Battery device and power supply system for data center

Abstract

A battery device (10). The battery device (10) comprises a direct-current input end (11), a control unit (12), a plurality of power storage units (13), a gating module (14), and at least one output unit (15); the direct-current input end (11) is used for being connected to a direct-current source (20) of a power supply system, and the direct-current input end (11) is electrically connected to an input end of each power storage unit (13) and the output unit (15) by means of the gating module (14); an output end of each power storage unit (13) is electrically connected to the output unit (15); the output unit (15) is used for being connected to a corresponding load (30); and a communication end and / or a control output end of the control unit (12) is electrically connected to the power storage units (13), the gating module (14), and the output unit (15). Further provided is a power supply system for a data center. The present application aims to provide a battery device (10) convenient for distributed arrangement in a power supply system, and the number of power storage units (13) connected in the battery device (10) can be correspondingly increased or decreased on the basis of the actual power supply output requirement of the battery device (10), so as to meet the safety and stability of supplying power to loads.

Description

Battery devices and data center power supply systems

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on August 14, 2023, with application number 202322179636.4 and application name: "Battery device and power supply system for data center", the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The utility model relates to the technical field of energy storage, and in particular to a battery device and a power supply system for a data center. Background Art

[0003] Data centers not only require large amounts of electricity to maintain the operation of equipment such as servers, storage devices, backup devices, and cooling systems, but also generally require batteries to be equipped with the data center's power supply system to prevent data loss or damage to related equipment due to sudden interruptions in the mains power supply to the data center. These batteries can be used to power the data center in the event of an external power outage, maintaining normal operation of the data center.

[0004] To meet the massive power demands of data centers, multiple batteries are often installed and connected in series to form battery banks. However, if one battery fails, the others will be unable to power the data center. Furthermore, if a battery fire occurs, it can easily spread to other batteries, causing them to burn out or short-circuit, resulting in significant equipment damage. Simply distributing the battery banks separately can lead to situations where a single battery's charge level is too low to meet the load requirements.

[0005] The above content is only used to assist in understanding the technical solution of the present invention and does not constitute an admission that the above content is prior art.

[0006] Utility Model Content

[0007] The utility model proposes a battery device and a power supply system for a data center, aiming to propose a battery device that can increase or decrease the number of storage units according to the actual power output needs of the battery device, and to achieve power supply complementarity between different distributed battery devices to meet the safety and stability of power supply to the load.

[0008] To achieve the above-mentioned purpose, the present invention proposes a battery device, which includes a DC input terminal, a control unit, multiple storage units, a gating module and at least one output unit, wherein the DC input terminal is used to connect to the DC source of the power supply system, and the DC input terminal is electrically connected to the input terminal of each storage unit and the output unit through the gating module, the output terminal of each storage unit is electrically connected to the output unit, and the output unit is used to connect to the load, and the communication terminal and / or control output terminal of the control unit are electrically connected to the storage unit, the gating module and the output unit; when the battery device inputs electric energy through the DC input terminal, the conduction direction of the gating module is from the DC input terminal to the output unit; when the battery device outputs electric energy through the DC input terminal, the conduction direction of the gating module is from the output unit to the DC input terminal.

[0009] Optionally, the gating module is a bidirectional transformer unit;

[0010] Alternatively, the gating module is provided with a unidirectional conduction switch and a first unidirectional transformer unit in parallel, wherein the conduction direction of the unidirectional conduction switch is from the DC input end to the output unit, and the conduction direction of the first unidirectional transformer unit is from the output unit to the DC input end.

[0011] Optionally, the unidirectional conducting switch is a diode;

[0012] Alternatively, the unidirectional conduction switch is a MOS transistor, and the control output end of the control unit is also electrically connected to the control end of the MOS transistor.

[0013] Optionally, the power storage unit is connected to the battery device in a detachable electrical connection manner.

[0014] Optionally, the battery device also includes a first switch module, wherein the selection module is electrically connected to the output unit via the first switch module; the input end and the output end of the storage unit are respectively electrically connected to the two conduction ends of the first switch module; and the control output end of the control unit is electrically connected to the control end of the first switch module.

[0015] Optionally, the battery device further includes a second switch module, wherein the DC input end is electrically connected to the gating module via the second switch module; and the control output end of the control unit is electrically connected to the control end of the second switch module.

[0016] Optionally, the power storage unit includes a second unidirectional transformer unit, a battery and a third switch module, wherein the input end of the second unidirectional transformer unit is the input end of the power storage unit, the charging and discharging end of the battery is electrically connected to the output end of the second unidirectional transformer unit and the first conductive end of the third switch module, and the second conductive end of the third switch module is the output end of the power storage unit.

[0017] To achieve the above objectives, the present invention proposes a power supply system for a data center, which includes a DC source and multiple battery devices. The battery devices are the battery devices described above, and the DC source is electrically connected to the DC input terminals of the battery devices.

[0018] The beneficial effect of the technical solution of the present utility model is that: a battery device that can be easily distributed in the power supply system is proposed, so that when the power supply system loses external energy supply, the distributed battery device can continue to maintain the normal operation of multiple loads, while avoiding the risk of high temperature fire caused by the centralized installation of battery devices. Even if any battery device fails, it will not affect the other battery devices to continue to supply power to the load. Moreover, by arranging multiple parallel storage units in each battery device, the storage capacity of a single battery device can be increased to a certain extent, so that the power supply of the battery device can meet the power supply demand of the connected load as much as possible. During use, the number of storage units connected to a single battery device can be increased or decreased according to actual needs. Even if the power supply of the battery device cannot meet the power supply needs of the load it is connected to, the battery device can still obtain power supply from other battery devices with surplus power in the power supply system to make up for the shortfall in its power supply (of course, if the power supply of the battery device is surplus, it can also supply power to other battery devices with insufficient power supply). In this way, the power between the battery devices can be reasonably allocated, thereby ensuring that the battery devices in the power supply system can meet the power supply needs of the corresponding loads and avoiding any load power shortage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is a schematic structural diagram of an embodiment of a battery device of the present invention;

[0020] FIG2 is a schematic structural diagram of another embodiment of the battery device of the present invention;

[0021] FIG3 is a schematic structural diagram of another embodiment of the battery device of the present invention;

[0022] FIG4 is a schematic structural diagram of a power storage unit in an embodiment of a battery device according to the present invention;

[0023] FIG5 is another schematic structural diagram of the power storage unit in one embodiment of the battery device of the present invention;

[0024] FIG6 is a schematic structural diagram of the power supply system of the present invention.

[0025] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the schemes in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element.

[0029] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0030] The present invention proposes a battery device. Referring to Figure 1, the battery device 10 includes a DC input terminal 11, a control unit 12, a plurality of storage cells 13, a gating module 14 and at least one output unit 15, wherein the DC input terminal 11 is used to connect to a DC source 20 of a power supply system, and the DC input terminal 11 is electrically connected to the input terminal of each storage cell 13 and the output unit 15 through the gating module 14, the output terminal of each storage cell 13 is electrically connected to the output unit 15, and the output unit 15 is used to connect to a load 30, and the communication terminal and / or the control output terminal of the control unit 12 are electrically connected to the storage cell 13, the gating module 14 and the output terminal; when the battery device 10 inputs electric energy through the DC input terminal 11, the conduction direction of the gating module 14 is from the DC input terminal 11 to the output unit 15; when the battery device 10 outputs electric energy through the DC input terminal 11, the conduction direction of the gating module 14 is from the output unit 15 to the DC input terminal 11.

[0031] In this embodiment, the power supply system may be a power supply system of a data center.

[0032] Optionally, the power supply system includes a DC source 20 and multiple battery devices 10. The DC source 20 can be used to receive external energy (such as AC mains) and convert the external energy into DC power suitable for the load 30 of the data center, and then output it to each battery device 10.

[0033] Optionally, the DC source 20 may be provided with a plurality of DC output terminals, and each DC output terminal may be electrically connected to a battery device 10 .

[0034] Optionally, the battery device 10 shown in Figure 1 can be any battery device 10 provided in the power supply system. The following description will be made using any battery device 10 provided in the power supply system as an example; wherein, the number of storage units 13 provided in the battery device 10 is at least two, and what is shown in Figure 1 is only an exemplary structure and should not constitute a limitation to this embodiment.

[0035] Optionally, the DC input terminal 11 in the battery device 10 is used to connect to the DC output terminal of the DC source 20, so that the DC power output by the DC output terminal of the DC source 20 can be input into the battery device 10 through the DC input terminal 11 in the battery device 10.

[0036] Optionally, the control unit 12 can be a control system of the battery device 10, or a device with control functions such as a single-chip microcomputer. The power supply end of the control unit 12 can be electrically connected to the DC input end 11, or electrically connected to at least one storage unit 13, so as to draw power from the DC input end 11 or the storage unit 13 for the operation of the control unit 12. Optionally, the control unit 12 in the battery device 10 can be used to monitor and control the battery device 10 to which it belongs (such as monitoring the storage capacity of the storage unit 13, monitoring the current of any circuit of the battery device 10, or controlling the conduction mode of the switching gating module 14), and is responsible for the management of the battery device 10 (such as controlling the charging and discharging of each storage unit 13). The communication terminal and / or control output terminal of the control unit 12 are electrically connected to the power storage unit 13, the gating module 14, and the output unit 15. The communication terminal of the control unit 12 is used to communicate with each module and unit in the battery device 10, as well as with other battery devices 10 connected to the power supply system. The control output terminal of the control unit 12 is used to output corresponding control signals to each module and unit in the battery device 10 to control the operation of each module and unit. In addition, the control unit 12 may also be provided with multiple detection terminals for detecting the power level of the battery 132 of each power storage unit 13, the current of any circuit in the battery device 10, etc.

[0037] Optionally, the first conductive end and the second conductive end of the gating module 14 are both bidirectional conductive ends, with the first conductive end electrically connected to the DC input end 11, and the second conductive end electrically connected to the input end of the storage unit 13 and the output unit 15. Furthermore, the control output end of the control unit 12 is electrically connected to the control end of the gating module 14, so that the control unit 12 can control the gating module 14 to switch between different conduction modes by outputting corresponding control signals to the gating module 14; wherein, the first conduction mode of the gating module 14 is that current flows from the first conduction end to the second conduction end, and the second conduction mode of the gating module 14 is that current flows from the second conduction end to the first conduction end.

[0038] Optionally, when power is input to the DC input terminal 11, the control unit 12 may control the gating module 14 to be in the first conduction mode, so that the current conduction direction of the gating module 14 is from the DC input terminal 11 to the output unit 15. Since the first conduction terminal of the gating module 14 is electrically connected to the DC input terminal 11, and the second conduction terminal of the gating module 14 is electrically connected to the input terminal of each storage unit 13 and the output unit 15, when the gating module 14 is in the first conduction mode, the DC power input from the DC input terminal 11 can flow through the gating module 14 and the output unit 15 in sequence, and be delivered by the output unit 15 to the load 30 to power the load 30, and / or charge the multiple storage units 13 arranged in parallel in the battery device 10 through the gating module 14.

[0039] Each battery device 10 is provided with one or more output units 15 , and each output unit 15 can be connected to one or more loads 30 .

[0040] Optionally, in addition to being used to connect to the load 30, the output unit 15 can also be used to monitor the status of the load 30, such as whether the load 30 has a power supply demand, the power supply demand of the load 30, etc.; that is, the output unit 15 can serve as a circuit protection device and can have corresponding detection and metering functions (such as detecting whether a battery device 10 is connected to one side of the load 30), and report the corresponding detection and metering to the control unit 12 through a communication connection with the control unit 12. Among them, the output unit 15 can be an output distribution unit (such as a distribution cabinet, a small busbar, etc.) to distribute the output power of the battery device 10 to the load 30; at the same time, the control unit 12 can control whether the output distribution unit is working or not, so that the distribution unit can act as a circuit switch, that is, by controlling whether the distribution unit is working or not, the line between the battery device 10 and the load 30 can be controlled to be connected or disconnected.

[0041] In some optional embodiments, a controllable switch may be further provided in the output unit 15 , and the control unit 12 controls the controllable switch to be closed or opened, thereby correspondingly controlling the connection or disconnection of the line between the battery device 10 and the load 30 .

[0042] Optionally, since the second conductive end of the gating module 14 is electrically connected to the output unit 15, and the input end of each storage unit 13 in the battery device 10 is electrically connected to the second conductive end of the gating module 14, and the output end of each storage unit 13 is electrically connected to the output unit 15, the multiple storage units 13 in the battery device 10 can be equivalent to being connected in parallel between the second conductive end of the gating module 14 and the output unit 15 (or the line between the gating module 14 and the output unit 15 is regarded as a DC bus, then the multiple storage units 13 can be equivalent to being connected to the DC bus in parallel). In this way, not only can the storage capacity of a single battery device 10 be improved to a certain extent, but also when any storage unit 13 in the battery device 10 fails, it will not affect the normal use of other storage units 13, so that the other storage units 13 can continue to charge or supply power to the load 30, ensuring that the battery device 10 can operate stably.

[0043] Optionally, when there is no power input to the DC input terminal 11 (eg, when the DC source 20 is supplying power abnormally), the power storage unit 13 in the battery device 10 may be enabled to supply power to the load 30 connected to the battery device 10 .

[0044] Optionally, the control unit 12 in the local battery device 10 may establish a communication connection with the control units 12 of other battery devices 10 in the power supply system.

[0045] Optionally, when the external energy supply connected to the power supply system is abnormal and the DC source 20 of the power supply system has no current output, if the storage capacity of other battery devices 10 is insufficient to meet the power supply demand of the load 30 connected to the battery device 10, then the other battery devices 10 can send power shortage information to the control unit 12 of the local battery device 10. In this way, when the control unit 12 of the local battery device 10 receives the power shortage information of other battery devices 10, if it is detected that the local battery device 10 does not need to power the load 30 or the storage capacity of the local battery device 10 is sufficient to meet the power supply demand of the load 30 (that is, the local battery device 10 has surplus power), then the local battery device 10 The control unit 12 of the local battery device 10 can control the gating module 14 to switch to the second conduction mode, so that the current conduction direction of the gating module 14 is switched to the direction from the DC input end 11 to the output unit 15. In this way, the storage unit 13 in the local battery device 10 can pass through the gating module 14 and the DC output end in turn to reversely supply power to the DC output end of the DC source 20, and the DC source 20 transfers the current provided by the local battery device 10 to other battery devices 10. In this way, other battery devices 10 with insufficient power supply can obtain the power supply of the local battery device 10 from the DC output end of the DC source 20 to make up for the insufficient power supply.

[0046] Optionally, when the external energy supply connected to the power supply system is abnormal, resulting in no current output from the DC source 20, if the storage capacity of the local battery device 10 is insufficient to meet the power supply requirements of the load 30 connected to the battery device 10, the local battery device 10 can send power shortage information to the control units 12 of other battery devices 10. In this way, when the control units 12 of other battery devices 10 receive the power shortage information of the local battery device 10, if the other battery devices 10 do not need to power the load 30 or the storage capacity of the other battery devices 10 is sufficient to meet the power supply requirements of the load 30 (that is, the other battery devices 10 have surplus power), the control units 12 of the other battery devices 10 can reverse power the DC output end of the DC source 20, and the DC source 20 transfers the current provided by the other battery devices 10 to the local battery device 10. In this way, the local battery device 10 can obtain the power supply of the other battery devices 10 from the DC output end of the power supply system (at this time, the control unit 12 of the local battery device 10 needs to control the selection module 14 to be in the first conduction mode) to make up for the insufficient power supply.

[0047] In one embodiment, a battery device 10 is proposed that can be easily distributed in a power supply system. When the power supply system loses external energy supply, the distributed battery devices 10 can continue to maintain the normal operation of multiple loads 30 while avoiding the risk of high temperature fire caused by the centralized arrangement of the battery devices 10. Even if any battery device 10 fails, it will not affect the other battery devices 10 from continuing to supply power to the loads 30. Moreover, by providing multiple parallel storage units 13 in each battery device 10, the storage capacity of a single battery device 10 can be increased to a certain extent, so that the power supply of the battery device 10 can meet the power supply demand of the connected load 30 as much as possible. When in use, The number of storage units 13 connected to a single battery device 10 may be increased or decreased according to actual circumstances. Even if the power supply of the battery device 10 cannot meet the power supply demand of the connected load 30, the battery device 10 can obtain power supply from other battery devices 10 with surplus power in the power supply system to make up for the insufficient power supply (of course, if the power supply of the battery device 10 is surplus, it can also supply power to other battery devices 10 with insufficient power supply). In this way, the power between the battery devices 10 can be reasonably allocated, thereby ensuring that the battery devices 10 in the power supply system can meet the power supply demand of the corresponding load 30 and avoiding the occurrence of insufficient power supply to any load 30.

[0048] In one embodiment, based on the above embodiment, the gating module 14 is a bidirectional voltage transformation unit.

[0049] In this embodiment, the bidirectional transformer unit can be a DC / DC (direct current to direct current) voltage power conversion unit. When the selection module 14 is in the first conduction mode, the current flow direction of the bidirectional transformer unit is from the DC input terminal 11 to the output unit 15; when the selection module 14 is in the second conduction mode, the current flow direction of the bidirectional transformer unit is from the output unit 15 to the DC input terminal 11.

[0050] Optionally, if the selection module 14 is in the first conduction mode, the bidirectional transformer unit can be used to convert the first voltage input externally to the DC input terminal 11 into a second voltage that is compatible with the required voltage of the load 30 and / or the rated charging voltage of the storage unit 13. In this way, the first voltage input from the DC input terminal 11 can be converted into the second voltage by the bidirectional transformer unit to supply power to the load 30 and / or charge the storage unit 13.

[0051] Optionally, if the selection module 14 is in the second conduction mode, the bidirectional transformer unit can be used to convert the third voltage output by the storage unit 13 into a fourth voltage, wherein the fourth voltage is the voltage portion that is lacking in the battery device 10 with insufficient power supply in the power supply system. In this way, when other battery devices 10 in the power supply system cannot meet the power supply demand of the load 30, and the battery device 10 at this end has surplus power storage capacity, then the third voltage output by the storage unit 13 of the battery device 10 at this end, after being converted into the fourth voltage by the bidirectional transformer unit, can be reversely output to the DC output end of the power supply system through the DC input end 11, so that other battery devices 10 with insufficient power supply can obtain the fourth voltage from the DC output end of the power supply system to make up for the insufficient power supply.

[0052] It should be noted that, in addition to controlling the gating module 14 to switch between different conduction modes, the control unit 12 can also adjust the transformation parameters of the bidirectional transformer unit to adjust the voltage converted by the bidirectional transformer unit.

[0053] Alternatively, in some optional embodiments, referring to Figure 2, the gating module 14 is provided with a unidirectional conduction switch 141 and a first unidirectional transformer unit 142 in parallel, wherein the conduction direction of the unidirectional conduction switch 141 is from the DC input terminal 11 to the output unit 15, and the conduction direction of the first unidirectional transformer unit 142 is from the output unit 15 to the DC input terminal 11.

[0054] Optionally, the internal current of the unidirectional conduction switch 141 can only flow from the first conduction end of the unidirectional conduction switch 141 to the second conduction end of the unidirectional conduction switch 141, and the first conduction end of the unidirectional conduction switch 141 is electrically connected to the DC input end 11, and the second conduction end is electrically connected to the output unit 15, so that the current conduction direction of the unidirectional conduction switch 141 is from the DC input end 11 to the output unit 15; the internal current of the first unidirectional transformer unit 142 can only flow from the input end of the first unidirectional transformer unit 142 to the output end of the first unidirectional transformer unit 142, and the output end of the first unit transformer unit is electrically connected to the DC input end 11, and the input end is electrically connected to the output unit 15, so that the current conduction direction of the first unidirectional transformer unit 142 is from the output end to the DC input end 11.

[0055] Moreover, since the first conducting end of the unidirectional conducting switch 141 is electrically connected to the output end of the first unidirectional transformer unit 142, and the second conducting end of the unidirectional conducting switch 141 is electrically connected to the input end of the first unidirectional transformer unit 142, the unidirectional conducting switch 141 and the first unidirectional transformer unit 142 are equivalent to being arranged in parallel in the selection module 14.

[0056] Optionally, the control end of the first unidirectional transformer unit 142 is electrically connected to the control output end of the control unit 12, so that the control unit 12 can control the input end and output end of the first unidirectional transformer unit 142 to connect or disconnect the line between the internal circuit of the first unidirectional transformer unit 142 by outputting a corresponding control signal to the control end of the first unidirectional transformer unit 142.

[0057] Optionally, the unidirectional conduction switch 141 may be a diode or a MOS transistor. If the unidirectional conduction switch 141 is a diode, the first conduction end of the unidirectional conduction switch 141 is the anode of the diode, and the second conduction end of the unidirectional conduction switch 141 is the cathode of the diode. If the unidirectional conduction switch 141 is a PMOS transistor, the first conduction end of the unidirectional conduction switch 141 is the drain of the PMOS transistor, and the second conduction end of the unidirectional conduction switch 141 is the source of the PMOS transistor. If the unidirectional conduction switch 141 is an NMOS transistor, the first conduction end of the unidirectional conduction switch 141 is the source of the NMOS transistor, and the second conduction end of the unidirectional conduction switch 141 is the drain of the NMOS transistor.

[0058] Optionally, if the unidirectional conduction switch 141 is a diode, when the control unit 12 needs to control the gating module 14 to be in the first conduction mode, the internal path of the first unidirectional transformer unit 142 can be controlled to be disconnected, so that the input end and the output end of the first unidirectional transformer unit 142 cannot be conducted through the internal path. At this time, the current input from the DC input end 11 to the gating module 14 can only flow out of the gating module 14 through the unidirectional conduction switch 141 (at this time, the unidirectional conduction switch 141 is in the on state); when the control unit 12 needs to control the gating module When block 14 is in the second conduction mode, the internal path of the first unidirectional transformer unit 142 can be controlled to be conductive, so that the input and output ends of the first unidirectional transformer unit 142 can be conductive through the internal path. At this time, the current provided by the storage unit 13 can only be reversely transmitted to the DC input terminal 11 through the first unidirectional transformer unit 142 (at this time, the unidirectional conduction switch 141 is in the off state, and due to the unidirectional conduction characteristics of the unidirectional conduction switch 141, the current cannot flow to the DC input terminal 11 through the unidirectional conduction switch 141).

[0059] Optionally, if the unidirectional conduction switch 141 is a MOS transistor, the control output end of the control unit 12 is also electrically connected to the gate of the MOS transistor (not shown in the figure); when the control unit 12 needs to control the gating module 14 to be in the first conduction mode, the internal path of the first unidirectional transformer unit 142 can be controlled to be disconnected, and the MOS transistor can be controlled to be in the conduction state. At this time, the current input from the DC input terminal 11 to the gating module 14 can only flow out of the gating module 14 through the MOS transistor; when the control unit 12 needs to control the gating module 14 to be in the second conduction mode, the internal path of the first unidirectional transformer unit 142 can be controlled to be connected, and the MOS transistor can be controlled to be in the cut-off state. At this time, the current provided by the storage unit 13 can only be reversely transmitted to the DC input terminal 11 through the first unidirectional transformer unit 142.

[0060] Optionally, the first unidirectional voltage transformation unit 142 may be a DC / DC (direct current to direct current) voltage power conversion unit.

[0061] It should be noted that the control unit 12 can also adjust the transformation parameters of the first unidirectional transformation unit 142 by outputting a corresponding control signal to the first unidirectional transformation unit 142, thereby adjusting the voltage converted by the first unidirectional transformation unit 142.

[0062] It should be noted that the scheme in which a first unidirectional transformer unit 142 and a unidirectional conduction switch 141 are arranged in parallel in the selection module 14 is particularly suitable for a scheme in which the electric energy provided by the DC source 20 can directly meet the power supply demand of the load 30; that is, when the selection module 14 is in the first conduction mode, the DC power input from the DC input terminal 11 can be directly transferred to the output unit 15 by the unidirectional conduction switch 141 to be directly used for powering the load 30.

[0063] In one embodiment, based on the above embodiment, the power storage unit 13 is connected to the battery device 10 in a detachable electrical connection manner.

[0064] Optionally, the battery device 10 is provided with multiple first interfaces suitable for inserting the storage unit 13, and the interfaces are provided with first contacts corresponding to the connecting lines of each module and unit in the battery device 10 that need to be electrically connected to the storage unit 13; and the storage unit 13 has a second interface adapted to the first interface, and the second interface is provided with a second contact corresponding to the first contact (the second contact is the contact of the connecting line in the storage unit 13 that needs to be connected to other modules and units of the battery device 10).

[0065] The first interface and the second interface are detachably connected, and when the storage unit 13 is inserted into the battery device 10 through the connection between the second interface and the first interface, the first contact and the second contact are electrically connected, and the storage unit 13 can be detachably electrically connected to the battery device 10. This facilitates the addition, removal, and replacement of storage units 13 in the battery device 10.

[0066] It should be noted that the above-mentioned method of connecting the power storage unit 13 to the battery device 10 in a detachable electrical connection is only an example, and it does not exclude that the power storage unit 13 can be connected to the battery device 10 in other equivalent ways.

[0067] In one embodiment, referring to FIG3 , on the basis of the above embodiment, the battery device 10 further includes a first switch module 16 , wherein the gating module 14 is electrically connected to the output unit 15 via the first switch module 16 ; the input end and the output end of the power storage unit 13 are electrically connected to the two conduction ends of the first switch module 16 , respectively; and the control output end of the control unit 12 is electrically connected to the control end of the first switch module 16 .

[0068] In this embodiment, the first conductive end of the first switch module 16 is electrically connected to the second conductive end of the selection module 14 and the input end of each power storage unit 13; the second conductive end of the first switch module is electrically connected to the output unit 15 and the output end of each power storage unit 13. In addition, the control output end of the control unit 12 is also electrically connected to the control end of the first switch module 16, thereby controlling whether the first switch module 16 is closed or open.

[0069] Optionally, a normally open switch device (such as a normally open contactor, a normally open relay, etc.) is provided in the first switch module 16, so that when the battery device 10 loses power, the first switch module 16 will be disconnected to protect the circuit safety.

[0070] Optionally, during normal operation of the battery device 10, when the DC source 20 supplies power normally so that the DC input terminal 11 has power input, the first switch module 16 is controlled to be in a closed state so that the current input to the DC input terminal 11 can sequentially pass through the selection module 14, the first switch module 16 and the output unit 15 to supply power to the load 30; and when the DC source 20 supplies power abnormally so that the DC input terminal 11 has no power input and the storage unit 13 needs to be enabled to supply power to the load 30, the first switch module 16 can be controlled to be in a disconnected state to prevent the current output by the storage unit 13 from flowing back to the input terminal of the storage unit 13, thereby avoiding current circulation.

[0071] In one embodiment, referring to FIG. 4 , based on the above embodiment, the battery device 10 further includes a second switch module 17 , wherein the DC input terminal 11 is electrically connected to the gating module 14 via the second switch module 17 ; and the control output terminal of the control unit 12 is electrically connected to the control terminal of the second switch module 17 .

[0072] In this embodiment, the first conductive end of the second switch module 17 is electrically connected to the DC input end 11, the second conductive end of the second switch module 17 is electrically connected to the first conductive end of the gating module 14, and the control end of the second switch module 17 is electrically connected to the control output end of the control unit 12.

[0073] Optionally, the second switch module 17 may be provided with a controllable switch tube (such as a MOS tube) or a switch device (such as a contactor, a relay, etc.), and the control unit 12 may control the switch tube and / or the switch device in the second switch module 17 to be turned on or off to control the second switch module 17 to be closed or opened.

[0074] It should be noted that, since the control output terminal of the control unit 12 is electrically connected to the control terminal of the second switch module 17 , the second switch module 17 can be controlled to be closed or opened by outputting a corresponding control signal to the control terminal of the second switch module 17 .

[0075] Optionally, the second switch module 17 can also be a normally open switch device (such as a normally open contactor, a normally open relay, etc.). When the second switch module 17 does not receive the control signal output by the control unit 12, the second switch module 17 remains in the open state; when the second switch module 17 receives the control signal output by the control unit 12, the second switch module 17 remains in the closed state.

[0076] When the second switch module 17 is closed, a path is formed between the first conductive end and the second conductive end of the second switch module 17 ; when the second switch module 17 is opened, a circuit is formed between the first conductive end and the second conductive end of the second switch module 17 .

[0077] Optionally, since the first conductive end of the second switch module 17 is electrically connected to the DC input terminal 11, and the second conductive end of the second switch module 17 is electrically connected to the first conductive end of the gating module 14, when the second switch module 17 is closed, a path is formed between the DC input terminal 11 and the gating module 14, allowing the DC input terminal 11 to supply power to the load 30 through the gating module 14. Conversely, if the second switch module 17 is disconnected, a circuit is formed between the DC input terminal 11 and the gating module 14, and the DC input terminal 11 is unable to supply power to the load 30 through the gating module 14. In particular, when there is no power input at the DC output terminal and the storage unit 13 in the battery device 10 needs to be activated to supply power to the load 30, by controlling the second switch module 17 to be disconnected, the voltage output by the storage unit 13 can be prevented from flowing back to the DC input terminal 11.

[0078] In one embodiment, referring to Figure 5, on the basis of the above embodiment, the power storage unit 13 includes a second unidirectional transformer unit 131, a battery 132 and a third switch module 133, wherein the input end of the second unidirectional transformer unit 131 is the input end of the power storage unit 13, the charging and discharging end of the battery 132 is electrically connected to the output end of the second unidirectional transformer unit 131 and the first conductive end of the third switch module 133, and the second conductive end of the third switch module 133 is the output end of the power storage unit 13.

[0079] In this embodiment, the input end of the second unidirectional transformer unit 131 is the input end of the power storage unit 13, the charging and discharging end of the battery 132 is electrically connected to the output end of the second unidirectional transformer unit 131 and the first conductive end of the third switch module 133, and the second conductive end of the third switch module 133 is the output end of the power storage unit 13.

[0080] Optionally, the third switch module 133 is provided with at least one unidirectional conduction switch (e.g., a diode or MOS transistor), and the current conducting direction of the unidirectional conduction switch is from the battery 132 to the output unit 15. In this way, the current in the third switch module 133 can only flow from the first conduction end of the third switch module 133 to the second conduction end of the third switch module 133. For example, if the unidirectional conduction switch is a diode, the anode of the diode is electrically connected to the charge and discharge terminals of the battery 132, and the cathode is electrically connected to the output unit 15. This ensures that the current conducting direction of the unidirectional conduction switch is from the battery 132 to the output unit 15.

[0081] Among them, if the unidirectional conducting switch is a MOS transistor, the control output end of the control unit 12 can also be electrically connected to the gate of the MOS transistor (not shown in the figure), and by outputting a corresponding control signal to the gate of the MOS transistor, the MOS transistor is controlled to be turned on or off, thereby controlling the unidirectional conducting switch to be closed or opened; if the unidirectional conducting switch is a diode, the unidirectional conducting switch can automatically turn on or off the second switching device by automatically detecting the change in the voltage difference between the anode and the cathode.

[0082] In addition, in other optional schemes, a unidirectional conducting switch and a controllable switch (such as a controllable contactor, a controllable relay, etc.) can be set in parallel in the third switch module 133. By controlling the unidirectional conducting switch and the controllable switch to be disconnected at the same time, the third switch module 133 can be controlled to be disconnected; and as long as any one of the unidirectional conducting switch and the controllable switch is controlled to be closed, the third switch module 133 can be controlled to be closed.

[0083] In addition, in other optional schemes, a unidirectional conduction switch and a controllable switch can be set in series in the third switch module 133. By controlling either the unidirectional conduction switch or the controllable switch to be disconnected, the third switch module 133 can be controlled to be disconnected; by controlling the unidirectional conduction switch and the controllable switch to be closed at the same time, the third switch module 133 can be controlled to be closed.

[0084] Optionally, the current of the second unidirectional transformer unit 131 flows from the input end to the output end of the second unidirectional transformer unit 131. The input end of the second unidirectional transformer unit 131 serves as the input end of the power storage unit 13 and is electrically connected to the second conductive end of the gating module 14; the output end of the second unidirectional transformer unit 131 is electrically connected to the charging and discharging ends of the battery 132.

[0085] Among them, the second unidirectional transformation unit 131 can be a DC / DC (direct current to direct current) voltage power conversion unit, and the second unidirectional transformation unit 131 can be used to convert the received DC voltage into a rated charging voltage adapted to the battery 132, and then output the converted voltage to the battery 132.

[0086] Optionally, the second unidirectional transformer unit 131 can convert the received DC voltage into a rated charging voltage compatible with the battery 132 according to pre-set working parameters; or, the control end of the second unidirectional transformer unit 131 is electrically connected to the control output end of the control unit 12 and is controlled by the control unit 12, so that the control unit 12 can output a corresponding control signal to the second unidirectional transformer unit 131 to set the working parameters of the second unidirectional transformer unit 131, so that the second unidirectional transformer unit 131 can convert the received DC voltage into a corresponding DC voltage according to the charging requirements of the battery 132 (that is, the control unit 12 can adjust the voltage converted by the second unidirectional transformer unit 131 according to the charging requirements).

[0087] It should be noted that the control unit 12 may be provided with a plurality of control output terminals, and may control various components (such as the gating module 14 and / or the second unidirectional transformer unit 131 ) respectively through different control output terminals.

[0088] When the third switch module 133 is closed, a path can be formed between the first conductive end and the second conductive end of the third switch module 133; when the third switch module 133 is opened, a circuit is formed between the first conductive end and the second conductive end of the third switch module 133.

[0089] Optionally, since the first conductive end of the third switch module 133 is electrically connected to the charging and discharging ends of the battery 132, when the third switch module 133 is turned on, a path can be formed between the battery 132 and the second conductive end of the third switch module 133, and the storage unit 13 has a voltage output; conversely, if the third switch module 133 is disconnected, a short circuit is formed between the battery 132 and the second conductive end of the third switch module 133, and the storage unit 13 has no voltage output.

[0090] Optionally, when the DC input terminal 11 can supply power to the load 30 connected to the battery device 10, the third switch module 133 is disconnected and the storage unit 13 has no output; when the DC input terminal 11 cannot meet the power supply requirements of the load 30, the third switch module 133 is turned on, and the storage unit 13 can supply power to the load 30 and / or supply power to other battery devices 10 with insufficient power supply through the DC input terminal 11.

[0091] It should be noted that by utilizing the device characteristics of the unidirectional conduction switch and the second unidirectional transformer unit 131, the charging and discharging of the battery 132 in the storage unit 13 can be controlled in a timely manner. For example, when there is no current input to the DC input terminal 11, the battery 132 in any storage unit 13 is controlled to discharge to the load 30; or when there is current input to the DC input terminal 11 and the battery 132 is not fully charged, the second unidirectional transformer unit 131 can be controlled to use the current input from the DC input terminal 11 to charge the battery 132.

[0092] The present invention further proposes a power supply system for a data center. Referring to FIG6 , the power supply system includes a DC source 20 and a plurality of battery devices 10. The specific structure of the battery device 10 refers to the above embodiment. Since the present power supply system adopts all the technical solutions of all the above embodiments, it has at least all the technical effects brought about by the technical solutions of the above embodiments, which will not be described one by one here.

[0093] The DC input end of each battery device 10 is electrically connected to the DC output end of the DC source 20 ; and the output unit of the battery device 10 is responsible for connecting to the load 30 of the data center.

[0094] The above description is only part or preferred embodiments of the present invention. Neither the text nor the drawings can limit the scope of protection of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the overall concept of the present invention, or direct / indirect application in other related technical fields are included in the scope of protection of the present invention.

Claims

1. A battery device, characterized in that: The battery device includes a DC input terminal, a control unit, a plurality of storage units, a gating module and at least one output unit, wherein the DC input terminal is used to connect to a DC source of a power supply system, and the DC input terminal is electrically connected to an input terminal of each storage unit and the output unit via the gating module, the output terminal of each storage unit is electrically connected to the output unit, and the output unit is used to connect to a load, and a communication terminal and / or a control output terminal of the control unit are electrically connected to the storage unit, the gating module and the output unit; when the battery device inputs electric energy through the DC input terminal, the conduction direction of the gating module is from the DC input terminal to the output unit; when the battery device outputs electric energy through the DC input terminal, the conduction direction of the gating module is from the output unit to the DC input terminal.

2. The battery device according to claim 1, characterized in that: The gating module is a bidirectional voltage transformation unit; Alternatively, the gating module is provided with a unidirectional conduction switch and a first unidirectional transformer unit in parallel, wherein the conduction direction of the unidirectional conduction switch is from the DC input terminal to the output unit, and the conduction direction of the first unidirectional transformer unit is from the output unit to the DC input terminal.

3. The battery device according to claim 2, characterized in that: The unidirectional conducting switch is a diode; Alternatively, the unidirectional conduction switch is a MOS tube, and the control output end of the control unit is also electrically connected to the control end of the MOS tube.

4. The battery device according to claim 1, characterized in that: The power storage unit is connected to the battery device in a detachable electrically connected manner.

5. The battery device according to claim 1, characterized in that: The battery device also includes a first switch module, wherein the selection module is electrically connected to the output unit via the first switch module; the input end and the output end of the power storage unit are electrically connected to the two conduction ends of the first switch module respectively; and the control output end of the control unit is electrically connected to the control end of the first switch module.

6. The battery device according to claim 1, characterized in that: The battery device further comprises a second switch module, wherein the DC input terminal is electrically connected to the gating module via the second switch module; and the control output terminal of the control unit is electrically connected to the control terminal of the second switch module.

7. The battery device according to any one of claims 1 to 6, characterized in that: The power storage unit includes a second unidirectional transformer unit, a battery and a third switch module, wherein the input end of the second unidirectional transformer unit is the input end of the power storage unit, the charging and discharging end of the battery is electrically connected to the output end of the second unidirectional transformer unit and the first conductive end of the third switch module, and the second conductive end of the third switch module is the output end of the power storage unit.

8. A power supply system for a data center, characterized in that: The power supply system comprises a DC source and a plurality of battery devices, wherein the battery device is the battery device according to any one of claims 1 to 7, and the DC source is electrically connected to a DC input terminal of the battery device.

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