Charging circuit, electronic device, charging method, and charging device

Abstract

This disclosure relates to a charging circuit, electronic device, charging method, and charging apparatus. The charging circuit includes: a charging interface and a battery cell; a charge pump circuit connected to the charging interface and the battery cell; a power management integrated circuit connected to the charge pump circuit and the battery cell; and a control circuit connected to the charge pump circuit and the power management integrated circuit, at least for controlling the charge pump circuit and the power management integrated circuit to simultaneously charge the battery cell when the charging circuit is in fast charging mode. Embodiments of this disclosure achieve fast charging while reducing material costs.

Description

Technical Field

[0001] This disclosure relates to the field of integrated circuits, and more particularly to a charging circuit, electronic device, charging method, and charging apparatus. Background Technology

[0002] With the development of charging technology, high-power fast charging of electronic devices has become a trend. For example, 90W, 100W, or 120W power can be used to charge electronic devices. Currently, multiple charge pump circuits are typically connected in parallel to achieve high-power charging, which results in relatively high material costs for electronic devices. Therefore, how to reduce material costs while achieving high-power charging has become an urgent problem to be solved. Summary of the Invention

[0003] To overcome the problems existing in related technologies, this disclosure provides a charging circuit, electronic device, charging method, and charging apparatus that can reduce material costs while achieving fast charging.

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

[0005] Charging port and battery unit;

[0006] A charge pump circuit is connected to the charging interface and the battery cell;

[0007] A power management integrated circuit is connected to the charge pump circuit and the battery cell;

[0008] A control circuit, connected to the charge pump circuit and the power management integrated circuit, is at least used to control the charge pump circuit and the power management integrated circuit to charge the battery cell simultaneously when the charging circuit is in fast charging mode.

[0009] In some embodiments, the charge pump circuit includes a first charge pump;

[0010] The input terminal of the first charge pump is connected to the charging interface;

[0011] The first output terminal of the first charge pump is connected to the input terminal of the power management integrated circuit;

[0012] The second output terminal of the first charge pump is connected to the battery cell;

[0013] The output terminal of the power management integrated circuit is connected to the battery cell;

[0014] The control circuit, connected to the first charge pump and the power management integrated circuit, is used to control the first charge pump and the power management integrated circuit to charge the battery cell when the charging circuit is in the fast charging mode.

[0015] In some embodiments, the charging circuit further includes an overvoltage protection circuit;

[0016] The input terminal of the overvoltage protection circuit is connected to the charging interface;

[0017] The output terminal of the overvoltage protection circuit and the first output terminal of the first charge pump are both connected to the input terminal of the power management integrated circuit.

[0018] When the charging circuit is in the fast charging mode, the overvoltage protection circuit is turned off, and the first charge pump and the power management integrated circuit are controlled to charge the battery cell.

[0019] When the charging circuit is in non-fast charging mode, the overvoltage protection circuit is activated, and the power management integrated circuit is controlled to charge the battery cell and the first charge pump is controlled to stop working.

[0020] In some embodiments, the control circuit is configured to control the first charge pump and the power management integrated circuit to charge the battery cell when the current power supply transmitted through the charging interface is greater than a preset power threshold; and to control the first charge pump to charge the battery cell and the power management integrated circuit to stop charging the battery cell when the current power supply is less than or equal to the preset power threshold.

[0021] In some embodiments, the control circuit is configured to control the power management integrated circuit to charge the battery cell and control the first charge pump to stop charging the battery cell when the current charging current transmitted to the battery cell is less than a preset current threshold; and to continue controlling the first charge pump to charge the battery cell when the current charging current transmitted to the battery cell is greater than or equal to the preset current threshold.

[0022] In some embodiments, the control circuit is configured to obtain the power difference between the current power supply and the preset power threshold, allocate charging power to the first charge pump based on the preset power threshold, and allocate charging power to the power management integrated circuit based on the power difference.

[0023] In some embodiments, the first charge pump includes a 4:1 charge pump.

[0024] In some embodiments, the charge pump circuit includes:

[0025] A second charge pump is connected to a first connection line between the charging interface and the battery cell;

[0026] A third charge pump is connected in series with the power management integrated circuit in a second connection line between the charging interface and the battery cell; the second connection line is connected in parallel with the first connection line.

[0027] The control circuit, connected to the second charge pump and the power management integrated circuit, is used to control the second charge pump and the power management integrated circuit to charge the battery cell when the charging circuit is in the fast charging mode.

[0028] In some embodiments, the control circuit is configured to determine the product between the current voltage transmitted through the charging interface and the buck ratio of the third charge pump, and control the third charge pump to perform buck conversion when the current voltage difference between the product and a preset voltage threshold is greater than the current voltage of the battery cell; and control the third charge pump to be in pass-through mode when the current voltage difference is less than or equal to the current voltage of the battery cell.

[0029] In some embodiments, the second charge pump includes a 4:1 charge pump; the third charge pump includes a 4:2 charge pump.

[0030] According to a second aspect of the present disclosure, an electronic device is provided, comprising: a charging circuit as described in the first aspect above.

[0031] According to a third aspect of the present disclosure, a charging method is provided, comprising:

[0032] Detect the charging mode of the charging circuit in an electronic device;

[0033] When the charging circuit is in fast charging mode, the charge pump circuit and the power management integrated circuit in the charging circuit are controlled to charge the battery cells of the charging circuit simultaneously.

[0034] In some embodiments, controlling the charge pump circuit and the power management integrated circuit in the charging circuit to simultaneously charge the battery cells of the charging circuit includes:

[0035] The charge pump circuit, including a first charge pump and the power management integrated circuit, is used to charge the battery cell.

[0036] or,

[0037] The charge pump circuit, including the second charge pump and the power management integrated circuit, is used to charge the battery cell.

[0038] In some embodiments, the control of the charge pump circuit, including a first charge pump and the power management integrated circuit, to charge the battery cell includes:

[0039] If the current power supplied through the charging interface is greater than a preset power threshold, the first charge pump and the power management integrated circuit are controlled to charge the battery cell.

[0040] If the current power supply is less than or equal to the preset power threshold, the first charge pump is controlled to charge the battery cell, and the power management integrated circuit is controlled to stop charging the battery cell.

[0041] In some embodiments, the method further includes:

[0042] If the current charging current transmitted to the battery cell is less than a preset current threshold, the power management integrated circuit is controlled to charge the battery cell, and the first charge pump is controlled to stop charging the battery cell.

[0043] If the current charging current transmitted to the battery cell is greater than or equal to the preset current threshold, the first charge pump continues to charge the battery cell.

[0044] In some embodiments, controlling the first charge pump and the power management integrated circuit to charge the battery cell includes:

[0045] Obtain the power difference between the current power supply and the preset power threshold;

[0046] The first charge pump is controlled to charge the battery cell at the preset power threshold.

[0047] The power management integrated circuit is controlled to charge the battery cell using the differential power.

[0048] In some embodiments, the method further includes:

[0049] Determine the product between the current voltage transmitted through the charging interface and the step-down ratio of the third charge pump; wherein the second connection line connecting the third charge pump to the power management integrated circuit is connected in parallel with the first connection line connecting the second charge pump;

[0050] If the current voltage difference between the product and the preset voltage threshold is greater than the current voltage of the battery cell, the third charge pump is controlled to perform a step-down conversion.

[0051] When the current differential voltage is less than or equal to the current voltage of the battery cell, the third charge pump is controlled to be in pass-through mode.

[0052] In some embodiments, the method further includes:

[0053] When the charging circuit is in the fast charging mode, the overvoltage protection circuit, which is connected to the input terminal of the power management integrated circuit along with the first output terminal of the first charge pump, is turned off.

[0054] When the charging circuit is in non-fast charging mode, the overvoltage protection circuit is activated, and the power management integrated circuit is controlled to charge the battery cell and the first charge pump is controlled to stop working.

[0055] According to a fourth aspect of the present disclosure, a charging device is provided, comprising:

[0056] The detection module is configured to detect the charging mode of the charging circuit in the electronic device;

[0057] The control module is configured to control the charge pump circuit and the power management integrated circuit in the charging circuit to charge the battery cells of the charging circuit simultaneously when the charging circuit is in fast charging mode.

[0058] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0059] This disclosure proposes a power management integrated circuit (IC) connected to both a charge pump circuit and a battery cell, enabling it to work with the charge pump circuit to charge the battery cell, achieving fast charging. In other words, this disclosure eliminates the need for multiple parallel charge pumps by adding a power management IC for fast charging, thus reducing material costs while achieving fast charging. Furthermore, compared to not using the power management IC during fast charging, this disclosure integrates the power management IC with the battery cell to achieve fast charging, making fuller use of its functionality and improving its utilization rate.

[0060] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0061] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0062] Figure 1 This is a schematic diagram of the charging circuit of the present disclosure according to an exemplary embodiment. Figure 1 .

[0063] Figure 2 This is a schematic diagram of the charging circuit of the present disclosure according to an exemplary embodiment. Figure 2 .

[0064] Figure 3 This is a schematic diagram of a conventional charging circuit according to an exemplary embodiment. Figure 1 .

[0065] Figure 4 This is a schematic diagram of a conventional charging circuit according to an exemplary embodiment. Figure 2 .

[0066] Figure 5 This is a schematic diagram of the charging circuit of the present disclosure according to an exemplary embodiment. Figure 3 .

[0067] Figure 6 This is a schematic diagram of a conventional charging circuit according to an exemplary embodiment. Figure 3 .

[0068] Figure 7 This is a flowchart illustrating a charging method according to an exemplary embodiment. Figure 1 .

[0069] Figure 8 This is a flowchart illustrating a charging method according to an exemplary embodiment. Figure 2 .

[0070] Figure 9 This is a flowchart illustrating a charging method according to an exemplary embodiment. Figure 3 .

[0071] Figure 10 This is a structural block diagram of an electronic device according to an exemplary embodiment. Detailed Implementation

[0072] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of electronic devices and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0073] This disclosure provides a charging circuit. Figure 1 This is a schematic diagram of the charging circuit of the present disclosure according to an exemplary embodiment. Figure 1 .like Figure 1 As shown, the charging circuit includes:

[0074] Charging port 101 and battery unit 102;

[0075] The charge pump circuit 103 is connected to the charging interface 101 and the battery cell 102;

[0076] The power management integrated circuit 104 is connected to the charge pump circuit 103 and the battery cell 102;

[0077] A control circuit (not shown in the figure) is connected to the charge pump circuit 103 and the power management integrated circuit 104, and is used at least to control the charge pump circuit 103 and the power management integrated circuit 104 to charge the battery cell 102 simultaneously when the charging circuit is in fast charging mode.

[0078] In this embodiment of the disclosure, the charging circuit is applied in an electronic device, which can be a portable mobile device, including smartphones, laptops, tablets, wearable devices (such as smartwatches or smart bracelets), in-vehicle devices, etc.

[0079] It should be noted that this charging circuit is suitable for wired charging scenarios. It connects to an external device via a charging interface to charge the battery unit through the power supplied by the external device.

[0080] Here, the maximum charging power and / or charging protocol provided by the external device differs, allowing the charging circuit to employ different charging modes to charge the battery cells. If the power provided by the external device exceeds the preset power, and the external device and the charging circuit support the same fast charging protocol, then the charging circuit, powered by the external device, can use fast charging mode to charge the battery cells. If the power provided by the external device is less than the preset power, then the charging circuit, powered by the external device, can use normal charging mode (non-fast charging mode) to charge the battery cells. Here, the charging time in fast charging mode is shorter than the charging time in normal charging mode.

[0081] For example, when an external device is connected to the charging interface and provides power to the charging interface, if the power provided by the external device is 90W, 100W or 120W, the charging circuit can activate the fast charging mode and control the charge pump circuit and the power management integrated circuit to charge the battery cell together to achieve fast charging.

[0082] The charging port described above is used to connect external devices, including but not limited to adapters. Here, the adapter can be connected to the charging port via a data cable.

[0083] For example, the charging interface may include, but is not limited to, a Universal Serial Bus (USB), a Type-C interface, a Micro USB interface, or a Lightning interface.

[0084] The aforementioned battery cell is a rechargeable battery and can be composed of at least one cell. The type of battery cell includes, but is not limited to, lithium batteries.

[0085] The aforementioned charge pump circuit is used to convert the input voltage to achieve the purpose of fast charging of the battery cells.

[0086] It should be noted that the charge pump circuit can be composed of a single charge pump circuit, or it can be formed by multiple charge pump circuits connected in series or in parallel. This disclosure does not impose any limitations on the embodiments.

[0087] In this embodiment of the disclosure, when the charge pump circuit includes multiple charge pumps, the multiple charge pumps may be charge pumps with different buck ratios or boost ratios, or they may be charge pumps capable of handling different input voltage ranges.

[0088] It should be noted that each charge pump includes at least a switching element and a capacitor. The switching element is used to control the charging and discharging of the capacitor, thereby enabling the output of a stable voltage to quickly charge the battery cell.

[0089] In this embodiment, the power management integrated circuit (PMIC) is used at least to convert the input voltage to charge the battery cell. Of course, the PMIC can also be used to handle battery cell charge and discharge management tasks, etc., and this embodiment does not limit this use.

[0090] It should be noted that the topology of PMIC for input voltage conversion includes at least buck converter, boost converter, and buck-boost converter, and the embodiments disclosed herein are not limited thereto.

[0091] The aforementioned power management integrated circuit is connected to both the charge pump circuit and the battery cell. Here, the connection between the power management integrated circuit and the at least one charge pump included in the charge pump circuit is configured to enable both the charge pump circuit and the power management integrated circuit to charge the battery cell together; the specific connection method is not limited in this embodiment.

[0092] For example, when a charge pump circuit includes a charge pump, the input of the power management integrated circuit can be connected to the charge pump, and the output of the power management integrated circuit can be connected to the battery cell.

[0093] For example, when a charge pump circuit includes multiple charge pumps, the power management integrated circuit can be connected in parallel with some of the charge pumps and in series with another part of the charge pumps.

[0094] The aforementioned control circuit can be used to control the charge pump circuit and the power management integrated circuit to charge the battery cells simultaneously when the charging circuit is in fast charging mode.

[0095] Here, controlling the charge pump circuit and the power management integrated circuit to charge the battery cell simultaneously can include: controlling the power management integrated circuit and the charge pump circuit to charge the battery cell simultaneously based on the battery information of the battery cell.

[0096] The battery information of the battery cell may include: the maximum charging power of the battery cell, the capacity of the battery cell, the current temperature of the battery cell, the current voltage of the battery cell, etc., and this embodiment does not limit these.

[0097] In this embodiment, a charge pump circuit is connected to the battery cell, thereby enabling the charge pump circuit to charge the battery cell. A power management integrated circuit is connected to both the charge pump circuit and the battery cell, and can convert the voltage input to the charge pump circuit to output a stable voltage for charging the battery cell. In other words, the control circuit of this embodiment can simultaneously control the charge pump circuit and the power management integrated circuit to charge the battery cell.

[0098] For example, in related technologies, fast charging typically employs two charge pumps connected in parallel. For a charging scheme for a 60W–67W single-cell battery unit, the output parameters of the two charge pumps are 5V / 12A, with each charge pump outputting 5V / 6A; for a charging scheme for a 120W dual-cell battery unit, the output parameters of the two charge pumps are 10V / 12A, with each charge pump outputting 10V / 6A.

[0099] Furthermore, when fast charging is performed using two charge pumps connected in parallel, the PMIC does not participate in the fast charging process and remains in a non-operating state. In normal charging mode (non-fast charging mode), the PMIC charges the battery cells using a charging current of 3A to 4A. Therefore, the fast charging solutions in related technologies not only require two charge pumps connected in parallel, resulting in high material costs, but also suffer from low PMIC utilization.

[0100] Based on this, embodiments of this disclosure propose connecting a power management integrated circuit (IC) to both the charge pump circuit and the battery cell, enabling it to work with the charge pump circuit to charge the battery cell, thus achieving fast charging. In other words, by adding a power management IC for fast charging, this disclosure eliminates the need for multiple parallel charge pumps, thereby reducing material costs while achieving fast charging. Furthermore, compared to not using the power management IC during fast charging, this disclosure combines the power management IC with the battery cell to achieve fast charging, making fuller use of its functionality and improving its utilization rate.

[0101] In some embodiments, Figure 2 This is a schematic diagram of the charging circuit of the present disclosure according to an exemplary embodiment. Figure 2 .like Figure 1 and Figure 2 As shown, the charge pump circuit 103 includes a first charge pump 103A;

[0102] The input terminal of the first charge pump 103A is connected to the charging interface 101;

[0103] The first output terminal of the first charge pump 103A is connected to the input terminal of the power management integrated circuit 104;

[0104] The second output terminal of the first charge pump 103A is connected to the battery cell 102;

[0105] The output terminal of the power management integrated circuit 104 is connected to the battery cell 102;

[0106] A control circuit (not shown in the figure) is connected to the first charge pump 103A and the power management integrated circuit 104, and is used to control the first charge pump 103A and the power management integrated circuit 104 to charge the battery cell 102 when the charging circuit is in fast charging mode.

[0107] In other words, the power management integrated circuit and the first charge pump are connected in series. The integrated circuit can convert the output voltage of the first output terminal of the first charge pump and output a stable voltage to the battery cell, thereby enabling it to work together with the first charge pump to power the battery cell.

[0108] In this embodiment of the disclosure, the output voltage of the power management integrated circuit can be the same as the output voltage of the second output of the first charge pump, that is, the first charge pump and the power management integrated circuit can output the same voltage to charge the battery cell.

[0109] It should be noted that the voltage at the first output terminal of the first charge pump is greater than the voltage at the second output terminal of the first charge pump. Thus, after voltage conversion by the power management integrated circuit, the power management integrated circuit can output the same voltage as the first charge pump to charge the battery cell.

[0110] For example, such as Figure 2 As shown, the first charge pump 103A has four voltage output terminals: the first output terminal outputs 10V, the second output terminal outputs 5V, and the third output terminal outputs 15V. The input terminal of the power management integrated circuit is connected to the first output terminal, enabling it to convert 10V to 5V for the battery cell. The second output terminal of the first charge pump directly outputs 5V to the battery cell.

[0111] In this embodiment of the disclosure, the specifications of the first charge pump can be set according to the voltage transmitted by the charging interface. In some embodiments, the first charge pump includes a 4:1 charge pump.

[0112] It should be noted that when the voltage transmitted through the charging interface is 20V, if the 4:1 charge pump performs voltage conversion, the 20V will first be converted to 10V, and then the 10V will be output from the first output terminal to the power management integrated circuit, so that the power management integrated circuit will convert the 10V to 5V to charge the battery cell.

[0113] In other words, in this embodiment of the present disclosure, the first output terminal of the first charge pump is connected to the input terminal of the power management integrated circuit, which enables the PMIC to replace part of the 10V to 5V conversion in the first charge pump, thereby enabling high-power charging through the first charge pump and the PMIC to improve the charging speed.

[0114] For example, in a related art, Figure 3 This is a schematic diagram of a conventional charging circuit according to an exemplary embodiment. Figure 1 .like Figure 3 As shown, for 90W fast charging, since the maximum power output of the 4:1 charge pump is 90W, one 4:1 charge pump can be set up, and the 4:1 charge pump is connected in parallel with the high-voltage PMIC between the charging interface 101 and the battery cell 102. The high-voltage PMIC supports high-voltage charging.

[0115] In another related technology, Figure 4 This is a schematic diagram of a conventional charging circuit according to an exemplary embodiment. Figure 2 .like Figure 4 As shown, for 100W or 120W fast charging, since the maximum power output of the 4:1 charge pump is 90W, therefore... Figure 4On top of that, an additional 4:1 charge pump needs to be installed, and both 4:1 charge pumps and the high-voltage PMIC are connected in parallel between the charging interface 101 and the battery unit 102.

[0116] It should be noted that the fast charging solutions for 90W and above power in related technologies use a parallel charging method by adding charge pumps, which still suffers from high material costs and low PMIC utilization.

[0117] Based on this, the embodiments of this disclosure propose that the second output terminal of the first charge pump is connected to the battery cell, the first output terminal of the first charge pump is connected to the input terminal of the power management integrated circuit (PMIC), and the output terminal of the PMIC is connected to the battery cell. In other words, the first charge pump in this embodiment is no longer connected in parallel with the PMIC; instead, voltage conversion is performed through the PMIC. This allows a portion of the voltage conversion work in the first charge pump to be replaced by the PMIC, thereby enabling high-power charging to improve charging speed, such as achieving fast charging at 90W, 100W, or 120W. Furthermore, the PMIC in this embodiment processes the voltage after being stepped down by the first charge pump, thus eliminating requirements on the input voltage supported by the PMIC, expanding the application scenarios of the charging circuit and improving its versatility.

[0118] Furthermore, the embodiments disclosed herein do not require an additional number of charge pumps for higher power fast charging, which not only reduces material costs while achieving fast charging, but also reduces the space occupied by the charging circuit in the electronic device, thereby improving the space utilization of the electronic device.

[0119] Furthermore, compared to not using the PMIC during fast charging, the embodiments of this disclosure combine the PMIC to achieve fast charging of the battery cells, which can make fuller use of the PMIC's functions and thus improve the utilization rate of the PMIC.

[0120] In some embodiments, such as Figure 2 As shown, the charging circuit also includes an overvoltage protection circuit 105;

[0121] The input terminal of the overvoltage protection circuit 105 is connected to the charging interface 101;

[0122] The output terminal of the overvoltage protection circuit 105 and the first output terminal of the first charge pump 103A are both connected to the input terminal of the power management integrated circuit 104.

[0123] When the charging circuit is in fast charging mode, the overvoltage protection circuit 105 is turned off, and the first charge pump 103A and the power management integrated circuit 104 are controlled to charge the battery cell 102.

[0124] When the charging circuit is in non-fast charging mode, the overvoltage protection circuit 105 is activated, and the power management integrated circuit 104 is controlled to charge the battery cell 102 and to stop the first charge pump 103A from working.

[0125] In this embodiment, after the overvoltage protection (OVP) circuit is turned off, the connection between the charging interface and the input terminal of the power management integrated circuit is open. At this time, the input terminal of the PMIC is connected to the first output terminal of the first charge pump and disconnected from the charging interface, thereby allowing the PMIC to replace part of the voltage conversion work in the first charge pump, realizing the charging of the battery cell by the first charge pump and the PMIC.

[0126] In this embodiment, after the overvoltage protection circuit is activated, the connection between the charging interface and the input terminal of the power management integrated circuit (PMIC) remains open. Since the first charge pump stops working, its first output terminal does not output voltage. The PMIC directly converts the voltage transmitted through the charging interface and outputs a stable voltage to charge the battery cells.

[0127] It should be noted that, considering that the PMIC may directly convert the voltage transmitted through the charging interface, which could lead to overvoltage and damage to the circuit, an overvoltage protection circuit was proposed. This circuit can then suspend output when the voltage transmitted through the charging interface exceeds a preset overvoltage threshold, thus protecting the downstream circuitry.

[0128] It is understood that the charging circuit of this disclosure embodiment can control different devices to charge the battery cells under different charging modes to adapt to different charging scenarios. Furthermore, the overvoltage protection circuit in this disclosure embodiment can provide protection when the charging circuit is in non-fast charging mode, reducing the possibility of device damage.

[0129] In some embodiments, the control circuit is configured to control the first charge pump and the power management integrated circuit to charge the battery cell when the current power supplied through the charging interface is greater than a preset power threshold; and to control the first charge pump to charge the battery cell and the power management integrated circuit to stop charging the battery cell when the current power supplied is less than or equal to the preset power threshold.

[0130] In this embodiment of the disclosure, the control circuit requests the current power supply from the external device connected to the charging interface based on the voltage and / or temperature of the battery cell, and transmits the current power supply to the charging circuit through the charging interface, so that the charging circuit can use the current power supply to charge the battery cell.

[0131] It should be noted that during the charging process of the first charge pump and the power management integrated circuit for the battery cell, as the voltage of the battery cell increases, the current power supply requested by the control circuit from the external device will decrease. When the current power supply decreases to less than or equal to the preset power threshold, the power management integrated circuit will stop working, and the first charge pump will charge the battery cell independently.

[0132] In this embodiment of the disclosure, the preset power threshold can be the maximum charging power that the first charge pump can support.

[0133] It is understood that, considering that the maximum charging power that the first charge pump can support is a preset power threshold, and that the charging efficiency of the first charge pump is greater than the charging efficiency of the power management integrated circuit, this embodiment proposes to control the first charge pump and the power management integrated circuit to charge the battery cell when the current power supply is greater than the preset power threshold; and to control the first charge pump to charge the battery cell and control the power management integrated circuit to stop charging the battery cell when the current power supply is less than or equal to the preset power threshold.

[0134] Thus, the embodiments of this disclosure not only achieve fast charging but also improve charging efficiency, achieving optimal charging results. Furthermore, when the current power supply is less than or equal to a preset power threshold, the power management integrated circuit stops charging the battery cells, meaning the first charge pump can be switched to independently fast charge the battery cells. Therefore, compared to both the first charge pump and the power management integrated circuit operating simultaneously, the embodiments of this disclosure can reduce charging power consumption while simultaneously achieving fast charging.

[0135] In this embodiment of the disclosure, controlling the first charge pump and the power management integrated circuit to charge the battery cell may include: allocating power to the first charge pump and the power management integrated circuit respectively based on the current power supply; and controlling the first charge pump and the power management integrated circuit to charge the battery cell based on the allocated power.

[0136] It should be noted that power can be allocated to the first charge pump and the power management integrated circuit according to different allocation methods. For example, the charging power allocated to the first charge pump can be greater than, less than, or equal to the charging power allocated to the power management integrated circuit.

[0137] In some embodiments, the control circuit is configured to acquire the power difference between the current power supply and a preset power threshold, allocate charging power to the first charge pump based on the preset power threshold, and allocate charging power to the power management integrated circuit based on the power difference.

[0138] In this embodiment of the disclosure, allocating charging power to the first charge pump based on a preset power threshold may include: the charging power allocated to the first charge pump is the preset power threshold; allocating charging power to the power management integrated circuit based on differential power may include: the charging power allocated to the power management integrated circuit is the differential power.

[0139] In other words, in fast charging mode, the control circuit can control the first charge pump to charge the battery cell at a preset power threshold, and control the power management integrated circuit to charge the battery cell at differential power.

[0140] For example, the first charge pump is a 4:1 charge pump with a maximum power of 90W, and the first charge pump and PMIC can be controlled to charge the battery cell according to the charging power allocation table.

[0141] When the current power supply is 100W, the first charge pump is controlled to charge the battery cell at 90W power, and the power management integrated circuit is controlled to charge the battery cell at 10W power.

[0142] When the current power supply is 120W, the first charge pump is controlled to charge the battery cell at 90W, and the power management integrated circuit is controlled to charge the battery cell at 30W.

[0143] Charging power allocation table

[0144] Current power supply The first charge pump distributes charging power. PMIC allocates charging power 90W 90W 0 100W 90W 10W 120W 90W 30W

[0145] It is understood that the embodiments of this disclosure allocate charging power to the first charge pump based on a preset power threshold, and allocate charging power to the power management integrated circuit based on differential power. That is, during the charging process of the battery cell, the power management integrated circuit participates in the charging portion exceeding the preset power threshold. In this way, the charging characteristics of the first charge pump can be maximized, thereby maximizing charging efficiency and achieving the best charging effect.

[0146] In some embodiments, the control circuit is configured to control the power management integrated circuit to charge the battery cell and control the first charge pump to stop charging the battery cell when the current charging current transmitted to the battery cell is less than a preset current threshold; and to continue controlling the first charge pump to charge the battery cell when the current charging current transmitted to the battery cell is greater than or equal to the preset current threshold.

[0147] In this embodiment of the disclosure, during the process of controlling the first charge pump to charge the battery cell, as the current power supply requested from the external device decreases, the corresponding current charging current transmitted to the battery cell will also gradually decrease.

[0148] It should be noted that after switching to the power management IC to charge the battery cells based on the decrease in the current charging current, the power management IC will continue to be used as the battery cells until charging is stopped.

[0149] For example, the preset current threshold can be set based on the maximum charging current of the power management integrated circuit, and the preset current threshold can be set to be less than or equal to the maximum charging current. Here, the preset current threshold can be between 1.5A and 3A. For example, the preset current threshold can be set to 2A.

[0150] It is understood that when the current charging current decreases to below a preset current threshold, the operation of the first charge pump can be directly switched to that of the power management integrated circuit, meaning the power management integrated circuit can operate independently. When the current charging current is greater than or equal to the preset current threshold, the first charge pump continues to operate. Thus, this embodiment of the present disclosure can, while achieving fast charging, switch to a more suitable device to charge the battery cell based on changes in the charging current during the charging process.

[0151] In some embodiments, such as Figure 5 As shown, the charge pump circuit includes:

[0152] The second charge pump 106 is connected to the first connection line between the charging interface 101 and the battery cell 102;

[0153] The third charge pump 107 is connected in series with the power management integrated circuit 104 in the second connection line between the charging interface 101 and the battery cell 102; the second connection line is connected in parallel with the first connection line.

[0154] A control circuit (not shown in the figure) is connected to the second charge pump 106 and the power management integrated circuit 104, and is used to control the second charge pump 106 and the power management integrated circuit 104 to charge the battery cell when the charging circuit is in fast charging mode.

[0155] In this embodiment of the disclosure, such as Figure 5 As shown, the charging circuit also includes a switching component S. This switching component can be disposed on the connection line between the charging interface 101 and the contact, which connects the third charge pump 107 and the second charge pump 106. By controlling the switching state of the switching component S, it is possible to more intelligently control whether to charge the battery cell.

[0156] It should be noted that the control circuit is also used to control the power management integrated circuit to charge the battery cells when the charging circuit is in non-fast charging mode. In this case, the second charge pump does not operate.

[0157] In this embodiment, the third charge pump is connected in series with the power management integrated circuit, and the third charge pump is connected in parallel with the second charge pump. Here, the second and third charge pumps are charge pumps with different functions. The second charge pump is used to charge the battery cell after stepping down the voltage, while the third charge pump is used to output the voltage to the voltage management integrated circuit after stepping down the voltage, so that the voltage management integrated circuit supporting low-voltage charging can work better.

[0158] It should be noted that the output voltage of the power management integrated circuit can be the same as the output voltage of the second charge pump. That is, the second charge pump and the power management integrated circuit can output the same voltage to charge the battery cell.

[0159] Here, the voltage output by the third charge pump needs to be greater than the voltage output by the second charge pump. This way, after voltage conversion by the power management integrated circuit, the power management integrated circuit can charge the battery cells at the same voltage as the second charge pump.

[0160] It should be noted that, for the same input voltage, the voltage output by the third charge pump needs to be greater than the voltage output by the second charge pump, and the step-down ratio of the third charge pump is less than that of the second charge pump.

[0161] In some embodiments, the second charge pump includes a 4:1 charge pump; the third charge pump includes a 4:2 charge pump.

[0162] For example, such as Figure 5 As shown, the current charging voltage transmitted by the charging interface is 20V. The voltage is converted to 10V by the third charge pump. Then, the 10V is converted to 5V by the power management integrated circuit. Finally, the power management integrated circuit outputs 5V to charge the battery cell.

[0163] In this embodiment of the disclosure, different power management integrated circuits support different charging voltages. Some power management integrated circuits support charging at voltages lower than a preset voltage, which can be called low-voltage charging PMICs (denoted as low-voltage PMICs); some power management integrated circuits support charging at voltages greater than or equal to the preset voltage, which can be called high-voltage charging PMICs (denoted as high-voltage PMIVs), such as PMICs that support 20V high-voltage charging.

[0164] Regarding the use of power management integrated circuits to support low-voltage charging, in related technologies, Figure 6 This is a schematic diagram of a conventional charging circuit according to an exemplary embodiment. Figure 3 .like Figure 6As shown, the low-voltage PMIC and two 4:1 charge pumps are connected in parallel between the charging interface 101 and the battery cell 102, and an overcurrent protection chip (OVP) is added to the pre-amplifier circuit of the low-voltage PMIC. When the charging circuit is in fast charging mode, the overcurrent protection chip disconnects the connection between the low-voltage PMIC and the charging interface, thus preventing the low-voltage PMIC from operating. However, while this charging method protects the low-voltage PMIC, it suffers from low utilization of the low-voltage PMIC.

[0165] Based on this, on the one hand, the embodiments of this disclosure propose to control the second charge pump and the power management integrated circuit to charge the battery cell, which can improve the charging speed and is applicable to high-power fast charging scenarios, such as 90W, 100W, 120W and other high-power fast charging scenarios.

[0166] On the other hand, this embodiment of the present disclosure connects a third charge pump in series in the front-end circuit of the power management integrated circuit. This allows the charging voltage transmitted through the charging interface to be stepped down by the third charge pump before being output to the power management integrated circuit. This lowers the voltage transmitted to the power management integrated circuit, enabling the power management integrated circuit, which supports low-voltage charging, to also power the battery cells in fast charging mode. This not only improves the utilization rate of the power management integrated circuit but also expands the applicable scenarios of the charging circuit, making it more universal.

[0167] For example, such as Figure 5 As shown, the third charge pump 107 may include a 4:2 charge pump, which is connected in series in the front-end circuit of the PMIC supporting low-voltage charging. This allows the current voltage transmitted from the charging interface to be reduced by half before being input to the PMIC for voltage conversion. Here, since the current output to the PMIC is relatively small, a lower-power charge pump can be selected for the 4:2 charge pump, thereby reducing both the footprint and material costs.

[0168] In some embodiments, the control circuit is configured to determine the product between the current voltage transmitted through the charging interface and the buck ratio of the third charge pump, and control the third charge pump to perform buck conversion if the current voltage difference between the product and a preset voltage threshold is greater than the current voltage of the battery cell; and control the third charge pump to be in pass-through mode if the current voltage difference is less than or equal to the current voltage of the battery cell.

[0169] In this embodiment of the disclosure, the step-down ratio of the third charge pump is the ratio between the output voltage and the input voltage of the third charge pump. For example, the third charge pump includes a 4:2 charge pump, corresponding to a step-down ratio of one-half.

[0170] It should be noted that the preset voltage threshold is determined based on the voltage difference between the input and output voltages required by the third charge pump. Here, the preset voltage threshold can be set equal to this voltage difference. For example, the preset voltage threshold can be set to 300mV.

[0171] In this embodiment of the disclosure, controlling the third charge pump to perform buck conversion includes controlling the third charge pump to perform buck conversion at the given buck ratio. Furthermore, when the third charge pump is in bypass mode, it means that the output terminal of the third charge pump is directly connected to the input terminal, or the function of the charge pump is bypassed, and buck conversion is no longer performed.

[0172] It should be noted that, considering that the current voltage transmitted by the charging interface in a non-fast charging scenario is less than the current voltage transmitted by the charging interface in a fast charging scenario, this embodiment of the present disclosure can determine the current difference voltage between the product and the preset voltage threshold when the charging circuit is in a non-fast charging mode; if the current difference voltage is greater than the current voltage of the battery cell, the third charge pump is controlled to perform a step-down conversion; if the current difference voltage is less than or equal to the current voltage of the battery cell, the third charge pump is controlled to be in a pass-through mode.

[0173] Here, when the charging circuit is in non-fast charging mode, the third charge pump can be controlled to either perform a step-down conversion or remain in direct charging mode based on the current voltage difference. Then, based on the voltage output by the third charge pump, the power management integrated circuit can be controlled to charge the battery cells.

[0174] Understandably, as charging continues, the current voltage transmitted through the charging interface will decrease, and the voltage output to the power management integrated circuit (IC) after being stepped down by the third charge pump will also decrease. Although a smaller voltage difference between the input and output voltages of the IC improves its conversion efficiency, the IC requires the input voltage to be higher than a preset voltage threshold to operate. Therefore, the third charge pump needs to be controlled in pass-through mode when the current voltage difference is less than or equal to the current voltage of the battery cell. This prevents the third charge pump from performing step-down conversion, allowing the power management IC to operate more efficiently.

[0175] This disclosure provides an electronic device that includes a charging circuit as described in one or more of the above embodiments.

[0176] It is understood that electronic devices include charging circuits. In the charging circuit, a power management integrated circuit (PMIC) is connected to both the charge pump circuit and the battery cell, and can work with the charge pump circuit to charge the battery cell, achieving fast charging. In other words, this embodiment of the present disclosure achieves fast charging by adding a power management integrated circuit, eliminating the need for multiple parallel charge pumps, thereby reducing material costs while achieving fast charging. Furthermore, compared to not using the PMIC during fast charging, this embodiment of the present disclosure integrates the PMIC to achieve fast charging of the battery cell, making fuller use of the PMIC's functionality and thus improving its utilization rate.

[0177] This disclosure also proposes a charging method. Figure 7 This is a flowchart illustrating a charging method according to an exemplary embodiment. Figure 1 .like Figure 7 As shown, this charging method is applied to the aforementioned electronic device, and the electronic device performs the charging method by including the following main steps:

[0178] S1001. Detect the charging mode of the charging circuit in the electronic device;

[0179] S1002. When the charging circuit is in fast charging mode, the charge pump circuit and power management integrated circuit in the charging circuit are controlled to charge the battery cells of the charging circuit simultaneously.

[0180] In this embodiment of the disclosure, when the electronic device is connected to an external device such as an adapter, a protocol handshake is performed with the adapter, and during the protocol handshake, information such as supported fast charging protocols and charging power is exchanged. If the charging power provided by the external device is greater than a preset power, and the adapter and the electronic device support the same fast charging protocol, then it can be determined that the charging circuit of the electronic device is in fast charging mode, and the power management integrated circuit and charge pump circuit in the charging circuit can be controlled to simultaneously charge the battery cells of the charging circuit.

[0181] It is understandable that in fast charging mode, the power management integrated circuit (PMIC) and the charge pump circuit work together to charge the battery cells to achieve fast charging. In other words, this embodiment of the present disclosure, by adding a power management integrated circuit for fast charging, eliminates the need for multiple parallel charge pumps, thereby reducing material costs while achieving fast charging. Furthermore, compared to not using the PMIC during fast charging, this embodiment of the present disclosure, by integrating the PMIC with the battery cells for fast charging, makes fuller use of the PMIC's functionality, thus improving its utilization rate.

[0182] In some embodiments, controlling the charge pump circuit and power management integrated circuit in the charging circuit to charge the battery cells of the charging circuit includes:

[0183] The control charge pump circuit includes a first charge pump and a power management integrated circuit to charge the battery cell;

[0184] or,

[0185] The control charge pump circuit includes a second charge pump and a power management integrated circuit to charge the battery cells.

[0186] It is understood that in this embodiment, the first charge pump is no longer connected in parallel with the power management integrated circuit (PMIC). Instead, voltage conversion is performed through the PMIC, allowing a portion of the voltage conversion work in the first charge pump to be replaced by the PMIC. This enables high-power charging through the first charge pump and the PMIC, thereby increasing charging speed. Furthermore, this embodiment does not require additional charge pumps for higher-power fast charging, reducing material costs while achieving fast charging and minimizing the space occupied by the charging circuit in the electronic device, thus improving space utilization. Additionally, compared to not using the PMIC during fast charging, this embodiment combines the PMIC with the battery cells for fast charging, making fuller use of the PMIC's functionality and improving its utilization rate.

[0187] Furthermore, by incorporating a third charge pump, the voltage delivered to the power management integrated circuit (IC) can be reduced, enabling the IC, which supports low-voltage charging, to power the battery cells even in fast-charging mode. This not only improves the utilization rate of the power management IC but also expands the applicable scenarios of the charging circuit, making it more universally applicable.

[0188] In some embodiments, the control charge pump circuit includes a first charge pump and a power management integrated circuit for charging the battery cell, including:

[0189] If the current power supplied through the charging interface is greater than a preset power threshold, the first charge pump and the power management integrated circuit are controlled to charge the battery cell.

[0190] When the current power supply is less than or equal to a preset power threshold, the first charge pump is controlled to charge the battery cell, and the power management integrated circuit is controlled to stop charging the battery cell.

[0191] It is understood that the embodiments of this disclosure not only achieve fast charging but also improve charging efficiency, achieving optimal charging results. Furthermore, when the current power supply is less than or equal to a preset power threshold, the power management integrated circuit stops charging the battery cells, meaning the first charge pump can be switched to independently fast charge the battery cells. Thus, compared to both the first charge pump and the power management integrated circuit operating simultaneously, the embodiments of this disclosure can reduce charging power consumption while simultaneously achieving fast charging.

[0192] In some embodiments, the method further includes:

[0193] If the current charging current transmitted to the battery cell is less than a preset current threshold, the power management integrated circuit is controlled to charge the battery cell, and the first charge pump is controlled to stop charging the battery cell.

[0194] If the current charging current transmitted to the battery cell is greater than or equal to a preset current threshold, the first charge pump continues to charge the battery cell.

[0195] It is understood that when the current charging current decreases to below a preset current threshold, the operation of the first charge pump can be directly switched to that of the power management integrated circuit, meaning the power management integrated circuit can operate independently. When the current charging current is greater than or equal to the preset current threshold, the first charge pump continues to operate. Thus, this embodiment of the present disclosure can, while achieving fast charging, switch to a more suitable device to charge the battery cell based on changes in the charging current during the charging process.

[0196] In some embodiments, controlling a first charge pump and a power management integrated circuit to charge the battery cell includes:

[0197] Obtain the power difference between the current power supply and the preset power threshold;

[0198] Control the first charge pump to charge the battery cells at a preset power threshold;

[0199] The power management integrated circuit controls the charging of the battery cells using differential power.

[0200] Understandably, considering that the maximum charging power supported by the first charge pump is a preset power threshold, and that the charging efficiency of the first charge pump is greater than that of the power management integrated circuit, it is proposed to control the first charge pump to charge the battery cells at the preset power threshold; and to control the power management integrated circuit to charge the battery cells at the differential power. In other words, during the charging process of the battery cells, the power management integrated circuit participates in the charging portion exceeding the preset power threshold. This maximizes the charging characteristics of the first charge pump, thereby maximizing charging efficiency and achieving the best charging effect.

[0201] In some embodiments, the method further includes:

[0202] Determine the product between the current voltage transmitted through the charging interface and the step-down ratio of the third charge pump;

[0203] If the current voltage difference between the product and the preset voltage threshold is greater than the current voltage of the battery cell, the third charge pump is controlled to perform a step-down conversion.

[0204] When the current differential voltage is less than or equal to the current voltage of the battery cell, the third charge pump is controlled to be in pass-through mode.

[0205] Understandably, in non-fast charging scenarios or as charging continues, the current voltage transmitted through the charging interface will decrease, and the voltage output to the power management integrated circuit (IC) after being stepped down by the third charge pump will also decrease. Although a smaller voltage difference between the input and output voltages of the IC improves its conversion efficiency, the IC requires the input voltage to be higher than a preset voltage threshold to function properly. Therefore, the third charge pump needs to be controlled in pass-through mode when the current voltage difference is less than or equal to the current voltage of the battery cell. This prevents the third charge pump from performing step-down conversion, allowing the power management IC to operate more efficiently.

[0206] In some embodiments, the method further includes:

[0207] When the charging circuit is in fast charging mode, the overvoltage protection circuit that is connected to the input terminal of the power management integrated circuit along with the first output terminal of the first charge pump is turned off.

[0208] When the charging circuit is in non-fast charging mode, the overvoltage protection circuit is activated, and the power management integrated circuit is controlled to charge the battery cells and to stop the first charge pump from working.

[0209] It is understood that the charging circuit of this disclosure embodiment can control different devices to charge the battery cells under different charging modes to adapt to different charging scenarios. Furthermore, the overvoltage protection circuit in this disclosure embodiment can provide protection when the charging circuit is in non-fast charging mode, reducing the possibility of device damage.

[0210] To better understand the charging method in one or more of the above embodiments, the following are examples of embodiments of this disclosure:

[0211] Figure 8 This is a flowchart illustrating a charging method according to an exemplary embodiment. Figure 2 .like Figure 8 As shown, the charging method for an electronic device includes the following steps:

[0212] S2001. Detect the charging mode of the charging circuit in the electronic device;

[0213] S2002. Determine if the charging mode is fast charging mode; if yes, proceed to step S2004; if no, proceed to step S2003.

[0214] S2003, Control power management integrated circuit to charge battery cells;

[0215] S2004. Obtain the current power supply transmitted by the charging interface;

[0216] S2005. Determine whether the current power supply is greater than the preset power threshold; if yes, proceed to step S2006; if no, proceed to step S2008.

[0217] S2006. Obtain the power difference between the current power supply and the preset power threshold.

[0218] S2007. Control the first charge pump to charge the battery cell with a preset power threshold, and control the power management integrated circuit to charge the battery cell with differential power.

[0219] S2008. Control the first charge pump to charge the battery cell, and control the power management integrated circuit to stop charging the battery cell;

[0220] S2009. Obtain the current charging current transmitted to the battery cell;

[0221] S2010. Determine whether the current charging current is less than the preset current threshold; if yes, proceed to step S2011; if no, proceed to step S2008.

[0222] S2011: Control the power management integrated circuit to charge the battery cell and control the first charge pump to stop charging the battery cell until charging is cut off.

[0223] It is understood that embodiments of this disclosure propose an application for Figure 2 The charging method of the charging circuit shown can perform voltage conversion through a power management integrated circuit, so that part of the voltage conversion work in the first charge pump can be replaced by the PMIC, thereby achieving high-power charging through the first charge pump and the PMIC to improve the charging speed.

[0224] Furthermore, since the battery cells can be quickly charged by combining with the PMIC, there is no need to increase the number of charge pumps. Therefore, not only is the material cost reduced and the space occupied decreased, but the functions of the PMIC can be made more fully, thereby improving the utilization rate of the PMIC.

[0225] In addition, by determining whether the current power supply is greater than the preset power threshold and whether the current charging current is less than the preset current threshold, it is possible to not only achieve more flexible charging control, but also improve the charging power and achieve the best charging effect.

[0226] Figure 9 This is a flowchart illustrating a charging method according to an exemplary embodiment. Figure 3 .like Figure 9 As shown, the charging method for an electronic device includes the following steps:

[0227] S3001. Detect the charging mode of the charging circuit in the electronic device;

[0228] S3002. Determine if the charging mode is fast charging mode; if yes, proceed to step S3003; if no, proceed to step S3004.

[0229] S3003 controls the second charge pump and power management integrated circuit to charge the battery cell;

[0230] S3004. Determine the product between the current voltage transmitted through the charging interface and the step-down ratio of the third charge pump, and the current voltage difference between the product and the preset voltage threshold.

[0231] S3005. Determine whether the current voltage difference is greater than the current voltage of the battery cell; if yes, proceed to step S3006; if no, proceed to step S3007.

[0232] S3006, Control the third charge pump to perform voltage reduction conversion;

[0233] S3007, Control the third charge pump to be in direct-flow mode;

[0234] S3008 controls the power management integrated circuit to charge the battery cells.

[0235] It is understood that embodiments of this disclosure propose an application for Figure 5 The charging method of the charging circuit shown enables the power management integrated circuit supporting low-voltage charging to charge the battery cells together with the second charge pump through a third charge pump in fast charging mode. Furthermore, controlling the third charge pump in non-fast charging mode reduces the voltage difference between the input and output voltages of the power management integrated circuit falling below a preset voltage threshold due to a decrease in the current voltage transmitted through the charging interface, thus allowing the power management integrated circuit to operate more effectively.

[0236] Regarding the charging methods in the above embodiments, the charging methods in each embodiment have been described in detail in the embodiments related to the charging circuit, and will not be elaborated here.

[0237] This disclosure also provides a charging device, which includes:

[0238] The detection module is configured to detect the charging mode of the charging circuit in the electronic device;

[0239] The control module is configured to control the charge pump circuit and the power management integrated circuit in the charging circuit to charge the battery cells of the charging circuit simultaneously when the charging circuit is in fast charging mode.

[0240] In some embodiments, the control module is further configured to control the first charge pump included in the charge pump circuit and the power management integrated circuit to charge the battery cell; or, to control the second charge pump included in the charge pump circuit and the power management integrated circuit to charge the battery cell.

[0241] In some embodiments, the control module is further configured to control the first charge pump and the power management integrated circuit to charge the battery cell when the current power supplied through the charging interface is greater than a preset power threshold.

[0242] If the current power supply is less than or equal to the preset power threshold, the first charge pump is controlled to charge the battery cell, and the power management integrated circuit is controlled to stop charging the battery cell.

[0243] In some embodiments, the apparatus further includes:

[0244] The first charging module is configured to control the power management integrated circuit to charge the battery unit and control the first charge pump to stop charging the battery unit when the current charging current transmitted to the battery unit is less than a preset current threshold.

[0245] The first charging module is configured to continue controlling the first charge pump to charge the battery cell when the current charging current transmitted to the battery cell is greater than or equal to the preset current threshold.

[0246] In some embodiments, the control module is further configured to acquire the power difference between the current power supply and the preset power threshold; control the first charge pump to charge the battery cell with the preset power threshold; and control the power management integrated circuit to charge the battery cell with the power difference.

[0247] In some embodiments, the apparatus further includes:

[0248] The third charging module is configured to determine the product between the current voltage transmitted through the charging interface and the buck ratio of the third charge pump; wherein the second connection line connecting the third charge pump to the power management integrated circuit is connected in parallel with the first connection line connecting the second charge pump; when the current voltage difference between the product and a preset voltage threshold is greater than the current voltage of the battery cell, the third charge pump is controlled to perform buck conversion; when the current voltage difference is less than or equal to the current voltage of the battery cell, the third charge pump is controlled to be in pass-through mode.

[0249] In some embodiments, the apparatus further includes:

[0250] The shutdown module is configured to shut down the overvoltage protection circuit, which is connected to the input terminal of the power management integrated circuit along with the first output terminal of the first charge pump, when the charging circuit is in the fast charging mode.

[0251] The startup module is configured to activate the overvoltage protection circuit and control the power management integrated circuit to charge the battery cell and stop the first charge pump when the charging circuit is in a non-fast charging mode.

[0252] Regarding the charging device in the above embodiments, the charging device in each embodiment has been described in detail in the embodiments related to the charging circuit, and will not be elaborated here.

[0253] Figure 10 This is a structural block diagram of an electronic device according to an exemplary embodiment. For example, the electronic device 1000 may be a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness equipment, personal digital assistant, etc.

[0254] Reference Figure 10The electronic device 1000 may include one or more of the following components: processing component 1002, memory 1004, power supply component 1006, multimedia component 1008, audio component 1010, input / output (I / O) interface 1012, sensor component 1014, and communication component 1016.

[0255] Processing component 1002 typically controls the overall operation of electronic device 1000, such as operations associated with at least one of display, telephone call, data communication, camera operation, and recording operation. Processing component 1002 may include one or more processors 1020 to execute instructions to perform all or part of the steps of the methods described above. Furthermore, processing component 1002 may include one or more modules to facilitate interaction between processing component 1002 and other components. For example, processing component 1002 may include a multimedia module to facilitate interaction between multimedia component 1008 and processing component 1002.

[0256] Memory 1004 is configured to store various types of data to support operation on electronic device 1000. Examples of such data include at least one of the following: instructions for any application or method operating on electronic device 1000, contact data, phonebook data, messages, pictures, and videos. Memory 1004 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0257] Power supply component 1006 provides power to various components of electronic device 1000. Power supply component 1006 may include at least one of the following: a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to electronic device 1000.

[0258] Multimedia component 1008 includes a screen that provides an output interface between electronic device 1000 and user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of touch or swipe actions but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 1008 includes a front-facing camera and / or a rear-facing camera. When electronic device 1000 is in an operating mode, such as a shooting mode or video mode, the front-facing camera and / or rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0259] Audio component 1010 is configured to output and / or input audio signals. For example, audio component 1010 includes a microphone (MIC) configured to receive external audio signals when electronic device 1000 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 1004 or transmitted via communication component 1016. In some embodiments, audio component 1010 also includes a speaker for outputting audio signals.

[0260] I / O interface 1012 provides an interface between processing component 1002 and peripheral interface modules, such as keyboards, click wheels, and buttons. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0261] Sensor assembly 1014 includes one or more sensors for providing state assessments of various aspects of electronic device 1000. For example, sensor assembly 1014 may detect the on / off state of electronic device 1000, the relative positioning of components (e.g., the display and keypad of electronic device 1000), changes in position of electronic device 1000 or one of its components, the presence or absence of user contact with electronic device 1000, orientation or acceleration / deceleration of electronic device 1000, and temperature changes of electronic device 1000. Sensor assembly 1014 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 1014 may also include an optical sensor, such as a complementary metal-oxide-semiconductor (CMOS) or charge-coupled device (CCD) image sensor, for use in imaging applications. In some embodiments, sensor assembly 1014 may also include, but is not limited to, at least one of the following: an accelerometer, a gyroscope, a magnetometer, a pressure sensor, and a temperature sensor.

[0262] Communication component 1016 is configured to facilitate wired or wireless communication between electronic device 1000 and other devices. Electronic device 1000 can access wireless networks based on communication standards, such as Wi-Fi, 4G, 5G, or combinations thereof. In one exemplary embodiment, communication component 1016 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 1016 also includes a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wide Band (UWB), Bluetooth (BT), and other technologies.

[0263] In an exemplary embodiment, the electronic device 1000 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components.

[0264] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 1004 including executable instructions or a computer program, which can be executed by the processor 1020 of the electronic device 1000 to perform the above-described method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), a compact disc read-only memory (CD-ROM), magnetic tape, floppy disk, and optical data storage device, etc.

[0265] A non-transitory computer-readable storage medium, when instructions in the storage medium are executed by a processor of an electronic device, enables the electronic device to perform any of the charging methods described above in the embodiments of this disclosure. For example, the method includes:

[0266] Detect the charging mode of the charging circuit in an electronic device;

[0267] When the charging circuit is in fast charging mode, the charge pump circuit and power management integrated circuit in the charging circuit are controlled to charge the battery cells of the charging circuit.

[0268] This disclosure provides a computer program product comprising a computer program or executable instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer program or executable instructions from the computer-readable storage medium and executes the computer program or executable instructions, causing the computer device to perform any of the charging methods described in this disclosure.

[0269] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the claims.

[0270] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A charging circuit, characterized in that, include: Charging port and battery unit; A charge pump circuit is connected to the charging interface and the battery cell; A power management integrated circuit is connected to the charge pump circuit and the battery cell; A control circuit, connected to the charge pump circuit and the power management integrated circuit, is at least used to control the charge pump circuit and the power management integrated circuit to charge the battery cell simultaneously when the charging circuit is in fast charging mode.

2. The charging circuit according to claim 1, characterized in that, The charge pump circuit includes a first charge pump; The input terminal of the first charge pump is connected to the charging interface; The first output terminal of the first charge pump is connected to the input terminal of the power management integrated circuit; The second output terminal of the first charge pump is connected to the battery cell; The output terminal of the power management integrated circuit is connected to the battery cell; The control circuit, connected to the first charge pump and the power management integrated circuit, is used to control the first charge pump and the power management integrated circuit to charge the battery cell when the charging circuit is in the fast charging mode.

3. The charging circuit according to claim 2, characterized in that, The charging circuit also includes an overvoltage protection circuit. The input terminal of the overvoltage protection circuit is connected to the charging interface; The output terminal of the overvoltage protection circuit and the first output terminal of the first charge pump are both connected to the input terminal of the power management integrated circuit. When the charging circuit is in the fast charging mode, the overvoltage protection circuit is turned off, and the first charge pump and the power management integrated circuit are controlled to charge the battery cell. When the charging circuit is in non-fast charging mode, the overvoltage protection circuit is activated, and the power management integrated circuit is controlled to charge the battery cell and the first charge pump is controlled to stop working.

4. The charging circuit according to claim 2, characterized in that, The control circuit is configured to, when the current power supply transmitted through the charging interface is greater than a preset power threshold, control the first charge pump and the power management integrated circuit to charge the battery cell; and when the current power supply is less than or equal to the preset power threshold, control the first charge pump to charge the battery cell and control the power management integrated circuit to stop charging the battery cell.

5. The charging circuit according to claim 4, characterized in that, The control circuit is configured to control the power management integrated circuit to charge the battery cell and control the first charge pump to stop charging the battery cell when the current charging current transmitted to the battery cell is less than a preset current threshold; and to continue controlling the first charge pump to charge the battery cell when the current charging current transmitted to the battery cell is greater than or equal to the preset current threshold.

6. The charging circuit according to claim 4, characterized in that, The control circuit is configured to obtain the power difference between the current power supply and the preset power threshold, allocate charging power to the first charge pump based on the preset power threshold, and allocate charging power to the power management integrated circuit based on the power difference.

7. The charging circuit according to claim 2, characterized in that, The first charge pump includes a 4:1 charge pump.

8. The charging circuit according to claim 1, characterized in that, The charge pump circuit includes: A second charge pump is connected to a first connection line between the charging interface and the battery cell; A third charge pump is connected in series with the power management integrated circuit in a second connection line between the charging interface and the battery cell; the second connection line is connected in parallel with the first connection line. The control circuit, connected to the second charge pump and the power management integrated circuit, is used to control the second charge pump and the power management integrated circuit to charge the battery cell when the charging circuit is in the fast charging mode.

9. The charging circuit according to claim 8, characterized in that, The control circuit is used to determine the product between the current voltage transmitted through the charging interface and the buck ratio of the third charge pump, and when the current voltage difference between the product and a preset voltage threshold is greater than the current voltage of the battery cell, it controls the third charge pump to perform buck conversion; when the current voltage difference is less than or equal to the current voltage of the battery cell, it controls the third charge pump to be in pass-through mode.

10. The charging circuit according to claim 8, characterized in that, The second charge pump includes a 4:1 charge pump; the third charge pump includes a 4:2 charge pump.

11. An electronic device, characterized in that, include: The charging circuit as described in any one of claims 1 to 10.

12. A charging method, characterized in that, include: Detect the charging mode of the charging circuit in an electronic device; When the charging circuit is in fast charging mode, the charge pump circuit and the power management integrated circuit in the charging circuit are controlled to charge the battery cells of the charging circuit simultaneously.

13. The method according to claim 12, characterized in that, The control of the charge pump circuit and power management integrated circuit in the charging circuit to simultaneously charge the battery cells of the charging circuit includes: The charge pump circuit, including a first charge pump and the power management integrated circuit, is used to charge the battery cell. or, The charge pump circuit, including the second charge pump and the power management integrated circuit, is used to charge the battery cell.

14. The method according to claim 13, characterized in that, The control circuit for the charge pump, including the first charge pump and the power management integrated circuit, charges the battery cell, including: If the current power supplied through the charging interface is greater than a preset power threshold, the first charge pump and the power management integrated circuit are controlled to charge the battery cell. If the current power supply is less than or equal to the preset power threshold, the first charge pump is controlled to charge the battery cell, and the power management integrated circuit is controlled to stop charging the battery cell.

15. The method according to claim 14, characterized in that, The method further includes: If the current charging current transmitted to the battery cell is less than a preset current threshold, the power management integrated circuit is controlled to charge the battery cell, and the first charge pump is controlled to stop charging the battery cell. If the current charging current transmitted to the battery cell is greater than or equal to the preset current threshold, the first charge pump continues to charge the battery cell.

16. The method according to claim 14, characterized in that, The step of controlling the first charge pump and the power management integrated circuit to charge the battery cell includes: Obtain the power difference between the current power supply and the preset power threshold; The first charge pump is controlled to charge the battery cell at the preset power threshold. The power management integrated circuit is controlled to charge the battery cell using the differential power.

17. The method according to claim 13, characterized in that, The method further includes: Determine the product between the current voltage transmitted through the charging interface and the step-down ratio of the third charge pump; wherein the second connection line connecting the third charge pump to the power management integrated circuit is connected in parallel with the first connection line connecting the second charge pump; If the current voltage difference between the product and the preset voltage threshold is greater than the current voltage of the battery cell, the third charge pump is controlled to perform a step-down conversion. When the current differential voltage is less than or equal to the current voltage of the battery cell, the third charge pump is controlled to be in pass-through mode.

18. The method according to claim 13, characterized in that, The method further includes: When the charging circuit is in the fast charging mode, the overvoltage protection circuit, which is connected to the input terminal of the power management integrated circuit along with the first output terminal of the first charge pump, is turned off. When the charging circuit is in non-fast charging mode, the overvoltage protection circuit is activated, and the power management integrated circuit is controlled to charge the battery cell and the first charge pump is controlled to stop working.

19. A charging device, characterized in that, include: The detection module is configured to detect the charging mode of the charging circuit in the electronic device; The control module is configured to control the charge pump circuit and the power management integrated circuit in the charging circuit to charge the battery cells of the charging circuit simultaneously when the charging circuit is in fast charging mode.

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