A graphitization furnace power transmission method, system and power transmission vehicle

Abstract

The present invention discloses a method, system and a power transmission vehicle for a graphitization furnace. The method comprises: moving the power transmission vehicle to a target graphitization furnace; dividing the power transmission process into three power transmission stages according to the power transmission time, namely, a preheating stage, a heating stage and a stabilization stage; according to different power transmission stages, using associated power transmission parameters and pressure parameters on the target graphitization furnace to act on the target graphitization furnace to complete the graphitization process. The present invention adjusts the relationship between the power transmission current and the internal pressure of the graphitization furnace according to the power transmission time, thereby shortening the graphitization time, reducing energy consumption, and reducing the expansion rate of the graphitized product.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of control or regulation technology, and specifically to a method and system for transmitting electricity to a graphitization furnace, and a power transmission vehicle. Background Art

[0002] As a device that uses resistance heating to generate high temperatures to convert carbon materials into graphite, graphitization furnaces are widely used in the production of negative electrode materials for lithium-ion batteries and sodium-ion batteries. During the operation of a graphitization furnace, the temperature inside the furnace reaches about 3000℃ to better complete the graphitization conversion of carbon materials.

[0003] In order to improve the energy density of the battery, the negative electrode material produced needs to ensure that it has a low expansion rate. However, in the actual production process, especially in the high-temperature graphitization process, the carbon material is greatly affected by temperature, which leads to an increase in the expansion rate. In addition to affecting the energy density of the battery, the expansion rate itself will also have a certain impact on the performance of the negative electrode material. For example, too high an expansion rate may cause the destruction of the carbon material structure and the reduction of purity, thereby affecting its conductivity; too high an expansion rate may cause cracks and defects inside the carbon material, thereby reducing its mechanical strength. For the above reasons, the prior art generally obtains a graphitized product with a lower expansion rate by improving the quality of the carbon material itself, or adjusting the temperature curve, or adding or adjusting the catalyst, etc. These methods all have certain limitations, either increasing the cost or still failing to reduce the defect of the expansion rate. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of the embodiments of the present invention is to provide a method, system and power transmission vehicle for a graphitization furnace, which adjust the relationship between the power transmission current and the internal pressure of the graphitization furnace according to the power transmission time, thereby shortening the graphitization time and reducing energy consumption while also reducing the expansion rate of the graphitized product.

[0005] In order to solve the above problems, a first aspect of an embodiment of the present invention discloses a method for transmitting power to a graphitization furnace, comprising:

[0006] Move the power supply trolley to the target graphitization furnace;

[0007] The power transmission process is divided into three power transmission stages according to the power transmission time, namely the preheating stage, the heating stage and the stabilization stage;

[0008] According to different power transmission stages, associated power transmission parameters and pressure parameters on the target graphitization furnace are used to act on the target graphitization furnace to complete the graphitization process;

[0009] Wherein, according to different power transmission stages, associated power transmission parameters and pressure parameters of the target graphitization furnace are used to act on the target graphitization furnace, including:

[0010] In the preheating stage and the heating stage, the following power transmission parameters and pressure parameters are applied to the target graphitization furnace:

[0011] ;

[0012] in, is the current change rate, is the pressure change rate, k and b are the time coefficient and constant respectively, t The power supply time;

[0013] During the stabilization stage, the maximum current and the maximum pressure are applied to the target graphitization furnace.

[0014] As a preferred embodiment, in the first aspect of the embodiment of the present invention, in the preheating stage, the current change rate is positive and the current change rate gradually increases, the pressure change rate is positive and the pressure change rate gradually decreases, and the time coefficient k and constant b Both are greater than zero.

[0015] As a preferred embodiment, in the first aspect of the embodiment of the present invention, in the heating stage, the current change rate is positive and the current change rate gradually decreases, the pressure change rate is positive and the pressure change rate gradually increases, and the time coefficient k Equal to zero, constant b Greater than zero.

[0016] As a preferred embodiment, in the first aspect of the embodiment of the present invention, during the heating stage, a constant power mode is used to supply power to the target graphitization furnace.

[0017] As a preferred embodiment, in the first aspect of the embodiment of the present invention, the maximum current and the maximum pressure are respectively the current value and the pressure value corresponding to the end node of the heating stage.

[0018] As a preferred embodiment, in the first aspect of the embodiment of the present invention, a transformer and a gas storage tank are installed on the power transmission vehicle, and a graphite electrode and a gas input interface are provided on the target graphitization furnace;

[0019] Move the power supply trolley to the target graphitization furnace, including:

[0020] The power transmission trolley is driven to move to the target graphitization furnace, and the electrical connection between the secondary output end of the transformer and the graphite electrode, and the mechanical connection between the output interface of the gas storage tank and the gas input interface are automatically or manually completed.

[0021] A second aspect of an embodiment of the present invention discloses a power transmission system for a graphitization furnace, comprising:

[0022] A moving unit, used for moving the power supply trolley to the target graphitization furnace;

[0023] A division unit, used for dividing the power transmission process into three power transmission stages according to the power transmission time, namely a preheating stage, a heating stage and a stabilization stage;

[0024] A graphitization unit, used to act on the target graphitization furnace by using associated power transmission parameters and pressure parameters on the target graphitization furnace according to different power transmission stages to complete the graphitization process;

[0025] The graphitization unit includes:

[0026] In the preheating stage and the heating stage, the following power transmission parameters and pressure parameters are applied to the target graphitization furnace:

[0027] ;

[0028] in, is the current change rate, is the pressure change rate, k and b are the time coefficient and constant respectively, t The power supply time;

[0029] During the stabilization stage, the maximum current and the maximum pressure are applied to the target graphitization furnace.

[0030] A third aspect of an embodiment of the present invention discloses an electronic device, comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor. When the processor executes the computer program, the steps of the method for transmitting power to a graphitization furnace disclosed in the first aspect of the embodiment of the present invention are implemented.

[0031] A fourth aspect of an embodiment of the present invention discloses a computer-readable storage medium storing a computer program, wherein the computer program enables a computer to execute the steps of the method for transmitting power to a graphitization furnace disclosed in the first aspect of the embodiment of the present invention.

[0032] A fifth aspect of an embodiment of the present invention discloses a power transmission vehicle, which includes a processor and a transformer and a gas storage tank installed on the power transmission vehicle;

[0033] The processor is used to:

[0034] Driving the power transmission trolley to move to the target graphitization furnace, automatically or manually completing the electrical connection between the secondary output end of the transformer and the graphite electrode of the target graphitization furnace, and the mechanical connection between the output interface of the gas storage tank and the gas input interface of the target graphitization furnace;

[0035] According to different power transmission stages, associated power transmission parameters and pressure parameters on the target graphitization furnace are used to act on the target graphitization furnace to complete the graphitization process. The power transmission stage is divided into a preheating stage, a heating stage and a stabilization stage according to the power transmission time sequence;

[0036] Wherein, according to different power transmission stages, associated power transmission parameters and pressure parameters of the target graphitization furnace are used to act on the target graphitization furnace, including:

[0037] In the preheating stage and the heating stage, the following power transmission parameters and pressure parameters are applied to the target graphitization furnace:

[0038] ;

[0039] in, is the current change rate, is the pressure change rate, k and b are the time coefficient and constant respectively, t The power supply time;

[0040] During the stabilization stage, the maximum current and the maximum pressure are applied to the target graphitization furnace.

[0041] A sixth aspect of an embodiment of the present invention discloses a computer program product. When the computer program product is run on a computer, the computer is enabled to execute the steps of the method for transmitting power to a graphitization furnace disclosed in the first aspect of the embodiment of the present invention.

[0042] A seventh aspect of an embodiment of the present invention discloses an application publishing platform, which is used to publish a computer program product. When the computer program product runs on a computer, the computer executes the steps of the graphitization furnace power supply method disclosed in the first aspect of the embodiment of the present invention.

[0043] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0044] The embodiment of the present invention combines the power transmission current and the pressure in the graphitization furnace, and relies on electric heating and pressure to act on the carbon material at the same time, so as to accelerate the graphitization process, improve efficiency, and save energy. Moreover, the expansion rate of the carbon material during the temperature increase process is suppressed by pressure, thereby improving the quality of the produced negative electrode material. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic flow chart of a method for transmitting electricity to a graphitization furnace provided in an embodiment of the present invention;

[0046] Figure 2 is a structural schematic diagram of a graphitization furnace provided in an embodiment of the present invention;

[0047] Figure 3 It is a schematic diagram of the principle of a graphitization power supply provided by an embodiment of the present invention;

[0048] Figure 4 is a schematic diagram of an ideal temperature change curve provided by an embodiment of the present invention;

[0049] Figure 5 is a schematic diagram of a current variation curve provided by an embodiment of the present invention;

[0050] Figure 6 is a schematic diagram of a pressure change curve provided by an embodiment of the present invention;

[0051] Figure 7 is a schematic diagram of a resistance change curve in a furnace provided by an embodiment of the present invention;

[0052] Figure 8 It is a structural schematic diagram of a power transmission system for a graphitization furnace provided by an embodiment of the present invention;

[0053] Fig. 9 It is a structural schematic diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0054] This specific implementation manner is merely an explanation of an embodiment of the present invention, and it is not a limitation of the embodiment of the present invention. After reading this specification, a person skilled in the art may make non-creative modifications to the embodiment as needed, but as long as it is within the scope of the claims of the embodiment of the present invention, it is protected by the patent law.

[0055] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments in the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the present invention.

[0056] The term "comprise" and any variations thereof in the specification and claims of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0057] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0058] The embodiment of the present invention combines the power transmission current and the pressure in the graphitization furnace, and relies on electric heating and pressure to act on the carbon material at the same time, so as to accelerate the graphitization process, improve efficiency, and save energy. Moreover, the expansion rate of the carbon material during the temperature increase process is suppressed by pressure, thereby improving the quality of the produced negative electrode material. The following is a detailed description with reference to the accompanying drawings.

[0059] Embodiment 1

[0060] See also Figure 1 , Figure 1 FIG. 1 is a flow chart of a method for transmitting electricity to a graphitization furnace disclosed in an embodiment of the present invention. Figure 1 As shown, the graphitization furnace power transmission method includes:

[0061] S110, moving the power supply trolley to the target graphitization furnace.

[0062] The power transmission trolley is an existing conventional power transmission trolley with a gas storage tank installed, which is used to input a certain amount of gas into the graphitization furnace, thereby increasing the pressure inside the graphitization furnace. The movement mode of the power transmission trolley can adopt the driving mode in other schemes previously applied by the applicant. After the power transmission trolley moves to the target graphitization furnace (i.e., the graphitization furnace that needs to complete production), the secondary output end of the transformer installed on the power transmission trolley (i.e., the output end of the secondary winding of the transformer) can be manually or automatically connected to the graphite electrode on the target graphitization furnace, and the output interface of the gas storage tank installed on the power transmission trolley can be manually or automatically connected to the gas input interface on the target graphitization furnace.

[0063] For example, in Figure 2The simplified structure of the graphitization furnace is shown in FIG. The graphitization furnace includes a furnace body 210. The carbon material is fed into the furnace body through a certain feeding mechanism, and the carbon material can also be compacted. A plurality of furnace head electrodes 240 and a plurality of furnace tail electrodes 260 are arranged on the furnace body. The graphite electrode is composed of a furnace head electrode and a furnace tail electrode. The end of the furnace head electrode away from the furnace body is electrically connected to a furnace head busbar 230, and the end of the furnace tail electrode away from the furnace body is electrically connected to a furnace tail busbar 250.

[0064] Figure 3 A simplified schematic diagram of the power supply for graphitization is shown in Figure 3 In the graphitization process, the power supply mainly includes a transformer (BT) and an AC power supply. The AC power supply can use an ultra-high voltage AC power supply, such as 110KV AC. The output end of the AC power supply is connected to the primary winding of the transformer, and the two terminals of the secondary winding of the transformer (if DC power supply is used for heating, a rectifier circuit needs to be added) are respectively connected to the furnace head busbar and the furnace tail busbar.

[0065] The current transmission path is as follows: the current starts from one of the terminals of the secondary winding of the transformer and flows to the furnace head busbar. The current of the furnace head busbar is divided into multiple strands and flows into the furnace head electrode respectively, and then flows into the carbon material in the furnace body for its graphitization process; the current in the carbon material is divided into multiple strands and flows into the furnace tail electrode respectively, and finally converges to the furnace tail busbar and then returns to the other terminal of the secondary winding of the transformer.

[0066] In a preferred embodiment of the present invention, since the output current to the graphite electrode needs to be adjusted and constant power output is required in some time periods, a current transformer (CT) can be connected to one of the terminals of the secondary winding to monitor the output current of the graphitization power supply in real time, and a voltage transformer (PT) is connected in series between the two terminals of the secondary winding to monitor the output voltage of the graphitization power supply in real time. At the same time, current control can also be achieved through existing conventional current regulation circuits (such as PWM control circuits, etc.).

[0067] Compared with the existing graphitization furnace, in the embodiment of the present invention, one or more gas input pipes 220 are arranged on the furnace body of the graphitization furnace, and the end of the gas input pipe away from the furnace body is marked as a gas input interface, which is connected to the inside of the furnace body. When the furnace body is not pressurized, the gas input interface can be blocked by a rubber plug.

[0068] In a preferred embodiment of the present invention, a flow regulating valve and a flow meter can be installed on the output pipeline of the gas storage tank, so that the gas output per unit time of the gas storage tank can be adjusted as needed to change the pressure change rate in the furnace body.

[0069] The above-mentioned control of the current and gas output is conventional technology, and its structure and principle are not described in detail here. As long as it can be used to adjust the current and pressure, it can be applied to the embodiments of the present invention.

[0070] S120, dividing the power transmission process into three power transmission stages according to the power transmission time, namely a preheating stage, a heating stage and a stabilization stage.

[0071] Figure 4 An ideal temperature curve for graphitization is shown. Figure 4 The temperature curve shown can divide the graphitization process into three stages according to the power supply time (or graphitization time).

[0072] Among them, the first stage is the preheating stage, and its time is from the start time of power supply (recorded as time node t0) to the preset end time (recorded as time node t1). The ideal furnace temperature in the preheating stage is from room temperature to 1250°C (that is, the temperature in the preheating stage is preferably 1250°C). In this preheating stage, due to the low temperature in the furnace, the graphitization process has not yet started, the resistance in the furnace is large, and the carbon material basically does not expand, or the expansion rate is very low and can be ignored.

[0073] The second stage (from time node t1 to time node t2) is the graphitization stage, which can be divided into two sub-stages. The temperature range of the first sub-stage is 1250-1800℃. The physical structure and chemical composition of the carbon material will undergo great changes in this sub-stage, that is, the chaotic layer structure of amorphous carbon will gradually transform into a graphitized crystal structure. In this stage, the resistance in the furnace is greatly reduced. When the output voltage of the graphitization power supply remains unchanged, its output current will increase sharply. The temperature range of the second sub-stage is 1800-3000℃ (or above). In this temperature range, the transformation of the graphite crystal structure of the carbon material is basically completed. Continuous heating causes the temperature to continue to rise, which can promote the deepening of the graphitization degree of the carbon material. During the entire graphitization stage, as the temperature in the furnace continues to increase, the expansion rate of the carbon material will also increase significantly, thereby affecting the quality of the graphitized product, such as electrical conductivity and mechanical strength.

[0074] The third stage is the stabilization stage (after time node t2, and lasting for a preset time). During the stabilization stage, the temperature in the furnace is maintained at a relatively high temperature, such as 3000°C. Since the temperature in the entire furnace is not uniform at the end of the second stage, in order to ensure the uniform quality of the graphitized products, power needs to be supplied continuously for a preset time.

[0075] S130, according to different power transmission stages, using associated power transmission parameters and pressure parameters on the target graphitization furnace to act on the target graphitization furnace to complete the graphitization process.

[0076] According to the graphitization process of step S120, the power transmission parameter and the pressure parameter are controlled in association, which can improve the graphitization efficiency on the one hand and the quality of the graphitized product on the other hand.

[0077] Specifically, different power transmission parameters and pressure parameters may be used to correspond to different power transmission stages. Figure 5 and Figure 6 The current curve applied to the graphite electrode and the pressure curve applied to the furnace body are shown respectively. The current curve and the pressure curve are determined by experiments according to the specific usage scenario, such as the furnace body volume, the type of carbon material, etc. Of course, the experiment method only adjusts the values ​​of each stage and has no effect on the change trend. In other words, the embodiment of the present invention is based on the preset change trend, and adjusts the entire graphitization time and the power transmission parameters and pressure parameters of each node by experiments.

[0078] Among them, in the preheating stage, since graphitization has not been carried out, the resistance in the furnace is the largest, and the carbon material has basically not expanded. Therefore, the power supply current can be increased quickly and the pressure in the furnace can be increased slowly. The speed of the two can be reflected by the rate of change:

[0079]

[0080] in, is the current change rate, is the pressure change rate, k and b are time coefficient and constant respectively, and t is the power supply time. In the preheating stage, the current change rate is positive and the current change rate increases gradually, and the pressure change rate is positive and the pressure change rate decreases gradually. In this process, the increase in pressure is mainly used to provide a basic pressure for the subsequent second stage, which does not play a key role in the first stage. Therefore, the pressure change rate can be determined according to the actual pressure value in the furnace, so that the pressure in the furnace can reach the preset pressure value at the end of the first stage.

[0081] In the first stage, the current can be set between 0-8000A / m 2 , the pressure can be set between 0.1-50 MPa.

[0082] Generally, in the first stage, the rate of increase of current is significantly greater than the rate of increase of pressure. When expressed by the current change rate and the pressure change rate, the product of the subsequent current change rate and the subsequent pressure change rate is significantly greater than the product of the previous current change rate and the previous pressure change rate. Therefore, the relationship between the current change rate and the pressure change rate can be characterized by the power transmission time:

[0083]

[0084] in, for t i The current change rate at the moment can be calculated as:

[0085]

[0086] for t i The current value at the moment, for t i-1 The current value at the moment, and t i Moment and t i-1 The difference between the moments is recorded as unit time;

[0087] for t i The pressure change rate at the moment can be calculated as:

[0088]

[0089] for t i The current value at the moment, for t i-1 Current value at the moment.

[0090] Since the product of the subsequent current change rate and the subsequent pressure change rate is significantly greater than the product of the previous current change rate and the previous pressure change rate, the product of the current change rate and the pressure change rate can be a straight line with a slope greater than zero and an intercept greater than zero, that is, the time coefficient k and constant b Both are greater than zero.

[0091] Of course, in other embodiments, the relationship between the current change rate and the pressure change rate may also be represented by a curve as needed:

[0092]

[0093] The second stage is the core stage of the graphitization process. In this stage, as the graphitization process gradually advances, the temperature in the furnace gradually increases, the resistance in the furnace gradually decreases, and the expansion rate of the carbon material (when it is not completely graphitized, it is called carbon material, and when it is completely graphitized, it is called graphitized product) gradually increases. Therefore, in this stage, there are two main purposes of introducing gas (such as nitrogen) into the furnace. One is to accelerate the graphitization process, and the other is to inhibit the expansion rate of the carbon material. The so-called inhibition is just to increase the speed of the expansion rate of the carbon material, rather than completely ensuring that the carbon material does not expand.

[0094] Therefore, in this stage, the power transmission parameters can be directly related to the change of resistance in the furnace, that is, the graphitization furnace is powered at a constant power level, and the output current of the graphitization power supply is adjusted by monitoring the current (collected by current transformer) and voltage (collected by voltage transformer) of the graphitization power supply to control the current regulation circuit, thereby achieving the purpose of constant power control. In this process, according to the measured furnace resistance curve ( Figure 7 As shown in the figure, it can be seen that the current change rate is a positive number and the current change rate gradually decreases. During this process, it is necessary to increase the pressure in the furnace to achieve the above purpose. Moreover, the pressure change rate is a positive number and the pressure change rate gradually increases.

[0095] In the second stage, the current can be set between 8000-15000A / m 2 , the pressure can be set between 50-900 MPa / m 2 Of course, it is understandable that the pressure setting is also related to the pressure resistance of the graphitization furnace itself, and the maximum pressure cannot exceed the bearing range of the graphitization furnace.

[0096] Since the expansion rate is directly related to the temperature, in order to effectively suppress the increase in the expansion rate, the rate of increase of the current must be significantly lower than the rate of increase of the pressure. When presented by the current change rate and the pressure change rate, the product of the subsequent current change rate and the subsequent pressure change rate must be greater than or equal to the product of the previous current change rate and the previous pressure change rate. Therefore, the relationship between the current change rate and the pressure change rate can be characterized by the power transmission time:

[0097]

[0098] As a preferred embodiment, the product of the subsequent current change rate and the subsequent pressure change rate can be equal to the product of the previous current change rate and the previous pressure change rate, that is, in the above formula, the time coefficient k Equal to zero, constant b Greater than zero. In this case, the effect and cost can be balanced to a certain extent. Of course, in order to better suppress the expansion rate, it can also be a time coefficient. k and constantb Both are greater than zero.

[0099] Or use a curve to represent the relationship between the current change rate and the pressure change rate:

[0100]

[0101] In the third stage, the current and pressure at the end of the second stage can be maintained. Since the current and pressure at the end of the second stage are the maximum current and maximum pressure in the entire graphitization process, it means that the maximum current and maximum pressure are applied to the target graphitization furnace in the third stage.

[0102] Embodiment 2

[0103] See also Figure 8 , Figure 8 Schematic diagram of the structure of a power transmission system for a graphitization furnace disclosed in an embodiment of the present invention. Figure 8 As shown, the graphitization furnace power supply system may include:

[0104] A moving unit 310 is used to move the power transmission vehicle to a target graphitization furnace;

[0105] A division unit 320, configured to divide the power transmission process into three power transmission stages according to the power transmission time, namely a preheating stage, a heating stage and a stabilization stage;

[0106] The graphitization unit 330 is used to act on the target graphitization furnace using associated power transmission parameters and pressure parameters on the target graphitization furnace according to different power transmission stages to complete the graphitization process.

[0107] Preferably, the graphitization unit 330 may include:

[0108] In the preheating stage and the heating stage, the following power transmission parameters and pressure parameters are applied to the target graphitization furnace:

[0109] ;

[0110] in, is the current change rate, is the pressure change rate, k and b are the time coefficient and constant respectively;

[0111] In the stabilization stage, the maximum current and the maximum pressure (the maximum current and the maximum pressure are the current value and the pressure value corresponding to the end node of the heating stage, respectively) are applied to the target graphitization furnace.

[0112] Preferably, in the preheating stage, the current change rate is positive and the current change rate increases gradually, the pressure change rate is positive and the pressure change rate decreases gradually, and the time coefficient k and constant b In the heating stage, the target graphitization furnace is powered by constant power, the current change rate is positive and the current change rate decreases gradually, the pressure change rate is positive and the pressure change rate increases gradually, and the time coefficient k Equal to zero, constant b Greater than zero.

[0113] Preferably, a transformer and a gas storage tank are installed on the power transmission vehicle, and a graphite electrode and a gas input interface are provided on the target graphitization furnace;

[0114] The mobile unit 310 may include:

[0115] The power transmission trolley is driven to move to the target graphitization furnace, and the electrical connection between the secondary output end of the transformer and the graphite electrode, and the mechanical connection between the output interface of the gas storage tank and the gas input interface are automatically or manually completed.

[0116] Embodiment 3

[0117] See also Fig. 9 , Fig. 9 A schematic diagram of an electronic device that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the embodiments of the present invention described herein or / and claimed.

[0118] like Fig. 9As shown, the electronic device includes at least one processor 410, and a memory connected to the at least one processor 410, such as a ROM (read-only memory) 420, a RAM (random access memory) 430, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 410 can perform various appropriate actions and processes according to the computer program stored in the ROM 420 or the computer program loaded from the storage unit 480 to the random access memory RAM 430. In the RAM 430, various programs and data required for the operation of the electronic device can also be stored. The processor 410, the ROM 420, and the RAM 430 are connected to each other via a bus 440. The I / O (input / output) interface 450 is also connected to the bus 440.

[0119] A number of components in the electronic device are connected to the I / O interface 450, including: an input unit 460, such as a keyboard, a mouse, etc.; an output unit 470, such as various types of displays, speakers, etc.; a storage unit 480, such as a disk, an optical disk, etc.; and a communication unit 490, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 490 allows the electronic device to exchange information / data with other devices through a computer network such as the Internet or / and various telecommunication networks.

[0120] The processor 410 may be a variety of general or / and special processing components with processing and computing capabilities. Some examples of the processor 410 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 410 performs one or more steps of a method for transmitting electricity to a graphitization furnace described in the first embodiment above.

[0121] In some embodiments, a method for transmitting power to a graphitization furnace may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 480. In some embodiments, part or all of the computer program may be loaded or / and installed on an electronic device via the ROM 420 and / or the communication unit 490. When the computer program is loaded into the RAM 430 and executed by the processor 410, one or more steps of the method for transmitting power to a graphitization furnace described in the first embodiment above may be executed. Alternatively, in other embodiments, the processor 410 may be configured to execute a method for transmitting power to a graphitization furnace in any other appropriate manner (e.g., by means of firmware).

[0122] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, or / and combinations thereof. These various embodiments may include: being implemented in one or more computer programs, which may be executed or / and interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general purpose programmable processor, which may receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0123] The computer programs for implementing the methods of the embodiments of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart or / and the block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0124] In the context of an embodiment of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, device, or equipment. A computer-readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0125] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0126] The above is a detailed introduction to a method, system and a power transmission vehicle for a graphitization furnace disclosed in the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for transmitting electricity to a graphitization furnace, characterized in that: It includes: Move the power supply trolley to the target graphitization furnace; The power transmission process is divided into three power transmission stages according to the power transmission time, namely the preheating stage, the heating stage and the stabilization stage; According to different power transmission stages, associated power transmission parameters and pressure parameters on the target graphitization furnace are used to act on the target graphitization furnace to complete the graphitization process; Wherein, according to different power transmission stages, associated power transmission parameters and pressure parameters of the target graphitization furnace are used to act on the target graphitization furnace, including: During the preheating stage and the heating stage, the following power transmission parameters and pressure parameters are applied to the target graphitization furnace: ； in, is the current change rate, is the pressure change rate, k and b are the time coefficient and constant respectively, t The power supply time; In the preheating stage, the current change rate is positive and the current change rate increases gradually, the pressure change rate is positive and the pressure change rate decreases gradually, and the time coefficient k and constant b are greater than zero; In the heating stage, the current change rate is positive and the current change rate decreases gradually, the pressure change rate is positive and the pressure change rate increases gradually, and the time coefficient k Equal to zero, constant b greater than zero; During the stabilization stage, the maximum current and the maximum pressure are applied to the target graphitization furnace.

2. The method for transmitting electricity to a graphitization furnace according to claim 1, characterized in that: During the heating stage, power is supplied to the target graphitization furnace in a constant power manner.

3. The method for transmitting electricity to a graphitization furnace according to claim 1, characterized in that: The maximum current and the maximum pressure are respectively the current value and the pressure value corresponding to the end node of the heating stage.

4. The method for transmitting electricity to a graphitization furnace according to claim 1, characterized in that: The power transmission trolley is equipped with a transformer and a gas storage tank, and the target graphitization furnace is provided with a graphite electrode and a gas input interface; Move the power supply trolley to the target graphitization furnace, including: The power transmission trolley is driven to move to the target graphitization furnace, and the electrical connection between the secondary output end of the transformer and the graphite electrode, and the mechanical connection between the output interface of the gas storage tank and the gas input interface are automatically or manually completed.

5. A graphitization furnace power transmission system, characterized in that: It includes: A moving unit, used for moving the power supply trolley to the target graphitization furnace; A division unit is used to divide the power transmission process into three power transmission stages according to the power transmission time, namely a preheating stage, a heating stage and a stabilization stage; A graphitization unit, used to act on the target graphitization furnace by using associated power transmission parameters and pressure parameters on the target graphitization furnace according to different power transmission stages to complete the graphitization process; The graphitization unit includes: In the preheating stage and the heating stage, the following power transmission parameters and pressure parameters are applied to the target graphitization furnace: ； in, is the current change rate, is the pressure change rate, k and b are the time coefficient and constant respectively, t The power supply time; In the preheating stage, the current change rate is positive and the current change rate increases gradually, the pressure change rate is positive and the pressure change rate decreases gradually, and the time coefficient k and constant b are greater than zero; In the heating stage, the current change rate is positive and the current change rate decreases gradually, the pressure change rate is positive and the pressure change rate increases gradually, and the time coefficient k Equal to zero, constant b greater than zero; During the stabilization stage, the maximum current and the maximum pressure are applied to the target graphitization furnace.

6. A power transmission vehicle, characterized in that: It includes a processor and a transformer and a gas storage tank installed on the power transmission vehicle; The processor is used to: Driving the power transmission trolley to move to the target graphitization furnace, automatically or manually completing the electrical connection between the secondary output end of the transformer and the graphite electrode of the target graphitization furnace, and the mechanical connection between the output interface of the gas storage tank and the gas input interface of the target graphitization furnace; According to different power transmission stages, associated power transmission parameters and pressure parameters on the target graphitization furnace are used to act on the target graphitization furnace to complete the graphitization process, and the power transmission stage is divided into a preheating stage, a heating stage and a stabilization stage according to the power transmission time sequence; Wherein, according to different power transmission stages, associated power transmission parameters and pressure parameters of the target graphitization furnace are used to act on the target graphitization furnace, including: In the preheating stage and the heating stage, the following power transmission parameters and pressure parameters are applied to the target graphitization furnace: ； in, is the current change rate, is the pressure change rate, k and b are the time coefficient and constant respectively, t The power supply time; In the preheating stage, the current change rate is positive and the current change rate increases gradually, the pressure change rate is positive and the pressure change rate decreases gradually, and the time coefficient k and constant b are greater than zero; In the heating stage, the current change rate is positive and the current change rate decreases gradually, the pressure change rate is positive and the pressure change rate increases gradually, and the time coefficient k Equal to zero, constant b greater than zero; During the stabilization stage, the maximum current and the maximum pressure are applied to the target graphitization furnace.

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