Power supply system and data center

Abstract

The utility model provides a kind of power supply system and data center, the power supply system includes: direct current conversion module and energy storage module;The energy storage module includes energy storage battery unit;The energy storage battery unit includes N battery pack connected in parallel, and the battery pack includes multiple series and / or parallel battery;Wherein, N is less than or equal to 6 positive integer;The power supply end of the energy storage battery unit is connected with the direct current end of the direct current conversion module;The direct current conversion module is used to convert first alternating current signal into first direct current signal;The first direct current signal is used to power supply load device;The energy storage module is used to output the first direct current signal.The above-mentioned energy storage battery unit limits the group number of parallel battery pack, not only can provide sufficient time of electric signal for load device when main power is powered off, but also can avoid the problem of uneven current of battery, guarantee backup battery to play power supply guarantee efficiency.

Description

Technical Field

[0001] This utility model relates to the field of uninterruptible power supply technology, and in particular to a power supply system and a data center. Background Technology

[0002] With the deepening development of the digital economy and the continuous expansion of Internet application scenarios, higher demands are being placed on the computing power of data center servers, which in turn is driving a rapid growth in the demand for data center rack load power.

[0003] With the significant increase in the power of load devices, more stringent technical requirements have been placed on the backup power capacity of power supply systems. In current engineering practice, to meet the continuous power supply needs of high-power load devices, a configuration of multiple battery banks connected in parallel is typically adopted. However, this approach faces the problem of insufficient current sharing among the parallel battery banks. Due to the unsatisfactory current sharing of the parallel battery banks, the charging and discharging current distribution of each individual battery is uneven, leading to overcharging or over-discharging of some batteries. Ultimately, this significantly affects the reliability and stability of the entire backup power system, making it difficult to fully realize its intended power supply guarantee performance. Utility Model Content

[0004] This utility model provides a power supply system and a data center to solve the problem that existing power supply systems cannot meet the high power requirements of load devices.

[0005] In a first aspect, this utility model provides a power supply system, including: a DC-DC conversion module and an energy storage module; the energy storage module includes an energy storage battery unit; the energy storage battery unit includes N battery packs connected in parallel, and the battery packs include multiple batteries connected in series and / or in parallel; wherein, N is a positive integer less than or equal to 6; the power supply terminal of the energy storage battery unit is connected to the DC terminal of the DC-DC conversion module;

[0006] The DC-DC conversion module is used to convert a first AC signal into a first DC signal; the first DC signal is used to power the load device.

[0007] The energy storage module is used to output the first DC signal.

[0008] In one possible implementation, the voltage of the battery pack is greater than 400V.

[0009] In one possible implementation, the battery pack has a voltage of 750V; and each battery pack includes 4 to 6 groups of batteries connected in parallel.

[0010] In one possible implementation, N=4.

[0011] In one possible implementation, the energy storage module further includes an energy storage conversion unit, which includes a first DC / DC circuit for converting the output electrical signal of the energy storage battery unit into a first DC electrical signal.

[0012] In one possible implementation, the DC-DC conversion module includes a rectifier unit and a converter unit;

[0013] The rectifier unit is used to convert the first AC signal into a third DC signal;

[0014] The converter unit is used to convert the third DC signal into the first DC signal.

[0015] In one possible implementation, the converter unit includes a second DC / DC circuit.

[0016] In one possible implementation, the power supply system further includes a DC row head unit;

[0017] The DC header cabinet is used to distribute the first DC signal to each DC load device.

[0018] In one possible implementation, the power supply system further includes a low-voltage inverter module;

[0019] The low-voltage inverter module is used to convert the first DC signal into a low-voltage AC signal and transmit it to the AC load device.

[0020] Secondly, embodiments of this application provide a data center, including the power supply system described in the first aspect above.

[0021] This utility model provides a power supply system and a data center. The power supply system includes a DC-DC conversion module and an energy storage module. The energy storage module includes an energy storage battery unit. The energy storage battery unit includes N battery packs connected in parallel, and each battery pack includes multiple batteries connected in series and / or in parallel. N is a positive integer less than or equal to 6. The power supply terminal of the energy storage battery unit is connected to the DC terminal of the DC-DC conversion module. The DC-DC conversion module converts a first AC signal into a first DC signal. The first DC signal is used to power the load device. The energy storage module outputs the first DC signal. The aforementioned energy storage battery unit limits the number of parallel battery packs, enabling it to provide a sufficient electrical signal to the load device for a sufficient time when the main power supply fails. It also reduces the battery current imbalance to below the standard current imbalance, avoiding the problem of uneven battery current and ensuring the power supply system performs its power guarantee function. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other [implementations] can be obtained based on these drawings without creative effort.

[0023] The attached diagram.

[0024] Figure 1 This is a schematic diagram of the power supply system provided in an embodiment of the present utility model;

[0025] Figure 2 This is a schematic diagram of the specific structure of the power supply system provided in this embodiment of the utility model. Detailed Implementation

[0026] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the following description will be provided in conjunction with the accompanying drawings and specific embodiments.

[0028] Figure 1 This is a schematic diagram of the power supply system provided in an embodiment of the present utility model. Figure 1 As shown, the power supply system includes: a DC-DC conversion module and an energy storage module; the energy storage module includes an energy storage battery unit; the energy storage battery unit includes N battery packs connected in parallel, and the battery pack includes multiple batteries connected in series and / or in parallel; wherein, N is a positive integer less than or equal to 6; the power supply terminal of the energy storage battery unit is connected to the DC terminal of the DC-DC conversion module.

[0029] The DC-DC conversion module is used to convert a first AC signal into a first DC signal; the first DC signal is used to power the load device.

[0030] The energy storage module is used to output the first DC signal.

[0031] In this embodiment, the DC-DC converter module 10 is used to rectify and regulate the voltage of an externally input AC signal. The externally input AC signal can be a grid signal greater than 750V, such as a 10kV or 1.2kV AC signal, or a 380V AC signal. When the AC signal input to the DC-DC converter module 10 is a 10kV high-voltage first AC signal, the DC-DC converter module 10 can first step down the first AC signal and then rectify it to obtain a first DC signal. The first DC signal can be a DC signal less than 400V. Specifically, the DC-DC converter module 10 may include a phase-shifting transformer or a power electronic transformer (PET).

[0032] Specifically, when the mains power supply is normal, the DC-DC converter 10 directly converts the first AC signal into a first DC signal for the load; at the same time, the energy storage module 20 charges the battery in the energy storage battery unit 22. When the mains power is interrupted, the energy storage module 20 switches to discharge mode and outputs the first DC signal to ensure the continuous operation of the load equipment.

[0033] Since the existing energy storage module 20 has a small battery capacity, it cannot meet the long-term power demand of high-power equipment. Therefore, the energy storage battery unit 22 in this embodiment includes multiple battery packs, which are connected in parallel. Each battery pack may include multiple batteries connected in series and / or in parallel. Series connection of multiple batteries can increase the output voltage, and parallel connection of multiple batteries can increase the output current of the energy storage battery unit to meet the long-term backup power demand of high-power equipment in the computer room. At the same time, by limiting the number of parallel battery packs to no more than 6, the uneven current of the energy storage battery unit can be guaranteed to meet the relevant requirements without adding any additional current sharing circuit, thus ensuring that the energy storage module can perform its power supply guarantee function.

[0034] Furthermore, the power supply system also includes a main controller for controlling the operation of the DC-DC conversion module 10 and the energy storage module 20. Each battery pack is equipped with a corresponding BMS (Battery Management System) module, which interacts with the main controller of the power supply system via a CAN bus or RS485 communication protocol.

[0035] In one possible implementation, the energy storage battery unit includes N battery packs connected in parallel; and each battery pack includes multiple batteries connected in series.

[0036] In this embodiment, each battery pack has the same number and specifications of batteries connected in series to ensure that the output voltage and capacity of each battery pack are consistent. Connecting individual batteries in series can increase the output voltage. For example, if each individual battery is an 850W / 12V high-rate battery, and each battery pack has 56 individual batteries connected in series, a battery pack with an output voltage of 750V can be obtained. Multiple battery packs with the same output voltage are then connected in parallel, for example, four battery packs in parallel, which can share the load current, reduce the uneven current between batteries, and reduce the impact of single module failure on the system.

[0037] Specifically, the aforementioned individual battery cells can be lead-acid batteries.

[0038] In one possible implementation, N=4.

[0039] In this embodiment, in order to ensure that the uneven flow rate among the parallel battery packs does not exceed the corresponding standard, this embodiment has determined through experiments that the maximum number of parallel battery packs is 4 when the corresponding standard for uneven flow rate is met.

[0040] The aforementioned power supply system clarifies the number of battery packs connected in parallel within the energy storage battery unit, determines the maximum number of parallel batteries in the energy storage battery unit to meet the current sharing standard, and improves the current sharing effect of the energy storage battery unit.

[0041] In one possible implementation, the voltage of the battery pack is greater than 400V.

[0042] In this embodiment, the voltage of each battery pack can be increased by connecting multiple batteries in series, thereby meeting the backup power requirements of high-power load equipment in the computer room. The voltage of each battery pack can be 400V~1000V, specifically 600V, 800V, etc.

[0043] As can be seen from the above embodiments, the battery energy storage unit provided in this embodiment can output a high-voltage DC signal and send the output DC signal to the output terminal of the DC-DC conversion module. At this time, between the DC-DC conversion module and the load device, a step-down conversion module can also be used to convert the high-voltage DC signal into a voltage level acceptable to the load device. This step-down conversion module can be a step-down DC / DC circuit.

[0044] In one possible implementation, the battery pack has a voltage of 750V; and each battery pack includes 4 to 6 groups of batteries connected in parallel.

[0045] Specifically, each battery pack includes multiple individual cells connected in parallel, thereby increasing the output current of the battery pack and ensuring that the current sharing of each battery pack meets the requirements. After the individual cells are connected in parallel, all battery packs are then connected in parallel to further increase the output current of the battery pack. By connecting in parallel, the battery energy storage unit can meet the uneven current sharing requirements while expanding the battery capacity, thus meeting the long-term backup power needs of high-power load equipment in the current data center.

[0046] In one possible implementation, Figure 2 A schematic diagram of the specific structure of the power supply system provided in this embodiment is shown. See also: Figure 2 The energy storage module further includes an energy storage conversion unit 21, which includes a first DC / DC circuit for converting the output electrical signal of the energy storage battery unit into a first DC electrical signal.

[0047] In this embodiment, the first DC / DC circuit can be a step-down DC / DC circuit or a bidirectional DC / DC circuit.

[0048] Specifically, the first DC signal output by the DC-DC converter module is typically a low-voltage signal acceptable to the load device. To match the first DC signal output by the DC-DC converter module 10, this embodiment includes a first DC / DC circuit at the output of the energy storage battery unit 22. This first DC / DC circuit converts the voltage output by the energy storage battery unit 22 into the first DC signal. Furthermore, to meet the backup power requirements of various high-power devices in the data center, this embodiment connects multiple batteries in series within the energy storage battery unit 22. This not only expands the battery capacity of the energy storage battery unit 22 but also increases its output voltage. Therefore, the output voltage of the energy storage battery unit 22 is typically high. To match the load requirements, the first DC / DC circuit in this embodiment is a step-down DC / DC circuit to reduce the higher voltage signal output by the energy storage battery unit to the first DC signal. This not only meets the power requirements of the load but also extends the backup power time of the energy storage battery unit 22.

[0049] In one possible implementation, the voltage of the battery pack's output electrical signal is 750V, and the first DC signal is 240V.

[0050] In one embodiment, the DC-DC conversion module 10 includes a high-voltage transformer, a rectifier module, and a low-voltage conversion module;

[0051] The high-voltage transformer converts the high-voltage AC signal input to the power supply system into a low-voltage AC signal. This low-voltage AC signal is then transmitted to a rectifier module, which converts it into a third DC signal; for example, the high-voltage AC signal is 10kV, and the low-voltage AC signal is 380V. Finally, an LLC resonant converter is used as the low-voltage conversion module to reduce the third DC signal to 240V.

[0052] In one possible implementation, refer to Figure 2 The DC-DC conversion module 10 includes a rectifier unit 11 and a converter unit;

[0053] The rectifier unit 11 is used to convert the first AC signal into a third DC signal;

[0054] The converter unit is used to convert the third DC signal into the first DC signal.

[0055] In this embodiment, the rectifier unit 11 can be a three-phase bridge fully controlled rectifier circuit, which includes 6 thyristors to convert the first AC signal into a smooth third DC signal.

[0056] In one possible implementation, the converter unit includes a second DC / DC circuit 12.

[0057] In one possible implementation, the converter unit can adjust the voltage of the third DC signal to obtain the first DC signal.

[0058] In one possible implementation, refer to Figure 2 The second DC / DC circuit 12 is an adjustable step-down DC-DC circuit.

[0059] Specifically, the rectifier unit 11 converts the external high-voltage AC power into a third DC power signal. Usually, the voltage of the third DC power signal is still higher than the load voltage, so the converter unit steps down the third DC power signal into a first DC power signal.

[0060] Specifically, as data center architecture continues to evolve, the power of rack loads is also constantly increasing. If the DC-DC converter module 10 only outputs a fixed voltage signal, the current carrying capacity of high-power racks will exceed their current-carrying capacity when the power of data center racks increases rapidly. This application configures the second DC / DC circuit 12 as an adjustable step-down DC / DC circuit, thereby using a larger voltage to power the rack load when its power increases, thus limiting its current carrying capacity within its range. Furthermore, a larger current can lead to increased load heating and potential safety hazards. Therefore, this embodiment, by adjusting the output voltage of the DC-DC converter module 10, can limit the current carrying capacity of the rack load to a conventional range, such as 60-80A.

[0061] In one possible implementation, see Figure 2 The power supply system also includes a DC power supply unit 60;

[0062] The DC header cabinet 60 is used to distribute the first DC signal to each DC load device.

[0063] Specifically, the DC power distribution unit 60 is a power distribution device specifically designed for distributing and managing DC power, providing safe and reliable power distribution and protection for DC load devices in data centers.

[0064] The DC power distribution unit 60 includes input terminals, a power distribution unit, and a monitoring system. The input terminals receive low-voltage DC signals. The power distribution unit distributes the DC power to multiple branches, each independently controlled, and each branch is used to connect to the corresponding DC loads in the data center. The power distribution unit also includes circuit breakers for overload and short-circuit protection of the output circuits, ensuring equipment safety. The monitoring system monitors parameters such as voltage, current, and power at the input and output terminals in real time and can communicate with the main controller to achieve remote management of the DC power distribution unit 60.

[0065] As can be seen from the above embodiments, the DC conversion module 10, energy storage module 20, and DC power supply cabinet 60 in this embodiment constitute the DC power supply branch for DC equipment in the data center. The structure of the above DC power supply branch is simple and does not require multi-stage conversion. It is understandable that when there are many high-power devices in the data center, multiple DC power supply branches can be set up in the power supply system.

[0066] In one possible implementation, refer to Figure 2 The power supply system also includes a low-voltage inverter module 40;

[0067] The low-voltage inverter module 40 is used to convert the first DC signal into a low-voltage AC signal and transmit it to the AC load device.

[0068] Specifically, since data centers include not only DC load devices such as servers and network equipment, but also AC load devices, such as server power supply units, network equipment such as switches and routers, and auxiliary equipment such as storage devices, air conditioning units, and lighting, this application includes a low-voltage inverter module 40 in the power supply system to convert low-voltage DC signals into low-voltage AC signals to power the AC load devices in the data center.

[0069] In this embodiment, the low-voltage inverter module 40 can be a three-phase voltage source inverter.

[0070] In one possible implementation, refer to Figure 2 The power supply system also includes an AC power supply unit 50;

[0071] The AC header cabinet 50 is used to distribute the low-voltage AC signal to each AC load device.

[0072] Specifically, the AC power distribution unit 50 is the terminal power distribution equipment of the AC power supply branch in the power supply system. It distributes the low-voltage AC power signal output by the low-voltage inverter module 40 to each AC load device through a multi-way switch.

[0073] Secondly, embodiments of this application provide a data center, including the power supply system described in the first aspect above.

[0074] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A power supply system, characterized in that, include: A DC-DC converter module and an energy storage module; the energy storage module includes an energy storage battery unit; the energy storage battery unit includes N battery packs connected in parallel, and the battery packs include multiple batteries connected in series and / or in parallel; wherein, N is a positive integer less than or equal to 6; the power supply terminal of the energy storage battery unit is connected to the DC terminal of the DC-DC converter module. The DC-DC conversion module is used to convert a first AC signal into a first DC signal; the first DC signal is used to power the load device. The energy storage module is used to output the first DC signal.

2. The power supply system according to claim 1, characterized in that, The voltage of the battery pack is greater than 400V.

3. The power supply system according to claim 2, characterized in that, The battery pack has a voltage of 750V; and each battery pack includes 4 to 6 groups of batteries connected in parallel.

4. The power supply system according to any one of claims 1 to 3, characterized in that, N＝4。 5. The power supply system according to claim 1, characterized in that, The energy storage module further includes an energy storage conversion unit, which includes a first DC / DC circuit for converting the output electrical signal of the energy storage battery unit into the first DC electrical signal.

6. The power supply system according to claim 1, characterized in that, The DC-DC conversion module includes a rectifier unit and a converter unit; The rectifier unit is used to convert the first AC signal into a third DC signal; The converter unit is used to convert the third DC signal into the first DC signal.

7. The power supply system according to claim 6, characterized in that, The converter unit includes a second DC / DC circuit.

8. The power supply system according to claim 1, characterized in that, The power supply system also includes a DC power supply unit; The DC header cabinet is used to distribute the first DC signal to each DC load device.

9. The power supply system according to claim 1, characterized in that, The power supply system also includes a low-voltage inverter module; The low-voltage inverter module is used to convert the first DC signal into a low-voltage AC signal and transmit it to the AC load device.

10. A data center, characterized in that, Includes the power supply system as described in any one of claims 1 to 9.

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