CN220692836U - Standby power supply switching device and power supply system - Google Patents
Standby power supply switching device and power supply system Download PDFInfo
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- CN220692836U CN220692836U CN202320717227.2U CN202320717227U CN220692836U CN 220692836 U CN220692836 U CN 220692836U CN 202320717227 U CN202320717227 U CN 202320717227U CN 220692836 U CN220692836 U CN 220692836U
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- 230000005611 electricity Effects 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 239000003990 capacitor Substances 0.000 claims description 35
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052744 lithium Inorganic materials 0.000 abstract description 9
- 239000002699 waste material Substances 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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 provides a standby power supply switching device and a power supply system, wherein the switching device comprises a relay, a low-voltage power supply, a detection circuit, a controller and a switch control circuit; the detection circuit is used for detecting the current state parameter of the standby power supply; the controller is used for controlling the on/off of the switch control circuit according to the current state parameter, the electricity consumption peak period or the electricity consumption valley period; the relay is used for controlling the input state of the mains supply according to the on or off state of the switch control circuit; the utility model solves the problems of resource waste and high use cost of the lithium battery standby power supply in the prior art, and the standby power supply is powered by an external UPS by disconnecting the commercial power in the electricity consumption peak period and is powered by the external UPS by recovering the commercial power in the electricity consumption valley period, so that the gap in the electricity charge is obtained for the client by using the electricity charge gap of peak clipping and valley filling, the use cost of the standby power supply is reduced, and the problem of resource waste is avoided.
Description
Technical Field
The present utility model relates to the technical field of standby power, and in particular, to a standby power switching device and a power system.
Background
With the continuous development of the lithium battery industry, a lithium battery with the advantages of small volume, high energy density, wide use environment, long service life and the like is often used as a standby power supply in various fields; however, in actual operation, the standby power supply only starts to operate after the mains supply fails, so that the standby power supply can only operate for a few times in 1 year, and the lithium battery standby power supply only has 100-200 times of use in a quality guarantee period of 3-5 years; for the lithium battery standby power supply with the cycle life of more than 2000 times, the use scene is easy to cause serious resource waste; and the lithium battery also has the problem of higher cost, which is not beneficial to the popularization of the lithium battery standby power supply.
Therefore, the lithium battery standby power supply in the prior art has the problems of resource waste and high use cost, and is not beneficial to popularization.
Disclosure of Invention
Aiming at the defects existing in the prior art, the standby power supply switching device and the power supply system provided by the utility model solve the problems of resource waste and high use cost of the lithium battery standby power supply in the prior art.
In a first aspect, the present utility model provides a standby power switching device, the switching device comprising: the device comprises a relay, a low-voltage power supply, a detection circuit, a controller and a switch control circuit; the input end of the low-voltage power supply is connected with the output end of the external UPS and is used for converting the output voltage of the external UPS into a target voltage so that the target voltage provides electric energy for the relay; the detection circuit is respectively connected with the standby power supply and the controller and is used for detecting the current state parameter of the standby power supply when receiving the detection signal output by the controller; the controller and the switch control circuit are used for controlling the on/off of the switch control circuit according to the current state parameter, the electricity consumption peak period or the electricity consumption valley period; the first end of the coil of the relay is connected with the first end of the low-voltage power supply through the switch control circuit, the second end of the coil of the relay is connected with the second output end of the low-voltage power supply, the first end of the switch of the relay is connected with the mains supply output end, and the second end of the switch of the relay is connected with the first input end of the external UPS and used for controlling the input state of the mains supply according to the connection or disconnection of the switch control circuit.
Optionally, the switching device further includes: and the third end of the charging circuit is connected with the controller and is used for charging the standby power supply through the commercial power when receiving a charging signal output by the controller.
Optionally, the detection circuit includes: the first resistor, the second resistor, the third resistor, the fourth resistor, the fifth resistor, the first MOS tube and the second MOS tube; the grid of first MOS pipe passes through first resistance with the control end of controller links to each other, the first end of second resistance with the control end of controller links to each other, the second end of second resistance with the source ground of first MOS pipe, the drain electrode of first MOS pipe passes through the third resistance links to each other with stand-by power supply, the drain electrode of first MOS pipe still with the grid of second MOS pipe links to each other, the source of second MOS pipe with stand-by power supply links to each other, the drain electrode of second MOS pipe with the first end of fourth resistance links to each other, the second end of fourth resistance passes through fifth resistance ground, the second end of fourth resistance still with the controller links to each other.
Optionally, the charging circuit includes: the first capacitor, the rectifying module, the second capacitor and the third capacitor; the first input end of the rectifying module is connected with the first input end of the external UPS through the first capacitor, the second input end of the rectifying module is connected with the second input end of the external UPS, the first output end of the rectifying module, the first end of the second capacitor and the first end of the third capacitor are connected with the positive electrode end of the standby power supply, and the second output end of the rectifying module, the second end of the second capacitor and the second end of the third capacitor are connected with the negative electrode end of the standby power supply.
Optionally, the charging circuit further includes: a zener diode, a sixth resistor, and a seventh resistor; the first end of the zener diode and the first end of the sixth resistor are respectively connected with the positive electrode end of the standby power supply, the second end of the zener diode is connected with the negative electrode end of the standby power supply, the third end of the zener diode is connected with the second end of the sixth resistor, and the second end of the sixth resistor is also connected with the negative electrode end of the standby power supply through the seventh resistor.
Optionally, the charging circuit further includes: an eighth resistor and a fuse; the first end of the first capacitor is connected with the first input end of the external UPS through the fuse, the first end of the first capacitor is also connected with the first end of the eighth resistor, and the second end of the first capacitor is connected with the second end of the eighth resistor.
Optionally, the switch control circuit includes: a ninth resistor, a tenth resistor and a triode; the base of triode pass through ninth resistance with the controller links to each other, the base of triode still passes through tenth resistance ground connection, the projecting pole ground connection of triode, the collecting electrode of triode with low voltage power supply's first end links to each other, the collecting electrode of triode still with the coil first end of relay links to each other.
In a second aspect, the present utility model provides a power supply system, which includes the standby power switching device.
Optionally, the power supply system further includes: a backup power supply and a UPS; the first input end of the UPS is connected with the live wire output end of the mains supply through the switch end of the relay, the second input end of the UPS is connected with the zero line output end of the mains supply, the positive electrode output end of the standby power supply is connected with the third input end of the UPS, and the negative electrode output end of the standby power supply is connected with the fourth input end of the UPS.
Optionally, the power supply system further includes: an alternating current input main switch and a power frequency protection switch; the first end of the alternating current input main switch is connected with the live wire output end of the mains supply, the second end of the alternating current input main switch is connected with the zero line output end of the mains supply, the third end of the alternating current input main switch is connected with the first end of the switch of the relay, and the fourth end of the alternating current input main switch is connected with the second input end of the UPS; the first end of the power frequency protection switch is connected with the first output end of the UPS, the second end of the power frequency protection switch is connected with the second output end of the UPS, the third end of the power frequency protection switch is connected with the first input end of the low-voltage power supply, and the fourth end of the power frequency protection switch is connected with the second input end of the low-voltage power supply.
Compared with the prior art, the utility model has the following beneficial effects:
1. the utility model controls the relay to be electrified to turn off the normally closed switch in the power utilization peak period, and cuts off the commercial power to enable the standby power supply to supply power for the external UPS; the relay is controlled to lose electricity in the electricity consumption low-valley period to close the switch, and the commercial power is recovered to supply power to the external UPS, so that the gap in electricity charge is obtained for the client by using the gap in electricity charge of peak clipping and valley filling, and the use cost of the standby power supply is reduced; the utility model also increases the use times of the standby power supply and avoids the problem of resource waste.
2. The utility model discloses a detection circuitry monitors stand-by power supply's current state parameter, prevents stand-by power supply and does not satisfy stand-by power supply demand and appear the problem of losing power, has guaranteed stand-by power supply's power supply stability.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a standby power switching device according to an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of another standby power switching device according to an embodiment of the present utility model;
fig. 3 is a schematic circuit diagram of a detection circuit according to an embodiment of the present utility model;
fig. 4 is a schematic circuit diagram of a charging circuit according to an embodiment of the present utility model;
fig. 5 is a schematic circuit diagram of a switch control circuit according to an embodiment of the present utility model;
fig. 6 is a schematic structural diagram of a power supply system according to an embodiment of the present utility model.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.
The functional units of the same reference numerals in the examples of the present utility model have the same and similar structures and functions.
Example 1
Fig. 1 is a schematic structural diagram of a standby power switching device according to an embodiment of the present utility model, and as shown in fig. 1, a standby power switching device 100 according to the embodiment specifically includes:
relay 110, low voltage power supply 120, detection circuit 130, controller 140, and switch control circuit 150;
the input end of the low-voltage power supply 120 is connected to the output end of the external UPS200, and is configured to convert the output voltage of the external UPS200 into a target voltage, so that the target voltage provides electric energy for the relay 110;
the detection circuit 130 is respectively connected to the standby power supply 400 and the controller 140, and is configured to detect a current state parameter of the standby power supply 400 when receiving a detection signal output by the controller 140;
the controller 140 and the switch control circuit 150 are configured to control on or off of the switch control circuit 150 according to the current state parameter;
the first end of the coil of the relay 110 is connected to the first end of the low-voltage power supply 120 through the switch control circuit 150, the second end of the coil of the relay 110 is connected to the second output end of the low-voltage power supply 120, the first end of the switch of the relay 110 is connected to the mains output end 300, and the second end of the switch of the relay 110 is connected to the first input end of the external UPS200, so as to control the input state of the mains according to the on or off state of the switch control circuit 150.
It should be noted that, the working principle of the switching device of the standby power supply 400 provided by the present utility model is as follows: in the power consumption peak period, the controller 140 controls the switch control circuit 150 to be turned on, so that the low-voltage power supply 120 supplies power to the normally-closed relay 110, and the normally-closed relay 110 is powered off to disconnect the switch, thereby disconnecting the input of the mains supply and enabling the standby power supply 400 to supply power to the external UPS 200; in the electricity consumption valley period, the controller 140 controls the switch control circuit 150 to be opened, so that the low-voltage power supply 120 stops supplying power to the normally-closed relay 110, the normally-closed relay 110 loses power to close the switch, and the commercial power is recovered to supply power to the external UPS 200.
Further, the detection circuit 130 monitors the current state parameter of the standby power supply 400, the controller 140 determines that the current state parameter is lower than the early warning value, controls the switch control circuit 150 to be turned off, so that the low-voltage power supply 120 stops supplying power to the normally-closed relay 110, the normally-closed relay 110 is powered off to close the switch, and the mains supply is restored to supply power to the external UPS 200; wherein the external UPS200 may prefer mains supply when both mains and backup power 400 are simultaneously supplied.
It should be noted that, the controller 140 in this embodiment is a chip or a control circuit that can control the on or off of the switch control circuit 150 according to the current state parameter, the power consumption peak period or the power consumption valley period in the prior art, and the specific structure of the controller 140 is not the important point of protection of the present utility model; among them, the current state parameters in the present embodiment include, but are not limited to, the remaining capacity of the battery and the output voltage.
Compared with the prior art, the utility model has the following beneficial effects:
1. the utility model controls the relay to be electrified to turn off the normally closed switch in the power utilization peak period, and cuts off the commercial power to enable the standby power supply to supply power for the external UPS; the relay is controlled to lose electricity in the electricity consumption low-valley period to close the switch, and the commercial power is recovered to supply power to the external UPS, so that the gap in electricity charge is obtained for the client by using the gap in electricity charge of peak clipping and valley filling, and the use cost of the standby power supply is reduced; the utility model also increases the use times of the standby power supply and avoids the problem of resource waste.
2. The utility model discloses a detection circuitry monitors stand-by power supply's current state parameter, prevents stand-by power supply and does not satisfy stand-by power supply demand and appear the problem of losing power, has guaranteed stand-by power supply's power supply stability.
Example two
Fig. 2 is a schematic structural diagram of another standby power switching device according to an embodiment of the present utility model; as shown in fig. 2, in this embodiment, the switching device further includes:
the first end of the charging circuit 160 is connected to the first input end of the external UPS200, the second end of the charging circuit 160 is connected to the standby power 400, and the third end of the charging circuit 160 is connected to the controller, so as to charge the standby power through the utility power when receiving the charging signal output by the controller.
It should be noted that, in this embodiment, the controller sends the charging signal to the charging circuit in the electricity consumption valley period, so that the charging circuit charges the standby power supply through the mains supply, thereby reducing the charging cost of the standby power supply and facilitating the standby power supply to perform peak clipping and valley filling next time.
Example III
Fig. 3 is a schematic circuit diagram of a detection circuit according to an embodiment of the present utility model; as shown in fig. 3, in the present embodiment, the detection circuit includes:
the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, the first MOS tube Q1 and the second MOS tube Q2;
the grid of first MOS pipe Q1 passes through first resistance R1 with the control end of controller links to each other, second resistance R2's first end with the control end of controller links to each other, second resistance R2's second end with first MOS pipe Q1's source ground connection, first MOS pipe Q1's drain electrode passes through third resistance R3 links to each other with stand-by power supply, first MOS pipe Q1's drain electrode still with second MOS pipe Q2's grid links to each other, second MOS pipe Q2's source with stand-by power supply links to each other, second MOS pipe Q2's drain electrode with fourth resistance R4's first end links to each other, fourth resistance R4's second end passes through fifth resistance R5 ground connection, fourth resistance R4's second end still links to each other with the controller.
When the voltage of the standby power supply BAT needs to be measured, the control end of the controller outputs a high level, the first MOS tube and the second MOS tube are both conducted, the output voltage of the standby power supply BAT is output to the controller after being divided by the fourth resistor and the fifth resistor, and the output voltage of the standby power supply is detected.
Example IV
Fig. 4 is a schematic circuit diagram of a charging circuit according to an embodiment of the present utility model; as shown in fig. 4, the charging circuit includes:
the first capacitor C1, the rectifying module VD, the second capacitor C2 and the third capacitor C3;
the first input end of the rectification module VD is connected with the first input end of the external UPS through the first capacitor C1, the second input end of the rectification module VD is connected with the second input end of the external UPS, the first output end of the rectification module VD, the first end of the second capacitor C2 and the first end of the third capacitor C3 are connected with the positive end of the standby power supply, and the second output end of the rectification module VD, the second end of the second capacitor C2 and the second end of the third capacitor C3 are connected with the negative end of the standby power supply.
In this embodiment, the charging circuit further includes: a zener diode D1, a sixth resistor R6, and a seventh resistor R7; the first end of the zener diode D1 and the first end of the sixth resistor R6 are respectively connected with the positive terminal of the standby power supply, the second end of the zener diode D1 is connected with the negative terminal of the standby power supply, the third end of the zener diode D1 is connected with the second end of the sixth resistor R6, and the second end of the sixth resistor R6 is also connected with the negative terminal of the standby power supply through the seventh resistor R7.
In this embodiment, the charging circuit further includes: an eighth resistor R8 and a fuse FU; the first end of the first capacitor C1 is connected to the first input end of the external UPS through the fuse FU, the first end of the first capacitor C1 is further connected to the first end of the eighth resistor R8, and the second end of the first capacitor C1 is connected to the second end of the eighth resistor R8.
It should be noted that in this embodiment, the 220V ac voltage output by the mains supply is reduced by the first capacitor, rectified by the rectifying module, and filtered by the second capacitor, and then the standby power supply is charged; further, when the voltage of the standby power supply is lower than the on voltage of the zener diode, the zener diode is disconnected, and the current is fully charged into the battery; when the voltage of the standby power supply is higher than the conducting voltage of the voltage stabilizing diode, the voltage stabilizing diode is conducted to play a shunting role together with the sixth resistor and the seventh resistor, so that stable charging current is obtained, and the standby power supply is protected.
Example five
Fig. 5 is a schematic circuit diagram of a switch control circuit according to an embodiment of the present utility model; as shown in fig. 5, the switch control circuit includes:
a ninth resistor R9, a tenth resistor R10, and a transistor Q3;
the base of triode Q3 pass through ninth resistance R9 with the controller links to each other, triode Q3's base is still passed through tenth resistance R10 ground connection, triode Q3's projecting pole ground connection, triode Q3's collecting electrode with low-voltage power supply's first end links to each other, triode Q3's collecting electrode still with relay's coil first end links to each other.
It should be noted that, in this embodiment, the controller controls the on and off of the transistor to implement the on and off of the switch control circuit.
Example six
Fig. 6 is a schematic structural diagram of a power supply system according to an embodiment of the present utility model; as shown in fig. 6, the power supply system includes: the backup power supply switching apparatus, the backup power supply, and the UPS of any of the above embodiments one to five; the first input end of the UPS is connected with the live wire output end of the mains supply through the switch end of the relay, the second input end of the UPS is connected with the zero line output end of the mains supply, the positive electrode output end of the standby power supply is connected with the third input end of the UPS, and the negative electrode output end of the standby power supply is connected with the fourth input end of the UPS.
In this embodiment, the power supply system further includes: an alternating current input main switch and a power frequency protection switch; the first end of the alternating current input main switch is connected with the live wire output end of the mains supply, the second end of the alternating current input main switch is connected with the zero line output end of the mains supply, the third end of the alternating current input main switch is connected with the first end of the switch of the relay, and the fourth end of the alternating current input main switch is connected with the second input end of the UPS; the first end of the power frequency protection switch is connected with the first output end of the UPS, the second end of the power frequency protection switch is connected with the second output end of the UPS, the third end of the power frequency protection switch is connected with the first input end of the low-voltage power supply, and the fourth end of the power frequency protection switch is connected with the second input end of the low-voltage power supply.
In this embodiment, the utility power input end is connected in series with a normally closed relay, the normally closed relay is controlled by the controller, and the controller controls the normally closed relay according to the actual SOC and voltage difference of the standby power supply; the input of the commercial power is disconnected at the power consumption peak section, the standby power supply enters a working state, and the relay is closed within reasonable standby power time (the residual electric quantity of the standby power supply still meets the SOC of the standby power supply), so that the commercial power supply is recovered; and the controller controls the charging loop of the standby power supply to be disconnected, and then takes the valley period time as the charging loop as the recovery time as the control to carry out valley period charging on the standby power supply.
In this embodiment, when the peak section needs to be powered on automatically, the controller controls the normally-closed relay to be disconnected, the mains supply input is cut off, the standby power supply enters into a standby power working mode under the control of the UPS, when the standby power supply is powered on for a certain time (judged according to the SOC and the voltage), the controller stops controlling the normally-closed relay to be attracted, the mains supply input is recovered, the UPS is recovered to the mains power working mode, at this time, the controller disconnects the charging loop, the peak section or the flat section is avoided to charge the standby power supply, the controller sets the valley section as the recovery time of the charging loop, the valley section is filled with the consumed electric quantity of the standby power supply, so that the next peak cut and valley cut of the standby power supply are facilitated, the difference in the electricity charge is obtained for the client side by the peak cut and valley fill (the average of the electricity charge of the peak section and the valley Duan Dianjia is 6-hair 1 degree), the service life of the standby power supply is reasonably utilized (the service life of the standby power supply is more than 2000), the problem that the use frequency of the standby power supply at the client is reduced is avoided.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the utility model to enable those skilled in the art to understand or practice the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A standby power switching device, the switching device comprising:
the device comprises a relay, a low-voltage power supply, a detection circuit, a controller and a switch control circuit;
the input end of the low-voltage power supply is connected with the output end of the external UPS and is used for converting the output voltage of the external UPS into a target voltage so that the target voltage provides electric energy for the relay;
the detection circuit is respectively connected with the standby power supply and the controller and is used for detecting the current state parameter of the standby power supply when receiving the detection signal output by the controller;
the controller and the switch control circuit are used for controlling the on/off of the switch control circuit according to the current state parameter, the electricity consumption peak period or the electricity consumption valley period;
the first end of the coil of the relay is connected with the first end of the low-voltage power supply through the switch control circuit, the second end of the coil of the relay is connected with the second output end of the low-voltage power supply, the first end of the switch of the relay is connected with the mains supply output end, and the second end of the switch of the relay is connected with the first input end of the external UPS and used for controlling the input state of the mains supply according to the connection or disconnection of the switch control circuit.
2. The backup power switching device of claim 1, wherein the switching device further comprises:
and the third end of the charging circuit is connected with the controller and is used for charging the standby power supply through the commercial power when receiving a charging signal output by the controller.
3. The backup power switching apparatus as claimed in claim 1, wherein the detection circuit includes:
the first resistor, the second resistor, the third resistor, the fourth resistor, the fifth resistor, the first MOS tube and the second MOS tube;
the grid of first MOS pipe passes through first resistance with the control end of controller links to each other, the first end of second resistance with the control end of controller links to each other, the second end of second resistance with the source ground of first MOS pipe, the drain electrode of first MOS pipe passes through the third resistance links to each other with stand-by power supply, the drain electrode of first MOS pipe still with the grid of second MOS pipe links to each other, the source of second MOS pipe with stand-by power supply links to each other, the drain electrode of second MOS pipe with the first end of fourth resistance links to each other, the second end of fourth resistance passes through fifth resistance ground, the second end of fourth resistance still with the controller links to each other.
4. The backup power switching apparatus as claimed in claim 2, wherein the charging circuit includes:
the first capacitor, the rectifying module, the second capacitor and the third capacitor;
the first input end of the rectifying module is connected with the first input end of the external UPS through the first capacitor, the second input end of the rectifying module is connected with the second input end of the external UPS, the first output end of the rectifying module, the first end of the second capacitor and the first end of the third capacitor are connected with the positive electrode end of the standby power supply, and the second output end of the rectifying module, the second end of the second capacitor and the second end of the third capacitor are connected with the negative electrode end of the standby power supply.
5. The backup power switching apparatus as claimed in claim 4, wherein the charging circuit further comprises:
a zener diode, a sixth resistor, and a seventh resistor;
the first end of the zener diode and the first end of the sixth resistor are respectively connected with the positive electrode end of the standby power supply, the second end of the zener diode is connected with the negative electrode end of the standby power supply, the third end of the zener diode is connected with the second end of the sixth resistor, and the second end of the sixth resistor is also connected with the negative electrode end of the standby power supply through the seventh resistor.
6. The backup power switching apparatus of claim 5 wherein said charging circuit further comprises:
an eighth resistor and a fuse;
the first end of the first capacitor is connected with the first input end of the external UPS through the fuse, the first end of the first capacitor is also connected with the first end of the eighth resistor, and the second end of the first capacitor is connected with the second end of the eighth resistor.
7. The standby power switching device according to claim 6, wherein the switch control circuit includes:
a ninth resistor, a tenth resistor and a triode;
the base of triode pass through ninth resistance with the controller links to each other, the base of triode still passes through tenth resistance ground connection, the projecting pole ground connection of triode, the collecting electrode of triode with low voltage power supply's first end links to each other, the collecting electrode of triode still with the coil first end of relay links to each other.
8. A power supply system, characterized in that it comprises a stand-by power supply switching device according to any one of claims 1-7.
9. The power system of claim 8, wherein the power system further comprises:
a backup power supply and a UPS; the first input end of the UPS is connected with the live wire output end of the mains supply through the switch end of the relay, the second input end of the UPS is connected with the zero line output end of the mains supply, the positive electrode output end of the standby power supply is connected with the third input end of the UPS, and the negative electrode output end of the standby power supply is connected with the fourth input end of the UPS.
10. The power system of claim 9, wherein the power system further comprises:
an alternating current input main switch and a power frequency protection switch;
the first end of the alternating current input main switch is connected with the live wire output end of the mains supply, the second end of the alternating current input main switch is connected with the zero line output end of the mains supply, the third end of the alternating current input main switch is connected with the first end of the switch of the relay, and the fourth end of the alternating current input main switch is connected with the second input end of the UPS;
the first end of the power frequency protection switch is connected with the first output end of the UPS, the second end of the power frequency protection switch is connected with the second output end of the UPS, the third end of the power frequency protection switch is connected with the first input end of the low-voltage power supply, and the fourth end of the power frequency protection switch is connected with the second input end of the low-voltage power supply.
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| CN202320717227.2U CN220692836U (en) | 2023-04-04 | 2023-04-04 | Standby power supply switching device and power supply system |
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| CN202320717227.2U CN220692836U (en) | 2023-04-04 | 2023-04-04 | Standby power supply switching device and power supply system |
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