CN214479812U - Automatic switching power supply device - Google Patents
Automatic switching power supply device Download PDFInfo
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- CN214479812U CN214479812U CN202120395299.0U CN202120395299U CN214479812U CN 214479812 U CN214479812 U CN 214479812U CN 202120395299 U CN202120395299 U CN 202120395299U CN 214479812 U CN214479812 U CN 214479812U
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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 power supply unit, including electric quantity detecting element, electrical unit and main control unit, electrical unit is connected with electric quantity detecting element and main control unit respectively, and main control unit is connected with electric quantity detecting element and electrical unit respectively, and electrical unit includes the main power supply, stand-by power supply and switching circuit, and the main power supply is connected with electric quantity detecting element, and the switching circuit is connected with stand-by power supply and main control unit, and the switching circuit includes MOS nest of tubes, and the MOS nest of tubes includes first MOS pipe, the second MOS pipe, third MOS pipe and fourth MOS pipe. The electronic lock has the advantages that the main power supply or the standby power supply is adopted as the power supply, the service life of the electronic lock is prolonged, and when the main power supply is pulled out or the electric quantity of the main power supply is low, the electronic lock can be automatically switched to the standby power supply for supplying power, so that the electronic lock can continuously work.
Description
Technical Field
The utility model belongs to the technical field of the power, more specifically say, the utility model relates to an automatic switch-over power technical field.
Background
The application number 201821242207.X discloses an intelligent lock with double power supplies for automatic switching, which comprises a standby battery pack arranged in a lock body, a comparison device coupled to a main battery pack to receive signals of the main battery pack in real time and output comparison signals, a reference circuit coupled to the comparison device to provide reference signals, and a switching device coupled to the comparison device to receive the comparison signals and output switching signals to control the on and off of a loop where the standby battery pack is located. Once the electric quantity of the main storage battery pack is insufficient, the standby battery pack automatically continues to run for supplying power.
Therefore, the application can only automatically switch to the standby power supply when the electric quantity of the main power supply is low, and cannot solve the technical problem that the main power supply is automatically switched to the standby power supply when being pulled out.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an automatic switching power supply unit to the main power source who exists among the solution prior art can't automatic switch over to stand-by power supply's technical problem when extracting.
In order to realize the technical purpose, the utility model discloses a technical scheme as follows:
the utility model provides an automatic switching power supply unit, includes electric quantity detecting element, electrical unit and main control unit, the electrical unit respectively with the electric quantity detecting element reaches the main control unit is connected, the main control unit respectively with the electric quantity detecting element reaches the electrical unit is connected, its characterized in that, the electrical unit includes main power supply, stand-by power supply and switching circuit, the main power supply with the electric quantity detecting element is connected, switching circuit with stand-by power supply reaches the main control unit is connected, switching circuit includes the MOS nest of tubes, the MOS nest of tubes includes first MOS pipe, second MOS pipe, third MOS pipe and fourth MOS pipe.
Preferably, the S pole of the first MOS transistor is connected to the positive pole of the standby power supply, and the D pole of the first MOS transistor is connected to the G pole of the second MOS transistor; the S pole of the second MOS tube is connected with the anode of the standby power supply, and the D pole of the second MOS tube is connected with the anode of the main power supply; the S pole of the third MOS tube is connected with the negative pole of the main power supply, the D pole of the third MOS tube is connected with the G pole of the fourth MOS tube, and the G pole of the third MOS tube is connected with the main control unit; the S pole of the fourth MOS tube is connected with the anode of the standby power supply, and the G pole of the fourth MOS tube is connected with the D pole of the third MOS tube.
Preferably, the switching circuit further comprises a plurality of resistors.
Preferably, the switching circuit further includes an energy storage capacitor, one end of the energy storage capacitor is connected to the positive electrode of the standby power supply, and the other end of the energy storage capacitor is connected to the resistor.
Preferably, the primary power source is a lithium battery.
Preferably, the backup power supply is a portable power supply device.
Preferably, the portable power supply device is a lithium battery or a dry battery.
Preferably, the power supply further comprises an electrical appliance, and the electrical appliance is respectively connected with the main power supply, the main control unit and the switching circuit.
Preferably, the electrical appliance further comprises a power input connected to the main power supply.
Preferably, the electric appliance is an electronic lock.
The utility model provides a beneficial effect lies in:
1. the main power supply or the standby power supply is used as the power supply to supply power, the service life of the electronic lock is prolonged, and when the main power supply is pulled out or the electric quantity of the main power supply is low, the electronic lock can be automatically switched to the standby power supply to supply power, so that the electronic lock can continuously work.
2. When the main power supply is pulled out, the system can be automatically powered off and reset once, namely, the main power supply can be pulled out when the system is halted or works abnormally, and the system automatically restarts, resets and restores to normal.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
FIG. 1 is a schematic structural diagram of an automatic switching power supply apparatus according to an embodiment;
FIG. 2 is a schematic diagram of a switching circuit according to embodiment 1;
fig. 3 is a schematic structural diagram of a switching circuit in embodiment 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1:
as shown in fig. 1, in this embodiment, an automatic switching power supply device includes an electric quantity detection unit, a power supply unit, and a main control unit, where the power supply unit is connected to the electric quantity detection unit and the main control unit, the main control unit is connected to the electric quantity detection unit and the power supply unit, the power supply unit includes a main power supply, a standby power supply, and a switching circuit, the main power supply is connected to the electric quantity detection unit, and the switching circuit is connected to the standby power supply and the main control unit.
The switching circuit further comprises a plurality of resistors which are divider resistors, the switching circuit further comprises an energy storage capacitor, one end of the energy storage capacitor is connected with the anode of the standby power supply, and the other end of the energy storage capacitor is connected with the resistor.
The switching circuit comprises an MOS tube group, the MOS tube group comprises a first MOS tube, a second MOS tube, a third MOS tube and a fourth MOS tube, the S pole of the first MOS tube is connected with the anode of the standby power supply, the D pole of the first MOS tube is connected with the G pole of the second MOS tube, and the G pole of the first MOS tube is connected with the divider resistor; the S pole of the second MOS tube is connected with the anode of the standby power supply, the D pole of the second MOS tube is connected with the anode of the main power supply, and the G pole of the second MOS tube is connected with the divider resistor; the S pole of the third MOS tube is connected with the negative pole of the main power supply, the D pole of the third MOS tube is connected with the G pole of the fourth MOS tube, and the G pole of the third MOS tube is connected with the main control unit; the S pole of the fourth MOS tube is connected with the anode of the standby power supply, the D pole of the fourth MOS tube is connected with the divider resistor, and the G pole of the fourth MOS tube is connected with the D pole of the third MOS tube.
The main power supply is a lithium battery, the standby power supply is portable power supply equipment, the portable power supply equipment is a lithium battery or a dry battery, and the electric appliance is an electronic lock. The automatic switching power supply device also comprises an electrical appliance, the electrical appliance is respectively connected with the main power supply, the main control unit and the switching circuit, the electrical appliance also comprises a power supply input end, the power supply input end is connected with the main power supply, and the electrical appliance is an electronic lock.
As shown in fig. 2, VBAT1 is the positive pole of the main power source, VBAT2 is the positive pole of the backup power source, GND _ a is the negative poles of the main power source and the backup power source, which are also the negative poles of the whole electronic lock system, and GND _ B is separately connected to the negative pole of the main power source. When the main power supply is connected into the electronic lock, the GND _ B is connected with the GND _ A; when the main power supply is pulled out, GND _ B is in a floating state. The main power supply comprises two negative electrode pins which are respectively a first negative electrode pin and a second negative electrode pin, and the two negative electrode pins are electrically connected inside. The first negative pin corresponds to GND _ A, the second negative pin corresponds to GND _ B, and the negative electrode of the standby power supply is connected with GND _ A.
The maximum starting voltage of the MOS tube is Vth, the voltage difference between the G pole and the S pole of the MOS tube Q is Vgs, when the main power supply is connected into the electronic lock, GND _ A and GND _ B are both connected to the negative pole of the main power supply, the voltage V1 at the point of (the) between the voltage-dividing resistor R1 and the voltage-dividing resistor R2 is VBAT 2R 2/(R1+ R2), the Vgs of the first MOS tube is-VBAT 2R 1/(R1+ R2), the values of the voltage-dividing resistor R1 and the voltage-dividing resistor R2 are adjusted, so that the | Vgs | of the first MOS tube is larger than the starting voltage | Vth | of the first MOS tube, and the first MOS tube is opened; the voltage V2 at the point between the voltage dividing resistor R5 and the voltage dividing resistor R6 is VBAT2, VGS of the second MOS transistor is 0V, the second MOS transistor is turned off, at this time, the positive electrode VBAT2 of the standby power supply is not connected to the positive electrode VBAT1 of the main power supply, and the system power supply is used for supplying power to the main power supply.
When the main control unit detects that the electric quantity of the main power supply is too low through the electric quantity detection unit, the G pole of the third MOS tube is controlled, the third MOS tube is opened, the values of a voltage division resistor R7 and a voltage division resistor R8 are adjusted to enable | Vgs | of the fourth MOS tube to be larger than the opening voltage | Vth | of the fourth MOS tube, the fourth MOS tube is opened, at the moment, the point voltage V1 is equal to VBAT2, the Vgs of the first MOS tube is equal to 0V, the first MOS tube is closed, the point voltage V2 is equal to VBAT 2R 6/(R4+ R6), the Vgs-VBAT 2R 45/(R4 + R6) of the second MOS tube is equal to VBAT2 | R6, the point voltage V is equal to VBAT 7342 + R6), the value of the second MOS tube is equal to VBAT 8284R 45/(R4 + R6), the values of the voltage division resistor R4 and the voltage division resistor R6 are adjusted to enable | of the Vgs | of the second MOS tube to be larger than the opening voltage | of the second MOS tube, the opening voltage | of the second MOS tube is opened, the backup power supply, the positive pole VBAT2 of the backup power supply, and at 3985 is connected to the whole main power supply system.
When the main power supply is pulled out, the GND _ B is in a suspended state, at this time, the point voltage V1 is equal to VBAT2, the Vgs of the first MOS transistor is equal to 0V, the first MOS transistor is turned off, the second MOS transistor is turned on, the positive electrode VBAT2 of the standby power supply is communicated with the positive electrode VBAT1 of the main power supply, and at this time, the whole electronic lock system is supplied with power through the standby power supply.
When the main power supply is just pulled out, the energy storage capacitor C1 keeps discharging for a period of time through the voltage division resistor R1, the first MOS tube keeps in an open state during the period of time, the second MOS tube is in a closed state, and the electronic lock is in a power-off state because the main power supply is pulled out during the period of time, so that the function of pulling out the main power supply to reset the whole lock is achieved. The voltage when the main power supply is not pulled out is an initial voltage value Vc0 at two ends of the energy storage capacitor C1, Vc0 is VBAT 2R 1/(R1+ R2), the voltage value which can be finally put at two ends of the energy storage capacitor C1 is Vc1, and Vc1 is close to 0V. the voltage across the energy storage capacitor C1 at time t has a value Vct. According to a charge-discharge formula of the capacitor, namely Vct 0+ (Vc1-Vc0) [1-exp (-t/RC) ], and t-RC lnn [ (Vc1-Vc0)/(Vc1-Vct) ], the discharge time t of the energy storage capacitor can be roughly calculated, the discharge time t of the energy storage capacitor is the power-off reset time of the electronic lock, and the reset time can be adjusted by adjusting the values of C1 and R1.
Example 2:
When the main power supply is connected to the electronic lock, the | Vgs | of the third MOS transistor is greater than the turn-on voltage | Vth | of the third MOS transistor, and the third MOS transistor is turned on, then in the figure, the voltage V1 at the point between the voltage dividing resistor R1 and the voltage dividing resistor R2 is VBAT2 ═ R2/(R1+ R2), the Vgs of the first MOS transistor is-VBAT 2 ═ R1/(R1+ R2), the values of the voltage dividing resistor R1 and the voltage dividing resistor R2 are adjusted, so that the | Vgs | of the first MOS transistor is greater than the turn-on voltage | Vth | of the first MOS transistor, the first MOS transistor is turned on, the voltage V2 at the point between the voltage dividing resistor R5 and the voltage dividing resistor R6 is VBAT2, the Vgs of the second MOS transistor is 0V, the second MOS transistor is turned off, and at this time, the positive electrode VBAT2 of the backup power supply is not connected to the VBAT1, and the main power supply system is the main power supply.
When the main control unit detects that the electric quantity of the main power supply is too low through the electric quantity detection unit, the G pole of the fourth MOS tube is controlled, the fourth MOS tube is opened, Vgs of the third MOS tube is 0V, the third MOS tube is turned off, at the moment, the point voltage V1 is VBAT2, Vgs of the first MOS tube is 0V, and the first MOS tube is turned off; voltage V2 ═ VBAT2 × R6/(R4+ R6), Vgs ═ VBAT2 × R4/(R4+ R6) of the second MOS transistor, values of the voltage dividing resistor R4 and the voltage dividing resistor R6 are adjusted, so that | Vgs | of the second MOS transistor is greater than the turn-on voltage | Vth | of the second MOS transistor, the second MOS transistor is turned on, the positive electrode VBAT2 of the backup power supply is communicated with the positive electrode VBAT1 of the main power supply, and at this time, the backup power supply supplies power to the whole electronic lock system.
When the main power supply is pulled out, the Vgs of the third MOS transistor is 0V, the third MOS transistor is turned off, at this time, the point voltage V1 is VBAT2, the Vgs of the first MOS transistor is 0V, the first MOS transistor is turned off, the second MOS transistor is turned on, the positive electrode VBAT2 of the backup power supply is communicated with the positive electrode VBAT1 of the main power supply, and at this time, the backup power supply supplies power to the whole electronic lock system.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (10)
1. The utility model provides an automatic switching power supply unit, includes electric quantity detecting element, electrical unit and main control unit, the electrical unit respectively with the electric quantity detecting element reaches the main control unit is connected, the main control unit respectively with the electric quantity detecting element reaches the electrical unit is connected, its characterized in that, the electrical unit includes main power supply, stand-by power supply and switching circuit, the main power supply with the electric quantity detecting element is connected, switching circuit with stand-by power supply reaches the main control unit is connected, switching circuit includes the MOS nest of tubes, the MOS nest of tubes includes first MOS pipe, second MOS pipe, third MOS pipe and fourth MOS pipe.
2. The automatic switching power supply device according to claim 1, wherein an S-pole of the first MOS transistor is connected to a positive pole of the standby power supply, and a D-pole of the first MOS transistor is connected to a G-pole of the second MOS transistor; the S pole of the second MOS tube is connected with the anode of the standby power supply, and the D pole of the second MOS tube is connected with the anode of the main power supply; the S pole of the third MOS tube is connected with the negative pole of the main power supply, the D pole of the third MOS tube is connected with the G pole of the fourth MOS tube, and the G pole of the third MOS tube is connected with the main control unit; the S pole of the fourth MOS tube is connected with the anode of the standby power supply, and the G pole of the fourth MOS tube is connected with the D pole of the third MOS tube.
3. The automatic switching power supply apparatus according to claim 1, wherein said switching circuit further comprises a plurality of resistors.
4. The automatic switching power supply device according to claim 3, wherein said switching circuit further comprises an energy storage capacitor, one end of said energy storage capacitor is connected to the positive electrode of said backup power supply, and the other end of said energy storage capacitor is connected to said resistor.
5. The automatic switching power supply apparatus according to claim 1, wherein said main power supply is a lithium battery.
6. The automatic switching power supply apparatus according to claim 1, wherein said backup power supply is a portable power supply device.
7. The automatic switching power supply unit according to claim 6, wherein said portable power supply device is a lithium battery or a dry battery.
8. The automatic switching power supply device according to claim 1, further comprising an electrical appliance, wherein the electrical appliance is connected to the main power supply, the main control unit and the switching circuit, respectively.
9. The automatic switching power supply apparatus according to claim 8, wherein said electric consumer further comprises a power input terminal, said power input terminal being connected to said main power supply.
10. The automatic switching power supply device according to claim 8, wherein the electric appliance is an electronic lock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120395299.0U CN214479812U (en) | 2021-02-22 | 2021-02-22 | Automatic switching power supply device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120395299.0U CN214479812U (en) | 2021-02-22 | 2021-02-22 | Automatic switching power supply device |
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| CN214479812U true CN214479812U (en) | 2021-10-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114825589A (en) * | 2022-05-12 | 2022-07-29 | 高新兴物联科技有限公司 | Main and standby power supply switching circuit and electronic equipment |
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2021
- 2021-02-22 CN CN202120395299.0U patent/CN214479812U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114825589A (en) * | 2022-05-12 | 2022-07-29 | 高新兴物联科技有限公司 | Main and standby power supply switching circuit and electronic equipment |
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