Power storage cabinet and energy storage apparatus

Abstract

A power storage cabinet (100) and an energy storage apparatus (1000). The power storage cabinet (100) comprises a cabinet body (1) and a door leaf (2). The cabinet body (1) is provided with a cabinet door outer frame (101). The door leaf (2) is provided with a door leaf outer frame (201). The cabinet door outer frame (101) is in sealed contact with the door leaf outer frame (201).

Description

Power storage cabinets and energy storage devices

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 14, 2023, with application number 202311516810.8 and invention name “A Power Storage Cabinet and Energy Storage Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular provides a power storage cabinet and an energy storage device. Background Art

[0003] The statements herein merely provide background information related to the present application and do not necessarily constitute prior art.

[0004] An energy storage cabinet is a highly concentrated energy storage device that consists of one or more electrical boxes placed within the cabinet. Typically, when a box experiences thermal runaway, it generates large amounts of high-temperature, high-pressure gas. This gas can accumulate within the cabinet and potentially cause an explosion. This places high safety requirements on energy storage cabinets.

[0005] Traditional power storage cabinets often use fireproof cotton to stick on the inner wall of the cabinet to achieve fire safety. However, a fire in a single electrical box will cause all electrical boxes in the cabinet to burn or even explode, which cannot solve the safety problem from the root.

[0006] Application Contents

[0007] The purpose of this application is to provide a power storage cabinet and an energy storage device, aiming to solve the fire safety problem of existing power storage cabinets.

[0008] To achieve the above objectives, the technical solution adopted in this application is:

[0009] In the first aspect, an embodiment of the present application provides a power storage cabinet including a cabinet body and a door leaf, wherein the cabinet body has a cabinet door outer frame, the door leaf has a door leaf outer frame, the cabinet door outer frame has a first connecting portion arranged along the circumference of the cabinet door outer frame, and the door leaf outer frame has a first matching portion arranged along the circumference of the door leaf outer frame, and the first connecting portion and the first matching portion are sealed in line and surface.

[0010] The embodiments of the present application utilize line-surface sealing technology to flexibly adapt to the gaps between cabinet bodies and door panels of varying sizes, effectively filling the gaps between the cabinet doors and door panels, thereby improving the airtight assembly between the cabinet doors and door panels. The power storage cabinets of the present application achieve a good airtight assembly by sealing the door panel outer frame to the cabinet door outer frame, reducing the probability of fire and explosion, and fundamentally improving fire safety reliability and service life.

[0011] In some embodiments, one of the first connecting portion and the first matching portion is a first sealing ridge, and the other of the first connecting portion and the first matching portion is a first sealing surface.

[0012] The embodiment of the present application adopts the matching first sealing ridge and the first sealing surface to achieve the linear surface sealing of the first connecting portion and the first matching portion, thereby improving the reliability of the linear surface sealing of the cabinet.

[0013] In some embodiments, the first sealing ridge has an embedded portion, the first sealing surface has an elastic deformation portion, and the embedded portion and the elastic deformation portion can be embedded and matched.

[0014] The embodiment of the present application embeds the first sealing ridge into the first sealing surface, which facilitates the rapid assembly of the sealing surface, is highly flexible, and is easy to disassemble, thereby effectively ensuring installation efficiency.

[0015] In some embodiments, the cabinet door outer frame has a second connecting portion arranged along the circumference of the cabinet door outer frame, and the second connecting portion is arranged on the outside of the first connecting portion; the door leaf outer frame has a second matching portion arranged along the circumference of the door leaf outer frame, and the second matching portion is arranged on the outside of the first matching portion; the second connecting portion is sealed and connected to the second matching portion.

[0016] The embodiment of the present application utilizes the sealed cooperation between the second connecting portion and the second matching portion to improve the sealing reliability of the power storage cabinet.

[0017] In some embodiments, one of the second connecting portion and the second matching portion is a second sealing ridge, the other of the second connecting portion and the second matching portion is a second sealing surface, and the second sealing ridge is in sealing contact with the second sealing surface to achieve line-surface sealing.

[0018] The embodiment of the present application utilizes double-layer line and surface sealing to further improve the airtightness of the power storage cabinet.

[0019] In some embodiments, the first connecting portion is a first sealing ridge, and the first matching portion is a first sealing surface; the second connecting portion is a first matching surface, and the second matching portion is a second matching surface.

[0020] The embodiment of the present application adopts a hybrid sealing method of line-surface sealing and surface-surface sealing, which not only provides good sealing performance by line-surface sealing, but also reduces the difficulty of processing the sealing ridge.

[0021] In some embodiments, the first connection portion is provided at an inner edge of the cabinet door outer frame, and the second connection portion is provided at an outer edge of the cabinet door outer frame.

[0022] In the embodiment of the present application, the sealing ridges and the mating surfaces are sequentially arranged on the cabinet door frame or the door leaf frame along a first direction, so as to reduce the difficulty of processing the sealing ridges.

[0023] In some embodiments, the first matching portion is a sealing ring with a square cross-section; the second connecting portion is a portion of the surface of the cabinet door outer frame, and the second matching portion is a sealing ring with an arc-shaped cross-section.

[0024] The embodiment of the present application adopts the arc-shaped edge of the sealing ring to seal the second connecting part. The double-layer wire-wire sealing structure realizes the sealing technology of the high-voltage cabinet with low cost, easy manufacturing and good sealing, and solves the problem of complex and difficult sealing of large high-voltage cabinets.

[0025] In some embodiments, at least one of the first sealing surface, the first mating surface or the second mating surface is part of the surface of the cabinet door frame; and / or, at least one of the first sealing surface, the first mating surface or the second mating surface is part of the surface of the door frame.

[0026] In the embodiment of the present application, a door leaf or a part of the cabinet door body is used as a sealing structure, and there is no need to add a separate sealing component, thereby improving air tightness and maintaining effective sealing for a longer period of time.

[0027] In some embodiments, the first connection portion is formed to protrude from a surface of the cabinet door outer frame along a circumferential direction of the cabinet door outer frame in a direction toward the door leaf outer frame.

[0028] In the embodiment of the present application, since the first connecting portion is integrally manufactured with the cabinet door outer frame, the air tightness of the cabinet body can be effectively improved.

[0029] In some embodiments, the second connection portion is formed to protrude from a surface of the door leaf outer frame along a circumferential direction of the door leaf outer frame in a direction toward the cabinet door outer frame.

[0030] In the embodiment of the present application, since the second connecting portion is made integrally with the door leaf outer frame, the air tightness of the sealing ridge can be effectively improved.

[0031] In some embodiments, the first sealing ridge includes a ridge body and a folded portion formed by bending the ridge body in a direction away from the door leaf.

[0032] In the embodiment of the present application, a folding portion is provided on the first connecting portion or the first matching portion to improve the durability of the sealing effect.

[0033] In some embodiments, the door leaf outer frame has a mounting boss for placing the second mating part; along the protruding direction of the mounting boss, the sum of the size x of the protruding strip body and the size y of the first mating part is h1, and the sum of the size of the mounting boss and the size of the second mating part is h2; the difference between h1 and h2 is less than a preset threshold.

[0034] In the embodiment of the present application, the dimensions of the mounting boss and each sealing portion are adjusted to achieve simultaneous sealing of the two sealing portions, thereby enhancing the sealing effect of the cabinet.

[0035] In some embodiments, the power storage cabinet also includes a hinge assembly; the power storage cabinet also includes a hinge assembly; the hinge assembly includes a movable hinge provided on one of the door leaf outer frame and the cabinet door outer frame, and a static hinge provided on the other of the door leaf outer frame and the cabinet door outer frame; the hinge end of the movable hinge is connected to the hinge end of the static hinge through a hinge shaft.

[0036] This embodiment utilizes a hinge assembly to improve the connection firmness between the cabinet body and the door leaf, thereby improving the air tightness of the high-voltage cabinet.

[0037] In some embodiments, the non-hinge end of the movable hinge and the non-hinge end of the static hinge are locked by a locking assembly.

[0038] This embodiment utilizes a locking assembly to force the end of the hinge shaft to pass through a stopper of the locking assembly. When the hinge is closed, the locking assembly stops the movable hinge, reducing the small gap between the door leaf and the cabinet body caused by the rotation of the hinge shaft, thereby ensuring an airtight effect.

[0039] In some embodiments, the locking assembly includes a locking member provided on one of the movable hinge and the static hinge, and a locking hole provided on the other of the movable hinge and the static hinge and corresponding to the locking member.

[0040] In the embodiment of the present application, the locking member is inserted into the lock hole to fix the locking hinge structure, prevent the hinge from loosening, and better ensure the sealing effect.

[0041] In some embodiments, along the axial direction of the hinge axis, the locking member and the locking hole are centrally arranged on the movable hinge and the static hinge respectively.

[0042] In the embodiment of the present application, the locking member is provided on the movable hinge and the locking hole is provided on the static hinge, so as to facilitate flexible locking or unlocking of the locking member. The central position of the locking member improves the force balance.

[0043] In some embodiments, the power storage cabinet further includes a door support assembly, and the door support assembly includes a door support body disposed at the bottom of the cabinet door frame.

[0044] In the embodiment of the present application, the door support body is used to support the door leaf so that the door leaf can remain in a closed state, effectively solving the problem of the door leaf becoming loose and sagging after long-term use.

[0045] In some embodiments, the door support assembly further includes a roller assembly disposed at the bottom of the door leaf outer frame.

[0046] In the embodiment of the present application, a roller assembly is used to improve the smoothness of opening and closing the door.

[0047] In some embodiments, the door support body is provided with an inclined surface for assisting the rolling of the roller assembly, and the inclined surface is connected to the upper surface of the door support body.

[0048] In the embodiment of the present application, the inclined surface is used to assist the roller assembly in rolling smoothly on the door support body, thereby achieving fast and smooth opening and closing of the door.

[0049] In some embodiments, the power storage cabinet further includes a fixing assembly; the fixing assembly includes a bolt assembly provided on the cabinet door outer frame, and a limiting member provided on the door leaf outer frame and cooperating with the bolt assembly.

[0050] In the embodiment of the present application, with the help of fixing components, when the power storage cabinet is in a closed state, the door leaf and the cabinet door are locked all around, preventing the door leaf from loosening due to impact force, thereby improving the explosion-proof capability of the door leaf and further ensuring the airtight reliability of the power storage cabinet.

[0051] In some embodiments, the bolt assembly includes a swing bolt and a retaining nut.

[0052] In the embodiment of the present application, the ease of installation of the movable bolts reduces the difficulty of airtight assembly of the entire power storage cabinet.

[0053] In some embodiments, the limiting member includes a flat plate, and a recessed portion is provided at one end of the flat plate away from the door leaf, and the recessed portion is used to accommodate the movable bolt.

[0054] In the embodiment of the present application, the installation of the fixing component does not require changes to the cabinet door structure of the cabinet body. It can be adapted to the industry standard size and follows the size of the standard product of the power storage cabinet to ensure the versatility of the product.

[0055] In some embodiments, the bolt assembly further includes a bolt mounting bracket, wherein the bolt mounting bracket is used to mount the swing bolt to the cabinet.

[0056] In the embodiment of the present application, the overall assembly flexibility of the power storage cabinet is improved with the help of the bolt mounting bracket.

[0057] In some embodiments, there are multiple fixing assemblies, and the bolt assemblies are distributed at equal intervals on the periphery of the cabinet door outer frame, and the limiting members are distributed at equal intervals on the periphery of the door leaf outer frame.

[0058] In the embodiment of the present application, multiple fixing components are arranged at intervals, so that the force on the cabinet door is more reasonable, the power storage cabinet can evenly withstand the pressure, and thus can withstand greater impact force, thereby improving the reliability of cabinet door locking.

[0059] In some embodiments, the door leaf outer frame and / or the cabinet door outer frame is an integral sheet metal structure that has been bent multiple times.

[0060] In the embodiment of the present application, an integrated sheet metal structural member that has been bent multiple times is used as an outer frame structural member. The outer frame of the door leaf of the power storage cabinet and / or the outer frame of the cabinet door have higher strength, a more stable structure, and are not easily deformed when subjected to external force. Moreover, the sheet metal structural member is made of metal, is integrally formed, has uniform thickness, and has a good sealing effect, which improves the anti-electromagnetic interference performance of the interior of the cabinet under high-voltage and strong magnetic environments.

[0061] In some embodiments, the air pressure inside the cabinet is greater than the air pressure outside the cabinet.

[0062] In the embodiment of the present application, the air pressure inside the cabinet is set to be greater than the air pressure outside the cabinet, which is conducive to providing a flame retardant environment inside the cabinet.

[0063] In some embodiments, the cabinet is provided with a gas pipeline connection port.

[0064] In the embodiment of the present application, real-time replacement of the gas inside the cabinet is achieved, the content of the inert gas inside the cabinet is increased as much as possible, and a reliable dynamic flame-retardant environment is achieved inside the cabinet.

[0065] In some embodiments, the power storage cabinet is a rectangular parallelepiped structure with a length, width and height of 0.6m to 1m; 1m to 1.5m; and 1.5m to 2.5m respectively.

[0066] In the embodiment of the present application, good airtight assembly of a large power storage cabinet is achieved.

[0067] In some embodiments, at least one battery pack box is placed in the power storage cabinet.

[0068] In the embodiment of the present application, the cabinet sealing technology is adopted to achieve good sealing of high-energy, high-voltage and large-scale power storage cabinets.

[0069] In a second aspect, an embodiment of the present application further provides an energy storage device, comprising the power storage cabinet as described above.

[0070] In the embodiment of the present application, a good airtight assembly with a large energy storage device is achieved.

[0071] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0073] FIG1 is a schematic structural diagram of an energy storage device provided in an embodiment of the present application;

[0074] FIG2 is a perspective view of a power storage cabinet with its door closed in some embodiments of the present application;

[0075] FIG3 is a perspective view of a power storage cabinet with its door open in some embodiments of the present application;

[0076] FIG4 is a partial schematic diagram of a door leaf outer frame and a cabinet door outer frame in a state to be sealed according to some embodiments of the present application;

[0077] FIG5 is a partial schematic diagram of a door leaf outer frame and a cabinet door outer frame in a sealed state according to some embodiments of the present application;

[0078] FIG6 is a schematic structural diagram of a hinge assembly according to some embodiments of the present application;

[0079] FIG7 is a schematic structural diagram of a door support assembly according to some embodiments of the present application;

[0080] FIG8 is a schematic structural diagram of a door support assembly according to some other embodiments of the present application;

[0081] FIG9 is a schematic structural diagram of a fixing assembly according to some embodiments of the present application;

[0082] FIG10 is a schematic structural diagram of a bolt assembly according to some embodiments of the present application;

[0083] FIG11 is a schematic structural diagram of a door panel assembly according to Example 1 of the present application;

[0084] Among them, the reference numerals in the figures are:

[0085] 1000, energy storage device; 100, power storage cabinet;

[0086] 1. Cabinet body; 2. Door leaf; 3. Air outlet; 4. Hinge assembly; 5. Gas line connection port; 6. Door support assembly; 7. Fixing assembly; 101. Door frame; 201. Door leaf frame; 202. Longitudinal beam; 203. Crossbeam; 204. Skin; 401. Dynamic hinge; 402. Static hinge; 403. Hinge shaft; 404. Locking piece; 405. Lock hole; 406. Opening retaining ring; 601. Door support body; 602. Roller assembly; 603. Inclined surface; 701. Bolt assembly; 702. Limiting member; 10101, first connecting part; 20101, first matching part; 10102, second connecting part; 20102, second matching part; 60201, roller bracket; 60202, roller; 60203, axle pin; 70101, live bolt; 70102, fixing nut; 70103, bolt mounting bracket; 70104, pin; 70105, stopper; M, folding part; T, convex strip body; H, mounting boss; N, recessed part; S, accommodating cavity; G, limiting step.

[0087] Implementation Methods of the Application

[0088] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0089] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0090] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0091] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0092] Currently, with the vigorous development of new energy, the use of new energy power batteries is increasing. New energy batteries, with their outstanding advantages such as high cost-effectiveness, excellent safety, and low pollution, have achieved increasingly widespread application, not only in general electronics but also in the power and energy storage fields. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace, among other fields. As the application areas of power batteries continue to expand, their market demand is also continuously increasing. As a core component of new energy power devices, the safety of power batteries directly affects the safety performance of the power devices.

[0093] A power storage cabinet is a highly concentrated energy storage device that houses one or more battery pack enclosures (hereinafter referred to as "battery boxes"). Due to the high voltage within the battery boxes, thermal runaway can generate large amounts of high-temperature, high-pressure gas. This gas can accumulate within the cabinet, potentially causing an explosion. To address this, power storage cabinets are often filled with nitrogen to mitigate fire safety hazards posed by thermal runaway.

[0094] The structure of a power storage cabinet consists of a cabinet body and doors. Related technologies often only consider the connection between the cabinet body and doors, without considering detailed sealing solutions. Especially for large power storage cabinets, the clearance between the cabinet body and doors is difficult to control within the desired range, and ensuring the airtightness of the installation between the cabinet body and doors is often difficult. Due to the poor airtightness of the power storage cabinet, nitrogen gas inside the cabinet can leak out, and air from the external environment can flow into the cabinet. In the event of thermal runaway of the electrical box, the reduction in nitrogen gas inside the cabinet and the influx of new outside air can make the cabinet prone to fire and safety accidents. Furthermore, due to the poor sealing of the power storage cabinet, high-temperature, high-pressure gas inside the cabinet can easily diffuse outward, causing the fire to spread outside the cabinet, causing the power storage cabinet to increase the safety risks of electrical devices. Therefore, the safety performance of electrical devices places strict requirements on the airtightness of the power storage cabinet.

[0095] To improve the overall safety of electrical equipment, some related technologies utilize a tailored welding method for the full-edge welding of the cabinet body. This reduces the clearance between the cabinet body and the door panels, significantly improving structural strength. However, due to the numerous welds and thin steel plates, achieving airtightness in the cabinet body is challenging, resulting in poor product consistency. Some related technologies also employ additional sealing and inspection equipment to reduce the gap between the cabinet body and the door panels. This increases the technical difficulty and cost of manufacturing large cabinets, making them less practical. For large cabinets, due to their large size, achieving airtightness is often difficult with related technologies, posing a significant fire safety hazard. Some related technologies employ fireproofing with fireproof cotton applied to the inner walls of large cabinets to achieve fire safety. However, a single battery cell fire can cause combustion or even explosion of all cells within the cabinet, failing to address the root cause of cabinet fires and explosions. In these related technologies, cabinet sealing is often difficult to achieve as expected.

[0096] To address these issues, the present invention proposes a power storage cabinet. By sealing the door leaf and door frames, this cabinet reduces the probability of fire and explosion, fundamentally improving fire safety and reliability. Compared to traditional power storage cabinet structures, the present invention achieves an airtight assembly, thereby fundamentally improving the cabinet's fire safety, reliability, and service life.

[0097] Of course, it is particularly important to emphasize that the cabinet sealing technology of the present application includes but is not limited to use in power storage cabinets, and can also be used for other cabinet devices in a high-temperature and high-pressure environment inside the cabinet, for example, it can also be used in distribution cabinets, junction cabinets, etc.

[0098] The embodiments of the present application provide an energy storage device using a power storage cabinet as a power source. The energy storage device can be, but is not limited to, electric toys, electric tools, battery vehicles, electric vehicles, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0099] In the embodiments of the present application, the power storage cabinet may include, but is not limited to, a cabinet-type energy storage device having a storage space, wherein one or more electrical boxes (full name: battery pack box) may be placed within the storage space, wherein the electrical box is used to provide power to the power storage cabinet. In the embodiments of the present application, the electrical box is composed of at least one battery pack.

[0100] The following further explains the relevant concepts of the embodiments of the present application.

[0101] A cell is the smallest functional unit of an electrochemical cell, consisting of a single positive and negative electrode. Unlike a battery, which contains protective circuitry and a housing and can be used directly, a cell must have a high energy density and store as much energy as possible. Furthermore, the lifespan of the cell is crucial; damage to any cell can damage the entire battery pack.

[0102] Battery module: When multiple battery cells are encapsulated together in the same outer shell frame and connected to the outside through a unified boundary, this forms a module.

[0103] Battery pack: When several modules are jointly controlled or managed by the battery management system (BMS) and thermal management system, this unified whole is called a battery pack.

[0104] The difference between battery cells, modules and battery packs lies not only in the number of batteries, but also in whether they have an additional management system.

[0105] Please refer to FIG. 1 . In a first aspect, an embodiment of the present application provides an energy storage device 1000 , including a power storage cabinet 100 .

[0106] The energy storage device 1000 of the embodiment of the present application has a good airtight effect, which improves the fire safety performance of the energy storage device 1000.

[0107] In some embodiments, the energy storage device 1000 further includes a controller, a fire-fighting medium source, a cooling medium source, etc., which are connected to the power storage cabinet 100 through wire holes and inlets and outlets, respectively.

[0108] Please refer to Figures 2 to 5. An embodiment of the present application provides a power storage cabinet 100, comprising: a cabinet body 1 and a door leaf 2, the cabinet body 1 having a cabinet door outer frame 101, the door leaf 2 having a door leaf outer frame 201, the cabinet door outer frame 101 and the door leaf outer frame 201 being in sealing contact; the cabinet door outer frame 101 having a first connecting portion 10101 arranged along the circumference of the cabinet door outer frame 101, the door leaf outer frame 201 having a first matching portion 20101 arranged along the circumference of the door leaf outer frame 201, the first connecting portion 10101 and the first matching portion 20101 being sealed in line and surface.

[0109] It is worth noting that, in the technical solution of the embodiment of the present application, the sealed contact between the cabinet door outer frame 101 and the door leaf outer frame 201 can be achieved in a variety of ways.

[0110] For example, in some embodiments, an independent seal is provided on the contact surface between the cabinet door outer frame 101 and the door leaf outer frame 201. The seal is sandwiched in the gap between the cabinet door outer frame 101 and the door leaf outer frame 201. The cabinet door outer frame 101 and / or the door leaf outer frame 201 press the seal toward the other one, thereby achieving an airtight assembly of the cabinet door outer frame 101 and the door leaf outer frame 201. The independent seal means that the seal is separable from the cabinet door outer frame 101 and the door leaf outer frame 201.

[0111] For example, the sealing member may include but is not limited to a rubber strip, a rubber ring, an elastic gasket, etc. that is sleeved on the cabinet door outer frame 101 or the door leaf outer frame 201.

[0112] For another example, in some embodiments, based on the body of the cabinet door outer frame 101 and the body of the door leaf outer frame 201, respectively, a sealing structure integrally provided for use with each other is provided. The sealing structure of the cabinet door outer frame 101 is an integral structure with the cabinet door outer frame 101, and the sealing structure of the door leaf outer frame 201 is an integral structure with the door leaf outer frame 201. The sealing structure of the cabinet door outer frame 101 and the sealing structure of the door leaf outer frame 201 are adapted to be installed and squeezed against each other. The sealing structure after squeezing and installation fills the gap between the cabinet door outer frame 101 and the door leaf outer frame 201, thereby achieving an airtight assembly of the cabinet door outer frame 101 and the door leaf outer frame 201.

[0113] Exemplarily, the sealing structure may include but is not limited to: an elastic protruding structural member provided on the cabinet door outer frame 101 or the door leaf outer frame 201 and protruding toward the other one, and a sealing groove provided on the other one of the cabinet door outer frame 101 and the door leaf outer frame 201. The elastic protruding structural member and the sealing groove are arranged correspondingly, and the elastic protruding structural member extends into the sealing groove. The elastic deformation of the elastic protruding structural member is utilized to compensate for the gap between the cabinet door outer frame 101 and the door leaf outer frame 201.

[0114] Wherein, along the circumference of the cabinet door outer frame 101 or the door leaf outer frame 201, the elastic protrusion structure is a continuous structure or a discontinuous structure. Exemplarily, the elastic protrusion structure may include but is not limited to: elastic convex strips, elastic protrusions, elastic buckles and other structures integrally protruded on the door leaf outer frame 201 or the cabinet door outer frame 101. The sealing groove may include but is not limited to: a continuous annular groove structure recessed on the door leaf outer frame 201 or the cabinet door outer frame 101, the continuous annular groove structure accommodating at least one elastic protrusion structure; or, a discontinuous opening structure recessed on the door leaf outer frame 201 or the cabinet door outer frame 101, the discontinuous opening structure being arranged in a one-to-one correspondence with the elastic protrusion structure. Wherein, the number of elastic protrusion structures and sealing grooves may be one-to-many, many-to-one, many-to-many or one-to-one. By means of the coordinated installation and mutual compression of the elastic raised structural member and the sealing groove, the gap between the cabinet door outer frame 101 and the door leaf outer frame 201 is filled, thereby achieving airtight assembly of the cabinet door outer frame 101 and the door leaf outer frame 201.

[0115] In the technical solution of the embodiment of the present application, the relative deformation of the seal and / or sealing structure under compression can be designed to be greater than the relative deformation of the cabinet door outer frame 101. The elastic deformation of the seal and / or sealing structure can be used to offset the processing deformation and the use deformation of the cabinet door outer frame 101 of the power storage cabinet 100, thereby filling the gap between the mating contact surfaces. Thus, the seal and / or sealing structure can be used to improve the sealing performance of the power storage cabinet 100. The sealed contact between the cabinet door outer frame 101 and the door leaf outer frame 201 achieves airtight assembly of the cabinet body 1 and the door leaf 2.

[0116] Due to the sealed assembly between the cabinet door outer frame 101 and the door leaf outer frame 201, nitrogen inside the cabinet body 1 is unlikely to leak into the environment outside the cabinet body 1, and air outside the cabinet body 1 is unlikely to flow into the interior of the power storage cabinet 100. Therefore, even in the event of battery thermal runaway within the power storage cabinet 100, a sufficient amount of nitrogen can still be maintained within the cabinet body 1, and oxygen is isolated, ensuring an inert environment within the cabinet. This significantly reduces the probability of fire within the power storage cabinet 100 and improves the safety performance of the power storage cabinet 100. Furthermore, because the power storage cabinet 100 of this embodiment has excellent airtightness, high-temperature, high-pressure gas accumulated within the cabinet body 1 is unlikely to escape outside the cabinet, significantly reducing the occurrence of safety accidents involving electrical devices within the power storage cabinet 100.

[0117] In some embodiments, in order to further improve the airtightness of the cabinet body 1 and the door leaf 2, transition fillets are designed at the lower left corner, upper left corner, lower right corner, and lower right corner of the cabinet body 1 and the door leaf 2 to reduce the friction loss between the cabinet body 1 and the door leaf 2 at each corner position of the energy storage cabinet, thereby improving the durability of the airtight effect of the energy storage cabinet 100.

[0118] In some embodiments, the cabinet body 1 is further provided with a threading hole, in which other sealing components connected to the cabinet body 1 are installed to improve the airtightness of the cabinet body 1 .

[0119] Compared to traditional power storage cabinets, the power storage cabinet 100 of the present embodiment achieves an airtight assembly by sealingly connecting the door leaf outer frame 201 to the cabinet door outer frame 101. This reduces the probability of fire and explosion, fundamentally improving fire safety reliability and service life. Furthermore, the batteries housed within the sealed power storage cabinet 100 can be used in various environments with humidity, waterlogging, and severe corrosion, while the airtight assembly of the cabinet body 1 reduces damage to the batteries within the cabinet.

[0120] In the technical solution of the embodiment of the present application, the circumference of the cabinet door outer frame 101 refers to the four sides of the cabinet door outer frame 101. That is, the cabinet door outer frame 101 has a first connecting portion 10101 arranged along the circumference of the cabinet door outer frame 101, which means that the first connecting portion 10101 is arranged around the four sides of the cabinet door outer frame 101. The circumference of the door leaf outer frame 201 refers to the four sides of the door leaf outer frame 201. That is, the door leaf outer frame 201 has a first matching portion 20101 arranged along the circumference of the door leaf outer frame 201, which means that the first matching portion 20101 is arranged around the four sides of the door leaf outer frame 201. The circumference of the cabinet door outer frame 101 and the circumference of the door leaf outer frame 201 in the following text can also be interpreted in the same way.

[0121] It is worth noting that in the technical solution of the embodiment of the present application, the first connecting portion 10101 and the first matching portion 20101 are sealed and cooperated to form a first sealing unit. The first connecting portion 10101 and the first matching portion 20101 are used to achieve the assembly between the cabinet door outer frame 101 and the door leaf outer frame 201, and are the contact portions at the intersection between the cabinet door outer frame 101 and the door leaf outer frame 201 in the assembled state.

[0122] The line-surface seal mentioned in the embodiments of the present application refers to two objects in contact, wherein the end face structure of the contact portion of one of the objects that is mated with the other object is a planar structure, and the end face structure of the contact portion of the other object that is mated with the other object is a non-planar structure such as a linear body and / or a point body. At the contact portion where the planar structure and the non-planar structure intersect, the non-planar structure is assembled into the planar structure, so that the contact portion between the first connecting portion 10101 and the first mating portion 20101 is in complete contact, thereby achieving a line-surface contact airtight assembly of the two objects. In some embodiments, the cross-section of the first connecting portion 10101 is designed to be the aforementioned non-planar structure, and the cross-section of the second connecting portion 10102 is designed to be a planar structure.

[0123] For example, as shown in Figure 3, the end face of the first connecting part 10101 and the end face of the first matching part 20101 are perpendicular or approximately perpendicular to the plane where the contact part between the first connecting part 10101 and the first matching part 20101 is located; wherein, the end face of the first connecting part 10101 is point-shaped, and the end face of the first matching part 20101 is plane-shaped, and the connection between the first connecting part 10101 and the first matching part 20101 is line-surface contact, and is airtightly assembled, thereby realizing line-surface sealing between the cabinet door outer frame 101 and the door leaf outer frame 201.

[0124] In order to achieve airtight assembly of the door leaf outer frame 201 and the cabinet door outer frame 101 , at least one of the non-planar structure and the planar structure is made of a deformable elastic material.

[0125] Due to production and processing reasons or long-term use, the cabinet door and door leaf 2 of the power storage cabinet 100 may have multiple uneven areas with inconsistent surface flatness along the circumferential direction, resulting in inconsistent sizes of the gaps between the cabinet door and the door leaf 2. In response to this, the embodiment of the present application utilizes line-surface sealing technology to assemble a non-planar structure at the contact portion into a planar structure to fill the gap between the cabinet door and the door leaf 2 at that location. In addition, the elastic deformation at each contact portion is utilized to flexibly adapt to the corresponding gaps of inconsistent sizes, thereby effectively filling the gap between the cabinet body 1 and the door leaf 2, thereby improving the airtight assembly effect between the cabinet body 1 and the door leaf 2.

[0126] Among them, since the gaps between the cabinet door and the door leaf 2 may be scattered along the circumferential direction of the cabinet door or the circumferential direction of the door leaf 2, in order to completely fill all the gaps, the first connecting part 10101 can be a plurality of sealing structures scattered in the circumferential direction of the cabinet door outer frame 101, and the second connecting part 10102 can be a plurality of sealing structures scattered in the circumferential direction of the door leaf outer frame 201; the first connecting part 10101 can also be a non-interrupted sealing structure arranged along the circumferential direction of the cabinet door outer frame 101, and the second connecting part 10102 can also be a non-interrupted sealing structure arranged along the circumferential direction of the cabinet door outer frame 101.

[0127] For example, the non-planar structure can be a non-discontinuous structure such as elastic convex strips or non-elastic convex strips, or a discontinuous structure such as elastic protrusions or non-elastic protrusions. The planar structure can also be an elastic sealing plane, a non-elastic sealing plane, etc., wherein line-surface sealing is achieved by assembling the convex strips or protrusions into the sealing plane.

[0128] According to some embodiments of the present application, one of the first connecting portion 10101 and the first matching portion 20101 is a first sealing ridge, and the other of the first connecting portion 10101 and the first matching portion 20101 is a first sealing surface.

[0129] In the technical solution of this embodiment, the non-planar structure is designed as a ridge structure, and the planar structure is designed as a planar structure. The sealing ridge is assembled into the sealing plane, and the first sealing ridge is in sealing contact with the first sealing surface to achieve a linear seal. Because the sealing ridge is a continuous, integrated structure, the sealing structure between the cabinet door and the door leaf 2 is less likely to fall off, thereby improving the sealing stability of the linear seal.

[0130] For example, the non-planar structure can be a rubber ring whose cross-section at the contact portion has one or more linear protrusions, such as corners, edges, vertices, or edges, projecting toward the planar structure. The planar structure can be another type of rubber ring whose cross-section at the contact portion has one or more flat or concave arcuate surfaces, recessed toward the non-planar structure. In this way, by assembling the integrated non-planar structure within the planar structure, the contact and fit between the two improves the reliability of the linear seal of the power storage cabinet 100.

[0131] Please refer to FIG. 5 . According to some embodiments of the present application, the first sealing ridge has an embedded portion, and the first sealing surface has an elastic deformation portion. The embedded portion and the elastic deformation portion can be embedded and matched.

[0132] In this embodiment, the first sealing ridge and the first sealing surface may be assembled by, but not limited to, gluing, embedding, or snapping. Embedding the first sealing ridge within the first sealing surface facilitates rapid assembly of the sealing surface, provides high flexibility, and facilitates easy disassembly, thereby effectively ensuring installation efficiency.

[0133] In this embodiment, the embedded sealing ridges and the sealing surface are tightly pressed together to achieve a linear seal. After the sealing ridges are embedded in the sealing surface, the compression of the sealing ridges and the depth of the sealing ridges embedded in the sealing surface must ensure the reliability of the linear seal. In a specific implementation of this linear seal, one of the sealing ridges and the sealing surface can be designed as an elastic component and the other as a rigid component. For example, an elastic sealing surface can be equipped with a rigid sealing ridge, or a rigid sealing surface can be equipped with an elastic sealing ridge.

[0134] In some specific embodiments, the four edges of the cabinet door outer frame 101 are bent in the direction pointing toward the door leaf outer frame 201 to form a bent portion, and the bent portion is the first sealing ridge; the first sealing surface can be an elastic structural member such as a rubber pad, a rubber strip, etc. pasted on the door leaf outer frame 201, and the bent portion can be embedded in the elastic structural member, so that when the door leaf 2 is in a closed state, the first sealing ridge is embedded in the first sealing surface.

[0135] Referring to FIG. 3 to FIG. 5 , according to some embodiments of the present application, the cabinet door outer frame 101 has a second connection portion 10102 disposed along the circumference of the cabinet door outer frame 101 , and the second connection portion 10102 is disposed around the outer side of the first connection portion 10101 ;

[0136] The door leaf outer frame 201 has a second matching portion 20102 arranged along the circumference of the door leaf outer frame 201 . The second matching portion 20102 is arranged on the outside of the first matching portion 20101 , and the second connecting portion 10102 is sealed and connected to the second matching portion 20102 .

[0137] In the technical solution of the embodiment of the present application, the second connecting portion 10102 and the second matching portion 20102 are airtightly assembled to form a second sealing unit. In some specific embodiments, the second connecting portion 10102 can be a sealing strip attached to the cabinet door outer frame 101, and the second matching portion 20102 is the surface of the door leaf outer frame 201, and the surface of the door leaf outer frame 201 and the sealing strip are matched one-to-one. Alternatively, the second connecting portion 10102 is the surface of the cabinet door outer frame 101, and the second matching portion 20102 is a sealing strip attached to the door leaf outer frame 201, and the surface of the door leaf outer frame 101 and the sealing strip are matched one-to-one.

[0138] In this embodiment of the present application, the second sealing unit can be used to operate simultaneously with the first sealing unit to achieve a double-layer seal between the cabinet door 100 and the door leaf 2, thereby improving the sealing effect. In addition, the second sealing unit can also be used to supplement the sealing of the cabinet 100 when the sealing of the first sealing unit fails, thereby improving the sealing reliability.

[0139] In some embodiments, according to actual needs, the matching mode of the second connecting portion 10102 and the second matching portion 20102 can be flexibly designed, for example, the contact portion between the two can be designed as a line-surface seal or a surface-surface seal. The surface-surface seal means that the end face structures of the contact portions of the second connecting portion 10102 and the second matching portion 20102 used for matching and installing with each other are both planar structures, and at the contact portion position where the two intersect, the surface-surface contact airtight assembly of the cabinet door outer frame 101 and the door leaf outer frame 201 is achieved through the contact between the surface structure and the surface structure. In addition, the line-surface seal between the second connecting portion 10102 and the second matching portion 20102 is the same as the line-surface seal technology between the first sealing ridge and the first sealing surface mentioned above, and will not be repeated here.

[0140] In some embodiments, to improve sealing performance, the power storage cabinet 100 can also be designed as a multi-layer sealing structure with three or more layers. For example, the power storage cabinet 100 includes a first sealing unit and two second sealing units. The first sealing unit includes a sealing ridge provided on the inner edge of the cabinet door frame 101 and a sealing surface adhered to the door leaf frame 201. The second sealing unit includes two pairs of sealing surfaces adhered to the cabinet door frame 101 and the door leaf frame 201 for use in conjunction. To facilitate the manufacture and assembly of the sealing units, adjacent sealing units are arranged at equal intervals.

[0141] According to some embodiments of the present application, one of the second connecting portion 10102 and the second matching portion 20102 is a second sealing ridge, and the other of the second connecting portion 10102 and the second matching portion 20102 is a second sealing surface. The second sealing ridge is in sealing contact with the second sealing surface to achieve line-surface sealing.

[0142] Compared with surface sealing, line-surface sealing has a good sealing effect. Therefore, in the embodiment of the present application, the seal between the first connecting part 10101 and the first matching part 20101, and the seal between the second connecting part 10102 and the second matching part 20102 are both designed as a line-surface sealing method combining a sealing ridge and a sealing surface, so as to utilize double-layer line-surface sealing to further improve the airtight effect of the power storage cabinet 100.

[0143] In the technical solutions of the embodiments of the present application, the implementation methods of the linear and surface seals between the first connecting portion 10101 and the first mating portion 20101, and between the second connecting portion 10102 and the second mating portion 20102, can be flexibly designed according to actual needs. Specifically, the linear and surface seals between the second sealing ridge and the second sealing surface refer to the linear and surface seals between the first sealing ridge and the first sealing surface in the aforementioned sealing technology between the first connecting portion 10101 and the first mating portion 20101, and will not be further described here.

[0144] In a specific embodiment, the first connecting portion 10101 is a first sealing ridge, and the first mating portion 20101 is a first sealing surface. The first sealing ridge can be assembled into the first sealing surface to achieve a line-surface seal between the first connecting portion 10101 and the first mating portion 20101. The second connecting portion 10102 is a second sealing surface, and the second mating portion 20102 is a second sealing ridge. The second sealing ridge can be assembled into the second sealing surface to achieve a surface-line seal between the second connecting portion 10102 and the second mating portion 20102. In this way, the double-layer sealing structure utilizes line-surface contact sealing technology to further improve the sealing performance of the power storage cabinet 100.

[0145] Please refer to Figures 3 to 5. According to some embodiments of the present application, the first connecting portion 10101 is a first sealing ridge, the first matching portion 20101 is a first sealing surface; the second connecting portion 10102 is a first matching surface, and the second matching portion 20102 is a second matching surface.

[0146] For large-scale power storage cabinets 100, due to their large size, processing ridges on them makes sealing difficult. Furthermore, since the door leaf 2 is typically a flat, thin plate, its overall strength is lower than that of the cabinet body 1 of the power storage cabinet 100. Therefore, in the technical solution of the embodiment of the present application, the sealing ridges are only provided on the cabinet door outer frame 101, while only a planar structure is provided on the door leaf outer frame 201. That is, a hybrid sealing method of line-surface sealing and surface-surface sealing is adopted. In this way, while providing good sealing performance due to line-surface sealing, the processing difficulty of the sealing ridges is also reduced, which is conducive to the implementation of the sealing technology for large-scale power storage cabinets 100. It also avoids the problem of reducing the overall strength of the door leaf 2 and thus reducing the airtightness of the power storage cabinet 100 due to the provision of sealing ridges on the door leaf 2.

[0147] In addition, in order to reduce the processing difficulty of the sealing structure on the cabinet door outer frame 101, in other embodiments, the sealing ridge can be set only on the door leaf outer frame 201, that is, the sealing ridge is set only on one of the first connecting part 10101 or the second connecting part 10102, so as to achieve line-surface sealing and surface-surface sealing.

[0148] Please refer to Figures 3 to 5. According to some embodiments of the present application, the first connection portion 10101 is provided at the inner edge of the cabinet door frame 101, and the second connection portion 10102 is provided at the outer edge of the cabinet door frame 101.

[0149] It is worth noting that in all embodiments of the present application, the inner edge of the cabinet door outer frame 101 refers to the edge of the cabinet door outer frame 101 on the side close to the interior of the cabinet body 1; the outer edge of the cabinet door outer frame 101 refers to the edge of the cabinet door outer frame 101 on the side close to the outside of the cabinet body 1; the inner edge of the door leaf outer frame 201 refers to the edge of the door leaf outer frame 201 on the side close to the interior of the cabinet body 1; the outer edge of the door leaf outer frame 201 refers to the edge of the door leaf outer frame 201 on the side close to the outside of the cabinet body 1.

[0150] Exemplarily, the first sealing ridge is provided on the inner edge of the cabinet door frame 101 , and the first mating surface is provided on the outer edge of the cabinet door frame 101 .

[0151] Since the cabinet door outer frame 101 or the door leaf outer frame 201 is often bound to the cabinet door or door leaf 2 at its outer edge, and there is no cabinet door or door leaf 2 entity at the inner edge, the difficulty of processing the first sealing ridge on the inner edge is much easier than that on the outer edge. Based on this, in order to take into account the processing difficulty of the line and surface seal, this embodiment reduces the processing difficulty of the first sealing ridge by sleeve-forming the mating surface on the outer side of the first sealing ridge.

[0152] In the technical solution of this embodiment, in the case where the cabinet door outer frame 101 has a sealing ridge, by designing the first sealing ridge to be located at the inner edge of the cabinet door outer frame 101 and the first mating surface to be located at the outer edge of the cabinet door outer frame 101, it is convenient to form the first sealing ridge integrally on the cabinet door outer frame 101 by curling the edge of the cabinet door outer frame 101 on the base of the cabinet door outer frame 101, thereby reducing the difficulty of processing the sealing ridge on the cabinet door of the power storage cabinet 100.

[0153] In this embodiment, a double-layer sealing structure of inner circle line-to-surface contact sealing and outer circle surface-to-surface contact sealing is realized between the cabinet body 1 and the door leaf 2 of the power storage cabinet 100 by means of a sealing ridge structure formed by the inner ring flange of the cabinet door outer frame 101 and an additional outer ring sealing strip, and the outer ring sealing strip and the flat section of the door leaf outer frame 201 are pressed tightly together to achieve a stable airtightness of the cabinet body 1.

[0154] In addition, for other situations of double-layer sealing using a combination of line-surface sealing and surface-surface sealing, for example, when the sealing ridge is provided on the door leaf outer frame 201, in order to facilitate the production and assembly of the sealing ridge structure on the door leaf outer frame 201, the sealing ridge can also be arranged on the inner edge of the door leaf outer frame 201, that is, the edge of the door leaf outer frame 201 is folded and curled.

[0155] Please refer to Figure 4. According to some embodiments of the present application, the first matching portion 20101 is a sealing ring with a square cross-section; the second connecting portion 10102 is a part of the surface of the cabinet door frame 101, and the second matching portion 20102 is a sealing ring with an arc-shaped cross-section.

[0156] Exemplarily, the first sealing surface is a sealing ring with a square cross-section, the first mating surface is a portion of the surface of the cabinet door outer frame 101, and the second mating surface is a sealing ring with an arc-shaped cross-section, and the curved edge of the sealing ring is in sealing contact with the first mating surface.

[0157] In the technical solution of the embodiment of this application, the contact between the first and second mating surfaces of the second sealing unit, that is, the contact between the plane of the cabinet door frame 101 and the line at the arc apex of the arc-shaped sealing ring, can be considered as line-surface contact. Based on this, and because the sealing method of the first sealing unit is a line-surface contact seal formed by the sealing ridge and the sealing surface, this embodiment can be understood as a double-layer line-surface seal.

[0158] Among them, since the sealing rings with square cross-sections and arc-shaped cross-sections can be selected as standard parts, for example, the arc-shaped sealing ring can be selected as a commercially available standard sealing ring with a semicircular cross-section. Therefore, this embodiment realizes the sealing technology of the power storage cabinet 100 with low cost, easy manufacturing, and good sealing, and solves the problem of complex and difficult sealing of large power storage cabinets 100.

[0159] In some embodiments, at least one of the first sealing surface, the first mating surface or the second mating surface is a rubber pad provided on the cabinet door outer frame 101; and / or, at least one of the first sealing surface, the first mating surface or the second mating surface is a rubber pad provided on the door leaf outer frame 201.

[0160] For line-surface and surface-surface sealing, setting the planar structure in the contact portion as a rubber pad can be more convenient to manufacture. Since the rubber pad is low-cost, it can further reduce the sealing cost of the power storage cabinet 100. In some embodiments, according to actual needs, the rubber pad can be set on the cabinet door frame 101 or the door leaf frame 201.

[0161] For example, for the surface-to-surface sealed second connection portion 10102 and the second mating portion 20102, the first mating surface may be a rubber pad provided on the cabinet door outer frame 101, and the second mating surface may be a rubber pad provided on the door leaf outer frame 201. For another example, for the line-to-surface sealed first connection portion 10101 and the first mating portion 20101, the second sealing surface may be a rubber pad provided on the door leaf outer frame 201.

[0162] Please refer to Figures 3-5. According to some embodiments of the present application, at least one of the first sealing surface, the first mating surface or the second mating surface is a part of the surface of the cabinet door frame 101; and / or, at least one of the first sealing surface, the first mating surface or the second mating surface is a part of the surface of the door leaf frame 201.

[0163] For line-surface sealing and surface-surface sealing, the planar structure in the contact portion is designed as a part of the surface of the cabinet door outer frame 101 or the door leaf outer frame 201 of the power storage cabinet 100. Since the planar structure is a part of the cabinet door outer frame 101 or the door leaf outer frame 201, there is no need to add a separate seal, thereby improving the airtightness of the power storage cabinet 100 and maintaining effective sealing for a longer period of time.

[0164] Please refer to Figures 3 to 5. According to some embodiments of the present application, the first connection portion 10101 is formed on the surface of the cabinet door frame 101 and protrudes along the circumference of the cabinet door frame 101 toward the door leaf frame 201.

[0165] Exemplarily, the first sealing ridge is formed based on the surface of the cabinet door outer frame 101 and protrudes along the circumference of the cabinet door outer frame 101 in a direction toward the door leaf outer frame 201 .

[0166] In this embodiment, the first connecting portion 10101 is folded outwardly along the circumference of the cabinet door outer frame 101 at the outer edge of the cabinet door outer frame 101, and rolled up to form a raised structure, namely, a first sealing ridge, which serves as a non-planar structure of the contact portion. Since the sealing ridge A is integrally formed with the cabinet door outer frame 101, the airtightness of the sealing ridge can be effectively improved.

[0167] Please refer to Figures 3 to 5. According to some embodiments of the present application, the second sealing ridge of the second connecting portion 10102 is formed based on the surface of the door leaf outer frame 201 and protrudes along the circumference of the door leaf outer frame 201 toward the cabinet door outer frame 101.

[0168] Exemplarily, the second sealing ridge is formed based on the surface of the door leaf outer frame 201 and protrudes along the circumference of the door leaf outer frame 201 in a direction toward the cabinet door outer frame 101 .

[0169] Regarding the second connecting portion 10102 or second mating portion 20102, when the sealing ridge is provided on the door frame 201, the outer edge of the door frame 201 is folded outward along the circumferential direction of the door frame 201, forming a raised structure, i.e., a second sealing ridge, which serves as a non-planar contact structure. Since the sealing ridge B is integrally formed with the door frame 201, the airtightness of the sealing ridge is effectively improved.

[0170] Please refer to FIG. 4 . According to some embodiments of the present application, the first sealing ridge includes a ridge body T and a folded portion M formed by bending the ridge body T in a direction away from the door leaf 2 .

[0171] The folded portion M forms a certain angle with the protruding strip body T, allowing the folded portion M to fit into the first mating portion 20101. The angle can be between 0° and 90°. To ensure sufficient strength, the angle is preferably between 0° and 10°, meaning that the folded portion M completely overlaps or nearly overlaps with the protruding strip body T.

[0172] Specifically, when the first connecting portion 10101 is provided on the inner edge of the cabinet door outer frame 101, it is based on the inner edge of the cabinet door outer frame 101 and is bent multiple times in the direction pointing to the door leaf outer frame 201 to form the folding portion M; or, when the first matching portion 20101 is provided on the inner edge of the door leaf outer frame 201, it is based on the inner edge of the door leaf outer frame 201 and is bent multiple times in the direction pointing to the door leaf outer frame 201 to form the folding portion M.

[0173] During the closing process of the door leaf 2, the first connecting portion 10101 is embedded in the first sealing surface, or the first mating portion 20101 is embedded in the first connecting portion 10101, thereby achieving a linear seal between the first connecting portion 10101 and the first sealing surface, thereby improving the firmness between the door leaf 2 and the cabinet door. The folded portion M can increase the contact area between each connecting portion and the corresponding mating portion, making the contact between each connecting portion and the corresponding mating portion more tight and secure, thereby improving the airtightness effect and the durability of the seal.

[0174] In the technical solution of the embodiment of the present application, a folding portion M is provided on the first connecting portion 10101 or the first matching portion 20101 to improve the durability of the sealing effect.

[0175] Please refer to FIG. 4 and FIG. 5 . According to some embodiments of the present application, the door leaf outer frame 201 has a mounting boss H for placing the second matching portion 20102 .

[0176] Along the protruding direction of the mounting boss H, the sum of the size x of the protruding strip body T and the size y of the first matching portion 20101 is h1, and the sum of the size of the mounting boss H and the size of the second matching portion 20102 is h2; the difference between h1 and h2 is less than the preset threshold.

[0177] In this embodiment, there are many possible implementation methods for adjusting h1 and h2. For example, the length of the raised section of the first connecting portion 10101 can be changed along the direction from the first connecting portion 10101 to the first matching portion 20101, that is, the length of the protruding strip body T can be changed. Another example is that the size of the raised section of the door leaf outer frame 201 for mounting the second matching portion 20102 can be changed along the direction from the door leaf outer frame 201 to the cabinet door outer frame 101, that is, the height of the mounting protruding strip H can be changed. Another example is that the thickness of the first matching portion 20101 and the thickness of the second matching portion 20102 can be changed. In this way, when the door leaf 2 is closed, both the first matching portion 20101 and the second matching portion 20102 can be compressed, thereby compensating for the extrusion-type variable error of the first matching portion 20101 and the second matching portion 201012 in the closed and sealed state, thereby achieving simultaneous sealing of the two sealing portions and enhancing the sealing effect of the cabinet body 1.

[0178] Depending on the actual application scenario of the power storage cabinet 100, the preset threshold can be set within an allowable value range to absorb the elastic deformation error of the sealing structure by utilizing the size difference between each connecting portion and the mating portion. For example, the preset threshold can be set to 0, that is, h1 and h2 are equal.

[0179] Please refer to Figures 3 and 6. According to some embodiments of the present application, the power storage cabinet 100 also includes a hinge assembly 4; the hinge assembly 4 includes a movable hinge 401 provided on one of the door leaf outer frame 201 and the cabinet door outer frame 101, and a static hinge 402 provided on the other of the door leaf outer frame 201 and the cabinet door outer frame 101; the hinge end of the movable hinge 401 is connected to the hinge end of the static hinge 402 through a hinge shaft 403.

[0180] In the technical solution of this embodiment, a hinge assembly 4 is provided between the cabinet body 1 and the door leaf 2, and the hinge end of the movable hinge 401 is hingedly connected to the hinge end of the static hinge 402 through a hinge shaft 403, thereby utilizing the hinge structure to realize a hinge connection between the door leaf 2 and the cabinet door, thereby improving the connection stability between the cabinet body 1 and the door leaf 2, thereby improving the airtightness of the cabinet body 1.

[0181] Please refer to Figures 3 and 6. According to some embodiments of the present application, the non-hinge end of the movable hinge 401 and the non-hinge end of the static hinge 402 are locked by a locking assembly; the locking assembly includes a locking member 404 provided on one of the movable hinge 401 and the static hinge 402, and a locking hole 405 provided on the other of the movable hinge 401 and the static hinge 402 and corresponding to the locking member 404.

[0182] For high-voltage cabinets, since the air pressure inside the cabinet 1 is higher than the air pressure outside the cabinet 1, the door leaf 2 is prone to deformation and displacement due to the pressure difference, causing the dynamic hinge 401 in the hinge structure to displace toward the static hinge 402, thereby rotating the hinge shaft 403, and creating a gap between the door leaf 2 and the cabinet 1. This gap will affect the air tightness of the power storage cabinet 100.

[0183] In light of this, this embodiment incorporates locking assemblies at the non-hinged ends of the movable hinge 401 and the stationary hinge 402, locking the movable hinge 401 and the stationary hinge 402 together. The locking assemblies force the end of the hinge shaft 403 past a stop within the locking assemblies. When the hinges are closed, the locking assemblies limit the movable hinge 401, minimizing the slight gap between the door leaf 2 and the cabinet body 1 caused by the rotation of the hinge shaft 403, thereby effectively ensuring an airtight seal.

[0184] To facilitate repeated door opening and maintenance, in some embodiments, the locking member 404 can be a screw, and the locking hole 405 can be a threaded hole. The screw is inserted into the threaded hole to fix the locking hinge structure, prevent the hinge from loosening, and better ensure the sealing effect.

[0185] Please refer to Figures 3 and 6. According to some embodiments of the present application, the static hinge 402 is provided with a limiting step G, which is used to constrain the locking member 404. The locking hole 405 is provided on the surface of the limiting step G.

[0186] In the embodiment of the present application, the lock hole 405 is arranged on the limiting step G, and the height of the limiting step G is used to control the depth of the locking member 404 screwed into the static hinge 402, so as to improve the assembly air tightness of the door leaf 2 and the cabinet body 1.

[0187] Please refer to FIG. 6 . According to some embodiments of the present application, along the axial direction of the hinge axis 403 , a locking member 404 and a locking hole 405 are centrally disposed on the movable hinge 401 and the static hinge 402 , respectively.

[0188] The locking member 404 can be positioned anywhere within the hinge structure as needed. For example, since the locking member 404 is easily obstructed by the wall of the locking hole 405 during the locking and unlocking process, the locking member 404 can be positioned on the movable hinge 401, while the locking hole 405 is positioned on the static hinge 402, to facilitate flexible locking and unlocking of the locking member 404. Furthermore, to ensure balanced force distribution, the locking member 404 is preferably positioned centrally between the movable hinge 401 and the static hinge 402.

[0189] Referring to FIG. 3 and FIG. 7 , according to some embodiments of the present application, the power storage cabinet 100 further includes a door support assembly 6 , and the door support assembly 6 includes a door support body 601 disposed at the bottom of the cabinet door frame 101 .

[0190] After long-term use, the door leaf 2 is displaced relative to the cabinet body 1 of the power storage cabinet 100, the door leaf 2 becomes loose and falls, and the sealing effect is reduced. Long-term use may even cause a safety accident risk.

[0191] The door support assembly 6 of this embodiment includes a door support body 601, and the door support body 601 is connected to the bottom of the cabinet door outer frame 101 of the power storage cabinet 100. The upper surface of the door support body 601 is provided with a supporting surface. When the door leaf 2 is normally closed, the height of the supporting surface can be equal to or slightly higher than the height of the lower surface of the door leaf 2 at the bottom. When the door leaf 2 is in a closed state, the lower surface of the door leaf 2 contacts the supporting surface of the door support body 601, so that the door support body 601 provides an upward supporting force for the door leaf 2, and the door support body 601 supports the door leaf 2 upward. With the above technical solution, by arranging the door support assembly 6 on the power storage cabinet 100, when the door leaf 2 is closed, the door support body 601 can be used to support the door leaf 2, so that the door leaf 2 can be in a normally closed state, effectively solving the problem of the door leaf 2 becoming loose and sagging after long-term use.

[0192] Please refer to FIG. 7 and FIG. 8 . According to some embodiments of the present application, the door support assembly 6 may further include a roller assembly 602 disposed at the bottom of the door leaf outer frame 201 .

[0193] In this embodiment, the roller assembly 602 is used in conjunction with the door support body 601. With the help of the roller assembly 602, the door leaf 2 can be opened and closed easily and conveniently.

[0194] Please refer to FIG. 8 . According to some embodiments of the present application, the door support is provided with an inclined surface 603 for assisting the rolling of the roller assembly 602 . The inclined surface 603 is adjacent to the upper surface of the door support body 601 .

[0195] During the door closing process, the roller assembly 602 at the bottom of the door leaf 2 first contacts the bottom of the inclined surface 603 , and then slides up along the inclined surface 603 to the supporting surface of the door support body 601 until the door leaf 2 is supported on the door support body 601 .

[0196] With the aid of the inclined surface 603 , the auxiliary roller assembly 602 can roll smoothly, thereby achieving fast and smooth door opening and closing.

[0197] 3 and 9 , according to some embodiments of the present application, the power storage cabinet 100 further includes a fixing assembly 7 ; the fixing assembly 7 includes a bolt assembly 701 disposed on the cabinet door outer frame 101 , and a limiting member 702 disposed on the door leaf outer frame 201 and cooperating with the bolt assembly 701 .

[0198] To improve the sealing effect, this embodiment adds a fixing assembly 7 to the cabinet door outer frame 101 and the door leaf outer frame 201 of the power storage cabinet 100. Specifically, when the door leaf 2 is in the closed state, this embodiment can coordinately control the extrusion deformation degree of the first connecting portion 10101 and the first matching portion 20101, and the extrusion deformation degree of the second connecting portion 10102 and the second matching portion 20102 by adjusting the depth of the screw assembly 701 screwed into the cabinet body 1, so that the door leaf outer frame 201 and the cabinet door outer frame 101 are roughly parallel. By matching the limit member 702 with the bolt assembly 701, the door leaf 2 is locked and fixed to the cabinet body 1.

[0199] Thus, the stopper 702 cooperates with the bolt assembly 701 to adjust the various sealing structures of the power storage cabinet 100, thereby achieving a more optimal airtightness of the power storage cabinet 100. It is worth noting that the bolt assembly 701 should not be tightened too loosely or too tightly, and must ensure that the door leaf outer frame 201 and the cabinet door outer frame 101 are approximately parallel in the sealed state.

[0200] In some embodiments, the bolt assembly 701 and the limiting member 702 can be mounted on the door leaf outer frame 201 / cabinet door outer frame 101 via mechanical connection methods such as welding and riveting. Furthermore, in this embodiment, the fixing assembly 7 can also be used to limit and fix the door leaf 2, so that when the power storage cabinet 100 is sealed, the door leaf 2 and the cabinet door are locked on all sides. This prevents the door leaf 2 from loosening due to impact forces, improves the explosion-proof capability of the door leaf 2, and further ensures the airtight reliability of the power storage cabinet 100. Referring to Figures 9 and 10, according to some embodiments of the present application, the bolt assembly 701 includes a swing bolt 70101 and a fixing nut 70102.

[0201] In this embodiment, the swing bolt 70101 is rotatable and is used in conjunction with the fixing nut 70102 to fix the door leaf 2. The swing bolt 70101 is easy and convenient to install, which reduces the difficulty of airtight assembly of the power storage cabinet 100.

[0202] In some embodiments, a movable bolt 70101 with higher thread accuracy can be used as an accessory to improve the overall airtightness and fixing effect of the power storage cabinet 100.

[0203] The installation of the fixing assembly 7 does not require any changes to the cabinet door structure of the cabinet body 1. The fixing assembly 7 can be adapted to industry standard dimensions and conforms to the dimensions of standard products of the power storage cabinet 100 to ensure product versatility. In some embodiments, the movable bolts can be standard parts.

[0204] Please refer to Figures 9 and 10. According to some embodiments of the present application, the limiting member 702 includes a flat plate. The end of the flat plate away from the door leaf 2 is provided with a recessed portion N, and the recessed portion N is used to accommodate the movable bolt 70101.

[0205] In this embodiment, one end of the swing bolt 70101 is fixed to the cabinet body 1, for example, to the cabinet door frame 101. When the door leaf 2 is closed, the swing bolt 70101 is rotated to move the other end of the swing bolt 70101 into the recess N of the stopper 702. The fixing nut 70102 is then screwed onto the other end until the fixing nut 70102 abuts against the stopper 702, thereby tightening the swing bolt 70101 with the fixing nut 70102.

[0206] The recessed portion N is used to limit the displacement and shaking of the movable bolt 70101 in a direction parallel to the plane of the cabinet door, so as to improve the assembly stability of the bolt assembly 701 and the limiting member 702, thereby improving the sealing and airtightness of the cabinet body 1.

[0207] In some embodiments, the bolt assembly 701 further includes a bolt mounting bracket 70103 , which is used to mount the swing bolt 70101 to the cabinet 1 .

[0208] In this embodiment, with the help of the bolt mounting bracket 70103, the bolt assembly 701 can be installed on the cabinet body 1. When the door leaf 2 needs to be closed, the door leaf 2 can be locked and fixed by gently turning the bolt, thereby improving the overall assembly flexibility of the power storage cabinet 100.

[0209] In some embodiments, the bolt assembly 701 further includes a pin 70104, which is inserted into the bolt mounting bracket 70103. The pin 70104 is used to pivotally connect the swing bolt 70101 to the bolt mounting bracket 70103, and the bolt mounting bracket 70103 is then secured to the cabinet door frame 101. Thus, the door leaf 2 is locked to the cabinet door using the securing assembly 7.

[0210] In some embodiments, the bolt assembly 701 further includes a stopper 70105. The pin 70104 is inserted into the bolt mounting bracket 70103, and the stopper 70105 is located at the end of the pin 70104. The stopper 70105 limits the rotation of the pin 70104, thereby improving the assembly stability of the bolt assembly 701 and the stopper 702, and further enhancing the airtightness of the power storage cabinet 100. In some embodiments, the bolt mounting bracket 70103 is composed of three plate-like members, each of which encloses a housing cavity S, which provides a rotational space for the swing bolt 70101.

[0211] In some embodiments, the limit member 702 is welded to the edge of the door leaf 2, the bolt mounting bracket 70103 is welded to the edge of the cabinet door, and one end of the movable bolt 70101 is rotatably connected to the bolt mounting bracket 70103 through the pin 70104, so that with the help of the bolt mounting bracket 70103, the end of the movable bolt 70101 is firmly mounted to the cabinet door, thereby improving the airtight assembly flexibility of the power storage cabinet 100.

[0212] Please refer to Figure 3. According to some embodiments of the present application, there are multiple fixing components 7, and the bolt components 701 are evenly distributed on the periphery of the cabinet door frame 101, and the limiting members 702 are evenly distributed on the periphery of the door frame 201.

[0213] This embodiment achieves multi-point locking of the cabinet body 1 by providing multiple fixing assemblies 7 at intervals around the cabinet door. Each bolt assembly 701 interlocks with a corresponding stopper 702. The multiple, spaced fixing assemblies 7 provide a more balanced force distribution on the cabinet door, allowing the power storage cabinet 100 to evenly withstand pressure, thereby absorbing greater impact forces and improving the reliability of the cabinet door locking.

[0214] Depending on actual needs, the arrangement of the stoppers 702 and the swing bolts 70101 can be flexibly designed to be located around the cabinet door periphery. In some embodiments, the bolt assemblies 701 are symmetrically distributed along the upper and lower edges of the cabinet door frame 101. When the left edge of the cabinet door frame 101 is located on the side where the static hinge 402 of the hinge assembly 4 is located, multiple bolt assemblies 701 are evenly distributed along the right edge of the cabinet door frame 101.

[0215] According to some embodiments of the present application, the door leaf outer frame 201 and / or the cabinet door outer frame 101 is an integrated sheet metal structure that has been bent multiple times.

[0216] In this embodiment, the cabinet door frame 101 or the door leaf frame 201 can be formed from a single sheet of metal through stamping or rolling and multiple bending. For example, the frame cross-section is a closed quadrilateral frame, and the first, second, and third folds, as well as the first limiting protrusion, are all solid structures. This ensures that the door leaf frame 201 and / or the cabinet door frame 101 of the power storage cabinet 100 have high strength and a more stable structure, making them less susceptible to deformation when subjected to external forces. Furthermore, the sheet metal structural components are made of metal, integrally formed, and have a uniform thickness, which improves the cabinet 1's internal electromagnetic interference resistance in high-voltage and strong magnetic environments.

[0217] In some embodiments, the air pressure inside the cabinet 1 is greater than the air pressure outside the cabinet 1 .

[0218] To improve the flame retardancy of the power storage cabinet 100, nitrogen or other inert gases are often filled inside the cabinet 100. In this embodiment, the cabinet pressure is set to be greater than the external pressure to reduce the ingress of external air into the cabinet and facilitate the outflow of internal gas to the outside of the cabinet 1, thereby reducing the content of combustion-supporting gas inside the cabinet and providing a flame retardant environment inside the cabinet.

[0219] Exemplarily, the power storage cabinet 100 is placed in an atmospheric pressure environment, and the air pressure in the cabinet body 1 is 1.5-5 times the standard atmospheric pressure.

[0220] Please refer to FIG. 2 and FIG. 9 . According to some embodiments of the present application, the cabinet 1 includes a gas pipeline connection port 5 .

[0221] The power storage cabinet 100 often fails to meet user requirements for airtightness due to structural processing errors during manufacturing, or the seal of the power storage cabinet 100 fails after long-term use. To facilitate gas exchange within the cabinet, in some embodiments, a gas pipeline connection port 5 is provided at the bottom of the cabinet body 1, and an air outlet 3 is provided at the top of the cabinet body 1. This allows inert gas to be filled into the cabinet body 1 from the bottom and the existing atmosphere in the cabinet to flow out from the top of the cabinet body 1, thereby quickly replacing the air in the cabinet body 1 with nitrogen or other inert gases.

[0222] The embodiment of the present application realizes real-time replacement of the gas inside the cabinet 1, increases the content of inert gas inside the cabinet 1 as much as possible, realizes a reliable dynamic flame-retardant environment inside the cabinet 1, and reduces the possibility of the air inside the cabinet reaching a certain concentration due to trace air entering the cabinet 1, thereby causing the power storage cabinet 100 to explode.

[0223] In some embodiments, the power storage cabinet 100 is a rectangular parallelepiped structure with a length, width and height of 0.6m to 1m; 1m to 1.5m; and 1.5m to 2.5m, respectively.

[0224] In the related art, large-volume power storage cabinets 100 require full welding of the edges of the cabinet body 1. This makes sealing the power storage cabinet 100 difficult due to numerous welds, thin steel plates, and low product consistency. The sealing technology of the embodiments of the present application is applied to such large-scale power storage cabinets 100. For example, for a rectangular power storage cabinet 100 with a length, width, and height of 0.6m to 1m, 1m to 1.5m, and 1.5m to 2.5m, respectively, good airtightness can be achieved for the large power storage cabinet 100. Specifically, the power storage cabinet 100 can be 0.6m, 0.7m, 0.8m, 0.9m, or 1m long; 1m, 1.1m, 1.2m, 1.3m, 1.4m, or 1.5m wide; and 1.5m, 1.6m, 1.7m, 1.8m, 1.9m, 2.0m, 2.1m, 2.2m, 2.3m, 2.4m, or 2.5m high.

[0225] In some embodiments, the cabinet body 1 includes but is not limited to being a hexahedron, and may also be a cylindrical cabinet, a prismatic cabinet, etc. The door leaf 2 includes but is not limited to being opened and closed from the side, and may also be opened and closed from the top and bottom.

[0226] This solution overcomes the problem that traditional large-scale power storage cabinets require fireproof cotton to be pasted on the inner wall of the cabinet body 1 to achieve fire safety. It also solves the problem that traditional large-scale power storage cabinets are limited by the bending accuracy of the door leaf outer frame 201 and the cabinet door outer frame 101, and the fitting clearance between the door leaf 2 and the cabinet door is difficult to control within the expected range, resulting in great difficulty in sealing the connection between the door leaf 2 and the cabinet door, and the overall air tightness of the power storage cabinet 100 is difficult to achieve the expected expected level.

[0227] In some embodiments, at least one battery pack box group is placed in the power storage cabinet 100.

[0228] In the embodiment of the present application, the power storage cabinet 100 may include but is not limited to a cabinet-type energy storage device 1000 having a storage space, and one or more electrical boxes may be placed in the storage space.

[0229] The sealing technology for the power storage cabinet 100 of the embodiments of the present application is particularly suitable for sealing large power storage cabinets 100, such as a cabinet-type energy storage device 1000 containing 3 to 8 electrical boxes. Because such energy storage devices 1000 have highly concentrated internal energy, the sealing technology of the embodiments of the present application, such as the use of a double-layer wire seal between the cabinet body 1 and the door leaf 2, can effectively seal such large, high-energy power storage cabinets 100. Specifically, the number of electrical boxes can be 3, 4, 5, 6, 7, 8, and so on.

[0230] Example 1

[0231] Please refer to Figures 2, 3 and 11. The power storage cabinet 100 includes a cabinet body 1 and a door leaf 2. The power storage cabinet 100 is a rectangular parallelepiped structure with a length, width and height of 1m*1.5m*2.5m respectively. The cabinet body 1 has a cabinet door outer frame 101, and the door leaf 2 includes a door leaf 2 main body composed of a skin 204, a door leaf outer frame 201, a longitudinal beam 202 and a plurality of cross beams 203. The cooperation of the cross beams 203 and the longitudinal beams 202 in this embodiment ensures the overall high strength of the door leaf 2 and good workability. The cabinet door outer frame 101 is sealed and connected to the door leaf outer frame 201. Among them, the door leaf outer frame 201 has two sealing strip installation planes, which are used to stick the inner ring sealing strip as the first matching part 20101 and the outer ring sealing strip as the second matching part 20102. The inner ring sealing strip is rectangular and the outer ring sealing strip is semicircular. Several limiters 702 and movable hinges 401 are welded around the main body of the door leaf 2 for installing the door leaf 2 and the cabinet body 1. With the help of the limiters 702 and the bolt assembly 701, the door leaf 2 is installed on the cabinet body 1 to ensure the airtight assembly of the door leaf 2 and the cabinet door.

[0232] Specifically, at the inner edge of the cabinet door outer frame 101 and along the circumference of the cabinet door outer frame 101, the cabinet door outer frame 101 has a first sealing ridge; at the inner edge of the door leaf outer frame 201 and along the circumference of the door leaf outer frame 201, the door leaf outer frame 201 has a first sealing surface; the first sealing ridge can be embedded in the first sealing surface to achieve a linear surface seal between the first sealing ridge and the first sealing surface.

[0233] At the outer edge of the cabinet door frame 101 and along the circumference of the cabinet door frame 101, the cabinet door frame 101 has a first mating surface; the first sealing ridge and the first mating surface are arranged at intervals along the first direction X, and the first direction X is parallel to the cabinet door frame 101 and points from the inside of the cabinet body 1 to the outside of the cabinet body 1.

[0234] The door leaf outer frame 201 has a second mating surface at the outer edge of the door leaf outer frame 201 and along the circumference of the door leaf outer frame 201; the first mating surface is in sealing contact with the second mating surface to achieve airtight assembly between the first mating surface and the second mating surface.

[0235] The first sealing ridge is formed based on the surface of the cabinet door outer frame 101 and protrudes along the circumference of the cabinet door outer frame 101 in the direction toward the door leaf outer frame 201. The first sealing surface is a sealing ring with a square cross-section. The first mating surface is a portion of the cabinet door outer frame 101. The second mating surface is a sealing ring with an arc-shaped cross-section. The curved edge of the second mating surface is in sealing contact with the straight edge of the first mating surface. The first sealing ridge has a folded portion M that is bent once along a second direction Y. The second direction Y is arranged at an angle to the first direction X.

[0236] The cabinet door outer frame 101 is provided with a movable hinge 401, and the door leaf outer frame 201 is provided with a static hinge 402; the hinged end of the movable hinge 401 and the hinged end of the static hinge 402 are connected by a hinge shaft 403; the non-hinged end of the movable hinge 401 is provided with a locking piece 404, and the non-hinged end of the static hinge 402 is provided with a locking hole 405, and the locking piece 404 is inserted into the locking hole 405 to lock the movable hinge 401 and the static hinge 402; the end of the hinge shaft 403 is also provided with an open retaining ring 406, so as to limit the rotation of the hinge shaft 403 with the help of the open retaining ring 406.

[0237] The power storage cabinet 100 also includes a door support assembly 6, which includes a door support body 601 provided at the bottom of the cabinet door outer frame 101, and a roller assembly 602 provided at the bottom of the door leaf outer frame 201; the door support body 601 is provided with an inclined surface 603; wherein the roller assembly 602 includes a roller bracket 60201, a roller 60202, and an axle pin 60203. When the door leaf 2 is closed, with the help of the inclined surface 603 and the supporting surface of the door support body 601, the roller assembly 602 rolls in contact with the inclined surface 603 and the supporting surface of the door support body 601 in turn. After the door leaf 2 is closed, the roller 60202 abuts against the supporting surface of the door support body 601, so that the door support body 601 supports the door leaf 2. In this technical solution, with the help of the roller assembly 602, the door leaf 2 can be opened and closed easily and conveniently.

[0238] The power storage cabinet 100 also includes a plurality of fixing assemblies 7, each of which includes a bolt assembly 701 disposed on the cabinet door outer frame 101 and a stopper 702 disposed on the door leaf outer frame 201; the bolt assembly 701 cooperates with the stopper 702. The bolt assembly 701 includes a pivot bolt 70101, and the stopper 702 includes a flat plate having a recessed portion N at one end away from the door leaf 2, the recessed portion N being used to accommodate the pivot bolt 70101. The bolt assembly 701 also includes a bolt mounting bracket 70103, a pin 70104, a fixing nut 70102, and a stopper 70105. The bolt mounting bracket 70103 is composed of three plate-like members, each of which encloses a receiving chamber S, which provides a rotatable space for the pivot bolt 70101. The stopper 702 is welded to the edge of the door leaf 2, the bolt mounting bracket 70103 is welded to the edge of the cabinet door, the pin 70104 is inserted into the bolt mounting bracket 70103, and the stopper 70105 is disposed at the end of the pin 70104. One end of the swing bolt 70101 is rotatably connected to the bolt mounting bracket 70103 via the pin 70104, thereby securing the end of the swing bolt 70101 to the cabinet door via the bolt mounting bracket 70103. When the door leaf 2 is closed, the swing bolt 70101 is rotated to move the other end of the swing bolt 70101 into the recess N of the stopper 702. The fixing nut 70102 is then screwed onto the other end until the fixing nut 70102 abuts the stopper 702. The stopper 70105 limits the rotation of the pin 70104, thereby completing the mating installation of the bolt assembly 701 and the stopper 70102. Thus, the door leaf 2 is locked on the cabinet door by means of the fixing assembly 7 .

[0239] The door leaf outer frame 201 and the cabinet door outer frame 101 are integral sheet metal structures that are bent seven times.

[0240] The air pressure inside the cabinet 1 is greater than the air pressure outside the cabinet 1 .

[0241] A gas pipeline connection port 5 is provided at the bottom of the cabinet 1 , and a gas outlet 3 is provided at the top of the cabinet 1 .

[0242] The large-scale electricity storage cabinet 100 of the present embodiment 1 requires the use of the above sealing technology to ensure that the cabinet body 1 has good airtightness, thereby fundamentally solving the problem of the large-scale electricity storage cabinet 100 having a serious fire hazard.

[0243] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A power storage cabinet, The power storage cabinet includes a cabinet body and a door leaf, the cabinet body has a cabinet door outer frame, the door leaf has a door leaf outer frame, the cabinet door outer frame has a first connecting portion arranged along the circumference of the cabinet door outer frame, the door leaf outer frame has a first matching portion arranged along the circumference of the door leaf outer frame, and the first connecting portion and the first matching portion are line-surface sealed.

2. The power storage cabinet according to claim 1, wherein: One of the first connecting portion and the first matching portion is a first sealing convex strip, and the other of the first connecting portion and the first matching portion is a first sealing surface.

3. The power storage cabinet according to claim 2, wherein: The first sealing convex strip has an embedded portion, and the first sealing surface has an elastic deformation portion, and the embedded portion and the elastic deformation portion can be embedded and matched.

4. The power storage cabinet according to any one of claims 1 to 3, wherein: The cabinet door outer frame has a second connection portion arranged along the circumference of the cabinet door outer frame, and the second connection portion is arranged around the outer side of the first connection portion; The door leaf outer frame has a second matching portion arranged along the circumference of the door leaf outer frame, and the second matching portion is arranged around the outer side of the first matching portion; The second connecting portion is sealingly connected to the second matching portion.

5. The power storage cabinet according to claim 4, wherein: One of the second connecting portion and the second matching portion is a second sealing convex strip, the other of the second connecting portion and the second matching portion is a second sealing surface, and the second sealing convex strip is in sealing contact with the second sealing surface to achieve line-surface sealing.

6. The power storage cabinet according to claim 4, wherein: The first connecting portion is a first sealing convex strip, and the first matching portion is a first sealing surface; The second connecting portion is a first matching surface, and the second matching portion is a second matching surface.

7. The power storage cabinet according to any one of claims 4 to 6, wherein: The first connection portion is arranged at the inner edge of the cabinet door outer frame, and the second connection portion is arranged at the outer edge of the cabinet door outer frame.

8. The power storage cabinet according to any one of claims 4 to 7, wherein: The first matching portion is a sealing ring with a square cross section; the second connecting portion is a part of the surface of the cabinet door outer frame, and the second matching portion is a sealing ring with an arc-shaped cross section.

9. The power storage cabinet according to any one of claims 6 to 8, wherein: At least one of the first sealing surface, the first mating surface or the second mating surface is a part of the surface of the cabinet door frame; and / or, at least one of the first sealing surface, the first mating surface or the second mating surface is a part of the surface of the door frame.

10. The power storage cabinet according to any one of claims 1 to 9, wherein: The first connection portion is formed to protrude in a direction toward the door leaf outer frame based on a surface of the cabinet door outer frame along a circumferential direction of the cabinet door outer frame.

11. The power storage cabinet according to any one of claims 4 to 9, wherein: The second connection portion is formed to protrude from a surface of the door leaf outer frame along a circumferential direction of the door leaf outer frame in a direction toward the cabinet door outer frame.

12. The power storage cabinet according to any one of claims 2 to 3 or 6, wherein: The first sealing convex strip includes a convex strip body and a folded portion formed by bending the convex strip body in a direction away from the door leaf.

13. The power storage cabinet according to claim 12, wherein: The door leaf outer frame has a mounting boss for placing the second matching portion; Along the protruding direction of the mounting boss, the sum of the size x of the convex strip body and the size y of the first matching portion is h1, and the sum of the size of the mounting boss and the size of the second matching portion is h2; The difference between the h1 and the h2 is smaller than a preset threshold.

14. The power storage cabinet according to any one of claims 1 to 13, wherein: The power storage cabinet also includes a hinge assembly; the hinge assembly includes a movable hinge arranged on one of the door leaf outer frame and the cabinet door outer frame, and a static hinge arranged on the other of the door leaf outer frame and the cabinet door outer frame; the hinge end of the movable hinge is connected to the hinge end of the static hinge through a hinge shaft.

15. The power storage cabinet according to claim 14, wherein: The non-hinged end of the movable hinge and the non-hinged end of the static hinge are locked by a locking assembly, and the locking assembly includes a locking piece provided on one of the movable hinge and the static hinge, and a locking hole provided on the other of the movable hinge and the static hinge and corresponding to the locking piece.

16. The power storage cabinet according to claim 15, wherein: The static hinge is provided with a limiting step, and the locking hole is arranged on the surface of the limiting step.

17. The power storage cabinet according to claim 15, wherein: Along the axial direction of the hinge shaft, the locking member and the locking hole are centrally arranged on the movable hinge and the static hinge respectively.

18. The power storage cabinet according to any one of claims 1 to 17, wherein: The power storage cabinet further comprises a door support assembly, and the door support assembly comprises a door support body arranged at the bottom of the cabinet door outer frame.

19. The power storage cabinet according to claim 18, wherein: The door support assembly also includes a roller assembly arranged at the bottom of the door leaf outer frame.

20. The power storage cabinet according to claim 19, wherein: The door support body is provided with an inclined surface for assisting the rolling of the roller assembly, and the inclined surface is adjacent to the upper surface of the door support body.

21. The power storage cabinet according to any one of claims 1 to 20, wherein: The power storage cabinet further comprises a fixing assembly; the fixing assembly comprises a bolt assembly arranged on the cabinet door outer frame, and a limiting member arranged on the door leaf outer frame and cooperating with the bolt assembly.

22. The power storage cabinet according to claim 21, wherein: The bolt assembly includes a swing bolt and a fixing nut.

23. The power storage cabinet according to claim 21, wherein: The limiting member comprises a flat plate, and a recessed portion is provided at one end of the flat plate away from the door leaf, and the recessed portion is used to accommodate the movable bolt.

24. The power storage cabinet according to any one of claims 21 to 23, wherein: There are multiple fixing components, and the bolt components are distributed at equal intervals on the periphery of the cabinet door outer frame, and the limiting members are distributed at equal intervals on the periphery of the door leaf outer frame.

25. The power storage cabinet according to any one of claims 1 to 24, wherein: The door leaf outer frame and / or the cabinet door outer frame is an integrated sheet metal structural member that is bent multiple times.

26. The power storage cabinet according to any one of claims 1 to 25, wherein: The cabinet is provided with a gas pipeline connection port.

27. An energy storage device, comprising the power storage cabinet according to any one of claims 1-26.

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