Secondary battery and energy storage device

Abstract

The present invention relates to: a secondary battery, which is charged and discharged as metal ions dissolved in an electrolyte are oxidized and reduced; and an energy storage device. The secondary battery according to an embodiment of the present invention comprises: a plurality of monoblocks in which a plurality of layers are stacked in the height direction, wherein oxidation-reduction reactions occur in each of the layers; a rack frame in which the plurality of monoblocks are accommodated; a plurality of rack shelves which divide the rack frame in the height direction and on which the plurality of monoblocks are seated; a plurality of front panels disposed in the height direction on the front surface of the rack frame; and a plurality of battery management systems that are respectively disposed on the plurality of front panels and control the plurality of monoblocks.

Description

Secondary batteries and energy storage devices

[0001] The present invention relates to a secondary battery and an energy storage device, and more particularly, to a secondary battery and an energy storage device in which metal ions dissolved in an electrolyte are oxidized and reduced to be charged and discharged.

[0002] A redox flow battery (RFB) is an electrochemical storage device that stores electrical energy as the chemical energy of the electrolyte by charging and discharging the active material within the electrolyte through oxidation and reduction, unlike conventional secondary batteries. The actual electrochemical reaction of a redox flow battery occurs in the stack, and it operates by continuously circulating the electrolyte stored in the tank within the stack using a fluid pump. While these redox flow batteries have the advantages of long life, high output, and high capacity, they have suffered from space constraints and design difficulties due to the tank that stores the electrolyte and the fluid pump that circulates the electrolyte. Therefore, the inventors of the present invention developed a redox secondary battery that eliminates the electrolyte tank and fluid pump, but it suffered from the problem of low energy density and large volume.

[0003] The problem that the present invention seeks to solve is a secondary battery that minimizes volume by increasing integration.

[0004] Another object of the present invention is to provide an energy storage device that is easy to maintain while increasing integration.

[0005] The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the description below.

[0006] In order to achieve the above task, a secondary battery according to an embodiment of the present invention includes a plurality of monoblocks in which a plurality of layers in which an oxidation reaction occurs are stacked in the height direction, a rack frame in which the plurality of monoblocks are accommodated, a plurality of rack shelves that divide the rack frame in the height direction and on which the plurality of monoblocks are mounted, a plurality of front panels arranged in the height direction on the front of the rack frame, and a plurality of battery management systems arranged on each of the plurality of front panels to control the plurality of monoblocks.

[0007] In order to achieve the above task, an energy storage system according to an embodiment of the present invention includes a plurality of monoblocks in which a plurality of layers in which an oxidation reaction occurs are stacked in the height direction, a plurality of racks in which the plurality of monoblocks are each accommodated, and an enclosure in which the plurality of racks are accommodated by being arranged in the width direction.

[0008] Specific details of other embodiments are included in the detailed description and drawings.

[0009] According to the secondary battery and energy storage device of the present invention, one or more of the following effects are present.

[0010] First, there is the advantage of high energy density due to increased integration without wasted space.

[0011] Second, there is also the advantage of not causing leakage of the liquid electrode due to breakage of the monoblock.

[0012] Third, the rack and monoblock can be easily removed, making maintenance easier.

[0013] Fourth, it has the advantage of high energy density and efficient cooling of the monoblock.

[0014] Fifth, it also has the advantage of minimizing leakage current by insulating between the rack and the enclosure.

[0015] Sixth, the battery management system is efficiently deployed, which also has the advantage of being easy to cool and maintain.

[0016] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

[0017] FIG. 1 is a perspective view of a monoblock according to one embodiment of the present invention.

[0018] Figure 2 is a perspective view of a secondary battery according to one embodiment of the present invention.

[0019] Figure 3 is a perspective view of a rack of a secondary battery according to one embodiment of the present invention.

[0020] Figure 4 is an exploded perspective view of a rack of a secondary battery according to one embodiment of the present invention.

[0021] Figure 5 is a perspective view of a portion of a secondary battery according to one embodiment of the present invention.

[0022] Figure 6 is an exploded perspective view of the front panel of a secondary battery according to one embodiment of the present invention.

[0023] FIGS. 7 and 8 are perspective views of an energy storage device according to one embodiment of the present invention.

[0024] FIG. 9 is a partial front view of an energy storage device according to one embodiment of the present invention.

[0025] FIG. 10 is an exploded perspective view of an enclosure of an energy storage device according to one embodiment of the present invention.

[0026] FIG. 11 is a perspective view of an enclosure slider of an energy storage device according to one embodiment of the present invention.

[0027] FIG. 12 is a front view of an enclosure slider of an energy storage device according to one embodiment of the present invention.

[0028] FIG. 13 is an exploded perspective view of an enclosure slider of an energy storage device according to one embodiment of the present invention.

[0029] FIG. 14 is a partial front view of an energy storage device according to one embodiment of the present invention.

[0030] FIG. 15 is a diagram showing air flow in an energy storage device according to one embodiment of the present invention.

[0031] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. These embodiments are provided only to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Like reference numerals designate like elements throughout the specification.

[0032] Although terms like "first" and "second" are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another, and unless otherwise specified, a "first" component may also be a "second" component.

[0033] Throughout the specification, unless otherwise specifically stated, each element may be singular or plural.

[0034] Hereinafter, the phrase "any configuration is placed on (or below)" a component or "on (or below)" a component may mean that any configuration is placed in contact with the upper surface (or lower surface) of said component, and that other configurations may be interposed between said component and any configuration placed on (or below) said component.

[0035] Additionally, when it is described that a component is "connected," "coupled," or "connected" to another component, it should be understood that the components may be directly connected or connected to one another, but that other components may also be "interposed" between the components, or that each component may be "connected," "coupled," or "connected" through another component.

[0036] As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "consisting of" or "comprising" should not necessarily be construed to include all of the components or steps described in the specification, and should be construed to mean that some of the components or steps may not be included, or that additional components or steps may be included.

[0037] Throughout the specification, when we refer to "A and / or B", this means A, B, or A and B, unless otherwise stated, and when we refer to "C to D", this means C or more and D or less, unless otherwise stated.

[0038] Hereinafter, the present invention will be described with reference to drawings for explaining a secondary battery and an energy storage system according to embodiments of the present invention.

[0039] FIG. 1 is a perspective view of a monoblock according to one embodiment of the present invention.

[0040] A monoblock (10) according to one embodiment of the present invention includes a plurality of layers (11) stacked in the height direction (up-down direction), a pair of end plates (13) arranged at the top and bottom of the plurality of layers (11), and a bus bar (15) electrically connecting the plurality of layers (11).

[0041] A redox reaction occurs in the layer (11). The layer (11) is divided into two reaction spaces by a separation membrane (not shown). The two reaction spaces are arranged in the height direction (the stacking direction of multiple layers (11)). One of the two reaction spaces of the layer (11) is arranged above and the other is arranged below.

[0042] In the first reaction space of the layer (11), a first redox pair causing a first half-reaction is dissolved, and the first redox pair includes at least one of vanadium (V), zinc (Zn), bromine (Br), chromium (Cr), manganese (Mn), titanium (Ti), iron (Fe), cerium (Ce), and cobalt (Co), and in this embodiment, it is vanadium (V). The first half-reaction is as follows, and → represents the discharge reaction direction and ← represents the charge reaction direction.

[0043] V 2+ ←→ V 3+ + e -

[0044] During discharge, vanadium 2 ions are oxidized to vanadium 3 ions, and during charge, vanadium 3 ions are reduced to vanadium 2 ions.

[0045] In the second reaction space of the layer (11), a second redox pair causing a second half-reaction is dissolved, and the second redox pair includes at least one of vanadium (V), zinc (Zn), bromine (Br), chromium (Cr), manganese (Mn), titanium (Ti), iron (Fe), cerium (Ce), and cobalt (Co), and in this embodiment, vanadium (V). The second half-reaction is as follows, and → indicates the discharge reaction direction and ← indicates the charge reaction direction.

[0046] V 5+ + e - ←→ V 4+

[0047] During discharge, vanadium pentavalent ions are reduced to vanadium tetravalent ions, and during charge, vanadium tetravalent ions are oxidized to vanadium pentavalent ions.

[0048] Layer (11) is a low-height plate-shaped structure. Layer (11) is formed as a hexahedron and is arranged so that the widest surface faces the floor (ground). Layer (11) is arranged so that the shortest edge is in the height direction.

[0049] A plurality of layers (11) are stacked in the height direction of each layer (11). The plurality of layers (11) are stacked so that their widest surfaces are in contact with each other. The plurality of layers (11) stacked in the height direction have a tall square pillar shape.

[0050] A plurality of layers (11) are electrically connected by a bus bar (15). The layer (11) includes a current collector (11c) that is electrically connected to the bus bar (15) and through which electrons move so that current flows during charging and discharging.

[0051] A pair of end plates (13) are arranged at the top and bottom of the plurality of layers (11). The end plates (13) are made of a relatively strong insulating material or an insulated metal material.

[0052] The bus bar (15) transmits electricity generated in multiple layers (11) to the outside during discharge and transmits external electricity to the multiple layers (11) during charging. The bus bar (15) connects multiple layers (11) in parallel or series. The bus bar (15) is formed in a plate shape and is arranged to cover one side surface of the multiple layers (11). The bus bar (15) may be shaped to extend in the height direction so as to cover at least a portion of the side surfaces of a pair of end plates (13).

[0053] The busbars (15) are provided in pairs, one of which serves as an anode and the other as a cathode. The pair of busbars (15) are arranged on two opposite side surfaces of the plurality of layers (11). Depending on the embodiment, the pair of busbars (15) may be arranged side by side on one side surface.

[0054] FIG. 2 is a perspective view of a secondary battery according to one embodiment of the present invention, FIG. 3 is a perspective view of a rack of a secondary battery according to one embodiment of the present invention, FIG. 4 is an exploded perspective view of a rack of a secondary battery according to one embodiment of the present invention, FIG. 5 is a perspective view of a part of a secondary battery according to one embodiment of the present invention, and FIG. 6 is an exploded perspective view of a front panel of a secondary battery according to one embodiment of the present invention.

[0055] A secondary battery according to one embodiment of the present invention comprises a plurality of monoblocks (10) in which a plurality of layers (11) in which an oxidation reaction occurs are stacked in the height (H) direction, a rack (110) in which the plurality of monoblocks (10) are accommodated, and a plurality of battery management systems (141) each disposed in front of the rack (110) to control the plurality of monoblocks (10).

[0056] Hereinafter, the height (H) direction means the up-down direction, the length (L) direction means the front-back direction, and the width (W) direction means the left-right direction.

[0057] The rack (110) accommodates a plurality of monoblocks (10) arranged in the height (H) direction, the length (L) direction, and the width (W) direction. The rack (110) has a roughly rectangular shape with a high height (H), a long length (L), and a narrow width (W).

[0058] The rack (110) is opened in the width (W) direction, and each of the plurality of bus bars (15) of the plurality of monoblocks (10) accommodated in the rack (110) is arranged so that its surface does not face the opened direction of the rack (110). That is, each of the plurality of plate-shaped bus bars (15) is arranged so that its surface faces the length (L) direction of the rack (110).

[0059] A plurality of monoblocks (10) accommodated in a rack (110) are arranged spaced apart in the width (W) and height (H) directions, but are arranged densely in the length (L) direction. That is, the plurality of monoblocks (10) are arranged so that the bus bars (15) of two monoblocks (10) adjacent in the length (L) direction are in mutual contact.

[0060] In this embodiment, it is preferable that the number of monoblocks (10) accommodated in one rack (110) in the length (L) direction is greater than the number in the height (H) direction, and that the number in the height (H) direction is greater than the number in the width (W) direction.

[0061] A rack (110) according to one embodiment of the present invention comprises: a rack frame (111) in which a plurality of monoblocks (10) are accommodated; a plurality of rack shelves (112) that divide the rack frame (111) in the height (H) direction and on which the plurality of monoblocks (10) are mounted; a plurality of front panels (118) arranged in the height direction on the front of the rack frame (111); a plurality of rear panels (119) arranged in the height direction on the rear of the rack frame (111); a plurality of side supporters (117) each arranged on one side of the plurality of rack shelves (112) to support one side of the plurality of monoblocks (10); a plurality of wire clips (116) arranged on one side of the plurality of rack shelves (112) to support a wire (145) through which an electrical signal is transmitted; a plurality of rack posts (114) that are formed to be long in the height (H) direction so as to be connected to the plurality of rack shelves (112) and arranged to protrude in the width (W) direction from the rack frame (111); It includes a plurality of rack casters (115) each coupled to the lower portion of a plurality of rack posts (114), and a rack rail (113) arranged on the upper portion of a rack frame (111) and formed long in the length (L) direction.

[0062] The rack frame (111) is formed as a rectangular parallelepiped with no faces and only edges. The rack frame (111) is formed as a rectangular parallelepiped with a high height (H), a long length (L), and a narrow width (W). The rack frame (111) is divided in the height (H) direction by a plurality of rack shelves (112).

[0063] The rack frame (111) has a plurality of front panels (118) arranged on the front and a plurality of rear panels (119) arranged on the rear, but both sides (left and right sides) in the width (W) direction (left and right directions) are opened so that a plurality of monoblocks (10) are pulled out in the width (W) direction.

[0064] A plurality of monoblocks (10) are arranged in the length (L) direction on each of the plurality of rack shelves (112). On one rack shelf (112), a plurality of monoblocks (10) arranged in the length (L) direction are arranged in two rows spaced apart in the width (W) direction. A partition plate (not shown) may be arranged in the middle of the width (W) direction of the plurality of monoblocks (10) arranged on one rack shelf (112) to partition the two rows of the plurality of monoblocks (10) in the width (W) direction (left and right direction).

[0065] A plurality of rack shelves (112) are arranged spaced apart in the height (H) direction. A plurality of monoblocks (10) are stacked spaced apart in the height (H) direction by the plurality of rack shelves (112). The end plates (13) of two monoblocks (10) stacked in the height (H) "W amount are in contact with the rack shelves (112).

[0066] Referring to Fig. 5, a side supporter (117) is arranged on the width (W) direction (left-right direction) side of the rack shelf (112) to protrude upward and / or downward from the rack shelf (112) and support the side of the monoblock (10). The side supporter (117) is detachably coupled to the rack shelf (112) so that the monoblock (10) can be withdrawn.

[0067] Referring to FIG. 5, a wire clip (116) is arranged on the width (W) direction (left-right direction) side of the rack shelf (112). The wire clip (116) can support various types of wires (145), and in the present embodiment, supports a wire (145) that transmits an electrical signal sensed by the voltage of any one of the plurality of monoblocks (10) and is connected to a battery management system (141). According to an embodiment, the wire clip (116) can support a wire that transmits an electrical signal (temperature value) sensed by a temperature sensor (thermistor) attached to any one of the plurality of monoblocks (10). The wire clip (116) is detachably coupled to the rack shelf (112).

[0068] A plurality of front panels (118) are arranged one by one on each layer partitioned by a plurality of rack shelves (112). A plurality of front panels (118) are arranged one by one on each layer of a plurality of monoblocks (10).

[0069] Referring to FIG. 6, the front panel (118) includes a front panel base (1181) formed in a plate shape and coupled to the rack frame (111), and a front panel cover (1183) coupled to the front panel base (1181). The front panel base (1181) and the front panel cover (1183) form a space therebetween, so that the battery management system (141) is placed between the front panel base (1181) and the front panel cover (1183). The front panel cover (1183) has a front panel hole (1183a) formed on the side thereof, into which a connector (143) is inserted. Referring to FIG. 5, the connector (143) is connected to the battery management system (141) by a wire (145) through which an electrical signal sensing the voltage of any one of the plurality of monoblocks (10) is transmitted, and is connected to the battery management system (141) by penetrating the front panel hole (1183a).

[0070] A plurality of rack posts (114) are connected to a rack frame (111) and a plurality of rack shelves (112) to enhance the structural rigidity of the rack (110). A plurality of rack casters (115) are respectively connected to the bottom of each of the plurality of rack posts (114). The secondary battery can be moved by the plurality of rack casters (115).

[0071] The battery management system (141) balances the voltage of multiple monoblocks (10) (or multiple layers (11)). The battery management system (141) is positioned at the front of multiple racks (110). The battery management system (141) is accommodated in the front panel (118) of the rack (110).

[0072] FIG. 7 and FIG. 8 are perspective views of an energy storage device according to one embodiment of the present invention, FIG. 9 is a partial front view of an energy storage device according to one embodiment of the present invention, and FIG. 10 is an exploded perspective view of an enclosure of an energy storage device according to one embodiment of the present invention.

[0073] An energy storage device according to one embodiment of the present invention includes a plurality of monoblocks (10), a plurality of racks (110) in which the plurality of monoblocks (10) are accommodated, an enclosure (120) in which the plurality of racks (110) are accommodated while being arranged in a width (W) direction, and an electrical box (130) in which an electrical device for controlling the plurality of monoblocks (10) is accommodated and which is arranged on the upper side of the enclosure (120).

[0074] The enclosure (120) is a rectangular box-shaped object with an open front. A door for opening and closing the open front may be provided on the front of the enclosure (120). The enclosure (120) has an open front, and any one of a plurality of racks (110) can be extended in the longitudinal direction (L).

[0075] A plurality of racks (110) are arranged in the width (W) direction in the enclosure (120). The plurality of racks (110) are slid out from the enclosure (120) in the length (L) direction.

[0076] An electrical box (130) is provided on the upper side of the enclosure (120). The electrical box (130) is arranged to be spaced apart from the upper surface of the enclosure (120). The electrical box (130) is provided with various devices required for an energy storage system, such as a power conditioning system (PCS), switch gear, switching mode power supply (SMPS), energy management system (EMS), fan controller, heating, ventilation, and air conditioning (HVAC), and fire extinguishing device. In the present embodiment, two electrical boxes (130) are provided, a switch gear box (131) provided with a switch gear, and a power supply box (132) provided with a switching mode power supply.

[0077] Referring to FIG. 10, an enclosure (120) according to an embodiment of the present invention comprises an enclosure body (121) having an open front and a plurality of inlet holes (121a) and a plurality of discharge holes (121b) formed on the upper surface, an electric box supporter (129) disposed on the upper surface of the enclosure body (121) to support an electric box (130) away from the enclosure body (121), a plurality of suction fans (127) disposed in the plurality of inlet holes (121a) to allow external air to flow into the interior of the enclosure (120), a plurality of internal fans (128) disposed inside the enclosure body (121) to allow air to flow from the front to the rear, a plurality of enclosure sliders (123) slidably coupled to a plurality of racks (110), a plurality of caster guides (125) guiding the plurality of racks (110) to be drawn out in the length (L) direction, and a plurality of racks (110). It includes a front caster stopper (124) and a rear caster stopper (126) that limit movement in the length (L) direction.

[0078] The enclosure body (121) has a rectangular box shape with an open front. Inside the enclosure body (121), a plurality of racks (110) are arranged and accommodated in the width (W) direction. A plurality of enclosure sliders (123) are provided on the upper side inside the enclosure body (121), and a plurality of caster guides (125), a front caster stopper (124), and a rear caster stopper (126) are provided on the lower side inside the enclosure body (121). A plurality of internal fans (128) are provided on the front side inside the enclosure body (121).

[0079] The enclosure body (121) is formed with a plurality of inlet holes (121a) formed at the front of the upper surface through which external air is introduced. Some of the plurality of inlet holes (121a) are arranged between two adjacent racks (110) among the plurality of racks (110). Others of the plurality of inlet holes (121a) are arranged between the racks (110) and the side surfaces of the enclosure body (121). A plurality of suction fans (127) are arranged in each of the plurality of inlet holes (121a). The electrical box (130) is arranged spaced apart from at least some of the plurality of inlet holes (121a).

[0080] The enclosure body (121) has a plurality of discharge holes (121b) formed at the rear of the upper surface through which air inside the enclosure body (121) is discharged to the outside. Some of the plurality of discharge holes (121b) are arranged between two adjacent racks (110) among the plurality of racks (110). Others of the plurality of discharge holes (121b) are arranged between the racks (110) and the side surfaces of the enclosure body (121).

[0081] A plurality of suction fans (127) are arranged in a plurality of inlet holes (121a). The plurality of suction fans (127) are arranged at the front of the upper surface of the enclosure body (121) to cause external air to flow into the interior of the enclosure body (121). Some of the plurality of suction fans (127) are arranged between two adjacent racks (110) among the plurality of racks (110), and other some are arranged between the racks (110) and the side of the enclosure body (121). The electrical box (130) is arranged spaced apart from at least some of the plurality of suction fans (127).

[0082] Each of the plurality of caster guides (125) is formed to be long in the length (L) direction. The plurality of caster guides (125) are arranged spaced apart in the width (W) direction on the lower side inside the enclosure body (121). Two adjacent caster guides (125) contact the plurality of rack casters (115) of the rack (110) to guide the rack casters (115) so that they can roll in the length (L) direction.

[0083] A front caster stopper (124) is detachably coupled in front of a plurality of caster guides (125). The front caster stopper (124) is formed to be long in the width (W) direction. The front caster stopper (124) contacts a plurality of rack casters (115) arranged at the front end among a plurality of rack casters (115) of a plurality of racks (110) to prevent the racks (110) from moving forward, and is detached when the racks (110) are pulled out.

[0084] A rear caster stopper (126) is coupled to the rear of the plurality of caster guides (125). The rear caster stopper (126) is formed to be long in the width (W) direction. The rear caster stopper (126) contacts the plurality of rack casters (115) arranged at the rear end among the plurality of rack casters (115) of the plurality of racks (110) to prevent the racks (110) from moving backward.

[0085] Each of the plurality of enclosure sliders (123) is formed to be long in the length (L) direction. The plurality of enclosure sliders (123) are arranged on the upper side inside the enclosure body (121) to be spaced apart in the width (W) direction. Each of the plurality of enclosure sliders (123) is slidably coupled to each of the plurality of racks (110) so that each of the plurality of racks (110) can be pulled out in the length (L) direction. Each of the plurality of enclosure sliders (123) is configured in a double sliding manner so that each of the plurality of racks (110) can be completely pulled out from the enclosure body (121). By the double sliding manner of the enclosure sliders (123), all of the plurality of monoblocks (10) accommodated in the racks (110) can be pulled out in the width (W) direction.

[0086] FIG. 11 is a perspective view of an enclosure slider of an energy storage device according to one embodiment of the present invention, FIG. 12 is a front view of an enclosure slider of an energy storage device according to one embodiment of the present invention, and FIG. 13 is an exploded perspective view of an enclosure slider of an energy storage device according to one embodiment of the present invention.

[0087] According to one embodiment of the present invention, an enclosure slider (123) includes an enclosure rail (1231) that is slidably coupled with a rack rail (113), an enclosure guide (1233) that is coupled to an enclosure body (121) and slidably coupled with the enclosure rail (1231), and a rail insulation portion (1235) made of a non-conductive material provided between the enclosure rail (1231) and the rack rail (113).

[0088] The enclosure guide (1233) is coupled to the upper side inside the enclosure body (121). The enclosure guide (1233) is slidably coupled with the enclosure rail (1231). The enclosure rail (1231) is slidably coupled with the enclosure guide (1233) and slidably coupled with the rack rail (113) so that the rack (110) can be pulled out in a double sliding manner.

[0089] The rail insulation (1235) prevents the rack rail (113) and the enclosure rail (1231) from directly contacting each other. The rail insulation (1235) is formed of a non-conductive material and insulates the rack rail (113) and the enclosure rail (1231). Accordingly, the enclosure (120) and the plurality of racks (110) are insulated.

[0090] Referring to FIG. 13, the enclosure rail (1231) includes a pair of enclosure rail bars (12311) formed to be long in the longitudinal (L) direction (front-rear direction), a rack rail guide (12312) arranged between the pair of enclosure rail bars (12311), a front rail stopper (12313), and a rear rail stopper (12314).

[0091] A pair of enclosure rail bars (12311) are arranged spaced apart in the width (W) direction and connected to a rack rail guide (12312). An enclosure rail groove (12311a) is formed on each side of the pair of enclosure rail bars (12311) so that an enclosure guide pin (12333), which will be described later, is inserted and slides therein. A rack rail (113) is arranged between the pair of enclosure rail bars (12311) so as to be movable in the length (L) direction.

[0092] The rack rail guide (12312) is formed to surround both sides (left and right sides) and the upper surface in the width (W) direction of the rack rail (113) to guide the rack rail (113). The rack rail guide (12312) connects a pair of enclosure rail bars (12311). A rail insulator (1235) is arranged between the rack rail guide (12312) and the rack rail (113). A plurality of rack rail guides (12312) may be provided, and the plurality of rack rail guides (12312) are arranged to be spaced apart from each other in the length (L) direction. A plurality of rail insulators (1235) may be provided corresponding to the plurality of rack rail guides (12312).

[0093] The front rail stopper (12313) is positioned at the front of the enclosure rail bar (12311) so as to be in contact with the stopper pin (113a) of the rack rail (113). The rear rail stopper (12314) is positioned at the rear of the enclosure rail bar (12311) so as to be in contact with the stopper pin (113a) of the rack rail (113).

[0094] The stopper pin (113a) protrudes in the width (W) direction of the rack rail (113) and comes into contact with the front rail stopper (12313) when the rack (110) is pulled out and comes into contact with the rear rail stopper (12314) when the rack (110) is stored. The stopper pin (113a) is positioned forward of the center in the length (L) direction of the rack rail (113).

[0095] The front rail stopper (12313) and the rear rail stopper (12314) are formed of a non-conductive material in the portion that comes into contact with the stopper pin (113a) to insulate the rack rail (113) and the enclosure rail (1231).

[0096] Referring to FIG. 13, the enclosure guide (1233) includes a pair of enclosure guide bars (12331) formed to be long in the length (L) direction (front-back direction), an enclosure guide connector (12332) arranged on the pair of enclosure guide bars (12331), and an enclosure guide pin (12333) arranged in front of the enclosure guide bars (12331).

[0097] A pair of enclosure guide bars (12331) are spaced apart in the width (W) direction and connected to an enclosure guide connector (12332). A pair of enclosure guide pins (12333) are respectively arranged at the front of each of the pair of enclosure rail bars (12311). An enclosure rail (1231) is arranged between the pair of enclosure guide bars (12331) so as to be movable in the length (L) direction.

[0098] An enclosure guide connector (12332) connects a pair of enclosure guide bars (12331). The enclosure guide connector (12332) is coupled to the inner upper side of the enclosure body (121). A plurality of enclosure guide connectors (12332) may be provided, and the plurality of enclosure guide connectors (12332) are arranged to be spaced apart in the length (L) direction.

[0099] The enclosure guide pin (12333) is inserted into the enclosure rail groove (12311a). When the rack (110) is pulled out or stored, the enclosure rail (1231) is guided by the enclosure guide pin (12333) that is slidably connected to the enclosure rail groove (12311a).

[0100] When the rack (110) is pulled out, the rack rail (113) is guided by the rack rail guide (12312) and moves forward. When the stopper pin (113a) contacts the front rail stopper (12313), the enclosure rail (1231) moves forward. In this way, the rack (110) can be pulled out in a double sliding manner by the distance between the front rail stopper (12313) and the rear rail stopper (12314) and the length of the enclosure rail groove (12311a).

[0101] FIG. 14 is a partial front view of an energy storage device according to one embodiment of the present invention.

[0102] An internal fan (128) is arranged between two adjacent racks (110) to flow air between the two adjacent racks (110). The internal fan (128) is coupled to a fan supporter (122) that is coupled to two adjacent rack frames (111). The internal fan (128) is arranged between any two of a plurality of battery management systems (141). The battery management systems (141) can be quickly cooled by the internal fan (128).

[0103] FIG. 15 is a diagram showing air flow in an energy storage device according to one embodiment of the present invention.

[0104] External air is drawn into the plurality of intake holes (121a) by the plurality of suction fans (127) and flows from the upper to lower front side of the enclosure body (121). The flowing air flows smoothly from upper to lower side between the plurality of racks (110) or between the racks (110) and the side of the enclosure body (121).

[0105] The air flowing toward the front lower side of the enclosure body (121) flows from front to rear by a plurality of internal fans (128). The flowing air flows smoothly from front to rear between a plurality of racks (110) or between the racks (110) and the side of the enclosure body (121).

[0106] The air at the lower rear of the enclosure body (121) flows upward and is discharged to the outside through a plurality of discharge holes (121b). The flowing air flows smoothly from the lower side to the upper side and is discharged between a plurality of racks (110) or between the racks (110) and the side of the enclosure body (121).

[0107] By appropriately arranging a plurality of inlet holes (121a), a plurality of discharge holes (121b), a plurality of suction fans (127) and a plurality of internal fans (128) as in the embodiment, a flow of air is realized that can evenly cool a plurality of monoblocks (10) and a plurality of battery management systems (141) inside the enclosure body (121) with minimal energy.

[0108] Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and various modifications may be made by a person skilled in the art without departing from the gist of the present invention as claimed in the claims. Furthermore, such modifications should not be understood individually from the technical idea or prospect of the present invention.

Claims

1. A plurality of monoblocks in which a plurality of layers in which an oxidation reaction occurs are stacked in the height direction; A rack frame in which the above plurality of monoblocks are accommodated; A plurality of rack shelves on which the above rack frame is divided in the height direction and the plurality of monoblocks are mounted; A plurality of front panels arranged in the height direction on the front of the above rack frame; and A secondary battery comprising a plurality of battery management systems each arranged on the plurality of front panels to control the plurality of monoblocks.

2. In paragraph 1, A secondary battery further comprising a plurality of side supporters, each of which is arranged on a side of one of the plurality of rack shelves and supports a side of one of the plurality of monoblocks.

3. In paragraph 1, A secondary battery further comprising a plurality of wire clips arranged on one side of the plurality of rack shelves and supporting wires through which an electrical signal sensing the voltage of one of the plurality of monoblocks is transmitted.

4. In paragraph 1, A secondary battery further comprising a plurality of rack posts formed long in the height direction to connect to the plurality of rack shelves and arranged to protrude in the width direction from the rack frame.

5. In paragraph 4, A secondary battery further comprising a plurality of rack casters each coupled to the lower portion of the plurality of rack posts.

6. In paragraph 1, Each of the above plurality of front panels, a front panel base in the shape of a plate; and Includes a front panel cover coupled to the front panel base, The battery management system is disposed between the front panel base and the front panel cover, A secondary battery having an opening in the front panel cover to allow a connector to be inserted through which a wire for transmitting an electrical signal sensing the voltage of the plurality of monoblocks on the side is connected to the battery management system.

7. A plurality of monoblocks in which a plurality of layers in which each oxidation reaction occurs are stacked in the height direction; a plurality of racks each accommodating the plurality of monoblocks; and An energy storage system comprising an enclosure in which the plurality of racks are arranged in the width direction and accommodated.

8. In paragraph 7, The above enclosure is an energy storage system having a plurality of inlet holes formed on the upper surface through which external air is introduced.

9. In paragraph 8, An energy storage system wherein some of the plurality of inlet holes are disposed between the plurality of racks.

10. In paragraph 8, An energy storage system in which the plurality of inlet holes are arranged at the front of the upper surface of the enclosure.

11. In paragraph 8, An energy storage system further comprising a plurality of suction fans arranged in the plurality of inlet holes to flow external air into the interior of the enclosure.

12. In paragraph 8, Further comprising a power box that accommodates a power device for controlling the above plurality of monoblocks, An energy storage system in which the fraudulent battlefield box is arranged spaced apart from the upper side of at least some of the plurality of inlet holes.

13. In paragraph 7, An energy storage system further comprising a plurality of internal fans arranged between the plurality of racks to flow air from front to rear.

14. In paragraph 13, Further comprising a plurality of battery management systems each arranged in front of the plurality of racks to control the plurality of monoblocks, An energy storage system wherein any one of the plurality of internal fans is positioned between any two of the plurality of battery management systems.

15. In paragraph 7, The above enclosure is an energy storage system in which a plurality of discharge holes are formed on the upper surface through which air inside the enclosure is discharged to the outside.

16. In paragraph 15, An energy storage system wherein some of the plurality of discharge holes are disposed between the plurality of racks.

17. In paragraph 15, An energy storage system in which the plurality of discharge holes are arranged at the rear of the upper surface of the enclosure.

18. In paragraph 7, Each of the above plurality of racks, a rack frame in which the plurality of monoblocks are accommodated; and Includes a rack rail provided on the top of the above rack frame and formed lengthwise, An enclosure slider provided in the enclosure and slidingly coupled with the rack rail; and An energy storage system further comprising a rail insulation made of a non-conductive material provided between the enclosure slider and the rack rail.

19. In paragraph 18, The above enclosure slider, An enclosure rail that is slidably coupled with the above rack rail; and An energy storage system comprising an enclosure guide coupled to the enclosure and slidably coupled to the enclosure rail.

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