Valve opening device and vacuum oven

Abstract

The utility model discloses a valve opening device and a vacuum oven. The valve opening device comprises a lifting assembly, a supporting assembly and a valve opening assembly, the supporting assembly is arranged on the lifting assembly, and the lifting assembly is used for driving the supporting assembly to move in the first direction; one end of the valve opening assembly in the first direction is connected to the supporting assembly, and the other end is in contact with a valve body of a liquid injection hole of the battery monomer. The switch valve of the liquid injection hole can be opened through the acting force of the valve opening assembly on the valve body, so that the interior of the shell of the battery monomer is communicated with the cavity of the vacuum oven, the drying of the battery monomer in a vacuum environment is realized, and the production efficiency of the battery monomer is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a valve opening device and a vacuum oven. Background Art

[0002] Battery cells are widely used in electronic devices, such as mobile phones, laptop computers, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and electric tools, etc. Battery cells can include nickel-cadmium battery cells, nickel-hydrogen battery cells, lithium-ion battery cells, and secondary alkaline zinc-manganese battery cells, etc.

[0003] At present, vacuum ovens are mainly used for battery cells with open injection holes. For battery cells with switch valves at the injection holes, there is a lack of valve opening devices, which reduces the production efficiency of battery cells. Utility Model Content

[0004] The embodiments of the present application provide a valve opening device and a vacuum oven, which can improve the production efficiency of battery cells.

[0005] In a first aspect, an embodiment of the present application provides a valve opening device, which includes a lifting assembly, a support assembly and a valve opening assembly, wherein the support assembly is arranged on the lifting assembly, and the lifting assembly is used to drive the support assembly to move along a first direction; one end of the valve opening assembly along the first direction is connected to the support assembly, and the other end is used to contact the valve body of the liquid injection hole of the battery cell.

[0006] In the above scheme, the support assembly is driven to move in the first direction by the lifting assembly, and the valve opening assembly can follow the movement of the support assembly, thereby contacting the valve body of the injection hole of the battery cell. The on-off valve of the injection hole can be opened by the force of the valve opening assembly on the valve body, so that the interior of the battery cell shell is connected to the chamber of the vacuum oven, thereby realizing the drying of the battery cell in a vacuum environment, thereby improving the production efficiency of the battery cell.

[0007] In some embodiments, the support assembly includes a frame and a support member, the frame is connected to the lifting assembly; both ends of the support member are respectively connected to the frame, and the valve opening assembly is movably arranged on the support member along the second direction; wherein the first direction is arranged to intersect with the second direction.

[0008] In the above solution, the position of the valve opening assembly can be adjusted along the second direction to adapt to different battery cells.

[0009] In some embodiments, a plurality of valve opening assemblies are disposed on the support member.

[0010] By providing a plurality of valve opening assemblies, valves of a plurality of battery cells can be opened simultaneously, thereby further improving the production efficiency of the battery cells.

[0011] In some embodiments, there are multiple support members, and the multiple support members are arranged at intervals along the third direction; wherein the third direction is arranged to intersect with the first direction and the second direction respectively.

[0012] By arranging a plurality of support members along the third direction, the number of valve opening assemblies is increased, and the production efficiency of battery cells is further improved.

[0013] In some embodiments, the support is movably connected to the frame along a third direction.

[0014] In the above solution, the support member can move along the third direction to adapt to battery cells of different sizes.

[0015] In some embodiments, the lifting assembly includes a fixed rod and a lifting guide rod, the fixed rod extends along a first direction; the lifting guide rod is slidably disposed on the fixed rod along the first direction, and the support assembly is connected to the lifting guide rod.

[0016] In the above solution, the stability of the valve opening assembly when sliding along the first direction can be improved by sliding the lifting guide rod relative to the fixed rod along the first direction.

[0017] In some embodiments, the end of the valve opening assembly away from the support assembly includes an inner recess and an outer portion, the outer portion is arranged on the periphery of the inner recess, and the end of the outer portion away from the support assembly is convex relative to the end of the inner recess away from the support assembly.

[0018] In the above solution, the inner recessed portion is used to contact the valve body, and the protruding outer peripheral portion can be used to abut against the end cover to limit the valve opening stroke and prevent the switch valve from being damaged to a certain extent.

[0019] In some embodiments, a groove is provided at one end of the inner recess away from the supporting assembly, and a notch communicating with the groove is provided at the outer peripheral portion.

[0020] In the above scheme, when heated, the gas inside the battery cell shell can flow to the vacuum cavity through the grooves and notches, thereby achieving vacuum drying.

[0021] In some embodiments, the valve opening assembly includes a connecting part, an elastic part and a telescopic rod, the connecting part is connected to the supporting assembly; the elastic part is telescopically arranged on the connecting part along a first direction; the telescopic rod is arranged at one end of the elastic part away from the connecting part, and the telescopic rod is used to contact the valve body of the liquid injection hole of the battery cell.

[0022] In the above solution, the telescopic portion can be extended and retracted along the first direction to adapt to the height movement of the battery cell, thereby improving the valve opening accuracy of the valve opening device.

[0023] In some embodiments, the connecting portion is disposed around the outer circumference of the elastic portion, and a portion of the telescopic rod is located inside the connecting portion.

[0024] In the above solution, the elastic part and the telescopic rod are protected by the connecting part, thereby improving the reliability of the valve opening assembly.

[0025] In a second aspect, an embodiment of the present application provides a vacuum oven, comprising a box body and a valve opening device according to any of the above embodiments. The box body is provided with a vacuum cavity; and the valve opening device is provided in the vacuum cavity.

[0026] In some embodiments, a position sensor is provided on the box body, and the position sensor is used to determine the position of the valve opening component of the valve opening device.

[0027] In the above scheme, the lifting stroke of the valve opening component can be monitored by the in-position sensor, thereby further improving the valve opening accuracy of the valve opening device.

[0028] 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 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

[0029] 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 these drawings without paying creative work.

[0030] Figure 1 An exploded schematic diagram of a battery according to some embodiments of the present application;

[0031] Figure 2 This is a schematic diagram of the structure of the valve opening device in some embodiments of the present application;

[0032] Figure 3 This is a schematic diagram of the structure of a vacuum oven in some embodiments of the present application;

[0033] Figure 4 This is a schematic diagram of the structure of the switch valve of the injection hole in some embodiments of the present application when the valve is not opened;

[0034] Figure 5 This is a schematic structural diagram of the on-off valve of the injection hole in some embodiments of the present application having been opened;

[0035] Figure 6 This is a schematic diagram of the structure of the valve opening device in some embodiments of the present application;

[0036] Figure 7 This is a schematic diagram of the structure of the valve opening assembly of some embodiments of the present application;

[0037] Figure 8 This is a partial structural schematic diagram of the valve opening assembly of some embodiments of the present application.

[0038] Description of reference numerals:

[0039] 20. Battery cell; 21. End cover; 22. Shell; 23. Electrode assembly; 26. Electrode terminal; 27. Liquid injection hole; 28. Switch valve; 281. Valve body; 282. Valve sleeve; 283. Fixed section; 284. Telescopic section; 285. Sealing section; 100. Valve opening device; 10. Lifting assembly; 11. Fixed rod; 12. Lifting guide rod; 30. Support assembly; 31. Frame; 32. Support member; 40. Valve opening assembly; 41. Recessed portion; 411. Groove; 42. Outer portion; 421. Notch; 43. Connecting portion; 44. Elastic portion; 45. Telescopic rod; 1000. Vacuum oven; Box 200; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] In the present application, battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries or magnesium-ion batteries, etc., and the embodiments of the present application do not limit this. Battery cells may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this.

[0045] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery generally includes a box for encapsulating one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0046] The battery cell includes an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode current collector. The current collector not coated with the positive electrode active material layer protrudes from the current collector coated with the positive electrode active material layer. The current collector not coated with the positive electrode active material layer is stacked as a positive electrode tab. Taking lithium-ion batteries as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The current collector not coated with the negative electrode active material layer protrudes from the current collector coated with the negative electrode active material layer. The current collector not coated with the negative electrode active material layer is stacked as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon. The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a winding structure or a stacked structure, but the embodiments of the present application are not limited thereto.

[0047] Please refer to Figure 1 , Figure 1 The schematic diagram of the exploded structure of the battery cell 20 provided in some embodiments of the present application. The battery cell 20 refers to the smallest unit that constitutes the battery. Figure 1 The battery cell 20 includes an end cover 21, a shell 22, an electrode assembly 23 and other functional components.

[0048] The end cap 21 refers to a component that covers the opening of the shell 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 21 can be adapted to the shape of the shell 22 to match the shell 22. Optionally, the end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 21 is not easily deformed when squeezed and collided, so that the battery cell 20 can have a higher structural strength and reliability can also be improved. Functional components such as electrode terminals 26 can be provided on the end cap 21. The electrode terminal 26 can be used to electrically connect to the electrode assembly 23 for outputting or inputting electrical energy of the battery cell 20. In some embodiments, the end cap 21 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The material of the end cap 21 includes but is not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating member may be provided inside the end cap 21, and the insulating member may be used to isolate the electrical connection components in the housing 22 from the end cap 21 to reduce the risk of short circuit. For example, the insulating member may be plastic, rubber, or the like.

[0049] The shell 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. The formed internal environment can be used to accommodate the electrode assembly 23, the electrolyte and other components. The shell 22 and the end cap 21 can be independent components. An opening can be set on the shell 22, and the internal environment of the battery cell 20 is formed by covering the opening with the end cap 21 at the opening. In some examples, the shell 22 is a hollow structure with an opening on one side, and the end cap 21 is one and covers the opening of the shell 22. In other examples, the shell 22 is a hollow structure with openings on both sides, and there are two end caps 21, and the two end caps 21 cover the two openings of the shell 22 respectively. Without limitation, the end cap 21 and the shell 22 can also be integrated. Specifically, the end cap 21 and the shell 22 can form a common connection surface before other components are put into the shell, and when it is necessary to encapsulate the interior of the shell 22, the end cap 21 covers the shell 22. The shell 22 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 22 can be determined according to the specific shape and size of the electrode assembly 23. The shell 22 can be made of a variety of materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, and the like.

[0050] Each battery cell 20 can be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 can be cylindrical, flat, rectangular, or in other shapes.

[0051] During the manufacturing process of battery cells, there is usually some air, moisture and other gases inside the battery cells. These gases may have a negative impact on the performance and life of the battery cells. By placing them in a vacuum oven and evacuating them, these gases can be effectively removed to ensure that the interior of the battery cell is a relatively dry and gas-free environment. After evacuating the vacuum oven, the electrolyte can be promoted to better penetrate into the microscopic gaps of the positive and negative electrode materials of the battery cells, which helps to improve the performance and efficiency of the battery cells. At present, conventional vacuum ovens are mainly aimed at battery cells with open injection holes, but for battery cells with a switch valve in the injection hole, it is necessary to open the switch valve first, and then perform the heating and vacuuming steps. Due to the lack of a valve opening device, the production efficiency of the battery cell is reduced.

[0052] In view of this, the present application provides a technical solution, in which the support assembly is driven to move in a first direction by a lifting assembly, and the valve opening assembly can follow the movement of the support assembly, thereby contacting the valve body of the injection hole of the battery cell. The on-off valve of the injection hole can be opened by the force of the valve opening assembly on the valve body, so that the interior of the battery cell shell is connected to the chamber of the vacuum oven, thereby realizing the drying of the battery cell in a vacuum environment, thereby improving the production efficiency of the battery cell.

[0053] Figure 2 This is a schematic diagram of the structure of the valve opening device in some embodiments of the present application; Figure 3 This is a schematic diagram of the structure of a vacuum oven according to some embodiments of the present application.

[0054] Please combine Figure 2 and Figure 3 In the first aspect, an embodiment of the present application provides a valve opening device 100, which includes a lifting assembly 10, a support assembly 30 and a valve opening assembly 40. The support assembly 30 is arranged on the lifting assembly 10, and the lifting assembly 10 is used to drive the support assembly 30 to move along the first direction X; one end of the valve opening assembly 40 along the first direction X is connected to the support assembly 30, and the other end is used to contact the valve body 281 of the injection hole 27 of the battery cell 20.

[0055] The valve opening device 100 is disposed in the vacuum chamber of the vacuum oven 1000. The lifting assembly 10 can drive the support assembly 30 to move along the first direction X by various methods such as a cylinder, an electric cylinder, a cam, a connecting rod, a gear, etc. The support assembly 30 can be a frame 31 structure or a plate structure. The first direction X can be the height direction of the battery cell 20.

[0056] Figure 4 This is a schematic diagram of the structure of the switch valve of the injection hole in some embodiments of the present application when the valve is not opened; Figure 5 This is a schematic structural diagram of the switch valve of the injection hole in some embodiments of the present application with the valve opened.

[0057] Please refer to Figure 4 and Figure 5 The switch valve 28 in the injection hole 27 of the battery cell 20 may include a valve body 281 and a valve sleeve 282, the valve body 281 is inserted into the valve sleeve 282, the valve sleeve 282 includes a fixed section 283, a telescopic section 284 and a sealing section 285 connected in sequence, and the fixed section 283 is fixed to the portion of the end cover 21 along the edge of the injection hole 27. When the switch valve 28 is in a closed state, the telescopic section 284 is in a compressed state, the sealing section 285 is close to the fixed section 283, and the sealing section 285 contacts the end cover 21 to seal the injection hole 27. When the lifting assembly 10 drives the supporting assembly 30 to move downward, the valve opening assembly 40 contacts the valve body 281 and generates a downward force on the valve body 281. The valve body 281 exerts a downward force on the sealing section 285, causing the telescopic section 284 to gradually extend, and the sealing section 285 gradually moves away from the fixed section 283. The sealing section 285 detaches from the end cover 21, exposing the through hole of the telescopic section 284. The gas inside the shell 22 can enter the through hole of the valve body 281 through the through hole of the telescopic section 284, and then flow out to the outside of the shell 22.

[0058] When baking is completed, the valve assembly 40 moves upward, and the valve device 100 is in place before the vacuum breaking step is performed, which ensures that the switch valve 28 of the battery cell 20 is in a closed state to a certain extent, and the interior of the battery cell 20 is in a vacuum state, and then gas is flushed into the vacuum cavity to break the vacuum to normal pressure.

[0059] In the above scheme, the lifting assembly 10 drives the support assembly 30 to move along the first direction X, and the valve opening assembly 40 can move with the support assembly 30, so as to contact the valve body 281 of the injection hole 27 of the battery cell 20. The switch valve 28 of the injection hole 27 can be opened by the force of the valve opening assembly 40 on the valve body 281, so that the interior of the shell 22 of the battery cell 20 is connected with the chamber of the vacuum oven 1000, thereby realizing the drying of the battery cell 20 in a vacuum environment, thereby improving the production efficiency of the battery cell 20.

[0060] Figure 6 This is a schematic diagram of the structure of the valve opening device of some embodiments of the present application.

[0061] like Figure 6As shown, in some embodiments, the support assembly 30 includes a frame 31 and a support member 32, the frame 31 is connected to the lifting assembly 10; both ends of the support member 32 are respectively connected to the frame 31, and the valve opening assembly 40 is movably disposed on the support member 32 along the second direction Y; wherein the first direction X and the second direction Y are intersected.

[0062] The frame 31 may be rectangular, square or other polygonal shapes. The support member 32 may be a support rod, a support column or other structures. The second direction Y may be the thickness direction of the battery cell 20. The valve assembly 40 may be movably connected to the support member 32 by means of a slider, a buckle or the like. The position of the valve assembly 40 may be adjusted along the second direction Y for battery cells 20 of different thicknesses.

[0063] In the above solution, the position of the valve opening assembly 40 can be adjusted along the second direction Y to adapt to different battery cells 20 .

[0064] In some embodiments, a plurality of valve opening assemblies 40 are disposed on the support member 32 .

[0065] The plurality of valve opening assemblies 40 may be arranged at intervals, and the plurality of valve opening assemblies 40 may all be movable along the first direction X, so that the intervals between adjacent valve opening assemblies 40 may be adjusted to accommodate battery cells 20 of different thicknesses.

[0066] The embodiment of the present application provides a plurality of valve opening assemblies 40 , so that valves of a plurality of battery cells 20 can be opened simultaneously, thereby further improving the production efficiency of the battery cells 20 .

[0067] In some embodiments, there are multiple support members 32 , and the multiple support members 32 are arranged at intervals along the third direction Z; wherein the third direction Z is arranged to intersect with the first direction X and the second direction Y respectively.

[0068] The third direction Z may be the length direction of the battery cell 20 . In the embodiment of the present application, a plurality of support members 32 are arranged along the third direction Z, thereby increasing the number of valve opening assemblies 40 and further improving the production efficiency of the battery cell 20 .

[0069] In some embodiments, the support member 32 is movably connected to the frame 31 along the third direction Z.

[0070] The support member 32 can be connected to the frame 31 by means of a slider, a buckle, etc., so that the support member 32 can move along the third direction Z. For battery cells 20 of different lengths, the position of each support member 32 can be adjusted so that the valve opening assembly 40 can be located just above the injection hole 27.

[0071] In the above solution, the support member 32 can move along the third direction Z to adapt to battery cells 20 of different sizes.

[0072] In some embodiments, the lifting assembly 10 includes a fixed rod 11 and a lifting guide rod 12 , the fixed rod 11 extends along a first direction X; the lifting guide rod 12 is slidably disposed on the fixed rod 11 along the first direction X, and the support assembly 30 is connected to the lifting guide rod 12 .

[0073] A pneumatic cylinder, an electric cylinder or the like may be used to connect with the lifting guide rod 12 to drive the lifting guide rod 12 to slide along the fixed rod 11. Lifting assemblies 10 may be respectively arranged at multiple corner regions of the frame 31 of the support assembly 30, so that the support assembly 30 is supported by the lifting assemblies 10, and the multiple lifting assemblies 10 can smoothly drive the support assembly 30 to move along the first direction X.

[0074] In the above solution, the lifting guide rod 12 slides along the first direction X relative to the fixed rod 11, so that the stability of the valve opening assembly 40 when sliding along the first direction X can be improved.

[0075] Figure 7 This is a schematic diagram of the structure of the valve opening assembly of some embodiments of the present application; Figure 8 This is a partial structural schematic diagram of the valve opening assembly of some embodiments of the present application.

[0076] Please refer to Figure 7 and Figure 8 In some embodiments, the end of the valve opening assembly 40 away from the support assembly 30 includes an inner recess 41 and an outer portion 42, the outer portion 42 is arranged on the outer periphery of the inner recess 41, and the end of the outer portion 42 away from the support assembly 30 is protruding relative to the end of the inner recess 41 away from the support assembly 30.

[0077] After the battery cell 20 enters the vacuum oven 1000, the support assembly 30 descends and drives the valve opening assembly 40 to move downward, the inner recess 41 squeezes the valve body 281, the valve body 281 presses down the valve sleeve 282 to open the valve, and the valve opening assembly 40 moves further downward, and the outer portion 42 of the valve opening assembly 40 contacts the end cover 21. The deformation of the telescopic section 284 of the valve sleeve 282 fully meets the valve opening requirement. The valve opening stroke of the switch valve 28 is determined by the depth of the inner recess 41 of the valve opening assembly 40 relative to the outer portion 42. When the valve is opened, the outer portion 42 contacts the end cover 21.

[0078] The outer diameter of the inner recess 41 is larger than the outer diameter of the valve body 281 , so as to accommodate the position deviation of the valve body 281 caused by the position fluctuation of the battery cell 20 .

[0079] In the above solution, the inner recessed portion 41 is used to contact the valve body 281, and the protruding outer portion 42 can be used to abut against the end cover 21 to limit the valve opening stroke and prevent the switch valve 28 from being damaged to a certain extent.

[0080] In some embodiments, a groove 411 is disposed at one end of the inner recess 41 away from the supporting assembly 30 , and a notch 421 communicating with the groove 411 is disposed at the outer peripheral portion 42 .

[0081] A plurality of grooves 411 may be provided at the end of the inner recess 41, and the grooves 411 penetrate the inner recess 41 and communicate with the notches 421. When heated, the gas inside the housing 22 of the battery cell 20 may flow to the vacuum chamber through the grooves 411 and the notches 421, thereby achieving vacuum drying.

[0082] In some embodiments, the valve opening assembly 40 includes a connecting portion 43, an elastic portion 44 and a telescopic rod 45, the connecting portion 43 is connected to the supporting assembly 30; the elastic portion 44 is telescopically arranged on the connecting portion 43 along the first direction X; the telescopic rod 45 is arranged at one end of the elastic portion 44 away from the connecting portion 43, and the telescopic rod 45 is used to contact the valve body 281 of the injection hole 27 of the battery cell 20.

[0083] The elastic part 44 can be a structure that can be deformed, such as a spring. In order to accommodate the height differences of the battery cell 20, the valve body 281, etc., after the outer portion 42 of the valve opening assembly 40 contacts the end cover 21, the valve opening assembly 40 continues to move downward for a distance. Since the elastic part 44 has a certain amount of compression, the overpressure of the valve opening assembly 40 can be absorbed by the elastic part 44, and the effective compression of the elastic part 44 is greater than the maximum overpressure of the valve opening assembly 40. When the stroke of the switch valve 28 meets the requirements, the pressure of the valve opening assembly 40 is greater than the maximum rebound force of the valve sleeve 282.

[0084] In the above solution, the telescopic portion can be extended and retracted along the first direction X to adapt to the height movement of the battery cell 20 , thereby improving the valve opening accuracy of the valve opening device 100 .

[0085] In some embodiments, the connection portion 43 is disposed around the outer circumference of the elastic portion 44 , and a portion of the telescopic rod 45 is located inside the connection portion 43 .

[0086] The connecting portion 43 is in the shape of a sleeve, the elastic portion 44 is received inside the connecting portion 43, a part of the telescopic rod 45 is received inside the connecting portion 43, and the other part extends out of the connecting portion 43. The elastic portion 44 and the telescopic rod 45 are protected by the connecting portion 43, thereby improving the reliability of the valve opening assembly 40.

[0087] In a second aspect, the embodiment of the present application provides a vacuum oven 1000, comprising a box body and a valve opening device 100 of any of the above embodiments. The box body is provided with a vacuum cavity; the valve opening device 100 is provided in the vacuum cavity.

[0088] In some embodiments, a position sensor is disposed on the box body, and the position sensor is used to determine the position of the valve opening component 40 of the valve opening device 100.

[0089] The in-position sensor is a device for detecting whether an object has reached a set position and outputting a signal, and is also called a position sensor, a limiter, etc. The in-position sensor can monitor the lifting stroke of the valve opening assembly 40, thereby further improving the valve opening accuracy of the valve opening device 100.

[0090] According to some embodiments of the present application, the present application provides a valve opening device 100, which includes a lifting assembly 10, a support assembly 30 and a valve opening assembly 40. The support assembly 30 is arranged on the lifting assembly 10, and the lifting assembly 10 is used to drive the support assembly 30 to move along the first direction X; one end of the valve opening assembly 40 along the first direction X is connected to the support assembly 30, and the other end is used to contact the valve body 281 of the injection hole 27 of the battery cell 20. The end of the valve opening assembly 40 away from the support assembly 30 includes an inner recess 41 and an outer peripheral portion 42, and the outer peripheral portion 42 is arranged on the outer periphery of the inner recess 41, and the end of the outer peripheral portion 42 away from the support assembly 30 is convex relative to the end of the inner recess 41 away from the support assembly 30.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A valve opening device, characterized in that: include: Lifting components; A support assembly, disposed on the lifting assembly, and the lifting assembly is used to drive the support assembly to move along a first direction; A valve opening assembly, wherein one end of the valve opening assembly along the first direction is connected to the support assembly, and the other end is used to contact the valve body of the liquid injection hole of the battery cell.

2. The valve opening device according to claim 1, characterized in that: The support assembly comprises: A frame connected to the lifting assembly; A support member, both ends of which are respectively connected to the frame, and the valve opening assembly is movably arranged on the support member along a second direction; wherein the first direction is arranged to intersect with the second direction.

3. The valve opening device according to claim 2, characterized in that: A plurality of the valve opening assemblies are arranged on the support member.

4. The valve opening device according to claim 2, characterized in that: There are multiple support members, and the multiple support members are arranged at intervals along the third direction; wherein the third direction is arranged to intersect with the first direction and the second direction respectively.

5. The valve opening device according to claim 4, characterized in that: The support member is movably connected to the frame along the third direction.

6. The valve opening device according to claim 1, characterized in that: The lifting assembly comprises: A fixed rod extending along a first direction; The lifting guide rod is slidably arranged on the fixing rod along the first direction, and the supporting assembly is connected to the lifting guide rod.

7. The valve opening device according to claim 1, characterized in that: The end of the valve opening assembly away from the support assembly includes: inner concave part; The peripheral portion is arranged at the outer periphery of the inner recess, and one end of the peripheral portion away from the support component is convexly arranged relative to one end of the inner recess away from the support component.

8. The valve opening device according to claim 7, characterized in that: A groove is arranged at one end of the inner recessed portion away from the supporting assembly, and a notch communicating with the groove is arranged at the outer peripheral portion.

9. The valve opening device according to claim 1, characterized in that: The valve opening assembly comprises: A connecting portion connected to the supporting assembly; an elastic portion, telescopically disposed on the connecting portion along the first direction; The telescopic rod is arranged at one end of the elastic part away from the connecting part, and the telescopic rod is used to contact the valve body of the liquid injection hole of the battery cell.

10. The valve opening device according to claim 9, characterized in that: The connecting portion is disposed around the outer circumference of the elastic portion, and a portion of the telescopic rod is located inside the connecting portion.

11. A vacuum oven, characterized in that: include: A box body is provided with a vacuum cavity; as well as, According to any one of claims 1 to 10, the valve opening device is arranged in the vacuum chamber.

12. The vacuum oven according to claim 11, characterized in that: The box body is provided with a position sensor, and the position sensor is used to judge the position of the valve opening component of the valve opening device.

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