Battery rack and power storage device including same

Abstract

A battery rack according to one embodiment of the present invention includes at least one battery pack that has been used for a predetermined period of time or with a predetermined capacity, and a battery pack frame that houses the at least one battery pack and has a height greater than that of the at least one battery pack, wherein the at least one battery pack is provided with a service plug that can open the interior of the at least one battery pack.

Description

[Technical field]

[0001] The present invention relates to a battery rack and a power storage device including the same.

[0002] This application claims priority to Korean Patent Application No. 10-2021-0093532, filed on July 16, 2021, the entire contents of which are incorporated herein by reference in their entirety in the specification and drawings. [Background technology]

[0003] Secondary batteries, which have high applicability to various products and electrical properties such as high energy density, are widely used not only in portable devices but also in electric vehicles (EVs) and hybrid electric vehicles (HEVs) that are driven by electrical sources. These secondary batteries are attracting attention as a new energy source because they are environmentally friendly and improve energy efficiency as they do not produce any by-products associated with energy use, as well as having the primary advantage of dramatically reducing the use of fossil fuels.

[0004] Currently, types of secondary batteries that are widely used include lithium ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel metal hydride batteries, and nickel zinc batteries. The operating voltage of such a unit secondary battery cell, i.e., a unit battery cell, is about 2.5V to 4.5V. Therefore, when a higher output voltage is required, a battery pack is constructed by connecting a plurality of battery cells in series. Also, a battery pack may be constructed by connecting a plurality of battery cells in parallel according to a charge / discharge capacity required for the battery pack. Therefore, the number of battery cells included in the battery pack can be variously set according to a required output voltage or charge / discharge capacity.

[0005] In addition, when a battery pack is constructed by connecting a plurality of battery cells in series and parallel, a battery module including at least one battery cell is generally constructed first, and other components are added to the at least one battery module to construct a battery pack or a battery rack. Meanwhile, a power storage device is constructed by using at least one such battery rack as an energy source.

[0006] Meanwhile, battery packs used in conventional electric vehicles, etc., are usually discarded after a certain period of use or a certain capacity due to a decline in the driving performance of the vehicle, etc. Discarded battery packs usually contain cobalt oxide, lithium, manganese, nickel, etc., and therefore pose problems such as environmental pollution, fire, and electric shock.

[0007] In this way, battery packs that are discarded after being used in electric vehicles, i.e., about 70 to 80% of waste battery packs from electric vehicles, can be recycled in fields other than the energy source of the vehicle. In particular, such waste battery packs from electric vehicles can be reused in an energy storage system (ESS). Waste battery packs from electric vehicles that are reused in this way are also called reused battery packs.

[0008] Therefore, there is a need for a method for more stably reusing a battery pack that has been used for a certain period or capacity, i.e., a reused battery pack, in other fields such as a power storage device. In particular, in the case of a battery pack that has been used for a certain period or capacity, there is a greater risk of fire due to overheating, etc., so the design of a structure such as a battery pack frame that houses such a battery pack and a mechanism for preventing fire become more important factors. Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention aims to provide a battery rack and a power storage device including the same, which can stably store battery packs for reuse that have been used for a specified period of time or to a specified capacity, and can ensure safety even in the event of a fire caused by an abnormal situation such as overheating. [Means for solving the problem]

[0010] In order to achieve the above object, the present invention provides a battery rack including at least one battery pack that has been used for a predetermined period of time or with a predetermined capacity, and a battery pack frame that houses the at least one battery pack and has a height greater than that of the at least one battery pack, wherein the at least one battery pack is provided with a service plug that can open the interior of the at least one battery pack.

[0011] Cooling water may be injected into the battery pack frame such that the at least one battery pack is immersed in the cooling water to a predetermined height when an abnormal situation occurs in the at least one battery pack.

[0012] The service plug may open an interior of the at least one battery pack and guide the coolant to be directly injected into the interior of the at least one battery pack when internal pressure of the at least one battery pack rises to or above a predetermined pressure upon occurrence of the abnormal situation.

[0013] The service plug may be provided on a top surface of the at least one battery pack.

[0014] At least one water injection pipe for injecting the cooling water may be disposed on an upper portion of the battery pack frame.

[0015] The at least one water injection pipe may be provided with at least one sprinkler that sprays the cooling water toward the at least one battery pack.

[0016] The service plug may be located proximate to the at least one sprinkler.

[0017] The battery pack frame may be formed with at least one cable penetration portion through which at least one cable for electrically connecting to the at least one battery pack penetrates.

[0018] The at least one cable penetration may be fitted with at least one cable seal for preventing the cooling water from escaping.

[0019] The battery pack may be a battery pack used in an electric vehicle or a hybrid vehicle.

[0020] A plurality of the battery packs may be provided, and the plurality of battery packs may be stacked on one another along a height direction of the battery rack so as to be electrically connected to one another.

[0021] The present invention also provides a power storage device, the power storage device including at least one battery rack according to the above-described embodiments. Effect of the Invention

[0022] Through the various embodiments described above, it is possible to provide a battery rack and a power storage device including the same that can more stably accommodate reusable battery packs that have been used for a predetermined period of time or with a predetermined capacity, and can ensure safety even in the event of a fire caused by an abnormality such as overheating.

[0023] The following drawings attached to this specification illustrate preferred embodiments of the present invention and, together with the detailed description of the invention, serve to further understand the technical ideas of the present invention. Therefore, the present invention should not be interpreted as being limited to only the matters described in the drawings. [Brief description of the drawings]

[0024] [Figure 1] FIG. 2 is a diagram illustrating a battery rack according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a diagram for explaining a battery pack of the battery rack in FIG. 1. [Diagram 3] FIG. 2 is a diagram for explaining a battery pack frame of the battery rack in FIG. 1. [Figure 4] 5A to 5C are diagrams illustrating a support frame according to another embodiment of the battery pack frame of FIG. 3. [Diagram 5] FIG. 2 is a diagram for explaining a main part of the battery rack in FIG. [Figure 6] FIG. 2 is a diagram for explaining a mechanism for injecting cooling water to prevent the spread of fire when an abnormal situation occurs due to overheating of a battery pack in the battery rack of FIG. 1. [Figure 7] FIG. 2 is a diagram for explaining a mechanism for injecting cooling water to prevent the spread of fire when an abnormal situation occurs due to overheating of a battery pack in the battery rack of FIG. 1. [Figure 8] 8 is a diagram for explaining a mechanism for preventing cooling water from flowing into the battery pack arranged below the battery pack in which an abnormality has occurred when cooling water is injected as shown in FIG. 7. FIG. [Figure 9] 8 is a diagram for explaining a mechanism for preventing cooling water from flowing into the battery pack arranged below the battery pack in which an abnormality has occurred when cooling water is injected as shown in FIG. 7. FIG. [Figure 10] 1 is a diagram illustrating a power storage device according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings. The embodiments described herein are illustrative in order to facilitate understanding of the invention, and it should be understood that the present invention can be implemented in various forms different from the embodiments described herein. In addition, in order to facilitate understanding of the invention, the accompanying drawings may be drawn not to scale, with some components exaggerated or omitted, or shown in a schematic manner.

[0026] FIG. 1 is a diagram for explaining a battery rack according to one embodiment of the present invention.

[0027] 1, the battery rack 10 may include at least one battery pack 100 and at least one battery pack frame 200 accommodating the at least one battery pack 100. Here, the at least one battery pack 100 may include a service plug 150 that opens the interior of the at least one battery pack 100 and guides coolant to be directly injected into the at least one battery pack 100 when an abnormal situation occurs and the internal pressure of the at least one battery pack 100 rises above a predetermined pressure. The service plug 150 will be described in more detail in the following related description.

[0028] The at least one battery pack 100 may be a battery pack that has been used for a predetermined period or with a predetermined capacity. Specifically, the at least one battery pack 100 may be a battery pack that has been used in an electric vehicle or a hybrid vehicle. Such at least one battery pack may also be called a reused battery pack.

[0029] The battery pack 100 may be provided in a number of one or more. Hereinafter, in the present embodiment, the battery pack 100 will be described in a limited manner in which the battery pack 100 is provided in a number of pieces.

[0030] The battery pack 100 will now be described in more detail.

[0031] FIG. 2 is a diagram for explaining the battery packs of the battery rack in FIG.

[0032] Referring to FIG. 2 , the battery pack 100 may include a battery cell 110 , a pack case 130 , and a service plug 150 .

[0033] The battery cell 110 is a secondary battery and may be provided as a pouch-type secondary battery, a prismatic secondary battery, or a cylindrical secondary battery. Hereinafter, in this embodiment, the battery cell 110 is a secondary battery and will be described as a pouch-type secondary battery.

[0034] There may be at least one or more battery cells 110. Hereinafter, in this embodiment, the battery cell 110 will be described as being provided as a battery cell assembly in which a plurality of battery cells 110 are electrically connected to each other.

[0035] The pack case 130 may accommodate the plurality of battery cells 110 and various electrical components and a cooling unit constituting the battery pack 100. To this end, the pack case 130 may be provided with an accommodation space capable of accommodating the components constituting the battery pack 100 described above.

[0036] The service plug 150 can cut off the electrical connection of the battery pack 100 by a user's operation in order to prevent electric shock accidents of workers, etc., during inspection or management of the battery pack 100, and can be attached to the pack case 130 and electrically connected to the battery cells 110 and electrical components of the battery pack 100.

[0037] When an abnormal situation occurs and the internal pressure of the at least one battery pack 100 rises above a predetermined pressure, the service plug 150 may open the interior of the at least one battery pack 100 to guide the coolant to be directly injected into the interior of the at least one battery pack 100.

[0038] The service plug 150 may be provided on an upper surface of the battery pack 100, i.e., on an upper portion of the pack case 130, for ease of operation by a user such as an operator. Also, the service plug 150 may be provided on an upper surface of the pack case 130 near a lower portion of a water injection pipe 400, which will be described later, for smooth injection of cooling water into the battery pack 100 in the abnormal situation. Specifically, the service plug 150 may be disposed near at least one sprinkler 450 of the water injection pipe 400, which will be described later.

[0039] A plug cover 155 may be provided on an upper portion of the service plug 150, which can open the inside of the service plug 150 so that the inside of the pack case 130 of the battery pack 100 communicates with the outside when the internal pressure of the battery pack 100 rises to or above a predetermined pressure. The plug cover 155 may operate to open the inside of the service plug 150 when the internal pressure of the battery pack 100 rises to or above a predetermined pressure. The opening operation of the plug cover 155 may be performed in a passive manner or an active manner. For example, the plug cover 155 may be provided as a rotating structure or a valve structure that opens at a predetermined pressure, or may be provided as a rotating structure or a valve structure that is connected to an electrical control unit of the battery pack 100 and operates under the control of the electrical control unit at a predetermined pressure. This is merely an example, and the opening and closing structure of the plug cover 155 may be another type of structure that can open the service plug 150 when the internal pressure of the battery pack 100 rises to or above a predetermined pressure.

[0040] The at least one battery pack frame 200 may accommodate the at least one battery pack 100 that has been used for a predetermined period of time or with a predetermined capacity, and may have a height greater than that of the at least one battery pack 100.

[0041] The at least one battery pack frame 200 may be filled with cooling water C therein such that the at least one battery pack 100 is immersed in the cooling water to a predetermined height when an abnormal situation occurs due to overheating of the at least one battery pack 100.

[0042] The at least one battery pack frame 200 more stably accommodates the at least one battery pack 100 that has been used for the specified period or to the specified capacity, and when a dangerous situation such as a fire occurs due to an abnormality such as overheating of the at least one battery pack 100, the dangerous situation such as a fire can be more quickly extinguished by the cooling water C filled inside.

[0043] A plurality of the battery pack frames 200 may be provided, and the plurality of battery pack frames 200 may be arranged to be stacked on one another along the height direction of the battery rack 10.

[0044] Hereinafter, the at least one battery pack frame 200 will be specifically connected.

[0045] FIG. 3 is a diagram for explaining a battery pack frame of the battery rack in FIG.

[0046] Referring to FIG. 3, the battery pack frame 200 may have an exposed upper portion and may have an accommodating space therein for accommodating the at least one battery pack 100.

[0047] At least one water injection pipe 400 (see FIG. 5 ) for injecting the cooling water C may be disposed on an upper portion of the battery pack frame 200. The at least one water injection pipe 400 will be described in more detail in the following related description.

[0048] In addition, at least one smoke detection sensor 500 (see FIG. 5) capable of detecting smoke when an abnormal situation occurs due to overheating of the at least one battery pack 100 may be provided on an upper portion of the battery pack frame 200. The at least one smoke detection sensor 500 will be described in more detail in the following related description.

[0049] In addition, the at least one smoke detection sensor 500 (see FIG. 5) may be attached to an upper portion of the battery pack frame 200, and a sensor support 600 may be provided to support the at least one smoke detection sensor 500. The sensor support 600 will be described in more detail in the following related description.

[0050] The battery pack frame 200 may include a water bath frame 210 and a support frame 250.

[0051] The water tub frame 210 accommodates the at least one battery pack 100, has an exposed upper portion, and may have an accommodating space therein to be filled with the cooling water C (see FIG. 7).

[0052] The water tub frame 210 may include at least one cable penetration 212 , at least one cable seal 214 , a cooling inlet penetration 215 , a cooling outlet penetration 216 , an inlet seal 217 , and an outlet seal 218 .

[0053] The at least one cable through-hole 212 is formed on one side of the battery pack frame 200, specifically, on one side of the water tub frame 210, through which at least one cable 700 for electrically connecting with the at least one battery pack 100 can pass.

[0054] The at least one cable sealing member 214 is for preventing the cooling water C from flowing out through the at least one cable penetration portion 212 and can be attached to the at least one cable penetration portion 212 .

[0055] Furthermore, the at least one cable sealing member 214 may be attached to the at least one cable penetration portion 212. The at least one cable sealing member 214 may prevent the cooling water C (see FIG. 7) from flowing out of the water bath frame 210 through the cable penetration portion 212 when the water bath frame 210 is filled with the cooling water C (see FIG. 7).

[0056] The cooling inlet penetration part 215 is formed on one side of the battery pack frame 200, specifically, on one side of the water tub frame 210, and a cooling inlet 800 for cooling the battery pack 100 may penetrate therethrough.

[0057] The cooling outlet penetration portion 216 is formed on one side of the battery pack frame 200, specifically, on one side of the water tub frame 210, and a cooling outlet 900 for cooling the battery pack 100 may be penetrated therethrough.

[0058] The inlet sealing member 217 may be attached to the cooling inlet penetration portion 215. The inlet sealing member 217 may prevent the cooling water C (see FIG. 7) from flowing out of the water bath frame 210 through the cooling inlet penetration portion 215 when the water bath frame 210 is filled with the cooling water C (see FIG. 7).

[0059] The outlet sealing member 218 may be attached to the cooling outlet penetration portion 216. The outlet sealing member 218 may prevent the cooling water C (see FIG. 7) from flowing out of the water tank frame 210 through the cooling outlet penetration portion 216 when the water tank frame 210 is filled with the cooling water C (see FIG. 7).

[0060] The support frame 250 may be provided at the bottom of the aquarium frame 210 and may have an edge that protrudes outward from the edge of the bottom surface of the aquarium frame 210. That is, the support frame 250 may be formed to have an area larger than the area of ​​the bottom of the aquarium frame 210.

[0061] The support frame 250 can ensure the rigidity of the battery pack frame 200. Furthermore, when the cooling water C (see FIG. 8) overflows to the outside of the water-tub frame 210, the support frame 250 can prevent the cooling water C from permeating into the inside of the water-tub frame 210 of the adjacent battery pack frame 200.

[0062] FIG. 4 is a view for explaining a support frame according to another embodiment of the battery pack frame of FIG.

[0063] Referring to FIG. 4 , the battery pack frame 205 may include a water bath frame 210 and a support frame 255.

[0064] The water tank frame 210 is substantially the same as or similar to the above-described embodiment, and therefore, a duplicated description will be omitted below.

[0065] A raised portion 257 having a predetermined height may be formed on the edge of the support frame 255 to prevent the cooling water C (see FIG. 9) from flowing down when the cooling water C flows out from the water bath frame 210.

[0066] By the rising portion 257, an additional cooling water storage space capable of secondarily storing the cooling water C at a predetermined height may be formed at an edge of the support frame 255. In addition, a drain pipe for draining the cooling water C may be connected to one side of the additional cooling water storage space formed at the edge of the support frame 255.

[0067] Other main components of the battery rack 10 will be described in detail below.

[0068] FIG. 5 is a diagram for explaining a main part of the battery rack in FIG.

[0069] Referring to FIG. 5 , the battery rack 10 may further include a rack frame 300, a water injection pipe 400, a smoke detection sensor 500, a sensor support 600, at least one cable 700, a cooling inlet 800, and a cooling outlet 900.

[0070] The rack frame 300 may support the multiple battery pack frames 200 and guide the multiple battery pack frames 200 to be stacked in the vertical direction.

[0071] The water injection pipes 400 may be provided in plurality and disposed on the upper part of each battery pack frame 200. The water injection pipes 400 may be connected to a cooling water tank (not shown) provided outside the battery rack 10.

[0072] Each water injection pipe 400 may be provided with at least one sprinkler 450 that sprays the cooling water C toward the at least one battery pack 100.

[0073] The at least one sprinkler 450 may be disposed on the upper part of the battery pack 100 at the upper part of the battery pack frame 200. At least one or more sprinklers 450 may be provided. Hereinafter, the present embodiment will be described with reference to the case where a plurality of sprinklers 450 are provided.

[0074] The smoke detection sensor 500 may detect smoke emitted from the battery pack 100 to detect a fire condition when a fire condition occurs due to overheating of the battery pack 100, etc.

[0075] The smoke detection sensor 500 may be disposed on the upper portion of the service plug 150 of the battery pack 100 where smoke is most likely to leak out of the battery pack 100 first.

[0076] The sensor support 600 is for more stably supporting the smoke detection sensor 500, and may be provided in the form of a rod having a predetermined length and attached to the water tub frame 210 of the battery pack frame 200.

[0077] The at least one cable 700 is for connecting electrical components in the battery pack 100 to an external electrical unit, and can be connected to the battery pack 100 .

[0078] The at least one cable 700 may pass through the cable pass-through portion 212 of the water tub frame 210 of the battery pack frame 200 to be connected to the battery pack 100 within the water tub frame 210.

[0079] An outer surface of the at least one cable 700 may be coated with a waterproof sealant to prevent an electrical short circuit when the water bath frame 210 is filled with the cooling water C (see FIG. 7).

[0080] The cooling inlet 800 is for cooling the battery pack 100 and may connect an external cooling unit to the battery pack 100. The cooling inlet 800 may be connected to the battery pack 100 within the water bath frame 210 by passing through the cooling inlet penetration portion 215 of the water bath frame 210.

[0081] The cooling outlet 900 is for cooling the battery pack 100 and may connect an external cooling unit to the battery pack 100. The cooling outlet 900 may be connected to the battery pack 100 within the water bath frame 210 by passing through the cooling inlet penetration portion 215 of the water bath frame 210.

[0082] Hereinafter, a mechanism for preventing the spread of fire when an abnormal situation occurs due to overheating of the battery packs 100 of the battery rack 10 according to the present embodiment will be described in detail.

[0083] 6 and 7 are diagrams for explaining a cooling water injection mechanism for preventing the spread of fire when an abnormal situation occurs due to overheating of the battery packs of the battery rack of FIG. 1.

[0084] 6 and 7, an abnormal situation may occur in at least one specific battery pack 100 in the battery rack 10. In the case of the battery pack 100, since it is a reused battery pack 100 that has been used for a certain period or capacity, an abnormal situation such as overheating may occur, which may lead to a risk of fire.

[0085] In this embodiment, when a fire or the like occurs due to an abnormal condition such as overheating in a particular battery pack 100, for example, a battery pack 100 arranged on the top layer of the battery rack 10, the fire can be contained more quickly in the particular battery pack 100 where the fire has occurred, and heat propagation to the adjacent battery pack 100 can be blocked more quickly.

[0086] Specifically, when the battery pack 100 overheats due to an abnormal situation and generates smoke or flames, the smoke detection sensor 500 can quickly detect the abnormal situation by detecting smoke, etc. When the smoke detection sensor 500 detects the smoke, the cooling water C can be quickly sprayed from the sprinkler 450 of the water injection pipe 400 disposed on the upper part of the battery pack 100 where the abnormal situation has occurred toward the battery pack 100 where the abnormal situation has occurred.

[0087] At this time, the plug cover 155 of the service plug 150 of the battery pack 100 may be opened when the internal pressure of the battery pack 100 rises above a predetermined pressure, thereby allowing the inside of the battery pack 100 to communicate with the outside.

[0088] As a result, the opened service plug 150 allows the cooling water C sprayed from the spring cooler 450 to be directly injected into the interior of the battery pack 100, making it possible to more quickly extinguish the fire and more quickly block heat propagation to the adjacent battery pack 100.

[0089] The spraying of the cooling water C by the sprinkler 450 may be continued until the battery pack 100 is submerged in the water tank frame 210 of the battery pack frame 200 so as to more reliably prevent a fire situation in the battery pack 100.

[0090] 8 and 9 are diagrams for explaining a mechanism for preventing coolant from flowing into the battery pack disposed below the battery pack in which an abnormality occurs when coolant is injected as shown in FIG.

[0091] Referring to FIG. 8 , when the cooling water C is sprayed by the sprinkler 450, the cooling water C may overflow to the outside of the water tank frame 210 of the battery pack frame 200.

[0092] In this embodiment, the support frame 250 of the battery pack frame 200 is arranged to protrude outward from the water tank frame 210, so that even if the cooling water C overflows outside the water tank frame 210, the cooling water C can be prevented from entering the adjacent battery pack 100, specifically, the battery pack 100 located at the bottom.

[0093] As a result, in this embodiment, the support frame 250 can effectively prevent damage that may be caused by the cooling water C to other battery packs 100, etc., in which the fire situation is not occurring.

[0094] Referring to FIG. 9, when the support frame 255 of the battery pack frame 205 is provided with the rising portion 257, if the cooling water C overflows outside the water tank frame 210, the cooling water C can be secondarily accommodated in the internal space created by the rising portion 257.

[0095] As a result, even if the cooling water C overflows outside the water tank frame 210, the cooling water C is further accommodated at a predetermined height within the internal space by the rising portion 257, so that the time for the cooling water C to flow down can be further delayed. Also, by stopping the spraying of the cooling water C from the sprinkler 450 during the delay time, the cooling water C can be more reliably prevented from flowing down.

[0096] Here, it is possible to further connect another additional drainage pipe or the like to the internal space formed by the rising portion 257, and in this case, the cooling water C can be discharged through the additional drainage pipe or the like, thereby more reliably preventing the risk of the cooling water C seeping into the battery pack 100 below.

[0097] FIG. 10 is a diagram for explaining a power storage device according to an embodiment of the present invention.

[0098] Referring to FIG. 10 , the power storage device 1 may include at least one battery rack 10 of the above-described embodiments and a rack container 50 that accommodates the at least one battery rack 10.

[0099] At least one or more battery racks 10 may be provided. Hereinafter, in this embodiment, the description will be limited to the case where a plurality of battery racks 10 are provided.

[0100] In addition, the multiple battery racks 10 may be provided as an assembly of a battery rack 10 made up of battery packs 100 that have been used for the specified period or with the specified capacity, and a battery rack made up of normal battery packs.

[0101] The rack container 50 is for accommodating the multiple battery racks 10 and may have an accommodating space for accommodating the multiple battery racks 10.

[0102] In this manner, the power storage device 1 according to this embodiment can also be constituted from the battery pack 100 (see FIG. 1) that has been used for a predetermined period or with a predetermined capacity, i.e., the battery pack 100 that has been used in an electric vehicle, a hybrid vehicle, or the like.

[0103] As described above, the power storage device 1 according to the present embodiment can be configured using the battery packs 100 used in automobiles, etc., which are normally discarded, thereby reducing costs by reusing resources and resolving problems such as environmental pollution caused by discarded battery packs 100.

[0104] Through the various embodiments as described above, it is possible to provide a battery pack frame 200 that can more stably accommodate a reusable battery pack 100 that has been used for a predetermined period or capacity and ensure safety even in the event of a fire caused by an abnormal situation such as overheating, as well as a battery rack 10 and a power storage device 1 including the battery pack frame 200.

[0105] Although the preferred embodiments of the present invention have been illustrated and described above, it goes without saying that the present invention is not limited to the specific preferred embodiments described above, and that various modifications can be made by those having ordinary skill in the art to which the invention pertains without departing from the gist of the present invention as claimed in the claims, and such modifications should not be understood individually from the technical ideas and perspectives of the present invention. [Explanation of symbols]

[0106] 1. Power storage device 10 Battery Rack 50 Rack Container 100 Reused Battery Packs 100 Battery Packs 110 Battery Cell 130 pack case 150 Service plug 155 Plug cover 200 Battery Pack Frame 205 Battery Pack Frame 210 Aquarium Frame 212 Cable penetration 214 Cable sealing material 215 Cooling inlet penetration 216 Cooling outlet penetration 217 Inlet sealing material 218 Outlet sealing material 250 Support Frame 255 Support Frame 257 Rising Section 300 Rack Frame 400 Water Injection Pipe 450 Spring Cooler 450 Sprinkler 500 Smoke detector 600 Sensor Support Stand 700 Cable 800 Cooling inlet 900 Cooling Outlet C Cooling water

Claims

1. A battery rack, At least one battery pack that has been used for a predetermined period of time or has a predetermined capacity; a battery pack frame that houses the at least one battery pack and has a height greater than that of the at least one battery pack; The at least one battery pack includes: a service plug capable of opening an interior of the at least one battery pack to inject cooling water into the at least one battery pack, the service plug opening the interior of the at least one battery pack and guiding the cooling water to be directly injected into the at least one battery pack when internal pressure of the at least one battery pack rises to or above a predetermined pressure upon occurrence of an abnormal situation.

2. A battery rack, At least one battery pack that has been used for a predetermined period of time or has a predetermined capacity; a battery pack frame that houses the at least one battery pack and has a height greater than that of the at least one battery pack; The at least one battery pack includes: a service plug capable of opening an interior of the at least one battery pack so as to inject cooling water into the interior of the at least one battery pack; The battery pack frame includes: When an abnormal situation occurs in the at least one battery pack, cooling water is injected into the at least one battery pack so that the at least one battery pack is immersed in the cooling water to a predetermined height.

3. The service plug is The battery rack according to claim 1 , wherein the battery rack is provided on an upper surface of the at least one battery pack.

4. The upper part of the battery pack frame is provided with: The battery rack according to claim 1, characterized in that at least one water injection pipe is arranged for injecting the cooling water.

5. The at least one water injection pipe has: The battery rack according to claim 4, further comprising at least one sprinkler for spraying the cooling water toward the at least one battery pack.

6. The service plug is 6. The battery rack of claim 5, wherein the battery rack is disposed near the at least one sprinkler.

7. The battery pack frame includes:

2. The battery rack according to claim 1, wherein at least one cable penetration portion through which at least one cable for electrically connecting with the at least one battery pack passes is formed.

8. The at least one cable passage has:

8. The battery rack according to claim 7, further comprising at least one cable sealing member for preventing the cooling water from leaking out.

9. The battery pack includes:

10. The battery rack according to claim 1, which is a battery pack used in an electric vehicle or a hybrid vehicle.

10. The battery pack is provided in plurality, The plurality of battery packs include The battery rack according to claim 1, characterized in that the battery racks are stacked on one another along a height direction of the battery rack so as to be electrically connected to one another.

11. A power storage device, characterized in that it comprises at least one battery rack according to any one of claims 1 to 10.

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