Power supply circuit and electronic device

Abstract

The present application provides a power supply circuit and an electronic device, for use in improving the battery life of electronic devices. The power supply circuit comprises: a battery module, comprising at least one power supply branch, each power supply branch comprising a first battery cell and a second battery cell, and a negative electrode of the first battery cell in each power supply branch being connected to a positive electrode of the second battery cell; a first voltage converter, having an input end connected to a positive electrode of the first battery cell and an output end connected to a first load, and used for converting a first battery voltage into a first utilization voltage; and a second voltage converter, having an input end connected to the positive electrode of the second battery cell and an output end connected to a second load, and used for converting a second battery voltage into a second utilization voltage, wherein a first absolute difference value between the second battery voltage and the second utilization voltage is smaller than a second absolute difference value between the first battery voltage and the second utilization voltage.

Description

Power supply circuit and electronic device

[0001] The present application claims priority to the Chinese patent application No. 202410238839.2, filed on March 4, 2024, entitled "Power supply circuit and electronic device", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of electronic devices, and in particular to a power supply circuit and an electronic device. BACKGROUND

[0003] For electronic devices such as notebook computers, in order to ensure normal operation, the battery module in the electronic device needs to provide power support for each component of the electronic device.

[0004] At present, the power utilization efficiency of the power supply scheme of electronic devices such as notebook computers is low, which affects the battery endurance of the electronic device. SUMMARY

[0005] In order to solve the above technical problems, the present application provides a power supply circuit and an electronic device, which can improve the battery endurance of the electronic device.

[0006] In a first aspect, the present application provides a power supply circuit applied to an electronic device, the power supply circuit comprising a battery module, a first voltage converter and a second voltage converter. The battery module comprises at least one power supply branch, each power supply branch comprising a first battery cell and a second battery cell, wherein the negative electrode of the first battery cell and the positive electrode of the second battery cell in each power supply branch are connected, the positive electrode of the first battery cell is used to output a first battery voltage, and the positive electrode of the second battery cell is used to output a second battery voltage; the input end of the first voltage converter is connected with the positive electrode of the first battery cell, the output end of the first voltage converter is connected with a first load, the first voltage converter is used to convert the first battery voltage into a first power consumption voltage and output the first power consumption voltage to the first load; the input end of the second voltage converter is connected with the positive electrode of the second battery cell, the output end of the second voltage converter is connected with a second load, the second voltage converter is used to convert the second battery voltage into a second power consumption voltage and output the second power consumption voltage to the second load, wherein the first absolute difference between the second battery voltage and the second power consumption voltage is less than the second absolute difference between the first battery voltage and the second power consumption voltage.

[0007] Through the power supply circuit, the voltage difference between the second voltage converter is the first absolute difference, compared with the scheme that the input end of the second voltage converter is connected to the positive electrode of the first battery cell (at this time the voltage difference between the second voltage converter is the second absolute difference), since the first absolute difference is less than the second absolute difference, and the working efficiency of the second voltage converter is inversely proportional to the voltage difference between the two ends, through the power supply circuit of the embodiment of the application, the working efficiency of the second voltage converter is improved, the voltage loss of the second voltage converter to the battery module is reduced, the voltage utilization rate of the battery module is improved, and the battery endurance of the electronic equipment is improved.

[0008] Exemplarily, the battery module can include m power supply branches, and each power supply branch includes n battery cells connected in series. Wherein, m is an integer greater than or equal to 1, and n is an integer greater than or equal to 2. Wherein, on each branch, the negative electrode of the i th battery cell is connected to the positive electrode of the i+1 th battery cell, and i is any positive integer less than n. And in the case of m greater than or equal to 2, the positive electrode of the j th battery cell on each branch is connected in series, and j is any positive integer less than or equal to n.

[0009] In one example, in a branch of the battery module, only the first battery cell and the second battery cell can be included, such as the battery module can include one branch, and the branch includes two first battery cells P1-second battery cells P2 connected in series, that is, "2 in series 1 in parallel". For example, the battery module can include two branches, and each branch includes two first battery cells P1-second battery cells P2 connected in series, that is, "2 in series 2 in parallel".

[0010] In another example, in a branch of the battery module, other battery cells in addition to the first battery cell and the second battery cell can also be included, such as, as shown in FIG. 7, a branch includes four first battery cells P1-fourth battery cells P4 connected in series, that is, "4 in series 1 in parallel". For example, as shown in FIG. 10, the battery module can include one branch, and the branch includes three first battery cells P1-third battery cells P3 connected in series, that is, "3 in series 1 in parallel".

[0011] Exemplarily, the first voltage converter can be a voltage converter connected to the positive electrode of the first battery cell, such as a BUCK, BOOST or BUCK-BOOST converter. For example, in the electronic device shown in FIG. 7, the first voltage converter can include a first BUCK-BOOST converter 127 and a first BUCK 121. For example, the first voltage converter can be a first BOOST 128, a first BUCK 121, a second BUCK-BOOST converter 129, a fourth BUCK 124 and a fifth BUCK 125 in the electronic devices shown in FIG. 8 and FIG. 9. For example, the first voltage converter can be a sixth BUCK 126, a first BUCK-BOOST converter 127 and a first BUCK 121 in the electronic device shown in FIG. 10.

[0012] Exemplarily, the second voltage converter can be a voltage converter connected to the positive pole of the second battery cell, such as the sixth BUCK 126 in FIG. 7; the second BUCK 122 and the third BUCK 123 in FIGS. 8 and 9; the fourth BUCK 124 and the fifth BUCK 125 in FIG. 10.

[0013] Exemplarily, the first load can be a power load connected to the first voltage converter, such as the first load 131 in the present application.

[0014] Exemplarily, the second load can be a power load connected to the second voltage converter, such as the second load 132 in the present application.

[0015] Exemplarily, the first battery voltage can be the voltage of the positive pole of the first battery cell. For example, the first battery voltage Vout1 in the present application. The second battery voltage can be the voltage of the positive pole of the second battery cell. For example, the second battery voltage Vout2 in the present application. In the case of including two series battery cells in one branch, if the voltage of one battery cell varies in the range of 3V-4.5V, the voltage of the first battery voltage Vout1 can vary in the range of 6V-9V, and the voltage of the second battery voltage Vout2 can vary in the range of 3V-4.5V. In the case of including three series battery cells in one branch, if the voltage of one battery cell varies in the range of 3V-4.5V, the voltage of the first battery voltage Vout1 can vary in the range of 9V-13.5V, and the voltage of the second battery voltage Vout2 can vary in the range of 6V-9V. In the case of including four series battery cells in one branch, if the voltage of one battery cell varies in the range of 3V-4.5V, the voltage of the first battery voltage Vout1 can vary in the range of 12V-18V, and the voltage of the second battery voltage Vout2 can vary in the range of 9V-13.5V.

[0016] Exemplarily, the second voltage converter can include a first buck converter, and the second power voltage can be less than the minimum voltage value of the second battery voltage. For example, in the case of the voltage of the second battery voltage Vout2 varying in the range of 3V-4.5V, the second power voltage can be less than 3V.

[0017] Exemplarily, the first voltage converter can be determined according to the size relationship between the power-on voltage of the connected first load and the first battery voltage. For example, in the case where the power-on voltage of the first load is greater than the maximum voltage value of the first battery voltage, the first voltage converter can be a boost converter (BOOST); in the case where the power-on voltage of the first load is less than the minimum voltage value of the first battery voltage, the first voltage converter can be a buck converter (BUCK); and in the case where the power-on voltage of the first load is greater than or equal to the minimum value of the first battery voltage and less than or equal to the maximum value of the first battery voltage, the first voltage converter can be a buck-boost converter (BUCK-BOOST).

[0018] For the first load 131, if the power-on voltage thereof is less than the minimum voltage value of the first battery voltage, it can be a power-on load whose power-on voltage is less than the minimum voltage value of the first battery voltage and greater than or equal to the minimum voltage value of the second battery voltage. Alternatively, it can also be a load with large peak current and high dynamic response, such as a CPU core, a GPU core, an NPU core, etc., which has large load current and low supply voltage.

[0019] Exemplarily, the electronic device can be a terminal device. For example, the electronic device can be a notebook computer. For example, a light and thin notebook computer adopting a power supply scheme of “2 in series and 1 in parallel” or “2 in series and 2 in parallel”.

[0020] According to the first aspect, each power supply branch further includes a third electrode, wherein the positive electrode of the third electrode is connected with the negative electrode of the second electrode, and the positive electrode of the third electrode is used for outputting a third battery voltage; the power supply circuit further includes: a third voltage converter, an input end of the third voltage converter is connected with the positive electrode of the third electrode, an output end of the third voltage converter is connected with a third load, and the third voltage converter is used for converting the third battery voltage into a third power-on voltage and outputting the third power-on voltage to the third load, wherein a third absolute difference between the third battery voltage and the third power-on voltage is less than a fourth absolute difference between the first battery voltage and the third power-on voltage.

[0021] In this way, when the electronic device includes the third voltage converter, the input end of the third voltage converter is connected with the positive electrode of the third electrode, thereby further reducing the voltage difference between the input end and the output end of the third voltage converter, improving the working efficiency of the third voltage converter, and further improving the battery endurance of the electronic device.

[0022] Exemplarily, the third electric core can be the third electric core P3 in FIG. 10. Correspondingly, the third voltage converter can include the second BUCK 122 and the third BUCK 123. The variation range of the third battery voltage can be 3-4.5V. Exemplarily, the third electric core can be the third electric core P3 in FIG. 7. Correspondingly, the third voltage converter can include the fourth BUCK 124 and the fifth BUCK 125. The variation range of the third battery voltage can be 6-9V.

[0023] Exemplarily, the electronic device can be a notebook computer. For example, the notebook computer adopting the power supply scheme of "3 series 1 parallel" can be a notebook computer other than a light and thin notebook computer and a performance notebook computer. For example, the performance requirement thereof can be between that of the light and thin notebook computer and the performance notebook computer.

[0024] According to the first aspect, or any one of the implementations of the first aspect, the second voltage converter includes a first step-down converter, and the second power consumption voltage is less than a minimum voltage value of the second battery voltage and greater than or equal to a minimum voltage value of the third battery voltage.

[0025] The third voltage converter includes a second step-down converter, and the third power consumption voltage is less than a minimum voltage value of the third battery voltage.

[0026] In this way, the power consumption voltages for the second load and the third load can be provided by the step-down converters, and the circuit cost is reduced. In addition, the first step-down converter and the second step-down converter can be connected to the electric core that makes the working efficiency thereof highest, and the working efficiency of the first step-down converter and the second step-down converter is further improved, and the battery endurance of the electronic device is further improved.

[0027] Exemplarily, taking the electronic device shown in FIG. 10 as an example, the first step-down converter can be a step-down converter connected to the positive electrode of the second electric core, such as the fourth BUCK 124 and the fifth BUCK 125. The second step-down converter can be a step-down converter connected to the positive electrode of the third electric core, such as the second BUCK 122 and the third BUCK 123. At this time, the value range of the second power consumption voltage is [3V, 6V), and the value range of the third power consumption voltage is (0, 3V).

[0028] According to the first aspect, or any one of the implementations of the first aspect, each power supply branch further includes a fourth electric core, wherein the positive electrode of the fourth electric core is connected to the negative electrode of the third electric core, and the positive electrode of the fourth electric core is configured to input a fourth battery voltage.

[0029] The power supply circuit further includes:

[0030] a fourth voltage converter, an input end of the fourth voltage converter is connected with the positive pole of the fourth battery cell, an output end of the fourth voltage converter is connected with the fourth load, the fourth voltage converter is configured to convert the fourth battery voltage into a fourth use voltage and output the fourth use voltage to the fourth load,

[0031] wherein a sixth absolute difference between the fourth battery voltage and the fourth use voltage is less than a seventh absolute difference between the first battery voltage and the fourth battery voltage.

[0032] In this way, when the electronic device includes the fourth voltage converter, the fourth voltage converter is connected with the positive pole of the fourth battery cell, thereby further reducing the voltage difference between the input end and the output end of the fourth voltage converter, improving the working efficiency of the fourth voltage converter, and further improving the battery endurance of the electronic device.

[0033] Exemplarily, the electronic device can be a performance book, and the performance book meets the performance requirement by adopting a power supply scheme of "4 strings and 1 parallel".

[0034] Exemplarily, taking the electronic device shown in FIG. 7 as an example, the fourth battery cell can be the fourth battery cell P4, the fourth battery voltage Vout4 can be in a range of 3-4.5 V, and the fourth voltage converter can include the second BUCK 122 and the third BUCK 123.

[0035] According to the first aspect, or any one of the implementation manners of the first aspect, the second voltage converter includes a first step-down converter, the second use voltage is less than a minimum voltage value of the second battery voltage and greater than or equal to a minimum voltage value of the third battery voltage; the third voltage converter includes a second step-down converter, the third use voltage is less than the minimum voltage value of the third battery voltage and greater than or equal to the minimum voltage value of the fourth battery voltage; and the fourth voltage converter includes a third step-down converter, the fourth use voltage is less than the minimum voltage value of the fourth battery voltage.

[0036] Exemplarily, taking the electronic device shown in FIG. 7 as an example, the value range of the second use voltage can be [6V, 9V), the value range of the third use voltage can be [3V, 6V), and the value range of the fourth use voltage can be (0, 3V).

[0037] According to the first aspect, or any one of the implementation manners of the first aspect, the first load includes a first sub-load, the second load includes a second sub-load, the use voltage of the first sub-load and the use voltage of the second sub-load are both less than the second battery voltage, the load current of the first sub-load is greater than the load current of the second sub-load, and / or the dynamic response rate of the first sub-load is greater than the dynamic response rate of the second sub-load.

[0038] In this way, the load with high dynamic response requirement and large load current can be connected to the positive electrode of the first battery cell through the first voltage converter, and since the voltage of the first battery cell is high, the impedance heat loss of the input path of the first voltage converter and voltage drop caused by the path impedance can be reduced, the battery endurance is improved, and the design difficulty of the power supply design scheme is reduced.

[0039] For example, the first sub-load can be a load with high peak current and high dynamic response, such as a CPU core, a GPU core, and an NPU core.

[0040] According to the first aspect or any one of the implementations of the first aspect, the first load includes a first sub-load, the first voltage converter includes a first voltage conversion element connected to the first sub-load, and the power supply circuit further includes: a first switch, a first connection end of the first switch being connected to the positive electrode of the first battery cell, and a second connection end of the first switch being connected to an input end of the first voltage conversion element; a second switch, a first connection end of the second switch being connected to the positive electrode of the second battery cell, and a second connection end of the second switch being connected to the input end of the first voltage conversion element; in a case where the first sub-load is in a first state, the first switch is turned on, and the second switch is turned off; and in a case where the first sub-load is in a second state, the first switch is turned off, and the second switch is turned on.

[0041] In this way, when the first sub-load is in the first state, i.e., when the performance requirement is high, the performance requirement of the first sub-load can be met by being connected to the positive electrode of the first battery cell; and when the first sub-load is in the second state, i.e., when the performance requirement is low, the voltage difference of the first voltage conversion element can be reduced by being connected to the positive electrode of the second battery cell, and the working efficiency of the first voltage conversion element can be improved, so that the battery endurance can be further improved while the performance requirement of the first sub-load is met.

[0042] For example, the first sub-load can be the first sub-load 1301, and the first voltage conversion element can be the first BUCK 121.

[0043] For example, in a case where the battery module further includes a third battery cell, the first connection end of the second switch is connected to the positive electrode of the third battery cell. For example, in the electronic device shown in FIG. 10, the input end of the first BUCK 121 is connected to the positive electrode of the third battery cell P3.

[0044] For example, in a case where the power supply circuit further includes a fourth battery cell, the first connection end of the second switch is connected to the positive electrode of the fourth battery cell. For example, in the electronic device shown in FIG. 11, the first connection end of the second switch S2 is connected to the positive electrode of the fourth battery cell P4.

[0045] Exemplarily, the first state can be a state with high load, such as running a large task, or running multiple tasks simultaneously. The second state can be a state with light load, such as running a small number of tasks, or not running a task.

[0046] According to the first aspect, or any one of the implementations of the first aspect, the power supply circuit further includes a balancing circuit connected with the first battery cell and the second battery cell respectively, configured to balance the electric quantity of the first battery cell and the second battery cell.

[0047] In this way, through the balancing circuit, the difference in electric quantity between the battery cells caused by different connected loads can be reduced, and the safety of the battery use is improved.

[0048] Exemplarily, the balancing circuit can be an active balancing circuit. Compared with a passive balancing circuit, the active balancing circuit has low electric energy loss and low heat loss of the battery cell, and has large balancing current, high balancing speed, high balancing quality, and low electric quantity loss.

[0049] According to the first aspect, or any one of the implementations of the first aspect, the balancing circuit comprises: a first control switch, a first connection end of the first control switch is connected with a positive electrode of the first battery cell, and a second connection end of the first control switch is connected with a first connection end of a third control switch; a second control switch, a first connection end of the second control switch is connected with a negative electrode of the first battery cell, and a second connection end of the second control switch is connected with a first connection end of a fourth control switch; the third control switch, a second connection end of the third control switch is connected with a second connection end of a seventh control switch; the fourth control switch, a second connection end of the fourth control switch is grounded; a fifth control switch, a first connection end of the fifth control switch is connected with a positive electrode of the second battery cell, and a second connection end of the fifth control switch is connected with a first connection end of the seventh control switch; a sixth control switch, a first connection end of the sixth control switch is connected with a negative electrode of the second battery cell, and a second connection end of the sixth control switch is connected with a first connection end of an eighth control switch; the seventh control switch; the eighth control switch, a second connection end of the eighth control switch is grounded; a first balancing capacitor, a first end of the first balancing capacitor is connected with the second connection end of the first control switch and the first connection end of the third control switch respectively, and a second end of the first balancing capacitor is connected with the second connection end of the second control switch and the first connection end of the fourth control switch respectively; a second balancing capacitor, a first end of the second balancing capacitor is connected with the second connection end of the fifth control switch and the first connection end of the seventh control switch respectively, and a second end of the second balancing capacitor is connected with the second connection end of the sixth control switch and the first connection end of the eighth control switch respectively; wherein, the balancing circuit alternately enters a first balancing stage and a second balancing stage in a balancing process, in the first balancing stage, the first control switch, the second control switch, the fifth control switch and the sixth control switch are turned on, and the third control switch, the fourth control switch, the seventh control switch and the eighth control switch are turned off; in the second balancing stage, the first control switch, the second control switch, the fifth control switch and the sixth control switch are turned off, and the third control switch, the fourth control switch, the seventh control switch and the eighth control switch are turned on.

[0050] In this way, since the balancing capacitor performs balancing through the mode of power storage and power transfer, the power loss of the balancing circuit is reduced, and the balancing rate is improved.

[0051] Exemplarily, control ends of the first control switch, the second control switch, the fifth control switch and the sixth control switch are used to receive a first driving signal HO. Control ends of the third control switch, the fourth control switch, the seventh control switch and the eighth control switch are used to receive a second driving signal LO. Wherein, the first driving signal HO and the second driving signal LO are reverse signals.

[0052] In the case that each control switch is an NMOS, in the first equalization stage, the first driving signal HO is high, and the second driving signal is low, so as to connect each battery cell in parallel with the equalization capacitor corresponding to the battery cell; in the second equalization stage, the first driving signal HO is low, and the second driving signal is high, so as to connect the plurality of equalization capacitors in parallel. Alternatively, each control switch can also be a PMOS, and correspondingly, in the first equalization stage, the first driving signal HO is low, and the second driving signal LO is high, and in the second equalization stage, the first driving signal HO is high, and the second driving signal LO is low.

[0053] Exemplarily, in the case that the power supply circuit further includes a third battery cell, the equalization circuit further includes a ninth control switch to a twelfth control switch, and a third equalization capacitor.

[0054] Exemplarily, in the case that the power supply circuit further includes a fourth battery cell, the equalization circuit further includes a thirteenth control switch to a sixteenth control switch, and a fourth equalization capacitor.

[0055] According to the first aspect, or any one of the implementation forms of the first aspect, the switching frequency of the first control switch to the eighth control switch is positively correlated with the pressure difference between the first battery cell and the second battery cell.

[0056] In this way, when the pressure difference between the battery cells is low, the equalization is performed at a low switching frequency, so as to reduce the equalization loss. When the pressure difference between the battery cells is high, the equalization is performed at a high switching frequency, so as to improve the equalization effect.

[0057] According to a second aspect, an embodiment of the present application provides an electronic device, which includes the power supply circuit, the first load and the second load in the first aspect or any possible implementation form of the first aspect.

[0058] According to the second aspect, the electronic device can be a notebook computer.

[0059] The second aspect and any one of the implementation forms of the second aspect correspond to the first aspect and any one of the implementation forms of the first aspect respectively. The technical effects of the second aspect and any one of the implementation forms of the second aspect can be referred to the technical effects of the first aspect and any one of the implementation forms of the first aspect, which will not be described herein again. BRIEF DESCRIPTION OF DRAWINGS

[0060] FIG. 1 shows a structural schematic diagram of an electronic device according to an embodiment of the present application;

[0061] FIG. 2 shows a structural schematic diagram of a battery power supply circuit in a related technical solution according to an embodiment of the present application;

[0062] FIG. 3 shows a structural schematic diagram of a battery module according to an embodiment of the present application;

[0063] FIG. 4 shows a schematic diagram of an exemplary efficiency versus load current variation according to an embodiment of the present application;

[0064] FIG. 5 shows a schematic diagram of an electronic device according to an embodiment of the present application;

[0065] FIG. 6 shows a schematic diagram of an electronic device according to an embodiment of the present application;

[0066] FIG. 7 shows a schematic diagram of an electronic device according to an embodiment of the present application;

[0067] FIG. 8 shows a schematic diagram of an electronic device according to an embodiment of the present application;

[0068] FIG. 9 shows a schematic diagram of an electronic device according to an embodiment of the present application;

[0069] FIG. 10 shows a schematic diagram of an electronic device according to an embodiment of the present application;

[0070] FIG. 11 shows a schematic diagram of an electronic device according to an embodiment of the present application;

[0071] FIG. 12 shows a schematic diagram of an electronic device according to an embodiment of the present application;

[0072] FIG. 13 shows a schematic diagram of an active equalization process according to an embodiment of the present application;

[0073] FIG. 14 shows a schematic diagram of an exemplary equalization circuit according to an embodiment of the present application;

[0074] FIG. 15 shows a schematic diagram of an exemplary drive signal according to an embodiment of the present application;

[0075] FIG. 16 shows an equivalent circuit diagram of an exemplary equalization circuit according to an embodiment of the present application;

[0076] FIG. 17 shows an equivalent circuit diagram of another exemplary equalization circuit according to an embodiment of the present application;

[0077] FIG. 18 shows a schematic diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0078] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0079] The term "and / or", merely describes an associated relationship, which means that there can be three relationships, for example, A and / or B, which can represent three cases: A exists alone, A and B exist together, and B exists alone.

[0080] The terms "first" and "second" and the like in the description and claims of the present application are used to distinguish different objects, and are not used to describe a specific order of the objects. For example, the first target object and the second target object are used to distinguish different target objects, and are not used to describe a specific order of the target objects.

[0081] In the embodiments of the present application, the words such as "exemplary" or "for example" are used to mean an example, illustration, or description. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the words such as "exemplary" or "for example" are intended to present the relevant concept in a specific manner.

[0082] In the description of the embodiments of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. For example, a plurality of processing units means two or more processing units; a plurality of systems means two or more systems.

[0083] In the process of continuous development, electronic devices such as mobile phones and tablet computers have become indispensable in people's daily life. Among them, as the power source of various components of electronic devices, batteries have become an important component of electronic devices.

[0084] FIG. 1 shows a structural schematic diagram of an electronic device provided by an embodiment of the present application. As shown in FIG. 1, the electronic device 100 can be implemented as a personal computer (PC), and the PC can be provided with a battery module 110.

[0085] With the development of electronic devices such as personal computers (PCs), the power consumption of electronic devices such as PCs is often as high as tens to hundreds of watts. For example, the power consumption of a thin and light notebook computer can be tens of watts, and the power consumption of a game notebook computer can reach hundreds of watts. Even after the performance of a graphics processing unit (GPU) is further improved, the power consumption of the device can further increase, such as to several hundred watts. If a single cell is used for power supply, the high battery current can result in a large design difficulty of the entire power supply system.

[0086] Therefore, in a related technology, a battery design scheme of multiple battery cells in series is often adopted to supply power for electronic devices. For example, "2 in series and 2 in parallel", "3 in series and 1 in parallel", or "4 in series and 1 in parallel", etc. FIG. 2 shows a structural schematic diagram of a battery power supply circuit in a related technical scheme provided by an embodiment of the present application. As shown in FIG. 2, the electronic device can include a battery module 110, a voltage conversion module 120, a power consumption load 130, and a battery protection MOS 140. Among them, the positive electrode A1 of the battery module 110 is connected with the input end of the voltage conversion module 120, and the negative electrode A2 of the battery module 110 is grounded GND through the battery protection MOS 140. And the output end of the voltage conversion module 120 is connected with the power consumption load 130.

[0087] For the battery module 110, it can include at least one parallel branch, and two or more single battery cells are connected in series on each branch. For example, FIG. 3 shows a structural schematic diagram of a battery module provided by an embodiment of the present application. In an embodiment, as shown in (1) of FIG. 3, in a "4 in series and 1 in parallel" battery design scheme, the battery module 110 can include four first to fourth battery cells P1 to P4 connected in series. Specifically, the positive electrode of the first battery cell P1 is the positive electrode A1 of the battery module 110, the negative electrode of the first battery cell P1 is connected with the positive electrode of the second battery cell P2, the negative electrode of the second battery cell P2 is connected with the positive electrode of the third battery cell P3, the negative electrode of the third battery cell P3 is connected with the positive electrode of the fourth battery cell P4, and the negative electrode of the fourth battery cell P4 is the negative electrode A2 of the battery module 110.

[0088] In another embodiment, as shown in (2) of FIG. 3, in a "3 in series and 1 in parallel" battery design scheme, the battery module 110 can include three first to third battery cells P1 to P3 connected in series.

[0089] In yet another embodiment, as shown in (3) of FIG. 3, in a "2 in series and 1 in parallel" battery design scheme, the battery module 110 can include two first and second battery cells P1 and P2 connected in series.

[0090] In still another embodiment, as shown in (4) of FIG. 3, in a "2 in series and 2 in parallel" battery design scheme, the battery module 110 can include two parallel branches, and each parallel branch can include two battery cells connected in series. For example, the branch 1 can include the first and second battery cells P1 and P2 connected in series, and the branch 2 can include the third and fourth battery cells P3 and P4 connected in series.

[0091] For the above battery module 110, its output voltage can be raised to multiple times of the output voltage of a single cell. For example, the "2 in series 1 in parallel" and "2 in series 2 in parallel" schemes can raise the output voltage of a single cell to twice, the "3 in series 1 in parallel" scheme can raise the output voltage of a single cell to three times, and the "4 in series 1 in parallel" scheme can raise the output voltage of a single cell to four times. For example, taking the output voltage of a single cell as 3-4.5 volts (V) as an example, the output voltage (hereinafter referred to as battery voltage) of the battery module 110 in the "4 in series 1 in parallel" scheme can reach 12-18V. It should be noted that the output voltage of the battery module 110 in the embodiments of the present application is variable. For example, when the battery module 110 shown in (1) of FIG. 3 is depleted, its output voltage can be 12V, and when each cell is in a full charge state, its output voltage can be 18V.

[0092] After introducing the above battery module 110, the power consuming load 130 and the voltage conversion module 120 are described.

[0093] Because different loads in an electronic device require different power consumption voltages, accordingly, the power consuming load 130 can be divided into a first sub-load, a second sub-load, and so on according to different power consumption voltages. For example, as shown in FIG. 2, the power consuming load 130 can include a first sub-load 1301, a second sub-load 1302, a third sub-load 1303, a fourth sub-load 1304, a fifth sub-load 1305, a sixth sub-load 1306, and a seventh sub-load 1307. In the embodiments of the present application, part of the power consuming load 130 can be located on the circuit board of the electronic device, such as the CPU and other loads, which can be soldered on the circuit board. Another part of the power consuming load 130 can be located outside the circuit board of the electronic device, such as a fan, which can be connected to the circuit board of the electronic device through a line.

[0094] Further, the electronic device also needs to convert the battery voltage into different power supply voltages through various voltage conversion modules 120. In the embodiments of the present application, the voltage conversion module 120 can be implemented as a direct current-direct current (DC-DC) converter, i.e. a voltage converter with an inductor as an energy storage element, such as a buck converter (BUCK), a boost converter (BOOST), or a buck-boost converter (BUCK-BOOST). For example, as shown in FIG. 2, the voltage conversion module 120 can include a first BUCK 121, a second BUCK 122, a third BUCK 123, a fourth BUCK 124, a fifth BUCK 125, a sixth BUCK 126, and a first buck-boost converter 127. In the embodiments of the present application, each converter (such as a BUCK or a BOOST) can be implemented as a single chip, or multiple converters can be integrated into a power management unit (PMU). It should be noted that in the embodiments of the present application, the voltage conversion module 120 can also be implemented as other converters, such as a switch capacitor (SC) circuit, etc., without specific limitation.

[0095] With continued reference to FIG. 2, after the battery module 110 outputs the output voltage Vout1, the first BUCK 121 can step down the output voltage Vout1 to a power supply voltage of 0.6V and output the power supply voltage of 0.6V to the first sub-load 1301 to meet the power supply requirement of the first sub-load 1301; the second BUCK 122 can step down the output voltage Vout1 to a power supply voltage of 1.2V to provide the power supply voltage of 1.2V to the second sub-load 1302; …; the sixth BUCK 126 can step down the output voltage Vout1 to a power supply voltage of 7.3V to provide the power supply voltage of 7.3V to the sixth sub-load 1306; and the first buck-boost converter 127 can adjust the output voltage Vout1 to a power supply voltage of 12V to provide the power supply voltage of 12V to the seventh sub-load 1307.

[0096] The inventors have found that the working efficiency of a DC voltage converter, such as a buck converter, is inversely proportional to the voltage difference between the two ends (the voltage difference between the input end and the output end). That is, the greater the voltage difference between the two ends of the DC voltage converter, the lower the working efficiency (power conversion efficiency), and the smaller the voltage difference between the two ends, the higher the working efficiency. For example, FIG. 4 shows an exemplary efficiency-load current variation diagram provided by an embodiment of the present application. As shown in FIG. 4, in the case where the output voltage Vout is 1.2V, curve 1-4 shows the working efficiency of the buck converter with respect to the load current when the input voltage Vin is 5V, 12V, 19V, and 23V, respectively.

[0097] As can be seen from the comparison between curves 1-4, when the input voltage Vin is 5V, the working efficiency of the buck converter is higher than that of other input voltages. For example, when the load current is 1A, if the input voltage Vin is 19V, the working efficiency of the buck converter is about 85%; and when the input voltage Vin is 5V, the working efficiency of the buck converter is about 92%, with a difference of 7% between the two efficiencies. Therefore, the greater the voltage difference between the two ends of the buck converter, the greater the heat loss of the buck converter, and the lower the working efficiency (power conversion efficiency),

[0098] In addition, the inventors have also found that in the battery design scheme shown in FIG. 2, the output voltage Vout1 of the battery module is relatively high, and the voltage difference between the two ends of some DC voltage converters is relatively large. For example, the input voltage of the first BUCK121 can be as high as 18V, and the output voltage can be as low as 0.6V. Accordingly, the working efficiency of some DC voltage converters is relatively low due to the relatively large voltage difference between the two ends. The relatively large voltage difference will cause more heat loss in the voltage conversion process, affect the working efficiency of the buck converter, and further affect the waste of battery power and the battery endurance of the electronic device.

[0099] Based on this, the present application provides a power supply circuit and an electronic device. In the case where the battery module of the electronic device includes a plurality of series-connected battery cells, by connecting the voltage converter to the positive electrode of different battery cells, the voltage difference between the two ends of some voltage converters can be reduced, the working efficiency of the voltage converter can be improved, the power utilization rate of the battery module can be improved, and the battery endurance of the electronic device can be improved.

[0100] Before starting to introduce the technical solutions of the embodiments of the present application, the technical terms of the embodiments of the present application are first described.

[0101] (1) Direct Current-Direct Current (DC-DC), which is a device for converting input voltage to output voltage. Exemplarily, the DC-DC converter can be a converter with an inductor as an energy storage element, for example, the DC-DC converter can include a BUCK converter, a BOOST converter, a BUCK-BOOST converter, etc. It should be noted that it can also include a Switch Capacitor Converter (SC) circuit, etc., which is not specifically limited.

[0102] (2) Buck converter, which is a device for reducing input voltage to a fixed voltage value of output voltage. Exemplarily, the buck converter can be a BUCK converter. In one example, one or more BUCK converters can be integrated into a power supply chip, which is not limited in specific form.

[0103] (3) Boost converter, which is a device capable of increasing input voltage to a fixed voltage value of output voltage. Exemplarily, the boost converter can be a BOOST converter. In one example, one or more BOOST converters can also be integrated into a power supply chip, which is not limited in specific form.

[0104] (4) Buck-boost converter, which is a converter with both boost and buck functions. Exemplarily, the buck-boost converter can be a BOOST-BUCK converter.

[0105] After introducing the above terms, the electronic device related to the embodiments of the present application will be described next. It should be noted that the electronic device provided by the embodiments of the present application includes but is not limited to mobile phones, tablet computers, notebook computers, Ultra-Mobile Personal Computer (UMPC), Personal Digital Assistant (PDA), Point Of Sales (POS) machines, intercoms, vehicle-mounted computers, televisions, smart wearable devices (such as smart watches or smart bracelets, etc.), smart home devices (such as Bluetooth speakers, etc.), vehicle recorders, security devices, etc. The electronic device provided by the embodiments of the present application is not specifically limited in type. For the convenience of description, the embodiments of the present application take the PC as an example for description.

[0106] FIG. 5 shows a structural schematic diagram of the electronic device 200. It should be understood that the electronic device 200 shown in FIG. 5 is only one example of the electronic device, and the electronic device 200 can have more or fewer components than those shown in the figure, can combine two or more components, or can have a different configuration of components. The various components shown in FIG. 5 can be implemented in hardware, software, or a combination of hardware and software including one or more signal processing and / or application-specific integrated circuits.

[0107] The electronic device 200 can include a processor 210, an external memory interface 220, an internal memory 221, a universal serial bus (USB) interface 230, a charging management module 240, a power management module 241, a battery 242, an antenna 1, an antenna 2, a mobile communication module 250, a wireless communication module 260, an audio module 270, a speaker 270A, a receiver 270B, a microphone 270C, a headset interface 270D, a sensor module 280, a key 290, a motor 291, an indicator 292, a camera 293, a display screen 294, and a subscriber identification module (SIM) card interface 295, etc. The sensor module 280 can include a pressure sensor 280A, a gyroscope sensor 280B, a barometric pressure sensor 280C, a magnetic sensor 280D, an acceleration sensor 280E, a distance sensor 280F, a proximity light sensor 280G, a fingerprint sensor 280H, a temperature sensor 280J, a touch sensor 280K, an ambient light sensor 280L, a bone conduction sensor 280M, etc.

[0108] The processor 210 can include one or more processing units, for example: the processor 210 can include an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a memory, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU), etc. Different processing units can be independent devices or integrated in one or more processors.

[0109] The controller can be the nerve center and command center of the electronic device 200. The controller can generate operation control signals according to instruction operation codes and timing signals to complete the control of fetching and executing instructions.

[0110] The processor 210 can also be provided with a memory for storing instructions and data. In some embodiments, the memory in the processor 210 is a cache memory. The USB interface 230 is an interface conforming to the USB standard specification, and can be a Mini USB interface, a Micro USB interface, a USB Type C interface, etc. The USB interface 230 can be used to connect a charger to charge the electronic device 200, and can also be used to transmit data between the electronic device 200 and a peripheral device. It can also be used to connect a headset to play audio through the headset. The interface can also be used to connect to other electronic devices, such as AR devices, etc.

[0111] The charging management module 240 is used to receive charging input from a charger. The charger can be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module 240 can receive charging input from a wired charger through the USB interface 230. In some wireless charging embodiments, the charging management module 240 can receive wireless charging input through a wireless charging coil of the electronic device 200. The charging management module 240 can charge the battery 242 while also providing power to the electronic device through the power management module 241.

[0112] The power management module 241 is used to connect the battery 242, the charging management module 240, and the processor 210. The power management module 241 receives input from the battery 242 and / or the charging management module 240 to provide power to the processor 210, the internal memory 221, the external memory, the display 294, the camera 293, and the wireless communication module 260, etc. In embodiments of the present application, the power management module 241 can be implemented as a voltage conversion module 120. In embodiments of the present application, the battery 242 can be implemented as a battery module 110. For example, referring to FIG. 3, the battery module can include at least one power supply branch, and each power supply branch can include a plurality of series-connected battery cells.

[0113] The wireless communication function of the electronic device 200 can be implemented through the antenna 1, the antenna 2, the mobile communication module 250, the wireless communication module 260, the modem processor, and the baseband processor, etc.

[0114] The antenna 1 and the antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in the electronic device 200 can be used to cover a single or multiple communication frequency bands. Different antennas can also be multiplexed to improve the utilization rate of the antennas. For example, the antenna 1 can be multiplexed as a diversity antenna for a wireless local area network. In some other embodiments, the antennas can be used in combination with a tuning switch.

[0115] The mobile communication module 250 can provide a solution for wireless communication including 2G / 3G / 4G / 5G, etc. applied to the electronic device 200. The mobile communication module 250 can include at least one filter, a switch, a power amplifier, a low noise amplifier (LNA), etc. The wireless communication module 260 can provide a solution for wireless communication including wireless local area networks (WLAN) (e.g., wireless fidelity (Wi-Fi) network), bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared (IR) technology, etc. applied to the electronic device 200.

[0116] In some embodiments, the antenna 1 and the mobile communication module 250 of the electronic device 200 are coupled, and the antenna 2 and the wireless communication module 260 are coupled, so that the electronic device 200 can communicate with a network and other devices through wireless communication technology.

[0117] The electronic device 200 implements a display function through a GPU, a display screen 294, and an application processor, etc. The GPU is a microprocessor for image processing, connected to the display screen 294 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 210 can include one or more GPUs that execute program instructions to generate or change display information.

[0118] The display screen 294 is used to display images, videos, etc. The display screen 294 includes a display panel. The display panel can adopt a liquid crystal display (LCD), an organic light-emitting diode (OLED), etc. In some embodiments, the electronic device 200 can include 1 or M display screens 294, M being a positive integer greater than 1.

[0119] The electronic device 200 can implement a photographing function through an ISP, a camera 293, a video codec, a GPU, a display screen 294, and an application processor, etc.

[0120] The camera 293 is configured to capture still images or videos. An object projects an optical image through a lens to a photosensitive element. The photosensitive element can be a charge coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor. The photosensitive element converts the optical signal into an electrical signal, which is then transmitted to an ISP for conversion into a digital image signal. The ISP outputs the digital image signal to a DSP for processing. The DSP converts the digital image signal into a standard image signal in a format such as RGB, YUV, or the like. In some embodiments, the electronic device 200 can include one or N cameras 293, where N is a positive integer greater than one.

[0121] The external memory interface 220 can be configured to connect an external memory card, such as a Micro SD card, to extend the storage capacity of the electronic device 200. The external memory card communicates with the processor 210 via the external memory interface 220 to store data. For example, music, video, and the like can be stored in the external memory card.

[0122] The internal memory 221 can be configured to store computer-executable program code including instructions. The processor 210 executes various functions of the electronic device 200 and processes data by running the instructions stored in the internal memory 221. The internal memory 221 can include a program storage area and a data storage area. The program storage area can store an operating system, at least one application program (such as a sound play function, an image play function, and the like) required by a function, and the like. The data storage area can store data (such as audio data, a phonebook, and the like) created during use of the electronic device 200, and the like. In addition, the internal memory 221 can include a high-speed random access memory, and can further include a non-volatile memory such as at least one of a magnetic disk storage device, a flash memory device, a universal flash storage (UFS), and the like.

[0123] The electronic device 200 can implement an audio function through an audio module 270, a speaker 270A, a receiver 270B, a microphone 270C, an earphone interface 270D, an application processor, and the like. For example, music play, voice recording, and the like can be implemented.

[0124] The audio module 270 is configured to convert digital audio information into an analog audio signal and output the same, and to convert an analog audio input into a digital audio signal. The audio module 270 can further be configured to encode and decode an audio signal. In some embodiments, the audio module 270 can be disposed in the processor 210, or some of the functional modules of the audio module 270 can be disposed in the processor 210.

[0125] The keys 290 include a power key, a volume key, and the like. The keys 290 can be mechanical keys. The keys 290 can also be touch keys. The electronic device 200 can receive a key input, and generate a key signal input related to user settings and function control of the electronic device 200.

[0126] The motor 291 can generate a vibration prompt. The motor 291 can be used for incoming call vibration prompts, and can also be used for touch vibration feedback. For example, touch operations for different applications (e.g., taking pictures, playing audio, and the like) can correspond to different vibration feedback effects. The indicator 292 can be an indicator light, and can be used to indicate a charging state, a power change, and can also be used to indicate a message, a missed call, a notification, and the like.

[0127] FIG. 6 shows a structural schematic diagram of an exemplary electronic device according to an embodiment of the present application. As shown in FIG. 6, the electronic device 100 can include a battery module 110, a voltage conversion module 120, a CPU core 130a, a GPU core 130b, a system input / output (IO) module 130c, an embedded controller (EC) module 130d, a cooling fan 130e, a camera module 130f, a loudspeaker power amplifier circuit 130g, a USB OTG (USB On-The-Go) module 130h, and a screen module 130i.

[0128] In the embodiment of the present application, the voltage conversion module 120 can provide a dynamic power supply voltage to the CPU core 130a, and the voltage range of the dynamic power supply voltage can be 0.6V-1.55V. Exemplarily, the electronic device 100 can provide a power supply voltage of 0.6V to the CPU core 130a by the voltage conversion module 120 in the case of executing a large task or the like under light load, and provide a power supply voltage of 1.55V to the CPU core 130a by the voltage conversion module 120 under high load, so as to improve the performance of the electronic device while saving the power consumption of the electronic device.

[0129] And, the voltage conversion module 120 can provide a dynamic power supply voltage to the GPU kernel 130b, the voltage range of which can be 0.3V-1.3V. The voltage conversion module 120 can also provide a voltage of 1.8V to the system IO module 130c to make the system IO module 130c generate a logic level. The voltage conversion module 120 can also provide a power supply voltage of 3.3V to the EC module 130d. The voltage conversion module 120 can also provide a power supply voltage of 12V to the cooling fan 130e. The voltage conversion module 120 can also provide power supply voltages of 1.2V, 1.8V, 2.8V, and 3.3V to the camera module 130f. The voltage conversion module 120 can also provide power supply voltages of 12V and 1.2V to the loudspeaker power amplifier circuit 130g. The voltage conversion module 120 can also provide a power supply voltage of 5V to the USB OTG module 130h. The voltage conversion module 120 can also provide a power supply voltage of 7.3V to the screen module 130i.

[0130] And, for the above-mentioned power-consuming devices, such as CPU kernel, etc., which can be provided on the circuit board of the electronic device 100. Such as cooling fan, etc., which can be provided separately from the circuit board, and the setting position thereof is not specifically limited. It should be noted that the other contents of the battery module 110 and the voltage conversion module 120 can refer to the related description in the above-mentioned part of the present application, and will not be repeated here.

[0131] After introducing the above-mentioned hardware structure, the specific scheme of the embodiment of the present application will be described next.

[0132] FIG. 7 shows a structural schematic diagram of an electronic device provided by an embodiment of the present application. As shown in FIG. 7, the electronic device can include a battery module 110, a voltage conversion module 120, a power-consuming load 130, and a battery protection MOS 140. It should be noted that in the field of notebook computers, such as performance notebooks, etc., which have the characteristics of strong performance and large power, etc., and often need to have a larger power supply voltage, therefore, such as performance notebooks, etc. can adopt the power supply design scheme of “4 strings in parallel” shown in FIG. 7 as its power supply circuit.

[0133] Different from the electronic device shown in FIG. 2, in the electronic device shown in FIG. 7, the positive electrode of the first battery cell P1 outputs a first battery voltage Vout1, the positive electrode of the second battery cell P2 outputs a second battery voltage Vout2, the positive electrode of the third battery cell P3 outputs a third battery voltage Vout3, and the positive electrode of the fourth battery cell P4 outputs a fourth battery voltage Vout4. In one example, if the battery cell voltage VBAT ranges from 3V to 4.5V, the first battery voltage Vout1 is equal to 4 times the battery cell voltage VBAT, i.e., the first battery voltage Vout1 ranges from 12V to 18V; the second battery voltage Vout2 is equal to 3 times the battery cell voltage VBAT, i.e., the second battery voltage Vout2 ranges from 9V to 13.5V; the third battery voltage Vout3 is equal to 2 times the battery cell voltage VBAT, i.e., the third battery voltage Vout3 ranges from 6V to 9V; and the fourth battery voltage Vout4 is equal to the battery cell voltage VBAT, i.e., the fourth battery voltage Vout4 ranges from 3V to 4.5V.

[0134] In some embodiments, the first battery cell P1 to the fourth battery cell P4 can adopt the same battery cell, such as battery cells with the same specifications. In another embodiment, since the power consumption of each battery cell is different, in order to ensure the safety of the battery, the battery capacity of the first battery cell P1 to the fourth battery cell P4 can be different, such as since the power consumption of the first battery cell P1 to the fourth battery cell P4 increases in turn, the battery capacity of the first battery cell P1 to the fourth battery cell P4 can increase in turn. Exemplarily, for any one of the second battery cell P2 to the fourth battery cell P4, it can include a plurality of single battery cells in parallel to increase the battery capacity of the battery cell. Alternatively, the battery capacity of the battery cell can be increased by selecting a battery cell with large capacity, which is not specifically limited.

[0135] For the voltage conversion module 120, it can include multiple voltage converters, and the output voltage of each voltage converter is different. In the embodiment of the present application, the voltage converters can be implemented as BUCK, BOOST or BUCK-BOOST. For example, the voltage converters can include first to sixth BUCKs 121-126, and further include a first BUCK-BOOST 127. In one example, in order to reduce the power supply cost, each voltage converter is preferably a BUCK. Accordingly, the output voltage of each voltage converter should be less than the minimum battery value of the connected battery cell. For example, the output voltage of the BUCK connected to the second battery cell P2 should be less than 9V. In addition, when the BUCK cannot work, a BOOST (in this case, the output voltage of each voltage converter should be greater than the maximum voltage value of the connected battery cell, for example, the output voltage of the BOOST connected to the second battery cell P2 should be greater than 13.5V) or a BUCK-BOOST (the output voltage of the BUCK-BOOST is less than or equal to the maximum voltage of the connected battery cell and greater than or equal to the minimum voltage of the connected battery cell) can be selected. For example, continuing to refer to FIG. 7, the power consumption voltage of the seventh sub-load 1307 is 12V, and in order to ensure that the voltage converter works normally, the first BUCK-BOOST 127 needs to be selected. It should be noted that in the embodiment of the present application, the BUCK or BUCK-BOOST can also be preferably selected according to other requirements, and no specific limitation is made herein.

[0136] In one embodiment, the fourth battery cell P4 can be connected to one or more BUCKs, and the output voltage of the BUCK connected to the fourth battery cell P4 is less than 3V. For example, continuing to refer to FIG. 7, the input end of the third BUCK 123 and the input end of the second BUCK 122 are both connected to the positive electrode of the fourth battery cell P4.

[0137] The third battery cell P3 can also be connected to one or more BUCKs, and the output voltage of the BUCK connected to the third battery cell P3 is greater than or equal to 3V and less than 6V. For example, continuing to refer to FIG. 7, the input end of the fifth BUCK 125 and the input end of the fourth BUCK 124 are both connected to the positive electrode of the third battery cell P3, for obtaining the third battery voltage Vout3.

[0138] The second battery cell P2 can also be connected to one or more BUCKs, and the output voltage of the BUCK connected to the second battery cell P2 is greater than or equal to 6V and less than 9V.

[0139] The first electric cell P1 can be connected to one or more BUCKs, and the output voltage of the BUCK connected to the first electric cell P1 is greater than or equal to 9V and less than 9V. Alternatively, when the output end of the BUCK connected to the first electric cell P1 needs to be connected to a load with a large current peak value and high dynamic response requirement, the output voltage of the BUCK is less than 12V. Illustratively, continuing to refer to FIG. 7, the input end of the first BUCK 121 is connected to the positive electrode of the first electric cell P1, for obtaining the first battery voltage Vout1. Alternatively, the first electric cell P1 can be connected to one or more BOOSTs, and the output voltage of the BOOST connected to the first electric cell P1 is greater than 18V. Alternatively, the first electric cell P1 can also be connected to one or more buck-boost converters, and the output voltage of the buck-boost converter can be any voltage value. In one embodiment, the output voltage of the buck-boost converter connected to the first electric cell P1 can be greater than or equal to 12V and less than or equal to 18V. Illustratively, continuing to refer to FIG. 7, the input end of the first buck-boost converter 127 is connected to the positive electrode of the first electric cell P1, for obtaining the first battery voltage Vout1.

[0140] Through the above embodiments, the second electric cell P2 to the fourth electric cell P4 are connected to BUCK devices, the first electric cell P1 is connected to a BUCK, a BOOST or a buck-boost converter, which can normally supply power to each load in the electronic device, improve the endurance of the battery module, and reduce the complexity and cost of the power supply circuit.

[0141] It should be noted that, according to actual scenarios and specific requirements, the fourth electric cell P4 can also be connected to a BOOST, and the output voltage of the BOOST connected to the fourth electric cell P4 should be greater than 4.5V. In one example, the output voltage of the BOOST connected to the fourth electric cell P4 is greater than 4.5V and less than 9V. Alternatively, the fourth electric cell P4 can also be connected to a buck-boost converter, and the output voltage of the buck-boost converter can be any voltage value. In one embodiment, the output voltage of the buck-boost converter connected to the fourth electric cell P4 can be greater than or equal to 3V and less than or equal to 4.5V.

[0142] In addition, it should be noted that, when the output end of the BUCK connected to the third electric cell P3 needs to be connected to a load with a large current peak value and high dynamic response requirement, the output voltage of the BUCK is less than 6V. Alternatively, the third electric cell P3 can also be connected to a BOOST, and the output voltage of the BOOST connected to the third electric cell P3 should be greater than 9V. In one example, the output voltage of the BOOST connected to the third electric cell P3 is greater than 9V and less than 13.5V. Alternatively, the third electric cell P3 can also be connected to a buck-boost converter, and the output voltage of the buck-boost converter can be any voltage value. In one embodiment, the output voltage of the buck-boost converter connected to the third electric cell P3 can be greater than or equal to 4.5V and less than or equal to 9V.

[0143] Also, it needs to be noted that when the output end of the BUCK connected to the second battery P2 needs to be connected to a load with high current peak value and high dynamic response requirement, the output voltage of the BUCK is less than 9V. Exemplarily, the input end of the sixth BUCK 126 is connected to the positive electrode of the second battery P2, for obtaining the second battery voltage Vout2. The second battery P2 can also be connected to a BOOST, and the output voltage of the BOOST connected to the second battery P2 should be greater than 13.5V. In an example, the output voltage of the BOOST connected to the second battery P2 is greater than 13.5V and less than 18V. Alternatively, the second battery P2 can also be connected to a buck-boost converter, and the output voltage of the buck-boost converter can be any voltage value. In an embodiment, the output voltage of the buck-boost converter connected to the second battery P2 can be greater than or equal to 9V and less than or equal to 13.5V.

[0144] It needs to be noted that when the electronic device further includes loads with other power supply voltages, for example, the electronic device further includes loads with power supply voltages of 4.8V and 3V, the electronic device further includes voltage converters for outputting 4.8V and 3V, and the number of voltage converters and the values of output voltages in the embodiments of the present application are not specifically limited.

[0145] After introducing the voltage conversion module 120, the power consumption load 130 will be described next.

[0146] Also, the power consumption load 130 can include a first load 131, a second load 132, a third load 133 and a fourth load 134, which will be described one by one next.

[0147] For the first load 131, the power supply voltage thereof is generated by using the first battery voltage Vout1. In the embodiments of the present application, the first load 131 can satisfy the following condition 1 or condition 2.

[0148] Condition 1: the load with large current peak value or high dynamic response requirement. Exemplarily, the first load can be one or more of a CPU core, a GPU core, and an NPU core. In one example, still referring to FIG. 7, the first sub-load 1301 can be a device with large current peak value and high dynamic response requirement, such as a CPU core. It should be noted that for a device with large current peak value and high dynamic response requirement, the current peak value can be as high as tens of amperes, such as a CPU core, which can have a current peak value of tens to hundreds of amperes, so that the instantaneous input power of the power supply chip (i.e., the voltage converter) is very high. If a lower battery voltage is used, such as directly using the fourth battery voltage Vout for power supply, the current extracted from the battery module is very large, at which time the layout design difficulty is increased due to the need to widen the wiring and the like to make the wiring path impedance very small. Therefore, in the embodiments of the present application, the first battery voltage Vout1 is used to power such loads. Since the first battery voltage Vout1 is high, the input current can be reduced, the design difficulty is reduced, and the power safety is improved. It should be noted that in the embodiments of the present application, the second battery voltage Vout2 or the third battery voltage Vout3 can also be used for power supply according to the size of the load peak current and the speed of the dynamic response, which is not specifically limited herein.

[0149] In addition, in the case where the first sub-load 1301 is one or more of a CPU core, a GPU core, and an NPU core, the output voltage of the first BUCK 121 can be dynamically changed according to the task amount of the above-mentioned core. For example, taking a CPU core as an example, if the task amount of the CPU core is light, the first BUCK 121 can output a voltage of 0.6V under the control of the controller such as a CPU; and when the task amount of the CPU core is heavy (such as processing large tasks or processing multiple tasks in parallel), the first BUCK 121 can output a voltage of 1.55V under the control of the controller such as a CPU, so as to meet the power demand of the load with large load power and high dynamic response requirement such as a CPU core, while saving power consumption.

[0150] It should be noted that for the load with large current peak value or high dynamic response requirement, it can also be connected to the positive electrode of the second electric core P2, the positive electrode of the third electric core P3, or the positive electrode of the fourth electric core P4 through the voltage converter according to the actual situation, such as estimating the instantaneous peak power of the above-mentioned load through a peak current estimation module, and then calculating the voltage value under one times the core voltage (VBAT) to four times the core voltage (4*VBAT). Then the current value determines the requirement of the wiring width. Then according to the PCB wiring condition and the cost requirement, a suitable wiring width and impedance control target are selected, so as to comprehensively determine which positive electrode of the above-mentioned load is connected to under the condition of meeting the wiring width requirement and the impedance requirement, which is not specifically limited herein.

[0151] Condition 2: the power consumption voltage of the first load 131 is in a first value range, and the specific content of the first value range can be referred to the related description in the foregoing part of the embodiments of the present application. For example, taking the BUCK connected to the first load 131 as an example, the power consumption voltage of the first load 131 can be less than 12V (the minimum voltage value of the first battery voltage Vout1), and at this time, the first value range is (0, 12V). For example, the power consumption voltage of the first load 131 is less than 12V and greater than or equal to 9V (the minimum voltage value of the second battery voltage Vout2), and at this time, the first value range is [9V, 12V). Taking the BOOST connected to the first load 131 as an example, the power consumption voltage of the first load 131 can be greater than 18V (the maximum voltage value of Vout1). Taking the boost-buck converter connected to the first cell P1 as an example, the power consumption voltage of the first load 131 can not be limited. Alternatively, the power consumption voltage of the first load 131 can be greater than or equal to 12V and less than or equal to 18V, and at this time, the first value range can be [9V, 18V]. In an example, continuing to refer to FIG. 7, the power consumption voltage of the seventh sub-load 1307 is 12V, wherein the seventh sub-load can be a cooling fan 130e.

[0152] For the second load 132, the power consumption voltage thereof can be generated by using the second battery voltage Vout2. In the embodiments of the present application, the second load 132 can satisfy the following condition 3.

[0153] Condition 3: the power consumption voltage of the second load 132 is in a second value range. In an embodiment, taking the BUCK connected to the second load 132 as an example, the second value range can be (0, 9V). In an embodiment, the second value range can be [6V, 9V). In an example, continuing to refer to FIG. 7, the second load 132 can include the sixth sub-load 1306 (the power consumption voltage is 7.3V), wherein the sixth sub-load 1306 can be the screen module 130i in FIG. 6.

[0154] It should be noted that when the voltage converter connected to the second load 132 is the BOOST converter or the boost-buck converter, the value range of the second load can also be other values, and the specific content can be referred to the related content of the output voltage of the voltage converter connected to the second cell P2 in the foregoing part of the embodiments of the present application, which will not be described herein.

[0155] For the third load 133, the power consumption voltage thereof can be generated by using the third battery voltage Vout3. In the embodiments of the present application, the third load 133 can satisfy the following condition 4.

[0156] Condition 4, the power consumption voltage of the third load 133 is in a third value range. In an embodiment, taking the BUCK converter connected with the third load 133 as an example, the third value range can be (0, 6V). In an embodiment, the third value range can be [3V, 6V). In an example, continuing to refer to FIG. 7, the third load 133 can include a fourth sub-load 1304 (with a power consumption voltage of 3.3V) and a fifth sub-load 1305 (with a power consumption voltage of 5V). Among them, the fourth sub-load 1304 can be the EC module 130d in FIG. 6. The fifth sub-load 1305 can be the USB OTG module 130h in FIG. 6.

[0157] It should be noted that when the voltage converter connected with the third load 133 is a BOOST converter or a buck-boost converter, the value range of the third load can also be other values, and the specific content can be referred to the related content of the output voltage of the voltage converter connected with the third battery P3 in the foregoing part of the embodiments of the present application. Details are not described herein.

[0158] For the fourth load 134, the power consumption voltage thereof can be generated by using the fourth battery voltage Vout4. In the embodiments of the present application, the fourth load 134 can satisfy the following condition 5.

[0159] Condition 4, the power consumption voltage of the fourth load 134 is in a fourth value range. In an embodiment, taking the BUCK converter connected with the fourth load 134 as an example, the fourth value range can be (0, 3V). In an example, continuing to refer to FIG. 7, the fourth load 134 can include a second sub-load 1302 (with a power consumption voltage of 1.2V) and a third sub-load 1303 (with a power consumption voltage of 1.8V). Among them, the second sub-load 1302 can be the camera module 130f and the loudspeaker power amplifier circuit 130g in FIG. 6. The third sub-load 1303 can be the system IO module 130c, the camera module 130f and the loudspeaker power amplifier circuit 130g in FIG. 6. It should be noted that if a load needs multiple power consumption voltages, such as the camera module 130f and the loudspeaker power amplifier circuit 130g, it can be considered as a third load and a fourth load, and so on.

[0160] It should be noted that when the voltage converter connected with the fourth load 134 is a BOOST converter or a buck-boost converter, the value range of the fourth load can also be other values, and the specific content can be referred to the related content of the output voltage of the voltage converter connected with the fourth battery P4 in the foregoing part of the embodiments of the present application. Details are not described herein.

[0161] In the specific power supply circuit process, for each power load, the voltage converter can be connected to the positive electrode of which battery cell according to the working efficiency of the voltage converter connected thereto, such as connecting each voltage converter according to the efficiency curve.

[0162] In a specific example, for the load with large current peak value or high dynamic response requirement, it can be connected to the positive electrode of the first battery cell P1 through the BUCK. For other power loads, if the power consumption voltage is in the value range of (0, 3V), it is the fourth load 134, and can be connected to the positive electrode of the fourth battery cell P4 through the BUCK device; if the power consumption voltage is in the value range of [3V, 6V), it is the third load 133, and can be connected to the positive electrode of the third battery cell P3 through the BUCK device; if the power consumption voltage is in the value range of [6V, 9V), it is the second load 132, and can be connected to the positive electrode of the second battery cell P2 through the BUCK device; if the power consumption voltage is in the value range of [9V, 12V), it is the first load 131, and can be connected to the positive electrode of the first battery cell P1 through the BUCK device; in the value range of [9V, 12V); if the power consumption voltage is in the value range of (18V, +∞), it is the first load 131, and can be connected to the positive electrode of the first battery cell P1 through the BOOST device; if the power consumption voltage is in the value range of [12V, 18V], it is the first load 131, and can be connected to the positive electrode of the first battery cell P1 through the buck-boost converter.

[0163] Through the example, the voltage difference between each voltage converter can be reduced as much as possible under the premise of generating the required voltage of each load, thereby improving the working efficiency of the voltage converter as much as possible, and further improving the endurance of the battery module.

[0164] FIG. 8 shows a structure schematic diagram of another electronic device provided by the embodiment of the present application, and FIG. 9 shows a structure schematic diagram of still another electronic device provided by the embodiment of the present application. It should be noted that in the field of notebook computers, such as light and thin notebooks, light and small notebooks, and notebooks with moderate or low performance requirements, the power supply design scheme of “2 serials and 1 parallel” shown in FIG. 8 or “2 serials and 2 parallel” shown in FIG. 9 can be used as the power supply circuit thereof.

[0165] Figure 8 differs from Figure 7 in that the battery module 110 includes 2 series-connected battery cells, i.e., the first battery cell P1 and the second battery cell P2 (i.e., a 2-in-series 1-in-parallel power supply design scheme). In addition, in the electronic device shown in Figure 8, the second load 132 includes a second sub-load 1302 and a third sub-load 1303. The second sub-load 1302 is connected to the positive electrode of the second battery cell P2 through the second BUCK 122, and the third sub-load 1303 is connected to the positive electrode of the second battery cell P2 through the third BUCK 123. It should be noted that the related content of the second load 132 in Figure 8 can be referred to the related description of the fourth load 134 in Figure 7 in the above embodiment, and will not be repeated here.

[0166] In addition, the first load 131 can include a load with a large current peak value or a high dynamic response requirement, such as the first sub-load 1301 in Figure 8. Alternatively, when the voltage converter connected to the first load 131 includes a BUCK, the power consumption voltage of the first load 131 connected to the BUCK can be less than 6V. For example, in order to further improve the endurance of the battery module, when the load in the range of (0, 3V) is connected to the positive electrode of the second battery cell P2 through the BUCK, the power consumption voltage of the first load 131 can be in the range of [3V, 6V), such as the fourth sub-load 1304 and the fifth sub-load 1305 in Figure 8. Alternatively, when the voltage converter connected to the first load 131 includes a BOOST, the power consumption voltage of the first load 131 connected to the BOOST can be greater than 9V, such as the seventh sub-load 1307 in Figure 8, which can boost the first battery voltage Vout1 to 12V through the first BOOST 128. Alternatively, when the voltage converter connected to the first load 131 includes a boost-buck converter, the power consumption voltage of the first load 131 connected to the boost-buck converter can be greater than or equal to 6V and less than or equal to 9V, such as the sixth sub-load 1306 in Figure 8, which boosts the first battery voltage Vout1 to 7.3V through the second boost-buck converter 129 when the first battery voltage Vout1 is lower than 7.3V, and which buck the first battery voltage Vout1 to 7.3V through the second boost-buck converter 129 when the first battery voltage Vout1 is higher than 7.3V.

[0167] It should be noted that other contents of the electronic device shown in Figure 8 can be referred to the related description of Figure 7 in the above embodiment, and will not be repeated here.

[0168] Figure 9 differs from Figure 7 in that the battery module 110 can include 2 parallel branches, each of which can include 2 series-connected battery cells. Among them, the negative electrode of the first battery cell P1 is connected to the positive electrode of the second battery cell P2 through the node A3, and the negative electrode of the third battery cell P3 is connected to the positive electrode of the fourth battery cell P4 through the node A4. In addition, in the embodiment of the present application, the node A3 and the node A4 are connected, and the node A4 is used to output the second power consumption voltage Vout2.

[0169] In addition, the contents such as the first load 131 and the second load 132 in the electronic device shown in Figure 9 can refer to the related description of the above-mentioned embodiments combined with Figure 8, and will not be repeated here.

[0170] Figure 10 shows a structure schematic diagram of another electronic device provided by the embodiments of the present application. Figure 10 differs from Figure 7 in that the battery module 110 can include 3 series-connected battery cells, i.e., the first battery cell P1 to the third battery cell P3 (i.e., a 3-in-1 power supply design scheme). In the field of notebook computers, the power between performance and thin and light computers can adopt the "3-in-1" power supply design scheme shown in Figure 10 as its power supply circuit.

[0171] In addition, the first load 131 in Figure 10 corresponds to the first load 131 and the second load 132 in Figure 7. Accordingly, the first load 131 can include a load with a large current peak value or a high dynamic response requirement, or when the voltage converter connected to the first load 131 includes a BUCK, the power consumption voltage of the first load 131 connected to the BUCK can be less than 9V. For example, in order to further improve the endurance of the battery module, when the load in the range of (0, 3V) is connected to the positive electrode of the third battery cell P3 through the BUCK, and the load in the range of [3, 6V) is connected to the positive electrode of the second battery cell P2 through the BUCK, the power consumption voltage of the first load 131 can be in the range of [6V, 9V). Or, when the voltage converter connected to the first load 131 includes a BOOST, the power consumption voltage of the first load 131 connected to the BOOST can be greater than 13.5V. Or, when the voltage converter connected to the first load 131 includes a boost-buck converter, the power consumption voltage of the first load 131 connected to the boost-buck converter can be greater than or equal to 9V and less than or equal to 13.5V.

[0172] In addition, the second load 132 in Figure 10 corresponds to the third load 133 in Figure 7, and the third load 133 in Figure 10 corresponds to the fourth load 134 in Figure 7. The related contents of the second load 132 and the third load 133 in Figure 10 can refer to the related description of the third load 133 and the fourth load 134 in Figure 7 in the above-mentioned part of the embodiments of the present application, and will not be repeated here.

[0173] FIG. 11 shows a structural schematic diagram of still another electronic device according to an embodiment of the present application. The difference between FIG. 11 and FIG. 8 is that the electronic device can further include a first switch S1 and a second switch S2. The first BUCK 121 is connected to the positive electrode of the first battery P1 through the first switch S1, and is also connected to the positive electrode of the fourth battery P4 through the second switch S2. The first switch S1 and the second switch S2 can be MOS tubes or other switching devices, and the specific type thereof is not limited.

[0174] When the task amount of the first sub-load 1301 is light, the second switch S2 is turned on, and the first switch S1 is turned off. At this time, the first BUCK 121 reduces the fourth battery voltage Vout4 to the power consumption voltage (such as 0.6V) of the first sub-load 1301.

[0175] When the task amount of the first sub-load 1301 is heavy, the second switch S2 is turned off, and the first switch S1 is turned on. At this time, the first BUCK 121 reduces the first battery voltage Vout1 to the power consumption voltage (such as 1.55V) of the first sub-load 1301.

[0176] In the embodiment, when the task amount of the first sub-load 1301 is heavy, the load power is large, and fast dynamic response is required. At this time, the first battery voltage Vout1 is used for power supply by turning on the first switch S1. Since the voltage value of the first battery voltage Vout1 is high, the input current can be reduced, and the wiring impedance does not need to be reduced by widening the wiring, the wiring difficulty of the power supply is reduced, and the safety risk of large current is avoided. When the task amount of the first sub-load 1301 is light, the load power is low, and the speed of the dynamic response is not required. At this time, the fourth battery voltage Vout2 is used for power supply by turning on the second switch S1. The power conversion efficiency of the first BUCK 121 is improved while ensuring the safety of the battery, and the endurance of the battery module is further improved.

[0177] It should be noted that the content of the embodiment of the present application can also be combined with other content of the electronic device shown in other embodiments such as FIGS. 8-10, and the specific limitation is not made.

[0178] FIG. 12 shows a structural schematic diagram of still another electronic device according to an embodiment of the present application. The difference between the electronic device shown in FIG. 12 and the electronic device shown in FIG. 7 is that the electronic device shown in FIG. 12 can further include an equalization circuit 150. The equalization circuit 150 is used for equalizing the electric quantity among the first battery P1 to the fourth battery P4.

[0179] To reduce the power loss of the battery module, the balancing circuit 150 can perform power balancing among the plurality of battery cells in an active balancing manner. For example, FIG. 13 shows a schematic diagram of an active balancing process according to an embodiment of the present application. For example, the battery module includes a first battery cell P1 and a second battery cell P2. If the power of the first battery cell P1 is 80% and the power of the second battery cell P2 is 60%, the first battery cell P1 can transfer 10% of its power to the second battery cell P2 in the balancing process, so that the power of the first battery cell P1 and the second battery cell P2 is both 70%.

[0180] In one embodiment, FIG. 14 shows a structural schematic diagram of an exemplary balancing circuit according to an embodiment of the present application. As shown in FIG. 14, for example, the battery module includes a first battery cell P1 and a third battery cell P3. The balancing circuit 150 can include a first gate driver 151, a third gate driver 153, a first control switch Q1, a twelfth control switch Q12, and a first balancing capacitor C1, a third balancing capacitor C3. Each control switch can be implemented as a MOS tube or other device with a switching function, such as the NMOS tube in FIG. 14. Accordingly, when each control switch is an NMOS tube, the control terminal of each control switch is the gate, the first connection terminal is the drain, and the second connection terminal is the source. It should be noted that each control switch can also be a PMOS tube or other control switch in addition to a MOS tube. In one example, because the voltage of each battery cell is small and the balancing circuit carries a small power, each control switch can be implemented as a small-power semiconductor switching device, such as a MOS tube with a small inter-electrode capacitance (compared to the MOS tube used in a vehicle powered by a traction battery, the inter-electrode capacitance of each control switch shown in FIG. 14 is low). In addition, each balancing capacitor can be a ceramic capacitor with ultra-low ESR (equivalent series resistance), so that each control switch can operate at a higher switching frequency (such as tens of kHz to hundreds of kHz), achieving higher balancing efficiency.

[0181] Continuing to refer to FIG. 14, the control end of the first control switch Q1 and the control end of the second control switch Q2 are connected to the first control end of the first gate driver 151, and the control end of the third control switch Q3 and the control end of the fourth control switch Q4 are connected to the second control end of the first gate driver 151. The control end of the fifth control switch Q5 and the control end of the sixth control switch Q6 are connected to the first control end of the second gate driver 152, and the control end of the seventh control switch Q7 and the control end of the eighth control switch Q8 are connected to the second control end of the second gate driver 152. The control end of the ninth control switch Q9 and the control end of the tenth control switch Q10 are connected to the first control end of the third gate driver 153, and the control end of the eleventh control switch Q11 and the control end of the twelfth control switch Q12 are connected to the second control end of the third gate driver 153. Among them, the first control end of the first gate driver 151 to the third gate driver 153 is used to output the first drive signal HO, and the second control end is used to output the second drive signal LO. For each gate driver, it can receive the control signal of the control module (CPU, SOC, etc.), modulate the voltage of the control signal, and generate the first drive signal HO and the second drive signal LO with opposite levels.

[0182] In addition, the first connection end of the first control switch Q1 is connected with the positive electrode of the first battery cell P1, and the second connection end of the first control switch Q1 is connected with the first connection end of the third control switch Q3. The second connection end of the third control switch Q3 is connected with the second connection end of the seventh control switch Q7 and the second connection end of the eleventh control switch Q11.

[0183] The first connection end of the second control switch Q2 is connected with the negative electrode of the first battery cell P1, the second connection end of the second control switch Q2 is connected with the first connection end of the fourth control switch Q4, and the second connection end of the fourth control switch Q4 is grounded GND.

[0184] The first connection end of the fifth control switch Q5 is connected with the positive electrode of the second battery cell P2, and the second connection end of the fifth control switch Q5 is connected with the first connection end of the seventh control switch Q7.

[0185] The first connection end of the sixth control switch Q6 is connected with the negative electrode of the second battery cell P2, and the second connection end of the sixth control switch Q6 is connected with the first connection end of the eighth control switch Q8. The second connection end of the eighth control switch Q8 is grounded GND.

[0186] The first connection end of the ninth control switch Q9 is connected with the positive electrode of the third battery cell P3, and the second connection end of the ninth control switch Q9 is connected with the first connection end of the eleventh control switch Q11.

[0187] The first connection end of the tenth control switch Q10 is connected with the negative electrode of the third battery P3, the second connection end of the tenth control switch Q10 is connected with the first connection end of the twelfth control switch Q12, and the second connection end of the twelfth control switch Q12 is grounded GND.

[0188] One end of the first equalization capacitor C1 is connected with the second connection end of the first control switch Q1 and the first connection end of the third control switch Q3 respectively, and the other end of the first equalization capacitor C1 is connected with the second connection end of the second control switch Q2 and the first connection end of the fourth control switch Q4 respectively.

[0189] One end of the second equalization capacitor C2 is connected with the second connection end of the fifth control switch Q5 and the first connection end of the seventh control switch Q7 respectively, and the other end of the second equalization capacitor C2 is connected with the second connection end of the sixth control switch Q6 and the first connection end of the eighth control switch Q8 respectively.

[0190] One end of the third equalization capacitor C3 is connected with the second connection end of the ninth control switch Q9 and the first connection end of the eleventh control switch Q11 respectively, and the other end of the third equalization capacitor C3 is connected with the second connection end of the tenth control switch Q10 and the first connection end of the twelfth control switch Q12 respectively.

[0191] In the embodiments of the present application, the equalization process can include the first equalization stage D1 and the second equalization stage D2 alternately. Exemplarily, FIG. 15 shows a schematic diagram of an exemplary driving signal provided by the embodiments of the present application.

[0192] In the first equalization stage D1, the first driving signal HO is high level and the second driving signal LO is low level, at this time, the first control switch Q1, the second control switch Q2, the fifth control switch Q5, the sixth control switch Q6, the ninth control switch Q9 and the tenth control switch Q10 are turned on, and the remaining control switches are turned off. At this time, in the first equalization stage D1, the equivalent circuit of the equalization circuit is shown in FIG. 16, which shows an exemplary equivalent circuit diagram of the equalization circuit provided by the embodiments of the present application. As shown in FIG. 16, in the first equalization stage, the first equalization capacitor C1 is connected in parallel to the two ends of the first battery P1, the second equalization capacitor C2 is connected in parallel to the two ends of the second battery P2, and the third equalization capacitor C3 is connected in parallel to the two ends of the third battery P3. In this stage, the batteries and the equalization capacitors charge or discharge each other until the voltage of the equalization capacitor is equal to the voltage of the connected battery.

[0193] In the second equalization stage D2, the first driving signal HO is low and the second driving signal LO is high, at this time, the third control switch Q3, the fourth control switch Q4, the seventh control switch Q7, the eighth control switch Q8, the eleventh control switch Q11 and the twelfth control switch Q12 are turned on, and other control switches are turned off. At this time, in the second equalization stage D2, the equivalent circuit of the equalization circuit is shown in FIG. 17, which shows another exemplary equivalent circuit diagram of the equalization circuit provided by the embodiment of the present application. Since the second connection end of the third control switch, the second connection end of the seventh control switch Q7 and the second connection end of the eleventh control switch Q11 are connected, the second connection end of the fourth control switch Q4, the second connection end of the eighth control switch Q8 and the second connection end of the twelfth control switch Q12 are grounded. Correspondingly, as shown in FIG. 17, in the second equalization stage D2, the first equalization capacitor C1-third equalization capacitor C3 are connected in parallel.

[0194] In the first equalization stage D1, the excess capacity of each battery cell can be transferred to the equalization capacitor connected to the battery cell, and the battery cell can obtain the missing capacity from the connected equalization capacitor. In the second equalization stage D2, the capacity can be transferred between the equalization capacitors, and the capacity of the equalization capacitor with more capacity can be transferred to the equalization capacitor with less capacity. Through the alternation of the first equalization stage D1 and the second equalization stage D2, the capacity equalization between the multiple battery cells can be dynamically performed.

[0195] In some embodiments, the switching frequency of each control switch is positively correlated with the cell voltage difference of the battery module. In one example, the control module can detect the cell voltage difference of the battery module, for example, can detect the voltage values of each cell in the battery module, and take the difference between the maximum voltage value and the minimum voltage value as the cell voltage difference of the battery module. And the control module can determine the target switching frequency corresponding to the cell voltage difference. And the control module generates a control signal (such as a pulse width modulation (PWM) signal) and sends it to each gate driver, where the signal frequency of the control signal is the same as the target switching frequency. Each gate controller generates a first drive signal HO and a second drive signal LO based on the control signal, and the signal frequency of the first drive signal HO and the second drive signal LO is the same as the target switching frequency, so as to control each control switch to turn on and off at the target switching frequency through the first drive signal HO and the second drive signal LO. Optionally, the control module can determine the target switching frequency according to the correspondence between the preset switching frequency and the cell voltage difference (such as a correspondence table, a correspondence curve, etc.). Alternatively, when the cell voltage difference is greater than the voltage difference threshold, a first switching frequency (high frequency) can be selected as the target switching frequency, and when the cell voltage difference is less than or equal to the voltage difference threshold, a second switching frequency (low frequency) can be selected as the target switching frequency, and the second switching frequency is less than the first switching frequency. The specific way of the target switching frequency is not limited in the embodiments of the application.

[0196] It should be noted that the inventors have found through research that the higher the switching frequency of each control switch, the better the balancing effect, and the higher the balancing loss caused by the gate driver. Through the embodiments, when the voltage difference is large, the balancing speed and balancing effect can be improved by increasing the switching frequency, and when the voltage difference is small, the balancing loss can be reduced by reducing the switching frequency, thereby further improving the endurance of the battery module, and balancing efficiency and battery endurance are taken into account.

[0197] And the inventors have found through research that balancing loss (such as capacitor charging and discharging loss, MOS tube driving loss) will be generated during the balancing process, and the balancing loss needs to be less than the power consumption saved by the voltage converter in the embodiments of the application to ensure the overall power utilization rate of the battery module is improved. The inventors have proved through experiments that when the switching frequency of each balancing switch is several kHz, the overall is positive compared to the balancing loss and the power consumption saved by the scheme in the embodiments of the application, which improves the battery endurance.

[0198] In some embodiments, the selection of the control switch, the capacitance parameter of the equalization capacitor can also be determined according to the loss of the equalization circuit. For example, the selection of the control switch, the switching frequency, the capacitance value of the equalization capacitor, and other equalization parameters can be determined according to the loss parameters such as the trace width of the demo of the electronic device, the impedance, and the equalization rate. For example, the higher the capacitance value of the equalization capacitor, the higher the equalization rate. For another example, the smaller the on-resistance (Rdson) of the control switch, the smaller the on-resistance loss, but the larger the inter-electrode capacitance, the larger the switching loss. Therefore, the selection of the control switch needs to balance the on-resistance loss and the switching loss, and select the optimal value in the middle to obtain the highest overall efficiency. For another example, the higher the switching frequency of the control switch, the faster the equalization speed, but it will also increase the driving loss; on the contrary, a lower switching frequency can reduce the driving loss, but it will also reduce the equalization speed, so the balance between the two can be adjusted.

[0199] In some embodiments, FIG. 18 shows a structural schematic diagram of another electronic device provided by the embodiments of the present application. The difference from FIG. 12 is that the electronic device shown in FIG. 18 further includes a third switch S3 to an eighth switch S8. The third switch S3 to the eighth switch S8 can be implemented as a switching element such as a MOS tube, without specific limitation.

[0200] One end of the third switch S3 and one end of the sixth switch S6 are connected with the node B1, the other end of the third switch S3 is connected with the positive electrode of the second battery P2, and the other end of the sixth switch S6 is connected with the positive electrode of the first battery P1. The input end of the sixth BUCK 126 is connected with the node B1.

[0201] One end of the fourth switch S4 and one end of the seventh switch S7 are connected with the node B2, the other end of the fourth switch S4 is connected with the positive electrode of the third battery P3, and the other end of the seventh switch S7 is connected with the positive electrode of the first battery P1. The input end of the fourth BUCK 124 and the input end of the fifth BUCK 125 are connected with the node B2.

[0202] One end of the fifth switch S5 and one end of the eighth switch S8 are connected with the node B3, the other end of the fifth switch S5 is connected with the positive electrode of the fourth battery P4, and the other end of the eighth switch S8 is connected with the positive electrode of the first battery P1. The input end of the second BUCK 122 and the input end of the third BUCK 123 are connected with the node B3.

[0203] In the normal power supply case, the third switch S3 and the fifth switch S5 are turned on, and the sixth switch S6 and the eighth switch S8 are turned off. In addition, when the voltage difference between the second cell P2 and other cells is greater than or equal to a preset voltage difference threshold, the third switch S3 is turned off, and the sixth switch S6 is turned on, so as to avoid the sixth sub-load 1306 from further increasing the voltage difference between the second cell P2 and the first cell P1, thereby improving the voltage balancing efficiency.

[0204] In addition, when the voltage difference between the third cell P3 and other cells is greater than or equal to a preset voltage difference threshold, the fourth switch S4 is turned off, and the seventh switch S7 is turned on, so as to avoid the fourth sub-load 1304 and the fifth sub-load 1305 from further increasing the voltage difference between the third cell P3 and other cells, thereby improving the balancing efficiency. Alternatively, when the voltage difference between the third cell P3 and other cells is greater than or equal to a preset voltage difference threshold, the third switch S3 can also be controlled to be turned off, and the sixth switch S6 can be controlled to be turned on. It should be noted that the fourth sub-load 1304 and the fifth sub-load 1305 can also be connected to the positive electrode of the second cell P2 through other switches, so that, in addition to the third load being hung to the positive electrode of the first cell P1, the third load can also be hung to the second cell P2, and no specific limitation is made to this.

[0205] In addition, when the voltage difference between the fourth cell P4 and other cells is greater than or equal to a preset voltage difference threshold, the fifth switch S5 is turned off, and the eighth switch S8 is turned on, so as to avoid the second sub-load 1302 and the third sub-load 1303 from further increasing the voltage difference between the fourth cell P4 and other cells, thereby improving the balancing efficiency. Alternatively, when the voltage difference between the fourth cell P4 and other cells is greater than or equal to a preset voltage difference threshold, the third switch S3 can also be controlled to be turned off, and the sixth switch S6 can be controlled to be turned on. Alternatively, the fourth switch S4 can also be controlled to be turned off, and the seventh switch S7 can be controlled to be turned on, so as to further improve the balancing effect. It should be noted that the second sub-load 1302 and the third sub-load 1303 can also be connected to the positive electrode of the second cell P2 or the third cell P3 through other switches, so that, in addition to the fourth load being hung to the positive electrode of the first cell P1, the fourth load can also be hung to the second cell P2 or the third cell P3, and no specific limitation is made to this.

[0206] Alternatively, when the equalization speed is slow, the equalization speed can be improved through the above-mentioned switching process. For example, as the voltage difference between the cells gradually decreases, the equalization speed decreases, and through the above-mentioned switching process, for example, in the case where the voltage difference between the second cell P2 and the first cell P1 is less than the voltage difference threshold, the sixth switch S6 is turned on and the third switch S3 is turned off to improve the equalization speed. It should be noted that in this process, for the load that needs to be connected to other cells, such as the fourth load, the voltage converter connected thereto can be connected to the second cell P2 or the third cell P3 according to actual conditions and specific needs, and no specific limitation is made thereto.

[0207] In the present embodiment, since the power consumption of each cell in the battery module is different, for example, taking the first cell P1 to the fourth cell P4 as an example, the first cell P1 only needs to provide power for the first load 131, the second cell P2 needs to provide power for the first load 131 and the second load 132, the third cell P3 needs to provide power for the first load 131 to the third load 133, and the fourth cell P4 needs to provide power for the first load 131 to the fourth load 134. The power consumption of the first cell P1 to the fourth cell P4 gradually increases, and correspondingly, the voltage difference between the cells may be generated due to the difference in power consumption, and further, the risk of short circuit caused by the voltage difference. Therefore, by setting the equalization circuit, the voltage difference between the cells can be reduced, and the safety of the power supply is improved. In addition, when the active equalization circuit shown in FIG. 14 is selected, since the electric energy is stored in the capacitor, the heat consumption is reduced, and the active equalization current is large and the equalization rate is high, which improves the battery endurance while improving the equalization rate. In addition, passive equalization can also be selected according to actual conditions and specific needs, and no specific limitation is made thereto.

[0208] It should be noted that the equalization scheme can also be applied to other power supply design schemes such as "4 in series 1 in parallel", "2 in series 1 in parallel", and "2 in series 2 in parallel". For example, in the schemes of "2 in series 1 in parallel" and "2 in series 2 in parallel", the equalization circuit can include the first equalization capacitor C1 and the second equalization capacitor C2, the first control switch Q1 to the eighth control switch Q8, the first gate driver 151 and the second gate driver 152. For example, in the scheme of "4 in series 1 in parallel", the equalization circuit can include the first equalization capacitor C1 to the fourth equalization capacitor C4, the first control switch Q1 to the sixteenth control switch Q16, the first gate driver 151 to the fourth gate driver 154, and the specific circuit structure and equalization process are similar to the above-mentioned equalization circuit, and no further description is made thereto.

[0209] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application; although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A power supply circuit provided in an electronic device, the power supply circuit comprising: a battery module comprising at least one power supply branch, each power supply branch comprising a first cell and a second cell, wherein a negative electrode of the first cell and a positive electrode of the second cell in each power supply branch are connected, a positive electrode of the first cell is configured to output a first battery voltage, and a positive electrode of the second cell is configured to output a second battery voltage; a first voltage converter having an input end connected to the positive electrode of the first cell and an output end configured to be connected to a first load, the first voltage converter being configured to convert the first battery voltage into a first power consumption voltage and output the first power consumption voltage to the first load; a second voltage converter having an input end connected to the positive electrode of the second cell and an output end configured to be connected to a second load, the second voltage converter being configured to convert the second battery voltage into a second power consumption voltage and output the second power consumption voltage to the second load, wherein a first absolute difference between the second battery voltage and the second power consumption voltage is smaller than a second absolute difference between the first battery voltage and the second power consumption voltage.

2. The power supply circuit of claim 1, wherein, each power supply branch further comprises a third cell, wherein a positive electrode of the third cell is connected to a negative electrode of the second cell, and the positive electrode of the third cell is configured to output a third battery voltage; the power supply circuit further comprises: a third voltage converter having an input end connected to the positive electrode of the third cell and an output end configured to be connected to a third load, the third voltage converter being configured to convert the third battery voltage into a third power consumption voltage and output the third power consumption voltage to the third load, wherein a third absolute difference between the third battery voltage and the third power consumption voltage is smaller than a fourth absolute difference between the second battery voltage and the third power consumption voltage.

3. The power supply circuit according to claim 2, wherein the second voltage converter comprises a first step-down converter, the second power consumption voltage is smaller than a minimum voltage value of the second battery voltage and greater than or equal to a minimum voltage value of a third battery voltage; the third voltage converter comprises a second step-down converter, the third power consumption voltage is smaller than a minimum voltage value of the third battery voltage.

4. The power supply circuit of claim 2, wherein, each power supply branch further comprises a fourth cell, wherein a positive electrode of the fourth cell is connected to a negative electrode of the third cell, and the positive electrode of the fourth cell is configured to output a fourth battery voltage; the power supply circuit further comprises: a fourth voltage converter having an input end connected to the positive electrode of the fourth cell and an output end configured to be connected to a fourth load, the fourth voltage converter being configured to convert the fourth battery voltage into a fourth power consumption voltage and output the fourth power consumption voltage to the fourth load, The sixth absolute difference between the fourth battery voltage and the fourth power voltage is less than the seventh absolute difference between the first battery voltage and the fourth battery voltage.

5. The power supply circuit of claim 4, wherein, The second voltage converter comprises a first step-down converter, the second power voltage is less than a minimum voltage value of the second battery voltage and greater than or equal to a minimum voltage value of a third battery voltage; The third voltage converter comprises a second step-down converter, the third power voltage is less than a minimum voltage value of the third battery voltage and greater than or equal to a minimum voltage value of the fourth battery voltage; The fourth voltage converter comprises a third step-down converter, the fourth power voltage is less than a minimum voltage value of the fourth battery voltage.

6. The power supply circuit of claim 1, wherein, The first load comprises a first sub-load, and the second load comprises a second sub-load, the power voltage of the first sub-load and the power voltage of the second sub-load are both less than the second battery voltage, The load current of the first sub-load is greater than the load current of the second sub-load, and / or the dynamic response rate of the first sub-load is greater than the dynamic response rate of the second sub-load.

7. The power supply circuit of claim 1, wherein, The first load comprises a first sub-load, and the first voltage converter comprises a first voltage conversion element, wherein the first voltage conversion element is used to be connected with the first sub-load, and the power supply circuit further comprises: A first switch, a first connection end of the first switch is connected with the positive electrode of the first battery cell, and a second connection end of the first switch is connected with an input end of the first voltage conversion element; A second switch, a first connection end of the second switch is connected with the positive electrode of the second battery cell, and a second connection end of the second switch is connected with the input end of the first voltage conversion element; In the case that the first sub-load is in a first state, the first switch is turned on, and the second switch is turned off; In the case that the first sub-load is in a second state, the first switch is turned off, and the second switch is turned on.

8. The power supply circuit of any one of claims 1-7, wherein, The power supply circuit further comprises a balancing circuit, the balancing circuit is connected with the first battery cell and the second battery cell respectively, and is used to balance the electric quantity of the first battery cell and the second battery cell.

9. The power supply circuit of claim 8, wherein, The balancing circuit comprises: A first control switch, a first connection end of the first control switch is connected with the positive electrode of the first battery cell, and a second connection end of the first control switch is connected with a first connection end of a third control switch; A second control switch, a first connection end of the second control switch is connected with the negative electrode of the first battery cell, and a second connection end of the second control switch is connected with a first connection end of a fourth control switch; The third control switch, a second connection end of the third control switch is connected with a second connection end of a seventh control switch; The fourth control switch, a second connection end of the fourth control switch is grounded; A fifth control switch, a first connection end of the fifth control switch is connected with the positive electrode of the second battery cell, and a second connection end of the fifth control switch is connected with a first connection end of the seventh control switch; a sixth control switch, a first connection end of the sixth control switch is connected with the negative electrode of the second battery cell, and a second connection end of the sixth control switch is connected with a first connection end of an eighth control switch; a seventh control switch; an eighth control switch, a second connection end of the eighth control switch is grounded; a first equalization capacitor, a first end of the first equalization capacitor is connected with the second connection end of the first control switch and the first connection end of the third control switch respectively, and a second end of the first equalization capacitor is connected with the second connection end of the second control switch and the first connection end of the fourth control switch respectively; a second equalization capacitor, a first end of the second equalization capacitor is connected with the second connection end of the fifth control switch and the first connection end of the seventh control switch respectively, and a second end of the second equalization capacitor is connected with the second connection end of the sixth control switch and the first connection end of the eighth control switch respectively; wherein, during the equalization process of the equalization circuit, a first equalization stage and a second equalization stage are alternately entered, in the first equalization stage, the first control switch, the second control switch, the fifth control switch and the sixth control switch are turned on, and the third control switch, the fourth control switch, the seventh control switch and the eighth control switch are turned off; in the second equalization stage, the first control switch, the second control switch, the fifth control switch and the sixth control switch are turned off, and the third control switch, the fourth control switch, the seventh control switch and the eighth control switch are turned on.

10. The power supply circuit of claim 9, wherein, the switching frequency of the first control switch to the eighth control switch is positively correlated with the voltage difference between the first battery cell and the second battery cell.

11. A power supply circuit, the power supply circuit is arranged in an electronic device, the power supply circuit comprising: a battery module, the battery module comprises at least one power supply branch, each power supply branch comprises a first battery cell and a second battery cell, wherein the negative electrode of the first battery cell and the positive electrode of the second battery cell in each power supply branch are connected, the positive electrode of the first battery cell is used for outputting a first battery voltage, and the positive electrode of the second battery cell is used for outputting a second battery voltage; a first voltage converter, an input end of the first voltage converter is connected with the positive electrode of the first battery cell, an output end of the first voltage converter is used for being connected with a first load, and the first voltage converter is used for converting the first battery voltage into a first power consumption voltage and outputting the first power consumption voltage to the first load; a second voltage converter, an input end of the second voltage converter is connected with the positive electrode of the second battery cell, an output end of the second voltage converter is used for being connected with a second load, and the second voltage converter is used for converting the second battery voltage into a second power consumption voltage and outputting the second power consumption voltage to the second load, wherein, a first absolute difference value between the second battery voltage and the second power consumption voltage is smaller than a second absolute difference value between the first battery voltage and the second power consumption voltage. and each of the power supply branches further comprises a third electric core, wherein a positive pole of the third electric core is connected with a negative pole of the second electric core, and the positive pole of the third electric core is used for outputting a third battery voltage; the power supply circuit further comprises: a third voltage converter, an input end of the third voltage converter is connected with the positive pole of the third electric core, and an output end of the third voltage converter is used for being connected with a third load, the third voltage converter is used for converting the third battery voltage into a third power consumption voltage, and outputting the third power consumption voltage to the third load, wherein a third absolute difference between the third battery voltage and the third power consumption voltage is less than a fourth absolute difference between the second battery voltage and the third power consumption voltage; the second voltage converter comprises a first step-down converter, the second power consumption voltage is less than a minimum voltage value of the second battery voltage and greater than or equal to a minimum voltage value of the third battery voltage; the third voltage converter comprises a second step-down converter, the third power consumption voltage is less than a minimum voltage value of the third battery voltage.

12. The power supply circuit of claim 11, wherein, each of the power supply branches further comprises a fourth electric core, wherein a positive pole of the fourth electric core is connected with a negative pole of the third electric core, and the positive pole of the fourth electric core is used for inputting a fourth battery voltage; the power supply circuit further comprises: a fourth voltage converter, an input end of the fourth voltage converter is connected with the positive pole of the fourth electric core, and an output end of the fourth voltage converter is used for being connected with a fourth load, the fourth voltage converter is used for converting the fourth battery voltage into a fourth power consumption voltage, and outputting the fourth power consumption voltage to the fourth load, wherein a sixth absolute difference between the fourth battery voltage and the fourth power consumption voltage is less than a seventh absolute difference between the first battery voltage and the fourth battery voltage.

13. The power supply circuit according to claim 12, wherein the second voltage converter comprises a first step-down converter, the second power consumption voltage is less than a minimum voltage value of the second battery voltage and greater than or equal to a minimum voltage value of the third battery voltage; the third voltage converter comprises a second step-down converter, the third power consumption voltage is less than a minimum voltage value of the third battery voltage and greater than or equal to a minimum voltage value of the fourth battery voltage; the fourth voltage converter comprises a third step-down converter, the fourth power consumption voltage is less than a minimum voltage value of the fourth battery voltage.

14. The power supply circuit of claim 11, wherein, the first load comprises a first sub-load, the second load comprises a second sub-load, and power consumption voltages of the first sub-load and the second sub-load are both less than the second battery voltage, a load current of the first sub-load is greater than a load current of the second sub-load, and / or a dynamic response rate of the first sub-load is greater than a dynamic response rate of the second sub-load.

15. The power supply circuit of claim 11, wherein, the first load comprises a first sub-load, the first voltage converter comprises a first voltage conversion element, the first voltage conversion element is used for being connected with the first sub-load, and the power supply circuit further comprises: a first switch, a first connection end of the first switch being connected with a positive electrode of the first battery cell, a second connection end of the first switch being connected with an input end of the first voltage conversion element; a second switch, a first connection end of the second switch being connected with a positive electrode of the second battery cell, a second connection end of the second switch being connected with the input end of the first voltage conversion element; in a case where the first sub-load is in a first state, the first switch is turned on, and the second switch is turned off; in a case where the first sub-load is in a second state, the first switch is turned off, and the second switch is turned on.

16. The power supply circuit according to any one of claims 11-15, wherein the power supply circuit further comprises a balancing circuit, the balancing circuit being connected with the first battery cell and the second battery cell respectively, for balancing electric quantity of the first battery cell and the second battery cell.

17. The power supply circuit of claim 16, wherein, the balancing circuit comprises: a first control switch, a first connection end of the first control switch being connected with the positive electrode of the first battery cell, a second connection end of the first control switch being connected with a first connection end of a third control switch; a second control switch, a first connection end of the second control switch being connected with a negative electrode of the first battery cell, a second connection end of the second control switch being connected with a first connection end of a fourth control switch; the third control switch, a second connection end of the third control switch being connected with a second connection end of a seventh control switch; the fourth control switch, a second connection end of the fourth control switch being grounded; a fifth control switch, a first connection end of the fifth control switch being connected with a positive electrode of the second battery cell, a second connection end of the fifth control switch being connected with a first connection end of the seventh control switch; a sixth control switch, a first connection end of the sixth control switch being connected with a negative electrode of the second battery cell, a second connection end of the sixth control switch being connected with a first connection end of an eighth control switch; the seventh control switch; the eighth control switch, a second connection end of the eighth control switch being grounded; a first balancing capacitor, a first end of the first balancing capacitor being connected with the second connection end of the first control switch and the first connection end of the third control switch respectively, a second end of the first balancing capacitor being connected with the second connection end of the second control switch and the first connection end of the fourth control switch respectively; a second balancing capacitor, a first end of the second balancing capacitor being connected with the second connection end of the fifth control switch and the first connection end of the seventh control switch respectively, a second end of the second balancing capacitor being connected with the second connection end of the sixth control switch and the first connection end of the eighth control switch respectively; In the equalization process of the equalization circuit, the first equalization stage and the second equalization stage are alternately entered, in the first equalization stage, the first control switch, the second control switch, the fifth control switch and the sixth control switch are turned on, and the third control switch, the fourth control switch, the seventh control switch and the eighth control switch are turned off; in the second equalization stage, the first control switch, the second control switch, the fifth control switch and the sixth control switch are turned off, and the third control switch, the fourth control switch, the seventh control switch and the eighth control switch are turned on.

18. The power supply circuit of claim 17, wherein, The switching frequency of the first control switch to the eighth control switch is positively correlated with the voltage difference between the first battery cell and the second battery cell.

19. A power supply circuit, the power supply circuit is arranged in an electronic device, the power supply circuit comprises: a battery module, the battery module comprises at least one power supply branch, each power supply branch comprises a first battery cell, a second battery cell and a third battery cell, wherein the negative electrode of the first battery cell and the positive electrode of the second battery cell in each power supply branch are connected, the negative electrode of the second battery cell and the positive electrode of the third battery cell are connected, the positive electrode of the first battery cell is used to output a first battery voltage, the positive electrode of the second battery cell is used to output a second battery voltage, and the positive electrode of the third battery cell is used to output a third battery voltage; a first voltage converter, an input end of the first voltage converter is connected with the positive electrode of the first battery cell, an output end of the first voltage converter is used to be connected with a first load, and the first voltage converter is used to convert the first battery voltage into a first power consumption voltage and output the first power consumption voltage to the first load; a second voltage converter, an input end of the second voltage converter is connected with the positive electrode of the second battery cell, an output end of the second voltage converter is used to be connected with a second load, and the second voltage converter is used to convert the second battery voltage into a second power consumption voltage and output the second power consumption voltage to the second load, a third voltage converter, an input end of the third voltage converter is connected with the positive electrode of the third battery cell, an output end of the third voltage converter is used to be connected with a third load, and the third voltage converter is used to convert the third battery voltage into a third power consumption voltage and output the third power consumption voltage to the third load, wherein the second voltage converter comprises a first step-down converter, the second power consumption voltage is less than the minimum voltage value of the second battery voltage and greater than or equal to the minimum voltage value of the third battery voltage; the third voltage converter comprises a second step-down converter, and the third power consumption voltage is less than the minimum voltage value of the third battery voltage.

20. The power supply circuit of claim 19, wherein, The first absolute difference between the second battery voltage and the second power consumption voltage is less than the second absolute difference between the first battery voltage and the second power consumption voltage.

21. The power supply circuit of claim 19 or 20, wherein, The first absolute difference between the second battery voltage and the second power consumption voltage is less than the second absolute difference between the first battery voltage and the second power consumption voltage. The first absolute difference between the second battery voltage and the second power consumption voltage is less than the second absolute difference between the first battery voltage and the second power consumption voltage.

22. The power supply circuit of claim 19, wherein, The fourth electric core is connected with the negative pole of the third electric core, and the positive pole of the fourth electric core is used for inputting a fourth battery voltage; The power supply circuit further comprises: a fourth voltage converter, an input end of the fourth voltage converter is connected with the positive pole of the fourth electric core, an output end of the fourth voltage converter is used for being connected with a fourth load, the fourth voltage converter is used for converting the fourth battery voltage into a fourth power consumption voltage, and outputting the fourth power consumption voltage to the fourth load, wherein a sixth absolute difference between the fourth battery voltage and the fourth power consumption voltage is less than a seventh absolute difference between the first battery voltage and the fourth battery voltage.

23. The power supply circuit according to claim 22, wherein the third power consumption voltage is less than the minimum voltage value of the third battery voltage and greater than or equal to the minimum voltage value of the fourth battery voltage; the fourth voltage converter comprises a third step-down converter, and the fourth power consumption voltage is less than the minimum voltage value of the fourth battery voltage.

24. The power supply circuit of claim 19, wherein, The first load comprises a first sub-load, and the second load comprises a second sub-load, and the power consumption voltage of the first sub-load and the power consumption voltage of the second sub-load are both less than the second battery voltage, the load current of the first sub-load is greater than the load current of the second sub-load, and / or the dynamic response rate of the first sub-load is greater than the dynamic response rate of the second sub-load.

25. The power supply circuit of claim 19, wherein, The first load comprises a first sub-load, and the first voltage converter comprises a first voltage conversion element, the first voltage conversion element is used for being connected with the first sub-load, and the power supply circuit further comprises: a first switch, a first connection end of the first switch is connected with the positive pole of the first electric core, and a second connection end of the first switch is connected with an input end of the first voltage conversion element; a second switch, a first connection end of the second switch is connected with the positive pole of the second electric core, and a second connection end of the second switch is connected with the input end of the first voltage conversion element; in the case that the first sub-load is in a first state, the first switch is turned on, and the second switch is turned off; in the case that the first sub-load is in a second state, the first switch is turned off, and the second switch is turned on.

26. The power supply circuit according to any one of claims 19-25, wherein the power supply circuit further comprises an equalization circuit, the equalization circuit is connected with the first electric core, the second electric core and the third electric core respectively, and is used for performing electric quantity equalization on the first electric core and the second electric core.

27. The power supply circuit of claim 26, wherein, The equalization circuit comprises: a first control switch, a first connection end of the first control switch is connected with the positive pole of the first electric core, and a second connection end of the first control switch is connected with a first connection end of a third control switch; a second control switch, a first connection end of the second control switch is connected with the negative pole of the first electric core, and a second connection end of the second control switch is connected with a first connection end of a fourth control switch; The second connection end of the third control switch is connected with the second connection end of the seventh control switch; The fourth control switch, the second connection end of the fourth control switch is grounded; The fifth control switch, the first connection end of the fifth control switch is connected with the positive electrode of the second electric core, and the second connection end of the fifth control switch is connected with the first connection end of the seventh control switch; The sixth control switch, the first connection end of the sixth control switch is connected with the negative electrode of the second electric core, and the second connection end of the sixth control switch is connected with the first connection end of the eighth control switch; The seventh control switch; The eighth control switch, the second connection end of the eighth control switch is grounded; The ninth control switch, the first connection end of the ninth control switch is connected with the positive electrode of the third electric core, and the second connection end of the ninth control switch is connected with the first connection end of the eleventh control switch; The tenth control switch, the first connection end of the tenth control switch is connected with the negative electrode of the third electric core, and the second connection end of the tenth control switch is connected with the first connection end of the twelfth control switch; The eleventh control switch; The twelfth control switch, the second connection end of the twelfth control switch is grounded; The first equalization capacitor, the first end of the first equalization capacitor is connected with the second connection end of the first control switch and the first connection end of the third control switch respectively, and the second end of the first equalization capacitor is connected with the second connection end of the second control switch and the first connection end of the fourth control switch respectively; The second equalization capacitor, the first end of the second equalization capacitor is connected with the second connection end of the fifth control switch and the first connection end of the seventh control switch respectively, and the second end of the second equalization capacitor is connected with the second connection end of the sixth control switch and the first connection end of the eighth control switch respectively; The third equalization capacitor, the first end of the third equalization capacitor is connected with the second connection end of the ninth control switch and the first connection end of the eleventh control switch respectively, and the second end of the third equalization capacitor is connected with the second connection end of the tenth control switch and the first connection end of the twelfth control switch respectively; Wherein, in the equalization process of the equalization circuit, the first equalization stage and the second equalization stage are alternately entered, in the first equalization stage, the first control switch, the second control switch, the fifth control switch, the sixth control switch, the ninth control switch and the tenth control switch are turned on, and the third control switch, the fourth control switch, the seventh control switch, the eighth control switch, the eleventh control switch and the twelfth control switch are turned off; in the second equalization stage, the first control switch, the second control switch, the fifth control switch, the ninth control switch and the tenth control switch are turned off, and the third control switch, the fourth control switch, the seventh control switch, the eighth control switch, the eleventh control switch and the twelfth control switch are turned on.

28. The power supply circuit of claim 27, wherein, The switching frequency of the first control switch to the twelfth control switch is positively correlated with the voltage difference between the first electric core to the third electric core.

29. An electronic device comprising: a power supply circuit, wherein the power supply circuit is the power supply circuit of any one of claims 1-10, or the power supply circuit is the power supply circuit of any one of claims 11-18, or the power supply circuit is the power supply circuit of any one of claims 19-28; a first load; a second load.

30. The electronic device of claim 29, wherein the electronic device is a laptop computer.

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