CN112787356A

CN112787356A - Discharge device, system, method and storage medium

Info

Publication number: CN112787356A
Application number: CN201911096319.8A
Authority: CN
Inventors: 鞠昌斌; 刘水旺; 赵峥; 沈烨烨
Original assignee: Alibaba Group Holding Ltd
Current assignee: Alibaba Group Holding Ltd
Priority date: 2019-11-11
Filing date: 2019-11-11
Publication date: 2021-05-11
Anticipated expiration: 2039-11-11
Also published as: CN112787356B

Abstract

The embodiment of the application provides a discharge device, a system, a method and a storage medium. In this application embodiment, in the in-process of discharging to the energy storage equipment in the system of being equipped with electricity, form the return circuit that discharges between the input of being equipped with the electricity system with discharge device electrical connection and the energy storage device that needs the off-line to discharge, can merge the electric quantity of energy storage device in the period of discharging into the system of being equipped with electricity for the powered device power supply, this energy storage device still can play the effect of being equipped with electricity for the powered device in the discharge process of energy storage device, can realize emergent discharge, the extension is equipped with the electricity time, fully guarantee the power consumption safety of powered device.

Description

Discharge device, system, method and storage medium

Technical Field

The present disclosure relates to the field of battery technologies, and in particular, to a discharging device, a discharging system, a discharging method, and a storage medium.

Background

In various power supply systems, a battery plays an extremely important role as a backup power source in the power supply system. However, before the battery life is reached, its capacity can drop significantly for a variety of reasons. This requires that the battery be periodically checked for health by discharging the battery.

At present, the health state of the storage battery is generally checked by adopting an online discharging mode. The online discharge is coupled with an application system, and in order to ensure the safety of the system, the discharge depth cannot be hundreds, and the aim of health check cannot be really achieved.

Disclosure of Invention

Various aspects of the present application provide a discharging apparatus, a discharging system, a discharging method, and a storage medium, which can ensure the power consumption safety of a powered device, and can sufficiently perform a checkup discharge on a storage battery to achieve the purpose of health check.

An embodiment of the present application provides a discharge device, including: a grid-connected converter; in the process of discharging a target energy storage device in a standby power system, the grid-connected converter can be electrically connected between the input end of the standby power system and the target energy storage device to form a discharge loop, and the electric quantity of the target energy storage device during the discharge period is merged into the standby power system to supply power to a powered device; wherein the target energy storage device is one or more energy storage devices in the backup power system.

An embodiment of the present application further provides a power supply system, including: the system comprises a main power supply system, a standby power system and a discharging device; the output end of the main power supply system is electrically connected with the input end of the standby power system, and power is supplied to the power receiving equipment through the standby power system; the standby power system comprises at least one energy storage device and is used for providing standby power for the powered equipment; in the process of discharging a target energy storage device, the discharging device is electrically connected between the target energy storage device and the input end of the standby power system to form a discharging loop, and the electric quantity of the target energy storage device during the discharging process is merged into the standby power system to supply power to the powered device; wherein the target energy storage device is one or more of the at least one energy storage device.

An embodiment of the present application further provides a discharging method, including: determining a target energy storage device needing to be discharged from at least one energy storage device contained in the standby power system; electrically connecting a discharge device between the input end of the standby power system and the target energy storage device to form a discharge loop; and the electric quantity of the target energy storage device during the discharge is incorporated into the standby power system through the discharge loop to supply power to the powered equipment.

Embodiments of the present application further provide a computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to implement the steps in the discharging method provided by the embodiments of the present application.

An embodiment of the present application further provides a power supply system of a data center, including: the at least one power supply system is used for supplying power to at least one load of the data center; the at least one path of power supply system comprises a first power supply system; the first power supply system includes: the system comprises a main power supply system, a standby power system and a discharging device; the output end of the main power supply system is electrically connected with the input end of the standby power system, and the standby power system supplies power to one corresponding load; the standby power system comprises at least one energy storage device and provides a standby power supply for one path of corresponding load; in the process of discharging a target energy storage device, the discharging device is electrically connected between the target energy storage device and the input end of the standby power system to form a discharging loop, and the electric quantity of the target energy storage device during the discharging period is merged into the standby power system to supply power for one corresponding load; wherein the target energy storage device is one or more of the at least one energy storage device.

In this application embodiment, in the in-process of discharging to the energy memory in the system of being equipped with electricity, form the return circuit that discharges between the input of the system of being equipped with electricity and the energy memory that needs to discharge with discharge device electrical connection, can incorporate the electric quantity of energy memory during discharging into the system of being equipped with electricity for the powered device power supply, this energy memory still can play the effect of being equipped with electricity for the powered device in the energy memory discharge process, can realize emergent discharge, the extension is equipped with the electric time, fully guarantee the power consumption safety of powered device.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1a is a schematic structural diagram of a power supply system 100 according to an exemplary embodiment of the present disclosure;

fig. 1b is a schematic structural diagram of a power supply system 100 according to an exemplary embodiment of the present disclosure;

fig. 1c is a schematic diagram of another structure of a power supply system 100 according to an exemplary embodiment of the present disclosure;

fig. 1d is a schematic structural diagram of a power supply system 100 according to an exemplary embodiment of the present disclosure;

fig. 1e is a schematic structural diagram of a power supply system 100 according to an exemplary embodiment of the present disclosure;

fig. 1f is a schematic structural diagram of a power supply system 100 according to an exemplary embodiment of the present disclosure;

FIG. 1g is a latching relationship state machine between switches Q1, Q2 as provided in an exemplary embodiment of the present application;

fig. 1h is a schematic structural diagram of a power supply system with HVDC power backup according to an exemplary embodiment of the present application;

fig. 2a is a schematic structural diagram of a grid-connected switch according to an exemplary embodiment of the present disclosure;

fig. 2b is a schematic structural diagram of another grid-connected switch provided in an exemplary embodiment of the present application;

fig. 3a is a schematic structural diagram of a power supply system 300 according to an exemplary embodiment of the present disclosure;

fig. 3b is another schematic structural diagram of a power supply system 300 according to an exemplary embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a power supply system of a data center according to an exemplary embodiment of the present application;

fig. 5 is a schematic flowchart of a discharging method according to an exemplary embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the prior art, the health state of the storage battery is generally checked by adopting an online discharge mode, but the technical problems that the discharge depth cannot be hundreds, the purpose of health check cannot be really achieved and the like exist. To prior art problem, in this application some embodiments, in the in-process of discharging to the energy memory in the system of being equipped with electricity, form the return circuit that discharges between the input of system of being equipped with electricity and the energy memory that needs the off-line to discharge with discharge device electrical connection, can merge the electric quantity of energy memory in the period of discharging into the system of being equipped with electricity and supply power for the powered device, energy memory still can play the effect of being equipped with electricity for the powered device in the energy memory discharge process, can realize emergent discharge, the extension is equipped with the electricity time, fully guarantee the power consumption safety of powered device.

The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Fig. 1a is a schematic structural diagram of a power supply system 100 according to an exemplary embodiment of the present disclosure. The power supply system 100 of the present embodiment is a power supply system with backup power, and as shown in fig. 1a, the power supply system 100 includes: a main power supply system 101, a backup power system 102, and a discharge device 103.

The main power supply system 101 is a main power supply system of the power supply system 100, and the power receiving apparatus 104 is normally supplied with power from the main power supply system 101. The backup power supply system 102 is a backup power supply system of the power supply system 100, and is mainly used for supplying power to the powered device 104 when the main power supply system 101 cannot supply power to or no longer supplies power to the powered device 104.

The device configuration of the power receiving device 104 varies depending on the power supply scenario of the power supply system 100. In the present embodiment, the power receiving apparatus is broadly defined, and any apparatus, system, load, or the like that can obtain power from the power supply system 100 may be used as the power receiving apparatus in the embodiments of the present application.

In this embodiment, the standby power system 102 includes at least one energy storage device 105 for providing a standby power for the powered device 104. The energy storage device 105 is mainly a device capable of storing electric energy and discharging to power the powered device when needed. Energy storage device 105 may be a battery or a battery pack, but is not so limited. The battery pack may include one battery, or a plurality of batteries. In the case where the battery pack includes a plurality of secondary batteries, the plurality of secondary batteries are connected in series. Plural here means two or more.

In this embodiment, the output terminal of the main power supply system 101 is electrically connected to the input terminal of the standby power system 102, and the power receiving device 104 is supplied with power through the standby power system 102. In this way, the standby power system 102 may sense whether the primary power supply system 101 successfully supplies power to the powered device 104, and activate all or part of the energy storage device 105 to supply power to the powered device 104 when sensing that the primary power supply system 101 cannot supply power to or no longer supplies power to the powered device 104.

In this embodiment, the standby power system 102 includes a power bus, and the power supply current provided by the main power supply system 101 is transmitted to the powered device 104 through the power bus. The energy storage device 105 in the backup power system 102 is connected to the power bus as a backup power source to provide emergency power for the powered device 104 when the main power system 101 cannot or can no longer provide power for the powered device 104.

The energy storage device 105 in the standby power system 102 has a low probability of being used, and is in the standby state most of the time. Before the life of energy storage device 105 is reached, its capacity may drop significantly for a variety of reasons. In order to ensure that the energy storage device 105 has sufficient capacity to supply emergency power to the powered device 104 when the main power supply system 101 cannot supply or no longer supplies power to the powered device 104, it is necessary to periodically perform a checkup discharge on the energy storage device 105 to check the health condition of the energy storage device. Of course, if it is detected that one or some energy storage devices do not meet the standby power requirement, the energy storage devices may be replaced in time to ensure the power safety of the powered device 104.

The power supply system 100 of the present embodiment includes: the discharging device 103, the discharging device 103 is mainly responsible for discharging the energy storage device 105 in the backup power system 102. In one discharging process, the discharging device 103 may discharge one energy storage device 105 in the standby power system 102, or may discharge a plurality of energy storage devices 105 in the standby power system 102 at the same time, which is not limited herein. For convenience of description and distinction, in the present embodiment, the energy storage device that needs to be discharged is referred to as a target energy storage device, and the target energy storage device may be one or more energy storage devices in the power backup system 102. In other words, in one discharging process, one energy storage device in the backup power system 102 may be discharged, or a plurality of energy storage devices in the backup power system 102 may be discharged simultaneously.

In this embodiment, an off-line discharging method is used to discharge the target energy storage device. The offline discharging mode is a process of discharging the target energy storage device in a state where the electrical connection between the target energy storage device and the power supply bus in the standby power system 102 is disconnected. Therein, the target energy storage device is electrically disconnected from the power supply bus in the standby system 102, which means that the target energy storage device is no longer directly standby for the powered device 104 through the power supply bus. The target energy storage device is discharged in an off-line discharging mode, so that the target energy storage device can be electrically isolated from the powered equipment, and the influence of a discharging process on the operation safety of the powered equipment is reduced; moreover, the depth of discharge is not limited by the requirement of the operation safety of the powered equipment any more, the depth of discharge is controllable, and the targeted energy storage device can be fully subjected to check discharge.

Further, in the present embodiment, during the off-line discharging process of the target energy storage device, the discharging device 103 is electrically connected between the input end of the standby power system 102 and the target energy storage device to form a discharging loop, and the discharging loop can incorporate the electric quantity of the target energy storage device during the off-line discharging into the standby power system 102, so as to supply power to the powered device 104. In the process of performing offline discharge on the target energy storage device, if the main power supply system 101 cannot supply power to the powered device 104 or no longer supplies power to the powered device 104, the target energy storage device may continue to supply power to the powered device 104 through the standby power system 102, that is, in the process of performing offline discharge on the target energy storage device, the target energy storage device still has the function of standby power for the powered device 104, so that emergency discharge can be realized, the standby power time is prolonged, and the power consumption safety of the powered device is fully ensured. Moreover, in the case that the target energy storage device is a part of energy storage devices in the standby power system 102, since the target energy storage device still has the function of standby power for the powered device 104 during the offline discharging process of the target energy storage device, the emergency discharging power of other energy storage devices is not increased, and the adverse effect of the increase of the emergency discharging power value on other energy storage devices can be avoided.

Here, the implementation structure of the discharge device 103 is not limited in the present application, and any implementation structure that can be electrically connected between the target energy storage device and the input end of the standby power system 102 and can form a discharge loop with the target energy storage device and the standby power system 102 in the process of performing offline discharge on the target energy storage device is suitable for the embodiment of the present application.

Besides the implementation structure of the power supply system 100, the embodiment of the present application also provides some implementation structures of the discharge device 103, and these implementation structures are only exemplary and do not limit the protection scope of the present application. In the following embodiments of the present application, some implementation structures of the discharge device 103 will be exemplarily described in connection with a usage state of the discharge device 103 in the power supply system 100.

Fig. 1b is a schematic structural diagram of a power supply system 100 according to an exemplary embodiment of the present disclosure. In contrast to fig. 1a, the power supply system 100 shown in fig. 1b shows an implementation of the discharge device 103. Referring to fig. 1b, one implementation of the discharge device 103 includes: grid-connected converter 1031. The grid-connected converter 1031 is a main component of the discharge device 103. In the present embodiment, the grid-connected converter 1031 has at least the following functions: during the off-line discharging process of the target energy storage device, the grid-connected converter 1031 may be electrically connected between the target energy storage device and the input end of the standby power system 102 to form a discharging loop, so as to incorporate the electric quantity of the target energy storage device during the discharging process into the standby power system 102 to supply power to the powered device 104.

Optionally, the grid-tie converter 1031 may disconnect the electrical connection to the target energy storage device and/or to the input of the backup power system 102 without the need to offline discharge the target energy storage device.

It should be noted that, in the process of performing offline discharge on the target energy storage device, all the implementation manners that the grid-connected converter 1031 can be electrically connected between the target energy storage device and the input end of the standby power system 102 and can form a discharge loop with the target energy storage device and the standby power system 102 are applicable to the embodiment of the present application, and are not limited thereto.

For example, in some embodiments of the present application, before the target energy storage device is discharged offline, the target energy storage device may be manually detached from the backup power system 102, and then the target energy storage device is electrically connected to the grid-connected converter 1031, and the grid-connected converter 1031 is electrically connected to the input terminal of the backup power system 102, so that the grid-connected converter 1031 forms a discharge loop with the target energy storage device and the backup power system 102.

Fig. 1c is a schematic diagram of another structure of a power supply system 100 according to an exemplary embodiment of the present disclosure. In comparison with fig. 1a, the power supply system 100 shown in fig. 1c shows another implementation of the discharge device 103. Referring to fig. 1c, another implementation of the discharge device 103 includes: a grid tied converter 1031 and a first switching device 1032. The first switching device 1032 is provided between the input terminal of the backup power system 102 and the output terminal of the grid-connected converter 1031. In the present embodiment, the first switching device 1032 has at least the following functions: the on state may be entered when the target energy storage device needs to be discharged offline, so that the grid-connected converter 1031 is electrically connected to the input of the backup power system 102. Of course, the first switching device 1032 may be in an open state to disconnect the electrical connection between the grid-connected converter 1031 and the input of the backup power system 102 without the need to off-line discharge the target energy storage device.

In this embodiment, the implementation manner of the first on/off device 1032 is not limited, and any electronic device having an on state and an off state is suitable for the embodiment of the present application. For example, the first switching device 1032 may be a switch, or other electronic device having a switching function, such as a triode, a MOS transistor, an Insulated Gate Bipolar Transistor (IGBT), an Integrated Gate Commutated Thyristor (IGCT), or the like. Of course, different devices may be flexibly selected for use as the first on/off device 1032 depending on the number of power phases supported by the main power supply system 101.

For example, if the main power supply system 101 is a three-phase power supply, a three-phase switch, a transistor, a MOS transistor, an IGBT, or an IGCT may be selected as the first switching device 1032 in the present embodiment.

For another example, if the main power supply system 101 is a dc power supply, a general switch or a diode may be selected as the first on/off device 1032 of the present embodiment.

It should be noted that the first switching device 1032 is illustrated as the switch Q2 in fig. 1c, and the switch Q2 is not distinguished between two phases and three phases in fig. 1c, which is merely an example.

In the implementation structure of the discharge device 103 shown in fig. 1c, the electrical connection between the target energy storage device and the grid-connected converter 1031 is not limited. For example, before the target energy storage device starts to be discharged offline, the target energy storage device may be manually detached from the backup power system 102, and then the target energy storage device may be connected to the grid-connected converter 1031. In addition to this, the electrical connection between the target energy storage device and the grid-tied converter 1031 may also be achieved by the switching device 1033 in fig. 1 d. In fig. 1d-1f and 1h, the energy storage device 105 is illustrated schematically as a battery pack.

Fig. 1d is a schematic structural diagram of a power supply system 100 according to an exemplary embodiment of the present disclosure. Compared to fig. 1a, the power supply system 100 shown in fig. 1d shows a further implementation of the discharge device 103. Referring to fig. 1d, yet another implementation of the discharge device 103 includes: a grid tied converter 1031, a first switching device 1032, and a switching device 1033.

The first on-off device 1032 is disposed between an input end of the backup power system 102 and an output end of the grid-connected converter 1031, and can control an electrical connection relationship between the grid-connected converter 1031 and the input end of the backup power system 102 by an on-off state thereof. Accordingly, the switching device 1033 is disposed between the grid-connected converter 1031 and at least one energy storage device 105, and can control an electrical connection relationship between each energy storage device 105 and the grid-connected converter 1031.

The first switching device 1032 has at least the following functions: the on state may be entered when the target energy storage device needs to be discharged offline, so that the grid-connected converter 1031 is electrically connected to the input of the backup power system 102. Of course, the first switching device 1032 may be in an open state to disconnect the electrical connection between the grid-connected converter 1031 and the input of the backup power system 102 without the need to off-line discharge the target energy storage device. For a description of the first switching device 1032, reference is made to the previous embodiments and no further description is given here. In fig. 1d, the first switching device 1032 is illustrated by way of example as a switch Q2.

Taking the target energy storage device as an example, the switching device 1033 at least has the following functions: under the condition that offline discharging of the target energy storage device is not needed, the switching device 1033 may electrically connect the target energy storage device with a power supply bus in the standby power system 102; in the case where offline discharging of the target energy storage device is required, the switching device 1033 may disconnect the electrical connection between the target energy storage device and the power supply bus in the backup system 102 and switch the target energy storage device to be electrically connected with the grid-connected converter 1031.

In this embodiment, the implementation manner of the switching device 1033 is not limited, and all devices having a switching function are suitable for the embodiments of the present application. For example, the switching device 1033 may include at least one switching switch having a latch function; a transfer switch having a latching function is provided between each energy storage device 105 and the grid-connected converter 1031.

Alternatively, the switch having the latching function may include, but is not limited to: an Automatic Transfer Switching (ATS), a Static Transfer Switch (STS), a single-pole double-throw Switch, a relay, or a disconnector.

In fig. 1d, the backup power system 102 is illustrated as including two energy storage devices, but not limited to two energy storage devices; one ATS is provided between each energy storage device and the grid-connected converter 1031, and fig. 1d illustrates ATS Q3 and Q4 as examples, but the ATS is not limited thereto.

As shown in FIG. 1d, ATS Q3 includes three terminals Q3-1, Q3-2 and Q3-3; q3-1 is electrically connected to the bus of grid-connected converter 1031, Q3-2 is electrically connected to the power supply bus of backup power system 102, and Q3-3 is electrically connected to energy storage device 105. Similarly, ATS Q4 includes three terminals Q4-1, Q4-2 and Q4-3; q4-1 is electrically connected to the bus of grid-connected converter 1031, Q4-2 is electrically connected to the power supply bus of backup power system 102, and Q4-3 is electrically connected to energy storage device 105. It is noted that Q3-3 and Q4-3 include positive and negative electrodes that are electrically connected to the positive and negative electrodes, respectively, of energy storage device 105.

In the power supply system 100 shown in fig. 1d, the energy storage device 105 electrically connected to the ATS Q4 is used as a target energy storage device, when offline discharging of the target energy storage device is required, the ATS Q4 may be switched from the terminal Q4-2 to the terminal Q4-1, and the switch Q2 is closed, at this time, the target energy storage device, the grid-connected converter 1031, and the standby power system 102 form a discharging loop, and during offline discharging of the target energy storage device, the electric quantity of the target energy storage device during discharging may enter the standby power system 102 after being connected in parallel with the main power supply system 101, so as to supply power to the powered device 104.

Fig. 1e is a schematic structural diagram of a power supply system 100 according to an exemplary embodiment of the present disclosure. Compared to fig. 1a, the power supply system 100 shown in fig. 1e shows a further implementation of the discharge device 103. Referring to fig. 1d, yet another implementation of the discharge device 103 includes: a grid tie converter 1031, a first switching device 1032, a switching device 1033, and a second switching device 1034.

For the description of the grid-connected converter 1031, the first on-off device 1032 and the switching device 1033, reference may be made to the foregoing embodiments, and details thereof are not repeated here.

During the offline discharging process of the target energy storage device, the main power supply system 101 may not be able to supply or no longer supply power to the powered device 104, and after a period of time, the powered device 104 may be supplied with power again. In this case, the phase when the main power supply system 101 re-supplies power to the powered device 104 may not be the same as the phase when the target energy storage device discharges, and if the two are directly connected in parallel to supply power to the powered device 104, a safety risk may occur to the powered device 104.

In order to solve the problem of phase inconsistency, in the present embodiment, a second switching device 1034 is additionally arranged between the input end of the backup power system 102 and the main power supply system 101, one end of a first switching device 1032 is connected to a connection point of the second switching device 1034 and the input end of the backup power system 102, and the other end of the first switching device 1032 is connected to an output end of the grid-connected converter 1031. In this way, the second switch-off device 1034 may enter the open state when the main power supply system 101 cannot supply or no longer supply power to the powered device 104, thereby disconnecting the electrical connection between the main power supply system 101 and the standby power system 102, which may avoid the risk of the powered device due to the inconsistency between the phase when the main power supply system 101 supplies power to the powered device 104 and the phase when the target energy storage device discharges power. In the case that the main power supply system 101 can supply power to the powered device 104 again, the first on-off device 1032 may be put into the off state first, and then the second on-off device 1034 may be put into the on state, so as to solve the problem of risk of the powered device due to phase inconsistency between the two. Alternatively, when the main power supply system 101 can supply power to the powered device 104 again, the phase of the target energy storage device during discharging may be adjusted first, and/or the phase of the main power supply system 101 supplying power to the powered device 104 again may be adjusted, so that the two phases are consistent, and then the second switch 1034 is turned on, and the problem of risk of the powered device due to the inconsistency between the two phases may also be solved.

In the present embodiment, the implementation manner of the second interrupter 1034 is not limited, and any electronic device having an on state and an off state is suitable for the embodiments of the present application. For example, the second interrupter 1034 may be a switch or other electronic device having a switching function, such as a transistor, a MOS transistor, an IGBT, an IGCT, or the like. Of course, depending on the number of power phases supported by the main power supply system 101, different devices may be flexibly selected for use as the second interrupter device 1034.

For example, if the main power supply system 101 is a three-phase power supply, a three-phase switch, a transistor, a MOS transistor, an IGBT, or an IGCT may be selected as the second interrupter device 1034 of the present embodiment.

For another example, if the main power supply system 101 is a dc power supply, a general switch or a diode may be selected as the second interrupter device 1034 of the present embodiment.

It is noted that the second interrupter 1034 is illustrated in fig. 1e by taking the switch Q1 as an example, and the switch Q2 is not distinguished from two phases and three phases in fig. 1e, which is merely an example.

Fig. 1f is a schematic structural diagram of a power supply system 100 according to an exemplary embodiment of the present disclosure. In comparison to fig. 1a, the power supply system 100 shown in fig. 1f shows a further implementation of the discharge device 103. Referring to fig. 1f, yet another implementation of the discharge device 103 includes: a grid tie converter 1031, a first switching device 1032, a switching device 1033, a second switching device 1034, and a controller 1035.

For the description of the grid-connected converter 1031, the first switching device 1032, the switching device 1033 and the second switching device 1034, reference may be made to the foregoing embodiments, and the description thereof is omitted.

In this embodiment, the controller 1035 essentially performs various controls on the offline discharge process of the target energy storage device. For example, the controller 1035 is electrically connected to the switching device 1033 and the first switching device 1032, and is configured to control the switching device 1033 to electrically connect the target energy storage device with the grid-connected converter 1031 and control the first switching device 1032 to enter an on state to electrically connect the grid-connected converter 1031 with the input terminal of the backup power system 102 when the target energy storage device needs to be discharged offline.

Further, the controller 1035 may also be electrically connected to the second interrupter 1034, and in case the power supply system 101 cannot or can no longer supply power to the powered device 104, control the second interrupter 1034 to enter the open state; and controls the second interrupter 1034 to enter the on state in a case where the main power supply system 101 can supply power to the powered device 104.

In the present embodiment, the implementation form of the controller 1035 is not limited, and may be a CPU, a GPU, various processing chips, or the like.

In fig. 1f, the second switching device 1034 and the first switching device 1032 are illustrated by taking the switches Q1 and Q2 as an example, and the backup power system 102 is illustrated by taking the example that two energy storage devices are included, one ATS is provided between each energy storage device and the grid-connected converter 1031, and in fig. 1f, the ATS Q3 and Q4 are illustrated as an example, but the invention is not limited thereto.

In this embodiment, during off-line discharging of the target energy storage device, the switches Q1, Q2 have a latching relationship. The latching relationship between the switches Q1, Q2 is described in connection with the latching relationship state machine between the switches Q1, Q2 shown in fig. 1 g: in the discharging process, the switches Q1 and Q2 are both closed, at this time, if the upper port of the switch Q1 (i.e., the main power supply system 101) loses power, the switch Q1 is opened, the switch Q2 keeps a closed state, and the discharging is continued to provide energy for the powered device until the discharging is finished; during this time, if power is restored to the upper port of the switch Q1, the discharging process may be stopped, the switch Q2 may be opened, and the switch Q1 may be closed after a short period of time, such as 3 seconds. Wherein,

in this embodiment, ATS Q3 and Q4 may have status feedback dry junctions, and the connection status thereof may be fed back to the controller 1035 in the discharge device 103 based on the status feedback dry junctions.

The operation of the power supply system 100 shown in fig. 1f is briefly explained as follows:

checking the state of the discharge device before starting: when the discharging device is not started, the switch Q1 is in a closed state, and the switch Q2 is in an open state; ATS Q3 is at position Q3-2, ATS Q4 is at position Q4-2; the power supply system is in normal operation, and the power receiving device is supplied with power by the main power supply system 101. In fig. 1f, 380 v ac mains is illustrated as an example of the main power supply system 101, but is not limited thereto.

Self-checking process of the discharge device: when the energy storage device connected with the ATS Q3 needs to be discharged off line, the discharging device carries out self-checking, the states of the switches Q1 and Q2 and the states of the ATS Q3 and Q4 are checked, at the moment, the switch Q1 is closed, the switch Q2 is opened, the ATS Q3 is in a Q3-1 closed state, and the ATS Q4 is in a Q4-2 closed state.

Wherein, ATS Q3, Q4 can feed back their connection status to controller 1035 through status feedback dry node; if the ATS Q3 and Q4 are detected to be in the closed state of the Q3-1 and Q4-1 ends at the same time, alarming is carried out, and the starting of the discharging process is refused; if the ATS Q3 is detected to be in the Q3-1 closed state, the ATS Q4 is in the Q4-2 closed state, which indicates that the discharging process can be started.

Setting discharge parameters: according to the discharge requirement, parameters such as discharge power, discharge cut-off time, discharge cut-off voltage, discharge recording parameters, discharge operation executor and the like are set.

Starting and executing a discharging process: the switch Q2 is closed, a discharge process is initiated, and the latching relationship between the switches Q1, Q2 is checked during the discharge process until the discharge is over.

In the above process, the controller 1035 may determine a target energy storage device to be discharged offline from among the at least one energy storage device 105 included in the power backup system 102. For example, the controller 1035 may receive a discharge command issued by an administrator, parse identification information of a target energy storage device from the discharge command, and determine the target energy storage device according to the identification information. Alternatively, the controller 1035 may automatically determine a target energy storage device from among the at least one energy storage device 105 that needs to be discharged offline, according to a set discharge management policy.

Further, the controller 1035 may further receive a discharge parameter set by an administrator, and control the grid-connected controller 1031 to discharge the target energy storage device according to the discharge parameter. Discharge parameters include, but are not limited to: discharge power, discharge cutoff time, discharge cutoff voltage, discharge recording parameters, and discharge operation performer.

Further, the controller 1035, after the discharge is over, may be further configured to perform at least one of:

operation 1: and outputting the prompt information of the end of the discharge. For example, the information for prompting the end of discharge may be output by sound, photoelectric, or the like.

Operation 2: the switch Q2 is controlled to enter an open state to end the offline discharge process for the target battery.

Operation 3: the discharge data is stored locally. The discharge data refers to relevant data generated in the discharge process, such as discharge power, discharge duration, discharge current, checking capacity of the target energy storage device, and the like.

And operation 4: and uploading the discharge data to an upper computer or a monitoring system for archiving and analyzing.

Operation 5: the prompt charges the target energy storage device to continue to reserve power for the powered device, so that the power utilization safety of the powered device and the reliability of a power supply system are improved.

In the present embodiment, the implementation of the main power supply system 101 and the standby power supply system 102 is not limited, and the standby power supply system 102 is adapted to the main power supply system 101. For example, the main Power Supply System 101 and the standby Power Supply System 102 may be a main Power Supply System and a standby Power Supply System in an Uninterruptible Power Supply (UPS) System, respectively. For another example, the main power supply system 101 and the backup power system 102 may be a main power supply system and a backup power system in a High Voltage Direct Current (HVDC) power transmission system, respectively.

The connection mode of the energy storage device and the power supply bus is slightly different corresponding to different power supply systems. Taking the UPS standby system as an example, the output is ac, and the dc power supply bus is inside the UPS standby system, so the energy storage device needs to be connected inside the UPS standby system, as shown in fig. 1a-1 f. Taking the HVDC power backup system as an example, the output of the HVDC power backup system is dc, and the energy storage device can be directly connected to the dc bus at the output end of the HVDC power backup system, as shown in fig. 1 h.

In the above embodiments, the main function of the grid-connected converter 1031 is to incorporate the electric quantity of the target energy storage device during the offline discharge into the backup power system 102. Optionally, in this process, if the discharge current of the target energy storage device during the offline discharge is not adapted to the supply current of the main power supply system 101, the grid-connected converter 1031 may further perform adaptation processing on the discharge current of the target energy storage device during the offline discharge and the supply current of the main power supply system 101. The adaptation process here includes, but is not limited to: the adaptation between direct current and alternating current, the adaptation between current magnitude and voltage magnitude, and the like.

In this embodiment, an implementation structure of the grid-connected converter 1031 is not limited, and any implementation structure that can incorporate the electric quantity of the target energy storage device into the standby power system 102 during the offline discharge period and can adapt the discharge current of the target energy storage device during the offline discharge period to the supply current of the main power supply system 101 when necessary is applicable to this embodiment. An implementation structure of the grid-connected converter 1031 is exemplarily described below.

For example, in one application scenario, the main power supply system 101 is an ac power supply system. Based on this, one implementation structure of the grid-connected converter 1031 is shown in fig. 2a, and includes: a DC bi-directional converter and an inverter. Wherein the input of the dc bi-directional converter is electrically connected to the switching device 1033, the output of the dc bi-directional converter is electrically connected to the input of the inverter, and the output of the inverter is electrically connected to the first switching device 1032.

The bidirectional direct current converter is a device for realizing bidirectional flow of direct current, can adopt a classic BUCK/BOOST circuit topology, and has the functions of boosting and reducing voltage bidirectional conversion, namely a BUCK-BOOST chopper circuit. When direct current flows from C1 to C2, the bidirectional direct current converter works in a BOOST mode to realize a BOOST function; when the direct current flows from the C2 to the C1, the bidirectional direct current converter works in a BUCK mode to realize a voltage reduction function. C1 and C2 represent the starting point and the target point of the direct current, and can be flexibly determined according to application requirements. In this embodiment, C1 may represent the target energy storage device, and C2 represents the backup power system 102; alternatively, C1 represents the backup power system 102 and C2 represents the target energy storage device. The inverter is a device for converting direct current into alternating current, and may include devices such as an inverter bridge, a control logic, a filter circuit, and the like.

In the grid-connected converter 1031 shown in fig. 2a, the dc power generated by the target energy storage device during the off-line discharge enters the dc bidirectional converter, and is sent to the inverter after being boosted or reduced in voltage by the dc bidirectional converter; the inverter is responsible for converting the boosted or reduced dc power into ac power and then sending the ac power to the backup power system 102. That is, the grid-connected converter 1031 shown in fig. 2a can perform dc-to-ac adaptation between the target energy storage device and the main power supply system 101 during the off-line discharging process of the target energy storage device.

For example, in another application scenario, the main power supply system 101 is a dc power supply system. Based on this, one implementation structure of the grid-connected converter 1031 is shown in fig. 2b, and includes: a voltage converter. Wherein the input of the voltage converter is electrically connected to the switching device 1033 and the output of the voltage converter is electrically connected to the first on/off device 1032. A voltage converter is a device for voltage conversion by the principle of electromagnetic induction. In the grid-connected converter 1031 shown in fig. 2b, the dc power generated by the target energy storage device during the off-line discharge enters the voltage converter, and is sent to the backup power system 102 after being boosted or reduced in voltage by the voltage converter. That is, the grid-connected converter 1031 shown in fig. 2b can perform voltage adaptation on the direct current between the target energy storage device and the main power supply system 101 during the off-line discharging process of the target energy storage device.

Fig. 3a is a schematic structural diagram of another power supply system 300 according to an exemplary embodiment of the present application. The power supply system 300 of the present embodiment is a power supply system with backup power, as shown in fig. 3a, the power supply system 300 includes: a main power supply system 301, a backup power system 302, a discharge device 303, and a first on-off device 306.

The main power supply system 301 is a main power supply system of the power supply system 300, and the power receiving apparatus 304 is normally supplied with power from the main power supply system 301. The backup power supply system 302 is a backup power supply system of the power supply system 300, and is mainly used for supplying power to the power receiving apparatus 304 when the main power supply system 301 cannot supply power to or does not supply power to the power receiving apparatus 304 any more.

The device type of the power receiving device 304 may vary according to the power supply scenario of the power supply system 300. In the present embodiment, the power receiving apparatus is broadly defined, and any apparatus, system, load, or the like that can obtain power from the power supply system 300 can be used as the power receiving apparatus in the embodiments of the present application.

In this embodiment, the backup power system 302 includes at least one energy storage device 305 for providing a backup power source for the powered device 304. Wherein each energy storage device 305 may comprise one battery, or a plurality of batteries. In the case where the energy storage device 305 includes a plurality of secondary batteries, the plurality of secondary batteries are connected in series. Plural here means two or more.

In this embodiment, the output terminal of the main power supply system 301 is electrically connected to the input terminal of the backup power system 302, and the power receiving device 304 is powered by the backup power system 302. In this way, the standby power system 302 may sense whether the main power system 301 successfully supplies power to the powered device 304, and activate all or part of the energy storage device 305 to supply power to the powered device 304 when sensing that the main power system 301 cannot supply power to or can no longer supply power to the powered device 304.

In this embodiment, the backup power system 302 includes a power bus, and the power supply current provided by the main power supply system 301 is transmitted to the powered device 304 through the power bus. The energy storage device 305 in the backup power system 302 is connected to the power bus as a backup power source to provide emergency power for the powered device 304 when the main power system 301 cannot or can no longer provide power for the powered device 304.

The energy storage device 305 in the backup power system 302 is used with a low probability and is in a backup state most of the time. Before the life of the energy storage device 305 is reached, its capacity may drop significantly for a variety of reasons. In order to ensure that the energy storage device 305 has sufficient capacity to supply emergency power to the powered device 304 when the main power supply system 301 cannot supply or no longer supplies power to the powered device 304, it is necessary to check the health condition of the energy storage device by periodically performing a check discharge on the energy storage device 305. Of course, if it is detected that the energy storage device does not meet the standby power requirement, the energy storage device may be replaced in time to ensure the power safety of the powered device 304.

The power supply system 300 of the present embodiment includes: the discharging device 303, the discharging device 303 is mainly responsible for discharging the energy storage device 305 in the backup power system 302. In a discharging process, the discharging device 303 may discharge one energy storage device 305 in the backup power system 302, or may discharge several energy storage devices 305 in the backup power system 302 at the same time, which is not limited herein. For convenience of description and distinction, in the present embodiment, the energy storage device that needs to be discharged is referred to as a target energy storage device, and the target energy storage device includes one or several energy storage devices in the backup power system 302.

In this embodiment, an off-line discharging method is used to discharge the target energy storage device. The offline discharging manner is a process of discharging the target energy storage device in a state where the electrical connection between the target energy storage device and the power supply bus in the standby power system 302 is disconnected. Here, the target energy storage device is electrically disconnected from the power supply bus in the standby system 302, which means that the target energy storage device is no longer directly standby for the powered device 304 through the power supply bus. The target energy storage device is discharged in an off-line discharging mode, so that the target energy storage device can be electrically isolated from the powered equipment, and the influence of a discharging process on the operation safety of the powered equipment is reduced; moreover, the depth of discharge is not limited by the requirement of the operation safety of the powered equipment any more, the depth of discharge is controllable, and the targeted energy storage device can be fully subjected to check discharge.

Further, in this embodiment, during the off-line discharging process of the target energy storage device, the discharging device 303 is electrically connected between the input terminal of the standby power system 302 and the target energy storage device to form a discharging loop, and the discharging loop can incorporate the electric quantity of the target energy storage device during the off-line discharging process into the standby power system 302, so as to supply power to the powered device 304. In the process of performing offline discharge on the target energy storage device, if the main power supply system 301 cannot supply power to the powered device 304 or cannot supply power to the powered device any more, the target energy storage device may continue to supply power to the powered device 304 through the standby power system 302, that is, in the process of performing offline discharge on the target energy storage device, the target energy storage device still has the function of standby power for the powered device 304, so that emergency discharge can be realized, the standby power time is prolonged, and the power consumption safety of the powered device is fully ensured. Moreover, in the case that the target energy storage device is a part of energy storage devices in the backup power system 302, since the target energy storage device still has the function of backing up the powered device 304 during the offline discharging process of the target energy storage device, the emergency discharging power of other energy storage devices is not increased, and the adverse effect of the increase of the emergency discharging power value on other energy storage devices can be avoided.

Further, in the power supply system 300 of the present embodiment, a first on-off device 306 is provided between the discharge device 303 and the input terminal of the standby system 302. The first switching device 306 may enter an on state in case of off-line discharging of the target energy storage device is required, so as to electrically connect the discharging device 303 with the input terminal of the standby power system 302. Providing conditions for the discharge device 303 to form a discharge loop with the backup power system 302 and the target energy storage device. Of course, in the case where offline discharging of the target energy storage device is not required, the first switching device 306 may be in an open state to break the electrical connection between the discharging device 303 and the input terminal of the standby power system 302. The implementation and other descriptions of the first switching device 306 are the same as or similar to the first switching device 1032 in the above-described embodiment, and are not repeated herein.

In the present embodiment, the manner of connection between the target energy storage device and the open electric device 303 is not limited. For example, in the power supply system 300 shown in fig. 3b, the following is also included: a switching device 307 arranged between the discharge means 303 and the at least one energy storage means 305. The switching device 307 may disconnect the electrical connection between the target energy storage device and the power supply bus in the standby power system 302 and switch the target energy storage device to be electrically connected with the discharging device 303 in the case that offline discharging of the target energy storage device is required. The implementation of the switching device 307 and other descriptions are the same as or similar to the switching device 1033 in the above embodiments, and are not repeated herein. In fig. 3b, the energy storage device 305 is illustrated schematically as a battery pack.

In an alternative embodiment of the present application, as shown in fig. 3b, the power supply system 300 further includes: and a second interrupter 308 disposed between the main power supply system 301 and the input terminal of the standby power system 302. In this embodiment, the first switching device 306 has one end connected to the connection point of the second switching device 308 with the input terminal of the standby power system 302 and the other end connected with the output terminal of the discharging device 303. The second switch-off 308 may enter the off state if the primary power supply system 301 is unable to or is no longer supplying power to the powered device 304. The implementation of the second interrupter 308 and other descriptions are the same as or similar to the second interrupter 1034 of the above embodiments and are not repeated herein.

In an alternative embodiment of the present application, as shown in fig. 3b, the power supply system 300 further includes: a controller 309.

The controller 309 is electrically connected to the switching device 307 and the first on-off device 306, and is configured to control the switching device 307 to electrically connect the target energy storage device with the discharging device 303 and control the first on-off device 306 to enter an on state, so that the discharging device 303 is electrically connected to the input end of the standby power system 302, when the target energy storage device needs to be discharged offline.

Further, the controller 309 may also be electrically connected to the second switch-off member 308, controlling the second switch-off member 308 to enter the off-state in case the main power supply system 301 is unable or no longer able to supply power to the powered device 304; and in case the main power supply system 301 can normally supply power to the powered device 304, control the second switch-off member 308 to enter the on-state.

The functions of the controller 309 and other descriptions are the same as or similar to those of the controller 1035 in the above embodiments, and are not described again here.

In the embodiment shown in fig. 3a or fig. 3b, the main function of the discharging device 303 is to incorporate the amount of power of the target energy storage device during offline discharging into the backup power system 302. Optionally, in this process, if the discharge current of the target energy storage device during the offline discharge is not adapted to the supply current of the main power supply system 301, the discharge device 303 may further perform an adaptation process on the discharge current of the target energy storage device during the offline discharge and the supply current of the main power supply system 301. The adaptation process here includes, but is not limited to: the adaptation between direct current and alternating current, the adaptation between voltage magnitudes, and the like.

In this embodiment, the implementation structure of the discharging device 303 is not limited, and any implementation structure that can incorporate the electric quantity of the target energy storage device into the standby power system 302 during the offline discharging period and can adapt the discharging current of the target energy storage device during the offline discharging period to the power supply current of the main power supply system 301 when necessary is suitable for this embodiment.

As shown in fig. 3b, one implementation of the discharge device 303 includes a grid-tied converter 3031. An implementation structure of the grid-connected converter 3031 is the same as or similar to that of the grid-connected converter 1031 in the foregoing embodiment, and reference may be made to the description in the embodiment shown in fig. 2a and fig. 2b, which is not described herein again.

It should be noted that the power supply system provided in the above embodiments of the present application can be applied to various application scenarios with power supply requirements. For example, the method can be applied to a data center, a computer room system or a cluster system and the like. The following description will take an example of an application of the power supply system provided in the embodiment of the present application in a data center.

Fig. 4 is a schematic structural diagram of a power supply system of a data center according to an exemplary embodiment of the present application. As shown in fig. 4, the power supply system 400 includes: and the at least one power supply system 401 is used for supplying power to at least one load of the data center. In this embodiment, the number of load paths in the data center is not limited, and may be a single load path, or two or more load paths.

The at least one power supply system 401 includes a first power supply system. Wherein the first power supply system is a power supply system with standby power.

The first power supply system includes: main power supply system, standby power system and discharge device. The output end of the main power supply system is electrically connected with the input end of the standby power system, and the standby power system supplies power to one corresponding load; the standby power system comprises at least one energy storage device and provides a standby power supply for one path of corresponding load; in the process of off-line discharging of the target energy storage device, the discharging device is electrically connected between the target energy storage device and the input end of the standby power system to form a discharging loop, and the electric quantity of the target energy storage device during discharging is merged into the standby power system to supply power to one corresponding load; wherein the target energy storage device comprises one or several of the at least one energy storage device.

For a detailed implementation structure of the first power supply system, reference may be made to descriptions in the embodiments shown in fig. 1a to 1f, fig. 1h, and fig. 3a to 3b, which are not repeated herein.

Optionally, the at least one power supply system 401 may all adopt the first power supply system. Of course, part of the power supply systems may adopt the first power supply system, and other power supply systems may adopt the second power supply system. Wherein the second power supply system is a power supply system without a backup power supply.

Taking the data center including two loads as an example, the two loads may both adopt the first power supply system to supply power. Further, taking the case that the data center comprises two paths of loads as an example, the power supply system of one path of load is a UPS power supply system with standby power; the power supply system of one load is a HVDC power supply system with backup power, but is not limited thereto. Or,

taking the data center including two paths of loads as an example, one path of load adopts a first power supply system to supply power, and the other path of load adopts a second power supply system to supply power. Further, the second power supply system is a commercial power supply system, and the first power supply system is a UPS power supply system with standby power, but is not limited thereto.

In addition to the above system and apparatus embodiments, the present application provides a method of discharging. The discharge method is applicable to the discharge device or the discharge system in the foregoing embodiments. As shown in fig. 5, the discharge method includes:

501. and determining a target energy storage device needing offline discharging from at least one energy storage device contained in the standby power system.

502. And electrically connecting the discharge device between the input end of the standby power system and the target energy storage device to form a discharge loop.

503. And the electric quantity of the target energy storage device during the discharging period is incorporated into a standby power system through the discharging loop to supply power to the powered equipment.

In an alternative embodiment, in conjunction with the discharging system shown in fig. 1d-1f and fig. 3b, one embodiment of the step 502 of electrically connecting the discharging device between the input terminal of the standby power system and the target energy storage device to form a discharging loop includes:

controlling a switching device between the discharge device and the at least one energy storage device to switch the target energy storage device to be electrically connected with the discharge device;

and controlling a first on-off device between the discharging device and the input end of the standby power system to enter an on state so as to electrically connect the discharging device and the input end of the standby power system.

Further, in conjunction with the discharge system shown in fig. 1d-1f, fig. 3b, the controlling the switching device between the discharge device and the at least one energy storage device to be switched to be electrically connected with the discharge device includes: and a selector switch with a locking function for controlling the discharge device and the target energy storage device to be switched from the input end electrically connected with the standby power system to the input end electrically connected with the discharge device, so that the target energy storage device is electrically connected with the discharge device.

Further, the discharging method of the present embodiment may further include: and setting a discharge parameter so that the discharge device discharges the target energy storage device according to the discharge parameter. Discharge parameters include, but are not limited to, at least one of: discharge power, discharge cutoff time, discharge cutoff voltage, discharge recording parameters, discharge operation performer, and the like.

Further, the discharging method of the embodiment further includes, after the discharging is finished, at least one of the following operations:

outputting prompt information of the end of discharge;

controlling the first on-off device to enter an off state;

storing the discharge data locally;

and uploading the discharge data to an upper computer or a monitoring system.

Accordingly, the present application further provides a computer-readable storage medium storing a computer program, where the computer program can implement the steps in the above method embodiments when executed.

It should be noted that the execution subjects of the steps of the methods provided in the above embodiments may be the same device, or different devices may be used as the execution subjects of the methods. For example, the execution subjects of steps 501 to 503 may be device a; for another example, the execution subjects of

steps

501 and 502 may be device a, and the execution subject of step 503 may be device B; and so on.

In addition, in some of the flows described in the above embodiments and the drawings, a plurality of operations are included in a specific order, but it should be clearly understood that the operations may be executed out of the order presented herein or in parallel, and the sequence numbers of the operations, such as 501, 502, etc., are merely used for distinguishing different operations, and the sequence numbers themselves do not represent any execution order. Additionally, the flows may include more or fewer operations, and the operations may be performed sequentially or in parallel. It should be noted that, the descriptions of "first", "second", etc. in this document are used for distinguishing different messages, devices, modules, etc., and do not represent a sequential order, nor limit the types of "first" and "second" to be different.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.

Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. An electric discharge device, comprising: a grid-connected converter;

in the process of discharging a target energy storage device in a standby power system, the grid-connected converter can be electrically connected between the input end of the standby power system and the target energy storage device to form a discharge loop, and the electric quantity of the target energy storage device during the discharge period is merged into the standby power system to supply power to a powered device;

wherein the target energy storage device is one or more energy storage devices in the backup power system.

2. The apparatus of claim 1, further comprising: a first on-off device;

the first on-off device is arranged between the input end of the standby power system and the output end of the grid-connected converter, and can enter a switch-on state under the condition that the target energy storage device needs to be discharged, so that the grid-connected converter is electrically connected with the input end of the standby power system.

3. The apparatus of claim 2, further comprising: a second on-off device;

the second on-off device is arranged between the input end of the standby power system and the main power supply system, and the first on-off device is connected to the connecting point of the second on-off device and the input end of the standby power system;

the second on-off device may enter an off state in a case where the main power supply system cannot supply or does not supply power to the powered apparatus.

4. The apparatus according to claim 2 or 3, wherein the first switching device is a switch, a triode, a MOS transistor, an IGBT or an IGCT; the second on-off device is a switch, a triode, an MOS (metal oxide semiconductor) tube, an IGBT or an IGCT.

5. The apparatus of claim 2 or 3, further comprising: a switching device;

the switching device is arranged between the grid-connected converter and the at least one energy storage device, and can switch the target energy storage device to be electrically connected with the grid-connected converter under the condition that the target energy storage device needs to be discharged.

6. The apparatus according to claim 5, wherein the switching means comprises at least one switch having a latching function; and a change-over switch with a locking function is arranged between each energy storage device and the grid-connected converter.

7. The apparatus of claim 6, wherein the switch with a latch function comprises: automatic transfer switch ATS, static transfer switch STS, single pole double throw switch, relay or isolator.

8. The apparatus of claim 5, wherein the grid-tied converter comprises: a DC bi-directional converter and an inverter;

the input end of the direct current bidirectional converter is electrically connected with the switching device, and the output end of the direct current bidirectional converter is electrically connected with the input end of the inverter; the output end of the inverter is electrically connected with the first on-off device and is used for converting the direct current of the target energy storage device into alternating current and then merging the alternating current into the standby power system.

9. The apparatus of claim 5, wherein the grid-tied converter comprises: a voltage converter;

the input end of the voltage converter is electrically connected with the switching device, and the output end of the voltage converter is electrically connected with the first on-off device and is used for merging the target energy storage device into the standby power system after voltage adaptation is carried out on the target energy storage device.

10. The apparatus of claim 5, further comprising: a controller;

the controller is electrically connected with the switching device and the first on-off device, and is used for controlling the switching device to connect the target energy storage device with the grid-connected converter and controlling the first on-off device to enter a connection state under the condition that the target energy storage device needs to be discharged.

11. The apparatus of any of claims 1-3 and 6-10, wherein the power backup system is a UPS power backup system or a HVDC power backup system.

12. A power supply system, comprising: the system comprises a main power supply system, a standby power system and a discharging device;

the output end of the main power supply system is electrically connected with the input end of the standby power system, and power is supplied to the power receiving equipment through the standby power system;

the standby power system comprises at least one energy storage device and is used for providing standby power for the powered equipment;

in the process of discharging a target energy storage device, the discharging device is electrically connected between the target energy storage device and the input end of the standby power system to form a discharging loop, and the electric quantity of the target energy storage device during the discharging process is merged into the standby power system to supply power to the powered device; wherein the target energy storage device is one or more of the at least one energy storage device.

13. The system of claim 12, wherein the discharge device comprises: a grid-connected converter;

in the process of discharging a target energy storage device, the grid-connected converter is electrically connected between the target energy storage device and the input end of the standby power system to form a discharge loop, and the electric quantity of the target energy storage device during the discharge period can be merged into the standby power system to supply power to a powered device.

14. The system of claim 13, wherein the discharge device further comprises: a first on-off device;

15. The system of claim 14, wherein the discharge device further comprises: a second on-off device;

the second on-off device is arranged between the main power supply system and the input end of the standby power system, and the first on-off device is connected to the connecting point of the second on-off device and the input end of the standby power system;

16. The system of claim 14, wherein the discharge device further comprises: a switching device;

17. The system of claim 16, wherein the discharge device further comprises: a controller;

18. The system of claim 12, further comprising: a first on-off device provided between the discharge device and an input terminal of the backup power system;

the first on-off device can enter an on state when the target energy storage device needs to be discharged, so that the discharging device is electrically connected with the input end of the standby power system.

19. The system of claim 18, further comprising: a second interrupter device disposed between the main power supply system and an input terminal of the standby power supply system, the second interrupter device being capable of entering an off state when the main power supply system is unable to supply or does not supply power to the powered device;

wherein the first on-off device is connected to a connection point of the second on-off device and an input end of the standby power system.

20. The system of claim 18, further comprising: a switching device disposed between the discharge device and the at least one energy storage device;

the switching device may switch the target energy storage device to be electrically connected with the discharging device in a case where the target energy storage device needs to be discharged.

21. The system of claim 20, further comprising: a controller;

the controller is electrically connected with the switching device and the first on-off device, and is used for controlling the switching device to connect the target energy storage device with the discharging device and controlling the first on-off device to enter a connected state under the condition that the target energy storage device needs to be discharged.

22. The system of claim 20, wherein the discharge device comprises: a grid-connected converter; the input end of the grid-connected converter is electrically connected with the switching device, and the output end of the grid-connected converter is electrically connected with the first on-off device.

23. The system according to claim 15 or 19, wherein the first switching device is a switch, a triode, a MOS transistor, an IGBT or an IGCT; the second on-off device is a switch, a triode, an MOS (metal oxide semiconductor) tube, an IGBT or an IGCT.

24. System according to claim 16 or 20, characterized in that the switching means comprise at least one switch with a blocking function; and a change-over switch with a locking function is arranged between each energy storage device and the discharge device.

25. The system of claim 24, wherein the transfer switch with lockout function comprises: ATS, STS, single pole double throw switch, relay, or isolator.

26. The system of claim 16 or 22, wherein the grid-tie converter comprises: a DC bi-directional converter and an inverter;

27. The system of claim 16 or 22, wherein the grid-tie converter comprises: a voltage converter;

28. The system of any one of claims 12-22, wherein the power backup system is a UPS power backup system or a HVDC power backup system.

29. A method of discharging, comprising:

determining a target energy storage device needing to be discharged from at least one energy storage device contained in the standby power system;

electrically connecting a discharge device between the input end of the standby power system and the target energy storage device to form a discharge loop;

and the electric quantity of the target energy storage device during the discharge is incorporated into the standby power system through the discharge loop to supply power to the powered equipment.

30. The method of claim 29, wherein electrically connecting a discharge device between the input of the backup power system and the target energy storage device forms a discharge loop, comprising:

controlling a switching device between the discharge apparatus and the at least one energy storage apparatus to switch the target energy storage apparatus to be electrically connected with the discharge apparatus;

and controlling a first on-off device between the discharging device and the input end of the standby power system to enter a switch-on state so as to electrically connect the discharging device and the input end of the standby power system.

31. The method of claim 30, wherein controlling a switching device between the discharge device and the at least one energy storage device to switch the target energy storage device into electrical connection with the discharge device comprises:

and controlling a selector switch with a locking function between the discharging device and the target energy storage device to switch from an input end electrically connected with the standby power system to an input end electrically connected with the discharging device so as to electrically connect the target energy storage device with the discharging device.

32. The method of claim 30, further comprising, prior to controlling the first switching device between the discharging apparatus and the input of the backup power system into an on state:

and setting discharge parameters so that the discharge device discharges the target energy storage device according to the discharge parameters.

33. The method according to any one of claims 30-32, further comprising, after the end of the discharging, at least one of:

outputting prompt information of the end of discharge;

controlling the first on-off device to enter an off state;

storing the discharge data locally;

and uploading the discharge data to an upper computer or a monitoring system.

34. A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, causes the processor to carry out the steps of the method of any one of claims 29-33.

35. A power supply system for a data center, comprising: the at least one power supply system is used for supplying power to at least one load of the data center;

the at least one path of power supply system comprises a first power supply system; the first power supply system includes: the system comprises a main power supply system, a standby power system and a discharging device;

the output end of the main power supply system is electrically connected with the input end of the standby power system, and the standby power system supplies power to one corresponding load; the standby power system comprises at least one energy storage device and provides a standby power supply for one path of corresponding load;

in the process of discharging a target energy storage device, the discharging device is electrically connected between the target energy storage device and the input end of the standby power system to form a discharging loop, and the electric quantity of the target energy storage device during the discharging period is merged into the standby power system to supply power for one corresponding load; wherein the target energy storage device comprises one or more of the at least one energy storage device.

36. The system of claim 35, further comprising a second power supply system in said at least one power supply system; the second power supply system is a power supply system without a backup power supply.