Power supply device and data center

Abstract

The present disclosure provides a power supply device and a data center, relates to the field of power supply, and particularly relates to a power supply device and a data center for cloud computing, cloud storage, big data, deep learning and image processing and the like. The power supply device comprises: a power supply module comprising at least one battery pack; a current conversion module comprising an alternating current input end and a direct current output end; and a power supply distribution module comprising a power supply connection branch, a load connection branch and a battery pack connection branch, wherein the power supply input end of the power supply connection branch is connected to the direct current output end, the load connection branch is connected between the power supply output end of the power supply connection branch and each load, and the battery pack connection branch is connected between the power supply output end and each battery pack. According to the power supply device of the present disclosure, the structure is more simple and compact, the volume and occupied space of the power supply device can be reduced, and the versatility of the power supply device is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of power supply, and particularly relates to a power supply device and a data center for cloud computing, cloud storage, big data, deep learning and image processing. BACKGROUND

[0002] A data center is a core area of information integration, and usually carries important IT loads such as storage and computing, and needs sufficient power supply guarantee. The data center is usually configured with a diesel generator set as a backup power supply to provide continuous power supply for the IT load in the case of abnormal mains power supply.

[0003] In the related art, the data center usually needs to be configured with an uninterruptible power supply system to ensure the power supply continuity within the switching time from the abnormal mains power supply to the start of the diesel generator set. However, the structure of the uninterruptible power supply is usually complex, and has a large floor area and poor versatility. SUMMARY

[0004] The present disclosure provides a power supply device and a data center.

[0005] According to an aspect of the present disclosure, a power supply device is provided, comprising: a power supply module comprising at least one battery pack; a current conversion module, the current conversion module comprising an alternating current input end and a direct current output end; a power supply distribution module comprising a power supply connection branch, a load connection branch and a battery pack connection branch, the power supply input end of the power supply connection branch being connected to the direct current output end, the load connection branch being connected between the power supply output end of the power supply connection branch and each load, and the battery pack connection branch being connected between the power supply output end and each battery pack.

[0006] According to another aspect of the present disclosure, a data center is provided, comprising the power supply device according to the first aspect of the present disclosure.

[0007] According to the technical solution of the present disclosure, the structure of the power supply device is more simple and compact, which can reduce the volume and occupied space of the power supply device and improve the versatility of the power supply device.

[0008] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0009] The accompanying drawings are used to better understand the present scheme and do not constitute a limitation on the present disclosure. Among them:

[0010] Figure 1 is a topology diagram of the power supply device according to an embodiment of the present disclosure;

[0011] Figure 2is a structural schematic diagram of a power supply device according to an embodiment of the present disclosure;

[0012] Figure 3 is a schematic diagram of a battery management unit according to an embodiment of the present disclosure;

[0013] Figure 4 is a schematic diagram of a battery management unit according to another embodiment of the present disclosure;

[0014] Figure 5 is a structural block diagram of a data center according to an embodiment of the present disclosure.

[0015] Reference Signs:

[0016] 10: power supply device;

[0017] 100: power supply module; 110: battery pack; 120: battery management unit; 121: bidirectional DC / DC converter; 122: first battery management subunit; 123: first current sensor; 124: first fan; 125: first current branch; 1251: first contactor; 126: second current branch; 1261: diode; 127: third current branch; 1271: second contactor; 1272: resistor; 128: second battery management subunit; 129: second fan; 130: second current sensor;

[0018] 200: current conversion module; 210: rectification unit; 220: control switch;

[0019] 300: power supply distribution module; 310: power supply connection branch; 320: load connection branch; 330: battery pack connection branch; 340: load branch; 350: battery pack branch;

[0020] 400: monitoring and display module; 500: second cabinet; 600: third cabinet; 700: fourth cabinet. DETAILED DESCRIPTION

[0021] Exemplary embodiments of the present disclosure are described herein with reference to the accompanying drawings, which are meant to be exemplary in nature, and various details are set forth to facilitate an understanding of the present disclosure. It should be apparent to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the spirit and scope of the present disclosure. Also, for the purpose of clarity and a concise description, descriptions of well-known functions and constructions are omitted from the following description.

[0022] The following description is made in connection with the accompanying drawings: Figures 1-4A power supply device 10 according to an embodiment of a first aspect of the present disclosure is described. The power supply device 10 can be applied to a data center. In the following description of the present disclosure, the power supply device 10 is taken as an example applied to a data center. Of course, those skilled in the art can understand that the power supply device 10 can also be applied to other scenarios, and is not limited to a data center. Among them, the data center can be used in technical fields such as cloud computing, cloud storage, big data computing, deep learning, and image processing.

[0023] As shown in Figure 1 The power supply device 10 according to an embodiment of the first aspect of the present disclosure includes a power supply module 100, a current conversion module 200, and a power supply distribution module 300.

[0024] The power supply module 100 includes at least one battery pack 110. That is, the battery pack 110 can be one or more. Alternatively, in the case of multiple battery packs 110, the multiple battery packs 110 can be decoupled from each other and work independently of each other. In the case of failure of a part of the multiple battery packs 110, the failed battery pack 110 can be directly replaced with a functional battery pack 110 without affecting the normal work of the other battery packs 110. In the description of the present disclosure, the meaning of "multiple" is two or more.

[0025] The current conversion module 200 includes an alternating current input end and a direct current output end. Exemplarily, the alternating current input end can be connected to an alternating current power source such as a mains power supply, and the current conversion module 200 can convert the alternating current input from the mains power supply into direct current.

[0026] The power supply distribution module 300 includes a power supply connection branch 310, a load connection branch 320, and a battery pack connection branch 330. The power supply input end of the power supply connection branch 310 is connected to the direct current output end. The load connection branch 320 is connected between the power supply output end of the power supply connection branch 310 and each load. The battery pack connection branch 330 is connected between the power supply output end and each battery pack 110.

[0027] It should be noted that the "connection" in the present embodiment is a physical connection, such as a connection through an electrically conductive wire. When there is current passing between two connected units or modules or components, it can be understood that the two units or modules or components are "electrically connected".

[0028] Exemplarily, the power supply device 10 can further include at least one battery pack branch 350, each battery pack branch 350 being connected between the battery pack connection branch 330 and a corresponding battery pack 110.

[0029] For example, the direct current output end can include a positive output end and a negative output end; the power supply connection branch 310 can include a positive power supply connection sub-branch and a negative power supply connection sub-branch; the load connection branch 320 can include a positive load connection sub-branch and a negative load connection sub-branch; the battery pack connection branch 330 can include a positive battery pack connection sub-branch and a negative battery pack connection sub-branch; and the battery pack branch 350 can include a positive battery pack sub-branch and a negative battery pack sub-branch.

[0030] The input end of the positive power supply connection sub-branch is connected to the positive output end, the positive load connection sub-branch is connected between the output end of the positive power supply connection sub-branch and each load, the input end of the negative power supply connection sub-branch is connected to the negative output end, and the negative load connection sub-branch is connected between the output end of the negative power supply connection sub-branch and each load. The positive battery pack sub-branch is connected between the positive battery pack connection sub-branch and each battery pack 110, and the negative battery pack sub-branch is connected between the negative battery pack connection sub-branch and the battery pack 110. Each battery pack is connected to a positive battery pack sub-branch and a negative battery pack sub-branch.

[0031] The battery pack branch 350 can be provided with a protection device such as a circuit breaker or a fuse. The circuit breaker and the fuse can both achieve short circuit and overload protection of the battery pack branch 350, but their principles are different. The circuit breaker can achieve circuit protection through current bottom magnetic effect (electromagnetic tripping device) and achieve overload protection through the heat effect of current (non-fusing, usually without replacing the device). In the case of providing a circuit breaker on the battery pack branch 350, if the current in the battery pack branch 350 suddenly increases to exceed the load of the circuit breaker, the circuit breaker will automatically disconnect. The fuse is a fuse itself. In the case of providing a fuse on the battery pack branch 350, if the current in the battery pack branch 350 exceeds the preset value, the fuse will melt the fuse with the heat generated by itself, thereby disconnecting the battery pack branch 350 where the fuse is located. In addition, the circuit breaker or the fuse can also be used as a manual maintenance switch. When the battery pack branch 350 where the circuit breaker or the fuse is located needs to be repaired, the circuit breaker can be manually disconnected or the fuse can be pulled out to ensure the safety of the repair.

[0032] A current sensor can be provided on the battery pack branch 350 to detect the current of the battery pack branch 350 in real time. The number of protection devices on the battery pack branch 350 can be determined according to actual needs, and the protection devices mentioned above can be reserved in advance according to actual needs to facilitate subsequent expansion and reconstruction.

[0033] In the case that the battery pack 110 needs to be charged, the current output from the direct current output end is input into the load connection branch 320 after flowing through the power supply connection branch 310, and finally input into the load such as a server from the load connection branch 320 to supply power to the load, and the other part is input into the battery pack connection branch 330, and then input into the corresponding battery pack 110 after flowing through the battery pack connection branch 330 and the battery pack branch 350. In the case that the battery pack 110 is fully charged, there is no current passing between the power supply connection branch 310 and the battery pack branch 350.

[0034] In the case that the mains power supply is powered off, the current is output from the battery pack 110, input into the battery pack connection branch 330 through the battery pack branch 350, input into the load connection branch 320 from the battery pack connection branch 330 after flowing through the battery pack connection branch 330, and finally input into each load from the load connection branch 320. In this way, uninterrupted power supply to the load can be realized within the switching time before the mains power supply is powered off to the diesel generator set is started, and the continuity of power supply is ensured.

[0035] According to the power supply device 10 of the embodiment of the present disclosure, by arranging the power supply distribution module 300 including the power supply connection branch 310, the load connection branch 320 and the battery pack connection branch 330, on the one hand, the continuous power supply to the load and the charging of the battery pack 110 can be realized; on the other hand, the integrated arrangement of the power supply module 100, the current conversion module 200 and the power supply distribution module 300 can be realized, so that the structure of the entire power supply device 10 is more simple and compact, unnecessary cables and switches and other components can be saved, the volume and occupied space of the power supply device 10 are reduced, and the versatility of the power supply device 10 is improved.

[0036] In an embodiment, in combination with Figure 1 In the case that the voltage of the direct current output end is less than the first preset voltage value, at least one battery pack 110 is in a discharging state, and the load connection branch 320 and the battery pack connection branch 330 are in electrical communication.

[0037] Exemplarily, a control switch 220 can be arranged between the alternating current input end and the alternating current power supply such as the mains power supply. In the case that the control switch 220 is closed, the alternating current input end and the alternating current power supply are in electrical communication, and the current conversion module 200 can normally convert alternating current into direct current and output from the direct current output end.

[0038] For example, the first preset voltage value is 260V. When the mains is normal, the voltage of the DC output end is 270V. When the mains is abnormal, for example, the control switch 220 is disconnected, the AC input end is disconnected from the AC power supply, and the voltage of the DC output end gradually decreases. When the voltage of the DC output end is less than 260V, the load connection branch 320 and the battery pack connection branch 330 are electrically connected. The current is output from the battery pack 110, input to the battery pack connection branch 330 through the battery pack branch 350, input to the load connection branch 320 from the battery pack connection branch 330, and finally input to the loads from the load connection branch 320, thereby meeting the voltage required for normal operation of the loads.

[0039] Thus, by the above arrangement, when the voltage of the DC output end is less than the first preset voltage value, the current output from the battery pack 110 can flow through the battery pack connection branch 330 and the load connection branch 320 and then be input to the loads, so that the battery pack 110 can supply power to the loads, thereby fully meeting the voltage requirement of the loads and ensuring normal operation of the loads.

[0040] In an embodiment, when the voltage of the DC output end is greater than or equal to the first preset voltage value and the voltage of at least one battery pack 110 is less than the second preset voltage value, the at least one battery pack 110 is in a charging state, and the power supply connection branch 310 is electrically connected to the load connection branch 320 and the battery pack connection branch 330, respectively, wherein the first preset voltage value is greater than the second preset voltage value.

[0041] For example, the first preset voltage value is 260V and the second preset voltage value is 200V. When the voltage of the DC output end is greater than or equal to 260V, the voltage required for normal operation of the loads can be met, the current output from the DC output end can flow through the power supply connection branch 310 and then be input to the load connection branch 320 and finally input to the loads such as servers from the load connection branch 320, thereby supplying power to the loads. At this time, the battery pack 110 does not need to be discharged. If the voltage of the battery pack 110 is less than 200V, it indicates that the battery pack 110 is insufficient, and the current output from the DC output end flows through the power supply connection branch 310, part of which is input to the load connection branch 320 and finally input to the loads, and the other part is input to the battery pack connection branch 330, flows through the battery pack connection branch 330, and is then input to the corresponding battery pack 110, thereby charging the battery pack 110, until the voltage of the battery pack 110 is greater than or equal to 200V.

[0042] Thus, in the case that the voltage at the DC output end is greater than or equal to the first preset voltage value and the voltage of the at least one battery pack 110 is less than the second preset voltage value, the current output from the DC output end, after flowing through the power supply connection branch 310, can be input to the load through the load connection branch 320 and input to the battery pack 110 through the battery pack connection branch 330, so that the current conversion module 200 can charge the battery pack 110 while ensuring normal operation of the load, thereby ensuring that the battery pack 110 can have sufficient voltage to supply power to the load in the case that the voltage at the DC output end is less than the first preset voltage value.

[0043] In an embodiment, in the case that the voltage at the DC output end is greater than or equal to the first preset voltage value and the capacity of the at least one battery pack 110 is less than the preset capacity value, the at least one battery pack is in a charging state, and the power supply connection branch is in communication with the load connection branch 320 and the battery pack connection branch 330. In this way, in the case that the voltage at the DC output end is greater than or equal to the first preset voltage value and the capacity of the battery pack 110 is insufficient, the current output from the battery pack 110 can also be input to the battery pack 110 through the battery pack connection branch 330, so that the current conversion module 200 can charge the battery pack 110 while ensuring normal operation of the load, thereby ensuring that the battery pack 110 can have sufficient capacity to supply power to the load in the case that the voltage at the DC output end is less than the first preset voltage value.

[0044] In an embodiment, in the case that the voltage at the DC output end is greater than or equal to the first preset voltage value and the voltage of the at least one battery pack 110 is greater than or equal to the second preset voltage value and less than the first preset voltage value, the at least one battery pack 110 is in a standby state, and the power supply connection branch 310 is in electrical communication with the load connection branch 320, wherein the first preset voltage value is greater than the second preset voltage value.

[0045] Exemplarily, the first preset voltage value is 260V and the second preset voltage value is 200V. In the case that the voltage at the DC output end is greater than or equal to 260V, the voltage required for normal operation of the load can be met. If the voltage of the battery pack 110 is greater than or equal to 200V and less than 260V, it indicates that the battery pack 110 has relatively sufficient power and does not need to be charged. Since the voltage at the DC output end is greater than the voltage of the battery pack 110, the working state of the battery pack 110 is a standby state, and at this time, no current passes between the power supply connection branch 310 and the load connection branch 320.

[0046] In this way, when the voltage at the DC output end can meet the power supply requirement of the load and the voltage of the battery pack 110 meets the requirement, the battery pack 110 can only be in standby state without discharging, so that the power of the battery pack 110 can be saved, the power consumption speed of the battery pack 110 is reduced, and energy is saved while meeting the power supply requirement of the load.

[0047] As described above, the "electrically connected" can be understood as having current passing through, for example, when the working state of the battery pack 110 is the charging state, the power supply connection branch 310 is electrically connected with the battery pack connection branch 330; when the working state of the battery pack 110 is the standby state, the power supply connection branch 310 is disconnected with the battery pack connection branch 330.

[0048] In an embodiment, when the voltage at the DC output end is greater than or equal to the first preset voltage value and the capacity of at least one battery pack 110 is greater than or equal to the preset capacity value, the at least one battery pack is in the standby state, and the power supply connection branch 310 is connected with the load connection branch 320. In this way, when the voltage at the DC output end can meet the power supply requirement of the load and the capacity of the battery pack meets the requirement, the battery pack 110 can also only be in the standby state without discharging, so that the power of the battery pack 110 can be saved, the power consumption speed of the battery pack 110 is reduced, and energy is saved while meeting the power supply requirement of the load.

[0049] In an embodiment, as shown in Figure 1 The power supply module 100 further includes at least one battery management unit 120 (Battery Management System, BMS), each battery management unit 120 is connected with each battery pack 110 in one-to-one correspondence, and the battery management unit 120 is configured to change the working state of the corresponding battery pack 110, wherein the working state can be any one of the charging state, the discharging state, the standby state and the starting state.

[0050] The "standby state" can be understood as a state in which the battery pack 110 is kept in a state of only consuming itself without supplying power to the load; and the "starting state" can be understood as a state of the battery pack 110 when the power supply module 100 starts.

[0051] For example, the battery management unit 120 can be connected in series with the corresponding battery pack 110. The power supply module 100 can further include a voltage sensor and a temperature sensor, the voltage sensor can be configured to collect a voltage signal of the battery pack 110, the temperature sensor can be configured to collect a temperature signal of the battery pack 110, and the battery management unit 120 can receive the voltage signal and the temperature signal, so as to maintain and manage the battery pack 110 according to the voltage signal and / or the temperature signal.

[0052] Specifically, for example, in the case that the voltage of the battery pack 110 is less than a second preset voltage value, for example, 200V, the battery management unit 120 can control the corresponding battery pack 110 to change from the standby state to the charging state after receiving the voltage signal sent by the voltage sensor, so that the power supply connection branch 310 is in electrical communication with the load connection branch 320 and the battery pack connection branch 330 respectively, and the charging of the battery pack 110 is realized.

[0053] During the normal operation of the battery pack 110, the temperature of the battery pack 110 is less than a first preset temperature threshold. In the case that the temperature of the battery pack 110 is greater than or equal to the first preset temperature threshold and less than a second preset temperature threshold, the battery management unit 120 sends an alarm information according to the temperature signal to remind the staff to overhaul; in the case that the temperature of the battery pack 110 is greater than or equal to the second preset temperature threshold, the battery management unit 120 can control the electrical communication between the battery pack connection branch 330 and the battery pack branch to be disconnected.

[0054] Therefore, by setting the above-mentioned battery management unit 120, the working state of the corresponding battery pack 110 can be changed, and the overcharging and over-discharging of the battery pack 110 can be prevented, so that the service life of the power supply module 100 can be effectively prolonged.

[0055] In an embodiment, as shown in Figure 3 The battery management unit 120 includes a bidirectional DC / DC converter 121 connected between the battery pack 110 corresponding to the battery management unit 120 and the battery pack connection branch 330. In the case that the current transmission direction of the bidirectional DC / DC converter 121 is a first current transmission direction, the working state of the battery pack 110 is the discharging state or the standby state; in the case that the current transmission direction of the bidirectional DC / DC converter 121 is a second current transmission direction, the working state of the battery pack 110 is the charging state; the second current transmission direction is opposite to the first current transmission direction.

[0056] Exemplarily, the bidirectional DC / DC converter 121 can be connected between the battery pack 110 and the battery pack branch 350. In the case that the voltage at the DC output end is normally 270V, the voltage of the bidirectional DC / DC converter 121 can be set to 260V, and the current transmission direction of the bidirectional DC / DC converter 121 is the first current transmission direction. In the case that the voltage of the battery pack 110 is greater than or equal to the second preset voltage value, the working state of the battery pack 110 is the standby state, and in the case that the voltage of the battery pack 110 is less than the second preset voltage value, the working state of the battery pack 110 is the charging state. In the case that the voltage at the DC output end decreases to less than 260V, the current transmission direction of the bidirectional DC / DC converter 121 changes to the second current transmission direction, so that the load connection branch 320 and the battery pack connection branch 330 are electrically connected, and the current can be input from the battery pack 110 to the load, thereby realizing the persistent power supply of the load.

[0057] Optionally, the battery management unit 120 can further include a first battery management subunit 122, which aggregates the corresponding data in the battery pack 110. The standby state and the discharging state of the battery pack 110 can be realized by the characteristics of the circuit, that is, the current transmission direction of the bidirectional DC / DC converter 121 is automatically changed by the voltage between the battery pack 110 and the DC output end, and at this time, the battery management unit 120 can not participate in the control. The charging state of the battery pack 110 can be realized by the first battery management subunit 122, for example, when the voltage of the battery pack 110 is less than the second preset voltage value, the first battery management subunit 122 can control the current transmission direction of the bidirectional DC / DC converter 121 to change to the second current transmission direction according to the voltage signal sent by the voltage sensor.

[0058] The battery management unit 120 can include a first fan 124 and a first current sensor 123 for collecting the current of the battery pack 110. The first current sensor 123 can communicate with the first battery management subunit 122, so that the first battery management subunit 122 timely disconnects the electrical connection between the corresponding battery pack 110 and the power supply connection branch 310, and disconnects the electrical connection between the battery pack 110 and the load connection branch 320 in the case that the current of the battery pack 110 is too large, and the first battery management subunit 122 can control the first fan 124 to work to dissipate heat for the battery management unit 120.

[0059] Thus, by setting the bidirectional DC / DC converter 121, the bidirectional DC / DC converter 121 can change the working state of the battery pack 110 by changing the current transmission direction. Specifically, when the mains is normal, the bidirectional DC / DC converter 121 outputs power from the battery pack 110, at which time the output voltage of the battery pack 110 can be a fixed voltage value lower than the voltage of the DC output end; when the mains is abnormal, the bidirectional DC / DC converter 121 outputs power from the battery pack 110 to the load, thereby supplying power to the load; when the battery pack 110 needs to be charged, the bidirectional DC / DC converter 121 takes power from the DC output end for small current charging, so that power is input to the battery pack 110, and the bidirectional DC / DC converter 121 can perform current limiting management. In addition, the battery management unit 120 has a simple structure and stable control.

[0060] Of course, the present disclosure is not limited thereto, and in another embodiment, referring to Figure 4 , the battery management unit 120 includes a second battery management subunit 128 and a first current branch 125 and a second current branch 126 connected in parallel. The first current branch 125 is connected between the battery pack 110 corresponding to the battery management unit 120 and the battery pack connection branch 330, respectively, and the first current branch 125 is provided with a first contactor 1251, and the second current branch 126 is provided with a unidirectional conduction diode 1261 in the discharge direction of the battery pack 110. The second battery management subunit 128 is connected to the first contactor 1251, and the second battery management subunit 128 is used to control the opening and closing state of the first contactor 1251.

[0061] For example, in the example of Figure 4 , the positive and negative electrodes on the left side of the first current branch 125 can be connected to the corresponding battery pack 110, the positive electrode on the right side of the first current branch 125 can be connected to the positive battery pack connection sub-branch, and the negative electrode on the right side of the first current branch 125 can be connected to the negative battery pack connection sub-branch.

[0062] The second battery management subunit 128 can also aggregate data within the corresponding battery pack 110. In the case where the voltage of the DC output end is greater than or equal to a first preset voltage value and the voltage of at least one battery pack 110 is greater than or equal to a second preset voltage value less than the first preset voltage value, the second battery management subunit 128 can control the first contactor 1251 to be disconnected, at which time the battery pack 110 can discharge externally through the diode 1261. Since the voltage of the DC output end is greater than the voltage of the battery pack 110, the battery pack 110 only stands by and does not discharge.

[0063] When the second battery management sub-unit 128 detects that the discharge current of the second current sensor 1134 is greater than the preset current value, the second battery management sub-unit 128 can control the first contactor 1251 to be closed, at this time, the battery pack 110 can be discharged to the outside through the first contactor 1251, so that the current can flow from the battery pack 110, flow into the battery pack connection branch 330 through the first current branch 125, and then flow into the load through the load connection branch 320, to realize the power supply for the load, so that in the case of supplying power for the load through the battery pack 110, the discharge can be realized through the first contactor 1251 without passing through the diode 1261, thereby ensuring the service life of the diode 1261, and reducing the power loss on the diode 1261, in addition, the reliability of the power supply can be effectively improved, and in the case of damage or non-closure of the first contactor 1251, the discharge can be realized through the diode 1261, thereby avoiding the interruption of the discharge circuit.

[0064] Of course, in the case that the voltage at the DC output end is less than the first preset voltage value, the battery monitoring sub-unit 128 can also control the first contactor 1251 to be opened, at this time, the battery pack 110 can only supply power to the load through the diode 1261, so that the current can flow from the battery pack 110, flow into the battery pack connection branch 330 and the load connection branch 320, and then flow into the load to realize the power supply for the load.

[0065] In the case that the voltage at the DC output end is greater than or equal to the first preset voltage value and the voltage of at least one battery pack 110 is less than the second preset voltage value, the second battery management sub-unit 128 can control the first contactor 1251 to be closed, at this time, the current output by the DC output end can flow into the battery pack 110 through the power supply connection branch 310, the battery pack connection branch 330, the battery pack branch 350 and the first current branch 125 in turn, thereby charging the battery pack 110.

[0066] Therefore, by setting the above-mentioned diode 1261, first contactor 1251 and second battery management sub-unit 128, the flow direction of the current can be changed by controlling the opening or closing of the first contactor 1251, in the case of opening the first contactor 1251, the battery pack 110 can be in a discharge state or standby state through the diode 1261, and in the case of closing the first contactor 1251, the battery pack 110 can be in a discharge state or charging state through the first current branch 125, thereby also changing the working state of the battery pack 110 according to the actual demand.

[0067] Further, as Figure 4As shown, the battery management unit 120 can further include a third current branch 127 connected in parallel with the first current branch 125, and the third current branch 127 is provided with a second contactor 1271 and a resistor 1272, the second contactor 1271 is connected to a second battery management subunit 128, and the second battery management subunit 128 is configured to control the opening and closing state of the second contactor 1271. Thus, by providing the third current branch 127, when the battery pack 110 is started, the second contactor 1271 can be closed and the first contactor 1251 can be opened, and since the third current branch 127 is provided with the resistor 1272, the starting current can be effectively reduced.

[0068] In an embodiment, the battery management unit 120 can be connected to the battery pack 110 in series, and the battery management unit 120 can be connected to the power supply connection branch 310 and the load connection branch 320 in parallel. Figure 4 When the second battery management subunit 128 controls the first contactor 1251 to be opened and the second contactor 1271 to be closed, the working state of the battery pack 110 corresponding to the battery management unit 120 is a starting state; when the second battery management subunit 128 controls the first contactor 1251 and the second contactor 1271 to be opened, the working state of the battery pack 110 corresponding to the battery management unit 120 is a standby state; and when the second battery management subunit 128 controls the first contactor 1251 to be closed and the second contactor 1271 to be opened, the working state of the battery pack 110 corresponding to the battery management unit 120 is a charging state or a discharging state.

[0069] For example, the battery management unit 120 can include a second fan 129 and a second current sensor 130 for detecting current, and the second current sensor 130 can be in communication with the second battery management subunit 128, so that the second battery management subunit 128 can timely disconnect the corresponding battery pack 110 from the power supply connection branch 310 or the load connection branch 320 when the current of the battery pack 110 is too large. The second battery management subunit 128 can control the second fan 129 to work to dissipate heat from the battery management unit 120.

[0070] When the battery pack 110 is in a standby state, the second battery sensor detects zero current; when the mains power is off, the second current sensor 130 detects a discharging current, thereby closing the first contactor 1251, so that the current discharges through the first contactor 1251, avoiding excessive heat damage caused by discharging through the diode 1261 all the time.

[0071] In this way, when the first contactor 1251 and the second contactor 1271 are disconnected, the battery pack 110 can input current to the outside through the diode 1261, and the battery pack 110 can be kept in a standby state; when the first contactor 1251 is disconnected and the second contactor 1271 is closed, the current can flow through the second current branch 126, thereby reducing the starting current through the resistor 1272; when the first contactor 1251 is closed and the second contactor 1271 is disconnected, the battery pack 110 can be discharged through the second current branch 126 in which the diode 1261 is located and the first current branch 125 in which the first contactor 1251 is located, and the stability is high and the cost is low; and the battery pack 110 can be charged through the first current branch 125 in which the first contactor 1251 is located when the voltage of the battery pack 110 is insufficient.

[0072] In an embodiment, as shown in Figure 1 The power supply device 10 further includes a load branch 340 connected between the load connection branch 320 and the load, and the load branch 340 is provided with a protection switch and a current detection unit. The current detection unit is configured to detect the current on the load branch 340, and the protection switch is configured to be disconnected when the current on the load branch 340 is greater than a preset current value. For example, the protection switch can be a circuit breaker, but is not limited thereto.

[0073] For example, the load branch 340 can include a positive load sub-branch and a negative load sub-branch, wherein the positive load sub-branch is connected between the positive load connection sub-branch and the corresponding load, and the negative load sub-branch is connected between the negative load connection sub-branch and the corresponding load. Each load corresponds to a positive load sub-branch and a negative load sub-branch.

[0074] Therefore, by providing the above-mentioned load branch 340, the power distribution function can be provided for the back-end load, and by providing the above-mentioned protection switch, the protection switch can be used as a connection switch and a maintenance switch of the load, and can effectively protect the short circuit, thereby ensuring the operation safety and stability of the load.

[0075] In an application example, in combination with Figure 3, the battery management unit 120 includes a bidirectional DC / DC converter 121. At this time, the voltage of the DC output end is a constant voltage, such as 270 V, and the voltage of the battery pack 110 can be 200 V to 260 V (including the end point value). The voltage of the battery pack 110 is not constant and can be converted to a fixed voltage, such as 260 V, by the bidirectional DC / DC converter 121. When the battery capacity of the battery pack 110 meets 95% or more or the voltage meets 250 V or more, the bidirectional DC / DC converter 121 keeps the discharge circuit connected, and at this time, the battery pack 110 is in a standby state. When the battery capacity of the battery pack 110 is less than 95% or the voltage is less than 250 V, the bidirectional DC / DC converter 121 keeps the charging and discharging circuits connected, and at this time, the battery pack 110 is in a charging state. When the voltage of the DC output end is lower than the fixed voltage 260 V converted by the bidirectional DC / DC converter 121, the battery pack 110 discharges through the bidirectional DC / DC converter 121 to supply power to the load, regardless of whether the battery pack 110 is in the standby state or the charging state.

[0076] In another application example, in combination with Figure 4 , the battery management unit 120 includes a first contactor 1251, a second contactor 1271, and a diode 1261. At this time, the voltage of the DC output end is a constant voltage, such as 270 V, and the voltage of the battery pack 110 is in a variable range, such as 200 V to 260 V. When the battery capacity of the battery pack 110 meets 95% or more or the voltage meets 250 V or more, the battery pack 110 discharges through the diode 1261, and at this time, the battery pack 110 is in a standby state. When the battery capacity of the battery pack is less than 95% or the voltage is less than 250 V, the charging circuit and the discharging circuit are connected, and at this time, the current flows through the first contactor 1251 to charge the battery pack 110. When the voltage of the battery pack 110 meets 260 V or the battery capacity meets 100%, the charging stops, i.e., the charging state ends. When the voltage of the DC output end is lower than the voltage of the battery pack 110, the battery pack 110 discharges through the first contactor 1251 to supply power to the load, regardless of whether the battery pack 110 is in the standby state or the charging state.

[0077] In an embodiment, as shown in Figure 1 , the battery pack 110 includes a plurality of batteries, such as lithium batteries, which can be connected in series, and the current conversion module 200 includes at least one rectification unit 210.

[0078] Exemplarily, the rectifier units 210 can be multiple, the input ends of the rectifier units 210 can be connected to the AC input end, and the output ends of the rectifier units 210 can be connected to the DC output end. The number of the rectifier units 210 can be flexibly adjusted according to actual needs to better meet actual application.

[0079] Each rectifier unit 210 can be a small-power hot plug module. For example, the power of the hot plug module can be 15 kW or 30 kW, etc. The hot plug module can rectify single-phase or three-phase AC power into DC power, such as DC 240 V or DC 336 V. Each hot plug module is independent of each other, thereby supporting expansion and mixed use of new and old, and operation and maintenance is more convenient.

[0080] In related technologies, the uninterruptible power supply system of a data center usually includes the following four kinds:

[0081] The first kind is an uninterruptible power supply (UPS) plus lead-acid battery scheme, which uses a lead-acid battery as a backup power supply. The charging of the UPS and the lead-acid battery needs to go through AC / DC and DC / DC processes, and the discharging needs to go through DC / DC and DC / AC processes. However, since the lead-acid battery needs to be set up in a separate battery room in the data center, it occupies a large building area, and needs to be regularly maintained offline, the monitoring system can usually only collect part of the data, and the operation and maintenance is difficult. In addition, the lead-acid battery has low discharge rate and short service life, and is difficult to meet the current high-power and short backup time requirements. Therefore, this way has low power supply efficiency, complex control, many fault points, and multiple devices, which are complex in procurement, installation, construction, etc.

[0082] The second kind is a high-voltage direct current (HVDC) plus lead-acid battery scheme, which uses a lead-acid battery as a backup power supply. The charging of the HVDC and the lead-acid battery needs to go through an AC / DC process, and the discharging is directly supplied by the HVDC to the load. However, the lead-acid battery has a large footprint, a short service life, and difficult operation and maintenance, and also has multiple devices, which are complex in procurement, installation, construction, etc.

[0083] The third kind is a UPS plus lithium battery scheme, which uses a lithium battery as a backup power supply. The charging of the UPS and the lithium battery needs to go through AC / DC and DC / DC processes, and the discharging needs to go through DC / DC and DC / AC processes, and the application failure rate is high. This way has low power supply efficiency, complex control, many fault points, and multiple devices, which are complex in procurement, installation, construction, etc.

[0084] Fourth: Distributed lithium battery solution, directly convert 220V or 380V mains to 12V, 48V or 240V DC power supply for standard servers, and then through the cabinet level lithium battery backup system and the above voltage parallel. This way usually need to customize the IT load cabinet, poor versatility, and lithium battery distributed layout, monitoring system negative complex, and the overall capacity redundant configuration, high cost.

[0085] The above embodiments of the present disclosure can use a complete power supply device 10 instead of the conventional multiple uninterruptible power supply system devices, which solves the problems of the conventional uninterruptible power supply system, such as complexity, separate configuration and procurement of batteries, short service life of devices, complex construction and debugging work, difficulty in expansion, poor flexibility, etc. Moreover, compared with UPS, the power supply efficiency of the rectifier unit 210 is higher, and the building area is saved.

[0086] In one example, the power supply module 100 can also include a balancing unit, which can be arranged one-to-one with the battery pack 110 to realize consistency balancing of each battery.

[0087] In one embodiment, as shown in Figure 1 and Figure 2 The power supply device 10 further comprises a monitoring and display module 400 in communication with the power supply module 100, the current conversion module 200 and the power supply distribution module 300, for monitoring and displaying the working data of the power supply module 100, the current conversion module 200 and the power supply distribution module 300.

[0088] Exemplarily, the monitoring and display module 400 can be a human-machine interface (HMI), which can collect, monitor and display working data, such as the voltage and current of the AC power supply, such as the mains, the voltage, current and temperature of the rectifier unit 210, the current, switch state of each branch (such as the power supply connection branch 310, the load connection branch 320, the battery pack connection branch 330, the load branch 340 and the battery pack branch 350, etc.), and the information of each battery management unit 120.

[0089] The battery management unit 120 can have a communication interface connected to the HMI to realize communication with the HMI, but the control of the battery management unit 120 can not completely rely on the HMI. When the communication between the battery management unit 120 and the HMI is interrupted, the battery management unit 120 can also work normally, ensuring the reliability of the power supply module 100.

[0090] Therefore, the whole power supply device 10 can have only one monitoring display module 400, which simplifies the monitoring path, integrates the working data and functions of the power supply device 10, and makes the monitored working data more accurate, thereby greatly improving the stability of the power supply device 10, the communication quality between modules, the convenience of operation and maintenance, and the like.

[0091] In an optional embodiment, the power supply device 10 can further include a first cabinet (not shown in the figure), and the power supply module 100, the current conversion module 200 and the power supply distribution module 300 are all arranged in the first cabinet. In this way, the integrity of the power supply device 10 can be effectively ensured, so that the power supply module 100, the current conversion module 200 and the power supply distribution module 300 can be integrated in the first cabinet, thereby enabling the power supply device 10 to be transported to the site as a whole, realizing the rapid assembly and delivery of the power supply device 10, and facilitating installation.

[0092] In another optional embodiment, referring to Figure 2 and combining Figure 1 , the power supply device 10 further includes a second cabinet 500, a third cabinet 600 and a fourth cabinet 700. The power supply module 100 is at least partially arranged in the second cabinet 500, the current conversion module 200 is at least partially arranged in the third cabinet 600, and the power supply distribution module 300 is at least partially arranged in the fourth cabinet 700.

[0093] The "power supply distribution module 300 is at least partially arranged in the fourth cabinet 700" can be understood as that at least a part of the power supply distribution module 300 is arranged in the fourth cabinet 700, for example, the power supply connection branch 310 can pass through the fourth cabinet 700 and extend into the third cabinet 600 to be connected with the direct current output end, and is not limited to that the power supply distribution module 300 is entirely arranged in the fourth cabinet 700.

[0094] Exemplarily, the second cabinet 500, the third cabinet 600 and the fourth cabinet 700 can be integrally transported to the site by skids or bases; or the second cabinet 500, the third cabinet 600 and the fourth cabinet 700 can be transported to the site respectively. The number of the second cabinet 500 can be flexibly adjusted according to the power demand of the power supply device 10, the third cabinet 600 can support capacity expansion in the case of reserving switches, and a battery cabinet level or battery module level fire-fighting module can be arranged in the second cabinet 500 to improve the safety of the power supply module 100. The number of the third cabinet 600 can be one or more, which can be determined according to the number of the rectifier unit 210, and an alternating current circuit breaker can be arranged on the side of the third cabinet 600 for power supply to protect and power-off maintenance, and a voltage transformer and a current transformer can be configured. Optionally, the power supply device 10 can further include a fifth cabinet, and the monitoring and display module 140 can be arranged in the fifth cabinet. The actual size and number of the second cabinet 500, the third cabinet 600, the fourth cabinet 700 and the fifth cabinet can be set according to the capacity or power of the specific system, and each cabinet can be composed of multiple cabinets, and the number and size of the cabinet are not limited in the present disclosure.

[0095] Therefore, by arranging the second cabinet 500, the third cabinet 600 and the fourth cabinet 700, the power supply module 100, the current conversion module 200 and the power supply distribution module 300 can be conveniently maintained and repaired while ensuring the rapid assembly and delivery of the power supply device 10.

[0096] According to the data center of the second aspect of the present disclosure, as shown in Figure 5 the power supply device 10 according to any embodiment of the first aspect of the present disclosure is included.

[0097] According to the data center of the present disclosure, by using the power supply device 10 described above, the power supply module 100, the current conversion module 200 and the power supply distribution module 300 can be integrally arranged, thereby reducing the building area of the data center, and enabling the power supply device 10 to be universal while realizing uninterrupted power supply for the load of the data center.

[0098] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present disclosure.

[0099] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and do not imply or suggest relative importance or a number of the indicated technical features. Thus, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features.

[0100] In the present disclosure, unless specifically defined otherwise and limited, the terms "mount", "connect", "connection", "fixed", and the like, should be given their broadest possible interpretation in accordance with the principle that the present disclosure can be implemented in different ways. For example, it can be fixed connection, or detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0101] In the present disclosure, unless specifically defined otherwise and limited, the terms "mount", "connect", "connection", "fixed", and the like, should be given their broadest possible interpretation in accordance with the principle that the present disclosure can be implemented in different ways. For example, it can be fixed connection, or detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0102] The above disclosure provides many different embodiments or examples for implementing different structures of the present disclosure. In order to simplify the disclosure of the present disclosure, the components and settings of specific examples are described above. Of course, they are only examples, and the purpose is not to limit the present disclosure. In addition, the present disclosure can repeatedly refer to numbers and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0103] The above detailed description does not constitute a limitation on the scope of protection of the present disclosure. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims

1. A power supply device, comprising: a power module including at least one battery pack; a current conversion module including an alternating current input end and a direct current output end; a power supply distribution module including a power supply connection branch, a load connection branch and a battery pack connection branch, a power supply input end of the power supply connection branch being connected to the direct current output end, the load connection branch being connected between a power supply output end of the power supply connection branch and each load, and the battery pack connection branch being connected between the power supply output end and each battery pack; the power module further comprising: a battery management unit including: a first current branch, a second current branch and a third current branch connected in parallel, the first current branch being connected between the battery pack connection branch and a battery pack corresponding to the battery management unit, a first contactor being arranged on the first current branch, a diode unidirectionally conducting in a discharge direction of the battery pack being arranged on the second current branch, and a second contactor and a resistor being arranged on the third current branch, the first contactor and the second contactor being connected to a second battery management subunit respectively, the second battery management subunit being used to control opening and closing states of the first contactor and the second contactor; wherein, in a case that the second battery management subunit controls the first contactor to be closed and the second contactor to be opened, a working state of the battery pack corresponding to the battery management unit is a charging state or a discharging state.

2. The power supply device of claim 1, wherein, in a case that a voltage of the direct current output end is less than a first preset voltage value, at least one battery pack is in a discharging state, and the load connection branch and the battery pack connection branch are electrically connected.

3. The power supply device of claim 1, wherein, in a case that the voltage of the direct current output end is greater than or equal to the first preset voltage value and a voltage of at least one battery pack is less than a second preset voltage value, the at least one battery pack is in a charging state, and the power supply connection branch is electrically connected to the load connection branch and the battery pack connection branch respectively, wherein the first preset voltage value is greater than the second preset voltage value.

4. The power supply device of claim 1, wherein, in a case that the voltage of the direct current output end is greater than or equal to the first preset voltage value and a capacity of at least one battery pack is less than a preset capacity value, the at least one battery pack is in a charging state, and the power supply connection branch is connected to the load connection branch and the battery pack connection branch respectively.

5. The power supply device of claim 1, wherein, in a case that the voltage of the direct current output end is greater than or equal to the first preset voltage value and a voltage of at least one battery pack is greater than or equal to the second preset voltage value which is less than the first preset voltage value, the at least one battery pack is in a standby state, and the power supply connection branch is electrically connected to the load connection branch, wherein the first preset voltage value is greater than the second preset voltage value.

6. The power supply device of claim 1, wherein, in a case that the voltage of the direct current output end is greater than or equal to the first preset voltage value and a capacity of at least one battery pack is greater than or equal to a preset capacity value, the at least one battery pack is in a standby state, and the power supply connection branch is connected to the load connection branch.

7. The power supply device of claim 1, wherein, the power module further comprising: At least one battery management unit, each of the battery management units being connected to each of the battery groups one by one, and the battery management unit being used to change the working state of the battery group, wherein the working state is any one of the charging state, the discharging state, the standby state and the starting state.

8. The power supply device of claim 7, wherein, The battery management unit comprises: A bidirectional DC / DC converter connected between the battery group corresponding to the battery management unit and the battery group connection branch; Wherein, in the case that the current transmission direction of the bidirectional DC / DC converter is the first current transmission direction, the working state of the battery group is the discharging state or the standby state; in the case that the current transmission direction of the bidirectional DC / DC converter is the second current transmission direction, the working state of the battery group is the charging state; the second current transmission direction is opposite to the first current transmission direction.

9. The power supply device of claim 1, wherein, In the case that the second battery management sub-unit controls the first contactor to be disconnected and the second contactor to be closed, the working state of the battery group corresponding to the battery management unit is the starting state; In the case that the second battery management sub-unit controls the first contactor and the second contactor to be disconnected, the working state of the battery group corresponding to the battery management unit is the standby state.

10. The power supply device according to any one of claims 1-9, further comprising: A load branch connected between the load connection branch and the load, and a protection switch and a current detection unit are arranged on the load branch, the current detection unit is used to detect the current on the load branch, and the protection switch is used to be disconnected in the case that the current on the load branch is greater than a preset current value.

11. The power supply device according to any one of claims 1-9, wherein, The battery group comprises a plurality of lithium batteries connected in series; The current conversion module comprises at least one rectifier unit.

12. The power supply device according to any one of claims 1-9, further comprising: A monitoring display module in communication with the power supply module, the current conversion module and the power supply distribution module, used to monitor and display the working data of the power supply module, the current conversion module and the power supply distribution module.

13. The power supply device according to any one of claims 1-9, further comprising: A first cabinet, and the power supply module, the current conversion module and the power supply distribution module are arranged in the first cabinet.

14. The power supply device according to any one of claims 1-8, further comprising: A second cabinet, and the power supply module is at least partially arranged in the second cabinet; A third cabinet, and the current conversion module is at least partially arranged in the third cabinet; A fourth cabinet, and the power supply distribution module is at least partially arranged in the fourth cabinet.

15. A data center comprising the power supply device according to any one of claims 1-14.

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