Battery cabinet

Abstract

The invention provides a battery cabinet. The battery cabinet comprises a cabinet body and a drain valve assembly, the bottom of the drain valve assembly is fixed on the battery cabinet from bottom to top through a mounting opening in the bottom of the cabinet body, and the top of the drain valve assembly is in butt joint with a drain opening in the cabinet body. The drainage valve assembly is provided with magnetic substances, and automatic drainage can be achieved. Compared with an existing technical method of installing the drain valve assembly from the interior of the battery cabinet, the operation of fixing the drain valve assembly through the installation opening is more convenient, the battery monomers in the cabinet do not need to be moved when the drain valve assembly is disassembled, and the convenience of disassembling and assembling the drain valve assembly is improved.

Description

[0001] This application is a divisional application of the invention patent application with the application date of August 30, 2021, application number 202111005838.6, and name “Battery Cabinet”. Technical Field

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

[0003] The battery cabinet is an important part of the battery energy storage system. The battery cells are stored in the battery cabinet. In order to ensure the normal operation of the battery cabinet and prevent moisture from damaging the battery, the battery cabinet is equipped with drainage components to drain the internal water.

[0004] The existing drainage components have complicated steps and are difficult to operate when being installed or disassembled. Therefore, how to realize the convenient disassembly and assembly of the drainage components of the battery cabinet has become an urgent problem to be solved. Summary of the invention

[0005] The present application provides a battery cabinet, aiming to improve the convenience of installation and disassembly of drainage components of the battery cabinet.

[0006] The present application provides a battery cabinet, comprising: a cabinet body and a drain valve assembly. The cabinet body comprises an upper cabinet body and a lower cabinet body, and the upper cabinet body is used to accommodate battery cells. An upper cabinet body bottom plate is provided at the bottom of the upper cabinet body, and a drain port is provided on the upper cabinet body bottom plate. The lower cabinet body comprises a lower cabinet body bottom plate, and a drain valve mounting port is provided on the lower cabinet body bottom plate. The drain valve assembly is installed on the drain valve mounting port from bottom to top, and is connected to the drain port, so as to be used for one-way sealed drainage toward the outside of the cabinet body through the drain valve mounting port. Compared with the prior art method of installing the drain valve assembly from the inside of the battery cabinet, the operation of fixing the drain valve assembly through the drain valve mounting port is more convenient, and there is no need to move the battery cells in the cabinet when disassembling the drain valve assembly. In addition, since the drain valve assembly is installed on the lower cabinet body, the occupation of the internal space of the upper cabinet body by the drain valve assembly is reduced, thereby improving the energy density of the battery cabinet.

[0007] In some embodiments, the drain valve assembly includes a drain valve, a mounting plate, a frame, and a connecting bottom plate. The mounting plate is connected to the inner wall of the frame, the drain valve is sealed and connected to the mounting plate, the connecting bottom plate is arranged at the bottom of the frame, and the frame is connected to the bottom surface of the bottom plate of the lower cabinet through the connecting bottom plate. The frame serves to connect the mounting plate and the connecting bottom plate, the mounting plate can fix the drain valve, and the connecting bottom plate realizes the connection between the drain valve assembly and the battery cabinet.

[0008] In some embodiments, the drain valve assembly further includes a first seal, and the drain valve is sealed and connected to the mounting plate via the first seal, thereby improving the sealing between the drain valve and the mounting plate.

[0009] In some embodiments, the drain valve assembly further includes a second seal, which is disposed between the connecting bottom plate and the lower cabinet bottom plate to improve the sealing performance between the connecting bottom plate and the lower cabinet bottom plate.

[0010] In some embodiments, the bottom plate of the upper cabinet body includes a water guide plate and a water guide box. The upper end of the water guide box is connected to the water guide plate, and the lower end of the water guide box is connected to the drain valve assembly. The water in the cabinet flows along the water guide plate through the water guide box to the drain valve assembly, and finally out of the battery cabinet, realizing one-way drainage.

[0011] In some embodiments, the water guide box is disposed on one side of the upper cabinet bottom plate close to the battery cabinet door panel, so that when disassembling the drain valve assembly, there is no need to enter the battery cabinet, thereby reducing the difficulty of the disassembly and assembly operation.

[0012] In some embodiments, the lower edge of the water guide box is lower than the upper edge of the drain valve assembly frame, so that the frame is sleeved on the water guide box to prevent water from splashing outside the drain valve assembly.

[0013] In some embodiments, the water guide plate has a drainage structure, which is inclined downward toward the position of the water guide box, so that the accumulated water can flow out of the battery cabinet to the greatest extent.

[0014] In some embodiments, the drain valve includes a valve core assembly and a shell, wherein the valve core assembly is disposed in the shell. The shell is a cylindrical structure, and an outwardly folded edge is disposed on the top of the cylindrical structure. The outwardly folded edge is conducive to collecting water flow.

[0015] In some embodiments, the valve core assembly includes a metal valve core, a guide rod, and a third sealing member. The metal valve core can be movably mounted on the guide rod, and a magnetic material is provided on the guide rod. When the downward force applied to the metal valve core is greater than a preset value, the drain valve is opened to achieve automatic drainage. The opening and closing of the valve core assembly controlled by the magnetic material can accurately achieve automatic drainage, and the third sealing member can improve the sealing performance of the valve core assembly.

[0016] In the battery cabinet provided in the application, the battery cabinet includes a cabinet body and a drain valve assembly. The drain valve assembly is detachably fixed to the drain valve installation port of the bottom plate of the lower cabinet body, and the drain valve assembly can be easily installed and removed. The drain valve assembly is installed in the lower cabinet body to avoid occupying the internal space of the upper cabinet body, so that more battery cells can be accommodated in the upper cabinet body, thereby improving the energy density of the battery cabinet. Therefore, the embodiment of the present invention can realize the convenient disassembly and assembly of the drain valve assembly of the battery cabinet, while achieving good drainage and sealing effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application 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 the drawings without paying creative work.

[0018] Figure 1 is a schematic diagram of a battery cabinet disclosed in an embodiment of the present application;

[0019] Figure 2 It is a schematic diagram of the installation of the drain valve assembly disclosed in the embodiment of the present application;

[0020] Figure 3 yes Figure 2 Enlarged view of the portion A in the middle dotted circle;

[0021] Figure 4 yes Figure 2 A partial enlarged view of the cross section taken along line BB;

[0022] Figure 5 is an exploded view of a drain valve assembly disclosed in an embodiment of the present application;

[0023] Figure 6 is a schematic diagram of the upper cabinet bottom plate disclosed in the embodiment of the present application;

[0024] Figure 7 It is a schematic diagram of the internal structure of the drain valve in a closed state disclosed in an embodiment of the present application;

[0025] Figure 8 It is a schematic diagram of the internal structure of the drain valve in the open state disclosed in the embodiment of the present application.

[0026] In the drawings, the drawings are not drawn to scale.

[0027] Marking Description:

[0028] 1-cabinet; 11-upper cabinet; 111-upper cabinet bottom plate; 1111-water guide plate; 1112-water guide box; 112-drain port; 12-lower cabinet; 121-lower cabinet bottom plate; 1211-first nut; 1212-first bolt; 122-drain valve installation port;

[0029] 2-drain valve assembly; 21-drain valve; 211-valve core assembly; 2111-metal valve core; 2112-guide rod; 2113-third sealing member; 212-housing; 22-mounting plate; 221-second nut; 222-second bolt; 23-frame; 24-connecting base plate; 241-first through hole; 25-first sealing member; 26-second sealing member; 261-second through hole; 27-upper pressure plate. DETAILED DESCRIPTION

[0030] The following detailed description and drawings of the embodiments of the present application are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0031] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, 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 cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0032] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0033] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0034] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

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

[0036] The term "plurality" used in the present application refers to two or more (including two).

[0037] Energy storage battery cabinets have been increasingly widely used in the fields of new energy, smart grids, and energy-saving technologies. Battery cells are arranged inside the battery cabinet. There is heat release in the battery cell during the charging and discharging process. In order to prevent the battery cell from overheating, a cooling system is provided in the battery cabinet. However, when the gas in the battery cabinet encounters the condensed water with a lower temperature in the cooling pipe, it will condense on the outer wall of the pipe to produce moisture. If the moisture inside the battery cabinet cannot be discharged in time, the battery cell will be damaged. Therefore, the battery cabinet is required to have a very high waterproof level. In order to solve the drainage problem of the battery cabinet, the existing battery cabinet is provided with a drain or a drain is installed. On the one hand, the drain is a through hole set on the bottom plate of the battery cabinet. This type of solution has poor sealing performance, and the corrosive gas outside the cabinet can enter the cabinet and corrode the internal components of the battery cabinet. On the other hand, although the drainage component is installed on the bottom plate of the battery cabinet to achieve one-way sealed drainage, it is necessary to enter the battery cabinet when installing the drainage component, and the battery cell in the cabinet needs to be moved when disassembling the drainage component, which is difficult to operate. Therefore, the inventor has found out from the research of this battery cabinet that a mounting opening is provided on the bottom plate of the battery cabinet so that the drainage member can be installed or removed from bottom to top, which increases the convenience of operation. It can also realize the one-way sealed drainage of the battery cabinet and improve the sealing performance. In addition, it can also reduce the occupation of the internal space of the battery cabinet by the drainage member and improve the energy density of the battery cabinet.

[0038] The present application discloses a battery cabinet, which can be used in new energy power plants such as wind power plants, photovoltaic power plants, or in technical fields such as microgrids.

[0039] See also Figures 1 to 4 , the embodiment of the present application discloses a battery cabinet. The battery cabinet includes a cabinet body 1 and a drain valve assembly 2. The cabinet body 1 includes an upper cabinet body 11 and a lower cabinet body 12, and the upper cabinet body 11 is used to accommodate battery cells. An upper cabinet body bottom plate 111 is provided at the bottom of the upper cabinet body 11, and a drain port 112 is provided on the upper cabinet body bottom plate. The lower cabinet body 12 includes a lower cabinet body bottom plate 121, and a drain valve installation port 122 is provided on the lower cabinet body bottom plate 121. The drain valve assembly 2 is installed at the drain valve installation port 122 and is connected to the drain port 112.

[0040] The battery cabinet is a group of batteries composed of several battery cells, a cabinet body, a battery management system, mounting structures and related functional components, etc., and has a battery cabinet structure that meets the standards, battery cabinet monitoring equipment, battery cabinet connectors, etc. The battery cabinet generally combines multiple battery cells together and is used as a power supply. The types of battery cabinets are distinguished according to the specifications, quantity and placement of the battery cells, and can be divided into vertical, horizontal, etc. The battery cells may include lithium-ion batteries, lithium-sulfur batteries, sodium-ion batteries or magnesium-ion batteries, etc., which are not limited in the embodiments of the present application. The battery management system is a control system that protects the safe use of power batteries, mainly for intelligent management and maintenance of each battery unit, to prevent overcharging and over-discharging of the battery, to extend the service life of the battery, and to monitor the status of the battery. The mounting structures may include brackets and brackets, etc., which are not limited in the embodiments of the present application. Related functional components may include heat dissipation components, cooling components, insulation components and drainage components, etc., which are not limited in the embodiments of the present application.

[0041] The cabinet 1 refers to the main body of the battery cabinet, and the cabinet 1 has space for placing battery cells and other components. The cabinet 1 can be a rectangular cabinet, which is not limited in the embodiments of the present application. The cabinet 1 may include a frame and a top plate, a bottom plate and a side plate covered on the surface of the frame. The top plate, the bottom plate and the side plates may be connected to the frame by welding, riveting, bolts, etc. The top plate, the bottom plate and the side plates may be connected by welding. The interior of the cabinet 1 may be divided into a plurality of parts. For example, the cabinet 1 is divided into an upper cabinet 11 and a lower cabinet 12. The upper cabinet 12 may accommodate a number of battery cells, and the lower cabinet 12 may accommodate pipes or other functional components.

[0042] The bottom plate of the battery cabinet is located at the lower edge of the cabinet body 1 and is the load-bearing component of the battery cabinet. The bottom plate has basic safety properties such as stone impact resistance and scratch resistance. According to the position of the bottom plate in the battery cabinet, it can be divided into an upper cabinet bottom plate 111 and a lower cabinet bottom plate 121. The upper cabinet bottom plate 111 is located at the lower edge of the upper cabinet body 11, and divides the cabinet body 1 into an upper cabinet body 11 and a lower cabinet body 12. The lower cabinet bottom plate 121 is located at the lower edge of the lower cabinet body 12, which separates the interior of the battery cabinet from the external environment, and can prevent external gas, dust, moisture, etc. from entering the battery cabinet.

[0043] The drain valve assembly 2 is an assembly with a drainage function composed of multiple components, and the various components cooperate with each other to achieve one-way sealed drainage. The function of the drain valve assembly 2 is to drain the water accumulated inside the cabinet 1. The drain valve assembly 2 is installed at the drain valve installation port 122 by connecting the bottom plate 24. The upper end of the drain valve assembly 2 is connected to the drain port 112. The number of drain valve assemblies 2 is determined according to the capacity of the battery cabinet and the amount of condensed water discharged, and can be one or more. The battery cabinet generates moisture during use and is deposited on the upper cabinet bottom plate 111. The moisture flows to the drain port 112 due to gravity, and is then discharged to the outside of the battery cabinet through the drain valve assembly 2.

[0044] The drain valve installation port 122 is located on the bottom plate 121 of the lower cabinet body and is used to fix the drain valve assembly 2. The shape of the drain valve installation port 122 can be square or circular, which is not limited in the embodiment of the present application. The number of the drain valve installation port 122 is adapted to the number of the drain valve assembly 2, and can be one or more.

[0045] The connecting bottom plate 24 is a component for connecting the drain valve assembly 2 and the battery cabinet. The connecting bottom plate 24 is welded to the bottom of the frame 23. Figure 5 , a first through hole 241 is provided on the connection bottom plate 24, and a first bolt 1212 can pass through the first through hole 241 to fix the drain valve assembly 2. Specifically, a first nut 1211 is provided on the lower cabinet bottom plate 121. During installation, the drain valve assembly 2 is aligned with the drain valve installation port 122; the first through hole 241 on the connection bottom plate 24 is aligned with the nut bottom hole of the first nut 1211, and the drain valve assembly 2 is fixed to the lower cabinet 12 by the first bolt 1212. Accordingly, during disassembly, the drain valve assembly 2 can be removed by simply loosening the first bolt 1212.

[0046] Further, the first through hole 24 can be set to one or more according to the actual application, and the embodiment of the present application is not limited to this. Considering the space utilization, the first through hole 241 can be set to three. Correspondingly, the number of the first bolts 1212 is also three. The relative positions of the multiple first through holes 241 are set according to the actual application. For example, considering the stability and convenience of installation, the relative positions of the three first through holes 241 are set to a triangle to ensure uniform force and form a stable support.

[0047] The drain port 112 is a through hole located on the bottom plate 111 of the upper cabinet, and the accumulated water flows out of the upper cabinet 111 through the drain port 112. The number, shape and position of the drain port 112 are set according to the actual application. In some embodiments, the number of the drain ports 112 may be one or more; the shape of the drain port 112 may be circular, square or other shapes; the position of the drain port 112 may be set at the edge of the bottom plate 111 of the upper cabinet. After the drain valve assembly 2 is installed, it is connected to the drain port 112, so that the water flows through the drain port 112 and flows into the drain valve assembly 2, preventing the water from penetrating into the lower cabinet 12 and damaging other components in the lower cabinet 12.

[0048] According to an embodiment of the present application, the drain valve assembly 2 is detachably fixed to the bottom plate 121 of the lower cabinet. Compared with the prior art method of installing the drain member from the inside of the battery cabinet, the operation of fixing the drain valve assembly 2 through the drain valve installation port 122 is more convenient and flexible, and the installation can be completed without entering the inside of the battery cabinet. And when removing the drain valve assembly 2, there is no need to move the battery cells in the cabinet. In addition, since the drain valve assembly 2 is installed in the lower cabinet 12, the internal space of the upper cabinet 11 occupied by the drain valve assembly 2 is reduced, so that the upper cabinet 11 can accommodate more battery cells, thereby improving the capacity density of the battery cabinet.

[0049] See also Figure 2 and Figure 3 The drain valve assembly 2 is installed on the drain valve installation port 122 from bottom to top.

[0050] Installation from bottom to top means that the drain valve assembly 2 is fixed through the bottom connection base plate 24, and the top of the drain valve assembly 2 is not connected to the upper cabinet 11. Specifically, the first bolt 1212 first passes through the first through hole 241 on the connection base plate 24 and then connects with the first nut 1211 on the lower cabinet bottom plate 121. The drain valve assembly 2 can be installed on the lower cabinet bottom plate 121 when the cabinet 1 is manufactured, or it can be installed on the lower cabinet bottom plate 121 after the cabinet 1 is manufactured.

[0051] According to the embodiment of the present application, compared with the prior art method of installing the drain member from top to bottom, the drain valve assembly 2 is installed from bottom to top without entering the interior of the lower cabinet 12, which reduces the difficulty of disassembly and assembly. In addition, when the interior space of the lower cabinet 12 is narrow or there are other components blocking it, the installation method from bottom to top is more convenient and feasible.

[0052] See also Figure 5 The drain valve assembly 2 includes a drain valve 21, a mounting plate 22, a frame 23 and a connecting bottom plate 24. The mounting plate 22 is connected to the inner wall of the frame 23, the drain valve 21 is sealedly connected to the mounting plate 22, the connecting bottom plate 24 is arranged at the bottom of the frame 23, and the frame 23 is connected to the bottom surface of the lower cabinet bottom plate 121 through the connecting bottom plate 24.

[0053] Drain valve 21 is a widely used valve in the water industry, used for the discharge of liquid or the control of liquid level, and is mainly used in urban, construction, enterprise water supply and drainage projects, industrial and domestic sewage treatment and water conservancy projects. There are many types of drain valves 21, which can be divided into automatic, power-driven and manual according to the power mode, and can be divided into stop valves, check valves, ball valves, steam traps, etc. according to their uses and functions. Different valves are suitable for different scenarios.

[0054] The frame 23 is a component for accommodating and supporting the drain valve 21, and can connect various components of the drain valve assembly 2. The material of the frame 23 can be a metal alloy, etc., which is not limited in the embodiment of the present application. The shape of the frame 23 can be a cube, which is not limited in the embodiment of the present application.

[0055] The mounting plate 22 is a component for installing and fixing the drain valve 21. The mounting plate 22 is embedded in the frame 23, and the two are welded as one. The drain valve 21 is detachably connected to the mounting plate 22 through the nut bottom hole of the second nut 221. In order to make the installation of the drain valve 21 more stable, in some embodiments, the drain valve assembly 2 also includes an upper pressing plate 27. The upper pressing plate 27 is provided with one or more through holes (not shown in the figure), each through hole is correspondingly installed with a second bolt 222, and a second nut 221 corresponding to the second bolt 222 is provided on the mounting plate 22. The second bolt 222 passes through the through hole of the upper pressing plate 27 and is connected with the second nut 221, so that the upper pressing plate 27 presses the connection between the drain valve 21 and the mounting plate 22. In order to further improve and optimize the waterproof effect, the connection between the side wall of the mounting plate 27 and the frame 23 is coated with waterproof glue to prevent water leakage at the connection gap between the two.

[0056] According to the embodiment of the present application, the drain valve 21 is sealed and connected to the mounting plate 22, the mounting plate 22 is connected to the inner wall of the frame 23, and the bottom of the frame 23 is welded to the connecting bottom plate 24. The frame 23 plays the role of connecting the mounting plate 22 and the connecting bottom plate 24. The mounting plate 22 can install and fix the drain valve 21. The upper pressure plate 27 presses the drain valve 21, improving the sealing performance between the drain valve 21 and the mounting plate 22. The connecting bottom plate 24 realizes the connection between the drain valve assembly 2 and the battery cabinet.

[0057] See also Figure 5 The drain valve assembly 2 also includes a first sealing member 25 , and the drain valve 21 is sealed and connected to the mounting plate 22 via the first sealing member 25 .

[0058] The first seal 25 can be made of elastic materials such as rubber and silicone, and can improve the sealing performance of the connection between the drain valve 21 and the mounting plate 22. Specifically, the drain valve 21 is sealed and connected to the upper surface of the mounting plate 22 through the first seal 25. When the drain valve 21 is assembled on the mounting plate 22, the upper surface of the first seal 25 is tightly attached to the drain valve 21, and the lower surface of the first seal 25 is tightly attached to the upper surface of the mounting plate 22 to form a first layer of sealing, thereby sealing the gap between the drain valve 21 and the mounting plate 22. In order to further improve the sealing effect, the second nut 221 on the mounting plate 22 is preferably a boss nut. When the drain valve 21 is assembled too tightly on the mounting plate 22, the boss may contact the drain valve 21, limit the position of the drain valve 21, and prevent the drain valve 21 from being over-assembled with the mounting plate 22. The first seal 25 is prevented from being crushed when the drain valve 21 is over-assembled with the mounting plate 22, thereby affecting the sealing performance.

[0059] According to the embodiment of the present application, the drain valve 21 is sealed and connected to the mounting plate 22 through the first seal 25, thereby improving the sealing between the drain valve 21 and the mounting plate 22. The boss of the second nut 221 prevents the first seal 25 from being crushed by the drain valve 21.

[0060] See also Figure 5 The drain valve assembly 2 further includes a second sealing member 26 , which is disposed between the connecting bottom plate 24 and the lower cabinet bottom plate 121 .

[0061] The second sealing member 26 can be made of elastic materials such as rubber and silicone, and can improve the sealing performance of the connection between the connecting bottom plate 24 and the lower cabinet bottom plate 121. Specifically, the lower surface of the second sealing member 26 is bonded to the upper surface of the connecting bottom plate 24 by a sealant. The second sealing member 26 is provided with a second through hole 261 concentric with the first through hole 241, and the number and size of the second through hole 261 are adapted to the first through hole 241. When the drain valve assembly 2 is assembled on the lower cabinet bottom plate 121, the upper surface of the second sealing member 26 is tightly attached to the lower surface of the lower cabinet bottom plate 121 to form a second layer of sealing, thereby sealing the gap between the connecting bottom plate 24 and the lower cabinet bottom plate 121. Preferably, the shape of the second sealing member 26 is consistent with that of the connecting bottom plate 24, which can further optimize the sealing effect.

[0062] According to an embodiment of the present application, a second sealing member 26 is disposed between the connecting bottom plate 24 and the lower cabinet bottom plate 121 to improve the sealing performance between the connecting bottom plate 24 and the lower cabinet bottom plate 121 .

[0063] See also Figure 2 , Figure 4 and Figure 6 The upper cabinet bottom plate 111 includes a water guide plate 1111 and a water guide box 1112. The upper end of the water guide box 1112 is connected to the water guide plate 1111, and the lower end of the water guide box 1112 is connected to the drain valve assembly 2.

[0064] The water guide plate 1111 can allow the accumulated water on the upper cabinet bottom plate 111 to flow to the drain port 112 , thereby preventing the accumulated water from gathering at the bottom of the upper cabinet 11 .

[0065] The water guide box 1112 is a component connecting the water guide plate 1111 and the drain valve assembly 2. The upper end of the water guide box 1112 is welded to the water guide plate 1111. The lower end of the water guide box 1112 is connected to the drain valve assembly 2.

[0066] Docking refers to making the ends of the various components contact each other. Specifically, docking refers to the opening at the lower end of the water guide box 1112 corresponding to the opening at the upper end of the drain valve assembly 2, so that the accumulated water can flow into the drain valve assembly 2.

[0067] According to the embodiment of the present application, the water in the cabinet flows along the water guide plate 1111 through the water guide box 1112 to the drain valve assembly 2, and finally discharges from the battery cabinet, thereby realizing one-way sealed drainage.

[0068] See also Figure 2 According to an embodiment of the present application, the water guide box 1112 is arranged on a side of the upper cabinet bottom plate 111 close to the battery cabinet door panel.

[0069] The water guide box 1112 is arranged on a side close to the battery cabinet door panel, and correspondingly, the drain port 112 is arranged on a side close to the battery cabinet door panel on the upper cabinet bottom plate 111, and the drain valve mounting hole 122 is arranged on a side close to the battery cabinet door panel on the lower cabinet bottom plate 121. In some embodiments, the water guide box 112 may be arranged at the left end of a side close to the door panel, which is not limited in this embodiment. When disassembling and assembling the drain valve assembly 2, disassembly and assembly can be completed without going deep into the battery cabinet. Especially for large battery cabinets with a large depth, arranging the water guide box 1112 on a side close to the door panel simplifies the disassembly and assembly steps of the drain valve assembly 2.

[0070] According to an embodiment of the present application, compared with the prior art solution in which the drain port 112 is arranged in the middle of the bottom plate, the water guide box 1112 is arranged on the side close to the battery cabinet door panel to reduce the difficulty of disassembly and assembly of the drain valve assembly 2.

[0071] See also Figure 4 According to an embodiment of the present application, the lower edge of the water guide box 1112 is lower than the upper edge of the frame 23 , so that the frame 23 is sleeved on the water guide box 1112 .

[0072] In order to prevent the water from splashing outside the drain valve assembly 2 when the water flow is large, the lower edge of the water guide box 1112 is lower than the upper edge of the frame 23, so that the frame 23 is sleeved on the water guide box 1112. It can be understood that the water guide box 1112 and the frame 23 overlap each other in the height direction. The length and width of the water guide box 1112 are smaller than the length and width of the frame 23 to achieve a better nesting effect.

[0073] According to an embodiment of the present application, the lower edge of the water guide box 1112 is lower than the upper edge of the frame 23 , which can prevent water from splashing outside the drain valve assembly 2 .

[0074] See also Figure 6 According to an embodiment of the present application, the water guide plate 1111 has a drainage structure. The drainage structure is inclined downward toward the position of the water guide box 1112.

[0075] The drainage structure can make the accumulated water flow smoothly to the drain outlet 112. The drainage structure is inclined toward the water guide box 1112, which means that the water guide plate 111 is inclined toward the position of the water guide box 1112 to form an inclined surface, so that the position of the drain outlet 112 is at the lowest point of the upper cabinet 11, and the accumulated water accumulated on the upper cabinet bottom plate 111 flows to the drain outlet 112 along the inclined surface of the drainage structure under the action of gravity, and is discharged to the outside of the cabinet 1 through the drain valve assembly 2.

[0076] According to an embodiment of the present application, the drainage structure is tilted downward toward the position of the water guide box 1112, so that the accumulated water can flow out of the battery cabinet to the greatest extent.

[0077] See also Figure 7 and Figure 8 According to an embodiment of the present application, the drain valve 21 includes a valve core assembly 211 and a housing 212. The valve core assembly 211 is disposed in the housing 212. The housing 212 is a cylindrical structure, and the top of the cylindrical structure is provided with an outwardly folded edge.

[0078] The drain valve 21 realizes basic functions such as direction control, pressure control or flow control by means of the valve core assembly 211. In the embodiment of the present application, the one-way sealing drainage function of the drain valve 21 is realized by the valve core assembly 211. The drain valve 21 can also be a structure of other forms as long as it can meet the drainage function, such as a spring-type structure.

[0079] The outer shell 212 is a cylindrical structure with an outwardly folded edge at the top, which can be understood as a funnel-like shape that can collect water flow and improve drainage efficiency. The edge of the upper open end of the outer shell 212 is connected to the water guide box 1112, and the inner part of the outer shell 212 has a drainage channel.

[0080] According to an embodiment of the present application, the drain valve 21 includes a valve core assembly 211 and a housing 212. One-way sealed drainage can be achieved through the valve core assembly 211. The outwardly folded edge at the top of the housing 212 is conducive to collecting water flow.

[0081] See also Figure 7 and Figure 8 According to an embodiment of the present application, the valve core assembly 211 includes a metal valve core 2111, a guide rod 2112, and a third sealing member 2113. The metal valve core 2111 is movably sleeved on the guide rod 2112. A magnetic material is provided on the guide rod 2112. The magnetic material generates a magnetic force to close the drain valve 21 by the metal valve core 2111, and to open the drain valve 21 when the downward force on the metal valve core 2111 is greater than a preset value.

[0082] The metal valve core 2111 is the main body of the valve core assembly 211. According to the movement mode of the metal valve core 2111, it can be divided into a rotational type, a translational type, etc. The metal valve core 2111 is arranged on the drainage channel in the housing 212, and the shape of the metal valve core 2111 is adapted to the cross section of the drainage channel of the housing 212, and specifically, the cross section shape can be circular, etc.

[0083] The shape of the guide rod 2112 is adapted to the cross section of the metal valve core 2111. Specifically, the cross section may be circular, etc., so that the metal valve core 2111 can be sleeved on the guide rod 2112. A magnetic material, specifically a magnet, etc., is provided on the upper end of the guide rod 2112. The magnetic material can generate an upward magnetic force on the metal valve core 2111, so that the metal valve core 2111 seals the drainage channel.

[0084] The third sealing member 2113 can be made of elastic materials such as rubber, silicone, etc. Figure 7 When the metal valve core 2111 is in the closed state, the third sealing member 2113 can improve the connection sealing between the metal valve core 2111 and the housing 212. Specifically, when the metal valve core 2111 is in the closed state, the upper surface of the third sealing member 2113 is in close contact with the lower edge of the housing 212, thereby closing the gap between the metal valve core 2111 and the sealing housing 212, and realizing the third layer of sealing.

[0085] "Moveably sleeved" means that the metal valve core 2111 is movable inside the housing 212. Specifically, when the metal valve core 2111 moves upward to the first state (i.e., the drain valve 21 is closed) under the action of the magnetic force of the magnetic material, the valve core assembly 211 seals the drain channel; when the metal valve core 2111 is subjected to a downward force greater than a preset value from the accumulated water, the metal valve core 2111 moves downward to the second state (i.e., the drain valve 21 is open), thereby opening the drain valve 21 for drainage. Figure 8 The direction of the middle arrow indicates the direction of water flow. After the accumulated water is drained, the metal valve core 2111 moves upward again under the action of the magnetic force of the magnetic material and returns to the first state, thereby sealing the drainage channel.

[0086] In addition, when an unexpected situation such as thermal runaway occurs inside the battery cabinet, when the air pressure inside the cabinet body 1 reaches a certain threshold, the metal valve core 2111 can automatically open to release the pressure to prevent accidents.

[0087] According to an embodiment of the present application, the valve core assembly 211 includes a metal valve core 2111, a guide rod 2112 and a sealing rubber 2113. When the downward force applied to the metal valve core 2111 is greater than a preset value, the drain valve 21 is opened to achieve automatic drainage. The magnetic material on the guide rod 2112 generates a magnetic force to cause the metal valve core 2111 to close the drain valve 21. Existing spring-type drainage assemblies are prone to rust during use, and are prone to drainage or sealing failures. In an embodiment of the present application, automatic drainage can be accurately achieved by controlling the opening and closing of the valve core assembly 211 through magnetic material, and the third sealing member 2113 can improve the sealing performance of the valve core assembly 211.

[0088] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery cabinet, characterized in that: include: A cabinet, wherein the cabinet comprises an upper cabinet and a lower cabinet, wherein the upper cabinet is used to accommodate battery cells, wherein an upper cabinet bottom plate is provided at the bottom of the upper cabinet, wherein a drain port is provided on the upper cabinet bottom plate; wherein the lower cabinet comprises a lower cabinet bottom plate, wherein a drain valve installation port is provided on the lower cabinet bottom plate; A drain valve assembly is installed on the drain valve installation port from bottom to top and is connected to the drain port so as to be used for one-way sealed drainage through the drain valve installation port toward the outside of the cabinet.

2. The battery cabinet according to claim 1, characterized in that: The drain valve assembly includes a drain valve, a mounting plate, a frame and a connecting bottom plate; the mounting plate is connected to the inner wall of the frame; the drain valve is sealed and connected to the mounting plate; the connecting bottom plate is arranged at the bottom of the frame; the frame is connected to the bottom surface of the lower cabinet bottom plate through the connecting bottom plate.

3. The battery cabinet according to claim 1 or 2, characterized in that: The drain valve assembly further includes a first sealing member, through which the drain valve is sealed and connected to the mounting plate.

4. The battery cabinet according to any one of claims 1 to 3, characterized in that: The drain valve assembly further includes a second sealing member, which is disposed between the connecting bottom plate and the lower cabinet bottom plate.

5. The battery cabinet according to claim 1, characterized in that: The upper cabinet bottom plate includes a water guide plate and a water guide box; the upper end of the water guide box is connected to the water guide plate; and the lower end of the water guide box is connected to the drain valve assembly.

6. The battery cabinet according to claim 5, characterized in that: The water guide box is arranged on a side of the upper cabinet bottom plate close to the battery cabinet door plate.

7. The battery cabinet according to claim 5 or 6, characterized in that: The lower edge of the water guide box is lower than the upper edge of the frame, so that the frame is sleeved on the water guide box.

8. The battery cabinet according to claim 5, characterized in that: The water guide plate has a drainage structure; the drainage structure is inclined downward toward the position of the water guide box.

9. The battery cabinet according to claim 1, characterized in that: The drain valve comprises a valve core assembly and a shell; the valve core assembly is arranged in the shell; the shell is a cylindrical structure, and the top of the cylindrical structure is provided with an outwardly folded edge.

10. The battery cabinet according to claim 9, characterized in that: The valve core assembly includes a metal valve core, a guide rod and a third sealing member; the metal valve core can be movably mounted on the guide rod; a magnetic material is provided on the guide rod; the magnetic material generates a magnetic force to cause the metal valve core to close the drain valve, and to open the drain valve when the downward force applied to the metal valve core is greater than a preset value.

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