first power transmission stage is re-entered, and so on until the battery 120 is charged.

It should be noted that, according to actual needs, the 1:1 voltage reduction can also be achieved through the first switched capacitor circuit 141. Specifically, the first switch S1 and the second switch S2 may be controlled to be turned on, and the third switch S3 and the fourth switch S4 may be controlled to be turned off to directly charge the battery 120 using the charging voltage VBUS.

After the first switched capacitor circuit 141 is described, a description of the direct current (DCDC) converter 142 is continued.

The dc converter 142 may be an inductive converter (i.e., a converter with an inductance as an energy storage element), such as a BUCK (BUCK) converter, a BOOST (BOOST) converter, a BOOST-BUCK (BOOST-BUCK) converter, etc. It should be noted that, in the embodiment of the present application, when the supply voltage of the load to which the step-up-down converter is connected is low, for example, 1.1V, 1.2V, etc., it may be determined that the step-up-down converter needs to perform the step-down function, and this may be regarded as the step-down converter. For another example, when the supply voltage of the load to which the step-up-down converter is connected is high, such as 8V, 9V, etc., it may be determined that the step-up-down converter needs to perform a step-down function, and may be regarded as the step-up converter at this time.

Specifically, with continued reference to fig. 5, there are two alternative ways of connecting the voltage input of the dc converter 142: in the first connection mode, the voltage input terminal of the dc converter 142 is connected to one end of the battery 120 through the first voltage reducing circuit 143, that is, the voltage input terminal of the dc converter 142 is connected to one end of the first voltage reducing circuit 143, and the other end of the first voltage reducing circuit 143 is connected to one end of the battery 120, in which connection mode the input voltage of the dc converter 142 is the system voltage VPH. Note that, the first step-down circuit 143 is a step-down converter in a bypass (bypass) state, and the bypass (bypass) state of the first step-down circuit 143 is equivalent to the MOS transistor Qbat. In the second connection, the voltage input terminal of the dc converter 142 is connected to one terminal of the battery 120, and in this connection, the input voltage of the dc converter is the battery voltage VBAT. The voltage output terminal of the dc converter 142 is connected to the power load 130.

Specifically, the dc converter 142 may convert an input voltage (system voltage VPH or battery voltage VBAT) into an output voltage of a fixed voltage value, and provide the output voltage to the power load 130 to enable power supply to the power load 130. In one embodiment, since a part of devices (hereinafter referred to as a first electrical load) in the terminal device needs a supply voltage of 1.1V, 1.2V, 1.8V, etc., and the battery voltage VBAT is generally in the range of 3-4, 5V, the dc converter 142 may include a buck converter, and the buck converter may buck the input voltage to obtain an output voltage with a fixed voltage value, such as an output voltage of 1.1V, 1.2V, 1.8V, etc., to supply the first electrical load. In another implementation, since an electronic device (hereinafter referred to as a second Power load) such as a speaker, an audio Power Amplifier (PA), a radio frequency PA, a display screen (such as a light emitting element in the display screen) in the terminal device may need a Power supply voltage of 8-9V, the dc converter 142 may include a boost converter, and the boost converter may boost an input voltage to obtain an output voltage with a fixed voltage value (such as 8V, 9V, etc.) to supply the Power to the second Power load. In the embodiment of the present application, the buck converter and the boost converter may output voltages of other values according to the actual power consumption scenario and specific power consumption requirement of the power consumption load of the terminal device, which is not particularly limited.

In other embodiments, the battery 120 may also charge an external device to be charged. Specifically, fig. 7 shows a schematic structural diagram of another power processing circuit according to an embodiment of the present application. Fig. 7 differs from fig. 5 in that the power processing circuit 140 may also include a buck converter 144. One end of the buck converter 144 is connected to the charging interface 110, and the other end of the buck converter 144 is connected to one end of the battery 120. When the battery 120 supplies power to the device to be charged, the current provided by the battery 120 may be transmitted along the current transmission path shown by the dotted arrow, where the buck converter 144 corresponds to a boost converter, and after the buck converter 144 boosts the voltage provided by the battery 120, the boosted power supply voltage is transmitted to the device to be charged through the charging interface 110.

However, the inventor researches and discovers that the electric energy conversion efficiency of the buck converter and the boost converter is often low, for example, the electric energy conversion efficiency may be only about 80%, and the endurance of the battery of the terminal equipment is affected. And, the inventors have also studied and found that, for a direct current converter such as a buck converter, a boost converter, etc., the larger the voltage difference between the input voltage and the output voltage thereof, the lower the electric energy conversion efficiency thereof.

Based on this, the inventor provides an electric energy processing scheme, wherein a switched capacitor circuit is arranged at the front end of a direct current converter such as a buck converter and a boost converter, and the voltage difference between two ends of the direct current converter such as the buck converter and the boost converter is reduced through the boosting and the reducing capabilities of the switched capacitor circuit, so that the electric energy conversion efficiency of the direct current converter such as the buck converter and the boost converter is improved, and the battery endurance capability of terminal equipment is improved.

Next, the following portions of the embodiments of the present application are described with reference to the accompanying drawings, to illustrate the power treatment scheme provided by the embodiments of the present application.

Embodiments of the present application provide a power processing circuit, which will be described below with reference to fig. 8-16.

Fig. 8 shows a schematic structural diagram of a terminal device according to an embodiment of the present application. As shown in fig. 8, the terminal device 100 may include a charging interface 110, a battery 120, an electrical load 130, a power processing circuit 150, an analog-to-digital converter (Analog to Digital Converter, ADC) 160, and a System On Chip (SOC) 170. And, the above devices may be disposed on a circuit board of the terminal device, such as a main board or a sub-board, which is not limited. The other contents of the charging interface 110, the battery 120, and the power load 130 may be referred to the related descriptions of the above-mentioned portions of the embodiments of the present application, which are not repeated here, and the following portions of the embodiments of the present application will describe the power processing circuit 150, the analog-to-digital converter 160, and the system chip 170 one by one.

The power processing circuit 150 may include a charge control switch S0, a second switched capacitor circuit 151, a fifth switch S5, a sixth switch S6, a second capacitor C2, and a direct current (DCDC) converter 152.

The second switched capacitor circuit 151, one end of the second switched capacitor circuit 151 is connected to the charging interface 110 through the charging control switch S0, and one end of the second switched capacitor circuit 151 is also connected to the dc converter 152 through the fifth switch S5. And the other end of the second switched capacitor circuit 151 is connected to one end of the battery 120. Fig. 9 illustrates a schematic structure of a power processing circuit according to an embodiment of the present application. As shown in fig. 9, the second switched capacitor circuit 151 may include a first switch S1 to a fourth switch S4, and a first capacitor C1. In connection, the second switched capacitor circuit 151 is similar to the first switched capacitor circuit 141, and is different from the first switched capacitor circuit 141 in that the first connection end of the first switch S1 in the second switched capacitor circuit 151 (i.e. one end of the second switched capacitor circuit 151) is further connected to the first connection end of the fifth switch S5. It should be noted that, in the embodiment of the present application, the number of the switched capacitor circuits in the second switched capacitor circuit 151 may be 1, 2 or 3, which may be set according to the actual requirement of the terminal device, which is not limited specifically. And, when the external power source charges the terminal device through the charging interface 110, the second switched capacitor circuit 151 may obtain the charging voltage VBUS through the charging interface 110, and perform the step-down process according to a preset step-down ratio (referred to as a second step-down ratio for short, for example, 1/2), and then perform the fast charging for the battery 120 by using the step-down voltage. Through multiplexing the second switched capacitor circuit 151, the technical scheme provided in the embodiment of the application can be realized by using the original second switched capacitor circuit 151 in the charging circuit without additionally arranging a switched capacitor circuit, so that the structural cost is reduced and the circuit structure is optimized.

And a fifth switch S5, which includes a first connection terminal, a second connection terminal, and a control terminal. The first connection terminal is connected to one end of the second switched capacitor circuit 151 and the second connection terminal of the charging control switch S0, the second connection terminal is connected to one end of the dc converter 152 and one end of the second capacitor C2, and the control terminal can be connected to the system chip 170. It should be noted that, the control terminal of the fifth switch S5 may also be connected to other control modules having a control function, which is not limited thereto. The fifth switch S5 may be implemented as a MOS transistor, or other device or functional unit having a switching function, for example, without limitation.

The sixth switch S6 may include a first connection terminal, a second connection terminal, and a control terminal. The first connection terminal of the sixth switch S6 is used for obtaining the system voltage VPH or the battery voltage VBAT, and specifically, the first connection terminal of the sixth switch S6 may be connected to one terminal of the battery 120 to obtain the battery voltage VBAT, or may be connected to one terminal of the battery 120 through a MOS transistor Qbat (the first BUCK (BUCK) circuit 143 in the byps state) to obtain the system voltage VPH. The second connection terminal of the sixth switch S6 is connected to the dc converter 152. And, the control terminal of the sixth switch S6 may be connected to the system chip 170. It should be noted that, the control terminal of the sixth switch S6 may be further connected to other control modules having a control function, which is not limited thereto, and the control terminal of the fifth switch S5 and the control terminal of the sixth switch S6 may be connected to the same control module or different control modules, which is not limited thereto.

A second capacitor C2 for performing charge storage, a first connection terminal of which may be connected to the other terminal of the fifth switch S5, one terminal of the dc converter 152, and the other terminal of which is connected to a second reference potential terminal (such as the ground GND2 in fig. 8), respectively. Note that the first reference potential end and the second reference potential end may be the same potential end or different potential ends, and are not particularly limited. It should be noted that, for any one of the first capacitor C1 and the second capacitor C2, it may include one capacitor element, or may be formed by connecting a plurality of capacitor elements in parallel, series, or series-parallel connection, which is not particularly limited.

The dc converter 152 may be an inductive dc converter, i.e. a converter using an inductor as an energy storage unit. Illustratively, the dc converter 152 may include one or more of a buck converter, a boost-buck converter. Illustratively, the buck converter may be implemented as a buck chip, the boost converter may be implemented as a boost chip, the boost-buck converter may be implemented as a boost-buck chip, or may be implemented as other structures besides a chip, without limitation.

In some embodiments, when the dc converter 152 includes a buck converter 1521, and the input voltage of the buck converter 1521 is high, the power processing circuit may provide the input voltage to the buck converter 1521 through two control stages, which will be described one by one.

In the first control phase D1, the battery 120 charges the capacitor. Fig. 10A illustrates a control logic diagram of an exemplary power processing circuit according to an embodiment of the present application. As shown in (1) of fig. 10A, at this stage, the first switch S1, the third switch S3, and the fifth switch S5 may be controlled to be turned on, and the second switch S2 and the fourth switch S4 may be controlled to be turned off, at which time, the current is transmitted along the current transmission path shown by the dashed arrow in (1) of fig. 10A, at which time, the equivalent circuit is shown in (2) of fig. 10A, the battery 120 charges the first capacitor C1 and the second capacitor C2, the first capacitor C1 and the second capacitor C2 connected in series form a voltage division structure, and as the charging proceeds, the voltage difference between the first capacitor C1 and the second capacitor C2 gradually increases until the voltage U1 between the first capacitor C1 reaches vbat×c1/(c1+c2), and after the voltage U2 between the second capacitor C2 reaches vbat×c2/(c1+c2), the charging is completed, and the second control stage D2 may be entered.

The second control phase D2, the capacitor is the process of providing the input voltage to the buck converter 1521. Fig. 10B illustrates a control logic diagram of another exemplary power processing circuit provided in an embodiment of the present application. As shown in (3) of fig. 10B, at this stage, the fifth switch S5 may be controlled to be turned off, and at this time, the equivalent circuit is shown in (4) of fig. 10B, and the second capacitor C2 provides the input voltage vbat×c2/(c1+c2) to the buck converter 1521, where C2/(c1+c2) may be used as a buck ratio (simply referred to as a first buck ratio) of the switched capacitor circuit 151. After the end of this round of discharge, the first control phase D1 can be re-entered, and the battery 120 charges the second capacitor C2. The ratio of the capacitance values of the first capacitor C1 and the second capacitor C2 may be determined by the voltage reduction ratio of the switched capacitor circuit. For example, if the switched capacitor circuit is 2:1 buck (i.e. the buck ratio is 1/2), i.e. the output voltage is reduced to half the input voltage, the capacitance values of the first capacitor C1 and the second capacitor C2 may be the same. For another example, if the switched capacitor circuit is configured to step down by 4:1 (i.e., the step-down ratio is 1/4), the output voltage is reduced to one fourth of the input voltage, and the capacitance of the second capacitor C2 is one third of the capacitance of the first capacitor C1. For example, if the capacitance value of the first capacitor C1 is 60 μf (microfarad), the capacitance value of the second capacitor C2 may be 20 μf.

It should be noted that, in the second control stage D2, the first capacitor C1 may also be used to provide the input voltage to the buck converter 1521. At this time, a control switch may be disposed at one end of the second capacitor C2, and in the second control stage D2, the first switch S1, the fourth switch S4, and the fifth switch S5 may be controlled to be turned on, and the second switch S2, the third switch S3, and the control switch are controlled to be turned off, so as to provide the input voltage for the buck converter 1521 by using the divided voltage VBAT of the first capacitor C1×c1/(c1+c2), where C1/(c1+c2) may be used as the buck ratio of the switched capacitor circuit 151. Alternatively, the voltage division of the first capacitor C1 or the voltage division of the second capacitor C2 may be flexibly selected to provide the input voltage to the buck converter 1521 according to the level of the battery voltage VBAT. For example, if the divided voltage of C1 is 3/4 of the battery voltage VBAT, the divided voltage of C2 is 1/4 of the battery voltage VBAT, and the voltage of the buck converter 1521 is 1.1V, the input voltage may be provided to the buck converter 1521 by using the divided voltage of C2 when the battery voltage VBAT is greater than or equal to 4.4V. At this time, when the battery voltage is large, the battery voltage VBAT may be reduced by 4 times by using C2, so that the voltages at the input end and the output end of the buck converter 1521 are both close to 1.1, and the voltage difference across the buck converter 1521 is reduced. And, when the battery voltage VBAT is less than 4.4V and greater than or equal to 1.467V, the battery voltage VBAT can be reduced by 4/3 times by using C1, and the voltage difference across the buck converter 1521 is reduced while the operation of the buck converter 1521 is ensured.

Illustratively, fig. 10C shows a logic schematic of an electrical energy processing scheme provided by an embodiment of the present application. As shown in (1) of fig. 10C, when the battery voltage VBAT of 4V is directly input to the buck converter 1521 (i.e., the input voltage of the buck converter 1521 is 4V), the buck converter 1521 needs to reduce the voltage from 4V to 1.2V, and then power the electric load with the output voltage of 1.2V. In this case, the voltage difference Δv11 (i.e. the difference between the input voltage and the output voltage) across the buck converter 1521 reaches 2.8V (i.e. 4V-1.2v=2.8v), and at this time, the voltage difference across the buck converter 1521 is larger, and the power transmission efficiency is lower.

And, through the first control stage D1-the second control stage D2, when the capacitance values of the first capacitor C1 and the second capacitor C2 are the same (i.e. the second switched capacitor circuit 151 is 2:1 stepped down), as shown in (2) in fig. 10C, the second switched capacitor circuit 151 may reduce the voltage from 4V to 2V, and then apply the 2V voltage to the input end of the buck converter 1521, at this time, the differential pressure Δv12 across the buck converter 1521 reaches 0.8V (i.e. 2V-1.2v=0.8v), and compared with the differential pressure Δv11, the differential pressure across the buck converter 1521 is greatly reduced, i.e. reduced from 2.8V to 0.8V, so as to improve the power conversion efficiency of the buck converter 1521, thereby improving the battery endurance of the terminal device.

In one embodiment, since the power load in the terminal device may require different supply voltages, such as 1.1V, 1.2V, 1.8V, etc., different voltages may be output by different voltage step-down devices accordingly. Fig. 11A is a schematic structural diagram of an exemplary electric energy storage module according to an embodiment of the present application. As shown in fig. 11A, the BUCK converter 1521 may include a first BUCK device (BUCK) 1521A, a second BUCK device (BUCK) 1521B, and a third BUCK device (BUCK) 1521C. Here, each of the first, second, and third buck devices 1521A, 1521B, and 1521C may be one buck chip, or a plurality of buck devices may be integrated in one buck chip, which is not limited. And, the first electric load 131 connected to the output terminal of the buck converter 1521 may include a first sub-load 131A, a second sub-load 131B, and a third sub-load 131C, wherein the power supply voltage of the first sub-load 131A is 1.1V, the power supply voltage of the second sub-load 131B is 1.2V, and the power supply voltage of the third sub-load 131C is 1.8V.

After the first voltage reducing device 1521A obtains the input voltage through the input terminal, it may reduce the voltage to obtain the output voltage of 1.1V, and provide the output voltage of 1.1V to the first sub-load 131A through the output terminal. After the second voltage reducing device 1521B obtains the input voltage through the input terminal, it may reduce the voltage to obtain an output voltage of 1.2V, and provide the output voltage of 1.2V to the second sub-load 131B through the output terminal. After the third voltage reducing device 1521C obtains the input voltage through the input terminal, it may reduce the voltage to obtain an output voltage of 1.8V, and provide the output voltage of 1.8V to the third sub-load 131C through the output terminal.

Alternatively, in the case where the buck converter 1521 includes a plurality of buck devices, the divided voltage of the first capacitor C1 or the divided voltage of the second capacitor C2 may be flexibly selected to provide the input voltage to the different buck devices. For example, if the divided voltage of the first capacitor C1 is the battery voltage VBAT of 3/4, the divided voltage of the second capacitor C2 is the battery voltage VBAT of 1/4, and the battery voltage is 4.5V, the divided voltage of the first capacitor C1 may be used to provide the input voltage to the second step-down device 1521B and the third step-down device 1521C, and the divided voltage of the first capacitor C2 may be used to provide the input voltage to the first step-down device 1521A.

Alternatively, in the case where the buck converter 1521 includes a plurality of buck devices, the second capacitance C2 may be determined according to the power consumption capability of the sub-load to which the plurality of buck devices are connected. For example, if the power consumption of the second sub-load 131B connected to the second voltage reduction device 1521B is the largest, the capacitance value of the second capacitor C2 may be determined according to the second voltage reduction device 1521B, so that the voltage divided by the second capacitor C2 may enable the second voltage reduction device 1521B to work normally, so that when the battery 120 supplies power to the sub-load with larger power consumption, the battery 120 may have a higher power conversion rate, thereby improving the power utilization rate of the battery 120 as a whole, and improving the battery endurance capability of the terminal device.

In another embodiment, different buck devices may be powered with different capacitances. Fig. 11B illustrates a schematic structural diagram of an exemplary electrical energy storage module according to an embodiment of the present application. As shown in fig. 11B, each voltage reduction device may be connected to the fifth switch S5 through one switch, for example, the first voltage reduction device 1521A may be connected to the fifth switch S5 through the seventh switch S7, the second voltage reduction device 1521B may be connected to the fifth switch S5 through the eighth switch S8, and the third voltage reduction device 1521C may be connected to the fifth switch S5 through the ninth switch S9.

And, the second capacitor C2 may be a first capacitor element C21, a second capacitor element C22, and a third capacitor element C23, wherein each capacitor element may correspond to one voltage-reducing device, and each capacitor element may be connected to the fifth switch through one switch. For example, the first capacitive element C21 may correspond to the first step-down device 1521A, the first capacitive element C21 being connected to the fifth switch S5 through the tenth switch S10; the second capacitive element C22 may correspond to the second step-down device 1521B, the second capacitive element C22 being connected to the fifth switch S5 through the eleventh switch S10; the third capacitive element C23 may correspond to the third step-down device 1521C, and the third capacitive element C23 is connected to the fifth switch S5 through the twelfth switch S12.

When the sub-load connected with any one of the voltage reduction devices is required to be powered, the switch connected with the voltage reduction device can be controlled to be turned on, and the switch connected with the capacitor element corresponding to the voltage reduction device can be controlled to be turned on. For example, if power is required to be supplied to the first sub-load 131A, in the first control stage D1, the tenth switch S10 may be further controlled to be turned on, so that the battery 120 may charge the first capacitor C1 and the first capacitor element C21. And, in the second control stage D2, the tenth switch S10 and the seventh switch S7 may also be controlled to be turned on to provide the input voltage to the first step-down device 1521A by using the divided voltage of the first capacitor C21. Through the mode, different input voltages can be provided for different voltage reduction devices, so that the electric energy transmission efficiency of each voltage reduction device can be accurately adjusted, and the battery endurance is further improved.

Alternatively, different input voltages may be provided to different buck devices by different capacitive elements in the capacitor C2, for example, the third capacitive device C23 is used to provide the input voltage to the third buck device 1521C, and the parallel structure of the third capacitive element C23 and the second capacitive element C22 provides the input voltage to the second buck device 1521B. It should be noted that, in the embodiments of the present application, different schemes may be adopted, so that different voltage reduction devices may provide the input voltage by the capacitance devices with different capacitance values, and the specific implementation manner is not limited.

In other embodiments, when the dc converter 152 includes a BOOST (BOOST) converter 1522 and the input voltage of the BOOST converter 1522 is low, the power processing circuit may provide the input voltage to the buck converter 1521 through two control stages, which will be described one by one.

In the third control stage D3, the battery 120 is a charging process of the first capacitor C1. Fig. 12A illustrates a control logic diagram of another exemplary power processing circuit provided in an embodiment of the present application. As shown in (1) of fig. 12A, at this stage, the second switch S2 and the fourth switch S4 may be controlled to be turned on, the first switch S1, the third switch S3, and the fifth switch S5 may be turned off, at this time, the current may be transmitted along a current transmission path shown by a dotted arrow in (1) of fig. 12A, an equivalent circuit may charge the first capacitor C1 as shown in (2) of fig. 12A by the battery 120, a differential pressure across the first capacitor C1 may be gradually increased, and after the voltage U1 across the first capacitor C1 reaches VBAT, the charging may be completed, and the fourth control stage D4 may be entered.

In the fourth control stage D4, the battery 120 and the first capacitor C1 provide the step-up converter 1522 with the input voltage. As shown in (1) of fig. 12B, at this stage, the first switch S1, the third switch S3, and the fifth switch S5 may be controlled to be turned on, the second switch S2, and the fourth switch S4 may be turned off, and at this time, current is transmitted along a current transmission path shown by a dotted arrow in (1) of fig. 12B, and at this time, an equivalent circuit is shown in (2) of fig. 12B, and the battery 120 and the first capacitor C1 are connected in series to provide an input voltage to the boost converter 1522, and at this time, the input voltage of the boost converter 1522 may be 2×vbat, and accordingly, the boost ratio of the second switched capacitor circuit 151 is 2. After the end of the present round of discharging, the third control stage C3 may be re-entered, and the battery 120 may re-enter the fourth control stage D4 after supplying the first capacitor C1 with power. In addition, it should be noted that, in the power transmission circuit corresponding to the boost converter 1522, the second capacitor C2 may perform filtering to improve the signal quality of the input voltage. Optionally, in order to reduce the circuit cost, the second capacitor C2 may not be included in the power transmission circuit corresponding to the boost converter 1522.

Illustratively, fig. 12C shows a logic schematic of another power treatment scheme provided by an embodiment of the present application. As shown in (1) of fig. 12C, when the battery voltage VBAT of 4V is directly input to the boost converter 1522 (i.e., the input voltage of the boost converter 1522 is 4V), the boost converter 1522 increases the voltage from 4V to 9V, and then supplies the electric load with the output voltage of 9V. In this case, the voltage difference Δv21 across the boost converter 1522 reaches 5V (i.e., 9V-4 v=5v), at which time the voltage difference across the boost converter 1522 is larger, and the power transmission efficiency is lower.

And, in the embodiment of the present application, through the third control stage D3 and the fourth control stage D4, in the case that the front end of the boost converter 1522 is provided with the Switched Capacitor (SC) circuit, the switched capacitor circuit may boost the 4V voltage to 8V and then apply the 8V voltage to the input end of the boost converter 1522, at this time, the differential pressure Δv22 across the boost converter 1522 reaches 1V (i.e. 9V-8 v=1v), and compared with the differential pressure Δv21, the differential pressure across the boost circuit is reduced from 5V to 1V, thereby improving the power conversion efficiency of the boost converter 1522 and improving the battery endurance of the terminal device.

Illustratively, the boost converter 1522 may include a plurality of boost devices to provide different supply voltages to the second electrical load 132. The specific structure of the buck converter 1521 is similar to the circuit structure including a plurality of buck devices described above in conjunction with fig. 11A-11B, and reference may be made to the related description of the above portions of the embodiments of the present application, which is not repeated herein.

In still other embodiments, in the case where the battery voltage VBAT is 3-3.5 v, since the partial power load (hereinafter referred to as the first power load 131) needs to use a power supply voltage of 1.1 v-1.8 v (i.e. needs to step down the battery voltage VBAT), the partial power load (hereinafter referred to as the second power load 132) needs to use a power supply voltage of 8-9 v (i.e. needs to step up the battery voltage VBAT), the dc converter 152 may include a buck converter 1521 and a boost converter 1522. After the buck converter 1521 steps down the battery voltage VBAT, the first electrical load 131 is powered by the stepped-down voltage, and after the boost converter 1521 steps up the battery voltage VBAT, the second electrical load 132 is powered by the stepped-up voltage.

In one example, when the number of switched capacitor circuits in the second Switched Capacitor (SC) circuit 151 is 1, the circuit configuration of the electric energy storage module is as shown in fig. 13. Specifically, fig. 13 shows a schematic structural diagram of an exemplary power processing circuit provided in an embodiment of the present application, and referring to fig. 13, the power processing circuit 150 may further include a thirteenth switch S13 and a fourteenth switch S14. The thirteenth switch S13 is disposed between the second connection terminal of the fifth switch S5 and the buck converter 1521, and can control the thirteenth switch S13 to be turned on when the input voltage needs to be provided to the buck converter 1521. And, the fourteenth switch S14 is disposed between the fifth switch S5 and the boost converter 1522, and can control the fourteenth switch S14 to be turned on when the input voltage needs to be provided to the boost converter 1521.

In another example, when the number of switched capacitor circuits in the second switched capacitor circuit 151 is a plurality (2 or 3), the circuit configuration of the power storage module may be as shown in fig. 14, taking an example that the terminal device includes 2 switched capacitor circuits. Specifically, fig. 14 shows a schematic structural diagram of another exemplary power processing circuit provided in an embodiment of the present application, and referring to fig. 14, the power processing circuit may further include a third switched capacitor circuit 153. And, the power processing circuit 150 may further include a fifteenth switch S15, a sixteenth switch S16, and a third capacitor C3. The second switched capacitor circuit 151 may be connected to the buck converter 1521 through a fifth switch S5, and the third switched capacitor circuit 153 may be connected to the boost converter 1522 through a fifteenth switch S15. The second connection terminal of the fifteenth switch S15 may also be connected to a third reference potential terminal (for example, the ground GND3 in fig. 14, it should be noted that the third reference potential terminal and the other reference potential terminals may be the same potential terminal or different potential terminals, which is not limited in particular). A first connection terminal of the sixteenth switch S160 is for obtaining the system voltage VPH or the battery voltage VBAT, and a second connection terminal of the sixteenth switch S16 is for connecting to the boost converter 1522. It should be noted that the third switched capacitor circuit 153 is similar to the second switched capacitor circuit 151, the fifteenth switch S15 is similar to the fifth switch S5, the sixteenth switch S16 is similar to the sixth switch S6, and the third capacitor C3 is similar to the second capacitor C2, which will be referred to the related description of the above portions of the embodiments of the present application and will not be repeated.

It should be noted that, for other contents of the buck converter 1521 and the boost converter 1522 in the embodiments of the present application, reference may be made to the related descriptions of the above portions of the embodiments of the present application, which are not repeated herein.

Having described the power processing circuit by the above-described embodiment, the description of the analog-to-digital converter 160 is continued next.

The analog-to-digital converter 160 includes a positive input terminal vin+ and a negative input terminal Vin-, wherein the positive input terminal vin+ is connected with the positive electrode of the battery 120, and the negative input terminal Vin-is connected with the negative electrode of the battery 120, so that the battery voltage VBAT (i.e. the differential pressure across the battery 120) can be collected by the analog-to-digital converter 160, and after the collected battery voltage VBAT is subjected to analog-to-digital conversion, the battery voltage VBAT in a digital signal format is transmitted to the system chip 170. The adc 160 may be implemented as an adc chip or other detecting device with digital-to-analog conversion, for example, without limitation. And, it should be further noted that, in the embodiments of the present application, a circuit, an element, or a functional module having a voltage acquisition function other than an analog-digital converter may be used, which is not particularly limited.

The system chip 170, which may be implemented as a control chip. For example, fig. 15 shows a schematic structural diagram of a system chip provided in the embodiment of the present application, as shown in fig. 15, the system chip 170 includes a first pin P1, a second pin P2, a third pin P3, and a fourth pin P4 (hereinafter, simply referred to as a first pin P1-a fourth pin P4), where the first pin P1 is connected to the analog-to-digital converter 160, the second pin P2 is connected to the SC chip A1, the third pin P3 is connected to the fifth switch S5, and the fourth pin P4 is connected to the sixth switch S6. Illustratively, the third pin P3 and the fourth pin P4 may be connected to a control terminal of the switch through a gate controller.

It should be noted that, when the electric energy processing circuit 150 includes other devices to be controlled, the electric energy processing circuit 150 may also be connected to other devices to be controlled through other pins, for example, when the electric energy processing circuit 150 further includes one or more of the seventh switch S7-sixteenth switch S16, or other switches, the electric energy processing circuit 150 may also be connected to the other switches through other pins, which will not be described herein. And, when the power processing circuit further includes other SC chips, for example, an SC chip including the third switched capacitor circuit 153, the power processing circuit may also be connected to the other SC chips through other pins, which is not limited in particular. Illustratively, the first pin P1-the fourth pin P4 may be a general purpose input Output Port (GPIO). It should be noted that the pins may be other pins capable of performing device connection, which is not particularly limited. The pins may be connected to each device by an integrated circuit (inter-integrated circuit, I2C) bus, or may be connected to each device by other buses, for example, without limitation.

In this embodiment of the present application, the system chip 170 may be used to control on or off of each switch in the electrical energy processing circuit 150, so as to control an electrical energy transmission process of the battery 120, such as control a charging process of the battery 120, and control a power supply process of the battery 120 to the electrical load 130.

In some embodiments, the system chip 170 may control the on or off of the charge control switch S0 according to the state of charge. Specifically, the system chip 170 may control the charge control switch S0 to be turned on when detecting that the terminal device is connected to the charger, and control the charge control switch S0 to be turned off when detecting that the terminal device is not connected to the charger.

For example, in a case where the level of the real-time voltage of the charging interface 110 may be used to characterize whether the terminal device is connected to the charger, the system chip 170 may control the charging control switch S0 to be turned on if the real-time voltage of the charging interface 110 is greater than or equal to a preset voltage threshold. And controlling the charge control switch S0 to be turned off in the case that the real-time voltage of the charge interface 110 is less than the preset voltage threshold. The preset voltage threshold may be set to a value smaller than the charging voltage VBUS, for example, 2V according to practical situations and specific situations, which is not limited. With this embodiment, the charging control switch S0 may be controlled to be turned on when the terminal device is connected to the charger, so that the charger can normally charge the battery 120. And, the charging control switch S0 can be controlled to be turned off under the condition that the terminal device is not connected to the charger, so that the electric energy waste caused by the flow of the current to the charging interface 110 is avoided, and the electric energy utilization rate is improved. It should be noted that, with continued reference to fig. 15, in a case where the second switched capacitor circuit 151 (including the charge control switch S0) is a circuit of the SC chip A1, and the SC chip A1 further includes the switched capacitor controller a11, the system chip 170 may send a charge control signal to the switched capacitor controller a11, and the switched capacitor controller a11 controls on or off of the charge control switch S0 in response to the charge control signal. In addition, in the case where the charge control switch S0 is provided outside the SC chip A1, the charge control switch S0 may be directly controlled by the system chip 170, which is not particularly limited.

In some embodiments, the system chip 170 may control the on or off of the sixth switch S6. Specifically, when it is necessary to provide the input voltage to the dc converter 152 using the conventional power consumption mode, the sixth switch S6 may be controlled to be turned on to provide the system voltage VPH or the battery voltage VBAT as the input voltage of the dc converter 152. And, when the power consumption mode provided in the embodiment of the present application is needed to provide the input voltage obtained by equal-proportion voltage reduction or equal-proportion voltage increase of the second switched capacitor circuit 151 for the dc converter 152, the sixth switch S6 may be controlled to be turned off.

In one embodiment, the sixth switch S6 may be controlled to be turned on in the charging mode. For example, the sixth switch S6 may be controlled to be turned on when the real-time voltage of the charging interface 110 is greater than or equal to the preset voltage threshold, that is, when the terminal device is connected to the charger. So that the normal power supply to the power load 130 through the dc converter 152 can be ensured while the battery 120 is rapidly charged by the second switched capacitor circuit 151.

In another embodiment, the sixth switch S6 may be controlled to be turned on when the input voltage obtained by the equal-scale voltage reduction or equal-scale voltage increase of the second switched capacitor circuit 151 cannot ensure the normal operation of the dc converter 152.

In a specific embodiment, in the case where the dc converter 152 includes a buck converter 1521 and the battery voltage VBAT is less than the first voltage threshold, the sixth switch S6 may be controlled to be turned on.

The first voltage threshold may be a threshold voltage value of whether the second switched capacitor circuit 151 is capable of reducing voltage according to a fixed ratio. Specifically, the first voltage threshold is determined according to a step-down ratio of the second switched capacitor circuit 151, and a minimum input voltage of the step-down converter 1521, wherein the minimum input voltage may be a minimum value among input voltages capable of enabling the step-down converter 1521 to operate normally, and the minimum input voltage is greater than or equal to the fixed output voltage. And, since the minimum input voltage may be determined according to the fixed output voltage of the buck converter 1521 and the minimum voltage difference, for example, the difference between the minimum input voltage and the fixed output voltage is equal to the minimum voltage difference. Accordingly, the first voltage threshold may also be determined according to the output voltage of the buck converter 1521, a minimum voltage difference of the buck converter 1521, and a buck ratio of the second switched capacitor circuit 151, where the minimum voltage difference may be a minimum voltage difference that needs to be satisfied by the input terminal and the output terminal of the buck converter 1521 when the buck converter 1521 is operating normally.

Illustratively, the product of the first voltage threshold and the buck ratio is greater than or equal to the minimum input voltage of buck converter 1521. For example, continuing with fig. 10C as an example, if the output voltage is 1.2V, the minimum input voltage is 1.5V, and the step-down ratio is 1/2, the first voltage threshold may be greater than or equal to 3V.

As another example, when the buck converter 1521 includes a plurality of buck devices, each corresponding to one output voltage, the product of the first voltage threshold and the buck ratio is greater than or equal to the maximum value of the minimum input voltages of the plurality of buck devices to ensure that the plurality of buck devices can all operate normally. For example, with continued reference to fig. 11A, the buck converter 1521 includes a first buck device 1521A, a second buck device 1521B, and a third buck device 1521C, and in the case where the minimum input voltages of the first buck device 1521A to the third buck device 1521C are 1.4V, 1.5V, and 2.1V, respectively, the maximum value of the minimum input voltages of the 3 buck devices is 2.1V, and if the buck ratio of the second switched capacitor circuit 151 is 1/2, the first voltage threshold may be greater than or equal to 4.2V. It should be noted that, in this example and the subsequent examples, the first voltage threshold may also be determined according to the step-down ratio of the second switched capacitor circuit 151, the output voltage of each step-down device, and the minimum voltage difference of the step-down converter 1521, and the specific calculation manner may be referred to the related description of the previous example, which is not repeated herein.

Still another example, when the BUCK converter 1521 includes a plurality of BUCK devices, the first voltage threshold may be determined based on the BUCK ratio of the second switched capacitor circuit 151, the minimum input voltage of the BUCK device that is operating, for example, if only the second BUCK device (BUCK) 1521B is currently supplying power to the load, the minimum input voltage may be 1.5V, and if the BUCK ratio is 1/2, the first voltage threshold may be greater than or equal to 3V.

Still further exemplary, when the buck converter 1521 includes a plurality of buck devices, the first voltage threshold may be determined according to the power consumption of the sub-load to which the plurality of buck devices are connected, for example, if the power consumption of the second buck device 1521B is maximum, the minimum input voltage is 1.5V, and if the buck ratio of the second switched capacitor circuit 151 is 1/2, the first voltage threshold may be greater than or equal to 3V. Alternatively, in order to ensure the normal operation of the first step-down device 1521A, the switch S6 may be controlled to be turned on in a conventional power-on manner to take the battery voltage VBAT or the system voltage VPH as the input voltage of the first step-down device 1521A.

Still another example, when the buck converter 1521 includes a plurality of buck devices, the product of the first voltage threshold and the buck ratio is greater than or equal to a minimum value of the minimum input voltages of the plurality of buck devices. Illustratively, taking the step-down ratio of the second switched capacitor circuit 151 as 1/2, the minimum input voltages of the first step-down device 1521A-the third step-down device 1521C are 1.4V, 1.5V, and 2.1V, respectively, for example, if the battery voltage VBAT is greater than or equal to 4.2V, the output voltage of the second switched capacitor circuit 151 after being stepped down may be taken as the input voltage of the first step-down device 1521A-the third step-down device 1521C; if the battery voltage VBAT is less than 4.2V and greater than or equal to 3V (at this time, the third step-down device 1521C cannot work normally with the voltage after the step-down), the output voltage after the step-down of the second switched capacitor circuit 151 may be used as the input voltage of the first step-down device 1521A and the second step-down device 1521B; if the battery voltage VBAT is less than 3V and greater than or equal to 2.8V (at this time, the second step-down device 1521B and the third step-down device 1521C cannot operate normally with the step-down voltage), the output voltage of the second switched capacitor circuit 151 after the step-down can be used as the input voltage of the first step-down device 1521A. Alternatively, for a step-down device that cannot normally operate with the step-down voltage, the battery voltage VBAT or the system voltage VPH may be used as the input voltage.

It should be noted that the first voltage threshold may also be set according to other manners, such as setting to an empirical value, etc., which is not particularly limited.

In another specific embodiment, in the case where the dc converter 152 includes the boost converter 1522 and the battery voltage VBAT is greater than or equal to the second voltage threshold, the sixth switch S6 may be controlled to be turned on.

The second voltage threshold may be a threshold voltage value of whether the second switched capacitor circuit 151 is capable of boosting according to a fixed ratio. Specifically, the second voltage threshold may be determined according to the boost ratio of the second switched capacitor circuit 151, the maximum input voltage of the boost converter 1522. The maximum input voltage may be the maximum value of input voltages that enable the boost converter 1522 to operate normally, and the maximum input voltage is smaller than the fixed output voltage. And, since the maximum input voltage may be determined according to the fixed output voltage and the minimum voltage difference of the boost converter 1522, for example, the difference between the fixed output voltage and the maximum input voltage is equal to the minimum voltage difference. Accordingly, the second voltage threshold may also be determined according to the output voltage of the buck converter 1521, the minimum voltage difference of the buck converter 1521, the buck ratio of the second switched capacitor circuit 151. The minimum voltage difference may be the minimum voltage difference that needs to be satisfied between the output and the input of the boost converter 1522 when the boost converter 1522 is operating normally.

As another example, when the boost converter 1522 includes a plurality of boost devices, and each boost device corresponds to one output voltage, the product of the second voltage threshold and the boost ratio is less than or equal to the minimum value of the maximum input voltages of the plurality of boost devices, so as to ensure that the plurality of boost devices can all operate normally.

Still another example, when the boost converter 1522 includes a plurality of boost devices, the second voltage threshold may be determined based on the boost ratio of the second switched capacitor circuit 151, the maximum input voltage of the operating buck device.

Still further exemplary, when the boost converter 1522 includes a plurality of boost devices, the second voltage threshold may be determined according to the power consumption of the plurality of boost devices connected to the sub-load.

Still another example, when the boost converter 1522 includes a plurality of boost devices, the product of the second voltage threshold and the boost ratio is less than or equal to the maximum value of the maximum input voltages of the plurality of boost devices to boost the input voltage of at least part of the boost devices that can operate, and for part of the boost devices that cannot operate normally, the battery voltage VBAT or the system voltage VPH can be taken as the input voltage of the boost device by turning on the sixth switch S6.

It should be noted that the second voltage threshold may also be set according to other manners, such as setting to an empirical value, etc., which is not particularly limited. It should be noted that, the above specific implementation manner of determining the second voltage threshold is similar to the example of determining the first voltage threshold, and reference may be made to the related description of the above portion of the embodiment of the present application, which is not repeated.

In some embodiments, the system chip 170 may control the on or off of the first switch S1-fourth switch S4 and the fifth switch S5 in the second switched capacitor circuit 151 at different control stages of the power processing. Next, a specific control procedure of the system chip 170 will be described in terms of a control stage.

In some embodiments, where the dc converter 152 includes a buck converter 1521 and the battery voltage VBAT is greater than or equal to the first voltage threshold, the system-on-chip 170 may periodically on-off control the first switch S1-the fifth switch S5. Specifically, fig. 16 shows an exemplary control logic diagram provided in the embodiment of the present application, as shown in fig. 16, in each cycle, the control may be performed according to the first control stage D1 to charge the second capacitor C2, and then the control may be performed according to the control logic of the second control stage D2 to provide the input voltage to the buck converter 1521 with the second capacitor C2. For example, in each cycle, the ratio of the duration T1 of the first control phase D1 to the duration (t1+t2) of the whole cycle may be 90%. Note that, the system chip 170 may also perform control according to the control logic of the first control stage D1 and the second control stage D2 when the second switched capacitor circuit 151 is used to provide the input voltage of the buck converter 1521 with an equal ratio, which is not particularly limited.

In the first control stage D1, the system chip 170 may control the first switch S1, the third switch S3, and the fifth switch S5 to be turned on, and control the second switch S2 and the fourth switch S4 to be turned off.

In the second control phase D2, the system chip 170 may control the fifth switch S5 to be turned off.

In one embodiment, in the case where the second switched capacitor circuit 151 belongs to the SC chip A1, the system chip 170 may send a step-down control signal to the switched capacitor controller a11, so that the switched capacitor controller a11 controls the first switch S1 to the fourth switch S4, so that the power processing circuit A1 can reduce the battery voltage VBAT according to a fixed ratio.

Illustratively, with continued reference to fig. 10A, the switched capacitor controller a11 may control the first switch S1, the third switch S3 to be on, and the second switch S2 and the fourth switch S4 to be off during the first control phase D1 in response to the buck control signal; and in the second control stage D2, the first switch S1 to the fourth switch S4 may be controlled to keep unchanged according to the on-off state of the first control stage D1 (or the first switch S1 to the fourth switch S4 may be controlled to be all turned off). In one example, the system chip 170 may transmit a control signal to the switched capacitor controller a11 at the start of control and the end of control. Specifically, the system chip 170 may send a step-down start signal to the switched capacitor controller a11 when the battery voltage VBAT meets a preset step-down condition, so that the switched capacitor controller a11 periodically controls the first switch S1 to the fourth switch S4 according to the control logic of the first control stage D1 and the second control stage D2, and if the equal-ratio step-down of the second switched capacitor circuit 151 needs to be ended, the system chip 170 sends a step-down end signal to the switched capacitor controller a11, so that the switched capacitor controller a11 does not continue to control the first switch S1 to the fourth switch S4 according to the control logic of the first control stage D1 and the second control stage D2 (may stop controlling the first switch S1 to the fourth switch S4 or continue controlling the first switch S1 to the fourth switch S4 according to another control logic). In another example, the system chip 170 may transmit a control signal to the switched capacitor controller a11 at each control stage to alternately perform the switching control of the first control stage D1 and the second control stage D2. Specifically, the system chip 170 may send a first control signal to the switched capacitor controller a11 each time the first control phase D1 needs to be entered, so that the switched capacitor controller a11 controls the first switch S1 to the fourth switch S4 according to the control logic of the first control phase D1 in response to the first control signal. And, when the second control phase D2 needs to be entered, the system chip 170 sends a second control signal to the switched capacitor controller a11, so that the switched capacitor controller a11 responds to the second control signal to control the first switch S1 to the fourth switch S4 according to the control logic of the second control phase D2.

In one embodiment, the second switched capacitor circuit 151 may send a first pulse signal to the control terminal of the fifth switch S5 through the third pin P3, where the waveform of the first pulse signal may refer to fig. 16, and in the first control stage D1, the first pulse signal is in a first level state (such as a high level state) to control the fifth switch S5 to be turned on; and in the second control stage D2, the first pulse signal is in a second level state (such as a low level state) to control the fifth switch S5 to be turned off. Illustratively, the duty cycle of the first pulse signal may be 90%. Alternatively, the duty cycle of the first pulse signal may be adjusted according to the second capacitor C2, for example, if the duty cycle of the first pulse signal is 80%, the duty cycle of the first pulse signal may be increased to 90% (other ratios may be 85%, for example) when the power of the second capacitor C2 is insufficient to provide the stable input voltage to the buck converter 1521 (for example, the voltage of the second capacitor C2 may drop by 10% in the second control stage D2), it may be determined that the second capacitor C2 cannot provide the stable output voltage when the drop exceeds other amplitude values, which is not particularly limited).

In other embodiments, where the dc converter 152 includes a boost converter 1522 and the battery voltage VBAT is less than or equal to the second voltage threshold, the system-on-chip 170 may periodically control the first switch S1-the fifth switch S5 to be turned on and off. For example, in each cycle, the third control stage D3 may be used to charge the first capacitor C1, and then the fourth control stage D4 may be used to control the control logic to provide the input voltage to the boost converter 1522 using the battery 120 and the second capacitor C2 in series.

In the third control stage D3, the system chip 170 may control the second switch S2 and the fourth switch S4 to be turned on, and the first switch S1, the third switch S3, and the fifth switch S5 to be turned off.

In the fourth control stage D4, the system chip 170 may control the first switch S1, the third switch S3, and the fifth switch S5 to be turned on, and the second switch S2 and the fourth switch S4 to be turned off.

Illustratively, the system chip 170 may send a control signal to the switched-capacitor controller a11 to cause the switched-capacitor controller a11 to control the first switch S1-fourth switch S4 according to the control logic of the third control stage D3 and the fourth control stage D4. The specific control manner may refer to the control of the system chip 170 on the SC control a11 in the first control stage D1 and the second control stage D2, which is not described herein.

The system chip 170 may send a second pulse signal to the control terminal of the fifth switch S5 through the third pin P3 to control on or off of the fifth switch S5 by using the second pulse signal. In the third control stage D3, the second pulse signal is in a second level state (such as a low level state) to control the fifth switch S5 to be turned off; and in the fourth control stage D4, the second pulse signal is in the first level state (such as the high level state) to control the fifth switch S5 to be turned on. The duty ratio of the second pulse signal may be provided according to the first capacitor C1, for example, when the first capacitor C1 cannot provide the stable voltage, the duty ratio of the second pulse signal is increased. It should be noted that, for other contents of the second pulse signal, reference may be made to the related description of the first pulse signal in the above-mentioned portion of the embodiment of the present application, which is not repeated.

Optionally, referring to the power processing circuit shown in fig. 11B, the system chip 170 may further control the seventh switch S7 to the twelfth switch S12. When power is required to be supplied to the first sub-load 131A, the system chip 170 may control the tenth switch S10 to be turned on in the first control stage D1, and may also control the seventh switch S7 and the tenth switch S10 to be turned on in the second control stage D2. Similarly, the system-on-chip 170 may also control the eighth switch S8 and the eleventh switch S11 when it is desired to power the second sub-load 131B. The system chip 170 may also control the ninth switch 9 and the twelfth switch S12 when it is necessary to supply power to the third sub-load 131C. It should be noted that, the control manners of the eighth switch S8 and the eleventh switch S11, the ninth switch 9 and the twelfth switch S12 may be referred to the above description of the control manners of the seventh switch S7 and the tenth switch S10, and will not be repeated.

Optionally, with continued reference to the power processing circuit shown in fig. 13, the system chip 170 may also control the thirteenth switch S13 to be turned on and the fourteenth switch S14 to be turned off when it is required to provide the input voltage to the buck converter 1521; and, when it is necessary to provide the input voltage to the boost converter 1521, the fourteenth switch S14 may be controlled to be turned on and the thirteenth switch S13 may be controlled to be turned off.

Optionally, with continued reference to the power processing circuit shown in fig. 14, the system chip 170 may further control the third switched capacitor circuit 153 in a manner described in the above-mentioned section of the embodiment of the present application with reference to the second switched capacitor circuit 151. The system chip 170 may also control the fifteenth switch S15, and the control manner may be referred to in the description of the fifth switch S5 in the foregoing part of the embodiment of the present application. The system chip 170 may also control the sixteenth switch S16, and the control manner may be referred to in the description of the sixth switch S6 in the foregoing part of the embodiment of the present application.

It should be noted that, since the power conversion efficiency of the dc converter such as the boost converter and the buck converter is generally about 80%, the power conversion efficiency of the switched capacitor module is generally about 96% -98%. Because the electric energy conversion efficiency of the direct current converter is improved along with the increase of the differential pressure at two ends of the direct current converter, in the circuit provided by the embodiment of the application, by arranging the switch capacitor module in front of the direct current converter, through boosting the input voltage of the boost converter and reducing the input voltage of the buck converter, the differential pressure at two ends of the direct current converter such as the boost converter and the buck converter can be reduced, the electric energy conversion efficiency of the direct current converter is improved, the electric energy conversion efficiency of the electric energy processing circuit can reach more than 85%, and when the battery supplies power to the electric load through the electric energy processing circuit, the utilization rate of the battery electric energy can be improved, and the battery endurance of the terminal equipment is improved.

In addition, another power processing circuit is further provided in the embodiment of the present application, and fig. 17 shows a schematic structural diagram of another terminal device provided in the embodiment of the present application. As can be seen from comparing fig. 8 and 17, the terminal device 100 further comprises a fourth switching capacitance circuit 154.

One end of the fourth switching capacitance circuit 154 is connected to the charging interface 110, and the other end of the fourth switching capacitance circuit 154 is connected to one end of the battery 120. The fourth switching capacitor circuit 154 is disposed on the battery charging circuit, and after the charging voltage VBUS is obtained through the charging interface 110, the fourth switching capacitor circuit 154 performs a step-down process according to a preset step-down ratio, and then uses the step-down voltage to perform a fast charge for the battery 120.

It should be noted that, for details of the second switched capacitor circuit 151, reference may be made to the related descriptions of any one of the embodiments of fig. 8 to 16 in the above embodiments of the present application, and the details are not repeated.

By the embodiment, the fourth switched capacitor circuit 154 can be utilized for quick charging, and the second switched capacitor circuit 151 can be utilized for power supply, so that the independence of the quick charging process and the power supply process is improved, and the mutual influence is avoided.

In addition, another power processing circuit is provided in the embodiment of the present application, and fig. 18 shows a schematic structural diagram of still another terminal device provided in the embodiment of the present application. As can be seen from comparing fig. 8 and 18, the terminal device 100 further includes a buck converter 155, a fifth switched capacitor circuit 156, a seventeenth switch S17, and a fourth capacitor C4.

One end of the buck converter 155 is connected to the charging interface 110, the other end of the buck converter 155 is connected to one end of the fifth switched capacitor circuit 156 through the seventeenth switch S17, and the other end of the buck converter 155 is also connected to a fourth reference potential end (such as ground GND4 in fig. 18) through a fourth capacitor. The other end of the fifth switched capacitor circuit 156 is connected to one end of the battery 120. The buck converter 155 may refer to the relevant description of the buck converter 144 in the above-mentioned portions of the embodiments of the present application, and will not be repeated here. And, the fifth switched capacitor circuit 156 may refer to the related description of the second switched capacitor circuit 152 in the above-mentioned portion of the embodiment of the present application, the specific content of the seventeenth switch S17 may refer to the related description of the S5 in the above-mentioned portion of the embodiment of the present application, and the fourth capacitor C4 may refer to the related description of the second capacitor C2 in the above-mentioned portion of the embodiment of the present application, which is not repeated here.

In the reverse charging stage, through the control of the seventeenth switch S17 and the fifth switched capacitor circuit 156 (for specific control logic, refer to the description of the third control stage D3 and the fourth control stage D4 in the above-mentioned part of the embodiment of the present application, which will not be repeated here), after the battery voltage VBAT is boosted in equal proportion (for example, 2×vbat), the voltage at the other end of the buck converter 155 may be adjusted to 2VBAT, thereby reducing the voltage difference across the buck converter 155, improving the power conversion efficiency of the buck converter 155, thereby improving the power utilization of the battery and improving the endurance capability of the battery.

And, based on the same inventive concept, the embodiment of the present application further provides a power processing method, which is applied to the power processing module shown in any embodiment of the embodiments of the present application in conjunction with fig. 8 to 17.

Fig. 19 shows a flow chart of an electrical energy processing method according to an embodiment of the present application, and as shown in fig. 19, the electrical energy processing method may include the following steps S11-S17.

S11, the system chip 170 acquires the charging voltage VBUS. The charging voltage VBUS may be acquired from the charging interface 110 in real time by an analog-to-digital converter.

S12, the system chip 170 determines whether the charging voltage VBUS is smaller than a preset voltage threshold Vc. If the determination result is yes, that is, the charging voltage VBUS is less than the preset voltage threshold Vc, step S13 is skipped, and if the determination result is no, that is, the charging voltage VBUS is greater than or equal to the preset voltage threshold Vc, step S17 is skipped.

The preset voltage threshold Vc may be referred to the above related description of the embodiments of the present application, and will not be described herein.

S13, in the case where the charging voltage VBUS is greater than or equal to the preset voltage threshold Vc, the system chip 170 obtains the battery voltage VBAT. The battery voltage VBAT may be acquired from the battery 120 in real time by the analog-to-digital converter 160.

S14, the system chip 170 determines whether the battery voltage VBAT is greater than or equal to the first voltage threshold Va. If the determination result is yes, that is, the battery voltage VBAT is greater than or equal to the first voltage threshold Va, step S15 is skipped. And, if the determination result is no, that is, if the battery voltage VBAT is smaller than the first voltage threshold Va, step S17 is skipped.

The first voltage threshold Va may be referred to the related description of the above portion of the embodiments of the present application, which is not repeated herein.

S15, the system chip 170 transmits a step-down control signal to the switched capacitor controller a 11.

S16, the switch capacitor controller A11 responds to the step-down control signal to periodically control the first switch S1 to the fourth switch S4 according to the control logic of the first control stage D1 and the second control stage D2. And, the system chip 170 periodically controls the fifth switch S5 according to the control logic of the first control stage D1 and the second control stage D2.

In the first control stage D1, as shown in steps S161-S165, the switched capacitor controller a11 controls the first switch S1, the third switch S3 to be turned on, and controls the second switch S2 and the fourth switch S4 to be turned off, and the system chip 170 may control the fifth switch S5 to be turned on to charge the first capacitor C1 and the second capacitor C2 by using the battery 120. And entering a second control phase D2 after the end of the charging. For details, reference may be made to the above description of the embodiment of the present application in conjunction with fig. 10A, which is not repeated here.

In the second control stage D2, in step S166, the system chip 170 may control the fifth switch S5 to be turned off to provide the input voltage to the buck converter 1521 by using the divided voltage vbat×c2/(c1+c2) of the second capacitor C2. And, after the end of the discharge, reentering the first control phase D1. For details, reference may be made to the above description of the embodiment of the present application in conjunction with fig. 10B, which is not repeated here.

In some embodiments, in a case where a control switch is disposed at one end of the second capacitor C2, in the second control stage D2, the Switch Capacitor (SC) controller a11 may control the first switch S1 and the fourth switch S4 to be turned on, the second switch S2, the third switch S3 and the control switch to be turned off, and the system chip 170 may control the fifth switch S5 to be turned on, so as to provide the input voltage to the buck converter 1521 with the divided voltage VBAT 1/(c1+c2) of the first capacitor C1. In one example, for the circuit shown in fig. 11A, if the divided voltage of the second capacitor C1 is the battery voltage VBAT of 3/4, the divided voltage of the second capacitor C2 is the battery voltage VBAT of 1/4, and S16 includes: in the second control stage D2, the input voltage may be supplied to the second voltage reduction device 1521B and the third voltage reduction device 1521C using the divided voltage of C1 or the input voltage may be supplied to the first voltage reduction device 1521A using the divided voltage of C2. For details, reference may be made to the related description of fig. 11A in the foregoing parts of the embodiments of the present application, and the details are not repeated here. Still another example, for the same buck converter 1521, the first capacitor C1 may be utilized to provide the input voltage to the buck converter 1521 in the case where the battery voltage VBAT is greater than or equal to the first voltage threshold and less than or equal to the third voltage threshold Vc. And, in case the battery voltage VBAT is greater than the third voltage threshold, providing the input voltage to the buck converter 1521 using the second capacitor C2.

In some embodiments, for the circuit shown in fig. 11B, in the first control stage D1 and the second control stage D2, when power is required to be supplied to the sub-load connected to any one of the buck power supplies, the system chip 170 may control the switch connected to the buck connection to be turned on, and control the switch connected to the capacitive element corresponding to the buck to be turned on. For details, reference may be made to the above description of the embodiment of the present application in conjunction with fig. 11B, which is not repeated here.

S17, in the case where the charging voltage VBUS is greater than or equal to the preset voltage threshold Vc, or in the case where the battery voltage VBAT is greater than or equal to the first voltage threshold Va, the system chip 170 controls the sixth switch S6 to be turned on. Optionally, to ensure power supply performance, the system chip 170 may also control the fifth switch S5 to be turned off.

And, based on the same inventive concept, the embodiments of the present application also provide another power processing method, which is applied to the power processing module shown in any of the embodiments of the present application with reference to fig. 8 to 17.

Fig. 20 shows a flowchart of another power processing method according to an embodiment of the present application, where, as shown in fig. 20, the power processing method may include the following steps S11-S17.

S21, the system chip 170 acquires the charging voltage VBUS. The charging voltage VBUS may be acquired from the charging interface 110 in real time by an analog-to-digital converter.

S22, the system chip 170 determines whether the charging voltage VBUS is smaller than a preset voltage threshold Vc. If the determination result is yes, that is, the charging voltage VBUS is less than the preset voltage threshold Vc, step S23 is skipped, and if the determination result is no, that is, the charging voltage VBUS is greater than or equal to the preset voltage threshold Vc, step S27 is skipped.

S23, in the case where the charging voltage VBUS is greater than or equal to the preset voltage threshold Vc, the system chip 170 obtains the battery voltage VBAT. The battery voltage VBAT may be acquired from the battery 120 in real time by the analog-to-digital converter 160.

S24, the system chip 170 determines whether the battery voltage VBAT is less than or equal to the second voltage threshold Vb. If the determination result is yes, that is, the battery voltage VBAT is less than or equal to the second voltage threshold Vb, step S25 is skipped. And, in the case that the determination result is no, that is, the battery voltage VBAT is greater than the second voltage threshold Vb, step S27 is skipped.

The second voltage threshold Vb may be referred to the related description of the above portion of the embodiments of the present application, and will not be described herein.

S25, the system chip 170 transmits a boost control signal to the switched capacitor controller a 11.

S26, the switch capacitor controller A11 responds to the boost control signal and controls the first switch S1 to the fourth switch S4 according to the control logic of the third control stage D3 and the fourth control stage D4 periodically. And, the system chip 170 periodically controls the fifth switch S5 according to the control logic of the third control stage D3 and the fourth control stage D4.

In the third control stage D3, as shown in steps S261-S264, the switched capacitor controller a11 controls the first switch S1, the third switch S3 to be turned off, and controls the second switch S2 and the fourth switch S4 to be turned on. And, as shown in step S265A, the system chip 170 may control the fifth switch S5 to be turned off to charge the first capacitor C with the battery 120. And, entering a fourth control phase D4 after the end of the charging. For details, reference may be made to the above description of the embodiment of the present application in conjunction with fig. 12A, which is not repeated here.

In the fourth control phase D4, the first switch S1, the third switch S3 are turned on and the second switch S2 and the fourth switch S4 are controlled to be turned off as shown in steps S266-S269. And, as shown in step S265B, the system chip 170 may control the fifth switch S5 to be turned on to provide the input voltage to the boost converter 1522 by using the series voltage 2×vbat of the battery 120 and the first capacitor C1. And, after the end of the discharge, reentering the third control phase D3. For details, reference may be made to the above description of the embodiment of the present application in conjunction with fig. 12B, which is not repeated here.

S27, in the case where the charging voltage VBUS is greater than or equal to the preset voltage threshold Vc, or in the case where the battery voltage VBAT is greater than the second voltage threshold Vb, the system chip 170 controls the sixth switch S6 to be turned on. Optionally, to ensure power supply performance, the system chip 170 may also control the fifth switch S5 to be turned off. In some embodiments, for the circuit shown in fig. 13, the system chip 170 may also control the thirteenth switch S13 to be turned on and the fourteenth switch S14 to be turned off when the input voltage needs to be provided to the buck converter 1521, and control according to the control logic of the first control stage D1 and the second control stage D2; and, when it is desired to provide the boost converter 1521 with an input voltage, the fourteenth switch S14 may be controlled to be turned on and the thirteenth switch S13 may be controlled to be turned off, and in accordance with the control logic of the third control stage D3 and the fourth control stage D4.

And, based on the same inventive concept, the embodiment of the present application also provides another power processing method, which is applied to the power processing module shown in fig. 18 in combination with the embodiment of the present application.

The electric energy processing method comprises the following steps: during the reverse charging process, the system chip 170 controls the seventeenth switch S17 and the fifth switched capacitor circuit 156 to obtain an equal proportion of boosted voltage, such as 2×vbat. The scaled up voltage is provided to the other end of buck converter 155 to reduce the voltage differential across buck converter 155.

It should be noted that, for specific control logic of the system chip 170, reference may be made to the above-mentioned portions of the embodiments of the present application in connection with the description of fig. 18, which is not repeated.

It will be appreciated that the electronic device, in order to achieve the above-described functions, includes corresponding hardware and/or software modules that perform the respective functions. The steps of an algorithm for each example described in connection with the embodiments disclosed herein may be embodied in hardware or a combination of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Those skilled in the art may implement the described functionality using different approaches for each particular application in conjunction with the embodiments, but such implementation is not to be considered as outside the scope of this application.

In one example, fig. 21 shows a schematic block diagram of an apparatus 600 of an embodiment of the present application. The apparatus 600 may include: processor 601 and transceiver/transceiving pin 602, optionally, also include memory 603.

The various components of device 600 are coupled together by bus 604, where bus 604 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are referred to in the figures as bus 604.

Alternatively, the memory 603 may be used for instructions in the foregoing method embodiments. The processor 601 is operable to execute instructions in the memory 603 and control the receive pin to receive signals and the transmit pin to transmit signals.

The apparatus 600 may be an electronic device or a chip of an electronic device in the above-described method embodiments.

All relevant contents of each step related to the above method embodiment may be cited to the functional description of the corresponding functional module, which is not described herein.

The steps performed by the terminal device 100 in the power processing method provided in the embodiment of the present application may also be performed by a chip system included in the terminal device 100, where the chip system may include a processor and a bluetooth chip. The chip system may be coupled to a memory such that the chip system, when running, invokes a computer program stored in the memory, implementing the steps performed by the electronic device 100 described above. The processor in the chip system can be an application processor or a non-application processor.

The above embodiments are merely for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A power management circuit for use with an electronic device, the electronic device including a battery, an electrical load, the circuit comprising:

the first switch capacitor module is connected with the battery and is used for acquiring the battery voltage and adjusting the battery voltage to be a first voltage;

the direct current converter is respectively connected with the first switch capacitor module and the electric load, and is used for acquiring a first voltage output by the first switch capacitor module, adjusting the first voltage into a second voltage and outputting the second voltage to the electric load;

wherein an absolute difference between the first voltage and the second voltage is less than an absolute difference between the battery voltage and the second voltage.

2. The circuit of claim 1, wherein the DC converter comprises a first buck converter, the first voltage comprises a first sub-voltage,

the first switch capacitor module is used for reducing the first voltage to obtain the first sub-voltage;

wherein the first sub-voltage is greater than or equal to the second voltage.

3. The circuit of claim 1, wherein the DC converter comprises a boost converter, the first voltage comprises a second sub-voltage,

the first switch capacitor module is used for boosting the first voltage to obtain the second sub-voltage;

wherein the second sub-voltage is less than or equal to the second voltage.

4. A circuit according to claim 2 or 3, wherein the first switched capacitor module comprises:

a first switch;

the first connecting end of the second switch is connected with the second connecting end of the first switch, and the second connecting end of the second switch is connected with one end of the battery;

the first connecting end of the third switch is connected with the second connecting end of the second switch;

a fourth switch, a first connection end of which is connected with a second connection end of the third switch, and the second connection end of which and the other end of the battery are both connected to a first reference potential end;

the first connecting end of the fifth switch is connected with the first connecting end of the first switch;

a first capacitor, one end of which is connected with a second connection end of the first switch, and the other end of which is connected to the first reference potential end;

And one end of the second capacitor is respectively connected with the second connecting end of the fifth switch and the input end of the direct current converter, and the other end of the second capacitor is connected with a second reference potential end.

5. The circuit of claim 1, wherein the power management circuit further comprises:

the voltage detector is connected with the battery and is used for collecting the battery voltage of the battery;

the controller is respectively connected with the voltage detector and the first switch capacitor module and is used for acquiring the battery voltage acquired by the voltage detector and controlling the first switch capacitor module to adjust the battery voltage to the first voltage under the condition that the battery voltage meets the preset voltage adjustment condition.

6. The circuit of claim 2, wherein the power management circuit further comprises:

and the controller is used for controlling the first switch capacitor module to step down the first voltage to obtain the first sub-voltage under the condition that the battery voltage is larger than or equal to a first voltage threshold value.

7. The circuit of claim 3, wherein the power management circuit further comprises:

And the controller is used for controlling the first switch capacitor module to boost the first voltage to obtain the second sub-voltage under the condition that the battery voltage is smaller than or equal to a second voltage threshold value.

8. The circuit of claim 4, wherein the dc converter comprises a first buck converter, the first voltage comprising a first sub-voltage, the power management circuit further comprising:

the controller is used for controlling the first switch capacitor module alternately according to the switch control logic of the first control stage and the second control switch;

wherein, in the first control stage, the controller controls the first switch, the third switch and the fifth switch to be on, and controls the second switch and the fourth switch to be off so as to charge the first capacitor and the second capacitor which are connected in series by using the battery;

in the second control stage, the controller controls the fifth switch to be opened so as to output the voltage of the second capacitor to the input end of the first buck converter;

the first sub-voltage is the voltage of the second capacitor.

9. The circuit of claim 4, wherein the dc converter comprises a boost converter, the first voltage comprises a second sub-voltage, and the power management circuit further comprises:

The controller is used for controlling the first switch capacitor module alternately according to the switch control logic of the third control stage and the switch control logic of the fourth control switch;

wherein, in the third control stage, the controller controls the first switch, the third switch and the fifth switch to be turned off, and controls the second switch and the fourth switch to be turned on so as to connect the first capacitor and the battery in parallel;

in the fourth control stage, the controller controls the first switch, the third switch and the fifth switch to be turned on, and controls the second switch and the fourth switch to be turned off so as to connect the first capacitor and the battery in series, and one end of the first capacitor is connected with the input end of the boost converter;

wherein the second sub-voltage is the sum of the battery voltage and the voltage of the first capacitor.

10. The circuit of claim 4, wherein the power management circuit further comprises:

and one end of the sixth switch is used for receiving the third voltage, and the other end of the sixth switch is connected with the input end of the direct-current converter.

11. The circuit of claim 10, wherein the dc converter comprises a first buck converter, the first voltage comprising a first sub-voltage, the power management circuit further comprising:

and the controller is used for controlling the sixth switch to be conducted under the condition that the battery voltage is smaller than a first voltage threshold value so as to output the third voltage to the input end of the first buck converter, so that the first buck converter regulates the third voltage to the first sub-voltage.

12. The circuit of claim 10, wherein the dc converter comprises a boost converter, the first voltage comprises a second sub-voltage, and the power management circuit further comprises:

and the controller is used for controlling the sixth switch to be conducted under the condition that the battery voltage is larger than a second voltage threshold value so as to output the third voltage to the input end of the boost converter, so that the boost converter adjusts the third voltage to the second sub-voltage.

13. The circuit of claim 10, wherein the power management circuit further comprises:

the controller is used for acquiring the charging voltage of the charging interface; and controlling the sixth switch to be conducted under the condition that the charging voltage is greater than or equal to a preset voltage threshold value, so as to output the third voltage to the input end of the direct current converter, and enabling the direct current converter to adjust the third voltage to the first voltage.

14. The circuit of claim 10, wherein the circuit further comprises a logic circuit,

the third voltage is the battery voltage or a system voltage.

15. The circuit of claim 1, wherein the electronic device further comprises a charging interface, the first switched capacitor module is coupled to the charging interface,

the first switch capacitor module is further used for obtaining a fourth voltage output by the charging interface, and reducing the fourth voltage to obtain a fifth voltage; and outputting the fifth voltage to the battery to charge the battery with the fifth voltage.

16. The circuit of claim 1, wherein the electronic device further comprises a charging interface and a second buck converter, the power management circuit further comprises a second switched capacitor module,

one end of the second switch capacitor module is connected with the battery, the other end of the second switch capacitor module is connected with one end of the second buck converter, the other end of the second buck converter is connected with the charging interface,

the second switch capacitor module is used for obtaining the battery voltage, boosting the battery voltage to obtain a sixth voltage, and outputting the sixth voltage to the charging interface.

17. A method of power management as claimed in any one of claims 1 to 16, applied to a power management circuit, the method comprising:

the first switch capacitor module acquires the battery voltage;

the first switch capacitor module adjusts the battery voltage to a first voltage;

the direct current converter adjusts the first voltage to a second voltage;

the direct current converter outputs the second voltage to an electric load so as to utilize the second voltage to supply power for the electric load, wherein the absolute difference value of the first voltage and the second voltage is smaller than the absolute difference value of the battery voltage and the second voltage.

18. The method of claim 17, wherein prior to the first switched capacitor module adjusting the battery voltage to a first voltage, the method further comprises:

the voltage detector acquires the voltage of the battery to obtain the voltage of the battery;

and the controller controls the first switch capacitor module to adjust the battery voltage to a first voltage under the condition that the battery voltage meets a preset voltage adjustment condition.

19. The method of claim 18, wherein the dc converter comprises a first buck converter, the first voltage comprising a first sub-voltage;

The first switched capacitor module includes: the first switch, the second switch, the third switch, the fourth switch, the fifth switch, the first capacitor and the second capacitor are sequentially connected in series; the first connecting end of the fifth switch is connected with the first connecting end of the first switch; one end of the first capacitor is connected with the second connecting end of the first switch, and the other end of the first capacitor is connected to the first reference potential end; one end of the second capacitor is connected with the second connecting end of the fifth switch and the input end of the first buck converter respectively, and the other end of the second capacitor is connected with a second reference potential end;

the method further comprises the steps of:

the controller controls the first switch capacitor module alternately according to the switch control logic of the first control stage and the second control switch;

in the second control stage, the controller controls the fifth switch to be turned off so as to output the voltage of the second capacitor to the input end of the first buck converter.

20. The method of claim 18, wherein the dc converter comprises a boost converter and the first voltage comprises a second sub-voltage:

the first switched capacitor module includes: the first switch, the second switch, the third switch, the fourth switch, the fifth switch, the first capacitor and the second capacitor are sequentially connected in series; the first connecting end of the fifth switch is connected with the first connecting end of the first switch; one end of the first capacitor is connected with the second connecting end of the first switch, and the other end of the first capacitor is connected to the first reference potential end; one end of the second capacitor is connected with the second connecting end of the fifth switch and the input end of the boost converter respectively, and the other end of the second capacitor is connected with a second reference potential end;

the method further comprises the steps of:

the controller controls the first switched capacitor module alternately according to the switch control logic of the third control stage and the fourth control switch;

wherein, in the third control stage, the controller controls the first switch, the third switch and the fifth switch to be turned off, and controls the second switch and the fourth switch to be turned on, so as to charge the battery by using the first capacitor;

In the fourth control stage, the controller controls the first switch, the third switch and the fifth switch to be turned on, and controls the second switch and the fourth switch to be turned off, so that the first capacitor and the battery are connected in series, and one end of the first capacitor is connected with the input end of the boost converter.

21. The method of claim 18, wherein the DC converter comprises a first buck converter, the first voltage comprises a first sub-voltage,

the controller controls the first switched capacitor module to adjust the battery voltage to a first voltage when the battery voltage meets a preset voltage adjustment condition, including:

the controller outputs a third voltage to an input of the first buck converter when the battery voltage is less than a first voltage threshold, such that the first buck converter adjusts the third voltage to the first sub-voltage.

22. The method of claim 18, wherein the DC converter comprises a boost converter, the first voltage comprises a second sub-voltage,

the controller outputs a third voltage to an input of the boost converter when the battery voltage is greater than a second voltage threshold, such that the boost converter adjusts the third voltage to the second sub-voltage.

23. An electronic device, comprising:

a battery;

an electrical load;

the power management circuit of any one of claims 1-16.