CN218678534U - Power supply circuit and electronic equipment - Google Patents
Power supply circuit and electronic equipment Download PDFInfo
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- CN218678534U CN218678534U CN202221668738.1U CN202221668738U CN218678534U CN 218678534 U CN218678534 U CN 218678534U CN 202221668738 U CN202221668738 U CN 202221668738U CN 218678534 U CN218678534 U CN 218678534U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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Abstract
The application provides a power supply circuit and electronic equipment, wherein the power supply circuit controls a first power supply loop which is communicated between a battery and a first electric module through a switching control circuit in a first state that the electric quantity of the battery is greater than an under-voltage point, and the battery supplies power to the first electric module through the switching control circuit; and under a second state that the electric quantity of the battery is less than or equal to the under-voltage point, the switching control circuit controls the first power supply loop to be disconnected, controls the battery to be connected with the emergency energy storage circuit, and controls the emergency energy storage circuit to be connected with the first power supply loop formed between the first power utilization modules. When the battery power is insufficient, the power supply circuit can continue to supply power to the first power module under the condition that an external emergency power supply is not started, and the convenience of use of a user is improved.
Description
Technical Field
The application relates to the technical field of intelligent door locks, in particular to a power supply circuit and electronic equipment.
Background
Generally, when the battery power is low, emergency power supply is required for the smart device. However, emergency power supply needs emergency power source and charging wire, if the user does not carry portable power source or when lacking corresponding charging wire at that time, then still can't in time make smart machine normally work to satisfy user's demand, be unfavorable for the user to smart machine's convenience of use like this.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems existing in the prior art, the power supply circuit and the electronic equipment are provided, wherein the power supply circuit can still continue to supply power to the electronic equipment normally when the electric quantity of a battery is low, so that the convenience of use of a user is improved.
A power supply circuit comprises a switching control circuit and an emergency energy storage circuit, wherein the switching control circuit is used for being connected with a battery, and the emergency energy storage circuit is connected with the switching control circuit and is used for being connected with a first power utilization module;
in a first state that the current electric quantity of the battery is higher than an undervoltage point, the switching control circuit is used for controlling the connection between the battery and the first electric module and the disconnection between the battery and the emergency energy storage circuit, so that the battery and the first electric module form a first power supply loop;
and under a second state that the current electric quantity of the battery is equal to or lower than the under-voltage point, the switching control circuit is used for controlling the disconnection between the battery and the first electric module and the conduction between the battery and the emergency energy storage circuit, so that the battery charges the emergency energy storage circuit by utilizing the current electric quantity, and the emergency energy storage circuit and the first electric module form a second power supply loop.
In some embodiments, the emergency energy storage circuit includes a charging circuit connected to the battery and an energy storage element connected to the charging circuit, and the energy storage element may be selected from at least one of: super capacitor, capacity are less than the lithium cell of setting for the capacity.
In some embodiments, the charging circuit includes a voltage conversion circuit connected between the output of the battery and the energy storage element;
in the second state, the voltage conversion circuit is used for converting the voltage output by the battery into the charging voltage of the energy storage element.
In some embodiments, the switched control circuit is further configured to connect to a second electrical module having a lower power usage than the first electrical module, the battery being connected to the second electrical module;
in the second state, the switching control circuit is used for receiving the password output by the second electric module and judging whether the password is a preset password, and when the password is the preset password, the control circuit is used for controlling the disconnection between the battery and the first electric module and the connection between the battery and the emergency energy storage circuit, so that the battery charges the emergency energy storage circuit by using the current electric quantity, and the emergency energy storage circuit and the first electric module form a second power supply loop.
In some embodiments, the switching control circuit includes a controller, a first switching circuit and a second switching circuit, the first switching circuit being connected between the battery and the first consumer module;
the emergency energy storage circuit is connected with the first power utilization module, and the second switch circuit is connected between the battery and the emergency energy storage circuit; or the emergency energy storage circuit is connected with the battery, and the second switch circuit is connected between the emergency energy storage circuit and the first power utilization module;
the first switch circuit and the second switch circuit are respectively connected with the controller, and the controller is connected with the second electrical module and is used for receiving the password output by the second electrical module in the second state and judging whether the password is the preset password or not;
in the first state, the controller is used for controlling the first switch circuit to be switched on and controlling the second switch circuit to be switched off;
and in the second state, when the password is the threshold password, the controller is used for controlling the first switch circuit to be switched off and controlling the second switch circuit to be switched on.
In some embodiments, the first switching circuit includes a first switch and a second switch connected between the battery and the first consumer module, and a third switch connected to the controller;
the switch control end of the second switch is connected with the switch control end of the first switch, the three ends of the third switch are respectively connected with the output end of the controller, the switch control end of the first switch and the electrode ground, the first switch and the second switch are connected in series in an opposite direction to form a first disconnecting switch, and the first disconnecting switch is connected between the battery and the first electric module; and/or the presence of a gas in the gas,
the second switch circuit comprises a fourth switch, a fifth switch and a sixth switch, the fourth switch is connected with the controller, the switch control end of the fifth switch is connected with the switch control end of the fourth switch, the three ends of the sixth switch are respectively connected with the output end of the controller, the switch control end of the fourth switch and the electrode ground, the fourth switch and the fifth switch are reversely connected in series to form a second cut-off switch, and the second cut-off switch is connected between the emergency energy storage circuit and the battery or between the emergency energy storage circuit and the first electric module.
In some embodiments, a first filter circuit is connected to an input of the first cut-off switch, and a second filter circuit is connected to an output of the first cut-off switch;
and the input end of the second cut-off switch is connected with a third filter circuit, and the output end of the second cut-off switch is connected with a fourth filter circuit.
In some embodiments, the switching control circuit further comprises a detection circuit connected between the controller and the battery;
the detection circuit is used for detecting the current electric quantity of the battery and sending the current electric quantity to the controller, and the controller determines that the battery is in the first state or the second state according to the current electric quantity.
An electronic device comprising the power supply circuit of any of the above embodiments.
In some embodiments, the electronic device further comprises a door lock motor and a door lock panel;
the power supply circuit comprises a battery, a switching control circuit connected with the battery and an emergency energy storage circuit connected with the switching control circuit, the switching control circuit is connected with the door lock motor, and the battery is connected with the door lock panel;
in a first state that the current electric quantity of the battery is higher than an undervoltage point, the switching control circuit is used for controlling the connection between the battery and the door lock motor and the disconnection between the battery and the emergency energy storage circuit, so that the battery, the door lock motor and the door lock panel form a first power supply loop, and the battery supplies power to the door lock motor and the door lock panel;
under the second state that the current electric quantity of battery is equal to or less than under-voltage point, switching control circuit is used for receiving the password of second electric module output to judge whether the password is preset password, if the password is preset password, switching control circuit is used for controlling break-off between battery and the first electric module, and with switch on between the emergent energy storage circuit, so that the battery utilizes current electric quantity to emergent energy storage circuit charges, and makes emergent energy storage circuit with the lock motor forms second power supply circuit.
As can be seen from the above, according to the power supply circuit provided in the present application, in a first state where the electric quantity of the battery is greater than the under-voltage point, the switching control circuit controls the battery and the first power module to form a first power supply loop, and the battery supplies power to the first power module via the switching control circuit; and under a second state that the electric quantity of the battery is less than or equal to the under-voltage point, the switching control circuit controls the first power supply loop to be disconnected, controls the battery to be connected with the emergency energy storage circuit, and controls the emergency energy storage circuit to be connected with the first power supply loop formed between the first power utilization modules. When the battery power is insufficient, the power supply circuit can continue to supply power to the first electric module under the condition that an external emergency power supply is not started, and the use convenience of a user is improved.
Drawings
Fig. 1 is a schematic diagram of a power supply circuit according to some embodiments of the present application;
fig. 2 is a schematic diagram of a power supply circuit according to some embodiments of the present application;
fig. 3 is a schematic circuit diagram illustrating an exemplary emergency tank circuit in a power supply circuit according to some embodiments of the present disclosure;
fig. 4 is a circuit diagram illustrating a specific configuration of a first switch circuit in a power supply circuit according to some embodiments of the present disclosure;
fig. 5 is a circuit diagram illustrating a second switch circuit in a power supply circuit according to some embodiments of the present disclosure;
FIG. 6 is a schematic diagram of a power supply circuit according to some embodiments of the present disclosure;
FIG. 7 is a schematic diagram of a power supply circuit according to some embodiments of the present disclosure;
fig. 8 is a schematic flowchart of a power supply circuit applied to an intelligent door lock according to some embodiments of the present disclosure, wherein the power supply circuit executes a power supply task when the intelligent door lock is in a pressed state.
Detailed Description
The technical solution of the present application is further described in detail with reference to the drawings and specific embodiments.
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 present application is for the purpose of describing particular embodiments only and is not intended to be limiting of implementations of the present application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the present application, it is to be noted that the terms "connected" and "connected," unless otherwise specifically stated or limited, are to be construed broadly, e.g., as meaning directly connected to one another, indirectly connected through an intermediary, and communicating between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate. In addition, in the present application, receiving a certain signal may be directly receiving the signal, or may refer to receiving a signal obtained after amplifying or reducing the signal, and in the present application, after amplifying or reducing a signal, the representation of the signal is not changed, for example, a signal obtained after amplifying an analog audio signal is still referred to as an analog audio signal, and a signal obtained after amplifying an equalized analog audio signal is still referred to as an equalized analog audio signal.
Fig. 1 is a schematic diagram of a power supply circuit according to some embodiments of the present disclosure. The power supply circuit can be arranged in the intelligent door lock, and can also be arranged in other electronic equipment, such as intelligent electronic equipment. The power supply circuit supplies power to the power utilization module in the electronic equipment. The power consumption module of consumer can divide into different power consumption modules according to the difference of power consumption power, if can divide into lock motor and lock panel to its power consumption module of intelligence lock, lock panel is lower for the lock motor, power consumption power.
Referring to fig. 1, in some embodiments, the power supply circuit provided in the present application includes a switching control circuit 2 for connecting a battery 1 and an emergency energy storage circuit 3 connected to the switching control circuit 2. The switching control circuit 2 is used for being connected with the first electric module 4, and the emergency energy storage circuit 3 is connected with the first electric module 4 through the switching control circuit 2. In a first state that the electric quantity of the battery 1 is higher than the undervoltage point, the switching control circuit 2 is used for controlling the connection between the battery 1 and the first electric module 4 and the disconnection between the battery 1 and the emergency energy storage circuit 3, so that the battery 1 and the first electric module 4 are connected to form a first power supply loop. And in a second state that the electric quantity of the battery 1 is equal to or lower than the under-voltage point, the switching control circuit 2 is used for controlling the disconnection between the battery 1 and the first electric module 4 and the connection between the battery 1 and the emergency energy storage circuit 3, and the battery 1 is communicated with the first electric module 4 through the switching control circuit 2 and the emergency energy storage circuit 3, so that the battery 1 charges the emergency energy storage circuit 3 by using the current electric quantity, and the emergency energy storage circuit 3 forms a second power supply loop with the first electric module 4 after the charging is completed. It should be noted that the switching control circuit 2 is used to control the on/off of each power supply loop and each subsequent switch circuit, and may be implemented based on an existing switch control signal generation circuit.
In some embodiments, the under-voltage point refers to a value corresponding to the current electric quantity of the battery 1 when the current electric quantity of the battery 1 can meet the power consumption required by the first electric module 4 to perform the corresponding function, and when the current electric quantity of the battery 1 is higher than the under-voltage point, it indicates that the current electric quantity of the battery 1 can also meet the power consumption requirement of the first electric module 4, and indicates that the battery 1 can form a first power supply loop with the first electric module 4, that is, the battery 1 directly supplies power to the first electric module, so that the first electric module 4 is in a normal working state to perform the corresponding function. When the current voltage of the battery 1 is smaller than the under-voltage point, the loaded capacity of the battery 1 cannot meet the power consumption requirement of the first power module, that is, the battery 1 cannot provide a normal working voltage for the first power module through the first power supply loop. For example, the first power utilization module 4 may be a door lock motor in the intelligent door lock, and since the power consumption of the first power utilization module is generally higher than that of a door lock panel, when the current power consumption of the battery 1 is greater than an undervoltage point, the current power consumption of the battery 1 may meet the power consumption requirement of the door lock motor, and the battery 1 may form a first power supply loop with the door lock motor, so that the battery 1 supplies power to the door lock motor, and the door lock motor performs an unlocking action. And when the current electric quantity of the battery 1 is smaller than the under-voltage point, the current electric quantity of the battery 1 can still supply power to the door lock panel, but the power consumption power requirement of the door lock motor cannot be met, namely the current electric quantity of the battery 1 cannot directly drive the door lock motor to normally work. According to the power supply circuit provided by the embodiment of the application, in the first state that the current electric quantity of the battery 1 is greater than the under-voltage point, the switching control circuit controls the conduction of the first power supply loop between the battery 2 and the first electric module 4, and the battery 1 can directly supply power to the first electric module 4 through the first power supply loop, so that the first electric module is in a normal state to execute a corresponding function; in a second state that the current electric quantity of the battery 1 is smaller than the under-voltage point, that is, when the current electric quantity of the battery 1 meets the power consumption requirement of the first electric module 4, the switching control circuit 2 controls the first power supply circuit between the battery 1 and the first electric module 4 to be disconnected, and the charging circuit between the battery 1 and the emergency energy storage circuit 3 to be connected, so that the battery 1 firstly charges the emergency energy storage circuit 3 by using the current electric quantity smaller than the under-voltage point, and after the charging of the emergency energy storage circuit 3 is completed, the switching control circuit 2 controls the second power supply circuit between the emergency energy storage circuit 3 and the first electric module 4 to be connected. Because the emergency energy storage circuit has a larger load carrying capacity compared with the battery 1 of which the current electric quantity is smaller than the under-voltage point after the charging is completed, the emergency energy storage circuit 3 can provide a normal power supply voltage for the first electric module 4 through the second power supply loop, so that the first electric module can continue to work normally when the current electric quantity of the battery 1 is smaller than the under-voltage point, and corresponding functions are executed. The power consumption of the power consumption module is the power required by the power consumption module in a normal working state to execute the corresponding function, for example, for an intelligent door lock, the first power consumption module 4 is a door lock motor, and the power consumption of the door lock motor is the power required by the door lock motor to execute an unlocking action.
In addition, during the period that the first power supply loop is in a conducting state, namely during the first state, the switching control circuit 2 controls the battery 1 and the emergency energy storage circuit 3 to be disconnected, and controls the emergency energy storage circuit 3 and the first electric module 4 to be disconnected, the battery 1 does not charge the emergency energy storage circuit 3, the emergency energy storage circuit 3 does not supply power to the first electric module 4, but the battery 1 supplies power to the first electric module 4 through the first power supply loop, so that the electric quantity loss in the emergency energy storage circuit 3 can be avoided, and the electric energy is saved.
In some embodiments, in the second state, the charge of the battery 1 is smaller than the under-voltage point and larger than a required supply voltage of a second electrical module in the electronic device. The power consumption of the second electric module is smaller than that of the first electric module in the electronic equipment. For example, the electronic device is an intelligent door lock, the first electrical module is a door lock motor, and the second electrical module is a door lock panel. Obviously, in the second state, although the current electric quantity of the battery 1 cannot meet the electric power demand of the first electric module 4 for executing the corresponding function, that is, the current load capacity of the battery 1 cannot drive the first electric module 4 to normally work, if the current electric quantity cannot meet the electric power consumption required by the door lock motor for executing the unlocking rotation action, the current electric quantity of the battery 1 can still normally supply power to the second electric module, and the current load capacity of the battery 1 can directly provide power supply voltage for the second electric module so as to drive the second electric module to normally work. Therefore, in the second state, the third power supply loop between the battery 1 and the second electrical module is still in a conducting state, and the battery 1 supplies power to the second electrical module through the third power supply loop. Therefore, in the second state, the second photovoltaic module can still work normally. If the second electrical module is taken as the door lock panel as an example, the door lock panel can still obtain the unlocking instruction in the second state, after the user inputs the correct unlocking password through the password input area on the door lock panel, the switching control circuit 2 controls the first power supply circuit between the battery 1 and the door lock motor 4 to be disconnected and controls the charging circuit between the battery 1 and the emergency energy storage circuit 3 to be connected, the battery 1 firstly charges the emergency energy storage circuit 3 through the charging circuit, and after the charging is completed, the switching control circuit 2 controls the second power supply circuit between the emergency energy storage circuit 3 and the door lock motor (the first electrical module) to be connected so as to supply power to the door lock motor through the second power supply circuit and drive the door lock motor to execute the unlocking rotation.
As can be seen from the above, according to the power supply circuit provided in the embodiment of the present application, in the first state where the electric quantity of the battery is greater than the under-voltage point, the switching control circuit controls the battery and the first electric module to form a conductive first power supply loop, and the battery supplies power to the first electric module through the switching control circuit; and under a second state that the electric quantity of the battery is less than or equal to the under-voltage point, the switching control circuit controls the first power supply loop to be disconnected, controls the battery to be connected with the emergency energy storage circuit, and controls the emergency energy storage circuit to be connected with the first power supply loop formed between the first power utilization modules. When the battery power is insufficient, the power supply circuit can continue to supply power to the first electric module under the condition that an external emergency power supply is not started, and the use convenience of a user is improved.
Specifically, referring to fig. 1, when the power supply circuit provided in the embodiment of the present disclosure is connected to the battery 1 and the first electric module 4, the battery 1 is connected to the emergency energy storage circuit 3, output ends of the battery 1 and the emergency energy storage circuit 3 are respectively connected to a first input end and a second input end of the switching control circuit 2, an output end of the switching control circuit 2 is connected to the first electric module 4, and the switching control circuit 2 selects one of the first input end and the second input end to be electrically connected to the first electric module 4. However, in other embodiments, the battery 1 may also be connected to the first electric module 4 and the emergency energy storage circuit 3 through the switching control circuit 2, that is, the output end of the battery 1 is connected to the input of the switching circuit 2, the first output end of the switching control circuit 2 is connected to the door lock motor 4, the second output end of the switching control circuit 2 is connected to the input end of the emergency energy storage circuit 3, the output end of the emergency energy storage circuit 3 is connected to the door lock motor 4, and the switching control circuit 2 is configured to select one of the emergency energy storage circuit 3 and the first electric module 4 to be electrically connected to the output end of the battery 1 according to the current electric quantity of the battery 1, so as to form a corresponding power supply loop.
Referring to fig. 2, in the power supply circuit provided according to some embodiments of the present application, the emergency energy storage circuit 3 includes a charging circuit 31 connected to the battery 1 and an energy storage element 32 connected to the charging circuit 31. In the first state, the switching control circuit 2 controls the charging circuit 31 to be disconnected to disconnect the electrical connection between the battery 1 and the energy storage element 32, and the battery 1 does not charge the energy storage element 32 in the first state. In the second state, the switching control circuit 2 controls the charging circuit 31 to be turned on, the current electric quantity of the battery 1 charges the energy storage element 32 through the charging circuit 31, after the energy storage element 32 is charged, the switching control circuit 2 controls the energy storage element 32 to be electrically connected with the first electric module 4, and the electric quantity released by the energy storage element 32 supplies power to the first electric module 4. In some embodiments, the energy storage element 32 may be a capacitor having a capacitance value greater than a predetermined value, such as a super capacitor. In other embodiments, the energy storage element 32 may also be a rechargeable battery with a capacity less than a predetermined value, such as a lithium battery.
In some embodiments, the aforementioned charging circuit 31 comprises a voltage conversion circuit for connecting between the output of the battery 1 and the energy storage element 32. In the second state, the voltage conversion circuit is used to convert the voltage output by the battery 1 into the charging voltage of the energy storage element 32.
Specifically, please refer to fig. 3, which is a schematic circuit diagram of an embodiment of the emergency tank circuit 3. In fig. 3, the energy storage element 32 is exemplified by a super capacitor C1, and the charging circuit 31 is connected between the output voltage V _ BAT terminal of the battery 1 and the super capacitor C1. In fig. 3, the voltage conversion circuit of the charging circuit 31 includes a voltage conversion chip Udc for converting the output voltage V _ BAT of the battery 1 into a charging voltage suitable for charging the super capacitor C1. In some embodiments, the voltage conversion chip Udc may be a DC-to-DC BUCK type voltage conversion chip (BUCK type DC-DC conversion chip). The voltage conversion circuit in the charging circuit 31 further includes peripheral devices located at the periphery of the voltage conversion chip Udc. Referring to fig. 3, the peripheral device includes an inductor L1 connected between the voltage conversion chip Udc and the super capacitor C1. The voltage input terminals VIN and V _ BAT of the voltage conversion chip Ucd are used for receiving the output voltage V _ BAT of the battery 1. The voltage conversion chip Ucd further includes an enable terminal EN, a ground terminal GND, a charging current feedback terminal FB and a switch node terminal LX. The main power switch of the voltage conversion chip Udc is electrically connected to the first terminal of the inductor L1 via the switch node terminal LX. The second end of the inductor L1 is connected with the first end of the super capacitor C1, and the second end of the super capacitor C1 is grounded through the resistor R1. The resistor R1 is used for feeding back the charging current of the super capacitor C1 to the voltage conversion chip Udc, and the voltage conversion chip Udc controls the charging current for charging the super capacitor C1 according to the charging current fed back by the charging current feedback end FB.
As shown in fig. 3, in some embodiments, the emergency energy storage circuit 3 further includes an input filter circuit connected to the output terminal V _ BAT of the battery 1 for filtering the voltage input to the energy storage emergency circuit, and the input filter circuit includes a capacitor C2 connected between the output terminal V _ BAT of the battery 1 and the ground terminal. In some embodiments, the emergency tank circuit 3 further includes an output filter circuit connected to the output terminal V _ BAT of the battery for filtering the output voltage of the emergency tank circuit, and the output filter circuit includes a capacitor C3 connected between the output terminal V _ BAT of the battery and the ground terminal.
As shown in fig. 2, in some embodiments, the switching control circuit 2 includes a controller 21, a first switch circuit 22 and a second switch circuit 23, and the first switch circuit 22 is connected between the battery 1 and the first consumer module 4. The emergency energy storage circuit 3 is connected with the first electric module 4, and the second switch circuit 22 is connected between the battery 1 and the emergency energy storage circuit 3, or the emergency energy storage circuit 3 is connected with the battery 1, and the second switch circuit 23 is connected between the emergency energy storage circuit 3 and the first electric module 4. The first switch circuit 22 and the second switch circuit 23 are respectively connected to the controller 21, and the controller 21 controls the first switch circuit 22 to be turned on and controls the second switch circuit 23 to be turned off in a first state. The controller 21 controls the first switch circuit 22 to be turned off and the second switch circuit 23 to be turned on in the second state. The first switch circuit 22 and the second switch circuit 23 each include a switch. The controller 21 controls the on and off of the corresponding switch of the first switch circuit 22 and the second switch circuit 23 to control the on and off of the corresponding switch circuit.
In some embodiments, the first enable terminal of the first switch circuit 22 and the second enable terminal of the second switch circuit 22 are respectively connected to the control terminal of the controller 21, in the first state, the controller 21 outputs a first control signal through the control terminal, the first switch circuit 22 is controlled to be turned on according to the first control signal, and the second switch circuit 23 is controlled to be turned off according to the first control signal. In the second state, the controller 21 outputs a second control signal through the control terminal, the first switch circuit 22 is controlled to be turned off according to the second control signal, and the second switch circuit 23 is controlled to be turned on according to the second control signal. In this embodiment, the first enable terminal and the second enable terminal refer to corresponding terminals for receiving corresponding enable signals to control the first switch circuit 22 and the second switch circuit 23 to be correspondingly turned on or off. In this embodiment, the control signals output by the controller 21 in the first state and the second state are different, and are respectively a first control signal and a second control signal. In the first state, the enable signals received by the first switch circuit 22 and the second switch circuit 23 are all the first control signals, and the first control signals control the on-off states of the first switch circuit 22 and the second switch circuit 23 to be opposite. Therefore, one of the first switch circuit 22 and the second switch circuit 23 includes a switch that is turned on at a high level, and the other includes a switch that is turned on at a low level. In the second state, the enable signals received by the first switch circuit 22 and the second switch circuit 23 are both the second control signal, and the second control signal controls the on-off states of the first switch circuit 22 and the second switch circuit 23 to be opposite. Therefore, one of the first switch circuit 22 and the second switch circuit 23 includes a switch that is turned on at a high level, and the other includes a switch that is turned on at a low level.
In some embodiments, the first enable terminal of the first switch circuit 22 is connected to the first control terminal of the controller 21, and the second enable terminal of the second switch circuit 23 is connected to the second control terminal of the controller 21. In the first state, the controller 21 outputs a first control signal through the first control terminal, the second control terminal outputs a second control signal, the first switch circuit 22 is turned on according to the first control signal, the second switch circuit 23 is turned off according to the second control signal, in the second state, the controller 21 outputs the second control signal through the first control terminal, the second control terminal outputs the first control signal, the first switch circuit 22 is turned off according to the second control signal, and the second switch circuit 23 is turned on according to the first control signal. In this embodiment, the enable signal of the switch circuit is the same as that in the previous embodiment. The controller 21 outputs two control signals for controlling the first switch circuit 22 and the second switch circuit 23, which are the first control signal and the second control signal, respectively. The first control signal and the second control signal have different level values in the first state and the second state.
Referring to fig. 4, in some embodiments, the first switch circuit 22 includes: a first switch Q1 and a second switch Q2 for connecting between the output terminal of the battery 1 and the door lock motor, and a third switch Q3 connected to a controller 21 (the battery, the door lock motor, and the controller are not shown in fig. 4). The three terminals of the third switch Q3 are respectively connected to the output terminal (also called control terminal) of the controller, the control terminal (also called enable terminal) of the first switch Q1, and the electrode ground. The first switch Q1 and the second switch Q2 are connected in series in opposite directions to form a first cut-off switch, and the first cut-off switch is connected between the battery 1 and the first electrical module 4, that is, one end of the first cut-off switch receives the voltage of the output terminal V _ BAT of the battery, and the other end of the first cut-off switch provides the supply voltage V _ Motor to the first electrical module 4. An output terminal of the third switch Q3 is connected to an output terminal (also referred to as a control terminal) of the controller 21, and is configured to receive the first control signal V _ BAT _ CTL output by the controller 21. In the first state, the third switch Q3 is controlled to be turned on by the first control signal V _ BAT _ CTL, the third switch Q3 pulls the potentials of the control terminal of the first switch Q1 and the control terminal of the second switch Q2 to the electrode ground potential, the first switch Q1 and the second switch Q2 are both in the on state, the first switch circuit is in the on state, and the battery 1 supplies power to the first power module through the first switch circuit 22.
As shown in fig. 4, the first switch circuit 22 further includes a resistor R2 connected between the first on/off terminal of the first switch Q1 and the control terminal of the first switch Q1, and the second on/off terminal of the first switch Q1 is connected to the first on/off terminal of the second switch Q2. The second on-off end of the second switch Q2 is electrically connected with the first electric module 4, the control end of the second switch Q2 and the control end of the first switch Q1 are both connected with the first on-off end of the third switch Q3, and the second on-off end of the third switch Q3 is connected with the electrode ground. The first switch circuit 22 further includes a resistor R3 connected between the output terminal of the controller 21 and the control terminal of the third switch Q3, and a resistor R4 connected between the control terminal of the third switch Q3 and the second turn-off terminal. In this embodiment, the first switch Q1 and the second switch Q2 are connected in reverse series, that is, the substrate diodes of the first switch Q1 and the second switch Q2 are connected in reverse series. The first switch Q1 and the second switch Q2 are both MOS switches or other types of transistors. The third switch Q3 is a transistor or other type of transistor. For a MOS switch, the control terminal is the gate terminal, one of the first and second on/off terminals is the source terminal, and the other is the drain terminal. For a triode, the control terminal is the base terminal, the first on-off terminal is one of the collector and the emitter, and the second on-off terminal is one of the collector and the emitter.
In some embodiments, a first filter circuit is connected to an input of the first cut-off switch, and a second filter circuit is connected to an output of the first cut-off switch. The first filter circuit of the first cut-off switch comprises capacitors C4 and C5 connected in parallel between the output of the battery 1 and the electrode ground, and the second filter circuit of the first cut-off switch comprises capacitors C6 and C7 connected in parallel between the first consumer module 4 and the electrode ground.
Referring to fig. 5, in some embodiments, the second switch circuit 23 includes: a fourth switch Q4 and a fifth switch Q5 connected between the voltage output terminal (V _ CAP) of the energy storage element 32 and the first electrical module, and a sixth switch Q6 connected to the controller 21 (the battery, the door lock motor and the controller are not shown in fig. 5). The third terminal of the sixth switch Q6 is connected to the output terminal (also referred to as the control terminal) of the controller 21, the on control terminal (also referred to as the enable terminal) of the fourth switch Q4, and the electrode ground, respectively. The fourth switch Q4 and the fifth switch Q5 are connected in series in an opposite direction to form a second cut-off switch, and the second cut-off switch is connected between the energy storage element 32 and the first electrical module 4, that is, one end of the second cut-off switch receives the energy storage voltage V _ CAT, and the other end of the second cut-off switch provides the power supply voltage V _ Motor for the first electrical module. A control terminal of the sixth switch Q6 is connected to the output terminal of the controller 21, and is configured to receive the second control signal V _ CAP _ CTL output by the controller 21. In the first state, the second control signal V _ CAP _ CTL controls the sixth switch Q6 to be turned on. The sixth switch Q6 pulls the potentials of the control end of the fourth switch Q4 and the control end of the fifth switch Q5 to the electrode ground potential, so that the fourth switch Q4 and the fifth switch Q5 are both in a conducting state, the second switch circuit 23 is in a conducting state, and the energy storage element 32 supplies power to the first electric module 4 through the second switch circuit 23.
As shown in fig. 5, the second switch circuit further includes a resistor R5 connected between the first on/off terminal of the fourth switch Q4 and the control terminal of the fourth switch Q4, and the second on/off terminal of the fourth switch Q4 is connected to the first on/off terminal of the fifth switch Q5. A second on-off end of the fifth switch Q5 is electrically connected with the first power module 4, a control end of the fifth switch Q5 and a control end of the fourth switch Q4 are both connected with a first on-off end of the sixth switch Q6, and a second on-off end of the sixth switch Q6 is connected with the electrode ground. The second switching circuit 23 further includes a resistor R6 connected between the output terminal of the controller 21 and the control terminal of the sixth switch Q6, and a resistor R7 connected between the control terminal of the sixth switch Q6 and the second turn-on terminal. In the present embodiment, the fourth switch Q4 and the fifth switch Q5 are connected in reverse series, that is, the substrate diodes of the fourth switch Q4 and the fifth switch Q5 are connected in reverse series. The fourth switch Q4 and the fifth switch Q5 are MOS switches or other types of transistors. The sixth switch Q6 is a transistor or other type of transistor. For a MOS switch, the control terminal is the gate terminal, one of the first and second on/off terminals is the source terminal, and the other is the drain terminal. For a triode, the control terminal is the base terminal, the first on-off terminal is one of the collector and the emitter, and the second on-off terminal is one of the collector and the emitter.
In some embodiments, a third filter circuit is connected to an input of the second cut-off switch, and a fourth filter circuit is connected to an output of the second cut-off switch. The third filter circuit of the second section switch comprises capacitors C8 and C9 connected in parallel between the output of the energy storage element 32 and the electrode ground. The fourth filter circuit of the second section switch comprises capacitors C10 and C11 connected in parallel between the first electrical module 4 and the electrode ground. The control terminals of the third switch Q3 and the sixth switch Q6 are corresponding enable control terminals, and are configured to receive the first control signal or the second control signal.
Referring to fig. 6, the switching control circuit 2 further includes a detection circuit 24 for connecting between the controller 21 and the battery 1. The detection circuit 24 is configured to detect a current electric quantity of the battery 1 and send the current electric quantity to the controller 21, and the controller 21 determines that the battery 1 is in the first state or the second state according to the current electric quantity of the battery 1.
In some embodiments, please refer to fig. 7, in an electronic device to which the power supply circuit according to the embodiment of the present application is applied, the power utilization module further includes a second power utilization module 5 in addition to the first power utilization module 4. The electrical power consumption of the second electrical module 5 is less than the electrical power consumption of the first electrical module 4. If the electronic device is an intelligent door lock, the first power utilization module 4 may be a door lock motor, and the second power utilization module 5 may be a door lock panel. In the present embodiment, the switching control circuit 2 is also used to connect with the second electrical module 5, and the battery 1 is also connected with the second electrical module. In a second state, the switching control circuit 2 is configured to receive a password output by the second electrical module, determine whether the output password is a preset password, and when the output password is the preset password, the switching control circuit 2 is configured to control the battery 1 to be disconnected from the first electrical module 4 and to be connected to the emergency energy storage circuit 3, so that the battery 1 charges the emergency energy storage circuit 3 by using the current electric quantity, and after the emergency energy storage circuit 3 is charged, the emergency energy storage circuit 3 and the first electrical module 4 form a second power supply loop, so that the emergency energy storage circuit 3 supplies power to the first electrical module. In this embodiment, the controller 21 in the switching control circuit 2 is connected to the second electrical module 5, and is configured to receive the password output by the second electrical module 5 in the second state, and determine whether the output password is the preset password. It should be noted that, the controller 21 may determine whether the output password is the preset password based on a conventional hardware circuit or based on existing recognition software (such as fingerprint recognition or face recognition), and will not be described in detail here.
Taking an electronic device as an intelligent door lock as an example, if the second electrical module 5 is a door lock panel, the controller 21 is connected to the door lock panel, and the battery 1 is connected to the door lock panel 5. The battery 1 charges the emergency energy storage circuit 32 with the current electric quantity under the execution condition that the controller 21 receives the password input on the door lock panel 5 and judges that the password is the preset password. The input password can be obtained by key input on a door lock panel, and can also be obtained by a human face input or fingerprint input mode.
In addition, the embodiment of the application also provides an electronic device, and the power supply circuit is provided according to any embodiment of the application. According to the embodiment of the present application, the electronic device and the power supply circuit have corresponding effects, which will not be described herein again.
Further, in some embodiments, the electronic device provided according to the present application is an intelligent door lock, which includes a door lock motor and a door lock panel. The door lock motor is the first electrical module in the above embodiments, and the door lock panel is the second electrical module in the above embodiments. In this embodiment, the power supply circuit includes the battery, with the switching control circuit that the battery is connected and with the emergent tank circuit that switching control circuit connects, switching control circuit with the lock motor is connected, the battery with the lock panel is connected. Under the first state that the current electric quantity of battery is higher than the undervoltage point, switching control circuit is used for control the battery with switch on between the lock motor, and with break off between the emergent energy storage circuit, so that the battery with the lock motor and the lock panel forms first power supply return circuit, makes the battery does lock motor and lock panel power supply. Under the second state that the current electric quantity of battery is equal to or less than under-voltage point, switching control circuit is used for receiving the password of second electric module output to judge whether the password is preset password, if the password is preset password, switching control circuit is used for controlling break-off between battery and the first electric module, and with switch on between the emergent energy storage circuit, so that the battery utilizes current electric quantity to emergent energy storage circuit charges, and makes emergent energy storage circuit with the lock motor forms second power supply circuit.
Please refer to fig. 8, which is a schematic diagram illustrating a process of the power supply circuit executing a power supply task when the power supply circuit is applied to the intelligent door lock in the under-voltage state of the battery of the intelligent door lock according to the present application, where the process of the power supply circuit executing the power supply task in the second under-voltage state of the battery of the power supply circuit in the intelligent door lock includes steps S1 to S5 (where the sequence of steps S1 to S5 is not limited), which are specifically as follows:
s1: the battery enters an under-voltage state. The controller in the switching control circuit acquires the battery power detection signal to determine a second state when the battery power is less than or equal to the under-voltage point according to the power detection signal.
S2: and judging whether an unlocking instruction exists or not. And judging whether the controller receives an unlocking instruction represented by a mode of inputting a password or face recognition and the like of the door lock panel at present, judging whether the unlocking instruction is correct, if so, executing S3, and if not, returning to S2 to continuously obtain the unlocking instruction.
S3: the first power supply loop is disconnected. And the switching control circuit controls the first power supply loop to be disconnected according to the battery under-voltage state and a correct unlocking instruction.
S4: and charging the emergency energy storage circuit. And after the first power supply loop is disconnected, controlling the battery to charge the emergency energy storage circuit.
S5: and conducting the second power supply loop. After the emergency energy storage circuit finishes charging, the switching control circuit controls the second power supply loop to be conducted, and the emergency energy storage circuit supplies power to the door lock motor.
When the battery power consumption of the intelligent door lock reaches the second state smaller than the under-voltage point, because the working current of the motor of the door lock is large, the power is large, the motor is started, the output voltage of the battery can be obviously reduced, and the circuit system of the door lock is halted, so the intelligent door lock limits the work of the motor, but the current required by the panel work of the door lock is small, the power supply connection between the battery and the door lock panel is also connected, and the door lock panel can normally work (can normally perform operations such as fingerprint identification and digital password identification). This application utilizes the current electric quantity of battery utilization of under-voltage state to give energy storage component charges, because energy storage component's output capacity is stronger, can satisfy drive lock motor work one to twice demand to need not to unblank with the help of outside emergency power supply or carry out mechanical key under the battery under-voltage state.
In addition, because the leakage current of the energy storage element in the energy storage circuit is generally larger, in order to save electricity, when the voltage of the door lock battery is too low and the door lock motor cannot be driven, the door lock cannot be unlocked, the panel is wakened up through touch, a preset emergency unlocking password is input, after the password is correct, the energy storage circuit is charged and fully charged (the charging time is about 1-2 seconds), and electric quantity is provided for the door lock motor to unlock the door lock. Under normal conditions, the battery does not charge the super capacitor. The lock power supply circuit is in when battery power is not enough, need not to launch outside emergency power source and carry out emergent power supply and unblank or launch mechanical key and unblank, can make intelligent lock carry out the action of unblanking according to the password of unblanking immediately, user experience feels the preferred.
Claims (10)
1. A power supply circuit is characterized by comprising a switching control circuit and an emergency energy storage circuit, wherein the switching control circuit is used for being connected with a battery, and the emergency energy storage circuit is connected with the switching control circuit and is used for being connected with a first electric module;
in a first state that the current electric quantity of the battery is higher than an undervoltage point, the switching control circuit is used for controlling the connection between the battery and the first electric module and the disconnection between the battery and the emergency energy storage circuit, so that the battery and the first electric module form a first power supply loop;
and under a second state that the current electric quantity of the battery is equal to or lower than the under-voltage point, the switching control circuit is used for controlling the disconnection between the battery and the first electric module and the conduction between the battery and the emergency energy storage circuit, so that the battery charges the emergency energy storage circuit by utilizing the current electric quantity, and the emergency energy storage circuit and the first electric module form a second power supply loop.
2. The power supply circuit of claim 1, wherein the emergency energy storage circuit comprises a charging circuit for connection to the battery and an energy storage element connected to the charging circuit, wherein the energy storage element is selected from at least one of: super capacitor, capacity are less than the lithium cell of setting for the capacity.
3. The power supply circuit of claim 2, wherein the charging circuit comprises a voltage conversion circuit for connecting between the output terminal of the battery and the energy storage element;
in the second state, the voltage conversion circuit is used for converting the voltage output by the battery into the charging voltage of the energy storage element.
4. A power supply circuit according to any one of claims 1-3, wherein the switched control circuit is further configured to connect to a second electrical module having a lower power usage than the first electrical module, and the battery is connected to the second electrical module.
5. The power supply circuit of claim 4, wherein the switching control circuit comprises a controller, a first switching circuit and a second switching circuit, the first switching circuit being connected between the battery and the first consumer module;
the emergency energy storage circuit is connected with the first electric module, and the second switch circuit is connected between the battery and the emergency energy storage circuit; or the emergency energy storage circuit is connected with the battery, and the second switch circuit is connected between the emergency energy storage circuit and the first power utilization module;
the first switch circuit and the second switch circuit are respectively connected with the controller, and the controller is connected with the second electricity utilization module and used for receiving the password output by the second electricity utilization module and judging whether the password is a preset password or not;
in the first state, the controller is configured to control the first switch circuit to be turned on and control the second switch circuit to be turned off.
6. The power supply circuit of claim 5 wherein said first switching circuit includes a first switch and a second switch connected between said battery and said first consumer module, and a third switch connected to said controller;
a switch control terminal of the second switch is connected to a switch control terminal of the first switch, a three terminal of the third switch is connected to an output terminal of the controller, a switch control terminal of the first switch, and a ground electrode, respectively, the first switch and the second switch are connected in series in opposite directions to form a first cut-off switch, and the first cut-off switch is connected between the battery and the first electrical module; and/or the presence of a gas in the gas,
the second switch circuit comprises a fourth switch, a fifth switch and a sixth switch, the fourth switch is connected with the controller, the switch control end of the fifth switch is connected with the switch control end of the fourth switch, the three ends of the sixth switch are respectively connected with the output end of the controller, the switch control end of the fourth switch and the electrode ground, the fourth switch and the fifth switch are reversely connected in series to form a second cut-off switch, and the second cut-off switch is connected between the emergency energy storage circuit and the battery or between the emergency energy storage circuit and the first electric module.
7. The power supply circuit according to claim 6, wherein a first filter circuit is connected to an input terminal of the first cut-off switch, and a second filter circuit is connected to an output terminal of the first cut-off switch;
and the input end of the second cut-off switch is connected with a third filter circuit, and the output end of the second cut-off switch is connected with a fourth filter circuit.
8. The power supply circuit of claim 5 wherein said switching control circuit further comprises a detection circuit for connection between said controller and said battery;
the detection circuit is used for detecting the current electric quantity of the battery and sending the current electric quantity to the controller, and the controller determines that the battery is in the first state or the second state according to the current electric quantity.
9. An electronic device, characterized in that it comprises a supply circuit according to any one of claims 1 to 8.
10. The electronic device of claim 9, further comprising a door lock motor and a door lock panel;
the power supply circuit comprises a battery, a switching control circuit connected with the battery and an emergency energy storage circuit connected with the switching control circuit, the switching control circuit is connected with the door lock motor, and the battery is connected with the door lock panel;
in a first state that the current electric quantity of the battery is higher than an undervoltage point, the switching control circuit is used for controlling the connection between the battery and the door lock motor and the disconnection between the battery and the emergency energy storage circuit, so that the battery, the door lock motor and the door lock panel form a first power supply loop, and the battery supplies power to the door lock motor and the door lock panel;
the current electric quantity of battery equals or is less than under-voltage under the second state of point, switching control circuit is used for receiving the password of lock panel output, and judge whether the password is preset password, if the password is preset password, switching control circuit is used for controlling the battery with break off between the lock motor, and with switch on between the emergent energy storage circuit, so that the battery utilizes current electric quantity to emergent energy storage circuit charges, and makes emergent energy storage circuit with the lock motor forms second power supply circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221668738.1U CN218678534U (en) | 2022-06-29 | 2022-06-29 | Power supply circuit and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221668738.1U CN218678534U (en) | 2022-06-29 | 2022-06-29 | Power supply circuit and electronic equipment |
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| CN218678534U true CN218678534U (en) | 2023-03-21 |
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| CN202221668738.1U Active CN218678534U (en) | 2022-06-29 | 2022-06-29 | Power supply circuit and electronic equipment |
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| CN (1) | CN218678534U (en) |
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