CN216120411U

CN216120411U - Exhaust device for battery formation and formation system

Info

Publication number: CN216120411U
Application number: CN202122442268.9U
Authority: CN
Inventors: 汪志明; 苗思宇; 黄彩虾; 唐鸣浩
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2022-03-22
Anticipated expiration: 2031-10-11
Also published as: WO2023061218A1

Abstract

The application provides an exhaust apparatus and system that becomes for battery ization becomes, this exhaust apparatus includes main part and exhaust portion. The main part has and holds the chamber, and this main part seted up with hold gas vent and interface that the chamber communicates, the gas vent is used for being connected with the casing of battery. The exhaust part is provided with an exhaust channel which runs through from the first end to the second end, the first end of the exhaust part extends into the accommodating cavity through the plug port, and the exhaust part can move along the plug port so as to enable the first end of the exhaust part to be connected with or separated from the exhaust port. Because the formation system comprises the exhaust device, the formation system can also reduce the electrolyte loss in the formation process of the battery and can timely exhaust the gas, and the electrochemical performance of the battery is prevented from being influenced.

Description

Exhaust device for battery formation and formation system

Technical Field

The application relates to the technical field of batteries, in particular to an exhaust device and a formation system for battery formation.

Background

In the manufacturing process of the secondary battery, an important process, namely, a solid electrolyte interface film (SEI film for short) is formed on the surface of an electrode material during the first charging, and the SEI film can improve the cycle performance and the service life of the battery. However, a large amount of gas (abbreviated as "formation gas") is generated during the formation process, and the gas can affect the formation of the SEI film, thereby affecting the cycle performance and the service life of the battery.

At present, a vacuum source and a pipeline connecting the vacuum source and an internal chamber of the battery are generally used for exhausting gas generated in the battery formation process, however, electrolyte in the battery is also easily taken out along with the exhaust of the gas, so that the loss of the electrolyte is caused, and the gas cannot be exhausted in time, so that the electrochemical performance of the battery is influenced.

SUMMERY OF THE UTILITY MODEL

The application provides an exhaust apparatus and formation system for battery formation, can reduce battery formation in-process electrolyte loss simultaneously, can also in time discharge gas.

In a first aspect, the present application provides an exhaust for battery formation, comprising:

the main body is provided with an accommodating cavity, the main body is provided with an air outlet and a plug port which are communicated with the accommodating cavity, and the air outlet is used for being connected with a shell of a battery;

the exhaust part is provided with an exhaust channel which penetrates from the first end to the second end, the first end of the exhaust part extends into the accommodating cavity through the inserting port, and the exhaust part can move along the inserting port so as to enable the first end of the exhaust part to be connected with or separated from the exhaust port.

In the technical scheme of the application, the containing cavity of the main body can contain electrolyte and gas generated in the formation process, the first end of the exhaust part is separated from the exhaust port at the early stage of the formation process of the battery, part of the electrolyte in the battery can enter the containing cavity of the main body through the exhaust port along with the formed gas, the formed gas can be exhausted along the exhaust channel of the exhaust part, and the electrolyte is stored in the containing cavity; at the later stage of the battery formation process, the exhaust part can move along the insertion port of the main body so as to enable the first end of the exhaust part to be connected with the exhaust port, at the moment, the formation gas can be directly exhausted through the exhaust channel of the exhaust part, and the electrolyte does not continue to be exhausted along with the formation gas due to the fact that the liquid level of the electrolyte of the battery descends. After the formed gas is substantially discharged, the first end of the exhaust part is separated from the exhaust port, and at this time, the electrolyte stored in the accommodating chamber can be returned into the battery through the exhaust port. Therefore, the technical scheme of the application can discharge gas in time and reduce the loss of electrolyte in the battery formation process.

In some embodiments of the present application, the first end of the exhaust portion is plugged into the exhaust port when the first end of the exhaust portion is coupled to the exhaust port. Therefore, the first end of the exhaust part is connected with the exhaust port more tightly, and further electrolyte in the battery shell can be prevented from being further taken out, so that the loss of the electrolyte is reduced.

In some embodiments of the present application, the outer wall of the first end of the exhaust portion is in sealing fit with the inner wall of the exhaust port, which can facilitate formation of a unique gas exhaust channel, and improve the exhaust effect of the formed gas. Meanwhile, the discharge rate of the formed gas can be increased.

In some embodiments of the present application, the first end of the gas exhaust part may protrude out of the main body through the gas exhaust port for protruding into the case of the battery, which may further rapidly exhaust the gas inside the battery case.

In some embodiments of the present application, the main body further defines an adjusting opening communicated with the accommodating cavity, and the adjusting opening is used for adjusting the air pressure in the accommodating cavity. Become earlier stage at the battery, can make through this regulation mouth and hold the intracavity and produce the negative pressure, and then can press into gas and electrolyte in the battery case to holding the intracavity fast and save, after the produced gas outgoing of battery formation in-process, the accessible produces the malleation and makes electrolyte fast and flow back to the battery case as far as possible completely in to further reduction battery formation in-process electrolyte ground loss.

In some embodiments of the present application, the main body includes a cylindrical section and a conical section, the insertion port and the adjustment port are both opened at an end of the cylindrical section far away from the conical section, and the exhaust port is opened at a conical end of the conical section. The exhaust port is arranged at the conical end of the conical section of the main body, so that the connection between the exhaust port and the battery shell can be facilitated, and the working efficiency can be improved. In addition, the main body comprises a cylindrical section and a conical section, so that the electrolyte in the accommodating cavity of the main body can be quickly and completely reflowed into the battery shell as far as possible.

In some embodiments of the present application, the exhaust port and the insertion port are disposed opposite to each other, which facilitates the connection between the exhaust portion and the exhaust port, and simultaneously facilitates the formation of a direct and shortest-distance exhaust passage, thereby improving the exhaust efficiency of the formed gas.

In some embodiments of the present application, the exhaust portion is a hollow rod body, which is simple in structure, easy to obtain, and low in cost, so that the manufacturing cost of the exhaust device can be reduced.

In a second aspect, the present application further provides a formation system comprising the exhaust apparatus described in any of the above embodiments.

In the technical solution of the present application, the formation system includes the exhaust apparatus in the above embodiment, and the exhaust apparatus includes a main body and an exhaust portion. The main part has and holds the chamber, and this main part seted up with hold gas vent and interface that the chamber communicates, the gas vent is used for being connected with the casing of battery. The exhaust part is provided with an exhaust channel which runs through from the first end to the second end, the first end of the exhaust part extends into the accommodating cavity through the plug port, and the exhaust part can move along the plug port so as to enable the first end of the exhaust part to be connected with or separated from the exhaust port. Because the formation system comprises the exhaust device, the formation system can also reduce the electrolyte loss in the formation process of the battery and can timely exhaust the gas, and the electrochemical performance of the battery is prevented from being influenced.

In some embodiments of the present application, the main body of the exhaust device is provided with an adjusting port communicated with the accommodating cavity; the formation system further comprises a pressure adjusting device, and the pressure adjusting device is connected with the adjusting port. The pressure regulating device can improve the discharge rate of gas generated in the formation process of the battery, and further improve the formation rate of the battery.

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

Drawings

Various additional 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. Moreover, like reference numerals are used to refer to like elements throughout. In the drawings:

FIG. 1 is a schematic structural view of an exhaust device according to some embodiments of the present application;

FIG. 2 is a top view of an exhaust device according to some embodiments of the present application;

FIG. 3 is a side view of an exhaust device according to some embodiments of the present application;

FIG. 4 is a schematic view of an exhaust port coupled to an exhaust port of an exhaust apparatus according to some embodiments of the present disclosure;

fig. 5 is a schematic structural view illustrating a structure in which an exhaust portion is separated from an exhaust port in an exhaust apparatus according to some embodiments of the present disclosure.

The reference numbers in the detailed description are as follows:

10-an exhaust;

11-a body;

111-a containment chamber;

112-an exhaust port;

113-a socket;

114-an adjustment port;

115-cylindrical section;

116-a conical section;

12-an exhaust section;

121-a first end;

122-second end.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.

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 "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase 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. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in 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 pieces" refers to two or more (including two).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the directions or positional relationships indicated in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

A secondary battery (Rechargeable battery), also called a Rechargeable battery or a secondary battery, is a battery that can be continuously used by activating an active material by charging after the battery is discharged. When the battery is manufactured, the electrode material of the battery is not in an optimal use state, or the physical property is not good (such as particles are too large and contact is not tight), or the phase itself is not right (such as metal oxide cathodes of some alloy mechanisms), and the first charge and discharge are needed to activate the anode material and the cathode material, namely formation is carried out.

During the formation process of the battery, lithium ions are removed from the positive active material, sequentially pass through the electrolyte, the diaphragm and the electrolyte, and are embedded into the negative material layer. In this process, electrons migrate along the peripheral circuit from the positive electrode to the negative electrode. At this time, electrons may first react with the electrolyte to generate an SEI film and a part of gas due to lithium ions being intercalated into the negative electrode at a lower potential. However, gas generated in this process may affect the formation of an SEI film, thereby affecting the cycle performance and the lifespan of the battery.

At present, the vacuum source and the pipeline connecting the vacuum source and the inner cavity of the battery are usually used for discharging gas generated in the battery formation process, however, electrolyte in the battery is also easily taken out along with the discharge of the gas, so that the loss of the electrolyte can be caused, the gas cannot be discharged in time, the gas which is not discharged is remained in the battery, the phenomena of black spots, lithium precipitation and the like can be caused on the interface of an electrode pole piece, and the electrochemical performance of the battery is influenced.

In order to solve the problems of excessive electrolyte loss and incapability of timely discharging gas in the battery formation process in the prior art, the application provides the exhaust device for the battery formation, the first end of the exhaust part is separated from the exhaust port in the earlier stage of the battery formation process, part of electrolyte in the battery can enter the containing cavity of the main body along with the formed gas through the exhaust port, wherein the formed gas can be discharged along the exhaust channel of the exhaust part, and the electrolyte is stored in the containing cavity; at the later stage of the battery formation process, the exhaust part can move along the insertion port of the main body so as to enable the first end of the exhaust part to be connected with the exhaust port, at the moment, the formation gas can be directly exhausted through the exhaust channel of the exhaust part, and the electrolyte does not continue to be exhausted along with the formation gas due to the fact that the liquid level of the electrolyte of the battery descends. After the formed gas is substantially discharged, the first end of the exhaust part is separated from the exhaust port, and at this time, the electrolyte stored in the accommodating chamber can be returned into the battery through the exhaust port. Therefore, the technical scheme of the application can discharge gas in time and reduce the loss of electrolyte in the battery formation process.

Referring to fig. 1, the exhaust device 10 for battery formation provided by the present application includes a main body 11 and an exhaust part 12, the main body 11 has an accommodating cavity 111, and the main body 11 is opened with an exhaust port 112 and a socket 113 which are communicated with the accommodating cavity 111, and the exhaust port 111 is used for connecting with a casing of a battery. The exhaust part 12 has an exhaust channel penetrating from the first end 121 to the second end 122, the first end 121 of the exhaust part 12 extends into the accommodating cavity 111 through the insertion port 113, and the exhaust part 12 can move along the insertion port 113 to couple or decouple the first end 121 of the exhaust part 12 and the exhaust port 112. It is understood that, in the early stage of the battery formation process, the first end 121 of the exhaust portion 12 is separated from the exhaust port 112, and a part of the electrolyte in the battery can enter the accommodating cavity 111 of the main body 11 along with the formation gas through the exhaust port 112. Furthermore, the distance between the first end 121 of the exhaust part 12 and the exhaust port 112 is such that the formation gas can be exhausted along the exhaust passage of the exhaust part 12, while the electrolyte is stored in the housing chamber 111; at the later stage of the battery formation process, the exhaust part 12 can move along the insertion port 113 of the main body 11 to connect the first end 121 of the exhaust part 12 with the exhaust port 112, and at this time, the formation gas can be directly exhausted through the exhaust channel of the exhaust part 12, and the electrolyte cannot be continuously exhausted along with the formation gas due to the liquid level of the battery electrolyte. After the formation gas is substantially discharged, the first end 121 of the gas discharge portion 12 is separated from the gas discharge port 112, and at this time, the electrolyte stored in the accommodating chamber 11 may be returned into the battery through the gas discharge port 112.

In the embodiments provided in the present application, the shape, material and volume of the main body 11 are not specifically limited, and may be selected according to the requirements of specific practical applications. Illustratively, the shape of the body 11 may be square, circular, conical, or a combination of various shapes. The material can be metal or plastic. For example, the material of the battery case may be, but is not limited to, copper and aluminum. While the volume of the body 11 may be, but is not limited to, 5L-50L, for example, the volume of the body 11 may be 5L, 10L, 15L, 20L, 25L, 30L, etc.

Referring to fig. 2, in some embodiments of the present application, the main body 11 further defines an adjusting port 114 communicating with the accommodating cavity 111, and the adjusting port 114 is used for adjusting the air pressure in the accommodating cavity 111. In the earlier stage of formation of the battery, negative pressure can be generated in the accommodating cavity 111 through the adjusting port 114, gas and electrolyte in the battery shell are pressed into the accommodating cavity 111 to be stored as quickly as possible, and after the gas generated in the formation process of the battery is basically discharged, the electrolyte flows back into the battery shell as completely as possible, so that the loss of the electrolyte in the formation process of the battery is further reduced.

Further, referring to fig. 3, in some embodiments of the present application, the main body 11 includes a cylindrical section 115 and a conical section 116, and the conical section 116 is located below the cylindrical section 115, a cavity in the conical section 116 and a cavity in the cylindrical section 115 are communicated to form the receiving cavity 111 of the main body 11, the insertion port 113 and the adjustment port 114 are both opened at an end of the cylindrical section 115 far from the conical section 116, and the exhaust port 112 is opened at a tapered end of the conical section 116. Disposing the vent 112 at the tapered end of the conical section 116 of the main body 11 can facilitate the connection of the vent 112 with the battery case, thereby improving the working efficiency. In addition, the main body 11 includes the cylindrical section 115 and the conical section 116, which facilitates the electrolyte in the accommodating cavity 111 of the main body 11 to flow back into the battery case quickly and completely as much as possible.

In other embodiments of the present application, the main body 11 may further include a square section and a conical section, the conical section is located below the square section, the insertion port 113 and the adjustment port 114 are both opened at one end of the square section far away from the conical section, and the exhaust port 112 is opened at the conical end of the conical section.

Referring to fig. 4, in some embodiments of the present application, when the first end 121 of the exhaust part 12 is coupled to the exhaust port 112, the first end 121 of the exhaust part 12 is inserted into the exhaust port 112. Therefore, the first end of the exhaust part is connected with the exhaust port more tightly, and further electrolyte in the battery shell can be prevented from being further taken out, so that the loss of the electrolyte is reduced.

Referring to fig. 5, after the formed gas is substantially discharged, the first end 121 of the gas discharge part 12 is separated from the gas discharge opening 112, and at this time, the electrolyte stored in the accommodating chamber 111 may be returned into the battery through the gas discharge opening 112.

In addition, in the above embodiment, the detachment or coupling of the first end 121 of the exhaust part 12 and the exhaust port 112 can discharge the gas generated in the battery formation process in time, thereby avoiding the appearance of black spots, lithium deposition and the like on the electrode plate. Meanwhile, the loss of the electrolyte can be reduced, so that the aim of improving the electrochemical performance of the battery is fulfilled.

With continued reference to fig. 5, in some embodiments of the present application, the outer wall of the first end 121 of the exhaust portion 12 is in sealing engagement with the inner wall of the exhaust port 112, which can facilitate forming a single gas exhaust channel to improve the exhaust effect of the formed gas. Meanwhile, the discharge rate of the formed gas can be increased.

In other embodiments of the present application, the first end 121 of the exhaust part 12 may extend out of the main body 11 through the exhaust port 112 to be used for extending into the battery case, and the length of the part of the exhaust part 12 extending into the battery case is smaller than the distance between the electrolyte level in the battery case and the top of the battery case, so that the gas in the battery case can be further rapidly exhausted, and the phenomenon that the gas remains in the battery to cause the electrode plate to generate black spots and lithium deposition, which affects the electrochemical performance of the battery, is prevented.

In some embodiments of the present disclosure, the exhaust port 112 and the insertion port 113 are disposed opposite to each other, which facilitates the connection between the exhaust portion 12 and the exhaust port 112 via the insertion port 113, and also facilitates the formation of a direct and shortest-distance exhaust passage, thereby improving the exhaust efficiency of the forming gas.

In some embodiments of the present application, the exhaust portion 12 is a hollow rod body, which is simple in structure, easy to obtain, and low in cost, so that the manufacturing cost of the exhaust device 10 can be reduced.

Based on the same inventive concept of the present application, the present application also provides a formation system including the exhaust apparatus 10 in any one of the embodiments described above.

In the technical solution of the present application, the formation system includes the exhaust device 10 in the above embodiment, and the exhaust device 10 includes a main body 11 and an exhaust portion 12. The main body 11 has a containing cavity 111, and the main body 11 is opened with an air outlet 112 and an insertion port 113 which are communicated with the containing cavity 111, and the air outlet 111 is used for connecting with the shell of the battery. The exhaust part 12 has an exhaust channel penetrating from the first end 121 to the second end 122, the first end 121 of the exhaust part 12 extends into the accommodating cavity 111 through the insertion port 113, and the exhaust part 12 can move along the insertion port 113 to couple or decouple the first end 121 of the exhaust part 12 and the exhaust port 112. Because the formation system comprises the exhaust device 10, the formation system can also reduce the electrolyte loss in the formation process of the battery, and can timely exhaust gas, thereby avoiding images such as black spots, lithium precipitation and the like on an electrode plate, and further achieving the purpose of improving the electrochemical performance of the battery.

In some embodiments of the present application, the formation system further comprises a pressure regulating device connected to the exhaust portion 12 and/or the receiving chamber 111. The pressure regulating device can improve the discharge rate of gas generated in the formation process of the battery, and further improve the formation rate of the battery.

In the embodiments provided herein, the pressure regulating device is not particularly limited and may be any pressure regulating device known to those skilled in the art. For example, in some specific embodiments of the present application, the pressure regulating device may be a vacuum pump.

Next, specific use steps of the formation system will be described in detail.

The battery is in the earlier stage of becoming the process, uses to become the system and carries out preliminary bleeding to the electric core in the battery, and the first end and the gas vent 112 of exhaust portion 12 break away from promptly, utilizes the vacuum pump to the chamber 111 that holds of main part 11 to carry out depressurization treatment, makes to hold and forms the negative pressure in the chamber 111 to become the gas that the in-process produced with electric core and partial electrolyte suction to holding in the chamber 111.

When the electrolyte in the accommodating cavity 111 reaches a certain amount, the formation is stopped, that is, no gas is generated, the exhaust part 12 extends into the main body 11 through the insertion port 113 and is in sealing fit with the exhaust port 112, and then the vacuum pump is connected with the second end 122 of the exhaust part 12, so that the gas in the battery is removed, and the formation of an SEI film on the surface of the electrode material is ensured.

After the SEI film is formed on the surface of the electrode material, the exhaust part 12 is separated from the exhaust port 112, so that positive pressure is formed in the accommodating cavity 11, and the electrolyte is forced to flow back into the core. So reciprocal for become the charging process and bleed and the electrolyte of backward flow and be in different routes respectively, take away partial electrolyte when having avoided gas outflow to outside, thereby when reaching in time a large amount of gases of discharging, can also reduce the electrolyte loss volume.

The following further illustrates specific advantageous effects of the formation system of the present application by specific embodiments.

Product A formation gas production reaches 10L, adopt the exhaust apparatus 10 that this application provided, after annotating the liquid infiltration with the electric core of product A, become, in the formation to 3.9V ~ 4.5V stage, adopt the interval to take out the negative pressure, hold the first end 121 and the gas vent 112 of the exhaust portion 12 in the chamber 11 promptly and break away from (break away from 10min) and the first end 121 and the gas vent 112 of exhaust portion 12 sealed fit (sealed fit 1min), become after 6h, there is not residual gas in the electric core, and the electrode piece interface does not have the black spot and the appearance of lithium deposition phenomenon, electrolyte loss has reduced about 90% simultaneously.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions 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 solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims

1. An exhaust apparatus for battery formation, comprising:

2. The exhaust apparatus as claimed in claim 1, wherein the first end of the exhaust portion is inserted into the exhaust port when the first end of the exhaust portion is coupled to the exhaust port.

3. The exhaust apparatus as claimed in claim 2, wherein an outer wall of the first end of the exhaust portion is in sealing engagement with an inner wall of the exhaust port.

4. The vent apparatus of claim 2, wherein a first end of the vent portion is extendable out of the body through the vent for extension into a housing of the battery.

5. The exhaust device as claimed in claim 1, wherein the main body further defines an adjustment port communicating with the accommodating chamber, the adjustment port being configured to adjust the air pressure in the accommodating chamber.

6. The exhaust apparatus as claimed in claim 5, wherein the main body includes a cylindrical section and a conical section, the insertion opening and the adjustment opening are both opened at an end of the cylindrical section remote from the conical section, and the exhaust opening is opened at a conical end of the conical section.

7. The exhaust apparatus as claimed in claim 1, wherein the exhaust port and the socket are oppositely disposed.

8. The exhaust apparatus as claimed in claim 1, wherein the exhaust portion is a hollow rod body.

9. A chemical conversion system, characterized in that it comprises an exhaust device according to any one of claims 1 to 8.

10. The formation system according to claim 9, wherein the main body of the exhaust device is provided with an adjusting port communicated with the accommodating cavity;

the formation system further comprises a pressure adjusting device, and the pressure adjusting device is connected with the adjusting port.