Power supply circuit, control method and device thereof and electronic equipment

Abstract

The invention discloses a power supply circuit, a control method and device thereof and electronic equipment, and belongs to the technical field of electronics. The power supply circuit comprises a series battery pack; the first end of the power management chip is connected with the positive electrode of the series battery pack, the second end of the power management chip is connected with the negative electrode of the series battery pack, and the third end of the power management chip is connected with the load circuit; the power management chip has a first operation mode and a second operation mode, the discharge power in the first operation mode is larger than the discharge power in the second operation mode, and the discharge current in the second operation mode is smaller than the discharge current in the first operation mode; when a first voltage difference between an input voltage and an output voltage of the power management chip is larger than or equal to a first threshold value, the power management chip works in a first operation mode, and when the first voltage difference is smaller than the first threshold value and is larger than or equal to a second threshold value, the power management chip works in a second operation mode.

Description

Technical Field

[0001] The present application belongs to the field of electronic technology, and specifically relates to a power supply circuit and a control method and device thereof, and an electronic device. Background Art

[0002] In the field of smart electronic devices, battery life has always been one of the most basic experiences that users pay the most attention to. With the development of power chips and silicon-carbon battery technology, dual-cell batteries have become the fast charging choice of many electronic device manufacturers due to their high efficiency and high charging power.

[0003] Among them, Figure 2 As shown, the dual-cell power supply architecture generally uses a Charge Pump power supply with very high conversion efficiency. Specifically, the output voltage of the dual-cell after the series connection is usually about 9V. The output voltage of the dual-cell is converted by a half-voltage IC (Integrated Circuit) chip, i.e., a charge pump, and then the SOC (System on a Chip) module, Network module, Speaker module, LCM (Liquid Crystal Module) module, and Camera Modules at the load end are powered by a PMIC (Power Management Integrated Circuit) chip, so as to achieve the purpose of reducing the dual-cell voltage to a single-cell voltage through a charge pump and then powering a single-cell-like system.

[0004] However, the charge pump is a kind of switching power supply, such as Figure 3 As shown in Figure 1, the power conversion efficiency of the charge pump will be low due to switching losses at light loads. In addition, lithium batteries have internal resistance, such as Figure 4 As shown in the figure, as the battery power is consumed, the battery voltage decreases, and the battery internal resistance also increases as the battery voltage decreases. When the battery voltage is in the low voltage range, the increase in battery internal resistance will cause a voltage drop at a large current. When the power supply voltage of the power management chip is lower than its minimum operating voltage, the system will be powered off and shut down. The high current under high-performance operation of electronic equipment cannot efficiently release the battery energy, and the actual discharge rate of the battery will be reduced. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a power supply circuit and a control method and device thereof, and an electronic device, which can improve the power conversion efficiency and battery discharge rate of a dual-battery power supply architecture.

[0006] In a first aspect, an embodiment of the present application provides a power supply circuit, comprising: a series battery group; a power management chip, wherein a first end of the power management chip is connected to the positive electrode of the series battery group, a second end of the power management chip is connected to the negative electrode of the series battery group, and a third end of the power management chip is connected to a load circuit; wherein the power management chip has a first operating mode and a second operating mode, the discharge power in the first operating mode is greater than the discharge power in the second operating mode, and the discharge current in the second operating mode is less than the discharge current in the first operating mode; when a first voltage difference between an input voltage and an output voltage of the power management chip is greater than or equal to a first threshold, the power management chip operates in the first operating mode, and when the first voltage difference is less than the first threshold and the first voltage difference is greater than or equal to the second threshold, the power management chip operates in the second operating mode.

[0007] In a second aspect, an embodiment of the present application provides a control method for a power supply circuit, which is applied to a power supply circuit such as the first aspect, and the control method includes: when a first voltage difference between an input voltage and an output voltage of the power management chip is greater than or equal to a first threshold, controlling the power management chip to operate in a first operating mode; when the first voltage difference is less than the first threshold and the first voltage difference is greater than or equal to a second threshold, controlling the power management chip to operate in a second operating mode; wherein the discharge power in the first operating mode is greater than the discharge power in the second operating mode, and the discharge current in the second operating mode is less than the discharge current in the first operating mode.

[0008] In a third aspect, an embodiment of the present application provides a control device for a power supply circuit, which is applied to a power supply circuit as in the first aspect, and the control device includes: a control unit, used to control the power management chip to operate in a first operating mode when a first voltage difference between an input voltage and an output voltage of the power management chip is greater than or equal to a first threshold; the control unit is also used to control the power management chip to operate in a second operating mode when the first voltage difference is less than the first threshold and the first voltage difference is greater than or equal to a second threshold; wherein the discharge power in the first operating mode is greater than the discharge power in the second operating mode, and the discharge current in the second operating mode is less than the discharge current in the first operating mode.

[0009] In a fourth aspect, an embodiment of the present application provides an electronic device, comprising: a power supply circuit as in the first aspect; and a load circuit connected to the power supply circuit.

[0010] In a fifth aspect, an embodiment of the present application provides an electronic device, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the programs or instructions are executed by the processor, the steps of the power supply circuit control method of the second aspect are implemented.

[0011] In a sixth aspect, an embodiment of the present application provides a readable storage medium having a program or instruction stored thereon, which, when executed by a processor, implements the steps of the power supply circuit control method of the second aspect.

[0012] In the seventh aspect, an embodiment of the present application provides a chip, which includes a processor and a communication interface, wherein the communication interface and the processor are coupled, and the processor is used to run programs or instructions to implement the steps of the power supply circuit control method as in the second aspect.

[0013] In an eighth aspect, an embodiment of the present application provides a computer program product, which is stored in a storage medium and is executed by at least one processor to implement the steps of the power supply circuit control method of the second aspect.

[0014] The power supply circuit provided in the embodiment of the present application includes a series battery pack and a power management chip. Among them, the first end of the power management chip is connected to the positive electrode of the series battery pack, the second end of the power management chip is connected to the negative electrode of the series battery pack, and the third end of the power management chip is connected to the load circuit. Further, the power management chip has a first operating mode and a second operating mode, the discharge power in the first operating mode is greater than the discharge power in the second operating mode, and the discharge current in the second operating mode is less than the discharge current in the first operating mode. Further, when the first voltage difference between the input voltage and the output voltage of the power management chip is greater than or equal to the first threshold, the power management chip operates in the first operating mode, and when the first voltage difference is less than the first threshold and the first voltage difference is greater than or equal to the second threshold, the power management chip operates in the second operating mode. Through the above-mentioned power supply circuit, a power management chip with a first operating mode and a second operating mode is designed, and when the first voltage difference of the power management chip is greater than or equal to the first threshold, it is made to operate in the first operating mode with a higher discharge power, and when the first voltage difference of the power management chip is less than the first threshold, it is made to operate in the second operating mode with a smaller discharge current. In this way, on the one hand, when the series battery pack operates in a high voltage area, the power management chip can be made to perform high-power discharge, thereby effectively improving the power conversion efficiency; on the other hand, when the series battery pack operates in a low voltage area, the battery's small current discharge characteristics can be utilized to effectively improve the battery discharge rate by making the power management chip perform small current discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a power supply circuit provided in an embodiment of the present application;

[0016] Figure 2 It is a schematic diagram of the structure of a dual-cell power supply architecture in the related art;

[0017] Figure 3is a graph showing the relationship between power conversion efficiency and load current in the related art;

[0018] Figure 4 A diagram showing the relationship between battery voltage and battery internal resistance in the related art;

[0019] Figure 5 A comparison diagram of discharge curves of graphite negative electrode batteries and silicon negative electrode batteries in related technologies;

[0020] Figure 6 One of the working flow diagrams of the power supply circuit provided in the embodiment of the present application;

[0021] Figure 7 The second working flow diagram of the power supply circuit provided in the embodiment of the present application;

[0022] Figure 8 The third working flow diagram of the power supply circuit provided in the embodiment of the present application;

[0023] Fig. 9 A schematic diagram of a flow chart of a method for controlling a power supply circuit provided in an embodiment of the present application;

[0024] Fig.10 A structural block diagram of a control device for a power supply circuit provided in an embodiment of the present application;

[0025] Fig.11 One of the structural block diagrams of the electronic device provided in the embodiment of the present application;

[0026] Fig.12 The second structural block diagram of the electronic device provided in the embodiment of the present application;

[0027] Fig.13 A schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application.

[0028] Figure 1 The reference numerals in the drawings are:

[0029] 100 power supply circuit, 102 series battery pack, 104 power management chip, 106 power storage device, 702 load circuit. DETAILED DESCRIPTION

[0030] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0031] The features of the terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0032] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] Combine the following Figure 1-Figure 13 The power supply circuit, control method and device thereof, and electronic device according to the embodiments of the present application are described in detail.

[0034] like Figure 1 As shown, an embodiment of the present application provides a power supply circuit 100 , wherein the power supply circuit 100 includes a series-connected battery pack 102 and a power management chip 104 .

[0035] The series battery pack 102 includes two batteries connected in series.

[0036] Furthermore, a first terminal of the power management chip 104 is connected to the positive electrode of the series battery group 102 , a second terminal of the power management chip 104 is connected to the negative electrode of the series battery group 102 , and a third terminal of the power management chip 104 is connected to the load circuit 702 .

[0037] Furthermore, the power management chip 104 has a first operating mode and a second operating mode.

[0038] The discharge power in the first operating mode is greater than the discharge power in the second operating mode, and the discharge current in the second operating mode is less than the discharge current in the first operating mode.

[0039] In actual application, the first operation mode may be specifically a charge pump high power discharge mode, and the second operation mode may be specifically a Buck trickle discharge mode.

[0040] During the operation of the power supply circuit 100, the power management chip 104 can collect voltage and current information at the battery end and the load end. Specifically, the power management chip 104 can collect its own input voltage V in and output voltage V a , and calculate the input voltage V in With the output voltage V aThe first pressure difference between the two modes is determined, and then according to the size of the first pressure difference, it is determined whether the system is at the optimal efficiency point, and switches between the first operating mode and the second operating mode.

[0041] It is understandable that if Figure 3 As shown, the power conversion efficiency is related to the load current. The power conversion efficiency is low when the load is light, and high when the load current is heavy, such as 50mA or more. The power conversion efficiency can be improved by controlling the load current to a larger value.

[0042] Therefore, the power supply circuit 100 provided in the embodiment of the present application has an input voltage V in and output voltage V a When the first voltage difference is greater than or equal to the first threshold, that is, when the series battery pack 102 operates in the high voltage area, the power management chip 104 will operate in the first operation mode, that is, the charge pump high power discharge mode, to achieve the modulation and voltage reduction of the battery voltage and perform high power discharge. In addition, based on the chip efficiency characteristic curve, the output current of the power management chip 104 will be maintained between 100mA and 300mA to ensure that the power management chip 104 operates at the optimal efficiency point. In this way, the power management chip 104 can continue to operate at a high efficiency point, effectively improving the power conversion efficiency.

[0043] Among them, the specific value of the first threshold can be set by those skilled in the art according to actual conditions. For example, the first threshold can be 6.4V, and no specific limitation is made here.

[0044] Furthermore, it is understandable that as the battery power is consumed, the battery voltage decreases, and the battery internal resistance will also increase as the battery voltage decreases. When the battery voltage is in the low voltage zone, the increase in the battery internal resistance will cause a large current voltage drop. When the power supply voltage of the power management chip is lower than its minimum operating voltage, it will cause the system to power off and shut down. The large current discharge cannot release the battery energy efficiently, and the actual discharge rate of the battery will decrease. On the contrary, when a small current is used for discharge, the voltage drop phenomenon of the battery in the low voltage zone can be effectively improved. In addition, the migration speed of lithium ions in a small current is slow, the consumption of active substances is relatively slow, and the actual available power of the battery increases. Therefore, a small current discharge can effectively increase the battery discharge rate.

[0045] Therefore, in the power supply circuit 100 provided in the embodiment of the present application, when the first voltage difference is less than the first threshold value and the first voltage difference is greater than or equal to the second threshold value, that is, when the series battery group 102 operates in the low voltage area, the power management chip 104 will operate in the second operating mode, namely, the Buck trickle discharge mode, to perform small current discharge, thereby utilizing the small current discharge characteristics of the battery to effectively improve the battery discharge rate.

[0046] In this way, the power supply circuit 100 provided in the embodiment of the present application can effectively improve the power conversion efficiency and the battery discharge rate, thereby improving the battery life and increasing the battery life.

[0047] Among them, the specific value of the second threshold can be set by those skilled in the art according to actual conditions. For example, the second threshold can be 5.0V, which is not specifically limited here.

[0048] Furthermore, the power management chip 104 may also collect temperature information of the series-connected battery pack 102 and detect the battery internal resistance based on the battery internal resistance-temperature characteristic curve.

[0049] Furthermore, in the actual application process, Figure 1 As shown, the load circuit 702 may specifically include a PMIC and a plurality of load modules. The power supply circuit 100 outputs a power supply voltage to the PMIC, and then the PMIC supplies power to each load module.

[0050] Among them, Figure 1 As shown, the above-mentioned load modules include but are not limited to SOC modules, Network modules, Speaker modules, LCM modules and Camera Modules, etc., and no specific limitation is made here.

[0051] Furthermore, if Figure 5 As shown, compared with silicon negative electrode batteries, due to the characteristics of electrode materials, the SOC (State Of Charge) of graphite negative electrode batteries in the low voltage area (2.5V to 3.8V) is higher, and the benefits of small current discharge are more significant. Therefore, in actual application, the batteries in the series battery group 102 can specifically use graphite negative electrode batteries, and no specific restrictions are made here.

[0052] In addition, in actual application, the series battery pack 102 can also be replaced by a parallel battery pack or a single-cell battery. That is, the power supply circuit 100 is not only applicable to the power supply scheme of dual batteries in series, but also to other power supply architecture schemes such as dual batteries in parallel and single-cell.

[0053] According to the power supply circuit 100 of the embodiment of the present application, it includes a series battery group 102 and a power management chip 104. Among them, the first end of the power management chip 104 is connected to the positive electrode of the series battery group 102, the second end of the power management chip 104 is connected to the negative electrode of the series battery group 102, and the third end of the power management chip 104 is connected to the load circuit 702. Further, the power management chip 104 has a first operating mode and a second operating mode, the discharge power in the first operating mode is greater than the discharge power in the second operating mode, and the discharge current in the second operating mode is less than the discharge current in the first operating mode. Further, when the first voltage difference between the input voltage and the output voltage of the power management chip 104 is greater than or equal to the first threshold, the power management chip 104 operates in the first operating mode, and when the first voltage difference is less than the first threshold and the first voltage difference is greater than or equal to the second threshold, the power management chip 104 operates in the second operating mode. Through the above power supply circuit 100, a power management chip 104 with a first operating mode and a second operating mode is designed, and when the first voltage difference of the power management chip 104 is greater than or equal to the first threshold, it is operated in the first operating mode with higher discharge power, and when the first voltage difference of the power management chip 104 is less than the first threshold, it is operated in the second operating mode with lower discharge current. In this way, on the one hand, when the series battery group 102 operates in a high voltage area, the power management chip 104 can be made to discharge at high power, thereby effectively improving the power conversion efficiency; on the other hand, when the series battery group 102 operates in a low voltage area, the characteristics of the battery's small current discharge can be utilized, and the power management chip 104 can be made to discharge at a small current, thereby effectively improving the battery discharge rate.

[0054] According to some embodiments of the present application, optionally, Figure 1 As shown, the power supply circuit 100 further includes a power storage device 106 .

[0055] The first end of the power storage device 106 is connected to the third end of the power management chip 104 , and the second end of the power storage device 106 is connected to the second end of the power management chip 104 .

[0056] During the operation of the power supply circuit 100 , the input voltage V in and output voltage V a When the first voltage difference is greater than or equal to the second threshold, the power management chip 104 determines whether the power storage device 106 meets the charging condition. Figure 1 As shown, the output current I of the power management chip 104 a A portion of the current is used as the charging current I0 to charge the power storage device 106, and the other portion is used as the power supply current I1 to be distributed to the load circuit 702 as needed to supply power to the load circuit 702 as needed.

[0057] The above charging conditions may specifically include: the output voltage V a The second voltage difference with the working voltage V0 of the power storage device 106 is greater than or equal to the third threshold, or the working voltage V0 of the power storage device 106 is less than the fourth threshold. When the power storage device 106 meets the above charging conditions, the power management chip 104 provides a charging voltage to the power storage device 106 to throttle the surplus power to the power storage device 106.

[0058] Among them, the specific value of the third threshold can be set by those skilled in the art according to actual conditions. For example, the third threshold can be 0.3V, and no specific limitation is made here.

[0059] Furthermore, for the specific value of the fourth threshold, those skilled in the art may set it according to actual conditions. For example, the fourth threshold may be 3.0V, which is not specifically limited here.

[0060] Furthermore, in actual application, the power storage device 106 may be a high-rate discharge battery or a large-capacity supercapacitor, which is not specifically limited herein.

[0061] In summary, if Figure 6 As shown, the working process of the power supply circuit 100 provided in the embodiment of the present application may specifically include the following S202 to S214:

[0062] S202: Determine whether the series-connected battery pack is operating in a high voltage region. If so, execute S204; if not, end the process.

[0063] S204: The power management chip operates in the first operation mode.

[0064] S206: The power management chip provides an output voltage V a , output current I a .

[0065] S208: Output current I a A portion of it is input to the PMIC as the supply current I1.

[0066] S210: Power each load module through the PMIC.

[0067] S212: Determine: If the power storage device meets the charging conditions, execute S214, if not, end the process.

[0068] S214: Output current I a A portion of it is used as charging current I0 to charge the power storage device.

[0069] Furthermore, if Figure 7As shown, the working process of the power supply circuit 100 provided in the embodiment of the present application may further include the following S302 to S314:

[0070] S302: Determine whether the series-connected battery pack is operating in a low voltage region. If so, execute S304; if not, end the process.

[0071] S304: The power management chip operates in the second operation mode.

[0072] S306: The power management chip provides an output voltage V a , output current I a .

[0073] S308: Output current I a A portion of it is input to the PMIC as the supply current I1.

[0074] S310: Power each load module through the PMIC.

[0075] S312: Determine: the power storage device meets the charging conditions. If so, execute S314. If not, end the process.

[0076] S314: Output current I a A portion of it is used as charging current I0 to charge the power storage device.

[0077] In addition, the power management chip 104 can also be used for shutdown control management. Specifically, the power management chip 104 can control whether the electronic device in which it is located enters shutdown based on parameters indicating the power supply status such as battery discharge rate, battery voltage and working voltage of the power storage device 106.

[0078] According to the power supply circuit 100 of the embodiment of the present application, it also includes a power storage device 106. Among them, the first end of the power storage device 106 is connected to the third end of the power management chip 104, and the second end of the power storage device 106 is connected to the second end of the power management chip 104. Further, when the second voltage difference between the output voltage of the power management chip 104 and the working voltage of the power storage device 106 is greater than or equal to the third threshold, or when the working voltage of the power storage device 106 is less than the fourth threshold, the power management chip 104 provides a charging voltage to the power storage device 106. In this way, while the load circuit 702 is powered on demand, the surplus power of the battery is throttled to the power storage device 106, so that the power storage device 106 can be used as a supplementary power source in the future to improve the endurance of the electronic device.

[0079] According to some embodiments of the present application, optionally, when the first voltage difference is less than the second threshold, the series-connected battery group 102 stops discharging.

[0080] At this time, the power management chip 104 will still work in the second operating mode and intelligently adjust the working voltage according to demand, so that the power storage device 106 can discharge as an independent power source, thereby continuing to power the load circuit 702, extending the battery life of the electronic device in the low voltage area, and avoiding the functional limitation of the battery in the low voltage area.

[0081] That is, if Figure 8 As shown, the working process of the power supply circuit 100 provided in the embodiment of the present application may further include the following S402 to S412:

[0082] S402: Determine: a first voltage difference between an input voltage and an output voltage of the power management chip is less than a second threshold value. If so, execute S404; if not, end the process.

[0083] S404: The power management chip operates in the second operation mode.

[0084] S406: The series-connected battery pack stops discharging.

[0085] S408: The power storage device discharges.

[0086] S410: The PMIC receives a supply current I1 input from a power storage device.

[0087] S412: Power each load module through the PMIC.

[0088] According to the power supply circuit 100 of the embodiment of the present application, when the first voltage difference is less than the second threshold value, the series battery group 102 stops discharging, the power management chip 104 operates in the second operation mode, and the power storage device 106 discharges to supply power to the load circuit 702. In this way, when the series battery group 102 cannot supply power, the power storage device 106 is used as a supplementary power source to continue to supply power to the load circuit 702, thereby extending the battery life of the electronic device in the low voltage area and avoiding the problem of functional limitation of the battery in the low voltage area.

[0089] According to some embodiments of the present application, optionally, Fig. 9 As shown, an embodiment of the present application further provides a control method for a power supply circuit, which is applied to the power supply circuit in any of the above embodiments. The control method may specifically include the following S502 and S504:

[0090] S502: When a first voltage difference between an input voltage and an output voltage of the power management chip is greater than or equal to a first threshold, control the power management chip to operate in a first operation mode.

[0091] The control method of the power supply circuit proposed in the embodiment of the present application is applied to the power supply circuit in any of the above embodiments, and the power supply circuit includes a series-connected battery pack and a power management chip.

[0092] The first operation mode may specifically be a charge pump high power discharge mode.

[0093] Furthermore, as to the specific value of the first threshold, those skilled in the art may set it according to actual conditions. For example, the first threshold mentioned above may be 6.4V, which is not specifically limited here.

[0094] Specifically, in the control method of the power supply circuit provided in the embodiment of the present application, during the operation of the power supply circuit, when the first voltage difference between the input voltage and the output voltage of the power management chip is greater than or equal to the first threshold, that is, when the series battery pack operates in the high voltage area, the power management chip is controlled to operate in the first operation mode, that is, the charge pump high power discharge mode, so as to achieve the modulation and voltage reduction of the battery voltage through the power management chip, and perform high power discharge. In this way, the power management chip can continuously operate at a high efficiency point, effectively improving the power conversion efficiency.

[0095] S504: When the first voltage difference is less than the first threshold and the first voltage difference is greater than or equal to the second threshold, control the power management chip to operate in the second operation mode.

[0096] The second operation mode may specifically be a Buck trickle discharge mode.

[0097] Furthermore, the discharge power in the first operating mode is greater than the discharge power in the second operating mode, and the discharge current in the second operating mode is less than the discharge current in the first operating mode.

[0098] Furthermore, the specific value of the second threshold can be set by those skilled in the art according to actual conditions. For example, the second threshold can be 5.0V, which is not specifically limited here.

[0099] Specifically, in the control method of the power supply circuit provided in the embodiment of the present application, during the operation of the power supply circuit, when the first voltage difference between the input voltage and the output voltage of the power management chip is less than the first threshold value, and the first voltage difference is greater than or equal to the second threshold value, that is, when the series battery group is operating in a low voltage area, the power management chip is controlled to operate in the second operating mode, namely, the Buck trickle discharge mode, so that the power management chip performs a small current discharge, thereby utilizing the small current discharge characteristics of the battery to effectively improve the battery discharge rate.

[0100] The control method of the power supply circuit provided in the embodiment of the present application controls the power management chip to work in the first operation mode when the first voltage difference between the input voltage and the output voltage of the power management chip is greater than or equal to the first threshold value; controls the power management chip to work in the second operation mode when the first voltage difference is less than the first threshold value and the first voltage difference is greater than or equal to the second threshold value; wherein the discharge power in the first operation mode is greater than the discharge power in the second operation mode, and the discharge current in the second operation mode is less than the discharge current in the first operation mode. Through the control method of the power supply circuit, when the series battery group works in the high voltage area, the power management chip is controlled to work in the first operation mode with higher discharge power, and when the series battery group works in the low voltage area, the power management chip is controlled to work in the second operation mode with smaller discharge current. In this way, on the one hand, when the series battery group works in the high voltage area, the power management chip can be made to discharge at high power to effectively improve the power conversion efficiency; on the other hand, when the series battery group works in the low voltage area, the characteristics of the battery's small current discharge can be utilized to effectively improve the battery discharge rate by making the power management chip discharge at a small current.

[0101] In the embodiment of the present application, the control method of the power supply circuit may further include the following S506:

[0102] S506: When the second voltage difference between the output voltage of the power management chip and the operating voltage of the power storage device in the power supply circuit is greater than or equal to the third threshold, or when the operating voltage of the power storage device is less than the fourth threshold, control the power management chip to provide a charging voltage to the power storage device.

[0103] Among them, the specific value of the third threshold can be set by those skilled in the art according to actual conditions. For example, the third threshold can be 0.3V, and no specific limitation is made here.

[0104] Furthermore, for the specific value of the fourth threshold, those skilled in the art may set it according to actual conditions. For example, the fourth threshold may be 3.0V, which is not specifically limited here.

[0105] Specifically, in the control method of the power supply circuit provided in the embodiment of the present application, during the operation of the power supply circuit, when the first voltage difference between the input voltage and the output voltage of the power management chip is greater than or equal to the second threshold, it is determined whether the power storage device meets the charging condition: the second voltage difference between the output voltage of the power management chip and the working voltage of the power storage device is greater than or equal to the third threshold, or the working voltage of the power storage device is less than the fourth threshold. When the power storage device meets the above charging conditions, the power management chip is controlled to provide a charging voltage to the power storage device to throttle the surplus power of the battery to the power storage device.

[0106] In the above-mentioned embodiment provided by the present application, when the second voltage difference between the output voltage of the power management chip and the working voltage of the power storage device in the power supply circuit is greater than or equal to the third threshold value, or when the working voltage of the power storage device is less than the fourth threshold value, the power management chip is controlled to provide a charging voltage to the power storage device. In this way, the surplus power of the battery is throttled to the power storage device, which facilitates the subsequent use of the power storage device as a supplementary power source to improve the endurance of the electronic device.

[0107] In an embodiment of the present application, when the first voltage difference is less than the second threshold value, the series-connected battery pack stops discharging, controls the power management chip to continue operating in the second operating mode, and controls the power storage device to discharge to power the load circuit.

[0108] Specifically, in the control method of the power supply circuit provided in the embodiment of the present application, when the first voltage difference is less than the second threshold value, the series battery pack will stop discharging. At this time, the control power management chip still works in the second operation mode, and intelligently adjusts the working voltage according to the demand, so that the power storage device discharges as an independent power supply, thereby continuing to supply power to the load circuit, extending the battery life of the electronic device in the low voltage area, and avoiding the function limitation problem of the battery in the low voltage area.

[0109] In the above embodiment provided by the present application, when the first voltage difference is less than the second threshold value, the series battery group stops discharging, controls the power management chip to continue to work in the second operation mode, and controls the power storage device to discharge to power the load circuit. In this way, when the series battery group cannot supply power, the power storage device is used as a supplementary power source to continue to supply power to the load circuit, extending the battery life of the electronic device in the low voltage area and avoiding the problem of functional limitation of the battery in the low voltage area.

[0110] The control method of the power supply circuit provided in the embodiment of the present application can be executed by a control device of the power supply circuit. In the embodiment of the present application, the control device of the power supply circuit provided in the embodiment of the present application is described by taking the control device of the power supply circuit executing the control method of the power supply circuit as an example.

[0111] like Fig.10 As shown, an embodiment of the present application provides a control device 600 for a power supply circuit, which is applied to the power supply circuit in any of the above embodiments. The control device 600 for the power supply circuit may include the following control unit 602.

[0112] The control unit 602 is used to control the power management chip to operate in a first operation mode when a first voltage difference between an input voltage and an output voltage of the power management chip is greater than or equal to a first threshold;

[0113] The control unit 602 is further configured to control the power management chip to operate in the second operation mode when the first voltage difference is less than the first threshold value and the first voltage difference is greater than or equal to the second threshold value;

[0114] The discharge power in the first operating mode is greater than the discharge power in the second operating mode, and the discharge current in the second operating mode is less than the discharge current in the first operating mode.

[0115] The control device 600 of the power supply circuit provided in the embodiment of the present application controls the power management chip to work in the first operation mode when the first voltage difference between the input voltage and the output voltage of the power management chip is greater than or equal to the first threshold value; controls the power management chip to work in the second operation mode when the first voltage difference is less than the first threshold value and the first voltage difference is greater than or equal to the second threshold value; wherein the discharge power in the first operation mode is greater than the discharge power in the second operation mode, and the discharge current in the second operation mode is less than the discharge current in the first operation mode. Through the control device 600 of the power supply circuit, when the series battery group works in the high voltage area, the power management chip is controlled to work in the first operation mode with higher discharge power, and when the series battery group works in the low voltage area, the power management chip is controlled to work in the second operation mode with smaller discharge current. In this way, on the one hand, when the series battery group works in the high voltage area, the power conversion efficiency can be effectively improved by making the power management chip perform high power discharge; on the other hand, when the series battery group works in the low voltage area, the battery discharge rate can be effectively improved by making the power management chip perform small current discharge by utilizing the characteristics of small current discharge of the battery.

[0116] In an embodiment of the present application, the control unit 602 is also used to: when the second voltage difference between the output voltage of the power management chip and the operating voltage of the power storage device in the power supply circuit is greater than or equal to the third threshold, or when the operating voltage of the power storage device is less than the fourth threshold, control the power management chip to provide a charging voltage to the power storage device.

[0117] In the above-mentioned embodiment provided by the present application, when the second voltage difference between the output voltage of the power management chip and the working voltage of the power storage device in the power supply circuit is greater than or equal to the third threshold value, or when the working voltage of the power storage device is less than the fourth threshold value, the power management chip is controlled to provide a charging voltage to the power storage device. In this way, the surplus power of the battery is throttled to the power storage device, which facilitates the subsequent use of the power storage device as a supplementary power source to improve the endurance of the electronic device.

[0118] In an embodiment of the present application, the control unit 602 is also used to: when the first voltage difference is less than the second threshold, the series battery pack stops discharging, controls the power management chip to operate in the second operating mode, and controls the power storage device to discharge to power the load circuit.

[0119] In the above embodiment provided by the present application, when the first voltage difference is less than the second threshold value, the series battery group stops discharging, controls the power management chip to continue to work in the second operation mode, and controls the power storage device to discharge to power the load circuit. In this way, when the series battery group cannot supply power, the power storage device is used as a supplementary power source to continue to supply power to the load circuit, extending the battery life of the electronic device in the low voltage area and avoiding the problem of functional limitation of the battery in the low voltage area.

[0120] The control device 600 of the power supply circuit in the embodiment of the present application can be an electronic device, or a component in the electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal, or other devices other than a terminal. Exemplarily, the electronic device can be a mobile phone, a tablet computer, a laptop computer, a PDA, a vehicle-mounted electronic device, a mobile Internet device (Mobile Internet Device, MID), an augmented reality (augmented reality, AR) / virtual reality (virtual reality, VR) device, a robot, a wearable device, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a netbook or a personal digital assistant (personal digital assistant, PDA), etc., and can also be a server, a network attached storage (Network Attached Storage, NAS), a personal computer (personal computer, PC), a television (television, TV), a teller machine or a self-service machine, etc., which is not specifically limited in the embodiment of the present application.

[0121] The control device 600 of the power supply circuit in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system, an iOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0122] The control device 600 of the power supply circuit provided in the embodiment of the present application can realize Fig. 9 To avoid repetition, the various processes implemented by the method embodiment are not described here.

[0123] Alternatively, if Fig.11 As shown, the embodiment of the present application further provides an electronic device 700. The electronic device 700 includes the power supply circuit 100 and the load circuit 702 in any of the above embodiments.

[0124] The load circuit 702 is connected to the power supply circuit 100 .

[0125] The electronic device 700 provided in the embodiment of the present application includes the power supply circuit 100 in any of the above embodiments and can achieve the same technical effect. To avoid repetition, it will not be described here.

[0126] In actual application, the electronic device 700 may be a smart phone, a tablet computer, a laptop computer, a smart watch, or other electronic product that needs to be powered by a battery.

[0127] Alternatively, if Fig.12 As shown, an embodiment of the present application also provides an electronic device 800, including a processor 802 and a memory 804, wherein the memory 804 stores programs or instructions that can be executed on the processor 802, and when the program or instructions are executed by the processor 802, the various steps of the control method embodiment of the above-mentioned power supply circuit are implemented, and the same technical effect can be achieved. To avoid repetition, they are not described here.

[0128] It should be noted that the electronic devices in the embodiments of the present application include the above-mentioned mobile electronic devices and non-mobile electronic devices.

[0129] Fig.13 A schematic diagram of the hardware structure of an electronic device to implement an embodiment of the present application.

[0130] The electronic device 900 includes but is not limited to: a radio frequency unit 901, a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 908, a memory 909, a processor 910 and other components.

[0131] Those skilled in the art will appreciate that the electronic device 900 may also include a power source (such as a battery) for supplying power to each component, and the power source may be logically connected to the processor 910 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig.13 The electronic device structure shown in the figure does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0132] The processor 910 is used to control the power management chip to operate in a first operating mode when a first voltage difference between an input voltage and an output voltage of the power management chip is greater than or equal to a first threshold.

[0133] The processor 910 is further configured to control the power management chip to operate in the second operating mode when the first voltage difference is less than the first threshold and the first voltage difference is greater than or equal to the second threshold.

[0134] The discharge power in the first operating mode is greater than the discharge power in the second operating mode, and the discharge current in the second operating mode is less than the discharge current in the first operating mode.

[0135] In the embodiment of the present application, when the first voltage difference between the input voltage and the output voltage of the power management chip is greater than or equal to the first threshold, the power management chip is controlled to work in the first operation mode; when the first voltage difference is less than the first threshold and the first voltage difference is greater than or equal to the second threshold, the power management chip is controlled to work in the second operation mode; wherein the discharge power in the first operation mode is greater than the discharge power in the second operation mode, and the discharge current in the second operation mode is less than the discharge current in the first operation mode. In the embodiment of the present application, when the series battery group works in the high voltage area, the power management chip is controlled to work in the first operation mode with higher discharge power, and when the series battery group works in the low voltage area, the power management chip is controlled to work in the second operation mode with smaller discharge current. In this way, on the one hand, when the series battery group works in the high voltage area, the power management chip can be made to perform high power discharge to effectively improve the power conversion efficiency; on the other hand, when the series battery group works in the low voltage area, the battery discharge rate can be effectively improved by making the power management chip perform low current discharge by utilizing the characteristics of small current discharge of the battery.

[0136] Optionally, the processor 910 is also used to: control the power management chip to provide a charging voltage to the power storage device when a second voltage difference between the output voltage of the power management chip and the operating voltage of the power storage device in the power supply circuit is greater than or equal to a third threshold, or when the operating voltage of the power storage device is less than a fourth threshold.

[0137] In the above-mentioned embodiment provided by the present application, when the second voltage difference between the output voltage of the power management chip and the working voltage of the power storage device in the power supply circuit is greater than or equal to the third threshold value, or when the working voltage of the power storage device is less than the fourth threshold value, the power management chip is controlled to provide a charging voltage to the power storage device. In this way, the surplus power of the battery is throttled to the power storage device, which facilitates the subsequent use of the power storage device as a supplementary power source to improve the endurance of the electronic device.

[0138] Optionally, the processor 910 is further configured to: when the first voltage difference is less than a second threshold, stop the series battery pack from discharging, control the power management chip to operate in a second operating mode, and control the power storage device to discharge to power the load circuit.

[0139] In the above embodiment provided by the present application, when the first voltage difference is less than the second threshold value, the series battery group stops discharging, controls the power management chip to continue to work in the second operation mode, and controls the power storage device to discharge to power the load circuit. In this way, when the series battery group cannot supply power, the power storage device is used as a supplementary power source to continue to supply power to the load circuit, extending the battery life of the electronic device in the low voltage area and avoiding the problem of functional limitation of the battery in the low voltage area.

[0140] It should be understood that in the embodiment of the present application, the input unit 904 may include a graphics processor (Graphics Processing Unit, GPU) 9041 and a microphone 9042, and the graphics processor 9041 processes the image data of the static picture or video obtained by the image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 906 may include a display panel 9061, and the display panel 9061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 907 includes a touch panel 9071 and at least one of other input devices 9072. The touch panel 9071 is also called a touch screen. The touch panel 9071 may include two parts: a touch detection device and a touch controller. Other input devices 9072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0141] The memory 909 can be used to store software programs and various data. The memory 909 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instructions required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 909 may include a volatile memory or a non-volatile memory, or the memory 909 may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 909 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0142] The processor 910 may include one or more processing units; optionally, the processor 910 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 910.

[0143] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the control method embodiment of the above-mentioned power supply circuit is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0144] The processor is the processor in the electronic device in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

[0145] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface and the processor are coupled, and the processor is used to run programs or instructions to implement the various processes of the control method embodiment of the above-mentioned power supply circuit, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0146] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0147] An embodiment of the present application provides a computer program product, which is stored in a storage medium. The program product is executed by at least one processor to implement the various processes of the control method embodiment of the power supply circuit as described above, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0148] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0149] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods of each embodiment of the present application.

[0150] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A power supply circuit, characterized in that: include: Series connected battery packs; A power management chip, wherein a first end of the power management chip is connected to the positive electrode of the series-connected battery pack, a second end of the power management chip is connected to the negative electrode of the series-connected battery pack, and a third end of the power management chip is connected to a load circuit; The power management chip has a first operating mode and a second operating mode, the discharge power in the first operating mode is greater than the discharge power in the second operating mode, and the discharge current in the second operating mode is less than the discharge current in the first operating mode; When the first voltage difference between the input voltage and the output voltage of the power management chip is greater than or equal to a first threshold, the power management chip operates in the first operating mode; when the first voltage difference is less than the first threshold and the first voltage difference is greater than or equal to a second threshold, the power management chip operates in the second operating mode.

2. The power supply circuit according to claim 1, characterized in that: Also includes: A power storage device, wherein a first end of the power storage device is connected to a third end of the power management chip, and a second end of the power storage device is connected to a second end of the power management chip; In which, when the second voltage difference between the output voltage of the power management chip and the operating voltage of the power storage device is greater than or equal to a third threshold, or when the operating voltage of the power storage device is less than a fourth threshold, the power management chip provides a charging voltage to the power storage device.

3. The power supply circuit according to claim 2, characterized in that: When the first voltage difference is less than the second threshold, the series-connected battery group stops discharging, the power management chip operates in the second operating mode, and the power storage device discharges to supply power to the load circuit.

4. A control method for a power supply circuit, characterized in that: Applied to the power supply circuit according to any one of claims 1 to 3, the control method comprises: When a first voltage difference between an input voltage and an output voltage of the power management chip is greater than or equal to a first threshold, controlling the power management chip to operate in the first operation mode; When the first voltage difference is less than the first threshold value and the first voltage difference is greater than or equal to a second threshold value, controlling the power management chip to operate in the second operation mode; The discharge power in the first operating mode is greater than the discharge power in the second operating mode, and the discharge current in the second operating mode is less than the discharge current in the first operating mode.

5. The control method according to claim 4, characterized in that: Also includes: When the second voltage difference between the output voltage of the power management chip and the operating voltage of the power storage device in the power supply circuit is greater than or equal to a third threshold, or when the operating voltage of the power storage device is less than a fourth threshold, the power management chip is controlled to provide a charging voltage to the power storage device.

6. The control method according to claim 5, characterized in that: Also includes: When the first voltage difference is less than the second threshold, the series-connected battery group stops discharging, controls the power management chip to operate in the second operating mode, and controls the power storage device to discharge to supply power to the load circuit.

7. A control device for a power supply circuit, characterized in that: Applied to the power supply circuit according to any one of claims 1 to 3, the control device comprises: a control unit, configured to control the power management chip to operate in the first operation mode when a first voltage difference between an input voltage and an output voltage of the power management chip is greater than or equal to a first threshold; The control unit is further configured to control the power management chip to operate in the second operation mode when the first voltage difference is less than the first threshold and the first voltage difference is greater than or equal to a second threshold; The discharge power in the first operating mode is greater than the discharge power in the second operating mode, and the discharge current in the second operating mode is less than the discharge current in the first operating mode.

8. The control device according to claim 7, characterized in that: The control unit is also used for: When the second voltage difference between the output voltage of the power management chip and the operating voltage of the power storage device in the power supply circuit is greater than or equal to a third threshold, or when the operating voltage of the power storage device is less than a fourth threshold, the power management chip is controlled to provide a charging voltage to the power storage device.

9. The control device according to claim 8, characterized in that: The control unit is also used for: When the first voltage difference is less than the second threshold, the series-connected battery group stops discharging, controls the power management chip to operate in the second operating mode, and controls the power storage device to discharge to supply power to the load circuit.

10. An electronic device, characterized in that: include: The power supply circuit according to any one of claims 1 to 3; The load circuit is connected to the power supply circuit.

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