CN209104893U - Backup power system and backup power unit - Google Patents

Abstract

The utility model discloses a backup power supply system and a backup power supply device. The backup power supply system includes a power supply module and a control module, the power supply module and the control module are electrically connected in a detachable manner, the control module can be connected with an input power supply and a load device, and the input power supply can be connected through the control module. The module charges the power supply module, and the power supply module can supply power to the load device through the control module. In the standby power supply system provided by the utility model, the control module and the power supply module are modularized, which also makes the structure of the standby power supply simpler and the use more flexible. convenient.

Description

Backup power system and backup power unit

technical field

The utility model relates to the technical field of backup power supply, in particular to a backup power supply system and a backup power supply device.

Background technique

Backup power supply devices are widely used in banking, finance, communications and other industries that require stable power supply. The quality of their performance is directly related to the security of a large number of important data. However, the performance of intelligent backup power supply devices is not only related to circuit design and the quality of components In addition to being closely related, it is also related to the layout of each device. The layout directly affects the ease of maintenance of the device, the speed of maintenance and the quality of maintenance.

The defects of the existing low-power backup power supply devices are:

The structure occupies a large space, the cost of the structure is high, and the functional characteristics are single;

There are many radiating components in the cabinet, and the connection of each component is complicated, which is not only unfavorable for on-site installation, but also occupies a large space and costs a lot.

In addition, most of the existing backup power supplies cannot be switched between the commercial power supply and the backup power supply, that is, when the backup power supply fails, it will affect the power supply of the load.

Utility model content

In view of this, one of the objectives of the present invention is to provide a backup power supply system and a backup power supply device with a modular arrangement that makes the overall structure simpler.

In a first aspect, a backup power supply system is provided, including a power supply module and a control module, the power supply module and the control module are electrically connected in a detachable manner, and the control module can be connected to an input power supply and a load device, so that the The input power supply can charge the power supply module through the control module, and the power supply module can supply power to the load device through the control module.

Preferably, the control module includes a conversion portion capable of converting alternating current to direct current and direct current to alternating current, and,

A switching bypass, the switching bypass is connected in parallel with the conversion part, when the switching bypass is turned on, the input power is communicated with the load device through the switching bypass, and when the switching bypass is connected When the transfer bypass is disconnected, the input power is communicated with the load device through the conversion part.

Preferably, a transfer switch device is provided on the transfer bypass, and the transfer switch device includes a first switch S1, a third switch S3, a first branch and a second branch. The two ends are respectively connected to the input power supply and the a terminal of the third switch S3, and the two ends of the second branch are respectively connected to the c terminal of the first switch S1 and the b terminal of the third switch S3. The input terminal of the standby power supply is connected to the a terminal of the first switch S1, the input terminal of the input power supply is connected to the b terminal of the first switch S1, and the c terminal of the third switch S3 is connected to the output terminal.

Preferably, the conversion part includes: a first conversion part capable of converting alternating current into direct current;

a second conversion part capable of converting direct current into alternating current,

The output terminal of the first conversion part is connected to the input terminal of the second conversion part.

Preferably, the power supply module includes a battery connected between the first conversion part and the second conversion part.

Preferably, the power supply module further includes a control system, the control system and the control module form a dual management system, and one of the control system and the control module controls the backup power supply system.

Preferably, the control system can remotely transmit data to a control terminal, and the backup power system can be monitored through the control terminal.

In a second aspect, a backup power supply device is provided, including the above-mentioned backup power supply system.

Preferably, it includes a box body, the box body includes a first cavity and a second cavity, the control module is arranged in the first cavity, and the power supply module is arranged in the second cavity.

Preferably, a part of the box body corresponding to the second cavity is provided with a heat dissipation structure, and the heat dissipation structure includes a heat dissipation hole formed on the box body.

Preferably, the heat dissipation structure further includes a heat dissipation fan, and the heat dissipation fan can blow air into the second cavity through the heat dissipation hole.

In the standby power supply system provided by the utility model, the control module and the power supply module are modularized, which also makes the structure of the standby power supply simpler and the use more flexible. convenient.

Description of drawings

The above-mentioned and other objects, features and advantages of the present utility model will become more apparent from the following description of the embodiments of the present utility model with reference to the accompanying drawings, in which:

Fig. 1 shows the structure block diagram of the standby power supply provided by the present invention;

Fig. 2 shows the control circuit schematic diagram of the backup power supply;

3 and 4 show a schematic diagram of the box body structure of the standby power supply device.

Detailed ways

The present invention is described below based on examples, but the present invention is not limited to these examples. It will be understood by those of ordinary skill in the art that the drawings provided herein are for illustrative purposes and that the drawings are not necessarily drawn to scale.

Unless clearly required by the context, words such as "including", "comprising" and the like throughout the specification and claims should be construed in an inclusive rather than an exclusive or exhaustive sense; that is, "including but not limited to" meaning.

In the description of the present invention, it should be understood that the terms "first", "second" and the like are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

The backup power supply system provided by the utility model is used for emergency power supply to the load equipment. For example, when the commercial power fails, the backup power supply system can supply power to the load within a certain period of time.

As shown in FIG. 1 , the backup power supply system provided by the present invention includes a power supply module 1 and a control module 2 . The power supply module 1 and the control module 2 are electrically connected, and the power supply module 1 is supplied to the power supply module 1 through the control module 2 . charging, and supplying power to the load device through the control module 2 . Preferably, the power supply module 1 and the control module 2 are connected through a plug-in structure, for example, the power supply module 1 and the control module 2 can be electrically connected through a structure in which a plug is matched with a socket. And easy to disassemble.

The control module 2 includes a first port 21, a second port 22 and a third port 23. The first port 21 constitutes an input end of the control module 2 and is connected to an input power supply. Preferably, the input power supply is: Mains power, the second port 22 is connected to the load device and supplies power to the load device. The third port 23 is connected to the power supply module 1 . The power supply module 1 includes a battery. Preferably, the battery for supplying is a lithium titanate battery, the input and output of the lithium titanate battery are both 110V alternating current, and the battery voltage is 24V. The power supply module 1 can be supplied with power through the third port 23, so that the power supply module 1 can be charged, and the power supply module 23 can also supply power to the control module 2 through the third port 23, So that the second port 22 of the control module 2 can supply power to the load device. The control module 2 includes a conversion part, which can convert direct current and alternating current. In this embodiment, the conversion part includes a first conversion part 24 and a second conversion part 25 , the first conversion part The input end of 24 constitutes the first port 21, the first port 21 is connected to an input power source, the input power source inputs alternating current, and the first conversion part 24 can convert the alternating current into direct current. The output terminal of the first conversion part 24 is connected to the input terminal of the second conversion part 25 , and the DC current output by the first conversion part 24 enters the second conversion part 25 , and the second conversion part 25 can To convert direct current into alternating current, the output end of the second conversion part 25 constitutes the second port 22 , and the second port 22 is connected to a load device to provide alternating current power to the load device. The third port 23 is connected between the first converting part 24 and the second converting part 25 , that is, the third port 23 is connected to the output end of the first converting part 24 and the second converting part 25 . Between the input ends of the conversion part 25, the power input or output at the third interface 23 is direct current.

The control part 2 also includes a switching bypass 26, the switching bypass 26 is connected in parallel with the conversion part, that is, the first end of the switching bypass 26 is connected to the first port of the control module 2 21 , the second end of the switching bypass 26 is connected to the second port 22 . The transfer bypass 26 is provided with a transfer switch device 261. In a normal working state, that is, when the conversion part can work normally, the transfer switch device 261 is in a disconnected state, that is, the transfer The bypass 26 is disconnected, and the current flows to the load equipment through the conversion part; when the conversion part fails, that is, the conversion part cannot be energized normally, the transfer switch device 261 is switched to the on state, that is, the The transfer bypass 26 is turned on, and the current flows to the load device through the transfer bypass 26, so as to ensure that the load device can be powered normally.

Preferably, the specific structure of the transfer switch device 261 is shown in FIG. 2 , including a first switch S1 , a second switch S2 , a third switch S3 and a fourth switch S4 , and the transfer switch device 261 further includes a first switch S1 , a second switch S2 , a third switch S3 and a fourth switch S4 . A branch 2611 and a second branch 2612, the two ends of the first branch 2611 are respectively connected to the mains and the terminal a of the third switch S3, and the two ends of the second branch 2612 are respectively It is connected to the c terminal of the first switch S1 and the b terminal of the third switch S3. The input terminal of the backup power supply is connected to the a terminal of the first switch S1, the input terminal of the commercial power supply is connected to the b terminal of the first switch S1, and the c terminal of the third switch S3 is connected to the output terminal. The first switch S1 and the third switch S3 are arranged on the live wire (L) circuit, and the first branch 2611 and the second branch 2612 are also arranged before the second switch S2 and the fourth switch S4, and in the same way. The connection method is set on the neutral line (N) circuit.

When the backup power supply device can operate normally, the third switch S3 and the fourth switch S4 are connected to b, and the first switch S1 and the second switch S2 are connected to a, that is, after the current flows through the conversion part Supply power to the load device. And in this state, after the current flowing through the conversion part is converted into direct current by the first conversion part 24, the power supply module 1 can also be charged, so as to ensure the power supply of the power supply module 1 in a normal state. In this state, when the commercial power supply fails, the power supply module 1 has sufficient power to ensure that it can effectively supply power to the load device. When the conversion part fails and cannot be powered on normally, the third switch S3 and the fourth switch S4 are connected to a, so that the output line is connected to the mains. At this time, the power supply module 1 cannot be charged and discharged.

Preferably, the power supply module 1 adopts LLC resonant soft switching and synchronous rectification technology (the mains input is charged by the DC power rectified by the PFC and LLC resonant conversion of the charging module, and the output filter circuit rectifies the battery). When 110V AC mains is input, The power supply module 1 inverts the alternating current into direct current through the LLC resonant soft switching and synchronous rectification technology to charge the battery, while the alternating current input passes through the conversion to bypass 26 to supply power to the load normally. The conversion part is in a shutdown state.

The conversion part adopts PWM+SPWM high-frequency technology (the battery input is passed through the full-bridge inverter of the inverter, LCl filtering, and the full-bridge inverter circuit outputs alternating current). When power is supplied, the conversion part works to provide a stable output for the load.

The standby power supply system provided by the utility model can quickly respond to changes in the external environment, provide uninterrupted high-quality AC output in real time, has a complete safety protection function, has DC input anti-reverse connection and DC input buffer protection, and has the functions of overvoltage, Comprehensive protection measures such as overload, short circuit, over temperature, temperature control fan and fault.

Preferably, the power supply module 1 further includes a control system, and the control system and the control module 2 form a dual management system. When the control module 2 can operate normally, the control module 2 can control the backup power supply system. Control, when the control module 2 cannot perform control normally, the management control system in the power supply module 1 controls the backup power supply. Further, the control system of the power supply module 1 can also perform remote transmission, that is, it can transmit the real-time status of the power supply module 1 to the control terminal, and the user can monitor the power supply module 1 through the control terminal. Preferably, The control terminal includes a mobile phone, a computer, and the like.

Preferably, when the standby power supply system discharges to the first-level discharge cut-off voltage according to the set parameters, the control module 2 sends an instruction to the power supply module 1 to stop the discharge of the power supply module 1 . This instruction is a primary battery over-discharge protection instruction. When the over-discharge command of the control module 2 fails (the power supply module 1 does not respond, or the communication is abnormal), when the power supply module 1 is over-discharged to the secondary over-discharge protection value, the control system of the power supply module 1 responds to the secondary over-discharge protection value by itself Protection, automatically cut off the battery switch on the protection board, this command is a secondary protection command. The primary and secondary protections are paralleled, and the charging and discharging of the backup power system are double managed, so that the reliability, stability and safety of the backup power system are higher. Further, when the power supply module 1 is overcharged, overtemperature, overcurrent, etc., the power supply module 1 can be protected by the above protection method.

The present invention also provides a backup power supply device, including the above-mentioned backup power supply system. Specifically, as shown in FIGS. 3 and 4 , the backup power supply device includes a box body 10 , and a accommodating cavity is formed in the box body 10 . The accommodating cavity is provided with a partition 101, the partition 101 divides the accommodating cavity into a first cavity 102 and a second cavity 103, the first cavity 102 is used for accommodating the control module 2, the second cavity The cavity 103 is used to accommodate the power supply module 1 . The control module 2 and the power supply module 1 are respectively arranged in different cavities, which is conducive to their respective heat dissipation, and will not affect each other. Preferably, a part of the box body 10 opposite to the second cavity 103 is provided with a heat dissipation structure. The heat dissipation holes 104 are formed on a plurality of side walls of the box body 10 . Alternatively, the heat dissipation structure further includes a heat dissipation fan, and one or more heat dissipation fans are provided, and the heat dissipation fan is disposed at a position corresponding to the heat dissipation hole 104 for blowing air into the second cavity 103 , In order to speed up the air flow in the second cavity 103 , the heat dissipation of the power supply module 1 is accelerated.

The box body 10 is also provided with a mounting portion 104, and the mounting portion 104 is used for the fixed installation of the box body 10. Preferably, in this embodiment, the mounting portion 104 is configured to be installed on the box body. The annular structure provided on the top of the 10, the mounting portion 104 is provided with a plurality of.

The standby power supply system provided by the utility model can ensure the normal power supply of the load equipment when the mains power supply or the standby power supply fails by setting the transfer bypass, thereby improving the reliability of the power supply. Moreover, the modular arrangement of the control module and the power supply module also makes the structure of the backup power supply simpler and more convenient.

Those skilled in the art can easily understand that, on the premise of no conflict, the above preferred solutions can be freely combined and superimposed.

It should be understood that the above-mentioned embodiments are only exemplary rather than restrictive, and those skilled in the art can make various obvious or equivalent to the above-mentioned details without departing from the basic principles of the present invention. Modifications or replacements will be included within the scope of the claims of the present invention.

Claims (11)

1. A backup power supply system, characterized in that, comprising a power supply module and a control module, the power supply module and the control module are electrically connected in a detachable manner, and the control module can be connected with an input power supply and a load device, The input power supply can charge the power supply module through the control module, and the power supply module can supply power to the load device through the control module. 2. The backup power system of claim 1, wherein the control module includes a conversion portion capable of converting alternating current to direct current and direct current to alternating current, and, A switching bypass, the switching bypass is connected in parallel with the conversion part, when the switching bypass is turned on, the input power is communicated with the load device through the switching bypass, and when the switching bypass is connected When the transfer bypass is disconnected, the input power is communicated with the load device through the conversion part. 3. The backup power system according to claim 2, wherein a transfer switch device is provided on the transfer bypass, and the transfer switch device comprises a first switch S1, a third switch S3, a first switch circuit and a second branch, the two ends of the first branch are respectively connected to the input power supply and the a terminal of the third switch S3, and the two ends of the second branch are respectively connected to the first switch The c terminal of S1 and the b terminal of the third switch S3 are connected, the input terminal of the backup power supply is connected to the a terminal of the first switch S1, and the input terminal of the input power supply is connected to the b terminal of the first switch S1. The c terminal of the third switch S3 is connected to the output terminal. 4 . The backup power system according to claim 2 , wherein the conversion part comprises: a first conversion part capable of converting alternating current into direct current; 4 . a second conversion part capable of converting direct current into alternating current, The output terminal of the first conversion part is connected to the input terminal of the second conversion part. 5 . The backup power system according to claim 4 , wherein the power supply module comprises a storage battery, and the storage battery is connected between the first conversion part and the second conversion part. 6 . 6. The backup power system according to any one of claims 1-5, wherein the power supply module further comprises a control system, the control system and the control module form a dual management system, the control system and the control system One of the control modules controls the backup power system. 7 . The backup power system according to claim 6 , wherein the control system can remotely transmit data to a control terminal, and the backup power system can be monitored through the control terminal. 8 . 8. A backup power supply device, characterized in that it comprises the backup power supply system according to any one of claims 1-7. 9 . The backup power supply device according to claim 8 , characterized in that it comprises a box body, the box body includes a first cavity and a second cavity, the control module is arranged in the first cavity, and the power supply A module is disposed in the second cavity. 10 . The backup power supply device according to claim 9 , wherein a part of the box body corresponding to the second cavity is provided with a heat dissipation structure, and the heat dissipation structure comprises a heat dissipation structure formed on the box body. 11 . hole. 11 . The backup power supply device according to claim 10 , wherein the heat dissipation structure further includes a heat dissipation fan, and the heat dissipation fan can blow air into the second cavity through the heat dissipation hole. 12 .