CN217824324U

CN217824324U - Redundant direct current UPS power supply

Info

Publication number: CN217824324U
Application number: CN202221252812.1U
Authority: CN
Inventors: 李刚; 张迪; 游建斌; 龚铭远; 谢克峰; 戴维; 洪建军; 雷勇杰; 贺秦南; 陈平
Original assignee: General Designing Institute of Hubei Space Technology Academy
Current assignee: General Designing Institute of Hubei Space Technology Academy
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2022-11-15
Anticipated expiration: 2032-05-20

Abstract

The application discloses a redundant direct-current UPS power supply, which relates to the technical field of UPS power supplies and comprises a health management module, a storage battery, a switching module and a plurality of AC/DC modules; the storage battery is connected with the AC/DC module in parallel through the switching module, and a plurality of the AC/DC modules are connected in parallel; the health management module is connected to the switching module and the plurality of AC/DC modules, and is configured to: and when the AC/DC module has no output voltage, controlling the switching module to conduct a line of the storage battery so that the storage battery outputs the voltage, or when the AC/DC module has the output voltage and the storage battery needs to be charged, controlling the switching module to conduct a line of the storage battery so that the AC/DC module charges the storage battery through the line. The technical problems that the existing AC/DC converter is unreliable in power supply and the storage battery has no charging management in the related technology can be solved.

Description

Redundant direct current UPS power supply

Technical Field

The application relates to the technical field of UPS power supplies, in particular to a redundant direct current UPS power supply.

Background

On traditional special vehicle, vehicle low pressure direct current adopts the external commercial power of AC/DC converter, or the battery power supply, and current AC/DC converter power supply switch to the battery power supply occasionally the switching time requirement, still has the short time outage in theory, and then causes the discontinuous continuous power supply use that the power down influence system that appears of supplying power. The storage battery is directly connected in parallel to an output line of the AC/DC converter, and has no charge-discharge management function, and the very high charging voltage and uncontrollable charging current are not favorable for the service life of the storage battery.

Disclosure of Invention

The embodiment of the application provides a redundant direct current UPS power supply to solve the technical problems that the power supply of an existing AC/DC converter is unreliable and a storage battery has no charging management in the related art.

The embodiment of the application provides a redundant direct current UPS power supply, which comprises a health management module, a storage battery, a switching module and a plurality of AC/DC modules;

the storage battery is connected with the AC/DC module in parallel through the switching module, and a plurality of the AC/DC modules are connected in parallel;

the switching module comprises two NMOS tubes, and the NMOS tubes are reversely connected with diodes in parallel; the source electrode of the first NMOS tube is connected with the source electrode of the second NMOS tube, the drain electrode of the first NMOS tube is connected with the output end of the AC/DC module, and the grid electrode of the first NMOS tube is connected with the health management module; the drain electrode of the second NMOS tube is connected with the positive electrode of the storage battery, and the grid electrode of the second NMOS tube is connected with the positive electrode of the storage battery through the starting switch;

the health management module is further coupled to each of the plurality of AC/DC modules and configured to:

when the AC/DC module has no output voltage, the second NMOS tube is controlled to conduct the line of the storage battery so that the storage battery outputs the voltage, or,

when the AC/DC module has output voltage and the storage battery needs to be charged, the first NMOS tube is controlled to conduct a line of the storage battery so that the AC/DC module charges the storage battery through the line.

In some embodiments, a main output control switch is further disposed on an output line of the AC/DC module, and the main output control switch is controlled by the health management module.

In some embodiments, the health management module is further connected with a voltage sensor and a current sensor, the voltage sensor is configured to collect the charging current of the storage battery, and the current sensor is configured to collect the charging voltage of the storage battery;

meanwhile, the health management module is also configured to control the AC/DC module to dynamically adjust the charging voltage parameter of the storage battery according to the charging current and the charging voltage.

In some embodiments, the health management module is connected to the AC/DC module via a CAN bus such that it controls the AC/DC module to dynamically adjust the charging voltage parameter to the battery.

In some embodiments, the number of the AC/DC modules is two, and the two AC/DC modules are redundant with each other.

In some embodiments, the battery is integrated with all of the AC/DC modules.

In some embodiments, further comprising:

and the output end of the auxiliary power supply is connected with the health management module, and the input end of the auxiliary power supply is connected with the AC/DC module or the storage battery.

In some embodiments, the auxiliary power source is further connected to the battery through the start switch.

In some embodiments, further comprising:

and the display screen is connected with the health management module through an RS232 bus.

In some embodiments, further comprising:

and the upper computer is connected with the health management module through a CAN bus.

The technical scheme who provides this application brings beneficial effect includes: the multiple AC/DC modules are connected in parallel to supply power, when any one AC/DC module fails, the rest AC/DC modules continue to supply power to ensure the reliability of power supply, and the AC/DC modules can be connected in parallel by the multiple modules according to the modular design to increase the output capacity of the UPS; when the storage battery needs to be supplied with power, the health management module can control the switching module to communicate the AC/DC module with the storage battery so that the storage battery is charged by the AC/DC module; the health management module controls the switching module to be communicated with the output line of the storage battery when all the AC/DC modules do not have voltage output, so that the output voltage of the direct current UPS is provided by the storage battery, and the health management module can be seamlessly switched to the storage battery for power supply when the AC/DC modules do not have the output voltage, thereby further ensuring the reliability of the power supply of the direct current UPS.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic block diagram of a portion of a redundant dc UPS power supply provided by an embodiment of the present application;

fig. 2 is another functional block diagram of a redundant dc UPS power supply according to an embodiment of the present disclosure;

fig. 3 is a schematic block diagram of a redundant dc UPS power supply according to an embodiment of the present disclosure.

The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in 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 obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The flowcharts shown in the figures are illustrative only and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to be performed in the order described. For example, some operations/steps may be decomposed, combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.

The embodiment of the application provides a redundant direct-current UPS (uninterrupted power supply), which supplies power after a plurality of AC/DC modules are connected in parallel, when any one AC/DC module fails, the rest AC/DC modules continue to supply power so as to ensure the reliability of power supply, and the AC/DC modules can be connected in parallel by a plurality of modules according to the modular design to increase the output capacity of the UPS; when the storage battery needs to be supplied with power, the health management module can control the switching module to communicate the AC/DC module with the storage battery so that the storage battery is charged by the AC/DC module; the health management module controls the switching module to be communicated with the output line of the storage battery when all the AC/DC modules do not have voltage output, so that the output voltage of the direct current UPS is provided by the storage battery, and the health management module can be seamlessly switched to the storage battery for power supply when the AC/DC modules do not have the output voltage, thereby further ensuring the reliability of the power supply of the direct current UPS.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

As shown in fig. 1, an embodiment of the present application provides a redundant DC UPS power supply, which includes a health management module, a storage battery, a switching module, and a plurality of AC/DC modules;

The storage battery and the AC/DC modules are connected in parallel, the switching module is arranged on an output line of the storage battery, and the conduction and the isolation of the switching module are controlled by the health management module. The health management module has a health state monitoring function and can monitor the output voltage and current, the temperature and the working time data of the AC/DC module in real time and monitor the charging and discharging current, the voltage and the working state data of the storage battery in real time. Therefore, when the alternating current is input into one or more AC/DC modules, the one or more AC/DC modules can output voltage, at the moment, if the health management module monitors that the storage battery needs to be charged, the switching module is conducted, and the voltage output by the AC/DC modules further charges the storage battery. And if the health management module monitors that the AC/DC module does not output voltage, the switching module is conducted, and the storage battery outputs voltage outwards.

Therefore, the AC/DC modules in the embodiment of the application are redundant mutually, so that the stable reliability of the output voltage is ensured; meanwhile, when the AC/DC module has no output voltage, the health management module can monitor the output voltage of the storage battery in real time and control the storage battery to output the voltage outwards through the switching module, so that the aim of emergency power supply is fulfilled.

The switching module comprises two NMOS tubes, and the NMOS tubes are reversely connected with diodes in parallel; the source electrode of the first NMOS tube is connected with the source electrode of the second NMOS tube, the drain electrode of the first NMOS tube is connected with the output end of the AC/DC module, and the grid electrode of the first NMOS tube is connected with the health management module; the drain electrode of the second NMOS tube is connected with the positive electrode of the storage battery, and the grid electrode of the second NMOS tube is connected with the positive electrode of the storage battery through the starting switch.

In this embodiment, the battery charge is in a different current direction than the battery supply.

When the storage battery needs to be charged, the health management module sends a high level signal to the grid electrode of the first NMOS tube T1 through the A2 port, the source electrode and the drain electrode of the first NMOS tube T1 are conducted, the power output by the AC/DC module flows to the storage battery through the first NMOS tube T1 and the diode D2, the storage battery is charged, and the power of the storage battery cannot be output outwards due to the fact that the diode D1 is connected in parallel in the reverse direction.

When the storage battery is required to discharge, the health management module controls the starting switch to be communicated with the positive electrode of the storage battery and the grid electrode of the second NMOS tube T2 through the M port, at the moment, the grid electrode level of the second NMOS tube T2 is pulled high, the source electrode and the drain electrode of the second NMOS tube T2 are conducted, the storage battery outputs voltage outwards, and the voltage cannot flow to the storage battery when the AC/DC module has the output voltage.

Furthermore, a main output control switch is further arranged on an output line of the AC/DC module, and the main output control switch is controlled by the health management module.

In this embodiment, the health management module is connected to the main output control switch through an A2 port, and drives the main output control switch to control the output of the AC/DC module according to the monitored condition of the AC/DC module.

Further, a voltage sensor and a current sensor are connected to the health management module, wherein the voltage sensor is configured to collect the charging current of the storage battery, and the current sensor is configured to collect the charging voltage of the storage battery;

Still further, the health management module is connected with the AC/DC module through a CAN bus so as to control the AC/DC module to dynamically adjust the charging voltage parameter of the storage battery.

In this embodiment, the health management module is connected to the current sensor through the AI1 port, and is connected to the voltage sensor through the AI2 port, and the voltage sensor and the current sensor are distributed at two ends of the switching module, and the voltage sensor is disposed near the battery.

Specifically, the AC/DC module includes a rectifying unit, a DC/DC converter, a power supply, a main control unit and a voltage/current sensor, a single AC/DC module is designed to output 28V/100A, and each unit and its composition in the AC/DC module may be any one of the prior art, and detailed descriptions of the specific AC/DC module are omitted here.

The health management module is connected with the main control unit 1 and the main control unit 2 through the CAN bus 1, and controls the main control unit 1 and the main control unit 2 through the CAN bus 1 according to the charging current and the charging voltage so as to dynamically adjust the charging voltage parameter of the storage battery supplied by the AC/DC module.

As shown in fig. 1 and 3, in a specific embodiment, the number of the AC/DC modules is two, and the two AC/DC modules are redundant with each other.

Further, the battery is provided integrally with all of the AC/DC modules. In this embodiment, the highly integrated module meets the requirement of narrow space installation.

As shown in fig. 3, as a preferred embodiment of the present application, the method further includes:

Further, the auxiliary power supply is also connected with the storage battery through the starting switch.

As shown in fig. 2, it preferably further includes:

Preferably, the method further comprises the following steps:

In this embodiment, the auxiliary power supply supplies power to the display screen in addition to the health management module. The health management module monitors the AC/DC module and the storage battery, and uploads faults or time to the upper computer through the CAN bus 2 to form a database of the redundant direct-current UPS power supply, so that the faults and the service life CAN be predicted by using data. Meanwhile, states such as 'alarm', 'fault' and the like can be divided according to comparison between the monitored information and a set response threshold value, and the states are displayed on a screen by a display.

And the health management module has the storage functions of power-on time, state information and fault state, can record no less than 100 pieces of fault information, and automatically covers the earliest data by the latest data after exceeding 100 pieces of fault information, wherein the data record is required not to be damaged.

Furthermore, the health management module has the functions of SoC estimation and SoC self-calibration of the storage battery, the charging and discharging current and voltage state data of the storage battery are acquired through the current sensor and the voltage sensor, the SoC estimation of the storage battery is carried out by adopting an ampere-hour integration method and combining with the SoC correction value generated by the storage battery parameters, and the SoC is automatically calibrated to 100% capacity after the storage battery is fully charged;

wherein I is the charging and discharging current of the storage battery,SoC _{correction amount} SoC correction values generated for battery parameters.

As shown in fig. 1 to 3, the present disclosure will be described in detail with reference to a specific embodiment.

The embodiment of the application provides a redundant direct current UPS power supply, which comprises a health management module, an AC/DC module 1, an AC/DC module 2, a main control output control switch, a storage battery, a starting switch, a switching module, a display screen, an upper computer, an auxiliary power supply, a current sensor and a voltage sensor.

The AC/DC module 1 and the AC/DC module 2 are the same module, alternating current input outputs direct current through the AC/DC module 1 and the AC/DC module 2 which are connected in parallel, and whether the output direct current is controlled to a voltage bus or not is controlled through the on-off control of the main control output control switch.

The input end of the auxiliary power supply is connected with the AC/DC module 1 and the AC/DC module 2, the input end of the auxiliary power supply is also connected with the storage battery through the starting switch, and the output end of the auxiliary power supply is connected with the health management module and the display screen to supply power for the health management module and the display screen.

The health management module is connected with the display screen through an RS232 bus, is connected with an AC/DC module 1 and an AC/DC module 2 through a CAN bus 1, is sequentially connected with a main output control switch, a starting switch, a switching module, a current sensor and a voltage sensor through an A1 port, an A2 port, an M port, an AI1 port and an AIA2 port respectively, and one end of the switching module, which is close to the storage battery, is provided with the voltage sensor while the other end is provided with the current sensor.

Furthermore, the health management module has a health state monitoring function, CAN monitor the data of the output voltage, current, temperature and working time of the AC/DC module 1 and the AC/DC module 2, the data of the charging and discharging current, voltage and working state of the storage battery in real time, upload related information such as faults or alarms to an upper computer through the CAN bus 2, display faults through a display screen, and have a storage function of the power-on time, the state information and the fault state; the direct current UPS power supply can be rapidly diagnosed and failure alarm is guaranteed when the direct current UPS power supply fails, rapid maintenance is facilitated, and the intelligence of equipment is guaranteed.

Furthermore, the health management module has the functions of storage battery SoC estimation and SoC self-calibration, is beneficial to the service life of the battery, and simultaneously knows the working state of the battery, thereby being beneficial to the function of using the battery to supply power in the normal process. Specifically, charging and discharging current and voltage state data of the storage battery are acquired through a current sensor and a voltage sensor, an ampere-hour integration method is adopted to combine SoC correction values generated by storage battery parameters to carry out SoC estimation on the storage battery, and the SoC is automatically calibrated to 100% capacity after the storage battery is fully charged;

wherein I is the charging and discharging current of the storage battery, soC _{Correction amount} SoC correction values generated for battery parameters.

The AC/DC module 1, the AC/DC module 2 and the storage battery adopt an integrated design, and the double AC/DC modules are redundant and provide emergency power supply for the storage battery, so that the output reliability of the direct-current UPS is ensured; the AC/DC module 1 and the AC/DC module 2 are the same module, when any AC/DC module fails, the other module is not affected, and redundant backup is ensured; meanwhile, after the AC/DC module 1 and the AC/DC module 2 are output in parallel, the AC/DC module and the storage battery are connected in parallel through the switching module, and the AC/DC module can be switched to the storage battery for supplying power in an emergency and seamless mode under the condition of no AC input; the switching module has the function of automatically and seamlessly switching to the output power supply of the storage battery, ensures reliable power supply under emergency working conditions and comprises an NMOS tube T1, an NMOS tube T2, a diode D1 and a diode D2.

When power needs to be supplied, the NMOS tube T2 is controlled to work by closing the starting switch, and the storage battery outputs voltage to the voltage bus through the diode D1; then, the health management module is started, and under the condition of alternating current input, the health management module controls the closing of the main control output control switch to enable the AC/DC module 1 and the AC/DC module 2 to output voltage; when the storage battery needs to be charged, the health management module controls the NMOS tube T1 to be conducted and operated through the A2 port, meanwhile, the health management module collects charging current and charging voltage through the current sensor and the voltage sensor, controls the AC/DC module 1 and the AC/DC module 2 to dynamically adjust the charging voltage of the storage battery through the CAN bus 1, and controls the NMOS tube T1 to be cut off through the A2 port until the storage battery is fully charged; under the condition of no alternating current input, the switching module automatically and seamlessly switches to the storage battery for supplying power, and meanwhile, in order to reduce the voltage drop of the output of the storage battery, the health management module also needs to control the NMOS tube T1 to be cut off through the A2 port.

Therefore, the redundant direct-current UPS provided by the embodiment has the advantages that the double AC/DC modules are redundant in structure, convenient to operate, simple in structure and highly integrated, meanwhile, the AC/DC modules can be automatically and seamlessly switched to the storage battery function through the switching modules, the power supply redundancy reliability of the direct-current UPS and the management function of the storage battery are guaranteed, and the power supply use of the system is not influenced at any time.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, 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. Also, 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 a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. 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 application. Thus, the present application 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

1. A redundant direct current UPS power supply is characterized by comprising a health management module, a storage battery, a switching module and a plurality of AC/DC modules;

2. A redundant DC UPS power supply according to claim 1 wherein a main output control switch is further provided on an output line of said AC/DC module, said main output control switch being controlled by said health management module.

3. A redundant dc UPS power supply according to claim 1 wherein:

the health management module is also connected with a voltage sensor and a current sensor, the voltage sensor is configured to collect the charging current of the storage battery, and the current sensor is configured to collect the charging voltage of the storage battery;

4. A redundant DC UPS power supply according to claim 3 wherein said health management module is coupled to said AC/DC module via a CAN bus such that it controls said AC/DC module to dynamically adjust charging voltage parameters to said battery.

5. The redundant DC UPS power supply of claim 1 wherein the number of AC/DC modules is two, the two AC/DC modules being redundant of each other.

6. A redundant DC UPS according to claim 1 or claim 5, wherein the battery is provided integrally with all of the AC/DC modules.

7. A redundant dc UPS power supply according to claim 1 further comprising:

8. A redundant dc UPS power supply according to claim 7 wherein said auxiliary power supply is further connected to said battery through said start switch.

9. A redundant dc UPS power supply according to claim 1 further comprising:

10. A redundant dc UPS power supply according to claim 1 further comprising: