CN219458737U

CN219458737U - Backup storage battery pack power supply device of switching power supply system

Info

Publication number: CN219458737U
Application number: CN202220261523.1U
Authority: CN
Inventors: 张少文
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-02-09
Filing date: 2022-02-09
Publication date: 2023-08-01
Anticipated expiration: 2032-02-09

Abstract

The utility model relates to a backup storage battery power supply device of a switching power supply system, which comprises at least two switching power supply systems, wherein each switching power supply system consists of a backup storage battery, a switching power supply and a rear-end load, and the at least two switching power supply systems are connected in parallel through a dynamic interconnection control circuit; the communication dynamic control circuit comprises an operation state monitor, a controller, a communication device switch and a reverse charging mechanism; the running state monitor is used for detecting the running state of each switching power supply system in real time and sending a state signal to the controller, and the controller is used for receiving the state signal and controlling the connection device switch and the anti-charging mechanism to be switched on and off. According to the utility model, the switching power supply systems are connected in parallel through the interconnection dynamic control circuit, and according to the running condition of the switching power supply systems monitored in real time, the interconnection power supply modes and the independent power supply modes of the switching power supply systems are dynamically controlled, so that the overall power supply safety of the equipment is improved.

Description

Backup storage battery pack power supply device of switching power supply system

Technical Field

The utility model belongs to the field of communication power supply equipment, and particularly relates to a power supply device for a backup storage battery pack of a switching power supply system.

Background

With the rapid development of communication services, especially for 5G business, one power supply system of a communication machine room (including a sink node machine room, a large-load base station, a county company complex building, a core machine room, etc.) cannot meet requirements (such as insufficient backup time of a storage battery, insufficient output terminals of the power supply system, overload capacity of the load, etc.), a second switching power supply system (even a plurality of direct current switching power supply systems are built in the core machine room), and backup emergency storage batteries of each switching power supply system are generally 1-2 groups. The two power supply systems operate independently of each other and supply power to the back-end communication devices, respectively, as shown in fig. 2.

Because each direct current power supply system has different construction periods, particularly different development of carried loads, the load at the rear end of each power supply system has great difference in the backup time length of a storage battery of each direct current switch power supply system, the backup time length of the storage battery of each direct current switch power supply system is short and less than 2 hours, the emergency power generation time length is seriously insufficient, and great risks exist; some of the time is longer than 10 hours (especially, the newly built direct current power supply system), and resources are wasted. The embarrassing situation that the backup time of one power storage battery in the same machine room is too long and the backup time of the other power storage battery is seriously insufficient is caused.

In terms of the discharge efficiency of the battery, the discharge efficiency and the actual effective discharge capacity of the battery are directly affected by the large current (large load power supply system) discharge, and the discharge capacity is lower as the discharge current is larger. Such as 10 hours of discharge, can discharge 100% of the capacity; discharging according to the 3-hour rate, wherein only 75% of rated capacity can be discharged; if only 55% of the rated capacity can be discharged at a rate of 1 hour. Meanwhile, the high-current discharge electrode is easy to cause excessive water loss of the storage battery, and the service life of the storage battery is directly influenced. The current discharge of a small load (newly built power supply system) is easy to cause sulfation of the storage battery, so that the service life of the storage battery is also easy to shorten, and resources are wasted and cannot be fully utilized. Although the machine room is provided with two power supply systems, the two power supply systems are mutually independent, when one power supply system fails, the other power supply system cannot support participation, and power is supplied to loads connected with the failed power supply system, so that the overall power supply safety and reliability of the machine room are required to be improved.

In order to solve the above problems, the current practice mainly includes two kinds:

the first method is to cut and adjust the load, cut and adjust the partial rear load of the switching power supply with large load to the switching power supply with small load (such as new power supply), and reduce the difference of the discharging backup time length of the storage battery.

The second method is to replace the storage battery, and replace the backup storage battery of the switching power supply with high load with a high-capacity storage battery to prolong the backup discharging time.

However, the first method has the following disadvantages:

1. the load adjustment cutting is at great risk, especially some machine rooms with longer construction years are fully filled with cables in a bridge frame and a well, the cutting is very difficult, and the requirements on the skills of cutting personnel are high, and the cutting cost is high;

2. even if the regulation is carried out, the load of different direct current systems is increased or old equipment is removed from the network after a period of time, the guarantee time of the backup storage battery is changed (factors such as aging of the storage battery, load change and the like), the cutting-over regulation risk is also faced, and the network safety is threatened.

The second method has the following disadvantages:

1. the construction and maintenance cost for replacing the high-capacity storage battery is high, and the waste of the existing storage battery is caused;

2. the space resources of the machine room are limited, the bearing is insufficient, and the like, and particularly, most of the city sink nodes and the base station machine room are purchased common house surfaces, so that the realization is difficult.

Therefore, the common defects of the two types of power supply batteries are that the two types of power supply batteries cannot be mutually independent and are mainly standby no matter the two types of power supply batteries are load cut-over adjustment or replacement, and when any one of the two types of power supply batteries is in fault (such as lightning stroke, power supply system fault, storage battery performance degradation fault, full resistance of a rectifying module and the like), the other type of power supply system resources cannot be shared, only can be seen by hand, and even the defect of equipment downtime service interruption risk is directly caused.

Disclosure of Invention

The utility model aims to provide a backup storage battery pack power supply device of a switching power supply system aiming at the defects existing when two (or more) sets of power supply systems of a current machine room supply power, when the commercial power is normally supplied or the switching power is normally operated, the two (or more) sets of switching power supply systems independently operate to supply power to the back-end load respectively, manage the storage batteries respectively, charge according to set parameters and prevent the storage batteries from being crossed and overcharged; when the mains supply fails, the backup storage batteries of the two (or more) sets of power supply systems are connected in parallel to form a discharge energy pool for supplying power to the rear-end load, and each storage battery set dynamically adjusts the discharge current, so that the discharge efficiency of a plurality of groups of storage batteries is maximized, and the total emergency power generation duration of a machine room is prolonged. And the two sets of power supply systems cooperatively supply power to each other, so that the power supply safety and reliability of the machine room are improved.

The utility model realizes the above purpose through the following technical scheme:

the utility model provides a switching power supply system reserve storage battery power supply unit, includes two at least switching power supply systems, and every switching power supply system comprises reserve storage battery, switching power supply and rear end load, its characterized in that: the at least two switching power supply systems are connected in parallel through a dynamic interconnection control circuit;

the communication dynamic control circuit comprises an operation state monitor, a controller, a communication device switch and an inverse charging mechanism, wherein the operation state monitor is connected with each switch power supply system, the communication device switch is connected with a busbar of each switch power supply system, and the inverse charging mechanism is connected to a charge-discharge circuit of a backup storage battery of each switch power supply system;

the running state monitor is used for detecting the running state of each switching power supply system in real time, mainly comprises a mains supply state, the output voltage of the switching power supply, faults and the like, and sends a state signal to the controller, and the controller controls the connection device switch and the bypass switch of the anti-charging mechanism to be switched on and off based on the received state signal; in particular, the method comprises the steps of,

the running state monitor controls the liaison device switch through the controller, and can connect and disconnect the backup storage battery of each switching power supply system, and the backup storage battery of the two switching power supply systems jointly supplies power to the rear-end load during connection;

the running state monitor controls the anti-charging mechanism through the controller, so that the backup storage battery of each switching power supply system can be protected from anti-charging, undercharge and overcharging.

As a further optimization scheme of the utility model, the anti-charging mechanism comprises a diode and a bypass switch, wherein the diode is connected in series on a charge-discharge circuit of a backup storage battery of the switching power supply system, the bypass switch is connected in parallel with the diode, the bypass switch is controlled by a controller, and when the backup storage batteries of two or more switching power supply systems are discharged in parallel, the anti-charging of the backup storage battery is prevented, namely when a parallel direct current contactor of the backup storage battery is closed, the bypass switch of the anti-charging mechanism is opened, and the unidirectional conductivity of the diode is utilized to prevent the anti-charging of the backup storage batteries possibly caused by different voltages; when the parallel direct current contactor of the backup storage battery is opened, a bypass switch of the anti-charging mechanism is closed, and the short circuit diode realizes that two or more than two switching power supply systems manage and charge the respective backup storage battery, so that the backup storage battery is prevented from being insufficiently charged or overcharged.

As a further optimization scheme of the utility model, the connecting circuit of the liaison switch and each switching power supply is connected with a manual liaison closing switch in parallel, and a manual liaison opening switch is connected in series, and the arrangement of the two manual emergency forced switches can force to close or open the two switching power supply systems to work in parallel and is mainly used for providing convenience when an emergency or storage battery discharges.

As a further optimization scheme of the utility model, the communication dynamic control circuit also comprises a state indicating end connected with the controller, wherein the state indicating end comprises an indicating lamp which can display the communication running condition of the two current switching power supply systems.

As a further optimization scheme of the utility model, the communication dynamic control circuit further comprises a remote intelligent terminal, the remote intelligent terminal is connected with the controller through a wireless gateway, and the remote intelligent terminal comprises a computer or a mobile phone, so that the remote check of the running state data of the parallel and independent running of the switching power supply system is facilitated.

Compared with the existing load cut-over adjustment scheme, the utility model has the following advantages: the cutting adjustment is not needed, so that the network risk possibly caused by cutting and the related cost caused by cutting are avoided; the method has the advantages that no matter how much load is carried on the rear ends of two or more switch power supplies and how much performance of storage battery packs is, each storage battery pack performs self-adaptive real-time dynamic adjustment of discharge according to the self-discharge performance, so that the discharge of all storage battery packs faces to the respective favorable direction, the discharge performance and service life of the storage battery are greatly improved, the discharge with high capacity and high performance is more, the discharge with low capacity and low performance is less, all storage batteries can exert the respective maximum advantages, the discharge of the storage battery is always in the optimal state, the unfavorable situation of 'big maraca and small maraca' is avoided, the backup time of the whole storage battery of a machine room is prolonged, valuable time is won for emergency power generation, and low-voltage warning frequency is reduced;

the scheme of the utility model can realize that a plurality of switching power supply systems are mutually active and standby, and can rapidly supply power to equipment of a fault switching power supply system when one switching power supply system is abnormal or fails, thereby improving the overall power supply safety of a machine room. When the storage battery performs routine capacity discharge test, the on-site oil machine guarantee is needed to prevent service interruption caused by sudden power failure of a house when the storage battery is discharged, and the technical scheme is used for on-site guarantee without additionally dispatching the power generation car, so that another power supply system can be used as a standby power supply, and the on-site guarantee cost of the power generation car for the storage battery discharge test is saved.

The utility model has the beneficial effects that:

1) According to the utility model, two or more than two switching power supply systems are connected in parallel through the interconnection dynamic control circuit, and according to the running condition of each switching power supply system monitored in real time, the two power supply modes of interconnection power supply and independent power supply of the switching power supply systems are dynamically controlled, so that the respective advantages of the storage battery are brought into play, the backup time length is prolonged, the overall power supply safety of the equipment is improved, and the discharge test of the storage battery also does not need additional oil engine guarantee;

2) The whole power supply device is provided with the communication dynamic control circuit on the basis of the prior two or more than two switching power supply systems, and the device is simple and convenient to install;

3) The utility model adopts the anti-charging mechanism composed of the bypass switch and the unidirectional diode to protect the backup storage battery, and can prevent the storage batteries from being mutually charged and discharged, namely, being reversely charged when the backup storage battery of the switching power supply contacts with running; the battery is prevented from being undercharged or overcharged when the backup battery of the switching power supply is operated independently.

Drawings

Fig. 1 is a circuit diagram showing the connection of two switching power supply systems in embodiment 2 of the present utility model.

Fig. 2 is a circuit diagram of two prior art switching power supply systems.

In the figure: 1. a switching power supply system; 11. a backup battery pack; 12. a switching power supply; 13. a back end load; 2. connecting with a dynamic control circuit; 21. an operating state monitor; 22. a controller; 23. a liaison switch; 24. a reverse charging mechanism; 3. manually interconnecting to close the switch; 4. manually interconnecting and disconnecting the switch; 5. a status indication terminal; 6. and a remote intelligent terminal.

Detailed Description

The following detailed description of the present application is provided in conjunction with the accompanying drawings, and it is to be understood that the following detailed description is merely illustrative of the application and is not to be construed as limiting the scope of the application, since numerous insubstantial modifications and adaptations of the application will be to those skilled in the art in light of the foregoing disclosure.

In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model; in the description of the present utility model, unless otherwise indicated, the meaning of "at least two", "several" is two or more.

Example 1

The backup storage battery pack power supply device of the switching power supply system comprises more than two switching power supply systems 1, wherein each switching power supply system 1 consists of a backup storage battery pack 11, a switching power supply 12 and a rear end load 13; one of the switching power supply systems 1 is an initially set basic power supply system, the back-end load 13 is generally larger, and the other switching power supply systems 1 can be a plurality of switching power supply systems built later in the service development, and the back-end load is generally smaller.

The communication dynamic control circuit 2 comprises an operation state monitor 21, a controller 22, a communication device switch 23 and an inverse charging mechanism 24, wherein the operation state monitor 21 is connected with each switch power supply system 1, the communication device switch 23 is connected with a bus bar of a switch power supply 12 of each switch power supply system 1, and the inverse charging mechanism 24 is arranged on a charging and discharging circuit of a backup storage battery 11 of each switch power supply system 1;

the operation state monitor 21 is configured to detect an operation state of each switching power supply system 1 in real time, and mainly includes a mains supply state, an output voltage of the switching power supply 12, whether there is a fault, and the like, and send a state signal to the controller 22, where the controller 22 is configured to receive the state signal and control on-off of a bypass switch of the liaison switch 23 and the inverse charging mechanism 24;

the running state monitor 21 controls the liaison switch 23 through the controller 22, and can connect and disconnect the backup storage battery of the switching power supply system. When the two switch power supply systems are communicated, the backup storage battery packs 11 of the two switch power supply systems 1 jointly supply power to the rear-end load 13;

the running state monitor 21 controls the back-up battery pack 11 of each switching power supply system 1 through the controller 22 to protect the back-up battery pack 24 from back-charging, undercharge and overcharge;

the reverse charging mechanism 24 includes a diode connected in series to the charge-discharge circuit of the backup battery 11 of the switching power supply system 1, and a bypass switch connected in parallel to the diode, the bypass switch being controlled by the controller 22.

It should be noted that, the running state monitor 21 detects the information such as the mains supply state of each switching power supply system 1, the voltage of the backup storage battery 11, the running condition of the switching power supply 12, and the like in real time, and feeds back the information to the controller 22, and the controller 22 comprehensively judges and gives a command to turn on or off the liaison switch 23 and the bypass switch of the recharging mechanism 24, so as to realize parallel discharging or independent power supply of the backup storage battery 11 of two or more power supply systems;

when the mains supply of the machine room is in power failure, the running state monitor 21 detects a power failure signal of the switching power supply 12 and sends the power failure signal to the controller 22, the controller 22 sends an action instruction after judging, the liaison switch 23 is driven to be closed, the bypass switch of the anti-charging mechanism 24 is driven to be opened, the backup storage battery 11 of different switching power supply systems 1 is connected in parallel to construct a discharging energy pool, and meanwhile, the discharging energy pool is discharged to the rear-end load 13. At this time, in the backup battery pack 11, the new battery with large capacity is discharged more, and the old battery with small capacity is discharged less, so that the adverse situation of the previous "large cart and small cart" is avoided. The charge and discharge between the backup battery packs 11 are prevented due to the unidirectional conductivity of the diodes.

When the mains supply is recovered, the running state monitor 21 detects the incoming signal of the switching power supply 12 and sends the incoming signal to the controller 22, the controller 22 judges and then sends an action command to drive the liaison switch 23 to be disconnected and the inverse charging mechanism 24 to be connected by-pass switch, the two parallel switching power supply systems 1 are connected and separated, and are respectively charged according to the self-set charging current limiting value, so that the phenomenon that the service life of the storage battery is influenced by the water loss of the storage battery due to the cross overcharge or the insufficient charging of the backup storage battery 11 is avoided.

When one of the switching power supply systems 1 fails, such as a controller crashes (a power supply which is old and used often), a certain module overvoltage causes overvoltage protection and no output, so that a storage battery discharges, a lightning overvoltage module is damaged completely, and the like, the running state monitor 21 detects that the voltage of the storage battery is lower than a certain value or a voltage difference value (can be set), the controller 22 sends out an action command after judging, and the actuator acts to drive the liaison switch 23 to be closed, so that the service interruption of communication equipment of the failed switching power supply system 1 is prevented.

The communication dynamic control circuit 2 further comprises a status indication end 5 connected with the controller 22, wherein the status indication end 5 comprises an indicator lamp which can display the communication running status of all the current switching power supply systems 1;

the dynamic contact control circuit 2 further comprises a remote intelligent terminal 6, wherein the remote intelligent terminal 6 is connected with the controller 22 through a wireless gateway, and the remote intelligent terminal 6 comprises a computer or a mobile phone; the operation state data and the like of all the switching power supply systems 1 can be uploaded to the remote intelligent terminal 6, so that the remote monitoring and the checking of staff or administrators are facilitated.

The whole device is also provided with an emergency forced switch: the connection circuit of the liaison switch 23 and the switching power supply 12 is connected with a manual liaison closing switch 3 in parallel, and is connected with a manual liaison opening switch 4 in series, and the two manual emergency forced switches can be mainly used for providing convenience when one of the switching power supply systems 1 is in fault or abnormal emergency operation or daily maintenance operation (such as a storage battery discharging test).

Example 2

The present embodiment is basically the same as embodiment 1, except that two switching power supply systems 1 are adopted in the present embodiment, wherein one switching power supply system 1 is an initially set basic power supply system, the back end load 13 is generally larger, the other switching power supply system 1 is a plurality of switching power supply systems built later, the back end load is generally smaller, and the two power supply systems operate independently of each other to respectively supply power to the back end load 13, as shown in fig. 2;

after the two switching power supply systems 1 are connected in parallel by adopting a communication dynamic control circuit 2, the principle is the same as that of the embodiment 1, and the switching power supply system is specifically shown in fig. 1;

when the two switching power supply systems 1 operate, the running state monitor 21 detects the information such as the mains supply state of the two switching power supply systems 1, the voltage of the backup storage battery 11, the running condition of the switching power supply 12 and the like in real time, and feeds back the information to the controller 22, and the controller 22 comprehensively judges and gives a command to turn on or off the bypass switch of the liaison switch 23 and the inverse charging mechanism 24, so that the backup storage battery 11 of the two switching power supply systems 1 is discharged in parallel or independently powered.

The foregoing examples illustrate only a few embodiments of the utility model and are described in detail herein without thereby limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.

Claims

1. The utility model provides a switching power supply system reserve storage battery power supply unit, includes at least two switching power supply system (1), and every switching power supply system (1) comprises reserve storage battery (11), switching power supply (12) and rear end load (13), its characterized in that: the at least two switching power supply systems (1) are connected in parallel through a dynamic interconnection control circuit (2);

the communication dynamic control circuit (2) comprises an operation state monitor (21), a controller (22), a communication device switch (23) and an inverse charging mechanism (24); the running state monitor (21) is connected with each switching power supply system (1), the interconnecting device switch (23) is connected with a bus bar of a switching power supply (12) of each switching power supply system (1), and the anti-charging mechanism (24) is connected to a charging and discharging circuit of a backup storage battery (11) of each switching power supply system (1);

the running state monitor (21) is used for detecting the running state of each switching power supply system (1) in real time and sending a state signal to the controller (22), and the controller (22) is used for receiving the state signal and controlling the connection device switch (23) and the bypass switch of the anti-charging mechanism (24) to be switched on and off.

2. The backup battery pack power supply apparatus of claim 1, wherein: the anti-charging mechanism (24) comprises a diode and a bypass switch, wherein the diode is connected in series to a charge-discharge circuit of a backup storage battery pack (11) of the switching power supply system (1), the bypass switch is connected in parallel with the diode, and the bypass switch is controlled by a controller (22).

3. The backup battery pack power supply apparatus of claim 1, wherein: the connecting circuit of the interconnecting device switch (23) and the switching power supply (12) is connected with a manual interconnecting closing switch (3) in parallel, and is connected with a manual interconnecting opening switch (4) in series.

4. The backup battery pack power supply apparatus of claim 1, wherein: the dynamic contact control circuit (2) further comprises a state indicating end (5) connected with the controller (22), and the state indicating end (5) comprises an indicating lamp.

5. The backup battery pack power supply apparatus of claim 1, wherein: the dynamic contact control circuit (2) further comprises a remote intelligent terminal (6), the remote intelligent terminal (6) is connected with the controller (22) through a wireless gateway, and the remote intelligent terminal (6) comprises a computer or a mobile phone.