CN220416554U - Connecting device and battery production system - Google Patents

Abstract

The application relates to the technical field of battery related equipment and discloses a connecting device and a battery production system, wherein the connecting device comprises a first material pipe, a second material pipe and a sealing piece, and the first material pipe comprises a first connecting part and a first main body part which are mutually connected along the axial direction of the first material pipe; the second material pipe comprises a second main body part and a second connecting part which are mutually connected along the axial direction of the second material pipe, the second connecting part is inserted into the first connecting part, the outer peripheral surface of the second connecting part and the inner peripheral surface of the first connecting part are arranged at intervals, an annular gap is formed, and the second main body part and the first main body part are mutually arranged in a deviating mode; the sealing element is connected with the first material pipe and the second material pipe respectively and seals the annular gap, and the first material pipe and the second material pipe form flexible connection through the sealing element. The connecting device can be used for being connected between the metering device and downstream equipment, so that the influence of the downstream equipment on the metering device is reduced, and the weighing accuracy of the metering device is improved.

Description

Connecting device and battery production system

Technical Field

The application relates to the technical field of battery related equipment, in particular to a connecting device and a battery production system.

Background

This section provides only background information related to the present application and is not necessarily prior art.

In the battery production process, various materials such as slurry, powder and the like can be conveyed among a plurality of production processes through a conveying pipeline, and at least one part of the materials are required to be weighed and then conveyed to downstream equipment. The accuracy of material weighing has a great influence on the quality of prepared battery related components and the production cost of the battery.

Disclosure of Invention

In view of the above, the application provides a connecting device and a battery production system, so as to reduce the influence of the connecting device on the accuracy of material weighing and improve the accuracy of material weighing.

A first aspect of the present application proposes a connecting device comprising a first pipe, a second pipe and a sealing member, the first pipe comprising a first connecting portion and a first body portion connected to each other in an axial direction of the first pipe; the second material pipe comprises a second main body part and a second connecting part which are mutually connected along the axial direction of the second material pipe, the second connecting part is inserted into the first connecting part, the outer peripheral surface of the second connecting part and the inner peripheral surface of the first connecting part are arranged at intervals, and an annular gap is formed, so that the second material pipe and the first material pipe are arranged at intervals, and the second main body part and the first main body part are arranged in a deviating way; the sealing element is connected with the first material pipe and the second material pipe respectively and seals the annular gap, and the first material pipe is flexibly connected with the second material pipe through the sealing element.

In the technical scheme of this application embodiment, connecting device can be connected between metering device and downstream equipment, and wherein, the second main part of second material pipe can be connected with metering device, and the first main part of first material pipe can communicate with downstream equipment. Through inserting the second connecting portion of second material pipe in the first connecting portion of locating first material pipe, and form annular clearance between the outer peripheral face of second connecting portion and the inner peripheral face of first connecting portion, make first material pipe and second material pipe interval set up, form flexonics between first material pipe and the second material pipe simultaneously, annular clearance between first material pipe and the second material pipe is sealed like this after, can maintain flexible flexonics between first material pipe and the second material pipe, first material pipe can not exert effort to the second material pipe, thereby make the metering device with first material pipe connection be difficult for the influence of low reaches equipment, weighing accuracy has been improved. Meanwhile, the second connecting part is inserted in the first connecting part, and materials can directly enter the first material pipe from the outlet of the second material pipe in the process of flowing into the first material pipe from the second material pipe, so that the materials can not pass through the sealing element, the conveying of the materials between the first material pipe and the second material pipe is smooth, the materials are not easy to accumulate at the joint of the sealing element and the first material pipe or the joint of the sealing element and the second material pipe, the hard connection between the sealing element and the first material pipe or the second material pipe caused by material deposition is reduced, and the possibility of failure of flexible connection between the first material pipe and the second material pipe is further improved, and the weighing accuracy of the metering device is improved. When the connecting device of the embodiment of the application is applied to a battery production system, the weighing accuracy of the metering device to materials is improved, so that the production quality of relevant components of the battery is improved, the quality of the battery is improved, the possibility that the materials are used too much can be reduced, and the production cost of the battery is further reduced.

In some embodiments of the present application, the seal comprises a flexible sleeve disposed between the first and second tubes, the flexible sleeve having oppositely disposed first and second ends, the first end being in sealing connection with the first tube, the second end being in sealing connection with the second tube, the flexible sleeve being loosely disposed between the first and second ends. The flexible sleeve is convenient to assemble with the first material pipe and the second material pipe, and the assembling efficiency of the connecting device can be improved. The flexible sleeve is loosely arranged, so that flexible connection between the first material pipe and the second material pipe is reliable, and meanwhile, the relative position between the first material pipe and the second material pipe can have a certain degree of freedom, and therefore, even if downstream equipment is a vibrating screen and the like, in the vibrating process of the vibrating screen, the flexible connection formed by the flexible sleeve is not easy to fail.

In some embodiments of the present application, the first end portion is sleeved on the outer circumferential surface of the first material pipe; and/or the second end part is sleeved on the outer circumferential surface of the second material pipe. The first end part of the flexible sleeve is sleeved on the outer circumferential surface of the first material pipe, and the flexible sleeve is connected with and fixed to the first material pipe conveniently. The second end part of the flexible sleeve is sleeved on the outer circumferential surface of the second material pipe, so that the flexible sleeve is connected with the second material pipe and is convenient to fix.

In some embodiments of the present application, along the axial direction of the first material pipe, the second body portion is located outside the first material pipe, the first end portion is sleeved on the first connection portion and is in sealing connection with the first connection portion, and the second end portion is sleeved on the second body portion and is in sealing connection with the second body portion. The first end part of the flexible sleeve is sleeved on the first connecting part, and the flexible sleeve is sleeved from the end part of the first connecting part, so that the length of the flexible sleeve sleeved on the first material pipe is not required to be too long, and the operation is also convenient.

In some embodiments of the present application, the connecting device further includes a first fixing member sleeved on the first end portion and fixing the first end portion to the first connecting portion. The flexible sleeve is fixed on the first material pipe through the first fixing piece sleeved at the first end, so that the operation is convenient, and the fixing stability is good.

In some embodiments of the present application, the first fixing member includes a first clip, and the first clip is sleeved on the first end. The clamp (first clamp) is used for fixing the flexible sleeve, the operation is convenient, the assembly efficiency of the flexible sleeve and the first material pipe is improved, the fastening force of the clamp is good, and the fixing stability of the flexible sleeve and the first material pipe can be improved.

In some embodiments of the present application, the connecting device further includes a second fixing member sleeved on the second end portion and fixing the second end portion to the second body portion. The flexible sleeve is fixed on the second material pipe through the second fixing piece sleeved on the second end, so that the operation is convenient, and the fixing stability is good.

In some embodiments of the present application, the second securing member includes a second clip, and the second clip is sleeved on the second end. The clamp (second clamp) is used for fixing the flexible sleeve, the operation is convenient, the assembly efficiency of the flexible sleeve and the second material pipe is improved, the fastening force of the clamp is good, and the fixing stability of the flexible sleeve and the second material pipe can be improved.

In some embodiments of the present application, the flexible sleeve includes a middle section bending portion, the middle section bending portion is disposed in the annular gap, and one end of the middle section bending portion is connected with the second end portion, and the other end of the middle section bending portion bypasses the first connecting portion and deviates from one end of the first main body portion to be connected with the first end portion. The middle section bending part is located in the annular gap, can play the backstop effect to the material that gets into the annular gap, reduces the possibility that the material got into junction between first tip and the first connecting portion and junction between second tip and the second main part along the annular gap to improve the flexible coupling's of flexible cover formation reliability.

In some embodiments of the present application, the flow cross-section of the flexible sleeve at the first end is greater than the flow cross-section of the flexible sleeve at the second end, such that the flexible sleeve is better matingly coupled with the first and second tubes.

In some embodiments of the present application, the flow cross-section of the flexible sleeve tapers in a direction from the first end to the second end.

In some embodiments of the present application, the first body portion is of unitary construction with the first connecting portion; and/or the second main body part and the second connecting part are of an integral structure. The first material pipe and the second material pipe are convenient to process, and the problem of loose sealing is difficult to occur.

In some embodiments of the present application, the first and/or second feed tube is a rigid tube.

In some embodiments of the present application, a distance between an end of the first connecting portion facing away from the second body portion and an end of the second connecting portion facing away from the first body portion along an axial direction of the first tube is in a range of 3 cm to 8 cm. The limitation of the size can meet the requirement of reducing the failure of flexible connection, and the assembly difficulty and the consumable cost cannot be excessively improved.

In some embodiments of the present application, a positioning member is disposed at an end of the second body portion near the second connecting portion or on the second connecting portion. The locating piece is used for locating whether the grafting between the first connecting portion and the second connecting portion is in place, has improved the convenience of operating personnel equipment first connecting portion and second connecting portion, has improved packaging efficiency.

In some embodiments of the present application, an end of the first body portion remote from the first connection portion is provided with a first connection member for connection with a downstream device, and an end of the second body portion remote from the second connection portion is provided with a second connection member for connection with an upstream device. The first connecting piece can be fixedly connected to the first main body portion, and the first connecting piece can be convenient for the first material pipe to be connected with downstream equipment. The second connecting piece can be fixedly connected to the second main body portion, and the second connecting piece can be convenient for connection of the second material pipe and upstream equipment.

In some embodiments of the present application, the first connector includes a first flange connected to the first body portion; and/or the second connector includes a second flange connected to the second body portion.

A second aspect of the present application proposes a battery production system comprising an upstream device having a discharge port, a downstream device having a feed port, and a connecting device as set forth in the present application or any embodiment of the present application; the second material pipe is communicated with a discharge port of upstream equipment, and the first material pipe is communicated with a feed port of downstream equipment.

In some embodiments of the present application, the upstream device comprises a metering device, a discharge port of the metering device forming a discharge port of the upstream device.

The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 schematically illustrates a simplified diagram of a battery production system provided in some embodiments of the present application;

FIG. 2 schematically illustrates a partial schematic view of a connection device of some embodiments of the present application;

FIG. 3 schematically illustrates a partial schematic view of a connection device of some embodiments of the present application;

FIG. 4 schematically illustrates an assembled schematic view of a first tube and a second tube according to some embodiments of the present application;

FIG. 5 schematically illustrates an assembled schematic view of a first tube, a second tube, a seal according to some embodiments of the present application;

Fig. 6 schematically illustrates an enlarged view of the portion a of fig. 5;

fig. 7 schematically illustrates a structural schematic of a connection device according to some embodiments of the present application.

Reference numerals in the specific embodiments are as follows:

100. a connecting device; 110. a first material pipe; 111. a first body portion; 112. a first connection portion; 120. a second material pipe; 121. a second body portion; 122. a second connecting portion; 130. a seal; 131. a first end; 132. a second end; 133. a middle section bending part; 134. a flexible sleeve; 140. an annular gap; 150. a first fixing member; 151. a first clip; 160. a second fixing member; 161. a second clip; 170. A first connector; 171. a first flange; 180. a second connector; 181. a second flange; 190. a positioning piece;

200. an upstream device;

300. downstream equipment.

Detailed Description

Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, which means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the embodiments of the present application and for simplifying the description, rather than indicating or implying that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

The powder is one of the materials used for producing the battery. In the battery production process, there are various production processes related to the powder, for example, a process of preparing the powder, a process of mixing the powder into a slurry, and the like. In the process related to the powder, the powder can be conveyed through a pipeline to realize circulation of the powder. The powder conveying system can be provided with a metering device so as to conveniently meter the weight of the powder in the production process. In some techniques, the metering device may be disposed above the downstream device, and after passing through the metering device, the powder may flow into the downstream device along a pipe below the metering device under the action of gravity, where the metering device may also learn, in the process, the weight of the powder flowing into the downstream device through the metering device, so as to implement metering of the weight of the powder.

The accuracy of metering device to the powder measurement, the quality influence to the relevant component of battery of preparation is great, and when the material quantity exceeds standard, also can cause great influence to the manufacturing cost of battery. The metering accuracy of the metering device is always a concern in the battery production process.

It has been found that the metering device mounted above needs to be connected to downstream equipment below by a pipe, and in the case where the downstream equipment interferes with the metering device by the pipe, the metering accuracy of the metering device may be lowered. In particular, in some battery production processes, downstream equipment below the metering device is a vibrating screen, which screens powder by vibration, and the accuracy of the upstream metering device is easily affected by the vibrating screen through a pipeline during the vibration process. Based on this, in order to increase the independence of the metering device, the likelihood of downstream equipment interfering with the metering device through the pipeline is reduced, and in some techniques, a flexible connection is used between the metering device and the downstream equipment. The soft connecting piece forms a channel through which powder passes, the powder can flow through the soft connecting piece from the metering device and then enter downstream equipment, meanwhile, due to the soft nature of the soft connecting piece, the soft connecting piece can enable the metering device to be in non-rigid connection with the downstream equipment, so that the downstream equipment cannot or basically cannot apply acting force to the metering device through the soft connecting piece, the interference of the downstream equipment to the metering device is reduced, and the accuracy of the metering device is improved.

However, it has been found that with the extension of the service time, the connection between the flexible connection element and the discharge pipe of the metering device and the connection between the flexible connection element and the feed pipe of the downstream device are prone to powder accumulation, which results in a tight flexible connection element and thus in a failure of the flexible connection element between the metering device and the downstream device, and the risk of interference of the downstream device with the metering device is still relatively high.

Based on this, in order to reduce the interference of downstream equipment to the metering device, the application provides a connecting device, including first material pipe, second material pipe and sealing member, the one end of second material pipe inserts and locates in the first material pipe, and the interval sets up between the outer peripheral surface of second material pipe and the inner peripheral surface of first material pipe to form annular clearance, make second material pipe and first material pipe can in the radial clearance fit of first material pipe; the sealing element is connected between the first material pipe and the second material pipe and seals the annular gap, and the first material pipe and the second material pipe form flexible connection through the sealing element.

Wherein, the one end that the second material pipe kept away from first material pipe can be used for being connected and communicate with metering device, and the one end that the first material pipe kept away from the second material pipe can be used for being connected and communicate with downstream equipment. Because the second material pipe is inserted in the first material pipe, the powder can directly enter the first material pipe from the outlet of the second material pipe in the process of flowing into the first material pipe from the second material pipe, so that the powder can not pass through the sealing element, the conveying of the powder between the first material pipe and the second material pipe is smooth, the powder is not easy to accumulate at the joint of the sealing element and the first material pipe or the joint of the sealing element and the second material pipe, the hard connection between the sealing element and the first material pipe or the second material pipe caused by powder deposition is reduced, the flexible connection failure possibility between the first material pipe and the second material pipe is further reduced, the possibility that downstream equipment interferes with the metering device is reduced, and the weighing accuracy of the metering device is improved.

The connecting device disclosed in the embodiment of the application can be applied to a material conveying system for conveying materials such as powder, gas and liquid, and can be applied to a battery production system (for example, a production system of positive electrode powder of a battery, a production system of negative electrode powder of a battery and a production system of coating powder of a battery) so as to convey relevant powder, gas and liquid for producing the battery.

For convenience of description, the following embodiments will be described by taking an example in which the connecting device according to an embodiment of the present application is applied to a battery production system.

As shown in fig. 1, fig. 1 schematically illustrates a schematic view of a battery production system provided in some embodiments of the present application, the battery production system including an upstream apparatus 200, a connection device 100, and a downstream apparatus 300. The upstream apparatus 200 has a discharge port and the downstream apparatus 300 has a feed port, the connection device 100 is connected between the discharge port of the upstream apparatus 200 and the feed port of the downstream apparatus 300, and the connection device 100 communicates the upstream apparatus 200 and the downstream apparatus 300 such that material can flow from the upstream apparatus 200 to the downstream apparatus 300 via the connection device 100.

The upstream apparatus 200 and the downstream apparatus 300 are two apparatuses through which the material flows in the battery production system, and the upstream apparatus 200 is upstream of the downstream apparatus 300 in the material flow direction, that is, the material flows through the upstream apparatus 200 first and then flows to the downstream apparatus 300 via the upstream apparatus 200. The driving force of the material flowing between the upstream apparatus 200 and the downstream apparatus 300 may be the gravity action of the material or may be the action of the power apparatus to provide the material with the force, for example, during the powder flowing process, the upstream apparatus 200 may be installed above the downstream apparatus 300 so that the powder may flow from the upstream apparatus 200 to the downstream apparatus 300 under the action of the gravity force, or may be the negative pressure action formed by a fan or the like so that the powder flows from the upstream apparatus 200 to the downstream apparatus 300. In some embodiments, the upstream apparatus 200 and the downstream apparatus 300 may be apparatuses for powder delivery or handling in a battery production system, and in particular, the upstream apparatus 200 may be a metering device, the downstream apparatus 300 may be a vibrating screen, and the metering device may be installed above the vibrating screen.

The discharge port of the upstream device 200 may be formed by opening a hole in a device body, or may be formed by connecting a discharge pipe to the device body, where an outlet of the discharge pipe forms the discharge port. The feed inlet of the downstream apparatus 300 may be formed by opening a hole in the main body of the apparatus, or may be formed by connecting a feed pipe to the main body of the apparatus, and forming the feed inlet by the inlet of the feed pipe.

The upstream device 200 may also be provided with a feed inlet for feeding material into the upstream device 200, and the feed inlet of the upstream device 200 may be located above the discharge outlet of the upstream device 200. The downstream device 300 may also be provided with a discharge opening, and the discharge opening of the downstream device 300 may be provided below the feed opening of the downstream device 300.

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, or the like. The battery typically also includes a housing for enclosing one or more battery cells. The case body can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells.

As shown in fig. 2 to 5, fig. 2 schematically illustrates a partial schematic view of a connection device according to some embodiments of the present application, fig. 3 schematically illustrates a partial schematic view of a connection device according to some embodiments of the present application, fig. 4 schematically illustrates an assembly schematic view of a first pipe and a second pipe according to some embodiments of the present application, fig. 5 schematically illustrates an assembly schematic view of a first pipe, a second pipe, and a sealing member according to some embodiments of the present application, and an embodiment of the present application provides a connection device 100 including a first pipe 110, a second pipe 120, and a sealing member 130. The first material pipe 110 includes a first connection part 112 and a first body part 111 connected to each other in an axial direction of the first material pipe 110, the second material pipe 120 includes a second body part 121 and a second connection part 122 connected to each other in an axial direction of the second material pipe 120, the second connection part 122 is inserted into the first connection part 112, and an annular gap 140 is formed between an outer circumferential surface of the second connection part 122 and an inner circumferential surface of the first connection part 112 so that the second material pipe 120 and the first material pipe 110 are disposed at an interval therebetween, and the second body part 121 and the first body part 111 are disposed apart from each other. The sealing member 130 is connected to the first and second material pipes 110 and 120, respectively, and seals the annular gap 140, and the first material pipe 110 is flexibly connected to the second material pipe 120 through the sealing member 130.

The first and second material pipes 110 and 120 are each pipe structures that can form a material conveying passage. The cross-sections of the first and second tubes 110, 120 may be circular, or may be other shapes, such as oval, etc. As shown in fig. 2, the first pipe 110 may be a straight pipe, and the second pipe 120 may be a straight pipe. In some embodiments, as shown in fig. 3, the first tube 110 or the second tube 120 may also be provided as an elbow. The first pipe 110 or the second pipe 120 in the form of a bent pipe may be conveniently connected between the two devices where the discharge port of the upstream device 200 and the feed port of the downstream device 300 are arranged in a staggered manner by the connecting device 100. When the first pipe 110 is an elbow, the axis of the first main body 111 and the axis of the first connecting portion 112 may be offset to form a curved first pipe 110; when the second pipe 120 is an elbow pipe, the axis of the second body 121 and the axis of the second connecting portion 122 may be offset, so as to form a curved second pipe 120. In any form of the first pipe 110 and the second pipe 120, in order to facilitate the plugging or sleeving connection between the first connecting portion 112 and the second connecting portion 122, the axes of the first connecting portion 112 and the second connecting portion 122 may be substantially coincident.

The first body 111 and the first connecting portion 112 may be integrally formed, or may be integrally connected by welding, fusion, or the like. The first main body 111 and the first connecting portion 112 are both a part of the first material pipe 110, and the first main body 111 and the first connecting portion 112 are both tubular structures that can form a material conveying passage, and the material conveying passage of the first main body 111 communicates with the material conveying passage of the first connecting portion 112. In this embodiment, the first connecting portion 112 generally refers to a portion of the first tube 110 sleeved outside the second tube 120, and the first main portion 111 may be a portion of the first tube 110 located on one side of the second tube 120.

The second body portion 121 and the second connecting portion 122 may be integrally formed, or may be integrally connected by welding, soldering, or the like, where the second body portion 121 and the second connecting portion 122 are both part of the second material pipe 120, and the second body portion 121 and the second connecting portion 122 are both tubular structures capable of forming a material conveying channel, and the material conveying channel of the second body portion 121 is communicated with the material conveying channel of the second connecting portion 122. In the present embodiment, the second connection portion 122 generally refers to a portion of the second material tube 120 inserted into the first material tube 110, and the second body portion 121 may be a portion of the second material tube 120 exposed outside the first material tube 110.

The axial direction of the first pipe 110 may be understood with reference to the flow direction of the material in the first pipe 110, and in particular with reference to the X direction in the drawing, and the axial direction of the second pipe 120 may be understood with reference to the flow direction of the material in the second pipe 120, and in particular with reference to the X direction in the drawing. The second connection portion 122 may be inserted into the first connection portion 112 in an axial direction from an end of the first connection portion 112. In some embodiments, at least the axial direction of the first connection portion 112 and the axial direction of the second connection portion 122 may be set to be the same so that the second connection portion 122 is inserted into the first connection portion 112.

The inner peripheral surface of the first connecting portion 112 is a side of the first connecting portion 112 facing the second connecting portion 122, and is also a side surface of the first connecting portion 112 forming a material conveying path. The outer circumferential surface of the second connection portion 122 is a side of the second connection portion 122 facing the first connection portion 112, and is a side exposed to the outside when the second connection portion 122 is not inserted into the first connection portion 112. The interval between the outer circumferential surface of the second connecting portion 122 and the inner circumferential surface of the first connecting portion 112 and forming the annular gap 140 may be understood as that the second connecting portion 122 is embedded in the first connecting portion 112, and the second connecting portion 122 is not contacted with the first connecting portion 112, so that the first connecting portion 112 and the second connecting portion 122 are arranged at intervals, that is, after the first material pipe 110 and the second material pipe 120 are inserted, they are arranged at intervals in the radial direction, that is, they are in a gap-fit state, and the first material pipe 110 and the second material pipe 120 are not contacted. The annular gap 140 is not limited to a circular gap, and specifically, the shape of the annular space is related to the shape of the inner peripheral surface of the first connecting portion 112 and the outer peripheral surface of the second connecting portion 122.

The sealing member 130 may be connected to the first pipe 110, specifically, the sealing member 130 may be connected to the first body 111, or the sealing member 130 may be connected to the first connecting portion 112. The sealing member 130 is connected to the second pipe 120, and specifically, the sealing member 130 may be connected to the second body 121, or the sealing member 130 may be connected to the second connecting portion 122. The sealing member 130 is connected to the first pipe 110 and the second pipe 120, respectively, so that the sealing member 130 is fixed by the first pipe 110 and the second pipe 120, and the annular gap 140 can be sealed. The flexible connection of the first tube 110 to the second tube 120 by the seal 130 is understood to be that the seal 130 primarily functions to seal the annular gap 140, and that the seal 130 does not or substantially does not allow the first tube 110 to transfer forces to the second tube 120 when the connection device 100 is in its natural use state, and is understood to be a flexible connection. Specifically, the sealing member 130 may be a flexible material member having elasticity, for example, the sealing member 130 may be a silicone rubber or a rubber member, the sealing member 130 is disposed in the annular gap 140 and is in contact with the first material tube 110 and the second material tube 120, and the sealing member 130 still has a larger compression capability when disposed in the annular gap 140, and the elastic modulus of the sealing member 130 is smaller, so that the sealing member 130 is mounted in the annular gap 140 in a softer state, such that the first material tube 110 is substantially unable to transmit the force through the sealing member 130. For another example, the sealing member 130 may be a flexible sleeve 134, and may take a loose state between the first material pipe 110 and the second material pipe 120, so as to form a flexible connection, where the flexible sleeve 134 is a sleeve that has high flexibility and is deformable under a small force, and may be a rubber, silicone sleeve, cloth sleeve, or the like.

The connection device 100 of the present embodiment may be connected between the metering device and the downstream apparatus 300, wherein the second body portion 121 of the second pipe 120 may be connected with the metering device, and the first body portion 111 of the first pipe 110 may be in communication with the downstream apparatus 300. The second connecting portion 122 of the second material pipe 120 is inserted into the first connecting portion 112 of the first material pipe 110, and an annular gap 140 is formed between the outer peripheral surface of the second connecting portion 122 and the inner peripheral surface of the first connecting portion 112, so that the first material pipe 110 and the second material pipe 120 are separately arranged. Meanwhile, the first material pipe 110 is flexibly connected with the second material pipe 120 through the sealing piece 130, so that the connection between the first material pipe 110 and the second material pipe 120 is flexible, the first material pipe 110 can not apply acting force to the second material pipe 120, and therefore a metering device connected with the first material pipe 110 is not easily affected by downstream equipment 300, and weighing accuracy is improved. Meanwhile, the second connecting portion 122 is inserted into the first connecting portion 112, and in the process that the material flows from the second material pipe 120 to the first material pipe 110, the material can directly enter the first material pipe 110 from the outlet of the second material pipe 120, so that the material can not pass through the sealing member 130, and thus, the material is conveyed smoothly between the first material pipe 110 and the second material pipe 120, and is not easy to accumulate at the connection position between the sealing member 130 and the first material pipe 110 or the connection position between the sealing member 130 and the second material pipe 120, the hard connection between the sealing member 130 and the first material pipe 110 or the second material pipe 120 due to material deposition is reduced, and further, the possibility of failure of flexible connection between the first material pipe 110 and the second material pipe 120 is improved, and the weighing accuracy of the metering device is improved. Further, the sealing member 130 is sealingly connected in the annular gap 140 between the first connecting portion 112 and the second connecting portion 122, so that the connection between the first material pipe 110 and the second material pipe 120 is sealed, the possibility of the material overflowing outwards from the connection between the first material pipe 110 and the second material pipe 120 (i.e. the annular gap 140) is reduced, the material is conveyed to the downstream device 300 as much as possible, the loss of the material is reduced, and the metering accuracy of the amount of the material entering the downstream device 300 is also improved.

When the connecting device 100 of the embodiment of the application is applied to a battery production system, the weighing accuracy of the metering device to the materials is improved, so that the production quality of relevant components of the battery is improved, the quality of the battery is improved, the possibility that the materials are used too much can be reduced, and the production cost of the battery is further reduced.

In this case, the connection device 100 may be connected between the upstream device 200 and the downstream device 300, and the influence of the upstream device 200 on the downstream device 300 or the downstream device 300 on the upstream device 200 may be reduced. In this embodiment, the second pipe 120 may be used to connect with the upstream device 200, the first pipe 110 may be used to connect with the downstream device 300, and when the material flows through the second pipe 120 to the first pipe 110, the material is not easy to further flow into the annular gap 140 between the first pipe 110 and the second pipe 120, so that the possibility that the material is accumulated between the first connecting portion 112 and the second connecting portion 122 is reduced, and the possibility that the second pipe 120 and the first pipe 110 form a hard connection to interfere with each other is further reduced.

According to some embodiments of the present application, with continued reference to fig. 2, 3 and 5, optionally, the seal 130 includes a flexible sleeve 134, the flexible sleeve 134 being connected between the first and second tubes 110, 120, the flexible sleeve 134 having oppositely disposed first and second ends 131, 132, the first end 131 being sealingly connected to the first tube 110, the second end 132 being sealingly connected to the second tube 120, the flexible sleeve 134 being loosely disposed between the first and second ends 131, 132.

The flexible sleeve 134 is a sleeve with high flexibility and can be deformed by small force, and can be rubber, a silicone sleeve, a cloth sleeve and the like. The flexible sleeve 134 may be disposed between the first tube 110 and the second tube 120, and at least on the outside of the junction of the first tube 110 and the second tube 120, where the flexible sleeve 134 may cover at least the annular gap 140, thereby sealing the annular gap 140. In some other embodiments, the flexible sleeve 134 may also be coupled to the inner side of the first tube 110 and/or the second tube 120.

The flexible sleeve 134 is conveniently assembled with the first and second feeding pipes 110 and 120, and can improve the assembly efficiency of the connecting device 100. The flexible sleeve 134 is loosely arranged, so that the flexible connection between the first material pipe 110 and the second material pipe 120 is reliable, and meanwhile, the relative position between the first material pipe 110 and the second material pipe 120 can have a certain degree of freedom, so that the flexible connection formed by the flexible sleeve 134 is not easy to fail even if the downstream equipment 300 is a vibrating screen or the like in the vibrating process of the vibrating screen.

Optionally, as shown in fig. 2, 3 and 5, the first end 131 is sleeved on the outer peripheral surface of the first material pipe 110 according to some embodiments of the present application; and/or, the second end 132 is sleeved on the outer peripheral surface of the second material pipe 120.

By sleeving the first end 131 of the flexible sleeve 134 on the outer circumferential surface of the first material pipe 110, the flexible sleeve 134 is convenient to connect and fix with the first material pipe 110. By sleeving the second end 132 of the flexible sleeve 134 on the outer circumferential surface of the second material pipe 120, the flexible sleeve 134 is more convenient to connect and fix with the second material pipe 120.

Optionally, as shown in fig. 2 to 5, the second body 121 is located outside the first tube 110 along the axial direction of the first tube 110, the first end 131 is sleeved on the first connecting portion 112 and is connected with the first connecting portion 112 in a sealing manner, and the second end 132 is sleeved on the second body 121 and is connected with the second body 121 in a sealing manner.

It will be appreciated that the second body portion 121 is located outside the first tube 110, and the second end 132 of the flexible sleeve 134 is connected to the second body portion 121, so that the operation is convenient during the process of fixing the flexible sleeve 134 to the first tube 110. Specifically, the second end 132 of the flexible sleeve 134 may be sleeved on the second body portion 121 near the second connecting portion 122.

The first end 131 of the flexible sleeve 134 is sleeved on the first connecting portion 112, and the flexible sleeve 134 can be sleeved from the end of the first connecting portion 112, so that the length of the flexible sleeve 134 sleeved on the first material pipe 110 is not required to be too long, and the operation is convenient.

Optionally, as shown in fig. 2 and 3, the connection device 100 further includes a first fixing member 150, where the first fixing member 150 is sleeved on the first end 131, and fixes the first end 131 to the first connection portion 112.

The first fixing member 150 may be a clip, or may be other fixing members that can be bound, such as a binding rope. Specifically, a first groove may be provided on the first end 131 of the flexible sleeve 134, and the first fixing member 150 may be disposed in the first groove to bind the first end 131 to the first connection part 112. The first groove can not only position the mounting position of the first fixing member 150, but also improve the fixing stability of the first fixing member 150 on the flexible sleeve 134, thereby improving the fixing effect of the first fixing member 150 on the flexible sleeve 134.

The first end 131 is sleeved with the first fixing member 150 to fix the flexible sleeve 134 to the first material pipe 110, so that the operation is convenient, and the fixing stability is good.

Optionally, according to some embodiments of the present application, the first fixing member 150 includes a first clip 151, and the first clip 151 is sleeved on the first end 131.

The number of the first clips 151 may be one or more, and the plurality of first clips 151 may be disposed at intervals along the axial direction of the first connecting portion 112 to enhance the fixing effect on the flexible sleeve 134. The first fixing member 150 may include only the first clip 151, or may include other fasteners in addition to the first clip 151.

The clamp (the first clamp 151) is used for fixing the flexible sleeve 134, so that the operation is convenient, the assembly efficiency of the flexible sleeve 134 and the first material pipe 110 is improved, the fastening force of the clamp is good, and the fixing stability of the flexible sleeve 134 and the first material pipe 110 can be improved.

Optionally, as shown in fig. 2 and 3, the connection device 100 further includes a second fixing member 160, where the second fixing member 160 is sleeved on the second end 132, and fixes the second end 132 on the second body 121.

The second fixing member 160 may be a clip, or may be other fixing members that can be bound, such as a binding rope. Specifically, a second groove may be provided on the second end 132 of the flexible sleeve 134, and a second fixing member 160 may be provided in the second groove to bind the second end 132 to the second body portion 121. The second groove can not only position the mounting position of the second fixing member 160, but also improve the fixing stability of the second fixing member 160 on the flexible sleeve 134, thereby improving the fixing effect of the second fixing member 160 on the flexible sleeve 134.

The second fixing member 160 is sleeved on the second end 132 to fix the flexible sleeve 134 to the second material pipe 120, so that the operation is convenient, and the fixing stability is good.

Optionally, according to some embodiments of the present application, the second fixing member 160 includes a second clip 161, and the second clip 161 is sleeved on the second end 132.

The number of the second clips 161 may be one or more, and the plurality of second clips 161 may be disposed at intervals along the axial direction of the second body portion 121 to enhance the fixing effect on the flexible sleeve 134. The second fixing member 160 may include only the second clip 161, or may include other fasteners in addition to the second clip 161.

The clamp (the second clamp 161) is used for fixing the flexible sleeve 134, so that the operation is convenient, the assembly efficiency of the flexible sleeve 134 and the second material pipe 120 is improved, the fastening force of the clamp is good, and the fixing stability of the flexible sleeve 134 and the second material pipe 120 can be improved.

Referring to fig. 5 in conjunction with fig. 6, fig. 6 schematically illustrates an enlarged view of portion a of fig. 5, optionally, according to some embodiments of the present application, the flexible sleeve 134 includes a middle bending portion 133, the middle bending portion 133 is disposed in the annular gap 140, and one end of the middle bending portion 133 is connected with the second end 132, and the other end of the middle bending portion 133 is connected with the first end 131 by bypassing one end of the first connecting portion 112 facing away from the first main body portion 111.

The mid-section bend 133 is part of the flexible sleeve 134 with both the first end 131 and the second end 132, and the flexible sleeve 134 may be of unitary construction. The middle bending portion 133 is disposed in the annular gap 140, so that at least one of the first connecting portion 112 and the second connecting portion 122 and the middle bending portion 133 can be in clearance fit, so as to reduce the possibility of soft connection failure caused by the middle bending portion 133 of the first material pipe 110 and the second material pipe 120. The middle bent portion 133 may be placed in the annular gap 140 without being disposed in a fixed structure where the first and second connection portions 112 and 122 are connected. The middle section bending part 133 can also be fixedly connected with the first connecting part 112 through the second fixing part 160, in this case, the second fixing part 160 can comprise a groove-shaped clamp, and the middle section bending part 133, the first connecting part 112 and the first end 131 are jointly clamped in a clamping groove of the groove-shaped clamp and then fastened and fixed through a fastener of the groove-shaped clamp.

The middle bending part 133 is located in the annular gap 140, and can play a role in stopping the material entering the annular gap 140, so that the possibility that the material enters the junction between the first end part 131 and the first connecting part 112 and the junction between the second end part 132 and the second main body part 121 along the annular gap 140 is reduced, and the reliability of soft connection of the flexible sleeve 134 is improved.

Optionally, according to some embodiments of the present application, the flow cross-section of the flexible sleeve 134 at the first end 131 is greater than the flow cross-section of the flexible sleeve 134 at the second end 132.

The flow cross-section of the flexible sleeve 134 at the first end 131 may be adapted to the outer diameter of the first connection 112 and the flow cross-section of the flexible sleeve 134 at the second end 132 may be adapted to the outer diameter of the second body 121. The flow-through section of the flexible sleeve 134 refers to a section of the flexible sleeve 134 along a direction perpendicular to the axis of the flexible sleeve 134. In the case where the flexible sleeve 134 is a cylindrical sleeve, the flow cross-section of the flexible sleeve 134 at the first end 131 is greater than the flow cross-section of the flexible sleeve 134 at the second end 132, and may be such that the inner diameter of the flexible sleeve 134 at the first end 131 is greater than the inner diameter of the flexible sleeve 134 at the second end 132.

The flow cross-sections of the first and second ends 131, 132 of the flexible sleeve 134 may allow for a better mating connection of the flexible sleeve 134 with the first and second tubes 110, 120.

According to some embodiments of the present application, optionally, the flow cross section of the flexible sleeve 134 tapers in the direction of the first end 131 to the second end 132.

In the direction from the first end 131 to the second end 132, it is understood with reference to one of the directions X, and specifically, with reference to the general downward-upward direction shown in fig. 2, 3, and 5.

Alternatively, the first body portion 111 is integrally formed with the first connecting portion 112 according to some embodiments of the present application; and/or the second body portion 121 and the second connecting portion 122 are integrally formed.

The first body 111 and the first connecting portion 112 may be integrally formed, that is, the first pipe 110 may be integrally formed, or the first body 111 and the first connecting portion 112 may be welded or fused together. The first main body 111 and the first connecting portion 112 are integrally formed, so that the processing is convenient, and the problem of poor sealing is not easy to occur.

The second body 121 and the second connecting portion 122 are integrally formed, that is, the second pipe 120 is integrally formed, or the second body 121 and the second connecting portion 122 may be welded or fused together. The second main body part 121 and the second connecting part 122 are arranged into an integrated structure, so that the processing is convenient, and the problem of loose sealing is not easy to occur.

Optionally, according to some embodiments of the present application, the first tube 110 and/or the second tube 120 are rigid tubes.

The first connecting portion 112 and the first body portion 111 may be hard tubes, and the second connecting portion 122 and the second body portion 121 may be hard tubes. The specific hard tube is a rigid tube with relatively high strength and hardness, and in this embodiment, the hardness of the first tube 110 and the second tube 120 is greater than that of the flexible sleeve 134, and in particular, the first tube 110 and the second tube 120 may be metal tubes, hard plastic tubes, or the like.

According to some embodiments of the present application, optionally, a distance L between an end of the first connecting portion 112 remote from the second body portion 121 and an end of the second connecting portion 122 remote from the first body portion 111 along the axial direction of the first material pipe 110 is in a range of 3 cm to 8 cm.

That is, the length of the overlapping portion of the first tube 110 and the second tube 120 may be in the range of 3 cm to 8 cm, and specifically, 3 cm, 4 cm, 5 cm, 6 cm, 7 cm, 8 cm. The larger the overlapping part of the first material pipe 110 and the second material pipe 120 is, the more favorable for the material flow, and the possibility of failure of flexible connection is reduced, but the assembly difficulty and the consumable cost of the material pipe are also improved, and the size limitation of the embodiment can not only meet the requirement of reducing the failure of flexible connection, but also avoid the excessive improvement of the assembly difficulty and the consumable cost.

The range of 0.5 cm to 1 cm may be reserved between the first clamping band 151 and the end portion of the first connecting portion 112, which is close to the second material tube 120, so that the first clamping band 151 may be stably fixed.

Optionally, as shown in fig. 4 and 6, a positioning member 190 is disposed on an end of the second body portion 121 near the second connecting portion 122 or on the second connecting portion 122 according to some embodiments of the present application.

The positioning member 190 may be provided on the outer peripheral surface of the second connecting portion 122, or may be provided on the outer peripheral surface of the end of the second body portion 121 near the second connecting portion 122. The positioning element 190 is used for positioning whether the plugging between the first connecting portion 112 and the second connecting portion 122 is in place. The positioning member 190 may be an indicator, such as a score line, a positioning tab, or the like, that an operator determines whether the first tube 110 is in place with the first tube 110 by observing whether the first sleeve is sleeved onto the second tube 120 at the location indicated by the positioning member 190.

The positioning member 190 improves convenience of assembling the first and second connection portions 112 and 122 by an operator and improves assembly efficiency.

Optionally, as shown in fig. 7, fig. 7 schematically illustrates a structural schematic diagram of a connection device according to some embodiments of the present application, where an end of the first main body portion 111 away from the first connection portion 112 is provided with a first connection member 170 for connecting with the downstream device 300, and an end of the second main body portion 121 away from the second connection portion 122 is provided with a second connection member 180 for connecting with the downstream device 300.

The first connector 170 may be fixedly connected to the first body portion 111, and the first connector 170 may facilitate connection of the first tube 110 with the downstream apparatus 300. The second connector 180 may be fixedly connected to the second body portion 121, and the second connector 180 may facilitate connection of the second pipe 120 to the upstream apparatus 200.

Optionally, according to some embodiments of the present application, the first connector 170 comprises a first flange 171 connected to the first body portion 111; and/or the second connector 180 includes a second flange 181 coupled to the second body portion 121.

In some embodiments, the first connecting member 170 includes a first flange 171 connected to the first main body 111, the first flange 171 is sleeved on an outer peripheral surface of the first main body 111 away from the first connecting portion 112, the first flange 171 may be a quick-connection flange, and the first flange 171 may improve the fixing reliability of the first pipe 110 and the upstream device 200, and is convenient to assemble.

In some embodiments, the second connecting piece 180 includes a second flange 181 connected to the second body 121, the second flange 181 is sleeved on an outer peripheral surface of the second body 121 away from the second connecting portion 122, the second flange 181 may be a quick-connection flange, and the second flange 181 may improve the fixing reliability of the second material pipe 120 and the upstream device 200, and is convenient to assemble.

Some embodiments of the present application also provide a battery production system, including an upstream device 200, a downstream device 300, and a connection apparatus 100 provided in the present application or any embodiment of the present application, where the upstream device 200 has a discharge port, the downstream device 300 has a feed port, the second pipe 120 is in communication with the discharge port of the upstream device 200, and the first pipe 110 is in communication with the feed port of the downstream device 300.

According to some embodiments of the present application, the upstream device 200 optionally comprises a metering means, the outlet of which forms the outlet of the upstream device 200.

As shown in fig. 2 to 7, the embodiment of the present application provides a connection device including a first material pipe 110, a second material pipe 120, and a sealing member 130. The first material pipe 110 is a hard pipe, the first material pipe 110 comprises a first main body part 111 and a first connecting part 112 which are integrally formed, the second material pipe 120 is a hard pipe, the second material pipe 120 comprises a second main body part 121 and a second connecting part 122 which are integrally formed, the second connecting part 122 is inserted into the first connecting part 112, an annular gap 140 is formed between the outer peripheral surface of the second connecting part 122 and the inner peripheral surface of the first connecting part 112, the second main body part 121 and the first main body part 111 are arranged in a mutually deviating way, and one end of the first main body part 111 away from the first connecting part 112 is provided with a first flange 171 used for being connected with downstream equipment 300; the end of the second body portion 121 remote from the second connection portion 122 is provided with a second flange 181 for connection with the downstream apparatus 300. The sealing member 130 is connected to the first and second material pipes 110 and 120, respectively, and seals the annular gap 140, and the first material pipe 110 is flexibly connected to the second material pipe 120 through the sealing member 130. The seal 130 comprises a flexible sleeve 134, the flow cross section of the flexible sleeve 134 at the first end 131 being adaptable to the outer diameter of the first connection 112, the flow cross section of the flexible sleeve 134 at the second end 132 being adaptable to the outer diameter of the second body 121, and the flow cross section of the flexible sleeve 134 tapering in the direction from the first end 131 to the second end 132. Along the axial direction of the first material pipe 110, the second body portion 121 is located outside the first material pipe 110, the first end portion 131 is sleeved on the first connecting portion 112 and is in sealing connection with the first connecting portion 112, and the second end portion 132 is sleeved on the second body portion 121 and is in sealing connection with the second body portion 121. The connection device 100 further includes a first clip 151 and a second clip 161, where the first clip 151 is sleeved on the first end 131 and fixes the first end 131 to the first connection portion 112, and the second clip 161 is sleeved on the second end 132 and fixes the second end 132 to the second body 121. The flexible sleeve 134 includes a middle bending portion 133, the middle bending portion 133 is disposed in the annular gap 140, and one end of the middle bending portion 133 is connected with the second end 132, and the other end of the middle bending portion 133 bypasses the first connecting portion 112 and is connected with the first end 131 away from the first main body portion 111.

The connecting device of the embodiment designs the connecting mode of the first material pipe 110 and the second material pipe 120 into an embedded structure, the flexible or soft flexible sleeve 134 does not participate in material circulation, the dependence of the material circulation on soft connection is reduced, and the material circulation is not easy to accumulate and easy to clean.

The foregoing description of various embodiments is intended to highlight differences between the various embodiments, which may be the same or similar to each other by reference, and is not repeated herein for the sake of brevity.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (19)

1. A connection device, comprising:

a first material pipe including a first connection portion and a first main body portion connected to each other in an axial direction of the first material pipe;

the second material pipe comprises a second main body part and a second connecting part which are mutually connected along the axial direction of the second material pipe, the second connecting part is inserted into the first connecting part, the outer peripheral surface of the second connecting part and the inner peripheral surface of the first connecting part are arranged at intervals, an annular gap is formed, so that the second material pipe and the first material pipe are arranged at intervals, and the second main body part and the first main body part are arranged away from each other;

and the sealing piece is respectively connected with the first material pipe and the second material pipe and seals the annular gap, and the first material pipe is flexibly connected with the second material pipe through the sealing piece.

2. The connection device of claim 1, wherein the seal comprises a flexible sleeve connected between the first and second tubes, the flexible sleeve having oppositely disposed first and second ends, the first end being sealingly connected to the first tube and the second end being sealingly connected to the second tube, the flexible sleeve being loosely disposed between the first and second ends.

3. The connecting device according to claim 2, wherein the first end portion is sleeved on the outer peripheral surface of the first material pipe;

and/or the second end part is sleeved on the outer circumferential surface of the second material pipe.

4. A connecting device according to claim 3, wherein the second body portion is located outside the first tube in the axial direction of the first tube, the first end portion is sleeved on the first connecting portion and is in sealing connection with the first connecting portion, and the second end portion is sleeved on the second body portion and is in sealing connection with the second body portion.

5. The connection device of claim 4, further comprising a first fastener that is disposed over the first end and secures the first end to the first connection portion.

6. The connection device of claim 5, wherein the first securing member comprises a first clip that is received over the first end.

7. The connection device of claim 4, further comprising a second securing member that is disposed over the second end portion and secures the second end portion to the second body portion.

8. The connection device of claim 7, wherein the second securing member comprises a second clip that is received over the second end.

9. The connection device of claim 4, wherein the flexible sleeve comprises a middle section bending portion disposed in the annular gap, one end of the middle section bending portion is connected to the second end, and the other end of the middle section bending portion is connected to the first end portion while bypassing one end of the first connection portion facing away from the first body portion.

10. The connection device of any one of claims 2-9, wherein the flow cross-section of the flexible sleeve at the first end is greater than the flow cross-section of the flexible sleeve at the second end.

11. The connection device of claim 9, wherein the flow cross section of the flexible sleeve tapers in a direction from the first end to the second end.

12. The connection device of any one of claims 1-9, wherein the first body portion is of unitary construction with the first connection portion;

and/or the second main body part and the second connecting part are of an integral structure.

13. The connection device of claim 12, wherein the first and/or second tube is a rigid tube.

14. The connection device according to any one of claims 1-9, wherein a distance between an end of the first connection portion facing away from the second body portion and an end of the second connection portion facing away from the first body portion in an axial direction of the first tube is in a range of 3 cm to 8 cm.

15. A connection device according to any one of claims 1 to 9, wherein a locating member is provided on or near one end of the second body portion adjacent the second connection portion.

16. A connection device according to any one of claims 1 to 9, wherein the end of the first body portion remote from the first connection portion is provided with a first connection for connection with downstream equipment, and the end of the second body portion remote from the second connection portion is provided with a second connection for connection with upstream equipment.

17. The connection device of claim 16, wherein the first connection member comprises a first flange connected to the first body portion;

and/or the second connector comprises a second flange connected to the second body portion.

18. A battery production system, comprising:

upstream equipment with a discharge port;

a downstream device having a feed port;

the connecting device of any one of claims 1-17, said second conduit communicating with said outlet of said upstream apparatus and said first conduit communicating with said inlet of said downstream apparatus.

19. The battery production system of claim 18, wherein the upstream device comprises a metering device, a discharge port of the metering device forming a discharge port of the upstream device.