Power supply circuit and power supply device applied to Internet of Things equipment, and Internet of Things equipment

Abstract

The utility model belongs to the technical field of Internet of Things equipment, and provides a power supply circuit and a power supply device applied to the Internet of Things equipment, an energy storage battery is connected to a load power supply end through a switch module, and the connection state between the energy storage battery and the load power supply end can be controlled by controlling the on-off state of the switch module, the switch control module and the key switch module can form two control paths to control the on-off state of the switch module, so that the switch module is flexibly controlled by a main control circuit and user operation, and the power supply control of the energy storage battery on the power supply end of the load is realized by multiple ways; and the signal sampling module detects the on-off state of the key switch module in real time and feeds back the on-off state to the main control circuit, so that various power supply management that a user can actively carry out power supply control on the load power supply end and the main control circuit can also carry out power supply control on the load power supply end is realized, and the use experience of the Internet of Things equipment is improved.

Description

Technical Field

[0001] This application belongs to the field of Internet of Things (IoT) technology, and in particular relates to a power supply circuit and power supply device for use in IoT devices. Background Technology

[0002] Currently, with the rise of the Internet of Things (IoT), all kinds of IoT devices are flooding the market, and these devices are usually powered by batteries.

[0003] Due to size limitations, battery capacity is limited in IoT devices. Designing a power supply circuit compatible with various power strategies for IoT devices has become an important direction for R&D personnel. Utility Model Content

[0004] The purpose of this application is to provide a power supply circuit and power supply device for Internet of Things (IoT) devices, aiming to provide IoT devices with a power supply circuit compatible with various power strategies.

[0005] The first aspect of this application provides a power supply circuit for an Internet of Things (IoT) device, the IoT device further including a main control circuit, the power supply circuit including: an energy storage battery, a switch module, a switch drive module, a switch control module, a signal sampling module, and a push-button switch module;

[0006] The energy storage battery is connected to the load power supply terminal via the switching module;

[0007] The switch control module is connected to the control signal terminal of the main control circuit. The switch control module is used to generate a switch control signal based on the power control signal provided by the main control circuit and output it to the switch drive module.

[0008] The switch driving module is connected to the switch control module. The switch driving module is used to generate a corresponding switch driving signal according to the switch control signal and output it to the switch module to control the switching state of the switch module.

[0009] The button switch module is connected to the switch driver module, and the button switch module is used to control the switch driver module to generate corresponding switch drive signals according to the user's button operation.

[0010] The signal sampling module is connected to the switch driving module and is used to sample the signal of the switch driving module and generate a signal sampling signal to be output to the signal sampling terminal of the main control circuit.

[0011] In the technical solution of this application embodiment, the energy storage battery is connected to the load power supply terminal via the switch module. The connection state between the energy storage battery and the load power supply terminal can be controlled by controlling the switching state of the switch module. The switch control module and the push-button switch module can form two control paths to control the switching state of the switch module, achieving flexible control of the switch module. The main control circuit can send corresponding power control signals to the switch control module, which then generates a switch control signal based on the power control signal and outputs it to the switch drive module to control the switch drive module to turn on the switch module, enabling the energy storage battery to supply power to the load power supply terminal. On the other hand, the push-button switch module can be controlled by the user's button press, directly controlling the switch drive module to turn on the switch module, enabling the energy storage battery to supply power to the load power supply terminal. Furthermore, the signal sampling module detects the switching state of the push-button switch module in real time and feeds it back to the main control circuit. This achieves multiple power management options, allowing users to actively control the power supply to the load power supply terminal, or the main control circuit to control the power supply to the load power supply terminal, thus improving the user experience of IoT devices.

[0012] In some embodiments, the switching module includes: a first switching transistor and a second switching transistor;

[0013] The first and second switching transistors are connected in series back to back to form a bidirectional switching circuit, and the gates of the first and second switching transistors are connected to the switch driving module.

[0014] In the technical solution of this application embodiment, the first and second switching transistors are connected back-to-back in series to form a bidirectional switching circuit. Because the first and second switching transistors are connected back-to-back, bidirectional current flow control between the energy storage battery and the load power supply terminal can be achieved. This allows for simultaneous charging of the energy storage battery and supply of power to the load connected to the load power supply terminal when the load power supply terminal is connected to an external power source. The source or drain of the first and second switching transistors is connected together, and their gates are also connected together. When both the first and second switching transistors are turned on, if the voltage of the energy storage battery is greater than that of the load power supply terminal, the energy storage battery outputs current to the load power supply terminal through the switching module. If the voltage of the energy storage battery is less than that of the load power supply terminal, the load power supply terminal can charge the energy storage battery through the switching module. In this way, the current transmission direction of the switching module can be flexibly controlled by the voltage of the load power supply terminal and the energy storage battery. The external power supply terminal can be connected to a charger, which can directly supply power to the load power supply terminal or charge the energy storage battery through the switching module. The bidirectional switching circuit has bidirectional (forward and reverse) switching control of the power supply, and the bidirectional switching circuit has low on-resistance to reduce power consumption, thereby improving the load regulation function. It has sufficient high voltage and high temperature operating capability, can withstand the use of high temperature environment and high voltage scenario, and has low quiescent current, which can extend battery life.

[0015] In some embodiments, the source of the first switching transistor is connected to the source of the second switching transistor, the drain of the first switching transistor is connected to the positive terminal of the energy storage battery, and the drain of the second switching transistor is connected to the load power supply terminal.

[0016] The gates of the first switch and the second switch are connected to the switch driving module.

[0017] In the technical solution of this application embodiment, the drain of the first switching transistor is connected to the positive terminal of the energy storage battery, and the drain of the second switching transistor is connected to the load power supply terminal. When the switching drive signal output by the switching drive module is low, the first and second switching transistors can be controlled to conduct simultaneously, realizing bidirectional current flow control between the energy storage battery and the load power supply terminal. This allows the energy storage battery to be charged and the load connected to the load power supply terminal to be powered simultaneously when the load power supply terminal is connected to an external power source. The sources of the first and second switching transistors are connected together, and the gates of the first and second switching transistors are connected together. When both the first and second switching transistors are conducting, if the voltage of the energy storage battery is greater than that of the load power supply terminal, the energy storage battery outputs current through the first switching transistor and outputs current to the load power supply terminal through the body diode of the second switching transistor. If the voltage of the energy storage battery is less than that of the load power supply terminal, the load power supply terminal can output current through the second switching transistor and charge the energy storage battery through the body diode of the first switching transistor. In this way, the current transmission direction of the switching module can be flexibly controlled by the voltage of the load power supply terminal and the energy storage battery. The external power supply terminal can be connected to a charger, which can directly supply power to the load power supply terminal or charge the energy storage battery through the switching module. The bidirectional switching circuit has bidirectional (forward and reverse) switching control of the power supply, and the bidirectional switching circuit has low on-resistance to reduce power consumption, thereby improving the load regulation function. It has sufficient high voltage and high temperature operating capability, can withstand the use of high temperature environment and high voltage scenario, and has low quiescent current, which can extend battery life.

[0018] In some embodiments, the drain of the first switching transistor is connected to the drain of the second switching transistor, the source of the first switching transistor is connected to the positive terminal of the energy storage battery, and the source of the second switching transistor is connected to the load power supply terminal.

[0019] The gates of the first switch and the second switch are connected to the switch driving module.

[0020] In the technical solution of this application embodiment, the source of the first switching transistor is connected to the positive terminal of the energy storage battery, and the source of the second switching transistor is connected to the load power supply terminal. When the switching drive signal output by the switching drive module is low, the first and second switching transistors can be controlled to conduct simultaneously, realizing bidirectional current flow control between the energy storage battery and the load power supply terminal. This allows the energy storage battery to be charged and the load connected to the load power supply terminal to be powered simultaneously when the load power supply terminal is connected to an external power source. The sources of the first and second switching transistors are connected together, and their gates are also connected together. When both the first and second switching transistors are conducting, if the voltage of the energy storage battery is greater than that of the load power supply terminal, the energy storage battery outputs current through the body diode of the first switching transistor and outputs current to the load power supply terminal through the second switching transistor. If the voltage of the energy storage battery is less than that of the load power supply terminal, the load power supply terminal can output current through the body diode of the second switching transistor and charge the energy storage battery through the first switching transistor. In this way, the current transmission direction of the switching module can be flexibly controlled by the voltage of the load power supply terminal and the energy storage battery. The external power supply terminal can be connected to a charger, which can directly supply power to the load power supply terminal or charge the energy storage battery through the switching module. The bidirectional switching circuit has bidirectional (forward and reverse) switching control of the power supply, and the bidirectional switching circuit has low on-resistance to reduce power consumption, thereby improving the load regulation function. It has sufficient high voltage and high temperature operating capability, can withstand the use of high temperature environment and high voltage scenario, and has low quiescent current, which can extend battery life.

[0021] In some embodiments, the switch driving module includes: a first resistor, a second resistor, a third resistor, and a first diode;

[0022] The first end of the first resistor is connected to the energy storage battery, the first end of the second resistor is connected to the control terminal of the switch module, the second end of the first resistor, the second end of the second resistor, and the first end of the third resistor are all connected together, the second end of the third resistor and the anode of the first diode are all connected to the switch control module, and the cathode of the first diode is grounded through the push-button switch module.

[0023] In some embodiments, the push-button switch module includes: a first push-button switch, a first end of the first push-button switch being connected to the switch driving module, and a second end of the first push-button switch module being grounded.

[0024] In some embodiments, the signal sampling module includes: a second diode, a fourth resistor, and a first capacitor;

[0025] The cathode of the second diode is connected to the common node of the switch driving module and the push button switch module. The anode of the second diode, the first end of the fourth resistor, and the first end of the first capacitor are all connected to the main control circuit. The second end of the first capacitor is grounded, and the second end of the fourth resistor is connected to the first power supply terminal.

[0026] In some embodiments, the switch control module includes: a fifth resistor, a sixth resistor, a third switch transistor, a sixth switch transistor, and a seventh resistor;

[0027] The first end of the third switch is connected to the switch drive module. The second end of the third switch, the first end of the sixth resistor, and the first end of the seventh resistor are all connected to the main control circuit. The second end of the sixth resistor, the first end of the fifth resistor, and the control terminal of the third switch are all connected. The second end of the fifth resistor is connected to the second power supply terminal, and the second end of the seventh resistor is grounded.

[0028] A second aspect of this application also provides a power supply device, including a power supply circuit as described in any of the above embodiments.

[0029] A third aspect of this application also provides an Internet of Things (IoT) device, including: a main control circuit and a power supply circuit as described in any of the above embodiments; the power supply circuit is connected to the main control circuit and is used to supply power to the main control circuit.

[0030] The beneficial effects of this application's embodiments are as follows: The energy storage battery is connected to the load power supply terminal via a switch module. The connection state between the energy storage battery and the load power supply terminal can be controlled by controlling the switching state of the switch module. The switch control module and the push-button switch module can form two control paths to control the switching state of the switch module, achieving flexible control. The main control circuit can send corresponding power control signals to the switch control module, which then generates a switch control signal based on the power control signal and outputs it to the switch driver module. This controls the switch driver module to turn on the switch module, enabling the energy storage battery to supply power to the load power supply terminal. On the other hand, the push-button switch module can be controlled by the user's button presses, directly controlling the switch driver module to turn on the switch module, enabling the energy storage battery to supply power to the load power supply terminal. Furthermore, the signal sampling module detects the switching state of the push-button switch module in real time and feeds it back to the main control circuit. This achieves multiple power management options, allowing users to actively control the power supply to the load power supply terminal, or the main control circuit to control the power supply to the load power supply terminal, thus improving the user experience of IoT devices. Attached Figure Description

[0031] Figure 1 A schematic diagram of the power supply circuit provided in one embodiment of this application. Figure 1;

[0032] Figure 2 A schematic diagram of the power supply circuit provided in one embodiment of this application. Figure 2 ;

[0033] Figure 3 A schematic diagram of the power supply circuit provided in one embodiment of this application. Figure 3 ;

[0034] Figure 4 A schematic diagram of the power supply circuit provided in one embodiment of this application. Figure 4 ;

[0035] Figure 5 A schematic diagram of the power supply circuit provided in one embodiment of this application. Figure 5 ;

[0036] Figure 6 A schematic diagram of the power supply circuit provided in one embodiment of this application. Figure 6 ;

[0037] Figure 7 A schematic diagram of the power supply circuit provided in one embodiment of this application. Figure 7 . Detailed Implementation

[0038] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present application.

[0039] The term "comprising," and any variations thereof, in the specification, claims, and accompanying drawings of this application are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such processes, methods, products, or apparatus. Furthermore, the terms "first," "second," and "third," etc., are used to distinguish different objects, not to describe a specific order.

[0040] To address the aforementioned technical problems, this application provides a power supply circuit for an Internet of Things (IoT) device. The IoT device includes a main control circuit 100, and the power supply circuit can supply power to the main control circuit 100 and a load connected to the power supply circuit. Figure 1As shown, the power supply circuit in this embodiment includes: an energy storage battery 210, a switch module 220, a switch drive module 230, a switch control module 240, a signal sampling module 260, and a push-button switch module 250; the energy storage battery 210 is connected to the load power supply terminal 310 via the switch module 220; the switch control module 240 is connected to the control signal terminal of the main control circuit 100, and the switch control module 240 is used to generate a switch control signal according to the power control signal provided by the main control circuit 100 and output it to the switch drive module 230; the switch drive module 230 and the switch control module 240... The circuit is connected to the switch drive module 230, which generates a corresponding switch drive signal based on the switch control signal and outputs it to the switch module 220 to control the switch state of the switch module 220; the button switch module 250 is connected to the switch drive module 230, and controls the switch drive module 230 to generate a corresponding switch drive signal based on the user's button press action; the signal sampling module 260 is connected to the switch drive module 230, and samples the signal of the switch drive module 230 and generates a signal sampling signal to be output to the signal sampling terminal of the main control circuit 100.

[0041] In this embodiment, the energy storage battery 210 is connected to the load power supply terminal 310 via the switch module 220. The connection state between the energy storage battery 210 and the load power supply terminal 310 can be controlled by controlling the switching state of the switch module 220. The switch control module 240 and the push-button switch module 250 can form two control paths to control the switching state of the switch module 220, achieving flexible control of the switch module 220. The main control circuit 100 can send corresponding power control signals to the switch control module 240, thereby generating a switch control signal based on the power control signal and outputting it to the switch drive module 230 to control the switch drive module 230. The drive switch module 220 is turned on, enabling the energy storage battery 210 to supply power to the load power supply terminal 310. On the other hand, the button switch module 250 can be controlled by the user's button action to directly control the switch drive module 230 to drive the switch module 220 to turn on, enabling the energy storage battery 210 to supply power to the load power supply terminal 310. Furthermore, the signal sampling module 260 detects the switching state of the button switch module 250 in real time and feeds its switching state back to the main control circuit 100. This enables multiple power management methods, allowing the user to actively control the power supply to the load power supply terminal 310, or allowing the main control circuit 100 to control the power supply to the load power supply terminal 310, thus improving the user experience of IoT devices.

[0042] In some embodiments, see Figure 2As shown, the switching module 220 includes a first switching transistor Q1 and a second switching transistor Q2; the first switching transistor Q1 and the second switching transistor Q2 are connected in series back to back to form a bidirectional switching circuit, and the gates of the first switching transistor Q1 and the second switching transistor Q2 are connected to the switching drive module 230.

[0043] In this embodiment, the first switch Q1 and the second switch Q2 are connected back-to-back in series to form a bidirectional switching circuit. Because the first switch Q1 and the second switch Q2 are connected back-to-back, bidirectional current flow control between the energy storage battery 210 and the load power supply terminal 310 can be achieved. This allows the energy storage battery 210 to be charged and the load connected to the load power supply terminal 310 to be powered simultaneously when the load power supply terminal 310 is connected to an external power source. The source or drain of the first switch Q1 and the second switch Q2 are connected together, and their gates are connected together. When both the first switch Q1 and the second switch Q2 are turned on, if the voltage of the energy storage battery 210 is greater than that of the load power supply terminal 310, the energy storage battery 210 outputs current to the load power supply terminal 310 through the switching module 220. If the voltage of the energy storage battery 210 is less than that of the load power supply terminal 310, the load power supply terminal 310 can charge the energy storage battery 210 through the switching module 220. In this way, the current transmission direction of the switching module 220 can be flexibly controlled by the voltage of the load power supply terminal 310 and the energy storage battery 210. An external power supply terminal can be connected to a charger. At this time, the charger can directly supply power to the load power supply terminal 310, or charge the energy storage battery 210 through the switching module 220. The bidirectional switching circuit has bidirectional (forward and reverse) switching control of the power supply. In addition, the bidirectional switching circuit has low on-resistance to reduce power consumption, thereby improving the load regulation function. It has sufficient high voltage and high temperature operating capability, can withstand the use of high temperature environment and high voltage scenario, and has low quiescent current, which can extend battery life.

[0044] In some embodiments, see Figure 2 As shown, the source of the first switch Q1 is connected to the source of the second switch Q2, the drain of the first switch Q1 is connected to the positive terminal of the energy storage battery 210, and the drain of the second switch Q2 is connected to the load power supply terminal 310; the gates of the first switch Q1 and the second switch Q2 are connected to the switch drive module 230.

[0045] In this embodiment, the drain of the first switch Q1 is connected to the positive terminal of the energy storage battery 210, and the drain of the second switch Q2 is connected to the load power supply terminal 310. When the switch drive signal output by the switch drive module 230 is low, the first switch Q1 and the second switch Q2 can be controlled to be turned on simultaneously, thereby realizing bidirectional current flow control between the energy storage battery 210 and the load power supply terminal 310. This allows the energy storage battery 210 to be charged and the load connected to the load power supply terminal 310 to be powered simultaneously when the load power supply terminal 310 is connected to an external power source. The sources of the first switch Q1 and the second switch Q2 are connected together, and the gates of the first switch Q1 and the second switch Q2 are connected together. When both the first switch Q1 and the second switch Q2 are turned on, if the voltage of the energy storage battery 210 is greater than that of the load power supply terminal 310, the energy storage battery 210 outputs current through the first switch Q1 and outputs current to the load power supply terminal 310 through the body diode of the second switch Q2. If the voltage of the energy storage battery 210 is less than that of the load power supply terminal 310, the load power supply terminal 310 can output current through the second switch Q2 and charge the energy storage battery 210 through the body diode of the first switch Q1. In this way, the current transmission direction of the switching module 220 can be flexibly controlled by the voltage of the load power supply terminal 310 and the energy storage battery 210. An external power supply terminal can be connected to a charger. At this time, the charger can directly supply power to the load power supply terminal 310, or charge the energy storage battery 210 through the switching module 220. The bidirectional switching circuit has bidirectional (forward and reverse) switching control of the power supply. In addition, the bidirectional switching circuit has low on-resistance to reduce power consumption, thereby improving the load regulation function. It has sufficient high voltage and high temperature operating capability, can withstand the use of high temperature environment and high voltage scenario, and has low quiescent current, which can extend battery life.

[0046] In some embodiments, see Figure 3 As shown, the drain of the first switch Q1 is connected to the drain of the second switch Q2, the source of the first switch Q1 is connected to the positive terminal of the energy storage battery 210, and the source of the second switch Q2 is connected to the load power supply terminal 310; the gates of the first switch Q1 and the second switch Q2 are connected to the switch drive module 230.

[0047] In this embodiment, the source of the first switch Q1 is connected to the positive terminal of the energy storage battery 210, and the source of the second switch Q2 is connected to the load power supply terminal 310. When the switch drive signal output by the switch drive module 230 is low, the first switch Q1 and the second switch Q2 can be controlled to be turned on simultaneously, thereby realizing bidirectional current flow control between the energy storage battery 210 and the load power supply terminal 310. This allows the energy storage battery 210 to be charged and the load connected to the load power supply terminal 310 to be powered simultaneously when the load power supply terminal 310 is connected to an external power source. The sources of the first switch Q1 and the second switch Q2 are connected together, and the gates of the first switch Q1 and the second switch Q2 are connected together. When both the first switch Q1 and the second switch Q2 are turned on, if the voltage of the energy storage battery 210 is greater than that of the load power supply terminal 310, the energy storage battery 210 outputs current through the body diode of the first switch Q1, and outputs current to the load power supply terminal 310 through the second switch Q2. If the voltage of the energy storage battery 210 is less than that of the load power supply terminal 310, the load power supply terminal 310 can output current through the body diode of the second switch Q2, and charge the energy storage battery 210 through the first switch Q1. In this way, the current transmission direction of the switching module 220 can be flexibly controlled by the voltage of the load power supply terminal 310 and the energy storage battery 210. An external power supply terminal can be connected to a charger. At this time, the charger can directly supply power to the load power supply terminal 310, or charge the energy storage battery 210 through the switching module 220. The bidirectional switching circuit has bidirectional (forward and reverse) switching control of the power supply. In addition, the bidirectional switching circuit has low on-resistance to reduce power consumption, thereby improving the load regulation function. It has sufficient high voltage and high temperature operating capability, can withstand the use of high temperature environment and high voltage scenario, and has low quiescent current, which can extend battery life.

[0048] In some embodiments, the first switching transistor Q1 may be a P-type MOS transistor.

[0049] In some embodiments, the second switch Q2 can be a P-type MOS transistor.

[0050] In this embodiment, the switching states of the first switch Q1 and the second switch Q2 are controlled by the level of their gates, that is, by the level of the switch drive signal output by the switch drive module 230. The level of the switch drive signal output by the switch drive module 230 is determined by the switch control module 240 and the push button switch module 250. Both the user and the main control circuit 100 can realize the power supply control of the load power supply terminal 310 of the Internet of Things device.

[0051] For example, when the main control circuit 100 is woken up, it can send a corresponding power control signal to the switch control module 240. The switch control module 240 then generates a switch control signal based on the power control signal and outputs it to the switch driver module 230. This controls the switch driver module 230 to turn on the switch module 220, enabling the energy storage battery 210 to supply power to the load power supply terminal 310. On the other hand, the button switch module 250 can be controlled by the user's button presses, directly controlling the switch driver module 230 to turn on the switch module 220, enabling the energy storage battery 210 to supply power to the load power supply terminal 310. Furthermore, the signal sampling module 260 monitors the switching state of the button switch module 250 in real time and feeds it back to the main control circuit 100. This achieves multiple power management options, allowing users to actively control the power supply to the load power supply terminal 310, or the main control circuit 100 to control the power supply to the load power supply terminal 310, thus improving the user experience of IoT devices.

[0052] In some embodiments, see Figure 4 As shown, the switch drive module 230 includes: a first resistor R1, a second resistor R2, a third resistor R3, and a first diode D1; the first end of the first resistor R1 is connected to the energy storage battery 210, the first end of the second resistor R2 is connected to the control terminal of the switch module 220, the second ends of the first resistor R1, the second ends of the second resistor R2, and the first end of the third resistor R3 are connected together, the second end of the third resistor R3 and the anode of the first diode D1 are connected together to the switch control module 240, and the cathode of the first diode D1 is grounded through the push-button switch module 250.

[0053] In this embodiment, the second resistor R2 and the third resistor R3 are connected in series. The energy storage battery is connected to the push button switch module 250 via the first resistor R1, the third resistor R3, and the first diode D1. When the switch control module 240 and the push button switch module 250 are turned off, a higher voltage can be generated through the second resistor R2 and the third resistor R3, which turns off the first switch Q1 and the second switch Q2.

[0054] In some embodiments, see Figure 5 As shown, the push button switch module 250 includes: a first push button switch S1, the first end of the first push button switch S1 is connected to the switch driver module 230, and the second end of the first push button switch S1 module 250 is grounded.

[0055] In some embodiments, see Figure 5 As shown, the switch module 220 also includes a second capacitor C2 and an eighth resistor R8. The first end of the second capacitor C2 is connected to the common node of the first switch Q1 and the second switch Q2, and the second end of the second capacitor C2 is connected to the switch control module 240. The eighth resistor R8 is connected in parallel with the second capacitor C2.

[0056] In some embodiments, see Figure 6 As shown, the signal sampling module 260 includes: a second diode D2, a fourth resistor R4, and a first capacitor C1; the cathode of the second diode D2 is connected to the common node of the switch driving module 230 and the push-button switch module 250, and the anode of the second diode D2, the first end of the fourth resistor R4, and the first end of the first capacitor C1 are all connected to the main control circuit 100, the second end of the first capacitor C1 is grounded, and the second end of the fourth resistor R4 is connected to the first power supply terminal VDD1.

[0057] In some embodiments, see Figure 7 As shown, the switch control module 240 includes: a fifth resistor R5, a sixth resistor R6, a third switch Q3, a sixth switch R6, and a seventh resistor R7; the first end of the third switch Q3 is connected to the switch drive module 230, the second end of the third switch Q3, the first end of the sixth resistor R6, and the first end of the seventh resistor R7 are all connected to the main control circuit 100, the second end of the sixth resistor R6, the first end of the fifth resistor R5, and the control terminal of the third switch Q3 are all connected, the second end of the fifth resistor R5 is connected to the second power supply terminal VDD2, and the second end of the seventh resistor R7 is grounded.

[0058] In some embodiments, the third switch Q3 can be a P-type MOSFET or an N-type MOSFET.

[0059] In some embodiments, the energy storage battery 110 may be a lithium battery.

[0060] This application also provides a power supply device, including a power supply circuit as described in any of the above embodiments.

[0061] This application also provides an Internet of Things (IoT) device, including: a main control circuit 100, and a power supply circuit of any of the above embodiments; the power supply circuit is connected to the main control circuit 100 and is used to supply power to the main control circuit 100.

[0062] In this embodiment, the energy storage battery 210 is connected to the load power supply terminal 310 via the switch module 220. The connection state between the energy storage battery 210 and the load power supply terminal 310 can be controlled by controlling the switching state of the switch module 220. The switch control module 240 and the push-button switch module 250 can form two control paths to control the switching state of the switch module 220, achieving flexible control of the switch module 220. The main control circuit 100 can send corresponding power control signals to the switch control module 240, thereby generating a switch control signal based on the power control signal and outputting it to the switch drive module 230 to control the switch drive module 230. The drive switch module 220 is turned on, enabling the energy storage battery 210 to supply power to the load power supply terminal 310. On the other hand, the button switch module 250 can be controlled by the user's button action to directly control the switch drive module 230 to drive the switch module 220 to turn on, enabling the energy storage battery 210 to supply power to the load power supply terminal 310. Furthermore, the signal sampling module 260 detects the switching state of the button switch module 250 in real time and feeds its switching state back to the main control circuit 100. This enables multiple power management methods, allowing the user to actively control the power supply to the load power supply terminal 310, or allowing the main control circuit 100 to control the power supply to the load power supply terminal 310, thus improving the user experience of IoT devices.

[0063] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is used as an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0064] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0065] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0066] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0067] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A power supply circuit for use in Internet of Things (IoT) devices, characterized in that, The IoT device also includes a main control circuit, and the power supply circuit includes: an energy storage battery, a switch module, a switch driver module, a switch control module, a signal sampling module, and a push-button switch module; The energy storage battery is connected to the load power supply terminal via the switching module; The switch control module is connected to the control signal terminal of the main control circuit. The switch control module is used to generate a switch control signal based on the power control signal provided by the main control circuit and output it to the switch drive module. The switch driving module is connected to the switch control module. The switch driving module is used to generate a corresponding switch driving signal according to the switch control signal and output it to the switch module to control the switching state of the switch module. The button switch module is connected to the switch driver module, and the button switch module is used to control the switch driver module to generate corresponding switch drive signals according to the user's button operation. The signal sampling module is connected to the switch driving module and is used to sample the signal of the switch driving module and generate a signal sampling signal to be output to the signal sampling terminal of the main control circuit.

2. The power supply circuit as described in claim 1, characterized in that, The switching module includes: a first switching transistor and a second switching transistor; The first and second switching transistors are connected in series back to back to form a bidirectional switching circuit, and the gates of the first and second switching transistors are connected to the switch driving module.

3. The power supply circuit as described in claim 2, characterized in that, The source of the first switching transistor is connected to the source of the second switching transistor, the drain of the first switching transistor is connected to the positive terminal of the energy storage battery, and the drain of the second switching transistor is connected to the load power supply terminal. The gates of the first switch and the second switch are connected to the switch driving module.

4. The power supply circuit as described in claim 2, characterized in that, The drain of the first switching transistor is connected to the drain of the second switching transistor, the source of the first switching transistor is connected to the positive terminal of the energy storage battery, and the source of the second switching transistor is connected to the load power supply terminal. The gates of the first switch and the second switch are connected to the switch driving module.

5. The power supply circuit as described in claim 1, characterized in that, The switch driving module includes: a first resistor, a second resistor, a third resistor, and a first diode; The first end of the first resistor is connected to the energy storage battery, the first end of the second resistor is connected to the control terminal of the switch module, the second end of the first resistor, the second end of the second resistor, and the first end of the third resistor are all connected together, the second end of the third resistor and the anode of the first diode are all connected to the switch control module, and the cathode of the first diode is grounded through the push-button switch module.

6. The power supply circuit as described in claim 1, characterized in that, The push-button switch module includes: a first push-button switch, a first end of which is connected to the switch driving module, and a second end of the first push-button switch module is grounded.

7. The power supply circuit as described in claim 1, characterized in that, The signal sampling module includes: a second diode, a fourth resistor, and a first capacitor; The cathode of the second diode is connected to the common node of the switch driving module and the push button switch module. The anode of the second diode, the first end of the fourth resistor, and the first end of the first capacitor are all connected to the main control circuit. The second end of the first capacitor is grounded, and the second end of the fourth resistor is connected to the first power supply terminal.

8. The power supply circuit as described in claim 4, characterized in that, The switch control module includes: a fifth resistor, a sixth resistor, a third switch transistor, a sixth switch transistor, and a seventh resistor; The first end of the third switch is connected to the switch drive module. The second end of the third switch, the first end of the sixth resistor, and the first end of the seventh resistor are all connected to the main control circuit. The second end of the sixth resistor, the first end of the fifth resistor, and the control terminal of the third switch are all connected. The second end of the fifth resistor is connected to the second power supply terminal, and the second end of the seventh resistor is grounded.

9. A power supply device, characterized in that, include: The power supply circuit as described in any one of claims 1-8.

10. An Internet of Things (IoT) device, characterized in that, include: The main control circuit, and the power supply circuit as described in any one of claims 1-8; The power supply circuit is connected to the main control circuit and is used to supply power to the main control circuit.

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