CN211790932U - Standby power supply circuit and power supply device - Google Patents
Standby power supply circuit and power supply device Download PDFInfo
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- CN211790932U CN211790932U CN202020424248.1U CN202020424248U CN211790932U CN 211790932 U CN211790932 U CN 211790932U CN 202020424248 U CN202020424248 U CN 202020424248U CN 211790932 U CN211790932 U CN 211790932U
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Abstract
The utility model provides a reserve power supply circuit and power supply unit, wherein, reserve power supply circuit includes outage detection circuitry, activation circuit, a controller, reserve battery management circuit, first group battery and power conversion circuit, when alternating current power supply outage, outage detection circuitry among the reserve power supply circuit sends outage detection signal, activation circuit starts, and send activation signal to controller and reserve battery management circuit, controller and outage detection circuit successively activate, and confirm the outage of main power supply circuit when not gathering the first direct current signal of main power supply circuit's output, the controller controls the first group battery to discharge and control power conversion circuit output and the direct current output end of the direct current output end correspondence size of main power supply circuit to the direct current output end of main power supply circuit, thereby switch over to reserve power supply circuit power supply, realize redundant power supply, the utility model discloses reserve power supply circuit simple structure, Low cost and is suitable for various occasions.
Description
Technical Field
The utility model belongs to the technical field of power supply circuit, especially, relate to a reserve power supply circuit and power supply unit.
Background
With the development of technology, more and more industrial places adopt redundant power supply circuits to supply power so as to ensure the normal operation of the system, for example, data centers, machine rooms and the like, generally adopt two-way or three-way power supply modes including mains supply, battery supply and generator supply, the mains supply is used as a main power supply and is output to a load through a power supply conversion unit, a battery and a generator are standby power supply circuits, and after the mains supply is powered off, the system is automatically switched to the battery power supply mode or is switched to the generator power supply mode.
However, in industrial places, because of large energy consumption, the occupied area of the installed battery and the installed generator is large, the cost is high, the circuit structure is complex, and the power supply device is not suitable for other power supply places.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a reserve supply circuit aims at solving traditional redundant supply circuit and is with high costs, the complicated problem of circuit structure.
A first aspect of an embodiment of the present invention provides a standby power supply circuit, which includes a power failure detection circuit, an activation circuit, a standby controller, a standby battery management circuit, a first battery pack, and a power conversion circuit;
the power failure detection circuit is respectively and electrically connected with an alternating current input end of a main power supply circuit and the controller, the activation circuit is respectively and electrically connected with a direct current output end of the main power supply circuit, a power supply end of a load, the controller, the power supply conversion circuit and the standby battery management circuit, the standby battery management circuit is also respectively and electrically connected with the first battery pack, the controller and the power supply conversion circuit, the power supply conversion circuit is also respectively and electrically connected with the controller and the power supply end of the first battery pack, and the controller is also connected with a direct current output end of the main power supply circuit;
the power failure detection circuit is used for detecting the on-off state of an alternating current power supply input by the main power supply circuit and outputting a power failure detection signal to the controller when the alternating current power supply is in a power failure state;
the activation circuit is used for outputting an activation signal to the controller and the standby battery management circuit when the alternating current power supply is powered off so as to sequentially activate the controller and the standby battery management circuit;
the controller is configured to:
receiving the power-off detection signal after activation and acquiring a first direct current signal of a direct current output end of the main power supply circuit;
when the first direct current signal is not acquired, the standby battery management circuit and the power supply conversion circuit are controlled to work so as to control the first battery pack to discharge and control the power supply conversion circuit to output a direct current power supply with the size corresponding to the direct current output end of the main power supply circuit and control the power supply conversion circuit to output a working power supply to the controller and the standby battery management circuit;
and when the first direct current signal is acquired, sending out a false alarm signal and controlling the standby battery management circuit and the power supply conversion circuit to stop working.
In one embodiment, the activation circuit includes a first power module, an LDO regulator module, and a power conversion unit;
the power input end of the LDO voltage stabilizing module and the power input end of the power conversion unit are respectively connected with the power supply end of the first power module, the power output end of the LDO voltage stabilizing module is connected with the first power end of the controller, the signal end of the LDO voltage stabilizing module is connected with the direct current output end of the main power supply circuit, the power output end of the power conversion unit is respectively connected with the second power end of the controller and the first power end of the standby battery management circuit, and the controlled end of the power conversion unit is connected with the signal end of the controller;
the LDO voltage stabilizing module is used for performing voltage conversion on the direct-current power supply output by the first power supply module when the alternating-current power supply is powered off, delaying a first preset time to output a first voltage signal to the controller so as to activate the controller, and delaying a second preset time to turn off the output after the controller is activated;
the controller is configured to:
when the first direct current signal is not acquired after activation, the power supply conversion unit is controlled to work, so that the power supply conversion unit outputs a second voltage signal to activate the standby battery management circuit and output a working power supply to the controller;
after the standby battery management circuit is activated, controlling the standby battery management circuit and the power conversion circuit to work and controlling the power conversion unit to be turned off so as to control the first battery pack to discharge and control the power conversion circuit to output a direct-current power supply with a corresponding size to the direct-current output end of the main power supply circuit and control the power conversion circuit to output a working power supply to the controller and the standby battery management circuit;
and when the first direct current signal is acquired, sending out a false alarm signal and controlling the standby battery management circuit and the power supply conversion circuit to stop working.
In one embodiment, the LDO regulator module includes a delay switch unit and a first buck unit;
the controlled end of the delay switch unit is connected with the direct-current output end of the main power supply circuit, the input end of the delay switch unit is connected with the power supply end of the first power supply module, the output end of the delay switch unit is connected with the input end of the first voltage reduction unit, and the output end of the first voltage reduction unit is connected with the first power supply end of the controller;
the time delay switch unit is used for switching off when the alternating current power supply is not powered off; and
when the alternating current power supply is powered off, the conduction is delayed for a first preset time, and the direct current power supply output by the first power supply module is output to the first voltage reduction unit, so that the direct current power supply output by the first power supply module is converted by the first voltage reduction unit, the first voltage signal is output to the controller, and the controller is turned off after a second preset time.
In one embodiment, the power conversion unit includes a BOOST circuit, and a power input terminal, a power output terminal, and a controlled terminal of the BOOST circuit are the power input terminal, the power output terminal, and the controlled terminal of the power conversion unit, respectively.
In one embodiment, the first power module includes a second battery pack.
In one embodiment, the second power module is a power adapter.
In one embodiment, the activation circuit further includes a charging circuit for charging the first power module, a power input terminal of the charging circuit is connected to the dc output terminal of the main power supply circuit, and a power output terminal of the charging circuit is connected to the power supply terminal of the first power module.
In one embodiment, the power failure detection circuit comprises an AC/DC unit for rectifying and converting the alternating current power supply, a second voltage reduction unit for performing voltage reduction and conversion on a direct current signal output by the AC/DC unit, and an optical coupling feedback unit for performing optical coupling isolation and output on the direct current signal output by the second voltage reduction unit;
the power input end of the AC/DC unit is connected with the alternating current input end of the main power supply circuit, the power output end of the AC/DC unit is connected with the power input end of the second voltage reduction unit, the power output end of the second voltage reduction unit is connected with the signal input end of the optical coupling feedback unit, and the signal output end of the optical coupling feedback unit is connected with the signal end of the controller.
In one embodiment, the controller, the backup battery management circuit, and the first battery pack are disposed within a cabinet.
A second aspect of the embodiments of the present invention provides a power supply device, which includes a main power supply circuit and a backup power supply circuit as described above.
Compared with the prior art, the embodiment of the utility model beneficial effect who exists is: the standby power supply circuit is connected with the input end and the output end of the main power supply circuit to form a redundant power supply circuit, when the alternating current power supply is powered off, the power failure detection circuit in the standby power supply circuit sends a power failure detection signal, the activation circuit is started and sends the activation signal to the controller and the standby battery management circuit, the controller and the power failure detection circuit are successively activated, the main power supply circuit is determined to be really powered off when the first direct current signal of the output of the main power supply circuit is not acquired, the controller controls the first battery pack and the power conversion circuit to work, controls the power conversion circuit to output a direct current power supply with the size corresponding to the direct current output end of the main power supply circuit, supplies power to the controller and the standby battery management circuit, and switches to the standby power supply circuit to realize redundant power supply, and the standby power supply circuit has a simple structure, Low cost and is suitable for various occasions.
Drawings
Fig. 1 is a schematic diagram of a first structure of a standby power supply circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a second structure of the standby power supply circuit according to the embodiment of the present invention;
fig. 3 is a schematic structural diagram of an LDO regulator module according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a third structure of the standby power supply circuit according to the embodiment of the present invention;
fig. 5 is a schematic structural diagram of a power-off detection circuit according to an embodiment of the present invention.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
A first aspect of the embodiments of the present invention provides a standby power supply circuit 100.
As shown in fig. 1, in the present embodiment, the standby power supply circuit 100 includes a power failure detection circuit 10, an activation circuit 20, a controller 30, a standby battery management circuit 40, a first battery pack 50, and a power conversion circuit 60;
the power failure detection circuit 10 is electrically connected to the ac input terminal of the main power supply circuit 200 and the controller 30, the activation circuit 20 is electrically connected to the dc output terminal of the main power supply circuit 200, the power source terminal of the load 300, the controller 30, the power conversion circuit 60 and the backup battery management circuit 40, the backup battery management circuit 40 is also electrically connected to the first battery pack 50, the controller 30 and the power conversion circuit 60, the power conversion circuit 60 is also electrically connected to the power source terminals of the controller 30 and the first battery pack 50, and the controller 30 is also connected to the dc output terminal of the main power supply circuit 200;
a power-off detection circuit 10 for detecting the on-off state of the ac power input by the main power supply circuit 200 and outputting a power-off detection signal to the controller 30 when the ac power is off;
an activation circuit 20 for outputting an activation signal to the controller 30 and the battery backup management circuit 40 when the ac power source is powered off, to sequentially activate the controller 30 and the battery backup management circuit 40;
a controller 30 for:
receiving a power-off detection signal after activation and acquiring a first direct current signal of a direct current output end of the main power supply circuit 200;
when the first direct current signal is not acquired, controlling the standby battery management circuit 40 and the power conversion circuit 60 to work so as to control the first battery pack 50 to discharge, control the power conversion circuit 60 to output a direct current power supply with a size corresponding to the direct current output end of the main power supply circuit 200, and control the power conversion circuit 60 to output a working power supply to the controller 30 and the standby battery management circuit 40;
when the first direct current signal is acquired, a false alarm signal is sent out and the standby battery management circuit 40 and the power supply conversion circuit 60 are controlled to stop working.
In this embodiment, the standby power supply circuit 100 is connected in parallel with the main power supply circuit 200, and monitors the operating state of the main power supply circuit 200, the main power supply circuit 200 is configured to perform power conversion on an ac power supply, and output a dc power supply to the load 300 after processing such as rectification, voltage reduction, and filtering, so as to drive the load 300 to operate, the main power supply circuit 200 may include a rectification circuit, a voltage reduction circuit, a filtering circuit, and the like, and the specific structure is designed according to the dc voltage class of the load 300.
When the standby power supply circuit 100 is in a sleep state or an off state, the main power supply circuit 200 provides a dc power to drive the load 300 to operate, when the input terminal of the main power supply circuit 200 is momentarily powered off, that is, the ac power is momentarily powered off, the main power supply circuit 200 stops outputting, the load 300 stops operating, at this time, the power failure detection circuit 10 and the activation circuit 20 operate, the activation circuit 20 outputs an activation signal to the controller 30 and the standby battery management circuit 40, thereby activating the controller 30 and the standby battery management circuit 40, at this time, the controller 30 receives the power failure detection signal output by the power failure detection circuit 10, in order to avoid false triggering, the controller 30 also simultaneously detects the first dc signal at the dc output terminal of the main power supply circuit 200, when the first dc signal is detected, it is indicated that an interference signal exists at the ac input terminal of the main power supply circuit 200, at this time, the controller 30 sends a false alarm signal and controls the standby battery management circuit 40 and the power conversion circuit The standby power supply circuit 100 supplies power to the standby battery management circuit 40 and the controller 30, wherein the standby power supply circuit 100 supplies power through the first battery pack, the battery pack is small in size and low in cost compared with a generator, and the standby power supply circuit 100 is simple in circuit structure and applicable to various occasions.
In this embodiment, the power-off detection circuit 10 may adopt a voltage transformer, an optical coupler sampling circuit or other detection circuits, and the specific structure is not limited.
The battery backup management circuit 40 may adopt a BMS module or a PMS module, a specific structure may be selected according to a requirement, and meanwhile, the battery backup management circuit 40 may correspondingly select a corresponding combination and number of the battery cells in the first battery pack 50 to discharge according to the type and the voltage level of the load 300.
The controller 30 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. The general purpose processor may be a microprocessor or the processor may be any conventional processor, etc. in one embodiment, in order to reduce the design, when the controller 30 is disposed in the main power supply circuit 200, the main power supply circuit 200 and the standby power supply circuit 100 may share the same controller 30, when the main power supply circuit 200 is normally operated, the main power supply circuit 200 supplies power to the controller 30, when the ac power supply is cut off in the main power supply circuit 200, the controller 30 stops operating, at this time, the activation circuit 20 of the standby power supply circuit 100 starts operating, and the activation of the controller 30 and the activation of the standby battery management circuit 40 are sequentially activated, so as to switch to the standby power supply circuit to drive the load 300 to operate.
Compared with the prior art, the embodiment of the utility model beneficial effect who exists is: the standby power supply circuit 100 is connected with the input end and the output end of the main power supply circuit 200 to form a redundant power supply circuit, when an alternating current power supply is powered off, the power failure detection circuit 10 in the standby power supply circuit 100 sends a power failure detection signal, the activation circuit 20 starts and sends an activation signal to the controller 30 and the standby battery management circuit 40, the controller 30 and the power failure detection circuit 10 are sequentially activated, and when a first direct current signal output by the main power supply circuit 200 is not acquired, the main power supply circuit 200 is determined to be powered off really, the controller 30 controls the first battery pack 50 and the power supply conversion circuit 60 to work, controls the power supply conversion circuit 60 to output a direct current power supply with the size corresponding to the direct current output end of the main power supply circuit 200 and supply power to the controller 30 and the standby battery management circuit 40, so as to switch to the standby power supply circuit 100, realize redundant power supply, the utility model discloses standby power supply circuit 100 simple structure, with low costs, applicable in multiple occasion.
As shown in fig. 2, in one embodiment, the activation circuit 20 includes a first power module 22, an LDO regulation module 21, and a power conversion unit 23;
a power input end of the LDO voltage stabilization module 21 and a power input end of the power conversion unit 23 are respectively connected with a power end of the first power module 22, a power output end of the LDO voltage stabilization module 21 is connected with a first power end of the controller 30, a signal end of the LDO voltage stabilization module 21 is connected with a direct current output end of the main power supply circuit 200, a power output end of the power conversion unit 23 is respectively connected with a second power end of the controller 30 and a first power end of the standby battery management circuit 40, and a controlled end of the power conversion unit 23 is connected with a signal end of the controller 30;
the LDO voltage stabilization module 21 is configured to perform voltage conversion on the dc power supply output by the first power supply module 22 when the ac power supply is powered off, delay a first preset time period to output a first voltage signal to the controller 30 so as to activate the controller 30, and delay a second preset time period to turn off the output after the controller 30 is activated;
a controller 30 for:
when the first direct current signal is not acquired after the activation, the power conversion unit 23 is controlled to work, so that the power conversion unit 23 outputs a second voltage signal to activate the standby battery management circuit 40 and output a working power supply to the controller 30;
after the standby battery management circuit 40 is activated, controlling the standby battery management circuit 40 and the power conversion circuit 60 to work and controlling the power conversion unit 23 to be turned off, so as to control the first battery pack 50 to discharge and control the power conversion circuit 60 to output a direct-current power supply with a corresponding size to the direct-current output end of the main power supply circuit 200, and control the power conversion circuit 60 to output a working power supply to the controller 30 and the standby battery management circuit 40;
when the first direct current signal is acquired, a false alarm signal is sent out and the standby battery management circuit 40 and the power supply conversion circuit 60 are controlled to stop working.
In this embodiment, when the ac power is momentarily powered off, the power-off detection circuit 10 outputs a power-off detection signal, at this time, the controller 30 is in an inactive state, the LDO regulator module 21 outputs a first voltage signal to the controller 30 when detecting the ac power is momentarily powered off, so as to activate the controller 30, the controller 30 enters a standby power start mode, starts performing detection before standby power start to determine whether the ac power is powered off by false trigger, at this time, the controller 30 detects a first dc signal at the dc output terminal of the main power supply circuit 200, and when detecting the first dc signal, it indicates that the current ac power is powered off by false trigger, at this time, sends a false alarm signal and controls the standby battery management circuit 40 and the power conversion circuit 60 to stop working, the power conversion circuit 60 stops outputting the dc power, and when not detecting the first dc signal, it indicates that the current main power supply circuit 200 is powered off and stops working, the controller 30 controls the power conversion unit 23 to output a second voltage signal, the LDO regulator module 21 automatically turns off the output, the second voltage signal maintains the controller 30 to operate and activates the backup battery management circuit 40, the controller 30 controls the backup battery management circuit 40 to operate, so that a corresponding number of the single batteries in the first battery pack 50 output dc power to the power conversion circuit 60 and then output the load 300, when the first battery pack 50 is normally discharged and the power conversion circuit 60 is normally output, in order to reduce the power consumption of the first power module 22, the controller 30 controls the power conversion unit 23 to turn off, and switches to the power conversion circuit 60 to operate as the controller 30 and the backup battery management circuit 40.
In this embodiment, the LDO regulator module 21 may adopt a circuit combination of a timer, a switch circuit, a buck circuit, or other structural circuits, as shown in fig. 3, in one embodiment, the LDO regulator module 21 includes a delay switch unit 21A and a first buck unit 21B;
the controlled end of the delay switch unit 21A is connected to the dc end of the main power supply circuit 200, the input end of the delay switch unit 21A is connected to the power supply end of the first power module 22, the output end of the delay switch unit 21A is connected to the input end of the first voltage reducing unit 21B, and the output end of the first voltage reducing unit 21B is connected to the first power supply end of the controller 30;
the time delay switch unit 21A is used for switching off when the alternating current power supply is not powered off; and
the first preset time is delayed for turning on when the ac power supply is powered off, and the dc power supply output by the first power supply module 22 is output to the first voltage reduction unit 21B, so that the first voltage reduction unit 21B converts the dc power supply output by the first power supply module 22, outputs a first voltage signal to the controller 30, and turns off after the second preset time.
In this embodiment, when the ac power supply is normal, the delay switch unit 21A is turned off, the LDO regulator module 21 stops working, and when the ac power supply is powered off, the delay switch unit 21A is turned on in a delayed manner, and outputs the dc power output by the first power supply module 22 to the first voltage reduction unit 21B, and the first voltage reduction unit 21B performs voltage reduction conversion, and outputs a first voltage signal to activate the controller 30, and is automatically turned off after a second preset time is delayed after the controller 30 is activated.
The delay switch unit 21A may adopt a timer, a timer or a corresponding combination circuit of a capacitor component and a switch component, the delay time of the delay switch unit 21A is correspondingly set according to the activation interval time of the controller 30 and the backup battery management circuit 40, and the specific structure is selected according to the requirement.
The first voltage reduction unit 21B may employ a resistance voltage reduction circuit, a BUCK voltage reduction circuit, or a regulator.
The power conversion unit 23 may adopt a BOOST chip or an amplifying circuit, and in an embodiment, the power conversion unit 23 includes a BOOST circuit, and a power input terminal, a power output terminal, and a controlled terminal of the BOOST circuit are a power input terminal, a power output terminal, and a controlled terminal of the power conversion unit 23, respectively.
The first power module 22 and the power conversion circuit 60 may adopt a power adapter, a battery, etc. structure, specifically selected according to requirements, in an embodiment, the first power module 22 includes a second battery pack, the power conversion circuit 60 is a power adapter, a power input terminal of the power adapter is connected to a power terminal of the first battery pack 50, and a power output terminal of the power adapter is respectively connected to a third power terminal of the controller 30 and a second power terminal of the standby battery management circuit 40, in this embodiment, the second battery pack is only used for activating the controller 30 and the standby battery management circuit 40 due to limited electric quantity, therefore, after the controller 30 and the standby battery management circuit 40 are activated, the controller 30 controls the standby battery management circuit 40 and the first battery pack 50 to work, at this time, the power adapter is powered on, and the controller 30 controls the power conversion unit 23 to stop working, controller 30 and battery backup management circuit 40 are powered by a power adapter.
As shown in fig. 4, in one embodiment, the activation circuit 20 further includes a charging circuit 24 for charging the first power module 22, a power input terminal of the charging circuit 25 is connected to the dc output terminal of the main power supply circuit 200, and a power output terminal of the charging circuit 25 is connected to the power supply terminal of the first power module 22.
In this embodiment, the charging circuit 25 charges the first power module 22, i.e., the second battery pack, through the DC power output by the main power supply circuit when the ac power is normal, so as to avoid the shortage of the power of the first power module 22 during repeated use, the charging circuit 25 may be a charging conversion circuit, such as a DC/DC conversion circuit, a voltage stabilizing circuit, etc., and the specific type and structure of the charging circuit 25 may be selected according to the voltage class and type of the second battery pack.
As shown in fig. 5, in an embodiment, the power outage detection circuit 10 includes an AC/DC unit 11 for performing rectification conversion on an AC power supply, a second voltage reduction unit 12 for performing voltage reduction conversion on a DC signal output by the AC/DC unit 11, and an optical coupler feedback unit 13 for performing optical coupler isolation output on the DC signal output by the second voltage reduction unit 12, a power input end of the AC/DC unit 11 is connected with an AC input end of the main power supply circuit 200, a power output end of the AC/DC unit 11 is connected with a power input end of the second voltage reduction unit 12, a power output end of the second voltage reduction unit 12 is connected with a signal input end of the optical coupler feedback unit 13, and a signal output end of the optical coupler feedback unit 13 is connected with a signal end of the controller 30.
In this embodiment, the on-off state of the AC power supply is fed back to the controller 30 through the AC/DC unit 11, and the optical coupler feedback unit 13, when the AC power supply is normal, the optical coupler feedback unit 13 does not output a feedback signal, and when the AC power supply is powered off, the optical coupler feedback unit 13 outputs a power-off detection signal, such as a high-low level signal.
The AC/DC unit 11 may be a rectifying circuit or an AC/DC module, and the second voltage-reducing unit 12 may be a resistive voltage-reducing circuit or a BUCK circuit, which is selected according to the requirement.
In order to improve safety and bus integration, in one embodiment, the controller 30, the backup battery management circuit 40, and the first battery pack 50 are disposed in a cabinet, and the cabinet may be connected to a dc output terminal of the main power supply circuit 200 through a dc bus, so as to detect the first dc signal and output the dc power.
The utility model discloses the second aspect of the embodiment provides a power supply unit, and this power supply unit includes main supply circuit 200 and reserve supply circuit 100, and this reserve supply circuit 100's concrete structure refers to above-mentioned embodiment, because this power supply unit has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here.
In this embodiment, the main power supply circuit 200 and the standby power supply circuit 100 are redundantly designed to supply power to the load 300, after the main power supply circuit 200 is powered off, the standby power supply circuit 100 is switched to supply power, and when the main power supply circuit 200 is normal, the standby power supply circuit 100 stops working, so that redundant power supply is realized, and power supply reliability is improved.
The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A standby power supply circuit is characterized by comprising a power failure detection circuit, an activation circuit, a standby controller, a standby battery management circuit, a first battery pack and a power supply conversion circuit;
the power failure detection circuit is respectively and electrically connected with an alternating current input end of a main power supply circuit and the controller, the activation circuit is respectively and electrically connected with a direct current output end of the main power supply circuit, a power supply end of a load, the controller, the power supply conversion circuit and the standby battery management circuit, the standby battery management circuit is also respectively and electrically connected with the first battery pack, the controller and the power supply conversion circuit, the power supply conversion circuit is also respectively and electrically connected with the controller and the power supply end of the first battery pack, and the controller is also connected with a direct current output end of the main power supply circuit;
the power failure detection circuit is used for detecting the on-off state of an alternating current power supply input by the main power supply circuit and outputting a power failure detection signal to the controller when the alternating current power supply is in a power failure state;
the activation circuit is used for outputting an activation signal to the controller and the standby battery management circuit when the alternating current power supply is powered off so as to sequentially activate the controller and the standby battery management circuit;
the controller is configured to:
receiving the power-off detection signal after activation and acquiring a first direct current signal of a direct current output end of the main power supply circuit;
when the first direct current signal is not acquired, the standby battery management circuit and the power supply conversion circuit are controlled to work so as to control the first battery pack to discharge and control the power supply conversion circuit to output a direct current power supply with the size corresponding to the direct current output end of the main power supply circuit and control the power supply conversion circuit to output a working power supply to the controller and the standby battery management circuit;
and when the first direct current signal is acquired, sending out a false alarm signal and controlling the standby battery management circuit and the power supply conversion circuit to stop working.
2. The standby power supply circuit of claim 1 wherein said activation circuit comprises a first power supply module, an LDO regulator module, and a power conversion unit;
the power input end of the LDO voltage stabilizing module and the power input end of the power conversion unit are respectively connected with the power supply end of the first power module, the power output end of the LDO voltage stabilizing module is connected with the first power end of the controller, the signal end of the LDO voltage stabilizing module is connected with the direct current output end of the main power supply circuit, the power output end of the power conversion unit is respectively connected with the second power end of the controller and the first power end of the standby battery management circuit, and the controlled end of the power conversion unit is connected with the signal end of the controller;
the LDO voltage stabilizing module is used for performing voltage conversion on the direct-current power supply output by the first power supply module when the alternating-current power supply is powered off, delaying a first preset time to output a first voltage signal to the controller so as to activate the controller, and delaying a second preset time to turn off the output after the controller is activated;
the controller is configured to:
when the first direct current signal is not acquired after activation, the power supply conversion unit is controlled to work, so that the power supply conversion unit outputs a second voltage signal to activate the standby battery management circuit and output a working power supply to the controller;
after the standby battery management circuit is activated, controlling the standby battery management circuit and the power conversion circuit to work and controlling the power conversion unit to be turned off so as to control the first battery pack to discharge and control the power conversion circuit to output a direct-current power supply with a corresponding size to the direct-current output end of the main power supply circuit and control the power conversion circuit to output a working power supply to the controller and the standby battery management circuit;
and when the first direct current signal is acquired, sending out a false alarm signal and controlling the standby battery management circuit and the power supply conversion circuit to stop working.
3. The standby power supply circuit of claim 2, wherein the LDO regulator module comprises a delay switch unit and a first buck unit;
the controlled end of the delay switch unit is connected with the direct-current output end of the main power supply circuit, the input end of the delay switch unit is connected with the power supply end of the first power supply module, the output end of the delay switch unit is connected with the input end of the first voltage reduction unit, and the output end of the first voltage reduction unit is connected with the first power supply end of the controller;
the time delay switch unit is used for switching off when the alternating current power supply is not powered off; and
when the alternating current power supply is powered off, the conduction is delayed for a first preset time, and the direct current power supply output by the first power supply module is output to the first voltage reduction unit, so that the direct current power supply output by the first power supply module is converted by the first voltage reduction unit, the first voltage signal is output to the controller, and the controller is turned off after a second preset time.
4. The backup power supply circuit of claim 2, wherein the power conversion unit comprises a BOOST voltage BOOST circuit, and the power input terminal, the power output terminal, and the controlled terminal of the BOOST voltage BOOST circuit are the power input terminal, the power output terminal, and the controlled terminal of the power conversion unit, respectively.
5. The backup power supply circuit of claim 2, wherein said first power module comprises a second battery pack.
6. The backup power supply circuit according to claim 1, wherein said power conversion circuit is a power adapter, a power input terminal of said power adapter being connected to a power terminal of said first battery pack, a power output terminal of said power adapter being connected to a third power terminal of said controller and a second power terminal of said backup battery management circuit, respectively.
7. The backup power supply circuit according to claim 2, wherein said activation circuit further comprises a charging circuit for charging said first power module, a power input of said charging circuit being connected to a dc output of said primary power supply circuit, a power output of said charging circuit being connected to a power supply terminal of said first power module.
8. The backup power supply circuit according to claim 1, wherein the power failure detection circuit comprises an AC/DC unit for performing rectification conversion on the AC power, a second voltage reduction unit for performing voltage reduction conversion on a DC signal output by the AC/DC unit, and an optical coupling feedback unit for performing optical coupling isolation output on the DC signal output by the second voltage reduction unit;
the power input end of the AC/DC unit is connected with the alternating current input end of the main power supply circuit, the power output end of the AC/DC unit is connected with the power input end of the second voltage reduction unit, the power output end of the second voltage reduction unit is connected with the signal input end of the optical coupling feedback unit, and the signal output end of the optical coupling feedback unit is connected with the signal end of the controller.
9. The backup power supply circuit of claim 1, wherein said controller, said backup battery management circuit, and said first battery pack are disposed within a cabinet.
10. A power supply arrangement comprising a main power supply circuit and a backup power supply circuit as claimed in any one of claims 1 to 9.
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| CN202020424248.1U CN211790932U (en) | 2020-03-27 | 2020-03-27 | Standby power supply circuit and power supply device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111342545A (en) * | 2020-03-27 | 2020-06-26 | 深圳易马达科技有限公司 | Standby power supply circuit and power supply device |
| CN112653231A (en) * | 2020-12-17 | 2021-04-13 | 南方电网电力科技股份有限公司 | Backup power supply device and method for power terminal |
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2020
- 2020-03-27 CN CN202020424248.1U patent/CN211790932U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111342545A (en) * | 2020-03-27 | 2020-06-26 | 深圳易马达科技有限公司 | Standby power supply circuit and power supply device |
| WO2021189937A1 (en) * | 2020-03-27 | 2021-09-30 | 深圳易马达科技有限公司 | Standby power supply circuit and power supply device |
| CN112653231A (en) * | 2020-12-17 | 2021-04-13 | 南方电网电力科技股份有限公司 | Backup power supply device and method for power terminal |
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