Power supply switching circuit, power supply system, and mobile device

Abstract

The embodiment of the application discloses a power supply switching circuit, a power supply system and a mobile device, and belongs to the technical field of electronics. The circuit comprises a first power supply module, a second power supply module, a power supply switching module and a control module. The control module is used for controlling the power supply switching module according to voltage information of the first power supply module, so that the first power supply module or the second power supply module supplies power to the load. The voltage information is used for indicating a first working state of the first power supply module, and the first working state is a normal state or an abnormal state. The application can uninterruptedly supply power to the load in the mobile device and / or robot, and thus the power supply reliability can be improved.

Description

Technical Field

[0001] This application relates to the field of electronic technology, and includes, but is not limited to, a power supply switching circuit, a power supply system, and a mobile device. Background Technology

[0002] With the rapid development of electronic technology, all kinds of electronic devices have become popular in people's work and life, such as robots and monitoring equipment.

[0003] In related technologies, taking a robot as an example, technicians typically install a power conversion module inside the robot to convert the voltage output from the battery or external power source according to the needs of each module within the electronic device. The converted voltage is then output to each module within the electronic device to power the robot.

[0004] However, the related technical solutions have the problem of being unable to provide uninterrupted power to electronic devices. In other words, this solution suffers from poor power supply reliability. Summary of the Invention

[0005] In view of this, the power switching circuit, power supply system, and mobile device provided in the embodiments of this application can provide uninterrupted power supply to the load in the mobile device and / or robot, thereby improving power supply reliability. The power switching circuit, power supply system, and mobile device provided in the embodiments of this application are implemented as follows: A first aspect of this application provides a power supply switching circuit, the power supply switching circuit comprising: a first power supply module, a second power supply module, a power switching module, and a control module; The first power supply module, the second power supply module, and the control module are respectively connected to the power switching module. The second power supply module is used to connect to the backup power supply, and the power switching module is used to connect to the load. The control module is used to control the power switching module according to the voltage information of the first power supply module, so that the first power supply module or the second power supply module supplies power to the load. The voltage information is used to indicate the first operating state of the first power supply module, which is either a normal state or an abnormal state.

[0006] Optionally, the control module is used to control the power switching module to turn on the first transmission channel between the first power supply module and the load and turn off the second transmission channel between the second power supply module and the load when the first working state is determined to be normal based on the voltage information of the first power supply module. The control module is also used to control the power switching module to turn on the second transmission channel and turn off the first transmission channel when the first working state is determined to be abnormal based on the voltage information of the first power supply module.

[0007] Optionally, the power switching module includes: a first switching unit and a second switching unit; The first end of the first switching unit is connected to the positive power supply terminal of the first power supply module, the second end of the first switching unit is connected to the positive power supply terminal of the load, the third end of the first switching unit is connected to the first output terminal of the control module, and the fourth end of the first switching unit is connected to the first end of the second switching unit. The second end of the second switching unit is connected to the positive power supply terminal of the second power supply module, and the third end of the second switching unit is connected to the second output terminal of the control module. The first switching unit is used to turn on when the first working state is normal, so as to turn on the first transmission channel, and to turn off when the first working state is abnormal, so as to turn off the first transmission channel. The second switching unit is used to turn off the second transmission channel when the first working state is in a normal state, and to turn on the second transmission channel when the first working state is in an abnormal state.

[0008] Optionally, the first switching unit includes a first switching transistor and a second switching transistor; The source of the first switching transistor is connected to the positive power supply terminal of the first power supply module, the drain of the first switching transistor is connected to the drain of the second switching transistor, and the source of the second switching transistor is connected to the positive power supply terminal of the load and the first terminal of the second switching unit, respectively. The gates of the first switching transistor and the second switching transistor are respectively connected to the output terminal of the control module; The first switch and the second switch are turned on when the first operating state is normal, and turned off when the first operating state is abnormal.

[0009] Optionally, the second switching unit includes a third switch and a fourth switch; The source of the third switch is connected to the positive power supply terminal of the second power supply module, the drain of the third switch is connected to the drain of the fourth switch, and the source of the fourth switch is connected to the source of the second switch. The gates of the third and fourth switching transistors are respectively connected to the second output terminal of the control module. The third switch is turned on when the first operating state is in a normal or abnormal state, and the fourth switch is turned off when the first operating state is in a normal state and turned on when the first operating state is in an abnormal state; the voltage level of the first power supply module outputting the first electrical energy to the load through the first transmission channel is greater than the voltage level of the second electrical energy output by the second power supply module to the load through the second transmission channel.

[0010] Optionally, the power supply switching circuit further includes a voltage conversion module; The first terminal of the voltage conversion module is used to input the second working voltage, the second terminal of the voltage conversion module is connected to the power switching module, and the third terminal of the voltage conversion module is connected to the power supply terminal of the control module. The second power supply module is used to input voltage to the voltage conversion module through the power switching module when the voltage conversion module does not receive the second operating voltage. The voltage conversion module is used to convert the second operating voltage or the voltage input by the power switching module into the target voltage required by the control module when it receives the second operating voltage or the voltage input by the power switching module, and output the target voltage to the control module.

[0011] Optionally, the voltage conversion module further includes: a first conversion unit, a second conversion unit, a first diode, and a second diode; The first terminal of the first conversion unit is used to input the second working voltage, the second terminal of the first conversion unit is connected to the positive terminal of the first diode, the negative terminal of the first diode is connected to the negative terminal of the second diode and the first terminal of the second conversion unit, the positive terminal of the second diode is connected to the power switching module, and the second terminal of the second conversion unit is connected to the power supply terminal of the control module. The first conversion unit is used to step down the second operating voltage and output the stepped-down voltage to the second conversion unit through the first diode; The second conversion unit is used to convert the stepped-down voltage or the voltage input by the second power supply module through the power switching module into the target voltage, and output the target voltage to the control module.

[0012] Optionally, the power supply switching circuit further includes a third power supply module; The third power supply module is connected to the second power supply module and the power switching module respectively, and the third power supply module is used to input the first working voltage; The third power supply module is used to output charging power to the second power supply module when the second power supply module is not outputting the second power energy and the backup power supply is not fully charged.

[0013] A second aspect of this application also provides a power supply system, comprising at least: any of the power supply switching circuits described in the first aspect above, a main power supply for providing operating voltage to a first power supply module, and a backup power supply for providing operating voltage to a second power supply module.

[0014] A third aspect of the embodiments of this application also provides a mobile device, which includes at least: a load, a main power supply for providing operating voltage to a first power supply module, a backup power supply for providing operating voltage to a second power supply module, and any of the power supply switching circuits described in the first aspect above; Alternatively, it may include at least: the load and the power supply system described in the second aspect above.

[0015] The power switching circuit, power supply system, and mobile device provided in this application embodiment are configured with a first power supply module, a second power supply module, a power switching module, and a control module in the power switching circuit. The first power supply module, the second power supply module, and the control module are respectively connected to the power switching module. The second power supply module is used to connect to a backup power supply, and the power switching module is used to connect to a load.

[0016] The control module controls the power switching module based on the voltage information of the first power supply module, so that either the first power supply module or the second power supply module supplies power to the load. The voltage information indicates the first operating state of the first power supply module, which may be a normal state or an abnormal state.

[0017] As can be seen from the working principle of the power supply switching circuit, the power supply switching circuit provided in this application embodiment can detect the first working state of the first power supply module in real time and control the operation of the power supply switching module according to the first working state. When the first power supply module is in a normal state, the control module can control the power switching module to open the path between the first power supply module and the load, so as to give priority to using the first power supply module to supply power to the load; in addition, when the first power supply module is in an abnormal state (such as a voltage drop indicated by the voltage information of the first power supply module due to power failure or other reasons), the control module can immediately control the power switching module to open the path between the second power supply module and the load, and close the path between the first power supply module and the load, so as to seamlessly switch to the second power supply module to supply power to the load. It can be seen that the circuit provided in this application embodiment supplies power to the load through dual power supply switching. Even if one power supply or power supply module fails, the other power supply or power supply module can continue to supply power to the load seamlessly.

[0018] In this way, uninterrupted power can be supplied to the load in the mobile device and / or robot, thereby improving the reliability of power supply and at least partially solving the technical problems mentioned in the background art. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the 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.

[0020] Figure 1 This is a schematic diagram of the structure of the first power supply switching circuit provided in the embodiments of this application; Figure 2 This is a schematic diagram of the structure of the second power supply switching circuit provided in the embodiments of this application; Figure 3 This is a schematic diagram of the third power supply switching circuit provided in the embodiments of this application; Figure 4 This is a schematic diagram of the structure of the fourth power supply switching circuit provided in the embodiments of this application; Figure 5 This is a schematic diagram of the structure of the fifth power supply switching circuit provided in the embodiments of this application; Figure 6 This is a schematic diagram of the sixth power supply switching circuit provided in the embodiments of this application; Figure 7 This is a schematic diagram of the structure of the seventh power supply switching circuit provided in the embodiments of this application. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the specific technical solutions of this application will be further described in detail below with reference to the accompanying drawings of the embodiments of this application. The following embodiments are used to illustrate this application, but are not intended to limit the scope of this application.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0023] In the following description, references are made to “some embodiments,” which describe a subset of all possible embodiments. However, it is understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0024] It should be noted that the terms "first, second, third" used in the embodiments of this application are used to distinguish similar or different objects and do not represent a specific order of objects. It can be understood that "first, second, third" can be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0025] In related technologies, taking robots as an example of electronic devices, technicians typically install a power conversion module inside the robot to convert the voltage output from the battery or external power source according to the needs of various modules within the electronic device. The converted voltage is then output to the respective modules within the electronic device to power the robot.

[0026] However, the related technical solutions have the problem of being unable to provide uninterrupted power to electronic devices. In other words, this solution suffers from poor power supply reliability.

[0027] To address this, this application provides a power supply switching circuit. The circuit comprises a first power supply module, a second power supply module, a power switching module, and a control module. The first power supply module, the second power supply module, and the control module are each connected to the power switching module. The second power supply module is used to connect to a backup power source, and the power switching module is used to connect to a load. The control module controls the power switching module based on the voltage information of the first power supply module, enabling either the first or second power supply module to supply power to the load. The voltage information indicates a first operating state of the first power supply module, which can be either normal or abnormal. This allows for uninterrupted power supply to the load in the mobile device and / or robot, thereby improving power supply reliability.

[0028] This application uses a power switching circuit applied in a mobile device, specifically a robot, as an example for illustration. However, it does not imply that this application's embodiments can only be applied to power switching in mobile devices or robots.

[0029] It is understood that the mobile devices applicable to the electronic control system provided in this application embodiment include service robots, industrial-grade mobile devices, special-operation mobile devices, medical mobile devices, and outdoor portable intelligent devices, which can be selected according to actual conditions. Service robots may include household cleaning robots, commercial cleaning robots, restaurant delivery robots, hotel service robots, etc., without specific limitations. Industrial-grade mobile devices may include warehouse autonomous handling robots, workshop sorting robots, port unmanned transfer vehicles, etc. Special-operation mobile devices may include fire inspection robots, power maintenance robots, mining exploration robots, etc., without specific limitations. Medical mobile devices may include medical delivery robots, portable diagnostic equipment, mobile nursing workstations, etc., without specific limitations. Outdoor portable intelligent devices may include outdoor surveying drone ground stations, mobile monitoring terminals, portable emergency rescue equipment, etc. This application embodiment does not limit these.

[0030] The power supply switching circuit provided in the embodiments of this application will be explained in detail below.

[0031] Figure 1 For a schematic diagram of a power supply switching circuit provided in this application, see [link to schematic diagram]. Figure 1 This application provides a power supply switching circuit 100, which includes a first power supply module 101, a second power supply module 102, a power switching module 103, and a control module 104.

[0032] The first power supply module 101, the second power supply module 102, and the control module 104 are respectively connected to the power switching module 103. The second power supply module 102 is used to connect to the backup power supply, and the power switching module 103 is used to connect to the load.

[0033] It should be noted that the various components in circuit 100 can be connected via positive (+) and negative (-) lines to form a complete current loop. For specific connection details, please refer to [reference needed]. Figure 1 As shown, this embodiment will not be described in detail here.

[0034] The control module 104 is used to control the power switching module 103 according to the voltage information of the first power supply module 101, so that the first power supply module 101 or the second power supply module 102 supplies power to the load.

[0035] In this embodiment, the voltage information is used to indicate the first operating state of the first power supply module 101, which is either a normal state or an abnormal state.

[0036] Optionally, the first power supply module 101 can also be used to input a first operating voltage (such as...). Figure 1As shown in V1, the first operating voltage can be provided by the power battery (generally the main battery) in the mobile device (i.e., the robot). The first power supply module 101 can be a power brick, for example, the first power supply module 101 can be a 1kW power brick connected to the power battery. This application embodiment does not limit this.

[0037] In some possible embodiments, the first power supply module 101 may include a voltage conversion circuit and an energy storage unit, thereby converting the voltage received from the power battery into the operating voltage required by the load, and then outputting it to the load through the power switching module 103. Alternatively, when the voltage output from the power battery is equal to the operating voltage corresponding to the load, the first power supply module 101 may not perform voltage conversion and directly output the voltage from the power battery to the load through the power switching module 103. In other words, the first power supply module 101 may have voltage conversion and / or energy output functions.

[0038] Additionally, the first power supply module 101 may also include an interface for connecting to a power battery. This application embodiment does not limit this aspect.

[0039] Optionally, the second power supply module 102 may include an interface connected to the backup power supply, enabling the backup power supply to input electrical energy to the power switching circuit 100 and the power switching module 103 through the second power supply module 102. The second power supply module 102 may also include a power supply block to achieve voltage conversion when the voltage output by the backup power supply does not meet the requirements of the circuit 100. This application embodiment does not limit this aspect.

[0040] In this embodiment, the battery brick can be a lithium battery energy storage type battery brick, a lead-acid battery energy storage type battery brick, a supercapacitor energy storage type battery brick, a direct-transformer battery brick without energy storage, or a photovoltaic complementary type battery brick, etc. This application does not limit the specific type of battery brick.

[0041] Under normal circumstances, the first power supply module 101 and the second power supply module 102 will not supply power to the load simultaneously. Moreover, when the first power supply module 101 is able to provide operating voltage to the load, the first power supply module 101 can be used first; when the first power supply module 101 is unable to provide operating voltage to the load, the second power supply module 102 can be used. This application embodiment does not limit this.

[0042] Optionally, the payload can be any one or more devices within the mobile device. For example, the payload can be a device within the robot's "brain," such as an Artificial Intelligence Unit (AIU), a Vision and Locomotion Module (VLM), or a Human-Robot Interaction Unit (HRU). The payload can also be motor controllers and motors in the robot's left leg, right leg, left arm, right arm, head, or neck area, as well as cameras, fans, and various sensors (such as temperature sensors and infrared sensors) within the robot—any possible device. This application does not limit the scope of this embodiment.

[0043] In this embodiment, the voltage level of the power battery can generally be greater than or equal to the voltage level of the backup power source. For example, if the backup power source can be a 12V DC battery, then the power battery can be a DC battery with any possible voltage level, such as 60V or 72V. This application does not limit this aspect.

[0044] Optionally, the control module 104 can be any device with functions such as identification, processing, calculation, and control. For example, the control module 104 can be any possible device such as a microcontroller unit (MCU), a central processing unit (CPU), or a digital signal processor (DSP). Moreover, the operating voltage of the control module 104 can be provided by the power battery or the backup power supply. This application embodiment does not limit this.

[0045] In this embodiment, the voltage information of the first power supply module 101 may refer to the voltage level of the electrical energy currently received by the first power supply module 101 from the power battery, and / or the voltage level of the electrical energy that the first power supply module 101 is currently able to output.

[0046] Optionally, since the voltage information of the first power supply module 101 is used to indicate the first operating state of the first power supply module 101, generally, if the voltage level of the electrical energy received by the first power supply module 101 and / or the voltage level of the electrical energy output by the first power supply module 101 is less than a preset threshold, the first operating state can be determined to be an abnormal state; if the voltage level of the electrical energy received by the first power supply module 101 and / or the voltage level of the electrical energy output by the first power supply module 101 is greater than or equal to the preset threshold, the first operating state can be determined to be a normal state.

[0047] Optionally, the power switching module 103 can be a device capable of switching operations under the control of the control module 104. For example, the power switching module 103 may include one or more controllable switches, which can be any possible switching transistor such as a MOSFET, transistor, or IGBT, or an electronic switch such as a relay. This application embodiment does not limit this.

[0048] In one possible implementation, the control module 104 can specifically be used to generate a control signal based on the voltage information of the first power supply module 101, and output the control signal to the power switching module 103. The power switching module 103 can specifically be used to operate under the action of the control signal to connect the first transmission channel between the first power supply module 101 and the load, or to connect the second transmission channel between the second power supply module 102 and the load.

[0049] Furthermore, the first power supply module 101 is used to output first electrical energy to the load when the first transmission channel is turned on, and the second power supply module 102 is used to output second electrical energy to the load when the second transmission channel is turned on.

[0050] In this embodiment, the control module 104 can first determine the first working state based on the voltage information of the first power supply module 101, and then generate a control signal corresponding to the first working state; that is, the control signal can also be used to indicate the first working state.

[0051] In this embodiment, the first transmission channel refers to the power transmission path between the first power supply module 101 and the load. The first transmission channel can be the transmission line between the positive power supply terminal (+) of the first power supply module 101, the power switching module 103, and the positive power supply terminal (+) of the load. Alternatively, it can be the return line between the negative power supply terminal (-) of the load, the power switching module 103, and the negative power supply terminal (-) of the first power supply module 101. This embodiment does not limit the specific implementation.

[0052] In this embodiment, the second transmission channel refers to the power transmission path between the second power supply module 102 and the load. The second transmission channel can be the transmission line between the positive power supply terminal (+) of the second power supply module 102, the power switching module 103, and the positive power supply terminal (+) of the load. Alternatively, it can be the return line between the negative power supply terminal (-) of the load, the power switching module 103, and the negative power supply terminal (-) of the second power supply module 102. This application does not limit the specific implementation in this regard.

[0053] Under normal circumstances, when the first operating state is normal, the control module 104 can control the power switching module 103 (for example, by outputting a corresponding control signal to the power switching module 103) to turn on the first transmission channel and disconnect the second transmission channel. When the first operating state is abnormal, the control module 104 can control the power switching module 103 (for example, by outputting a corresponding control signal to the power switching module 103) to turn on the second transmission channel and disconnect the first transmission channel. In this way, it can be ensured that the first power supply module 101 and the second power supply module 102 will not supply power to the load at the same time.

[0054] Optionally, the voltage level of the first electrical energy is greater than the voltage level of the second electrical energy. This can prevent the power switching module 103 from malfunctioning, which could lead to the first transmission channel and / or the second transmission channel being unable to conduct or close.

[0055] In other words, when the control module 104 determines that the first operating state is normal based on the voltage information of the first power supply module 101, it controls the power switching module 103 to turn on the first transmission channel and turn off the second transmission channel. Furthermore, the control module 104 is also used to control the power switching module 103 to turn on the second transmission channel and turn off the first transmission channel when the first operating state is abnormal based on the voltage information of the first power supply module 101.

[0056] Understandably, this allows the first power supply module 101 to prioritize powering the load when it is in a normal state, and the second power supply module 102 to power the load when it is in an abnormal state. This clearly defines the actions that the power switching module 103 needs to perform under different circumstances, fundamentally avoiding the possibility of two power supply modules simultaneously supplying power to the load. Consequently, this can improve power supply safety to a certain extent.

[0057] In some possible embodiments, the control module 104 may also acquire the voltage information of the second power supply module 102, and control the power switching module 103 based on the voltage information of the first power supply module 101 and the voltage information of the second power supply module 102.

[0058] Optionally, the voltage information of the second power supply module 102 may refer to the voltage level of the electrical energy currently received by the second power supply module 102 from the backup power source, and / or the voltage level of the electrical energy that the second power supply module 102 is currently able to output.

[0059] For example, the control module 104 can specifically generate the control signal based on the voltage information of the first power supply module 101 and the voltage information of the second power supply module 102, and then control the power switching module 103 through the control signal. This embodiment of the application does not limit this. In this case, the control signal can also be used to indicate a second operating state of the second power supply module 102, which can be a normal state or an abnormal state. For example, when the control module 104 determines that the first operating state is an abnormal state based on the voltage information of the first power supply module 101 and determines that the second operating state is a normal state based on the voltage information of the second power supply module 102, it can control the power switching module 103 to turn on the second transmission channel and turn off the first transmission channel.

[0060] For example, when the control module 104 determines that both the first and second operating states are abnormal, it can control the power switching module 103 to shut down both the first and second transmission channels. Simultaneously, the control module 104 can output corresponding prompts to inform the user that power cannot currently be supplied to the load. This allows for timely notification to the user when both the first power supply module 101 and the second power supply module 102 are malfunctioning (including situations where neither the power battery nor the backup power supply can supply power to the load, or where both the first and second power supply modules 101 are faulty), facilitating prompt repair.

[0061] It should be understood that, in order to better explain the circuit 100 provided in the embodiments of this application, the working principle of the circuit 100 will be briefly introduced below: When the mobile device and / or circuit 100 is powered off, all controllable switches in the power switching module 103 are turned off, and both the first transmission channel and the second transmission channel are closed. At this time, neither the first power supply module 101 nor the second power supply module 102 can supply power to the load through the power switching module 103, and no current flows through the circuit 100, so the load does not work.

[0062] When the mobile device and / or circuit 100 is powered on, and the control module 104 determines that the first power supply module 101 (and the second power supply module 102) are in normal condition, the control module 104 controls the power switching module 103 to turn on the first transmission channel and turn off the second transmission channel. At this time, the first power supply module 101 can output the first electrical energy to the load (through the first transmission channel), while the second power supply module 102 does not output electrical energy to the load. Under these circumstances, the load can operate normally.

[0063] When the mobile device and / or circuit 100 is powered on, and the control module 104 determines that the first power supply module 101 is in an abnormal state and the second power supply module 102 is in a normal state, the control module 104 controls the power switching module 103 to turn on the second transmission channel and turn off the first transmission channel. At this time, the second power supply module 102 can output the second electrical energy to the load (through the second transmission channel), while the first power supply module 101 does not output electrical energy to the load. Under these circumstances, the load can also work normally.

[0064] When the mobile device and / or circuit 100 is powered on, and the control module 104 determines that both the first power supply module 101 and the second power supply module 102 are in an abnormal state, the control module 104 controls the power switching module 103 to shut down both the second transmission channel and the first transmission channel. At this time, neither the second power supply module 102 nor the first power supply module 101 outputs power to the load. In this situation, the load does not operate, and the control module 104 can output corresponding prompt information.

[0065] It is worth noting that circuit 100 includes a first power supply module 101, a second power supply module 102, a power switching module 103, and a control module 104. The control module 104 can control the power switching module 103 to operate according to the first operating state of the first power supply module 101, allowing either the first power supply module 101 or the second power supply module 102 to supply power to the load via the power switching module 103. In other words, this solution allows the first power supply module 101 to supply power to the load via the power switching module 103 (and the first transmission channel) when the first power supply module 101 is in a normal state; and it also allows the second power supply module 102 to supply power to the load via the power switching module 103 (and the second transmission channel) when the first power supply module 101 is in an abnormal state. Thus, circuit 100 can achieve uninterrupted power supply to the load in the mobile device and / or robot, improving power supply reliability.

[0066] In this embodiment of the application, a first power supply module 101, a second power supply module 102, a power switching module 103, and a control module 104 are provided in the power supply switching circuit 100. The first power supply module 101, the second power supply module 102, and the control module 104 are respectively connected to the power switching module 103. The second power supply module 102 is used to connect to the backup power supply, and the power switching module 103 is used to connect to the load.

[0067] The control module 104 controls the power switching module 103 based on the voltage information of the first power supply module 101, so that either the first power supply module 101 or the second power supply module 102 supplies power to the load. The voltage information indicates a first operating state of the first power supply module 101, which is either a normal state or an abnormal state.

[0068] As can be seen from the above working principle, the power switching circuit 100 provided in this application embodiment can detect the first working state of the first power supply module 101 in real time and control the operation of the power switching module 103 according to the first working state. When the first power supply module 101 is in a normal state, the control module 104 can control the power switching module 103 to open the path (i.e., the first transmission channel) between the first power supply module 101 and the load, so as to give priority to using the first power supply module 101 to supply power to the load; in addition, when the first power supply module 101 is in an abnormal state (due to the power battery losing power or other reasons causing the voltage information of the first power supply module 101 to drop, etc.), the control module 104 can immediately control the power switching module 103 to open the path (i.e., the second transmission channel) between the second power supply module 102 and the load, and close the path (i.e., the first transmission channel) between the first power supply module 101 and the load, so as to seamlessly switch to the second power supply module 102 to supply power to the load. As can be seen, the circuit 100 provided in this application embodiment supplies power to the load through dual power supply switching. Even if one power supply or power supply module fails, the other power supply or power supply module can continue to supply power to the load seamlessly.

[0069] In this way, the load in the mobile device and / or robot can be supplied with uninterrupted power, thereby improving the reliability of power supply.

[0070] In one possible implementation, see [link to relevant documentation]. Figure 2 The power switching module 103 includes: a first switching unit 1031 and a second switching unit 1032.

[0071] The first end of the first switching unit 1031 is connected to the positive power supply terminal (+) of the first power supply module 101, the second end of the first switching unit 1031 is connected to the positive power supply terminal (+) of the load, the third end of the first switching unit 1031 is connected to the first output terminal of the control module 104, and the fourth end of the first switching unit 1031 is connected to the first end of the second switching unit 1032.

[0072] The second end of the second switching unit 1032 is connected to the positive power supply terminal of the second power supply module 102, and the third end of the second switching unit 1032 is connected to the second output terminal of the control module 104.

[0073] Additionally, the negative power supply terminal (-) of the first power supply module 101 can also be connected to the negative power supply terminal (-) of the load via the negative power supply terminal (-) of the power switching module 103; similarly, the negative power supply terminal (-) of the second power supply module 102 can also be connected to the negative power supply terminal (-) of the load via the negative power supply terminal (-) of the power switching module 103. See details in [link to documentation]. Figure 2 As shown, the embodiments in this application do not limit this.

[0074] The first switching unit 1031 is used to turn on when the first working state is normal, so as to turn on the first transmission channel, and to turn off when the first working state is abnormal, so as to turn off the first transmission channel.

[0075] The second switching unit 1032 is used to shut down the second transmission channel when the first working state is in a normal state, and to turn on the second transmission channel when the first working state is in an abnormal state.

[0076] Optionally, the first switching unit 1031 may include at least one controllable switch, and the second switching unit 1032 may also include at least one controllable switch.

[0077] In this embodiment, both the first switching unit 1031 and the second switching unit 1032 are controlled by the control module 104.

[0078] It is understandable that when the mobile device and / or circuit 100 is in a powered-off state (or when the mobile device and / or circuit 100 is powered on and the control module 104 determines that both the first power supply module 101 and the second power supply module 102 are in an abnormal state), both the first switching unit 1031 and the second switching unit 1032 are turned off. At this time, no current flows through the circuit 100, and the load does not work.

[0079] When the mobile device and / or circuit 100 is powered on, and the control module 104 determines that the first power supply module 101 (and the second power supply module 102) are in normal condition, the control module 104 controls the first switching unit 1031 to turn on, and simultaneously controls the second switching unit 1032 to turn off. At this time, the first power supply module 101 can output the first electrical energy to the load through the first switching unit 1031 (i.e., the first transmission channel), while the second power supply module 102 does not output electrical energy to the load. Under these conditions, the load can operate normally.

[0080] When the mobile device and / or circuit 100 is powered on, and the control module 104 determines that the first power supply module 101 is in an abnormal state and the second power supply module 102 is in a normal state, the control module 104 controls the first switching unit 1031 to turn off, and simultaneously controls the second switching unit 1032 to turn on. At this time, the second power supply module 102 can output the second electrical energy to the load through the second switching unit 1032 (i.e., the second transmission channel), while the first power supply module 101 does not output electrical energy to the load. Under these circumstances, the load can operate normally.

[0081] As can be seen, this embodiment achieves physical isolation between the first transmission channel corresponding to the first power supply module 101 and the second transmission channel corresponding to the second power supply module 102 by setting up the first switching unit 1031 and the second switching unit 1032 separately and independently controlled by the control module 104, so as to avoid the risk of short circuit and circulating current by isolating the dual power supply.

[0082] In one possible implementation, Figure 2 Based on this, continue to see Figure 3 The first switching unit 1031 includes a first switching transistor Q1 and a second switching transistor Q2.

[0083] The source of the first switching transistor Q1 is connected to the positive power supply terminal of the first power supply module 101, the drain of the first switching transistor Q1 is connected to the drain of the second switching transistor Q2, and the source of the second switching transistor Q2 is connected to the positive power supply terminal of the load and the first terminal of the second switching unit 1032.

[0084] The gates of the first switch Q1 and the second switch Q2 are respectively connected to the output terminal of the control module 104.

[0085] The first switch Q1 and the second switch Q2 are turned on when the first operating state is normal, and turned off when the first operating state is abnormal.

[0086] Optionally, the first switch Q1 and the second switch Q2 can be P-channel switches, such as PMOS or P-channel IGBT; or they can be PNP transistors. This application does not limit the specific type of switch.

[0087] It is understandable that the gates of the first switch Q1 and the second switch Q2 can be connected to different output terminals of the control module 104, thus enabling the control module 104 to control the first switch Q1 and the second switch Q2 separately. Furthermore, by Figure 3As can be seen from the connection relationship described above, the first switch Q1 and the second switch Q2 are connected back to back. That is to say, the body diodes of the first switch Q1 and the second switch Q2 are connected in reverse series. This can prevent reverse current from flowing into the first power supply module 101 and the power battery, thus realizing the function of preventing reverse current and improving the safety of the circuit 100.

[0088] Additionally, see also Figure 3 The second switching unit 1032 includes a third switch Q3 and a fourth switch Q4.

[0089] The source of the third switch Q3 is connected to the positive power supply terminal of the second power supply module 102, the drain of the third switch Q3 is connected to the drain of the fourth switch Q4, and the source of the fourth switch Q4 is connected to the source of the second switch Q2.

[0090] The gates of the third switch Q3 and the fourth switch Q4 are respectively connected to the second output terminal of the control module 104.

[0091] Specifically, the third switch Q3 is turned on when the first operating state is in a normal or abnormal state, and the fourth switch Q4 is turned off when the first operating state is in a normal state and turned on when the first operating state is in an abnormal state.

[0092] Optionally, the voltage level of the first electrical energy is greater than the voltage level of the second electrical energy.

[0093] Optionally, the third switch Q3 and the fourth switch Q4 can be P-channel switches, such as PMOS or P-channel IGBTs; or they can be PNP transistors. This application does not limit the specific type of switch.

[0094] It is understandable that the gates of the third switch Q3 and the fourth switch Q4 can be connected to different output terminals on the control module 104, thus enabling the control module 104 to control the third switch Q3 and the fourth switch Q4 separately. Furthermore, by Figure 3 As can be seen from the connection relationship described above, the third switch Q3 and the fourth switch Q4 are also connected back to back. That is to say, the body diodes of the third switch Q3 and the fourth switch Q4 are also connected in reverse series. In this way, reverse current can be prevented from flowing into the second power supply module 102 and the backup power supply, which can realize the function of anti-reverse current and improve the safety of circuit 100.

[0095] Furthermore, the number of output terminals of the control module 104 can be adjusted according to actual needs. For example, in this embodiment, there are 4 switching transistors that need to be controlled, so the control module 104 can have at least 4 output terminals to independently control each switching transistor.

[0096] It is worth noting that the third switch Q3 in the second switching unit 1032 is normally on after the circuit 100 is powered on, and the fourth switch Q4 is controlled by the control module 104 according to the first operating state. Therefore, when the first power supply module 101 is in normal operation, the fourth switch Q4 is off. Furthermore, because the voltage level of the first power supply module 101 can output is higher than the voltage level of the second power supply module 102 can output, the source voltage (connected to the backup power supply) of the third switch Q3 is lower than its drain voltage (load point). Therefore, the third switch Q3 cannot generate an effective current from the backup power supply to the load, and the backup power supply is automatically silenced. This simplifies the control logic of the control module 104 and ensures that the first power supply module 101 can supply power preferentially through the characteristics of the hardware circuit itself, physically avoiding the possibility of the first power supply module 101 and the second power supply module 102 simultaneously supplying power to the load.

[0097] It is understandable that when the mobile device and / or circuit 100 is in a powered-off state (or when the mobile device and / or circuit 100 is powered on and the control module 104 determines that both the first power supply module 101 and the second power supply module 102 are in an abnormal state), the first switch Q, the second switch Q2, the third switch Q3 and the fourth switch Q4 are all turned off. At this time, no current flows through the circuit 100 and the load does not work.

[0098] When the mobile device and / or circuit 100 is powered on, and the control module 104 determines that the first power supply module 101 (and the second power supply module 102) are in normal condition, the control module 104 controls the first switch Q1, the second switch Q2, and the third switch Q3 to conduct (the control module 104 can output control signals to the first switch Q1, the second switch Q2, the third switch Q3, and the fourth switch Q4 respectively to control their conduction), and simultaneously controls the fourth switch Q4 to turn off. This allows the first transmission channel to conduct and the second transmission channel to turn off. At this time, the first power supply module 101 can output the first electrical energy to the load through the first switch Q1 and the second switch Q2 (i.e., the first transmission channel), while the second power supply module 102 does not output electrical energy to the load. Under these conditions, the load can operate normally.

[0099] When the mobile device and / or circuit 100 is powered on, and the control module 104 determines that the first power supply module 101 is in an abnormal state and the second power supply module 102 is in a normal state, it controls the first switch Q1 and the second switch Q2 to turn off, while simultaneously controlling the third switch Q3 and the fourth switch Q4 to turn on. This allows the second transmission channel to be turned on and the first transmission channel to be turned off. At this time, the second power supply module 102 can output the second electrical energy to the load through the third switch Q3 and the fourth switch Q4 (i.e., the second transmission channel), while the first power supply module 101 does not output electrical energy to the load. Under these conditions, the load can operate normally.

[0100] This allows for uninterrupted power supply to the load in the mobile device and / or robot, thereby improving power supply reliability.

[0101] In one possible implementation, see [link to relevant documentation]. Figure 4 The power supply switching circuit 100 also includes a third power supply module 105.

[0102] The third power supply module 105 is connected to the second power supply module 102 and the power switching module 103 respectively, and the third power supply module 105 is used to input the first working voltage.

[0103] The third power supply module 105 is used to output charging power to the second power supply module 102 when the second power supply module 102 is not outputting the second power and the backup power supply is not fully charged.

[0104] Optionally, the third power supply module 105 can also be a power brick, and the voltage level of the output voltage of the third power supply module 105 is generally lower than the voltage level of the output voltage of the first power supply module 101. For example, the third power supply module 105 can be a 40W power brick connected to the power battery. This application embodiment does not limit this.

[0105] Optionally, the backup power supply being in a non-fully charged state means that the state of charge (SOC) of the backup power supply battery is not 100% (or is lower than other possible preset values). When the backup power supply is in a non-fully charged state, it can be charged by the third power supply module 105.

[0106] Optionally, the charging energy can refer to the electrical energy required by the backup power supply during charging. Generally, during the charging process of the backup power supply by the third power supply module 105 through the second power supply module 102, handshake communication can be performed based on a corresponding handshake protocol to determine parameters such as voltage and current of the charging energy according to the backup power supply's specifications and current SOC. Furthermore, the backup power supply can also be charged using a three-stage charging method: constant voltage charging, constant current charging, and trickle charging. This application embodiment does not limit this approach.

[0107] In some possible embodiments, the third power supply module 105 may include a voltage conversion circuit and an energy storage unit, thereby converting the voltage received from the power battery into the charging energy required by the backup power supply, and then outputting it to the backup power supply through the second power supply module 102. That is, the first power supply module 101 may have voltage conversion and / or energy output functions. Moreover, in order to ensure that the third power supply module 105 can charge the backup power supply, the voltage level of the energy output by the third power supply module 105 is generally higher than the voltage level of the energy output by the second power supply module 102 (or the second energy output by the backup power supply).

[0108] Additionally, the third power supply module 105 may also include an interface for connecting to the backup power supply. This application embodiment does not limit this aspect.

[0109] In another possible embodiment, the third power supply module 105 can also be used to supply power to the load through the power switching module 103 when the power battery is normal but the first power supply module 101 itself fails (and the second power supply module 102 or the backup power supply fails).

[0110] In another possible embodiment, when the mobile device is in stanby mode, the first power supply module 101 does not supply power to the load, and the load is typically supplied by the second power supply module 102. To minimize the number of charge and discharge cycles of the second power supply module 102, a third power supply module 105 can be used to supply power to the load through the second switching unit 1032 and / or the second transmission channel. Because the voltage of the third power supply module 105 is greater than the voltage of the second power output from the second power supply module 102, the possibility of the second power supply module 102 discharging can be physically avoided, while simultaneously charging the second power supply module 102.

[0111] As can be seen from the above, by setting up the third power supply module 105, not only can the backup battery be flexibly replenished, thus improving operational reliability, but it can also reduce the number of charge and discharge cycles of the backup power supply to a certain extent, thereby extending the service life of the backup power supply.

[0112] In one possible implementation, see [link to previous section] Figure 4 The power supply switching circuit 100 may also include a protection unit FU.

[0113] Optionally, the protection unit FU can be a fuse, which can be a resettable fuse or a one-time fuse. This application does not limit this aspect.

[0114] This enables overcurrent protection, thereby improving the safety of circuit 100.

[0115] In one possible implementation, see [link to relevant documentation]. Figure 5 The power supply switching circuit 100 also includes a voltage conversion module 106.

[0116] The first terminal of the voltage conversion module 106 is used to input a second operating voltage (such as...) Figure 5 As shown in the figure (V0), the second terminal of the voltage conversion module 106 is connected to the power switching module 103, and the third terminal of the voltage conversion module 106 is connected to the power supply terminal of the control module 104.

[0117] The second power supply module 102 is used to input voltage to the voltage conversion module 106 through the power switching module 103 when the voltage conversion module 106 does not receive the second working voltage.

[0118] The voltage conversion module 106 is used to convert the voltage input by the second working voltage or the power switching module 103 into the target voltage required by the control module 104 when it receives the voltage input by the second working voltage or the power switching module 103, and output the target voltage to the control module 104.

[0119] Optionally, the second operating voltage can also be provided by the power battery in the mobile device. For example, the second operating voltage can be a 60V DC voltage. This application embodiment does not limit this.

[0120] Optionally, if the voltage conversion module 106 does not receive the second operating voltage, it indicates that the power battery may be faulty, or that the circuit between the power battery and the voltage conversion module 106 may be faulty. However, the control module 104 requires a certain operating voltage to power on, so the second power supply module 102 can input voltage to the voltage conversion module 106 through the power switching module 103, thereby powering the control module 104.

[0121] Specifically, from Figure 5As can be seen, the second terminal of the voltage conversion module 106 can be connected between the drain of the third switch Q3 and the drain of the fourth switch Q4. Since the third switch Q3 is normally on, regardless of whether the second power supply module 102 or the third power supply module 105 supplies power to the load through the second transmission channel, the electrical energy output by the second power supply module 102 or the third power supply module 105 can flow to the second terminal of the voltage conversion module 106 through the third switch Q3. In this way, it can be ensured that even when the voltage conversion module 106 does not receive the second operating voltage, the second power supply module 102 or the third power supply module 105 can provide the target voltage to the control module 104 at any time and seamlessly.

[0122] Optionally, the target voltage can be the voltage required for the control module 104 to operate normally, such as 3.3V, 5V, or any other possible voltage level. This application embodiment does not limit this.

[0123] It is worth noting that by setting the voltage conversion module 106 to supply power to the control module 104 based on the second operating voltage provided by the power battery or the voltage output by the second power supply module 102, even if the power battery fails, the control module 104 can continue to be supplied with power seamlessly by the second power supply module 102 (backup power supply). This improves the reliability of the power supply.

[0124] Furthermore, the second terminal of the voltage conversion module 106 is connected to the power switching module 103, rather than directly to the backup power supply. This allows a portion of the second transmission channel supplying power to the load to be reused as a backup power supply channel for the control module 104. When the power battery fails, the second transmission channel already established for the load can simultaneously (or via a simple branch) supply power to the voltage conversion module 106. This avoids the need for the control module 104 to have a separate, complete backup power supply unit, simplifying the system architecture, reducing the number of components, and lowering cost and circuit complexity.

[0125] In one possible implementation, see [link to relevant documentation]. Figure 6 The voltage conversion module 106 also includes: a first conversion unit 1061, a second conversion unit 1062, a first diode D1, and a second diode D2.

[0126] The first terminal of the first conversion unit 1061 is used to input the second working voltage. The second terminal of the first conversion unit 1061 is connected to the positive terminal of the first diode D1. The negative terminal of the first diode D1 is connected to the negative terminal of the second diode D2 and the first terminal of the second conversion unit 1062. The positive terminal of the second diode D2 is connected to the power switching module 103. The second terminal of the second conversion unit 1062 is connected to the power supply terminal of the control module 104.

[0127] The first conversion unit 1061 is used to step down the second working voltage and output the stepped-down voltage to the second conversion unit 1062 through the first diode D1.

[0128] The second conversion unit 1062 is used to convert the stepped-down voltage or the voltage input to the second power supply module 102 through the power switching module 103 into the target voltage, and output the target voltage to the control module 104.

[0129] Optionally, the first conversion unit 1061 may be a DC-DC converter, and the second conversion unit 1062 may be a low dropout linear regulator (LDO) or multiple LDOs connected in series.

[0130] For example, assuming the second operating voltage is 60V output from the power battery, the voltage of the backup power supply or the voltage of the second electrical energy output from the second power supply module 102 is 12V, and the target voltage is 3.3V, then the first conversion unit 1061 can convert the 60V voltage to 14V and output the 14V voltage to the second conversion unit 1062. If the second conversion unit 1062 has only one LDO, then this LDO can directly convert the 12V voltage to 3.3V and output it to the control module 104; if the second conversion unit 1062 includes two LDOs, then the first LDO can convert the 12V voltage to 5V, and then the second LDO can convert the 5V voltage to 3.3V and output it to the control module 104. This application embodiment does not limit this.

[0131] In this embodiment, since the first diode D1 and the second diode D2 have unidirectional conduction characteristics, they can act as anti-backflow components to prevent the stepped-down voltage output from the first conversion unit 1061 from flowing into the second power supply module 102, and also to prevent the second power output from the second power supply module 102 from flowing into the first conversion unit 1061. This improves the safety of the circuit 100.

[0132] Because the voltage converted by the first conversion unit 1061 is greater than the voltage of the second power supply module 102, the power battery can be used to power the control module 104 first.

[0133] It is understandable that the two-stage voltage conversion through the first conversion unit 1061 and the second conversion unit 1062 can reduce the power consumption and loss during voltage conversion, thereby improving the overall energy efficiency.

[0134] In one possible implementation, see [link to previous section] Figure 4 or Figure 6 The power supply switching circuit 100 may also include a detection resistor R0.

[0135] Optionally, the sensing resistor R0 can be any possible resistor, and the specific resistance value can be selected according to actual needs. This application does not limit this.

[0136] It is understood that the sensing resistor R0 is set at the positive power supply terminal (+) of the first power supply module 101, and can be used as a sampling resistor to detect the parameters of the first electrical energy output by the first power supply module 101, such as current and voltage, thereby facilitating subsequent overcurrent protection and overvoltage protection operations of the power supply switching circuit 100. Furthermore, the first operating state corresponding to the first power supply module 101 can also be determined by the sensing resistor R0. This application embodiment does not limit this aspect.

[0137] In one possible implementation, see [link to relevant documentation]. Figure 7 The power supply switching circuit 100 may also include a detection unit 107.

[0138] The first end of the detection unit 107 is connected to the first power supply module 101, the second end of the detection unit 107 is connected to the second power supply module 102, and the third end of the detection unit 107 is connected to the control module 104.

[0139] Optionally, the detection unit 107 may be used to detect the voltage information of the first power supply module 101 and / or the voltage information of the second power supply module 102.

[0140] Optionally, the detection unit 107 can detect the voltage information of the first power supply module 101 and / or the voltage information of the second power supply module 102 in any possible way, such as by directly detecting with corresponding probes or by performing corresponding calculations based on Ohm's law. This application embodiment does not limit this.

[0141] Furthermore, the detected voltage information of the first power supply module 101 and / or the voltage information of the second power supply module 102 can be sent to the control module 104, so that the control module 104 can determine the first operating state of the first power supply module 101 and / or the second operating state of the second power supply module 102, thereby accurately controlling the power switching module 103 and its components. This application embodiment does not limit this aspect.

[0142] The following describes the power supply system including the pre-charge and discharge circuit provided in this application. The specific implementation process and technical effects are described above and will not be repeated below.

[0143] Based on the foregoing embodiments, this application provides a power supply system, including at least the power supply switching circuit 100 provided in any of the above embodiments, a main power supply for providing operating voltage to the first power supply module 101, and a backup power supply for providing operating voltage to the second power supply module 102.

[0144] Optionally, the main power source is the power battery in the above embodiments.

[0145] In addition, the power supply system may include any other possible devices to realize any other functions related to power supply, and the embodiments of this application do not limit this.

[0146] This application provides a mobile device, which includes at least: a load, a main power supply for providing operating voltage to a first power supply module, a backup power supply for providing operating voltage to a second power supply module, and a power supply switching circuit 100 provided in any of the above embodiments.

[0147] Alternatively, the mobile device may include at least: a load and a power supply system provided in the above embodiments.

[0148] It is understood that the power supply system and the mobile device include the power switching circuit 100 provided in the foregoing embodiments. The power supply system, the mobile device, and the power switching circuit 100 belong to the same inventive concept, and their implementation principles and technical effects are similar. For technical details not disclosed in the product-side embodiments of this application, please refer to the description of the circuit-side embodiments of this application for understanding. The embodiments of this application will not be repeated here.

[0149] Those skilled in the art will understand that Figure 1-7 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0150] It should be understood that the phrases "one embodiment," "an embodiment," or "some embodiments" mentioned throughout the specification mean that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment," "in one embodiment," or "in some embodiments" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of this application, the sequence numbers of the above-described processes do not imply a sequential order of execution; the execution order 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 this application. The sequence numbers of the above-described embodiments are merely for descriptive purposes and do not represent the superiority or inferiority of the embodiments. The descriptions of the various embodiments above tend to emphasize the differences between the various embodiments; their similarities or commonalities can be referred to mutually, and for the sake of brevity, they will not be repeated here.

[0151] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three kinds of relationships. For example, object A and / or object B can represent three situations: object A exists alone, object A and object B exist simultaneously, and object B exists alone.

[0152] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0153] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The embodiments described above are merely illustrative. For example, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple modules or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or modules can be electrical, mechanical, or other forms.

[0154] The features disclosed in the several circuit or product embodiments provided in this application can be arbitrarily combined without conflict to obtain new circuit or product embodiments.

[0155] The above description is merely an embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0156] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. 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 power supply switching circuit, characterized in that, The power supply switching circuit includes: a first power supply module, a second power supply module, a power switching module, and a control module; The first power supply module, the second power supply module, and the control module are respectively connected to the power switching module. The second power supply module is used to connect to the backup power supply, and the power switching module is used to connect to the load. The control module is used to control the power switching module according to the voltage information of the first power supply module, so that the first power supply module or the second power supply module supplies power to the load. The voltage information is used to indicate the first operating state of the first power supply module, which is either a normal state or an abnormal state.

2. The power supply switching circuit as described in claim 1, characterized in that, The control module is used to control the power switching module to turn on the first transmission channel between the first power supply module and the load and turn off the second transmission channel between the second power supply module and the load when the first working state is determined to be normal based on the voltage information of the first power supply module. The control module is also used to control the power switching module to turn on the second transmission channel and turn off the first transmission channel when the first working state is determined to be abnormal based on the voltage information of the first power supply module.

3. The power supply switching circuit as described in claim 2, characterized in that, The power switching module includes: a first switching unit and a second switching unit; The first end of the first switching unit is connected to the positive power supply terminal of the first power supply module, the second end of the first switching unit is connected to the positive power supply terminal of the load, the third end of the first switching unit is connected to the first output terminal of the control module, and the fourth end of the first switching unit is connected to the first end of the second switching unit. The second end of the second switching unit is connected to the positive power supply terminal of the second power supply module, and the third end of the second switching unit is connected to the second output terminal of the control module. The first switching unit is used to turn on when the first working state is normal, so as to turn on the first transmission channel, and to turn off when the first working state is abnormal, so as to turn off the first transmission channel. The second switching unit is used to turn off the second transmission channel when the first working state is in a normal state, and to turn on the second transmission channel when the first working state is in an abnormal state.

4. The power supply switching circuit as described in claim 3, characterized in that, The first switching unit includes a first switching transistor and a second switching transistor; The source of the first switching transistor is connected to the positive power supply terminal of the first power supply module, the drain of the first switching transistor is connected to the drain of the second switching transistor, and the source of the second switching transistor is connected to the positive power supply terminal of the load and the first terminal of the second switching unit, respectively. The gates of the first switching transistor and the second switching transistor are respectively connected to the output terminal of the control module; The first switch and the second switch are turned on when the first operating state is normal, and turned off when the first operating state is abnormal.

5. The power supply switching circuit as described in claim 4, characterized in that, The second switching unit includes a third switch and a fourth switch; The source of the third switch is connected to the positive power supply terminal of the second power supply module, the drain of the third switch is connected to the drain of the fourth switch, and the source of the fourth switch is connected to the source of the second switch. The gates of the third and fourth switching transistors are respectively connected to the second output terminal of the control module. The third switch is turned on when the first operating state is in a normal or abnormal state, and the fourth switch is turned off when the first operating state is in a normal state and turned on when the first operating state is in an abnormal state; the voltage level of the first power supply module outputting the first electrical energy to the load through the first transmission channel is greater than the voltage level of the second electrical energy output by the second power supply module to the load through the second transmission channel.

6. The power supply switching circuit as described in any one of claims 1-5, characterized in that, The power supply switching circuit also includes a voltage conversion module; The first terminal of the voltage conversion module is used to input the second working voltage, the second terminal of the voltage conversion module is connected to the power switching module, and the third terminal of the voltage conversion module is connected to the power supply terminal of the control module. The second power supply module is used to input voltage to the voltage conversion module through the power switching module when the voltage conversion module does not receive the second operating voltage. The voltage conversion module is used to convert the second operating voltage or the voltage input by the power switching module into the target voltage required by the control module when it receives the second operating voltage or the voltage input by the power switching module, and output the target voltage to the control module.

7. The power supply switching circuit as described in claim 6, characterized in that, The voltage conversion module further includes: a first conversion unit, a second conversion unit, a first diode, and a second diode; The first terminal of the first conversion unit is used to input the second working voltage, the second terminal of the first conversion unit is connected to the positive terminal of the first diode, the negative terminal of the first diode is connected to the negative terminal of the second diode and the first terminal of the second conversion unit, the positive terminal of the second diode is connected to the power switching module, and the second terminal of the second conversion unit is connected to the power supply terminal of the control module. The first conversion unit is used to step down the second operating voltage and output the stepped-down voltage to the second conversion unit through the first diode; The second conversion unit is used to convert the stepped-down voltage or the voltage input by the second power supply module through the power switching module into the target voltage, and output the target voltage to the control module.

8. The power supply switching circuit as described in any one of claims 1-5, characterized in that, The power supply switching circuit also includes a third power supply module; The third power supply module is connected to the second power supply module and the power switching module respectively, and the third power supply module is used to input the first working voltage; The third power supply module is used to output charging power to the second power supply module when the second power supply module is not outputting the second power energy and the backup power supply is not fully charged.

9. A power supply system, characterized in that, At least including: The power supply switching circuit according to any one of claims 1 to 8, the main power supply for providing operating voltage to the first power supply module, and the backup power supply for providing operating voltage to the second power supply module.

10. A mobile device, characterized in that, At least including: The load, the main power supply for providing the operating voltage to the first power supply module, the backup power supply for providing the operating voltage to the second power supply module, and the power supply switching circuit according to any one of claims 1 to 8; Alternatively, it may include at least: a load and the power supply system as described in claim 9.

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