Voltage regulation circuit, circuit control method, chip, and electronic device

Abstract

Disclosed are a voltage regulation circuit, a circuit control method, a chip, and an electronic device, relating to the technical field of electronic circuits. The voltage regulation circuit comprises: a battery module (301); 401), comprising at least two batteries connected in series; a power supply end (302; 402), configured to receive a power supply voltage inputted by a power supply apparatus; and a voltage conversion module (303; 404) connected to the power supply end (302; 402) and the battery module (301; 401), and configured to perform first conversion processing on a first voltage outputted by the battery module (301; 401) to obtain a second voltage, and output the second voltage to a load; or perform second conversion processing on the power supply voltage to obtain a third voltage, and output the third voltage to the battery module (301; 401). The voltage conversion module (303; 404) can operate not only in a fixed conversion ratio mode, but also in an adjustable conversion ratio mode. The adjustable conversion ratio mode allows the battery module (301; 401) to reach a lower discharge voltage, enabling the battery module (301; 401) to discharge more persistently and extending the capability of the battery module (301; 401) to support discharging at lower voltages.

Description

Voltage regulation circuits, circuit control methods, chips and electronic devices

[0001] This application claims priority to Chinese Patent Application No. CN 202411604528.X, filed on November 11, 2024, entitled "Voltage Regulation Circuit, Circuit Control Method, Chip and Electronic Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of electronic circuit technology, and in particular to a voltage regulation circuit, circuit control method, chip, and electronic device. Background Technology

[0003] With the development of science and technology, all kinds of electronic devices have appeared in people's daily lives. These electronic devices are usually powered by batteries.

[0004] Currently, to achieve the conversion between battery voltage and the supply voltage for powering the load of electronic devices, a charge pump (CP) is typically used. Under normal circumstances, a typical CP operates at a traditional 2:1 ratio, maintaining a fixed 2:1 ratio between the battery voltage and the supply voltage for powering the load of the electronic device. However, because the battery in an electronic device is limited by downstream components when supplying power to the load, it needs to ensure that the voltage Vsys supplied to the load remains within the required range. If the CP can only operate at the traditional 2:1 ratio, the battery voltage needs to be maintained at least twice the lower limit of the required voltage range for Vsys. If it is lower than twice the lower limit of the required voltage range for Vsys, the requirements of Vsys cannot be met, necessitating pre-charging of the electronic device's battery to prevent it from reaching a lower discharge voltage, resulting in wasted power. Summary of the Invention

[0005] This application provides a voltage regulation circuit, a circuit control method, a chip, and an electronic device. The technical solution is as follows:

[0006] In one aspect, this application provides a voltage regulation circuit, comprising:

[0007] A battery module, comprising at least two batteries connected in series;

[0008] The power supply terminal is used to receive the power supply voltage input from the power supply device.

[0009] A voltage conversion module is connected to the power supply terminal and the battery module. It performs a first conversion process on the first voltage output by the battery module to obtain a second voltage and outputs the second voltage to the load; or, it performs a second conversion process on the power supply voltage to obtain a third voltage and outputs the third voltage to the battery module.

[0010] The voltage conversion module supports two operating modes: a first operating mode and a second operating mode. The first operating mode is a mode in which the conversion ratio of the voltage conversion module remains unchanged, and the second operating mode is a mode in which the conversion ratio of the voltage conversion module is adjustable. The conversion ratio is the ratio between the input voltage and the output voltage of the voltage conversion module.

[0011] In one aspect, this application provides a circuit control method applied to a controller of a voltage regulation circuit. The voltage regulation circuit includes a controller, a battery module, a power supply terminal, and a voltage conversion module. The battery module includes at least two batteries connected in series. The power supply terminal is used to receive a power supply voltage input from a power supply device. The voltage conversion module is connected to the power supply terminal and the battery module, performing a first transformation process on the first voltage output by the battery module to obtain a second voltage, and outputting the second voltage to a load; or performing a second transformation process on the power supply voltage to obtain a third voltage, and outputting the third voltage to the battery module. The method includes:

[0012] Obtain the total battery voltage of the battery module;

[0013] Based on the total battery voltage of the battery module, control the voltage conversion module to operate in the target operating mode among the supported operating modes;

[0014] The voltage conversion module supports two operating modes: a first operating mode and a second operating mode. The first operating mode is a mode in which the conversion ratio of the voltage conversion module remains unchanged, and the second operating mode is a mode in which the conversion ratio of the voltage conversion module is adjustable. The conversion ratio is the ratio between the input voltage and the output voltage of the voltage conversion module.

[0015] In another aspect, this application provides a chip comprising a processor and a memory, the memory storing a computer program executed by the processor to implement the circuit control method as described in one aspect above.

[0016] In another aspect, this application provides an electronic device that includes at least one voltage regulation circuit as described in one of the preceding aspects, or includes a chip as described in one of the preceding aspects.

[0017] In another aspect, this application provides a computer-readable storage medium storing a computer program that is executed by a processor to implement the circuit control method as described in one aspect.

[0018] On the other hand, embodiments of this application provide a computer program product that, when run on a computer, causes the computer to execute the circuit control method as described in one aspect above.

[0019] On the other hand, embodiments of this application provide an application publishing platform for publishing computer program products, wherein when the computer program product is run on a computer, the computer executes the circuit control method as described in one aspect above.

[0020] Details of one or more embodiments of this application are set forth in the following drawings and description. Other features and advantages of this application will be apparent from the specification, drawings, and claims. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 is a schematic diagram of the structure of an electronic device provided in an exemplary embodiment of this application;

[0023] Figure 2 is a schematic diagram of the internal circuitry of a foldable terminal according to an exemplary embodiment of this application;

[0024] Figure 3 is a schematic diagram of a voltage regulation circuit provided in an exemplary embodiment of this application;

[0025] Figure 4 is a schematic diagram of a voltage regulation circuit provided in an exemplary embodiment of this application;

[0026] Figure 5 is a schematic diagram of the switching of the working mode of the voltage conversion module under different total battery voltages of different battery modules according to an exemplary embodiment of this application;

[0027] Figure 6 is a schematic diagram of the working mode switching of a voltage conversion module under different total battery voltages of different battery modules according to an exemplary embodiment of this application;

[0028] Figure 7 is a schematic diagram of the circuit structure of a voltage conversion module according to an exemplary embodiment of this application;

[0029] Figure 8 is a schematic diagram of the circuit structure of another voltage conversion module of Figure 7 according to an exemplary embodiment of this application;

[0030] Figure 9 is a schematic diagram of the circuit structure of a voltage regulation circuit according to an exemplary embodiment of this application;

[0031] Figure 10 is a flowchart of a circuit control method provided in an exemplary embodiment of this application;

[0032] Figure 11 is a schematic diagram of a voltage regulation circuit in a mobile phone controlling the switching of the operating mode of the CP during charging, according to an exemplary embodiment of this application. Detailed Implementation

[0033] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0034] In this article, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0035] The solution provided in this application can be used in real-world scenarios where people use electronic devices to charge and discharge in their daily lives. To facilitate understanding, the application scenarios involved in the embodiments of this application will be briefly introduced below.

[0036] With the development of science and technology, various electronic devices have appeared in people's daily lives. People can use electronic devices for work, entertainment, and study. When the battery of an electronic device is low, it needs to be charged. Currently, in the charging or discharging process of electronic devices, a charge pump is used to achieve voltage conversion in order to realize the voltage boosting or bucking function. For example, typically, an CP (charge pump) is set between the battery and the charging / discharging circuit in an electronic device. During the charging and discharging process of the electronic device, the CP works to provide power to the load of the terminal device or charge the battery.

[0037] Please refer to Figure 1, which shows a schematic diagram of the structure of an electronic device provided by an exemplary embodiment of this application. As shown in Figure 1, the electronic device may include a processor 110, an internal memory 121, a charging management module 140, a power management module 141, and an energy storage module 142.

[0038] It is understood that the structures illustrated in the embodiments of this application do not constitute a specific limitation on the electronic device 100. In other embodiments of this application, the electronic device 100 may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0039] Processor 110 may include one or more processing units, such as an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural network processing unit (NPU). These different processing units may be independent devices or integrated into one or more processors. For example, processor 110 may be a smart terminal CPU, such as a Snapdragon series processor. In some embodiments, processor 110 may include one or more interfaces. Interfaces may include inter-integrated circuit (I2C) interfaces, inter-integrated circuit sound (I2S) interfaces, pulse code modulation (PCM) interfaces, universal asynchronous receiver / transmitter (UART) interfaces, mobile industry processor interfaces (MIPI), general-purpose input / output (GPIO) interfaces, subscriber identity module (SIM) interfaces, and / or universal serial bus (USB) interfaces, etc.

[0040] It is understood that the interface connection relationships between the modules illustrated in the embodiments of this application are merely illustrative and do not constitute a structural limitation on the electronic device 100. In other embodiments of this application, the electronic device 100 may also employ different interface connection methods or combinations of multiple interface connection methods as described in the above embodiments.

[0041] The charging management module 140 receives charging input from the charger. The charger can be a wireless charger or a wired charger. The power management module 141 is connected to the energy storage module 142, and the charging management module 140 is connected to the processor 110. The power management module 141 receives input from the energy storage module 142 and / or the charging management module 140, and supplies power to the processor 110, internal memory 121, etc. The energy storage module 142 is essentially a battery module, including batteries, battery cells, etc. The power management module 141 includes the buck-boost converter circuit provided later in this application.

[0042] Although not shown, the electronic device may also include a camera. Optionally, the camera may be positioned in the front or rear of the electronic device, and this application embodiment does not limit this.

[0043] It is understood that the structures illustrated in the embodiments of this application do not constitute a specific limitation on the electronic device. In other embodiments of this application, the electronic device may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0044] Optionally, the aforementioned electronic devices may include, but are not limited to, wearable devices (such as wristbands, smartwatches, smart glasses, etc.), mobile phones, tablets, laptops, MP3 players (Moving Picture Experts Group Audio Layer III), MP4 players (Moving Picture Experts Group Audio Layer IV), desktop computers, and laptop computers. The battery modules of these electronic devices may support wired or wireless charging.

[0045] Typically, the electronic devices shown in Figure 1 above need to be equipped with a corresponding operating system and run on that operating system. For example, the operating system of an electronic device can be Android, iOS, Linux, etc.

[0046] Typically, one battery is sufficient for electronic devices. However, with the changing form factors of electronic devices, many manufacturers find that using multiple batteries is more cost-effective, and the use of multiple batteries for power is becoming increasingly common in electronic devices. For example, in foldable devices, when folded, the electronic device can display everyday information such as the time on a small screen, while when unfolded, it can display corresponding interface content on a larger screen.

[0047] In such electronic devices, the two parts of a foldable terminal are typically divided into a main board and a sub-board. The manufacturer places one battery on the main board and another on the sub-board, using different batteries for power supply in different usage scenarios. Taking a foldable terminal as an example, please refer to Figure 2, which shows a schematic diagram of the internal circuitry of a foldable terminal according to an exemplary embodiment of this application. As shown in Figure 2, it includes a first battery 201, a second battery 202, a charge pump 203, a system power supply circuit 204, a charging circuit 205, and a USB interface 206.

[0048] In Figure 2, the first battery 201 and the second battery 202 are connected in series. Typically, the two batteries can have the same or different capacities. When the foldable terminal needs to use the power from the first battery 201 and the second battery 202 to power the system, the operating mode of the charge pump 203 is controlled, thereby providing the load output voltage Vsys to the terminal device through the system power supply circuit 204.

[0049] In addition, the use of the Universal Serial Bus (USB) interface 206 and the charging circuit 205 allows the foldable terminal to be connected to an external power source via a charger. Power is supplied by the external power source, and electrical energy is transferred through the charging circuit 205 to charge the first battery 201 and the second battery 202.

[0050] Optionally, in the circuit shown in Figure 2 above, since the voltage Vsys of the foldable terminal using the battery to power the system is limited by the downstream devices, the currently available Vsys voltage needs to be maintained in the range of 3.2V to 4.6V. Since the current bidirectional CP usually operates in a fixed 2:1 ratio mode, the sum of the two battery voltages needs to be maintained in the range of 6.4V to 9.2V, which is not a problem in the current graphite battery power supply system (the current graphite battery discharge voltage range is 3.4V to 4.5V).

[0051] With advancements in battery technology, silicon anode batteries have become widely used in most electronic devices. Current silicon anode batteries incorporate silicon into the anode material of graphite batteries, significantly increasing energy density. However, practical results show that the discharge voltage range of silicon anode batteries will further decrease to 2.5V or even lower. Therefore, the fixed 2:1 ratio scheme mentioned above is no longer sufficient to meet the future discharge voltage range requirements of silicon anode batteries. In electronic devices using two silicon anode batteries of unequal capacity, a key challenge is how to achieve balanced charge and discharge between these two batteries using a charge pump with adjustable output voltage.

[0052] To expand battery support for lower voltage discharge and improve the energy utilization of batteries in electronic devices, this application provides a circuit control method that allows the charge pump to operate in a fixed mode with an unchanged conversion ratio, or in a mode with an adjustable conversion ratio. This makes the adjustment of the battery module more flexible and supports lower voltage discharge.

[0053] Please refer to Figure 3, which shows a schematic diagram of a voltage regulation circuit provided in an exemplary embodiment of this application. As shown in Figure 3, the voltage regulation circuit includes: a battery module 301, a power supply terminal 302, and a voltage conversion module 303.

[0054] The battery module 301 includes at least two batteries connected in series; the power supply terminal 302 is used to receive the power supply voltage input from the power supply device; the voltage conversion module 303 is connected to the power supply terminal 302 and the battery module 301, performs a first conversion process on the first voltage output by the battery module 301 to obtain a second voltage, and outputs the second voltage to the load; or, performs a second conversion process on the power supply voltage to obtain a third voltage, and outputs the third voltage to the battery module 301 to charge the battery module 301.

[0055] That is, in the voltage regulation circuit, the voltage conversion module 303 is still used to boost or buck the voltage. During discharge, the voltage conversion module 303 can perform a first conversion process on the first voltage output by the battery module 301 to obtain a second voltage, and then provide the second voltage to the load through its connection with the load. During charging, the voltage conversion module 303 can perform a second conversion process on the supply voltage provided by the power supply terminal 302 to obtain a third voltage, and then provide the third voltage to the battery module 301 through its connection with the battery module 301, thereby realizing the charging of the battery module 301.

[0056] Optionally, the voltage conversion module 303 in this solution supports a first operating mode and a second operating mode. The voltage conversion module 303 can operate in a target operating mode among the supported operating modes. The target operating mode is determined based on the total battery voltage of the battery module 301. The first operating mode is a mode in which the conversion ratio of the voltage conversion module 303 remains unchanged, and the second operating mode is a mode in which the conversion ratio of the voltage conversion module 303 is adjustable. The conversion ratio is the ratio between the input voltage and the output voltage of the voltage conversion module 303.

[0057] For example, the voltage conversion module 303 can be a charge pump, and the conversion ratio is the ratio between the input voltage and the output voltage of the charge pump. In traditional mode, the conversion ratio of the charge pump is usually a fixed 2:1. However, in this solution, the voltage conversion module also has a second operating mode, in which the conversion ratio of the voltage conversion module 303 is adjustable. For example, in addition to 2:1, the conversion ratio of the charge pump can also be 3:2 or other ratios based on actual needs; it is adjustable, and the specific ratio value is not limited here.

[0058] In the aforementioned supported operating modes, the target operating mode of the voltage regulation circuit is determined based on the total battery voltage of the battery module 301. When the current total battery voltage of the battery module 301 is within different ranges, the voltage conversion module 303 can be controlled to operate in different target operating modes to meet the requirement of lower voltage discharge for the battery module 301.

[0059] For example, the voltage conversion module 303 is also used to operate in a first operating mode when the total battery voltage of the battery module is greater than or equal to a first voltage threshold; or, the voltage conversion module 303 is also used to operate in a second operating mode when the total battery voltage of the battery module is less than the first voltage threshold. The first voltage threshold can be flexibly set by the developer. For example, if the first voltage threshold is 6.8V, the voltage conversion module can operate in the first operating mode when the total battery voltage of the battery module is greater than or equal to 6.8V, and operate in the second operating mode when the total battery voltage of the battery module is less than 6.8V.

[0060] In summary, the voltage regulation circuit of this application includes: a battery module, a power supply terminal, and a voltage conversion module. The battery module includes at least two batteries connected in series; the power supply terminal receives the power supply voltage input from the power supply device; the voltage conversion module performs a first transformation on the first voltage output from the battery module to obtain a second voltage and outputs the second voltage to the load; or performs a second transformation on the power supply voltage to obtain a third voltage and outputs the third voltage to the battery module to charge the battery module. In this solution, the voltage conversion module can operate in a target operating mode among the supported operating modes. The supported operating modes include at least a first operating mode and a second operating mode. The first operating mode is a mode where the conversion ratio of the voltage conversion module remains constant, and the second operating mode is a mode where the conversion ratio of the voltage conversion module is adjustable, where the conversion ratio is the ratio between the input voltage and the output voltage of the voltage conversion module. In other words, besides operating in a constant conversion ratio mode, the voltage conversion module can also operate in an adjustable conversion ratio mode. The adjustable conversion ratio mode allows the battery module to achieve a lower discharge voltage, enabling it to discharge for a longer period and expanding its support for lower voltage discharge, thus allowing for more efficient use of battery energy. Furthermore, flexibly adjusting the operating mode of the voltage conversion module based on the total battery voltage improves the accuracy and flexibility of controlling its operation.

[0061] In one possible implementation, the switching of the operating mode of the voltage conversion module described above can be controlled by a controller. For example, please refer to FIG4, which shows a schematic diagram of a voltage regulation circuit provided in an exemplary embodiment of this application. As shown in FIG4, the voltage regulation circuit includes: a battery module 401, a power supply terminal 402, a controller 403, and a voltage conversion module 404.

[0062] The connection relationship between the battery module 401, the power supply terminal 402, and the voltage conversion module 404 is the same as that shown in Figure 3 above, and will not be repeated here. The controller 403 is electrically connected to the battery module 401, and the controller 403 is also electrically connected to the voltage conversion module 404.

[0063] The controller 403 is used to obtain the total battery voltage of the battery module 401, and according to the total battery voltage, control the voltage conversion module to switch to the target working mode corresponding to the total battery voltage of the battery module.

[0064] For example, the battery module 401 described above includes at least two series-connected batteries, the number of which is N. The voltage of each battery is represented by Vbat1, Vbat2...VbatN, and the total battery voltage of the battery module is represented by V. 总 Let V represent this. 总=Vbat1 + Vbat2 ... + VbatN. Controller 403 determines V based on... 总 The size of the voltage determines which mode the voltage conversion module operates in. In one possible implementation, the developer can set a first voltage threshold at V... 总 When the voltage is greater than or equal to the first voltage threshold, the operating mode of the control voltage conversion module 404 is the first operating mode, at V 总 When the voltage is below the first voltage threshold, the operating mode of the control voltage conversion module 404 is the second operating mode.

[0065] With a first voltage threshold of 6.8V and a first operating mode of the traditional 2:1 ratio, the conversion ratio of the second operating mode differs from that of the first operating mode. At V 总 When the voltage is greater than or equal to 6.8V, the controller 403 can control the voltage conversion module 404 to operate in the first operating mode, that is, the target operating mode is the first operating mode, at which point the voltage is 6.8V. 总 When the voltage is less than 6.8V, the controller 403 can control the voltage conversion module 404 to work in the second working mode, that is, the target working mode is the second working mode.

[0066] In one possible implementation, the second operating mode can be further divided into a first sub-mode and a second sub-mode based on the conversion ratio of the voltage conversion module. The first sub-mode is a mode where the conversion ratio of the voltage conversion module is fixed, and the conversion ratio corresponding to the first sub-mode is different from that corresponding to the first operating mode. The second sub-mode is a mode where the conversion ratio of the voltage conversion module is not fixed, and in this mode, the conversion ratio of the voltage conversion module can be controlled to continuously change.

[0067] In this scheme, the first sub-mode can be called the fixed special ratio mode, and the second sub-mode can be called the fixed output mode. Although the conversion ratio of the first sub-mode is fixed, it is different from the conversion ratio of the first operating mode. In actual circuits, the conversion ratio of the first sub-mode can be flexibly set in advance by the developers.

[0068] For example, if the first working mode is the traditional 2:1 ratio mode, its conversion ratio is 2:1. The first sub-mode in the second working mode can be a fixed 3:2 ratio mode, and the conversion ratio of the first sub-mode is 3:2. Of course, it can also be set to other ratios (such as 3:5, 1:X, X:Y, etc.). Here, X and Y are both positive integers, that is, it can be any ratio other than 2:1.

[0069] Optionally, in the case of the above division into a first sub-mode and a second sub-mode, after the controller 403 obtains the total battery voltage of the battery module 401, in addition to comparing it with the first voltage threshold, it also needs to compare it with the second voltage threshold. The voltage conversion module 404 is also used to operate in the first sub-mode when the total battery voltage of the battery module is less than the first voltage threshold but greater than the second voltage threshold; or, the voltage conversion module 404 is also used to operate in the second sub-mode when the total battery voltage of the battery module is less than or equal to the second voltage threshold.

[0070] Optionally, the controller 403 determines the voltage range of the total battery voltage of the battery module 401 by comparing it with a first voltage threshold or a second voltage threshold, and then controls the voltage conversion module to operate in the target operating mode.

[0071] The first working mode is the traditional 2:1 ratio mode, with a conversion ratio of 2:1. The second working mode can be divided into two sub-modes: a fixed 3:2 ratio mode and a fixed output mode. To achieve the fixed output mode, the conversion ratio of the voltage conversion module 404 needs to be continuously changed to ensure a constant output voltage. The battery module 401 contains two batteries connected in series (battery one Vbat1 and battery two Vbat2). 总 =Vbat1+Vbat2, the first voltage threshold is 6.8V, the second voltage threshold is 5V, the voltage range is divided into the voltage range corresponding to 6.8V and 5V and the third voltage range is the voltage range corresponding to 5V and 6.8V.

[0072] If the controller obtains V 总 The voltage is greater than or equal to 6.8V, requiring the voltage conversion module 404 to operate in the traditional 2:1 proportional mode. If the controller obtains V... 总 For voltages greater than 5V and less than 6.8V, the voltage conversion module 404 needs to perform a mode switch, changing from the previous fixed 2:1 ratio mode corresponding to voltages higher than 6.8V to the fixed 3:2 ratio mode. If the controller obtains V... 总 If the voltage is less than or equal to 5V, the operating mode of the voltage conversion module 404 needs to be converted again to operate in fixed output mode.

[0073] Taking the discharge process as an example, the voltage conversion module 404 is used to perform a first transformation process on the first voltage output by the battery module 401 to obtain a second voltage, and then output the second voltage to the load. As the battery module 401 discharges, the first voltage will decrease. Please refer to Figure 5, which shows a schematic diagram of the operating mode switching of the voltage conversion module under different total battery voltage conditions according to an exemplary embodiment of this application, relating to Figure 4. As shown in Figure 5, as the battery discharges, the total battery voltage of the battery module continuously decreases. The operating mode of the voltage conversion module 404 switches once when it is below 6.8V and again when it is below 5V. This corresponds to the total battery voltage of the battery module falling within the aforementioned three voltage ranges, and the voltage conversion module operates in the corresponding target operating mode.

[0074] In one possible implementation, the voltage conversion module 404 is further configured to operate in a second sub-mode when the total battery voltage of the battery module is less than a first voltage threshold and greater than a third voltage threshold, wherein the third voltage threshold is less than the first voltage threshold and greater than the second voltage threshold; the voltage conversion module 404 is further configured to operate in a first sub-mode when the total battery voltage of the battery module is less than or equal to the third voltage threshold and greater than the second voltage threshold.

[0075] That is, the developers can also set a third voltage threshold, which is less than the first voltage threshold and greater than the second voltage threshold. In the process of determining the target working mode of the voltage conversion module based on the total battery voltage of the battery module, if the obtained total battery voltage of the battery module is less than the first voltage threshold and greater than the third voltage threshold, the target working mode of controlling the voltage conversion module 404 is the second sub-mode. If the obtained total battery voltage of the battery module is less than or equal to the third voltage threshold and greater than the second voltage threshold, the target working mode of controlling the voltage conversion module 404 is the first sub-mode.

[0076] Taking the voltage conversion module 404's multiple operating modes, including the traditional 2:1 ratio mode, fixed 3:2 ratio mode, and fixed output mode, as an example, the first voltage threshold is set to 6.8V, the second voltage threshold to 5V, and the third voltage threshold to 6V. After obtaining the total battery voltage of the battery module, the controller 403, if V... 总 The voltage is greater than or equal to 6.8V, requiring the voltage conversion module 404 to operate in the traditional 2:1 proportional mode. If the controller obtains V... 总 For voltages greater than 6V and less than 6.8V, the voltage conversion module 404 needs to perform a mode switch, changing from the previous fixed 2:1 ratio mode corresponding to voltages higher than 6.8V to the fixed output mode. If the controller obtains V... 总For voltages greater than 5V and less than 6V, the voltage conversion module 404 needs to perform another mode conversion, switching from the previous fixed output mode to the fixed 3:2 ratio mode. If the controller obtains V... 总 If the voltage is less than or equal to 5V, the operating mode of the voltage conversion module 404 needs to be converted again to operate in fixed output mode.

[0077] Taking the discharge process as an example, please refer to Figure 6, which shows a schematic diagram of the operating mode switching of the voltage conversion module under different total battery voltage conditions of the battery module according to an exemplary embodiment of this application. As shown in Figure 6, as the battery discharges, the total battery voltage of the battery module continuously decreases. The operating mode of the voltage conversion module 404 switches once when it is below 6.8V, once when it is below 6V, and once again when it is below 5V. The corresponding total battery voltage of the battery module is in the above four voltage ranges, and the voltage conversion module operates in the corresponding target operating mode.

[0078] It should be noted that in Figures 5 and 6 above, when the voltage conversion module is operating in the second sub-mode, the output voltage of the voltage conversion module is a constant voltage of 3.3V, which is exemplary and determined based on the constraint between the output voltage and the input voltage of the voltage conversion module; for example, the constraint is as follows: 2*Vout>Vin. Here, Vout represents the output voltage of the voltage conversion module, and Vin represents the input voltage of the voltage conversion module.

[0079] Optionally, Figures 5 and 6 are examples of the discharge scenario. When the voltage regulation circuit provides the external power input voltage through the power supply terminal, and the voltage conversion module converts the power supply voltage to charge the first and second batteries, the working mode of the voltage conversion module is still determined based on the total battery voltage of the battery module, and the logic is the same as above. The only difference is that the input voltage of the voltage conversion module in the discharge scenario is equivalent to the output voltage in the charging scenario, and the output voltage of the voltage conversion module in the discharge scenario is equivalent to the input voltage in the charging scenario (i.e., reversed). This will not be elaborated further here.

[0080] In one possible implementation, the voltage conversion module 404 includes a first switch group, a second switch group, a target switch transistor, and a target inductor; the target switch transistor is connected to the first switch group and the second switch group respectively, and the target inductor is also connected to the first switch group and the second switch group respectively, and the target switch transistor and the target inductor are connected in parallel; the voltage conversion module 404 is further configured to, in a first operating mode, turn on the target switch transistor to short-circuit the target inductor; or, the voltage conversion module 404 is further configured to, in a second operating mode, turn off the target switch transistor to turn on the target inductor; wherein, when the target inductor is turned on, it is used to carry the voltage difference between the input voltage and the output voltage of the voltage conversion module.

[0081] That is, in the first operating mode, the target switch is in the on state to short-circuit the target inductor; while in the second operating mode, the target switch is in the off state to turn on the target inductor; wherein, when the target inductor is turned on, it is used to carry the voltage difference between the input voltage and the output voltage of the voltage conversion module.

[0082] Please refer to Figure 7, which shows a schematic diagram of the circuit structure of a voltage conversion module according to an exemplary embodiment of this application. It includes a first switch group 701, a second switch group 702, a target switch transistor 703, and a target inductor 704. One port of the voltage conversion module is led out from the first switch group 701, and the other port is led out from the second switch group 702. The target switch transistor 703 and the target inductor 704 are connected in parallel between the first switch group 701 and the second switch group 702. In actual operation, the voltage conversion module is bidirectional. If, in Figure 7, the current flows in from the left port and out from the right port, then the left port is the input terminal, and the right port is the output terminal. Conversely, if, in Figure 7, the current flows in from the right port and out from the left port, then the right port is the input terminal, and the left port is the output terminal.

[0083] In Figure 4 above, using the circuit structure of Figure 7, when the voltage conversion module switches between the various operating modes, the target inductor can be short-circuited by controlling the target switching transistor to be turned on, and the voltage conversion module will operate in the first operating mode; or, the target inductor can be turned on by controlling the target switching transistor to be turned off, and the voltage conversion module will operate in the second operating mode.

[0084] In one possible implementation, each of the first and second switch groups includes four switching transistors and other pathways. Please refer to Figure 8, which shows a schematic diagram of the circuit structure of another voltage conversion module of Figure 7, according to an exemplary embodiment of this application. As shown in Figure 8, it includes a first switch group 801, a second switch group 802, a target switching transistor 803, and a target inductor 804; the first switch group 801 includes four switching transistors (S1, S2, S5, S6), which are connected in series in a ring structure. A first port is led out between the lines connecting S1 and S2, and connected to a first capacitor C. F1 A second port is led out between the lines connecting S1 and S5, and the input capacitor C is connected to it. IN A third port is led out between the lines connecting S5 and S6, and connected to the second capacitor C. F2 Between the lines S2 and S6, a fourth port and a fifth port are led out. The fourth port is connected to the first terminal of the target switch 803, and the fifth port is connected to the first terminal of the target inductor 804. In Figure 8, the target switch 803 is represented by S9.

[0085] The second switch group 802 includes four switching transistors (S3, S4, S7, S8), which are connected in series. However, one end of S4 and S8 is grounded. A sixth port is led out between the connection of S3 and S4, and connected to the first capacitor C mentioned above. F1 The connection forms a capacitor path. A seventh port is led out between the lines connecting S3 and S7, and the output capacitor C is connected to it. OUT The seventh port can also be connected to the second terminal of the target switch 803. An eighth port is also led out between the lines S3 and S7, and this eighth port is connected to the second terminal of the target inductor 804. A ninth port is led out between the lines S7 and S8, and is connected to the aforementioned second capacitor C. F2 This forms a capacitive path.

[0086] In the structure shown in Figure 8, the input capacitor C IN The two ends serve as the input terminals of the voltage conversion module, and the output capacitor C OUT The two ends serve as the output terminals of the voltage conversion module. Although they are based on the input and output capacitors, in actual operation, they are bidirectional. If the current flows from the output capacitor C... OUT The water flows in from both ends, from the input capacitor C IN The current flows out from both ends, at which point the input capacitor C... IN The two ends become the output terminals of the voltage conversion module, and the output capacitor C OUT The two ends serve as the input terminals for the voltage conversion module.

[0087] Optionally, in the structure shown in Figure 7 or Figure 8 above, the controller can control the operating mode of the voltage conversion module based on adjusting the duty cycle of each switch in the first and second switch groups. That is, the voltage conversion module is also used to adjust the duty cycle of each switch in the first and second switch groups so that the current conversion ratio of the voltage conversion module in the second operating mode is different from the conversion ratio in the first operating mode.

[0088] For example, taking the voltage conversion module 404's multiple operating modes, including the first and second operating modes, as an example, in Figure 8 above, the target switch S9 is normally open, while S2 and S6 are normally closed. Switches S1, S3, and S4, together with the target inductor L, form one phase of a step-down circuit, and switches S5, S7, and S8, together with the target inductor L, form another phase of a step-down circuit. By controlling the turn-on and turn-off times of switches S1, S3, S4, S5, S7, and S8, the second operating mode can be achieved. In the second operating mode, the output voltage remains constant when the input voltage varies within a certain range.

[0089] In one possible implementation described above, the second operating mode is divided into a first sub-mode and a second sub-mode. The first sub-mode is a fixed 3:2 ratio mode, and the second sub-mode is a fixed output mode. In the second sub-mode, the voltage conversion module adjusts the duty cycle D of each switch in real time according to changes in the output or input voltage, thereby maintaining a constant output voltage – a closed-loop operating state. The first sub-mode can be seen as a special case of the second sub-mode; when the voltage conversion module controls the duty cycle of each switch, it operates in a fixed 3:2 ratio mode.

[0090] If it needs to work in the first working mode, such as the traditional 2:1 ratio mode mentioned above, the target switch S9 is in the normally closed state. At this time, the target inductor is short-circuited, which is the same as the working principle of the traditional 2:1 ratio mode, realizing the positive 2:1 input and output function.

[0091] Optionally, the voltage conversion module can be a charge pump CP, and in this scheme, the charge pump CP can include three operating modes. Furthermore, the power supply can be a charging / discharging circuit unit in an electronic device. Please refer to Figure 9, which shows a schematic diagram of the circuit structure of a voltage regulation circuit according to an exemplary embodiment of this application. As shown in Figure 9, it includes a charging / discharging circuit unit 901, a first battery 902, a second battery 903, and a charge pump CP 904. The charging / discharging circuit unit 901, as shown in Figure 9, serves as the power supply terminal and can be connected to an external power source via a USB interface. The charge pump CP 904 can, in the discharging state, perform a first transformation on the first voltage output from the battery side to obtain a second voltage and output the second voltage (i.e., Vsys in the figure) to the load; or, in the charging state, the charge pump CP 904 can perform a second transformation on the supply voltage to obtain a third voltage and output the third voltage to the battery module to charge both batteries.

[0092] The charging / discharging circuit 901 is composed of the various electronic components shown in Figure 9, and its output voltage Vsys represents the voltage ultimately supplied to the load for operation. The charging / discharging circuit can provide standard charging and fast charging functions, as well as the function of providing operating voltage to the load.

[0093] In Figure 9 above, when the first battery 902 and the second battery 903 are charged via the USB interface at the power supply end, after the current is input from the charging / discharging circuit unit 901, part of it can provide power to the load (i.e., Vsys in the figure), and the other part enters the charge pump CP, which converts the current and outputs it to the first battery 902 and the second battery 903 for charging. The current flow is shown in the charging current flow diagram in Figure 9. When the first battery 902 and the second battery 903 are discharging the load, the current flows out of the first battery 902 and the second battery 903, enters the charge pump CP, which converts the current and outputs it to the load to provide power to the load (i.e., Vsys in the figure). The current flow is shown in the charging current flow diagram in Figure 9.

[0094] In actual operation, the internal discharge and charging states of electronic devices typically switch automatically. For example, when connected to a USB circuit, the load needs to draw a certain current as its load current, and this load current fluctuates significantly under different operating conditions. Therefore, when the load current Iload is greater than the output current of the charging / discharging circuit unit 901, the CP automatically switches the power supply direction from charging to discharging. When the load current Iload is less than the output current of the charging / discharging circuit unit 901, the CP automatically switches the power supply direction again from discharging to charging. During this process, the CP in this solution also automatically reverses, still determining its operating mode based on the total battery voltage of the battery module. That is, in the discharging state, if the total battery voltage of the battery module is between 5V and 6.8V, it operates in a fixed 2:3 ratio mode. In the charging state, if the total battery voltage of the battery module is between 5V and 6.8V, it still operates in a fixed 2:3 ratio mode, but in reverse. Other operating modes are similar and will not be elaborated here.

[0095] In summary, the voltage regulation circuit of this application includes: a battery module, a power supply terminal, and a voltage conversion module. The battery module includes at least two batteries connected in series; the power supply terminal receives the power supply voltage input from the power supply device; the voltage conversion module performs a first transformation on the first voltage output from the battery module to obtain a second voltage and outputs the second voltage to the load; or performs a second transformation on the power supply voltage to obtain a third voltage and outputs the third voltage to the battery module to charge the battery module. In this solution, the voltage conversion module can operate in a target operating mode among the supported operating modes. The supported operating modes include at least a first operating mode and a second operating mode. The first operating mode is a mode where the conversion ratio of the voltage conversion module remains constant, and the second operating mode is a mode where the conversion ratio of the voltage conversion module is adjustable, where the conversion ratio is the ratio between the input voltage and the output voltage of the voltage conversion module. In other words, besides operating in a constant conversion ratio mode, the voltage conversion module can also operate in an adjustable conversion ratio mode. The adjustable conversion ratio mode allows the battery module to achieve a lower discharge voltage, enabling it to discharge for a longer period and expanding its support for lower voltage discharge, thus allowing for more efficient use of battery energy. Furthermore, flexibly adjusting the operating mode of the voltage conversion module based on the total battery voltage improves the accuracy and flexibility of controlling its operation.

[0096] In addition, the voltage conversion module in this solution does not require mode switching for charging and discharging state switching, and can achieve natural switching. This solves the problem of battery charging and discharging state switching caused by changes in the load current of electronic devices when charging, and prevents power failure and restart problems caused by the battery not switching from charging to discharging mode in time due to increased load Iload.

[0097] Below is a method embodiment of a circuit control method provided in this application. For details not disclosed in this method embodiment, please refer to the content of the voltage regulation circuit embodiment provided above in this application. Please refer to FIG10, which shows a flowchart of a circuit control method provided in an exemplary embodiment of this application. As shown in FIG10, this circuit control method can be applied to the controller of the voltage regulation circuit in the above embodiments. As shown in FIG10, the circuit control method may include the following steps:

[0098] Step 1001: Obtain the total battery voltage of the battery module.

[0099] The structure of the voltage regulation circuit can be referred to the descriptions in the above embodiments, and will not be repeated here.

[0100] Step 1002: Based on the total battery voltage of the battery module, control the voltage conversion module to operate in the target operating mode among the supported operating modes. The supported operating modes include at least a first operating mode and a second operating mode. The first operating mode is a mode in which the conversion ratio of the voltage conversion module remains unchanged, and the second operating mode is a mode in which the conversion ratio of the voltage conversion module is adjustable. The conversion ratio is the ratio between the input voltage and the output voltage of the voltage conversion module.

[0101] Optionally, in this solution, the controller, based on the obtained total battery voltage of the battery module, controls the voltage conversion module to operate in the target operating mode among the supported operating modes according to the corresponding control logic. The specific control logic has been described in the above embodiments and will not be repeated here.

[0102] Optionally, when the controller executes the target operating mode of controlling the voltage conversion module to operate in the supported operating modes based on the total battery voltage of the battery module, it may do so as follows: when the total battery voltage of the battery module is greater than or equal to a first voltage threshold, control the voltage conversion module to operate in the first operating mode; or, when the total battery voltage of the battery module is less than the first voltage threshold, control the voltage conversion module to operate in the second operating mode.

[0103] Optionally, the second working mode may also include a first sub-mode and a second sub-mode;

[0104] The first sub-mode is a mode in which the conversion ratio of the voltage conversion module is fixed, and the conversion ratio corresponding to the first sub-mode is different from the conversion ratio corresponding to the first working mode.

[0105] The second sub-mode is a mode in which the conversion ratio of the voltage conversion module is not fixed. When the voltage conversion module is in the second sub-mode, the output voltage of the voltage conversion module is a constant voltage.

[0106] When the controller controls the voltage conversion module to operate in the target operating mode among the supported operating modes based on the total battery voltage of the battery module, it can do so as follows: If the total battery voltage of the battery module is less than a first voltage threshold but greater than a second voltage threshold, the voltage conversion module is controlled to operate in the first sub-mode; where the first voltage threshold is greater than the second voltage threshold; or...

[0107] When the total battery voltage of the battery module is less than or equal to the second voltage threshold, the control voltage conversion module operates in the second sub-mode.

[0108] Optionally, the specific process by which the controller controls the voltage conversion module to operate in the target operating mode among the supported operating modes based on the total battery voltage of the battery module can also be as follows: when the total battery voltage of the battery module is less than the first voltage threshold and greater than the third voltage threshold, the voltage conversion module is controlled to operate in the second sub-mode, where the third voltage threshold is less than the first voltage threshold and greater than the second voltage threshold; when the total battery voltage of the battery module is less than or equal to the third voltage threshold and greater than the second voltage threshold, the voltage conversion module is controlled to operate in the first sub-mode.

[0109] Optionally, the value of the constant voltage is determined based on the constraints between the output voltage and the input voltage of the voltage conversion module; the constraints include at least the minimum ratio between the output voltage and the input voltage of the voltage conversion module.

[0110] In summary, the voltage regulation circuit of this application includes: a battery module, a power supply terminal, and a voltage conversion module. The battery module includes at least two batteries connected in series; the power supply terminal receives the power supply voltage input from the power supply device; the voltage conversion module performs a first transformation on the first voltage output from the battery module to obtain a second voltage and outputs the second voltage to the load; or performs a second transformation on the power supply voltage to obtain a third voltage and outputs the third voltage to the battery module to charge the battery module. In this solution, the voltage conversion module can operate in a target operating mode among the supported operating modes. The supported operating modes include at least a first operating mode and a second operating mode. The first operating mode is a mode where the conversion ratio of the voltage conversion module remains constant, and the second operating mode is a mode where the conversion ratio of the voltage conversion module is adjustable, where the conversion ratio is the ratio between the input voltage and the output voltage of the voltage conversion module. In other words, besides operating in a constant conversion ratio mode, the voltage conversion module can also operate in an adjustable conversion ratio mode. The adjustable conversion ratio mode allows the battery module to achieve a lower discharge voltage, enabling it to discharge for a longer period and expanding its support for lower voltage discharge, thus allowing for more efficient use of battery energy. Furthermore, flexibly adjusting the operating mode of the voltage conversion module based on the total battery voltage improves the accuracy and flexibility of controlling its operation.

[0111] Optionally, embodiments of this application also provide an electronic device, which includes at least one voltage regulation circuit as shown in the above embodiments.

[0112] Optionally, taking a mobile phone as an example, the mobile phone includes the voltage regulation circuit shown in Figure 9 above, and the controller can be the mobile phone's controller. In a mobile phone with two series-connected batteries, the CP using this scheme has three operating modes: the traditional 2:1 ratio mode, the fixed 3:2 ratio mode, and the fixed output mode. When the mobile phone is discharging through the batteries, the first preset voltage threshold set in the mobile phone is 6.8V, and the second preset voltage threshold is 5V. Then, let Vbat1 represent the battery voltage of the first battery, Vbat2 represent the battery voltage of the second battery, and Vbat represent the sum of the voltages of the first and second batteries. In the discharging state, if the terminal device obtains Vbat > 6.8V, it is necessary to control the CP to work in the fixed 2:1 ratio mode. At this time, the power supply voltage Vsys provided to the load (i.e., the operating system) is Vbat / 2. As discharge continues, the total battery voltage of the battery module will continue to decrease. When the voltage Vbat obtained by the phone is greater than or equal to 5V and less than or equal to 6.8V, the CP (Power Supply Controller) switches from the previous fixed 2:1 ratio mode (corresponding to voltages above 6.8V) to a fixed 3:2 ratio mode. At this time, the supply voltage Vsys provided to the load is Vbat * 2 / 3. As discharge continues, the total battery voltage of the battery module will continue to decrease. When the total battery voltage Vbat obtained by the phone is less than 5V, the CP switches again to a fixed output mode. At this time, the CP outputs a fixed voltage of 3.3V (i.e., the supply voltage Vsys provided to the load is 3.3V). When the total battery voltage Vbat is less than 5V, the CP maintains this operating mode until the battery discharge is complete.

[0113] In terms of charging, the supply voltage provided by the charger (power supply end) is converted into the load supply voltage Vsys by the charging and discharging circuit unit. Vsys charges the dual batteries after the CP reverses its operation. Please refer to Figure 11, which shows a schematic diagram of the voltage regulation circuit in a mobile phone controlling the switching of the CP's operating mode during charging, according to an exemplary embodiment of this application. As shown in Figure 11, when the total battery voltage of the battery module Vbat = Vbat1 + Vbat2 < 5V, the CP operates in a reverse fixed output mode, that is, the input voltage is constant and the output voltage is variable. At this time, the CP achieves small-current charging of the dual batteries (small-current charging is required when the battery voltage is extremely low) until the total battery voltage Vbat of the battery module reaches 5V. Then the CP switches to a fixed 3:2 ratio mode. At this time, the CP adjusts the ratio of output voltage to input voltage to a fixed 2:3, which is also equivalent to the reverse in Figure 5 above. The charging and discharging circuit unit operates in a constant current output mode, and the operating current at both ends of the CP is also 2:3 (that is, the battery charging current: the current flowing into the output end of the CP is 2:3). Because a certain load current needs to be drawn from Vsys, and the load current fluctuates significantly under different operating conditions, the CP automatically switches its power supply direction from charging to discharging when the load current Iload exceeds the output current of the charging / discharging circuit unit. This process does not require mode switching. Similarly, when the load current Iload decreases, the CP automatically switches back from discharging to charging. When the battery voltage Vbat is charged to 6.8V, the CP switches its mode again to a fixed 2:1 reverse operating mode. At this time, the voltage and current across the CP are doubled. Based on the changes in the load current Iload, the CP can freely switch between charging and discharging states.

[0114] Optionally, embodiments of this application also provide a chip that includes a processor and a memory. The memory stores a computer program, which is executed by the processor to implement the circuit control method as described in the above method embodiments.

[0115] Optionally, embodiments of this application also provide a computer-readable medium storing a computer program that is executed by a processor to implement all or part of the steps performed by an electronic device in the circuit control methods of the various embodiments described above.

[0116] It should be noted that the device provided in the above embodiments is only illustrated by the division of the above functional modules when controlling electronic devices. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the device and method embodiments provided in the above embodiments belong to the same concept, and their specific implementation process can be found in the method embodiments, which will not be repeated here.

[0117] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0118] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

[0119] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A voltage regulation circuit, characterized in that, include: A battery module, comprising at least two batteries connected in series; The power supply terminal is used to receive the power supply voltage input from the power supply device. A voltage conversion module is connected to the power supply terminal and the battery module. It performs a first conversion process on the first voltage output by the battery module to obtain a second voltage and outputs the second voltage to the load; or, it performs a second conversion process on the power supply voltage to obtain a third voltage and outputs the third voltage to the battery module. The voltage conversion module supports two operating modes: a first operating mode and a second operating mode. The first operating mode is a mode in which the conversion ratio of the voltage conversion module remains unchanged, and the second operating mode is a mode in which the conversion ratio of the voltage conversion module is adjustable. The conversion ratio is the ratio between the input voltage and the output voltage of the voltage conversion module.

2. The voltage regulation circuit according to claim 1, characterized in that, The voltage conversion module operates in the first operating mode when the total battery voltage of the battery module is greater than or equal to a first voltage threshold; or, When the total battery voltage of the battery module is less than the first voltage threshold, the voltage conversion module operates in the second operating mode.

3. The voltage regulation circuit according to claim 1, characterized in that, The second working mode also includes a first sub-mode and a second sub-mode; The first sub-mode is a mode in which the conversion ratio of the voltage conversion module is fixed, and the conversion ratio corresponding to the first sub-mode is different from the conversion ratio corresponding to the first working mode. The second sub-mode is a mode in which the conversion ratio of the voltage conversion module is not fixed. When the voltage conversion module is in the second sub-mode, the output voltage of the voltage conversion module is a constant voltage. The voltage conversion module operates in the first sub-mode when the total battery voltage of the battery module is less than a first voltage threshold but greater than a second voltage threshold; the first voltage threshold is greater than the second voltage threshold; or... The voltage conversion module operates in the second sub-mode when the total battery voltage of the battery module is less than or equal to the second voltage threshold.

4. The voltage regulation circuit according to claim 3, characterized in that, The voltage conversion module is further configured to operate in the second sub-mode when the total battery voltage of the battery module is less than the first voltage threshold and greater than the third voltage threshold, wherein the third voltage threshold is less than the first voltage threshold and greater than the second voltage threshold. The voltage conversion module is also used to operate in the first sub-mode when the total battery voltage of the battery module is less than or equal to the third voltage threshold and greater than the second voltage threshold.

5. The voltage regulation circuit according to claim 3, characterized in that, The value of the constant voltage is determined based on the constraint between the output voltage of the voltage conversion module and the input voltage of the voltage conversion module; the constraint includes at least the minimum ratio between the output voltage and the input voltage of the voltage conversion module.

6. The voltage regulation circuit according to any one of claims 1 to 5, characterized in that, The voltage conversion module includes a first switch group, a second switch group, a target switch transistor, and a target inductor; the target switch transistor is connected to the first switch group and the second switch group respectively, and the target inductor is also connected to the first switch group and the second switch group respectively, and the target switch transistor and the target inductor are connected in parallel; In the first operating mode, the target switch is in the on state to short-circuit the target inductor; or, In the second operating mode, the target switch is in the off state to turn on the target inductor; wherein, when the target inductor is turned on, it is used to carry the voltage difference between the input voltage and the output voltage of the voltage conversion module.

7. The voltage regulation circuit according to claim 6, characterized in that, The voltage conversion module further adjusts the duty cycle of each switch in the first and second switch groups so that the current conversion ratio of the voltage conversion module in the second operating mode is different from the conversion ratio in the first operating mode.

8. The voltage regulation circuit according to claim 6, characterized in that, The first switch group includes four switching transistors (S1, S2, S5, S6), which are connected in series and form a ring structure. A first port is included between the lines connecting S1 and S2, and the first port is connected to a first capacitor C. F1 A second port is included between the lines connecting S1 and S5, and the second port is connected to the input capacitor C. IN A third port is included between the lines S5 and S6, and the third port is connected to the second capacitor C. F2 Between the lines of S2 and S6, there are a fourth port and a fifth port. The fourth port is connected to the first end of the target switching transistor, and the fifth port is connected to the first end of the target inductor. The second switch group includes four switching transistors (S3, S4, S7, S8), which are connected in series. One end of S4 is grounded, and the other end of S4 is connected to S3. S3 is connected to S7, and S7 is connected to S8. The other end of S8 is grounded. A sixth port is included between the lines connecting S3 and S4, and this sixth port is connected to the first capacitor C. F1 The connection includes a seventh port between the lines connecting S3 and S7, and this seventh port is connected to the output capacitor C. OUT The connection includes a seventh port, which is also connected to the second terminal of the target switching transistor. An eighth port is included between the lines S3 and S7, and this eighth port is connected to the second terminal of the target inductor. A ninth port is included between the lines S7 and S8, and this ninth port is connected to the second capacitor C. F2 connect.

9. The voltage regulation circuit according to claim 8, characterized in that, When the voltage conversion module is operating in the second operating mode, the target switch is normally open, and switches S2 and S6 are normally closed. Switches S1, S3, and S4 form a step-down circuit with the target inductor, and switches S5, S7, and S8 form another step-down circuit with the target inductor.

10. The voltage regulation circuit according to any one of claims 1 to 9, characterized in that, The voltage regulation circuit also includes a controller; The controller is used to control the voltage conversion module to switch to a target operating mode corresponding to the total battery voltage of the battery module, based on the total battery voltage of the battery module.

11. A circuit control method, characterized in that, A controller for a voltage regulation circuit, the voltage regulation circuit including a controller, a battery module, a power supply terminal, and a voltage conversion module, the battery module including at least two batteries connected in series; the power supply terminal for receiving a power supply voltage input from a power supply device; the voltage conversion module connected to the power supply terminal and the battery module, performing a first transformation process on a first voltage output from the battery module to obtain a second voltage, and outputting the second voltage to a load; or, performing a second transformation process on the power supply voltage to obtain a third voltage, and outputting the third voltage to the battery module; the method includes: Obtain the total battery voltage of the battery module; Based on the total battery voltage of the battery module, control the voltage conversion module to operate in the target operating mode among the supported operating modes; The voltage conversion module supports two operating modes: a first operating mode and a second operating mode. The first operating mode is a mode in which the conversion ratio of the voltage conversion module remains unchanged, and the second operating mode is a mode in which the conversion ratio of the voltage conversion module is adjustable. The conversion ratio is the ratio between the input voltage and the output voltage of the voltage conversion module.

12. The method according to claim 11, characterized in that, The step of controlling the voltage conversion module to operate in a target operating mode among the supported operating modes based on the total battery voltage of the battery module includes: When the total battery voltage of the battery module is greater than or equal to a first voltage threshold, the voltage conversion module is controlled to operate in the first operating mode; or, When the total battery voltage of the battery module is less than the first voltage threshold, the voltage conversion module is controlled to operate in the second operating mode.

13. The method according to claim 11, characterized in that, The second working mode also includes a first sub-mode and a second sub-mode; The first sub-mode is a mode in which the conversion ratio of the voltage conversion module is fixed, and the conversion ratio corresponding to the first sub-mode is different from the conversion ratio corresponding to the first working mode. The second sub-mode is a mode in which the conversion ratio of the voltage conversion module is not fixed. When the voltage conversion module is in the second sub-mode, the output voltage of the voltage conversion module is a constant voltage. The step of controlling the voltage conversion module to operate in a target operating mode among the supported operating modes based on the total battery voltage of the battery module includes: When the total battery voltage of the battery module is less than a first voltage threshold but greater than a second voltage threshold, the voltage conversion module is controlled to operate in the first sub-mode; the first voltage threshold is greater than the second voltage threshold; or... When the total battery voltage of the battery module is less than or equal to the second voltage threshold, the voltage conversion module is controlled to operate in the second sub-mode.

14. The method according to claim 13, characterized in that, The step of controlling the voltage conversion module to operate in a target operating mode among the supported operating modes based on the total battery voltage of the battery module includes: When the total battery voltage of the battery module is less than the first voltage threshold and greater than the third voltage threshold, the voltage conversion module is controlled to operate in the second sub-mode, where the third voltage threshold is less than the first voltage threshold and greater than the second voltage threshold. When the total battery voltage of the battery module is less than or equal to the third voltage threshold and greater than the second voltage threshold, the voltage conversion module is controlled to operate in the first sub-mode.

15. The method according to claim 13, characterized in that, The value of the constant voltage is determined based on the constraint between the output voltage of the voltage conversion module and the input voltage of the voltage conversion module; the constraint includes at least the minimum ratio between the output voltage and the input voltage of the voltage conversion module.

16. The method according to any one of claims 11 to 15, characterized in that, In the first operating mode, the target switch is in the on state to short-circuit the target inductor; or, In the second operating mode, the target switch is in the off state to turn on the target inductor; The voltage conversion module includes a first switch group, a second switch group, a target switch transistor, and a target inductor. The target switch transistor is connected to the first switch group and the second switch group, and the target inductor is also connected to the first switch group and the second switch group. The target switch transistor and the target inductor are connected in parallel. When the target inductor is turned on, it is used to carry the voltage difference between the input voltage and the output voltage of the voltage conversion module.

17. The method according to claim 16, characterized in that, The method further includes: By adjusting the duty cycle of each switch in the first and second switch groups, the conversion ratio of the voltage conversion module in the second operating mode is different from that in the first operating mode.

18. The method according to claim 16, characterized in that, The target operating mode for controlling the voltage conversion module to operate within the supported operating modes includes: The operating mode of the voltage conversion module is controlled by adjusting the duty cycle of each switch in the first and second switch groups.

19. A chip, characterized in that, The chip includes a processor and a memory, the memory storing a computer program that is executed by the processor to implement the circuit control method as described in any one of claims 11 to 18.

20. An electronic device, characterized in that, The electronic device includes at least one voltage regulation circuit as described in any one of claims 1 to 10, or includes a chip as described in claim 19.

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