Electricity storage cabinet and energy storage device

Abstract

The invention relates to the field of batteries, and provides an electricity storage cabinet and an energy storage device, the electricity storage cabinet comprises a cabinet body and a door leaf, the cabinet body is provided with a cabinet door outer frame, the door leaf is provided with a door leaf outer frame, and the cabinet door outer frame is in sealing contact with the door leaf outer frame. Compared with a traditional power storage cabinet, the power storage cabinet has the advantages that the door leaf outer frame and the cabinet door outer frame are connected in a sealed mode, airtight assembly of the power storage cabinet is achieved, the possibility of fire and explosion is reduced, fire safety and reliability are improved fundamentally, and the service life of the power storage cabinet is prolonged fundamentally.

Description

Technical Field

[0001] 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

[0002] An energy storage cabinet is a highly concentrated energy storage device formed by placing one or more electrical boxes in the cabinet. Usually, when a thermal runaway occurs in the electrical box, a large amount of high-temperature and high-pressure gas will be generated, which will accumulate in the cabinet of the energy storage cabinet and cause an explosion. Therefore, high safety performance requirements are imposed on the energy storage cabinet.

[0003] Traditional power storage cabinets often use the method of sticking fireproof cotton on the inner wall of the cabinet to achieve fire safety issues. However, a fire in a single power box will cause all the power boxes in the cabinet to burn or even explode, which cannot solve the safety problem from the root. Summary of the invention

[0004] 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.

[0005] To achieve the above purpose, the technical solution adopted in this application is:

[0006] In the first aspect, an embodiment of the present application provides a power storage cabinet comprising 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, 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.

[0007] The embodiment of the present application utilizes line-surface sealing technology to flexibly adapt the gap between the cabinet body and the door leaf of different sizes, so that the gap between the cabinet door and the door leaf can be effectively filled to improve the airtight assembly effect between the cabinet door and the door leaf. The power storage cabinet of the embodiment of the present application achieves a good airtight assembly effect of the power storage cabinet by sealingly connecting the door leaf outer frame and the cabinet door outer frame, reducing the probability of fire and explosion, and fundamentally improving the fire safety reliability and service life.

[0008] 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.

[0009] The embodiment of the present application adopts the matching first sealing convex strip and the first sealing surface to achieve the linear surface sealing of the first connecting part and the first matching part, thereby improving the reliability of the linear surface sealing of the cabinet.

[0010] In some embodiments, the first sealing ridge 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.

[0011] The embodiment of the present application embeds the first sealing ridge into the first sealing surface, which can facilitate the rapid assembly of the sealing surface, has high flexibility, and is easy to disassemble, thereby effectively ensuring installation efficiency.

[0012] 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 outer side 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 outer side of the first matching portion; the second connecting portion is sealed and connected to the second matching portion.

[0013] The embodiment of the present application utilizes the sealing cooperation between the second connecting portion and the second matching portion to improve the sealing reliability of the power storage cabinet.

[0014] 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.

[0015] The embodiment of the present application utilizes double-layer line and surface sealing to further improve the airtightness of the power storage cabinet.

[0016] In some embodiments, 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.

[0017] 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 due to the line-surface sealing, but also reduces the difficulty of processing the sealing convex strip.

[0018] In some embodiments, the first connection portion is disposed on an inner edge of the cabinet door frame, and the second connection portion is disposed on an outer edge of the cabinet door frame.

[0019] In the embodiment of the present application, the sealing convex strip and the matching surface are arranged in sequence on the cabinet door frame or the door leaf frame along the first direction to reduce the difficulty of processing the sealing convex strip.

[0020] 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.

[0021] The embodiment of the present application adopts the arc 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.

[0022] 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.

[0023] 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.

[0024] In some embodiments, the first connection portion is formed to protrude along the circumference of the cabinet door outer frame based on the surface of the cabinet door outer frame in a direction toward the door leaf outer frame.

[0025] 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 can be effectively improved.

[0026] In some embodiments, the second connection portion is formed to protrude in a direction toward the cabinet door outer frame based on a surface of the door leaf outer frame along a circumferential direction of the door leaf outer frame.

[0027] In the embodiment of the present application, since the second connecting portion is integrally manufactured with the door leaf outer frame, the air tightness of the sealing ridge can be effectively improved.

[0028] 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.

[0029] 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.

[0030] In some embodiments, the door leaf outer frame has a mounting boss for placing the second matching 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 matching part is h1, and the sum of the size of the mounting boss and the size of the second matching part is h2; the difference between h1 and h2 is less than a preset threshold.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] This embodiment uses a locking assembly to allow the end of the hinge shaft to pass through the locking assembly limit stop. When the hinge is closed, the locking assembly is used to limit the movable hinge to reduce the small gap between the door leaf and the cabinet body caused by the rotation of the hinge shaft, thereby ensuring an airtight effect.

[0036] In some embodiments, the locking assembly includes a locking member disposed on one of the movable hinge and the static hinge, and a locking hole disposed on the other of the movable hinge and the static hinge and corresponding to the locking member.

[0037] 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.

[0038] 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.

[0039] In the embodiment of the present application, the locking member is arranged on the movable hinge, and the locking hole is arranged on the static hinge, so as to flexibly lock or unlock the locking member. The central position of the locking member improves the force balance.

[0040] 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.

[0041] In the embodiment of the present application, the door support body is used to support the door leaf so that the door leaf can be maintained in a closed state, thereby effectively solving the problem of the door leaf becoming loose and sagging after being used for a long time.

[0042] In some embodiments, the door support assembly further includes a roller assembly disposed at the bottom of the door leaf outer frame.

[0043] In the embodiment of the present application, a roller assembly is used to improve the smoothness of opening and closing the door leaf.

[0044] 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 adjacent to the upper surface of the door support body.

[0045] In the embodiment of the present application, with the aid of the inclined surface, the roller assembly is assisted to roll smoothly on the door support body, thereby achieving fast and smooth opening and closing of the door.

[0046] In some embodiments, the power storage cabinet further includes a fixing assembly; the fixing assembly includes a bolt assembly disposed on the cabinet door outer frame, and a limiting member disposed on the door leaf outer frame and cooperating with the bolt assembly.

[0047] 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 to prevent 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.

[0048] In some embodiments, the bolt assembly includes a swing bolt and a fixing nut.

[0049] In the embodiment of the present application, the difficulty of the overall airtight assembly of the power storage cabinet is reduced by utilizing the easy installation feature of the movable bolt.

[0050] 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.

[0051] 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.

[0052] In some embodiments, the bolt assembly further includes a bolt mounting bracket, and the bolt mounting bracket is used to mount the swing bolt to the cabinet.

[0053] In the embodiment of the present application, the overall assembly flexibility of the power storage cabinet is improved by means of a bolt mounting frame.

[0054] 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.

[0055] In the embodiment of the present application, a plurality of fixing components arranged at intervals make the force on the cabinet door more reasonable, and the power storage cabinet can evenly withstand the pressure, thereby being able to withstand greater impact force, thereby improving the reliability of cabinet door locking.

[0056] In some embodiments, the door leaf frame and / or the cabinet door frame is an integrated sheet metal structure that has been bent multiple times.

[0057] In the embodiment of the present application, an integrated sheet metal structural member that is 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 has higher strength, a more stable structure, and is 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.

[0058] In some embodiments, the air pressure inside the cabinet is greater than the air pressure outside the cabinet.

[0059] 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.

[0060] In some embodiments, the cabinet is provided with a gas pipeline connection port.

[0061] 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 inside the cabinet is achieved.

[0062] In some embodiments, the power storage cabinet is a rectangular structure with a length, width and height of 0.6m to 1m; 1m to 1.5m; 1.5m to 2.5m respectively.

[0063] In the embodiment of the present application, good airtight assembly of a large power storage cabinet is achieved.

[0064] In some embodiments, at least one battery pack box is placed in the power storage cabinet.

[0065] In the embodiment of the present application, the cabinet sealing technology is adopted to achieve good sealing of high-energy and high-voltage large-scale power storage cabinets.

[0066] according to Figure 1 In a second aspect, an embodiment of the present application further provides an energy storage device, comprising the power storage cabinet as described above.

[0067] In the embodiment of the present application, a good airtight assembly with a large energy storage device is achieved.

[0068] 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

[0069] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying creative labor.

[0070] Figure 1 A schematic diagram of the structure of the energy storage device provided in the embodiment of the present application;

[0071] Figure 2 A three-dimensional diagram of a power storage cabinet with the cabinet door closed in some embodiments of the present application;

[0072] Figure 3 A three-dimensional diagram of a power storage cabinet with the cabinet door opened according to some embodiments of the present application;

[0073] Figure 4 It is a partial schematic diagram of a door leaf outer frame and a cabinet door outer frame in a state to be sealed in some embodiments of the present application;

[0074] Figure 5 It is a partial schematic diagram of a door leaf outer frame and a cabinet door outer frame in a sealed state in some embodiments of the present application;

[0075] Figure 6 This is a schematic diagram of the structure of the hinge assembly of some embodiments of the present application;

[0076] Figure 7 This is a schematic diagram of the door support assembly structure of some embodiments of the present application;

[0077] Figure 8 Schematic diagram of the door support assembly structure of other embodiments of the present application;

[0078] Fig. 9 This is a schematic diagram of the structure of the fixing components of some embodiments of the present application;

[0079] Fig.10 This is a schematic diagram of the bolt assembly structure of some embodiments of the present application;

[0080] Fig.11 This is a schematic diagram of the structure of the door panel assembly of Example 1 of the present application;

[0081] Among them, the reference numerals in the figure are:

[0082] 1000. Energy storage device; 100. Power storage cabinet;

[0083] 1. Cabinet body; 2. Door leaf; 3. Air outlet; 4. Hinge assembly; 5. Gas pipeline connection port; 6. Door support assembly; 7. Fixing assembly; 101. Cabinet door frame; 201. Door leaf frame; 202. Longitudinal beam; 203. Crossbeam; 204. Skin; 401. Moving 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 portion; 20101, first matching portion; 10102, second connecting portion; 20102, second matching portion; 60201, roller bracket; 60202, roller; 60203, axle pin; 70101, living bolt; 70102, fixing nut; 70103, bolt mounting bracket; 70104, pin; 70105, stopper; M, folding portion; T, convex strip body; H, mounting boss; N, recessed portion; S, accommodating cavity; G, limiting step. DETAILED DESCRIPTION

[0084] Embodiments of the present application are described in detail below, and examples of the embodiments 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.

[0085] In the description of the present 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 the present 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 should not be understood as a limitation on the present application.

[0086] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0087] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0088] At present, with the vigorous development of new energy, the use of new energy power batteries is increasing. New energy batteries have the advantages of high cost performance, good safety, low pollution, etc., and have been more and more widely used, not only in the field of general electronics, but also gradually in the field of power and energy storage. Power batteries are not only used in energy storage power supply systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding. As the core component of new energy power devices, the safety of power batteries directly affects the safety performance of power devices.

[0089] A power storage cabinet is a highly concentrated energy storage device formed by placing one or more battery pack boxes (hereinafter referred to as power boxes) in the cabinet. Since the voltage of the power box inside the cabinet is high, when the power box has thermal runaway, a large amount of high-temperature and high-pressure gas will be generated, which will accumulate in the cabinet of the power storage cabinet and cause an explosion. For this reason, the power storage cabinet is often filled with nitrogen to reduce the fire safety hazards caused by thermal runaway of the power box inside the cabinet.

[0090] The structure of the power storage cabinet consists of a cabinet body and door leaves. The relevant technology often only considers the connection method of the cabinet body and the door leaves, and does not consider the detailed sealing solution. Especially for large power storage cabinets, the matching clearance between the cabinet body and the door leaves is difficult to control to the expected range, and the installation air tightness between the cabinet body and the door leaves of the power storage cabinet is often difficult to guarantee. Due to the poor air tightness of the power storage cabinet, a large amount of nitrogen inside the cabinet leaks to the outside of the cabinet, and the air in the environment outside the cabinet flows into the power storage cabinet. In the case of thermal runaway of the electric box, the reduction of nitrogen inside the cabinet and the newly mixed external air make the electric box easy to catch fire and cause safety accidents. In addition, due to the poor sealing of the power storage cabinet, the high-temperature and high-pressure gas in the cabinet is easy to spread outward, and the fire in the cabinet spreads to the outside of the cabinet, causing the power storage cabinet to increase the safety hazards of the electrical device. Therefore, the safety performance of the electrical device puts forward strict requirements on the air tightness of the power storage cabinet.

[0091] In order to improve the overall safety of electrical devices, in some related technologies, in the full welding process of the edges of the power storage cabinet, the tower edge welding method is adopted, and the matching gap between the cabinet and the door leaf is reduced, and the structural strength can be greatly improved. However, due to the large number of welds and thin steel plates, it is very difficult to improve the airtightness of the cabinet. The cabinet is still not airtight, and the product consistency is not high. Some related technologies also use additional supporting sealing equipment and inspection equipment to reduce the gap between the cabinet and the door leaf. This type of technology increases the technical difficulty and processing cost of large power storage cabinets, and has poor practical applicability. For large power storage cabinets, due to the large cabinet body, it is often difficult for related technologies to achieve good airtightness, and there are greater fire safety hazards. In some related technologies, large power storage cabinets use fireproof cotton to paste on the inner wall of the cabinet to achieve fire safety issues, but a single battery cell fire will cause all the batteries in the cabinet to burn or even explode, and it is impossible to solve the fire and explosion problems of the power storage cabinet from the root. In the related technology, the sealing of the power storage cabinet is difficult to achieve the expected effect.

[0092] To solve the above problems, the embodiment of the present application designs an electric storage cabinet, which reduces the probability of fire and explosion by sealing the door leaf outer frame and the cabinet door outer frame, thereby fundamentally improving the fire safety reliability. Compared with the traditional electric storage cabinet structure, the embodiment of the present application realizes the airtight assembly of the electric storage cabinet, thereby fundamentally improving the fire safety reliability and service life of the electric storage cabinet.

[0093] Of course, it is particularly important to emphasize that the cabinet sealing technology of the present application includes but is not limited to being used in power storage cabinets, and can also be used for other cabinet devices in high temperature and high pressure environments inside the cabinet, for example, it can also be used in distribution cabinets, junction cabinets, etc.

[0094] The embodiment of the present application provides an energy storage device using a power storage cabinet as a power source, and the energy storage device may be, but is not limited to, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0095] In the embodiment of the present application, the power storage cabinet may include but is not limited to a cabinet-type energy storage device with a storage space, in which one or more electric boxes (full name: battery pack box) may be placed, wherein the electric box is used to provide electric energy for the power storage cabinet. In the embodiment of the present application, the electric box is composed of at least one battery pack.

[0096] The following further explains the relevant concepts of the embodiments of the present application.

[0097] Cell: refers to the smallest functional unit of a single electrochemical battery containing positive and negative electrodes. It is generally not used directly. Unlike batteries, which contain protection circuits and shells and can be used directly, it must have a high energy density to store as much electrical energy as possible. In addition, the life of the cell is also the most critical factor. Any damage to a cell will lead to damage to the entire battery pack.

[0098] Battery module: When multiple battery cells are packaged together in the same outer shell frame and connected to the outside through a unified boundary, this forms a module.

[0099] Battery pack: When several modules are controlled or managed together by the BMS and thermal management system, the unified whole is called a battery pack.

[0100] The difference between battery cells, modules and battery packs, in addition to the number of batteries, also lies in whether there is an additional management system.

[0101] See also Figure 1 In a first aspect, an embodiment of the present application provides an energy storage device, including a power storage cabinet.

[0102] The energy storage device of the embodiment of the present application has a good airtight effect, which improves the fire safety performance of the energy storage device.

[0103] In some embodiments, the energy storage device also includes a controller, a fire-fighting medium source, a cooling medium source, etc., which are respectively connected to the power storage cabinet through wire holes and inlets and outlets.

[0104] See also Figure 2-Figure 5 The embodiment of the present application provides a power storage cabinet, 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 is in sealing contact with the door leaf outer frame 201; the cabinet door outer frame 101 has a first connecting portion 10101 arranged along the circumference of the cabinet door outer frame 101, the door leaf outer frame 201 has a first matching portion 10102 arranged along the circumference of the door leaf outer frame 201, and the first connecting portion 10101 and the first matching portion 20101 are line-surface sealed.

[0105] It is worth noting that in the technical solution of the embodiment of the present application, the sealed contact between the cabinet door frame 101 and the door leaf frame 201 can be achieved in a variety of ways.

[0106] 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, and the seal is clamped in the gap between the cabinet door outer frame 101 and the door leaf outer frame 201, and the cabinet door outer frame 101 and / or the door leaf outer frame 201 press the seal toward the other one, thereby achieving 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.

[0107] Exemplarily, the sealing member may include, but is not limited to, a rubber strip, a rubber ring, an elastic gasket, etc., which are sleeved on the cabinet door frame 101 or the door leaf frame 201 .

[0108] 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, the sealing structures used in conjunction with each other are integrally arranged, 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 pressed against each other, and the sealing structure after the pressing and installation fills the gap between the cabinet door outer frame 101 and the door leaf outer frame 201, thereby realizing the airtight assembly of the cabinet door outer frame 101 and the door leaf outer frame 201.

[0109] 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, the elastic protruding structural member extends into the sealing groove, and 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.

[0110] Wherein, along the circumference of the door frame 101 or the door leaf 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 convexly arranged on the door leaf frame 201 or the door frame 101. The sealing groove may include but is not limited to: a continuous annular groove structure recessed on the door leaf frame 201 or the door frame 101, the continuous annular groove structure accommodates at least one elastic protrusion structure; or, an intermittent opening structure recessed on the door leaf frame 201 or the door frame 101, the intermittent opening structure is 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. The elastic protruding structural member and the sealing groove are installed in coordination and pressed against each other to fill the gap between the cabinet door outer frame 101 and the door leaf outer frame 201, thereby achieving airtight assembly of the cabinet door outer frame 101 and the door leaf outer frame 201.

[0111] 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, and the elastic deformation of the seal and / or sealing structure can be used to offset the processing deformation and use deformation of the cabinet door outer frame 101 to fill the gap between the mating contact surfaces, thereby improving the sealing performance of the power storage cabinet by using the seal and / or sealing structure. The cabinet door outer frame 101 is in sealed contact with the door leaf outer frame 201 to achieve airtight assembly of the cabinet body 1 and the door leaf 2.

[0112] Due to the sealed assembly between the cabinet door outer frame 101 and the door leaf outer frame 201, the nitrogen inside the cabinet 1 is difficult to leak to the external environment of the cabinet 1, and the air in the external environment of the cabinet 1 is difficult to flow into the interior of the power storage cabinet. Therefore, even if the battery thermal runaway occurs inside the power storage cabinet, the cabinet 1 can still maintain a sufficient amount of nitrogen, and the oxygen is isolated, so that the inert environment inside the cabinet can be guaranteed, which greatly reduces the probability of fire inside the power storage cabinet and improves the safety performance of the power storage cabinet. In addition, since the power storage cabinet of this embodiment has good air tightness, the high-temperature and high-pressure gas gathered inside the cabinet 1 is difficult to escape to the outside of the cabinet, which greatly reduces the occurrence of safety accidents of the power storage cabinet's electrical devices.

[0113] 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 airtightness of the energy storage cabinet.

[0114] In some embodiments, the cabinet 1 is further provided with a threading hole, in which other sealing components connected to the cabinet 1 are installed to improve the air tightness of the cabinet.

[0115] Compared with the traditional power storage cabinet, the power storage cabinet of the embodiment of the present application realizes the airtight assembly of the power storage cabinet by sealingly connecting the door leaf outer frame 201 and the cabinet door outer frame 101, thereby reducing the probability of fire and explosion, and fundamentally improving the fire safety reliability and service life. In addition, the battery is placed in the sealed power storage cabinet, which can be used in various scenes of humidity, water accumulation, and severe corrosion, and the cabinet body 1 is airtightly assembled to reduce the damage and corrosion of the battery in the cabinet.

[0116] 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 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 10102 arranged along the circumference of the door leaf outer frame 201, which means that the first matching portion 10102 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 explained in the same way.

[0117] It is worth noting that in the technical solution of the embodiment of the present application, the first connection portion 10101 and the first matching portion 10102 are sealed and matched to form a first sealing unit. The first connection portion 10101 and the first matching portion 10102 refer to the contact portions at the intersection of the cabinet door frame 101 and the door leaf frame 201, which are used to realize the assembly between the cabinet door frame 101 and the door leaf frame 201, and in the assembled state.

[0118] The line-surface seal mentioned in the embodiments of the present application refers to two objects in contact, one of which has a contact portion that is matched with the other object and installed with a planar structure at the end face structure, and the other has a contact portion that is matched with the other object and installed with 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 matching portion 10102 is in full contact, thereby achieving 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.

[0119] For example, Figure 3As shown, 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 the line-surface sealing between the cabinet door outer frame 101 and the door leaf outer frame 201.

[0120] 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.

[0121] Due to production and processing reasons or long-term use, the cabinet door and door leaf 2 of the power storage cabinet may have multiple uneven places with inconsistent surface flatness along the circumferential direction, resulting in inconsistent sizes of various gaps between the cabinet door and the door leaf 2. In this regard, the embodiment of the present application uses line-surface sealing technology to assemble the non-surface structure at the contact part into the surface structure to fill the gap between the cabinet door and the door leaf 2 at that place, and uses the elastic deformation at each contact part to flexibly adapt the corresponding gaps of inconsistent sizes, so that the gap between the cabinet body 1 and the door leaf 2 can be effectively filled to improve the airtight assembly effect between the cabinet body 1 and the door leaf 2.

[0122] 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.

[0123] 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.

[0124] According to some embodiments of the present application, one of the first connecting portion 10101 and the first matching portion 10102 is a first sealing ridge, and the other of the first connecting portion 10101 and the first matching portion 10102 is a first sealing surface.

[0125] In the technical solution of this embodiment, the non-planar structure is designed as a convex strip structure, and the planar structure is designed as a plane structure, wherein the first sealing convex strip is in sealing contact with the first sealing surface by assembling the sealing convex strip into the sealing plane to achieve line-surface sealing. Since the sealing convex strip is a non-interrupted integrated structure, the sealing structure between the cabinet door and the door leaf 2 is not easy to fall off, thereby improving the sealing stability of the line-surface sealing.

[0126] For example, the non-planar structure can be a rubber ring, the cross section of which at the contact portion has one or more linear protrusions such as corners, edges, apex angles, or apex edges, and the linear protrusions are arranged to protrude in the direction pointing to the planar structure; the planar structure can be another rubber ring, the cross section of which at the contact portion has one or more planes or concave arc surfaces, and the arc surface is arranged to be concave in the direction pointing to the non-planar structure. In this way, the integrated non-planar structure is assembled into the planar structure, and the reliability of the line surface sealing of the power storage cabinet is improved through the contact and matching of the two.

[0127] See also Figure 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, and the embedded portion and the elastic deformation portion can be embedded and matched.

[0128] In this embodiment, the matching installation method between the first sealing convex strip and the first sealing surface may include but is not limited to gluing, embedding, snap-fitting, etc. Among them, by embedding the first sealing convex strip into the first sealing surface, the sealing surface can be quickly assembled, with high flexibility and easy disassembly, thereby effectively ensuring installation efficiency.

[0129] In this embodiment, the embedded sealing convex strip and the sealing surface are pressed together to achieve line surface sealing. After the sealing convex strip is embedded in the sealing surface, the compression amount of the sealing convex strip and the depth of the sealing convex strip embedded in the sealing surface need to ensure the reliability of the line surface sealing. In the specific implementation of the line surface sealing, one of the sealing convex strip and the sealing surface can be designed as an elastic part and the other as a rigid part. For example, the elastic sealing surface can be equipped with a rigid sealing convex strip, or the rigid sealing surface can be equipped with an elastic sealing convex strip.

[0130] 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 convex strip; 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 convex strip is embedded in the first sealing surface.

[0131] See also Figure 3-Figure 5According to some embodiments of the present application, the cabinet door outer frame 101 has a second connection portion 10102 arranged along the circumference of the cabinet door outer frame 101, and the second connection portion 10102 is arranged around the outer side of the first connection portion 10101;

[0132] 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 . The second connecting portion 10102 is sealed and connected to the second matching portion 20102 .

[0133] In the technical solution of the embodiment of the present application, the second connection part 10102 and the second matching part 20102 are airtightly assembled to form a second sealing unit. In some specific embodiments, the second connection part 10102 can be a sealing strip pasted on the cabinet door frame 101, and the second matching part 20102 is the surface of the door leaf frame 201, and the surface of the door leaf frame 201 matches the sealing strip one by one. Alternatively, the second connection part 10102 is the surface of the cabinet door frame 101, and the second matching part 20102 is a sealing strip pasted on the door leaf frame 201, and the surface of the door leaf frame 101 matches the sealing strip one by one.

[0134] In the embodiment of the present application, the second sealing unit can be used to work simultaneously with the first sealing unit to achieve double-layer sealing between the power storage cabinet door and the door leaf 2 to improve the sealing effect. In addition, the second sealing unit can also be used to supplement the sealing of the power storage cabinet when the sealing of the first sealing unit fails to improve the sealing reliability.

[0135] 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 structure and the surface structure are in contact to achieve the surface-contact airtight assembly of the cabinet door frame 101 and the door leaf frame 201. 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.

[0136] In some embodiments, to improve the sealing performance, the power storage cabinet can also be designed as a multi-layer sealing structure with three or more layers. For example, the power storage cabinet includes a first sealing unit and two second sealing units, wherein the first sealing unit includes a sealing convex strip provided on the inner edge of the cabinet door frame 101 and a sealing surface attached to the door leaf frame 201; the second sealing unit includes two pairs of sealing surfaces attached to the cabinet door frame 101 and the door leaf frame 201 for use in conjunction with each other. To facilitate the manufacture and assembly of the sealing units, adjacent sealing units are arranged at equal intervals.

[0137] 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.

[0138] Compared with surface-to-surface sealing, line-to-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 10102, and the seal between the second connecting part 10102 and the second matching part 20102 are designed as a line-to-surface sealing method combining a sealing convex strip and a sealing surface, so as to utilize double-layer line-to-surface sealing to further improve the airtightness of the power storage cabinet.

[0139] In the technical solution of the embodiment of the present application, according to actual needs, the implementation method of the line surface seal between the first connecting part 10101 and the first matching part 10102, and between the second connecting part 10102 and the second matching part 20102 can be flexibly designed. Among them, the line surface seal between the second sealing convex strip and the second sealing surface is also referred to the line surface seal between the first sealing convex strip and the first sealing surface in the sealing technology between the first connecting part 10101 and the first matching part 10102 mentioned above, and will not be repeated here.

[0140] In a specific embodiment, the first connection part 10101 is a first sealing convex strip, the first matching part 10102 is a first sealing surface, and the first sealing convex strip can be assembled into the first sealing surface to achieve a line-surface seal between the first connection part 10101 and the first matching part 10102; the second connection part 10102 is a second sealing surface, the second matching part 20102 is a second sealing convex strip, and the second sealing convex strip can be assembled into the second sealing surface to achieve a surface-line seal between the second connection part 10102 and the second matching part 20102. In this way, the double-layer sealing structure is a line-surface contact sealing technology to further improve the sealing performance of the power storage cabinet.

[0141] See also Figure 3-Figure 5According to some embodiments of the present application, the first connecting portion 10101 is a first sealing convex strip, and the first matching portion 10102 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.

[0142] For large-scale power storage cabinets, due to their large size, it is difficult to seal by processing convex strips on them, and because the door leaf 2 is usually a flat thin plate, its overall strength is lower than that of the power storage cabinet body 1. Therefore, in the technical solution of the embodiment of the present application, the sealing convex strip is only set on the cabinet door outer frame 101, and only a surface structure is set 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 the good sealing performance brought by the line-surface sealing is provided, the processing difficulty of the sealing convex strip is reduced, which is conducive to the realization of the sealing technology of large-scale power storage cabinets, and at the same time, it avoids the problem that the overall strength of the door leaf 2 is reduced due to the setting of the sealing convex strip on the door leaf 2, thereby reducing the air tightness of the power storage cabinet.

[0143] In addition, in order to reduce the difficulty of processing the sealing structure on the cabinet door outer frame 101, in other embodiments, the sealing ridge can be only provided on the door leaf outer frame 201, that is, the sealing ridge is only provided on one of the first connecting part 10101 or the second connecting part 10102, thereby achieving line-surface sealing and surface-surface sealing.

[0144] See also Figure 3-Figure 5 According to some embodiments of the present application, the first connection portion 10101 is disposed on the inner edge of the cabinet door frame 101 , and the second connection portion 10102 is disposed on the outer edge of the cabinet door frame 101 .

[0145] 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.

[0146] Exemplarily, the first sealing convex strip is disposed on the inner edge of the cabinet door outer frame 101 , and the first matching surface is disposed on the outer edge of the cabinet door outer frame 101 .

[0147] Since the cabinet door outer frame 101 or the door leaf outer frame 201 is often bound to the cabinet door or the door leaf 2 by its outer edge, and there is no cabinet door or the door leaf 2 entity at the inner edge, the difficulty of processing the first sealing convex strip on the inner edge is much less than the difficulty of processing the first sealing convex strip on the outer edge. Based on this, in order to take into account the processing difficulty of line and surface sealing, this embodiment reduces the processing difficulty of the sealing convex strip by sleeve-arranging the mating surface on the outer side of the first sealing convex strip.

[0148] In the technical solution of this embodiment, for the case where the cabinet door frame 101 has a sealing ridge, by designing the first sealing ridge to be located at the inner edge of the cabinet door frame 101, and the first mating surface to be located at the outer edge of the cabinet door frame 101, it is convenient to form the first sealing ridge integrally on the cabinet door frame 101 on the base of the cabinet door frame 101 by curling the edge of the cabinet door frame 101, thereby reducing the difficulty of processing the sealing ridge on the cabinet door of the power storage cabinet.

[0149] 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 by means of a sealing convex strip structure formed by the inner circle flange of the cabinet door outer frame 101 and an additional outer circle sealing strip, and the outer circle sealing strip and the flat section of the door leaf outer frame 201 are pressed tightly to realize a stable airtightness of the cabinet body 1.

[0150] In addition, for other situations of double-layer sealing using a combination of line-surface sealing and surface-surface sealing, for example, when a 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.

[0151] See also 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, and the second matching portion 20102 is a sealing ring with an arc-shaped cross-section.

[0152] 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 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.

[0153] In the technical solution of the embodiment of the present application, in the second sealing unit, the contact between the first mating surface and the second mating surface, that is, the contact between the plane where the cabinet door outer frame 101 is located and the straight line where the arc vertex of the arc-shaped sealing ring is located, can be regarded 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 convex strip and the sealing surface, this embodiment can be essentially understood as a double-layer line-surface seal.

[0154] 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, the present embodiment realizes a sealing technology that is low-cost, easy to manufacture, and has good sealing properties for the power storage cabinet, thereby solving the problem of complex and difficult sealing of large power storage cabinets.

[0155] 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 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 frame 201.

[0156] For line-surface sealing and surface-surface sealing, setting the planar structure in the contact part as a rubber pad can be more advantageous for manufacturing, and since the rubber pad has a low cost, the sealing cost of the power storage cabinet can be further reduced. In some embodiments, the rubber pad can be set on the cabinet door frame 101 or the door leaf frame 201 according to actual needs.

[0157] For example, for the second connection part 10102 and the second matching part 20102 of the surface-to-surface sealing type, the first matching surface may be a rubber pad provided on the cabinet door outer frame 101, and the second matching surface may be a rubber pad provided on the door leaf outer frame 201. For another example, for the first connection part 10101 and the first matching part 10102 of the line-to-surface sealing type, the second sealing surface may be a rubber pad provided on the door leaf outer frame 201.

[0158] See also Figure 3-Figure 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.

[0159] For line-to-surface sealing and surface-to-surface sealing, the planar structure in the contact portion is designed to be a part of the surface of the cabinet door outer frame 101 or the door leaf outer frame 201 of the power storage cabinet 1. 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 1 and maintaining effective sealing for a longer period of time.

[0160] See also Figure 3-Figure 5According to some embodiments of the present application, the first connection portion 10101 is formed 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.

[0161] Exemplarily, the first sealing convex strip 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 .

[0162] In this embodiment, for the first connecting portion 10101, the outer edge of the cabinet door outer frame 101 is folded outward along the circumferential direction of the cabinet door outer frame 101, and rolled up to form a convex structure, that is, a first sealing convex strip is formed to serve as a non-planar structure of the contact portion. Since the sealing convex strip A is made integrally with the cabinet door outer frame 101, the airtightness of the sealing convex strip can be effectively improved.

[0163] See also Figure 3-Figure 5 According to some embodiments of the present application, the second sealing ridge of the second connection 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 in the direction toward the cabinet door outer frame 101.

[0164] 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 .

[0165] For the second connection portion 10102 or the second matching portion 20102, when the sealing convex strip is provided on the door leaf outer frame 201, the outer edge of the door leaf outer frame 201 is folded outwardly along the circumferential direction of the door leaf outer frame 201, and rolled up to form a convex structure, that is, a second sealing convex strip is formed to serve as a non-surface structure of the contact portion. Since the sealing convex strip B is made integrally with the door leaf outer frame 201, the air tightness of the sealing convex strip can be effectively improved.

[0166] See also Figure 4 According to some embodiments of the present application, the first sealing ridge includes a ridge body T and a folding portion M formed by bending the ridge body T in a direction away from the door leaf 2 .

[0167] The folded portion M and the convex strip body T form a certain angle, so that the folded portion can be embedded in the first matching portion. The angle can be 0-90°. In order to make the folded portion have sufficient strength, the angle is preferably 0°-10°, that is, the folded portion M and the convex strip body T completely overlap or nearly overlap.

[0168] Specifically, when the first connecting portion 10101 is arranged 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 a folding portion M; or, when the first matching portion 10102 is arranged 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 a folding portion M.

[0169] During the closing process of the door leaf 2, the first connection part 10101 is embedded in the first sealing surface, or the first matching part 10102 is embedded in the first connection part 10101, so as to achieve a linear surface seal between the first connection part 10101 and the first sealing surface, thereby improving the firmness between the door leaf 2 and the cabinet door. The folding part M can increase the contact area between each connection part and the corresponding matching part, so that the contact between each connection part and the corresponding matching part is more tight and firm, thereby improving the airtightness effect and the sealing durability.

[0170] 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 10102 to improve the durability of the sealing effect.

[0171] See also Figure 4-5 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;

[0172] 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.

[0173] In this embodiment, there are many possible implementation methods for adjusting h1 and h2. For example, along the direction from the first connection part 10101 to the first matching part 20101, the length of the raised section of the first connection part 10101 is changed, that is, the length of the convex strip body T is changed; for another example, along the direction from the door leaf outer frame 201 to the cabinet door outer frame 101, the size of the raised section of the door leaf outer frame 201 for installing the second matching part 20102 is changed, that is, the height of the installation convex strip H is changed; for another example, the thickness of the first matching part 20101 is changed, and the thickness of the second matching part 20102 is changed. In this way, when the door leaf 2 is closed, the first matching part 20101 and the second matching part 20102 can be compressed, thereby compensating for the extrusion type variable error of the first matching part 20101 and the second matching part 201012 in the closed door sealing state, thereby achieving simultaneous sealing of the two sealing parts to enhance the sealing effect of the cabinet.

[0174] According to the actual application scenario of the power storage cabinet, the preset threshold can be set within the allowable value range to absorb the elastic deformation error of the sealing structure by means of the size difference between each connecting part and the matching part. For example, the preset threshold can be set to 0, that is, h1 and h2 are equal.

[0175] See also Figure 3 and Figure 6 According to some embodiments of the present application, the power storage cabinet 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.

[0176] 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 via a hinge shaft 403, thereby utilizing the hinge structure to realize a hinge connection between the door leaf 2 and the cabinet door, so as to improve the stability of the connection between the cabinet body 1 and the door leaf 2, thereby improving the air tightness of the cabinet body 1.

[0177] See also Figure 3 and Figure 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 piece 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 piece 404.

[0178] For the high-voltage cabinet, 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 movable hinge 401 in the hinge structure to displace toward the static hinge 402, so that the hinge shaft 403 rotates, and a gap is generated between the door leaf 2 and the cabinet 1. This gap will affect the air tightness of the power storage cabinet.

[0179] In view of this, the present embodiment designs a locking assembly to be added to the non-hinge ends of the moving hinge 401 and the static hinge 402, so that the moving hinge 401 and the static hinge 402 are locked together by the locking assembly. The locking assembly is used to make the end of the hinge shaft 403 pass through the limit stop of the locking assembly. When the hinge is closed, the locking assembly is used to limit the moving hinge 401, thereby reducing the small gap between the door leaf 2 and the cabinet body 1 caused by the rotation of the hinge shaft 403, thereby effectively ensuring the airtight effect.

[0180] 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.

[0181] See also Figure 3 and Figure 6 According to some embodiments of the present application, the static hinge 402 is provided with a limiting step G, and the limiting step G is used to constrain the locking member 404, and the locking hole 405 is provided on the surface of the limiting step G.

[0182] 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.

[0183] See also Figure 6 According to some embodiments of the present application, along the axial direction of the hinge axis 403, the locking member 404 and the locking hole 405 are centrally arranged on the movable hinge 401 and the static hinge 402 respectively.

[0184] The locking member 404 can be arranged at any position of the hinge structure according to actual needs. For example, since the locking member 404 is easily blocked by the wall of the locking hole 405 during the process of locking and opening, the locking member 404 can be arranged at the movable hinge 401 and the locking hole 405 can be arranged at the static hinge 402, so as to flexibly lock or unlock the locking member 404. In addition, considering the balanced force, it is preferred to arrange the locking member 404 at the center of the movable hinge 401 or the static hinge 402.

[0185] See also Figure 3 and Figure 7 According to some embodiments of the present application, the power storage cabinet 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 .

[0186] After long-term use, the door leaf 2 is displaced relative to the cabinet body 1 of the power storage cabinet, the door leaf 2 becomes loose and falls, and the sealing effect is reduced. Long-term use may even cause the risk of safety accidents.

[0187] 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. A supporting surface is provided on the upper surface of the door support body 601. 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. By adopting the above technical solution, by arranging the door support assembly 6 on the power storage cabinet, 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, which effectively solves the problem of the door leaf 2 becoming loose and sagging after being used for a long time.

[0188] See also Figure 7 and Figure 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 .

[0189] 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.

[0190] See also Figure 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 , and the inclined surface 603 is adjacent to the upper surface of the door support body 601 .

[0191] 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 by the door support body 601 .

[0192] With the aid of the inclined surface 603, the auxiliary roller assembly 602 can roll smoothly, thereby achieving fast and smooth opening and closing of the door.

[0193] See also Figure 3 and Fig. 9 According to some embodiments of the present application, the power storage cabinet 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.

[0194] In order to improve the sealing effect, the present 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. Specifically, when the door leaf 2 is in a closed state, the present embodiment can coordinate and 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 bolt assembly 701 screwed into the cabinet body 1, so as to make the door leaf outer frame 201 and the cabinet door outer frame 101 roughly parallel, and lock and fix the door leaf 2 to the cabinet body 1 by matching the stopper 702 with the bolt assembly 701.

[0195] Therefore, the sealing structures of the power storage cabinet are adjusted by the cooperation of the stopper 702 and the bolt assembly 701, so that the power storage cabinet can achieve a better airtight effect. It is worth noting that the tightening of the bolt assembly 701 should not be too loose or too tight, and it is necessary to ensure that the door leaf outer frame 201 and the cabinet door outer frame 101 are roughly parallel in the closed state.

[0196] In some embodiments, the bolt assembly 701 and the stopper 702 can be installed on the door leaf outer frame 201 / cabinet door outer frame 101 by mechanical connection methods such as welding and riveting. In addition, in this embodiment, with the help of the fixing assembly 7, the door leaf 2 can be limited and fixed, so that when the power storage cabinet is closed, the door leaf 2 and the cabinet door are locked around, avoiding the door leaf 2 from loosening due to impact force, improving the explosion-proof ability of the door leaf 2, and further ensuring the airtight reliability of the power storage cabinet. Please refer to Fig. 9 and Fig.10 According to some embodiments of the present application, the bolt assembly 701 includes a hinge bolt 70101 and a fixing nut 70102 .

[0197] In this embodiment, the hinge bolt 70101 is rotatable and is used in conjunction with the fixing nut 70102 to fix the door leaf 2. The hinge bolt 70101 is easy and convenient to install, which reduces the difficulty of airtight assembly of the power storage cabinet.

[0198] In some embodiments, a movable bolt with a higher thread accuracy can be used as an accessory to improve the overall airtight quality and fixing effect of the power storage cabinet.

[0199] The installation of the fixing assembly 7 does not require any changes to the cabinet door structure of the cabinet body 1, and can be adapted to the industry standard size, following the size of the standard product of the power storage cabinet, to ensure product versatility. In some embodiments, the movable bolts can be standard parts.

[0200] See also Fig. 9 and Fig.10According to some embodiments of the present application, the limiting member 702 includes a flat plate, and a recessed portion N is provided at one end of the flat plate away from the door leaf 2, and the recessed portion N is used to accommodate the movable bolt 70101.

[0201] In this embodiment, one end of the swing bolt 70101 is fixed to the cabinet body 1, for example, to the cabinet door outer frame 101. When the door leaf 2 is closed, the swing bolt 70101 is rotated to push the other end of the swing bolt 70101 into the recess N of the stopper 702, and the fixing nut 70102 is screwed into the other end until the fixing nut 70102 abuts against the stopper 702, thereby tightening and fixing the swing bolt 70101 by using the fixing nut 70102.

[0202] The recessed portion N is used to limit the displacement and shaking of the movable bolt 70101 in a direction parallel to the plane where the cabinet door is located, so as to improve the assembly stability of the bolt assembly 701 and the limiting member 702, thereby improving the sealing and airtight effect of the cabinet body 1.

[0203] In some embodiments, the bolt assembly 701 further includes a bolt mounting bracket 70103 , and the bolt mounting bracket 70103 is used to mount the swing bolt 70101 to the cabinet 1 .

[0204] In this embodiment, with the help of the bolt mounting frame 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.

[0205] In some embodiments, the bolt assembly 701 further includes a pin 70104, and the pin 70104 is inserted into the bolt mounting frame 70103. With the help of the pin 70104, the swing bolt 70101 is rotatably connected to the bolt mounting frame 70103, and the bolt mounting frame 70103 is fixed to the cabinet door outer frame 101. Thus, with the help of the fixing assembly 7, the door leaf 2 is locked on the cabinet door.

[0206] In some embodiments, the bolt assembly 701 further includes a stopper 70105, the pin 70104 is inserted into the bolt mounting frame 70103, and the stopper 70105 is arranged at the end of the pin 70104. With the help of the stopper 70105, the rotation of the pin 70103 is limited, thereby improving the assembly stability of the bolt assembly 701 and the limiter 702, thereby further improving the airtight effect of the power storage cabinet. In some embodiments, the bolt mounting frame 70103 is composed of three plate-like members, each of which encloses a receiving chamber S, and the receiving chamber S provides a rotatable space for the movable bolt 70101.

[0207] 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 can be firmly mounted to the cabinet door, thereby improving the airtight assembly flexibility of the power storage cabinet.

[0208] See also Figure 3 According to some embodiments of the present application, there are multiple fixing assemblies 7, and the bolt assemblies 701 are evenly spaced around the periphery of the cabinet door frame 101, and the limiting members 702 are evenly spaced around the periphery of the door leaf frame 201.

[0209] In this embodiment, multiple fixing components 7 are arranged at intervals around the cabinet door, and each bolt component 701 is locked with the corresponding limiter 702 to achieve multi-point locking of the cabinet body 1. Multiple fixing components 7 arranged at intervals make the cabinet door more reasonably stressed, and the power storage cabinet can evenly withstand pressure, so it can withstand greater impact force, and improve the reliability of cabinet door locking.

[0210] According to actual needs, the arrangement of the stopper 702 and the live bolt 70101 can be flexibly designed to be located at the periphery of the cabinet door. In some embodiments, the bolt assemblies 701 are symmetrically distributed on the upper edge and the lower edge of the cabinet door frame 101. When the left edge of the cabinet door frame 101 is the side where the static hinge 402 in the hinge assembly 4 is located, a plurality of bolt assemblies 701 are evenly distributed on the right edge of the cabinet door frame 101.

[0211] 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.

[0212] In this embodiment, the cabinet door frame 101 or the door leaf frame 201 can be formed by stamping or rolling a sheet metal and bending it multiple times. For example, the frame cross section is a closed quadrilateral frame, and the first folded edge, the second folded edge, the third folded edge and the first limit protrusion are all solid structures, so that the power storage cabinet door leaf frame 201 and / or the cabinet door frame 101 have higher strength, a more stable structure, and are not easily deformed when subjected to external forces. In addition, the sheet metal structural parts are made of metal, integrally formed, and have uniform thickness, which improves the anti-electromagnetic interference performance of the cabinet body under high-voltage and strong magnetic environments.

[0213] In some embodiments, the air pressure inside the cabinet 1 is greater than the air pressure outside the cabinet 1 .

[0214] In order to improve the flame retardant effect of the power storage cabinet, the cabinet is often filled with nitrogen or other inert gases. The embodiment of the present application sets the air pressure inside the cabinet to be greater than the air pressure outside the cabinet to reduce the entry of external air into the cabinet, and facilitates the outflow of the gas inside the cabinet to the outside of the cabinet 1, thereby reducing the content of the combustion-supporting gas in the cabinet, thereby facilitating the provision of a flame retardant environment inside the cabinet.

[0215] Exemplarily, the power storage cabinet is placed in an atmospheric pressure environment, and the air pressure in the cabinet 1 is 1.5-5 times the standard atmospheric pressure.

[0216] See also Figure 2 and Fig. 9 According to some embodiments of the present application, the cabinet 1 includes a gas pipeline connection port 5.

[0217] The air tightness of the power storage cabinet often fails to meet the user's requirements due to structural processing errors during manufacturing, or the seal of the power storage cabinet fails due to long-term use, etc., so as to facilitate gas exchange in the cabinet. In some embodiments, a gas pipeline connection port 5 is provided at the bottom of the cabinet 1, and an air outlet 3 is provided at the top of the cabinet 1, so that inert gas is filled from the bottom of the cabinet 1, and the existing atmosphere in the cabinet flows out from the top of the cabinet 1, so that the air in the cabinet 1 is quickly replaced with nitrogen or other inert gases.

[0218] 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 to explode.

[0219] 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; 1.5m to 2.5m respectively.

[0220] In the related art, for large-volume power storage cabinets, the edges of the cabinet body 1 need to be fully welded. Due to the large number of welds, thin steel plates, and low product consistency, it is difficult to seal the power storage cabinet. The sealing technology of the embodiment of the present application is applied to such large-scale power storage cabinets. For example, for a rectangular power storage cabinet with a length, width, and height of 0.6m to 1m, 1m to 1.5m, and 1.5m to 2.5m, respectively, a good airtightness of the large-scale power storage cabinet can be achieved. Specifically, the power storage cabinet can be 0.6m, 0.7m, 0.8m, 0.9m, and 1m long; 1m, 1.1m, 1.2m, 1.3m, 1.4m, and 1.5m wide; and 1.5m, 1.6m, 1.7m, 1.8m, 1.9m, 2.0m, 2.1m, 2.2m, 2.3m, 2.4m, and 2.5m high.

[0221] In some embodiments, the cabinet body includes but is not limited to a hexahedron, and may also be a cylindrical cabinet, a prismatic cabinet, etc. The door leaf includes but is not limited to a side opening and closing method, and may also be a top and bottom opening and closing method.

[0222] 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 matching 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 is difficult to achieve the expected expected level.

[0223] In some embodiments, at least one battery pack box group is placed in the power storage cabinet.

[0224] In the embodiment of the present application, the power storage cabinet may include but is not limited to a cabinet-type energy storage device with a storage space, and one or more power boxes may be placed in the storage space.

[0225] The power storage cabinet sealing technology of the embodiment of the present application is particularly suitable for the sealing of large power storage cabinets, for example, it is suitable for cabinet-type energy storage devices with 3 to 8 electric boxes. Since the internal energy of such energy storage devices is highly concentrated, by adopting the sealing technology of the embodiment of the present application, for example, double-layer wire sealing is adopted between the cabinet and the door leaf, the high-energy large power storage cabinet can be well sealed. Specifically, the number of electric boxes can be 3, 4, 5, 6, 7, 8, and so on.

[0226] Example 1

[0227] Please refer to Figure 2 , Figure 3 and Fig.11 The power storage cabinet includes a cabinet body 1 and a door leaf 2. The power storage cabinet 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 beam 203 and the longitudinal beam 202 in this embodiment ensures the overall high strength of the door leaf 2 and good processability. 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 respectively used to stick the inner ring sealing strip as the first matching part 10102 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. A number of limiters 702 and movable hinges 401 are welded around the main body of the door leaf 2 for installation between 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 between the door leaf 2 and the cabinet door.

[0228] 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.

[0229] The cabinet door outer frame 101 has a first mating surface at the outer edge of the cabinet door outer frame 101 and along the circumference of the cabinet door outer frame 101; the first sealing ridge and the first mating surface are arranged at intervals along a first direction X, and the first direction X is parallel to the cabinet door outer frame 101 and points from the inside of the cabinet body 1 to the outside of the cabinet body 1.

[0230] 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.

[0231] The first sealing convex strip 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 matching surface is a part of the cabinet door outer frame 101, and the second matching surface is a sealing ring with an arc cross section. The curved edge of the second matching surface is in sealing contact with the straight edge of the first matching surface. The first sealing convex strip has a folding portion M that is bent once along the second direction Y, and the second direction Y is set at an angle to the first direction X.

[0232] 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 through 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 with the help of the open retaining ring 406.

[0233] The power storage cabinet also includes a door support assembly 6, which includes a door support body 601 arranged at the bottom of the cabinet door outer frame 101, and a roller assembly 602 arranged 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, the roller assembly 602 rolls 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.

[0234] The power storage cabinet further includes a plurality of fixing components 7, each of which includes a bolt component 701 disposed on the cabinet door outer frame 101, and a stopper 702 disposed on the door leaf outer frame 201; the bolt component 701 cooperates with the stopper 702. The bolt component 701 includes a hinge bolt 70101, and the stopper 702 includes a flat plate, and a recess N is provided at one end of the flat plate away from the door leaf 2, and the recess N is used to accommodate the hinge bolt 70101. The bolt component 701 further includes a bolt mounting frame 70103, a pin 70104, a fixing nut 70102, and a stopper 70105. The bolt mounting frame 70103 is composed of three plate-like components, and each plate-like component encloses a receiving chamber S, and the receiving chamber S provides a rotatable space for the hinge bolt 70101. The stopper 702 is welded to the edge of the door leaf 2, the bolt mounting frame 70103 is welded to the edge of the cabinet door, the pin 70104 is inserted into the bolt mounting frame 70103, and the stopper 70105 is arranged at the end of the pin 70104. One end of the swing bolt 70101 is rotatably connected to the bolt mounting frame 70103 through the pin 70104, so that the end of the swing bolt 70101 is mounted to the cabinet door with the help of the bolt mounting frame 70103. When the door leaf 2 is closed, the swing bolt 70101 is rotated to push the other end of the swing bolt 70101 into the recessed portion N of the stopper 702, and the fixing nut 70102 is screwed into the other end until the fixing nut 70102 abuts against the stopper 70102, and the rotation of the pin 70104 is limited by the stopper 70105, so that the bolt assembly 701 and the stopper 70102 are matched and installed. Thus, the door leaf 2 is locked on the cabinet door by means of the fixing assembly 7 .

[0235] The door leaf outer frame 201 and the cabinet door outer frame 101 are integrated sheet metal structures that are bent seven times.

[0236] The air pressure inside the cabinet 1 is greater than the air pressure outside the cabinet 1 .

[0237] 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 .

[0238] The large-scale power storage cabinet of the present embodiment 1 needs to make use of the above sealing technology to make the cabinet body have good air tightness, thereby fundamentally solving the problem of large fire hazards of large-scale power storage cabinets.

[0239] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A power storage cabinet, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: The first connection portion is formed to protrude in a direction toward the door leaf frame along a circumferential direction of the cabinet door frame based on a surface of the cabinet door frame.

11. The power storage cabinet according to any one of claims 4 to 9, characterized in that: 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 11, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: The bolt assembly includes a swing bolt and a fixing nut.

23. The power storage cabinet according to claim 21, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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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