Battery device management method and battery device

Abstract

The present application relates to energy storage technology, and discloses a battery device management method. The method comprises: detecting whether a direct current source of a power supply system normally supplies power; if yes, controlling the current flow direction of a gating module of a battery device to be a direction from a direct current input end to an output unit, so that the electric energy input into the direct current input end by the direct current source supplies power to a load sequentially by means of the gating module and the output unit; and if not, starting power storage units in the battery device to supply power to the load by means of the output unit. The present application further discloses a battery device. According to the present application, a battery device is arranged in a distributed manner in the power supply system, and controllable charging and discharging management is carried out on the battery device according to the power supply condition of the power supply system so as to achieve the safety and stability of power supply to the load.

Description

Battery device management method and battery device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on August 17, 2023, with application number 202311038669.5 and application name: "Battery device management method and battery device", the entire content of which is incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of energy storage technology, and in particular to a battery device management method and a battery device. 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 this application and does not constitute an admission that the above content is prior art.

[0006] Summary of the Invention

[0007] The main purpose of this application is to provide a battery device management method and a battery device, aiming to propose a battery device that is easy to be distributed in the power supply system, and to perform controllable charging and discharging management of the battery device according to the power supply conditions of the power supply system to meet the safety and stability of power supply to the load.

[0008] To achieve the above objectives, the present application provides a management method for a battery device, wherein the battery device includes a DC input terminal, a control unit, multiple storage cells, 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 the input terminal of each storage cell and the output unit via the gating module, and the output terminal of each storage cell is electrically connected to the output unit, and the output unit is used to connect to a load and monitor the load status; the control unit is used to monitor and control the battery device and is responsible for the management of the battery device; the management method of the battery device includes:

[0009] Check whether the DC source of the power supply system is supplying power normally;

[0010] If so, the current direction of the gating module of the control battery device is from the DC input end to the output unit, so that the electric energy input from the DC source to the DC input end is sequentially supplied to the load through the gating module and the output unit;

[0011] If not, the power storage unit in the battery device is enabled to supply power to the load via the output unit.

[0012] Optionally, the gating module is a bidirectional transformer unit;

[0013] Alternatively, the gating module is provided with a unidirectional conduction switch and a 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 unidirectional transformer unit is from the output unit to the DC input end.

[0014] Optionally, after the step of detecting whether the DC source of the power supply system is supplying power normally, the method further includes:

[0015] When the DC source supplies power abnormally, and when it is detected that other battery devices connected to the DC source are underpowered, the current flow direction of the gating module of the local battery device is controlled to be from the output unit to the DC input end, so that the storage unit in the local battery device can be used to power other battery devices.

[0016] Optionally, after the step of detecting whether the DC source of the power supply system is supplying power normally, the method further includes:

[0017] When the DC source power supply is abnormal and the control unit detects that the total storage capacity of the local battery device cannot meet the load power supply demand, the current flow direction of the selection module of the local battery device is controlled to be from the DC input end to the output unit, so that the local battery device receives the power input from other battery devices connected to the DC source.

[0018] Optionally, the battery device management method further includes:

[0019] After the local battery device receives electric energy input from other battery devices, if the local battery device has a first storage unit with a storage capacity greater than a power threshold, the electric energy input from the other battery devices and the electric energy provided by the first storage unit are used to jointly supply power to the load; if the storage capacity of the storage units in the local battery device is less than the power threshold, the electric energy input from the other battery devices is used to supply power to the load.

[0020] Optionally, the step of enabling the power storage unit in the battery device to supply power to the load via the output unit includes:

[0021] According to the storage capacity of the power storage unit monitored by the control unit, the power storage unit with a storage capacity greater than a power threshold is used as a first power storage unit, and the first power storage unit is enabled to supply power to the load via the output unit.

[0022] Optionally, the battery device management method further includes:

[0023] According to the storage capacity of the power storage unit monitored by the control unit, the power storage unit whose storage capacity is less than a power threshold is used as a second power storage unit, and the first power storage unit is used to charge the second power storage unit.

[0024] Optionally, after the step of detecting whether the DC source of the power supply system is supplying power normally, the method further includes:

[0025] When it is detected that the DC source is supplying power normally, the electric energy input from the DC source to the DC input terminal is used to charge the power storage unit via the gating module.

[0026] Optionally, the power storage unit is connected to the battery device in a detachable electrical connection manner; and the battery device management method further includes:

[0027] When the DC source power supply is abnormal, and the control unit detects that the total storage capacity of the local battery device cannot meet the load power supply demand, and other battery devices connected to the DC source have no surplus power, the control unit generates a prompt message to prompt the user to insert more storage units into the local battery device, or to prompt the user to replace the storage units in the local battery device.

[0028] To achieve the above-mentioned purpose, the present application also provides 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 and the output unit of each storage unit through the gating module, and 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 monitor the load status; the control unit is used to monitor and control the battery device and is responsible for the management of the battery device; the control unit also includes a memory, a processor and a battery device management program stored in the memory and runable on the processor, and when the battery device management program is executed by the processor, the steps of the above-mentioned battery device management method are implemented.

[0029] The battery device management method and battery device provided in the present application, based on the battery device that is easy to be distributed in the power supply system, perform controllable charging and discharging management of the battery device according to the power supply situation of the power supply system to meet the safety and stability of power supply to the load. When the power supply system loses external energy supply, the distributed battery devices can continue to maintain the normal operation of the load while avoiding the risk of high-temperature fire caused by the centralized installation of the battery devices. Even if any battery device fails, it will not affect the other battery devices from continuing 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 needs of the load to which it is connected 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG1 is a schematic block diagram of the structure of a battery device according to an embodiment of the present application;

[0031] FIG2 is a schematic block diagram of the structure of a power supply system according to an embodiment of the present application;

[0032] FIG3 is another schematic block diagram of the structure of a battery device according to an embodiment of the present application;

[0033] FIG4 is a schematic diagram of steps of a method for managing a battery device according to an embodiment of the present application.

[0034] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limiting the present application. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making any creative efforts shall fall within the scope of protection of the present application.

[0036] In addition, if the descriptions of "first", "second", etc. are involved in this application, they are only used for descriptive purposes (such as to distinguish the same or similar elements) and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. 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 they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0037] 1 , in one embodiment, 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 access 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 via the gating module 14, and the output terminal of each storage cell 13 is electrically connected to the output unit 15, and the output unit 15 is used to access a load 30 and monitor the status of the load 30; the control unit 12 is used to monitor and control the battery device 10 and is responsible for the management of the battery device 10.

[0038] In this embodiment, the power supply system may be a power supply system of a data center.

[0039] 2 , 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 data center's load 30, which is then output to each battery device 10.

[0040] 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 .

[0041] It should be noted that 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.

[0042] 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.

[0043] Optionally, the control unit 12 is used to monitor and control the battery device 10 and is responsible for the management of the battery device 10; 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 battery power of each power storage unit 13, the current of any circuit in the battery device 10, etc.

[0044] 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.

[0045] 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 .

[0046] 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.

[0047] 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 .

[0048] 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.

[0049] 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.

[0050] Optionally, the gating module 14 can be a bidirectional transformer unit, which can be a DC / DC (direct current to direct current) voltage power conversion unit, and the bidirectional transformer unit is a bidirectional conducting device. When the bidirectional transformer unit is in the first conduction mode, the current flow direction of the gating module 14 is from the DC input terminal 11 to the output unit 15; when the bidirectional transformer unit is in the second conduction mode, the current flow direction of the gating module 14 is from the output unit 15 to the DC input terminal 11.

[0051] Optionally, if the bidirectional transformer unit 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.

[0052] Optionally, if the bidirectional transformer unit 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 can be 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.

[0053] It should be noted that, in addition to controlling the bidirectional transformer unit 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.

[0054] It should be noted that the scheme in which the selection module 14 is a bidirectional transformer unit is particularly suitable for a scheme in which the electric energy provided by the DC source 20 cannot directly meet the power supply requirements of the load 30; that is, when the selection module 14 is in the first conduction mode, the bidirectional transformer unit can be used to step up / down the DC power input from the DC input terminal 11 to obtain a second voltage that meets the power supply requirements of the load 30.

[0055] Alternatively, referring to Figure 3, a unidirectional transformer unit 142 and a unidirectional conduction switch 141 are arranged in parallel in the selection module 14; wherein, the first conduction end of the unidirectional conduction switch 141 is electrically connected to the output end of the unidirectional transformer unit 142, the second conduction end of the unidirectional conduction switch 141 is electrically connected to the input end of the unidirectional transformer unit 142, and the control end of the unidirectional transformer unit 142 is electrically connected to the control output end of the control unit 12.

[0056] Optionally, the internal current of the unidirectional conducting switch 141 can only flow from the first conducting end of the unidirectional conducting switch 141 to the second conducting end of the unidirectional conducting switch 141, and the first conducting end of the unidirectional conducting switch 141 is electrically connected to the DC input end 11, and the second conducting end is electrically connected to the output unit 15, so that the current conduction direction of the unidirectional conducting switch 141 is from the DC input end 11 to the output unit 15; the internal current of the unidirectional transformer unit 142 can only flow from the input end of the unidirectional transformer unit 142 to the output end of the 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 unidirectional transformer unit 142 is from the output end to the DC input end 11.

[0057] Moreover, since the first conductive end of the unidirectional conducting switch 141 is electrically connected to the output end of the unidirectional transformer unit 142, and the second conductive end of the unidirectional conducting switch 141 is electrically connected to the input end of the unidirectional transformer unit 142, the unidirectional conducting switch 141 and the unidirectional transformer unit 142 are equivalent to being arranged in parallel in the selection module 14.

[0058] Optionally, the control end of the 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 connection or disconnection of the line between the input end and the output end of the unidirectional transformer unit 142 in the internal circuit of the unidirectional transformer unit 142 by outputting a corresponding control signal to the control end of the unidirectional transformer unit 142.

[0059] 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.

[0060] 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 unidirectional transformer unit 142 can be controlled to be disconnected, so that the input and output ends of the unidirectional transformer unit 142 cannot be conducted through the internal path. 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 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 When the module 14 is in the second conduction mode, the internal path of the unidirectional transformer unit 142 can be controlled to be conductive, so that the input and output ends of the 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 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).

[0061] 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 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 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 unidirectional transformer unit 142.

[0062] Optionally, the unidirectional voltage conversion unit 142 may be a DC / DC (direct current to direct current) voltage power conversion unit.

[0063] It should be noted that the control unit 12 can also output a corresponding control signal to the unidirectional transformer unit 142 to adjust the transformation parameters of the unidirectional transformer unit 142, thereby adjusting the voltage converted by the unidirectional transformer unit 142.

[0064] It should be noted that the solution in which a unidirectional transformer unit 142 and a unidirectional conduction switch 141 are arranged in parallel in the selection module 14 is particularly suitable for a solution 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.

[0065] In one embodiment, referring to FIG. 4 , the battery device management method includes:

[0066] Step S10: Detect whether the DC source of the power supply system is supplying power normally;

[0067] Step S20: If yes, control the current flow direction of the gating module of the battery device from the DC input end to the output unit, so that the electric energy input from the DC source to the DC input end sequentially passes through the gating module and the output unit to supply power to the load;

[0068] Step S30: If not, enable the power storage unit in the battery device to supply power to the load via the output unit.

[0069] In this embodiment, during the operation of the battery device, it is possible to monitor in real time or periodically whether the DC source connected to the DC input terminal has power input, so as to detect whether the DC source is supplying power normally (for example, if there is power input, it means that the power supply is normal; if there is no power input, it means that the power supply is abnormal).

[0070] Alternatively, the DC source may be detected to determine whether the voltage supplied by the DC source is less than a preset voltage, thereby detecting whether the DC source is abnormally supplying power. If the voltage supplied by the DC source is less than the preset voltage, the DC source is determined to be abnormally supplying power; if the voltage supplied by the DC source is greater than or equal to the preset voltage, the DC source is determined to be normal.

[0071] It should be noted that, generally speaking, when the external energy source connected to the power supply system loses power or a power failure occurs, the DC source will cause abnormal power supply; on the contrary, when the external energy input is normal, the DC source can also supply power normally.

[0072] Of course, the control unit can also learn whether the external power supply is normal through external communication or DI (Digital input) input, so as to judge whether the DC source is supplying power normally.

[0073] Optionally, if it is detected that the DC source is supplying power normally, indicating that the DC input terminal can normally input power, the control unit can control the gating module to be in the first conduction mode, so that the current conduction direction of the gating module is from the DC input terminal to the output unit. In this way, the DC power input from the DC input terminal can flow through the gating module and the output unit in sequence, and then be delivered by the output unit to the load to power the load.

[0074] At this time, if any of the multiple storage units connected in parallel in the battery device is not fully charged, the DC power input from the DC input terminal can also be used to charge the storage unit via the gating module.

[0075] Optionally, if an abnormal power supply from the DC source is detected, indicating that the DC input terminal cannot input electrical energy normally, the control unit may enable at least one storage unit in the battery device to power the load, and control the enabled storage unit to discharge to the output unit, so that the output unit outputs the received electrical energy to the load to maintain uninterrupted operation of the load.

[0076] In one embodiment, based on the proposed battery device that is convenient for distributed installation in the power supply system, the battery device is controlled to manage charging and discharging according to the power supply status of the power supply system to ensure the safety and stability of power supply to the load. When the power supply system loses external energy supply, the distributed battery device can continue to maintain the normal operation of the load while avoiding the risk of high-temperature fire caused by the centralized installation of the battery device. Even if any battery device fails, it will not affect the other battery devices from continuing to power the load. Moreover, by providing 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 needs of the load to which it is connected 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.

[0077] In one embodiment, based on the above embodiment, after the step of detecting whether the DC source of the power supply system is supplying power normally, the method further includes:

[0078] When the DC source supplies power abnormally, and when it is detected that other battery devices connected to the DC source are underpowered, the current flow direction of the gating module of the local battery device is controlled to be from the output unit to the DC input end, so that the storage unit in the local battery device can be used to power other battery devices.

[0079] In this embodiment, when the DC source is supplying power abnormally, if the power supply of other battery devices connected to the DC source is insufficient (e.g., the power storage capacity is insufficient to meet the power supply requirements of the connected loads), the other battery devices may send power shortage information to the control unit of the local battery device. Thus, when the control unit of the local battery device receives the power shortage information of the other battery devices, it may first detect whether the total power storage capacity of the local battery device (i.e., the sum of the power storage capacity of all the power storage units) can meet the power supply requirements of the loads connected to the local battery device. If it can (or if it is detected that the local battery device currently does not need to supply power to the load or no load is connected), the control unit of the local battery device may control the gating module to switch to the second conduction mode, so that the current conduction direction of the gating module is switched from the DC input end to the output unit. In this way, the power storage units in the local battery device can sequentially pass through the gating module and the DC output end to reversely supply power to the DC output end of the DC source. The DC source then transfers the current provided by the local battery device to the other battery devices with insufficient power. In this way, the other battery devices with insufficient power can obtain power from the DC output end of the DC source to supplement the insufficient power.

[0080] In this way, the power among the battery devices in the power supply system 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, avoiding any load power shortage, and maximizing the energy storage characteristics of the battery devices, further improving the reliability and safety of the power supply to the loads.

[0081] In one embodiment, based on the above embodiment, after the step of detecting whether the DC source of the power supply system is supplying power normally, the method further includes:

[0082] When an abnormality in the DC source power supply is detected, and when the control unit detects that the total storage capacity of the local battery device cannot meet the load power supply demand, the current flow direction of the selection module of the local battery device is controlled to be from the DC input end to the output unit, so that the local battery device receives the power input from other battery devices connected to the DC source.

[0083] In this embodiment, when the DC source supplies power abnormally, if the control unit of the local battery device detects that the total storage capacity of the local battery device cannot meet the power supply demand of the load (for example, the total storage capacity is less than the required capacity), the control unit can send power shortage information to the control units of other battery devices, and control the gating module to be in the first conduction mode, so that the current conduction direction of the gating module is switched to the direction from the output unit to the DC input end. In this way, when the control units of other battery devices receive the power shortage information of the local battery device, if the other battery devices do not need to supply power to the load or the total storage capacity of the other battery devices is sufficient to meet the power supply demand of the load (that is, the other battery devices have surplus power), the other battery devices can supply power to the DC output end of the DC source, and the DC source transfers the current provided by the other battery devices to the local battery device. In this way, the local battery device can obtain the electric energy transferred by the other battery devices through the DC source from the DC output end of the power supply system to make up for the insufficient power supply of the local battery device.

[0084] In this way, when the power supply of the battery device cannot meet the power supply demand of the load it is connected to, the battery device can also 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 battery device has surplus power, it can also supply power to other battery devices with insufficient power supply). In this way, the power among the battery devices can be reasonably allocated, thereby ensuring that the battery devices in the power supply system can meet the power supply demand of the corresponding load and avoiding the occurrence of insufficient power supply to any load.

[0085] In one embodiment, based on the above embodiment, the battery device management method further includes:

[0086] After the local battery device receives electric energy input from other battery devices, if the local battery device has a first storage unit with a storage capacity greater than a power threshold, the electric energy input from the other battery devices and the electric energy provided by the first storage unit are used to jointly supply power to the load; if the storage capacity of the storage units in the local battery device is less than the power threshold, the electric energy input from the other battery devices is used to supply power to the load.

[0087] In this embodiment, the control unit in the local battery device can monitor the power storage capacity of each storage unit in real time or periodically, and mark the storage unit with a power storage capacity greater than the power storage capacity threshold as the first storage unit, and mark the storage unit with a power storage capacity less than the power storage capacity threshold as the second storage unit.

[0088] The power threshold can be set according to actual needs, such as 10%-30% of the total power of a single storage unit.

[0089] Optionally, when the DC source power supply is abnormal and the total storage capacity of the battery device at this end cannot meet the power supply demand of the load, the control unit can send insufficient power supply information to the control units of other battery devices, and control the selection module to be in the first conduction mode, so that the current conduction direction of the selection module is switched from the output unit to the DC input end. In this way, when the control units of other battery devices receive the insufficient power supply information of the battery device at this end, the other battery devices can supply power to the DC output end of the DC source, and the DC source transfers the current provided by other battery devices to the battery device at this end.

[0090] At this time, while the local battery device receives power provided by other battery devices, if the local battery device also has a first power storage unit, the power input from other battery devices and the power output from the first power storage unit can be used to jointly supply power to the load. While ensuring stable operation of the load, the power required by the local battery device from other battery devices can be minimized.

[0091] In one embodiment, based on the above embodiment, the step of enabling the power storage unit in the battery device to supply power to the load via the output unit includes:

[0092] According to the storage capacity of the power storage unit monitored by the control unit, the power storage unit with a storage capacity greater than a power threshold is used as a first power storage unit, and the first power storage unit is enabled to supply power to the load via the output unit.

[0093] In this embodiment, the control unit can monitor the storage capacity of each storage unit in real time or periodically, and mark the storage unit with a storage capacity greater than the storage capacity threshold as the first storage unit, and mark the storage unit with a storage capacity less than the storage capacity threshold as the second storage unit.

[0094] Optionally, when the DC source power supply is abnormal, if the control unit of the local battery device detects that the total storage capacity of the local battery device has surplus power beyond the power supply demand of the load, then only the first storage unit with sufficient storage capacity in the local battery device can be enabled to power the load, and the second storage unit with too low storage capacity can be avoided to power the load, thereby avoiding over-discharge of the second storage unit, which can extend the service life of the storage.

[0095] In addition, in some optional schemes, while the battery device enables the first storage unit at this end to supply power to the load, the electric energy output by the first storage unit can also be used to charge the second storage unit at the same time, until the storage capacity (or output voltage) of all storage units in the battery device is equal (or approximately equal). At this time, all storage units are used to supply power to the load together, thereby achieving balanced discharge of multiple parallel storage units, which can correspondingly extend the discharge time of the battery device, that is, extend the time for maintaining stable operation of the load.

[0096] In one embodiment, based on the above embodiment, the power storage unit is connected to the battery device in a detachable electrical connection manner; and the battery device management method further includes:

[0097] When an abnormal power supply of the DC source is detected, and when the control unit detects that the total storage capacity of the local battery device cannot meet the power supply demand of the load, and when other battery devices connected to the DC source have no surplus power, the control unit generates a prompt message to prompt the user to insert more storage units into the local battery device, or to prompt the user to replace the storage units in the local battery device.

[0098] In this embodiment, the battery device is provided with a plurality of first interfaces suitable for inserting storage units, and the interfaces are provided with first contacts corresponding to the connecting lines of each module and unit in the battery device that need to be electrically connected to the storage unit; and the storage unit 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 that needs to be connected to other modules and units of the battery device in the storage unit).

[0099] The first interface and the second interface are detachably connected. When the storage unit is inserted into the battery device 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 is detachably connected to the battery device. This facilitates the addition, removal, and replacement of storage units in the battery device.

[0100] It should be noted that the above-mentioned method of connecting the power storage unit to the battery device in a detachable electrical connection manner is only an example, and it does not exclude that the power storage unit can also be connected to the battery device in other equivalent ways.

[0101] Optionally, when the DC source power supply is abnormal and the total storage capacity of the local battery device cannot meet the power supply demand of the load, and when the local battery device receives insufficient power supply information sent by all other battery devices in the power supply system, it can be determined that other battery devices have no surplus power. At this time, the control unit can generate a prompt message, which is used to prompt the user to insert more storage units into the local battery device, or prompt the user to replace the storage units in the local battery device.

[0102] Among them, if the power supply device or battery device is provided with a display screen for displaying the battery status, the control unit can output the prompt information to the display screen; or the control unit can send the prompt information to an associated device that the user has pre-entered into the system.

[0103] In this way, after viewing the prompt information, the user can promptly insert more storage units with high storage capacity into the battery device, or use storage units with high storage capacity to replace storage units with too low storage capacity in the battery device.

[0104] It should be noted that, since the power storage units in the battery device of the present application can be connected to the battery device in a detachable electrical connection manner, it is very convenient for users to replace or add or remove power storage units in the battery device.

[0105] Referring to Figure 1 , an embodiment of the present application also provides a battery device 10. The battery device 10 includes a DC input terminal 11, a control unit 12, multiple storage cells 13, a gating module 14, and at least one output unit 15. The DC input terminal 11 is used to connect to a DC source 20 of a power supply system. The DC input terminal 11 is electrically connected to the input terminal of each storage cell 13 and the output unit 15 via the gating module 14. The output terminal of each storage cell 13 is electrically connected to the output unit 15. The output unit 15 is used to connect to a load 30 and monitor the status of the load 30. The control unit 12 is used to monitor and control the battery device 10 and is responsible for managing the battery device 10. The control unit 12 includes a processor, memory, a communication interface, and a database connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operating system and computer programs stored in the non-volatile storage medium. The database is used to store a battery device management program. The communication interface is used to communicate data with an external terminal. The input device is used to receive signals input by an external device. When the computer program is executed by the processor, it implements a battery device management method as described in the above embodiment.

[0106] Those skilled in the art will understand that the structure shown in FIG1 is merely a block diagram of a portion of the structure related to the solution of the present application, and does not constitute a limitation on the battery device 10 to which the solution of the present application is applied.

[0107] In summary, the battery device management method and battery device provided in the embodiments of the present application, based on the battery device that is easy to be distributed in the power supply system, perform controllable charge and discharge management of the battery device according to the power supply situation of the power supply system to meet the safety and stability of power supply to the load, so that when the power supply system loses external energy supply, the distributed battery device can continue to maintain the normal operation of the load while avoiding the risk of high temperature fire caused by the centralized setting of the battery device. 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 load to which it is connected 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.

[0108] Those skilled in the art will understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media provided in this application and used in the embodiments may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (SSRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct RAMbus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM).

[0109] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, apparatus, article, or method comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, apparatus, article, or method. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, apparatus, article, or method comprising the element.

[0110] The above description is only a preferred embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for managing a battery device, characterized in that: The battery device comprises a DC input terminal, a control unit, a plurality of power storage units, a gating module and at least one output unit, wherein the DC input terminal is used to access a DC source of a power supply system, and the DC input terminal is electrically connected to an input terminal of each power storage unit and the output unit via the gating module, and the output terminal of each power storage unit is electrically connected to the output unit, and the output unit is used to access a load and monitor a load state; the control unit is used to monitor and control the battery device and is responsible for the management of the battery device; the management method of the battery device comprises: Check whether the DC source of the power supply system is supplying power normally; If so, the current flow direction of the gating module of the control battery device is from the DC input end to the output unit, so that the electric energy input from the DC source to the DC input end is sequentially supplied to the load through the gating module and the output unit; If not, the power storage unit in the battery device is enabled to supply power to the load via the output unit.

2. The battery device management method 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 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 unidirectional transformer unit is from the output unit to the DC input end.

3. The battery device management method according to claim 1 or 2, characterized in that: After the step of detecting whether the DC source of the power supply system is supplying power normally, the method further includes: When the DC source is supplying power abnormally, and when it is detected that other battery devices connected to the DC source are underpowered, the current flow direction of the gating module of the local battery device is controlled from the output unit to the DC input terminal, so that the storage unit in the local battery device can be used to power other battery devices.

4. The battery device management method according to claim 1 or 2, characterized in that: After the step of detecting whether the DC source of the power supply system is supplying power normally, the method further includes: When the DC source is abnormal, and the control unit detects that the local battery device When the total storage capacity cannot meet the load power supply demand, the current flow direction of the gating module of the local battery device is controlled to be from the DC input end to the output unit, so that the local battery device receives the power input from other battery devices connected to the DC source.

5. The battery device management method according to claim 4, characterized in that: The battery device management method further includes: After the local battery device receives electric energy input from other battery devices, if the local battery device has a first power storage unit with a storage capacity greater than a power threshold, the electric energy input from other battery devices and the electric energy provided by the first power storage unit are used to jointly supply power to the load; if the storage capacities of the power storage units in the local battery device are all less than the power threshold, the electric energy input from other battery devices is used to supply power to the load.

6. The battery device management method according to claim 1 or 2, characterized in that: The step of enabling the power storage unit in the battery device to supply power to the load via the output unit comprises: According to the power storage amount of the power storage unit monitored by the control unit, the power storage unit with a power storage amount greater than a power threshold is used as a first power storage unit, and the first power storage unit is enabled to supply power to a load via an output unit.

7. The battery device management method according to claim 6, characterized in that: The battery device management method further includes: According to the power storage amount of the power storage unit monitored by the control unit, the power storage unit whose power storage amount is less than a power threshold is used as a second power storage unit, and the first power storage unit is used to charge the second power storage unit.

8. The battery device management method according to claim 1 or 2, characterized in that: After the step of detecting whether the DC source of the power supply system is supplying power normally, the method further includes: When it is detected that the DC source is supplying power normally, the electric energy input from the DC source to the DC input terminal is used to charge the power storage unit via the gating module.

9. The battery device management method according to claim 1 or 2, characterized in that: The power storage unit is connected to the battery device in a detachable electrical connection manner; The battery device management method further includes: When the DC source power supply is abnormal, and the control unit detects that the total storage capacity of the local battery device cannot meet the load power supply demand, and other battery devices connected to the DC source have no surplus power, the control unit generates a prompt message to prompt the user to insert more storage units into the local battery device, or to prompt the user to replace the storage units in the local battery device.

10. A battery device, characterized in that: The battery device includes a DC input terminal, a control unit, a plurality of storage cells, 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 cell and the output unit via the gating module, and the output terminal of each storage cell is electrically connected to the output unit, and the output unit is used to connect to a load and monitor the load status; the control unit is used to monitor and control the battery device and is responsible for the management of the battery device; the control unit also includes a memory, a processor and a management program of the battery device stored in the memory and executable on the processor, and when the management program of the battery device is executed by the processor, the steps of the management method of the battery device as described in any one of claims 1 to 9 are implemented.

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