A method and device for removing burrs from battery pole pieces

Abstract

The present application provides a method and device for removing burrs from a battery pole piece, and relates to the field of battery technology. The method includes: acquiring an image of the battery pole piece to obtain a pole piece image; inputting the pole piece image into a burr recognition model to obtain a recognition result output by the burr recognition model; the recognition result includes whether the battery pole piece contains burrs, and if the burrs are contained, the burr parameters corresponding to the burrs; the burr parameters are used to determine the heating parameters required to heat the pole piece to remove the burrs; if the recognition result indicates that the battery pole piece contains multiple burrs, and the multiple burrs contain a first burr whose heating parameter is greater than the parameter threshold that the battery pole piece can withstand, then the first burr is removed by a laser; a power source is connected to the battery pole piece to heat up the remaining burrs on the battery pole piece until they melt. The present application removes burrs on the pole piece by combining power-on melting and laser removal, thereby improving the qualified rate of pole piece production.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a method and device for removing burrs from a battery pole piece. Background Art

[0002] During the manufacturing process of batteries, the pole pieces need to be cut, die-cut or stacked. During the process, burrs will be formed on the surface of the pole pieces. The presence of burrs will increase the probability of short circuit or thermal runaway of the battery.

[0003] Therefore, it is necessary to process the surface of the pole piece to remove the burrs on the surface of the pole piece. However, in the process of processing the burrs on the surface of the pole piece, the existing burr processing method is to use sulfur powder to react with the burrs to achieve the purpose of removing the burrs. However, in the battery production process, there is a requirement for sulfur residue on the pole piece. If there is too much sulfur residue on the pole piece, the production requirements are not met. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a method and device for removing burrs from a battery pole piece, so as to improve the qualified rate of the pole piece while removing the burrs on the pole piece.

[0005] In a first aspect, an embodiment of the present application provides a method for removing burrs from a battery electrode, comprising:

[0006] Capturing images of battery pole pieces to obtain pole piece images;

[0007] Input the electrode image into the burr recognition model to obtain the recognition result output by the burr recognition model; the recognition result includes whether the battery electrode contains burrs, and if the burrs are contained, the burr parameters corresponding to the burrs; the burr parameters are used to determine the heating parameters for heating the electrode required to remove the burrs;

[0008] If the identification result indicates that the battery pole piece includes a plurality of burrs, and the plurality of burrs include a first burr whose heating parameter is greater than a parameter threshold that the battery pole piece can withstand, the first burr is removed by using a laser;

[0009] Connect a power source to the battery pole piece to heat up the remaining burrs on the battery pole piece until they melt.

[0010] The embodiment of the present application uses a burr recognition model to identify whether there are burrs in the pole piece image corresponding to the battery pole piece, and determines whether there are burrs that cannot be removed by high-temperature melting based on the heating parameters for removing the burrs. If so, laser removal is adopted; if the burrs can be melted by high temperature, high-temperature melting is adopted, thereby improving the qualified rate of pole piece production.

[0011] In any embodiment, removing the first burr by laser includes:

[0012] Determine the actual position of the first burr according to the position of the first burr in the pole piece image;

[0013] Based on the actual position of the first burr, the first burr is removed by a laser.

[0014] The embodiment of the present application improves the accuracy of burr removal by determining the actual position of the first burr and then removing it with a laser.

[0015] In any embodiment, the first burr is located on the ear side of the battery pole piece; the method further comprises:

[0016] If it is determined according to the identification result that the stripped side of the battery pole piece contains burrs, the stripped side of the battery pole piece is immersed in sulfur element powder, and a DC voltage is applied to the battery pole piece to remove the burrs on the stripped side.

[0017] In the embodiment of the present application, since the battery pole pieces are coated with thicker positive and negative electrode materials, the burrs on the stripped side of the battery pole pieces are relatively large. Therefore, the stripped side can be immersed in sulfur powder to remove the burrs on the stripped side. Since only the edge of the stripped side is immersed in sulfur powder, a large amount of sulfur will not remain on the pole piece, which meets the battery production process requirements.

[0018] In any embodiment, the heating parameters include a voltage value and a duration of applying a DC voltage; connecting a power source to the battery electrode to heat up the remaining burrs on the battery electrode until they melt, including:

[0019] Based on the voltage value and duration, a power source is connected to the battery electrode to heat up the remaining burrs on the battery electrode until they melt; wherein the voltage value ranges from 4V to 12V, and the duration ranges from 10 seconds to 100 seconds.

[0020] In the embodiment of the present application, the battery pole piece is energized through a heating voltage and duration that the pole piece can withstand, so that the temperature of the burrs on the pole piece increases due to the tip effect. On the basis of removing the burrs, the probability of the battery pole piece being damaged by high temperature is reduced.

[0021] In any embodiment, connecting a power source to a battery electrode includes:

[0022] Selecting a maximum heating parameter from the heating parameters corresponding to the remaining burrs;

[0023] Based on the maximum heating parameters, the corresponding DC power supply is connected to the battery electrode.

[0024] The embodiment of the present application adopts the maximum heating parameter corresponding to the remaining burrs for heating, which can, on the one hand, melt and remove the remaining burrs, and on the other hand, reduce power consumption.

[0025] In any embodiment, after removing the burrs, the method further comprises:

[0026] The battery pole piece after deburring is brushed to remove the metal residue on the surface of the battery pole piece.

[0027] The embodiment of the present application can remove metal residues on the surface of the battery pole piece after the burrs are removed by brushing, thereby improving the qualification rate of the battery production process.

[0028] In any embodiment, the method further comprises:

[0029] Capturing images of the training pole piece to obtain a training image;

[0030] Extracting burr features from a training image, and marking the burr features in the training image to obtain a label; the label is used to indicate whether the training image contains burrs, and burr parameters of the burrs;

[0031] The labeled training images are used to train the model and obtain the burr recognition model.

[0032] The embodiment of the present application can use the burr recognition model to pre-train the burr recognition model to distinguish which burrs on the electrode can be melted by high temperature and which cannot be melted by high temperature, so as to determine the removal method of each burr in a targeted manner, thereby improving the qualification rate of the battery production process on the basis of removing the burrs.

[0033] In any embodiment, the method further comprises:

[0034] The gas generated during the burr removal process is collected by the exhaust gas collection device.

[0035] The embodiment of the present application reduces the overflow of harmful gases by collecting the gases generated during the burr removal process through the exhaust gas collection device.

[0036] In a second aspect, an embodiment of the present application provides a burr removal device for a battery pole piece, the device being used to perform the burr removal method described in the first aspect; the device comprising: an image collector, a processor, a laser and a power supply; the processor is respectively connected to the image collector, the laser and the power supply;

[0037] The image collector is used to collect images of the battery pole piece, obtain the pole piece image, and send the pole piece image to the processor;

[0038] The processor is used to identify the pole piece image through a burr recognition model, obtain a recognition result, and send a first burr removal instruction to the laser and / or send a second burr removal instruction to the power supply based on the recognition result;

[0039] The laser is used to remove burrs based on a first burr removal instruction sent by the processor;

[0040] The power supply is used to energize the battery pole piece based on the second burr removal instruction sent by the processor, so that the burrs on the battery pole piece are heated up until they melt.

[0041] In any embodiment, the apparatus further comprises a debris sweeper;

[0042] The residue cleaner is used to clean the surface of the battery pole piece after the burrs are removed to remove the residue on the surface of the battery pole piece.

[0043] In a third aspect, an embodiment of the present application provides an electronic device, including: a processor, a memory, and a bus, wherein:

[0044] The processor and the memory communicate with each other via a bus;

[0045] The memory stores program instructions that can be executed by the processor, and the processor calls the program instructions to execute the method of the first aspect.

[0046] In a fourth aspect, an embodiment of the present application provides a non-transitory computer-readable storage medium, including:

[0047] The non-transitory computer-readable storage medium stores computer instructions, which cause a computer to execute the method of the first aspect.

[0048] In a fifth aspect, an embodiment of the present application provides a computer program product, comprising computer program instructions, which, when read and executed by a processor, execute the method of the first aspect.

[0049] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by practicing the embodiments of the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0051] Figure 1 A schematic flow chart of a method for removing burrs from a battery electrode provided in an embodiment of the present application;

[0052] Figure 2 A schematic diagram of a heating and melting method for removing burrs provided in an embodiment of the present application;

[0053] Figure 3 A schematic diagram of a battery electrode provided in an embodiment of the present application;

[0054] Figure 4 Another burr removal method process diagram provided in an embodiment of the present application;

[0055] Figure 5 A schematic structural diagram of a burr removal device for a battery pole piece provided in an embodiment of the present application. DETAILED DESCRIPTION

[0056] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0058] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0059] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0060] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0061] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0062] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0063] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0064] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0065] During the manufacturing process of the battery, the pole pieces need to be punched and then stacked or wound as needed so that the pole pieces can eventually be assembled into a complete battery.

[0066] In the above process, burrs are easily formed on the surface of the pole piece. When the battery cell composed of the pole piece is subsequently coated, the diaphragm is easily pierced by the burrs on the surface of the pole piece, thereby causing a short circuit in the battery cell.

[0067] Therefore, currently, the burrs on the surface of the pole piece are usually removed, for example, by placing the battery pole piece in sulfur powder and then slightly heating the battery pole piece so that the burrs can react with the sulfur powder to generate white needle-shaped crystals of inorganic compounds (aluminum trisulfide), which can be brushed off with a brush. This method will result in a large amount of sulfur remaining on the battery pole piece, which does not meet the battery production process requirements.

[0068] In order to solve this technical problem, the embodiment of the present application provides a method and device for removing burrs from a battery pole piece, which analyzes the collected battery pole piece through a burr recognition model to determine whether there are burrs on the battery pole piece that cannot be removed by high-temperature melting. If so, laser removal is used to remove them, and burrs that can be removed by high-temperature melting are still removed by high-temperature melting. By using high-temperature melting and laser instead of reacting with sulfur powder, the sulfur residue on the pole piece can be greatly reduced, and the qualified rate of the produced pole pieces can be improved.

[0069] Figure 1 A schematic flow chart of a method for removing burrs from a battery electrode provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the method includes:

[0070] Step 101: Capture an image of a battery electrode to obtain an electrode image;

[0071] Step 102: inputting the electrode image into the burr recognition model to obtain a recognition result output by the burr recognition model; the recognition result includes whether the battery electrode contains burrs, and if the burrs are contained, the burr parameters corresponding to the burrs; the burr parameters are used to determine the heating parameters for heating the electrode required to remove the burrs;

[0072] Step 103: if the identification result indicates that the battery electrode sheet includes a plurality of burrs, and the plurality of burrs include a first burr whose heating parameter is greater than a parameter threshold that the battery electrode sheet can withstand, then the first burr is removed by using a laser;

[0073] Step 104: Connect a power source to the battery electrode to heat up the remaining burrs on the battery electrode until they melt.

[0074] In the specific implementation process, the battery pole piece can be on the production line and transported by a conveyor. In the battery production process, the burr removal process can be performed after the pole piece is cut and before the pole piece is wound or stacked. An image acquisition device can be set at the workstation after the pole piece is cut and before the pole piece is wound or stacked to collect the pole piece image. The distance that the battery pole piece moves each time can be set according to the pole piece range collected by the image acquisition device. After moving the set distance, the conveyor stops conveying. At this time, the image acquisition device can capture the image of the battery pole piece to obtain the pole piece image.

[0075] The burr recognition model can be set in the image acquisition device or on the processor. If it is set in the image acquisition device, the image acquisition device analyzes the pole piece image based on the collected pole piece image using the burr recognition model to obtain the recognition result. If it is set in the processor, the image acquisition device can be connected to the processor, and the collected pole piece image is sent to the processor, and the processor analyzes the pole piece image using the burr recognition model to obtain the recognition result.

[0076] It is understandable that the burr recognition model is pre-trained and can identify whether the electrode image contains burrs, and in the case of burrs, the burr parameters corresponding to each burr. The burr parameters may include at least one of the number of pixels of the burr in the electrode image, the actual size of the burr, and the heating parameters required to remove the burr. If the burr parameters include the heating parameters required to remove the burr, the heating parameters can be obtained directly according to the burr parameters. If the burr includes the number of pixels of the burr in the electrode image or the actual size of the burr, the final heating parameters can be determined based on the correspondence between the preset number of burr pixels or the actual size and the heating parameters required to remove the burr. The heating parameters may refer to the electrical parameters that cause the burrs on the battery electrode to heat up rapidly due to the tip effect when the battery electrode is powered on, for example, it may be the power-on voltage, the power-on time, etc.

[0077] There may be multiple burrs in the electrode image, and different burrs may have different sizes. The corresponding heating parameters are also different through the power heating method. Battery electrodes have certain requirements for heating parameters. Excessive temperature and voltage will damage the electrode. Therefore, it can be determined whether the multiple burrs contain the first burr whose heating parameter is greater than the parameter threshold that the battery electrode can withstand. If it exists, a laser is used to remove it by laser removal.

[0078] For burrs that can be removed by heating parameters, a power source, specifically a DC power source, can be connected to the battery electrode, and the DC power source can be connected to the electrode ear and retained for a period of time according to the heating parameters. Figure 2 A schematic diagram of a heating and melting method for removing burrs provided in an embodiment of the present application is shown in FIG. Figure 2As shown. Due to the small cross-sectional area of ​​the burr, it heats up faster and at a higher temperature than the large surface. When the temperature reaches the melting point, a metal bead will be formed. The surface of the metal bead is relatively smooth, and the risk of puncturing the isolation membrane is low.

[0079] It should be noted that if the battery pole piece only contains burrs that can be melted by energizing the electrode plate with a power supply, then only the electrode plate needs to be energized, and there is no need to use a laser for laser removal; if the battery pole piece only contains burrs that cannot be melted by energizing the electrode plate with a power supply, then only a laser machine is used to remove the burrs. If the battery pole piece contains both burrs that can be melted by energizing the electrode plate with a power supply and burrs that cannot be melted by energizing the electrode plate with a power supply, then the first burr can be removed by a laser, and then the battery pole piece can be energized to remove the remaining burrs; it is also possible to energize the battery pole piece first to remove the burrs that can be removed by energizing, and then use a laser machine to remove the remaining burrs; it is also possible to use energizing and laser to remove the corresponding burrs at the same time.

[0080] The embodiment of the present application uses a burr recognition model to identify whether there are burrs in the electrode image corresponding to the battery electrode, and determines whether there are burrs that cannot be removed by high-temperature melting based on the heating parameters for removing the burrs. If so, laser removal is used; if the burrs can be melted by high temperature, high-temperature melting is used, thereby improving the qualified rate of electrode production. In addition, since the energy consumption of the laser is relatively large, the present application uses a combination of a laser and a method of energizing the battery electrode to remove the burrs, which can reduce energy consumption.

[0081] Based on the above embodiment, removing the first burr by using a laser includes:

[0082] Determine the actual position of the first burr according to the position of the first burr in the pole piece image;

[0083] Based on the actual position of the first burr, the first burr is removed by a laser.

[0084] In the specific implementation process, a mapping relationship between the laser and the actual position of the pole piece can be established in advance, and the actual position of the pixel point in the pole piece image on the battery pole piece can be determined based on the mapping relationship. After determining the actual position of the first burr, the position and angle of the laser are adjusted so that the laser can accurately remove the first burr.

[0085] It should be noted that the laser parameters of the laser can be fixed parameters or can be adaptively adjusted according to the size of the burr. The method of adaptively adjusting the laser parameters according to the size of the burr can reduce energy consumption while achieving the purpose of removing the burr.

[0086] The embodiment of the present application improves the accuracy of burr removal by determining the actual position of the first burr and then removing it with a laser.

[0087] Based on the above embodiment, the first burr is located on the ear side of the battery pole piece; the method further includes:

[0088] If it is determined according to the identification result that the stripped side of the battery pole piece contains burrs, the stripped side of the battery pole piece is immersed in sulfur element powder, and a DC voltage is applied to the battery pole piece to remove the burrs on the stripped side.

[0089] In the specific implementation process, Figure 3 A schematic diagram of a battery electrode provided in an embodiment of the present application, such as Figure 3 As shown, the long side where the pole ear is located is called the pole ear side, and the long side without the pole ear is called the strip side. Since the pole piece will be coated with positive electrode material or negative electrode material, the burrs on the strip side are relatively coarse. Generally, the burrs cannot be removed by heating up the battery by powering on. Since the battery pole piece is generally made of aluminum foil, the edge of the strip side of the battery pole piece can be placed in a container containing sulfur powder, and a DC voltage is applied to the battery pole piece to quickly heat up the burr part of the battery pole piece. When the increased temperature reaches the point where the burr on the battery pole piece undergoes an oxidation-reduction reaction with the sulfur powder, the burr is induced to undergo an oxidation-reduction reaction with the sulfur powder, and an inorganic compound aluminum trisulfide of white needle-shaped crystals is generated. Then, the impurities on the edge of the pole piece that have reacted are removed by scraping with an ultrasonic cleaner or a brush to achieve the purpose of eliminating the burrs, so as to avoid sharp burrs piercing the diaphragm and causing a short circuit inside the battery, and at the same time reduce the impact of the reaction products on the pole piece.

[0090] In the embodiment of the present application, since the battery pole pieces are coated with thicker positive and negative electrode materials, the burrs on the stripped side of the battery pole pieces are relatively large. Therefore, the stripped side can be immersed in sulfur powder to remove the burrs on the stripped side. Since only the edge of the stripped side is immersed in sulfur powder, a large amount of sulfur will not remain on the pole piece, which meets the battery production process requirements.

[0091] On the basis of the above embodiment, the heating parameters include the voltage value and the duration of applying the DC voltage; connecting the power supply to the battery pole piece to heat up the remaining burrs on the battery pole piece until they melt, including:

[0092] Based on the voltage value and duration, a power source is connected to the battery pole piece to heat up the remaining burrs on the battery pole piece until they melt; wherein the voltage value ranges from 4V to 12V, for example, it can be 4V, 6V, 7V, 10V, 12V, etc. The duration ranges from 10 seconds to 100 seconds, for example, it can be 10 seconds, 20 seconds, 45 seconds, 50 seconds, 80 seconds, 100 seconds, etc.

[0093] In the specific implementation process, for the heating and melting method, a DC power supply can be connected to the pole ear of the pole piece, the voltage range is 4V-12V, and the power-on time range is 10 seconds-100 seconds. The tip effect of the burr on the edge of the pole piece is used. Because the cross-sectional area of ​​the burr is small, its temperature rise is greater and the temperature is higher than that of the large surface. When the temperature reaches the melting temperature of Al (about 660°C), a metal molten bead is formed to melt the fine burrs on the side of the pole ear.

[0094] In the embodiment of the present application, the battery pole piece is energized through a heating voltage and duration that the pole piece can withstand, so that the temperature of the burrs on the pole piece increases due to the tip effect. On the basis of removing the burrs, the probability of the battery pole piece being damaged by high temperature is reduced.

[0095] On the basis of the above embodiment, a power source is connected to the battery electrode, including:

[0096] Selecting a maximum heating parameter from the heating parameters corresponding to the remaining burrs;

[0097] Based on the maximum heating parameters, the corresponding DC power supply is connected to the battery electrode.

[0098] In the specific implementation process, for the method of heating and melting to remove burrs, the maximum heating parameter required can be selected from the burrs that can be removed by heating and melting. It can be understood that the heating parameters may include voltage and duration, and then a DC power supply is connected to the tab of the battery electrode, and the voltage of the DC power supply is the voltage of the maximum heating parameter.

[0099] The embodiment of the present application adopts the maximum heating parameter corresponding to the remaining burrs for heating, which can, on the one hand, melt and remove the remaining burrs, and on the other hand, reduce power consumption.

[0100] Based on the above embodiment, after removing the burrs, the method further includes:

[0101] The battery pole piece after deburring is brushed to remove the metal residue on the surface of the battery pole piece.

[0102] Based on the above embodiments, after removing burrs by means of electric heating and melting and / or laser removal and / or reaction with sulfur elemental powder, the battery pole pieces after burr removal can be swept and brushed. Specifically, an ultrasonic cleaner or a brush can be used to wipe the surface of the battery pole pieces.

[0103] The embodiment of the present application can remove metal residues on the surface of the battery pole piece after the burrs are removed by brushing, thereby improving the qualification rate of the battery production process.

[0104] Based on the above embodiment, the method further includes:

[0105] Capturing images of the training pole piece to obtain a training image;

[0106] Extracting burr features from the training image, and marking the burr features in the training image to obtain a label; the label is used to indicate whether the training image contains burrs and burr parameters of the burrs;

[0107] The labeled training images are used to train the model and obtain the burr recognition model.

[0108] In the specific implementation process, the training electrode refers to the electrode used for model training, which may come from the production line or may be an electrode outside the production line specifically used for training the model. The training electrode is imaged to obtain a training image. After obtaining the training image, burr features can be extracted from the training image. The burr features include whether burrs are included, and if burrs are included, the burrs in the training image are marked out and burr parameters are added. The burr parameters can be the heating parameters required to remove the burrs by heating and melting them by powering on, or information such as the size of the burrs.

[0109] The training image is used as the input of the model and input into the model to be trained to obtain the prediction result of the output of the model to be trained. The loss function is calculated using the prediction result and the label corresponding to the training image. The internal parameters of the model to be trained are optimized based on the calculated loss value until a trained burr recognition model is obtained.

[0110] The embodiment of the present application can use the burr recognition model to pre-train the burr recognition model to distinguish which burrs on the electrode can be melted by high temperature and which cannot be melted by high temperature, so as to determine the removal method of each burr in a targeted manner, thereby improving the qualification rate of the battery production process on the basis of removing the burrs.

[0111] Based on the above embodiment, the method further includes:

[0112] The gas generated during the burr removal process is collected by the exhaust gas collection device.

[0113] In the specific implementation process, during the redox reaction between the burrs on the battery pole piece and the sulfur powder, gases such as H2S and SO2 will be generated. These gases will cause environmental pollution and even threaten the health of the workers. Therefore, these gases can be collected and treated by a waste gas collection device. Specifically, a balloon can be used to collect the waste gas, and then the collected waste gas can be introduced into a sodium hydroxide solution of a certain concentration for waste gas treatment.

[0114] The embodiment of the present application reduces the overflow of harmful gases by collecting the gases generated during the burr removal process through the exhaust gas collection device.

[0115] Figure 4 Another burr removal method process diagram provided in the embodiment of the present application is as follows: Figure 4 As shown. The application scenario provided by the embodiment of the present application is: for the burrs on the side of the pole ear, all of them can be removed by electric melting, and for the burrs on the strip side, they can be removed by reacting with sulfur powder. Therefore, a 4-12V DC power supply can be connected to the pole ear to heat up and melt the burrs into molten beads, see Figure 4 Then use a brush to brush the battery pole piece. For the burrs on the stripping side, see Working Space 2, place the burr part in sulfur powder, and connect a 4-12V DC power supply to the pole ear to make the burr react with the sulfur powder, and then use a brush to brush off the reactant. After the burr removal process, only molten beads are left on the battery pole piece, see Figure 4 The processed pole piece.

[0116] It should be noted that when the pole ear side contains burrs that are removed by electric melting and burrs that need to be removed by laser, a laser can be added to the working space one to remove the large burrs. Of course, a working space three can also be added. The position of the working space three can be before the working space one, between the working space one and the working space two, or after the working space two.

[0117] Figure 5 A schematic diagram of the structure of a battery pole piece burr removal device provided in an embodiment of the present application is shown in FIG. Figure 5 As shown. The device can remove burrs on the battery pole piece based on the methods provided by the above-mentioned method embodiments. The device includes: an image collector 501, a processor 502, a laser 503 and a power supply 504; the processor 502 is connected to the image collector 501, the laser 503 and the power supply 504 respectively;

[0118] The image collector 501 is used to capture images of battery pole pieces, obtain pole piece images, and send pole piece images to the processor 502; it can be understood that the image collector 501 can be an industrial camera or other types of cameras, and the embodiments of the present application do not specifically limit this.

[0119] The processor 502 is used to identify the pole piece image through a burr recognition model to obtain a recognition result, and send a first burr removal instruction to the laser 503 and / or send a second burr removal instruction to the power supply 504 based on the recognition result.

[0120] The processor 502 may be an integrated circuit chip with signal processing capabilities. The processor 502 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. It may implement or execute various methods, steps and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0121] The laser 503 is used to remove burrs based on the first burr removal instruction sent by the processor;

[0122] The power supply 504 is used to energize the battery electrode based on the second burr removal instruction sent by the processor, so as to heat up the burrs on the battery electrode until they melt.

[0123] On the basis of the above-mentioned embodiment, the device may further include a residue cleaner, which is used to clean the surface of the battery pole piece after the burrs are removed, so as to remove the residue on the surface of the battery pole piece.

[0124] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0125] In addition, the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0126] Furthermore, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0127] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0128] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for removing burrs from a battery pole piece, characterized in that: include: Capturing images of battery pole pieces to obtain pole piece images; The electrode image is input into a burr recognition model to obtain a recognition result output by the burr recognition model; the recognition result includes whether the battery electrode contains burrs, and if the burrs are contained, burr parameters corresponding to the burrs; the burr parameters are used to determine heating parameters for heating the electrode required to remove the burrs; the heating parameters refer to electrical parameters for heating the battery electrode so that the burrs on the battery electrode are heated due to the tip effect when the battery electrode is powered on; If the identification result indicates that the battery pole piece includes a plurality of burrs, and the plurality of burrs include a first burr whose heating parameter is greater than a parameter threshold that the battery pole piece can withstand, then the first burr is removed by using a laser; wherein the first burr is located on the ear side of the battery pole piece; Connecting a power source to the battery electrode piece to heat up the remaining burrs on the battery electrode piece until they melt; When the material of the battery electrode is aluminum foil, the method further comprises: If it is determined according to the identification result that the stripped side of the battery electrode contains burrs, the stripped side of the battery electrode is immersed in sulfur powder and a DC voltage is applied to the battery electrode to remove the burrs on the stripped side; the stripped side of the battery electrode refers to the long side of the battery electrode without a tab.

2. The method according to claim 1, characterized in that The step of removing the first burr by using a laser comprises: Determine the actual position of the first burr according to the position of the first burr in the pole piece image; The first burr is removed by the laser based on the actual position of the first burr.

3. The method according to claim 1, characterized in that The heating parameters include a voltage value and a duration of applying a DC voltage; the step of connecting a power source to the battery electrode to heat up the remaining burrs on the battery electrode until they melt comprises: Based on the voltage value and the duration, the power supply is connected to the battery electrode to heat up the remaining burrs on the battery electrode until they melt; wherein the voltage value ranges from 4V to 12V, and the duration ranges from 10 seconds to 100 seconds.

4. The method according to claim 1, characterized in that The step of connecting a power source to the battery electrode comprises: Selecting a maximum heating parameter from the heating parameters corresponding to the remaining burrs; Based on the maximum heating parameter, a corresponding direct current power supply is connected to the battery electrode.

5. The method according to claim 1, characterized in that After removing the burrs, the method further comprises: The battery pole piece after the burrs are removed is brushed to remove the metal residue on the surface of the battery pole piece.

6. The method according to any one of claims 1 to 5, characterized in that: The method further comprises: Capturing images of the training pole piece to obtain a training image; Extracting burr features from the training image, and marking the burr features in the training image to obtain a label; the label is used to indicate whether the training image contains burrs and burr parameters of the burrs; The labeled training images are used to perform model training to obtain the burr recognition model.

7. The method according to claim 1, characterized in that The method further comprises: The gas generated during the burr removal process is collected by the exhaust gas collection device.

8. A burr removal device for a battery pole piece, characterized in that: The device is used to perform the burr removal method according to any one of claims 1 to 7; the device comprises: an image collector, a processor, a laser and a power supply; the processor is connected to the image collector, the laser and the power supply respectively; The image collector is used to collect images of the battery pole piece, obtain a pole piece image, and send the pole piece image to the processor; The processor is used to identify the pole piece image through a burr recognition model to obtain a recognition result, and send a first burr removal instruction to the laser and / or send a second burr removal instruction to the power supply based on the recognition result; the recognition result includes whether the battery pole piece contains burrs, and in the case of containing burrs, burr parameters corresponding to the burrs; the burr parameters are used to determine the heating parameters required to heat the pole piece to remove the burrs; the heating parameters refer to the electrical parameters that are used to heat the battery pole piece by energizing the battery pole piece so that the burrs on the battery pole piece are heated due to the tip effect; The laser is used to remove burrs based on the first burr removal instruction sent by the processor; The power supply is used to energize the battery pole piece based on the second burr removal instruction sent by the processor, so that the burrs on the battery pole piece are heated up until they melt.

9. The device according to claim 8, characterized in that The device also includes a debris sweeper; The residue cleaner is used to clean the surface of the battery pole piece after the burrs are removed, so as to remove the residue on the surface of the battery pole piece.

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