CN202455149U - Power supply system for supplying electronic equipment and frame power supply - Google Patents

Abstract

The present utility model provides a power supply system for electronic equipment and a corresponding frame power supply. The power supply system comprises a reserve type high voltage DC power supply and the frame power supply, the input end of the reserve type high voltage DC power supply is high voltage AC input, the output end is high voltage DC output of a storage battery group, the reserve type high voltage DC power supply comprises rectification equipment and is used for charging storage batteries. The frame power supply comprises a first module for converting high voltage AC input into low voltage DC output, a second module for converting high voltage DC input into low voltage DC output, output ends of the first module and the second module are connected in parallel and output through a low voltage DC bus, and used for supplying a plurality of electronic equipment; and a controlling and switching device for controlling and switching the first and second modules, and when the high voltage AC is normal, the plurality of electronic equipment are supplied by the first module, and supplied by the second module when high voltage AC is cut off. Compared with the prior art, the power supply is high in efficiency, high in reliability and small in investments.

Description

A power supply system for supplying power to electronic equipment and a rack power supply

technical field

The utility model relates to the field of power supply, in particular to a power supply technology for electronic equipment. the

Background technique

Existing data center servers are generally powered by UPS systems. Data center servers are generally 1U or 2U in structure. Each server is equipped with a power module with AC 220V or DC 48V input. The power module can be configured according to N, N+1 or 2N. Corresponding to the server power input, the front of the server is equipped with UPS power supply equipment or 48V high-frequency switching power supply equipment. the

In recent years, in order to improve the reliability and power conversion efficiency of the server power supply system, a high-voltage DC power supply system that replaces UPS or 48V DC power supply with high-voltage DC power supply (such as DC240V) has appeared in China; , At the same time, a new decentralized power supply system that installs the storage battery on the server side. the

The existing power supply system architecture of data center servers can be mainly divided into the following four types:

(1) Online UPS power supply system;

This system is the most widely used in existing data centers. Its core equipment is double-conversion online UPS power supply. In order to reduce costs, UPS systems usually use centralized power supply. Its characteristics include:

① System structure: The UPS power supply is composed of a rectifier, an inverter, a control circuit and a bypass circuit, and the battery is connected to the DC bus between the rectifier and the inverter. In order to improve the reliability of a stand-alone unit, UPSs usually form an N+1 parallel redundancy mode. the

②Operation mode: In normal times, the AC mains is rectified and inverted to supply power to the load. After the mains power failure, the battery supplies power through the inverter. After the inverter fails, the mains supplies power through the bypass. the

③Advantages and disadvantages: The advantage of this system is that it can filter out problems such as peak pulses and overvoltages of the mains power supply, and at the same time ensure that the switching time between the mains power supply and the battery power supply is zero; due to the complex structure of the UPS, and the power supply has undergone two transformations at the same time, so Its disadvantage is low reliability and large loss (generally between 8% and 25%). the

(2) Online 48V DC power supply system;

The online 48V DC power supply mode has long been maturely used in the communication industry. Since the power consumption of data equipment is much larger than that of traditional communication equipment, decentralized power supply methods are generally used in data centers. Features of the system include:

①System structure: Compared with UPS, it cancels the inverter, and the battery is directly connected to the output terminal of the rectifier. In order to improve reliability, the rectifier modules are usually connected in parallel; the server uses 48V DC input power. the

②Operation mode: In normal times, the AC mains is rectified by the DC power supply to provide DC power for the load, and the battery supplies power after the mains power failure. the

③ Advantages and disadvantages: Its advantage is that the system is mature and reliable; its disadvantages are that the system voltage is low, the transmission distance is limited, and the transmission loss is large. the

(3) On-line high-voltage direct current (such as DC240V) power supply system;

The system is still in the experimental stage and has not been applied on a large scale in the data center. Its features include:

①System structure: The power supply structure is the same as the centralized online high-voltage DC power supply equipment; the server adopts the traditional AC 220V input power supply, which is compatible with DC input within a certain voltage range. the

②Operation mode: In normal times, the AC mains is rectified to provide DC power for the load, and the battery supplies power after the mains power failure. the

③Advantages and disadvantages: Its advantage is that it has improved reliability and efficiency compared with the UPS system; its disadvantages are greater loss than the backup low-voltage DC power supply system, and the configuration capacity of power equipment is large. the

(4) Back-up low-voltage direct current (DC48V or DC12V) power supply system. the

The system currently mainly includes the power supply scheme used by Google and the power supply scheme used by Facebook, wherein Google's power supply scheme adopts DC12V voltage (referred to as "DC12V scheme"), and Facebook's scheme adopts DC48V voltage (abbreviated as "DC48V scheme"). Features of the system include:

①System structure: The system disperses the power supply equipment to the data room, in which the DC12V scheme configures 12V batteries to each server, and no other power supply equipment is installed at the front end; in the DC48V scheme, each server power supply has two inputs, one is AC Mains input, the second is DC 48V input, the front end of the server is equipped with a battery rack, and one battery rack (including charging rectifier) is used as a backup power supply for 6 server racks. the

②Operation mode: In normal times, the AC mains power directly enters the power supply of IT equipment. After the mains power failure, it is switched to 12V or 48V battery power supply. the

③Advantages and disadvantages: Its advantage is high system operation efficiency; its disadvantage is that the battery pack is scattered to the computer room, which improves the environmental requirements of the computer room. the

At present, most servers in data centers are powered by online UPS systems. The mains power is rectified and inverted twice, and the loss generally reaches 10%-15%. In addition, due to structural constraints, the reliability of UPS system power supply is low. Although redundancy (such as 2N) can improve reliability, it also increases the investment and loss of power equipment. the

In recent years, the industry has begun to try online high-voltage DC power supply. This system reduces the inverter link, can reduce losses by about 5%, and also greatly improves the reliability of power supply. the

The solution of decentralized backup low-voltage DC power supply abroad has the outstanding advantage of greatly improving the overall efficiency of the system. In this system, the power supply equipment and batteries are distributed and installed in the data room. The main problem is that the battery and the server have different requirements on the environment, especially the lead-acid battery is greatly affected by the environment. Under the circumstances, the installation of lead-acid batteries and servers in the same computer room limits this development trend, so this solution is more suitable for lithium batteries that have lower environmental temperature requirements but higher costs. the

To sum up, in the existing power supply architecture of data center servers, the UPS power supply scheme has low reliability and large loss; the 48V DC power supply scheme has short transmission distance and large transmission loss; the high-voltage DC scheme has moderate reliability and loss; the backup low-voltage The DC power supply scheme has the highest efficiency among the existing schemes, but it has higher requirements on the equipment room environment. the

Utility model content

The purpose of the utility model is to provide an efficient and reliable power supply system for electronic equipment and a corresponding rack power supply. the

According to one aspect of the present invention, a system for power supply of electronic equipment is provided, including a backup high-voltage DC power supply, and a rack power supply, characterized in that:

The input end of the backup high-voltage DC power supply is a high-voltage AC power supply, including:

Rectification equipment, used to convert high-voltage AC input into high-voltage DC output, and its output terminal is connected in parallel with the high-voltage DC output of the battery pack;

The rack power supply includes:

The first module that converts high-voltage AC input into low-voltage DC output;

The second module that converts the high-voltage direct current input from the backup high-voltage direct current power supply into low-voltage direct current output, the output terminals of the first and second modules are connected in parallel and output through a low-voltage direct current bus to supply power for multiple electronic devices ;

The control switching device is used to control and switch the first and second modules, so as to ensure that when the high-voltage alternating current is normal, the plurality of electronic devices are powered by the first-type modules, and when the high-voltage alternating current is interrupted, the The second module supplies power. the

According to another aspect of the utility model, there is also provided a rack power supply for supplying power to multiple electronic devices, which is characterized in that it includes:

The first module that converts high-voltage AC input into low-voltage DC output;

A second module that converts high-voltage DC input into low-voltage DC output. The output terminals of the first and second modules are connected in parallel and output through a low-voltage DC bus to supply power for multiple electronic devices;

The control switching device is used to control and switch the first and second modules to ensure that when the AC mains is normal, the multiple electronic devices are powered by the first module, and when the AC mains is interrupted, the second module powered by. the

Compared with the prior art, the utility model has the beneficial effects of high efficiency, high reliability and small investment. The utility model has the advantages of:

①The high-voltage DC power supply capacity only needs to be charged by the battery pack, which saves equipment costs and reduces the loss of this part compared with the system with high-voltage DC as the main use;

②The increase of DC voltage increases the power supply distance, and the battery pack can be arranged in a separate battery room, and the air conditioning can be performed separately, which can save the overall air conditioning energy consumption of the data center;

③Compared with the scheme in which batteries are distributed to each server, the original scheme increases the complexity of maintenance and causes waste of equipment due to the different service life of servers and batteries, while this scheme centralizes the arrangement of battery packs to facilitate equipment maintenance And improve the utilization rate of equipment, reduce the cost of equipment procurement. the

Description of drawings

Other features, purposes and advantages of the present utility model will become more apparent by reading the detailed description of the non-limiting embodiment made with reference to the following drawings:

Fig. 1 shows a schematic diagram of a system for powering electronic equipment according to one aspect of the present invention. the

Fig. 2 shows a schematic diagram of a system for supplying power to multiple servers according to a specific example of the present invention. the

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail. the

FIG. 1 shows an efficient and reliable power supply system architecture for electronic equipment in a data center according to one aspect of the present invention. As shown in FIG. 1 , the high-voltage DC power supply 1 and the storage battery pack 4 are centrally placed in the power battery room, and the rack power module 5 and multiple electronic devices are centrally placed in the machine room. Among them, the rack power supply module 5 supplies power for multiple electronic devices 9 (E1, E2, ...). When the AC high voltage is normal, it is directly powered by the AC high voltage. When the AC high voltage is interrupted, it is replaced by the battery pack 4 Standby power supply. Electronic devices include but are not limited to servers, computers, routers, laptops, etc. the

The preferred embodiment of the utility model adopts the scheme of sharing the power supply, which absorbs the advantages of the existing centralized and backup power supplies at the same time. The battery packs are centrally arranged in the battery room, while multiple electronic devices are centrally placed in the data room. Since the battery packs and electronic devices have different environmental requirements, the electronic devices and the battery packs are placed separately, which reduces the complexity of maintenance and Cost savings. the

Specifically, as shown in Figure 1, the power supply system can be divided into two parts: a backup high-voltage DC power supply 1 located at the front of the electronic equipment, and a rack power supply 5 for providing power to the electronic equipment. Among them, the front ends of multiple electronic devices 9 have high-voltage AC power supply and high-voltage DC power supply, and the high-voltage DC power supply can be realized in various ways, including but not limited to:

1) Provided in the form of battery pack 4, or;

2) Convert high-voltage alternating current into high-voltage direct current through rectification. the

The rack power supply 5 is used to supply power to multiple electronic equipment 9 (E1, E2, ...), which includes two types of modules: high-voltage AC input and high-voltage DC input, and each electronic equipment 9 shares the low-voltage DC of the rack power supply. output. the

The input terminal of the backup high-voltage DC power supply 1 is a high-voltage AC input, and the output terminal is a high-voltage DC output, which includes:

The rectifier 2 is used to convert the high-voltage AC input into a high-voltage DC output, and its output terminal is connected in parallel with the high-voltage DC output of the battery pack 4;

The rack power supply 5 includes: a first module 6 for converting a high-voltage AC input into a low-voltage DC output; a second module 7 for converting a high-voltage DC input from a backup high-voltage DC power supply 1 into a low-voltage DC output, wherein the The output terminals of the first module 6 and the second module 7 are connected in parallel and output through a low-voltage DC bus to supply power for multiple electronic devices 9;

The rack power supply 5 also includes a control switching device 8, which is used to control and switch the first module 6 and the second module 7, so as to ensure that when the high-voltage alternating current is normal, the plurality of electronic devices 9 are powered by the first module 6 , after the high-voltage alternating current is interrupted, it is powered by the second module 7 . the

In a preferred embodiment, the rectifying device 2 is also used to charge the battery pack. When the high-voltage alternating current is normal, the rectifying module 2 only performs floating charging for the battery pack; when the high-voltage alternating current fails, the battery pack passes through the The second module 7 supplies power for the plurality of electronic devices 9; after the high-voltage alternating current is powered on, the control switching device 8 switches the first module 6 and the second module 7, and switches to be powered by the first module 6, and the Multiple electronic devices 9 are powered by the first module 6 instead, and the rectifying device 2 performs balanced charging for the storage battery pack 4, and turns to the floating charge state after full. the

here:

"Float charge" refers to a continuous, long-term constant voltage charging method. The system can provide a constant voltage slightly higher than the battery terminal voltage, which is enough to compensate for the self-discharge loss of the battery and can quickly restore the battery to nearly fully charged state. the

"Balanced charging" means that during the use of the battery, the battery terminal voltage is unbalanced due to individual differences in the battery, temperature differences, etc. Perform activation charging. the

In another preferred embodiment, in the rack power supply 5 , the control switching device 8 may be directly connected to the first module 6 or directly connected to the second module 7 . The output of the first module 6 or the second module 7 is connected in parallel with the output end of the corresponding other module through the control switching device 8 , outputted through a low-voltage DC bus, and supplies power to multiple electronic devices 9 at the same time. the

In another preferred embodiment, the backup high-voltage direct current power supply 1 further includes a monitoring module 3 for battery management and insulation monitoring, which mainly completes functions such as measurement, alarm, communication, and battery management. the

In another preferred embodiment, the rectifier module 2 can adopt a modular hot-swappable method, and its capacity only needs to meet the charging of the battery pack 4 . the

In another preferred embodiment, the rack power supply 5 is installed in the data room, and the battery pack is installed in the battery room. the

In another preferred embodiment, the range of high-voltage AC includes but not limited to AC110V-AC400V, the range of high-voltage DC includes but not limited to DC110V-DC400V, and the range of low-voltage DC includes but not limited to DC12V-DC110V. the

Fig. 2 shows another specific embodiment according to this aspect. This implementation is a power supply system that supplies power to a plurality of servers 9 (1, 2, . . . N). The system can be divided into two parts: a backup high-voltage DC power supply 1 located at the front of the server, and a rack power supply 5 for providing power to multiple servers 9 (1, 2, . . . N). Among them, the front ends of multiple servers 9 (1, 2, ... N) have high-voltage alternating current AC220V input and high-voltage direct current input, wherein the high-voltage direct current is provided in the form of battery packs and/or the high-voltage alternating current AC380V is converted by the rectifier module 2 Provided for the formation of high-voltage direct current. Multiple servers are powered by the rack power supply 5, which can be divided into two types of modules with high-voltage AC input and high-voltage DC input. Each server shares the 12V low-voltage DC output of the rack-level power supply. The rack power supply can be installed in the data room, and the battery pack can be installed centrally in the battery room. the

Specifically, the input end of the backup high-voltage direct current power supply is a high-voltage alternating current AC380V input, and the output end is a high-voltage direct current output, which includes:

Rectifier 2, used to convert high-voltage AC AC380V input into high-voltage DC output, and its output terminal is connected in parallel with the high-voltage DC output of the battery pack;

The rack power supply includes: a class A module 6 for converting high voltage AC220V input into 12V low voltage DC output; a class B module 7 for converting high voltage DC input from a backup high voltage DC power supply into 12V low voltage DC output, said A The output terminals of the class module 6 and the class B module 7 are connected in parallel and output through a 12V low-voltage DC bus to supply power for multiple servers 9 (1, 2, ... N);

The rack power supply 5 also includes a control switching module 8 for controlling and switching the type A module 6 and the type B module 7 . The control switching module 8 can be specifically a diode, which is connected to the class B power module 7. When the high-voltage alternating current AC220V is normal, the diode and the class B power module 7 are turned on and off. (1, 2, ... N) power supply; when the high-voltage alternating current AC220V is interrupted, the diode and the B-type power supply module 7 are turned on, and the B-type module 7 is used for multiple servers 9 (1, 2, ... N) )powered by. the

In another preferred embodiment, the rectifier module 2 is also used to charge the battery pack 4. When the high-voltage alternating current AC380V is normal, the rectifier module 2 only performs floating charging for the battery pack 4; when the high-voltage alternating current AC380V is powered off, the battery pack 4 A plurality of servers 9 (1, 2, ... N) are powered by the B-type module 7; after the high-voltage alternating current is powered on, the control switching module switches the A-type module 6 and the B-type module 7, and the multiple servers 9 (1, 2, ...N) The power supply is changed to the class A module 6, and the rectification module 2 carries out equalized charging for the storage battery pack 4, and turns to the floating charging state after being fully charged. the

In another preferred embodiment, the backup high-voltage DC power supply 1 may also include a monitoring module 3 for battery management and insulation monitoring, mainly to complete functions such as measurement, alarm, communication, and battery management. the

In another preferred embodiment, the rectifier module 2 can also adopt a modular hot-swappable method, and its capacity only needs to meet the charging requirements of the battery pack. the

For those skilled in the art, it is obvious that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to fall within the scope of the claims All changes within the meaning and range of equivalents to the requirements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned. In addition, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. A plurality of units or means stated in the device claims may also be realized by one unit or device through software or hardware. The words first, second, etc. are used to denote names and do not imply any particular order. the

Claims (9)

1. A power supply system for supplying power to electronic equipment, comprising a backup high-voltage DC power supply, and a rack power supply, wherein: The input end of the backup high-voltage DC power supply is a high-voltage AC power supply, including: Rectification equipment, used to convert high-voltage AC input into high-voltage DC output, and its output terminal is connected in parallel with the high-voltage DC output of the battery pack; The rack power supply includes: The first module that converts high-voltage AC input into low-voltage DC output; The second module that converts the high-voltage DC input from the backup high-voltage DC power supply into low-voltage DC output, the output terminals of the first and second modules are connected in parallel and output through a low-voltage DC bus, which is used for multiple electronic equipment power supply; The control switching device is used to control and switch the first and second modules, to ensure that when the high-voltage alternating current is normal, the plurality of electronic devices are powered by the first-type modules, and when the high-voltage alternating current is interrupted, the The second module supplies power. 2. The power supply system according to claim 1, wherein the rectifying device is also used for charging the storage battery pack, and when the high-voltage alternating current is normal, the rectifying device only performs floating charging for the storage battery pack; after the high-voltage alternating current power failure, The battery pack supplies power to the plurality of electronic devices through the second module; after the high-voltage alternating current is supplied, the control switching device switches the first and second modules, and the plurality of electronic devices are replaced by the first module power supply, and the rectifier equipment carries out equalized charging for the storage battery pack, and turns to the floating charging state after being fully charged. 3. The power supply system according to claim 1 or 2, wherein the backup high voltage direct current power supply further comprises: a monitoring module for battery management and insulation monitoring. 4. The power supply system according to claim 1 or 2, wherein the rectifier adopts a modular hot-swappable method, and its capacity is sufficient to charge the battery pack. the 5. The power supply system according to claim 1, wherein the rack power supply is installed in the data room, and the battery pack is installed in the battery room collectively. 6. The power supply system according to claim 1, wherein the high-voltage alternating current is AC110V-AC400V, the high-voltage direct current is DC110V-DC400V, and the low-voltage direct current is DC12V-DC110V. 7. A rack power supply for powering electronic equipment, comprising: The first module that converts high-voltage AC input into low-voltage DC output; A second module that converts high-voltage DC input into low-voltage DC output, the output ends of the first and second modules are connected in parallel, and output through a low-voltage DC bus to supply power to multiple electronic devices; The control switch device is used to control and switch the first and second modules to ensure that when the high-voltage alternating current is normal, the plurality of electronic devices are powered by the first module, and when the AC mains is interrupted, the power is supplied by the second module . 8. The rack power supply according to claim 7, wherein the rack power supply is installed in a data room. 9. The rack power supply according to claim 7, wherein the high-voltage alternating current is AC110V-AC400V, the high-voltage direct current is DC110V-DC400V, and the low-voltage direct current is DC12V-DC110V. the

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