CN210517885U - Emergency power supply automatic switching circuit and electronic equipment thereof - Google Patents
Emergency power supply automatic switching circuit and electronic equipment thereof Download PDFInfo
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- CN210517885U CN210517885U CN201920463254.5U CN201920463254U CN210517885U CN 210517885 U CN210517885 U CN 210517885U CN 201920463254 U CN201920463254 U CN 201920463254U CN 210517885 U CN210517885 U CN 210517885U
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- power supply
- battery
- emergency
- emergency power
- module
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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 utility model discloses an automatic switching circuit of an emergency power supply, which comprises an emergency power supply connection interface, a battery power supply module, a battery power supply control module and an emergency power supply module; the battery supplies power through the battery power supply module; the emergency power supply is connected with the circuit through the emergency power supply connecting interface and supplies power through the emergency power supply module; when the emergency power supply is connected with the emergency power supply connection interface, the emergency power supply module outputs an emergency control signal to the battery power supply control module; the battery power supply control module outputs a power supply switching control signal to the battery power supply control module according to the emergency control signal, and the battery power supply control module disconnects a power supply channel of the battery to realize independent power supply of the emergency power supply. The utility model also discloses an electronic equipment who includes emergency power source automatic switch-over circuit. The utility model discloses a power automatic switch-over behind the emergency power source access circuit, the consumption of circuit is lower moreover, low cost and reliability height.
Description
Technical Field
The utility model particularly relates to an emergency power source automatic switch-over circuit and electronic equipment thereof.
Background
With the development of economic technology, electronic equipment has been widely applied to the production and life of people, and brings endless convenience to the production and life of people. With the widespread use of electronic devices, the power supply of electronic devices has become a hot point of research.
More and more devices employ batteries as power supplies. When the battery is used as a power supply, once the battery electricity is about to be exhausted, the battery voltage can be reduced to a certain threshold value, the voltage which can be output by the battery can not meet the input requirement of a system power module any more, the current which can be output by the battery can not meet the requirement of normal operation of the system any more, and at the moment, the system can not operate at full speed or certain functions can not be started, and the operating requirement of the actual working condition environment can not be met. Therefore, an emergency power supply switching circuit is often designed on the equipment, and the emergency power supply can be accessed when the electric quantity of the system battery is about to be exhausted, so that the system can run at full speed to meet the working requirement of actual working conditions.
When an emergency power supply is connected to the current emergency power supply switching circuit, the switching modes mainly adopt the following two modes: the first is to adopt a diode mode, and adopt diode circuit isolation to prevent the battery from being charged, and the circuit is extremely simple but has low reliability; after the emergency power supply is connected into the circuit, a controller mode is adopted when the power supply is automatically switched, namely the controller detects the connection of the emergency power supply, and controls the disconnection of the power supply of the existing battery and transfers the power supply to the emergency power supply; however, this solution requires controller intervention, and is slow in time response, complex in circuit and high in cost.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an emergency power source automatic switch-over circuit that low cost and low power dissipation reliability are high.
A second object of the present invention is to provide an electronic device, which includes the emergency power supply automatic switching circuit.
The utility model provides an automatic switching circuit of an emergency power supply, which comprises an emergency power supply connection interface, a battery power supply module, a battery power supply control module and an emergency power supply module; the battery is connected with the battery power supply module; the emergency power supply connecting interface is connected with an emergency power supply module; the output end of the battery power supply module is in short circuit with the output end of the emergency power supply module and supplies power to the outside; the control end of the battery power supply module is connected with the output end of the battery power supply control module; the emergency power supply module also outputs an emergency control signal and is connected to the input end of the battery power supply control module; the battery outputs power supply electric energy through the battery power supply module and supplies power; the emergency power supply is connected with the circuit through the emergency power supply connecting interface, and outputs power supply electric energy through the emergency power supply module and supplies power; when the emergency power supply is connected with the emergency power supply connection interface, the emergency power supply module outputs an emergency control signal to the battery power supply control module; the battery power supply control module outputs a power supply switching control signal to the battery power supply control module according to the input emergency control signal; and the battery power supply control module disconnects the power supply channel of the battery after receiving the power supply switching control signal, so that the independent power supply of the emergency power supply is realized.
The battery power supply module comprises a first switch tube and a second switch tube, wherein the first switch tube is powered by a battery; one end of the movable end of the first switch tube powered by the battery is connected with the output end of the battery, the other end of the movable end of the first switch tube powered by the battery is connected with the other end of the movable end of the second switch tube powered by the battery, and one end of the movable end of the second switch tube powered by the battery is used as the output end of the battery power supply module to supply power to the outside; the control end of the first battery-powered switch tube and the control end of the second battery-powered switch tube are both connected with the output end of the battery-powered control module; the other end of the cell is directly grounded.
The first switch tube powered by the battery and the second switch tube powered by the battery are P-channel MOS tubes.
The emergency power supply automatic switching circuit also comprises a battery-powered first diode and a battery-powered second diode, wherein the battery-powered first diode and the battery-powered second diode can be independent diodes or internal body diodes of the P-channel MOS tube; the first diode of battery power supply is parallelly connected with the first switch tube of battery power supply, and battery power supply second diode is parallelly connected with battery power supply second switch tube, and the output of battery is connected to the positive pole of the first diode of battery power supply, and the output of battery power supply module is connected to the positive pole of battery power supply second diode.
The battery power supply control module comprises a power supply control first resistor and a power supply control second resistor; one end of the power supply control first resistor is connected with the other end of the movable end of the battery power supply first switch tube, the other end of the power supply control first resistor is connected with one end of the power supply control second resistor, and the other end of the power supply control second resistor is grounded; the other end of the power supply control first resistor is the output end of the battery power supply control module and outputs a power supply switching control signal; one end of the power supply control second resistor is an input end of the battery power supply control module, is connected with the emergency power supply module and acquires an emergency control signal output by the emergency power supply module.
The resistance values of the power supply control first resistor and the power supply control second resistor are not less than 1M ohm.
The emergency power supply module comprises an emergency power supply switch tube; one end of the movable end of the emergency power supply switch tube is connected with the emergency power supply connection interface, and the other end of the movable end of the emergency power supply switch tube is directly connected with the output end of the battery power supply module and supplies power to the outside; the control end of the emergency power supply switch tube is directly connected with the output end of the battery power supply module; one end of the movable end of the emergency power supply switch tube is used as an emergency control signal output port of the emergency power supply module and outputs an emergency control signal.
The emergency power supply switch tube is a P-channel MOS tube.
The emergency power supply automatic switching circuit also comprises an emergency power supply diode; the emergency power supply diode may be a stand-alone diode or a body diode inside the switching tube; the emergency power supply diode is connected with the emergency power supply switch tube in parallel, and the anode of the emergency power supply diode is connected with the emergency power supply connection interface.
The utility model also provides an electronic equipment, this electronic equipment has included foretell emergency power source automatic switch-over circuit.
The utility model provides a this kind of emergency power source automatic switch-over circuit and electronic equipment thereof, through the circuit design of pure analog circuit, realized the power automatic switch-over after emergency power source inserts the circuit, the circuit device kind is few moreover, and the device is small in quantity, and the consumption of circuit is lower, low cost and reliability height.
Drawings
Fig. 1 is a functional block diagram of the present invention.
Fig. 2 is a schematic diagram of the circuit principle of the present invention.
Detailed Description
Fig. 1 shows a functional block diagram of the present invention: the utility model provides an automatic switching circuit of an emergency power supply, which comprises an emergency power supply connection interface, a battery power supply module, a battery power supply control module and an emergency power supply module; the battery is connected with the battery power supply module; the emergency power supply connecting interface is connected with an emergency power supply module; the output end of the battery power supply module is in short circuit with the output end of the emergency power supply module and supplies power to the outside; the control end of the battery power supply module is connected with the output end of the battery power supply control module; the emergency power supply module also outputs an emergency control signal and is connected to the input end of the battery power supply control module; the battery outputs power supply electric energy through the battery power supply module and supplies power; the emergency power supply is connected with the circuit through the emergency power supply connecting interface, and outputs power supply electric energy through the emergency power supply module and supplies power; when the emergency power supply is connected with the emergency power supply connection interface, the emergency power supply module outputs an emergency control signal to the battery power supply control module; the battery power supply control module outputs a power supply switching control signal to the battery power supply control module according to the input emergency control signal; and the battery power supply control module disconnects the power supply channel of the battery after receiving the power supply switching control signal, so that the independent power supply of the emergency power supply is realized.
Fig. 2 shows a schematic diagram of the circuit principle of the present invention: in the figure, the battery power supply module comprises a battery power supply first switch tube Q1 and a battery power supply second switch tube Q2; one end of the movable end of the first switch tube powered by the battery is connected with the output end of the battery, the other end of the movable end of the first switch tube powered by the battery is connected with the other end of the movable end of the second switch tube powered by the battery, and one end of the movable end of the second switch tube powered by the battery is used as the output end of the battery power supply module to supply power to the outside; the control end of the first battery-powered switch tube and the control end of the second battery-powered switch tube are both connected with the output end of the battery-powered control module; the other end of the battery BT1 was directly grounded.
The battery power supply control module comprises a power supply control first resistor R1 and a power supply control second resistor R2; one end of the power supply control first resistor is connected with the other end of the movable end of the battery power supply first switch tube, the other end of the power supply control first resistor is connected with one end of the power supply control second resistor, and the other end of the power supply control second resistor is grounded; the other end of the power supply control first resistor is the output end of the battery power supply control module and outputs a power supply switching control signal; one end of the power supply control second resistor is an input end of the battery power supply control module, is connected with the emergency power supply module and acquires an emergency control signal output by the emergency power supply module.
The emergency power supply module comprises an emergency power supply switch tube Q3; one end of the movable end of the emergency power supply switch tube is connected with the emergency power supply connection interface, and the other end of the movable end of the emergency power supply switch tube is directly connected with the output end of the battery power supply module and supplies power to the outside; the control end of the emergency power supply switch tube is directly connected with the output end of the battery power supply module; one end of the movable end of the emergency power supply switch tube is used as an emergency control signal output port of the emergency power supply module and outputs an emergency control signal.
In specific implementation, the emergency power supply switch tube is a P-channel MOS tube; the first switch tube powered by the battery and the second switch tube powered by the battery are P-channel MOS tubes; the resistance values of the power supply control first resistor and the power supply control second resistor are not less than 1M ohm; the battery-powered first diode and the battery-powered second diode can be independent diodes or internal body diodes of the P-channel MOS tube; the emergency power supply diode can be a stand-alone diode or an internal body diode of a P-channel MOS transistor.
The working process of the utility model is as follows: when an external emergency power supply is not connected into the circuit through the emergency power supply connection interface, the control ends of the switching tubes Q1 and Q2 are pulled down to be low level through the resistor R2, so that the Q1 and the Q2 are conducted, and the battery is connected with an internal control system through the Q1 and the Q2 and supplies power; meanwhile, the control end of the switching tube Q3 is at high level, and Q3 is cut off; when an external emergency power supply is connected to the circuit through the emergency power supply connection interface, the drain of the switching tube Q3 is at a high level (the output voltage of the emergency power supply), and the control ends of the switching tubes Q1 and Q2 are pulled high to be at a high level; therefore, the switching tubes Q1 and Q2 are turned off, and the power supply path of the battery is cut off, so that the control terminal of the switching tube Q3 becomes low; at this time, the switching tube Q3 is turned on, and the emergency power supply is connected to the internal control system through the Q3 and supplies power.
Because the circuits of the utility model are all analog devices, the reaction speed of the circuits is very fast; and the circuit has less types of devices, less quantity, large resistance value of the resistor and small leakage current of the MOS tube, so the power consumption of the circuit is extremely low.
Claims (6)
1. An automatic switching circuit of an emergency power supply is characterized by comprising an emergency power supply connecting interface, a battery power supply module, a battery power supply control module and an emergency power supply module; the battery is connected with the battery power supply module; the emergency power supply connecting interface is connected with an emergency power supply module; the output end of the battery power supply module is in short circuit with the output end of the emergency power supply module and supplies power to the outside; the control end of the battery power supply module is connected with the output end of the battery power supply control module; the emergency power supply module also outputs an emergency control signal and is connected to the input end of the battery power supply control module; the battery outputs power supply electric energy through the battery power supply module and supplies power; the emergency power supply is connected with the circuit through the emergency power supply connecting interface, and outputs power supply electric energy through the emergency power supply module and supplies power; when the emergency power supply is connected with the emergency power supply connection interface, the emergency power supply module outputs an emergency control signal to the battery power supply control module; the battery power supply control module outputs a power supply switching control signal to the battery power supply control module according to the input emergency control signal; the battery power supply control module disconnects a power supply channel of the battery after receiving the power supply switching control signal, so that the independent power supply of the emergency power supply is realized; the battery power supply module comprises a first switch tube and a second switch tube, wherein the first switch tube is powered by a battery; one end of the movable end of the first switch tube powered by the battery is connected with the output end of the battery, the other end of the movable end of the first switch tube powered by the battery is connected with the other end of the movable end of the second switch tube powered by the battery, and one end of the movable end of the second switch tube powered by the battery is used as the output end of the battery power supply module to supply power to the outside; the control end of the first battery-powered switch tube and the control end of the second battery-powered switch tube are both connected with the output end of the battery-powered control module; the other end of the battery is directly grounded; the emergency power supply automatic switching circuit also comprises a battery-powered first diode and a battery-powered second diode; the battery power supply first diode is connected with the battery power supply first switch tube in parallel, the battery power supply second diode is connected with the battery power supply second switch tube in parallel, the anode of the battery power supply first diode is connected with the output end of the battery, and the anode of the battery power supply second diode is connected with the output end of the battery power supply module; the battery power supply control module comprises a power supply control first resistor and a power supply control second resistor; one end of the power supply control first resistor is connected with the other end of the movable end of the battery power supply first switch tube, the other end of the power supply control first resistor is connected with one end of the power supply control second resistor, and the other end of the power supply control second resistor is grounded; the other end of the power supply control first resistor is the output end of the battery power supply control module and outputs a power supply switching control signal; one end of the power supply control second resistor is an input end of the battery power supply control module, is connected with the emergency power supply module and acquires an emergency control signal output by the emergency power supply module; the emergency power supply module comprises an emergency power supply switch tube; one end of the movable end of the emergency power supply switch tube is connected with the emergency power supply connection interface, and the other end of the movable end of the emergency power supply switch tube is directly connected with the output end of the battery power supply module and supplies power to the outside; the control end of the emergency power supply switch tube is directly connected with the output end of the battery power supply module; one end of the movable end of the emergency power supply switch tube is used as an emergency control signal output port of the emergency power supply module and outputs an emergency control signal.
2. The automatic emergency power switching circuit of claim 1 wherein the first battery-powered switching transistor and the second battery-powered switching transistor are P-channel MOS transistors.
3. The automatic emergency power switching circuit of claim 2 wherein the first power control resistor and the second power control resistor are each no less than 1M ohms.
4. The automatic switching circuit of emergency power supply according to claim 3, wherein the emergency power supply switching device is a P-channel MOS device.
5. The automatic emergency power switching circuit of claim 4 further comprising an emergency power supply diode; the emergency power supply diode is connected with the emergency power supply switch tube in parallel, and the anode of the emergency power supply diode is connected with the emergency power supply connection interface.
6. An electronic device, characterized in that it comprises an emergency power supply automatic switching circuit according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920463254.5U CN210517885U (en) | 2019-04-08 | 2019-04-08 | Emergency power supply automatic switching circuit and electronic equipment thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920463254.5U CN210517885U (en) | 2019-04-08 | 2019-04-08 | Emergency power supply automatic switching circuit and electronic equipment thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210517885U true CN210517885U (en) | 2020-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920463254.5U Expired - Fee Related CN210517885U (en) | 2019-04-08 | 2019-04-08 | Emergency power supply automatic switching circuit and electronic equipment thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210517885U (en) |
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2019
- 2019-04-08 CN CN201920463254.5U patent/CN210517885U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200512 |
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| CF01 | Termination of patent right due to non-payment of annual fee |