energy storage system

Abstract

The application discloses a kind of energy storage systems, belongs to battery technical field.Energy storage system includes multiple battery devices, first warehouse body and second warehouse body and fire prevention device, first warehouse body and second warehouse body, first warehouse body and second warehouse body are stacked along height direction, and first warehouse body is located above second warehouse body.Fire prevention device has oppositely arranged first end and second end, first end is rotatably connected to the bottom of first warehouse body or the top of second warehouse body, and second end is free end, and fire prevention device protrudes from the outer circumferential side of second warehouse body.The above-mentioned energy storage system has higher reliability.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to an energy storage system. Background Technology

[0002] With the rapid development of technology, electricity has become an indispensable energy source in people's production and daily life. To ensure a stable and reliable power supply and guarantee the normal operation of production and daily life, energy storage systems play a crucial role. They can store surplus electricity and release it back into the grid or directly supply power when needed, effectively realizing the recycling of electrical energy. Their applications are wide-ranging, covering industrial power supply, household power supply, emergency power supply, mobile power supply, wind power generation support, solar power generation support, and large-scale energy storage power stations. In the continuous development of energy storage technology, how to improve its reliability is a technical problem that urgently needs to be solved. Utility Model Content

[0003] In view of the above problems, this application provides an energy storage system that can improve the reliability of the energy storage system.

[0004] In a first aspect, this application provides an energy storage system comprising multiple battery devices, a first compartment and a second compartment, and a fire-resistant device. The first and second compartments each house multiple battery devices and are stacked along their height, with the first compartment positioned above the second compartment. The fire-resistant device has a first end and a second end disposed opposite to each other. The first end is rotatably connected to the bottom of the first compartment or the top of the second compartment, and the second end is a free end. The fire-resistant device protrudes from the outer periphery of the second compartment.

[0005] In the technical solution of this application embodiment, on the one hand, when the battery device in the second compartment experiences thermal runaway, the fireproof device protruding from the outer periphery of the second compartment can block the high temperature generated in the second compartment and the flame from spreading along the height direction to the first compartment, thereby reducing the risk of the first compartment catching fire due to the spread of fire in the second compartment, reducing the risk of fire aggravation, and effectively improving the reliability of the entire energy storage system.

[0006] In one or more embodiments of the first aspect, the fireproof device is inclined, and the height of the second end is lower than the height of the first end.

[0007] In the above scheme, because the fire prevention device is set at an angle and the height of the second end is lower than that of the first end, the path of the high-temperature flue gas rising upward in the height direction is longer, and the power required for the high-temperature flue gas to rise in the height direction is increased. At the same time, it is conducive to forming local vortices to reduce the mixing efficiency of high-temperature flue gas and oxygen. In this way, the risk of the first compartment catching fire due to the spread of fire in the second compartment is further reduced, and the reliability of the entire energy storage system is further improved.

[0008] In one or more embodiments of the first aspect, a lifting point is provided at the second end.

[0009] In the above scheme, since the free end of the fire protection device is equipped with a lifting point, it is convenient for the mechanized hoisting of the fire protection device, which helps to improve the installation convenience of the energy storage system.

[0010] In one or more embodiments of the first aspect, the fireproof device includes a main body and a first extension plate, the first extension plate being rotatably connected to one end of the main body in a first direction; the second direction, the first direction, and the height direction are perpendicular to each other; the fireproof device has a folded state and an unfolded state, in the folded state, the first extension plate and the main body are stacked along the height direction, and in the unfolded state, the first extension plate and the main body are arranged along the first direction.

[0011] In the above scheme, the first extension plate can increase the shielding area of ​​the fire protection device, which can shield a larger area of ​​high-temperature smoke, thereby further reducing the risk of the first compartment catching fire due to the spread of fire in the second compartment, and effectively improving the reliability of the entire energy storage system.

[0012] In one or more embodiments of the first aspect, a first groove is provided on one side of the body in the thickness direction, and in the folded state, the first extension plate is at least partially accommodated in the first groove.

[0013] In the above scheme, since the first extension plate is at least partially accommodated in the first groove in the folded state, the overall thickness of the fire protection device is smaller in the folded state, which helps to reduce the space occupied by the fire protection device during transportation and thus improves its transportation convenience.

[0014] In one or more embodiments of the first aspect, the fireproof device further includes a first elastic element, which connects the first extension plate and the main body and is used to drive the first extension plate to unfold.

[0015] In the above scheme, the fire protection device can be automatically unfolded from the folded state by the first elastic element without the need for additional driving force, which helps to reduce the overall space occupied by the fire protection device, and at the same time helps to make the first extension plate have high operational stability and reliability.

[0016] In one or more embodiments of the first aspect, the fireproof device further includes a second extension plate, which is rotatably connected to the other end of the main body in the first direction; in the folded state, the second extension plate and the main body are stacked along the height direction, and in the unfolded state, the first extension plate, the main body and the second extension plate are arranged along the first direction.

[0017] In the above scheme, the second extension plate can further increase the shielding area of ​​the fire protection device, which can shield a larger area of ​​high-temperature smoke, thereby further reducing the risk of the first compartment catching fire due to the spread of fire in the second compartment, and effectively improving the reliability of the entire energy storage system.

[0018] In one or more embodiments of the first aspect, a second groove is provided on one side of the body in the thickness direction, and in the folded state, the second extension plate is at least partially accommodated in the second groove.

[0019] In the above scheme, since the second extension plate is at least partially accommodated in the second groove in the folded state, the overall thickness of the fire protection device is smaller in the folded state, which helps to reduce the space occupied by the fire protection device during transportation and thus improves its transportation convenience.

[0020] In one or more embodiments of the first aspect, the fireproof device further includes a second elastic member, which connects the second extension plate and the main body and is used to drive the second extension plate to unfold.

[0021] In the above scheme, the fire protection device can be automatically unfolded from the folded state by the second elastic element without the need for additional driving force, which helps to reduce the overall space occupied by the fire protection device, and at the same time helps to make the second extension plate have higher operational stability and reliability.

[0022] In one or more embodiments of the first aspect, the energy storage system further includes at least two connectors spaced apart along a first direction, with the connectors located between a first compartment and a second compartment along the height direction, and an opening for a fire-resistant device to extend between two adjacent connectors; in the folded state, the size of the fire-resistant device is smaller than the size of the opening along the first direction; in the unfolded state, the size of the fire-resistant device is larger than the size of the opening along the first direction.

[0023] In the above solution, the connector can improve the connection stability between the first and second compartments. In the folded state, the size of the fire-resistant device along the first direction is smaller than the size of the opening; in the unfolded state, the size of the fire-resistant device along the first direction is larger than the size of the opening. In both the folded and unfolded states, the fire-resistant device will not interfere with the connector, and in the unfolded state, the fire-resistant device also has a larger shielding area.

[0024] In one or more embodiments of the first aspect, the number of connectors is two, with the two connectors located at two corners of the top wall of the second compartment; or, the number of connectors is three, with two connectors located at two corners of the top wall of the second compartment and the other connector located between the two connectors.

[0025] In the above scheme, the two connectors are located at the two corners of the top wall of the second compartment, which can provide a large space for the eaves in the first direction and make the eaves have a large covering area.

[0026] There are three connectors, two of which are located at the two corners of the top wall of the second compartment, and the third connector is located between the two connectors. This allows the first and second compartments to have high connection stability while the eaves have a large covering area.

[0027] In one or more embodiments of the first aspect, in the deployed state, the fireproof device protrudes from the outer side of the second compartment along the first direction.

[0028] In the above scheme, since the fireproof device protrudes from the outer side of the second compartment along the first direction when it is in the deployed state, the fireproof device can block most of the high-temperature smoke after it overflows from the periphery of the second compartment, further reducing the risk of the first compartment catching fire due to the spread of fire in the second compartment, and effectively improving the reliability of the entire energy storage system.

[0029] In one or more embodiments of the first aspect, the energy storage system further includes an isolator located between the first compartment and the second compartment along the height direction; a first end is rotatably connected to the isolator.

[0030] In the above scheme, firstly, since the first end is rotatably connected to the isolator, during the synchronous transportation of the isolator and the fireproof device, the fireproof device can be rotated to share some space with the isolator, reducing the space occupied by the fireproof device and the isolator during transportation, improving the transportation convenience of the energy storage system, and reducing transportation costs. Secondly, the assembly of the fireproof device does not require coordination with the first or second compartment, which reduces the risk of stress concentration at the connection point caused by the coordination of the fireproof device with the first or second compartment, leading to structural failure of the first or second compartment, and is conducive to giving the energy storage system higher structural stability. Furthermore, the fireproof device can be replaced independently of the first and second compartments, which helps to reduce the maintenance costs of the energy storage system.

[0031] In one or more embodiments of the first aspect, the insulating member includes a first thermal insulation layer.

[0032] In the above scheme, the setting of the first insulation layer can increase the difficulty of heat transfer between the first and second compartments, thereby further reducing the risk of thermal runaway propagation and further improving the reliability of the energy storage system.

[0033] In one or more embodiments of the first aspect, the first insulation layer includes at least one of glass wool, rock wool, polyurethane foam board, phenolic foam board, ceramic fiber board, vacuum insulation board, and aerogel component.

[0034] In one or more embodiments of the first aspect, the isolation member further includes a frame, a first isolation plate and a second isolation plate, both of which are connected to the frame, and a first heat insulation layer is located between the first isolation plate and the second isolation plate along the thickness direction of the isolation member.

[0035] In the above scheme, the setting of the first isolation plate and the second isolation plate can provide good protection for the first heat insulation layer, reducing the risk of the first heat insulation layer being scratched by foreign objects or damaged during transportation, which would lead to the failure of its heat insulation performance.

[0036] In one or more embodiments of the first aspect, a fire-retardant coating is provided on the surface of the fire-resistant device facing away from the first compartment in the height direction.

[0037] In the above scheme, the application of fire-retardant coating can reduce the risk of fire-retardant devices being burned through or damaged and thus failing.

[0038] In one or more embodiments of the first aspect, the fire-retardant coating includes a one-component intumescent thin-film aqueous acrylic coating or an intumescent two-component epoxy coating.

[0039] In one or more embodiments of the first aspect, the fire protection device includes a second heat insulation layer.

[0040] In the above scheme, the installation of a second insulation layer can reduce the risk of fire protection devices failing due to high temperatures.

[0041] In one or more embodiments of the first aspect, the second insulation layer includes at least one of glass wool, rock wool, polyurethane foam board, phenolic foam board, ceramic fiber board, vacuum insulation board, and aerogel component.

[0042] In one or more embodiments of the first aspect, the second compartment has a battery compartment, in which a battery device located within the second compartment is housed; the second compartment also includes a battery compartment door, and a fireproof device protrudes from the side of the second compartment where the battery compartment door is located.

[0043] In the above scheme, since the fireproof device protrudes from the side of the second compartment where the battery compartment door is located, it can reduce the risk of flames overflowing from the door gap spreading to the first compartment and causing the first compartment to burn, which can further improve the reliability of the energy storage system.

[0044] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0045] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0046] Figure 1 This is a schematic diagram of the structure of an energy storage system according to some embodiments of this application;

[0047] Figure 2 This is a schematic diagram of the energy storage system according to other embodiments of this application;

[0048] Figure 3 This is a schematic diagram of a partial structure of an energy storage system according to some embodiments of this application;

[0049] Figure 4 This is a schematic diagram of the energy storage system according to some embodiments of this application, showing its unfolded state;

[0050] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0051] Figure 6 This is a schematic diagram of the energy storage system according to some embodiments of this application, showing its unfolded state;

[0052] Figure 7 for Figure 6 A magnified view of a section at point B in the middle;

[0053] Figure 8 This is a schematic diagram of the structure of a fire protection device according to some embodiments of this application;

[0054] Figure 9 This is a schematic diagram of the structure of an energy storage system according to some embodiments of this application;

[0055] Figure 10 This is a schematic diagram of a partial structure of an energy storage system according to some embodiments of this application.

[0056] The reference numerals in the detailed embodiments are as follows:

[0057] 1000 - Energy storage system; 100 - Battery device; 201 - First compartment; 202 - Second compartment; 2021 - Battery compartment door; 300 - Fireproof device; 301 - First end; 302 - Second end; 303 - Lifting point; 304 - Main body; 3041 - First groove; 305 - First extension plate; 307 - First elastic element; 309 - Second extension plate; 310 - Second groove; 312 - Second elastic element; 500 - Connector; 600 - Corner piece; 700 - Isolator; 702 - First heat insulation layer; 703 - Frame; 704 - First isolation plate; 705 - Second isolation plate; X - Second direction; Y - First direction; Z - Height direction. Detailed Implementation

[0058] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0060] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0061] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0062] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0063] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0064] Battery cells include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0065] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, reduces the risk of short circuits while allowing active ions to pass through.

[0066] In some embodiments, the isolation component is an isolation membrane. The isolation membrane can be any known porous structure isolation membrane with good chemical and mechanical stability.

[0067] In some embodiments, the isolation component is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0068] In some embodiments, the electrode assembly is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0069] In some implementations, the electrode assembly is a stacked structure.

[0070] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0071] As an example, a battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells, such as hexagonal prismatic battery cells.

[0072] The battery mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity.

[0073] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0074] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0075] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0076] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing by fixing the battery module in the housing.

[0077] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0078] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0079] In some embodiments, the energy storage device includes a battery. The energy storage device may also include an energy storage container, an energy storage cabinet, etc.

[0080] In a typical battery cell structure, a battery cell includes a casing, electrode assemblies, and electrolyte. The casing includes end caps and a housing; the end caps close the opening of the housing to define a space for accommodating the electrode assemblies. In some embodiments, the casing can be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc.

[0081] Energy storage systems can include energy storage power stations, wind power systems, solar power systems, mobile power systems, or temporary power supply systems. Energy storage power stations store electrical energy during off-peak hours and provide power to users or electrical equipment during peak hours. Wind power systems collect wind energy from wind turbines, convert it into electricity, and then store it in an energy storage system. Solar power systems convert solar energy into electricity, store it in an energy storage system, and supply it to users as needed. Mobile power systems can power equipment in areas inaccessible by the mains grid, such as remote mountainous areas and isolated wilderness areas. Temporary power supply systems can provide power to users when there is insufficient electricity.

[0082] In energy storage systems where containers are stacked vertically, if a battery device in a lower container experiences thermal runaway, the resulting high-temperature smoke or flames will spread upwards, potentially triggering a chain reaction of thermal runaway in the battery devices in upper containers. This fire propagation can escalate the fire into an uncontrollable state, resulting in poor reliability of the aforementioned energy storage system.

[0083] In view of this, this application provides an energy storage system, which includes multiple battery devices, a first compartment and a second compartment, and a fire prevention device. The first and second compartments each house multiple battery devices and are stacked along their height, with the first compartment located above the second compartment. The fire prevention device has a first end and a second end disposed opposite to each other. The first end is rotatably connected to the bottom of the first compartment or the top of the second compartment, and the second end is a free end. The fire prevention device protrudes from the outer periphery of the second compartment. On the one hand, when a battery device in the second compartment experiences thermal runaway, the fire prevention device protruding from the outer periphery of the second compartment can prevent the high temperature generated in the second compartment and the flame from spreading along the height direction to the first compartment, thereby reducing the risk of the first compartment catching fire due to the spread of fire from the second compartment, reducing the risk of fire escalation, and effectively improving the reliability of the entire energy storage system.

[0084] According to some embodiments of this application, please refer to Figures 1-3 This application provides an energy storage system 1000, which includes multiple battery devices 100, a first compartment 201 and a second compartment 202, and a fireproof device 300. The first compartment 201 and the second compartment 202 each house multiple battery devices 100. The first compartment 201 and the second compartment 202 are stacked along the height direction Z, with the first compartment 201 located above the second compartment 202. The fireproof device 300 has a first end 301 and a second end 302 disposed opposite to each other. The first end 301 is rotatably connected to the bottom of the first compartment 201 or the top of the second compartment 202, and the second end 302 is a free end. The fireproof device 300 protrudes from the outer periphery of the second compartment 202.

[0085] In some embodiments, the fire protection device 300 may be a fire shield.

[0086] In some embodiments, the battery device 100 may include a plurality of battery cells. The battery device 100 may also include a housing, the interior of which is hollow, and the plurality of battery cells are housed within the housing. These are referred to herein as a first housing and a second housing, respectively, and are fastened together. The shapes of the first housing and the second housing can be determined according to the shape of the combination of the plurality of battery cells, and both the first housing and the second housing may have an open surface. For example, both the first housing and the second housing may be hollow cuboids, each with only one open surface. The open surfaces of the first housing and the second housing are arranged opposite to each other, and the first housing and the second housing are fastened together to form a housing with a closed cavity. The plurality of battery cells are connected in parallel, series, or mixed configurations and placed within the housing formed by the fastening of the first housing and the second housing.

[0087] In some embodiments, the battery device 100 may include a pressure relief mechanism, which may be disposed on any wall of the first housing or the second housing. In the event of thermal runaway of a single battery cell within the battery device 100, the pressure relief mechanism allows the thermal runaway emissions to be discharged from the battery device 100's housing. Emissions from the battery device 100 mentioned in this application include, but are not limited to: electrolyte, dissolved or broken positive and negative electrode plates, fragments of the separator, high-temperature and high-pressure gases generated during the reaction, flames, etc.

[0088] In some embodiments, the energy storage system 1000 includes a first battery monitoring circuit and a second battery monitoring circuit. The first battery monitoring circuit is used to collect first data from battery devices 100 located in a first compartment 201, and the second battery monitoring circuit is used to collect second data from battery devices 100 located in a second compartment 202. A control module is used to determine the operating status data of the energy storage system 1000. The operating status data of the energy storage system 1000 is associated with the first and second data. The energy storage system 1000 may include a control module for electrically controlling each battery device 100; one of the first compartment 201 and the second compartment 202 houses the control module. The control module may be a module in the energy storage system 1000 used for monitoring and managing the battery devices 100, and it may serve as a management unit for the battery devices 100 in the energy storage system 1000. The control module may be communicatively connected to the first and second battery monitoring circuits, and it is capable of receiving and processing information from the first and second battery monitoring circuits to determine the operating status data of the energy storage system 1000 using the information from the first and second battery monitoring circuits. The control module can monitor information such as current, voltage, power, state of charge, or temperature of the battery device 100 to determine the operating status data of the energy storage system 1000. As an example, the control module includes modules such as an insulation monitoring module (Imm), a master battery management unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0089] In some embodiments, the dimensions of the first storage body 201 along the length direction, the width direction, and the height direction Z may or may not be equal to the dimensions of a standard container along the length direction, the width direction, and the height direction Z. Similarly, the dimensions of the second storage body 202 along the length direction, the width direction, and the height direction Z may or may not be equal to the dimensions of a standard container along the length direction, the width direction, and the height direction Z.

[0090] A standard container can refer to a container of standard dimensions used in transportation, such as 20 feet, 30 feet, 40 feet, or 45 feet. These dimensions conform to the corresponding standards, with specific length, width, and height measurements. Standard containers can be referenced in GB / T1413-2023 Series 1: Container Classification, Dimensions, and Rated Mass.

[0091] A 20-foot container can include: a length dimension of 6058mm with a tolerance of 0mm-6mm; a width dimension of 2438mm with a tolerance of 0mm-5mm; and a height dimension (Z) of 2896mm, 2591mm, or no greater than 2438mm with a tolerance of 0mm-5mm. Note that dimensions smaller than the standard container's height dimension (Z) can be understood as being less than 2896mm.

[0092] A 30-foot container can include: a length dimension of 9125mm with a tolerance of 0mm-10mm; a width dimension of 2438mm with a tolerance of 0mm-5mm; and a height dimension (Z) of 2896mm, 2591mm, or no greater than 2438mm with a tolerance of 0mm-5mm. Note that dimensions smaller than the standard container's height dimension (Z) can be understood as being less than 2896mm.

[0093] A 40-foot container can include: a length dimension of 12192mm with a tolerance of 0mm-10mm; a width dimension of 2438mm with a tolerance of 0mm-5mm; and a height dimension (Z) of 2896mm, 2591mm, or no greater than 2438mm with a tolerance of 0mm-5mm. Note that dimensions smaller than the standard container's height dimension (Z) can be understood as being less than 2896mm.

[0094] A 45-foot container can include: a length dimension of 13716mm with a tolerance of 0mm-10mm; a width dimension of 2438mm with a tolerance of 0mm-5mm; and a height dimension (Z) of 2591mm or 2896mm with a tolerance of 0mm-5mm. Note that a dimension smaller than the standard container's height dimension (Z) can be understood as being smaller than 2896mm.

[0095] Alternatively, for containers of various sizes, dimensions within ±5% of their dimensions can be considered as dimensions within tolerance.

[0096] In some embodiments, the height direction Z is parallel to the direction of gravity; in other words, the height direction Z is approximately parallel to the direction of gravity.

[0097] The first end 301 is rotatably connected to the bottom of the first compartment 201 or the top of the second compartment 202, and the second end 302 is a free end. This can be understood as the connection point of the first end 301 of the fireproof device 300 being located between the first compartment 201 and the second compartment 202 along the height direction Z. Optionally, the first end 301 is rotatably connected to the top wall of the second compartment 202. Optionally, the first end 301 is rotatably connected to the bottom wall of the first compartment 201. Optionally, the energy storage system 1000 also includes an isolator 700, located between the first compartment 201 and the second compartment 202 along the height direction Z. The first end 301 is rotatably connected to the isolator 700. This configuration can be understood as the first end 301 being rotatably connected to either the bottom of the first compartment 201 or the top of the second compartment 202.

[0098] In the technical solution of this application embodiment, on the one hand, when the battery device 100 in the second compartment 202 experiences thermal runaway, the fireproof device 300 protruding from the outer periphery of the second compartment 202 can block the high temperature generated in the second compartment 202 and the flame from spreading along the height direction Z to the first compartment 201, thereby reducing the risk of the first compartment 201 catching fire due to the spread of fire in the second compartment 202, reducing the risk of fire aggravation, and effectively improving the reliability of the entire energy storage system 1000.

[0099] According to some embodiments of this application, please refer to Figures 1-3 The fire protection device 300 is set at an angle, and the height of the second end 302 is lower than the height of the first end 301.

[0100] The fire-resistant device 300 can be flat. Alternatively, the fire-resistant device 300 can also include multiple eaves connected in sequence, with at least one eave being curved.

[0101] In some embodiments, the fire protection device 300 is inclined and the height of the second end 302 is lower than the height of the first end 301, which can be understood as... Figure 3 The free end of the fire protection device 300 is tilted downwards.

[0102] In the above scheme, since the fire prevention device 300 is set at an angle and the height of the second end 302 is lower than that of the first end 301, the path of the high-temperature flue gas climbing upward along the height direction Z is longer, and the power required for the high-temperature flue gas to climb upward along the height direction Z is increased. At the same time, it is conducive to forming a local vortex to reduce the mixing efficiency of the high-temperature flue gas and oxygen. In this way, the risk of the first compartment 201 catching fire due to the spread of fire in the second compartment 202 igniting the first compartment 201 is further reduced, and the reliability of the entire energy storage system 1000 is further improved.

[0103] According to some embodiments of this application, please refer to Figures 1-3 The second end 302 is provided with a lifting point 303.

[0104] The lifting point 303 at the free end of the fireproof device 300 can be adapted to the spreader used for lifting standard containers.

[0105] In some embodiments, the lifting point 303 is disposed on the body 304.

[0106] In the above scheme, since the free end of the fire protection device 300 is provided with a lifting point 303, it is convenient for the mechanized hoisting of the fire protection device 300, which is conducive to improving the installation convenience of the energy storage system 1000.

[0107] According to some embodiments of this application, please refer to Figures 4-5 The fire protection device 300 includes a main body 304 and a first extension plate 305. The first extension plate 305 is rotatably connected to one end of the main body 304 in the first direction Y. The second direction X, the first direction Y and the height direction Z are perpendicular to each other. The fire protection device 300 has a folded state and an unfolded state. In the folded state, the first extension plate 305 and the main body 304 are stacked along the height direction Z. In the unfolded state, the first extension plate 305 and the main body 304 are arranged along the first direction Y.

[0108] In some embodiments, the dimension of the first extension plate 305 along the second direction X is smaller than the dimension of the body 304.

[0109] In some embodiments, the body 304 and the first extension plate 305 are made of the same material.

[0110] In some embodiments, the first extension plate 305 may be rotatably connected to the body 304 via a hinge.

[0111] In some embodiments, the first extension plate 305 can be rotatably connected to the body 304 via a shaft.

[0112] In some embodiments, the fireproof device 300 can be switched from a folded state to an unfolded state by a rotary motor. For example, the motor 402 drives a shaft fixedly connected to the first extension plate 305 to rotate, causing the first extension plate 305 to rotate relative to the main body 304. Optionally, the main body 304 may be provided with a support member that provides support force to the first extension plate 305 in the unfolded state.

[0113] In the above scheme, the first extension plate 305 can increase the shielding area of ​​the fire protection device 300, which can shield a larger range of high-temperature smoke, thereby further reducing the risk of the first compartment 201 catching fire due to the spread of fire in the second compartment 202 igniting the first compartment 201, and effectively improving the reliability of the entire energy storage system 1000.

[0114] According to some embodiments of this application, please refer to Figures 4-5 A first groove 3041 is provided on one side of the main body 304 in the thickness direction. In the folded state, the first extension plate 305 is at least partially accommodated in the first groove 3041.

[0115] In some embodiments, the fireproof device 300 is a plate, and the first groove 3041 can be a groove formed on its surface in the thickness direction.

[0116] In some embodiments, the fireproof device 300 may include a main support, a first shielding member, a second shielding member, and a filler, wherein both the first and second shielding members are connected to the main support, and the filler is disposed between the first and second shielding members. In other embodiments, the first groove 3041 may be a recess formed on the surface of the first shielding member facing away from the filler or on the surface of the second shielding member facing away from the filler.

[0117] In the above scheme, since the first extension plate 305 is at least partially accommodated in the first groove 3041 in the folded state, the overall thickness of the fire protection device 300 in the folded state is small, which helps to reduce the space occupied by the fire protection device 300 during transportation and thus improves its transportation convenience.

[0118] According to some embodiments of this application, please refer to Figures 4-5 The fireproof device 300 also includes a first elastic element 307, which connects the first extension plate 305 and the main body 304 and is used to drive the first extension plate 305 to unfold.

[0119] In some embodiments, the first elastic element 307 is a torsion spring, one end of which is connected to the main body 304 and the other end is connected to the first extension plate 305.

[0120] In the above scheme, the fire protection device 300 can be automatically unfolded from the folded state by the first elastic element 307 without the need for additional driving force, which helps to reduce the overall space occupied by the fire protection device 300, and at the same time helps to make the first extension plate 305 have higher operational stability and reliability.

[0121] According to some embodiments of this application, please refer to Figures 6-7 The fireproof device 300 also includes a second extension plate 309, which is rotatably connected to the other end of the main body 304 in the first direction Y. In the folded state, the second extension plate 309 and the main body 304 are stacked along the height direction Z. In the unfolded state, the first extension plate 305, the main body 304 and the second extension plate 309 are arranged along the first direction Y.

[0122] In some embodiments, the dimension of the second extension plate 309 along the second direction X is smaller than the dimension of the body 304.

[0123] In some embodiments, the main body 304 and the second extension plate 309 are made of the same material.

[0124] In some embodiments, the second extension plate 309 may be rotatably connected to the body 304 via a hinge.

[0125] In some embodiments, the second extension plate 309 can be rotatably connected to the body 304 via a shaft.

[0126] In some embodiments, the fireproof device 300 can be switched from a folded state to an unfolded state by a rotary motor. For example, the motor 402 drives a shaft fixedly connected to the second extension plate 309 to rotate, causing the second extension plate 309 to rotate relative to the main body 304. Optionally, the main body 304 may be provided with a support member that provides support for the second extension plate 309 in the unfolded state.

[0127] In the above scheme, the second extension plate 309 can further increase the shielding area of ​​the fire protection device 300, which can shield a larger range of high-temperature smoke, thereby further reducing the risk of the first compartment 201 catching fire due to the spread of fire in the second compartment 202 igniting the first compartment 201, and effectively improving the reliability of the entire energy storage system 1000.

[0128] According to some embodiments of this application, please refer to Figures 6-7 A second groove 310 is provided on one side of the main body 304 in the thickness direction. In the folded state, the second extension plate 309 is at least partially accommodated in the second groove 310.

[0129] In some embodiments, the fireproof device 300 is a plate, and the second groove 310 can be a groove formed on its surface in the thickness direction.

[0130] In some embodiments, the fire protection device 300 may include a main support, a third shielding member, a fourth shielding member, and a filler, wherein the third shielding member and the fourth shielding member are both connected to the main support, and the filler is disposed between the third shielding member and the fourth shielding member. In other embodiments, the second groove 310 may be a recess formed on the surface of the third shielding member facing away from the filler or on the surface of the fourth shielding member facing away from the filler.

[0131] In the above scheme, since the second extension plate 309 is at least partially accommodated in the second groove 310 in the folded state, the overall thickness of the fire protection device 300 in the folded state is small, which helps to reduce the space occupied by the fire protection device 300 during transportation and thus improves its transportation convenience.

[0132] According to some embodiments of this application, please refer to Figures 6-7The fire protection device 300 also includes a second elastic element 312, which connects the second extension plate 309 and the main body 304 and is used to drive the second extension plate 309 to unfold.

[0133] In some embodiments, the second elastic element 312 is a torsion spring, one end of which is connected to the main body 304 and the other end is connected to the second extension plate 309.

[0134] In the above scheme, the fire protection device 300 can be automatically unfolded from the folded state by the second elastic element 312 without the need for additional driving force, which helps to reduce the overall space occupied by the fire protection device 300, and at the same time helps to make the second extension plate 309 have higher operational stability and reliability.

[0135] According to some embodiments of this application, please refer to Figures 2-10 The energy storage system 1000 also includes at least two connectors 500 spaced apart along the first direction Y. Along the height direction Z, the connectors 500 are located between the first compartment 201 and the second compartment 202, and an opening for the fire protection device 300 to extend is formed between two adjacent connectors 500. In the folded state, along the first direction Y, the size of the fire protection device 300 is smaller than the size of the opening. In the unfolded state, along the first direction Y, the size of the fire protection device 300 is larger than the size of the opening.

[0136] In some embodiments, the connector 500 is located between the first compartment 201 and the second compartment 202 along the height direction Z.

[0137] The connector 500 can be understood as a connector 500 that fixes the corner piece 600 of the first compartment 201 and the corner piece 600 of the second compartment 202. It can also be understood as a connector 500 disposed along the height direction Z between the first compartment 201 and the second compartment 202, connecting the first compartment 201 and the second compartment 202. The connector 500 can mate with the corner piece 600. It can also not mate with the corner piece 600, for example, it can be in the form of a beam.

[0138] In some embodiments, the energy storage system 1000 further includes an isolator 700 located between a first compartment 201 and a second compartment 202 along the height direction Z. A first end 301 is rotatably connected to the isolator 700. A connector 500 may include a first connector and a second connector. The first connector connects the isolator 700 and the first compartment 201, and the second connector connects the isolator 700 and the second compartment 202. Optionally, please refer to... Figure 10The fire-resistant device 300 and the isolator 700 are stacked along the height direction Z, and the thickness of the fire-resistant device 300 is less than the height of the connector 500 protruding from the isolator 700 along the height direction Z. With this arrangement, when the connector 500 and the isolator 700 are transported together in the same package, the fire-resistant device 300 will not occupy additional space in the height direction Z, which helps to improve the transportation convenience of the energy storage system 1000.

[0139] In the folded state, along the first direction Y, the size of the fireproof device 300 is smaller than the size of the opening; in the unfolded state, along the first direction Y, the size of the fireproof device 300 is larger than the size of the opening. This means that although the presence of the connector 500 may prevent the area on one side of the second compartment 202 from being completely covered by the fireproof device 300 due to the risk of interference with the connector 500, the unfolding of the first extension plate 305 and the second extension plate 309 can increase the coverage area without interfering with the connector 500.

[0140] In the above solution, the connector 500 can improve the connection stability between the first compartment 201 and the second compartment 202. In the folded state, the size of the fireproof device 300 along the first direction Y is smaller than the size of the opening; in the unfolded state, the size of the fireproof device 300 along the first direction Y is larger than the size of the opening. In both the folded and unfolded states, the fireproof device 300 will not interfere with the connector 500, and in the unfolded state, the fireproof device 300 also has a larger shielding area.

[0141] According to some embodiments of this application, please refer to Figures 2-10 There are two connectors 500, with the two connectors 500 located at the two corners of the top wall of the second compartment 202; or, there are three connectors 500, with two connectors 500 located at the two corners of the top wall of the second compartment 202, and the other connector 500 located between the two connectors 500.

[0142] In some embodiments, please refer to Figure 2 , Figure 4 and Figure 5 There are two connectors 500, located at two corners of the top wall of the second compartment 202, and each connector 500 is connected to a corner piece 600. In other embodiments, please refer to... Figure 4 In the unfolded state, the maximum distance between the first extension plate 305 and the second extension plate 309 along the first direction Y is greater than the maximum distance between the two connectors 500 along the first direction Y.

[0143] In some embodiments, please refer to Figures 6-9There are three connectors 500, two of which are located at the two corners of the top wall of the second compartment 202, and the third connector 500 is located between the two corner connectors 600. The corner connectors 500 are connected to the two corner pieces 600. The middle connector 500 is directly connected to both the first compartment 201 and the second compartment 202. In other embodiments, please refer to... Figure 6 and Figure 7 In the unfolded state, the second extension plate 309 protrudes along the first direction Y from the inner side of the intermediate connector 500. Optionally, in the unfolded state, two adjacent second extension plates 309 are adjacent and in contact. In the unfolded state, the maximum distance between the two first extension plates 305 along the first direction Y is greater than the maximum distance between the two corner connectors 500 along the first direction Y.

[0144] In the above scheme, the two connectors 500 are located at the two corners of the top wall of the second compartment 202, which can provide a larger space for the eaves in the first direction Y and make the eaves have a larger covering area.

[0145] According to some embodiments of this application, please refer to Figures 2-10 In the unfolded state, the fireproof device 300 protrudes from the outer side of the second compartment 202 along the first direction Y.

[0146] In some embodiments, the second compartment 202 has a first wall and a second wall disposed opposite to each other along the first direction Y, and the fire protection device 300 protrudes from the outer surface of the second compartment 202 along the first direction Y. It can be understood that the fire protection device 300 protrudes from the surfaces of the first wall and the second wall that are opposite to each other.

[0147] In the above scheme, since the fireproof device 300 protrudes from the outer side of the second compartment 202 along the first direction Y when it is in the deployed state, the fireproof device 300 can block most of the high-temperature smoke after it overflows from the periphery of the second compartment 202, further reducing the risk of the first compartment 201 catching fire due to the spread of fire in the second compartment 202, and effectively improving the reliability of the entire energy storage system 1000.

[0148] According to some embodiments of this application, please refer to Figures 2-10 The energy storage system 1000 also includes an isolator 700, which is located between the first compartment 201 and the second compartment 202 along the height direction Z; the first end 301 is rotatably connected to the isolator 700.

[0149] In some embodiments, the fire protection device 300 may be hinged to the isolation member 700.

[0150] In the above solution, on the one hand, since the first end 301 is rotatably connected to the isolation member 700, during the simultaneous transportation of the isolation member 700 and the fire protection device 300, rotating the fire protection device 300 allows the fire protection device 300 to share part of the space with the isolation member 700, which reduces the space occupied by the fire protection device 300 and the isolation member 700 during transportation, improves the transportation convenience of the energy storage system 1000, and reduces transportation costs. On the other hand, the assembly of the fire protection device 300 does not require cooperation with the first bin 201 or the second bin 202, which can reduce the risk of structural failure of the first bin 201 or the second bin 202 caused by stress concentration at the connection position due to the cooperation between the fire protection device 300 and the first bin 201 or the second bin 202, and helps the energy storage system 1000 to have high structural stability. In another aspect, the fire protection device 300 can be replaced independently of the first bin 201 and the second bin 202, which helps reduce the maintenance cost of the energy storage system 1000.

[0151] According to some embodiments of the present application, please refer to Figures 2-10 , the isolation member 700 includes a first heat insulation layer 702.

[0152] In some embodiments, the isolation member 700 is a plate, and the first heat insulation layer 702 directly forms the isolation member 700.

[0153] In the above solution, the arrangement of the first heat insulation layer 702 can increase the difficulty of heat transfer between the first bin 201 and the second bin 202, thereby further reducing the risk of thermal runaway spread and further improving the reliability of the energy storage system 1000.

[0154] According to some embodiments of the present application, the first heat insulation layer 702 includes at least one of glass wool, rock wool, polyurethane foam board, phenolic foam board, ceramic fiber board, vacuum insulation panel, and aerogel member.

[0155] According to some embodiments of the present application, please refer to Figure 10 , the isolation member 700 further includes a frame 703, a first isolation plate 704 and a second isolation plate 705, both the first isolation plate 704 and the second isolation plate 705 are connected to the frame 703, and along the thickness direction of the isolation member 700, the first heat insulation layer 702 is located between the first isolation plate 704 and the second isolation plate 705.

[0156] In some embodiments, the frame 703 may be in a Japanese-shaped, square-shaped, or tic-tac-toe-shaped structure, etc.

[0157] In some embodiments, the first isolation plate 704 and the second isolation plate 705 may be referred to as a first skin and a second skin.

[0158] In the above scheme, the setting of the first isolation plate 704 and the second isolation plate 705 can provide good protection for the first heat insulation layer 702, reducing the risk of the first heat insulation layer 702 being scratched by foreign objects or damaged during transportation, which would lead to the failure of its heat insulation performance.

[0159] According to some embodiments of this application, please refer to Figure 3 In the height direction Z, the fireproof device 300 has a fireproof coating on the surface opposite to the first compartment 201.

[0160] Along the vertical direction Z, the surface of the fire protection device 300 facing the second compartment 202 is provided with a fire-retardant coating. This can be understood as the fire-facing surface of the fire protection device 300 being provided with a fire-retardant coating.

[0161] In the above scheme, the application of fire-retardant coating can reduce the risk of the fire protection device 300 being burned through or damaged and thus failing.

[0162] According to some embodiments of this application, the fire-retardant coating includes a one-component intumescent thin-film waterborne acrylic coating or an intumescent two-component epoxy coating.

[0163] According to some embodiments of this application, the fire protection device 300 includes a second heat insulation layer.

[0164] In some embodiments, the fire protection device 300 is a plate, and the second heat insulation layer can be directly formed into a plate as the fire protection device 300.

[0165] In some embodiments, the second insulation layer may serve as the aforementioned filler.

[0166] In the above solution, the installation of a second insulation layer can reduce the risk of the fire protection device 300 failing due to high temperature.

[0167] According to some embodiments of this application, the second insulation layer includes at least one of glass wool, rock wool, polyurethane foam board, phenolic foam board, ceramic fiber board, vacuum insulation board, and aerogel component.

[0168] According to some embodiments of this application, please refer to Figure 2 and Figure 9 The second compartment 202 has a battery compartment, in which a battery device 100 located within the second compartment 202 is housed; the second compartment 202 also includes a battery compartment door 2021, and a fireproof device 300 protrudes from the side of the second compartment 202 where the battery compartment door 2021 is located.

[0169] In the above scheme, since the fire prevention device 300 protrudes from the side of the second compartment 202 where the battery compartment door 2021 is provided, it can reduce the risk of flames overflowing from the door gap spreading to the first compartment 201 and causing the first compartment 201 to burn, and can further improve the reliability of the energy storage system 1000.

[0170] According to some embodiments of this application, please refer to Figures 6-10 This application provides an energy storage system 1000, which includes a plurality of battery devices 100, an isolation component 700, a first compartment 201 and a second compartment 202, and a fireproof device 300. The first compartment 201 and the second compartment 202 each contain a plurality of battery devices 100. The first compartment 201 and the second compartment 202 are stacked along the height direction Z, with the first compartment 201 located above the second compartment 202.

[0171] The fire-resistant device 300 has a first end 301 and a second end 302 disposed opposite to each other, and an isolating member 700 is located between the first compartment 201 and the second compartment 202; the first end 301 is rotatably connected to the isolating member 700. The second end 302 is a free end, and the fire-resistant device 300 protrudes from the outer periphery of the second compartment 202. The fire-resistant device 300 is inclined, and the height of the second end 302 is lower than the height of the first end 301. The second end 302 is provided with a lifting point 303.

[0172] The fire-resistant device 300 includes a main body 304 and a first extension plate 305. The first extension plate 305 is rotatably connected to one end of the main body 304 in a first direction Y. The second direction X, the first direction Y, and the height direction Z are perpendicular to each other. The fire-resistant device 300 has a folded state and an unfolded state. In the folded state, the first extension plate 305 and the main body 304 are stacked along the height direction Z. In the unfolded state, the first extension plate 305 and the main body 304 are arranged along the first direction Y. The fire-resistant device 300 also includes a first elastic element 307, which connects the first extension plate 305 and the main body 304 and is used to drive the first extension plate 305 to unfold. The fireproof device 300 also includes a second extension plate 309, which is rotatably connected to the other end of the main body 304 in the first direction Y. In the folded state, the second extension plate 309 and the main body 304 are stacked along the height direction Z. In the unfolded state, the first extension plate 305, the main body 304, and the second extension plate 309 are arranged along the first direction Y. The fireproof device 300 also includes a second elastic member 312, which connects the second extension plate 309 and the main body 304 and is used to drive the second extension plate 309 to unfold. The energy storage system 1000 also includes three connectors 500 spaced apart along the first direction Y. Along the height direction Z, the connectors 500 are located between the first compartment 201 and the second compartment 202, and an opening is formed between two adjacent connectors 500 for the fireproof device 300 to extend out. In the folded state, along the first direction Y, the size of the fireproof device 300 is smaller than the size of the opening. In the unfolded state, along the first direction Y, the size of the fireproof device 300 is larger than the size of the opening. Two connectors 500 are located at the two corners of the top wall of the second compartment 202, and another connector 500 is located between the two connectors 500. In the deployed state, the fireproof device 300 protrudes from the outer surface of the second compartment 202 along the first direction Y.

[0173] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An energy storage system, characterized by, The energy storage system comprises: a plurality of battery devices; a first storage body and a second storage body, each of which contains a plurality of the battery devices, the first storage body and the second storage body being stacked along a height direction, the first storage body being located above the second storage body; a fireproof device having a first end and a second end arranged oppositely, the first end being rotatably connected to a bottom of the first storage body or a top of the second storage body, the second end being a free end, the fireproof device protruding outward from a periphery of the second storage body.

2. The energy storage system of claim 1, wherein, The fireproof device is arranged obliquely, and a height of the second end is lower than that of the first end.

3. The energy storage system of claim 2, wherein, The second end is provided with a lifting point.

4. The energy storage system of claim 1, wherein, The fireproof device comprises a main body and a first extension plate, the first extension plate being rotatably connected to one end of the main body in a first direction intersecting the height direction; The fireproof device has a folded state and an unfolded state, in the folded state, the first extension plate and the main body are stacked along the height direction, in the unfolded state, the first extension plate, the main body and a second extension plate are arranged along the first direction.

5. The energy storage system of claim 4, wherein, One side of the main body in a thickness direction is provided with a first groove, in the folded state, the first extension plate is at least partially accommodated in the first groove.

6. The energy storage system of claim 4, wherein, The fireproof device further comprises a first elastic member connecting the first extension plate and the main body, for driving the first extension plate to unfold.

7. The energy storage system of claim 6, wherein, The fireproof device further comprises a second extension plate rotatably connected to the other end of the main body in the first direction; In the folded state, the second extension plate and the main body are stacked along the height direction, in the unfolded state, the first extension plate, the main body and the second extension plate are arranged along the first direction.

8. The energy storage system of claim 7, wherein, One side of the main body in a thickness direction is provided with a second groove, in the folded state, the second extension plate is at least partially accommodated in the second groove.

9. The energy storage system of claim 7, wherein, The fireproof device further comprises a second elastic member connecting the second extension plate and the main body, for driving the second extension plate to unfold.

10. The energy storage system of claim 7, wherein, The energy storage system further comprises at least two connecting members arranged at intervals along the first direction, the connecting members being located between the first storage body and the second storage body along the height direction, an opening for the fireproof device to extend out being formed between adjacent two connecting members; In the folded state, along the first direction, a size of the fireproof device is smaller than that of the opening; In the unfolded state, along the first direction, a size of the fireproof device is larger than that of the opening.

11. The energy storage system of claim 10, wherein, The number of the connecting members is two, and the two connecting members are located at two corner positions of a top wall of the second storage body, respectively. Alternatively, the number of the connecting members is three, two of which are located at two corner positions of a top wall of the second storage body, respectively, and the other one is located between the two connecting members.

12. The energy storage system of claim 11, wherein, In the unfolded state, the fireproof device protrudes outward from a side surface of the second storage body along the first direction.

13. The energy storage system of claim 1, wherein, The energy storage system further comprises a partition, which is located between the first and second housings along the height direction. The first end is rotatably connected to the partition.

14. The energy storage system of claim 13, wherein, The partition comprises a first thermal insulation layer.

15. The energy storage system of claim 14, wherein, The first thermal insulation layer comprises at least one of glass wool, rock wool, polyurethane foam board, phenolic foam board, ceramic fiber board, vacuum insulation board, and aerogel.

16. The energy storage system of claim 14, wherein, The partition further comprises a frame, a first partition plate, and a second partition plate, both of which are connected to the frame, and the first thermal insulation layer is located between the first and second partition plates along the thickness direction of the partition.

17. The energy storage system of claim 1, wherein, The surface of the fireproof device, which faces away from the first housing along the height direction, is provided with a fireproof coating.

18. The energy storage system of claim 17, wherein, The fireproof coating comprises a single-component expanded film water-based acrylic coating or an expanded two-component epoxy coating.

19. The energy storage system of claim 1, wherein, The fireproof device comprises a second thermal insulation layer.

20. The energy storage system of claim 19, wherein, The second thermal insulation layer comprises at least one of glass wool, rock wool, polyurethane foam board, phenolic foam board, ceramic fiber board, vacuum insulation board, and aerogel.

21. The energy storage system of claim 1, wherein, The second housing has a battery compartment, and the battery device located in the second housing is accommodated in the battery compartment. The second housing further comprises a battery compartment door, and the fireproof device protrudes from one side of the second housing where the battery compartment door is located.

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