Sintering furnace control method and device, electronic equipment and computer readable storage medium

Abstract

The embodiment of the invention provides a sintering furnace control method and device, electronic equipment and a computer readable storage medium. The method comprises the following steps: acquiring image information of a battery piece in a sintering furnace; determining surface state information of the battery piece according to the image information; and according to the surface state information of the battery piece, the current working parameters of the sintering furnace are adjusted, so that the surface state information of the battery piece is within a preset range. The method is used for achieving the effects of reducing the bad phenomenon of mist blackening of the battery piece, improving the battery performance and improving the qualified rate of the battery.

Description

Technical Field

[0001] The present application relates to the technical field of solar cells, and in particular to a sintering furnace control method, device, electronic device, and computer-readable storage medium. Background Art

[0002] As one of the core parts of new energy equipment to achieve energy storage and power supply, the performance of new energy batteries is crucial in the new energy field. The performance of new energy batteries depends on the raw materials and battery production and preparation process.

[0003] In related technologies, the production and preparation process for new energy batteries includes a screen printing process, which includes screen fabrication, sintering and curing, and sorting and testing. During the sintering and curing process, a sintering furnace is used to dry and cure the slurry on the cell surface, removing the polymer binder from the wet slurry. During the drying process, the solvent evaporates, the slurry undergoes a certain amount of shrinkage, and the solid material and the blue film come closer together, ultimately forming a dry electrode electric field structure.

[0004] However, during the sintering and curing process, the battery cells often exhibit undesirable phenomena such as fogging and blackening. This undesirable phenomenon seriously affects the photoelectric conversion efficiency and appearance quality of the battery cells, resulting in poor battery performance and a high battery defect rate. Summary of the Invention

[0005] The embodiments of the present application provide a sintering furnace control method, device, electronic device and computer-readable storage medium, which are used to reduce the undesirable phenomenon of foggy blackening of battery cells, improve battery performance and increase battery qualification rate.

[0006] In a first aspect, an embodiment of the present application provides a sintering furnace control method, comprising:

[0007] Obtain image information of battery cells in the sintering furnace;

[0008] determining surface state information of the battery cell according to the image information;

[0009] According to the surface state information of the battery cell, the current operating parameters of the sintering furnace are adjusted so that the surface state information of the battery cell is within a preset range.

[0010] In a possible implementation, adjusting the current operating parameters of the sintering furnace according to the surface state information of the cell includes:

[0011] determining target operating parameters of the sintering furnace according to a surface grayscale value of the cell, wherein the surface state information includes the surface grayscale value;

[0012] The current operating parameters of the sintering furnace are adjusted according to the target operating parameters.

[0013] In a possible implementation, determining the target operating parameters of the sintering furnace according to the surface grayscale value of the cell includes:

[0014] Based on the surface grayscale value of the battery cell and the current operating parameter as input parameters, the input is input into a preset operating parameter adjustment model, and the operating parameter adjustment model reflects the correlation between the surface grayscale value of the battery cell, the current operating parameter and the target operating parameter;

[0015] Based on the operating parameter adjustment model, target operating parameters of the sintering furnace are obtained.

[0016] In a possible implementation, adjusting the current operating parameters of the sintering furnace according to the surface state information of the cell includes:

[0017] When the surface grayscale value of the battery cell is greater than or equal to a first preset threshold, or the surface grayscale values of a first preset number of battery cells are greater than or equal to the first preset threshold, the current operating frequency of the sintering furnace is reduced, the surface state information includes the surface grayscale value, and the operating parameters of the sintering furnace include the operating frequency.

[0018] In one possible implementation, reducing the current operating frequency of the sintering furnace includes:

[0019] determining a target operating frequency of the sintering furnace according to a surface grayscale value of the cell, wherein the surface state information includes the surface grayscale value;

[0020] The current operating frequency of the sintering furnace is adjusted according to the target operating frequency to reduce the current operating frequency of the sintering furnace.

[0021] In a possible implementation, adjusting the current operating parameters of the sintering furnace according to the surface state information of the cell includes:

[0022] When the surface grayscale value of the battery cell is less than or equal to a second preset threshold, or the surface grayscale values of a second preset number of battery cells are less than or equal to a second preset threshold, the current operating frequency of the sintering furnace is increased, wherein the first preset threshold is greater than or equal to the second preset threshold.

[0023] In one possible implementation, the method further includes:

[0024] When receiving the jam signal of the next station machine of the sintering furnace, the jam duration is recorded;

[0025] When the blocking time reaches a first preset time, reducing the operating frequency of the sintering furnace to a first operating frequency;

[0026] When the blocking time reaches a second preset time, the operating frequency of the sintering furnace is reduced to a second operating frequency.

[0027] In a possible implementation, adjusting the current operating parameters of the sintering furnace according to the surface state information of the cell includes:

[0028] Determining a target adjustment value based on the surface state information of the battery cell and the jam duration of the next station machine;

[0029] The current operating parameters of the sintering furnace are adjusted according to the target adjustment value.

[0030] In a second aspect, an embodiment of the present application provides a sintering furnace control device, comprising:

[0031] An acquisition module is used to acquire image information of the battery cells in the sintering furnace;

[0032] a processing module, configured to determine surface state information of the cell according to the image information;

[0033] The control module is used to adjust the current operating parameters of the sintering furnace according to the surface state information of the battery cell, so that the surface state information of the battery cell is within a preset range.

[0034] In a third aspect, an embodiment of the present application provides an electronic device, comprising: a memory, a processor;

[0035] The memory stores computer-executable instructions;

[0036] The processor executes the computer-executable instructions stored in the memory, so that the processor executes the above first aspect and / or various possible implementations of the first aspect.

[0037] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the first aspect above and / or various possible implementation methods of the first aspect.

[0038] In a fifth aspect, an embodiment of the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the above first aspect and / or various possible implementation methods of the first aspect.

[0039] The sintering furnace control method, device, electronic device and computer-readable storage medium provided in the embodiments of the present application obtain image information of the battery cell to identify the surface state information of the battery cell based on the image information, determine whether the surface of the battery cell has a trend of foggy blackening, and then adaptively adjust the working parameters of the sintering furnace to avoid the sintering furnace operating at fixed working parameters, which causes the local temperature of the battery cell to rise and cause foggy blackening. This achieves the effect of reducing the undesirable phenomenon of foggy blackening of the battery cell during the sintering and curing process of the battery cell, improving battery performance and increasing the battery qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0041] Figure 1 Schematic diagram of the sintering furnace in the battery production process provided in this application Figure 1 ;

[0042] Figure 2 Schematic diagram of the sintering furnace control method provided in this application Figure 1 ;

[0043] Figure 3 Schematic diagram of the sintering furnace in the battery production process provided in this application Figure 2 ;

[0044] Figure 4 Schematic diagram of the sintering furnace control method provided in this application Figure 2 ;

[0045] Figure 5 Schematic diagram of the sintering furnace control method provided in this application Figure 3 ;

[0046] Figure 6 A schematic diagram of the structure of the sintering furnace control device provided in this application;

[0047] Figure 7 This is a schematic diagram of the structure of the electronic device provided in this application.

[0048] Reference numerals:

[0049] 10: Sintering furnace; 101: Furnace body; 102: Conveying device; 103: LED lamp; 104: Optical detection device; 105: High-precision power sensor; 106: Monitoring screen; 20: Battery cell.

[0050] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0051] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0052] First, let’s explain the terms involved in this application:

[0053] New energy: refers to energy that is renewable, clean, and low-pollution compared to traditional energy (such as fossil fuels such as coal, oil, and natural gas), such as solar energy, wind energy, and hydropower.

[0054] HJT cell (Heterojunction with Intrinsic Thin layer, heterojunction solar cell): refers to a high-efficiency solar cell that combines crystalline silicon and thin film technology;

[0055] Sintering furnace: refers to the heat treatment furnace used in the sintering and curing stage of the screen printing process during the production and preparation of new energy batteries, such as LED furnace.

[0056] The production and preparation process of new energy batteries includes screen printing process, which includes screen making, sintering and curing, and sorting and testing stages.

[0057] During the screen printing stage, a pattern is printed on the blue film using a screen, a squeegee, a slurry, and a table. The squeegee pressure squeezes the slurry, causing it to evenly penetrate the cell to create the pattern. This stage primarily involves printing the secondary grid, main grid, front and back surfaces, electrodes, and electric field.

[0058] Sintering and curing stage: Low-temperature sintering technology is used to set the process temperature. The slurry on the surface of the battery cell is dried and cured in an oven and a sintering furnace (or curing furnace) to remove the polymer binder in the wet slurry. During the drying process, the solvent evaporates and the slurry undergoes a certain shrinkage. The solid matter and the blue film are close to each other, and finally a dry electrode electric field structure is formed.

[0059] Sorting test stage: The cell test system illuminates the cell with light intensity, and contacts the cell electrodes through the probe row pressing device, injecting a fixed current into the cell. The line resistance, string resistance, fill factor, efficiency and other data of the cell under different light intensities and temperatures are calculated through the three-image line principle, and the data are fed back to the display to measure the performance of the cell. The infrared camera takes pictures and feeds back synchronously to the display to facilitate the observation of cell abnormalities. After the test is completed, it is transferred to the next station (such as a sorting machine).

[0060] Figure 1 The schematic diagram of the battery production and preparation scenario provided for this application is as follows: Figure 1 As shown, the application scenario of the embodiment of the present application includes a sintering furnace 10, which includes a furnace body 101, a conveying device 102 arranged in the furnace body 101, and an LED lamp 103, wherein the LED lamp 103 is located above the conveying device 102. The loading and unloading machine feeds the printed battery cells 20 into the sintering furnace 10 and places them on the conveying device 102. When the LED lamp 103 is working, the heat generated dries and solidifies the slurry on the surface of the battery cells 20 on the conveying device 102. Then, the conveying device 102 transfers the sintered and solidified battery cells 20 to the unloading and unloading machine, which then transfers the battery cells 20 to the next station machine, such as a sorting machine.

[0061] From the above scenario, it can be seen that during the sintering and curing process, the battery cell 20 is sintered and cured by the LED lamp tube 103. Due to the unreasonable control of the operating frequency of the LED lamp tube 103, the battery cell 20 often has adverse phenomena such as foggy blackening. This adverse phenomenon seriously affects the photoelectric conversion efficiency and appearance quality of the battery cell 20, resulting in poor battery performance and a high battery defect rate.

[0062] Based on this, the sintering furnace control method provided in this application solves the technical problem of adverse phenomena such as fogging and blackening of battery cells during the sintering and curing process by reasonably adjusting the operating frequency of the sintering furnace according to the surface changes of the battery cells during the sintering and curing process of the battery cells.

[0063] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0064] Figure 2 A schematic diagram of a sintering furnace control method provided in this application Figure 1 , optionally, applied to sintering furnace control devices, such as Figure 2 As shown, the method includes:

[0065] S201, obtaining image information of the battery cell in the sintering furnace;

[0066] In an optional implementation, Figure 3 As shown, an optical detection device 104 (e.g., a camera) is provided in the sintering furnace 10 for capturing images of the battery cells 20 in the sintering furnace 10. The optical detection device 104 transmits the captured images to the sintering furnace control device, which facilitates analysis of the image information.

[0067] In an optional implementation, the sintering furnace can heat-treat multiple battery cells at the same time, dividing them into multiple areas. A group of cameras is set up in each area to collect the battery cells in the area, so that the image information collected by the camera can clearly reflect the surface condition of each battery cell.

[0068] S202, determining surface state information of the battery cell according to the image information;

[0069] In an optional implementation, the image information includes a grayscale value of the image, and the surface state information of the battery cell can be analyzed based on the grayscale value.

[0070] In an optional implementation, the image information may further include RGB values, and the surface state information of the battery cell may be analyzed by the RGB values of the battery cell in the image.

[0071] Exemplarily, the surface state information of the battery cell reflects the surface color of the battery cell, for example, the surface is foggy and black, etc.

[0072] S203 : Adjust the current operating parameters of the sintering furnace according to the surface state information of the battery cell, so that the surface state information of the battery cell is within a preset range.

[0073] During the sintering and curing stage, the surface color of the battery cell will gradually tend to become foggy and black due to problems such as local high temperature, long local heating time, and uneven chemical reaction during the heating process. The foggy and black color of the battery cell affects the photoelectric conversion efficiency and appearance quality of the battery cell, and such battery cell is classified as a defective product.

[0074] In the embodiment of the present application, based on the standard for classifying a battery cell as a good product, the variation range of the surface state information of the battery cell is calibrated as a preset range. That is, when the surface state information of the battery cell is within the preset range, it can be determined that the surface of the battery cell does not have foggy blackening and is a good product.

[0075] In the embodiment of the present application, during the sintering and curing stage of the battery cell, the surface state information of the battery cell is controlled to be within a preset range to ensure the yield of the battery cell.

[0076] For example, since the surface state of the battery cell changes, which is related to the local temperature and local heating time, the embodiments of the present application adjust the local temperature of the battery cell by controlling the current operating parameters of the sintering furnace, or by lowering the local temperature of the battery cell to adapt to a longer heating time.

[0077] Exemplarily, the surface state information of the battery cell reflects the surface color of the battery cell, and the preset range is also a preset color range.

[0078] In an optional implementation, the current operating parameters of the sintering furnace can be adjusted in the following ways:

[0079] A1: Determine the target operating parameters of the sintering furnace based on the surface grayscale value of the battery cell;

[0080] For example, in step A1, the surface state information is taken as the surface grayscale value:

[0081] Based on the test results, a correlation between the cell surface grayscale value and the sintering furnace operating parameters is established in advance (this can be done in a table or other manner). After the cell surface grayscale value is determined using image information, the corresponding target sintering furnace operating parameters are obtained through a table lookup.

[0082] A2: Adjust the current operating parameters of the sintering furnace according to the target operating parameters.

[0083] For example, taking the operating parameter as the operating frequency, assuming that the target operating frequency is B and the current operating frequency of the sintering furnace is A, the operating frequency of the sintering furnace is adjusted to B.

[0084] In this implementation, the greater the surface grayscale value of the cell, the smaller the operating parameters of the sintering furnace.

[0085] In an optional implementation, the current operating parameters of the sintering furnace can also be adjusted in the following ways:

[0086] B1: Based on the surface grayscale value of the battery cell and the current operating parameters as input parameters, the preset operating parameter adjustment model is input. The operating parameter adjustment model reflects the correlation between the surface grayscale value of the battery cell, the current operating parameters and the target operating parameters;

[0087] B2: Based on the operating parameter adjustment model, the target operating parameters of the sintering furnace are obtained;

[0088] Exemplarily, in this implementation, a pre-trained operating parameter adjustment model is used to adjust the operating parameters of the sintering furnace. The input parameters of the operating parameter adjustment model include the grayscale value of the cell image and the current operating parameters of the sintering furnace, and the output parameters include the target operating parameters of the sintering furnace.

[0089] Optionally, the working parameter adjustment model is obtained based on a big data analysis method or a machine learning method.

[0090] B3: Adjust the current operating parameters of the sintering furnace according to the target operating parameters.

[0091] For example, taking the operating parameter as the operating frequency, assuming that the target operating frequency is B and the current operating frequency of the sintering furnace is A, the operating frequency of the sintering furnace is adjusted to B.

[0092] Furthermore, the sintering furnace control process also includes recording current adjustment operation information, including the adjustment time, current operating parameters before adjustment, and current operating parameters after adjustment (such as target operating parameters). Based on this current adjustment operation information, the operating parameter adjustment model is optimized to optimize the sintering furnace's adjustment strategy and improve sintering furnace control accuracy.

[0093] In an optional implementation, the current operating parameters of the sintering furnace can also be adjusted in the following ways:

[0094] C1: when the surface grayscale value of the battery cell is greater than or equal to the first preset threshold, or when the surface grayscale values of a first preset number of battery cells are greater than or equal to the first preset threshold, reducing the current operating frequency of the sintering furnace;

[0095] For example, in step C1, the surface state information is the surface grayscale value, and the operating parameter is the operating frequency.

[0096] Based on test results, the cell's surface grayscale value is set as the critical value for when the cell's surface is approaching a foggy blackening state, defined as a first preset threshold. When the surface grayscale value reaches the first preset threshold, it indicates a slight, localized darkening of the cell's color. During the sintering furnace control process, if the cell's surface grayscale value is identified as greater than or equal to the first preset threshold, the probability of the cell's foggy blackening occurring if the sintering furnace continues operating at the current parameters is high. Therefore, the sintering furnace's current operating frequency is controlled to decrease, minimizing the probability of foggy blackening on the cell's surface. If the surface grayscale value is less than the first preset threshold, the sintering furnace's current operating frequency is retained, or control is performed according to the preset operating frequency.

[0097] As an example, the current operating frequency of the sintering furnace can be reduced by reducing the current operating frequency of the sintering furnace to a preset operating frequency. In this implementation, the preset operating frequency is determined according to the current operating frequency. For example, if the current operating frequency is P1 (such as 50HZ), the preset operating frequency can be P2 (such as 35HZ~40HZ), that is, the current operating frequency of the sintering furnace is reduced to P2. If the current operating frequency is P3 (such as 70HZ), the preset operating frequency can be P4 (such as 55HZ~60HZ, or it can also be 45HZ~50HZ), that is, the current operating frequency of the sintering furnace is reduced to P4. It should be noted that P1 is greater than P2, and P3 is greater than P4. If the current operating frequency P1 is less than P2, the corresponding difference between P1 and P2 can be the same as or different from the difference between P3 and P4. For example, when the current operating frequency is high, the faster the battery cell tends to become foggy and black, the faster the operating frequency of the sintering furnace needs to be reduced. Therefore, the larger the adjustment value of the operating frequency of the sintering furnace, the faster the temperature in the sintering furnace can be reduced.

[0098] As an example, the sintering furnace's current operating frequency can be reduced gradually according to a preset adjustment value until the surface grayscale value falls below a first preset threshold. For example, the first adjustment value is reduced based on the current operating frequency. Then, after determining the surface grayscale value of the cell, if the surface grayscale value is still greater than or equal to the first preset threshold, the first adjustment value (or a second adjustment value, where the second adjustment value is less than the first adjustment value) is further reduced until the surface grayscale value of the cell falls below the first preset threshold. This gradual adjustment prevents the sintering furnace's operating frequency from decreasing too quickly, which could result in low operating efficiency.

[0099] Alternatively, as an example, steps A1 and A2 can be combined. When the surface grayscale value of the cell is greater than or equal to a first preset threshold, the target operating parameters of the sintering furnace are determined based on the cell's surface grayscale value, and the current operating parameters of the sintering furnace are adjusted based on the target operating parameters. In other words, in this example, when the cell's surface grayscale value reaches the first preset threshold, indicating that the cell has partially darkened, the sintering furnace's operating parameters are adjusted to prevent a decrease in the sintering furnace's operating efficiency. The method for adjusting the sintering furnace's operating parameters can be found in the detailed procedures of steps A1 and A2 above and will not be further described here.

[0100] It should be noted that multiple battery cells can be sintered simultaneously in the sintering furnace. In some instances, when the surface grayscale value of a battery cell is greater than or equal to a first preset threshold, the current operating parameters of the sintering furnace can be reduced to ensure the yield of each battery cell. Alternatively, in some examples, when it is identified that the surface grayscale value of at least a first preset number of battery cells is greater than or equal to the first preset threshold, the current operating parameters of the sintering furnace are adjusted. For example, when the surface grayscale value of 3 to 5 battery cells is greater than or equal to the first preset threshold, it indicates that the current operating parameters of the sintering furnace will cause the surface of most battery cells to become foggy and black. At this time, the current operating parameters of the sintering furnace need to be adjusted as soon as possible to ensure the yield of the battery cells.

[0101] C2: when the surface grayscale value of the battery cell is less than a second preset threshold, increasing the current operating frequency of the sintering furnace.

[0102] For example, after reducing the current operating frequency of the sintering furnace in step C1, the local temperature of the cell is lowered, reducing the probability of fogging and blackening on the cell surface. However, if the operating frequency is too low, it will also affect the cell curing effect and heat treatment efficiency. Therefore, a second preset threshold is set as another critical value to determine whether the heat treatment efficiency of the sintering furnace has decreased, and then adjust the operating frequency of the sintering furnace.

[0103] Optionally, the second preset threshold is less than or equal to the first preset threshold, and the operating frequency range of the sintering furnace is controlled in combination with the first preset threshold, so that when the sintering furnace performs heat treatment on the battery cell, it can meet the work efficiency requirements and reduce the foggy blackening phenomenon on the surface of the battery surface.

[0104] For example, the second preset threshold reflects that the surface fogging of the cell has improved. Therefore, when the surface grayscale value of the cell is less than the second preset threshold, the current operating frequency of the sintering furnace is increased to improve the operating efficiency of the sintering furnace.

[0105] In this step, the operating frequency of the sintering furnace is adjusted by fine-tuning. For example, the operating frequency of the sintering furnace is increased by 1 Hz to 2 Hz to avoid excessively high operating frequency, which would cause a rapid increase in the local temperature of the cell.

[0106] In this embodiment, continue to refer to Figure 3 A high-precision power sensor 105 is provided in the sintering furnace. The high-precision power sensor 105 detects the current working parameters of the sintering furnace, and then adjusts the working parameters of the sintering furnace based on the current working parameters.

[0107] As an example, the sintering furnace also includes a monitoring screen 106, which is used to output image information collected by the sintering furnace, or to output abnormal alarm information of the sintering furnace, such as the next workstation machine jam alarm signal or the lower-level material transfer machine abnormal shutdown alarm signal.

[0108] The sintering furnace control method provided in the embodiment of the present application obtains image information of the battery cell to identify the surface state information of the battery cell based on the image information, judges whether the surface of the battery cell has a trend of fogging and blackening, and then adaptively adjusts the working parameters of the sintering furnace to avoid the sintering furnace operating at fixed working parameters, which causes the local temperature of the battery cell to rise and cause fogging and blackening. This achieves the effect of reducing the undesirable phenomenon of fogging and blackening of the battery cell during the sintering and curing process of the battery cell, improving the battery performance and increasing the battery qualification rate.

[0109] Figure 4 Schematic diagram of the sintering furnace control method provided in this application Figure 2 ,like Figure 4 As shown, this embodiment, based on the above embodiments, describes in detail the sintering furnace control method, which includes:

[0110] S401, when receiving a jam signal from the next station machine of the sintering furnace, record the jam duration;

[0111] For example, the next station machine of the sintering furnace refers to the next stage in the battery production line where the battery cells enter after sintering is completed. For example, the next station machine of the sintering furnace is a sorting and testing system.

[0112] As an example, a sintering furnace and a sorting and testing system are connected via a lower-level unloading adapter, which transfers the cells from the sintering furnace to the sorting and testing system. If the lower-level unloading adapter stops abnormally, a jam signal is fed back to the sintering furnace. The sintering furnace receives this jam information, determines that the next station is jammed, and begins recording the jam duration.

[0113] The longer the next station machine is blocked, the longer the cell stays in the sintering furnace, the longer the cell is heated, and the greater the probability of the cell fogging. Therefore, in this embodiment, the sintering furnace operating frequency is dynamically adjusted based on the duration of the next station machine being blocked, reducing the occurrence of fogging on the cell.

[0114] S402, when the blocking duration reaches a first preset duration, reducing the operating frequency of the sintering furnace to a first operating frequency;

[0115] S403: When the blocking time reaches a second preset time, the operating frequency of the sintering furnace is reduced to a second operating frequency.

[0116] For example, based on testing, the impact of the next station's machine jam duration on the cell production is determined. A first duration, a second duration, and so on, are set, with each duration corresponding to a sintering furnace operating frequency that can reduce the cell defect rate. Therefore, when the next station's machine jams, the jam duration is recorded. When the jam duration reaches a certain preset duration, the sintering furnace operating frequency is adjusted to the frequency corresponding to the preset duration.

[0117] For example, if the jam is set to a first preset time, the corresponding sintering furnace needs to be adjusted to a first operating frequency to reduce the defective rate of the battery cells; if the jam is set to a second preset time, the corresponding sintering furnace needs to be adjusted to a second operating frequency to reduce the defective rate of the battery cells.

[0118] Therefore, during the operation of the sintering furnace, if the recorded jamming time of a station machine reaches the first preset time, the operating frequency of the sintering furnace will be reduced to the first operating frequency; if it reaches the second preset time, the operating frequency of the sintering furnace will be reduced to the second operating frequency.

[0119] Exemplarily, the first preset time is shorter than the second preset time, and the corresponding first operating frequency is higher than the second operating frequency, that is, the longer the jamming time is, the lower the corresponding operating frequency of the sintering furnace is.

[0120] For example, if the sintering furnace's operating frequency is adjusted to 70 Hz after a 2-minute blockage, the cell image information will be normal, meaning no fogging or blackening will occur on the cell surface. If the sintering furnace's operating frequency is adjusted to 50 Hz after a 4-minute blockage, the cell image information will be normal, meaning no fogging or blackening will occur on the cell surface.

[0121] In this embodiment, the operating frequency of the sintering furnace is dynamically adjusted according to the blockage condition of the next workstation machine. Compared with the operation of the sintering furnace at a fixed frequency, the surface temperature of the battery cell can be reduced when the battery cell stays for too long, thereby avoiding the battery cell sintering time in the sintering furnace being prolonged, resulting in foggy blackening, and improving the yield of the battery cell.

[0122] Figure 5 Schematic diagram of the sintering furnace control method provided in this application Figure 3 ,like Figure 5 As shown, this embodiment, based on the previous embodiment, describes in detail the sintering furnace control method, which includes:

[0123] S501, obtaining image information of the battery cell in the sintering furnace;

[0124] S502, determining surface state information of the battery cell according to the image information;

[0125] The specific implementation of steps S501 to S502 is the same as above. Figure 2S201 to S202 in the embodiment are similar, and details can be referred to the above embodiment, which will not be repeated here.

[0126] S503, determining a target adjustment value based on the surface state information of the battery cell and the jam duration of the next station machine;

[0127] In this embodiment, when the next station machine is blocked and the surface state of the battery cell tends to be foggy and black during the operation of the sintering furnace, the surface state information of the battery cell and the duration of the blockage are comprehensively considered to adjust the operating parameters of the sintering furnace, thereby improving the control accuracy of the operating parameters of the sintering furnace.

[0128] In this step, the duration of the next station's jam is recorded upon receiving a jam signal from the next station in the sintering furnace. For example, the next station in the sintering furnace refers to the next stage in the battery production line where the cells enter after sintering. For example, the next station in the sintering furnace may be a sorting and testing system.

[0129] As an example, a sintering furnace and a sorting and testing system are connected via a lower-level unloading adapter, which transfers the cells from the sintering furnace to the sorting and testing system. If the lower-level unloading adapter stops abnormally, a jam signal is fed back to the sintering furnace. The sintering furnace receives this jam information, determines that the next station is jammed, and begins recording the jam duration.

[0130] In this step, a correlation table of cell surface state information-blocking duration-operating parameter adjustment values is pre-set. After determining the cell surface state information and the blocking duration, the corresponding target adjustment value is obtained by looking up the table.

[0131] Optionally, the surface state information includes a surface grayscale value, and the operating parameters of the sintering furnace include an operating frequency. The larger the surface grayscale value and the longer the blocking time, the lower the corresponding operating frequency.

[0132] Exemplarily, determining the target adjustment value based on the surface state information of the battery cell and the jam duration of the next station machine includes:

[0133] If the surface grayscale value is greater than or equal to the first preset threshold value and the jam duration reaches the first preset duration, the first adjustment value is used as the target adjustment value;

[0134] If the surface grayscale value is greater than or equal to the first preset threshold and the jam duration reaches the second preset duration, the second adjustment value is used as the target adjustment value; wherein the first preset duration is less than the second preset duration, and the first adjustment value is less than the second adjustment value.

[0135] If the surface grayscale value is less than the second preset threshold and the jam duration reaches the first preset duration, the third adjustment value is used as the target adjustment value; wherein the first preset threshold is greater than or equal to the second preset threshold, and the third adjustment value is less than the first adjustment value.

[0136] If the surface grayscale value is less than or equal to the second preset threshold and the jam duration reaches the first preset duration, the fourth adjustment value is used as the target adjustment value; wherein the fourth adjustment value is less than the second adjustment value.

[0137] Exemplarily, if the surface grayscale value is greater than or equal to the third preset threshold, and the third preset threshold is greater than the first preset threshold, the adjustment value is further increased. That is, the larger the surface grayscale value, the larger the corresponding adjustment value, and the faster the operating frequency of the sintering furnace is reduced to avoid the surface of the battery cell quickly tending to foggy black.

[0138] S504: Adjust the current operating parameters of the sintering furnace according to the target adjustment value.

[0139] The specific implementation of step S504 is the same as above. Figure 2 S203 in the embodiment is similar, and details can be referred to the above embodiment, which will not be repeated here.

[0140] The sintering furnace control method provided in the embodiments of the present application dynamically adjusts the operating parameters of the sintering furnace by comprehensively considering the surface condition of the cell and the duration of the blockage of the next station machine, taking into account the sintering duration of the cell. This ensures that the temperature of the cell surface is balanced even during long sintering periods, avoiding the occurrence of foggy blackening caused by localized excessive temperatures, thereby improving the yield of the cell. The sintering furnace operating parameters are controlled differently for different surface conditions and / or different blockage durations, thereby improving the control accuracy of the sintering furnace and, in turn, the yield of the cell during the sintering process.

[0141] Figure 6 The schematic diagram of the structure of the sintering furnace control device provided in this application is as follows: Figure 6 As shown, the sintering furnace control device 60 provided in this embodiment includes:

[0142] An acquisition module 601 is used to acquire image information of the battery cells in the sintering furnace;

[0143] A processing module 602 is configured to determine surface state information of the cell based on the image information;

[0144] The control module 603 is used to adjust the current operating parameters of the sintering furnace according to the surface state information of the battery cell, so that the surface state information of the battery cell is within a preset range.

[0145] The sintering furnace control device provided in this embodiment can execute the method provided in the above method embodiment. Its implementation principle and technical effects are similar, and are not described in detail in this embodiment.

[0146] Figure 7 This is a schematic diagram of the structure of the electronic device provided in this application. Figure 7 As shown, the electronic device 70 provided in this embodiment includes: at least one processor 701 and a memory 702. Optionally, the device 70 further includes a communication component 703. The processor 701, the memory 702 and the communication component 703 are connected via a bus 704.

[0147] During the specific implementation process, at least one processor 701 executes the computer-executable instructions stored in the memory 702, so that the at least one processor 701 performs the above method.

[0148] The specific implementation process of the processor 701 can be found in the above method embodiment. Its implementation principle and technical effects are similar and will not be repeated here in this embodiment.

[0149] In the above embodiments, it should be understood that the processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASICs), etc. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the present invention may be directly executed by a hardware processor or by a combination of hardware and software modules within the processor.

[0150] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage.

[0151] A bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. Buses can be categorized as address buses, data buses, and control buses. For ease of illustration, the buses in the drawings of this application are not limited to just one bus or just one type of bus.

[0152] The present application also provides a computer program product, including a computer program, which implements the above method when executed by a processor.

[0153] The present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the above method is implemented.

[0154] The readable storage medium may be implemented by any type of volatile or non-volatile memory device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium may be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0155] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be an integral part of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (ASIC). Of course, the processor and the readable storage medium can also exist in the device as discrete components.

[0156] The division of units is merely a logical functional division; actual implementations may employ alternative divisions, such as combining or integrating multiple units or components into another system, or omitting or disabling certain features. Furthermore, any direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between devices or units, either through an interface, electrical, mechanical, or other means.

[0157] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0158] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0159] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the method of the present invention. The aforementioned storage medium includes various media that can store program code, such as USB flash drives, mobile hard drives, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical disks.

[0160] Those skilled in the art will appreciate that all or part of the steps in the above-described method embodiments can be implemented using hardware associated with program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0161] Finally, it should be noted that those skilled in the art will readily identify other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The present invention is not limited to the precise structure described above and illustrated in the accompanying drawings, and various modifications and variations may be made without departing from the scope thereof. The scope of the present invention is limited solely by the appended claims.

Claims

1. A sintering furnace control method, characterized in that: include: Obtain image information of battery cells in the sintering furnace; determining surface state information of the battery cell according to the image information; According to the surface state information of the battery cell, the current operating parameters of the sintering furnace are adjusted so that the surface state information of the battery cell is within a preset range.

2. The method according to claim 1, characterized in that The adjusting the current operating parameters of the sintering furnace according to the surface state information of the battery cell includes: determining target operating parameters of the sintering furnace according to a surface grayscale value of the cell, wherein the surface state information includes the surface grayscale value; The current operating parameters of the sintering furnace are adjusted according to the target operating parameters.

3. The method according to claim 2, characterized in that Determining target operating parameters of the sintering furnace according to the surface grayscale value of the cell includes: Based on the surface grayscale value of the battery cell and the current operating parameter as input parameters, the input is input into a preset operating parameter adjustment model, and the operating parameter adjustment model reflects the correlation between the surface grayscale value of the battery cell, the current operating parameter and the target operating parameter; Based on the operating parameter adjustment model, target operating parameters of the sintering furnace are obtained.

4. The method according to claim 1, wherein The adjusting the current operating parameters of the sintering furnace according to the surface state information of the battery cell includes: When the surface grayscale value of the battery cell is greater than or equal to a first preset threshold, or the surface grayscale values of a first preset number of battery cells are greater than or equal to the first preset threshold, the current operating frequency of the sintering furnace is reduced, the surface state information includes the surface grayscale value, and the operating parameters of the sintering furnace include the operating frequency.

5. The method according to claim 4, characterized in that The adjusting the current operating parameters of the sintering furnace according to the surface state information of the battery cell includes: When the surface grayscale value of the battery cell is less than or equal to a second preset threshold, or the surface grayscale values of a second preset number of battery cells are less than or equal to a second preset threshold, the current operating frequency of the sintering furnace is increased, wherein the first preset threshold is greater than or equal to the second preset threshold.

6. The method according to any one of claims 1 to 5, characterized in that The method further comprises: When receiving the jam signal of the next station machine of the sintering furnace, the jam duration is recorded; When the blocking time reaches a first preset time, reducing the operating frequency of the sintering furnace to a first operating frequency; When the blocking time reaches a second preset time, the operating frequency of the sintering furnace is reduced to a second operating frequency.

7. The method according to any one of claims 1 to 5, characterized in that The adjusting the current operating parameters of the sintering furnace according to the surface state information of the battery cell includes: Determining a target adjustment value based on the surface state information of the battery cell and the jam duration of the next station machine; The current operating parameters of the sintering furnace are adjusted according to the target adjustment value.

8. A sintering furnace control device, characterized in that: include: An acquisition module is used to acquire image information of the battery cells in the sintering furnace; a processing module, configured to determine surface state information of the cell according to the image information; The control module is used to adjust the current operating parameters of the sintering furnace according to the surface state information of the battery cell, so that the surface state information of the battery cell is within a preset range.

9. An electronic device, characterized in that: include: Memory, processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor performs the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 7 when executed by a processor.

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