Energy storage device

Abstract

The utility model relates to the technical field of batteries, and discloses an energy storage device which comprises a battery cabin, a battery module, a diversion assembly and a cabinet door, and the energy storage cabinet is provided with an opening; the battery compartment is arranged in the energy storage cabinet and provided with one or more compartments, a compartment opening is only formed in the side, close to an opening, of each compartment, each compartment comprises a plurality of compartment walls, at least one of the compartment walls is provided with a cooling flow channel and an opening part, the opening parts are communicated with the cooling flow channels, the opening parts are arranged on the sides, located in the compartments, of the compartment walls, and the cooling flow channels are communicated with the opening parts. The cooling liquid release valve is arranged in the compartment and can be opened and release the cooling liquid when the target temperature is reached in the compartment; one or more battery modules are arranged in each compartment; the cabinet door seals the opening. According to the energy storage device, the temperature of the battery module can be adjusted, and the battery module can be independently isolated, so that directional fire fighting and extinguishing can be carried out in a compartment with thermal runaway, thermal diffusion is prevented, and the fire extinguishing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage cabinet fire fighting, in particular to an energy storage device. BACKGROUND

[0002] In the existing energy storage cabinet design, when the battery module appears thermal runaway, the high temperature or flame generated by the thermal runaway of the battery module will spread between the battery modules or between the battery clusters, thereby causing the thermal runaway spread and fire in the entire energy storage cabinet. After the thermal runaway spread occurs in the energy storage cabinet, the internal water fire fighting sprays fire fighting water to the single cluster or the entire battery compartment in the cabinet, which will cause the entire cabinet to be scrapped and increase the maintenance cost. Therefore, there is an urgent need for a new fire extinguishing design of the energy storage cabinet to reduce the risk of thermal runaway spread and reduce the damage of fire fighting intervention to the equipment. CONTENT OF THE UTILITY MODEL

[0003] The energy storage device provided by the embodiments of the present application can quickly realize directional fire fighting and extinguishing of the battery module with thermal runaway, effectively prevent thermal spread, and reduce the subsequent maintenance cost.

[0004] The energy storage device provided by the embodiments of the present application comprises a battery cabin, a battery module, a second flow guide plate and a cabinet door, and the energy storage cabinet has an opening; the battery cabin is arranged in the energy storage cabinet and has one or more compartments, the compartment has a cabin opening only on one side close to the opening, the compartment comprises a plurality of cabin walls, at least one of the plurality of cabin walls is provided with a cooling flow channel and an opening part, the opening part and the cooling flow channel are communicated, the opening part is arranged on one side of the cabin wall in the compartment, and is configured to be opened and release the cooling liquid when the target temperature in the compartment is reached; one or more battery modules are arranged in each compartment; and the cabinet door is closed to the opening.

[0005] According to the energy storage device provided by the embodiments of the present application, the battery module can be individually isolated by the compartment, the opening part can open the cooling flow channel when the battery module has thermal runaway, the cooling liquid can be sprayed to the compartment where the battery module has thermal runaway for fire fighting and extinguishing, and the risk that the normal battery module or the surrounding electrical devices in the other compartment are affected by the cooling liquid can be reduced, so that directional fire fighting and extinguishing in the compartment with thermal runaway can be realized, which is beneficial to rapid cooling and extinguishing, reduces the risk of damage of the battery module or the electrical devices without thermal runaway in the other compartment, and further reduces the cost of subsequent maintenance of the energy storage device. The cooling flow channel can also play a temperature regulating role for the battery module, reduce the heat transfer between the compartment and the surrounding components, reduce the risk of high temperature spreading to the normal battery module or electrical devices to cause thermal runaway, and is beneficial to improving the reliability of the energy storage device.

[0006] In some embodiments of the present application, the top cabin wall of the plurality of cabin walls is provided with a cooling flow channel and an opening part. In the above technical solution, when the battery module is in thermal runaway, the cooling liquid can be sprayed downward by gravity to the thermal runaway battery module, quickly and comprehensively cooling and extinguishing the thermal runaway battery module, which is conducive to improving the efficiency and effect of cooling and extinguishing operation.

[0007] In some embodiments of the present application, the plurality of cabins form at least one cabin group, the cabin group includes at least two cabins arranged in the up-down direction, any two adjacent cabins share a cabin wall in the up-down direction, and the upper and lower ends of the shared cabin wall are provided with opening parts. In the above technical solution, any two adjacent cabins share a cabin wall in the up-down direction, which can reduce material usage and weight, and is conducive to improving the energy density of the energy storage device. The upper and lower ends of the shared cabin wall are provided with fusible parts, so that each cabin has a cooling flow channel and an opening part. When the battery module is in thermal runaway, the cooling liquid can be sprayed from the top and bottom positions to extinguish the fire, which can improve the efficiency of fire extinguishing and enhance the cooling effect.

[0008] In some embodiments of the present application, the opening part is a valve component, a nozzle or a fusible material piece, the fusible material piece is configured to melt through the cabin wall and connect the cooling flow channel when the cabin reaches a target temperature. In the above technical solution, the opening part can be a valve component or a nozzle, which can be automatically opened to spray and extinguish the fire. The opening part can also be a material piece that can be melted by high temperature, which can be passively opened to spray and extinguish the fire, which is conducive to automation.

[0009] In some embodiments of the present application, the energy storage device includes a flow guide assembly configured to guide the cooling liquid in the cabin away from all battery modules. In the above technical solution, the flow guide assembly can guide the cooling liquid for fire extinguishing away from normal battery modules, which is also conducive to improving the reliability of normal battery modules and further reducing the maintenance cost of the energy storage device.

[0010] In some embodiments of the present application, the flow guide assembly comprises a first flow guide plate and a second flow guide plate, the first flow guide plate is arranged on the lower side of the bulkhead of the bottom and close to the hatch, the cabinet door is internally provided with a flow channel, the cabinet door is provided with an inlet communicating with the flow channel at a position corresponding to each first flow guide plate, one end of the second flow guide plate is arranged in the inlet, and the other end is located below the first flow guide plate. In the above technical solution, the first flow guide plate and the second flow guide plate are plate members, which are simple in structure, can reduce costs, and are convenient to operate. One end of the second flow guide plate is arranged in the inlet, and the other end is located below the first flow guide plate, which can receive the cooling liquid flowing out of the first flow guide plate from the lower side of the partition, and finally guide the cooling liquid to the flow channel, thereby realizing the orderly collection and discharge of the cooling liquid, effectively reducing the random flow of the cooling liquid inside the energy storage cabinet and affecting the direction of other battery modules, thereby reducing the probability of damage to other battery modules and improving the reliability of the energy storage device.

[0011] In some embodiments of the present application, the first flow guide plate is switchable between a stowed position and a released position on the bulkhead, and the first flow guide plate is located at the bottom of the bulkhead and does not protrude out of the hatch in the stowed position, and the first flow guide plate protrudes outward relative to the hatch in the released position. In the above technical solution, the first flow guide plate is located at the bottom of the bulkhead and does not protrude out of the hatch in the stowed position, so that the first flow guide plate does not protrude out of the hatch, reducing the probability of interference between the first flow guide plate and other components, and facilitating the assembly, maintenance and repair of the energy storage device. When the energy storage device is in a daily state, the first flow guide plate protrudes outward relative to the hatch in the released position, so that when the battery module appears thermal runaway, the first flow guide plate immediately cooperates with the second flow guide plate to guide the cooling liquid away from all battery modules, reducing the risk of mis-spraying the cooling liquid to good battery modules, and further reducing the subsequent maintenance cost of the energy storage device.

[0012] In some embodiments of the present application, the first flow guide plate is tightly attached to the bottom of the bulkhead in the stowed position, and is arranged obliquely downward toward the side close to the second flow guide plate in the released position. In the above technical solution, the first flow guide plate is tightly attached to the bottom of the bulkhead in the stowed position, which can reduce the occupation of the internal space of the partition, and reduce the probability of interference with the first flow guide plate during the installation, removal or daily maintenance of the battery module. When the first flow guide plate is switched to the released position, the side close to the second flow guide plate is arranged obliquely downward, which can use the action of gravity to guide the cooling liquid to the second flow guide plate, accelerate the flow speed of the cooling liquid, reduce the residence time on the surface of the first flow guide plate, and thus more quickly guide the cooling liquid to the flow channel, further reducing the risk of damage to the battery module caused by the cooling liquid, and improving the reliability of the energy storage device.

[0013] In some embodiments of the present application, the cabin wall bottom is provided with guide rails on both sides in the depth direction of the cabin, the guide rails extend in the depth direction, and the two ends of the first deflector plate are matched with the guide rails and are movable along the extension direction of the guide rails. In the above technical solution, the guide rails play a guiding and limiting role in the movement of the first deflector plate, which can reduce the probability that the deflection effect of the cooling liquid is affected by the position deviation of the first deflector plate, and can also make the first deflector plate quickly switch between the stowed position and the released position, thereby improving the reliability of the first deflector plate.

[0014] In some embodiments of the present application, the second deflector plate is switchable between the stowed position and the unfolded position on the cabinet door, the second deflector plate closes the inlet in the stowed position, and the second deflector plate opens the inlet outward and has one end located below the first deflector plate in the unfolded position. In the above technical solution, the second deflector plate closes the inlet in the stowed position, which can reduce the probability that foreign matter enters the inlet of the cabinet door and enters the flow channel in the cabinet door, thereby reducing the probability that the flow channel is blocked and affects the discharge of the cooling liquid, and can also reduce the probability of interference between the second deflector plate and other components. When the second deflector plate is in the unfolded position, the inlet is opened outward and one end is located below the first deflector plate, which can quickly and accurately receive the cooling liquid flowing down from the first deflector plate when the battery module in the cabin appears thermal runaway, guide the cooling liquid into the flow channel in the cabinet door, realize efficient collection and discharge of the cooling liquid, reduce the probability of damage to the intact battery module by the cooling liquid, and thereby reduce the subsequent maintenance cost.

[0015] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 A perspective structural schematic diagram of the energy storage device provided for some embodiments of the present application is shown in the figure.

[0018] Figure 2 A side view of part of the structure of the energy storage device provided for some embodiments of the present application is shown in the figure.

[0019] Figure 3 A front view of the energy storage device provided for some embodiments of the present application is shown in the figure, with the cabinet door removed.

[0020] Figure 4 A sectional view of the energy storage device provided for some embodiments of the present application is shown in the figure.

[0021] Figure 5 A diagram showing the first deflector in the stowed position and the second deflector in the stowed position for some embodiments of the present application;

[0022] Figure 6 A diagram showing the first deflector in the released position and the second deflector in the deployed position for some embodiments of the present application.

[0023] Icon:

[0024] 100, energy storage device;

[0025] 10, energy storage cabinet; 10a, opening;

[0026] 20, battery compartment; 21, compartment; 21a, hatch; 211, bulkhead; 212, cooling flow channel; 213, opening portion; 2111, guide rail;

[0027] 30, battery module;

[0028] 40, deflector assembly; 41, first deflector; 42, second deflector;

[0029] 50, cabinet door; 51, flow channel; 51a, inlet; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0031] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application; the specification, claims and above description of drawings of the present application, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. The specification and claims of the present application or the above description of drawings, the terms "first", "second" and the like are used to distinguish different objects, not to describe a particular order or primary and secondary relationship.

[0032] Reference to "an embodiment" or "the embodiment" in this application means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" or "in the embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive.

[0033] In the description of the application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "attachment" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0034] The term "and / or" in the application is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the application generally represents that the front and rear associated objects have an "or" relationship.

[0035] In the embodiments of the application, the same reference signs represent the same components, and for the sake of brevity, the detailed description of the same components is omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device, are only exemplary and should not constitute any limitation on the application.

[0036] "Multiple" appearing in the application means two or more (including two).

[0037] As an example, the battery module of the application is formed by arranging and fixing a plurality of battery monomers into an independent module. As an example, the battery module can be formed by bundling a plurality of battery monomers by a cable tie.

[0038] The battery cell includes a shell, an electrode assembly, and an electrolyte. The shell is used to accommodate the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode tab, a negative electrode tab, and a separator film. The battery cell mainly relies on the movement of metal ions between the positive electrode tab and the negative electrode tab to work. The positive electrode tab includes a positive current collector and a positive active material layer, and the positive active material layer is coated on the surface of the positive current collector. The positive current collector without the positive active material layer protrudes from the positive current collector with the positive active material layer, and the positive current collector without the positive active material layer serves as a positive electrode tab. Taking a lithium ion battery as an example, the material of the positive current collector can be aluminum, and the positive active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc. The negative electrode tab includes a negative current collector and a negative active material layer, and the negative active material layer is coated on the surface of the negative current collector. The negative current collector without the negative active material layer protrudes from the negative current collector with the negative active material layer, and the negative current collector without the negative active material layer serves as a negative electrode tab. The material of the negative current collector can be copper, and the negative active material can be carbon or silicon, etc. In order to ensure that the fusing does not occur when a large current passes through, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.

[0039] The material of the separator film can be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly can be a winding type structure or a laminated type structure, and the embodiments of the present application are not limited thereto.

[0040] In the existing energy storage cabinet design, when the battery module appears thermal runaway, the high temperature or flame generated by the thermal runaway of the battery module will spread between the battery modules or between the battery clusters, and then cause the thermal runaway to spread and catch fire in the entire energy storage cabinet. After the thermal runaway spreads in the energy storage cabinet, the internal water fire extinguishing system sprays fire extinguishing water on the single cluster or the entire battery compartment in the cabinet, which will cause the entire cabinet to be scrapped or increase the maintenance cost. Therefore, there is an urgent need for a new fire extinguishing design of the energy storage cabinet to reduce the risk of thermal runaway spread and the damage of fire extinguishing intervention to the equipment.

[0041] Based on the above considerations, in order to solve the problem that the fire extinguishing operation for the thermal runaway of the battery module causes the entire cabinet to be scrapped or increases the maintenance cost, the applicant designs an energy storage device, which comprises: an energy storage cabinet, a battery cabin, a battery module, and a cabinet door, the energy storage cabinet has an opening; the battery cabin is arranged in the energy storage cabinet and has one or more compartments, the compartment is provided with a hatch only on one side close to the opening, the compartment includes a plurality of compartment walls, at least one of the plurality of compartment walls is provided with a cooling flow channel and an opening part, the opening part and the cooling flow channel are communicated, and the opening part is arranged on one side of the compartment wall in the compartment and is configured to open and release the cooling liquid when the target temperature in the compartment is reached; one or more battery modules are arranged in each compartment; and the cabinet door is closed to the opening.

[0042] In the energy storage device of the structure, the battery module can be individually isolated by the cabin, the cooling flow channel can be opened by the opening part when the battery module is in thermal runaway, the cooling liquid can be sprayed to the battery module in thermal runaway, and the risk of mis-spraying the cooling liquid to the normal battery module or the surrounding electrical devices can be reduced, so that the battery module in thermal runaway can be targetedly extinguished, which is beneficial to rapid cooling and extinguishing, reduces the risk of damage of the battery module or the electrical devices without thermal runaway, and further reduces the cost of subsequent maintenance of the energy storage device. Meanwhile, the cooling flow channel can also play a temperature regulating role on the battery module, reduce the heat transfer between the cabin and the surrounding components, reduce the risk of high temperature spreading to the normal battery module or electrical devices to cause thermal runaway, and is beneficial to improving the reliability of the energy storage device.

[0043] The energy storage device disclosed by the embodiments of the present application can be used for, but is not limited to, devices requiring stable power supply, such as factories, shopping malls, office buildings, data centers, and new energy power stations.

[0044] According to some embodiments of the present application, with reference to Figures 1 to 6 The embodiments of the present application provide an energy storage device 100, which comprises an energy storage cabinet 10, a battery cabin 20, a battery module 30, and a cabinet door 50. The energy storage cabinet 10 has an opening 10a; the battery cabin 20 is arranged in the energy storage cabinet 10 and has one or more cabins 21, each cabin 21 is provided with a cabin opening 21a only on one side close to the opening 10a, and each cabin 21 comprises a plurality of cabin walls 211, at least one of the plurality of cabin walls 211 is provided with a cooling flow channel 212 and an opening part 213, the opening part 213 and the cooling flow channel 212 are communicated, the opening part 213 is arranged on one side of the cabin wall 211 in the cabin 21, and is configured to open and release the cooling liquid when the target temperature in the cabin 21 is reached. One or more battery modules 30 are arranged in each cabin 21. The cabinet door 50 is closed to the opening 10a.

[0045] The energy storage cabinet 10 can be a box structure for accommodating the battery cabin 20 and other components inside the energy storage device 100, and can provide a protection function for the battery cabin 20 and other components inside the energy storage device 100. The battery cabin 20 and the battery module 30 can be isolated from the external environment, thereby reducing the probability of dust, water vapor, and the like entering the inside of the energy storage device 100. The energy storage cabinet 10 has an opening 10a, which can be the entrance and exit of the entire energy storage cabinet 10, and can facilitate the assembly of the battery cabin 20, the battery module 30, and the like.

[0046] The battery compartment 20 can refer to a component used to house the battery module 30. The battery compartment 20 has one or more compartments 21; that is, the number of compartments 21 can be, but is not limited to, one, two, three, four, five, etc. Each compartment 21 can contain one or more battery modules 30. The battery module 30 can refer to the core component of the energy storage device 100, and each compartment 21 contains one or more battery modules 30 to meet the energy storage requirements of the energy storage device 100.

[0047] Each compartment 21 has a hatch 21a on the side closest to the opening 10a, thus each compartment 21 has a drawer structure, and the different compartments 21 are separated from each other and are independent spaces. The battery modules 30 enter the compartment 21 through the hatch 21a, so the battery modules 30 inside the energy storage cabinet 10 can be separated from each other through the compartments 21.

[0048] The compartment 21 may include multiple bulkheads 211, which together enclose the compartment 21. At least one of the multiple bulkheads 211 is provided with a cooling channel 212 and an opening 213. For example, the multiple bulkheads 211 are arranged on the left, right, upper, lower and rear sides of the compartment 21, while there is no bulkhead 211 on the front side to form a hatch 21a. The multiple bulkheads 211 may refer to one having a cooling channel 212 and an opening 213, multiple having a cooling channel 212 and an opening 213, or all having a cooling channel 212 and an opening 213.

[0049] An opening 213 is located on the side of the bulkhead 211 within the compartment 21. In the above embodiment, the target temperature mentioned refers to the temperature value generated when the battery module 30 experiences thermal runaway. The opening 213 can form a coolant spray nozzle on the inner side of the bulkhead 211 through the cooling channel 212, thereby spraying coolant into the compartment 21 to extinguish the thermal runaway battery module 30. For example, the coolant can be fire-fighting water, and the shape of the cooling channel 212 can be, but is not limited to, serpentine, grid-like, and irregular shapes. The coolant in the cooling channel 212 can both heat the battery module 30 and cool it down, thereby achieving temperature regulation of the battery module 30.

[0050] For the convenience of understanding, a specific example is described. The cooling liquid is cooling water, and the compartments 21 are multiple, and each compartment 21 is provided with a battery module 30. When the battery module 30 in one or more of the multiple compartments 21 is in thermal runaway, the opening part 213 opens the cooling flow channel 212, and the cooling water can be sprayed out of the opening part 213 to extinguish the fire of the battery module 30 in thermal runaway, to extinguish the possible fire, and to extinguish the fire and prevent the spread of heat, thereby reducing the probability of the spread of the thermal runaway of the battery module 30. Since each compartment 21 is an independent space, the flammable smoke or fire will not spread to other compartments 21 when the cooling water extinguishes the fire of the battery module 30 in thermal runaway, thereby reducing the influence of the flammable smoke or fire on the battery module 30 in other compartments 21, and thus achieving directional fire extinguishing of the battery module 30 in the specific compartment 21.

[0051] It should be noted that when the compartment 21 is one, the compartment 21 can isolate the battery module 30 from other electrical devices in the energy storage cabinet 10. The electrical devices can be a battery management system, an energy storage converter, a main control and communication system, etc. Thus, when the battery module 30 is in thermal runaway and on fire, the occurrence and extinguishment of the flammable smoke or fire are completed in the compartment 21, which can effectively reduce the risk of the spread of the flammable smoke or fire to the location of the electrical devices, can reduce the risk of damage to the electrical devices, and is beneficial to reduce property loss. When the compartments 21 are multiple, the multiple compartments 21 can isolate the multiple battery modules 30 from each other. When the battery module 30 in one or more of the compartments 21 is in thermal runaway and on fire, the above scheme can effectively prevent the spread of the fire to the location of the electrical devices, and can also avoid the spread to other compartments 21 that are not in thermal runaway, thereby reducing the risk of ignition of other battery modules 30 in thermal runaway, reducing the risk of damage to the electrical devices and other battery modules 30, and reducing property loss.

[0052] According to the energy storage device 100 of this application embodiment, the battery module 30 can be isolated separately through the compartment 21. When the battery module 30 experiences thermal runaway, the opening part 213 can open the cooling channel 212 to spray coolant onto the compartment 21 where the thermal runaway battery module 30 is located for fire extinguishing. This also reduces the risk of coolant being accidentally sprayed into other compartments 21, thereby reducing the risk of normal battery modules 30 or surrounding electrical components in other compartments 21 being affected by the coolant. This enables directional fire extinguishing in the compartment 21 where thermal runaway has occurred, which is beneficial for rapid cooling and fire extinguishing, and reduces the risk of damage to battery modules 30 or electrical components in other compartments 21 that have not experienced thermal runaway, thereby reducing the cost of subsequent maintenance of the energy storage device 100. Meanwhile, the cooling channel 212 can also regulate the temperature of the battery module 30, reduce the heat transfer between the compartment 21 and the surrounding components, reduce the risk of thermal runaway caused by the spread of high temperature to the normal battery module 30 or electrical components, and help improve the reliability of the energy storage device 100.

[0053] In some embodiments of this application, reference is made to Figures 4 to 6 The top bulkhead 211 among the multiple bulkheads 211 is provided with cooling channels 212 and openings 213. In the above technical solution, when the battery module 30 experiences thermal runaway, the coolant can be sprayed from top to bottom onto the thermally runaway battery module 30 under the action of gravity, quickly and comprehensively cooling and extinguishing the thermally runaway battery module 30, which is beneficial to improving the efficiency and effectiveness of cooling and extinguishing operations.

[0054] In some embodiments of this application, reference is made to Figures 2 to 4 There are multiple compartments 21, and the multiple compartments 21 form at least one compartment group. The compartment group includes at least two compartments 21 arranged in the vertical direction. Any two adjacent compartments 21 share a bulkhead 211 in the vertical direction, and the upper and lower ends of the shared bulkhead 211 are provided with openings 213.

[0055] The number of compartments 21 in the bulkhead assembly can be, but is not limited to, two, three, four, five, etc. The "vertical direction" can be referenced. Figure 4 The third party to Z. Multiple compartments 21 can form a compartment group or multiple compartment groups, exemplarily, refer to Figure 3 Multiple compartments 21 form four compartment groups, which are arranged along a first direction X. Each compartment group includes eight compartments 21 arranged along a third direction Z.

[0056] In the above technical solution, any two adjacent compartments 21 share a bulkhead 211 in the up-down direction, which can reduce the amount of material, reduce the weight, and help to improve the energy density of the energy storage device 100. The upper and lower ends of the shared bulkhead 211 are provided with opening parts 213, so that for the compartments 21 in the middle position, the upper and lower bulkheads 211 of each compartment 21 have cooling flow channels 212 and opening parts 213. When the battery module 30 is in thermal runaway, the cooling liquid can extinguish the fire from the top and bottom of the battery module 30, which can improve the efficiency of fire extinguishing and cooling.

[0057] In some embodiments of the present application, the opening part 213 is a valve component, a nozzle or a fusible material piece, which is configured to melt through the bulkhead 211 and connect the cooling flow channel 212 when the target temperature in the compartment 21 is reached. The material of the fusible material piece can be, but is not limited to, low-melting-point aluminum alloy, plastic material, composite material, etc., and can melt at high temperature, so that it can melt through the bulkhead 211 and connect the cooling flow channel 212 when the target temperature is reached.

[0058] In the above technical solution, the opening part 213 can be a valve component or a nozzle, which can automatically open to spray and extinguish the fire. The opening part 213 can also be a material piece that can melt at high temperature, so as to passively open to spray and extinguish the fire, which is conducive to automation.

[0059] In some embodiments of the present application, referring to Figure 1 , Figure 2 , Figures 4 to 6 , the energy storage device 100 includes a flow guide assembly 40, which is configured to guide the cooling liquid in the compartment 21 away from all battery modules 30.

[0060] The flow guide assembly 40 can be a component that guides the cooling liquid away from all battery modules 30. The flow guide assembly 40 can concentrate the cooling liquid to flow away from all battery modules 30, so as to reduce the influence of the cooling liquid on the battery modules 30 that do not have thermal runaway. During the fire extinguishing process, the cooling liquid is guided by the flow guide assembly 40 of the bulkhead 211 at the bottom to be away from all battery modules 30, so that the cooling water does not overflow from the hatch 21a during the fire extinguishing process, which can reduce the risk of the cooling water entering the lower compartment 21 and affecting the battery modules 30 that do not have thermal runaway, thereby improving the reliability of other battery modules 30.

[0061] In the above technical solution, the flow guide assembly 40 can guide the cooling liquid for fire extinguishing to be away from the normal battery modules 30, which is also conducive to improving the reliability of the normal battery modules 30 and further reducing the maintenance cost of the energy storage device 100.

[0062] In some embodiments of the present application, with reference to Figure 2 , Figures 4 to 6 , the flow guide assembly 40 comprises a first flow guide plate 41 and a second flow guide plate 42, the first flow guide plate 41 is arranged at the lower side of the bottom bulkhead 211 and close to the hatch 21a, the cabinet door 50 is internally provided with a flow channel 51, the cabinet door 50 is provided with an inlet 51a communicating with the flow channel 51 at a position corresponding to each first flow guide plate 41, one end of the second flow guide plate 42 is arranged in the inlet 51a, and the other end is located below the first flow guide plate 41.

[0063] The first flow guide plate 41 can be equal in size to the length of the hatch 21a, for example, with reference to Figure 3 , in the first direction X, the size of the first flow guide plate 41 is equal to the size of the hatch 21a. Among them, the first flow guide plate 41 can be a concave arc-shaped plate or a U-shaped plate with water-blocking edges on both sides, etc.

[0064] In the above technical solution, the first flow guide plate 41 and the second flow guide plate 42 are plate members, which are simple in structure, can reduce costs, and are convenient to operate. One end of the second flow guide plate 42 is arranged in the inlet 51a, and the other end is located below the first flow guide plate 41, which can receive the cooling liquid flowing out of the first flow guide plate 41 from the bottom of the compartment 21. The cooling liquid can finally be guided to the flow channel 51 through the second flow guide plate 42, thereby realizing the orderly collection and discharge of the cooling liquid, effectively reducing the direction of the cooling liquid flowing randomly inside the energy storage cabinet 10 to affect other battery modules 30, thereby reducing the probability of damage to other battery modules 30 and improving the reliability of the energy storage device 100.

[0065] In some embodiments of the present application, with reference to Figure 5 and Figure 6 , the first flow guide plate 41 can be switched between a stowed position and a released position on the bulkhead 211. When the first flow guide plate 41 is in the stowed position, it is located at the bottom of the bulkhead 211 and does not protrude out of the hatch 21a. When the first flow guide plate 41 is in the released position, it protrudes outward relative to the hatch 21a.

[0066] In the above technical solution, when the first flow guide plate 41 is in the stowed position, it is located at the bottom of the bulkhead 211 and does not protrude out of the hatch 21a. Thus, the first flow guide plate 41 does not protrude out of the hatch 21a, which can reduce the probability of interference between the first flow guide plate 41 and other components, and facilitate the assembly, maintenance and repair operations of the energy storage device 100. When the energy storage device 100 is in a daily state, the first flow guide plate 41 protrudes outward relative to the hatch 21a when it is in the released position. When the battery module 30 appears thermal runaway, the first flow guide plate 41 immediately cooperates with the second flow guide plate 42 to guide the cooling liquid away from all battery modules 30, reducing the risk of mis-spraying the cooling liquid to good battery modules 30, and further reducing the subsequent maintenance cost of the energy storage device 100.

[0067] In some embodiments of the present application, with reference toFigure 5 The first guide plate 41 is close to the bottom of the bulkhead 211 in the stowed position and is obliquely arranged downward toward the side close to the second guide plate 42 in the released position.

[0068] In the above technical solution, the first guide plate 41 is close to the bottom of the bulkhead 211 in the stowed position, which can reduce the occupation of the internal space of the compartment 21 and reduce the probability of interference with the first guide plate 41 during the installation, removal or daily maintenance of the battery module 30. When the first guide plate 41 is switched to the released position, it is obliquely arranged downward toward the side close to the second guide plate 42, which can guide the cooling liquid to the second guide plate 42 by gravity, accelerate the flow speed of the cooling liquid, reduce the residence time on the surface of the first guide plate 41, and thus more quickly guide the cooling liquid to the flow channel 51, further reduce the risk of damage to the battery module 30 by the cooling liquid, and improve the reliability of the energy storage device 100.

[0069] In some embodiments of the present application, with reference to Figure 5 and Figure 6 The bottom of the bulkhead 211 is provided with guide rails 2111 on both sides in the depth direction of the compartment 21, the guide rails 2111 extend in the depth direction, and the two ends of the first guide plate 41 are fitted on the guide rails 2111 and are movable along the extension direction of the guide rails 2111.

[0070] The depth direction of the compartment 21 can refer to the second direction Y of Figure 2 , Figures 4 to 6 .

[0071] In the above technical solution, the guide rails 2111 guide and limit the movement of the first guide plate 41, which can reduce the probability that the first guide plate 41 affects the flow guiding effect of the cooling liquid due to position deviation, and also allows the first guide plate 41 to quickly switch between the stowed position and the released position, thereby improving the reliability of the first guide plate 41.

[0072] In some embodiments of the present application, with reference to Figure 5 and Figure 6 The second guide plate 42 is switchable between the closed position and the unfolded position on the cabinet door 50. The second guide plate 42 closes the inlet 51a in the closed position, and opens the inlet 51a outward and has one end below the first guide plate 41 in the unfolded position.

[0073] In the above technical solution, the second guide plate 42 closes the inlet 51a in the closed position, which can reduce the probability of impurities entering the inlet 51a into the flow channel 51 in the cabinet door 50, thereby reducing the probability of flow channel 51 blockage affecting the discharge of the cooling liquid, and also reducing the probability of interference between the second guide plate 42 and other components. The second guide plate 42 can open the inlet 51a outward and be located below the first guide plate 41 in the unfolded position. When the battery module 30 in the compartment 21 experiences thermal runaway, the cooling liquid flowing from the first guide plate 41 can be quickly and accurately collected and guided into the flow channel 51 in the cabinet door 50, achieving efficient collection and discharge of the cooling liquid, reducing the probability of the cooling liquid damaging the intact battery module 30, and thereby reducing the subsequent maintenance cost.

[0074] In some embodiments of the present application, the cabinet door 50 is provided with a driving component that is linked with the plurality of second guide plates 42 to drive the plurality of second guide plates 42 to switch between the closed position and the unfolded position synchronously.

[0075] The driving component can be, but is not limited to, a motor, a pneumatic cylinder, a hydraulic motor, etc., which is connected to the second guide plate 42 through a connecting rod mechanism, a gear transmission or a belt transmission, etc., to achieve synchronous driving. For example, the driving component can be a motor, the motor shaft of which is connected to the rotating shaft of the second guide plate 42, and the motor can drive all the second guide plates 42 to rotate, or each second guide plate 42 has an independent motor drive. Alternatively, the driving component can also be a rotating latch of the cabinet door 50, which is linked with the plurality of second guide plates 42 through a gear linkage component, so as to drive the plurality of second guide plates 42 to be in the unfolded position when the rotating latch locks the cabinet door 50 on the energy storage cabinet 10, and to be in the closed position when the rotating latch is unlocked on the cabinet door 50.

[0076] In the above technical solution, the driving component is linked with the plurality of second guide plates 42, which can quickly realize the synchronous switching of the plurality of second guide plates 42 between the closed position and the unfolded position, avoiding the tedious steps of operating the second guide plates 42 one by one, and improving the operation efficiency.

[0077] In some embodiments of the present application, the cabinet door 50 is provided with an outlet communicating with the flow channel 51, and the bottom of the energy storage cabinet 10 is provided with an accommodation space capable of accommodating the cooling liquid discharged from the outlet.

[0078] In the above technical solution, the flow channel 51 in the cabinet door 50 guides the collected cooling liquid to the accommodation space at the bottom of the energy storage cabinet 10 through the outlet. The accommodation space can temporarily or permanently store the cooling liquid after fire extinguishing, preventing the cooling liquid from being directly discharged to the external environment of the energy storage cabinet 10 to cause pollution or other safety hazards, facilitating subsequent unified treatment and cleaning of the cooling liquid, and improving the environmental protection of the energy storage device 100 after fire extinguishing operation.

[0079] The utility model discloses an energy storage device 100. Figures 1 to 6 , according to the utility model embodiment provides a kind of energy storage device 100.

[0080] Energy storage device 100 includes: battery cabin 20, battery module 30, flow guide component 40 and cabinet door 50.

[0081] Battery cabin 20 is arranged in energy storage cabinet 10 and has multiple compartments 21, and one battery module 30 is arranged in each compartment 21. Compartment 21 is only provided with hatch in the front side close to opening 10a, and the top compartment wall, bottom compartment wall, left compartment wall, right compartment wall and rear compartment wall of each compartment 21 are provided with cooling flow channel 212, and multiple compartments 21 form four compartment groups, and the compartment group includes eight compartments 21 arranged in the up-down direction, any two adjacent compartments 21 share a compartment wall 211 in the up-down direction, and the upper and lower ends of the shared compartment wall 211 are provided with opening parts 213, the opening part 213 is arranged on one side of the top compartment wall in the compartment 21, the opening part 213 is communicated with the cooling flow channel 212, and the opening part 213 is a fusible material piece and is configured to melt the compartment wall 211 and communicate the cooling flow channel 212 when reaching the target temperature.

[0082] Flow guide component 40 includes first flow guide plate 41 and second flow guide plate 42, and the first flow guide plate 41 can be switched between the stowed position and the released position on the compartment wall 211. When the first flow guide plate 41 is in the stowed position, it is located at the bottom of the compartment wall 211 and does not protrude out of the hatch. When the first flow guide plate 41 is in the released position, it protrudes outward relative to the hatch. When the first flow guide plate 41 is in the stowed position, it is tightly attached to the bottom of the compartment wall 211, and when it is in the released position, it is arranged obliquely downward towards the side close to the second flow guide plate 42. The bottom of the compartment wall 211 is provided with guide rails 2111 on both sides in the depth direction of the compartment 21, and the guide rails 2111 extend in the depth direction. The two ends of the first flow guide plate 41 are fitted on the guide rails 2111 and can move along the extension direction of the guide rails 2111. The second flow guide plate 42 can be switched between the closed position and the unfolded position on the cabinet door 50. When the second flow guide plate 42 is in the closed position, it closes the entrance 51a, and when it is in the unfolded position, it can open the entrance 51a outward and one end is located below the first flow guide plate 41.

[0083] Energy storage cabinet 10 has an opening 10a, and cabinet door 50 is closed to the opening 10a. Flow channel 51 is arranged in cabinet door 50, and cabinet door 50 is provided with entrance 51a corresponding to the position of each first flow guide plate 41, which communicates with flow channel 51. Cabinet door 50 is provided with a driving component, and the driving component is linked with multiple second flow guide plates 42 to drive multiple second flow guide plates 42 to switch between the closed position and the unfolded position synchronously. Cabinet door 50 is provided with an outlet that communicates with flow channel 51, and the bottom of energy storage cabinet 10 is provided with a containing space that can contain the cooling liquid discharged from the outlet.

[0084] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other in the case of no conflict. The above is only the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, all the embodiments and optional embodiments of the present application can be combined to form new technical solutions if there is no special description. If there is no special description, all the technical features and optional technical features of the present application can be combined to form new technical solutions. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An energy storage device, characterized by, The energy storage device comprises: a storage cabinet having an opening; a battery compartment provided in the storage cabinet and having one or more compartments, each of the compartments being provided with a hatch only on one side close to the opening, the compartments comprising a plurality of walls, at least one of the walls being provided with a cooling flow channel and an opening part, the opening part and the cooling flow channel being in communication, the opening part being provided on the side of the wall inside the compartment and being configured to open and release cooling liquid when a target temperature is reached in the compartment; a battery module, one or more of the battery modules being provided in each of the compartments; a cabinet door closing the opening.

2. The energy storage device of claim 1, wherein, The wall at the top of the plurality of walls is provided with the cooling flow channel and the opening part.

3. The energy storage device of claim 2, wherein, The plurality of compartments form at least one compartment group, the compartment group comprising at least two compartments arranged in an up-down direction, any two adjacent compartments sharing one wall in the up-down direction, and the shared wall being provided with the opening part at both upper and lower ends.

4. The energy storage device of any one of claims 1-3, wherein, The opening part is a valve part, a nozzle or a fusible material part configured to melt through the wall and communicate the cooling flow channel when the target temperature is reached in the compartment.

5. The energy storage device of claim 1, wherein, The energy storage device comprises a flow guide assembly configured to guide the cooling liquid in the compartment away from all the battery modules.

6. The energy storage device of claim 5, wherein, The flow guide assembly comprises a first flow guide plate provided on the lower side of the wall at the bottom close to the hatch, and a second flow guide plate provided in the entrance of the cabinet door corresponding to the position of each first flow guide plate, one end of the second flow guide plate being provided in the entrance and the other end being located below the first flow guide plate.

7. The energy storage device of claim 6, wherein, The first flow guide plate is switchable between a stowed position and a released position on the wall, the first flow guide plate being located at the bottom of the wall and not extending out of the hatch in the stowed position, and the first flow guide plate extending outwards relative to the hatch in the released position.

8. The energy storage device of claim 7, wherein, The first flow guide plate is in close contact with the bottom of the wall in the stowed position, and is arranged obliquely downwards towards the side close to the second flow guide plate in the released position.

9. The energy storage device of claim 8, wherein, The bottom of the wall is provided with a guide rail on both sides in the depth direction of the compartment, the guide rail extending in the depth direction, and both ends of the first flow guide plate being fitted on the guide rail and being movable along the extension direction of the guide rail.

10. The energy storage device of any one of claims 6-9, wherein, The second flow guide plate is switchable between a closed position and an open position on the cabinet door, the second flow guide plate closing the entrance in the closed position, and the second flow guide plate opening the entrance outwards and locating one end below the first flow guide plate in the open position.

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