CN205846852U - A kind of UPS power supply device - Google Patents

Abstract

The utility model relates to a UPS power supply device. The voltage input end of the first UPS power supply is connected to an external power supply; the voltage output end of the first UPS power supply is connected to a load circuit; the voltage output end of the first UPS power supply is also connected to the voltage of a power failure detection circuit Input terminal; when the signal output terminal of the power-down detection circuit is powered off by the first UPS power supply, it outputs a power-down level signal to the MCU module; the voltage input terminal of the second UPS power supply is used to connect to an external power supply, and the voltage output terminal is used to connect The voltage input terminal of the controlled switch circuit; the voltage output terminal of the controlled switch circuit is used to connect the load circuit; after the MCU module receives the power-down level signal, it drives the controlled switch circuit to close; the MCU module and the first UPS The power supply and the battery pack inside the second UPS power supply are connected, and the voltage value of the battery pack is read in real time. The UPS power supply device can improve the stability of power supply and ensure the normal operation of electric equipment.

Description

A kind of UPS power supply device

technical field

The utility model relates to the technical field of electric power equipment, in particular to a UPS power supply device.

Background technique

UPS (Uninterruptible Power System, uninterruptible power supply) is a constant voltage and constant frequency uninterruptible power supply with an energy storage device and an inverter as the main component. When the mains input is normal, the UPS will stabilize the mains and supply it to the load. At this time, the UPS is an AC mains voltage stabilizer, and it also charges the battery inside the machine; when the mains is interrupted (accident blackout) At this time, the UPS immediately uses the electric energy of the internal battery to continue to supply 220V AC to the load through the method of inverter conversion. The UPS power supply realizes uninterrupted power supply to the power supply recipient due to its own structure.

But in fact, during the use of UPS power supply, since most power supply systems only use one UPS power supply when supplying power to electrical equipment, at the same time, with the aging of the internal battery pack of UPS power supply, once the UPS power supply If there is a problem with the power supply itself, or the failure to supply power to the electrical equipment due to the aging and undervoltage of the battery, it will still affect the normal operation of the electrical equipment, so the stability of the current UPS power supply is poor.

Utility model content

In view of this, the purpose of the embodiment of the utility model is to provide a UPS power supply device, which can improve the stability of power supply and ensure the normal operation of electric equipment.

The embodiment of the utility model provides a UPS power supply device, including: a first UPS power supply, a second UPS power supply, a power-down detection circuit, a controlled switch circuit and an MCU module;

The voltage input terminal of the first UPS power supply is used to connect to an external power supply;

The voltage output end of the first UPS power supply is used to connect the load circuit; and the voltage output end of the first UPS power supply is also connected to the voltage input end of the power-down detection circuit; the signal output end of the power-down detection circuit is used When the first UPS power supply is powered off, output a power-down level signal to the MCU module;

The voltage input terminal of the second UPS power supply is used to connect to an external power supply, and the voltage output terminal is used to connect to the voltage input terminal of the controlled switch circuit; the voltage output terminal of the controlled switch circuit is used to connect to the load circuit;

The MCU module is connected to the signal output end of the power-down detection circuit;

The MCU module is configured to output an enable signal to the controlled switch circuit after receiving the power-down level signal, and drive the controlled switch circuit to close;

The MCU module is also connected to the battery pack inside the first UPS power supply and the second UPS power supply through the A/D conversion module, and reads the voltage value of the battery pack in real time.

In various embodiments of the present utility model, preferably, the first UPS power supply includes:

a first rectifier, a first inverter, and a first battery pack;

There are three voltage input terminals of the first inverter, two of which are used as voltage input terminals of the first UPS power supply, and the other one is connected to the voltage output terminal of the first battery pack;

There are two voltage output terminals of the first inverter, one of which is connected to the load circuit, and the other is connected to the voltage input terminal of the first battery pack through the first rectifier;

The voltage output terminal of the first battery pack is connected to the MCU module through the first A/D conversion module.

In various embodiments of the present utility model, preferably, the second UPS power supply includes:

a second rectifier, a second inverter, and a second battery pack;

There are three voltage input terminals of the second inverter, two of which are used as voltage input terminals of the second UPS power supply, and the other one is connected to the voltage output terminal of the second battery pack;

There are two voltage output terminals of the second inverter, one of which is connected to the controlled switch circuit, and the other is connected to the voltage input terminal of the second battery pack through the second rectifier;

The voltage output terminal of the second battery pack is connected to the MCU module through the second A/D conversion module.

In each embodiment of the present utility model, preferably, the power-down detection circuit includes: a rectification circuit, a detection circuit and a comparison circuit connected in sequence;

Wherein, the voltage input end of the rectification circuit is used as the voltage input end of the power-down detection circuit;

The voltage output terminal of the comparison circuit is used as the signal output terminal of the power-down detection circuit.

In various embodiments of the present utility model, preferably, the rectifier circuit is a bridge rectifier circuit, including: diode D1, diode D2, diode D3 and diode D4;

Wherein, the anode of the diode D1 is connected to the cathode of the diode D3; the cathode of the diode D1 is connected to the cathode of the diode D2; the anode of the diode D3 and the anode of the diode D4 are grounded; the cathode of the diode D4 is connected to the cathode of the diode D2. The anode connection of the diode D2;

The anode of the diode D1 and the anode of the diode D2 are connected to the two voltage input ends of the rectification circuit; and the cathode of the diode D1 is connected to the voltage output end of the rectification circuit.

In various embodiments of the present utility model, preferably, the detection circuit includes: a voltage dividing resistor R1, a voltage dividing resistor R2, a switching transistor Q1, an energy storage capacitor C1, and a charging resistor R3;

Wherein, the voltage dividing resistor R1 and the voltage dividing resistor R2 are connected in series, and one end of the voltage dividing resistor R1 away from the voltage dividing resistor R2 is connected to the voltage output terminal of the rectifier circuit;

The base of the switching transistor Q1 is connected between the voltage dividing resistor R1 and the voltage dividing resistor R2, and the collector is connected between the energy storage capacitor C1 and the charging resistor R3;

One end of the charging resistor R3 away from the collector of the switching transistor Q1 is also connected to a charging power supply V;

The end of the voltage dividing resistor R2 away from the voltage dividing resistor R1, the emitter of the switching transistor Q1 and the end of the energy storage capacitor C1 away from the charging resistor R3 are all grounded.

In each embodiment of the present utility model, preferably, the comparison circuit includes: a voltage dividing resistor R4 and a voltage dividing resistor R5 connected in series, and also includes a comparator U1;

The end of the voltage dividing resistor R4 far away from the voltage dividing resistor R5 is connected to the charging resistor R3 far away from the collector of the switching transistor Q1; the end of the voltage dividing resistor R5 far away from the voltage dividing resistor R4 is grounded;

The comparator U1 includes two signal input terminals, wherein the low potential terminal is connected to the collector of the switching transistor Q1; the high potential terminal is connected between the voltage dividing resistor R4 and the voltage dividing resistor R5;

The comparator U1 also includes: a ground terminal, a power input terminal and a signal output terminal;

The signal output terminal of the comparator U1 is used as the signal port output terminal of the power-down detection circuit.

In each embodiment of the present utility model, preferably, it also includes: also includes: an alarm device;

The MCU module is electrically connected with the alarm device.

In each embodiment of the present utility model, preferably, it also includes: a display;

The display is connected with the MCU module.

In each embodiment of the present utility model, preferably, it also includes: a wireless communication module;

The wireless communication module is connected to the MCU module;

The MCU module communicates with the host computer through the wireless communication module.

In the UPS power supply device provided by the embodiment of the utility model, the voltage input terminal of the first UPS power supply is connected to an external power supply, and the external power supply inputs current to the first UPS power supply, and the first UPS converts the current input by the external power supply into the load circuit. The required current is output, and at the same time, the current is also input from the voltage input terminal of the power-down detection circuit. Once the first UPS power supply has a problem and is powered off, the power-off detection circuit outputs a power-down level signal to the MCU module, and the MCU module drives the controlled switch circuit to close after receiving the power-down level signal. And the voltage input terminal of the controlled switch circuit is connected to the voltage output terminal of the second UPS power supply, therefore, when the controlled switch circuit is closed, the second UPS power supply is turned on, and when the first UPS power supply is powered off, the Continuous power supply to electrical equipment. At the same time, the MCU module is also connected to the battery pack inside the first UPS power supply and the second UPS power supply through the A/D conversion module, and reads the voltage value of the battery pack in real time. , the MCU module can immediately know the voltage value of the battery pack it reads, and realizes the monitoring of the internal battery pack of the UPS power supply. Compared with the existing UPS power supply, the UPS power supply device provides more stable power supply and ensures the normal operation of electric equipment.

In order to make the above-mentioned purpose, features and advantages of the present invention more comprehensible, preferred embodiments are specifically cited below, together with the accompanying drawings, and are described in detail as follows.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following drawings will be briefly introduced in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained according to these drawings without creative work.

Fig. 1 shows the structural representation of a kind of UPS circuit that the utility model embodiment provides;

Fig. 2 shows the structural representation of the first UPS power supply in the UPS circuit provided by the embodiment of the present invention;

Fig. 3 shows the structure diagram of the second UPS power supply in the UPS circuit provided by the embodiment of the present invention;

Fig. 4 shows in the UPS circuit provided by the embodiment of the present invention, the schematic structural diagram of the power-down detection circuit;

Fig. 5 shows the structural representation of another kind of UPS circuit that the utility model embodiment provides;

Description of icon marks:

A first UPS power supply 10, a first rectifier 101, a first inverter 102, a first battery pack 103 and a first A/D conversion module 104;

A second UPS power supply 20, a second rectifier 201, a second inverter 202 and a second battery pack 203;

Power-down detection circuit 30, rectification circuit 301, detection circuit 302 and comparison circuit 303;

Controlled switch circuit 40 ; MCU module 50 ; display 60 ; wireless communication module 70 ; alarm device 80 .

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiment is only a part of the embodiments of the present utility model, rather than all the embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present utility model.

When the current UPS power supply is in use, if it itself fails, it will still affect the normal operation of the electrical equipment, so the stability is poor. Based on this, a UPS power supply device provided by this application can improve the stability of power supply , to ensure the normal operation of electrical equipment.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, use a specific The azimuth structure and operation, therefore can not be construed as the limitation of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In addition, in the description of the present utility model, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, Or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

Referring to Fig. 1, an embodiment of the present invention provides a UPS power supply device, including: a first UPS power supply 10, a second UPS power supply 20, a power failure detection circuit 30, a controlled switch circuit 40 and an MCU module;

The voltage input port of the first UPS power supply 10 is used to connect to an external power supply, and the voltage output terminal is used to connect to the load circuit; and the voltage output terminal of the first UPS power supply is also connected to the voltage input of the power failure detection circuit 30 terminal; the signal output terminal of the power-down detection circuit 30 is used to output a power-down level signal to the MCU module when the first UPS power supply 10 is powered down;

The voltage input end of the second UPS power supply 20 is used to connect an external power supply, the voltage output end is used to connect the voltage input end of the controlled switch circuit 40; the voltage output end of the controlled switch circuit 40 is used to connect the load circuit;

The MCU module is connected to the signal output end of the power-down detection circuit;

The MCU module is configured to output an enable signal to the controlled switch circuit after receiving the power-down level signal, and drive the controlled switch circuit to close;

The MCU module is also connected to the battery pack inside the first UPS power supply and the second UPS power supply through the A/D conversion module, and reads the voltage value of the battery pack in real time.

MCU module (Microcontroller Unit, micro control unit), also known as single-chip microcomputer (SingleChip Microcomputer) or single-chip microcomputer, is a kind of integrated circuit chip, which performs different combination control for different applications. After receiving the power-down level signal sent by the power-down detection circuit, the MCU module sends an enable signal to the controlled switch circuit. The controlled switch circuit is closed after receiving the enabling signal, and the second UPS is powered on.

During specific implementation, the voltage input terminal of the first UPS power supply is connected to the external power supply, the external power supply inputs current to the first UPS power supply, and the first UPS converts the current input by the external power supply into the current output required in the load circuit, At the same time, the current is also input from the voltage input terminal of the power-down detection circuit. Once the first UPS power supply 10 has a problem and powers down, the power-down detection circuit outputs a power-down level signal to the MCU module, and the MCU module drives the controlled switch circuit to close after receiving the power-down level signal. And the voltage input terminal of the controlled switch circuit is connected to the voltage output terminal of the second UPS power supply, therefore, when the controlled switch circuit is closed, the second UPS power supply is turned on, and when the first UPS power supply is powered off, the Continuous power supply to electrical equipment. At the same time, the MCU module is also connected to the battery pack inside the first UPS power supply and the second UPS power supply through the A/D conversion module, and reads the voltage value of the battery pack in real time. , the MCU module can immediately know the voltage value of the battery pack it reads, and realizes the monitoring of the internal battery pack of the UPS power supply. Compared with the existing UPS power supply, the UPS power supply device provides more stable power supply and ensures the normal operation of electric equipment.

Referring to Fig. 2, the embodiment of the present invention also provides a specific structure of the first UPS power supply, including:

a first rectifier 101, a first inverter 102 and a first battery pack 103;

There are three voltage input terminals of the first inverter 102, two of which are used as voltage input terminals of the first UPS power supply 10, and the other one is connected to the voltage output terminal of the first battery pack;

There are two voltage output terminals of the first inverter 102, one of which is used to connect the load circuit, and the other is connected to the voltage input terminal of the first battery pack 103 through the first rectifier 101;

The voltage output terminal of the first battery pack 103 is connected to the MCU module 50 through the first A/D conversion module 104 .

During specific implementation, the external power supply connected to the voltage input terminal of the first UPS power supply is generally an AC power supply. Therefore, among the three voltage input terminals of the first inverter 102, two of them are used as the voltage of the first UPS power supply. The input terminal is connected to an external AC power supply, and the other one is connected to the voltage output terminal of the first battery pack 103. When the external power supply is powered off, the first battery pack 103 outputs a DC current to the first inverter 102, and the DC current passes through The first inverter inverts the alternating current to supply the load circuit. The first inverter 102 also has two output terminals, one of which can output the AC current input by the external power supply to the load circuit, and the other output the AC current to the first rectifier 101; the first rectifier 101 converts the AC power into a DC power, And input direct current into the first battery pack 103 to charge the first battery pack 103 . At the same time, the voltage output terminal of the first battery pack 103 is also connected to the MCU module through the first A/D conversion module, and the MCU module reads the voltage of the first battery pack 103 in real time. Once the voltage of the first battery pack 103 is found If the undervoltage occurs, it means that the power of the first battery pack 103 is insufficient, and a backup power supply needs to be activated, or the batteries of the first battery pack 103 are aging and need to be replaced.

In specific use, when the external power supply is powered off, no matter the first UPS power supply 10 or the second UPS power supply 20, the external power supply is all powered off. The first battery pack 103 or the second battery pack 203 is required for power supply. Generally, the first battery pack 103 is used for power supply first. When the first battery pack is undervoltage (below a certain preset threshold), the MCU module It will drive the controlled switch circuit to close and turn on the second UPS power supply, thereby prolonging the power supply time of the UPS power supply device when the external power supply is powered off, and further improving the stability of the UPS power supply device.

At this time, it should be noted that in order to disconnect the first UPS power supply 10 from the circuit, another controlled power supply circuit can also be connected to the voltage output terminal of the first UPS power supply 10, and the controlled power supply circuit is also connected to the MCU. The module is connected, and the dog can be disconnected or closed under the drive of the MCU module.

Referring to Fig. 3, the embodiment of the present invention also provides a specific structure of a second UPS power supply, including:

a second rectifier 201, a second inverter 202 and a second battery pack 203;

There are three voltage input terminals of the second inverter 202, two of which are used as voltage input terminals of the second UPS power supply 20, and the other is connected to the voltage output terminal of the second battery pack 203;

There are two voltage output terminals of the second inverter 202, one of which is connected to the controlled switch circuit, and the other is connected to the voltage input terminal of the second battery pack 203 through the second rectifier 201;

The voltage output terminal of the second battery pack is connected to the MCU module through the second A/D conversion module.

Specifically, the working process of the second UPS power supply is similar to that of the first UPS power supply, and will not be repeated here.

Referring to Figure 4, the embodiment of the present invention also provides a specific structure of a power-down detection circuit, including:

A rectification circuit 301, a detection circuit 302 and a comparison circuit 303 connected in sequence;

Wherein, the voltage input end of the rectification circuit 301 is used as the voltage input end of the power-down detection circuit 30;

The voltage output terminal of the comparison circuit 303 is used as the signal output terminal of the power-down detection circuit 30 .

Wherein, since the current output by the first UPS power supply 10 is alternating current, the rectification of the alternating current is realized through the rectification circuit. The detection circuit 302 is used to detect the current, and the comparison circuit 303 realizes the output of the power-down level signal through a comparator.

During specific implementation, the rectifier circuit 301 includes: a diode D1, a diode D2, a diode D3 and a diode D4;

Wherein, the anode of the diode D1 is connected to the cathode of the diode D3; the cathode of the diode D1 is connected to the cathode of the diode D2; the anode of the diode D3 and the anode of the diode D4 are grounded; the cathode of the diode D4 is connected to the cathode of the diode D2. The anode connection of the diode D2;

The anode of the diode D1 and the anode of the diode D2 are connected to the two voltage input ends of the rectification circuit; and the cathode of the diode D1 is connected to the voltage output end of the rectification circuit.

Through the bridge rectifier circuit, the alternating current is rectified, and the direct current is output to the detection circuit 302 .

In addition, the detection circuit 302 includes: a voltage dividing resistor R1, a voltage dividing resistor R2, a switching transistor Q1, an energy storage capacitor C1, and a charging resistor R3;

Wherein, the voltage dividing resistor R1 and the voltage dividing resistor R2 are connected in series, and one end of the voltage dividing resistor R1 away from the voltage dividing resistor R2 is connected to the voltage output terminal of the rectifier circuit;

The base of the switching transistor Q1 is connected between the voltage dividing resistor R1 and the voltage dividing resistor R2, and the collector is connected between the energy storage capacitor C1 and the charging resistor R3;

One end of the charging resistor R3 away from the collector of the switching transistor Q1 is also connected to a charging power supply V;

The end of the voltage dividing resistor R2 away from the voltage dividing resistor R1, the emitter of the switching transistor Q1 and the end of the energy storage capacitor C1 away from the charging resistor R3 are all grounded.

The comparison circuit includes: a series voltage dividing resistor R4, a voltage dividing resistor R5, and a comparator U1;

One end of the voltage dividing resistor R4 far away from the voltage dividing resistor R5 is connected to the charging power supply V; the end of the voltage dividing resistor R5 far away from the voltage dividing resistor R4 is grounded;

The comparator U1 includes two signal input terminals, wherein the low potential end is connected to the collector of the switching transistor Q1; the high potential end is connected between the voltage dividing resistor R4 and the voltage dividing resistor R5;

The comparator U1 also includes: a ground terminal, a power input terminal and a signal output terminal;

The signal output terminal of the comparator U1 is used as the signal port output terminal of the power-down detection circuit.

During specific implementation, the energy storage capacitor C1 is used to charge, and the energy of the switching transistor Q1 is used to release the energy, thereby causing a level change at the signal input terminal of the comparison circuit 30. Since the switching transistor Q1 is controlled by the rectifying circuit 301 at the front end, When the energy of the energy storage capacitor C1 cannot be released for a long time, a high potential will be generated on the energy storage capacitor C1, and the two input terminals of the comparison circuit 303 are both high potentials, and the comparison circuit 303 will output a power-down level signal, otherwise The power-down level signal is not output.

In addition, it should be noted that the rectification circuit may also be a controllable rectification circuit, an uncontrollable rectification circuit or a precision rectification circuit of different topologies composed of other types of electronic components.

When the power-down detection circuit is used in a specific application, the AC voltage output by the first UPS power supply lock is input and rectified by the rectification circuit 301, and the rectified signal is divided to an appropriate level by R1 and R2, and the switching transistor Q1 is driven. The characteristics of the Q1 device and the required minimum alarm voltage value, the parameters of R1 and R2 are properly selected, so that when the AC input voltage is greater than the alarm voltage value, Q1 can be turned on when the voltage rises to a certain voltage in each half AC cycle, so that It discharges C1, and after the AC voltage drops to a certain voltage value after the peak value, Q1 is disconnected, and C1 is charged through R3 until the next time Q1 is turned on and discharged. When the AC voltage is normally input, Q1 is turned on once every half AC cycle to discharge C1, and the voltage of C1 will not reach the flipping action voltage of the subsequent circuit; when an abnormal situation occurs, the input signal is small or disappears for a long time (that is, when the first UPS power supply is powered off), during this period of time, Q1 will always be off, C1 will keep charging, and the voltage of C1 will continue to rise until it reaches and exceeds the flipping action voltage of the subsequent circuit, and the subsequent circuit will flip. A power-down level signal is output, and then the controlled switch circuit 40 is driven to be turned on through the power-down level signal, and the second UPS power supply is turned on, thereby supplying power to the electrical equipment.

When the first UPS power supply is restored to use, Q1 returns to the on-off state of the previous cycle, the subsequent stage circuit no longer outputs the power-down level signal, and the controlled switch circuit 40 is disconnected, resulting in the second UPS power supply Disconnect, so as to realize the power switching between two UPS power supplies.

Referring to Fig. 5, the UPS power supply provided by the embodiment of the utility model also includes: an alarm device 80;

The alarm device 80 is electrically connected to the MCU module 50;

When the MCU module reads the voltage value of the battery pack inside the first UPS power supply and the second UPS power supply, it will judge whether the voltage value is undervoltage. At this time, a comparator is provided inside the MCU module to read The obtained voltage is compared with the external input voltage. If the read voltage is higher than the external input voltage, the comparator outputs a high-level signal; when the MCU module receives the high-level signal, it will judge The voltage of the battery pack at this time is not in the undervoltage state; once the voltage is read from the external input voltage, the comparator outputs a low-level signal, and the MCU module judges this when receiving the low-level signal. When the voltage of the battery pack is in an undervoltage state, an alarm device is set to alarm.

The alarm device can be a light alarm device, a sound alarm device, or an information alarm device, which can send an alarm message or an alarm email to a preset mobile phone number or fuel tank.

The UMC module is also connected to a display 60 . The UMC module can monitor the power consumption of the first UPS power supply and the second UPS power supply, and display them on the display.

The UMC module is also connected with a wireless communication module 70; the MCU module communicates with the host computer through the wireless communication module, and sends the power supply conditions of the first UPS power supply and the second UPS power supply to the host computer.

The above is only a specific embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Anyone familiar with the technical field can easily think of changes or changes within the technical scope disclosed by the utility model Replacement should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (10)

1. a ups power device, it is characterised in that including: the first ups power, the second ups power, power-fail detection circuit, be subject to Control on-off circuit and MCU module；

The voltage input end of described first ups power is used for connecting external power supply；

The voltage output end of described first ups power is used for connecting load circuit；And the voltage output end of described first ups power It is also associated with the voltage input end of power-fail detection circuit；The signal output part of described power-fail detection circuit is for described first During ups power power down, export power down level signal to MCU module；

The voltage input end of described second ups power is used for connecting external power supply, and voltage output end is used for connecting described controlled open Close the voltage input end of circuit；The voltage output end of described controlled switching circuit is used for connecting load circuit；

Described MCU module is connected with the signal output part of described power-fail detection circuit；

Described MCU module, for after accepting described power down level signal, enables signal to the output of described controlled switching circuit, drives Dynamic described controlled switching circuit Guan Bi；

Described MCU module is also by A/D modular converter and the electricity within described first ups power and described second ups power Pond group connects, and reads the magnitude of voltage of described set of cells in real time.

Ups power device the most according to claim 1, it is characterised in that described first ups power includes:

First commutator, the first inverter and the first set of cells；

The voltage input end of described first inverter has three tunnels, and wherein two-way is as the voltage input end of described first ups power, An other road is connected with the voltage output end of described first set of cells；

The voltage output end of described first inverter has two-way, and wherein a road connects load circuit, separately leads up to described first Commutator is connected with the voltage input end of described first set of cells；

The voltage output end of described first set of cells connects through an A/D modular converter and connects described MCU module.

Ups power device the most according to claim 1, it is characterised in that described second ups power includes:

Second commutator, the second inverter and the second set of cells；

The voltage input end of described second inverter has three tunnels, and wherein two-way is as the voltage input end of described second ups power, An other road is connected with the voltage output end of described second set of cells；

The voltage output end of described second inverter has two-way, and wherein a road connects controlled switching circuit, separately leads up to described Second commutator is connected with the voltage input end of described second set of cells；

The voltage output end of described second set of cells connects through the 2nd A/D modular converter and connects described MCU module.

4. according to the ups power device described in claim 1-3 any one, it is characterised in that described power-fail detection circuit bag Include: rectification circuit, testing circuit and the comparison circuit being sequentially connected with；

Wherein, the voltage input end of described rectification circuit is as the voltage input end of described power-fail detection circuit；

The voltage output end of described comparison circuit is as the signal output part of described power-fail detection circuit.

Ups power device the most according to claim 4, it is characterised in that described rectification circuit is bridge rectifier, bag Include: diode D1, diode D2, diode D3 and diode D4；

Wherein, the positive pole of diode D1 is connected with the negative pole of described diode D3；The negative pole of diode D1 is negative with diode D2's Pole connects；The positive pole of described diode D3 and the equal ground connection of positive pole of described diode D4；The negative pole of described diode D4 is with described The positive pole of diode D2 connects；

The positive pole of described diode D1 and the positive pole of diode D2 connect the two-way voltage input end of described rectification circuit；And institute The negative pole stating diode D1 connects the voltage output end of described rectification circuit.

Ups power device the most according to claim 4, it is characterised in that described testing circuit includes: divider resistance R1, Divider resistance R2, switch triode Q1, storage capacitor C1 and charging resistor R3；

Wherein, described divider resistance R1 and described divider resistance R2 series connection, and described divider resistance R1 is away from described divider resistance One end of R2 is connected with the voltage output end of described rectification circuit；

The base stage of described switch triode Q1 is connected between described divider resistance R1 and described divider resistance R2, and colelctor electrode connects Between described storage capacitor C1 and described charging resistor R3；

Described charging resistor R3 is also associated with charge power supply V away from one end of the colelctor electrode of described switch triode Q1；

Described divider resistance R2 is away from one end, the emitter stage of described switch triode Q1 and the described storage of described divider resistance R1 Energy electric capacity C1 is away from the equal ground connection in one end of described charging resistor R3.

Ups power device the most according to claim 6, it is characterised in that described comparison circuit includes: the dividing potential drop electricity of series connection Resistance R4, divider resistance R5, also include comparator U1；

Described divider resistance R4 away from one end and described charging resistor R3 of described divider resistance R5 away from described switch triode Q1 colelctor electrode connects；Described divider resistance R5 is away from one end ground connection of described divider resistance R4；

Described comparator U1 includes two signal input parts, and wherein cold end connects the colelctor electrode of described switch triode Q1； Hot end connects between divider resistance R4 and divider resistance R5；

Described comparator U1 also includes: earth terminal, power input and signal output part；

The signal output part of described comparator U1 is as the signal port outfan of described power-fail detection circuit.

Ups power device the most according to claim 4, it is characterised in that also include: alarm device；

Described MCU module electrically connects with described alarm device.

Ups power device the most according to claim 8, it is characterised in that also include: display；

Described display is connected with described MCU module.

Ups power device the most according to claim 9, it is characterised in that also include: wireless communication module；

Described wireless communication module is connected with described MCU module；

Described MCU module is by described wireless communication module and host computer communication.