Safety-enhanced energy storage

Abstract

An energy storage device with enhanced safety according to an embodiment of the present invention includes: a control container including a main line, a main switch configured to be connected to the main line, and a main controller configured to control an operation state of the main switch; a battery container including a secondary line configured to be electrically connected to the main line, a battery unit configured to be connected to the secondary line, a sensing unit configured to detect whether a door is opened or closed, and a sub-controller configured to determine an open / closed state of the door based on a sensing signal received from the sensing unit and transmit the determined open / closed state to the main controller.

Description

[Technical field]

[0001] This application claims priority to Korean Patent Application No. 10-2022-0055929 filed on May 6, 2022, the entire contents of which are incorporated herein by reference in their entirety in the specification and drawings of that application.

[0002] The present invention relates to an energy storage system (ESS), and more particularly to an energy storage system with enhanced safety. [Background technology]

[0003] In recent years, as the demand for portable electronic products such as laptops, video cameras, and mobile phones has increased dramatically and the development of electric vehicles, energy storage batteries, robots, satellites, and the like has progressed in earnest, active research has been conducted into high-performance secondary batteries that can be repeatedly charged and discharged.

[0004] Batteries currently in commercial use include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, and lithium batteries. Of these, lithium batteries are attracting attention due to the advantages that they have compared to nickel-based batteries, such as almost no memory effect, which allows them to be charged and discharged freely, as well as an extremely low self-discharge rate and high energy density.

[0005] An energy storage device using such a battery can be a device that stores a large amount of power and provides the stored power to a plurality of load equipment. For example, the energy storage device is used in the form of an energy management system for industrial use, buildings, or homes, and is used as a continuous power grid and / or an emergency power grid by providing the stored power to the load equipment at each usage site.

[0006] Conventionally, a worker (operator) would operate the cutoff switch of the energy storage device to cut off the power, and then perform maintenance work. During such maintenance work, there is a risk that human life may be harmed due to carelessness of the worker or malfunction of the cutoff switch. Therefore, in order to improve the safety of workers, a technology capable of automatically controlling the cutoff switch under maintenance conditions is desired. Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention has been created to solve the above problems, and aims to provide an energy storage device with enhanced safety that can control a cutoff switch for the safety of workers.

[0008] Other objects and advantages of the present invention will become apparent from the following description and the embodiments of the present invention, and can be realized by the means and combinations thereof as claimed in the appended claims. [Means for solving the problem]

[0009] An enhanced safety energy storage device according to one aspect of the present invention may include a control container and a battery container.

[0010] The control container may include a main line, a main switch configured to be connected to the main line, and a main controller configured to control an operational state of the main switch.

[0011] The battery container may include a secondary line configured to be electrically connected to the main line, a battery unit configured to be connected to the secondary line, a sensing unit configured to sense whether a door is opened or closed, and a sub-controller configured to determine an open / closed state of the door based on a sensing signal received from the sensing unit and transmit the determined open / closed state to the main control unit.

[0012] The main control unit may be configured to control the operation state of the main switch to a turn-off state when the door is in an open state, thereby interrupting the connection between the main line and the secondary line.

[0013] The main control unit may be configured to control the operational state of the main switch to a turned-on state to connect the main line and the sub-line when the door is in a closed state.

[0014] The battery container may be configured with multiple doors.

[0015] The sensing unit may be configured to sense whether each of the plurality of doors is opened or closed.

[0016] The master control unit may be configured to control an operational state of the master switch to a turned-off state when at least one of the plurality of doors is in the open state.

[0017] When a plurality of the battery containers are deployed, the secondary lines may be connected in series to each other, so that the main line and the multiple secondary lines form one power line.

[0018] The main control unit may be configured to control an operational state of the main switch to a turned-off state when at least one door of the plurality of battery containers is in an open state.

[0019] The battery container may further include a sub switch connected between the sub line and the battery unit, and configured to have an operating state controlled by the sub control unit.

[0020] The sub-controller may be configured to control an operational state of the sub-switch based on the determined open / closed state.

[0021] The sub-control unit may be configured to control an operational state of the sub-switch to a turn-off state when the door is in an open state, thereby cutting off a connection between the sub-line and the battery unit.

[0022] The sub-control unit may be configured to control an operational state of the sub-switch to a turned-on state to connect the sub-line and the battery unit when the door is in a closed state.

[0023] According to another aspect of the present invention, the energy storage device with enhanced safety may further include a bus bar configured to electrically connect the control container and the battery container by connecting one end to the main line and the other end to the secondary line, respectively.

[0024] According to another aspect of the present invention, the safety-enhanced energy storage device may further include a cable configured to communicatively connect the main control unit and the sub-control unit by having one end and the other end connected to the main control unit and the sub-control unit, respectively. Effect of the Invention

[0025] According to one embodiment of the present invention, the battery container can be shut down depending on whether or not a door included in the battery container is open, which has the advantage of guiding workers to work on the battery container safely.

[0026] The effects of the present invention are not limited to the effects described above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

[0027] The drawings attached to this specification are intended to illustrate preferred embodiments of the present invention and serve to facilitate a further understanding of the technical ideas of the present invention as well as the content of the invention, and therefore the present invention should not be interpreted as being limited to only the matters depicted in the drawings. [Brief description of the drawings]

[0028] [Figure 1] FIG. 1 illustrates a schematic diagram of an energy storage device according to an embodiment of the present invention. [Diagram 2] FIG. 1 is a perspective view of an energy storage device according to one embodiment of the present invention. [Diagram 3] FIG. 2 illustrates a schematic diagram of a control container according to an embodiment of the present invention; [Figure 4] FIG. 2 is a schematic diagram of a battery container according to one embodiment of the present invention. [Diagram 5] FIG. 1 is a schematic diagram illustrating an exemplary configuration of an energy storage device in accordance with an embodiment of the present invention. [Figure 6] 2 is a diagram illustrating an exemplary configuration of a sub-controller and a sensing unit according to an embodiment of the present invention; [Figure 7] 2 is a diagram illustrating an exemplary configuration of a sub-controller and a sensing unit according to an embodiment of the present invention; [Figure 8] FIG. 13 is a schematic diagram illustrating an exemplary configuration of an energy storage device according to another embodiment of the present invention. [Figure 9] FIG. 13 is a schematic diagram illustrating an exemplary configuration of an energy storage device according to yet another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] The terms and words used in this specification and the claims are not to be interpreted limited to their ordinary or dictionary meanings, but are to be interpreted in a meaning and concept corresponding to the technical idea of ​​the present invention in accordance with the principle that the inventor can appropriately define the concept of the term himself / herself in order to explain the invention in the best possible way.

[0030] Therefore, it should be understood that the embodiment described in this specification and the configurations shown in the drawings are merely preferred embodiments of the present invention and do not represent the entire technical idea of ​​the present invention, and therefore there may be various equivalents and modifications that can be substituted therefor at the time of this application.

[0031] Furthermore, in describing the present invention, if it is recognized that a specific description of a known configuration or function related to the present invention may obscure the gist of the present invention, the detailed description will be omitted.

[0032] Phrases including ordinal numbers such as first, second, etc. are used to distinguish one of various components from the other components, and do not limit the components.

[0033] Throughout the specification, when a part is said to "comprise" a certain element, this means that it may further include other elements, not excluding other elements, unless otherwise specified.

[0034] Furthermore, throughout this specification, when a part is said to be "connected" to another part, this includes not only the case where the part is "directly connected" to another part, but also the case where the part is "indirectly connected" via another element between them.

[0035] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0036] Fig. 1 is a schematic diagram of an energy storage device 10 according to an embodiment of the present invention. Fig. 2 is a perspective view of the energy storage device 10 according to an embodiment of the present invention.

[0037] With reference to FIG. 1 , the energy storage device 10 may include a control container 100 and a battery container 200 .

[0038] The control container 100 and the battery container 200 may be electrically and communicatively connected. The control container 100 may be referred to as the E-LINK and the battery container 200 may be referred to as the B-LINK.

[0039] The energy storage device 10 may also further include a water supply container (not shown) that may be controlled by the control container 100 and / or the battery container 200 to supply a fire extinguishing fluid (e.g., water) to the battery container 200 in the event of a fire in the battery container 200.

[0040] Specifically, the control container 100 may be connected to a power conversion system (PCS) to supply power to the internal components of the control container 100 and the battery container 200. The control container 100 may include a monitoring unit (not shown) capable of comprehensively monitoring the energy storage device 10.

[0041] The battery container 200 may include a plurality of battery racks on which battery modules are loaded, a fire suppression unit (e.g., an air conditioning unit, a fire extinguishing unit, and a ventilation unit), etc. The battery container 200 may form a power line and a communication line with the control container 100.

[0042] 2, the energy storage device 10 may include a control container 100 and a battery container 200. The control container 100 and the battery container 200 may be connected to each other by wires, thereby forming a power line and a communication line between the control container 100 and the battery container 200.

[0043] FIG. 3 is a schematic diagram of a control container 100 according to one embodiment of the present invention.

[0044] Referring to FIG. 3, the control container 100 may include a main line 110, a main switch 120, and a main control .

[0045] The main line 110 may be a power line contained in the control container 100. For example, the main line 110 may be a direct current line (DC line).

[0046] The main switch 120 may be configured to be connected to the main line 110. For example, the main switch 120 may be connected in series with the main line 110.

[0047] The master controller 130 may be configured to control the operational state of the master switch 120 .

[0048] Specifically, the main control unit 130 may control the operation state of the main switch 120 to a turned-on state or a turned-off state. For example, when the operation state of the main switch 120 is a turned-on state, the main line 110 may be electrically connected. Conversely, when the operation state of the main switch 120 is a turned-off state, the main line 110 may be electrically disconnected.

[0049] Figure 4 is a schematic diagram of a battery container 200 according to one embodiment of the present invention. Figure 5 is a schematic diagram of an exemplary configuration of an energy storage device 10 according to one embodiment of the present invention.

[0050] Referring to FIG. 4 , the battery container 200 may include a sub-line 210, a battery section 220, a sensing section 230, and a sub-control section 240.

[0051] The secondary line 210 may be configured to be electrically connected to the primary line 110 .

[0052] Specifically, the secondary line 210 may be a power line, similar to the main line 110. For example, the secondary line 210 may be a direct current line, similar to the main line 110. The secondary line 210 may be electrically connected to the main line 110 by electrically connecting the control container 100 and the battery container 200.

[0053] For example, in the embodiment of FIG. 5, the primary line 110 and the secondary line 210 may be electrically connected.

[0054] The battery unit 220 may be configured to be connected to the secondary line 210. Specifically, the battery unit 220 may include a plurality of battery racks BR1 to BRn, and each of the battery racks BR1 to BRn may include a plurality of battery modules.

[0055] For example, the battery unit 220 may include a plurality of battery racks BR1 to BRn. In the embodiment of Fig. 5, the battery unit 220 may include a first battery rack BR1, a second battery rack BR2, and an n-th battery rack BRn, where n is a natural number equal to or greater than 2, and may be determined based on a variety of factors such as the size of the battery container 200 and the allowable capacity of the energy storage device 10.

[0056] The sensing unit 230 may be configured to sense whether a door 260 installed in the battery container 200 is opened or closed.

[0057] Specifically, the sensing unit 230 may sense whether the door 260 disposed in the battery container 200 is opened or closed. For example, the sensing unit 230 may be a magnetic sensor, a piezoelectric sensor, an optical sensor, or the like capable of sensing whether the door 260 is opened or closed.

[0058] For example, the sensing section 230 may include a plurality of sensing units S1 to Sn. In the embodiment of Fig. 5, the sensing section 230 may include a first sensing unit S1, a second sensing unit S2, and an n-th sensing unit Sn.

[0059] Preferably, the battery container 200 may be configured to include a plurality of doors 260. The sensing unit 230 may be configured to sense whether each of the plurality of doors 260 is open or closed. In general, the battery container 200 may include a number of doors 260 corresponding to the battery racks so that a worker can perform work (e.g., maintenance) on each battery rack. That is, a worker may open the door 260 corresponding to the battery rack for work and then perform work on the battery rack. Therefore, in the embodiment of FIG. 5, the battery container 200 may include n doors 260 corresponding to the n battery racks. The sensing unit 230 may include n sensing units S1 to Sn corresponding to the n doors 260.

[0060] The sub-controller 240 may be communicatively connected to the sensing unit 230. The sub-controller 240 may be configured to determine whether the door 260 is open or closed based on a sensing signal received from the sensing unit 230.

[0061] 6 and 7 are diagrams illustrating exemplary configurations of a sub-controller 240 and a sensing unit 230 according to an embodiment of the present invention.

[0062] The sub-controller 240 may be connected to the sensing units S1 to Sn included in the sensing section 230 to form a closed circuit. For example, in the embodiment of FIG. 6, the sub-controller 240 may be connected to the first sensing unit S1, and the first sensing unit S1 may be connected to the second sensing unit S2. The n-th sensing unit Sn may be connected to the sub-controller 240. Therefore, a closed circuit may be formed that connects the sub-controller 240, the first sensing unit S1, the second sensing unit S2, and the n-th sensing unit Sn. However, it should be noted that in the closed circuit of FIG. 6, resistor elements and the like are omitted for ease of explanation.

[0063] For example, the sensing units S1 to Sn may be magnetic sensors. That is, each of the sensing units S1 to Sn may include a first magnetic unit and a second magnetic unit. When the door 260 is opened (open door case), the first magnetic unit and the second magnetic unit are separated, so that the operating state of the sensing unit may be turned off. Conversely, when the door 260 is closed (closed door case), the first magnetic unit and the second magnetic unit are connected, so that the operating state of the sensing unit may be turned on.

[0064] 7, when all of the n doors 260 are closed, the operation states of the n sensing units S1 to Sn may be turned on. In this case, the closed circuit connecting the sub-controller 240 and the sensing unit 230 may be electrically connected. Therefore, the sub-controller 240 may determine the open / closed state of the door 260 provided in the battery container 200 by detecting whether the closed circuit is connected.

[0065] The sub-control unit 240 may be configured to transmit the determined open / closed state to the main control unit 130 .

[0066] Specifically, the sub-controller 240 can transmit open / close state information indicating the open state or the closed state to the main controller 130.

[0067] The main control unit 130 may be configured to control the operation state of the main switch 120 to a turn-off state when the door 260 is in an open state, thereby interrupting the connection between the main line 110 and the secondary line 210. Conversely, the main control unit 130 may be configured to control the operation state of the main switch 120 to a turn-on state when the door 260 is in a closed state, thereby connecting the main line 110 and the secondary line 210.

[0068] Specifically, one end of the main switch 120 may be connected to the secondary line 210 via the main line 110. And the other end of the main switch 120 may be connected to a PCS (not shown) via the main line 110.

[0069] For example, if the operating state of the main switch 120 is controlled to a turn-off state, the connection between the PCS and the control container 100 and the battery container 200 may be interrupted. Therefore, the electrical connection between the main line 110 and the secondary line 210 may be interrupted.

[0070] In another example, when the operating state of the main switch 120 is controlled to be turned on, the PCS may be electrically connected to the control container 100 and the battery container 200. Thus, the main line 110 and the secondary line 210 may be electrically connected to each other.

[0071] In particular, the master control unit 130 may be configured to control the operational state of the master switch 120 to a turned-off state when at least one of the plurality of doors 260 is in an open state.

[0072] Specifically, when at least one of the multiple doors 260 arranged in the battery container 200 is opened, the sub-controller 240 may transmit opening / closing state information indicating the open state to the main controller 130. The main controller 130 that has received the opening / closing state information indicating the open state may control the operation state of the main switch 120 to a turned-off state, thereby cutting off the connection between the main line 110 and the sub-line 210. Therefore, when all the doors 260 arranged in the battery container 200 are closed, the operation state of the main switch 120 is controlled to a turned-on state, and the main line 110 and the sub-line 210 may be electrically connected.

[0073] The energy storage device 10 according to an embodiment of the present invention may cut off power to the battery container 200 depending on whether the door 260 provided in the battery container 200 is opened or closed. That is, even if an operator does not control the operation state of the main switch 120 to the turn-off state by himself, the power to the battery container 200 may be cut off as soon as the door 260 is opened. Therefore, the battery container 200 is in an electrically safe state, so that the safety of the operator may be enhanced. This has an advantage in that it is possible to prevent fatal accidents due to operator negligence.

[0074] FIG. 8 is a schematic diagram illustrating an exemplary configuration of an energy storage device 10 in accordance with another embodiment of the present invention.

[0075] 1 and 8, the battery container 200 may further include a secondary switch 250.

[0076] The secondary switch 250 may be configured to be connected between the secondary line 210 and the battery section 220 .

[0077] Specifically, the secondary switch 250 may have one end connected to the secondary line 210 and the other end connected to the battery unit 220. The line connected to the other end of the secondary switch 250 may be connected to each of the multiple battery racks BR1-BRn included in the battery unit 220. In other words, the secondary switch 250 may be connected to a common line that connects the secondary line 210 and the multiple battery racks BR1-BRn.

[0078] 8, the secondary switch 250 may be connected between the secondary line 210 and the battery unit 220. Depending on the operating state of the secondary switch 250, the secondary line 210 and the battery unit 220 may be electrically connected or disconnected.

[0079] The secondary switch 250 can be configured such that its operating state is controlled by the secondary control unit 240 .

[0080] Specifically, the sub-controller 240 may be configured to control the operation state of the sub switch 250 based on the determined open / closed state. For example, the sub-controller 240 may control the operation state of the sub switch 250 to a turned-on state or a turned-off state based on the determined open / closed state.

[0081] For example, the sub-controller 240 may be configured to control the operation state of the sub switch 250 to a turn-off state when the door 260 is in an open state, thereby cutting off the connection between the sub line 210 and the battery unit 220. Conversely, the sub-controller 240 may be configured to control the operation state of the sub switch 250 to a turn-on state when the door 260 is in a closed state, thereby connecting the sub line 210 and the battery unit 220.

[0082] That is, the sub-control unit 240 determines whether the door 260 installed in the battery container 200 is open or closed through the sensing unit 230, and can cut off the electrical connection between the sub-line 210 and the battery unit 220 when the door 260 is in a closed state.

[0083] The energy storage device 10 according to one embodiment of the present invention can enhance safety for operators by controlling the main switch 120 included in the control container 100 and / or the secondary switch 250 included in the battery container 200 to a turned-off state when the door 260 of the battery container 200 is opened.

[0084] In particular, even if the operating state of the main switch 120 is not controlled to the turned-off state due to carelessness or a malfunction of the operator, the operating state of the sub switch 250 is controlled to the turned-off state, thereby further enhancing safety for the operator.

[0085] With further reference to FIG. 1 , the energy storage device 10 may further include a bus bar 300 and a cable 400 .

[0086] The bus bar 300 may be configured to electrically connect the control container 100 and the battery container 200 by having one end and the other end connected to the main line 110 and the secondary line 210, respectively.

[0087] 2, 5 and 8, the bus bar 300 may be connected between the control container 100 and the battery container 200. In particular, one end of the bus bar 300 may be connected to the main line 110 of the control container 100, and the other end of the bus bar 300 may be connected to the secondary line 210 of the battery container 200. Thus, a power line including the main line 110, the bus bar 300 and the secondary line 210 may be formed.

[0088] The cable 400 can be configured to communicatively connect the main control unit 130 and the sub-control unit 240 by connecting one end to the main control unit 130 and the other end to the main control unit 130 and the sub-control unit 240, respectively.

[0089] 2, 5 and 8, the cable 400 may be connected between the control container 100 and the battery container 200. In particular, one end of the cable 400 may be connected to the main control unit 130 of the control container 100, and the other end of the cable 400 may be connected to the sub-control unit 240 of the battery container 200. Thus, a communication line including the main control unit 130, the cable 400, and the sub-control unit 240 may be formed.

[0090] FIG. 9 is a diagram illustrating a schematic configuration of an energy storage device 10 in accordance with yet another embodiment of the present invention.

[0091] A plurality of battery containers 200 may be deployed. Specifically, when a plurality of battery containers 200 are deployed, the secondary lines 210 may be connected in series to each other, so that the main line 110 and the multiple secondary lines 210 form one power line.

[0092] In the embodiment of Fig. 9, the energy storage device 10 may include a first battery container 201, a second battery container 202, and a third battery container 203. The control container 100 and the multiple battery containers 200 may be electrically connected via a bus bar 300. For example, the main line 110 of the control container 100 and the secondary lines 210 of the first to third battery containers 201, 202, and 203 may form one power line.

[0093] In the embodiment of FIG. 9, the control container 100 and the battery containers 200 may be communicatively connected via a cable 400. Preferably, a communication line between the control container 100 and the battery containers 200 may be formed according to a home-run method and a daisy chain method. For example, according to the home-run method, the control container 100 may be communicatively connected to the first to third battery containers 201, 202, and 203, respectively. Then, according to the daisy chain method, the control container 100 may be connected to the first battery container 201, the first battery container 201 may be connected to the second battery container 202, and the second battery container 202 may be connected to the third battery container 203.

[0094] 9, the energy storage device 10 includes three battery containers 200, but the battery containers 200 may be further connected via the bus bars 300 and the cables 400. That is, the structure of the battery containers 200 is an expandable modular structure. Therefore, the number of battery containers 200 included in the energy storage device 10 can be easily expanded via the connecting members (e.g., the bus bars and the cables).

[0095] For example, the main control unit 130 may be configured to control the operation state of the main switch 120 to a turn-off state when at least one door 260 of the multiple battery containers 200 is in an open state. In the embodiment of FIG. 9, when at least one of all the doors 260 included in the first to third battery containers 201, 202, 203 is opened, the main control unit 130 may control the operation state of the main switch 120 to a turn-off state. In this case, the power line formed by the control container 100 and the first to third battery containers 201, 202, 203 may be disconnected, and the first to third battery containers 201, 202, 203 may be in a shutdown state. Therefore, an operator can safely perform work on the battery container 200.

[0096] As another example, when at least one door 260 of the plurality of battery containers 200 is in an open state, the operation state of the main switch 120 is not controlled by the main control unit 130, and the operation state of the secondary switch 250 in each of the plurality of battery containers 200 may be controlled by the secondary control unit 240. The secondary control unit 240 may be configured to control the operation state of the corresponding secondary switch 250 to a turned-off state when the door 260 is in an open state. In the embodiment of FIG. 9, it is assumed that the doors 260 included in the first battery container 201 and the third battery container 203 are both in a closed state, and at least one of the doors 260 included in the second battery container 202 is in an open state. The secondary control unit 240 included in the second battery container 202 may control the operation state of the corresponding secondary switch 250 to a turned-off state. In this case, the electrical connection between the control container 100 and the first battery container 201 and the third battery container 203 is maintained, and only the second battery container 202 may be in a shutdown state. Therefore, workers can safely perform work on the second battery container 202 without having to shut down all of the multiple battery containers 200.

[0097] As yet another example, when at least one door 260 of the multiple battery containers 200 is in an open state, the main control unit 130 may control the operation state of the main switch 120 to a turned-off state. Then, the sub-control unit 240 included in the battery container 200 whose door 260 is open may control the operation state of the corresponding sub switch 250 to a turned-off state. As in the above-described embodiment, in the embodiment of FIG. 9, it is assumed that the doors 260 included in the first battery container 201 and the third battery container 203 are both in a closed state, and at least one of the doors 260 included in the second battery container 202 is in an open state. Since at least one door 260 of the doors 260 included in the multiple battery containers 200 is opened, the main control unit 130 may control the operation state of the main switch 120 to a turned-off state. Also, the sub-control unit 240 included in the second battery container 202 may control the operation state of the corresponding sub switch 250 to a turned-off state. That is, by controlling both the main switch 120 and the sub switch 250 to be in the turned-off state, it is possible to completely cut off the power to the second battery container 202. Therefore, it is possible to further enhance the safety of the operator.

[0098] Meanwhile, the main control unit 130 and the sub-control unit 240 may selectively include a processor, application specific integrated circuits (ASIC), other chipsets, logic circuits, registers, communication modems, data processing devices, etc., known in the art, in order to activate various control logics performed in the present invention. Also, when the control logic is realized by software, the main control unit 130 and the sub-control unit 240 may be realized by a collection of program modules. In this case, the program modules may be stored in a memory (not shown) and activated by the main control unit 130 and / or the sub-control unit 240. Here, the memory is not particularly limited in type as long as it is a known information storage means known to be capable of recording, erasing, updating, and reading data. As an example, the information storage means may include a random access memory (RAM), a flash memory, a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a register, etc.

[0099] Although the present invention has been described above using limited embodiments and drawings, the present invention is not limited thereto, and it goes without saying that various modifications and variations can be made by a person having ordinary knowledge in the technical field to which the present invention pertains within the equivalent scope of the technical concept of the present invention and the scope of the claims.

[0100] Furthermore, the present invention described above may be variously replaced, modified, and altered by a person having ordinary knowledge in the technical field to which the present invention pertains, without departing from the technical spirit of the present invention. Therefore, the present invention is not limited to the above-described embodiments and the accompanying drawings, but may be configured by selectively combining all or part of each embodiment for various modifications. [Explanation of symbols]

[0101] 10 Energy storage device 100 Control Container 110 Main Line 120 Main Switch 130 Control section 200 Battery Container 210 Secondary Line 220 Battery section 230 Sensing section 240 Sub-control section 250 Secondary Switch 260 Door 300 Busbar 400 Cable

Claims

1. a control container including a main line, a main switch configured to be connected to the main line, and a main controller configured to control an operational state of the main switch; a battery container including: a secondary line configured to be electrically connected to the main line; a battery unit configured to be connected to the secondary line; a sensing unit configured to sense whether a door is opened or closed; and a secondary control unit configured to determine an open / closed state of the door based on a sensing signal received from the sensing unit and transmit the determined open / closed state to the main control unit; 23. A safety enhanced energy storage device, comprising:

2. The main control unit is When the door is open, the operation state of the main switch is controlled to a turn-off state to cut off the connection between the main line and the sub-line; 2. The safety-enhanced energy storage device of claim 1, configured to control an operational state of the main switch to a turned-on state to connect the main line and the secondary line when the door is in a closed state.

3. The battery container comprises: It is configured with multiple doors, The sensing unit is The enhanced security energy storage device of claim 2 , configured to sense whether each of the plurality of doors is open or closed.

4. The main control unit is 4. The safety-enhanced energy storage device of claim 3, configured to control an operational state of the master switch to a turned off state when at least one of the plurality of doors is in the open state.

5. The battery container comprises: When a plurality of the sub-lines are provided, the sub-lines are connected in series to each other, so that the main line and the plurality of sub-lines form one power line, The main control unit is 3. The safety-enhanced energy storage device of claim 2, configured to control an operational state of the master switch to a turned off state when a door of at least one of the plurality of battery containers is in an open state.

6. The battery container comprises: The safety-enhanced energy storage device of claim 1 , further comprising a secondary switch connected between the secondary line and the battery section and configured to have an operating state controlled by the secondary control section.

7. The sub-control unit is The enhanced safety energy storage device of claim 6 configured to control an operational state of the secondary switch based on the determined open or closed state.

8. The sub-control unit is When the door is open, the operation state of the secondary switch is controlled to a turn-off state to cut off the connection between the secondary line and the battery unit; 8. The energy storage device with enhanced safety according to claim 7, wherein the secondary switch is controlled to be in a turned-on state to connect the secondary line and the battery unit when the door is in a closed state.

9. 2. The safety-enhanced energy storage device of claim 1, further comprising a bus bar configured to electrically connect the control container and the battery container by connecting one end to the main line and the other end to the secondary line, respectively.

10. 2. The safety-enhanced energy storage device of claim 1, further comprising a cable configured to communicatively connect the main control unit and the sub-control unit by connecting one end to the main control unit and the other end to the sub-control unit, respectively.

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