CN115833195A

CN115833195A - Safety protection method of energy storage system and energy storage system

Info

Publication number: CN115833195A
Application number: CN202211308879.7A
Authority: CN
Inventors: 朱建斌; 卢艳华; 余东旭; 徐祥祥
Original assignee: Ningde Times Future Energy Shanghai Research Institute Co ltd
Current assignee: Ningde Times Future Energy Shanghai Research Institute Co ltd
Priority date: 2022-10-25
Filing date: 2022-10-25
Publication date: 2023-03-21

Abstract

The application relates to a safety protection method of an energy storage system and the energy storage system, wherein the energy storage system is provided with a plurality of function keys, different function keys correspond to different safety protection functions, and the method responds to trigger operation by acquiring the trigger operation of a target function key in the plurality of function keys and executing power-off protection operation corresponding to the target function key on the energy storage system. This application adopts the key operation of scene, sets up a plurality of function button on the electric cabinet, and each function button corresponds different safety protection function. According to the power-off test scenes of different requirements, the power-off operation is carried out on the electric cabinet or the container in the energy storage system according to the trigger operation by acquiring the trigger operation of different target function keys, so that the fault isolation and safety protection of the electric cabinet under different scene modes are realized, and the risk of electric shock caused by opening the cabinet when a tester tests and overhauls the electric cabinet is avoided.

Description

Safety protection method of energy storage system and energy storage system

Technical Field

The application relates to the technical field of energy storage of power systems, in particular to a safety protection method of an energy storage system and the energy storage system.

Background

The novel energy storage system has the advantages of flexibly regulating and controlling the output power of the energy storage system, eliminating grid-connected harmonic waves, reducing investment cost, reducing the grid loss of the energy storage system and the like, and therefore the novel energy storage system is widely applied.

Novel energy storage system's battery module includes a plurality of electric cabinets and master control case, owing to need test electric cabinet before dispatching from the factory, and current test mode is that Manual operation isolator after the cabinet is opened, or the Manual maintenance Switch handle (Manual Switch disconnect, MSD) of pulling out after the cabinet is opened, then overhauls, debugs, tests.

However, the above test method may cause great personal safety hazards to on-site maintainers, testers and the like, and the test risk is high.

Disclosure of Invention

Based on the above problem, the present application provides a safety protection method for an energy storage system and an energy storage system.

In a first aspect, the present application provides a safety protection method for an energy storage system, where the energy storage system is provided with a plurality of function keys, and different function keys correspond to different safety protection functions, and the method includes:

acquiring a trigger operation of a target function key in a plurality of function keys;

and responding to the trigger operation, and executing power-off protection operation corresponding to the target function key on the energy storage system.

According to the technical scheme, the electric cabinet or the container in the energy storage system is subjected to the power-off operation according to the trigger operation aiming at the power-off test scenes with different requirements, so that the electric cabinet fault isolation and the safety protection under different scene modes are realized, and the risk of electric shock caused by opening the cabinet is avoided when a tester tests and overhauls the electric cabinet.

In some embodiments, in response to the triggering operation, performing a power-down protection operation corresponding to the target function key on the energy storage system, including:

determining the type of the target function key in response to the trigger operation;

and executing power-off protection operation corresponding to the target function key on the energy storage system according to the type of the target function key.

According to the technical scheme, different power-off protection operations are determined according to different target types, so that the power-off protection operations are more targeted, and the safety of overhaul testing is guaranteed.

In some embodiments, according to the type of the target function key, performing a power-down protection operation corresponding to the target function key on the energy storage system, including:

and if the type of the target function key is the single-electric-cabinet power-off key, executing power-off operation on the target electric cabinet corresponding to the single-electric-cabinet power-off key in the energy storage system.

In the technical scheme of this application embodiment, can conveniently operate arbitrary one needs the electric cabinet of overhauing, the electricity has more the pertinence under the electric cabinet, avoids causing human potential safety hazard problem to maintainer, the tester etc. at scene.

In some embodiments, before performing the power-off operation on the target electrical cabinet corresponding to the power-off key of the single electrical cabinet in the energy storage system, the method further includes:

detecting whether a power-down signal corresponding to a power-down key of the single electric cabinet is effective or not;

correspondingly, the electric operation under to the target electricity cabinet that single electric cabinet in the energy storage system power-off button corresponds carries out, includes:

and under the condition that the lower electric signal corresponding to the lower electric key of the single electric cabinet is effective, the lower electric operation is executed on the target electric cabinet corresponding to the lower electric key of the single electric cabinet in the energy storage system.

In the technical scheme of this application embodiment, under the effectual condition of the lower signal of telecommunication that single electric cabinet is electrified to be pressed the button and is corresponded, carry out the processing of the electricity that is electrified of single electric cabinet, improved the flexibility and the security of the electric cabinet operation of electrifying.

In some embodiments, the method further comprises:

detecting whether a full container power-off signal exists or not under the condition that the power-off signal corresponding to the single electric cabinet power-off key is invalid;

and if the full container power-off signal is not detected, executing power-on operation on a target electric cabinet corresponding to the single electric cabinet power-off key in the energy storage system.

In the technical scheme of this application embodiment, under the condition of signal of telecommunication under not detecting single electric cabinet, and not detect signal of telecommunication under the full container, go up the power-on operation to electric cabinet, realized the automation of electricity about the electric cabinet.

In some embodiments, according to the type of the target function key, a power-down protection operation corresponding to the target function key is performed on the energy storage system, and the power-down protection operation includes:

and if the type of the target function key is a full container power-off key, performing power-off operation on all the electric cabinets in the energy storage system.

In the technical scheme of this application embodiment, through the full container electricity key that goes down of an arbitrary electric cabinet, realize the electricity operation of going down to all electric cabinets in the energy storage system, improved the security and the efficiency of electric cabinet test.

In some embodiments, before performing the power down operation on all of the electrical cabinets in the energy storage system, the method further comprises:

detecting whether a power-down signal corresponding to a power-down key of the full container is effective or not;

correspondingly, the whole electricity cabinets in the energy storage system are subjected to the electricity discharging operation, and the method comprises the following steps:

and under the condition that the lower electric signals corresponding to the full container power-down keys are effective, all the electric cabinets in the energy storage system are subjected to power-down operation.

In the technical scheme of this application embodiment, carry out the lower electricity of whole electric cabinets under the effectual condition of lower signal of telecommunication that the electricity button corresponds under full container, improved the security and the efficiency of electric cabinet test.

In some embodiments, the method further comprises:

detecting whether a single-electric-cabinet power-off signal exists or not under the condition that the power-off signal corresponding to the full-container power-off key is invalid;

and if the single electric cabinet power-off signal is not detected, executing power-on operation on a target electric cabinet corresponding to the full container power-off key in the energy storage system.

In the technical scheme of this application embodiment, under the invalid condition of the lower signal of telecommunication that the electricity button corresponds under full container, and not detect the signal of telecommunication under the single electric cabinet, go up the electric operation to the electric cabinet that the electricity button corresponds under full container, realized the automation of electricity about the electric cabinet.

if the type of the target function key is a travel switch, detecting whether a power failure prohibition key in the plurality of function keys is triggered;

and if the power failure prohibition key is not triggered, performing power-off operation on a target electric cabinet corresponding to the travel switch in the energy storage system.

In the technical scheme of this application embodiment, can be applied to the condition of not carrying out the key operation, the direct application scene of opening the cabinet and overhauing richens the test scene of overhauing, provides diversified selection for the maintainer, and the flexibility is higher.

In some embodiments, the plurality of function keys further includes a power down disable key; the method further comprises the following steps:

and under the condition that the power-down prevention key is triggered, if the cabinet opening operation is detected, the power-down protection operation is prohibited to be executed.

According to the technical scheme, the power down button is forbidden, so that the electric cabinet is kept normal in the open cabinet state, the special test scene in the electric cabinet maintenance can be applied, and the test scene is enriched.

In some embodiments, the plurality of function keys further includes a resume key, the method further comprising:

and under the condition that the recovery key is triggered, the safety control loop corresponding to the target electric cabinet corresponding to the recovery key is conducted, and the power-on operation is executed on the target electric cabinet corresponding to the recovery key in the energy storage system.

In the technical scheme of the embodiment of the application, the automation of power-on control is realized by forbidding the power-off button.

In a second aspect, the application further provides an energy storage system, where the energy storage system includes a plurality of parallel electric cabinets, each electric cabinet includes a safety protection circuit, and the safety protection circuit is provided with a plurality of function keys and a battery cluster management unit; each function key corresponds to different safety protection functions;

and the safety protection circuit is used for acquiring the trigger operation of a target function key in the plurality of function keys, responding to the trigger operation through the battery cluster management unit and executing the power-off protection operation corresponding to the target function key on the energy storage system.

According to the technical scheme, the battery cluster management unit performs power-off operation on the electric cabinet or the container in the energy storage system according to triggering operation, so that fault isolation and safety protection of the electric cabinet in different scene modes are realized, and the risk of electric shock caused by opening the cabinet is avoided when a tester tests and overhauls the electric cabinet.

In some embodiments, the safety circuit includes a first relay;

the first relay is used for closing the normally open contact under the condition that the type of the target function key is a single-cabinet power-off key;

and the battery cluster management unit is used for executing power-off operation on a target electric cabinet corresponding to the power-off key of the single electric cabinet in the energy storage system after the normally-open contact is closed by the first relay.

Among the technical scheme of this application embodiment, by the battery cluster administrative unit to this single electric cabinet operation of cutting off the electricity, can conveniently operate an arbitrary electric cabinet that needs to overhaul, avoid causing personal potential safety hazard problem to maintainer, the tester etc. at scene.

In some embodiments, the energy storage system further comprises a container master, and the safety protection circuit further comprises a second relay;

the second relay is used for closing the normally open contact under the condition that the type of the target function key is the full-container power-off key;

the battery cluster management unit is used for executing power-off operation on a target electric cabinet corresponding to a full container power-off key in the energy storage system after the second relay closes the normally open contact, and sending a full power-off electric signal to the container master control box;

and the container master control box is used for performing power-off operation on other electric cabinets in the energy storage system.

In some embodiments, the plurality of function keys includes a power down disable key;

and the battery cluster management unit is also used for executing power-off operation on a target electric cabinet corresponding to the travel switch in the energy storage system under the condition that the type of the target function key is the travel switch and the power failure prohibition key is not triggered.

In the technical scheme of this application embodiment, be applied to the condition of not carrying out the key operation, the application scene of direct unbooking maintenance richens the maintenance test scene, provides diversified selection for the maintainer, and the flexibility is higher.

In some embodiments, the plurality of function keys further includes a restore key, and the safety protection circuit further includes a third relay;

the third relay is used for disconnecting the normally closed contact under the condition that the recovery key is triggered;

and the battery cluster management unit is used for performing electrifying operation on the target electric cabinet corresponding to the recovery key in the energy storage system after the normally closed contact of the third relay is disconnected.

In the technical scheme of this application embodiment, charge to electric cabinet through function button and battery cluster management unit, realize the automation of the power-on control of electric cabinet and container.

In some embodiments, the energy storage system further comprises a plurality of loop protection relays, and the loop protection relays are connected with the electric cabinets in a one-to-one correspondence manner;

and the loop protection relay is used for performing an opening operation in the process of power-off protection operation or performing a closing operation in the process of power-on operation.

According to the technical scheme, the power-on operation and the power-off protection operation of the energy storage system are realized through the loop protection relay, the impact on the loop is effectively avoided, and the electric spark is prevented.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the alternative embodiments. The drawings are only for purposes of illustrating alternative embodiments and are not to be construed as limiting the application. Moreover, like reference numerals are used to refer to like elements throughout. In the drawings:

FIG. 1 is a schematic diagram of a storage submodule according to an embodiment of the present application;

fig. 2 is a schematic flow chart of a safety protection method of an energy storage system according to an embodiment of the present application;

FIG. 3 is a diagram of a function key according to an embodiment of the present application;

fig. 4 is a schematic flowchart illustrating a power-down protection operation performed on an energy storage system corresponding to a target function key according to an embodiment of the present application;

fig. 5 is a schematic flowchart of a target electrical cabinet power-off protection operation performed on the energy storage system corresponding to the travel switch according to an embodiment of the present application;

FIG. 6 is a schematic flow chart illustrating a method for safeguarding an energy storage system according to another embodiment of the present application;

fig. 7 is a block diagram of an energy storage system according to an embodiment of the present application;

fig. 8 is a schematic circuit diagram of an energy storage system according to an embodiment of the present application.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present application more clearly, and therefore are only used as examples, and the protection scope of the present application is not limited thereby.

Because in energy storage system, need test or debug the electric cabinet in the energy storage system before leaving the factory, in case the tester test of opening the cabinet, have the risk of high-pressure electric shock, brought very big potential safety hazard problem for the staff that tests and overhauls. The application provides an energy storage system's safety protection method and energy storage system, under the test scene of difference, through obtaining the trigger operation to the target function button in a plurality of function buttons, thereby in response to the trigger operation, carry out the lower electric protection operation that corresponds with the target function button to energy storage system, because different function buttons correspond different safety protection functions, after triggering different function buttons, can realize electric cabinet fault isolation and safety protection under the different scene modes, avoid the tester when testing the electric cabinet and overhaul the risk that the cabinet was opened and is electrocuted.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing the association object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural pieces" refers to two or more (including two).

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

The following problems exist with current energy storage systems: for example, the investment cost is high due to mutual independence of the converters and the energy storage batteries in the energy storage system, oscillation is easily generated when a plurality of converters are connected in parallel, the electric energy conversion efficiency of the two-level/three-level converters is low, and a large number of batteries are connected in series and parallel, so that a battery management unit has very strong battery management capacity, three-phase imbalance of a 10kV power distribution network, common and serious line overload/light load problems and the like.

In order to solve the problems, the novel energy storage system is produced by the aid of the method, the novel energy storage system has the advantages of flexibly regulating and controlling output power of the energy storage system, optimizing battery pack management capacity, eliminating grid-connected harmonic waves, reducing investment cost, reducing direct-current voltage born by a battery and the requirement of a battery management unit on battery tube control capacity, along with lower system grid loss, better economic benefit and higher operational reliability. According to the current topological mode of the main energy storage flow, the direct current direct hanging, the alternating current direct hanging, the planning application of the safety and Stability Control system (VSC) combined Modular Multilevel Converter (MMC) energy storage mode combines the power module and the battery module to form the background of the energy storage sub-module, and the topological schematic diagram of the main energy storage sub-module is shown in fig. 1.

The conventional energy storage adopts mains supply to supply power to a control loop of the battery module in the figure 1, and the novel energy storage is that an energy storage electric cabinet is arranged on a valve tower, no mains supply is available, and the energy storage electric cabinet can only provide direct current to provide power for a main control box. In addition, the electric cabinets also need to be used as energy storage modules for charge and discharge control, and a Battery Cluster Management Unit (BCMU) of each electric cabinet controls whether the electric cabinet is connected to the main loop or not through a loop protection relay to perform power-on and power-off control.

Before leaving a factory, the electric cabinet needs to be tested or debugged, when a tester tests, the risk of high-voltage electric shock exists when the cabinet is opened, and the problem that how to improve the personal safety of the tester is always concerned; in addition, the future supply of goods electricity cabinet has operation, maintenance link, and how to guarantee the personal safety of field personnel and maintainer and the reliable operation of field is a problem worth considering.

The application provides a safety protection method of an energy storage system and the energy storage system, wherein the energy storage system is provided with a plurality of function keys, different function keys correspond to different safety protection functions, and the method comprises the steps of responding to trigger operation by acquiring the trigger operation of a target function key in the plurality of function keys and executing power-off protection operation corresponding to the target function key on the energy storage system. This application adopts the key operation of scene, sets up a plurality of function button on the electric cabinet, and each function button corresponds different safety protection function. According to the power-off test scenes of different requirements, the power-off operation is carried out on the electric cabinet or the container in the energy storage system according to the trigger operation by acquiring the trigger operation of different target function keys, so that the fault isolation and safety protection of the electric cabinet under different scene modes are realized, and the risk of electric shock caused by opening the cabinet when a tester tests and overhauls the electric cabinet is avoided.

According to some embodiments of the present application, referring to fig. 2, there is provided a safety protection method of an energy storage system, the safety protection method comprising the steps of:

s201, acquiring trigger operation of a target function key in the plurality of function keys.

Wherein, be provided with a plurality of function button in the energy storage system, different function button correspond different safety protection functions. Optionally, as shown in fig. 3, the function key may be a single-electric cabinet power-down key, a full container power-down key, a recovery key, a power failure prohibition key, a travel switch, or the like. The single-electric cabinet power-off key target function key can be any one of a single-electric cabinet power-off key, a full container power-off key, a travel switch and the like which can trigger power-off operation.

In the embodiment of the application, when the function keys are arranged in the energy storage system, distributed setting may be adopted, centralized setting may also be adopted, or a combination of distributed and centralized setting may be adopted. For example, a plurality of function keys can be arranged on a screen cabinet of an electric cabinet in a distributed arrangement mode, for example, the single electric cabinet power-off key, the full container power-off key, the recovery key, the power failure prohibition key and the like can be used for preventing misoperation of the plurality of function keys through a lockset. Under the condition that the tester applies for work permission such as maintenance, test, operation, take the key, unblank, then just can carry out the key-operated. The centralized arrangement can arrange a plurality of function keys on a container of the energy storage system, or arrange a control box of the function keys in the energy storage system, arrange the function keys in the control box, and the like, wherein each function key corresponds to a different electric cabinet.

Furthermore, the function keys can also comprise a travel switch, and the cabinet opening is directly triggered to operate by a maintainer.

In some possible implementation manners, when the target function key is triggered, the battery cluster management unit in the energy storage system may detect an electrical signal in a circuit where different target function keys are located, so as to obtain a triggering operation of the target function key.

And S202, responding to the trigger operation, and executing power-off protection operation corresponding to the target function key on the energy storage system.

In the embodiment of the application, the battery cluster management unit responds to the triggering operation of the target function key and executes the power-off protection operation corresponding to the target function key on the energy storage system. The circuit simulation method can be a pure software implementation mode, a circuit schematic diagram is converted into a command file by using circuit simulation software in a computer, then calculation is carried out according to a circuit equation, and circuit simulation is carried out by using the software; or a pure digital circuit implementation mode, a circuit for processing input digital signals; or may be a purely analog circuit implementation; or a digital/analog mixed circuit implementation mode, namely an analog circuit and a digital control circuit.

In some embodiments, a loop protection relay or a switch may be directly disposed between the battery cluster management unit and the electrical cabinet corresponding to the target function key, and if the battery cluster management unit detects an electrical signal of a loop where the target function key is located, the loop protection relay is controlled to be turned off or the switch is controlled to be turned off, so as to implement a power-off protection operation corresponding to the target function key on the energy storage system.

According to the safety protection method of the energy storage system, the energy storage system is provided with the plurality of function keys, different function keys correspond to different safety protection functions, and the method responds to the trigger operation by acquiring the trigger operation of a target function key in the plurality of function keys and executing power-off protection operation corresponding to the target function key on the energy storage system. This application adopts the key operation of scene, sets up a plurality of function button on the electric cabinet, and each function button corresponds different safety protection function. According to the power-off test scenes of different requirements, the power-off operation is carried out on the electric cabinet or the container in the energy storage system according to the trigger operation by acquiring the trigger operation of different target function keys, so that the fault isolation and safety protection of the electric cabinet under different scene modes are realized, and the risk of electric shock caused by opening the cabinet when a tester tests and overhauls the electric cabinet is avoided.

According to some embodiments of the present application, referring to fig. 4, fig. 4 is a schematic flowchart illustrating a power-down protection operation corresponding to a target function key performed on an energy storage system in response to a trigger operation in one embodiment, and includes the following steps:

s401, responding to the trigger operation, and determining the type of the target function key.

In the embodiment of the application, a plurality of wiring terminals or interfaces are arranged on a battery cluster management unit in the energy storage system, and each wiring terminal or interface is connected with different function keys in a loop respectively. Assuming that the types of the target function keys include A1, A2, and A3, a connection terminal B1 is provided in a loop corresponding to the target function key A1, a connection terminal B2 is provided in a loop corresponding to the target function key A2, and a connection terminal B3 is provided in a loop corresponding to the target function key A3. The battery cluster management unit may detect electrical signals at the connection terminal B1, the connection terminal B2, and the connection terminal B3, respectively, and determine that the trigger operation is from the target function key A1 if the signal at the connection terminal B1 is detected to be changed from a low level to a high level.

On the other hand, the number of types of the target function keys may be set to be greater than the number of connection terminals or interfaces. For example, the types of the target function key include A1, A2, and A3, and the connection terminal B1 is provided in the loop corresponding to the target function key A1, and the connection terminal B2 is provided in the loop corresponding to the target function key A2. The battery cluster management unit may detect electrical signals at the connection terminals B1 and B2, respectively, and determine that the triggering operation is from the target function key A3 if the signals at the connection terminals B1 and B2 are changed from high level to low level.

And S402, executing power-off protection operation corresponding to the target function key on the energy storage system according to the type of the target function key.

In this embodiment, according to the type of the target function key, a power-down protection operation corresponding to the target function key is performed on the energy storage system. For example, when the type of the target function key is a single-battery-cabinet power-off key, only the power-off operation needs to be executed on the target battery cabinet corresponding to the single-battery-cabinet power-off key in the energy storage system; when the type of the target function key is a full container power-off key, all the electric cabinets in the energy storage system need to be powered off.

In the above embodiment, first, the type of the target function key is determined in response to the trigger operation, so that the power-off protection operation corresponding to the target function key is executed on the energy storage system according to the type of the target function key. Different power-off protection operations are determined according to different target types, so that the power-off protection operations are more targeted, and the safety of overhaul testing is ensured.

According to some embodiments of the application, a power-down protection operation corresponding to the target function key is executed on the energy storage system according to the type of the target function key. The types of the "target function key include the following three different types.

The first type is as follows: and if the type of the target function key is the single-electric-cabinet power-off key, executing power-off operation on the target electric cabinet corresponding to the single-electric-cabinet power-off key in the energy storage system.

In this embodiment, when the type of the target function key is the single-cabinet power-off key, the battery cluster management unit may control the battery cluster management unit to perform circuit disconnection with a mechanical switch between the target electrical cabinets corresponding to the single-cabinet power-off key, so as to implement power-off operation of the target electrical cabinets corresponding to the single-cabinet power-off key in the energy storage system.

In some possible implementation manners, a current fuse can be further controlled to be arranged between the battery cluster management unit and a target electric cabinet corresponding to the single-electric-cabinet power-off key, when the type of the target function key is the single-electric-cabinet power-off key, the battery cluster management unit outputs a large current, the current fuse is fused, and power-off operation of the target electric cabinet corresponding to the single-electric-cabinet power-off key in the energy storage system is achieved.

In the above embodiment, when the type of target function button is single electric cabinet power-off button, the power-off operation is carried out to the target electric cabinet that single electric cabinet power-off button corresponds in the energy storage system, can conveniently operate any electric cabinet that needs to be overhauled, and the power-off of electric cabinet has more pertinence, avoids causing human body potential safety hazard problems to on-site maintainers, testers and the like.

According to some embodiments of the present application, before the "performing power down operation on the target electrical cabinet corresponding to the power down key of the single electrical cabinet in the energy storage system", the method further includes: detect single electric cabinet and go down the electric signal of telecommunication that electric button corresponds and whether effective, correspondingly, to all electric cabinets among the energy storage system execution electric operation down, include: and under the condition that the lower electric signal corresponding to the lower electric key of the single electric cabinet is effective, the lower electric operation is executed on the target electric cabinet corresponding to the lower electric key of the single electric cabinet in the energy storage system.

In this embodiment of the application, the battery cluster management unit may perform voltage and current detection on the interface corresponding to the single-battery-cabinet power-off key, and if the interface corresponding to the single-battery-cabinet power-off key detects a current signal, it is proved that the power-off signal corresponding to the single-battery-cabinet power-off key is valid. And under the condition that the power down signal is effective, the battery cluster management unit executes power down operation on a target electric cabinet corresponding to the power down key of the single electric cabinet in the energy storage system.

Further, detecting whether the full container power-off signal exists or not under the condition that the power-off signal corresponding to the single electric cabinet power-off key is invalid; and if the full container power-off signal is not detected, executing power-on operation on a target electric cabinet corresponding to the single electric cabinet power-off key in the energy storage system.

The full container power-off signal can be a full container power-off signal generated by triggering the full container power-off key of the other electric cabinets except the target electric cabinet corresponding to the single electric cabinet power-off key, or a full container power-off signal generated by triggering the full container power-off key of the target electric cabinet corresponding to the single electric cabinet power-off key.

If no current signal is detected at the interface corresponding to the single-electric-cabinet power-down key, the power-down signal corresponding to the single-electric-cabinet power-down key is proved to be invalid, and at this time, the battery cluster management unit needs to further detect whether a full-container power-down signal exists in the electric cabinet (the target electric cabinet corresponding to the single-electric-cabinet power-down key). And if the full container power-off signal is not detected, executing power-on operation on a target electric cabinet corresponding to the single electric cabinet power-off key in the energy storage system.

In some possible implementation manners, if the power-down signal corresponding to the power-down key of the single power cabinet is invalid, the target power cabinet corresponding to the power-down key of the single power cabinet does not detect the power-down signal of the full container, and meanwhile, the power-down signals of the other power cabinets (the power-down signal corresponding to the power-down key of the other power cabinets and the power-down signal of the full container) do not exist in the other power cabinets except the target power cabinet corresponding to the power-down key of the single power cabinet, the power-up operation can be executed on all the power cabinets.

In the above embodiment, whether the lower electric signal corresponding to the lower electric key of the single electric cabinet is valid is detected, the lower electric operation is performed on the target electric cabinet corresponding to the lower electric key of the single electric cabinet in the energy storage system under the condition that the lower electric signal corresponding to the lower electric key of the single electric cabinet is valid, whether the lower electric signal of the full container exists is further detected under the invalid condition, and if the lower electric signal of the full container is not detected, the upper electric operation is performed on the target electric cabinet corresponding to the lower electric key of the single electric cabinet in the energy storage system. The electric signal is effectual under the corresponding lower electric signal of single electric cabinet key that makes an uproar under this embodiment, carries out the processing of making an uproar under the single electric cabinet, has improved the flexibility and the security of the electric operation under the electric cabinet. Under the condition of not detecting signal of telecommunication under the single electric cabinet, and not detecting signal of telecommunication under the full container, go up the electric operation to electric cabinet, realized that electric cabinet is from top to bottom automatic.

According to some embodiments of the present application, the second type of the "performing the power down protection operation corresponding to the target function key on the energy storage system according to the type of the target function key" is: and if the type of the target function key is a full container power-off key, performing power-off operation on all the electric cabinets in the energy storage system.

In this application embodiment, if single electric cabinet breaks down, it is great to whole electric cabinets among the energy storage system influence, and even great to whole energy storage system influence, or there are a plurality of electric cabinets to break down, need go on to all electric cabinets and descend the electricity.

In some embodiments, in a case that the type of the target function key is a full container power-down key, the target electrical cabinet corresponding to the full container power-down key may be powered down first, and then the full container power-down signal is sent to the container master control box, the container master control box sends the full container power-down signal to the battery cluster management units corresponding to the other electrical cabinets, and the battery cluster management units corresponding to the other electrical cabinets power down the electrical cabinets.

In this embodiment, in the case that the type of the target function key is a full-container power-down key, a plurality of control power-down loops may be further included. The battery cluster management unit of each electric cabinet is connected with all the electric cabinets, when the battery cluster management unit of any one of the electric cabinets detects an electric signal under the full container, all the electric cabinets are powered off by controlling the plurality of control power-off loops, and power-off operation of all the electric cabinets in the energy storage system is realized.

In the above embodiment, when the type of the target function key is the full container power-off key, the power-off operation is performed on all the electric cabinets in the energy storage system. The full container of an arbitrary electric cabinet in this application is electric the button down, realizes the electric operation down to all electric cabinets in the energy storage system, has improved the security and the efficiency of electric cabinet test.

According to some embodiments of the present application, the third type of performing the power down protection operation on the energy storage system corresponding to the target function key according to the type of the target function key is: as shown in fig. 5, the method comprises the following steps:

s501, if the type of the target function key is a travel switch, whether a power-down prohibition key in the plurality of function keys is triggered is detected.

In the embodiment of the application, when the type of the target function key is a travel switch, that is, a maintainer triggers the travel switch through a cabinet opening action, at this time, two situations of power failure during cabinet opening and power failure during cabinet opening exist, and therefore, whether a power failure prohibition key in a plurality of function keys is triggered needs to be detected. The specific implementation manner may be that, in the manner in embodiment S401, the electrical signal at the connection terminal corresponding to the power down prohibition key is detected, and whether the power down prohibition key in the plurality of function keys is triggered is detected.

And S502, if the power failure prohibition key is not triggered, performing power-off operation on a target electric cabinet corresponding to a travel switch in the energy storage system.

In the embodiment of the present application, the specific implementation manner may refer to the specific implementation manner of "if the type of the target function key is the single-electrical-cabinet power-off key, performing power-off operation on the target electrical cabinet corresponding to the single-electrical-cabinet power-off key in the energy storage system.

In the above embodiment, when the type of the target function key is the travel switch and the power down prohibition key is not triggered, the power down operation is performed on the target electric cabinet corresponding to the travel switch in the energy storage system. This application can be applied to the condition of not carrying out button operation, and the application scene that direct uncork overhauld richenes the maintenance test scene, provides diversified selection for the maintainer, and the flexibility is higher.

According to some embodiments of the application, before the "power down operation is performed on all the electric cabinets in the energy storage system", the method further includes: detect full container and go down the lower signal of telecommunication that electricity button corresponds and whether effective, correspondingly, to all electric cabinets execution under among the energy storage system electric operation, include: and under the condition that the lower electric signals corresponding to the full container power-down keys are effective, all the electric cabinets in the energy storage system are subjected to power-down operation.

In this application embodiment, the battery cluster management unit can carry out voltage and current detection to the interface that single electric cabinet power down button corresponds, if the battery cluster management unit detects the current signal that full container power down button corresponds in binding post department on the battery cluster management unit that corresponds, then carry out power down to the target electric cabinet that full container power down button corresponds, and send this power down signal for full container, send the power down signal to the battery cluster management unit of other electric cabinets by full container, realize the power down processing to other electric cabinets, thereby accomplish the power down processing of all electric cabinets.

Further, detecting whether the single-electric-cabinet power-off signal exists or not under the condition that the power-off signal corresponding to the full-container power-off key is invalid; and if the single electric cabinet power-off signal is not detected, executing power-on operation on a target electric cabinet corresponding to the full container power-off key in the energy storage system.

In some possible implementation manners, if the power-off signal corresponding to the full container power-off key is invalid, the battery cluster management unit detects whether the target electric cabinet corresponding to the full container power-off key has the power-off signal of the single electric cabinet, and if the power-off signal of the single electric cabinet is not detected, the power-on operation is executed on the target electric cabinet corresponding to the full container power-off key in the energy storage system.

Similarly, if no power-off signal exists in the rest of the electric cabinets, all the electric cabinets can be powered on.

In the above embodiment, by detecting whether the power-off signal corresponding to the power-off key of the full container is valid, the power-off operation is performed on all the power cabinets in the energy storage system under the condition that the power-off signal corresponding to the power-off key of the full container is valid, and the power-on operation is performed on the target power cabinet corresponding to the power-off key of the full container in the energy storage system under the invalid condition that the power-off signal corresponding to the power-off key of the single power cabinet is not detected. In this embodiment, through detecting whether the signal of telecommunication is effective down, carry out the electricity processing down to whole electric cabinets, improved the efficiency of electricity processing down, only when not satisfying the electricity operation down simultaneously moreover, go up the electricity to all electric cabinets of energy storage system or the electric cabinet of target that corresponds, improved the security of electric cabinet test.

According to some embodiments of the application, the plurality of function keys further include a power-down prohibition key, and under the condition that the power-down prohibition key is triggered, if a cabinet opening operation is detected, the power-down protection operation is prohibited to be executed.

In the embodiment of the application, when the power down prohibition key is triggered, if a cabinet opening operation is detected, the battery cluster management unit does not execute any safety protection power down operation, that is, a path is maintained between the battery cluster management unit and a target electric cabinet corresponding to the power down prohibition key.

In the above embodiment, under the condition that the power down key is prohibited from being triggered, if the cabinet opening operation is detected, the power down protection operation is prohibited from being executed, and the method and the device can be applied to a special test scene in electric cabinet maintenance, and enrich the test scene.

According to some embodiments of the application, the plurality of function keys further include a recovery key, and when the recovery key is triggered, the safety control loop corresponding to the target electric cabinet corresponding to the recovery key is conducted, and the target electric cabinet corresponding to the recovery key in the energy storage system is powered on.

In the embodiment of the application, under the condition that the recovery key is triggered, the battery cluster management unit conducts the safety control loop corresponding to the target electric cabinet corresponding to the recovery key, and performs power-on operation on the target electric cabinet corresponding to the recovery key in the energy storage system. Alternatively, the safety control circuit may be a mechanical switch, may be a circuit protection relay, or the like.

Further, if only one electric cabinet is overhauled at the same time, after a recovery key of the electric cabinet is triggered, all the electric cabinets of the full container can be electrified.

In the above embodiment, under the condition that the recovery key is triggered, the safety control loops corresponding to the electric cabinets are conducted, and the power-on operation is performed on the target electric cabinet corresponding to the recovery key in the energy storage system, so that the automation of the power-on control is realized.

Referring to fig. 6, a flow diagram of a particular implementation of a method of safeguarding is provided in accordance with some embodiments of the present application to facilitate understanding by those skilled in the art.

In the embodiment of the present application, when the electrical cabinet is powered on, the battery cluster management unit (i.e., BCMU in fig. 6) performs power down by using the logic of each power down condition. If a plurality of function keys are pressed down, the BCMU adopts a 'power-off priority strategy', namely, all the function keys are checked during power-on, and the power-on of the electric cabinet is carried out only when no power-off command exists.

When the recovery key is pressed down, the coil FGJ is electrified and attracted, the corresponding normally closed contact FGJA, normally closed contact FGJB and normally closed contact FGJC are opened, the normally closed contact FGJA, normally closed contact FGJB and normally closed contact FGJC keep loops, and the loops where the normally closed contacts are located are disconnected due to the fact that the loops are not electrified and self-holding is cancelled.

BCMU detects the recovery key according to the period, when BCMU detects that the recovery key is triggered and no lower electric signal is issued by the container master control box, the target electric cabinet corresponding to the recovery key is powered on. Further, if only one electric cabinet is maintained, after the triggering operation of the recovery key is obtained, the full-electric-cabinet power-on signal can be sent at the same time, the container master control box carries out power-on signals of all the electric cabinets (no electric cabinet has a power-off command of the electric cabinet), and if the power-off operation triggered by any electric cabinet target function key exists, the full-container master control box does not send the full-electric-cabinet power-on command.

When the single-electric-cabinet power-off key is pressed down, after the coil HJ is electrified and sucked, the corresponding normally open contact HJA is closed to carry out power supply self-holding, the BCMU detects the single-electric-cabinet power-off key periodically, the BCMU detects the single-electric-cabinet power-off signal, and power off is carried out according to a power-off priority strategy. Specifically, the BCMU opens a loop protection relay of the electric cabinet, and a target electric cabinet corresponding to the single electric cabinet power-off key is powered off; if the single electric cabinet power-off signal is invalid, judging whether a full container power-off signal exists, if the full container power-off signal does not exist, closing a loop by a BCMU to protect a relay, and powering on an electric cabinet corresponding to a single electric cabinet power-off key; and if the full container electric signal is available, the electric cabinet is not electrified until the full container electric signal is unavailable, and the electric cabinet is electrified.

When the full container power-off key is pressed down, the coil QHJ is electrified and instantaneously attracts, the closed normally-open contact QHJA is self-maintained, the BCMU detects the key periodically, the BCMU detects a full container power-off signal, the BCMU opens a loop protection relay of a target electric cabinet corresponding to the full container power-off key, the target electric cabinet powers off, meanwhile, the power-off signal is sent to the container main control box, and the container main control box sends the power-off signal to BCMU corresponding to other electric cabinets to carry out full container power-off. If the BCMU detects that the full container power-off signal exits, the BCMU does not receive the power-off signal sent by the full container main control box, and the BCMU closes the loop protection relay of the electric cabinet when the BCMU does not have any power-off signal, so that the electric cabinet is powered on. And meanwhile, the power-on signal is sent to the full-container main control box, the full-container main control box is powered on according to the logical AND operation of the power-on signal, and if any power-off signal of the electric cabinet exists, the full-container main control box does not send all power-on commands.

When the power failure prevention button is pressed down, the coil BSJ is electrified and closed to be attracted, the normally open node contact BSJA is closed to conduct power failure self-maintenance, the normally closed node BSJB is opened, the travel switch loop is disconnected, the loop where the travel switch is located fails at the moment, the power failure prevention test environment is provided, and on the basis of achieving fault isolation and safety protection, the power failure prevention test environment has an application scenario of special test for power failure prevention during cabinet opening.

If the travel switch does not act during normal cabinet opening, the cabinet is withdrawn; if the travel switch acts, the travel switch node is closed, and the power failure prohibition key is not triggered at the moment, the BCMU detects a travel switch signal, the loop protection relay is opened, and the electric cabinet is powered off; and if the power failure key is forbidden to be triggered, the travel switch loop is invalid.

According to some embodiments of the present application, referring to fig. 7, a block diagram of an energy storage system is provided, where the energy storage system 100 includes a plurality of parallel electric cabinets, each electric cabinet includes a safety protection circuit 1, and the safety protection circuit is provided with a plurality of function keys 10 and a battery cluster management unit 20; each function key 10 corresponds to a different safety protection function; the safety protection circuit 1 is configured to obtain a trigger operation on a target function key of the plurality of function keys 10, and respond to the trigger operation through the battery cluster management unit 20 to perform a power-down protection operation corresponding to the target function key on the energy storage system 100.

In the embodiment of the present application, as shown in fig. 7, the energy storage system 100 includes a plurality of electrical cabinets connected in parallel, each electrical cabinet includes a safety protection circuit 1, the safety protection circuit 1 includes a plurality of function keys 10 and a battery cluster management unit 20, and each battery cluster management unit 20 controls one electrical cabinet.

In some possible implementation manners, the safety protection circuit is provided with a plurality of function keys 10, since each function key 10 corresponds to a different safety protection function, when triggering a different function key 10, a different trigger signal is obtained in the safety protection circuit, and the battery cluster management unit 20 responds to the trigger operation to execute the power-off protection operation corresponding to the target function key on the energy storage system 100.

Optionally, the safety protection circuit 1 may include a switch, and in a case that the target function key is triggered, the safety protection circuit 1 obtains the trigger operation on the target function key in the plurality of function keys 10 by closing or opening the switch on the circuit where the target function key is located.

Optionally, the safety protection circuit 1 may further include an MOS transistor, and after the target function key is triggered, the safety protection circuit 1 obtains the triggering operation of the target function key by turning on or off the MOS transistor of the circuit in which the target function key is located.

Optionally, the safety protection circuit 1 may further include a diode, and after the target function key is triggered, the diode is turned on or off by applying a forward or reverse voltage to an anode and a cathode of the diode, so as to obtain a triggering operation of the target function key.

Optionally, the safety protection circuit 1 may further include a relay, and when the target function key is triggered, the safety protection circuit 1 closes a normally open contact of the relay on a circuit where the target function key is located, or opens the normally closed contact, so as to obtain a triggering operation of the target function key.

In the above embodiment, the safety protection circuit obtains the trigger operation on the target function key of the plurality of function keys, and responds to the trigger operation through the battery cluster management unit to execute the power-off protection operation corresponding to the target function key on the energy storage system. This application battery cluster management unit carries out the electric operation down to electric cabinet or container in the energy storage system according to triggering operation to realize electric cabinet fault isolation and safety protection under the different scene mode, avoid the tester to examine and repair the risk of getting an electric shock of occasionally opening the cabinet to electric cabinet.

According to some embodiments of the present application, referring to fig. 8, there is provided a circuit schematic of an energy storage system, as shown in fig. 8, a safety protection circuit 1 includes a first relay; the first relay is used for closing the normally open contact under the condition that the type of the target function key is a single-cabinet power-off key; and the battery cluster management unit 20 is configured to perform power-off operation on a target electrical cabinet corresponding to the power-off key of the single electrical cabinet in the energy storage system 100 after the first relay closes the normally open contact.

In the embodiment of the present application, as shown in fig. 8, the first relay includes a coil HJ and a normally open contact HJA, and the single-cabinet power-off key is S1.

In this embodiment, when the type of the target function key is the single-electrical-cabinet power-down key S1, after the single-electrical-cabinet power-down key command is received in the single-electrical-cabinet power-down circuit in which the single-electrical-cabinet power-down key S1 is located, the coil HJ in the single-electrical-cabinet power-down circuit is powered on to generate the magnetic field, and at this time, the normally-open contact HJA is closed.

In some possible implementations, due to the existence of the resistor R1, the original low-level signal in the lower circuit loop of the single electric cabinet is converted into a high-level signal, and after detecting the high-level signal at the P1, the battery cluster management unit 20 starts to control the lower circuit loop of the target electric cabinet corresponding to the lower circuit loop of the single electric cabinet to be powered off, so that a person can overhaul and test the lower circuit loop.

In the above embodiment, when the type of the target function key is the single-battery-cabinet power-off key, the first relay closes the normally open contact, so that the battery cluster management unit performs power-off operation on the target electric cabinet corresponding to the single-battery-cabinet power-off key in the energy storage system after closing the normally open contact by the first relay. This application is triggering single electric cabinet and is cutting off the electricity button operation back, is gone on the electricity operation down to this single electric cabinet by battery cluster administrative unit, can conveniently operate arbitrary one electric cabinet that needs to overhaul, avoids causing people's personal potential safety hazard problem to maintainer, the tester etc. on-the-spot.

According to some embodiments of the present application, referring to fig. 8 above, the energy storage system 100 further includes a container master 2, and the safety protection circuit 1 further includes a second relay; the second relay is used for closing the normally open contact under the condition that the type of the target function key is the full-container power-off key; the battery cluster management unit 20 is configured to perform power-off operation on a target electric cabinet corresponding to a full container power-off key in the energy storage system 100 after the second relay closes the normally open contact, and send a full power-off signal to the container master control box 2; and the container master control box 2 is used for performing power-off operation on other electric cabinets in the energy storage system 100.

In the embodiment of the present application, as shown in fig. 8, the second relay includes the coil QHJ and the normally open contact QHJA, and the fully-integrated-box power-down button is S2.

The power supply of the battery cluster management unit 20 and the container main control box 2 adopts two modes for supplying power, one mode is that DC/DC voltage reduction is carried out from a direct-current high-voltage bus of the electric cabinet to 48V or 24V for supplying power, the other mode is that commercial power AC/DC is converted into 48V or 24V for supplying power, and dual power sources are controlled in a redundant mode. Because conventional energy storage adopts the commercial power supply, and novel high-pressure energy storage system adopts the self-power of electric cabinet, and the power supply mode that this application provided is applicable to many scenes application mode, both can be used to conventional energy storage and also can be used to novel energy storage.

Further, the energy storage system 100 further includes a container master control box 2, and the battery cluster management unit 20 and the container master control box 2 perform bidirectional communication, and have a function of transmitting control information and control instructions.

In some possible implementations, in the case that the type of the target function key is the full-container power-off key S2, after the full-container power-off loop where the full-container power-off key S2 is located receives the command of the full-container power-off key S2, since the FGJC is a normally closed contact, the coil QHJ is powered on to generate a magnetic field, and the second relay closes the normally open contact QHJA, the full-container power-off loop performs the holding of the full-container power-off electrical signal.

After the battery cluster management unit 20 detects a full container power-off signal at P2 (the level at P2 is changed from low level to high level), the target electrical cabinet corresponding to the full container power-off key S2 is controlled to perform power-off operation, and simultaneously, the full power-off signal is uploaded to the container main control box 2, the container main control box 2 sends the full power-off signal to the battery cluster management units 20 of other electrical cabinets, and the battery cluster management units 20 of other electrical cabinets control the electrical cabinets to perform power-off operation, so that full container power-off is realized.

In the above embodiment, when the type of the target function key is the full container power-off key, the second relay closes the normally open contact, and after the battery cluster management unit closes the normally open contact, the battery cluster management unit performs power-off operation on the target electrical cabinet corresponding to the full container power-off key in the energy storage system, and sends a full power-off signal to the container master control box, so that the container master control box performs power-off operation on other electrical cabinets in the energy storage system. The full container of an arbitrary electric cabinet in this application is electric the button down, realizes the electric operation down to all electric cabinets in the energy storage system, has improved the security and the efficiency of electric cabinet test.

According to some embodiments of the present application, referring to FIG. 8 above, the plurality of function keys includes a power down disable key; the battery cluster management unit 20 is further configured to, when the type of the target function key is a travel switch and it is detected that the power down prohibition key is not triggered, perform a power down operation on a target electrical cabinet corresponding to the travel switch in the energy storage system 100.

In the embodiment of the present application, as shown in fig. 8, the power down prohibition key is S4, the travel switch is S3, and the fourth relay includes a coil BSJ, a normally open contact BSJA, and a normally closed contact BSJB.

In this embodiment, when the type of the target function key is the travel switch S3, if the power down prohibition key S4 receives a key command for prohibiting power down for a power down prohibition loop in which the power down prohibition key S4 is located, since the FGJB is a normally closed contact, the coil BSJ is energized to generate a magnetic field, the fourth relay closes the normally open contact BSJA, the power down prohibition loop is prohibited from performing self-holding of the power down prohibition signal, the fourth relay opens the normally closed contact BSJB, at this time, the power down open loop in which the travel switch S3 is located fails, the battery cluster management unit 20 cannot detect the corresponding power down signal at P3, and the battery cluster management unit 20 detects the power down prohibition signal at P4.

In some possible implementation manners, if the power down prohibition key S4 is not pressed, that is, under the condition that the power down prohibition key S4 is not triggered, the normally closed contact BSJB is always in a closed state at this time, after a tester opens a cabinet, the travel switch S3 controls the closing of the power down circuit of the opened cabinet, and the battery cluster management unit 20 detects a corresponding power down signal at P3, performs power down operation on a target electric cabinet corresponding to the travel switch in the energy storage system, and realizes power down when the cabinet is opened.

In the above embodiment, when the type of the target function key is a travel switch and it is detected that the power down prohibition key is not triggered, the battery cluster management unit executes a power down operation on the target electric cabinet corresponding to the travel switch in the energy storage system. This application can be applied to the condition of not carrying out the key operation for temporarily not taking the key and can not carrying out the key operation, the direct application scene of opening the cabinet and overhauing richens the maintenance test scene, provides diversified selection for the maintainer, and the flexibility is higher.

According to some embodiments of the present application, referring to fig. 8 above, the plurality of function keys further includes a restore key, and the safety circuit further includes a third relay; the third relay is used for disconnecting the normally closed contact under the condition that the recovery key is triggered; and the battery cluster management unit 20 is configured to perform a power-on operation on the target electrical cabinet corresponding to the recovery key in the energy storage system 100 after the normally closed contact of the third relay is opened.

In the embodiment of the present application, as shown in fig. 8, the recovery button is S5, and the third relay includes a coil FGJ, a normally closed contact FGJA, a normally closed contact FGJB, and a normally closed contact FGJC.

In some possible implementation manners, when the type of the target function key is the recovery key S5, when the recovery key S5 is pressed, the recovery power-on circuit where the recovery key S5 is located receives a recovery key instruction, the coil FGJ is powered on to generate a magnetic field, the normally closed contact FGJA, the normally closed contact FGJB, and the normally closed contact FGJC of the third relay are switched from the normally closed state to the open state, the single cabinet power-off circuit corresponding to each normally closed contact FGJA, the power-down prohibition circuit corresponding to each normally closed contact FGJB, and the full container power-down circuit corresponding to each normally closed contact FGJC are powered off instantaneously, the self-holding circuit fails, and all the power-down signals detected by the battery cluster management unit 20 at P1, P2, and P4 are switched from the high level to the low level. Meanwhile, the battery cluster management unit 20 checks whether there is a full power-off signal requested by another electric cabinet issued by the container master control box 2, and if there is no full power-off signal requested by another electric cabinet issued by the container master control box 2, the power-on of the target electric cabinet corresponding to the recovery key is performed.

Further, if only one electric cabinet is overhauled at the moment, after the recovery key S5 of the electric cabinet is pressed, and the full-off electric signals of other electric cabinet requests issued by the container master control box 2 do not exist, all the electric cabinets can be electrified.

In the above embodiment, when the recovery button is triggered, the third relay opens the normally closed contact, and the battery cluster management unit performs the power-on operation on the target electrical cabinet corresponding to the recovery button in the energy storage system after the normally closed contact of the third relay is opened. Except realizing the electric operation of the electricity of above-mentioned electric cabinet in this application, still regard electric cabinet as energy storage module in addition, charge electric cabinet through function button and battery cluster management unit, realize the automation of the electric control of going up and down of electric cabinet and container.

According to some embodiments of the present application, referring to fig. 8 above, the energy storage system further includes a plurality of loop protection relays 3, and the loop protection relays 3 are connected to the electrical cabinets in a one-to-one correspondence;

and the loop protection relay 3 is used for performing an opening operation in the process of power-off protection operation or performing a closing operation in the process of power-on operation.

In the embodiment of the present application, as shown in fig. 8, the circuit protection relays 3 are connected to the electric cabinet in a one-to-one correspondence manner, each circuit protection relay 3 includes a switch K1, a switch K2, and a pre-charging resistor R2, and the switch K1 and the pre-charging resistor R2 are connected in series and then connected in parallel with the switch K2.

Specifically, the circuit protection relay 3 performs an opening operation during the power-off protection operation. The specific process can be that the switch K1 is closed first, then the switch K2 is opened, and finally the switch K1 is opened, and the switch K1 is connected with the pre-charging resistor R2 in series, so that the phenomenon that the switch K1 is directly opened to cause ignition is avoided.

Also, the circuit protection relay 3 performs a closing operation during the power-on operation. The specific process may be to close the switch K1, then close the switch K2, and finally open the switch K1.

In the above embodiment, the energy storage system further includes a plurality of loop protection relays, the loop protection relays are connected to the electrical cabinet in a one-to-one correspondence, and the loop protection relays are configured to perform an opening operation in a power-off protection operation process or perform a closing operation in a power-on operation process. According to the protection device, the circuit protection relay is used for realizing the power-on operation and the power-off protection operation of the energy storage system, the impact on the circuit is effectively avoided, and the electric spark is prevented.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, so as to understand the technical solutions of the present application in detail and in detail, but not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. It should be understood that the technical solutions provided by the present application, which are obtained by logical analysis, reasoning or limited experiments, are within the scope of the appended claims. Therefore, the protection scope of the present patent application shall be subject to the content of the appended claims, and the description and the drawings shall be used for explaining the content of the claims.

Claims

1. A safety protection method of an energy storage system is characterized in that a plurality of function keys are arranged in the energy storage system, and different function keys correspond to different safety protection functions; the method comprises the following steps:

acquiring a trigger operation of a target function key in the plurality of function keys;

and responding to the triggering operation, and executing power-off protection operation corresponding to the target function key on the energy storage system.

2. The method of claim 1, wherein the performing a power-down protection operation corresponding to the target function key on the energy storage system in response to the triggering operation comprises:

responding to the trigger operation, and determining the type of the target function key;

and executing a power-off protection operation corresponding to the target function key on the energy storage system according to the type of the target function key.

3. The method according to claim 2, wherein the performing, according to the type of the target function key, a power-down protection operation corresponding to the target function key on the energy storage system comprises:

and if the type of the target function key is a single-electric-cabinet power-off key, executing power-off operation on a target electric cabinet corresponding to the single-electric-cabinet power-off key in the energy storage system.

4. The method according to claim 3, wherein before the power-down operation is performed on the target electrical cabinet corresponding to the power-down key of the single electrical cabinet in the energy storage system, the method further comprises:

detecting whether a power-off signal corresponding to the power-off key of the single electric cabinet is effective or not;

correspondingly, to in the energy storage system the target electricity cabinet that single electricity cabinet power down button corresponds carries out power down operation, include:

and under the condition that the lower electric signal corresponding to the lower electric key of the single electric cabinet is effective, the target electric cabinet corresponding to the lower electric key of the single electric cabinet in the energy storage system is subjected to lower electric operation.

5. The method of claim 4, further comprising:

detecting whether a full container power-off signal exists or not under the condition that the power-off signal corresponding to the power-off key of the single electric cabinet is invalid;

6. The method according to claim 2, wherein the performing, according to the type of the target function key, a power-down protection operation corresponding to the target function key on the energy storage system comprises:

7. The method of claim 6, wherein prior to performing the power down operation on all of the electrical cabinets in the energy storage system, the method further comprises:

detecting whether a power-down signal corresponding to the power-down key of the full container is effective or not;

correspondingly, the step of performing the power-off operation on all the electric cabinets in the energy storage system comprises the following steps:

and under the condition that the lower electric signal corresponding to the full container power-down key is effective, performing power-down operation on all electric cabinets in the energy storage system.

8. The method of claim 7, further comprising:

9. The method according to claim 2, wherein the performing, according to the type of the target function key, a power-down protection operation corresponding to the target function key on the energy storage system comprises:

and if the power failure forbidding key is not triggered, executing power-off operation on a target electric cabinet corresponding to the travel switch in the energy storage system.

10. The method of claim 1, wherein the plurality of function keys further comprises a power down disable key; the method further comprises the following steps:

and under the condition that the power failure forbidding key is triggered, if the cabinet opening operation is detected, forbidding to execute the power failure protection operation.

11. The method of any of claims 1-10, wherein the plurality of function keys further comprises a resume key, the method further comprising:

and under the condition that the recovery key is triggered, conducting a safety control loop corresponding to a target electric cabinet corresponding to the recovery key, and executing power-on operation on the target electric cabinet corresponding to the recovery key in the energy storage system.

12. An energy storage system is characterized by comprising a plurality of electric cabinets connected in parallel, wherein each electric cabinet comprises a safety protection circuit which is provided with a plurality of functional keys and a battery cluster management unit; each function key corresponds to different safety protection functions;

the safety protection circuit is used for acquiring the trigger operation of a target function key in the plurality of function keys, responding to the trigger operation through the battery cluster management unit, and executing the power-off protection operation corresponding to the target function key on the energy storage system.

13. The energy storage system of claim 12, wherein the safety circuit comprises a first relay;

the first relay is used for closing the normally open contact under the condition that the type of the target function key is a single-electric-cabinet power-off key;

and the battery cluster management unit is used for executing power-off operation on a target electric cabinet corresponding to the power-off key of the single electric cabinet in the energy storage system after the first relay closes the normally open contact.

14. The energy storage system of claim 12, further comprising a container master, the safety circuit further comprising a second relay;

the second relay is used for closing the normally open contact under the condition that the type of the target function key is a full-container power-off key;

the battery cluster management unit is used for executing power-off operation on a target electric cabinet corresponding to the full container power-off key in the energy storage system after the second relay closes the normally open contact, and sending a full power-off electric signal to the container main control box;

and the container master control box is used for executing power-off operation on other electric cabinets in the energy storage system.

15. The energy storage system of claim 12, wherein the plurality of function keys includes a power down disable key;

and the battery cluster management unit is also used for executing power-off operation on a target electric cabinet corresponding to the travel switch in the energy storage system under the condition that the type of the target function key is a travel switch and the condition that the power-off forbidding key is not triggered is detected.

16. The energy storage system of claim 12, wherein the plurality of function keys further comprises a restore key, and wherein the safety circuit further comprises a third relay;

17. The energy storage system of claim 16, further comprising a plurality of loop protection relays connected in one-to-one correspondence with the electrical cabinets;

the loop protection relay is used for performing an opening operation in the power-off protection operation process or performing a closing operation in the power-on operation process.