Graphitization furnace, control method thereof and battery production system

Abstract

The embodiment of the invention provides a graphitization furnace, a control method thereof and a battery production system. The performance of the graphitization furnace can be improved. Specifically, the graphitization furnace comprises: a furnace body, in which a material channel is arranged; at least part of the electrode is located in the material channel; the clamping device is used for clamping the electrode; and the lifting device is connected with the clamping device, the lifting device is used for moving the electrode in the first direction, and the first direction is parallel to the axis of the material channel.

Description

Graphitization furnace and control method thereof, and battery production system Technical Field

[0001] The embodiments of the present application relate to the field of mechanical engineering technology, and more specifically, to a graphitization furnace and a control method thereof, and a battery production system. Background Art

[0002] With the rapid development of new energy technologies, power batteries have been widely used in many fields due to their high energy density and recyclability, becoming an indispensable part of human life. Currently, carbon materials are widely used in the negative electrode materials of power batteries. Among them, graphitized carbon materials (also referred to as graphite materials) have been widely commercialized due to their long service life, stable structure, and low cost. In addition, the excellent properties of graphite materials have also led to their widespread application in many fields.

[0003] A graphitization furnace is a device that can generate graphite materials. Its performance is extremely important for the production of graphite materials and batteries. In view of this, how to improve the performance of the graphitization furnace is a technical problem that needs to be solved urgently.

[0004] Summary of the Invention

[0005] The embodiments of the present application provide a graphitization furnace and a control method thereof, and a battery production system, which can improve the performance of the graphitization furnace.

[0006] In a first aspect, a graphitization furnace is provided, comprising: a furnace body, wherein a material channel is provided in the furnace body; an electrode, wherein at least a portion of the electrode is located in the material channel; a clamping device, wherein the clamping device is used to clamp the electrode; and a lifting device, wherein the lifting device is connected to the clamping device and is used to move the electrode along a first direction parallel to the axis of the material channel.

[0007] In an embodiment of the present application, a clamping device is provided in the graphitization furnace to clamp the electrode and is connected to the lifting device, so that when the clamping device moves with the movement of the lifting device, the electrode can be driven to move with the movement of the lifting device, thereby realizing the movement of the electrode in a direction parallel to the axis of the material channel, so that the electrode moves in a fixed direction, thereby improving the accuracy of the moving electrode, reducing the probability of electrode breakage, and reducing the damage caused by the moving electrode to the inside of the furnace body of the graphitization furnace, thereby improving the performance of the graphitization furnace.

[0008] In some embodiments, the clamping device includes a first brake, which surrounds the electrode and is used to clamp or release the electrode, and the first brake is connected to the lifting device.

[0009] In an embodiment of the present application, a clamping device is provided including a first brake surrounding the electrode to achieve clamping or loosening of the electrode, so that when the first brake clamps the electrode, the electrode is in a stationary state relative to the first brake, and when the first brake loosens the electrode, the electrode can move within the surrounding area of ​​the first brake relative to the first brake, thereby achieving control of the electrode movement accuracy through the first brake, reducing the probability of electrode breakage, and reducing the damage caused by the moving electrode to the interior of the graphitization furnace, thereby improving the performance of the graphitization furnace.

[0010] In some embodiments, the first brake includes a first pressure ring, a first pressure cylinder and a conductive chuck; the first pressure cylinder is arranged in the first pressure ring, the conductive chuck is arranged on the side of the first pressure cylinder close to the electrode, and the first pressure cylinder is configured to drive the conductive chuck to abut against or detach from the electrode.

[0011] In an embodiment of the present application, a first brake is provided including a first pressure ring, a first pressure cylinder, and a conductive chuck, so that the annular structure of the first pressure ring can surround the electrode. When the first pressure cylinder is provided inside the first pressure ring, the first pressure cylinder can, under the fixed support of the first pressure ring, more accurately approach and move away from the surface of the electrode. When the first pressure cylinder drives the conductive chuck to abut or disengage from the electrode, the conductive chuck can achieve the operation of clamping and loosening the electrode. At the same time, since the conductive chuck can energize the electrode, when the conductive chuck can clamp the electrode, the contact with the electrode is relatively close, which increases the probability of the conductive chuck being in full contact with the electrode and reduces the damage to the conductive chuck caused by arcing due to incomplete contact between the conductive chuck and the electrode. Thus, the first brake can achieve precise control of the electrode, and improve the service life of the conductive chuck and the stability of the electrode energization.

[0012] In some embodiments, the first pressure cylinder is provided with a first elastic member, and the first pressure cylinder is configured to drive the conductive clamp to abut against or separate from the electrode through the first elastic member.

[0013] In the embodiment of the present application, a first elastic member is provided in the first pressure cylinder, and the conductive chuck is driven to abut against or detach from the electrode by the first elastic member, that is, the driving of the conductive chuck is achieved by the elastic deformation of the first elastic member. The force generated by the elastic deformation is easy to control, thereby making the driving of the conductive chuck more precise, and can improve the accuracy of the first brake's control over the electrode, thereby improving the performance of the graphitization furnace.

[0014] In some embodiments, the graphitization furnace further includes a first hydraulic system, and the first hydraulic system is used to provide hydraulic power for the elastic deformation of the first elastic member.

[0015] In the embodiment of the present application, hydraulic power is provided to the first elastic member by the first hydraulic system. The provided power is easy to adjust, thereby improving the performance of the graphitization furnace.

[0016] In some embodiments, the clamping device includes a cooling component and a conductive clamp, wherein the conductive clamp is connected to the cooling component and contacts the electrode.

[0017] In the embodiment of the present application, by connecting the conductive chuck to the cooling component, the electrode can be cooled while the conductive chuck is cooled, which is beneficial to protecting the conductive chuck and reducing the probability of electrode oxidation at high temperature, thereby improving the performance of the graphitization furnace.

[0018] In some embodiments, the conductive clamp is provided with a guide groove, and the cooling component is provided in the guide groove.

[0019] In the embodiment of the present application, a cooling component is provided in the guide groove of the conductive chuck, and the connection between the cooling component and the conductive chuck is stable, so that the electrode can be cooled while the conductive chuck is cooled, which is beneficial to the protection of the conductive chuck and reduces the probability of oxidation of the electrode at high temperature, thereby improving the performance of the graphitization furnace.

[0020] In some embodiments, the cooling component includes a flow channel containing a fluid.

[0021] In the embodiment of the present application, the cooling function is achieved by a flow channel containing a fluid, which is easy to implement and maintain, thereby improving the production efficiency of the graphitization furnace.

[0022] In some embodiments, the ratio of the contact area between the conductive clamp and the electrode to the area of ​​the first surface of the electrode is 1 / 3 to 1, optionally 1 / 2 to 9 / 10.

[0023] In the embodiment of the present application, by setting the ratio of the contact area between the conductive chuck and the electrode to the area of ​​the first surface of the electrode within a certain range, the probability of contact between the conductive chuck and the electrode can be increased, thereby improving the stability of the electrode power supply and further improving the performance of the graphitization furnace.

[0024] In some embodiments, the clamping device further includes a second brake, which surrounds the electrode and is used to clamp or release the electrode.

[0025] In an embodiment of the present application, a clamping device including a second brake surrounding the electrode is provided to achieve clamping or loosening of the electrode, so that when the second brake clamps the electrode, the electrode is in a stationary state relative to the second brake, and when the second brake loosens the electrode, the electrode can move relative to the second brake within the surrounding area of ​​the second brake, thereby achieving control of the electrode movement accuracy through the second brake, reducing the probability of electrode breakage, and reducing the damage caused by the moving electrode to the interior of the graphitization furnace, thereby improving the performance of the graphitization furnace.

[0026] In some embodiments, the second holding brake includes a second pressure ring and a second pressure cylinder; the second pressure cylinder is disposed in the second pressure ring, and the second pressure cylinder is configured to abut against or disengage from the surface of the electrode to clamp or release the electrode.

[0027] In this embodiment of the present application, the second holding brake comprises a second pressure ring and a second pressure cylinder, enabling the second pressure ring's annular structure to surround the electrode. When the second pressure cylinder is positioned within the second pressure ring, the second pressure cylinder, supported by the second pressure ring, can precisely approach and move away from the electrode surface. This second holding brake enables precise control of the electrode, improving the performance of the graphitization furnace.

[0028] In some embodiments, the second pressure cylinder is provided with a second elastic member, and the second pressure cylinder is configured to abut against or detach from the electrode through the second elastic member.

[0029] In the embodiment of the present application, a second elastic member is provided in the second pressure cylinder, and the second elastic member is used to drive the second pressure cylinder to abut against or separate from the electrode. That is, the second pressure cylinder is driven by the elastic deformation of the second elastic member. The force generated by the elastic deformation is easy to control, thereby making the driving of the second pressure cylinder more precise, and can improve the accuracy of the second brake's control over the electrode, thereby improving the performance of the graphitization furnace.

[0030] In some embodiments, the graphitization furnace further includes a second hydraulic system, and the second hydraulic system is used to provide hydraulic power for the elastic deformation of the second elastic member.

[0031] In the embodiment of the present application, the second hydraulic system provides hydraulic power to the second elastic member, and the provided power is easy to adjust, thereby improving the performance of the graphitization furnace.

[0032] In some embodiments, the first holding brake and the second holding brake both include a third pressure ring and a third pressure cylinder; the third pressure cylinder is disposed in the third pressure ring, and the third pressure cylinder is configured to abut against or separate from the electrode.

[0033] In the embodiment of the present application, by providing a first brake and a second brake with the same structure, the control method of the same brake is the same, which is easy to implement and operate, thereby improving the performance of the graphitization furnace.

[0034] In some embodiments, the third pressure cylinder is provided with a third elastic member, and the third pressure cylinder is configured to abut against or detach from the electrode through the third elastic member.

[0035] In the embodiment of the present application, a third elastic member is provided in the third pressure cylinder, and the third pressure cylinder is driven to abut against or separate from the electrode by the third elastic member, that is, the driving of the third pressure cylinder is achieved by the elastic deformation of the third elastic member. The force generated by the elastic deformation is easy to control, thereby making the driving of the third pressure cylinder more precise, and can improve the accuracy of the control of the electrode by the first brake and the second brake, thereby improving the performance of the graphitization furnace.

[0036] In some embodiments, the graphitization furnace further includes a third hydraulic system, and the third hydraulic system is used to provide hydraulic power for the elastic deformation of the third elastic member.

[0037] In the embodiment of the present application, hydraulic power is provided to the third elastic member by the third hydraulic system. The provided power is easy to adjust, thereby improving the performance of the graphitization furnace.

[0038] In some embodiments, a distance between the first holding brake and the second holding brake is greater than 300 mm.

[0039] In the embodiment of the present application, by setting the distance between the first brake and the second brake, a certain distance is provided for the movement of the brake, which facilitates the brake to drive the electrode to move, thereby improving the performance of the graphitization furnace.

[0040] In some embodiments, the lifting device includes a lifting cylinder, and the graphitization furnace further includes a fourth hydraulic system, wherein the fourth hydraulic system is configured to provide hydraulic power to the lifting cylinder so that the lifting cylinder moves the electrode.

[0041] In the embodiment of the present application, the lifting cylinder provides the electrode with power to move in a fixed direction, so that the electrode can move in a fixed direction, thereby reducing the damage caused by the moving electrode to the inside of the graphitization furnace and improving the performance of the graphitization furnace.

[0042] In a second aspect, a battery production system is provided, comprising the graphitization furnace according to the first aspect or any embodiment of the first aspect, wherein the graphitization furnace is used to produce negative electrode graphite material for the battery.

[0043] In a third aspect, a control method for a graphitization furnace is provided, wherein the graphitization furnace includes: a furnace body, an electrode, a clamping device and a lifting device, a material channel is provided in the furnace body, at least a portion of the electrode is located in the material channel, the clamping device is used to clamp the electrode, and the lifting device is connected to the clamping device; the control method includes: controlling the lifting device to drive the clamping device to move the electrode along a first direction, wherein the first direction is parallel to the axis of the material channel.

[0044] In an embodiment of the present application, a clamping device is provided to clamp the electrode and is connected to a lifting device, and then the lifting device is controlled to drive the clamping device to move the electrode along a first direction, thereby achieving movement of the electrode in a direction parallel to the axis of the material channel, so that the electrode moves in a fixed direction, thereby improving the accuracy of the moving electrode, reducing the probability of electrode breakage, and reducing damage to the interior of the graphitization furnace caused by the moving electrode, thereby improving the performance of the graphitization furnace.

[0045] In some embodiments, the clamping device includes a first brake, which surrounds the electrode and is used to clamp or release the electrode, and the first brake is connected to the lifting device; the control method includes: controlling the first brake to release the electrode; controlling the lifting device to drive the first brake to move in a second direction, which is opposite to the first direction; controlling the first brake to clamp the electrode; and controlling the lifting device to drive the first brake and the electrode to move in the first direction.

[0046] In the embodiment of the present application, the movement of the electrode in the first direction is achieved by the first brake, which can better control the movement of the electrode and make the electrode move in a fixed direction, thereby improving the accuracy of the moving electrode, reducing the probability of electrode breakage, and reducing the damage caused by the moving electrode to the interior of the graphitization furnace, thereby improving the performance of the graphitization furnace.

[0047] In some embodiments, the clamping device also includes a second brake, which surrounds the electrode and is used to clamp or release the electrode; the control method includes: controlling the first brake to release the electrode, and controlling the second brake to clamp the electrode; controlling the lifting device to drive the first brake to move toward the second direction; controlling the first brake to clamp the electrode, and controlling the second brake to release the electrode; controlling the lifting device to drive the first brake and the electrode to move toward the first direction.

[0048] In the embodiment of the present application, the movement of the electrode into the interior of the furnace body is achieved through the cooperation of the first brake and the second brake. When the first brake releases the electrode and moves it, the second brake is in a state of clamping the electrode, so that the electrode is fixed and does not shake. When the first brake clamps the electrode and drives the electrode to move, the electrode is in a stationary state relative to the first brake. Therefore, by using the brake to fix the electrode during its movement into the interior of the furnace body, the damage of the electrode to the graphitization furnace can be reduced, and the performance of the graphitization furnace can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0050] FIG1 is a schematic structural diagram of a graphitization furnace provided in one embodiment of the present application;

[0051] FIG2 is a schematic structural diagram of another graphitization furnace provided in one embodiment of the present application;

[0052] FIG3 is a schematic structural diagram of another graphitization furnace provided in one embodiment of the present application;

[0053] FIG4 is a front view of an electrode, a clamping device, and a lifting device included in another graphitization furnace provided in one embodiment of the present application;

[0054] FIG5 is a side view of an electrode, a clamping device, and a lifting device included in another graphitization furnace provided in one embodiment of the present application;

[0055] FIG6 is a top view of an electrode, a clamping device, and a lifting device included in another graphitization furnace provided in one embodiment of the present application;

[0056] FIG7 is a perspective view of an electrode, a clamping device, and a lifting device included in another graphitization furnace provided in one embodiment of the present application;

[0057] FIG8 is a schematic structural diagram of a lifting device provided in one embodiment of the present application;

[0058] FIG9 is a flow chart of a method for controlling a graphitization furnace provided in one embodiment of the present application.

[0059] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0060] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present application, but are not intended to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0061] In the description of this application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly perpendicular, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0062] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0063] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0064] The term "and / or" in this application simply describes an association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0065] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0066] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0067] This application relates to a graphitization furnace that, through heating, converts carbon atoms from a chaotic layer structure into an ordered graphite crystal structure, thereby achieving graphitization of non-graphitic carbon. Graphitization is intended to improve the thermal and electrical conductivity of carbon materials, enhance their thermal shock resistance and chemical stability, impart lubricity and wear resistance, increase their purity, reduce their hardness, and facilitate machining.

[0068] Currently, graphitization furnaces are primarily used for high-temperature processing, including the sintering and graphitization of carbon materials, graphitization of polyimide (PI) films, graphitization of thermally conductive materials, sintering of carbon fiber ropes, sintering and graphitizing of carbon fiber filaments, graphite purification, and other materials that can be graphitized in a carbon environment. In some specific applications, graphite treated in a graphitization furnace can be used to form the negative electrode material of batteries. For example, graphite is currently a major negative electrode material in lithium batteries.

[0069] Typically, a vertical graphitization furnace includes a columnar electrode located at the top of the furnace body and an annular electrode located in the lower middle portion of the furnace body. The columnar electrode is placed vertically at the center of the material channel, while the annular electrode is placed horizontally. The columnar electrode can be a graphite electrode. During the use of the vertical graphitization furnace, the lower portion of the columnar electrode located in the material channel may be worn out due to friction, affecting the electric field strength formed between the columnar electrode and the annular electrode, and thus affecting the degree of graphitization of the material. Therefore, after the vertical graphitization furnace has been used for a period of time, the columnar electrode needs to be moved toward the interior of the furnace body, that is, it needs to be moved vertically downward to achieve normal use of the vertical graphitization furnace.

[0070] When moving the columnar electrode into the furnace body of a shaft graphitization furnace, a crane is usually used in conjunction with the columnar electrode. For example, the crane can suspend the columnar electrode so that the columnar electrode moves into the furnace body as the crane moves. However, during the movement of the columnar electrode, due to the instability of the crane (for example, the crane shakes), the columnar electrode can easily cause damage to the interior of the shaft graphitization furnace. Moreover, since the moving speed of the crane is difficult to control, the columnar electrode can also be easily broken.

[0071] In view of this, an embodiment of the present application provides a graphitization furnace, which uses a clamping device to clamp the electrode, and the clamping device is connected to a lifting device, which is used to move the electrode in a direction parallel to the axis of the material channel. When the clamping device clamps the electrode, that is, the electrode is fixed by the clamping device, the clamping device can drive the electrode to move with the movement of the lifting device when it moves with the movement of the lifting device, thereby realizing the movement of the electrode in a direction parallel to the axis of the material channel, so that the electrode moves in a fixed direction, thereby improving the accuracy of the moving electrode, reducing the probability of the electrode breaking, and reducing the probability of the moving electrode causing damage to the interior of the graphitization furnace body, thereby improving the performance of the graphitization furnace.

[0072] In this application, a battery refers to a physical module that includes one or more battery cells to provide electrical energy. A battery generally includes a casing for encapsulating one or more battery cells. Optionally, the battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., which is not limited in the embodiments of the present application. Among them, graphite can be used as the negative electrode active material of the battery cell, and is combined with the positive electrode active material of the battery cell (for example, lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc.) to realize the movement of metal ions to form an electric current.

[0073] Figure 1 shows a front view of a graphitization furnace 100. As shown in Figure 1, the main body of the graphitization furnace 100 is arranged vertically and mainly includes a furnace body 1 and various functional units disposed in the furnace body 1. Specifically, as shown in Figure 1, the graphitization furnace can include a loading unit, a DC power supply unit, and a cooling and discharging unit.

[0074] The loading unit primarily comprises a silo 2 and a feed pipe 3. The silo 2 is positioned above the furnace body 1 and connected to the feed port on the furnace body via the feed pipe 3. Optionally, a material shut-off valve 4 may be provided at the junction of the silo 2 and the feed pipe 3 to control the flow of material within the material channel 12.

[0075] Optionally, the material entering the graphitization furnace 100 is a graphitizable carbonaceous material, such as petroleum coke, coal coke, and asphalt. After entering the graphitization furnace, the material undergoes four stages of preheating, calcination, graphitization, and cooling to complete the graphitization process and obtain a negative electrode material product, and volatile tail gas escapes during the process.

[0076] Optionally, the number of the silos 2 can be 2, 4 or more, and they are evenly distributed above the furnace body 1.

[0077] The DC power supply unit may include a positive electrode 5, a negative electrode 6, and a DC transformer 7. As shown in Figure 1, the positive electrode 5 may extend into the furnace through an opening above the furnace body 1 and be suspended in the material passage 12. The negative electrode 6 may be positioned in the lower middle portion of the furnace body 1. Optionally, there may be at least one pair of negative electrodes 6, each pair evenly spaced 180 degrees apart. Optionally, the negative electrodes 6 may be distributed radially along the material passage 12 at the same height within the furnace body 1.

[0078] The DC transformer 7 supplies power to the furnace body 1, with a controllable power supply between 600 and 1200 kW. The positive and negative electrodes 5 and 6 apply voltage to the material passing between them. DC current flows from the positive electrode of the DC transformer 7 through the material, where it releases Joule heat due to its own resistance, raising the furnace core temperature above 3000°C. This creates a stable temperature field between the positive and negative electrodes 5 and 6. The current flowing through the material then returns from the negative electrode 6 to the negative electrode of the DC transformer 7, completing a current loop.

[0079] Optionally, the DC power supply unit may also include a fixed brake 8, a conductive water-cooled brake 9, a water-cooling cable 10, and a copper busbar 11. The positive electrode 5 is held securely in place directly above the furnace body 1 by the fixed brake. The conductive water-cooled brake 9 is secured below the fixed brake 8 and connects to the positive electrode 5 to conduct current. Circulating water cools the positive electrode 5 and connects to the copper busbar 11 via the water-cooling cable 10. The copper busbar 11 then connects to the positive and negative terminals of the DC transformer 7.

[0080] Alternatively, the positive electrode 5 and the negative electrode 6 may be graphite electrodes.

[0081] The cooling and discharging unit is mainly used to cool the graphitized material. Specifically, as shown in Figure 1, the cooling and discharging unit can include a low-temperature cooling section 13, which can be a water-cooling jacket. The low-temperature cooling section 13 can also be provided with a water inlet 14 and a water outlet 15. The cooling medium can be circulating water.

[0082] Optionally, the graphitization furnace 100 may further include a furnace heating unit (not shown). For example, a furnace cover and a furnace lining. The furnace cover can be placed on the upper portion of the furnace body 1 to provide insulation, while the furnace lining surrounds the inner wall of the furnace body 1 to provide insulation against the high temperature of the furnace core.

[0083] 2 and 3 respectively show a front view and a side view of a graphitization furnace provided in an embodiment of the present application.

[0084] As shown in Figures 2 and 3, the graphitization furnace 200 includes: a furnace body 210, in which a material channel 211 is provided; an electrode 220, at least a portion of which is located in the material channel 211; a clamping device 230, which is used to clamp the electrode 220; and a lifting device 240, which is connected to the clamping device 230 and is used to move the electrode 220 along a first direction x, where the first direction x is parallel to the axis of the material channel 211.

[0085] Specifically, the electrode 220 may be in a prism or cylinder shape, etc., which is not limited in this application. The material of the electrode 220 may be graphite material, so that when the electrode 220 is slowly consumed during the production process of the graphitization furnace 200, the graphite material is doped into the material, thereby reducing the impact of the electrode material on the quality of the product obtained using the graphitization furnace 200.

[0086] In some embodiments, the first direction x being parallel to the axis of the material channel 211 can be replaced by the first direction x being an extension direction of the material channel 211 .

[0087] It is worth noting that the first direction x may overlap with the axis of the material channel 211 or may not overlap with the axis of the material channel 211 , and this application does not limit this.

[0088] In the embodiment of the present application, the polarity of the electrode 220 can be positive or negative, which is not limited in the present application.

[0089] Therefore, by arranging a clamping device 230 in the graphitization furnace 200 to clamp the electrode 220 and connecting it to the lifting device 240, the clamping device 230 can drive the electrode 220 to move along with the movement of the lifting device 240, thereby realizing the movement of the electrode 220 in a direction parallel to the axis of the material channel 211, so that the electrode 220 moves in a fixed direction, thereby improving the accuracy of the moving electrode 220, reducing the probability of the electrode 220 breaking, and reducing the damage caused by the moving electrode 220 to the inside of the furnace body 210 of the graphitization furnace 200, thereby improving the performance of the graphitization furnace 200.

[0090] In an embodiment of the present application, as shown in Figures 2 and 3, the clamping device 230 may include a first brake 231, which surrounds the electrode 220 and is used to clamp or release the electrode 220. The first brake 231 is connected to the lifting device 240.

[0091] Specifically, the clamping device 230 may include a brake, namely a first brake 231, which can clamp or release the electrode 220. When clamping the electrode 220, the first brake 231 can fix the electrode 220. The connection between the first brake 231 and the lifting device 240 can be a detachable connection, such as a threaded connection, or a non-detachable connection, such as a welding connection, which is not limited in this application.

[0092] In some possible embodiments, when the first holding brake 231 releases the electrode 220, the lifting device 240 can drive the first holding brake 231 in a second direction y, which is opposite to the first direction x. Furthermore, when the first holding brake 231 clamps the electrode 220, the lifting device 240 can drive the first holding brake 231 and the electrode 220 in the first direction x. This allows the electrode 220 to move into the furnace body 210. For example, in a vertical graphitization furnace, when the electrode 220 is positioned vertically, the first holding brake 231 can first release the electrode 220, then move upward to a high position on the electrode 220, clamp the electrode 220, and then drive the electrode 220 downward, allowing the electrode 220 to move into the furnace body 210. It should be noted that when the first holding brake 231 releases the electrode 220, the electrode 220 can be suspended by a crane to prevent it from falling into the furnace body due to gravity.

[0093] Optionally, the clamping device 230 may include one or more first brakes 231 , which is not limited in this application.

[0094] Therefore, by providing the clamping device 230 including the first brake 231 surrounding the electrode 220, the electrode 220 can be clamped or released, so that when the first brake 231 clamps the electrode 220, the electrode 220 is in a stationary state relative to the first brake 231, and when the first brake 231 releases the electrode 220, the electrode 220 can move within the surrounding area of ​​the first brake 231 relative to the first brake 231, thereby achieving control of the movement accuracy of the electrode 220 through the first brake 231, reducing the probability of the electrode 220 breaking, and reducing the damage caused by the moving electrode 220 to the inside of the furnace body 210 of the graphitization furnace 200, thereby improving the performance of the graphitization furnace 200.

[0095] The following describes the specific structure of the first brake 231 by way of example, with reference to Figures 4-7 , using the electrode 220 as a cylinder. Figures 4-7 respectively illustrate the front view, side view, top view, and perspective view of the electrode 220, the clamping device 230, and the lifting device 240 included in a graphitization furnace provided in an embodiment of the present application.

[0096] In an embodiment of the present application, as shown in Figures 4-7, the first brake 231 may include a first pressure ring 2311, a first pressure cylinder 2312 and a conductive clamp (not shown in the figure), the first pressure cylinder 2312 is arranged in the first pressure ring 2311, and the conductive clamp is arranged on the side of the first pressure cylinder 2312 close to the electrode 220. The first pressure cylinder 2312 is configured to drive the conductive clamp to abut or detach from the electrode 220.

[0097] Specifically, the first pressure ring 2311 is an annular structure, with a first pressure cylinder 2312 disposed inside. A conductive chuck can be disposed on the side of the first pressure cylinder 2312 near the electrode 220. Driven by the first pressure cylinder 2312, the conductive chuck can abut or disengage from the surface of the electrode 220 to tighten or loosen the electrode 220. In other words, the conductive chuck is disposed between the first pressure cylinder 2312 and the surface of the electrode 220. Furthermore, when the conductive chuck abuts the surface of the electrode 220 and tightens the electrode 220, the conductive chuck can be used to energize the electrode 220, thereby electrically connecting the conductive chuck to the electrode 220.

[0098] Optionally, the conductive clamp can be any conductive structure, for example, the conductive clamp is a copper busbar (or can be called a copper busbar), in which case the copper busbar and the first pressure cylinder 2312 can be connected by bolts, which is not limited in this application.

[0099] Therefore, by configuring the first holding brake 231 to include the first pressure ring 2311, the first pressure cylinder 2312, and the conductive clamp, the annular structure of the first pressure ring 2311 can surround the electrode 220. When the first pressure cylinder 2312 is disposed within the first pressure ring 2311, the first pressure cylinder 2312 can be fixedly supported by the first pressure ring 2311 and can relatively accurately approach and move away from the surface of the electrode 220. When the first pressure cylinder 2312 drives the conductive chuck to contact or detach from the electrode 220, the conductive chuck can clamp and release the electrode 220. At the same time, since the conductive chuck can energize the electrode 220, when the conductive chuck can clamp the electrode 220, the contact with the electrode 220 is closer, which increases the probability of complete contact between the conductive chuck and the electrode 220 and reduces the damage to the conductive chuck caused by arcing due to incomplete contact between the conductive chuck and the electrode 220. Therefore, the first brake 231 can achieve precise control of the electrode 220, and improve the service life of the conductive chuck and the stability of the electrification of the electrode 220.

[0100] In the embodiment of the present application, the first pressure cylinder 2312 is provided with a first elastic member (not shown in the figure), and the first pressure cylinder 2312 is configured to drive the conductive chuck to abut against or separate from the electrode 220 through the first elastic member.

[0101] Specifically, the first elastic member can be arranged inside the first pressure cylinder 2312. Under the deformation pressure of the first elastic member, the first pressure cylinder 2312 can be operated to approach or move away from the electrode 220, so that the first pressure cylinder 2312 can drive the conductive chuck to abut against or detach from the electrode 220.

[0102] Optionally, the first elastic member may be a component capable of elastic deformation, such as a spring laminate or a plastic material, etc., which is not limited in the present application.

[0103] Therefore, by arranging a first elastic member in the first pressure cylinder 2312, the conductive chuck is driven to abut against or detach from the electrode 220 by the first elastic member, that is, the driving of the conductive chuck is achieved by the elastic deformation of the first elastic member. The force generated by the elastic deformation is easy to control, thereby making the driving of the conductive chuck more precise, and can improve the accuracy of the control of the electrode 220 by the first brake 231, thereby improving the performance of the graphitization furnace 200.

[0104] In the embodiment of the present application, the graphitization furnace 200 further includes a first hydraulic system (not shown in the figure), which is used to provide hydraulic power for the elastic deformation of the first elastic member.

[0105] Specifically, the first hydraulic system can be connected to the first brake 231 to provide power, i.e., hydraulic power, to the first elastic member in the first brake 231 by controlling the pressure of the liquid. For example, hydraulic oil of 5MPa to 15MPa is injected through the first hydraulic system to provide power to the first elastic member.

[0106] Therefore, the first hydraulic system provides hydraulic power to the first elastic member, and the provided power is easy to adjust, thereby improving the performance of the graphitization furnace 200.

[0107] In the embodiment of the present application, the clamping device 230 may include a cooling component (not shown in the figure) and a conductive clamp, the conductive clamp is connected to the cooling component, and the conductive clamp is in contact with the electrode.

[0108] Specifically, the conductive clamp may be a conductive clamp in the first holding brake 231. The cooling component may cool the conductive clamp, and when the conductive clamp abuts against the electrode 220, the temperature of the electrode 220 is reduced.

[0109] Therefore, by connecting the conductive chuck to the cooling component, the electrode 220 can be cooled while the conductive chuck is cooled, which is beneficial to protecting the conductive chuck and reducing the probability of oxidation of the electrode 220 at high temperature, thereby improving the performance of the graphitization furnace 200.

[0110] In an embodiment of the present application, the conductive chuck is provided with a guide groove, and the cooling component is provided in the guide groove.

[0111] Specifically, at least a portion of the cooling component may be disposed in the guide groove to achieve cooling of the conductive chuck, and further achieve cooling of the electrode 220 .

[0112] Therefore, by providing a cooling component in the guide groove of the conductive chuck, the connection between the cooling component and the conductive chuck is stable, and the electrode 220 can be cooled while cooling the conductive chuck, which is beneficial to the protection of the conductive chuck and reduces the probability of oxidation of the electrode 220 at high temperature, thereby improving the performance of the graphitization furnace 200.

[0113] In the embodiment of the present application, the cooling component may include a flow channel 2313a, and the flow channel 2313a contains a fluid.

[0114] Specifically, the flow channel 2313a includes a water inlet and a water outlet to achieve the flow of fluid, thereby achieving the cooling function. The fluid contained in the flow channel 2313a can be a liquid with a cooling function, such as water, etc., which is not limited in this application.

[0115] Therefore, the cooling function is achieved by the flow channel 2313 a containing the fluid, which is easy to implement and maintain, thereby improving the production efficiency of the graphitization furnace 200.

[0116] Optionally, in some embodiments, the conductive chuck may be provided with a flow channel containing a fluid, that is, the fluid may directly contact the conductive chuck itself to achieve cooling of the conductive chuck and the electrode 220 .

[0117] In the embodiment of the present application, the ratio of the contact area between the conductive clamp and the electrode 220 to the area of ​​the first surface of the electrode 220 is 1 / 3 to 1, and optionally, 1 / 2 to 9 / 10.

[0118] Specifically, the first surface of the electrode 220 may be one or more surfaces of the electrode 220. For example, when the electrode 220 is a cylinder, the first surface may be a side surface of the electrode 220, which may be unfolded into a rectangle. For another example, when the electrode 220 is a prism, the first surface may be at least one side surface of the electrode 220. This application is not limited thereto. The ratio of the contact area to the area of ​​the first surface of the electrode 220 may be 1 / 3, 1 / 2, 2 / 3, 7 / 10, 4 / 5, or 8 / 10.

[0119] Therefore, by setting the ratio of the contact area between the conductive chuck and the electrode 220 to the area of ​​the first surface of the electrode 220 within a certain range, the probability of contact between the conductive chuck and the electrode 220 can be increased, thereby improving the stability of the power supply to the electrode 220 and further improving the performance of the graphitization furnace 200.

[0120] Optionally, the first holding brake 231 may have the same structure as the conductive water-cooled holding brake 9 shown in FIG. 1 .

[0121] In the embodiment of the present application, as shown in FIG. 2 and FIG. 3 , the clamping device 230 may further include a second brake 232 . The second brake 232 surrounds the electrode 220 and is used to clamp or release the electrode 220 .

[0122] Specifically, the clamping device 230 may include a second brake 232 in addition to the first brake 231 . The second brake 232 may clamp or release the electrode 220 . When clamping the electrode 220 , the second brake 232 may fix the electrode 220 .

[0123] Optionally, the clamping device 230 may include one or more second brakes 232 , which is not limited in this application.

[0124] Therefore, by providing the clamping device 230 including a second brake 232 surrounding the electrode 220, the electrode 220 can be clamped or released, so that when the second brake 232 clamps the electrode 220, the electrode 220 is in a stationary state relative to the second brake 232, and when the second brake 232 releases the electrode 220, the electrode 220 can move within the surrounding area of ​​the second brake 232 relative to the second brake 232, thereby achieving control of the movement accuracy of the electrode 220 through the second brake 232, reducing the probability of the electrode 220 breaking, and reducing the damage caused by the moving electrode 220 to the inside of the furnace body 210 of the graphitization furnace 200, thereby improving the performance of the graphitization furnace 200.

[0125] In some possible embodiments, the clamping device 230 may include a first brake 231 and a second brake 232. When the first brake 231 releases the electrode 220 and the second brake 232 clamps the electrode 220, the lifting device 240 can drive the first brake 231 to move in the second direction y. When the first brake 231 clamps the electrode 220 and the second brake 232 releases the electrode 220, the lifting device 240 can drive the first brake 231 and the electrode 220 to move in the first direction x. For example, in a vertical graphitization furnace, when the electrode 220 is placed vertically, the first brake 231 and the second brake 232 can cooperate to lower the electrode 220. Specifically, the first brake 231 can be first released from the electrode 220, and the first brake 231 can be moved upward to a certain position of the electrode 220, and then the electrode 220 can be clamped, and the second brake 232 can be released from the electrode 220, and then the first brake 231 can be moved downward, so that the first brake 231 drives the electrode 220 to move downward, thereby allowing the electrode 220 to move toward the inside of the furnace body 210, thereby realizing the lowering of the electrode 220.

[0126] Therefore, the movement of the electrode 220 into the interior of the furnace body 210 is achieved through the cooperation of the first brake 231 and the second brake 232. When the first brake 231 releases the electrode 220 and moves, the second brake 232 is in a state of clamping the electrode 220, so that the electrode 220 is fixed and does not shake. When the first brake 231 clamps the electrode 220 and drives the electrode 220 to move, the electrode 220 is in a stationary state relative to the first brake 231. Therefore, by using the brake to fix the electrode 220 during its movement into the furnace body, the damage of the electrode 220 to the graphitization furnace 200 can be reduced, thereby improving the performance of the graphitization furnace 200.

[0127] The following describes the specific structure of the second brake 232 by way of example, with reference to Figures 4-7 , using the electrode 220 as a cylinder. Figures 4-7 respectively illustrate the front view, side view, top view, and perspective view of the electrode 220, the clamping device 230, and the lifting device 240 included in a graphitization furnace provided in an embodiment of the present application.

[0128] In the embodiment of the present application, as shown in Figures 4-7, the second brake 232 may include a second pressure ring 2321 and a second pressure cylinder 2322; the second pressure cylinder 2322 is disposed in the second pressure ring 2321, and the second pressure cylinder 2322 is configured to abut or detach from the electrode 220.

[0129] Specifically, the second pressure ring 2321 is an annular structure, and a second pressure cylinder 2322 is provided inside the second pressure ring. The second pressure cylinder 2322 is configured to abut against or disengage from the surface of the electrode 220 to clamp or loosen the electrode 220 .

[0130] Therefore, by configuring the second holding brake 232 to include a second pressure ring 2321 and a second pressure cylinder 2322, the annular structure of the second pressure ring 2321 can surround the electrode 220. When the second pressure cylinder 2322 is disposed within the second pressure ring 2321, the second pressure cylinder 2322 can more accurately approach and move away from the surface of the electrode 220 under the fixed support of the second pressure ring 2321. Thus, the second holding brake 232 enables precise control of the electrode 220, improving the performance of the graphitization furnace 200.

[0131] In the embodiment of the present application, the second pressure cylinder 2322 may be provided with a second elastic member (not shown in the figure), and the second pressure cylinder 2322 is configured to abut against or detach from the electrode 220 through the second elastic member.

[0132] Specifically, the second elastic member may be disposed inside the second pressure cylinder 2322 . Under the deformation pressure of the second elastic member, the second pressure cylinder 2322 abuts against or separates from the surface of the electrode 220 .

[0133] Optionally, the second elastic member may be a component capable of elastic deformation, such as a spring laminate or a plastic material, etc., which is not limited in the present application.

[0134] Therefore, by arranging a second elastic member in the second pressure cylinder 2322, the second elastic member is used to drive the second pressure cylinder 2322 to abut against or separate from the electrode 220, that is, the driving of the second pressure cylinder 2322 is achieved by the elastic deformation of the second elastic member. The force generated by the elastic deformation is easy to control, thereby making the driving of the second pressure cylinder 2322 more precise, and can improve the accuracy of the second brake 232 in controlling the electrode 220, thereby improving the performance of the graphitization furnace 200.

[0135] In the embodiment of the present application, the graphitization furnace 200 may further include a second hydraulic system (not shown in the figure), which is used to provide hydraulic power for the elastic deformation of the second elastic member.

[0136] Specifically, the second hydraulic system can be connected to the second brake 232 to provide power, i.e. hydraulic power, to the second elastic member in the second brake 232 by controlling the pressure of the liquid. For example, hydraulic oil of 5MPa to 15MPa is injected through the second hydraulic system to provide power to the second elastic member.

[0137] Therefore, the second elastic member is provided with hydraulic power by the second hydraulic system, and the provided power is easy to adjust, thereby improving the performance of the graphitization furnace 200.

[0138] Optionally, the second holding brake 232 may have the same structure as the fixed holding brake 8 shown in FIG. 1 .

[0139] In an embodiment of the present application, the first brake 231 and the second brake 232 may both include a third pressure ring (not shown in the figure) and a third pressure cylinder (not shown in the figure); the third pressure cylinder is arranged in the third pressure ring, and the third pressure cylinder is configured to abut or disengage from the electrode.

[0140] The third pressure ring can have the same structure as the second pressure ring 2321. For details about the third pressure ring, refer to the description of the second pressure ring 2321 above and will not be repeated here. Similarly, the third pressure cylinder can have the same structure as the second pressure cylinder 2322. For details about the third pressure cylinder, refer to the description of the second pressure cylinder 2322 above and will not be repeated here.

[0141] Therefore, by providing the first holding brake 231 and the second holding brake 232 with the same structure, the control method of the same holding brake is made the same, which is easy to implement and operate, thereby improving the performance of the graphitization furnace 200.

[0142] In the embodiment of the present application, the third pressure cylinder is provided with a third elastic member (not shown in the figure), and the third pressure cylinder is configured to abut against or detach from the electrode 220 through the third elastic member.

[0143] Specifically, the third elastic member may have the same structure as the second elastic member. For an introduction to the third elastic member, reference may be made to the description of the second elastic member, which will not be repeated here.

[0144] Therefore, by arranging a third elastic member in the third pressure cylinder, the third pressure cylinder is driven by the third elastic member to abut against or separate from the electrode 220, that is, the driving of the third pressure cylinder is achieved by the elastic deformation of the third elastic member. The force generated by the elastic deformation is easy to control, thereby making the driving of the third pressure cylinder more precise, and can improve the accuracy of the control of the electrode 220 by the first brake 231 and the second brake 232, thereby improving the performance of the graphitization furnace 200.

[0145] In the embodiment of the present application, the graphitization furnace 200 may further include a third hydraulic system (not shown in the figure), which is used to provide hydraulic power for the elastic deformation of the third elastic member.

[0146] Specifically, the third hydraulic system may be connected to the first holding brake 231 and the second holding brake 232 , and provide power, ie, hydraulic power, to the third elastic members in the first holding brake 231 and the second holding brake 232 by controlling the pressure of the liquid.

[0147] Therefore, the third elastic member is provided with hydraulic power by the third hydraulic system, and the provided power is easy to adjust, thereby improving the performance of the graphitization furnace 200.

[0148] In the embodiment of the present application, the distance between the first holding brake 231 and the second holding brake 232 is greater than 300 mm.

[0149] Specifically, the distance between the first brake 231 and the second brake 232 can be the distance between the center of the first brake 231 and the center of the second brake 232, or it can be the distance between the first brake 231 and the second brake 232. This application does not limit this. For example, the distance can be 400mm, 500mm or 600mm, etc.

[0150] Optionally, the distance between the first brake 231 and the second brake 232 can be set based on the actual length of the electrode in use, which is not limited in this application. Thus, the distance between the first brake 231 and the second brake 232 can be set based on the actual length of the electrode in use, which facilitates using the first brake 231 and the second brake 232 to move the electrode 220, thereby improving the performance of the graphitization furnace 200.

[0151] Therefore, by setting the distance between the first holding brake 231 and the second holding brake 232 , a certain distance is provided for the movement of the holding brake, which facilitates the holding brake to drive the electrode 220 to move, thereby improving the performance of the graphitization furnace 200 .

[0152] In an embodiment of the present application, as shown in FIG8 , the lifting device 240 may include a lifting cylinder 241 , and the graphitization furnace 200 may further include a fourth hydraulic system (not shown in the figure), which is used to provide hydraulic power to the lifting cylinder 241 so that the lifting cylinder 241 moves the electrode 220 .

[0153] Specifically, the lifting cylinder 241 can provide the electrode 220 with power to move in a fixed direction, so that the electrode 220 can move in a fixed direction, thereby reducing the damage caused by the moving electrode 220 to the inside of the furnace body 210 of the graphitization furnace 200 and improving the performance of the graphitization furnace 200.

[0154] Optionally, the first hydraulic system, the second hydraulic system, the third hydraulic system and the fourth hydraulic system may be the same hydraulic system, or different hydraulic systems, or at least two of the hydraulic systems may be the same hydraulic system, which is not limited in this application.

[0155] When the first to fourth hydraulic systems are the same hydraulic system, different pipes can be connected to the same hydraulic system, different pipes can be connected to different components, and valves and other components can be set to provide power for different components.

[0156] In some possible implementations, the lifting device 240 may be connected to the furnace body 210 , or may be connected to a support frame or other device to achieve fixed support of the lifting device 240 , which is not limited in this application.

[0157] The present application also provides a battery production system, comprising the graphitization furnace 200 in any of the above embodiments, wherein the graphitization furnace 200 is used to produce negative electrode graphite materials for batteries.

[0158] It is understandable that the battery production system may include, in addition to the graphitization furnace 200 for producing the negative electrode graphite material of the battery, related equipment for producing other battery materials.

[0159] The battery production system may be a battery production line, and a plurality of devices in the battery production line may be arranged in the same centralized location, or may also be arranged in separate locations.

[0160] It should be noted that in the above embodiments of the present application, only part of the structure of the graphitization furnace 200 is listed. In addition to the structures involved in the above embodiments, the graphitization furnace 200 in the present application may also include other system structures of the graphitization furnace in the relevant technology, such as a feeding system, a discharging system, an electrical system of the electrode, an electrode clamping system, an exhaust treatment system, etc. The relevant technical solutions of each system can be found in the specific description in the relevant technology, and will not be discussed in detail herein.

[0161] Figure 9 shows a schematic flow chart of a control method for a graphitization furnace provided in an embodiment of the present application. The graphitization furnace may include a furnace body, an electrode, a clamping device, and a lifting device. A material channel is provided within the furnace body, with at least a portion of the electrode located within the material channel. The clamping device is used to clamp the electrode, and the lifting device is connected to the clamping device. This control method 300 may include some or all of the following:

[0162] 310 , control the lifting device to drive the clamping device to move the electrode along a first direction, where the first direction is parallel to the axis of the material channel.

[0163] It should be noted that the structure of the graphitization furnace involved in the method embodiment can refer to the graphitization furnace 200 shown in Figures 2 to 8 above, and will not be repeated here.

[0164] In some possible embodiments, the clamping device includes a first brake, which surrounds the electrode and is used to clamp or release the electrode, and the first brake is connected to the lifting device; the first brake can be controlled to release the electrode; the lifting device can be controlled to drive the first brake to move in a second direction, which is opposite to the first direction; the first brake is controlled to clamp the electrode; and the lifting device is controlled to drive the first brake and the electrode to move in the first direction.

[0165] In other possible embodiments, the clamping device includes a second brake, which surrounds the electrode and is used to clamp or release the electrode. The first brake can be controlled to release the electrode and the second brake can be controlled to clamp the electrode; the lifting device can be controlled to drive the first brake to move in the second direction; the first brake can be controlled to clamp the electrode and the second brake can be controlled to release the electrode; the lifting device can be controlled to drive the first brake and the electrode to move in the first direction.

[0166] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A graphitization furnace, characterized in that: include: A furnace body (210), wherein a material channel (211) is provided in the furnace body (210); an electrode (220), wherein at least a portion of the electrode (220) is located in the material channel (211); A clamping device (230), the clamping device (230) being used to clamp the electrode (220); A lifting device (240), wherein the lifting device (240) is connected to the clamping device (230), and the lifting device (240) is used to move the electrode (220) along a first direction (x), wherein the first direction (x) is parallel to the axis of the material channel (211).

2. The graphitization furnace according to claim 1, characterized in that: The clamping device (230) comprises a first brake (231), the first brake (231) surrounds the electrode (220) and is used to clamp or release the electrode (220), and the first brake (231) is connected to the lifting device (240).

3. The graphitization furnace according to claim 2, characterized in that: The first holding brake (231) comprises a first pressure ring (2311), a first pressure cylinder (2312) and a conductive clamp; The first pressure cylinder (2312) is arranged in the first pressure ring (2311), and the conductive chuck is arranged on a side of the first pressure cylinder (2312) close to the electrode (220), and the first pressure cylinder (2312) is configured to drive the conductive chuck to abut against or detach from the electrode (220).

4. The graphitization furnace according to claim 3, characterized in that: The first pressure cylinder (2312) is provided with a first elastic member, and the first pressure cylinder (2312) is configured to drive the conductive chuck to abut against or detach from the electrode (220) through the first elastic member.

5. The graphitization furnace according to claim 4, characterized in that: The graphitization furnace further includes a first hydraulic system, and the first hydraulic system is used to provide hydraulic power for the elastic deformation of the first elastic member.

6. The graphitization furnace according to any one of claims 1 to 5, characterized in that: The clamping device (230) comprises a cooling component and a conductive clamp, wherein the conductive clamp is connected to the cooling component and contacts the electrode (220).

7. The graphitization furnace according to claim 6, wherein the conductive chuck is provided with a guide groove, and the cooling component is arranged in the guide groove.

8. The graphitization furnace according to claim 6 or 7, characterized in that: The cooling component includes a flow channel containing a fluid.

9. The graphitization furnace according to any one of claims 3 to 8, characterized in that: The ratio of the contact area between the conductive clamp and the electrode (220) to the area of ​​the first surface of the electrode (220) is 1 / 3 to 1, and optionally, 1 / 2 to 9 / 10.

10. The graphitization furnace according to any one of claims 2 to 9, characterized in that: The clamping device (230) further comprises a second brake (232), wherein the second brake (232) surrounds the electrode (220) and is used for clamping or releasing the electrode (220).

11. The graphitization furnace according to claim 10, characterized in that: The second holding brake (232) comprises a second pressure ring (2321) and a second pressure cylinder (2322); The second pressure cylinder (2322) is disposed in the second pressure ring (2321), and the second pressure cylinder (2322) is configured to abut against or detach from the electrode (220).

12. The graphitization furnace according to claim 11, characterized in that: The second pressure cylinder (2322) is provided with a second elastic member, and the second pressure cylinder (2322) is configured to abut against or detach from the electrode (220) through the second elastic member.

13. The graphitization furnace according to claim 12, characterized in that: The graphitization furnace further includes a second hydraulic system, and the second hydraulic system is used to provide hydraulic power for the elastic deformation of the second elastic member.

14. The graphitization furnace according to claim 10, characterized in that: The first holding brake (231) and the second holding brake (232) both include a third pressure ring and a third pressure cylinder; The third pressure cylinder is disposed in the third pressure ring, and the third pressure cylinder is configured to abut against or separate from the electrode (220).

15. The graphitization furnace according to claim 14, characterized in that: The third pressure cylinder is provided with a third elastic member, and the third pressure cylinder is configured to abut against or detach from the electrode (220) through the third elastic member.

16. The graphitization furnace according to claim 15, characterized in that: The graphitization furnace further includes a third hydraulic system, and the third hydraulic system is used to provide hydraulic power for the elastic deformation of the third elastic member.

17. The graphitization furnace according to any one of claims 10 to 16, characterized in that: The distance between the first holding brake (231) and the second holding brake (232) is greater than 300 mm.

18. The graphitization furnace according to any one of claims 1 to 17, characterized in that: The lifting device (240) includes a lifting cylinder (241), and the graphitization furnace also includes a fourth hydraulic system, wherein the fourth hydraulic system is used to provide hydraulic power to the lifting cylinder (241) so that the lifting cylinder (241) moves the electrode (220).

19. A battery production system, characterized in that: include: The graphitization furnace according to any one of claims 1 to 18, wherein the graphitization furnace is used to produce negative electrode graphite material for a battery.

20. A method for controlling a graphitization furnace, characterized in that: The graphitization furnace comprises: a furnace body, an electrode, a clamping device and a lifting device, wherein a material channel is provided in the furnace body, at least a part of the electrode is located in the material channel, the clamping device is used to clamp the electrode, and the lifting device is connected to the clamping device; The control method comprises: The lifting device is controlled to drive the clamping device to move the electrode along a first direction, wherein the first direction is parallel to the axis of the material channel.

21. The control method according to claim 20, characterized in that: The clamping device comprises a first brake, which surrounds the electrode and is used to clamp or release the electrode, and the first brake is connected to the lifting device; The control method comprises: Controlling the first brake to release the electrode; Controlling the lifting device to drive the first brake to move in a second direction, wherein the second direction is opposite to the first direction; Controlling the first holding brake to clamp the electrode; The lifting device is controlled to drive the first brake and the electrode to move toward the first direction.

22. The control method according to claim 21, characterized in that: The clamping device further comprises a second brake, which surrounds the electrode and is used to clamp or release the electrode; The control method comprises: Controlling the first holding brake to release the electrode, and controlling the second holding brake to clamp the electrode; Controlling the lifting device to drive the first brake to move toward the second direction; Controlling the first holding brake to clamp the electrode, and controlling the second holding brake to release the electrode; The lifting device is controlled to drive the first brake and the electrode to move toward the first direction.

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