CN219869102U - Graphitization furnace and battery production system - Google Patents

Abstract

The utility model relates to a graphitizing furnace and a battery production system. Therefore, when the electrode can be in spray cooling, heat on the electrode is exchanged with the cooling medium through the protective structure, so that the surface temperature of the electrode is reduced. Because the protection structure can form physical protection to the electrode that stretches out the furnace body outside, consequently, if the electrode is in when spraying cooling process, the electrode can not directly contact with cooling medium and lead to cooling medium to permeate to the electrode in the part in the furnace body, reduces the electrode and takes place the etching probability at spraying cooling in-process. So design, utilize protective structure can promote the life of electrode when being convenient for realize effectively cooling.

Description

Graphitization furnace and battery production system

Technical Field

The utility model relates to the technical field of graphitization, in particular to a graphitization furnace and a battery production system.

Background

The graphitization furnace is equipment for applying an electric field to the materials in the furnace through graphite electrodes by utilizing the resistance property of the materials, so that the materials generate heat in the electrifying process to perform high-temperature reaction. In the heating process, a spraying mode is generally adopted to cool the part of the graphite electrode extending out of the furnace body so as to reduce the oxidation degree of the graphite electrode. However, the defects of the graphitization furnace structure design are limited, so that the graphite electrode is easy to etch in the process of spraying and cooling, and the service life of the graphite electrode is reduced.

Disclosure of Invention

Based on this, it is necessary to provide a graphitization furnace and a battery production system, which can facilitate effective cooling and improve the service life of the electrode.

In a first aspect, the present utility model provides a graphitization furnace comprising: a furnace body; the electrode extends out of the furnace body from the furnace body; the graphitizing furnace further comprises a protection structure, wherein the protection structure is at least partially arranged on the part of the electrode extending out of the furnace body and is in heat conduction fit with the electrode.

According to the graphitizing furnace, the electrode extending out of the furnace body is provided with the protection structure, and the part protected on the electrode is in heat conduction fit with the electrode. Therefore, when the electrode can be in spray cooling, heat on the electrode is exchanged with the cooling medium through the protective structure, so that the surface temperature of the electrode is reduced. Because the protection structure forms physical protection to the electrode that stretches out outside the furnace body, consequently, if the electrode is in when spraying cooling process, the electrode can not directly contact with cooling medium and lead to cooling medium to permeate to the electrode in the part in the furnace body, reduces the electrode and takes place the etching probability at spraying cooling in-process. So design, utilize protective structure can promote the life of electrode when being convenient for realize effectively cooling.

In some embodiments, the protective structure comprises a heat conducting member that wraps around a portion of the electrode that extends outside the furnace body. Therefore, the heat conducting piece is coated on the part of the electrode extending out of the furnace body, so that not only is the conduction temperature of the electrode reduced, but also the electrode is protected, the etching probability of the electrode is reduced, and the service life of the electrode is prolonged.

In some embodiments, the thickness of the thermally conductive member is denoted as h, wherein h satisfies the condition: h is more than or equal to 8 mu m and less than or equal to 10mm. Thus, the thickness of the heat conducting piece is controlled between 8 mu m and 10mm, so that the cooling effect and the protection effect of the electrode are both considered.

In some embodiments, h also satisfies the condition that: h is more than or equal to 20 mu m and less than or equal to 2mm. Thus, the thickness of the heat conducting piece is controlled to be between 20 mu m and 2mm, so that the cooling effect and the protection effect of the counter electrode can be further improved.

In some embodiments, the thermal conductivity of the thermally conductive member is denoted as λ, where λ satisfies the condition: lambda is more than or equal to 50W/(m.K) and less than or equal to 400W/(m.K). Thus, the heat conductivity coefficient of the heat conducting piece is reasonably controlled between 50W/(m.K) and 400W/(m.K), and the heat conduction on the electrode is improved, so that the cooling effect of the electrode is improved.

In some embodiments, the protective structure further comprises a seal member, the seal member being sealingly disposed between the heat transfer member and the furnace body. Therefore, the heat conducting piece is in sealing connection with the furnace body by the sealing piece, the extending part of the electrode is completely covered, and the possibility that a cooling medium enters the furnace body along the length direction of the electrode is reduced.

In some embodiments, the furnace body is provided with a protruding part arranged around the periphery of the electrode, a part of the heat conducting piece extends between the protruding part and the electrode, and the sealing piece is at least partially plugged between the protruding part and the heat conducting piece. Therefore, the sealing element is plugged between the protruding part and the heat conducting element, so that a gap at the junction between the electrode and the furnace body can be effectively closed, and the possibility that a cooling medium enters the furnace body is reduced; and the heat conducting piece can be pressed on the electrode, so that the cooling effect and the protection effect of the electrode are improved.

In some embodiments, the seal member is interposed between the boss and the heat conducting member at one end thereof spaced from the furnace body and forms a closed chamber with the boss and the electrode. Therefore, a cavity is formed by enclosing the sealing piece between the protruding part and the electrode, the cooling medium and the external air are isolated, the protection effect of the electrode is further improved, and the service life of the electrode is further prolonged.

In some embodiments, the sealing member comprises a plugging portion and a limiting portion connected with the plugging portion, the plugging portion is plugged between the protruding portion and the heat conducting member, and the limiting portion is abutted with one end, opposite to the furnace body, of the protruding portion. Therefore, the abutting limit of the limit part and one end of the protruding part is utilized to effectively control the plugging degree of the plugging part, so that the sealing element can be conveniently installed and kept consistent.

In some embodiments, the seal is at least partially configured as an insulating structure to block electrical communication between the boss and the electrode. Therefore, at least one part of the sealing element is designed to be of an insulating structure, so that insulation is kept between the protruding part and the electrode, and the occurrence of the risk that the electrode needs to be electrified to conduct electricity to the furnace body is reduced.

In some embodiments, the distance between the end of the sealing element facing away from the furnace body and the furnace body is denoted as H1, and the length of the electrode extending outside the furnace body is denoted as H2, wherein H1 < H2. The length of the control electrode extending out of the furnace body is larger than the interval between one end face of the sealing element and the furnace body, so that a part of the electrode also extends out of the sealing element, and at least a part of the electrode is exposed for cooling.

In some embodiments, the ratio between H2 and H1 satisfies the condition: H2/H1 is more than or equal to 3 and less than or equal to 15. The ratio of H2 to H1 is reasonably controlled between 3 and 15, and the sealing effect and the cooling effect can be effectively considered.

In some embodiments, the protective structure further comprises a thermally conductive agent filled between the thermally conductive member and the electrode. Therefore, the gap between the heat conducting piece and the electrode is filled with the heat conducting agent, the heat conducting area is increased, and the heat conducting efficiency is improved.

In some embodiments, the protection structure further includes a heat dissipation portion, and the heat dissipation portion is protruding from the heat conducting member. So, set up the radiating portion on the heat conduction spare, increase heat radiating area, promote heat conduction efficiency to be favorable to promoting the cooling effect of electrode.

In some embodiments, the heat dissipation parts are plural, at least part of the heat dissipation parts are arranged on the heat conduction member in parallel and at intervals. Therefore, a plurality of heat dissipation parts are arranged on the heat conduction piece at intervals, so that the heat dissipation area can be further increased, and the heat conduction efficiency is improved.

In a second aspect, the present utility model provides a battery production system comprising a graphitization furnace of any one of the above.

Drawings

FIG. 1 is a schematic view of a partial structure of a graphitization furnace according to one or more embodiments.

FIG. 2 is a schematic view of a portion of an electrode and guard structure mating structure according to one or more embodiments.

Fig. 3 is a cross-sectional view of the structure shown in fig. 2.

Fig. 4 is an enlarged schematic view of the structure at circle a in fig. 3.

100. A graphitizing furnace; 10. a protective structure; 11. a heat conductive member; 12. a seal; 121. a plug-in part; 122. a limit part; 13. a heat conducting agent; 14. a heat dissipation part; 20. a furnace body; 21. a boss; 30. an electrode; 40. a chamber; x, height direction.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that, if any, these 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 used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

Graphitization furnace is a device that utilizes the resistance property of the material, and applies an electric field to the material in the furnace through graphite electrodes, so that the material generates heat in the process of electrifying to perform high-temperature reaction, for example: it may be, but is not limited to, an acheson graphitizing furnace, an internal string graphitizing furnace, a vacuum graphitizing furnace, a continuous graphitizing furnace, etc.

Graphite electrodes are generally divided into a positive electrode and a negative electrode, the negative electrode graphite electrode is generally arranged at the lower end of a furnace body of a graphitizing furnace, the graphite electrode is fixed on the furnace body in the form of an electrode pair, and one end of the graphite electrode extends out of the furnace body. In the graphitization process, the core temperature of the furnace body should be maintained at a higher temperature, such as: the core temperature can be controlled to 2800-3000 ℃, and the like, so that the graphitization degree of the produced graphite anode material is good. However, controlling such a high temperature causes the negative graphite electrode to be easily over 400 ℃ due to the influence of conduction heat and self joule heat, thereby causing the portion protruding from the furnace body to be oxidized.

Therefore, the graphite electrode extending out of the furnace body needs to be sprayed and cooled to reduce the temperature of the graphite electrode and the oxidation degree. However, in the cooling process, the graphite electrode is made of a porous material, and the sprayed cooling medium is easily sucked through a siphon principle, so that the cooling medium permeates into the graphite electrode, and the graphite electrode is etched (the sucked cooling medium can be understood to react with the graphite electrode), so that the service life of the graphite electrode is greatly reduced.

Based on this, in order to achieve effective cooling and improve the service life of the graphite electrode, referring to fig. 1, the present utility model proposes a graphitizing furnace 100, wherein a portion of the graphite electrode extending out of the furnace body 20 is protected with a protecting structure 10, and a heat conduction design is performed between the protecting structure 10 and the graphite electrode. Thus, when the graphite electrode can be in spray cooling, heat on the graphite electrode is exchanged with the cooling medium through the protective structure 10, so that the surface temperature of the graphite electrode is reduced. Because the protection structure 10 forms physical protection to the graphite electrode which stretches out of the furnace body 20, if the graphite electrode is in the process of spraying and cooling, the graphite electrode can not directly contact with the cooling medium to cause the cooling medium to permeate into the part of the graphite electrode in the furnace body 20, so that the etching probability of the graphite electrode in the process of spraying and cooling is reduced. So design, utilize protective structure 10 can promote graphite electrode's life when being convenient for realize effectively cooling.

Referring to fig. 1, according to some embodiments of the present utility model, there is provided a graphitization furnace 100, the graphitization furnace 100 including: furnace body 20, electrode 30 and protective structure 10. The electrode 30 extends from the inside of the furnace body 20 to the outside of the furnace body 20. Wherein, the protective structure 10 is at least partially arranged on the part of the electrode 30 extending out of the furnace body 20 and is in heat conduction fit with the electrode 30.

Furnace body 20 refers to the main body equipment of graphitizing furnace 100, and has a structure with a chamber 40 for material reaction inside, and the shape of furnace body 20 has various designs, such as: may be, but is not limited to, a cylinder, a prism, etc.

Electrode 30 refers to a device capable of heating the material in furnace body 20, and the heating mode may be an electric heating mode, for example, electrode 30 may be, but is not limited to, a graphite electrode, etc.

The protection structure 10 is a structure capable of forming physical protection for the electrode 30 so that the cooling medium does not directly contact with the electrode 30, and the material design thereof should have certain waterproof and heat conducting functions; of course, the material of the protective structure 10 should also have a certain flexibility and ductility, such as: the material of the protective structure 10 may be, but not limited to, aluminum, tin, copper, etc. Meanwhile, the protection structure 10 can protect the electrode 30 in various manners, for example: cladding, shielding, etc. Of course, attention should be paid to the heat conduction requirement between the guard structure 10 and the electrode 30 while the guard is achieved. The cooling medium refers to a cooling substance used in the cooling process of the electrode 30, and may be cooling water, other cooling solvents, or the like.

The heat conductive engagement between the guard structure 10 and the electrode 30 is understood to be the heat conduction between the guard structure 10 and the electrode 30. When the electrode 30 is in spray cooling, heat on the electrode 30 is transferred to the protective structure 10, and then the protective structure 10 exchanges heat with the cooling medium to realize cooling effect. The heat conductive engagement between the guard structure 10 and the electrode 30 can be achieved in a variety of ways, such as: coating the electrode 30 with the protective structure 10 in a fitting manner; or a thermally conductive substance or the like is filled between the shielding structure 10 and the electrode 30.

Because the protection structure 10 can form physical protection to the electrode 30, if the electrode 30 is in the process of spraying and cooling, the electrode 30 can not be directly contacted with the cooling medium, so that the cooling medium permeates to the part of the electrode 30 in the furnace body 20, and the etching probability of the electrode 30 in the process of spraying and cooling is reduced. So designed, the use of the protective structure 10 can facilitate effective cooling while improving the service life of the electrode 30.

Optionally, referring to fig. 2, the protection structure 10 includes a heat conducting member 11, and the heat conducting member 11 is coated on a portion of the electrode 30 extending out of the furnace body 20 according to some embodiments of the present utility model.

The heat conductive member 11 is a structure that can be coated on the electrode 30 and can transfer heat from the electrode 30, for example: it may be a thin metal layer, and may be, but is not limited to, tinfoil, aluminum foil, copper foil, etc. Meanwhile, when the electrode 30 is coated by the heat conducting piece 11, the part of the electrode 30 extending out of the furnace body 20 can be completely coated; a portion of it may also be coated, for example: the heat conductive member 11 may cover the electrode 30 at a position where the cooling medium can act.

In particular, in some embodiments, a portion of the heat conducting member 11 is attached to one end of the electrode 30, and the remaining portion of the heat conducting member 11 is folded along the edge of the end of the electrode 30 and wrapped around the circumferential side of the electrode 30. Among them, the shape of the electrode 30 has various designs, such as: the electrode 30 may be designed as, but is not limited to, a cylinder, a quadrangular prism, a pentagonal prism, etc. When the electrode 30 is configured into a quadrangular prism structure, the heat conducting member 11 is coated on five sides of the electrode 30 extending out of the furnace body 20.

The heat conducting piece 11 is coated on the part of the electrode 30 extending out of the furnace body 20, so that not only is the conduction temperature of the electrode 30 reduced, but also the electrode 30 is protected, the etching probability of the electrode 30 is reduced, and the service life of the electrode 30 is prolonged.

Optionally, referring to fig. 3, the thickness of the heat conducting member 11 is denoted as h, where h satisfies the following conditions: h is more than or equal to 8 mu m and less than or equal to 10mm.

The thickness design of the heat conducting member 11 may affect the temperature reduction and protection of the electrode 30, for example: if the thickness of the heat conducting member 11 is too small, the heat transfer performance of the heat conducting member 11 to the electrode 30 can be increased, but the structural strength of the heat conducting member 11 is greatly weakened, so that the heat conducting member 11 is easily damaged, and the protection performance to the electrode 30 is reduced; if the thickness of the heat conductive member 11 is too large, the heat transfer performance of the heat conductive member 11 is impaired although the structural strength can be improved.

The thickness h of the heat conductive member 11 is the average thickness of the heat conductive member 11, and of course, for a material having a uniform thickness, a thickness at any position may be taken as the thickness of the heat conductive member 11. For non-uniform thickness materials, measurements can be taken at different locations and the thickness data obtained averaged. In addition, in calculating the thickness data of the heat conductive member 11, the acquired data can be reasonably optimized, such as: when the thickness at different positions is obtained, if the thickness value at the local position is found to be larger than that of other data, the data can be removed from the data with larger difference and then averaged in order to enable the data to be more consistent, so that the reliability of the data is improved.

For this reason, the thickness of the heat conductive member 11 is controlled to be 8 μm to 10mm to achieve both the cooling effect and the protection effect of the electrode 30.

According to some embodiments of the utility model, optionally, h further satisfies the condition of: h is more than or equal to 20 mu m and less than or equal to 2mm.

The thickness h of the heat conductive member 11 may be any value between 20 μm and 2mm, for example: the thickness h of the heat conductive member 11 may be, but is not limited to, 20 μm or 2mm.

The thickness of the heat conductive member 11 is controlled to be 20 μm to 2mm, so that the cooling effect and the protection effect of the counter electrode 30 can be further improved.

According to some embodiments of the present utility model, optionally, the heat conduction coefficient of the heat conduction member 11 is denoted as λ, where λ satisfies the condition that: lambda is more than or equal to 50W/(m.K) and less than or equal to 400W/(m.K).

The thermal conductivity of the heat conducting member 11 is an indication of the heat conducting capacity of the counter electrode 30, and the greater the thermal conductivity is, the better the cooling effect of the counter electrode 30 is. However, considering the thermal conductivity of the current materials, the thermal conductivity of the present embodiment can be controlled between 50W/(mK) and 400W/(mK). Of course, in other embodiments, the thermal conductivity of the thermal conductive member 11 may be 300W/(mK) to 400W/(mK).

The heat conductivity of the heat conducting member 11 is reasonably controlled between 50W/(m.K) and 400W/(m.K), and the heat conduction on the electrode 30 is improved, so that the cooling effect of the electrode 30 is improved.

Optionally, referring to fig. 4, the guard structure 10 further includes a seal 12, according to some embodiments of the present utility model. The sealing member 12 is hermetically provided between the heat conductive member 11 and the furnace body 20.

When the electrode 30 extends out of the furnace body 20, a boundary exists between the electrode and the furnace body 20. When the electrode 30 is in the process of spray cooling, the cooling medium can permeate into the furnace body 20 through the junction, thereby affecting the quality of the graphite product. For this purpose, a sealing member 12 is provided between the heat conducting member 11 and the furnace body 20, so that the heat conducting member 11 is connected to the furnace body 20 through the sealing member 12, and the heat conducting member 11 completely covers the portion of the electrode 30 protruding from the electrode 30 on the furnace body 20.

The sealing element 12 can be designed into a packing structure or a rubber strip structure; of course, it may also be a sealant. When the sealing member 12 is a sealant, one end of the heat conducting member 11 may be extended onto the furnace body 20 along the length direction of the electrode 30; and then the edge of the heat conducting member 11 is sealed and adhered to the furnace body 20 by using sealant.

The heat conducting member 11 and the furnace body 20 are connected in a sealing way by the sealing member 12, so that the extending part of the electrode 30 is completely covered, and the possibility that a cooling medium enters the furnace body 20 along the length direction of the electrode 30 is reduced.

Optionally, referring to fig. 4, according to some embodiments of the present utility model, a boss 21 is provided on the furnace body 20 around the outer circumference of the electrode 30. A portion of the heat conductive member 11 extends between the boss 21 and the electrode 30, and the sealing member 12 is at least partially interposed between the boss 21 and the heat conductive member 11.

The boss 21 is an annular structure on the furnace body 20 around the outer periphery of the electrode 30, and a gap for the sealing member 12 to be partially inserted is formed between the boss and the heat conducting member 11 on the electrode 30. When a part of the sealing member 12 is inserted between the protruding portion 21 and the heat conducting member 11, not only the gap at the junction between the electrode 30 and the furnace body 20 can be closed; but also by the abutting action of the sealing member 12, the heat conducting member 11 is compacted on the electrode 30. Wherein, in order to achieve an effective plug-in seal, the gap between the boss 21 and the heat conducting member 11 should be smaller than the thickness of at least part of the structure on the sealing member 12.

The protruding portion 21 may be disposed on the furnace body 20 in a combined manner, for example: bolting, bonding, riveting, welding, etc.; the method can also be an integral molding method, such as: masonry, pouring, etc.

The sealing element 12 is plugged between the protruding part 21 and the heat conducting element 11, so that a gap at the junction between the electrode 30 and the furnace body 20 can be effectively closed, and the possibility that a cooling medium enters the furnace body 20 is reduced; but also can lead the heat conducting piece 11 to be pressed on the electrode 30, thereby improving the cooling effect and the protection effect of the electrode 30.

Optionally, referring to fig. 4, according to some embodiments of the present utility model, an end of the sealing member 12 inserted between the protruding portion 21 and the heat conducting member 11 is spaced apart from the furnace body 20, and forms a closed chamber 40 with the protruding portion 21 and the electrode 30.

When the sealing member 12 is inserted between the boss 21 and the electrode 30, one end thereof may abut against the furnace body 20 or may be spaced from the furnace body 20. When the sealing element 12 is plugged into one end between the protruding part 21 and the electrode 30 and the furnace body 20 are kept at a distance, a closed cavity 40 is formed by enclosing the sealing element 12, the protruding part 21 and the electrode 30, and the cavity 40 can play a role of isolation and sealing.

To further reduce the oxidation level of electrode 30, an inert or chemically inert gas may be injected into chamber 40, such as: carbon dioxide, nitrogen, argon, and the like. This reduces contact of oxygen or air with the electrode 30 and reduces the degree of oxidation of the electrode 30.

The sealing element 12 is used for enclosing between the protruding part 21 and the electrode 30 to form a cavity 40, so that the cooling medium and the external air are isolated, the protection effect of the electrode 30 is further improved, and the service life of the electrode 30 is further prolonged.

Optionally, referring to fig. 4, the sealing member 12 includes an insertion portion 121 and a limiting portion 122 connected to the insertion portion 121 according to some embodiments of the present utility model. The insertion portion 121 is inserted between the protruding portion 21 and the heat conductive member 11, and the stopper 122 abuts against an end of the protruding portion 21 facing away from the furnace body 20.

The insertion portion 121 is a member that can be inserted between the protruding portion 21 and the heat conductive member 11, and serves to close the gap between the protruding portion 21 and the heat conductive member 11, and may be designed in a ring-shaped structure to fit around the outside of the electrode 30. To enable the insertion portion 121 to be inserted between the protruding portion 21 and the heat conductive member 11, an elastic material may be selected as a preparation material of the insertion portion 121, for example: rubber, and the like. Of course, a compacted material, such as ceramic fiber wool, may be disposed between the insertion portion 121 and the heat conductive member 11.

The stopper 122 is a member that serves as a stopper in the process of the insertion portion 121 between the boss 21 and the heat conductive member 11, so as to restrict the excessive insertion of the insertion portion 121. To facilitate insertion and retention of the seal 12, the retention portion 122 may be configured to extend as a protrusion on the insertion portion 121 along a side facing away from the insertion portion 121, i.e., may form or approximate an "L" shape.

When the stopper 122 abuts against one end of the boss 21, one end of the stopper 122 away from the insertion portion 121 may be provided so as not to protrude from the boss 21 or may be flush with the boss 21 in the height direction X of the furnace body 20; of course, the protruding boss 21 may also be provided. When the protruding boss 21 is disposed at one end of the limiting portion 122, the sealing member 12 can be conveniently pulled out between the boss 21 and the heat conducting member 11 by operating the protruding portion of the limiting portion 122.

Alternatively, the connection between the limiting portion 122 and the inserting portion 121 may be a combination installation manner or an integral molding manner. The integral molding mode can be injection molding, extrusion, cutting and the like, but is not limited to the mode.

The insertion degree of the insertion part 121 is effectively controlled by the abutting limit of the limit part 122 and one end of the bulge part 21, so that the consistency of the installation of the sealing element 12 is convenient to maintain.

According to some embodiments of the utility model, the seal 12 is optionally at least partially configured as an insulating structure to block electrical conduction between the boss 21 and the electrode 30.

The insulating structure refers to a structure capable of isolating the conduction of a circuit, and materials thereof have various choices, such as: the material of the insulating structure can be rubber, or can be connected with insulating plastics such as polyethylene, polypropylene, polystyrene and the like. The sealing member 12 may be partially or entirely configured as an insulating structure. When the portion of the seal member 12 is configured as an insulating structure, the insulating structure may be a portion of the seal member 12 that contacts the boss 21; the portion of the sealing member 12 that contacts the heat conductive member 11 may be, of course, an intermediate structure portion of the sealing member 12.

The seal 12 may be designed as a unitary structure or as a split structure. When the seal 12 is of unitary construction, the insulating structure on the seal 12 may be molded by injection molding, spraying, bonding, or the like. When the sealing member 12 is of a split type structure, the respective partial structures may be sequentially stacked, and at least a part of the structures may be of an insulating structure, such as: insulating plates, etc.

At least a part of the sealing member 12 is designed to be of an insulating structure, so that insulation is kept between the protruding part 21 and the electrode 30, and the risk of conducting electricity to the furnace body 20 due to the fact that the electrode 30 needs to be electrified is reduced.

Optionally, referring to fig. 3, a distance between an end surface of the sealing member 12 facing away from the furnace body 20 and the furnace body 20 is denoted as H1, and a length of the electrode 30 extending out of the furnace body 20 is denoted as H2, where H1 < H2.

H1 < H2, which means that the seal 12 does not completely cover the portion of the electrode 30 extending beyond the seal 12 when sealing between the counter electrode 30 and the furnace body 20, i.e., a portion of the electrode 30 is configured to extend beyond the seal 12.

The length of the control electrode 30 extending out of the furnace body 20 is greater than the distance between one end face of the sealing element 12 and the furnace body 20, so that a part of the electrode 30 also extends out of the sealing element 12, and at least a part of the electrode 30 is exposed for cooling.

In some embodiments, the ratio between H2 and H1 satisfies the condition: H2/H1 is more than or equal to 3 and less than or equal to 15.

The ratio between H2 and H1 can be any value between 3 and 15, when the ratio between H2 and H1 is larger, the electrode 30 extends out of the sealing element 12 more, the part of the sealing element 12 acting on the electrode 30 is smaller, the cooling effect is better, and the sealing effect of the sealing element 12 on the electrode 30 and the furnace body 20 is affected; when the ratio between H2 and H1 is smaller, it is explained that the electrode 30 protrudes less out of the sealing member 12, i.e., the portion of the electrode 30 covered by the sealing member 12 is more, resulting in a deterioration of the cooling effect of the electrode 30. Therefore, the ratio of H2 to H1 is reasonably controlled between 3 and 15. Of course, in other embodiments, the ratio between H2 and H1 may be 4-10.

The ratio of H2 to H1 is reasonably controlled between 3 and 15, and the sealing effect and the cooling effect can be effectively considered.

Optionally, referring to fig. 4, the protective structure 10 further includes a heat transfer agent 13 according to some embodiments of the present utility model. The heat conductive agent 13 is filled between the heat conductive member 11 and the electrode 30.

The heat conductive agent 13 is a substance having heat conductive property and having a certain filling ability, such as: which may be, but is not limited to, a thermally conductive cement, a thermally conductive silicone grease, and the like. The heat-conducting adhesive cement is a substance with high heat conductivity coefficient, such as dimethyl silicone oil, heat-conducting adhesive and the like.

The gap between the heat conducting member 11 and the electrode 30 is filled with the heat conducting agent 13, so that the heat conducting area is increased, and the heat conducting efficiency is improved.

According to some embodiments of the present utility model, optionally, the protection structure 10 further includes a heat dissipation portion 14, where the heat dissipation portion 14 is protruding from the heat conducting member 11.

The heat dissipation portion 14 is a protruding structure on the heat conduction member 11, and can increase the heat dissipation area of the surface of the heat conduction member 11. The shape of the heat sink 14 may have various designs, such as: can be designed as a sheet-like structure, such as the heat sink 14 extending along the length of the electrode 30; and can also be designed into convex hull structures and the like.

The heat dissipation part 14 is arranged on the heat conduction member 11, so that the heat dissipation area is increased, the heat conduction efficiency is improved, and the cooling effect of the electrode 30 is improved.

Optionally, referring to fig. 2, the heat dissipation parts 14 are plural, and at least part of the heat dissipation parts 14 are arranged in parallel and at intervals on the heat conducting member 11.

The heat dissipation portion 14 is arranged on the heat conduction member 11 in various ways, such as: all the heat dissipation parts 14 are distributed at intervals along a certain direction; alternatively, some of the heat dissipation portions 14 may be spaced apart in a certain direction, and another of the heat dissipation portions 14 may be spaced apart in a direction intersecting the certain direction, or the like.

The plurality of heat dissipation parts 14 are arranged on the heat conduction member 11 at intervals, so that the heat dissipation area can be further increased, and the heat conduction efficiency can be improved.

According to some embodiments of the present utility model, there is provided a battery production system including the graphitization furnace 100 of any of the above.

Referring to fig. 1 to 4, according to some embodiments of the present utility model, a graphitizing furnace 100 is provided, the electrode 30 is a graphite electrode, and the heat conducting member 11 is a thin metal layer. The metal thin layer is flexible and has certain extension, the thickness of the metal thin layer is controlled to be 8 mu m-10 mm, and the heat conductivity coefficient is controlled to be 100W/(m.K) -400W/(m.K). The root of the graphite electrode is provided with a sealing element 12 with a packing structure, so that the possibility that a cooling medium enters the furnace body 20 along the graphite electrode is reduced. The metal thin layer and the sealing piece 12 are connected and compacted by ceramic fiber cotton, and heat conduction cement is filled between the metal thin layer and the graphite electrode, so that gaps between the metal thin layer and the graphite electrode are reduced, and heat conduction performance is improved.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (16)

1. A graphitization furnace, the graphitization furnace comprising:

a furnace body (20);

an electrode (30), wherein the electrode (30) extends out of the furnace body (20) from the inside of the furnace body (20);

the graphitizing furnace further comprises a protection structure (10), wherein the protection structure (10) is at least partially arranged on the part of the electrode (30) extending out of the furnace body (20) and is in heat conduction fit with the electrode (30).

2. Graphitization furnace according to claim 1, characterized in that the protective structure (10) comprises a heat conducting member (11), the heat conducting member (11) being wrapped around the portion of the electrode (30) protruding outside the furnace body (20).

3. Graphitization furnace according to claim 2, characterized in that the thickness of the heat conducting member (11) is denoted as h, wherein h fulfils the condition: h is more than or equal to 8 mu m and less than or equal to 10mm.

4. A graphitization furnace according to claim 3, wherein h also satisfies the condition of: h is more than or equal to 20 mu m and less than or equal to 2mm.

5. Graphitization furnace according to claim 2, characterized in that the heat conduction coefficient of the heat conducting member (11) is denoted as λ, wherein λ fulfils the condition: lambda is more than or equal to 50W/(m.K) and less than or equal to 400W/(m.K).

6. Graphitization furnace according to claim 2, characterized in that the shielding structure (10) further comprises a sealing member (12), the sealing member (12) being sealingly arranged between the heat conducting member (11) and the furnace body (20).

7. Graphitization furnace according to claim 6, characterized in that the furnace body (20) is provided with a protrusion (21) arranged around the periphery of the electrode (30), a part of the heat conducting member (11) extends between the protrusion (21) and the electrode (30), and the sealing member (12) is at least partially inserted between the protrusion (21) and the heat conducting member (11).

8. Graphitization furnace according to claim 7, characterized in that the sealing member (12) is inserted into one end between the boss (21) and the heat conducting member (11) and is arranged spaced apart from the furnace body (20) and forms a closed chamber (40) with the boss (21) and the electrode (30).

9. The graphitizing furnace according to claim 7, wherein the sealing member (12) includes a caulking portion (121) and a stopper portion (122) connected to the caulking portion (121), the caulking portion (121) is interposed between the boss portion (21) and the heat conductive member (11), and the stopper portion (122) abuts against an end of the boss portion (21) facing away from the furnace body (20).

10. Graphitization furnace according to claim 7, characterized in that the seal (12) is at least partially configured as an insulating structure to block the electrical conduction between the boss (21) and the electrode (30).

11. Graphitization furnace according to any of claims 6-10, characterized in that the distance between the end of the seal (12) facing away from the furnace body (20) and the furnace body (20) is denoted H1, and the length of the electrode (30) extending outside the furnace body (20) is denoted H2, wherein H1 < H2.

12. The graphitization furnace of claim 11, wherein the ratio between H2 and H1 satisfies the condition of: H2/H1 is more than or equal to 3 and less than or equal to 15.

13. Graphitization furnace according to claim 2, characterized in that the shielding structure (10) further comprises a heat conducting agent (13), the heat conducting agent (13) being filled between the heat conducting member (11) and the electrode (30).

14. Graphitization furnace according to any of claims 2-10, characterized in that the shielding structure (10) further comprises a heat sink (14), which heat sink (14) is protruding from the heat conducting member (11).

15. The graphitizing furnace according to claim 14, wherein the heat dissipating portions (14) are plural, and at least a part of the heat dissipating portions (14) are juxtaposed and spaced apart on the heat conductive member (11).

16. A battery production system comprising the graphitization furnace of any one of claims 1-15.