CN218124384U - Power supply circuit and electronic equipment - Google Patents
Power supply circuit and electronic equipment Download PDFInfo
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- CN218124384U CN218124384U CN202221715472.1U CN202221715472U CN218124384U CN 218124384 U CN218124384 U CN 218124384U CN 202221715472 U CN202221715472 U CN 202221715472U CN 218124384 U CN218124384 U CN 218124384U
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Abstract
The application provides a supply circuit and electronic equipment, the supply circuit that this application provided include control circuit and with the emergent supply circuit that control circuit connects, when the interface that charges of emergent supply circuit is connected with outside emergency power supply, energy storage circuit can save the electric quantity of emergency power supply output, is full of the back at energy storage circuit, and the energy storage power supply switch circuit among the emergent supply circuit of control circuit re-control switches on for energy storage circuit and power consumption system form the emergent supply circuit of energy storage. The emergency power supply is to energy storage circuit charges to concentrate the electric quantity in energy storage circuit, thereby pass through energy storage circuit emits the heavy current in the short time, thereby makes emergency power supply circuit has great load carrying capacity, has satisfied electronic equipment's power consumption demand, can provide normal power supply for electronic equipment after electronic equipment's power supply battery electric quantity is not enough, so that the electron gets into normal operating condition.
Description
Technical Field
The application relates to the technical field of power electronics, in particular to an electronic device and a power supply circuit thereof.
Background
With the continuous development of smart homes, smart electronic devices have become the standard for many families. The battery power supply mode is mostly adopted for intelligent electronic equipment such as an intelligent door lock in the prior art, the intelligent electronic equipment cannot normally work under the condition that the electric quantity of a battery is exhausted or the electric quantity is lower, and the intelligent electronic equipment can only be supplied with power supply voltage through an emergency power supply outside the equipment so that the intelligent electronic equipment normally works.
Common emergency power supplies generally include a charger, a notebook computer, a mobile phone and the like, but the output current of the emergency power supplies is small, that is, the load capacity is weak. Therefore, when the power of the power supply battery of some intelligent electronic devices with large power consumption requirements is insufficient, the intelligent electronic devices cannot normally work by the power supply of the emergency power supply commonly used in life, so that inconvenience in use is brought to users of the intelligent electronic devices.
SUMMERY OF THE UTILITY MODEL
In order to solve the existing problems, the application provides a power supply circuit and electronic equipment which can realize the emergency power supply of an external power supply with small carrying capacity.
A power supply circuit comprises a control circuit and an emergency power supply circuit connected with the control circuit;
the emergency power supply circuit comprises a charging interface, an energy storage circuit connected with the charging interface and an energy storage and power supply switch circuit connected with the energy storage circuit, and the energy storage and power supply switch circuit is used for being connected with an electric system;
if the charging interface is used for being connected with an external emergency power supply, the energy storage circuit can store the electric quantity output by the emergency power supply;
if the electric quantity stored by the energy storage circuit is larger than or equal to the preset electric quantity, the control circuit is used for controlling the conduction of the energy storage power supply switch circuit, so that the energy storage circuit and the power utilization system form an energy storage emergency power supply loop.
In some embodiments, the control circuit includes a stored power comparison circuit connected to the energy storage circuit and the energy storage and power supply switch circuit, respectively, and the stored power comparison circuit is configured to compare whether the current stored power of the energy storage circuit is greater than or equal to the preset power, and output a comparison signal to the energy storage and power supply switch circuit;
the energy storage power supply switch circuit is used for switching off the energy storage circuit in a first state that the current stored electric quantity of the energy storage circuit is smaller than the preset electric quantity and switching on the energy storage circuit in a second state that the current stored electric quantity of the energy storage circuit is larger than or equal to the preset electric quantity according to the comparison signal, so that the energy storage circuit and the power utilization system form an energy storage emergency power supply loop.
In some embodiments, the stored electricity quantity comparison circuit includes a first comparator and a voltage dividing resistor, where the voltage dividing resistor is connected to the charging interface and a first input terminal of the first comparator respectively;
the second input end of the first comparator is connected with the energy storage element and used for receiving energy storage voltage representing the current stored electric quantity of the energy storage element, and the output end of the first comparator is connected with the energy storage power supply switch circuit so as to output the comparison signal to the energy storage power supply switch circuit.
In some embodiments, the energy storage circuit comprises a charging circuit and an energy storage element, the charging circuit is connected between the charging interface and the energy storage element, the charging circuit is further connected with the output end of the stored electric quantity comparison circuit, and the energy storage element is connected with the energy storage power supply switch circuit;
the charging circuit is used for being in a conducting state or an enabling signal valid state in the first state according to the comparison signal so as to enable the charging interface to be conducted with the energy storage element, and being in a disconnecting state or an enabling signal invalid state in the second state so as to enable the charging interface to be disconnected with the energy storage element.
In some embodiments, the charging circuit includes a voltage conversion circuit connected between the charging interface and the energy storage element, the voltage conversion circuit includes a voltage conversion chip and an inductor connected between the voltage conversion chip and the energy storage element, and an enable terminal of the voltage conversion chip is connected to the output terminal of the first comparator;
the voltage conversion chip is used for enabling the signal to be in an effective state under the first state according to the comparison signal so as to convert the voltage output by the emergency power supply into the charging voltage of the energy storage element, and enabling the signal to be in an ineffective state under the second state.
In some embodiments, the energy storage element is selected from at least one of: the charging rate of the super capacitor is larger than the preset rate.
In some embodiments, the energy storage and power supply switching circuit includes a first switch and a second switch connected in series and in reverse between the energy storage circuit and the power consumption system, a first polarity end and a second polarity end of the first switch are respectively connected to the energy storage circuit and a second polarity end of the second switch, a first polarity end of the second switch is connected to the power consumption system, and third polarity ends of the first switch and the second switch are respectively connected to corresponding output ends of the stored power comparison circuit;
the first switch and the second switch are both off in the first state and are both on in the second state.
In some embodiments, the power supply circuit further comprises an external power supply switch circuit;
the control circuit further comprises a judging circuit connected with the charging interface, the external power supply switch circuit is respectively connected with the charging interface, the judging circuit and the power utilization system, and the judging circuit is used for judging whether the load capacity of the emergency power supply connected to the charging interface meets the preset power consumption requirement or not and acquiring a judging signal;
the external power supply switch circuit is used for being in a conducting state when the load capacity of the emergency power supply connected to the charging interface meets the requirement of preset power consumption according to the judgment signal, so that the emergency power supply and the power consumption system form an external power supply loop.
In some embodiments, the determination circuit includes a second comparator connected to the charging interface, and the second comparator is configured to compare a magnitude relationship between an output current of the emergency power supply connected to the charging interface and a reference current of a preset threshold, and output the determination signal to the external power supply switch circuit.
In some embodiments, the power supply circuit further comprises a battery power supply switching circuit for connecting between a battery and the powered system;
if the output electric quantity of the battery is larger than or equal to the preset power consumption requirement, the control circuit is used for controlling the conduction of the battery power supply switch circuit, and the battery and the power utilization system form a battery power supply loop;
if the output electric quantity of the battery is smaller than the power consumption requirement, the control circuit is used for controlling the battery power supply switch circuit to be disconnected, so that the battery power supply loop is disconnected.
An electronic device comprising an electric system and the power supply circuit of any one of the above.
It is from top to bottom apparent, the supply circuit that this application provided include control circuit and with the emergent supply circuit that control circuit connects, when the interface that charges of emergent supply circuit is connected with outside emergency power supply, the energy storage circuit among control circuit control emergency power supply and the emergent supply circuit forms emergent charging circuit to make emergency power supply charge energy storage circuit earlier, after energy storage circuit is full of, the energy storage power supply switch circuit among the emergent supply circuit of control circuit control switches on again, make energy storage circuit and power consumption system form the emergent supply circuit of energy storage. The emergency power supply is to the energy storage electric quantity charges to concentrate the electric quantity in energy storage circuit, thereby pass through energy storage circuit emits heavy current in the short time, thereby makes emergency power supply circuit has great load carrying capacity, has satisfied electronic equipment's power consumption demand, can provide normal power supply for electronic equipment after electronic equipment's power supply battery electric quantity is not enough, so that the electron gets into normal operating condition.
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 disclosure;
fig. 3 is a schematic structural diagram of a stored power comparing circuit in a power supply circuit according to some embodiments of the present disclosure;
fig. 4 is a schematic structural diagram of a tank circuit in a power supply circuit according to some embodiments of the present disclosure;
fig. 5 is a schematic structural diagram of an energy storage power supply switch circuit in a power supply circuit according to some embodiments of the present application;
fig. 6 is a schematic diagram of a power supply circuit according to some embodiments of the present disclosure.
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, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as meaning directly connected or indirectly connected through an intermediate medium, and as meaning 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.
The intelligent door lock is as the smart machine at home of a commonly used intelligence, and it is when the power supply battery electric quantity is not enough, can have the condition that the user can't unblank outdoors, and this kind of condition can be unblanked or unblanked by the mode that adopts mechanical picking lock through the outside emergent power supply voltage of lock, and the latter can bring the damage of lock, generally not advisable. To traditional lock, adopt fingerprint identification, password, bluetooth, NFC card etc. to unblank mode generally, its power consumption of power consumption system is little, and the electric current that is less than 500 milliamperes can supply the lock normal work, consequently can adopt the emergent power supply commonly used that takes load capacity weaker to realize that outside emergency power supply unblanks. However, for the intelligent door lock unlocked by the face recognition method, because the face recognition power consumption is large, and the current less than 500 milliamperes cannot supply face recognition to normally work, the face recognition lock in the current market cannot enter a normal working state when a common mobile emergency power supply is adopted to directly supply power, so that the face recognition cannot be normally used, and the face unlocking cannot be realized. Under the background, the inventor provides a power supply circuit to solve the problem that an emergency power supply has a weak load capacity and cannot normally supply power to some electronic devices with large power consumption requirements. It should be noted that the power supply circuit provided according to the embodiment of the present application may be but is not limited to be applied to an intelligent door lock, and the electronic device provided by the embodiment of the present application may be but is not limited to an intelligent door lock, for example, the electronic device may be an intelligent door lock unlocked based on face recognition.
Fig. 1 is a schematic diagram of a power supply circuit according to some embodiments of the present disclosure. The power supply circuit is arranged in the electronic equipment to supply power for an electric system of the electronic equipment. The electronic device may be, but is not limited to, an intelligent door lock, and a power utilization system of the intelligent door lock comprises a high-power utilization module and a low-power utilization module. The high-power electricity utilization module comprises a door lock motor, and the low-power electricity utilization module comprises a door lock panel. The intelligent door lock is characterized in that a circuit board for controlling the intelligent door lock is arranged in the door lock panel, and a main control chip on the circuit board controls the door lock motor to drive the bolt in the intelligent door lock to be opened and closed, so that the intelligent door lock is unlocked and locked.
Referring to fig. 1, the power supply circuit includes a control circuit 1 and an emergency power supply circuit 3 connected to the control circuit 1. The emergency power supply circuit 3 includes a charging interface 31, an energy storage circuit 32 connected to the charging interface 31, and an energy storage and power supply switch circuit 33 connected to the energy storage circuit 32, and the energy storage and power supply switch circuit 33 is used for being connected to the power consumption system 4. Wherein, if interface 31 and the emergency power supply that charges are connected, control circuit 1 is used for controlling the emergency charging circuit that emergency power supply 5 and energy storage circuit 32 formed and switches on to make energy storage circuit 32 save the electric quantity of emergency power supply 5 output, if the electric quantity that energy storage circuit 32 saved is greater than or is equal to predetermineeing the electric quantity, control circuit 1 is used for controlling energy storage power supply switch circuit 33 and switches on, so that energy storage circuit 32 and electric system 4 form the emergent power supply circuit of energy storage.
It can be seen from above that, the supply circuit that this application embodiment provided, when emergency supply circuit's the interface that charges is connected with outside emergency power supply, make emergency power supply and the energy storage circuit among the emergency supply circuit form emergent charging circuit to make emergency power supply charge energy storage circuit earlier, be full of the back at energy storage circuit, make the energy storage power supply switch circuit among the emergency supply circuit switch on, make energy storage circuit and power consumption system form the emergent supply circuit of energy storage. The energy storage electric quantity is charged through the emergency power supply firstly, so that the electric quantity is concentrated in the energy storage circuit, large current is emitted in a short time through the energy storage circuit, the emergency power supply circuit has large loading capacity, the power consumption requirement of a power consumption system in the electronic equipment is met, the energy provided by the emergency power supply can be utilized to provide normal power supply for the electronic equipment after the electric quantity of a power supply battery of the electronic equipment is insufficient, and the electron enters a normal working state.
Referring to fig. 2, based on the embodiment shown in fig. 1, the power supply circuit according to some embodiments of the present application further includes a battery power supply circuit 2 connected to the control circuit 1. The battery supply circuit 2 comprises a battery supply switching circuit 22 for connection to a battery 21. The battery 21 is connected to the power consumption system 4 through a battery-powered switching circuit 22. During the period that the remaining capacity of the battery 21 connected to the battery power supply switch circuit 22 is greater than or equal to the power consumption required by the power consumption system 4 to execute the corresponding function, the control circuit 1 controls the battery power supply switch circuit 22 to be turned on, so that the battery 21 and the power consumption system form a battery power supply loop, that is, the battery 21 supplies power to the power consumption system 4 via the battery power supply switch circuit 22. If the remaining power of the battery 21 is less than the power consumption required by the power system 4 to execute the corresponding function, and the stored power in the energy storage circuit 32 is less than the reference power, the control circuit 1 controls the emergency power supply 5 and the energy storage circuit 32 to form an emergency charging loop, and controls the energy storage switch power supply circuit 33 to be disconnected, so that the emergency power supply 5 to be connected to the charging interface 31 charges the energy storage circuit 32. If the stored power of the energy storage circuit 32 is greater than or equal to the preset power, the control circuit 1 controls the energy storage and power supply switching circuit 33 to be turned on, and the energy storage circuit 32 supplies power to the power utilization system 4 through the energy storage and power supply switching circuit 33.
In some embodiments, the power consumption system 4 is a door lock power consumption system in an intelligent door lock, and the power consumption required by the power consumption system 4 to execute the corresponding function may refer to one-time unlocking power consumption of the door lock power consumption system. The once unlocking power consumption of the door lock power system specifically refers to the power consumption which is required to be consumed when the door lock power system controls the intelligent door lock to unlock once, and is called unlocking power consumption in the application. When the power supply circuit provided in the embodiment of the application is applied to the intelligent door lock to supply power for the door lock power utilization system of the intelligent door lock, the preset electric quantity is set according to the unlocking power consumption, and the preset electric quantity is larger than or equal to the electric quantity corresponding to the unlocking power consumption. In some embodiments, the preset electric quantity is an electric quantity corresponding to 1 to 5 times of the unlocking power consumption, that is, after the electric quantity stored in the storage circuit 32 reaches the preset electric quantity, the storage circuit 32 may perform the power consumption required for 1 to 5 times of the unlocking action for the electric system for the door lock. For example, the preset electric quantity may be 2 times or 3 times of electric quantity corresponding to the unlocking power consumption. For the intelligent door lock, after the remaining capacity of the battery 21 is smaller than the unlocking power consumption, the electric system for the door lock cannot work normally, so that the intelligent door lock cannot execute corresponding unlocking action. In some embodiments, the power consumption system may be a power consumption system for a door lock in an intelligent door lock based on a face recognition unlocking mode, where the power consumption system for the door lock includes a face recognition module, and the aforementioned unlocking power consumption includes power consumption required when the face recognition module executes face recognition to unlock the door lock. When the remaining capacity of the battery 21 is lower than the unlocking power consumption, the battery 21 cannot provide normal working voltage for the face recognition module, and then the face recognition module cannot be normally opened. Therefore, during the remaining capacity of the battery 21 is lower than the unlocking power consumption, the voltage provided by the battery 21 cannot meet the working voltage requirement of the electric system for the door lock, and at the moment, if the intelligent door lock needs to be unlocked, the power supply loop of the electric system for the door lock needs to be switched to the energy storage emergency power supply loop from the battery power supply loop. During the period of needing to use the emergency power supply circuit 3 to supply power to the power utilization system 4, if the stored energy currently in the energy storage circuit 32 is smaller than the preset electric quantity, the emergency power supply 5 connected to the charging interface 31 needs to charge the energy storage circuit 32 first, and during the charging period of the energy storage circuit 32, but not limited to, the energy storage power supply switching circuit 33 may be in an off state. If the stored electricity quantity of the energy storage circuit 2 is greater than or equal to the reference electricity quantity, the energy storage and power supply switching circuit 33 is turned on, and the energy stored in the energy storage circuit 32 supplies power to the power utilization system 4 through the energy storage and power supply switching circuit 33. In some embodiments, the emergency power supply 5 may be a portable mobile power supply, such as a charger, a notebook computer, a mobile phone, and the like.
It can be seen from above that, when the power supply circuit who provides in this application embodiment was applied to intelligent lock and supplies power for the electric system of intelligent lock, the residual capacity of battery in battery supply circuit was greater than or equal to during the power consumption of once unblanking of lock electric system, by battery supply loop circuit does lock power supply system supplies power the residual capacity of battery is less than during the power consumption of once unblanking of lock electric system, charge for the energy storage circuit in the emergent power supply circuit by the outside emergency power source of lock, after energy storage circuit charges and accomplishes, supply power for lock electric system by the emergent power supply circuit of energy storage. The emergency power supply firstly charges the energy storage electric quantity so as to concentrate the electric quantity in the energy storage circuit. Because the internal resistance of the energy storage circuit is generally low, the energy output by the emergency power supply can be stored in a short time and converted into large current output, and therefore the load carrying capacity of the energy storage circuit is larger than that of the emergency power supply, the unlocking power consumption requirement of the door lock power supply system can be met, the requirement of a large-power-consumption power consumption module in the door lock power consumption system can be particularly met, for example, the power consumption requirement of a face recognition module is met, and then face recognition unlocking is achieved. Therefore, the power supply circuit provided by the embodiment of the application can adopt the portable emergency power supply with smaller output current to supply power to the door lock power system with larger power consumption so as to start the door lock power system to carry out normal working state.
Furthermore, in some embodiments, the control circuit 1 is further configured to control the disconnection between the battery 21 and the power system 4 during the charging of the energy storage circuit 32 by the emergency power supply 5, so as to prevent the current from being dumped into the battery 21 during the charging of the energy storage circuit 32 by the emergency power supply 5.
Referring to fig. 2, in some embodiments, the energy storage circuit 32 includes a charging circuit 321 and an energy storage device 322, the charging circuit 321 is connected between the charging interface 31 and the energy storage device 322, and the energy storage device 322 is connected to the energy storage power supply switch circuit 33. In a first state where the current storage capacity of the energy storage circuit is smaller than the preset capacity, the charging circuit 321 is in a conducting state or in an enabling signal valid state, and the emergency power supply 5 connected to the charging interface 31 charges the energy storage element 322 through the charging circuit 321, so that the energy storage element 322 stores the capacity of the emergency power supply 5. In a second state where the current storage capacity of the energy storage circuit is greater than or equal to the preset capacity, that is, after the charging of the energy storage element 322 is completed, the charging circuit 321 is in an off state or an enable signal invalid state, and the energy storage power supply switching circuit 33 is in an on state, the energy storage element 322 supplies power to the power consumption system 4 through the energy storage power supply switching circuit 33. In some embodiments, the energy storage element 322 is a super capacitor having an internal resistance smaller than that of the emergency power supply 5, and in other embodiments, the energy storage element 322 is a rechargeable battery having a charging rate larger than a predetermined rate. It should be noted that in some embodiments, the charging circuit 321 may be a switch circuit, and the state of the charging circuit 321 is switched between an on state and an off state, and in other embodiments, the charging circuit 321 may also be a voltage conversion circuit, and the state of the charging circuit 321 is switched between an enable signal active state and an enable signal inactive state. The enabled signal valid state refers to a state of the voltage conversion circuit during a period when the enabled signal terminal of the voltage conversion chip in the voltage conversion circuit receives a valid enable signal, and the enabled signal invalid state refers to a state of the voltage conversion circuit during a period when the enabled signal terminal of the voltage conversion chip in the voltage conversion circuit receives an invalid enable signal. When the voltage conversion circuit is in the enabled state, the voltage conversion circuit may convert the voltage output by the emergency power supply 5 into the charging voltage for charging the energy storage element 322, and when the voltage conversion circuit is in the disabled state, no voltage is output from the output terminal of the voltage conversion circuit, and the energy storage element 322 is not currently charged.
In some embodiments, the control circuit 1 includes a stored power comparison circuit (not shown in fig. 1 and 2), which compares the current stored power of the energy storage circuit 32 with a preset power to determine whether the current stored power of the energy storage circuit 32 is greater than or equal to the preset power, and outputs a comparison signal. The energy storage and power supply switch circuit 33 is configured to turn off in a first state where the current stored electric quantity of the storage circuit 32 is smaller than a preset electric quantity and turn on in a second state where the current stored electric quantity of the storage circuit 32 is greater than or equal to the preset electric quantity according to the comparison signal output by the stored electric quantity comparison circuit, so that the energy storage circuit 32 and the power utilization system 4 form an energy storage emergency power supply loop during the period that the energy storage circuit 32 is in the second state. It will be appreciated that the aforementioned comparison signal may be used to indicate whether the tank circuit 32 is currently in the first state or the second state.
In some embodiments, the output terminal of the stored energy comparing circuit in the control circuit 1 is further connected to the charging circuit 321, the charging circuit 321 is configured to be in a conducting state or an enabled state in the first state to enable the emergency charging circuit to be in a conducting state, and is configured to be in a disconnecting state or an enabled state in the second state to disable the enable signal, according to the comparison signal output by the stored energy comparing circuit, and the energy-storing power-supplying switch circuit 33 is configured to be in a conducting state in the second state to enable the emergency charging circuit to be in a disconnecting state and the energy-storing emergency power-supplying circuit to be in a conducting state, according to the comparison signal output by the stored energy comparing circuit.
Referring to fig. 3, in some embodiments, the energy storage capacity comparison circuit includes a first comparator 111 and a voltage dividing resistor 112 connected to the charging interface 31, where the voltage dividing resistor 112 is configured to divide the output voltage V _ USB of the emergency power supply 5 connected to the charging interface 31 to obtain a reference voltage Vref representing the preset capacity and send the reference voltage Vref to a first input end of the first comparator 111. A second input end of the first comparator 111 is connected to the energy storage element 322 and is configured to receive an energy storage voltage V _ CAP representing a current stored electric quantity of the energy storage element 322, and an output end of the first comparator 111 is respectively connected to the charging circuit 321 and the energy storage power supply switching circuit 33 and is configured to output a comparison signal Charge _ EN. The voltage dividing resistor 112 includes a first voltage dividing resistor R2 and a second voltage dividing resistor R3, and the first voltage dividing resistor R2 and the second voltage dividing resistor R3 are connected in series between the charging interface 31 and the electrode ground. The node at which the first divider resistor R2 and the second divider resistor R3 are connected is connected to a first input of the first comparator 111. When the energy storage voltage V _ CAP is smaller than the reference voltage Vref, which indicates that the current energy storage capacity of the energy storage circuit 32 is smaller than the preset energy storage capacity, the comparison signal Charge _ EN indicates that the current state is in the first state. When the tank voltage V _ CAP is greater than or equal to the reference voltage Vref, which indicates that the current storage capacity of the tank circuit 32 is greater than or equal to the reference capacity, the comparison signal Charge _ EN indicates that the current state is the aforementioned second state.
Please refer to fig. 4, which is a circuit diagram of an embodiment of the tank circuit 32. In some embodiments, the charging circuit 321 is a voltage converting circuit connected between the charging interface 31 and the energy storage element 322, the voltage converting circuit includes a voltage converting chip Udc, and an inductor L1 connected between the voltage converting chip Udc and the energy storage element 322, and an enable terminal of the voltage converting chip Udc is connected to the output terminal of the first comparator 111. The voltage conversion chip Udc is configured to, according to the comparison signal Charge _ EN, be in an enable signal active state in the aforementioned first state to convert the voltage output by the emergency power supply 5 into the charging voltage of the energy storage element 322, and be in an enable signal inactive state in the aforementioned second state to stop providing the charging voltage for the energy storage element 322, and stop charging the energy storage element 322.
Further, the energy storage element 322 is a super capacitor C1. The enable terminal EN of the voltage conversion chip Udc is connected to the output terminal of the first comparator 111, and in the first state where the comparison signal Charge _ EN indicates the foregoing, the voltage conversion chip Udc receives the output current/voltage of the emergency power supply 5 connected to the charging interface 31 and outputs the charging current/voltage of the energy storage element 322. In the aforementioned first state, the energy storage element 322 is charged by the voltage conversion chip Udc for converting the voltage V _ USB output from the emergency power supply 5 into a charging voltage for charging the energy storage element 322.
Specifically, the voltage conversion chip Udc is connected between the output voltage V _ USB terminal of the charging interface 31 and the super capacitor C1. In some embodiments, the voltage conversion chip Udc may be, but is not limited to, a direct current to direct current BUCK type voltage conversion chip (BUCK type DC-DC conversion chip). The charging circuit 321 further includes a peripheral device located at the periphery of the voltage converting chip Udc, and the peripheral device is the aforementioned inductor L1. The voltage conversion chip Udc and the peripheral device step down the voltage V _ USB output by the emergency power supply 5 to the charging voltage required by the energy storage element 322, and then charge the super capacitor C1.
Referring to fig. 4, the voltage input terminal VIN of the voltage conversion chip Ucd is connected to the V _ USB terminal for receiving the voltage V _ USB output by the emergency power supply 5. The voltage conversion chip Ucd has 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 to the first end of the super capacitor C1, and the second end of the super capacitor C1 is grounded via the resistor R1. The resistor R1 is used for feeding back the charging current of the super capacitor C1 to the electric current feedback end FB of 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 terminal FB.
Referring to fig. 5, in some embodiments, the energy storage and power supply switching circuit 33 includes a first switch Q1 and a second switch Q2 connected in series and in reverse between the energy storage circuit 32 and the power consumption system 4, a first polarity end and a second polarity end of the first switch Q1 are respectively connected to the energy storage circuit 32 and the second polarity end of the second switch Q2, the first polarity end of the second switch Q2 is connected to the power consumption system 4, and third polarity ends of the first switch Q1 and the second switch Q2 are respectively used for being connected to an output end of the storage circuit comparison circuit to receive the comparison signal Charge _ EN. The first switch Q1 and the second switch Q2 are both turned off in the first state and turned on in the second state according to the comparison signal Charge _ EN.
Specifically, in some embodiments, the first switch Q1 and the second switch Q2 are MOS transistors, one of the first polarity end and the second polarity end is a source of the MOS transistor, and the other is a drain of the MOS transistor. The third polarity terminals of the first switch Q1 and the second switch Q2 are both the gate terminals of MOS transistors. When the comparison signal Charge _ EN indicates the first state, the first switch Q1 and the second switch are both off, and when the comparison signal Charge _ EN indicates the second state, the first switch Q1 and the second switch are both on.
As shown in fig. 5, in some embodiments, the energy storage and power supply switching circuit 33 further includes a resistor R4, a first end of the resistor R4 is connected to the third polarity ends of the first switch Q1 and the second switch Q1, respectively, and a second end of the resistor R4 is connected to the output end of the stored electric quantity comparison circuit, and is configured to receive the comparison signal Charge _ EN. In addition, the energy storage and supply switching circuit 33 further includes a capacitor C5 and a resistor R5, a first end of the capacitor C5 is connected to a node where the first switch Q1 and the second switch Q2 are connected, and a second end of the capacitor C5 is connected to the electrode ground. The resistor R5 is connected to a node where the first switch Q1 and the second switch Q2 are connected, and a second end of the capacitor R5 is connected to the electrode ground.
The first switch Q1 and the second switch Q2 are connected in series in an inverse direction, that is, the substrate diodes of the first switch Q1 and the second switch Q2 are connected in series in an inverse direction. In some embodiments, the energy storage and power supply switching circuit 33 further includes capacitors C6 and C7 connected in parallel between the electrode ground terminals, and the capacitors C6 and C7 are respectively connected to the first polarity terminal of the second switch Q2.
In some embodiments, the charging interface 31 may be a USB interface or a Type-C interface. And also can be a Micro USB or Mini US interface. The emergency power supply 5 can be a charger baby, a notebook computer, a mobile phone and the like. The required supply current of the powered system is greater than or equal to 500 milliamperes. The power consumption system of the intelligent door lock of the power consumption system 4 comprises a face recognition module with the power supply current larger than 500 milliamperes, and the face recognition module is used for obtaining a face recognition result so as to unlock the intelligent door lock.
Referring to fig. 6, in some embodiments, the power supply circuit provided by the present application further includes an external power supply switch circuit 34 connected between the charging interface 31 and the power consumption system 4, and the control circuit 1 further includes a determining circuit (not shown in fig. 6) connected to the charging interface 31, where the determining circuit is configured to determine whether a load capacity of the emergency power supply 5 connected to the charging interface 31 meets a power consumption requirement of the power consumption system 4, so as to obtain a determining signal. The external power supply switch circuit 34 is connected to the charging interface, the determination circuit, and the power consumption system. The external power supply switch circuit 34 is configured to be in a conduction state when the load capacity of the emergency power supply 5 connected to the charging interface 31 meets the preset power consumption requirement according to the determination signal, so that the emergency power supply 5 and the power consumption system 4 form an external power supply loop.
Specifically, the determination circuit determines the loaded capacity of the emergency power supply 5 by comparing the magnitude relationship between the output current of the emergency power supply 5 and a preset threshold. If the output current of the emergency power supply 5 is smaller than the preset threshold value (for example, smaller than 500 milliamperes) by comparison, it is determined that the output current of the emergency power supply cannot meet the power consumption requirement of the power utilization system 4, and the emergency power supply 5 needs to be charged for the super capacitor C1 through the charging circuit 321, so that the load capacity is improved through the super capacitor C1, and the power consumption requirement of the power utilization system is met. If the output current of the emergency power supply 5 is greater than or equal to the preset threshold value through comparison, the power consumption requirement of the power consumption system 4 is judged to be met by the output current of the emergency power supply, the external power supply switch circuit 34 is in a conducting state, and the emergency power supply 5 directly supplies power to the power consumption system through the external power supply switch circuit. In some embodiments, the determining circuit includes a second comparator connected to the charging interface 31, and the second comparator is configured to compare the magnitude relationship between the output current of the emergency power supply 5 connected to the charging interface 31 and the reference current of the preset threshold, and output the determining signal to the external power supply switching circuit 34.
In some embodiments, the output ends of the storage circuit comparison circuit and the judgment circuit in the control circuit may be directly connected to the corresponding controlled circuit to control the on-off state of the corresponding controlled circuit, or may be connected to the corresponding controlled circuit through a logic circuit. That is, in some embodiments, the aforementioned control circuitry further comprises logic circuitry as described herein. The controlled circuit is a circuit controlled by the signal output by the control circuit, and includes the energy storage and power supply switching circuit, the battery power supply switching circuit, the external power supply switching circuit, the charging circuit, and the like.
In some embodiments, the emergency power supply circuit further comprises a battery charging switch circuit (not illustrated in the various schematic diagrams of the figures of the specification) connected for connection between the battery and the tank circuit 32. In the first state, the emergency power supply 5 connected to the charging interface 31 charges the energy storage circuit 32, the battery charging switch circuit is turned off, the energy storage and power supply switch circuit is turned off, and the power supply circuit enters the emergency charging state. When the power of the battery 21 is larger than the power consumption requirement of the power consumption system, the power supply circuit is in a battery power supply state, and the power supply voltage is supplied to the power consumption system 4 by using the power of the battery 21. When the power supply circuit is applied to the intelligent door lock, the power utilization system 4 comprises an unlocking control system in a door lock panel and a door lock motor. When the electric quantity of the battery 21 is greater than the power consumption requirement required by the unlocking control system in the door lock panel when the unlocking instruction is executed, but is less than the power consumption requirement required by the door lock motor when the unlocking action is executed, the power supply circuit enters a state that the battery 31 charges the energy storage circuit 32, and after the energy storage circuit 32 is charged, the energy storage circuit 32 supplies power to the door lock power consumption system. When the electric quantity of the battery 21 is further reduced to be incapable of being unlocked by inputting a password from the outside or by a face recognition mode, the power supply circuit enters an emergency power supply state, if the output current of the emergency power supply 5 is greater than the reference current of the preset threshold value, the emergency power supply 5 firstly charges the energy storage circuit 32, the energy storage circuit 32 stores and accumulates the electric quantity of the emergency power supply 5, after the energy storage circuit 32 finishes charging, the energy storage circuit 32 supplies power for the door lock system, if the output current of the emergency power supply 5 is greater than the reference current of the preset threshold value, the external power supply switch circuit 34 is switched on, and the emergency power supply directly supplies power for the door lock power system.
In addition, in some embodiments, the present application further provides an electronic device, and the power supply circuit of the electronic device provided according to the embodiments of the present application is the power supply circuit provided according to any one of the embodiments of the present application.
In some embodiments, the electronic device provided by the present application may be, but is not limited to, an intelligent door lock, and then the power system in the power supply circuit provided by the present application is a power system for a door lock, and the power system for a door lock may further include an unlocking control system (control circuit board) and a door lock motor in a door lock panel.
The application provides an electronic equipment, during the battery is sufficient, by battery supply circuit is the electronic equipment power supply, during the residual capacity of battery is not enough, charges for energy storage circuit by emergency power source, and after energy storage circuit charges and accomplishes, emergency supply circuit passes through energy storage circuit and supplies power for electronic equipment's electric system. Because emergency power source is through charging the energy storage electric quantity to concentrate the electric quantity in energy storage circuit, energy storage circuit area load capacity is greater than emergency power source's area load capacity can emit the heavy current in the short time, thereby can satisfy the power consumption demand of the electric system among the electronic equipment.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (11)
1. A power supply circuit is characterized by comprising a control circuit and an emergency power supply circuit connected with the control circuit;
the emergency power supply circuit comprises a charging interface, an energy storage circuit connected with the charging interface and an energy storage and power supply switch circuit connected with the energy storage circuit, and the energy storage and power supply switch circuit is used for being connected with an electric system; the charging interface is used for being connected with an external emergency power supply, so that the energy storage circuit can store the electric quantity output by the emergency power supply;
if the electric quantity stored by the energy storage circuit is larger than or equal to the preset electric quantity, the control circuit is used for controlling the conduction of the energy storage power supply switch circuit, so that the energy storage circuit and the power utilization system form an energy storage emergency power supply loop.
2. The power supply circuit according to claim 1, wherein the control circuit comprises a stored power comparison circuit connected to the tank circuit and the tank power switch circuit, respectively, and the stored power comparison circuit is configured to compare whether a current stored power of the tank circuit is greater than or equal to the preset power and output a comparison signal to the tank power switch circuit;
the energy storage power supply switch circuit is used for switching off the energy storage circuit in a first state that the current stored electric quantity of the energy storage circuit is smaller than the preset electric quantity and switching on the energy storage circuit in a second state that the current stored electric quantity of the energy storage circuit is larger than or equal to the preset electric quantity according to the comparison signal, so that the energy storage circuit and the power utilization system form an energy storage emergency power supply loop.
3. The power supply circuit according to claim 2, wherein the energy storage circuit comprises a charging circuit and an energy storage element, the charging circuit is connected between the charging interface and the energy storage element, the charging circuit is further connected with the output end of the stored electric quantity comparison circuit, and the energy storage element is connected with the energy storage power supply switch circuit;
the charging circuit is used for being in a conducting state or an enabling signal valid state in the first state according to the comparison signal so as to enable the charging interface to be conducted with the energy storage element, and being in a disconnecting state or an enabling signal invalid state in the second state so as to enable the charging interface to be disconnected with the energy storage element.
4. The power supply circuit according to claim 3, wherein the stored power comparison circuit comprises a first comparator and a voltage dividing resistor, and the voltage dividing resistor is respectively connected with the charging interface and a first input terminal of the first comparator;
the second input end of the first comparator is connected with the energy storage element and used for receiving energy storage voltage representing the current storage electric quantity of the energy storage circuit, and the output end of the first comparator is connected with the energy storage power supply switch circuit so as to output the comparison signal to the energy storage power supply switch circuit.
5. The power supply circuit of claim 3, wherein the charging circuit comprises a voltage conversion circuit connected between the charging interface and the energy storage element, the voltage conversion circuit comprises a voltage conversion chip and an inductor connected between the voltage conversion chip and the energy storage element, and an enable terminal of the voltage conversion chip is connected with the output terminal of the stored electric quantity comparison circuit;
the voltage conversion chip is used for enabling the signal to be in an effective state under the first state according to the comparison signal so as to convert the voltage output by the emergency power supply into the charging voltage of the energy storage element, and enabling the signal to be in an ineffective state under the second state.
6. The power supply circuit of claim 3, wherein the energy storage element is selected from at least one of: the charging rate of the super capacitor is larger than the preset rate.
7. The power supply circuit according to any one of claims 2 to 6, wherein the energy storage and power supply switching circuit comprises a first switch and a second switch connected in series and in reverse between the energy storage circuit and the power consumption system, a first polarity end and a second polarity end of the first switch are respectively connected with a second polarity end of the energy storage circuit and a second polarity end of the second switch, a first polarity end of the second switch is connected with the power consumption system, and a third polarity end of the first switch and a third polarity end of the second switch are respectively connected with a corresponding output end of the stored power comparison circuit;
the first switch and the second switch are both off in the first state and are both on in the second state.
8. The power supply circuit according to any one of claims 1 to 6, further comprising an external power supply switch circuit;
the control circuit further comprises a judging circuit connected with the charging interface, the external power supply switch circuit is respectively connected with the charging interface, the judging circuit and the power utilization system, and the judging circuit is used for judging whether the load capacity of the emergency power supply connected to the charging interface meets the preset power consumption requirement or not and acquiring a judging signal;
the external power supply switch circuit is used for being in a conducting state when the load capacity of the emergency power supply connected to the charging interface meets the requirement of preset power consumption according to the judgment signal, so that the emergency power supply and the power consumption system form an external power supply loop.
9. The power supply circuit according to claim 8, wherein the judging circuit comprises a second comparator connected to the charging interface, and the second comparator is configured to compare a magnitude relationship between an output current of the emergency power supply connected to the charging interface and a reference current of a preset threshold, and output the judging signal to the external power supply switch circuit.
10. The power supply circuit according to any one of claims 1 to 6, wherein the power supply circuit further comprises a battery power supply switch circuit for connecting between a battery and the power system;
if the output electric quantity of the battery is larger than or equal to the preset power consumption requirement, the control circuit is used for controlling the conduction of the battery power supply switch circuit, and the battery and the power utilization system form a battery power supply loop ；
If the output electric quantity of the battery is smaller than the preset power consumption requirement, the control circuit is used for controlling the battery power supply switching circuit to be disconnected, so that the battery power supply loop is disconnected.
11. An electronic device characterized by comprising an electric system and a power supply circuit according to any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221715472.1U CN218124384U (en) | 2022-06-29 | 2022-06-29 | Power supply circuit and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221715472.1U CN218124384U (en) | 2022-06-29 | 2022-06-29 | Power supply circuit and electronic equipment |
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| CN218124384U true CN218124384U (en) | 2022-12-23 |
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| CN202221715472.1U Active CN218124384U (en) | 2022-06-29 | 2022-06-29 | Power supply circuit and electronic equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116914898A (en) * | 2023-09-14 | 2023-10-20 | 卧安科技(深圳)有限公司 | Power supply circuit and power supply method of intelligent equipment and intelligent equipment |
| CN117811177A (en) * | 2024-02-26 | 2024-04-02 | 深圳市德利和能源技术有限公司 | Power supply system |
-
2022
- 2022-06-29 CN CN202221715472.1U patent/CN218124384U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116914898A (en) * | 2023-09-14 | 2023-10-20 | 卧安科技(深圳)有限公司 | Power supply circuit and power supply method of intelligent equipment and intelligent equipment |
| CN117811177A (en) * | 2024-02-26 | 2024-04-02 | 深圳市德利和能源技术有限公司 | Power supply system |
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