Air extractor, battery formation system and battery production equipment

Abstract

The utility model discloses an air extractor, a battery formation system and battery production equipment. The air extractor comprises a supporting frame, a storage assembly and a plurality of suction assemblies, the supporting frame comprises a main body part and a bottom plate assembly which are connected with each other, and the bottom plate assembly is provided with a plurality of limiting holes formed in the first direction at intervals; the storage assembly is arranged on the supporting frame and comprises a storage cavity. Each suction assembly comprises a connecting pipe and a suction part, the flexible connecting pipe communicates between the suction part and the storage cavity, the multiple suction assemblies penetrate through the multiple limiting holes correspondingly, and at least one suction part can move in the limiting holes in the first direction. According to the air extractor, the machining efficiency can be improved, and the machining cost can be reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to an exhaust device, a battery formation system and a battery production equipment. Background Art

[0002] With the development of new energy technology, batteries are used more and more widely, for example, in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc.

[0003] The development of battery technology must take into account many design factors at the same time. For example, how to improve battery production efficiency and reduce battery production costs is an important research direction in the battery field. Utility Model Content

[0004] The present application provides an exhaust device, a battery formation system and a battery production equipment, which can improve processing efficiency and reduce processing costs.

[0005] In the first aspect, the present application provides an exhaust device, comprising a support frame, a storage component and a plurality of suction components, the support frame comprising a main body and a bottom plate component connected to each other, the bottom plate component being provided with a plurality of limit holes spaced apart along a first direction; the storage component being arranged on the support frame and comprising a storage cavity; each suction component comprising a connecting pipe and a suction part, the connecting pipe being connected between the suction part and the storage cavity, the plurality of suction components respectively passing through the plurality of limit holes, and at least one suction part being able to move along the first direction within the limit hole.

[0006] In the technical solution of the embodiment of the present application, the vacuum device includes a support frame that provides support and fixing functions, a storage component for storing extracted gas or liquid, and a suction component for vacuuming, wherein the bottom plate component in the support frame is provided with a plurality of limiting holes, the suction component passes through the limiting holes and can move in the holes along a first direction, and by moving the suction component within the preset hole range, the position of at least part of the suction component and the spacing between adjacent suction components can be flexibly adjusted, so that the vacuum device can adapt to battery cells of various sizes and arrangements.

[0007] According to some embodiments of the present application, the suction part includes a suction pipe and a suction nozzle, the suction pipe is connected between the connecting pipe and the suction nozzle; the suction assembly also includes a first positioning plate and a second positioning plate, the first positioning plate and the second positioning plate are respectively sleeved on the suction pipe and spaced apart from each other in the thickness direction of the bottom plate assembly, and the first positioning plate and the second positioning plate are respectively abutted against two opposite sides of the bottom plate assembly in the thickness direction. The positioning plates sandwiched on both sides prevent the suction assembly from slipping out of the limiting hole, thereby improving the reliability of the air extraction device.

[0008] According to some embodiments of the present application, the suction assembly further includes a limiting ring and a first elastic member, the limiting ring is connected to the suction pipe and is located on the side of the first positioning plate away from the second positioning plate, and the first elastic member is sleeved on the suction pipe and clamped between the limiting ring and the first positioning plate, so that the suction assembly can automatically reset after being dragged downward and changed position.

[0009] According to some embodiments of the present application, the suction assembly further includes a second elastic member, which is sleeved on the suction tube and clamped between the second positioning plate and the suction nozzle, thereby reducing the pressure on the battery cell during the process of the suction assembly being pressed against the battery cell and performing suction, thereby reducing the possibility of the battery cell being damaged by pressure.

[0010] According to some embodiments of the present application, the first positioning plate and the second positioning plate are respectively provided with a first through hole and a second through hole penetrating in the thickness direction, and the suction pipe passes through the first through hole and the second through hole; the hole walls of the first through hole and the second through hole are respectively provided with at least one first positioning groove and at least one second positioning groove, the first positioning groove and the second positioning groove both extend in the thickness direction and their orthographic projections in the thickness direction at least partially overlap, and the suction pipe is provided with a protrusion, which passes through the first positioning groove and the second positioning groove. The possibility of the suction assembly rotating in its own circumference is reduced, and the alignment accuracy of the suction assembly and the battery cell during air extraction is improved.

[0011] According to some embodiments of the present application, in the thickness direction, the extension dimension of the protrusion is larger than the extension dimension of the first positioning groove and the extension dimension of the second positioning groove, thereby reducing the possibility of the protrusion slipping out of the positioning groove during the pull-down switching process.

[0012] According to some embodiments of the present application, the bottom plate assembly is provided with a plurality of third positioning grooves arranged at intervals along the first direction, and the second positioning plate is provided with a positioning portion protruding in a direction close to the bottom plate assembly, and the positioning portion extends into the third positioning groove, so as to facilitate the positioning of the suction assembly and reduce the possibility of the suction assembly sliding during operation.

[0013] According to some embodiments of the present application, in the thickness direction, the orthographic projection of at least part of the limiting hole covers the orthographic projection of multiple third positioning grooves. The same limiting hole can correspond to multiple third limiting grooves, so that the suction assembly in the limiting hole has multiple replaceable positions.

[0014] According to some embodiments of the embodiments of the present application, the plurality of limiting holes include a first limiting hole and a second limiting hole, and in the first direction, the extension dimension of the first limiting hole is greater than the extension dimension of the second limiting hole; in the thickness direction, the orthographic projection of the first limiting hole covers the orthographic projections of the two third positioning grooves, and the orthographic projection of the second limiting hole is arranged in a one-to-one correspondence with the third positioning grooves. The limiting holes can be arranged to be partially wider and partially narrower, the suction assembly in the wide hole can be transposed, and the suction assembly in the narrow hole is fixed in position, so as to improve reliability on the basis of flexible adjustment.

[0015] According to some embodiments of the present application, the suction part includes a suction pipe and a suction nozzle, and a receiving groove is provided on the side of the suction nozzle away from the suction pipe and is recessed toward the suction pipe. An abutment portion is provided protruding from the bottom wall of the receiving groove, and the abutment portion has a suction hole connected to the suction pipe; the extension dimension of the receiving groove in the first direction is greater than the extension dimension of the receiving groove in the second direction, and the first direction, the second direction, and the thickness direction are arranged to intersect each other. This allows the receiving groove to have a larger installation error accommodation space, and even if the abutment portion is partially offset from the preset air extraction position, the position can still be covered.

[0016] According to some embodiments of the present application, a surface of the abutment portion facing away from the suction pipe is provided with a plurality of guide grooves extending in its radial direction, and the guide grooves are arranged at intervals in the circumferential direction of the abutment portion. The guide grooves enable the abutment portion and the air extraction valve portion to be connected through the guide grooves when they are staggered from each other, thereby achieving suction.

[0017] According to some embodiments of the present application, the bottom plate assembly includes a detachably connected bottom fixing plate and a side fixing plate, the bottom fixing plate is provided with a groove recessed along the second direction, and the side fixing plate closes the groove to form a limiting hole, so that the structure of the bottom plate assembly is simple and reliable, and the installation of the suction assembly is convenient.

[0018] According to some embodiments of the present application, in the first direction, the height of the storage cavity decreases along the direction from the middle of the storage cavity to both ends, so that the gas in the storage cavity flows evenly and the extraction efficiency is improved.

[0019] According to some embodiments of the present application, the storage assembly further includes a plurality of exhaust pipes and a plurality of liquid discharge pipes, which are respectively connected to two opposite sides of the storage cavity in the thickness direction, so that the gas and liquid are discharged from the upper and lower sides respectively, thereby improving the reliability of the air extraction device.

[0020] In a second aspect, the present application provides a battery formation system, comprising the exhaust device in any embodiment of the first aspect.

[0021] In a third aspect, the present application provides a battery production device, including the battery formation system in any embodiment of the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0023] Figure 1 A schematic diagram of the structure of an air extraction device provided in some embodiments of the present application;

[0024] Figure 2 A schematic diagram of the structure of an air extraction device provided in some other embodiments of the present application;

[0025] Figure 3 An exploded view of a suction portion provided for some other embodiments of the present application;

[0026] Figure 4 A schematic diagram of the structure of a bottom fixing plate provided in some embodiments of the present application;

[0027] Figure 5 for Figure 4 A magnified view of the area P shown;

[0028] Figure 6 A schematic diagram of the structure of a side fixing plate provided in some embodiments of the present application;

[0029] Figure 7 for Figure 6 A magnified view of the area Q is shown;

[0030] Figure 8 A schematic diagram of the structure of a suction nozzle provided in some embodiments of the present application.

[0031] Reference numerals:

[0032] 100-air extraction device;

[0033] 10-support frame; 20-storage assembly; 30-suction assembly;

[0034] 11-main body; 12-bottom plate assembly; 21-storage chamber; 22-exhaust pipe; 23-liquid discharge pipe; 31-connecting pipe; 32-suction part; 33-first positioning plate; 34-second positioning plate; 35-limiting ring; 36-first elastic member; 37-second elastic member;

[0035] 121-limiting hole; 122-third positioning groove; 123-bottom fixing plate; 124-side fixing plate; 321-suction pipe; 322-suction nozzle; 331-first through hole; 332-first positioning groove; 341-second through hole; 342-second positioning groove; 343-positioning part;

[0036] 1211-first limiting hole; 1212-second limiting hole; 3211-protruding portion; 3221-accommodating groove; 3222-abutting portion; 3223-suction hole; 3224-guiding groove;

[0037] X-first direction; Y-second direction; Z-thickness direction. DETAILED DESCRIPTION

[0038] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0040] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0041] Reference to "embodiments" herein 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 herein may be combined with other embodiments.

[0042] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. 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 article generally indicates that the associated objects before and after are in an "or" relationship.

[0043] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0044] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0045] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "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, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0046] In the embodiment of the present application, the battery cell may be a secondary battery cell, which refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0047] The battery cells can be lithium-ion battery cells, sodium-ion battery cells, sodium-lithium-ion battery cells, lithium metal battery cells, sodium metal battery cells, lithium-sulfur battery cells, magnesium-ion battery cells, nickel-hydrogen battery cells, nickel-cadmium battery cells, lead-acid battery cells, etc., which are not limited in the embodiments of the present application.

[0048] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode and a negative electrode. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are inserted and removed back and forth between the positive electrode and the negative electrode.

[0049] As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery.

[0050] In the field of batteries, each battery cell usually has a shell and an electrode assembly and electrolyte disposed in the shell. In the process of processing and manufacturing the battery cell, a battery formation step is usually provided to activate the active material on the electrode assembly so that it can form a dense film layer. During the formation process, a large amount of gas is usually generated in the shell, and the battery cell needs to be exhausted simultaneously to reduce the possibility of adverse effects on the electrochemical performance of the battery cell.

[0051] In the related art, it is usually necessary to exhaust multiple battery cells at the same time through the same exhaust device. However, due to the differences in parameters such as size, arrangement, and number of battery cells, the positions of the exhaust valves that need to be connected thereto will also change accordingly, resulting in the same exhaust device being unable to be suitable for different working conditions. The exhaust device needs to be replaced or manually cut and pulled to change the shape, which in turn leads to a decrease in production efficiency and an increase in production costs.

[0052] In view of this, an embodiment of the present application provides a technical solution, which enables the vacuum device to adapt to different working conditions by enabling the suction component in the vacuum device to move in a preset direction and within a preset range, and the replacement method is simple, which can effectively improve production efficiency and reduce production costs.

[0053] Next, combine with Figure 1 To Attachment Figure 8 The structure of the air extraction device 100 will be described.

[0054] Please also read Figures 1 to 3 , Figure 1 A schematic diagram of the structure of an air extraction device provided in some embodiments of the present application; Figure 2 A schematic diagram of the structure of an air extraction device provided in some other embodiments of the present application, Figure 3 Exploded diagram of a suction portion provided for some other embodiments of the present application.

[0055] In the first aspect, an embodiment of the present application provides an exhaust device 100, comprising a support frame 10, a storage component 20 and a plurality of suction components 30, the support frame 10 comprising a main body portion 11 and a bottom plate component 12 connected to each other, the bottom plate component 12 being provided with a plurality of limiting holes 121 spaced apart along a first direction X; the storage component 20 being arranged on the support frame 10 and comprising a storage cavity 21; each suction component 30 comprising a connecting pipe 31 and a suction portion 32, the connecting pipe 31 being connected between the suction portion 32 and the storage cavity 21, the plurality of suction components 30 respectively passing through the plurality of limiting holes 121, and at least one suction portion 32 being able to move along the first direction X in the limiting hole 121.

[0056] The exhaust device 100 provided in the embodiment of the present application includes a support frame 10 for providing support and positioning, a storage assembly 20 for storing the extracted gas or liquid, and a suction assembly 30 for connection and exhaust, wherein the support frame 10 includes a main body 11 and a bottom plate assembly 12. Exemplarily, the main body 11 may include a plurality of support frames, and together with the bottom plate assembly 12, form a ring to stabilize the support. The bottom plate assembly 12 extends along a first direction X, and is provided with a plurality of limiting holes 121 at intervals in its own extension direction. The specific positions of these limiting holes 121 can be designed according to the position of the exhaust valve for extracting the formed gas on the battery cell to be exhausted, so that the valve can be arranged corresponding to the suction assembly 30 passing through the limiting hole 121.

[0057] Optionally, the support frame 10 may be rectangular. Optionally, the top of the support frame 10, that is, the side of the main body 11 away from the bottom plate assembly 12, may be provided with a connector for connecting with other components, such as a lifting ear, a T-shaped slider that can slide with a slide rail, etc. Optionally, on the side where the aforementioned connector is located, the main body 11 may also be provided with a limit block at one end in the first direction X, for realizing the positioning of the support frame 10 after hoisting.

[0058] The storage assembly 20 is mounted on the support frame 10. In the embodiment where the support frame 10 is annular, the storage assembly 20 can be arranged inside the annular support structure and located near the top. The storage assembly 20 has a hollow storage cavity 21. In the embodiment with multiple suction assemblies 30, each suction assembly 30 can be connected to the storage cavity 21 at the same time. Optionally, the storage cavity 21 can extend along the first direction X, and its extended area in the first direction X covers the location of each suction assembly 30, so as to facilitate the connection of the suction assembly 30 to the storage cavity and improve the uniformity of suction. Optionally, the storage cavity 21 can be connected to a device providing suction through a pipeline or an opening.

[0059] The suction assembly 30 includes a connecting tube 31 and a suction part 32, wherein the connecting tube 31 is connected between the suction part 32 and the storage chamber 21, wherein the connecting tube 31 may have a certain flexibility, for example, it may be made of elastic and bendable materials such as rubber, so as to facilitate the movement of the suction part 32. The suction part 32 is used to connect with the component to be evacuated, and this part of the structure passes through the limiting hole 121, and at least part of it can move along the first direction X in the corresponding limiting hole 121, that is, at least part of the extending dimension of the limiting hole 121 in the first direction X is greater than the dimension of the suction part 32, so as to provide a moving space. Optionally, the limiting hole 121 may be a rectangular hole.

[0060] By moving the suction part 32 within the range of the limiting hole 121, the specific position corresponding to the suction nozzle in at least part of the suction part 32 and the distance between adjacent suction parts 32 can be flexibly adjusted, thereby enabling the suction device 100 to adapt to battery cells of various sizes and arrangements.

[0061] In some optional embodiments, the suction part 32 includes a suction tube 321 and a suction nozzle 322, and the suction tube 321 is connected between the connecting tube 31 and the suction nozzle 322; the suction assembly 30 also includes a first positioning plate 33 and a second positioning plate 34, and the first positioning plate 33 and the second positioning plate 34 are respectively sleeved on the suction tube 321 and spaced apart from each other in the thickness direction Z of the bottom plate assembly 12, and the first positioning plate 33 and the second positioning plate 34 are respectively abutted against the opposite sides of the bottom plate assembly 12 in the thickness direction Z.

[0062] The suction part 32 is used to connect with the valve or opening to be evacuated, and includes a suction pipe 321 and a suction nozzle 322, wherein the suction pipe 321 may be a hard tubular structure and is connected to the storage chamber 21 through the connecting pipe 31, and the suction nozzle 322 is connected to the other end of the suction pipe 321 away from the connecting pipe 31. Optionally, the suction pipe 321 may be a round tube with a certain length, so that a component for auxiliary positioning can be installed on the suction pipe 321. The diameter of the suction pipe 321 may be the same as or slightly smaller than the diameter of the connecting pipe 31.

[0063] On this basis, the suction assembly 30 also includes a first positioning plate 33 and a second positioning plate 34. Both positioning plates are sleeved on the suction tube 321, and the two positioning plates can be moved relative to the suction tube 321 in its extension direction and within a certain range, or the two positioning plates can be fixed relative to the suction tube 321. The first positioning plate 33 is located on the side of the bottom plate assembly 12 close to the storage cavity 21, and the second positioning plate 34 is located on the side of the bottom plate assembly 12 away from the storage cavity 21. Therefore, the first positioning plate 33 and the second positioning plate 34 can be respectively abutted against the bottom plate assembly 12 from both sides in the thickness direction Z to achieve positioning in this direction. Optionally, the first positioning plate 33 and the second positioning plate 34 can have the same shape and size, for example, a rectangle, to facilitate processing.

[0064] The suction nozzle 322 is used to directly contact the component to be evacuated, and may be provided with a through hole connected to the suction pipe 321. The suction nozzle 322, the suction pipe 321, and the connecting pipe 31 may all be detachably connected.

[0065] By clamping the first / second positioning plates of the bottom plate assembly 12 at both sides respectively, the suction assembly 30 can be prevented from slipping out of the limiting hole 121, thereby further improving the reliability of the air extraction device 100.

[0066] In some optional embodiments, the suction assembly 30 also includes a limiting ring 35 and a first elastic member 36. The limiting ring 35 is connected to the suction tube 321 and is located on the side of the first positioning plate 33 away from the second positioning plate 34. The first elastic member 36 is sleeved on the suction tube 321 and clamped between the limiting ring 35 and the first positioning plate 33.

[0067] The first positioning plate 33 in the suction assembly 30 can be fixed with the aid of the limiting ring 35 and the first elastic member 36, so that the first positioning plate 33 can have a certain movement space in the extension direction of the suction pipe 321. Specifically, the limiting ring 35 is sleeved on the suction pipe 321, and can be an annular structure protruding from the surface of the suction pipe 321. Optionally, the limiting ring 35 can be an annular structure with a uniform thickness at all places, or the limiting ring 35 can be an irregular shape with a partial area protruding along its own radial direction, so as to abut against the first elastic member 36.

[0068] Optionally, the limiting ring 35 is sleeved on one end of the suction pipe 321 close to the connecting pipe 31, and the limiting ring 35 can be reused as a connecting fixing ring of the aforementioned two pipes, used to press the connecting pipe 31 against the outer peripheral surface of the suction pipe 321, thereby achieving a sealed connection between the two.

[0069] The first elastic member 36 is sleeved on the suction tube 321 and can be elastically deformed in the extension direction of the suction tube 321 and switch between a compressed state and an extended state. One end of the first elastic member 36 abuts against the limit ring 35, and the other end abuts against the first positioning plate 33. At this time, the limit ring 35 is installed on the suction tube 321, and the first positioning plate 33 abuts against one side surface of the bottom plate assembly 12. Therefore, the expansion and contraction of the first elastic member 36 can make the suction tube 321 and the suction nozzle 322 reciprocate in the thickness direction Z relative to the bottom plate assembly 12 without leaving the limit hole 121.

[0070] Optionally, the first elastic member 36 should have a suitable elastic modulus so that the suction tube 321 can still stay in the limiting hole 121 in a stretched state without any force and in a limit compression state, so as to reduce the possibility of the suction assembly 30 slipping after the position change, and further improve the reliability of the vacuum device 100.

[0071] The suction assembly 30 having a limiting ring 35 and a first elastic member 36 can conveniently change its position by dragging it downward and moving it laterally, and after changing its position, the suction assembly 30 can automatically reset to the working height in the thickness direction Z through the elastic force of the first elastic member 36, thereby further improving production efficiency.

[0072] In some optional embodiments, the suction assembly 30 further includes a second elastic member 37 , which is sleeved on the suction tube 321 and clamped between the second positioning plate 34 and the suction nozzle 322 .

[0073] Similar to the configuration of the first elastic member 36 , the suction assembly 30 may further include a second elastic member 37 , which is sleeved on the suction tube 321 and can be elastically deformed in the extension direction of the suction tube 321 to achieve relative displacement between the second positioning plate 34 and the suction nozzle 322 .

[0074] Optionally, when using the vacuum device 100 and aligning the suction nozzle 322 with the battery cell, the suction nozzle 322 can be moved by pulling down the second positioning plate 34. At this time, the second elastic member 37 between the second positioning plate 34 and the suction nozzle 322 can provide a buffering effect, thereby reducing the impact of the force during crimping on the battery cell waiting for vacuum extraction, thereby reducing the possibility of damage to the components.

[0075] Optionally, the first elastic member 36 and the second elastic member 37 are both springs sleeved on the suction pipe 321 , which have a simple and reliable structure and low cost.

[0076] In some optional embodiments, the first positioning plate 33 and the second positioning plate 34 are respectively provided with a first through hole 331 and a second through hole 341 penetrating along the thickness direction Z, and the suction pipe 321 passes through the first through hole 331 and the second through hole 341; the hole walls of the first through hole 331 and the second through hole 341 are respectively provided with at least one first positioning groove 332 and at least one second positioning groove 342, the first positioning groove 332 and the second positioning groove 342 both extend along the thickness direction Z and their orthographic projections in the thickness direction Z at least partially overlap, and the suction pipe 321 is provided with a protrusion 3211, and the protrusion 3211 passes through the first positioning groove 332 and the second positioning groove 342.

[0077] The first positioning plate 33 and the second positioning plate 34 can be both sleeved on the suction tube 321 through the through holes provided therein and penetrating along the thickness direction Z, wherein the first positioning plate 33 has a first through hole 331, and the second positioning plate 34 has a second through hole 341, and the side walls of the two through holes are respectively provided with a first positioning groove 332 and a second positioning groove 342, both of which start from the hole wall and are recessed in a direction away from the central axis of the through hole, and can both extend along the thickness direction Z and pass through the entire positioning plate.

[0078] Optionally, the first positioning groove 332 and the second positioning groove 342 may have the same width and depth. And the two may be arranged corresponding to each other in the thickness direction Z, that is, the orthographic projections of the two in this direction should at least partially overlap, and the width of the overlapping area should be greater than the width of the protrusion 3211, so that the protrusion 3211 can pass through the groove. Optionally, the first positioning groove 332 and the second positioning groove 342 may have the same width, and the orthographic projections of the two in the thickness direction Z completely overlap.

[0079] The suction pipe 321 is provided with a protrusion 3211 , which is protruded from the outer peripheral surface of the suction pipe 321 and extends along the thickness direction Z. The protrusion 3211 can pass through the two positioning grooves at the same time.

[0080] The first positioning plate 33 and the second positioning plate 34 respectively clamp the base plate assembly 12 on both sides and can be supported and fixed by the base plate assembly 12. By simultaneously passing the protrusion 3211 through the positioning grooves on the two positioning plates, the suction tube 321 can be positioned circumferentially, reducing the possibility of circumferential rotation of the suction tube 321 during the movement along the thickness direction Z, thereby further improving the positioning accuracy of the suction nozzle 322 and further improving the reliability of the vacuum device 100.

[0081] In some optional embodiments, in the thickness direction Z, the extension dimension of the protrusion 3211 is greater than the extension dimension of the first positioning groove 332 and the extension dimension of the second positioning groove 342 .

[0082] The extension dimension of the protrusion 3211 in the thickness direction Z can be designed according to the thickness of the first and second positioning plates and the telescopic dimensions of the first and second elastic members. Optionally, the length of the protrusion 3211 can be made greater than the length of the first positioning groove 332 and the second positioning groove 342, so that the protrusion 3211 can remain in a sliding state in the positioning groove, further reducing the possibility of the protrusion 3211 slipping out of the positioning groove during the pull-down displacement process.

[0083] Please also read Figures 4 to 7 , Figure 4 A schematic diagram of the structure of the bottom fixing plate provided in some embodiments of the present application, Figure 5 for Figure 4 The enlarged view of the area P is shown. Figure 6 A schematic diagram of the structure of the side fixing plate provided in some embodiments of the present application, Figure 7 for Figure 6 Magnified view of area Q shown.

[0084] In some optional embodiments, the base plate assembly 12 is provided with a plurality of third positioning grooves 122 arranged at intervals along the first direction X, and the second positioning plate 34 is provided with a positioning portion 343 protruding in a direction close to the base plate assembly 12 , and the positioning portion 343 extends into the third positioning groove 122 .

[0085] The base plate assembly 12 extends along the first direction X. In this direction, a plurality of third positioning grooves 122 may be provided on the surface of one side of the base plate assembly 12 close to the second positioning plate 34. Correspondingly, each second positioning plate 34 may be provided with at least one positioning portion 343 on the side close to the base plate assembly 12. The shape and size of the positioning portion 343 may correspond to the third positioning groove 122 so that it can extend into the third positioning groove 122, and the second positioning plate 34 can be positioned by the clamping connection between the two.

[0086] The number and setting position of the third positioning grooves 122 can be set according to the arrangement and position of the battery cells to be evacuated. For example, the evacuation device 100 can evacuate 10 or 12 battery cells at the same time, and the third positioning grooves 122 can be respectively set at the positions corresponding to the two working conditions. When changing positions, the second positioning plate 34 can be held and pulled down to drive the suction assembly 30 to move downward as a whole. At this time, the positioning portion 343 and the third positioning groove 122 originally inserted are separated from each other, and then the second positioning plate 34 is moved to the next preset position along the first direction X. The second positioning plate 34 and the suction portion 32 can be raised by the first elastic member 36 until the positioning portion 343 is stuck in another third positioning groove 122, and the replacement of the suction assembly 30 can be completed. Repeating the above operation for each suction assembly 30 that needs to be replaced can quickly and accurately achieve replacement, thereby improving production efficiency.

[0087] By providing the third positioning groove 122 and the positioning portion 343 , the suction assembly 30 can be quickly and accurately moved to the preset position, and the possibility of the suction assembly 30 slipping out of the preset position during operation can be reduced.

[0088] In some optional embodiments, in the thickness direction Z, the orthographic projections of at least a portion of the limiting holes 121 cover the orthographic projections of the plurality of third positioning grooves 122 .

[0089] The suction assembly 30 passes through the limiting hole 121 and can move along the first direction X in the limiting hole 121. Therefore, at least part of the limiting holes 121 can be set corresponding to multiple third positioning grooves 122, so that the suction assembly 30 in the limiting hole 121 can switch with each other in the positions corresponding to these third positioning grooves 122.

[0090] Optionally, the number and positions of the limiting holes 121 can be set corresponding to the number and positions of the connecting tubes 31, and the size of each limiting hole 121 can be designed according to the various positions that the suction component 30 needs to switch. The limiting holes 121 corresponding to some of the suction components 30 that need to be replaced can have a larger size and correspondingly set multiple third positioning grooves 122 for switching and positioning of the suction components 30.

[0091] In some optional embodiments, the plurality of limiting holes 121 include a first limiting hole 1211 and a second limiting hole 1212, and in the first direction X, the extension dimension of the first limiting hole 1211 is greater than the extension dimension of the second limiting hole 1212; in the thickness direction Z, the orthographic projection of the first limiting hole 1211 covers the orthographic projections of the two third positioning grooves 122, and the orthographic projections of the second limiting hole 1212 are arranged one-to-one with the third positioning grooves 122.

[0092] Based on the correspondence between the aforementioned limiting hole 121 and the third positioning groove 122, the limiting hole 121 can be divided into a first limiting hole 1211 and a second limiting hole 1212, wherein the first limiting hole 1211 has a larger extension dimension in the first direction X and can be set corresponding to two third positioning grooves 122, and the shorter second limiting hole 1212 can be set corresponding to a single third positioning groove 122, that is, the suction assembly 30 in the first limiting hole 1211 can be replaced.

[0093] The number and positions of the first limiting holes 1211 and the second limiting holes 1212 can be set according to the number and arrangement of the battery cells to be evacuated, and correspondingly distinguish between the interchangeable and non-interchangeable suction components 30, so as to reduce the possibility of the suction component 30 slipping and enable it to achieve flexible switching of positions.

[0094] See also Figure 8 , Figure 8 A schematic diagram of the structure of the suction nozzle provided for some embodiments of the present application. In some optional embodiments, the suction portion 32 includes a suction pipe 321 and a suction nozzle 322, and a receiving groove 3221 is provided on the side of the suction nozzle 322 away from the suction pipe 321, and is recessed in the direction close to the suction pipe 321. An abutment portion 3222 is protruded from the bottom wall of the receiving groove 3221, and the abutment portion 3222 has a suction hole 3223 connected to the suction pipe 321; the extension dimension of the receiving groove 3221 in the first direction X is greater than the extension dimension of the receiving groove 3221 in the second direction Y, and the first direction X, the second direction Y and the thickness direction Z are arranged to intersect each other.

[0095] The suction part 32 may include a suction pipe 321 and a suction nozzle 322. The suction pipe 321 is connected between the connecting pipe 31 and the suction nozzle 322, wherein the suction nozzle 322 may be used to abut against the component to be evacuated. On this basis, a receiving groove 3221 is provided on the side of the suction nozzle 322 away from the suction pipe 321, so as to be interlocked with the surface of the component to be evacuated. The notch of the receiving groove 3221 is provided on the side of the suction nozzle 322 away from the suction pipe 321. The shape of the receiving groove 3221 may be waist-shaped, rectangular or elliptical.

[0096] The bottom wall of the receiving groove 3221 is provided with an abutment portion 3222, which can be used to press down the valve to open it when sucking the battery cell or other components that are sucked through the valve. The abutment portion 3222 can be cylindrical or prismatic, and a suction hole 3223 connected to the suction pipe 321 is provided at the position of the central axis to achieve the connection between the suction nozzle 322 and the storage chamber 21 as a whole.

[0097] Optionally, the receiving groove 3221 may have different extension dimensions in the first direction X and the second direction Y, wherein the extension dimension in the first direction X may be larger. The suction components 30 in the suction device 100 are arranged at intervals along the first direction X corresponding to the limiting holes 121. During operation, the components to be sucked may also be arranged in sequence along the first direction X. The receiving groove 3221 having a larger extension dimension in the first direction X may increase the range in which the components to be sucked may be arranged, and improve the compatibility with the alignment error when the suction nozzle 322 abuts against the components to be sucked. Even when the abutting portion 3222 is partially offset from the preset suction position, the receiving groove 3221 may still cover the position, thereby further improving the reliability of the suction device 100.

[0098] In some optional embodiments, a surface of the abutment portion 3222 facing away from the suction pipe 321 is provided with a plurality of guide grooves 3224 extending along its radial direction, and the guide grooves 3224 are arranged at intervals in the circumferential direction of the abutment portion 3222 .

[0099] The abutment portion 3222 is protruded from the bottom wall of the receiving groove 3221 and can be used to press open the exhaust valve on the battery cell. The abutment portion 3222 can be provided with guide grooves 3224, which extend along the radial direction of the abutment portion 3222 and are respectively connected to the suction holes 3223. When the abutment portion 3222 is pressed against the aforementioned valve, the orthographic projection of the valve in the thickness direction Z can be made to overlap with the orthographic projection of at least one of the suction hole 3223 and the guide groove 3224, so that the valve and the storage chamber 21 can be connected.

[0100] Optionally, the number of guide grooves 3224 may be greater than or equal to 6, and may be arranged at equal intervals in the circumferential direction of the abutment portion 3222 to increase the possibility of corresponding communication with the valve. Meanwhile, the width of the guide groove 3224 may be 0.5 mm-2 mm, and may be selected from 0.5 mm, 1 mm, 1.5 mm, and 2 mm; the depth of the guide groove 3224 may be 0.3 mm-1 mm, and may be selected from 0.3 mm, 0.5 mm, 0.7 mm, and 1 mm.

[0101] By providing the guide groove 3224 , the compatibility of the positioning error between the suction nozzle 322 and the component to be vacuumed can be further improved, thereby further improving the reliability of the vacuum device 100 .

[0102] In some optional embodiments, the bottom plate assembly 12 includes a detachably connected bottom fixing plate 123 and a side fixing plate 124 , the bottom fixing plate 123 is provided with a groove recessed along the second direction Y, and the side fixing plate 124 is closed to form a limiting hole 121 .

[0103] The bottom plate assembly 12 can be composed of a bottom fixing plate 123 and a side fixing plate 124 which are detachably connected, wherein the bottom fixing plate 123 has a plurality of grooves, which are set starting from one side edge of the bottom fixing plate 123 in the second direction Y and are recessed in the direction of the other side edge opposite to the direction. At the same time, the side fixing plate 124 is set on the side where the groove opening of the bottom fixing plate 123 is located, and closes the groove so that the groove forms a limiting hole 121.

[0104] Alternatively, the side fixing plate 124 may be a plate-shaped member extending along a plane, in which case the extension dimension of the limiting hole 121 in the second direction Y is the same as the depth of the groove; or, the side fixing plate 124 may be provided with an auxiliary groove corresponding to the groove on the bottom fixing plate 123, and the two are engaged with each other, so that the extension dimension of the limiting hole 121 in the second direction Y is the sum of the depths of the aforementioned groove and the auxiliary groove. Optionally, in an embodiment in which the third positioning groove 122 is provided, the bottom fixing plate 123 and the side fixing plate 124 may be provided with the third positioning groove 122 corresponding to each other at the same time.

[0105] The bottom fixing plate 123 and the side fixing plate 124 are detachably connected to each other, so as to facilitate the installation of the suction assembly 30 into the limiting hole 121. Optionally, the suction part 32 can be firstly placed in the groove of the bottom fixing plate 123, and then the side fixing plate 124 can be connected to the bottom fixing plate 123, so as to conveniently and reliably fix the suction assembly 30 in the limiting hole 121.

[0106] In some optional embodiments, in the first direction, along the direction from the middle of the storage cavity 21 to both ends, the height of the storage cavity 21 tends to decrease.

[0107] The storage chamber 21 may be an integrated, large-volume hollow chamber, and is simultaneously connected to a plurality of suction assemblies 30. The extension dimension of the storage chamber 21 in the thickness direction Z, that is, the height of the storage chamber 21 may be in a structural form of being smaller at both ends and larger in the middle. Optionally, the surface of one side of the storage chamber 21 connected to the connecting pipe 31 may be a plane, and the other side surface opposite in the thickness direction Z may be an arc surface. Optionally, the storage chamber 21 may be symmetrically arranged in the first direction X.

[0108] This arrangement can increase the angle between the side walls and the top wall on both sides of the storage chamber 21 that are opposite to each other in the first direction X, thereby reducing the possibility of gas stagnation and poor flow at smaller angles, making the overall gas flow in the storage chamber 21 uniform, and improving the exhaust efficiency and the uniformity of exhaust for each suction component 30.

[0109] In some optional embodiments, the storage assembly 20 further includes a plurality of exhaust pipes 22 and a plurality of drain pipes 23 , and the exhaust pipes 22 and the drain pipes 23 are respectively connected to two opposite sides of the storage cavity 21 in the thickness direction Z.

[0110] The storage chamber 21 is connected to the suction assembly 30. During operation, due to factors such as gas liquefaction caused by temperature changes or electrolyte splashing caused by external impacts, gas and liquid can be stored in the storage chamber 21 at the same time, and both can be extracted through pipes located at the top and bottom of the storage chamber 21, respectively. Specifically, a plurality of exhaust pipes 22 can be connected to the top of the storage chamber 21, and these exhaust pipes 22 can be connected to the device providing suction, respectively, or these exhaust pipes 22 can be connected to the device providing suction through a joint. The drain pipe 23 can adopt a similar setting method, which will not be repeated in this application.

[0111] Optionally, two exhaust pipes 22 and two drain pipes 23 may be respectively provided in the storage assembly 20. Both the exhaust pipes 22 and the drain pipes 23 may be connected to the storage chamber 21 by using L-shaped joints, and the joints may be spaced apart from each other in the first direction X to further improve the uniformity of air extraction.

[0112] By providing the exhaust pipe 22 and the liquid discharge pipe 23 and discharging the gas and liquid in the storage chamber 21 from the upper and lower sides respectively, the possibility of pipeline blockage can be reduced and the reliability of the air extraction device 100 can be further improved.

[0113] In a second aspect, the present application provides a battery formation system, comprising the exhaust device 100 in any embodiment of the first aspect.

[0114] In a third aspect, the present application provides a battery production device, including the battery formation system in any embodiment of the second aspect.

[0115] The battery formation system and battery production device provided in the embodiments of the present application have all the beneficial effects of the exhaust device 100 in any of the embodiments of the first aspect mentioned above. For details, please refer to the specific description of the exhaust device 100 in the above embodiments, and this embodiment will not be repeated here.

[0116] The embodiment of the present application provides an air extraction device 100, which includes a support frame 10, a storage component 20 and a plurality of suction components 30. The support frame 10 includes a main body 11 and a bottom plate component 12 connected to each other. The bottom plate component 12 is provided with a plurality of limiting holes 121 arranged at intervals along a first direction X; the storage component 20 is arranged on the support frame 10 and includes a storage cavity 21; each suction component 30 includes a connecting pipe 31, a suction part 32, a first positioning plate 33 and a second positioning plate 34, and the suction part 32 includes a suction pipe 321 and a suction nozzle 322, the suction tube 321 is connected between the connecting tube 31 and the suction nozzle 322, the first positioning plate 33 and the second positioning plate 34 are respectively sleeved on the suction tube 321 and spaced apart from each other in the thickness direction Z, the first positioning plate 33 and the second positioning plate 34 are respectively abutted against the bottom plate assembly 12 on opposite sides in the thickness direction Z; the connecting tube 31 is connected between the suction part 32 and the storage chamber 21, and the plurality of suction assemblies 30 respectively pass through the plurality of limiting holes 121, and at least one suction part 32 can move along the first direction X in the limiting hole 121.

[0117] The suction assembly 30 further includes a stop ring 35, a first elastic member 36 and a second elastic member 37. The stop ring 35 is connected to the suction pipe 321 and is located on the side of the first positioning plate 33 away from the second positioning plate 34. The first elastic member 36 is sleeved on the suction pipe 321 and clamped between the stop ring 35 and the first positioning plate 33. The second elastic member 37 is sleeved on the suction pipe 321 and clamped between the second positioning plate 34 and the suction nozzle 322. The bottom plate assembly 12 is provided with a plurality of third positioning grooves 122 arranged at intervals along the first direction X. The second positioning plate 34 is provided with a positioning portion 343 protruding in a direction close to the bottom plate assembly 12, and the positioning portion 343 extends into the third positioning groove 122.

[0118] 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 vacuum device, characterized in that: include: The support frame comprises a main body and a bottom plate assembly connected to each other, wherein the bottom plate assembly is provided with a plurality of limiting holes spaced apart along a first direction; A storage assembly, disposed on the support frame and comprising a storage cavity; Multiple suction components, each suction component includes a connecting pipe and a suction part, the connecting pipe is connected between the suction part and the storage chamber, the multiple suction components pass through the multiple limiting holes respectively, and at least one of the suction parts can move along the first direction in the limiting hole.

2. The air extraction device according to claim 1, characterized in that: The suction part includes a suction pipe and a suction nozzle, and the suction pipe is connected between the connecting pipe and the suction nozzle; The suction assembly also includes a first positioning plate and a second positioning plate, which are respectively sleeved on the suction tube and spaced apart from each other in the thickness direction of the base plate assembly, and the first positioning plate and the second positioning plate are respectively abutted against two opposite sides of the base plate assembly in the thickness direction.

3. The air extraction device according to claim 2, characterized in that: The suction assembly also includes a limiting ring and a first elastic member. The limiting ring is connected to the suction tube and is located on the side of the first positioning plate away from the second positioning plate. The first elastic member is sleeved on the suction tube and clamped between the limiting ring and the first positioning plate.

4. The air extraction device according to claim 3, characterized in that: The suction assembly further includes a second elastic member, which is sleeved on the suction tube and clamped between the second positioning plate and the suction nozzle.

5. The air extraction device according to claim 2, characterized in that: The first positioning plate and the second positioning plate are respectively provided with a first through hole and a second through hole penetrating along the thickness direction, and the suction pipe passes through the first through hole and the second through hole; The hole walls of the first through hole and the second through hole are respectively provided with at least one first positioning groove and at least one second positioning groove, the first positioning groove and the second positioning groove both extend along the thickness direction and their orthographic projections in the thickness direction at least partially overlap, and the suction tube is provided with a protrusion, which passes through the first positioning groove and the second positioning groove.

6. The air extraction device according to claim 5, characterized in that: In the thickness direction, an extension dimension of the protrusion is larger than an extension dimension of the first positioning groove and an extension dimension of the second positioning groove.

7. The air extraction device according to claim 2, characterized in that: The base plate assembly is provided with a plurality of third positioning grooves spaced apart along the first direction, and the second positioning plate is provided with a positioning portion protruding in a direction close to the base plate assembly, and the positioning portion extends into the third positioning groove.

8. The air extraction device according to claim 7, characterized in that: In the thickness direction, at least part of the orthographic projections of the limiting holes cover the orthographic projections of the plurality of third positioning grooves.

9. The air extraction device according to claim 7, characterized in that: The plurality of limiting holes include a first limiting hole and a second limiting hole, and in the first direction, an extension dimension of the first limiting hole is greater than an extension dimension of the second limiting hole; In the thickness direction, the orthographic projection of the first limiting hole covers the orthographic projections of the two third positioning grooves, and the orthographic projections of the second limiting hole are arranged in a one-to-one correspondence with the third positioning grooves.

10. The air extraction device according to claim 1, characterized in that: The suction part includes a suction pipe and a suction nozzle, a receiving groove is provided on a side of the suction nozzle away from the suction pipe and is recessed toward the suction pipe, an abutment portion is protruded from the bottom wall of the receiving groove, and the abutment portion has a suction hole communicated with the suction pipe; An extension dimension of the accommodating groove in the first direction is greater than an extension dimension of the accommodating groove in the second direction, and the first direction, the second direction and the thickness direction are arranged to intersect each other.

11. The air extraction device according to claim 10, characterized in that: A surface of the abutting portion on one side facing away from the suction pipe is provided with a plurality of guide grooves extending in its radial direction, and the guide grooves are arranged at intervals in the circumferential direction of the abutting portion.

12. The air extraction device according to claim 1, characterized in that: The bottom plate assembly includes a detachably connected bottom fixing plate and a side fixing plate. The bottom fixing plate is provided with a groove recessed along the second direction, and the side fixing plate closes the groove to form the limiting hole.

13. The air extraction device according to claim 1, characterized in that: In the first direction, along the direction from the middle of the storage cavity to both ends, the height of the storage cavity tends to decrease.

14. The air extraction device according to claim 1, characterized in that: The storage assembly further includes a plurality of exhaust pipes and a plurality of drain pipes, wherein the exhaust pipes and the drain pipes are respectively connected to two opposite sides of the storage cavity in the thickness direction.

15. A battery formation system, characterized in that: Comprising the air extraction device as described in any one of claims 1-14.

16. A battery production device, characterized in that: Comprising the battery formation system as claimed in claim 15.

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