CN116914898B - Power supply circuit and power supply method of intelligent equipment and intelligent equipment - Google Patents
Power supply circuit and power supply method of intelligent equipment and intelligent equipment Download PDFInfo
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- CN116914898B CN116914898B CN202311185288.XA CN202311185288A CN116914898B CN 116914898 B CN116914898 B CN 116914898B CN 202311185288 A CN202311185288 A CN 202311185288A CN 116914898 B CN116914898 B CN 116914898B
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000004146 energy storage Methods 0.000 claims abstract description 108
- 238000012545 processing Methods 0.000 claims abstract description 44
- 239000003990 capacitor Substances 0.000 claims description 30
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 238000010586 diagram Methods 0.000 description 15
- 230000008054 signal transmission Effects 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 3
- 230000002459 sustained effect Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004297 night vision Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/50—Charging of capacitors, supercapacitors, ultra-capacitors or double layer capacitors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application relates to a power supply circuit and a power supply method of intelligent equipment and the intelligent equipment, comprising the following steps: the power supply, the energy storage circuit, the processing circuit and the switching circuit are respectively connected with the power supply, the energy storage circuit and the processing circuit; the processing circuit is used for controlling the switching circuit to enable the power supply to be connected with the power utilization load in a conducting way when the current electric quantity of the power supply is larger than a first undervoltage threshold value, and the power supply supplies power to the power utilization load; when the current electric quantity of the power supply is smaller than or equal to a first undervoltage threshold value, the switching circuit is controlled so that the power supply is disconnected with the power utilization load and is connected with the energy storage circuit in a conducting manner, and the power supply charges the energy storage circuit; and the power supply and the energy storage circuit jointly supply power for the electric load. After the energy storage circuit is charged, the power supply and the energy storage circuit charge the power utilization load, so that the driving force of the power supply is improved.
Description
Technical Field
The present application relates to the field of charge and discharge technologies, and in particular, to a power supply circuit and a power supply method for an intelligent device, and the intelligent device.
Background
With the development and progress of technology, various types of load devices (e.g., smart devices) are widely used in the life of users, for example, smart devices commonly used by target users include smart door locks, motion cameras, and smart curtain robots.
At present, load equipment is generally powered by a power supply, and when the power supply discharges to a certain residual electric quantity, large-current discharge cannot be sustained in most cases, so that the cruising ability of the load equipment is poor.
Disclosure of Invention
Based on this, it is necessary to provide a power supply circuit, a power supply method, and an intelligent device that can improve the cruising ability.
In a first aspect, the present application provides a power supply circuit of an intelligent device, including: the power supply, the energy storage circuit, the processing circuit and the switching circuit are respectively connected with the power supply, the energy storage circuit and the processing circuit;
The processing circuit is used for controlling the switching circuit to enable the power supply to be connected with the power utilization load in a conducting way when the current electric quantity of the power supply is larger than a first undervoltage threshold value, and the power supply supplies power to the power utilization load;
The processing circuit is also used for controlling the switching circuit to disconnect the power supply from the power load and connect the power supply with the energy storage circuit in a conducting way when the current electric quantity of the power supply is smaller than or equal to a first undervoltage threshold value, and the power supply charges the energy storage circuit;
the processing circuit is also used for controlling the switching circuit when the current electric quantity of the energy storage circuit is larger than a second undervoltage threshold value so that the energy storage circuit is connected with the power utilization load in a conducting mode, and the power supply and the energy storage circuit supply power for the power utilization load together.
In one embodiment, the switching circuit includes a first switching module, a second switching module, and a third switching module, wherein,
The power supply is connected with the power utilization load through the first switch module and the energy storage circuit through the second switch module respectively;
the energy storage circuit is connected with an electric load through a third switch module;
The processing circuit is respectively connected with the control end of the first switch module, the control end of the second switch module and the control end of the third switch module.
In one embodiment, the processing circuit includes a controller having a first signal receiving pin, a second signal receiving pin, a first signal transmitting pin, a second signal transmitting pin, and a third signal transmitting pin configured thereon;
the first signal receiving pin is connected with a power supply, and the second signal receiving pin is connected with an energy storage circuit;
the first signal sending pin, the second signal sending pin and the third signal sending pin are respectively connected with each control end of the first switch module, the first signal sending pin, the second signal sending pin and the third signal sending pin are respectively connected with each control end of the second switch module, and the first signal sending pin, the second signal sending pin and the third signal sending pin are respectively connected with each control end of the third switch module.
In one embodiment, the first switch module includes a first switch transistor, a second switch transistor, and a third switch transistor, a first pole of the first switch transistor is connected to the power supply, a second pole of the first switch transistor is connected to a first pole of the second switch transistor, a second pole of the second switch transistor is connected to a first pole of the third switch transistor, a gate of the first switch transistor and a gate of the second switch transistor are both connected to a first pole of the sixth switch transistor, and a gate of the third switch transistor is connected to a first pole of the seventh switch transistor;
The second switch module includes: a first switching transistor, a second switching transistor, and a fourth switching transistor; the second pole of the second switching transistor is connected with the first end of the energy storage circuit, and the first pole of the fourth switching transistor is connected with the second end of the energy storage circuit;
The third switch module includes: a third switching transistor and a fifth switching transistor, wherein a first pole of the fifth switching transistor is connected to the second terminal of the tank circuit.
In one embodiment, the power supply circuit further comprises a first resistor connected to the first pole of the sixth switching transistor and a second resistor connected to the first pole of the seventh switching transistor.
In one embodiment, the power supply circuit further comprises a voltage conversion circuit connected to the second pole of the third switching transistor and to the power consuming load.
In one embodiment, the power supply circuit further comprises a current limiting circuit connected to the second terminal of the tank circuit and to the first pole of the fourth switching transistor.
In one embodiment, the current limiting circuit includes at least two resistors connected in parallel.
In one embodiment, the power supply circuit further includes a filter circuit, and the filter circuit is connected to the first signal transmitting pin and connected to the second pole and the gate of the fifth switching transistor.
In one embodiment, a tank circuit includes: the super capacitor comprises a first capacitor and a second capacitor, and the second end of the first capacitor is connected with the first end of the second capacitor.
In a second aspect, the present application further provides a power supply method for an intelligent device, including:
Acquiring the current electric quantity of a power supply;
when the current electric quantity of the power supply is larger than a first undervoltage threshold value, controlling the power supply to be connected with the power utilization load in a conducting way so that the power supply supplies power to the power utilization load;
When the current electric quantity of the power supply is smaller than or equal to a first undervoltage threshold value, the power supply is controlled to be disconnected with the power load and connected with the energy storage circuit in a conducting mode, so that the power supply charges the energy storage circuit, and the current electric quantity of the energy storage circuit is obtained in real time;
when the current electric quantity of the energy storage circuit is larger than the second undervoltage threshold value, the energy storage circuit is connected with the power utilization load in a conducting mode, so that the power supply and the energy storage circuit supply power for the power utilization load together.
In one embodiment, when the current electric quantity of the energy storage circuit is not greater than a third undervoltage threshold value, the control power supply and the energy storage circuit are disconnected with the electric load; and controlling the power supply to be connected with the energy storage circuit in a conducting way so as to charge the energy storage circuit by the power supply until the current electric quantity of the power supply is lower than a lowest preset value, wherein the lowest preset value is that the electric quantity of the power supply does not meet the condition of charging the energy storage circuit.
In a third aspect, the application also provides an intelligent device comprising an electric load and the power supply circuit.
The power supply circuit, the power supply method and the intelligent device of the intelligent device are characterized in that the processing circuit is connected with the switching circuit, and the switching circuit can be controlled by the processing circuit; when the current electric quantity of the power supply is larger than a first undervoltage threshold value, the processing circuit can conduct connection between the power supply and the power utilization load through controlling the switching circuit, and power is supplied to the power utilization load through the power supply; when the current electric quantity of the power supply is smaller than or equal to a first undervoltage threshold value, the processing circuit can disconnect the power supply from the power utilization load by controlling the switch circuit, and the connection between the power supply and the energy storage circuit is conducted, so that the energy storage circuit is charged by the power supply; when the current electric quantity of the energy storage circuit is larger than the second undervoltage threshold value, the processing circuit can conduct connection between the energy storage circuit and the power utilization load through controlling the switching circuit, conduct connection between the power supply and the power utilization load, and supply power for the power utilization load through the power supply and the energy storage circuit together. Obviously, in this embodiment, when the current electric quantity of the power supply is smaller than or equal to the first undervoltage threshold, the power supply is used to charge the energy storage circuit first, after the charging is completed, the power supply, the energy storage circuit and the power utilization load are connected, and the power utilization load is charged through the power supply, the power supply driving force is improved, and the endurance of the power utilization load is increased.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments or the conventional techniques of the present application, the drawings required for the descriptions of the embodiments or the conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
Fig. 1 is a schematic diagram of a first power supply circuit according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a second power supply circuit according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a third power supply circuit according to an embodiment of the present application;
Fig. 4a is a schematic structural diagram of a first switch module according to an embodiment of the application;
fig. 4b is a schematic structural diagram of a second switch module according to an embodiment of the application;
fig. 4c is a schematic structural diagram of a third switch module according to an embodiment of the application;
fig. 5 is a schematic structural diagram of a fourth power supply circuit according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a fifth power supply circuit according to an embodiment of the present application;
fig. 7 is a flowchart of a circuit power supply method according to an embodiment of the application.
Reference numerals illustrate:
10-power supply, 11-tank circuit, 12-processing circuit, 121-controller, 1211-first signal receiving pin, 1212-second signal receiving pin, 1213-first signal transmitting pin, 1214-second signal transmitting pin, 1215-third signal transmitting pin, 13-switch circuit, 131-first switch module, 132-second switch module, 133-third switch module, 14-electric load, 15-voltage converting circuit, 16-current limiting circuit, 17-filter circuit, 18-feedback circuit.
Detailed Description
In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. Embodiments of the application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, 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 in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that the terms first, second, etc. as used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element. For example, a first resistance may be referred to as a second resistance, and similarly, a second resistance may be referred to as a first resistance, without departing from the scope of the application. Both the first resistor and the second resistor are resistors, but they are not the same resistor.
It is to be understood that in the following embodiments, "connected" is understood to mean "electrically connected", "communicatively connected", etc., if the connected circuits, modules, units, etc., have electrical or data transfer between them.
It is understood that "at least one" means one or more and "a plurality" means two or more. "at least part of an element" means part or all of the element.
As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof. Also, the term "and/or" as used in this specification includes any and all combinations of the associated listed items.
With the development and progress of technology, load devices (e.g., smart devices) are widely used in the life of users, and for example, load devices commonly used by target users include smart door locks, motion cameras, and smart curtain robots.
At present, load equipment is generally powered by a power supply, when the power supply discharges to about 30% of the residual electric quantity, large-current discharge cannot be sustained, for example, scenes such as infrared night vision of a camera and shooting in a flash lamp mode, a door opening and closing driving motor of an intelligent lock can bring load current requirements of more than 300-600mA, and when the power supply is 30% of the capacity, large shaking can be generated after the large-current discharge is sustained. Therefore, the general load device will give an alarm about 30% of the power to alert the user to change the power, which will certainly cause poor endurance of the load device, so how to improve the endurance of the load device is a technical problem to be solved.
In view of the above-mentioned shortcomings of the prior art, an object of the present application is to provide a power supply circuit, which aims to effectively improve the endurance of a load device (e.g. a smart device).
As shown in fig. 1, the present application provides a power supply circuit 1 of an intelligent device, including: a power supply 10, a tank circuit 11, a processing circuit 12 and a switch circuit 13, wherein the switch circuit 13 is respectively connected with the power supply 10, the tank circuit 11 and the processing circuit 12; the processing circuit 12 is configured to control the switching circuit 13 to connect the power supply 10 to the power consumption load 14 in a conductive manner when the current power of the power supply 10 is greater than the first undervoltage threshold, and the power supply 10 supplies power to the power consumption load 14; the processing circuit 12 is further configured to control the switch circuit 13 to disconnect the power supply 10 from the power load 14 and connect the power supply 10 to the energy storage circuit 11 when the current electric quantity of the power supply 10 is less than or equal to a first undervoltage threshold, and the power supply 10 charges the energy storage circuit 11; the processing circuit 12 is further configured to control the switch circuit 13 to connect the tank circuit 11 to the power load 14 when the current power of the tank circuit 11 is greater than the second undervoltage threshold, and the power supply 10 and the tank circuit 11 together supply power to the power load 14.
In the present embodiment, the processing circuit 12 is connected to the switching circuit 13, and the switching circuit 13 can be controlled by the processing circuit 12; when the current electric quantity of the power supply 10 is larger than the first undervoltage threshold value, the processing circuit 12 can conduct the connection between the power supply 10 and the power utilization load 14 by controlling the switch circuit 13, and power the power utilization load 14 through the power supply 10; when the current electric quantity of the power supply 10 is smaller than or equal to a first undervoltage threshold value, the processing circuit 12 can disconnect the power supply 10 from the power utilization load 14 by controlling the switch circuit 13, and conduct the connection between the power supply 10 and the energy storage circuit 11, and charge the energy storage circuit 11 through the power supply 10; when the current electric quantity of the energy storage circuit 11 is greater than the second undervoltage threshold value, the processing circuit 12 can control the switch circuit 13 to conduct the connection between the energy storage circuit 11 and the electric load 14, conduct the connection between the power supply 10 and the electric load 14, and supply power to the electric load 14 through the power supply 10 and the energy storage circuit 11 together. Obviously, in the present embodiment, when the current electric quantity of the power supply 10 is less than or equal to the first undervoltage threshold, the power supply 10 is used to charge the energy storage circuit 11, after the charging is completed, the power supply 10, the energy storage circuit 11 and the power consumption load 14 are connected, and the power consumption load 14 is charged through both the power supply 10 and the energy storage circuit 11, so that the driving force of the power supply 10 is improved, and the endurance of the power consumption load 14 is increased.
In one embodiment, the processing circuit 12 is further configured to control the switching circuit 13 to disconnect the power supply 10 and the tank circuit 11 from the power load 14 when the current power of the tank circuit 11 is not greater than the third under-voltage threshold; and controlling the power supply 10 to be connected with the energy storage circuit 11 in a conducting manner, so that the power supply 10 charges the energy storage circuit 11 until the current electric quantity of the power supply 10 is lower than a minimum preset value, wherein the minimum preset value is that the electric quantity of the power supply 10 does not meet the condition of charging the energy storage circuit 11.
In one embodiment, fig. 2 is a schematic structural diagram of a power supply circuit 1 of a second intelligent device according to an embodiment of the present application, as shown in fig. 2, a switch circuit 13 includes a first switch module 131, a second switch module 132, and a third switch module 133, where a power supply 10 is connected to an electric load 14 through the first switch module 131 and connected to an energy storage circuit 11 through the second switch module 132 respectively; the energy storage circuit 11 is connected with the electric load 14 through the third switch module 133; the processing circuit 12 is connected to the control terminal of the first switch module 131, the control terminal of the second switch module 132, and the control terminal of the third switch module 133, respectively.
The processing circuit 12 may be respectively connected to a control end of the first switch module 131, a control end of the second switch module 132, and a control end of the third switch module 133, and when the current electric quantity of the power supply 10 is greater than the first under-voltage threshold value, the processing circuit 12 makes the first switch module 131 be respectively connected to the power supply 10 and the power consumption load 14 through the control end of the first switch module 131, and makes the power supply 10 supply power to the power consumption load 14 through the first switch module 131; when the current electric quantity of the power supply 10 is smaller than or equal to the first undervoltage threshold value, the processing circuit 12 enables the second switch module 132 to be respectively connected with the power supply 10 and the energy storage circuit 11 through the control end of the second switch module 132, and further enables the power supply 10 to charge the energy storage circuit 11 through the second switch module 132; when the current electric quantity of the energy storage circuit 11 is greater than the second undervoltage threshold, the processing circuit 12 connects the third switch module 133 with the power supply 10, the energy storage circuit 11 and the power consumption load 14 respectively through the control end of the third switch module 133, so that the power supply 10 and the energy storage circuit 11 charge the power consumption load 14 together through the third switch module 133, and the driving force of the power supply 10 is improved, and the cruising ability of the power consumption load 14 is improved.
In one embodiment, fig. 3 is a schematic structural diagram of a power supply circuit 1 of a third smart device according to an embodiment of the present application, as shown in fig. 3, the processing circuit 12 includes a controller 121, where the controller 121 may be a motor controller (Motor Control Unit, MCU). The controller 121 is configured with a first signal receiving pin 1211, a second signal receiving pin 1212, a first signal transmitting pin 1213, a second signal transmitting pin 1214, and a third signal transmitting pin 1215; the first signal receiving pin 1211 is connected to the power source 10, and the second signal receiving pin 1212 is connected to the tank circuit 11. The first signal receiving pin 1211 is connected to the power source 10, so that the current power of the power source 10 can be monitored in real time; the second signal receiving pin 1212 is connected to the tank circuit 11 to monitor the current power of the tank circuit 11 in real time.
The first, second and third switching modules 131, 132 and 133 each include at least one switching transistor, each of which may include a Metal-Oxide-Semiconductor (MOS) field effect transistor, which may be a PMOS transistor or an NMOS transistor. The control terminals of the first switch module 131, the second switch module 132, and the third switch module 133 refer to gates of switching transistors included in the respective switch modules.
The first signal transmitting pin 1213, the second signal transmitting pin 1214 and the third signal transmitting pin 1215 are respectively connected to the control terminals of the first switch module 131, and the power supply 10 is controlled to supply power to the power load 14 through the first switch module 131 by the control terminals of the first switch module 131 and the signal states (e.g., high level signal or low level signal) respectively output from the first signal transmitting pin 1213, the second signal transmitting pin 1214 and the third signal transmitting pin 1215. The first signal transmitting pin 1213, the second signal transmitting pin 1214 and the third signal transmitting pin 1215 are respectively connected to the control terminals of the second switch module 132, and the power supply 10 is controlled to charge the tank circuit 11 through the second switch module 132 by the control terminals of the second switch module 132 and the signal states (e.g., high level signal or low level signal) respectively output from the first signal transmitting pin 1213, the second signal transmitting pin 1214 and the third signal transmitting pin 1215. The first signal transmitting pin 1213, the second signal transmitting pin 1214 and the third signal transmitting pin 1215 are connected to respective control terminals of the third switch module 133, respectively. The control power supply 10 and the tank circuit 11 charge the electric load 14 through the third switch module 133 together by the respective control ends of the third switch module 133 and the signal states (for example, high level signal or low level signal) respectively output by the first signal transmitting pin 1213, the second signal transmitting pin 1214 and the third signal transmitting pin 1215, so that the driving force of the power supply 10 is improved, and the cruising ability of the electric load 14 is increased.
To facilitate distinguishing between the signal pins, the first signal receiving pin 1211 may be represented by cap_dem (not shown), the second signal receiving pin 1212 may be represented by cap_det, the first signal transmitting pin 1213 may be represented by cap_a, the second signal transmitting pin 1214 may be represented by cap_d, and the third signal transmitting pin 1215 may be represented by VM/EN.
In an embodiment, fig. 4a is a schematic structural diagram of a first switch module 131 according to an embodiment of the present application, as shown in fig. 4a, the first switch module 131 includes a first switch transistor Q1, a second switch transistor Q2 and a third switch transistor Q3, a first pole of the first switch transistor Q1 is connected to the power supply 10, a second pole of the first switch transistor Q1 is connected to a first pole of the second switch transistor Q2, a second pole of the second switch transistor Q2 is connected to a first pole of the third switch transistor Q3, a gate of the first switch transistor Q1 and a gate of the second switch transistor Q2 are connected to a first pole of the sixth switch transistor Q6, and a gate of the third switch transistor Q3 is connected to a first pole of the seventh switch transistor Q7.
Fig. 4b is a schematic structural diagram of a second switch module 132 according to an embodiment of the application; as shown in fig. 4b, the second switch module 132 includes: a first switching transistor Q1, a second switching transistor Q2, and a fourth switching transistor Q4; the second pole of the second switching transistor Q2 is connected to the first terminal of the tank circuit 11, and the first pole of the fourth switching transistor Q4 is connected to the second terminal of the tank circuit 11.
Fig. 4c is a schematic structural diagram of a third switch module 133 according to an embodiment of the application, and as shown in fig. 4c, the third switch module 133 includes: a third switching transistor Q3 and a fifth switching transistor Q5, wherein a first pole of the fifth switching transistor Q5 is connected to the second terminal of the tank circuit 11 and a second pole of the fifth switching transistor Q5 is connected to the power supply 10.
In this embodiment, the first pole of each switching transistor is one of the source and the drain of the switching transistor, and the second pole of each switching transistor is the other of the source and the drain of the switching transistor.
The first, second, third and fifth switching transistors Q1, Q2, Q3 and Q5 may be PMOS transistors, and the fourth, sixth and seventh switching transistors Q4, Q6 and Q7 may be NMOS transistors.
Fig. 5 is a schematic structural diagram of a fourth power supply circuit according to an embodiment of the present application; as shown in fig. 5, the first signal transmitting pin 1213 (cap_a) is connected to the gate of the fifth switching transistor Q5 and the gate of the fourth switching transistor Q4, the second signal transmitting pin 1214 (cap_d) is connected to the gate of the sixth switching transistor Q6, and the third signal transmitting pin 1215 (VM/EN) is connected to the gate of the seventh switching transistor Q7.
As shown in fig. 4a and fig. 5, the gate of the first switching transistor Q1 and the gate of the second switching transistor Q2 are both connected to the first pole of the sixth switching transistor Q6, and when the current power of the power supply 10 is greater than the first under-voltage threshold, the power supply 10 can be caused to supply power to the power load 14 (e.g. a motor) by the controller 121 as follows: first, the controller 121 controls the second signal transmitting pin 1214 (cap_d) to output a high level signal, so that the sixth switching transistor Q6 (NMOS transistor) is turned on, and in the state where the sixth switching transistor Q6 is turned on, the first switching transistor Q1 (PMOS transistor) and the second switching transistor Q2 (PMOS transistor) are also turned on, so that the second pole of the first switching transistor Q1 is connected to the first pole of the second switching transistor Q2; next, the controller 121 controls the first signal transmitting pin 1213 (cap_a) to output a low level signal, turns on the fifth switching transistor Q5 (PMOS transistor), turns off the fourth switching transistor Q4 (NMOS transistor), and cuts off a path for charging the tank circuit 11. Then, the gate of the third switching transistor Q3 is connected to the first pole of the seventh switching transistor Q7; the controller 121 controls the third signal transmission pin 1215 (VM/EN) to output a high level signal to turn on the seventh switching transistor Q7 (NMOS transistor), and in the on state of the seventh switching transistor Q7, the third switching transistor Q3 (PMOS transistor) is also turned on, so that the second pole of the second switching transistor Q2 is connected to the first pole of the third switching transistor Q3.
That is, the controller 121 controls the second signal transmission pin 1214 (cap_d) to output a high level signal, controls the first signal transmission pin 1213 (cap_a) to output a low level signal, and controls the third signal transmission pin 1215 (VM/EN) to output a high level signal, and in a state where the first, second, and third switching transistors Q1, Q2, Q3 are turned on, as shown in fig. 4a, the power supply 10 is used to charge the power consumer 14 (e.g., a motor).
In an embodiment, as shown in fig. 4a and 5, the power supply circuit further includes a voltage conversion circuit 15, and the voltage conversion circuit 15 is connected to the second pole of the third switching transistor Q3 and to the power load 14.
The voltage conversion circuit 15 is configured to convert a voltage in the circuit, specifically, the first switching transistor Q1, the second switching transistor Q2, and the third switching transistor Q3 are turned on, and the voltage of the power supply 10 for charging the electrical load 14 (e.g., a motor) is converted through an enable pin of the voltage conversion circuit 15.
As shown in fig. 4b and fig. 5, when the current power of the power supply 10 is smaller than the first under-voltage threshold, the controller 121 may control the power supply 10 to charge the tank circuit 11, which specifically includes the following steps: first, the controller 121 controls the third signal transmission pin 1215 (VM/EN) to output a low level signal, turns off the seventh switching transistor Q7 (NMOS transistor), and turns off the third switching transistor Q3 (PMOS transistor) and the voltage conversion circuit 15 when the seventh switching transistor Q7 is turned off, thereby cutting off the charging path to the electric load 14. Next, the controller 121 controls the first signal transmitting pin 1213 (cap_a) to output a high level signal, turns off the fifth switching transistor Q5 (PMOS transistor), turns on the fourth switching transistor Q4 (NMOS transistor), and connects the first pole of the fourth switching transistor Q4 to the second terminal of the tank circuit 11. Then, the controller 121 controls the second signal transmitting pin 1214 (cap_d) to output a high level signal, turns on the sixth switching transistor Q6 (NMOS transistor), and in the case where the sixth switching transistor Q6 is turned on, the first switching transistor Q1 (PMOS transistor) and the second switching transistor Q2 (PMOS transistor) are also turned on, so that the second pole of the first switching transistor Q1 is connected to the first pole of the second switching transistor Q2, and the second pole of the second switching transistor Q2 is connected to the first end of the tank circuit 11.
That is, the controller 121 controls the third signal transmitting pin 1215 (VM/EN) to output a low level signal, controls the first signal transmitting pin 1213 (cap_a) to output a high level signal, and the controller 121 controls the second signal transmitting pin 1214 (cap_d) to output a high level signal, as shown in fig. 4b, in which the first switching transistor Q1 (PMOS transistor), the second switching transistor Q2 (PMOS transistor), and the fourth switching transistor Q4 (NMOS transistor) are in an on state, and further charges the tank circuit 11 (e.g., super capacitors (C1, C2) using the power supply 10.
As shown in fig. 4c and fig. 5, when the current electric quantity of the tank circuit 11 is greater than the second under-voltage threshold, the controller 121 may control the power supply 10 and the tank circuit 11 to jointly supply power to the electric load 14, which specifically includes the following steps: first, the controller 121 controls the second signal transmitting pin 1214 (cap_d) to output a low level signal, so that the sixth switching transistor Q6 (NMOS transistor) is turned off, and when the sixth switching transistor Q6 is turned off, the paths of the first switching transistor Q1 and the second switching transistor Q2 for charging the tank circuit 11 (e.g., super capacitor) are turned off, and the positive electrode of the tank circuit 11 is prevented from flowing backward to the positive electrode of the power supply 10; next, the controller 121 controls the first signal transmitting pin 1213 (cap_a) to output a low level signal, turns off the fourth switching transistor Q4, and synchronously turns on the fifth switching transistor Q5, so that the first pole of the fifth switching transistor Q5 is connected to the second end of the tank circuit 11, and the power supply 10 is connected in series to the second end of the super capacitor, thereby forming a discharge preparation state of the super capacitor and the power supply 10 connected in series; then, the third signal transmission pin 1215 (VM/EN) is controlled to output a high level signal, so that the seventh switching transistor Q7 (NMOS transistor) is turned on, and the third switching transistor Q3 (PMOS transistor) is also turned on when the seventh switching transistor Q7 is turned on, so that the third switching transistor Q3 is connected to the first terminal of the tank circuit 11.
That is, when the controller 121 controls the second signal transmission pin 1214 (cap_d) to output a low level signal and the first signal transmission pin 1213 (cap_a) to output a low level signal and the third signal transmission pin 1215 (VM/EN) to output a high level signal, the fifth switching transistor Q5 and the third switching transistor Q3 are turned on, and the energy storage circuit 11 and the power supply 10 are used to charge the user load (motor) together through the enable pin of the voltage conversion circuit 15.
The power state of the super capacitor can be monitored in real time by the signal output by the second signal receiving pin 1212 (cap_det), and when the super capacitor is lower than the preset capacitance standard (for example, lower than 50%), the charging path of the super capacitor and the power supply 10 to the electric load 14 can be closed, and the steps of charging the super capacitor by using the power supply 10 and charging the electric load 14 by using the super capacitor and the power supply 10 together are repeatedly performed. It can be monitored that the power supply 10 has a power lower than the minimum preset value, i.e. the power supply 10 has a power shortage, and the super capacitor cannot be charged, and the electric load 14 is used to enter the standby state. That is, the first signal transmitting pin 1213 (cap_a), the second signal transmitting pin 1214 (cap_d) and the third signal transmitting pin 1215 (VM/EN) are all set to output low-level signals, so that the super capacitor charging and discharging and the voltage converting circuit 15 are all in the power-off sleep state, and the electric load 14 is used to enter the standby state.
In any case of the unused electric load 14, cap_ D, CAP _ A, VM/EN may be set to output a low level signal, and the electric load 14 is used to enter a standby state.
In one embodiment, as shown in fig. 5, the power supply circuit 1 of the smart device further includes a first resistor R1 and a second resistor R2, where the first resistor R1 is connected to the first pole of the sixth switching transistor Q6, and the second resistor R2 is connected to the first pole of the seventh switching transistor Q7.
When the second signal transmitting pin 1214 (cap_d) outputs a low level signal, vgs=0 of the sixth switching transistor Q6 as an NMOS is turned off. When the sixth switching transistor Q6 is turned off, the body diode from the drain to the source of the first switching transistor Q1 can be turned on as the first switching transistor Q1 of the PMOS, and the first resistor R1 can be pulled up by the high level from which the first switching transistor Q1 is turned on. Similarly, when the second signal transmitting pin 1214 (cap_d) outputs a high level signal, the sixth switching transistor Q6 is turned on, and the first resistor R1 is pulled down by the low level of the sixth switching transistor Q6, where Vgs is the voltage from the gate to the source.
The third signal transmission pin 1215 (VM/EN) outputs a low-level signal, the gate voltage of the seventh switching transistor Q7 (NMOS transistor) is low, the seventh switching transistor Q7 is turned off, and at this time, the drain voltage of the seventh switching transistor Q7 is pulled high by the second resistor R2, thereby vgs=0 of the third switching transistor Q3, and the third switching transistor Q3 is turned off, thereby cutting off the main path of the power supply 10 pin of the voltage conversion circuit 15. Similarly, a high signal is output from the third signal transmission pin 1215 (VM/EN), the gate voltage of the seventh switching transistor Q7 (NMOS transistor) is at a high level, the seventh switching transistor Q7 is turned on, the gate voltage of the third switching transistor Q3 is pulled to a low level by the drain of the Q7, vgs < 0, and the third switching transistor Q3 is turned on.
Similarly, in the present embodiment, the control cap_a outputs a high level signal, and the gate voltage of the fifth switching transistor Q5 is high, and vgs=0v of the fifth switching transistor Q5, thereby turning off the fifth switching transistor Q5. Similarly, the control cap_a outputs a high signal, and since the fourth switching transistor Q4 is NMOS, vgs of the fourth switching transistor Q4 is greater than 0V and the fourth switching transistor Q4 is turned on.
Fig. 6 is a schematic structural diagram of a fifth power supply circuit according to an embodiment of the present application; in one embodiment, as shown in fig. 6, the tank circuit 11 may include: the super capacitor comprises a first capacitor C1 and a second capacitor C2, wherein the second end of the first capacitor C1 is connected with the first end of the second capacitor C2, and the first end and the second end of the capacitor can be used for representing the anode and the cathode of the capacitor respectively.
In one embodiment, as shown in fig. 5 or fig. 6, the power supply circuit 1 of the smart device further includes a current limiting circuit 16, where the current limiting circuit 16 is connected to the second terminal of the energy storage circuit 11 and to the first pole of the fourth switching transistor Q4. The current limiting circuit 16 may include at least two resistors, which are charging current limiting resistors of the tank circuit 11 and are in parallel connection, and as shown in fig. 6, the at least two resistors (current limiting circuit 16) include a third resistor R3, a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6, and the third resistor R3, the fourth resistor R4, the fifth resistor R5, and the sixth resistor R6 are connected in parallel. In this embodiment, the current limiting circuit 16 can avoid the power consumption load 14 from being turned off due to too severe voltage fluctuation of the power supply 10 caused by too large charging current drawn by the energy storage circuit 11 when the power supply 10 is low. For example, the power supply 10 is 5V, at least two resistors may be 4 and set to 100 Ω, respectively, and a charging current of 5V may be ensured to be lower than 5V/100 Ω×4=200ma.
In one embodiment, as shown in fig. 5 or fig. 6, the power supply circuit 1 of the smart device further includes a filter circuit 17, and the second pole of the fifth switching transistor Q5 may be connected to the filter circuit 17. The filter circuit 17 is connected to the first signal transmission pin 1213 (cap_a) and to the second pole and gate of the fifth switching transistor Q5. For example, the filter circuit 17 may include a resistor, a capacitor, or the like, and in this embodiment, the structure of the filter circuit 17 is not limited.
In one embodiment, as shown in fig. 6, the power supply circuit may further include a feedback circuit 18, where the feedback circuit 18 may include a resistor, a capacitor, and the like, and in this embodiment, the structure of the feedback circuit is not limited.
Based on the same inventive concept, in one embodiment, as shown in fig. 7, the application further provides a circuit power supply method of an intelligent device, applied to a power supply circuit, the method includes:
s701: and acquiring the current electric quantity of the power supply.
S702: when the current electric quantity of the power supply is larger than the first undervoltage threshold value, the power supply is controlled to be connected with the power utilization load in a conducting mode, so that the power supply supplies power to the power utilization load.
S703: when the current electric quantity of the power supply is smaller than or equal to a first undervoltage threshold value, the power supply is controlled to be disconnected with the power load and connected with the energy storage circuit in a conducting mode, so that the power supply charges the energy storage circuit, and the current electric quantity of the energy storage circuit is obtained in real time.
S704: when the current electric quantity of the energy storage circuit is larger than the second undervoltage threshold value, the energy storage circuit is connected with the electric load in a conducting mode, so that the power supply and the energy storage circuit jointly supply power for the electric load 14.
In this embodiment, when the current electric quantity of the power supply 10 is greater than the first undervoltage threshold, the processing circuit 12 may control the switch circuit 13 to conduct the connection between the power supply 10 and the power consumption load 14, and supply power to the power consumption load 14 through the power supply 10; when the current electric quantity of the power supply 10 is smaller than or equal to a first undervoltage threshold value, the processing circuit 12 can disconnect the power supply 10 from the power utilization load 14 by controlling the switch circuit 13, and conduct the connection between the power supply 10 and the energy storage circuit 11, and charge the energy storage circuit 11 through the power supply 10; when the current electric quantity of the energy storage circuit 11 is greater than the second undervoltage threshold value, the processing circuit 12 can control the switch circuit 13 to conduct the connection between the energy storage circuit 11 and the electric load 14, conduct the connection between the power supply 10 and the electric load 14, and supply power to the electric load 14 through the power supply 10 and the energy storage circuit 11 together. Obviously, in the present embodiment, when the current electric quantity of the power supply 10 is less than or equal to the first undervoltage threshold, the power supply 10 is used to charge the energy storage circuit 11, after the charging is completed, the power supply 10, the energy storage circuit 11 and the power consumption load 14 are connected, and the power consumption load 14 is charged through both the power supply 10 and the energy storage circuit 11, so that the driving force of the power supply 10 is improved, and the endurance of the power consumption load 14 is increased.
In one embodiment, when the current power of the tank circuit 11 is not greater than the third undervoltage threshold, both the control power supply 10 and the tank circuit 11 are disconnected from the power load 14; and controlling the power supply 10 to be connected with the energy storage circuit 11 in a conducting manner, so that the power supply 10 charges the energy storage circuit 11 until the current electric quantity of the power supply 10 is lower than a minimum preset value, wherein the minimum preset value is that the electric quantity of the power supply 10 does not meet the condition of charging the energy storage circuit 11.
The state of charge of the tank circuit 11 may be monitored in real time by the signal output from the second signal receiving pin 1212 (cap_det), and when the tank circuit 11 is lower than the tank circuit preset standard (for example, lower than 50%), the charging path of the tank circuit 11 and the power supply 10 to the power consuming load 14 together may be closed, the step of charging the tank circuit 11 with the power supply 10 and charging the power consuming load 14 through the tank circuit 11 and the power supply 10 together may be repeatedly performed until it is monitored that the power supply 10 is lower than the minimum preset value, that is, the power supply 10 is insufficient, and the tank circuit 11 cannot be charged, and then the power consuming load 14 enters the standby state.
In one embodiment, the application also provides a smart device comprising an electrical load and a power supply circuit 1 of the smart device as above.
In the description of the present specification, reference to the term "some embodiments," "other embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the application, which are described in greater detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be assessed as that of the appended claims.
Claims (10)
1. A power supply circuit for an intelligent device, comprising: the power supply, the energy storage circuit, the processing circuit, the voltage conversion circuit, the current limiting circuit, the filter circuit and the switch circuit are respectively connected with the power supply, the energy storage circuit, the voltage conversion circuit, the current limiting circuit, the filter circuit and the processing circuit;
the switching circuit comprises a first switching module, a second switching module and a third switching module;
The first switch module comprises a first switch transistor, a second switch transistor and a third switch transistor, wherein a first pole of the first switch transistor is connected with the power supply, a second pole of the first switch transistor is connected with a first pole of the second switch transistor, a second pole of the second switch transistor is connected with a first pole of the third switch transistor, a grid electrode of the first switch transistor and a grid electrode of the second switch transistor are connected with a first pole of a sixth switch transistor, and a grid electrode of the third switch transistor is connected with a first pole of a seventh switch transistor;
the second switch module includes: a first switching transistor, a second switching transistor, and a fourth switching transistor; the second pole of the second switching transistor is connected with the first end of the energy storage circuit, the second end of the energy storage circuit is connected with the first end of the current limiting circuit, and the second end of the current limiting circuit is connected with the first pole of the fourth switching transistor;
The third switch module includes: the third switching transistor and the fifth switching transistor, wherein a second pole of the third switching transistor is connected with a first end of the voltage conversion circuit; the second end of the voltage conversion circuit is connected with an electric load; the first pole of the fifth switching transistor is respectively connected with the second end of the energy storage circuit and the first end of the current limiting circuit; the second pole of the fifth switching transistor is connected with the first end of the filter circuit and the power supply; the grid electrode of the fifth switching transistor is connected with the second end of the filter circuit;
The power supply is connected with the power utilization load through the first switch module and the energy storage circuit through the second switch module respectively;
the power supply and the energy storage circuit are connected in series through the third switch module and are connected with the power utilization load;
The processing circuit is respectively connected with the control end of the first switch module, the control end of the second switch module and the control end of the third switch module;
The processing circuit is used for controlling the first switch module to be in an open state when the current electric quantity of the power supply is larger than a first undervoltage threshold value so as to enable the power supply to be connected with an electric load in a conducting way, and the power supply is used for supplying power to the electric load;
The processing circuit is further used for controlling the second switch module to be in an open state when the current electric quantity of the power supply is smaller than or equal to a first undervoltage threshold value, so that the power supply is disconnected from the power utilization load and is connected with the energy storage circuit in a conducting manner, and the power supply charges the energy storage circuit;
the processing circuit is further used for controlling the third switch module to be in an open state when the current electric quantity of the energy storage circuit is larger than a second under-voltage threshold value and the current electric quantity of the power supply is smaller than or equal to a first under-voltage threshold value, so that the energy storage circuit is connected with the power utilization load in a conducting mode, and the power supply and the energy storage circuit supply power for the power utilization load together.
2. The power supply circuit of claim 1, wherein the processing circuit comprises a controller having a first signal receiving pin, a second signal receiving pin, a first signal transmitting pin, a second signal transmitting pin, and a third signal transmitting pin disposed thereon;
The first signal receiving pin is connected with a power supply, and the second signal receiving pin is connected with the energy storage circuit;
The first signal sending pin, the second signal sending pin and the third signal sending pin are respectively connected with each control end of the first switch module, the first signal sending pin, the second signal sending pin and the third signal sending pin are respectively connected with each control end of the second switch module, and the first signal sending pin, the second signal sending pin and the third signal sending pin are respectively connected with each control end of the third switch module.
3. The power supply circuit of claim 1, further comprising a first resistor and a second resistor, a first end of the first resistor being connected to the second pole of the first switching transistor and the first pole of the second switching transistor; a second end of the first resistor is connected with a first pole of the sixth switching transistor, and a gate of the second switching transistor is connected; a first end of the second resistor is connected with a second pole of the second switching transistor and a first pole of the third switching transistor; the second end of the second resistor is connected with the first pole of the seventh switching transistor and the grid electrode of the third switching transistor.
4. The power supply circuit of claim 1, comprising: the current limiting circuit includes at least two resistors connected in parallel.
5. The power supply circuit of claim 1, wherein the tank circuit comprises: the super capacitor comprises a first capacitor and a second capacitor, and the first capacitor and the second capacitor are connected in series.
6. The power supply circuit of claim 1, wherein the power supply is controlled to charge the tank circuit when the current power level of the power supply is less than or equal to a first under-voltage threshold, and wherein the power supply, the tank circuit, and the power load are controlled to be connected after the charging is completed.
7. The power supply circuit of claim 1, wherein the power supply and the tank circuit are controlled to be disconnected from the power load when the current power level of the tank circuit is not greater than a third undervoltage threshold; and controlling the power supply to be connected with the energy storage circuit so as to enable the power supply to charge the energy storage circuit.
8. A power supply method of an intelligent device, characterized by being applied to a power supply circuit according to any one of claims 1-7, the method comprising:
Acquiring the current electric quantity of a power supply;
When the current electric quantity of the power supply is larger than a first undervoltage threshold value, a first switch module in a switch circuit is controlled to be in an open state, so that the power supply is connected with an electric load in a conducting way, and the power supply supplies power to the electric load;
When the current electric quantity of the power supply is smaller than or equal to a first undervoltage threshold value, controlling a second switch module in the switch circuit to be in an open state, so that the power supply is disconnected with the power load and connected with the energy storage circuit in a conducting manner, the power supply charges the energy storage circuit, and the current electric quantity of the energy storage circuit is obtained in real time;
when the current electric quantity of the energy storage circuit is larger than a second undervoltage threshold and the current electric quantity of the power supply is smaller than or equal to a first undervoltage threshold, controlling a third switch module in the switch circuit to be in an open state, so that the power supply and the energy storage circuit are connected with the power utilization load in a conducting manner, and the power supply and the energy storage circuit supply power for the power utilization load together;
The switching circuit comprises a first switching module, a second switching module and a third switching module; the first switch module comprises a first switch transistor, a second switch transistor and a third switch transistor, wherein a first pole of the first switch transistor is connected with the power supply, a second pole of the first switch transistor is connected with a first pole of the second switch transistor, a second pole of the second switch transistor is connected with a first pole of the third switch transistor, a grid electrode of the first switch transistor and a grid electrode of the second switch transistor are connected with a first pole of a sixth switch transistor, and a grid electrode of the third switch transistor is connected with a first pole of a seventh switch transistor;
The second switch module includes: a first switching transistor, a second switching transistor, and a fourth switching transistor; the second pole of the second switching transistor is connected with the first end of the energy storage circuit, the second end of the energy storage circuit is connected with the first end of the current limiting circuit, and the second end of the current limiting circuit is connected with the first pole of the fourth switching transistor;
the third switch module includes: the third switching transistor and the fifth switching transistor, wherein a second pole of the third switching transistor is connected with a first end of the voltage conversion circuit; the second end of the voltage conversion circuit is connected with the electric load; the first pole of the fifth switching transistor is respectively connected with the second end of the energy storage circuit and the first end of the current limiting circuit; the second pole of the fifth switching transistor is connected with the first end of the filter circuit and the power supply; the grid electrode of the fifth switching transistor is connected with the second end of the filter circuit;
The power supply is connected with the power utilization load through the first switch module and the energy storage circuit through the second switch module respectively;
the power supply and the energy storage circuit are connected in series through the third switch module and are connected with the power utilization load;
the processing circuit is respectively connected with the control end of the first switch module, the control end of the second switch module and the control end of the third switch module.
9. The power supply method according to claim 8, characterized by comprising:
when the current electric quantity of the energy storage circuit is not greater than a third undervoltage threshold value, controlling the power supply and the energy storage circuit to be disconnected with the power utilization load; and controlling the power supply to be connected with the energy storage circuit in a conducting way, so that the power supply charges the energy storage circuit until the current electric quantity of the power supply is lower than a minimum preset value, wherein the minimum preset value is that the electric quantity of the power supply does not meet the condition of charging the energy storage circuit.
10. A smart device comprising an electrical load and a power supply circuit of the smart device as claimed in any one of claims 1 to 7.
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| CN215681906U (en) * | 2021-06-08 | 2022-01-28 | 湖南三一智能控制设备有限公司 | Power supply circuit, remote controller and engineering machinery based on power-down protection |
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| CN102118057A (en) * | 2010-01-05 | 2011-07-06 | 台达电子工业股份有限公司 | DC UPS circuit with integrated charge-discharge circuit |
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