Power supply circuit, chip, electronic device, and voltage conversion method

Abstract

Embodiments of the present application disclose a power supply circuit, a chip, an electronic device, and a voltage conversion method. The power supply circuit (300) comprises: a battery module (310), comprising a first battery (312) and a second battery (314) that are connected in series; a charge pump circuit (320); and an adjustment module (330). The charge pump circuit (320) is used for performing first conversion processing on a first voltage inputted to the charge pump circuit (320), so as to obtain a second voltage, and outputting the second voltage to the adjustment module (330), so that on the basis of the second voltage, the adjustment module (330) enables the battery voltage of the first battery (312) and the battery voltage of the second battery (314) to tend to be identical; and / or is used for performing second conversion processing on a third voltage outputted by the adjustment module (330) so as to obtain a fourth voltage, and outputting the fourth voltage to the battery module (310), so that the battery voltage of the first battery (312) and the battery voltage of the second battery (314) tend to be identical.

Description

Power supply circuit, chip, electronic device and voltage conversion method

[0001] This application claims priority to the Chinese patent application filed on March 18, 2024, with application number 202410311324.0 and invention name “Power supply circuit, chip, electronic device and voltage conversion method”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of electronic circuit technology, and in particular to a power supply circuit, a chip, an electronic device, and a voltage conversion method. Background Art

[0003] With the advancement of battery technology, traditional single-battery power systems can no longer meet the needs of electronic devices. Consequently, more and more electronic devices are adopting multi-battery power architectures. Because different batteries may have inconsistent cells, and as they age and their internal resistance increases, the differences between multiple cells can become increasingly significant. This can lead to unbalanced voltages across multiple batteries, severely impacting their lifespan. Therefore, battery balancing is necessary. Summary of the Invention

[0004] The embodiments of the present application disclose a power supply circuit, a chip, an electronic device, and a voltage conversion method, which can achieve battery voltage balancing between a first battery and a second battery and improve the working efficiency of an adjustment module.

[0005] The present application discloses a power supply circuit, including:

[0006] A battery module comprising a first battery and a second battery connected in series;

[0007] a charge pump circuit, wherein a first end of the charge pump circuit is connected to the battery module;

[0008] an adjustment module, connected to the first battery, the second battery, and the second end of the charge pump circuit respectively;

[0009] The charge pump circuit is used to perform a first conversion process on a first voltage input to the charge pump circuit to obtain a second voltage, and output the second voltage to the adjustment module, so that the adjustment module makes the battery voltages of the first battery and the second battery tend to be the same according to the second voltage; and / or, to perform a second conversion process on a third voltage output by the adjustment module to obtain a fourth voltage, and output the fourth voltage to the battery module, so that the battery voltages of the first battery and the second battery tend to be the same.

[0010] An embodiment of the present application discloses a chip, including the power supply circuit described above.

[0011] An embodiment of the present application discloses an electronic device, including the power supply circuit as described above, or including the chip as described above.

[0012] The present application discloses a voltage conversion method, which includes:

[0013] performing a first conversion process on a first voltage input to the charge pump circuit by the charge pump circuit to obtain a second voltage, and outputting the second voltage to the adjustment module, so that the adjustment module makes the battery voltages of the first battery and the second battery of the battery module tend to be the same according to the second voltage; and / or,

[0014] The third voltage output by the adjustment module is subjected to a second conversion process by a charge pump circuit to obtain a fourth voltage, and the fourth voltage is output to the battery module, so that the battery voltages of the first battery and the second battery tend to be the same.

[0015] The details of one or more embodiments of the present application are set forth in the following drawings and description. Other features and advantages of the present application will be apparent from the description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] FIG1A is a circuit diagram of a passive equalization technology in the related art;

[0018] FIG1B is a circuit diagram of an active balancing technology using a Buck-Boost circuit in the related art;

[0019] FIG1C is a circuit diagram of an active equalization technology using a Flyback circuit in the related art;

[0020] FIG1D is a circuit diagram of an active balancing technology using a bidirectional Buck-Boost circuit in the related art;

[0021] FIG2A is a circuit diagram of a dual-battery power supply system in the related art;

[0022] FIG2B is another circuit diagram of a dual-battery power supply system in the related art;

[0023] FIG3 is a structural block diagram of a power supply circuit in one embodiment;

[0024] FIG4A is a schematic diagram of the circuit structure and energy transmission of a power supply circuit in one embodiment;

[0025] FIG4B is a schematic diagram of the circuit structure and energy transmission of a power supply circuit in another embodiment;

[0026] FIG4C is a schematic diagram of the circuit structure and energy transmission of a power supply circuit in another embodiment;

[0027] FIG5 is a structural block diagram of a power supply circuit in another embodiment;

[0028] FIG6A is a schematic diagram of the circuit structure and energy transmission of a power supply circuit in another embodiment;

[0029] FIG6B is a schematic diagram of the circuit structure and energy transmission of a power supply circuit in another embodiment;

[0030] FIG7 is a schematic diagram of the circuit structure and energy transmission of a power supply circuit in another embodiment;

[0031] FIG8 is a block diagram of a chip structure in one embodiment;

[0032] FIG9 is a flow chart of a voltage conversion method according to an embodiment. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0034] It should be noted that the terms "including," "having," and any variations thereof in the embodiments and drawings of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to the process, method, product, or apparatus.

[0035] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element. For example, without departing from the scope of this application, the first battery may be referred to as the second battery, and similarly, the second battery may be referred to as the first battery. The first battery and the second battery are both batteries, but they are not the same battery. The term "multiple" used in this application refers to two or more. The term "and / or" used in this application refers to one of the solutions, or any combination of multiple solutions. The term "connected" used in this application should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0036] With the advancement of battery technology, traditional single-battery power systems can no longer meet the needs of electronic devices. Consequently, more and more electronic devices are adopting multi-battery power architectures. Because different batteries may have inconsistent cell characteristics, and as batteries age and their internal resistance increases, the differences between multiple cells can become increasingly significant. Therefore, a technology called cell balancing is required to achieve voltage balance across multiple batteries.

[0037] Currently, battery balancing technology is primarily used in multi-cell power supply systems, such as electric vehicle battery packs, electric vehicle battery packs, and laptop batteries. Current battery balancing technologies in the industry are primarily divided into passive balancing and active balancing technologies.

[0038] Passive balancing technology discharges high-voltage batteries through resistors. As shown in Figure 1A, the high-voltage batteries are discharged using resistors, and the electricity is lost in the form of heat. This achieves battery voltage balancing for multiple series-connected batteries and ensures their normal operation. This method is low-cost, but also low-efficiency.

[0039] Active balancing technology uses switching power supply technology to transfer energy from a high-voltage battery to a low-voltage battery. For example, a Buck-Boost circuit as shown in Figure 1B, a Flyback circuit as shown in Figure 1C, or a bidirectional Buck-Boost circuit as shown in Figure 1D can be used to transfer energy from a high-voltage battery to a low-voltage battery, achieving battery voltage balancing for multiple series-connected batteries. This method has low energy loss and high efficiency, making it the currently mainstream balancing technology.

[0040] For electronic devices with multiple battery power supply systems, there are mainly two situations. One is that when the device leaves the factory, multiple batteries with battery characteristics as close as possible are selected without using battery balancing technology. In this situation, as the batteries age, the deviations between different batteries will increase, seriously affecting the battery life. For example, when charging, one battery may be fully charged while another is not, resulting in a situation where full charging cannot be achieved. Or, when discharging, one battery may still have a lot of power while the other is empty, making charging and discharging impossible.

[0041] Another approach is to use an active balancing technology using a bidirectional Buck-Boost circuit to balance multiple batteries. For example, as shown in FIG2A , for a dual-battery powered system, a bidirectional Buck-Boost circuit is used to balance the battery voltages of battery BAT1 and battery BAT2. The bidirectional Buck-Boost circuit may include a switch Q1, a switch Q2, an inductor L1, and a capacitor C1. The bidirectional Buck-Boost circuit can transfer energy from battery BAT1 to battery BAT2, and vice versa, thereby balancing the battery voltages of battery BAT1 and battery BAT2.

[0042] For electronic devices using a multi-battery power supply system, since the load of the electronic device is generally still powered by a single battery voltage range, a step-down circuit is required to reduce the multi-battery voltage output by the multi-battery power supply system to within the range of a single battery voltage. For example, as shown in FIG2B , for a dual-battery power supply system, a 2:1 charge pump (CP) circuit can be used to perform a 2:1 step-down process on the battery voltages provided by battery BAT1 and battery BAT2 to obtain a supply voltage within the single battery voltage range and provide it to the load.

[0043] In the current active balancing technology of a bidirectional Buck-Boost circuit, when it is necessary to transfer energy from battery BAT1 to battery BAT2, the bidirectional Buck-Boost circuit directly reduces the dual-battery voltage (such as VBAT12 in FIG. 2B ) to the single-battery voltage (such as VBAT2 in FIG. 2B ) and provides power to battery BAT2. When it is necessary to transfer energy from battery BAT2 to battery BAT1, the bidirectional Buck-Boost circuit directly increases the single-battery voltage (such as VBAT2 in FIG. 2B ) to the dual-battery voltage (such as VBAT12 in FIG. 2B ). The voltage difference between the input and output of the bidirectional Buck-Boost circuit is large, resulting in a small duty cycle when switch Q1 is on. This results in high switch losses in the bidirectional Buck-Boost circuit and low operating efficiency.

[0044] The embodiments of the present application disclose a power supply circuit, a chip, an electronic device, and a voltage conversion method, which can achieve battery voltage balancing between a first battery and a second battery and improve the working efficiency of an adjustment module.

[0045] As shown in FIG3 , in one embodiment, a power supply circuit 300 is provided. The power supply circuit 300 may include a battery module 310, a charge pump circuit 320, and an adjustment module 330. A first end of the charge pump circuit 320 may be connected to the battery module 310, and a second end of the charge pump circuit 320 may be connected to the adjustment module 330. In some embodiments, the second end of the charge pump circuit 320 may also be connected to a power supply output end, which may be connected to a load, and the charge pump circuit 320 may supply power to the load.

[0046] The battery module 310 includes a first battery 312 and a second battery 314 connected in series.

[0047] The adjustment module 330 may also be connected to the first battery 312 and the second battery 314 respectively. Further, the adjustment module 330 may be connected to the midpoint of the first battery 312 and the second battery 314 .

[0048] The adjustment module 330 can be used to make the battery voltages of the first battery 312 and the second battery 314 approach the same.

[0049] The adjustment module 330 causes the battery voltages of the first battery 312 and the second battery 314 to approach the same level, which may refer to placing the first battery 312 and the second battery 314 in a voltage equilibrium state. The voltage equilibrium state may refer to placing the battery voltages of the first battery 312 and the second battery 314 in a relatively balanced state. Furthermore, in the voltage equilibrium state, the first battery voltage of the first battery 312 and the second battery voltage of the second battery 314 are equal to or very close to each other (e.g., the voltage difference between the first battery voltage of the first battery 312 and the second battery voltage of the second battery 314 is less than a voltage threshold).

[0050] In some embodiments, the adjustment module 330 may be a circuit supporting bidirectional energy transfer, and may transfer energy from the first battery 312 to the second battery 314, or may transfer energy from the second battery 314 to the first battery 312, thereby aligning the battery voltages of the first battery 312 and the second battery 314, thereby achieving battery voltage balancing between the first battery 312 and the second battery 314. Optionally, the energy of the first battery 312 may refer to the electrical energy of the first battery 312, for example, the energy of the first battery 312 may be the product of the battery capacity corresponding to the first battery 312 and the first battery voltage; the energy of the second battery 314 may refer to the electrical energy of the second battery 314, for example, the energy of the second battery 314 may be the product of the battery capacity corresponding to the second battery 314 and the second battery voltage.

[0051] When the first battery 312 and the second battery 314 are not in a voltage-balanced state, and the first battery voltage corresponding to the first battery 312 is greater than the second battery voltage corresponding to the second battery 314, the adjustment module 330 may transfer energy from the first battery 312 to the second battery 314, thereby reducing the first battery voltage corresponding to the first battery 312 and increasing the second battery voltage corresponding to the second battery 314, so that the battery voltages of the first battery 312 and the second battery 314 approach the same. When the first battery 312 and the second battery 314 are not in a voltage-balanced state, and the first battery voltage corresponding to the first battery 312 is less than the second battery voltage corresponding to the second battery 314, the adjustment module 330 may transfer energy from the second battery 314 to the first battery 312, thereby reducing the second battery voltage corresponding to the second battery 314 and increasing the first battery voltage corresponding to the first battery 312, so that the battery voltages of the first battery 312 and the second battery 314 approach the same.

[0052] The charge pump circuit 320 is used to perform a first conversion process on the first voltage input to the charge pump circuit 320 to obtain a second voltage, and output the second voltage to the adjustment module 330, so that the adjustment module 330 makes the battery voltages of the first battery 312 and the second battery 314 tend to be the same according to the second voltage; and / or, to perform a second conversion process on the third voltage output by the adjustment module 330 to obtain a fourth voltage, and output the fourth voltage to the battery module 310, so that the battery voltages of the first battery 312 and the second battery 314 tend to be the same.

[0053] The first voltage may be a voltage to be input to the adjustment module 330, and the third voltage may be a voltage output by the adjustment module 330. The charge pump circuit 320 may convert the first voltage to be input to the adjustment module 330 and / or the third voltage output by the adjustment module 330, thereby reducing the voltage difference between the input and output of the adjustment module 330.

[0054] As an embodiment, the first voltage input to the charge pump circuit 320 may be the voltage provided by the battery module 310. The charge pump circuit 320 may be connected to the positive electrode of the battery module 310. Alternatively, the negative electrode of the first battery 312 may be connected to the positive electrode of the second battery 314, and the positive electrode of the first battery 312 may be connected to the first terminal of the charge pump circuit 320. When the first battery 312 needs to transfer energy to the second battery 314, the first voltage may be the voltage corresponding to the positive electrode of the first battery 312. The first voltage may be the sum of the first battery voltage of the first battery 312 and the second battery voltage of the second battery 314.

[0055] When the first battery 312 needs to transfer energy to the second battery 314, the charge pump circuit 320 can perform a first conversion process on the first voltage provided by the battery module 310 to obtain a second voltage, and transmit the second voltage to the adjustment module 330. The adjustment module 330 can provide electrical energy to the second battery 314 based on the second voltage, achieving energy transfer between the two batteries so that the battery voltages of the two batteries tend to be the same. Furthermore, since the first voltage provided by the battery module 310 is the sum of the first battery voltage of the first battery 312 and the second battery voltage of the second battery 314, it is necessary to reduce the voltage to obtain the battery voltage required by the second battery 314. Therefore, the first conversion process may include a voltage reduction process, and the charge pump circuit 320 can reduce the voltage of the first voltage provided by the battery module 310 to obtain the second voltage. Compared with the related art, in which the first voltage is directly stepped down to the battery voltage required by the second battery 314 through an adjustment module (such as a bidirectional Buck-Boost circuit, etc.), in the embodiment of the present application, the first voltage can be first stepped down by the charge pump circuit 320 to obtain a second voltage, and then the second voltage is input to the adjustment module 330. The adjustment module 330 only needs to step down the second voltage to the battery voltage required by the second battery 314, which significantly reduces the voltage difference between the input and output of the adjustment module 330. For example, the first voltage provided by the battery module 310 is 8.5 (volts), and the battery voltage required by the second battery 314 is 4V. In the related art, the adjustment module needs to reduce the voltage from 8.5V to 4V, and the voltage difference between the input and output of the adjustment module is 4.5V. However, in the embodiment of the present application, the first voltage can be first reduced from 8.5V to 4.25V through the charge pump circuit 320, and then the second voltage of 4.25V is input into the adjustment module 330. The adjustment module 330 only needs to reduce the voltage from 4.25V to 4V, and the voltage difference between the input and output of the adjustment module 330 is 0.25V, which reduces the loss of the adjustment module 330 and improves the working efficiency of the adjustment module 330.

[0056] When the second battery 314 needs to transfer energy to the first battery 312, the second battery 314 may output a voltage to the adjustment module 330. The adjustment module 330 may generate a third voltage based on the voltage output by the second battery 314 and output the third voltage to the charge pump circuit 320. The charge pump circuit 320 may perform a second conversion process on the third voltage output by the adjustment module 330 to generate a fourth voltage, which it then provides to the first battery 312. Furthermore, because the charge pump circuit 320 is connected to the positive electrode of the first battery 312, the voltage corresponding to the positive electrode of the first battery 312 is greater than the second battery voltage of the second battery 314. In other words, the voltage corresponding to the positive electrode of the first battery 312 is greater than the voltage output by the second battery 314 to the adjustment module 330. Therefore, a voltage boost is required to increase the first battery voltage of the first battery 312. The second conversion process includes a voltage boost process. The charge pump circuit 320 may boost the third voltage output by the adjustment module 330 to generate a fourth voltage, which it then outputs to the first battery 312. Compared to the related art, in which the single-battery voltage output by the second battery 314 is directly boosted to the dual-battery voltage by the adjustment module, in the embodiment of the present application, the adjustment module 330 can perform a small voltage conversion on the voltage output by the second battery 314, and then the charge pump circuit 320 performs the voltage boosting process, which significantly reduces the voltage difference between the input and output of the adjustment module 330, reduces the loss of the adjustment module 330 and improves the working efficiency of the adjustment module 330.

[0057] In the embodiment of the present application, the battery voltages of the first battery 312 and the second battery 314 can be balanced. By connecting the adjustment module 330 to the second end of the charge pump circuit 320, the charge pump circuit 320 is used to convert the first voltage input to the adjustment module 330 and / or the third voltage output by the adjustment module 330, thereby reducing the voltage difference between the input and output of the adjustment module 330, thereby improving the operating efficiency of the adjustment module 330. In addition, since the charge pump circuit 320 is a component that is already provided in most electronic devices with multi-battery power supply systems, the embodiment of the present application can improve the operating efficiency of the adjustment module 330 by simply adjusting the connection between the adjustment module 330 and the second end of the charge pump circuit 320, eliminating the need for additional components and reducing costs.

[0058] In some embodiments, the first battery 312, the charge pump circuit 320, the adjustment module 330, and the second battery 314 form a bidirectional energy transfer path. When the battery module 310 is in a first state, the first battery 312 transfers energy to the second battery 314 through the energy transfer path. When the battery module 310 is in a second state, the second battery 314 transfers energy to the first battery 312 through the energy transfer path.

[0059] The battery module 310 being in the first state may refer to a state in which the first battery 312 needs to transfer energy to the second battery 314. In the first state, the first battery voltage of the first battery 312 is greater than the second battery voltage of the second battery 314. When the first battery voltage of the first battery 312 is greater than the second battery voltage of the second battery 314, the battery module 310 may be determined to be in the first state. Alternatively, when a first voltage difference between the first battery voltage of the first battery 312 and the second battery voltage of the second battery 314 is greater than a first threshold, the battery module 310 may be determined to be in the first state. The first voltage difference may be obtained by subtracting the second battery voltage from the first battery voltage.

[0060] The battery module 310 being in the second state may refer to a state in which the second battery 314 needs to transfer energy to the first battery 312. In the second state, the first battery voltage of the first battery 312 is less than the second battery voltage of the second battery 314. If the second battery voltage of the second battery 314 is greater than the first battery voltage of the first battery 312, the battery module 310 may be determined to be in the second state. Alternatively, if a second voltage difference between the second battery voltage of the second battery 314 and the second battery voltage of the first battery 312 is greater than a second threshold, the battery module 310 may be determined to be in the second state. The second voltage difference may be obtained by subtracting the first battery voltage from the second battery voltage. The second threshold may be the same as or different from the first threshold and may be set according to actual needs. This is not limited in the present embodiment.

[0061] When the battery module 310 is in the first state, the energy of the first battery 312 can be transferred to the second battery 314 through the charge pump circuit 320 and the adjustment module 330. When the battery module 310 is in the second state, the energy of the second battery 314 can be transferred to the first battery 312 through the adjustment module 330 and the charge pump circuit 320.

[0062] In some embodiments, the charge pump circuit 320 may be a charge pump circuit that supports bidirectional energy transmission and can switch the direction of energy transmission according to actual conditions. The charge pump circuit 320 is further configured to, when the ratio of the voltage at the first terminal of the charge pump circuit 320 to the voltage at the second terminal is greater than or equal to a target ratio, perform a first conversion process on the first voltage according to a first conversion ratio, with the energy flow of the charge pump circuit 320 being from the first terminal to the second terminal; and / or, when the ratio of the voltage at the first terminal of the charge pump circuit 320 to the voltage at the second terminal is less than the target ratio, perform a second conversion process on the third voltage output by the adjustment module 330 according to a second conversion ratio, with the energy flow of the charge pump circuit 320 being from the second terminal to the first terminal.

[0063] The first terminal of the charge pump circuit 320 is connected to the positive electrode of the battery module 310, and the voltage at the first terminal of the charge pump circuit 320 may be the voltage corresponding to the positive electrode of the battery module 310. The second terminal of the charge pump circuit 320 is connected to the adjustment module 330, and the voltage at the second terminal of the charge pump circuit 320 may be the voltage at the input terminal / output terminal of the adjustment module 330. Optionally, when the battery module 310 is in the first state, the voltage at the second terminal of the charge pump circuit 320 may be the voltage at the input terminal of the adjustment module 330, and when the battery module 310 is in the second state, the voltage at the second terminal of the charge pump circuit 320 may be the voltage at the output terminal of the adjustment module 330.

[0064] When the ratio of the first terminal voltage to the second terminal voltage of the charge pump circuit 320 is greater than or equal to the target ratio, it means that the voltage of the positive electrode of the battery module 310 is larger, that is, the first battery voltage of the first battery 312 is larger, or the first battery voltage of the first battery 312 is close to the second battery voltage of the second battery 314, then the charge pump circuit 320 can switch to the first operating mode. In this first operating mode, the energy flow of the charge pump circuit 320 is from the first end to the second end, the first end is the input end of the charge pump circuit 320, and the second end is the output end of the charge pump circuit 320. The charge pump circuit 320 can step down the first voltage provided by the battery module 310 according to the first conversion ratio, that is, step down the first terminal voltage according to the first conversion ratio to obtain the second terminal voltage (that is, the second voltage), and transmit it to the adjustment module 330.

[0065] When the ratio of the first-end voltage to the second-end voltage of the charge pump circuit 320 is less than the target ratio, it means that the second battery voltage of the second battery 314 in the battery module 310 is larger, then the charge pump circuit 320 can switch to the second operating mode. In this second operating mode, the energy flow of the charge pump circuit 320 is from the second end to the first end, the second end is the input end of the charge pump circuit 320, and the first end is the output end of the charge pump circuit 320. The charge pump circuit 320 can perform a second conversion processing on the third voltage output by the adjustment module 330 according to the second conversion ratio, that is, boost the second-end voltage according to the second conversion ratio to obtain the first-end voltage (that is, the fourth voltage), and transmit it to the battery module 310.

[0066] The first conversion ratio and the second conversion ratio can be reciprocals of each other. For example, in a dual-battery powered architecture, the first conversion ratio can be 2:1, and the second conversion ratio can be 1:2. The conversion ratio is the ratio of the input voltage to the output voltage of the charge pump circuit 320. The target ratio can be determined based on the first conversion ratio. For example, the first conversion ratio can be 2:1, and the target ratio can be 2, but this is not limited to this.

[0067] It should be noted that the charge pump circuit 320 can switch its operating mode by itself or by an external control module, which is not limited here. Optionally, the charge pump circuit 320 can also default to the first operating mode. When energy transfer between the first battery 312 and the second battery 314 is not required, the charge pump circuit 320 can also step down the first voltage provided by the battery module 310 to power the load.

[0068] The charge pump circuit 320 can determine the direction of energy flow based on the voltage relationship between the first end and the second end, thereby realizing a bidirectional working mode and flexibly switching the direction of energy transmission according to actual needs, thereby ensuring the normal use of the first battery 312 and the second battery 314, achieving battery voltage balance between the first battery 312 and the second battery 314, and ensuring the service life of the battery.

[0069] In the embodiment of the present application, the first battery 312, the charge pump circuit 320, the adjustment module 330 and the second battery 314 can form a bidirectional energy transfer path. The first battery 312 and the second battery 314 can transfer energy through the energy transfer path, thereby achieving battery voltage balancing between the first battery 312 and the second battery 314. The circuit is simple and easy to implement, and the balancing efficiency is high.

[0070] In some embodiments, the charge pump circuit 320 is further configured to step down the first voltage provided by the battery module 310 to obtain a second voltage, and provide the second voltage to the load and / or the adjustment module 330 .

[0071] When no energy transfer is required between the first battery 312 and the second battery 314, the charge pump circuit 320 can step down the first voltage provided by the battery module 310 to obtain a second voltage, and provide the second voltage to the load. The charge pump circuit 320 can step down the first voltage provided by the battery module 310 according to the voltage required by the load. Optionally, the voltage required by the load is within the voltage range of a single battery. For a dual-battery powered system architecture, the charge pump circuit 320 can be a 2:1 charge pump circuit. The charge pump circuit 320 can step down the first voltage provided by the battery module 310 according to a 2:1 conversion ratio and provide the resulting second voltage to the load.

[0072] In some embodiments, the charge pump circuit 320 is further configured to step down the first voltage provided by the first battery 312 to obtain a second voltage when the battery module 310 is in the first state.

[0073] The adjustment module 330 is configured to provide electrical energy to the second battery according to the second voltage, so as to increase the voltage of the second battery.

[0074] When the battery module 310 is in the first state, the first battery 312 needs to transfer energy to the second battery 314. The charge pump circuit 320 can then step down the first voltage provided by the first battery 312 to obtain a second voltage, and transmit the second voltage to the adjustment module 330. When the battery module 310 is in the first state, the adjustment module 330 can be configured to operate in a step-down mode, step down the second voltage, and provide electrical energy to the second battery 314 based on the stepped-down second voltage, thereby increasing the second battery voltage and bringing the first battery voltage of the first battery 312 and the second battery voltage of the second battery 314 closer to the same level.

[0075] In one embodiment, the battery capacity of the first battery 312 may be smaller than the battery capacity of the second battery 314. The charge pump circuit 320 is further configured to step down the first voltage provided by the first battery 312 to obtain a second voltage when the battery module 310 is in a charging state and a first voltage difference between the first battery voltage and the second battery voltage is greater than a first threshold.

[0076] The battery module 310 is in a charging state, which may refer to a state in which the battery module 310 is being charged using a charging signal input from an external device (such as an adapter, charger, or power bank). When the battery module 310 is in a charging state, the first battery voltage of the first battery 312 increases more rapidly because the battery capacity of the first battery 312 is smaller than the battery capacity of the second battery 314. Therefore, the battery voltages of the first battery 312 and the second battery 314 need to be balanced to avoid a situation in which the first battery 312 is fully charged but the second battery 314 is not fully charged.

[0077] When the battery module 310 is in a charging state, if the first voltage difference between the first battery voltage and the second battery voltage exceeds a first threshold, energy from the first battery 312 needs to be transferred to the second battery 314, causing the first battery voltage to decrease and the second battery voltage to increase, thereby balancing the first and second battery voltages. The first voltage provided by the first battery 312 is reduced to a second voltage after being stepped down by the charge pump circuit 320. The adjustment module 330 can operate in step-down mode, stepping down the second voltage and providing the stepped-down second voltage to the second battery 314, thereby increasing the second battery voltage.

[0078] In some embodiments, as shown in FIG4A , the adjustment module 330 may include a first switch Q1, a second switch Q2, and an inductor L1. Furthermore, the adjustment module 330 may also include a capacitor C1, which can be used to stabilize the voltage output by the adjustment module 330, making the output voltage smoother. The first switch Q1 and the second switch Q2 are connected in series, and the first switch Q1 can be connected to the charge pump circuit 320. The inductor L1 is connected to the midpoint between the first and second switches Q1 and Q2, and to the midpoint between the first and second batteries BAT1 and BAT2. When charging the first and second batteries BAT1 and BAT2, the first battery voltage of the first battery BAT1 increases faster because the battery capacity of the first battery BAT1 is smaller than that of the second battery BAT2. When the first battery voltage is greater than the second battery voltage, and the first voltage difference between the first and second battery voltages is greater than a first threshold, energy from the first battery BAT1 can be transferred to the second battery BAT2. For example, if the first battery voltage is 4V and the second battery voltage is 3V, the first voltage provided by the first battery BAT1 (i.e., voltage VBAT12 = 4V + 3V = 7V) is reduced by a 2:1 step-down process by the CP circuit 320 to a second voltage (i.e., voltage Vsy1 = VBAT12 / 2 = 3.5V). The adjustment module 330 operates in buck mode, with the first switch Q1 and the second switch Q2 in the buck switching state. The adjustment module 330 steps down the second voltage and outputs it to the second battery BAT2, thereby increasing the second battery voltage VBAT2. After a period of time, the second battery voltage VBAT2 can be increased to 3.5V, while the first battery voltage can be reduced to 3.5V, achieving voltage equilibrium between the two. As shown in path 410 in Figure 4A, energy from the first battery BAT1 can be transferred to the second battery BAT2 through the CP circuit 320 and the adjustment module 330.

[0079] Furthermore, when the adjustment module 330 operates in buck mode, the first switch Q1 and the second switch Q2 can switch between an on state and an off state. When the first switch Q1 is on and the second switch Q2 is off, the inductor L1 is charged, storing energy. When the first switch Q1 is off and the second switch Q2 is on, the inductor L1 is discharged, providing energy to the second battery BAT2. The first switch Q1 is the main conductor. The closer the input voltage (i.e., voltage Vsy1) of the adjustment module 330 and the output voltage (i.e., voltage VBAT2) are, the greater the duty cycle of the first switch Q1 (equal to the ratio of the input voltage to the output voltage of the adjustment module 330), thereby reducing the losses of the first switch Q1 and improving its operating efficiency. The duty cycle of the first switch Q1 refers to the ratio of the on-time of the first switch Q1 to its cycle time (equal to the sum of the on-time and the off-time). In the embodiment of the present application, the first voltage (voltage VBAT12) provided by the first battery BAT1 is first subjected to a 2:1 step-down process by the CP circuit 320, thereby reducing the input voltage of the adjustment module 330 (i.e., voltage Vsy1), thereby increasing the duty cycle of the first switch Q1 and improving the operating efficiency of the adjustment module 330.

[0080] In the embodiment of the present application, charging balance of the first battery 312 and the second battery 314 can be achieved, which can avoid the situation where the battery module 310 is not fully charged, and can avoid the situation where the battery module 310 cannot be used normally due to the battery module 310 not meeting the requirements, thereby ensuring the normal use of the first battery 312 and the second battery 314 and ensuring the service life of the battery.

[0081] In some embodiments, the adjustment module 330 is further configured to obtain a third voltage based on the voltage output by the second battery 314 when the battery module 310 is in the second state, and output the third voltage to the charge pump circuit 320 .

[0082] The charge pump circuit 320 is further configured to boost the third voltage output by the adjustment module 330 to obtain a fourth voltage, and output the fourth voltage to the first battery 312 to increase the voltage of the first battery.

[0083] When the battery module 310 is in the second state, the second battery 314 needs to transfer energy to the first battery 312. The adjustment module 330 can be used to operate in a boost mode, boosting the voltage output by the second battery 314 to obtain a third voltage, and transmit the third voltage to the charge pump circuit 320. When the battery module 310 is in the second state, the charge pump circuit 320 can boost the third voltage output by the adjustment module 330 to obtain a fourth voltage, and provide electrical energy to the first battery 312 based on the fourth voltage to increase the first battery voltage, so that the first battery voltage of the first battery 312 and the second battery voltage of the second battery 314 are close to each other.

[0084] In one embodiment, the battery capacity of the first battery 312 may be smaller than the battery capacity of the second battery 314. The charge pump circuit 320 is further configured to boost the third voltage output by the adjustment module 330 to obtain a fourth voltage when the battery module 310 is in a discharging state and a second voltage difference between the second battery voltage and the first battery voltage is greater than a second threshold.

[0085] The battery module 310 is in a discharging state, which refers to a state in which the battery module 310 is supplying power to a load. When the battery module 310 is in a discharging state, the first battery voltage of the first battery 312 drops rapidly because the battery capacity of the first battery 312 is smaller than the battery capacity of the second battery 314. Therefore, the battery voltages of the first battery 312 and the second battery 314 need to be balanced to avoid a situation in which the first battery 312 is completely discharged while the second battery 314 still has some charge.

[0086] When the battery module 310 is in a discharging state, if the second voltage difference between the second battery voltage and the first battery voltage is greater than a second threshold, energy from the second battery 314 needs to be transferred to the first battery 312, causing the second battery voltage to drop and the first battery voltage to rise, thereby balancing the first and second battery voltages. The voltage output by the second battery 314 (i.e., the second battery voltage) is boosted by the adjustment module 330 to obtain a third voltage. The third voltage is then transmitted to the charge pump circuit 320, which, after further boosting by the charge pump circuit, obtains a fourth voltage. The fourth voltage is then provided to the first battery 312, thereby increasing the first battery voltage.

[0087] In some embodiments, as shown in FIG4B , during discharge of the first and second batteries BAT1 and BAT2, the first battery voltage of the first battery BAT1 decreases faster because the battery capacity of the first battery BAT1 is smaller than that of the second battery BAT2. When the second battery voltage is greater than the first battery voltage and a second voltage difference between the first and second battery voltages is greater than a second threshold, energy from the second battery BAT2 can be transferred to the first battery BAT1. The adjustment module 330 operates in boost mode, with the first and second switches Q1 and Q2 in the Boost switching state. The adjustment module 330 boosts the output voltage of the second battery (i.e., voltage VBAT2) to generate a third voltage (i.e., voltage Vsy1), which is then transmitted to the CP circuit 320. After a 1:2 boost process by the CP circuit, the voltage is converted to a fourth voltage (i.e., voltage VBAT12). After a period of time, the second battery voltage VBAT2 decreases while the first battery voltage increases, maintaining the first battery voltage greater than or equal to the second battery voltage, achieving voltage equilibrium between the two. As shown in a path 420 in FIG. 4B , the energy of the second battery BAT2 may be transferred to the first battery BAT1 through the adjustment module 330 and the CP circuit 320 .

[0088] Furthermore, when the adjustment module 330 operates in boost mode, the first switch Q1 and the second switch Q2 can switch between an on state and an off state. When the second switch Q2 is on, the first switch Q1 is off, and the inductor L1 is charged, storing energy. When the second switch Q2 is off and the first switch Q1 is on, the inductor L1 is discharged, providing energy to the first battery BAT1. The second switch Q2 is the main controller. The closer the input voltage (i.e., voltage VBAT2) of the adjustment module 330 is to the output voltage (i.e., voltage Vsy1), the smaller the duty cycle of the second switch Q2 (the ratio of the difference between the input voltage and output voltage of the adjustment module 330 to the output voltage), the greater the duty cycle of the first switch Q1, and the higher the operating efficiency. The duty cycle of the second switch Q2 refers to the ratio of the on-time of the second switch Q2 to the cycle time (equal to the sum of the on-time and off-time). In the embodiment of the present application, the output voltage of the adjustment module 330 (i.e., voltage Vsy1) undergoes a 1:2 boost process by the CP circuit 320, thereby reducing the difference between the output voltage of the adjustment module 330 (i.e., voltage Vsy1) and the input voltage (i.e., voltage VBAT2), reducing the duty cycle of the second switch Q2, increasing the duty cycle of the first switch Q1, and improving the working efficiency of the adjustment module 330.

[0089] In some embodiments, the adjustment module 330 can be connected to the power supply output terminal. When the battery module 310 is in a discharging state, the second battery 314 transmits a voltage to the adjustment module 330. The adjustment module 330 performs a voltage boosting process on the voltage output by the second battery 314. After obtaining a third voltage, the load can also be supplied with power according to the third voltage. When the first battery voltage of the first battery 312 is low, the electric energy output by the power supply output terminal to the load can mainly come from the third voltage output by the adjustment module 330. When the first battery voltage of the first battery 312 is high, the electric energy output by the power supply output terminal to the load can come from the voltage provided by the first battery 312 and the second battery 314, and the load is supplied with power after being stepped down by the charge pump circuit 320. The charge pump circuit 320 can act as an impedance regulator, thereby maintaining a balance between the two ways of outputting energy to the load.

[0090] For example, as shown in path 430 of FIG4C , the voltage output by the second battery BAT2 can be boosted by the adjustment module 330 and then supplied to the load, thereby further ensuring battery voltage balance between the first battery BAT1 and the second battery BAT2 .

[0091] In the embodiment of the present application, discharge balance between the first battery 312 and the second battery 314 can be achieved, which can avoid the situation where the battery module 310 cannot be fully discharged, and ensure the normal use of the first battery 312 and the second battery 314.

[0092] In some embodiments, when the first battery 312 and the second battery 314 are in a voltage-balanced state, the adjustment module 330 may be in an inoperative state. Optionally, the inoperative state of the adjustment module 330 may be a state in which both the first switch Q1 and the second switch Q2 in the adjustment module 330 are disconnected, thereby reducing energy loss and improving the battery life of the battery module 310.

[0093] In some embodiments, when the first battery 312 and the second battery 314 are in a voltage-balanced state, the adjustment module 330 may operate in a pass-through mode. In the pass-through mode, the first switch Q1 remains on and the second switch Q2 remains off.

[0094] The voltage balance state refers to a state in which the battery voltages of the first battery 312 and the second battery 314 are balanced. In the voltage balance state, the first battery voltage of the first battery 312 and the second battery voltage of the second battery 314 are equal or very close (for example, a first voltage difference between the first battery voltage and the second battery voltage is less than a first threshold, or a second voltage difference between the second battery voltage and the first battery voltage is less than a second threshold, etc.). The first battery 312 and the second battery 314 can achieve automatic charging and discharging balance, that is, the battery voltages of the first battery 312 and the second battery 314 are automatically brought close to the same level during charging and discharging.

[0095] As shown in FIG5 , in one embodiment, the power supply circuit 300 may further include a charging interface 340, which may be connected to the second end of the charge pump circuit 320 and to the adjustment module 330. The charging interface 340 may be used to connect to a power supply device, which may include but is not limited to a USB (Universal Serial Bus) interface, a wireless charging interface, etc. The power supply device may include but is not limited to an adapter, a mobile power supply, etc.

[0096] The charging interface 340 , the charge pump circuit 320 , the first battery 312 , and the second battery 314 may form a first charging path, while the charging interface 340 , the adjustment module 330 , and the second battery 314 may form a second charging path.

[0097] The charging interface 340 is configured to receive an input charging signal and charge the battery module 310 through the first charging path and / or the second charging path according to the charging signal.

[0098] The charging interface 340 charges the first battery 312 and the second battery 314 through a first charging path. The charge pump circuit 320 can boost the charging voltage provided by the charging interface and transmit the boosted charging voltage to the first battery 312 and the second battery 314 to charge the first battery 312 and the second battery 314. Optionally, the charge pump circuit 320 can boost the charging voltage provided by the charging interface at a conversion ratio of 1:2, thereby improving charging efficiency and meeting the charging requirements of the first battery 312 and the second battery 314. For example, as shown in path 610 in FIG. 6A , the charging voltage output by the charging interface 340 undergoes a 1:2 boost conversion by the CP circuit 320 before charging the first battery BAT1 and the second battery BAT2.

[0099] The charging interface 340 charges the second battery 314 through a second charging path. As shown in FIG6A , when the adjustment module 330 operates in pass-through mode, the charging interface 340, the first switch Q1, the inductor L1, and the second battery 314 form a second charging path, as shown by path 620. The charging interface 340 can directly charge the second battery 314 through the first switch Q1 and the inductor L1. The impedance of the second charging path is lower than that of the first charging path. During charging, if the first battery voltage of the first battery BAT1 is higher, more energy provided by the charging interface 340 flows through the second charging path with lower impedance, charging the second battery BAT2. If the second battery voltage of the second battery BAT2 is higher, more energy provided by the charging interface 340 flows through the CP circuit 320 to the first battery BAT1 and the second battery BAT2, charging the first battery BAT1 and the second battery BAT2, thereby achieving automatic balancing between the first battery BAT1 and the second battery BAT2.

[0100] In some embodiments, the power supply circuit 300 can correspond to a first charging mode and a second charging mode, wherein the charging speed of the first charging mode is lower than the charging speed of the second charging mode. The first charging mode can be understood as a normal charging mode, and the second charging mode can be understood as a fast charging mode. The charging interface 340 is also used to charge the battery module through the first charging path and / or the second charging path according to the received charging signal in the first charging mode.

[0101] The charging interface 340 can also be connected to the battery module 310. The charging interface 340, the first battery 312, and the second battery 314 form a third charging path. The charging interface 340, the charge pump circuit 320, the adjustment module 330, and the second battery 314 form a fourth charging path. The charging interface 340 is also used to charge the battery module 310 through the third charging path and / or the fourth charging path according to the received charging signal in the second charging mode.

[0102] The third charging path may be a direct charging channel corresponding to the second charging mode. The charging interface 340 may directly output a charging voltage to the battery module 310 to charge the first battery 312 and the second battery 314. For example, as shown by path 630 in FIG. 6B , the charging interface 340 directly charges the first battery BAT1 and the second battery BAT2.

[0103] In the second charging mode, the charging interface 340 can also charge the second battery 314 via a fourth charging path. As shown in FIG6B , when the adjustment module 330 operates in the pass-through mode, the charging interface 340, the adjustment module 330, the first switch Q1, the inductor L1, and the second battery 314 can form a fourth charging path, as shown by path 640. The charging voltage provided by the charging interface 340 is stepped down by the CP circuit 320, and then the stepped-down charging voltage is passed through the first switch Q1 and the inductor L1 to charge the second battery 314. During charging, if the first battery voltage of the first battery BAT1 is higher, more energy provided by the charging interface 340 flows to the adjustment module 330 through the CP circuit 320, and charges the second battery BAT1 through the conductive first switch Q1 and the inductor L1. If the second battery voltage of the second battery BAT2 is higher, more energy provided by the charging interface 340 flows directly to the first battery BAT1 and the second battery BAT2, charging the first battery BAT1 and the second battery BAT2, thereby achieving automatic balancing between the first battery BAT1 and the second battery BAT2.

[0104] It should be noted that in the second charging mode, if the battery module 310 is in the first state, the first voltage input to the charge pump circuit 320 may also be the charging voltage provided by the charging interface 340. The charge pump circuit 320 may step down the first voltage provided by the charging interface 340 to obtain a second voltage, and provide the second voltage to the adjustment module 330. The adjustment module 330 operates in the step-down mode and may step down the second voltage output by the charge pump circuit 320 and provide electrical energy to the second battery 314 based on the stepped-down second voltage to increase the second battery voltage.

[0105] In one embodiment, when the battery module 310 is in a discharging state, the second battery, the first battery 312, the charge pump circuit 320, and the power output terminal form a first discharge path. The second battery 314, the adjustment module 330, and the power output terminal can form a second discharge path. The battery module 310 supplies power to the load through the first discharge path and / or the second discharge path.

[0106] The battery module 310 supplies power to the load via a first discharge path. The first voltage provided by the battery module 310 is stepped down by the charge pump circuit 320, and the resulting second voltage is transmitted to the load to power the load. For example, as shown by path 710 in FIG. 7 , the voltage output by the first battery BAT1 and the second battery BAT2 (i.e., voltage VBAT12) is stepped down 2:1 by the charge pump circuit 320 before being supplied to the load.

[0107] The battery module 310 supplies power to the load via a second discharge path. As shown in Figure 7, when the adjustment module 330 operates in direct-flow mode, the second battery BAT2, inductor L1, first switch Q1, and the power supply output terminal form a second discharge path. As shown in path 720, the voltage output by the second battery BAT2 passes through the inductor L1 and first switch Q1 to directly supply power to the load. During discharge, if the first battery voltage of the first battery BAT1 is higher, the voltage provided by the first battery BAT1 and the second battery BAT2 is supplied to the load via the CP circuit 320. If the second battery voltage of the second battery BAT2 is higher, the voltage of the second battery BAT2 is supplied directly to the load via the adjustment module 330, achieving automatic balancing between the first and second batteries BAT1 and BAT2.

[0108] In the embodiment of the present application, when the battery module 310 is in a voltage-balanced state, the adjustment module 330 can operate in a pass-through mode, which can achieve automatic balancing of the first battery 312 and the second battery 314 during the charging and discharging process, further improving the working efficiency of the adjustment module 330.

[0109] In some embodiments, the power supply circuit 300 may further include a control module. The control module may be connected to the adjustment module 330 . Furthermore, the control module may be connected to the first switch Q1 and the second switch Q2 of the adjustment module 330 .

[0110] The control module is used to control the adjustment module 330 to operate in a step-down mode when the battery module 310 is in a first state, to control the adjustment module 330 to operate in a boost mode when the battery module 310 is in a second state, and to control the adjustment module 330 to operate in a pass-through mode or not operate when the battery module 310 is in a voltage-balanced state.

[0111] The control module can control the first switch Q1 and the second switch Q2 in the adjustment module 330 to operate in different modes to achieve battery voltage balancing between the first battery 312 and the second battery 314 . The control method is simple and easy to implement.

[0112] The first switch Q1 and the second switch Q2 may include but are not limited to MOS (Metal-Oxide-Semiconductor Field-Effect Transistor) switches.

[0113] It should be noted that the power supply circuit 300 provided in the above embodiments only shows a dual-battery power supply system architecture of the first battery 312 and the second battery 314. The solution provided in the embodiments of the present application can also be applied to system architectures powered by more batteries, such as 4-battery power supply, etc. The corresponding charge pump circuit and adjustment module can be added according to the actual number of batteries. The embodiments of the present application do not limit the number of batteries included in the battery module 310.

[0114] As shown in FIG8 , in one embodiment, a chip 800 is provided, which may include the power supply circuit 300 described in the above embodiments.

[0115] In one embodiment, an electronic device is provided, which may include the power supply circuit 300 described in the above embodiments, or may include the chip 800 described in the above embodiments.

[0116] As shown in FIG9 , in one embodiment, a voltage conversion method is provided, which can be applied to the above-mentioned electronic device or the above-mentioned power supply circuit. The method may include step 910 and / or step 920:

[0117] In step 910 , the charge pump circuit performs a first conversion process on the first voltage input to the charge pump circuit to obtain a second voltage, and outputs the second voltage to the adjustment module so that the adjustment module makes the battery voltages of the first battery and the second battery tend to be the same according to the second voltage.

[0118] Step 920 , performing a second conversion process on the third voltage output by the adjustment module through the charge pump circuit to obtain a fourth voltage, and outputting the fourth voltage to the battery module to make the battery voltages of the first battery and the second battery approach the same.

[0119] In one embodiment, the first battery, the charge pump circuit, the adjustment module, and the second battery form a bidirectional energy transfer path. The method further includes: when the battery module is in a first state, the first battery transfers energy to the second battery through the energy transfer path; when the battery module is in a second state, the second battery transfers energy to the first battery through the energy transfer path.

[0120] Wherein, in the first state, the first battery voltage of the first battery is greater than the second battery voltage of the second battery; in the second state, the first battery voltage of the first battery is less than the second battery voltage of the second battery.

[0121] In one embodiment, step 910 includes: stepping down a first voltage provided by the battery module by a charge pump circuit to obtain a second voltage, and providing the second voltage to a load and / or an adjustment module.

[0122] Step 920 includes: boosting the third voltage output by the adjustment module by a charge pump circuit to obtain a fourth voltage.

[0123] In one embodiment, step 910 includes: when a ratio of a voltage at a first terminal to a voltage at a second terminal of the charge pump circuit is greater than or equal to a target ratio, performing a first conversion process on the first voltage according to a first conversion ratio by the charge pump circuit, wherein energy flow of the charge pump circuit is from the first terminal to the second terminal;

[0124] Step 920 includes: when a ratio of a voltage at the first terminal to a voltage at the second terminal of the charge pump circuit is less than a target ratio, performing a second conversion process on the third voltage output by the adjustment module according to a second conversion ratio by the charge pump circuit, wherein energy flow of the charge pump circuit is from the second terminal to the first terminal. The first conversion ratio and the second conversion ratio are reciprocals of each other.

[0125] In one embodiment, the step of stepping down the first voltage provided by the battery module through a charge pump circuit to obtain a second voltage includes: when the battery module is in a first state, stepping down the first voltage provided by the battery module through a charge pump circuit to obtain a second voltage.

[0126] The step of adjusting the module so that the battery voltages of the first battery and the second battery tend to be the same according to the second voltage includes: providing electric energy to the second battery according to the second voltage by the adjusting module to increase the second battery voltage.

[0127] In one embodiment, the step of providing electrical energy to the second battery according to the second voltage through the adjustment module to increase the second battery voltage includes: when the battery module is in the first state, controlling the adjustment module to operate in a step-down mode, stepping down the second voltage through the adjustment module, and providing electrical energy to the second battery according to the second voltage after the step-down process to increase the second battery voltage.

[0128] In one embodiment, the step of stepping down the first voltage provided by the battery module through a charge pump circuit to obtain a second voltage includes: when the battery module is in a charging state and a first voltage difference between the first battery voltage and the second battery voltage is greater than a first threshold, stepping down the first voltage provided by the first battery through the charge pump circuit to obtain the second voltage.

[0129] In one embodiment, before the step of boosting the third voltage output by the adjustment module through the charge pump circuit to obtain the fourth voltage, the method further includes: when the battery module is in the second state, obtaining the third voltage according to the voltage output by the second battery through the adjustment module, and outputting the third voltage to the charge pump circuit.

[0130] The step of boosting the third voltage output by the adjustment module through a charge pump circuit to obtain a fourth voltage includes: boosting the third voltage output by the adjustment module through a charge pump circuit to obtain a fourth voltage, and outputting the fourth voltage to the first battery to increase the voltage of the first battery.

[0131] In one embodiment, the step of obtaining a third voltage based on the voltage output by the second battery through the adjustment module and outputting the third voltage to the charge pump circuit includes: controlling the adjustment module to operate in a boost mode, and boosting the voltage output by the second battery through the adjustment module to obtain the third voltage.

[0132] In one embodiment, the step of boosting the third voltage output by the adjustment module through a charge pump circuit to obtain a fourth voltage includes: when the battery module is in a discharging state and the second voltage difference between the second battery voltage and the first battery voltage is greater than a second threshold, boosting the third voltage output by the adjustment module through the charge pump circuit to obtain the fourth voltage.

[0133] In one embodiment, the adjustment module includes a first switch, a second switch, and an inductor. The method further includes: when the first battery and the second battery are in a voltage-balanced state, controlling the adjustment module to operate in a pass-through mode, wherein the first switch remains in an on state and the second switch remains in an off state.

[0134] In one embodiment, the charging interface, the charge pump circuit, the first battery, and the second battery form a first charging path; when the adjustment module operates in a pass-through mode, the charging interface, the first switch, the inductor, and the second battery form a second charging path; the method further includes: receiving an input charging signal through the charging interface, and charging the battery module through the first charging path and / or the second charging path according to the charging signal.

[0135] In one embodiment, the step of charging the battery module through the first charging path and / or the second charging path according to the charging signal includes: in a first charging mode, charging the battery module through the first charging path and / or the second charging path according to the received charging signal.

[0136] In one embodiment, the charging interface, the first battery, and the second battery form a third charging path; when the adjustment module operates in a pass-through mode, the charging interface, the charge pump circuit, the first switch, the inductor, and the second battery form a fourth charging path. The method further includes: in a second charging mode, charging the battery module via the third charging path and / or the fourth charging path based on a received charging signal. The charging speed in the first charging mode is lower than the charging speed in the second charging mode.

[0137] In one embodiment, the second battery, the first battery, the charge pump circuit, and the power supply output terminal form a first discharge path; when the adjustment module operates in a pass-through mode, the second battery, the inductor, the first switch, and the power supply output terminal form a second discharge path; the method further includes: the battery module supplies power to the load through the first discharge path and / or the second discharge path.

[0138] It should be noted that the description of the voltage conversion method provided in the embodiment of the present application can refer to the relevant description of the power supply circuit provided in the above embodiments, and will not be repeated here.

[0139] In the embodiment of the present application, battery voltage balancing of the first battery and the second battery can be achieved, and by connecting the adjustment module to the second end of the charge pump circuit, the charge pump circuit is used to transform the first voltage to be input to the adjustment module and / or the third voltage output by the adjustment module, which can reduce the voltage difference between the input and output of the adjustment module, thereby improving the working efficiency of the adjustment module.

[0140] An embodiment of the present application discloses an electronic device, including a memory and a power supply circuit. The power supply circuit includes a processor. A computer program is stored in the memory. When the computer program is executed by the processor, the processor implements the method described in the above embodiments.

[0141] An embodiment of the present application discloses a computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the methods described in the above embodiments.

[0142] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing related hardware through a computer program. The program can be stored in a non-volatile computer-readable storage medium. When executed, the program can include the processes in the above-described method embodiments. The storage medium can be a magnetic disk, an optical disk, a ROM, or the like.

[0143] As used herein, any reference to memory, storage, database, or other medium may include nonvolatile and / or volatile memory. Suitable nonvolatile memory may include ROM, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM), which serves as external cache memory. By way of illustration and not limitation, RAM may be in various forms, such as static RAM (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced synchronous DRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus DRAM (RDRAM), and direct RAMbus dynamic RAM (DRDRAM).

[0144] It should be understood that the references to "one embodiment" or "an embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present application. Therefore, the references to "in one embodiment" or "in an embodiment" throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required for the present application.

[0145] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the above-mentioned processes does not necessarily mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0146] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one place or distributed across multiple network units. Some or all of these units may be selected based on actual needs to achieve the objectives of this embodiment.

[0147] In addition, the functional units in the embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0148] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0149] The above is a detailed introduction to a power supply circuit, chip, electronic device, and voltage conversion method disclosed in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core ideas of the present application. At the same time, for those skilled in the art, according to the ideas of the present application, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present application.

Claims

1. A power supply circuit, characterized in that: include: A battery module comprising a first battery and a second battery connected in series; a charge pump circuit, wherein a first end of the charge pump circuit is connected to the battery module; an adjustment module, connected to the first battery, the second battery, and the second end of the charge pump circuit respectively; The charge pump circuit is used to perform a first conversion process on a first voltage input to the charge pump circuit to obtain a second voltage, and output the second voltage to the adjustment module, so that the adjustment module makes the battery voltages of the first battery and the second battery tend to be the same according to the second voltage; and / or, to perform a second conversion process on a third voltage output by the adjustment module to obtain a fourth voltage, and output the fourth voltage to the battery module, so that the battery voltages of the first battery and the second battery tend to be the same.

2. The power supply circuit according to claim 1, wherein: The first battery, the charge pump circuit, the adjustment module and the second battery form a bidirectional energy transfer path; When the battery module is in the first state, the first battery transfers energy to the second battery through the energy transfer path; When the battery module is in the second state, the second battery transfers energy to the first battery through the energy transfer path; Wherein, in the first state, a first battery voltage of the first battery is greater than a second battery voltage of the second battery; In the second state, a first battery voltage of the first battery is lower than a second battery voltage of the second battery.

3. The power supply circuit according to claim 1, wherein: The charge pump circuit is used to reduce the voltage difference between the input voltage and the output voltage of the adjustment module.

4. The power supply circuit according to claim 1, wherein: The charge pump circuit is further configured to step down the first voltage provided by the battery module to obtain a second voltage, and provide the second voltage to the load and / or the adjustment module; and / or, The charge pump circuit is further configured to boost the third voltage output by the adjustment module to obtain a fourth voltage.

5. The power supply circuit according to claim 4, characterized in that: The negative electrode of the first battery is connected to the positive electrode of the second battery, and the positive electrode of the first battery is connected to the first end of the charge pump circuit; The charge pump circuit is further configured to, when the battery module is in a first state, step down a first voltage provided by the first battery to obtain a second voltage; in the first state, the first battery voltage of the first battery is greater than the second battery voltage of the second battery; The adjustment module is configured to provide electrical energy to the second battery according to the second voltage, so as to increase the voltage of the second battery.

6. The power supply circuit according to claim 5, characterized in that: When the battery module is in the first state, the adjustment module is configured to operate in a step-down mode, step down the second voltage, and provide electrical energy to the second battery according to the stepped-down second voltage to increase the second battery voltage.

7. The power supply circuit according to claim 4, characterized in that: The negative electrode of the first battery is connected to the positive electrode of the second battery, and the positive electrode of the first battery is connected to the first end of the charge pump circuit; the adjustment module is configured to obtain the third voltage based on the voltage output by the second battery and output the third voltage to the charge pump circuit when the battery module is in the second state; in the second state, the first battery voltage of the first battery is less than the second battery voltage of the second battery; The charge pump circuit is further configured to boost the third voltage output by the adjustment module to obtain a fourth voltage, and output the fourth voltage to the first battery to increase the voltage of the first battery.

8. The power supply circuit according to claim 7, characterized in that: When the battery module is in the second state, the adjustment module is configured to operate in a boost mode to boost the voltage output by the second battery to obtain the third voltage.

9. The power supply circuit according to claim 5 or 6, characterized in that: The battery capacity of the first battery is smaller than the battery capacity of the second battery; The charge pump circuit is further configured to step down the first voltage provided by the first battery to obtain a second voltage when the battery module is in a charging state and a first voltage difference between the first battery voltage and the second battery voltage is greater than a first threshold.

10. The power supply circuit according to claim 7 or 8, characterized in that: The battery capacity of the first battery is smaller than the battery capacity of the second battery; The charge pump circuit is further configured to boost the third voltage output by the adjustment module to obtain a fourth voltage when the battery module is in a discharging state and a second voltage difference between the second battery voltage and the first battery voltage is greater than a second threshold.

11. The power supply circuit according to claim 1, wherein: When the first battery and the second battery are in a voltage balance state, the adjustment module is in an inoperative state.

12. The power supply circuit according to claim 1, wherein: The adjustment module includes a first switch, a second switch, and an inductor, wherein the first switch and the second switch are connected in series, and the first switch is connected to the second end of the charge pump circuit; the inductor is connected to a midpoint between the first switch and the second switch, and the inductor is connected to a midpoint between the first battery and the second battery; When the first battery and the second battery are in a voltage-balanced state, the adjustment module operates in a pass-through mode. In the pass-through mode, the first switch remains in an on state, and the second switch remains in an off state.

13. The power supply circuit according to claim 12, wherein: The negative electrode of the first battery is connected to the positive electrode of the second battery, and the positive electrode of the first battery is connected to the first end of the charge pump circuit. The power supply circuit also includes a charging interface. The charging interface, the charge pump circuit, the first battery, and the second battery form a first charging path. When the adjustment module operates in a pass-through mode, the charging interface, the first switch, the inductor, and the second battery form a second charging path. The charging interface is used to receive an input charging signal and charge the battery module through the first charging path and / or the second charging path according to the charging signal.

14. The power supply circuit according to claim 13, wherein: The impedance of the second charging path is smaller than the impedance of the first charging path.

15. The power supply circuit according to claim 13, characterized in that: The charging interface, the first battery, and the second battery form a third charging path; when the adjustment module operates in the pass-through mode, the charging interface, the charge pump circuit, the first switch, the inductor, and the second battery form a fourth charging path; The charging interface is further configured to charge the battery module through the first charging path and / or the second charging path according to the received charging signal in a first charging mode; and to charge the battery module through the third charging path and / or the fourth charging path according to the received charging signal in a second charging mode; The charging speed of the first charging mode is lower than the charging speed of the second charging mode.

16. The power supply circuit according to claim 12, wherein: The negative electrode of the first battery is connected to the positive electrode of the second battery, and the positive electrode of the first battery is connected to the first end of the charge pump circuit; the power supply circuit also includes a power supply output end connected to a load; the second battery, the first battery, the charge pump circuit and the power supply output end form a first discharge path; When the adjustment module operates in the direct-flow mode, the second battery, the inductor, the first switch and the power supply output terminal form a second discharge path; The battery module supplies power to the load through the first discharge path and / or the second discharge path.

17. The power supply circuit according to any one of claims 1 to 8 and 11 to 16, characterized in that: The charge pump circuit is further configured to, when a ratio of a voltage at a first terminal to a voltage at a second terminal of the charge pump circuit is greater than or equal to a target ratio, perform a first conversion process on the first voltage according to a first conversion ratio, and energy flow of the charge pump circuit is from the first terminal to the second terminal; and / or The charge pump circuit is further configured to perform a second conversion process on the third voltage output by the adjustment module according to a second conversion ratio when a ratio of a voltage at the first terminal to a voltage at the second terminal of the charge pump circuit is less than a target ratio, wherein the energy flow of the charge pump circuit is from the second terminal to the first terminal; The first transformation ratio and the second transformation ratio are reciprocals of each other.

18. A chip, characterized in that: The invention comprises the power supply circuit according to any one of claims 1 to 17.

19. An electronic device, characterized in that: The power supply circuit comprises the power supply circuit according to any one of claims 1 to 17, or the chip according to claim 18.

20. A voltage conversion method, characterized in that: The method comprises: performing a first conversion process on a first voltage input to the charge pump circuit by the charge pump circuit to obtain a second voltage, and outputting the second voltage to the adjustment module, so that the adjustment module makes the battery voltages of the first battery and the second battery of the battery module tend to be the same according to the second voltage; and / or, The third voltage output by the adjustment module is subjected to a second conversion process by a charge pump circuit to obtain a fourth voltage, and the fourth voltage is output to the battery module, so that the battery voltages of the first battery and the second battery tend to be the same.

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