Pole piece rubberizing detection system and method

Abstract

The invention discloses a pole piece rubberizing detection system and method. The system comprises an image acquisition device and a processing device, the image acquisition device is arranged corresponding to the target surface of the pole piece material belt and is used for carrying out image acquisition on the target surface of the pole piece material belt subjected to rubberizing to obtain a pole piece image; the processing device is in communication connection with the image acquisition device and is used for performing rubberizing detection on the pole piece image to obtain a rubberizing detection result; under the condition that the rubberizing detection result shows that the bonding material on the pole piece material belt does not meet the rubberizing requirement, preset operation is executed; wherein the rubberizing requirement comprises at least one of the following conditions: the position relationship between the bonding material on the pole piece material belt and the film region meets a preset position relationship, and the bonding material on the pole piece material belt does not have preset defects. By means of the mode, real-time and automatic detection of the rubberizing condition of the pole piece material belt can be achieved.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and in particular to a pole piece gluing detection system and method. Background Art

[0002] In battery manufacturing, gluing the two side edges of a pole piece strip is a key process, aiming to ensure the safety, performance, and stability of the battery.

[0003] However, currently, manual gluing detection is mostly used to detect the pole piece strip, with low gluing detection efficiency, low accuracy, and high labor costs. Summary of the Invention

[0004] This application provides at least a pole piece gluing detection system and method.

[0005] In the first aspect of this application, a pole piece gluing detection system is provided. The system includes an image acquisition device and a processing device; the image acquisition device is arranged corresponding to the target surface of the pole piece strip, and is used to acquire an image of the target surface of the pole piece strip after gluing to obtain a pole piece image, where the target surface includes at least one of the front surface and the back surface; the processing device is communicatively connected to the image acquisition device, and is used to perform gluing detection on the pole piece image to obtain a gluing detection result, where the gluing detection result indicates whether the adhesive material pasted on the pole piece strip meets the gluing requirements; and in the case where the gluing detection result indicates that the adhesive material on the pole piece strip does not meet the gluing requirements, a preset operation is performed, and the preset operation includes at least one of the following: marking the pole piece segment on the pole piece strip that does not meet the gluing requirements, controlling the gluing mechanism to stop working, and sending an alarm signal to the user; where the gluing requirements include at least one of the following: the positional relationship between the adhesive material on the pole piece strip and the film area meets a preset positional relationship, and there are no preset defects in the adhesive material on the pole piece strip, the film area is the area on the pole piece strip coated with active material, and the preset defects include at least one of a wrinkling defect and a breakage defect.

[0006] Therefore, since the image acquisition device is arranged corresponding to the target surface of the pole piece strip, the image acquisition device can acquire a pole piece image that truly reflects the gluing situation of the target surface of the pole piece strip; the processing device can perform gluing detection based on the pole piece image that can truly reflect the gluing situation of the target surface of the pole piece strip, and can accurately determine whether the adhesive material pasted on the pole piece strip meets the gluing requirements, realizing real-time and automatic detection of the gluing situation of the pole piece strip, improving the accuracy and efficiency of gluing detection, and reducing labor costs.

[0007] In addition, when the preset operation is to mark the electrode piece segments on the electrode piece strip that do not meet the gluing requirements, the electrode piece segments that do not meet the gluing requirements can be marked, ensuring that the electrode piece segments that do not meet the gluing requirements are accurately removed or reworked in subsequent processes, preventing the electrode piece segments that do not meet the gluing requirements from flowing out, thereby avoiding winding them to form a battery cell with performance problems and improving the quality of the formed battery cell. When the preset operation is to control the gluing mechanism to stop working, it is possible to avoid batch production of electrode piece strips that do not meet the gluing requirements, thereby avoiding batch scrapping or rework of the electrode piece strips. When the preset operation is to send an alarm signal to the user, it is possible to timely warn of the abnormal gluing situation, facilitating the user to timely locate and troubleshoot the abnormal gluing problem.

[0008] Among them, the gluing requirements include: the positional relationship between the adhesive material on the electrode piece strip and the film area meets a preset positional relationship; the processing device performs gluing detection on the electrode piece image to obtain a gluing detection result, including: finding a first boundary line and a second boundary line extending along the length direction of the electrode piece strip from the electrode piece image, where one of the first boundary line and the second boundary line is the boundary line of the adhesive material close to the film area, and the other is the boundary line of the film area close to the adhesive material; obtaining a first distance between the first boundary line and the second boundary line; in response to the first distance being within a preset distance range, determining that the positional relationship between the adhesive material on the electrode piece strip and the film area meets the preset positional relationship.

[0009] Therefore, one of the first boundary line and the second boundary line is the boundary line of the adhesive material close to the film area, which reflects the actual bonding position of the adhesive material and the electrode piece strip; the other of the first boundary line and the second boundary line is the boundary line of the film area close to the adhesive material, which represents the coverage range of the film area on the electrode piece strip. When the first distance between the first boundary line and the second boundary line is within the preset distance range, it indicates that the adhesive material pasted on the electrode piece strip and the film area do not overlap or have a very small part overlapping, that is, the adhesive material pasted on the electrode piece strip does not invade the film area or has a very small part invading the film area, that is, the adhesive material on the electrode piece strip is not pasted onto the film area or has a very small part pasted onto the film area, that is to say, the positional relationship between the adhesive material on the electrode piece strip and the film area meets the preset positional relationship.

[0010] Among them, the gluing requirements include: the adhesive material on the electrode piece strip does not have a preset defect; the processing device performs gluing detection on the electrode piece image to obtain a gluing detection result, including: finding a third boundary line and a fourth boundary line from the electrode piece image, where the third boundary line and the fourth boundary line are respectively two boundary lines of the glue extending along the length direction of the electrode piece strip; obtaining a second distance between the third boundary line and the fourth boundary line; in response to the second distance being not less than a preset distance threshold, determining that the adhesive material on the electrode piece strip does not have a preset defect.

[0011] Therefore, the third boundary line and the fourth boundary line are two boundary lines along which the adhesive tape extends in the length direction of the pole piece strip. Therefore, the second distance between the third boundary line and the fourth boundary line reflects the width of the adhesive material. When the second distance between the third boundary line and the fourth boundary line is not less than the preset distance threshold, it indicates that the width of the adhesive material pasted on the pole piece strip has not narrowed, that is, the adhesive material pasted on the pole piece strip has no wrinkles or edge damage, that is, the adhesive material on the pole piece strip has no preset defects.

[0012] Among them, the pole piece strip is divided into several pole piece segments along the length direction; the processing device is used to identify the image data corresponding to each pole piece segment from the pole piece image, and perform adhesive tape detection on the image data corresponding to each pole piece segment respectively to obtain the adhesive tape detection results corresponding to each pole piece segment. Among them, the adhesive tape detection result corresponding to the pole piece segment characterizes whether the adhesive material pasted on the pole piece segment meets the adhesive tape requirements.

[0013] Therefore, by performing adhesive tape detection on the image data corresponding to each pole piece segment respectively to determine whether the adhesive material pasted on each pole piece segment meets the adhesive tape requirements, the real-time and automatic detection of the adhesive tape situation of each pole piece segment is realized, the accuracy and efficiency of the adhesive tape detection are improved, and the labor cost is reduced. In addition, by performing adhesive tape detection on each pole piece segment respectively, the pole piece segments with non-compliant adhesive tape in the pole piece strip can be accurately located subsequently, ensuring that the pole piece segments that do not meet the adhesive tape requirements are accurately removed or reworked in the subsequent processes, preventing the pole piece segments that do not meet the adhesive tape requirements from flowing out, thereby avoiding the formation of a battery cell with performance problems by winding them, and improving the quality of the formed battery cell.

[0014] Among them, the processing device executes identifying the image data corresponding to each pole piece segment from the pole piece image, including: identifying the preset position points of the pole piece tape from the pole piece image, using the preset position points as the starting points, and taking the image data of every preset number of tab lengths in the pole piece image as the image data of a pole piece segment, where the pole piece segment represents the pole piece segment required for a battery cell, and the preset number is the number of tabs required for a battery cell; or, when positioning marks are used to distinguish each pole piece segment on the pole piece tape, identifying each positioning mark from the pole piece image, and taking the image data between two adjacent positioning marks as the image data of a pole piece segment; and / or, the processing device executes glue application detection on the image data corresponding to each pole piece segment respectively to obtain the glue application detection results corresponding to each pole piece segment, including: for each target surface, performing glue application detection on the image data corresponding to each pole piece segment of the target surface respectively to determine whether the bonding material on each pole piece segment on the target surface meets the glue application requirements; in response to that all target surfaces of the pole piece segment meet the glue application requirements, determining that the glue application detection result corresponding to the pole piece segment is that the bonding material on the pole piece segment meets the glue application requirements; in response to that there is a target surface of the pole piece segment that does not meet the glue application requirements, determining that the glue application detection result corresponding to the pole piece segment is that the bonding material on the pole piece segment does not meet the glue application requirements.

[0015] Therefore, since the positioning marks are used to distinguish each pole piece segment, the image data before and after the positioning marks must belong to the image data of different pole piece segments, and the image data between two positioning marks must belong to the image data of a pole piece segment; thus, the image data of each pole piece segment in the pole piece tape can be determined through the positioning marks in the pole piece image. The number of tabs required for a battery cell is determined, so the number of tab lengths along the length direction of a pole piece segment is determined; therefore, after determining the starting point, the image data of every preset number of tab lengths is the image data of a pole piece segment.

[0016] When all target surfaces of the pole piece segment meet the glue application requirements, it is considered that the bonding material on the pole piece segment meets the glue application requirements; when there is a target surface of the pole piece segment that does not meet the glue application requirements, it is considered that the bonding material on the pole piece segment does not meet the glue application requirements.

[0017] Among them, the image acquisition device is used to respectively acquire a plurality of frames of pole piece images corresponding to different positions in the length direction of the target surface of the pole piece tape during the process of the pole piece tape moving along the length direction after glue application, where the image data corresponding to each pole piece segment of the target surface is identified from the plurality of frames of pole piece images corresponding to the target surface.

[0018] Therefore, due to the limited acquisition range of the image acquisition device, the image acquisition device continuously acquires images of the pole piece tape during the movement of the pole piece tape in the length direction after gluing, so as to acquire images of different positions of the target surface of the pole piece tape in the length direction.

[0019] Among them, the preset operations include: marking the pole piece segments on the pole piece tape that do not meet the gluing requirements; the processing device is also used for sending a marking signal to the first controller when it detects that the adhesive material on the pole piece segment does not meet the gluing requirements, so that the first controller controls the marking machine to mark the pole piece segments that do not meet the gluing requirements.

[0020] Therefore, when it is determined that the adhesive material on the pole piece segment does not meet the gluing requirements, a marking signal will be sent to the first controller, so that the first controller controls the marking machine to mark the pole piece segments that do not meet the gluing requirements, thereby marking the pole piece segments that do not meet the gluing requirements, ensuring that the pole piece segments that do not meet the gluing requirements are accurately removed or reworked in subsequent processes, preventing the pole piece segments that do not meet the gluing requirements from flowing out, and further avoiding winding them to form a battery cell with performance problems, improving the quality of the formed battery cell.

[0021] Among them, the preset operations include: controlling the gluing mechanism to stop working; the processing device is also used for sending a shutdown signal to the second controller in response to detecting that the adhesive material on the pole piece tape does not meet the gluing requirements, so that the second controller controls the gluing mechanism to stop working.

[0022] Therefore, when it is determined that the adhesive material on the pole piece tape does not meet the gluing requirements, a shutdown signal will be sent to the second controller, so that the second controller controls the gluing mechanism to stop working, which can avoid batch production of pole piece tapes that do not meet the gluing requirements, thereby avoiding batch scrapping or reworking of the pole piece tapes.

[0023] Among them, the image acquisition device is set corresponding to the position of the adhesive material on the target surface of the pole piece tape.

[0024] Therefore, since the image acquisition device is set corresponding to the position of the adhesive material on the target surface of the pole piece tape, the image acquisition device can accurately focus on the position of the adhesive material on the target surface of the pole piece tape, so as to accurately acquire the pole piece image that truly reflects the gluing situation of the target surface of the pole piece tape. Subsequently, based on the pole piece image that can truly reflect the gluing situation of the target surface of the pole piece tape, gluing detection is carried out, and it can accurately determine whether the adhesive material pasted on the pole piece tape meets the gluing requirements, so as to be able to execute the preset operation in time when it is determined that the adhesive material pasted on the pole piece tape does not meet the gluing requirements.

[0025] Wherein, adhesive materials are pasted on both side edges of the positive and negative sides of the pole piece strip along the length direction. The image acquisition device includes a positive side acquisition device group and a negative side acquisition device group. The positive side acquisition device group includes two positive side acquisition devices respectively arranged corresponding to the two side edges of the positive side. The positive side acquisition device is used to acquire the pole piece image on the positive side of the pole piece strip. The negative side acquisition device group includes two negative side acquisition devices respectively arranged corresponding to the two side edges of the negative side. The negative side acquisition device is used to acquire the pole piece image on the negative side of the pole piece strip.

[0026] Therefore, since the image acquisition device is arranged corresponding to the two side edges of the positive and negative sides of the pole piece strip, the image acquisition device can accurately focus on the two side edges of the positive and negative sides of the pole piece strip, so as to accurately acquire the pole piece image that truly reflects the glue pasting situation of the two side edges of the positive and negative sides of the pole piece strip. Subsequently, based on the pole piece image that can truly reflect the glue pasting situation of the two side edges of the positive and negative sides of the pole piece strip, glue pasting detection is carried out, and it can be accurately determined whether the adhesive materials pasted on the two side edges of the positive and negative sides of the pole piece strip meet the glue pasting requirements, so as to be able to execute a preset operation in time when it is determined that the adhesive materials pasted on the two side edges of the positive and negative sides of the pole piece strip do not meet the glue pasting requirements.

[0027] Wherein, the pole piece glue pasting detection system further includes at least one of the following groups of components: an encoder, which triggers the encoder to rotate when the pole piece strip starts to move along the length direction. When the encoder rotates to a preset angle, it triggers the image acquisition device to start working; a first controller and a marking machine, the first controller is used to control the marking machine to perform marking; a second controller and a glue pasting mechanism, the glue pasting mechanism is arranged upstream of the image acquisition device, and the first controller is used to control the glue pasting mechanism to paste glue on the pole piece strip.

[0028] Therefore, the hardware architecture of the pole piece glue pasting detection system can be flexibly set.

[0029] Wherein, the processing device is further used to display and / or save the glue pasting detection result when the glue pasting detection result indicates that the adhesive material on the pole piece strip meets the glue pasting requirements.

[0030] Therefore, by displaying the glue pasting detection result of the pole piece strip in real time, the glue pasting detection result of the pole piece strip can be intuitively shown to the user, which is convenient for the user to understand the glue pasting detection result of the pole piece strip. By saving the glue pasting detection result of the pole piece strip, it can support subsequent quality traceability, problem analysis, etc.

[0031] The second aspect of the present application provides a method for detecting glue pasting on a pole piece. The method includes: obtaining a pole piece image collected from the target surface of the pole piece strip after glue pasting, where the target surface includes at least one of the front surface and the back surface; performing glue pasting detection on the pole piece image to obtain a glue pasting detection result, where the glue pasting detection result indicates whether the adhesive material pasted on the pole piece strip meets the glue pasting requirements; in the case where the glue pasting detection result indicates that the adhesive material on the pole piece strip does not meet the glue pasting requirements, performing a preset operation, and the preset operation includes at least one of the following: marking the pole piece segment on the pole piece strip that does not meet the glue pasting requirements, controlling the glue pasting mechanism to stop working, and sending an alarm signal to the user; where the glue pasting requirements include at least one of the following: the positional relationship between the adhesive material on the pole piece strip and the film area meets a preset positional relationship, and there are no preset defects in the adhesive material on the pole piece strip, the film area is the area on the pole piece strip coated with active material, and the preset defects include at least one of a wrinkling defect and a breakage defect.

[0032] Therefore, since the pole piece image is collected from the target surface of the pole piece strip after glue pasting, the pole piece image can truly reflect the glue pasting situation of the target surface of the pole piece strip; based on the pole piece image that can truly reflect the glue pasting situation of the target surface of the pole piece strip, performing glue pasting detection can accurately determine whether the adhesive material pasted on the pole piece strip meets the glue pasting requirements, realize real-time and automatic detection of the glue pasting situation of the pole piece strip, improve the accuracy and efficiency of glue pasting detection, and reduce the labor cost.

[0033] In addition, in the case where the preset operation is to mark the pole piece segment on the pole piece strip that does not meet the glue pasting requirements, the pole piece segment that does not meet the glue pasting requirements can be marked to ensure that the pole piece segment that does not meet the glue pasting requirements is accurately removed or reworked in the subsequent process, prevent the pole piece segment that does not meet the glue pasting requirements from flowing out, and thus avoid winding it to form a battery cell with performance problems, improving the quality of the formed battery cell. In the case where the preset operation is to control the glue pasting mechanism to stop working, it is possible to avoid batch production of pole piece strips that do not meet the glue pasting requirements, thereby avoiding batch scrapping or rework of the pole piece strips. In the case where the preset operation is to send an alarm signal to the user, it is possible to timely warn of the abnormal glue pasting situation, facilitating the user to timely locate and troubleshoot the abnormal glue pasting problem.

[0034] Among them, the tape sticking requirements include: the positional relationship between the bonding material on the electrode sheet strip and the film area meets a preset positional relationship; performing tape sticking detection on the electrode sheet image to obtain a tape sticking detection result, including: finding a first boundary line and a second boundary line extending along the length direction of the electrode sheet strip from the electrode sheet image, where one of the first boundary line and the second boundary line is the boundary line of the bonding material close to the film area, and the other is the boundary line of the film area close to the bonding material; obtaining a first distance between the first boundary line and the second boundary line; in response to the first distance being within a preset distance range, determining that the positional relationship between the bonding material on the electrode sheet strip and the film area meets the preset positional relationship; and / or, the tape sticking requirements include: there are no preset defects in the bonding material on the electrode sheet strip; performing tape sticking detection on the electrode sheet image to obtain a tape sticking detection result, including: finding a third boundary line and a fourth boundary line from the electrode sheet image, where the third boundary line and the fourth boundary line are respectively two boundary lines of the tape sticking extending along the length direction of the electrode sheet strip; obtaining a second distance between the third boundary line and the fourth boundary line; in response to the second distance being not less than a preset distance threshold, determining that there are no preset defects in the bonding material on the electrode sheet strip.

[0035] Therefore, one of the first boundary line and the second boundary line is the boundary line of the bonding material close to the film area, which reflects the actual fitting position of the bonding material and the electrode sheet strip; the other of the first boundary line and the second boundary line is the boundary line of the film area close to the bonding material, which represents the coverage range of the film area on the electrode sheet strip. When the first distance between the first boundary line and the second boundary line is within the preset distance range, it indicates that there is no overlap or only a very small part of the bonding material pasted on the electrode sheet strip overlaps with the film area, that is, the bonding material pasted on the electrode sheet strip does not invade the film area or only a very small part invades the film area, that is, the bonding material on the electrode sheet strip is not pasted onto the film area or only a very small part is pasted onto the film area, that is to say, the positional relationship between the bonding material on the electrode sheet strip and the film area meets the preset positional relationship.

[0036] The third boundary line and the fourth boundary line are two boundary lines of the tape sticking extending along the length direction of the electrode sheet strip. Therefore, the second distance between the third boundary line and the fourth boundary line reflects the width condition of the bonding material. When the second distance between the third boundary line and the fourth boundary line is not less than the preset distance threshold, it indicates that the width of the bonding material pasted on the electrode sheet strip has not narrowed, that is, the bonding material pasted on the electrode sheet strip is not wrinkled or damaged at the edge, that is to say, there are no preset defects in the bonding material on the electrode sheet strip.

[0037] Among them, the pole piece strip is divided into several pole piece segments along the length direction; a glue pasting detection is performed on the pole piece image to obtain a glue pasting detection result, including: identifying the image data corresponding to each pole piece segment from the pole piece image; respectively performing glue pasting detection on the image data corresponding to each pole piece segment to obtain the glue pasting detection result corresponding to each pole piece segment, where the glue pasting detection result corresponding to the pole piece segment characterizes whether the bonding material pasted on the pole piece segment meets the glue pasting requirements.

[0038] Therefore, the glue pasting detection is respectively performed on the image data corresponding to each pole piece segment to determine whether the bonding material pasted on each pole piece segment meets the glue pasting requirements, realizing the real-time and automatic detection of the glue pasting conditions of each pole piece segment, improving the accuracy and efficiency of the glue pasting detection, and reducing the labor cost. In addition, by respectively performing glue pasting detection on each pole piece segment, the pole piece segment with unqualified glue pasting in the pole piece strip can be accurately located subsequently, ensuring that the pole piece segments that do not meet the glue pasting requirements are accurately removed or reworked in the subsequent processes, preventing the pole piece segments that do not meet the glue pasting requirements from flowing out, and thus avoiding winding them to form a battery cell with performance problems and improving the quality of the formed battery cell.

[0039] Among them, identifying the image data corresponding to each pole piece segment from the pole piece image includes: identifying the preset position points of the pole piece strip from the pole piece image, using the preset position points as the starting points, and taking the image data at every preset number of pole ear lengths from the pole piece image as the image data of a pole piece segment, where the pole piece segment represents the pole piece segment required for a battery cell, and the preset number is the number of pole ears required for a battery cell; or, in the case where the pole piece strip uses positioning marks to distinguish each pole piece segment, identifying each positioning mark from the pole piece image and taking the image data between two adjacent positioning marks as the image data of a pole piece segment; and / or, respectively performing glue pasting detection on the image data corresponding to each pole piece segment to obtain the glue pasting detection result corresponding to each pole piece segment, including: for each target surface, respectively performing glue pasting detection on the image data corresponding to each pole piece segment of the target surface to determine whether the bonding material on each pole piece segment on the target surface meets the glue pasting requirements; in response to all target surfaces of the pole piece segment meeting the glue pasting requirements, determining that the glue pasting detection result corresponding to the pole piece segment is that the bonding material on the pole piece segment meets the glue pasting requirements; in response to there being a target surface of the pole piece segment that does not meet the glue pasting requirements, determining that the glue pasting detection result corresponding to the pole piece segment is that the bonding material on the pole piece segment does not meet the glue pasting requirements; and / or, the pole piece image includes a plurality of frames of pole piece images collected at different positions in the length direction of the target surface of the pole piece strip during the movement of the pole piece strip along the length direction after glue pasting, where the image data corresponding to each pole piece segment of the target surface is identified from the plurality of frames of pole piece images corresponding to the target surface.

[0040] Therefore, since the positioning marks distinguish each electrode tab segment, the image data before and after the positioning marks must belong to different electrode tab segments, and the image data between two positioning marks must belong to the image data of one electrode tab segment. Therefore, the image data of each electrode tab segment in the electrode tab strip can be determined through the positioning marks in the electrode tab image. The number of tabs required for the battery cell is determined. Therefore, the number of tab lengths along the length direction of one electrode tab segment is determined. Therefore, after determining the starting point, the image data at every preset number of tab lengths is the image data of one electrode tab segment.

[0041] When all target surfaces of the electrode tab segment meet the adhesive application requirements, it is considered that the adhesive material on the electrode tab segment meets the adhesive application requirements; when there is a target surface of the electrode tab segment that does not meet the adhesive application requirements, it is considered that the adhesive material on the electrode tab segment does not meet the adhesive application requirements.

[0042] Since the acquisition range of the image acquisition device is limited, the image acquisition device continuously acquires images of the electrode tab strip during the process of moving along the length direction of the electrode tab strip after adhesive application, so as to acquire images of different positions of the target surface of the electrode tab strip in the length direction.

[0043] In the above technical solution, since the image acquisition device is set corresponding to the target surface of the electrode tab strip, the image acquisition device can acquire an electrode tab image that truly reflects the adhesive application situation of the target surface of the electrode tab strip. The processing device can perform adhesive application detection based on the electrode tab image that can truly reflect the adhesive application situation of the target surface of the electrode tab strip, and can accurately determine whether the adhesive material pasted on the electrode tab strip meets the adhesive application requirements, realizing real-time and automatic detection of the adhesive application situation of the electrode tab strip, improving the accuracy and efficiency of adhesive application detection, and reducing labor costs.

[0044] In addition, when the preset operation is to mark the electrode tab segments of the electrode tab strip that do not meet the adhesive application requirements, the electrode tab segments that do not meet the adhesive application requirements can be marked to ensure that the electrode tab segments that do not meet the adhesive application requirements are accurately removed or reworked in subsequent processes, preventing the electrode tab segments that do not meet the adhesive application requirements from flowing out, thereby avoiding winding them to form a battery cell with performance problems and improving the quality of the formed battery cell. When the preset operation is to control the adhesive application mechanism to stop working, it is possible to avoid batch production of electrode tab strips that do not meet the adhesive application requirements, thereby avoiding batch scrapping or rework of the electrode tab strips. When the preset operation is to send an alarm signal to the user, it is possible to timely warn of abnormal adhesive application, facilitating the user to locate and troubleshoot abnormal adhesive application problems in a timely manner. Description of the Drawings

[0045] Figure 1 is a schematic structural diagram of an embodiment of the electrode tab adhesive application detection system provided by the present application; Figure 2It is a schematic structural diagram of another embodiment of the pole piece gluing detection system provided by this application; Figure 3 It is a schematic diagram of an embodiment of the positional relationship between the bonding material and the film area provided by this application; Figure 4 It is a schematic diagram of another embodiment of the positional relationship between the bonding material and the film area provided by this application; Figure 5 It is a schematic diagram of another embodiment of the positional relationship between the bonding material and the film area provided by this application; Figure 6 It is a schematic diagram of an embodiment of each pole piece segment in the pole piece strip provided by this application; Figure 7 It is a schematic flowchart of an embodiment of the pole piece gluing detection method provided by this application; Figure 8 It is Figure 7 A schematic flowchart of an embodiment of step S72 shown; Figure 9 It is Figure 7 A schematic flowchart of another embodiment of step S72 shown; Figure 10 It is Figure 7 A schematic flowchart of another embodiment of step S72 shown; Figure 11 It is Figure 10 A schematic flowchart of an embodiment of step S102 shown; Figure 12 It is a schematic structural diagram of an embodiment of the pole piece gluing detection device provided by this application. Detailed implementation manners

[0046] Next, the technical solutions in the embodiments of this application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0047] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of this application, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0048] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0049] To better understand the present application, the pole piece adhesive detection system and the pole piece adhesive method provided by the present application will be described in more detail below with reference to the drawings and specific embodiments.

[0050] Please refer to Figure 1 and Figure 2 , Figure 1 which is a schematic structural diagram of an embodiment of the pole piece adhesive detection system provided by the present application. Figure 2 which is a schematic structural diagram of another embodiment of the pole piece adhesive detection system provided by the present application. The pole piece adhesive detection system 10 includes an image acquisition device 11 and a processing device 12, and the image acquisition device 11 and the processing device 12 are communicatively connected.

[0051] The image acquisition device 11 is arranged corresponding to the target surface of the pole piece tape 20, and is used to acquire an image of the target surface of the pole piece tape 20 after gluing to obtain a pole piece image. Since the image acquisition device 11 is arranged corresponding to the target surface of the pole piece tape 20, the image acquisition device 11 can acquire a pole piece image that truly reflects the gluing condition of the target surface of the pole piece tape 20. Subsequently, based on the pole piece image that can truly reflect the gluing condition of the target surface of the pole piece tape 20, glue application detection is performed, and it can be accurately determined whether the adhesive material pasted on the pole piece tape 20 meets the glue application requirements, so as to be able to perform a preset operation in a timely manner when it is determined that the adhesive material pasted on the pole piece tape 20 does not meet the glue application requirements.

[0052] Among them, the target surface includes at least one of the front surface and the back surface. When the target surface includes the front surface or the back surface, the image acquisition device 11 can acquire a pole piece image that truly reflects the gluing condition of the front surface or the back surface of the pole piece tape 20. Subsequently, based on the pole piece image that can truly reflect the gluing condition of the front surface or the back surface of the pole piece tape 20, glue application detection is performed, and it can accurately determine whether the bonding material pasted on the front surface or the back surface of the pole piece tape 20 meets the glue application requirements, so that when it is determined that the bonding material pasted on the front surface or the back surface of the pole piece tape 20 does not meet the glue application requirements, a preset operation can be executed in a timely manner. When the target surface includes both the front surface and the back surface, the image acquisition device 11 can acquire a pole piece image that truly reflects the gluing conditions of both the front surface and the back surface of the pole piece tape 20. Subsequently, based on the pole piece image that can truly reflect the gluing conditions of both the front surface and the back surface of the pole piece tape 20, glue application detection is performed, and it can accurately determine whether the bonding materials pasted on the front surface and the back surface of the pole piece tape 20 meet the glue application requirements, so as to perform a more comprehensive detection of the gluing condition of the pole piece tape 20. Subsequently, when it is determined that the bonding materials pasted on the front surface and the back surface of the pole piece tape 20 do not meet the glue application requirements, a preset operation can be executed in a timely manner.

[0053] The processing device 12 is used to perform glue application detection on the pole piece image to obtain a glue application detection result, where the glue application detection result characterizes whether the bonding material pasted on the pole piece tape 20 meets the glue application requirements. The processing device 12 is used to perform glue application detection on the pole piece image to determine whether the bonding material pasted on the pole piece tape 20 meets the glue application requirements, realizing real-time and automatic detection of the glue application condition of the pole piece tape 20. Compared with manual glue application detection, the accuracy and efficiency of glue application detection are improved, and the labor cost is reduced.

[0054] In addition, the processing device 12 is further used to execute a preset operation when the glue application detection result characterizes that the bonding material on the pole piece tape 20 does not meet the glue application requirements, where the preset operation includes at least one of the following: marking the pole piece segment on the pole piece tape 20 that does not meet the glue application requirements, controlling the glue application mechanism to stop working, and sending an alarm signal to the user.

[0055] If the bonding material on the pole piece tape 20 does not meet the glue application requirements, it will have a certain impact on the capacity of the battery cell formed by winding the pole piece tape 20, etc. In addition, if the bonding material on the pole piece tape 20 does not meet the glue application requirements, there may be problems such as aluminum foil leakage on the pole piece tape 20, resulting in risks such as low voltage and short circuit in the battery cell formed by winding the pole piece tape 20. That is, if the bonding material on the pole piece tape 20 does not meet the glue application requirements, it will affect the performance of the battery cell formed by winding the pole piece tape 20 and reduce the quality of the formed battery cell.

[0056] When the preset operation is to mark the pole piece segments on the pole piece strip 20 that do not meet the gluing requirements, it is possible to mark the pole piece segments that do not meet the gluing requirements, ensuring that the pole piece segments that do not meet the gluing requirements are accurately removed or reworked in subsequent processes, preventing the pole piece segments that do not meet the gluing requirements from flowing out, thereby avoiding using them to wind and form a battery cell with performance problems and improving the quality of the formed battery cell. When the preset operation is to control the gluing mechanism to stop working, it is possible to avoid batch production of pole piece strips 20 that do not meet the gluing requirements, thereby avoiding batch scrapping or reworking of the pole piece strips 20. When the preset operation is to send an alarm signal to the user, it is possible to timely warn of abnormal gluing, facilitating the user to timely locate and troubleshoot the abnormal gluing problem.

[0057] Among them, the bonding material can be adhesive tape, hot melt adhesive, UV curable adhesive, liquid epoxy resin, PI adhesive film, etc., which are not limited here and can be specifically set according to actual usage needs.

[0058] Among them, the gluing requirements include at least one of the following: the positional relationship between the bonding material on the pole piece strip 20 and the film area meets the preset positional relationship, the bonding material on the pole piece strip 20 does not have a preset defect, the film area is the area on the pole piece strip 20 coated with active material, and the preset defect includes at least one of a wrinkling defect and a breakage defect.

[0059] The gluing requirements include that the positional relationship between the bonding material on the pole piece strip 20 and the film area meets the preset positional relationship. If the positional relationship between the bonding material on the pole piece strip 20 and the film area does not meet the preset positional relationship, it means that the bonding material on the pole piece strip 20 is pasted deviating from the expected position, or rather, all or a large part of the bonding material on the pole piece strip 20 invades the film area, that is, all or a large part of the bonding material on the pole piece strip 20 is pasted onto the film area. And if all or a large part of the bonding material on the pole piece strip 20 is pasted onto the film area, it will have a certain impact on the capacity of the battery cell formed by winding the pole piece strip 20, etc. Therefore, if the positional relationship between the bonding material on the pole piece strip 20 and the film area does not meet the preset positional relationship, the bonding material pasted on the pole piece strip 20 does not meet the gluing requirements.

[0060] The gluing requirements include that the bonding material on the pole piece strip 20 does not have a preset defect, and the preset defect includes at least one of a wrinkling defect and a breakage defect. If the bonding material on the pole piece strip 20 has a preset defect, the pole piece strip 20 may leak aluminum foil, resulting in risks such as low voltage and short circuit in the battery cell formed by winding the pole piece strip 20. Therefore, if the bonding material on the pole piece strip 20 has a preset defect, the bonding material pasted on the pole piece strip 20 does not meet the gluing requirements.

[0061] Among them, the breakage defect can be an edge breakage defect or a non-edge breakage defect, which is not limited herein.

[0062] In a specific embodiment, the tape sticking requirements include: the positional relationship between the adhesive material on the electrode sheet strip 20 and the film area satisfies a preset positional relationship; the processing device 12 performs tape sticking detection on the electrode sheet image to obtain a tape sticking detection result, including: finding a first boundary line and a second boundary line extending along the length direction of the electrode sheet strip 20 from the electrode sheet image, where one of the first boundary line and the second boundary line is the boundary line of the adhesive material close to the film area, and the other is the boundary line of the film area close to the adhesive material; obtaining a first distance between the first boundary line and the second boundary line; and in response to the first distance being within a preset distance range, determining that the positional relationship between the adhesive material on the electrode sheet strip 20 and the film area satisfies the preset positional relationship.

[0063] One of the first boundary line and the second boundary line is the boundary line of the adhesive material close to the film area, which reflects the actual fitting position of the adhesive material and the electrode sheet strip 20; the other of the first boundary line and the second boundary line is the boundary line of the film area close to the adhesive material, which represents the coverage range of the film area on the electrode sheet strip 20. When the first distance between the first boundary line and the second boundary line is within the preset distance range, it indicates that the adhesive material pasted on the electrode sheet strip 20 and the film area do not overlap or have a very small part overlapping, that is, the adhesive material pasted on the electrode sheet strip 20 does not invade the film area or has a very small part invading the film area, that is, the adhesive material on the electrode sheet strip 20 is not pasted onto the film area or has a very small part pasted onto the film area, that is to say, the positional relationship between the adhesive material on the electrode sheet strip 20 and the film area satisfies the preset positional relationship. On the contrary, when the first distance between the first boundary line and the second boundary line is not within the preset distance range, it indicates that the adhesive material pasted on the electrode sheet strip 20 and the film area completely overlap or have a large part overlapping, that is, the adhesive material pasted on the electrode sheet strip 20 completely invades the film area or has a large part invading the film area, that is, the adhesive material on the electrode sheet strip 20 is completely pasted onto the film area or has a large part pasted onto the film area, that is to say, the positional relationship between the adhesive material on the electrode sheet strip 20 and the film area does not satisfy the preset positional relationship.

[0064] It should be noted that when the first distance between the first boundary line and the second boundary line is within the preset distance range, at some first distances, a very small part of the adhesive material pasted on the pole piece tape 20 may overlap with the film area, that is, a very small part of the adhesive material on the pole piece tape 20 is pasted onto the film area. However, due to the small first distance, the part of the adhesive material on the pole piece tape 20 pasted onto the film area is relatively small, so it will not affect the performance of the battery cell formed by winding the pole piece tape 20. Therefore, at these first distances, the positional relationship between the adhesive material on the pole piece tape 20 and the film area is still considered to meet the preset positional relationship, that is, the adhesive material on the pole piece tape 20 is still considered to meet the tape sticking requirements.

[0065] Among them, the size of the preset distance range is not limited and can be specifically set according to actual usage needs. For example, the preset distance range is 0.4mm ± 0.3mm.

[0066] For example, as Figure 3 shown, Figure 3 is a schematic diagram of an embodiment of the positional relationship between the adhesive material and the film area provided by this application. Taking the adhesive material as the adhesive tape, the first boundary line as the boundary line of the adhesive material close to the film area, and the second boundary line as the boundary line of the film area close to the adhesive material as an example: the position of the adhesive material on the target surface of the pole piece tape 20 is at one side edge of the pole piece tape 20, and there is a cathode AT11 on the pole piece tape 20; obtain the first distance ab between the first boundary line a and the second boundary line b. If the first distance ab is within the preset distance range, it is determined that the positional relationship between the adhesive material on the pole piece tape 20 and the film area meets the preset positional relationship. Otherwise, it is determined that the positional relationship between the adhesive material on the pole piece tape 20 and the film area does not meet the preset positional relationship.

[0067] It should be noted that AT11 plays an insulating role and can improve the cycle life, charge and discharge efficiency, or thermal stability, etc. of the battery cell formed by winding the pole piece tape 20. Among them, AT11 can be a polymer insulating film, a ceramic coating, etc. The material of the polymer insulating film can be polypropylene (PP), polyethylene (PE), polyimide (PI), etc., and the material of the ceramic coating can be nano-ceramic slurries such as Al2O3, SiO2, MgO, etc.

[0068] Another example, as Figure 4 shown, Figure 4FIG. 0 is a schematic diagram of another embodiment of the positional relationship between the adhesive material and the film region provided in the present application. Taking the adhesive material as adhesive tape, the first boundary line as the boundary line of the adhesive material close to the film region, and the second boundary line as the boundary line of the film region close to the adhesive material as an example: The position of the adhesive material on the target surface of the electrode strip 20 is at one side edge of the electrode strip 20. There is no cathode AT11 on the electrode strip 20, and the gravure of the electrode strip 20 is not exposed. Obtain the first distance ab between the first boundary line b and the second boundary line a. If the first distance ab is within the preset distance range, it is determined that the positional relationship between the adhesive material and the film region on the electrode strip 20 meets the preset positional relationship; otherwise, it is determined that the positional relationship between the adhesive material and the film region on the electrode strip 20 does not meet the preset positional relationship.

[0069] For another example, as Figure 5 shown, Figure 5 FIG. 7 is a schematic diagram of another embodiment of the positional relationship between the adhesive material and the film region provided in the present application. Taking the adhesive material as adhesive tape, the first boundary line as the boundary line of the adhesive material close to the film region, and the second boundary line as the boundary line of the film region close to the adhesive material as an example: The position of the adhesive material on the target surface of the electrode strip 20 is at one side edge of the electrode strip 20. There is no cathode AT11 on the electrode strip 20, and the gravure of the electrode strip 20 is exposed. Obtain the first distance ab between the first boundary line b and the second boundary line a. If the first distance ab is within the preset distance range, it is determined that the positional relationship between the adhesive material and the film region on the electrode strip 20 meets the preset positional relationship; otherwise, it is determined that the positional relationship between the adhesive material and the film region on the electrode strip 20 does not meet the preset positional relationship.

[0070] In a specific embodiment, the requirements for applying the adhesive include: There is no preset defect in the adhesive material on the electrode strip 20. The processing device 12 performs adhesive application detection on the electrode image to obtain an adhesive application detection result, including: finding the third boundary line and the fourth boundary line from the electrode image, where the third boundary line and the fourth boundary line are respectively two boundary lines along which the adhesive extends in the length direction of the electrode strip 20. Obtain the second distance between the third boundary line and the fourth boundary line. In response to the second distance being not less than the preset distance threshold, it is determined that there is no preset defect in the adhesive material on the electrode strip 20.

[0071] The third boundary line and the fourth boundary line are two boundary lines along which the adhesive tape extends in the length direction of the electrode strip 20. Therefore, the second distance between the third boundary line and the fourth boundary line reflects the width of the adhesive material. When the second distance between the third boundary line and the fourth boundary line is not less than the preset distance threshold, it indicates that the width of the adhesive material pasted on the electrode strip 20 has not narrowed, that is, the adhesive material pasted on the electrode strip 20 is not wrinkled or damaged at the edge, that is to say, the adhesive material on the electrode strip 20 does not have the preset defect. On the contrary, when the second distance between the third boundary line and the fourth boundary line is less than the preset distance threshold, it indicates that the width of the adhesive material pasted on the electrode strip 20 has narrowed, that is, the adhesive material pasted on the electrode strip 20 is wrinkled or damaged at the edge, that is to say, the adhesive material on the electrode strip 20 has the preset defect.

[0072] Among them, the size of the preset distance threshold is not limited and can be specifically set according to actual use needs.

[0073] For example, as Figure 3 shown, taking the adhesive material as adhesive tape: the position of the adhesive material on the target surface of the electrode strip 20 is one side edge of the electrode strip 20, and the cathode AT11 exists on the electrode strip 20; obtain the second distance ac between the third boundary line a and the fourth boundary line c. If the second distance ac is not less than the preset distance threshold, it is determined that the adhesive material on the electrode strip 20 does not have the preset defect, otherwise, it is determined that the adhesive material on the electrode strip 20 has the preset defect.

[0074] In other specific embodiments, it may also be that the processing device 12 uses a defect detection algorithm or a defect detection model to detect defects in the electrode image to determine whether the adhesive material on the electrode strip 20 has the preset defect.

[0075] In a specific embodiment, the adhesive tape requirements include: the adhesive material on the electrode strip 20 does not have the preset defect, and the preset defect includes non-edge damage defects. The processing device 12 performs adhesive tape detection on the electrode image to obtain an adhesive tape detection result, including: detecting non-edge damage defects in the electrode image to determine whether the adhesive material on the electrode strip 20 has non-edge damage defects.

[0076] In a specific embodiment, the following steps are specifically used to find the boundary line from the pole piece image: Step 1: Preprocess the pole piece image. Step 2: Boundary line enhancement processing: Calculate the first-order derivative in the X / Y directions respectively to enhance the boundary line gradient information; adopt the adaptive threshold method to eliminate the influence of uneven illumination; perform a closing operation (first dilation and then erosion) with a 3×3 rectangular kernel to connect the broken boundary lines. Step 3: Boundary line extraction: Set the double threshold to (50, 150), and use hysteresis threshold processing to eliminate false boundary lines; perform quadratic interpolation calculation based on the gradient direction, and the edge positioning accuracy reaches 0.1 pixel level; use the Douglas-Peucker algorithm to simplify the polygon vertices and reduce the sawtooth phenomenon. Step 4: Geometric parameter calculation: Perform regression analysis on the discrete boundary point set and calculate the boundary line equation.

[0077] In one embodiment, the pole piece tape 20 is divided into a plurality of pole piece segments along the length direction; the processing device 12 is used to identify the image data corresponding to each pole piece segment from the pole piece image, and respectively perform glue sticking detection on the image data corresponding to each pole piece segment to obtain the glue sticking detection results corresponding to each pole piece segment, wherein the glue sticking detection result corresponding to the pole piece segment characterizes whether the adhesive material pasted on the pole piece segment meets the glue sticking requirements.

[0078] A pole piece segment is used to wind a battery cell, and the pole piece tape 20 includes a plurality of pole piece segments for winding a battery cell along the length direction. The glue sticking detection of each pole piece segment of the pole piece tape 20 after glue sticking is also carried out sequentially and continuously. Since the glue sticking detection of each pole piece segment of the pole piece tape 20 after glue sticking is carried out sequentially and continuously, the image acquisition of each pole piece segment of the pole piece tape 20 after glue sticking is carried out sequentially and continuously. Therefore, it is necessary to identify the image data corresponding to each pole piece segment from the pole piece image to facilitate the subsequent glue sticking detection of each pole piece segment respectively. The glue sticking detection is respectively carried out on the image data corresponding to each pole piece segment to determine whether the adhesive material pasted on each pole piece segment meets the glue sticking requirements, so as to realize the real-time and automatic detection of the glue sticking conditions of each pole piece segment. Compared with manual glue sticking detection, the accuracy and efficiency of the glue sticking detection are improved, and the labor cost is reduced. In addition, by respectively performing glue sticking detection on each pole piece segment, the pole piece segment with unqualified glue sticking in the pole piece tape 20 can be accurately located subsequently, ensuring that the pole piece segments that do not meet the glue sticking requirements are accurately removed or reworked in the subsequent processes, preventing the pole piece segments that do not meet the glue sticking requirements from flowing out, thereby avoiding winding a battery cell with performance problems using them and improving the quality of the formed battery cell.

[0079] In a specific embodiment, the processing device 12 executes to identify the image data corresponding to each pole piece segment from the pole piece image, including: identifying a preset position point of the pole piece strip 20 from the pole piece image, using the preset position point as a starting point, and taking the image data of every preset number of tab lengths from the pole piece image as the image data of a pole piece segment, where the pole piece segment represents the pole piece segment required for one battery cell, and the preset number is the number of tabs required for one battery cell; or, in the case where the pole piece strip 20 uses positioning marks to distinguish each pole piece segment, identifying each positioning mark from the pole piece image, and taking the image data between two adjacent positioning marks as the image data of a pole piece segment.

[0080] The positioning marks are used to distinguish each pole piece segment. Then, the image data before and after the positioning marks must belong to the image data of different pole piece segments, and the image data between two positioning marks must belong to the image data of a pole piece segment. Therefore, the image data of each pole piece segment in the pole piece strip 20 can be determined through the positioning marks in the pole piece image. The number of tabs required for a battery cell is determined. Therefore, the number of tab lengths along the length direction of a pole piece segment is determined. Therefore, after determining the starting point, the image data of every preset number of tab lengths is the image data of a pole piece segment. It should be noted that the image data of a pole piece segment can be multiple or one, which mainly depends on the acquisition range of the image acquisition device 11 for image acquisition.

[0081] Among them, the positioning mark can be a mark hole. In addition, it should be noted that the tab length can be the distance between two adjacent tabs, and the preset position point can be a mark hole on the pole piece strip 20.

[0082] For example, as Figure 6 shown, Figure 6 is a schematic diagram of an embodiment of each pole piece segment in the pole piece strip provided by the present application. After the pole piece strip 20 with adhesive is moved from left to right along the length direction, using the preset position point as the starting point, the image data of every 3 tab lengths from the pole piece image is used as the image data of a pole piece segment EA. That is, the image data of every tab length X1, tab length X2, and tab length X3 is used as the image data of a pole piece segment EA.

[0083] It should be noted that if it is necessary to perform adhesive detection on the front and back of a pole piece segment in the pole piece strip 20 with adhesive, on the one hand, it is necessary to identify the front image data of the pole piece segment from the pole piece image collected from the front of the pole piece strip 20, and on the other hand, it is necessary to identify the back image data of the pole piece segment from the pole piece image collected from the back of the pole piece strip 20.

[0084] In a specific embodiment, the processing device 12 performs glue application detection on the image data corresponding to each electrode piece segment respectively to obtain the glue application detection results corresponding to each electrode piece segment, including: for each target surface, performing glue application detection on the image data corresponding to each electrode piece segment of the target surface respectively to determine whether the bonding material of each electrode piece segment on the target surface meets the glue application requirements; in response to each target surface of the electrode piece segment meeting the glue application requirements, determining that the glue application detection result corresponding to the electrode piece segment is that the bonding material on the electrode piece segment meets the glue application requirements; in response to there being a target surface of the electrode piece segment that does not meet the glue application requirements, determining that the glue application detection result corresponding to the electrode piece segment is that the bonding material on the electrode piece segment does not meet the glue application requirements. That is to say, when each target surface of the electrode piece segment meets the glue application requirements, it is considered that the bonding material on the electrode piece segment meets the glue application requirements; when there is a target surface of the electrode piece segment that does not meet the glue application requirements, it is considered that the bonding material on the electrode piece segment does not meet the glue application requirements.

[0085] In a specific embodiment, the image acquisition device 11 is used to respectively acquire a plurality of frames of electrode images corresponding to different positions in the length direction of the target surface of the electrode strip 20 during the process of the electrode strip 20 after glue application moving in the length direction, wherein the image data corresponding to each electrode piece segment of the target surface is recognized from a plurality of frames of electrode images corresponding to the target surface.

[0086] Since the acquisition range of the image acquisition device 11 is limited, the image acquisition device 11 continuously acquires images of the electrode strip 20 during the process of the electrode strip 20 after glue application moving in the length direction to acquire images of the target surface of the electrode strip 20 at different positions in the length direction. Since a plurality of frames of electrode images corresponding to different positions in the length direction of the target surface of the electrode strip 20 are respectively acquired during the process of the electrode strip 20 after glue application moving in the length direction, the image data corresponding to each electrode piece segment of the target surface must be recognized from a plurality of frames of electrode images corresponding to the target surface.

[0087] In a specific embodiment, the preset operation includes: marking the electrode segments on the electrode material strip 20 that do not meet the glue requirements; the processing device 12 is also used to send a marking signal to the first controller when it is detected that the adhesive material on the electrode segment does not meet the glue requirements, so that the first controller controls the marking machine to mark the electrode segments that do not meet the glue requirements. That is to say, when it is determined that the adhesive material on the electrode segment does not meet the glue requirements, a marking signal will be sent to the first controller so that the first controller controls the marking machine to mark the electrode segments that do not meet the glue requirements, thereby marking the electrode segments that do not meet the glue requirements, ensuring that the electrode segments that do not meet the glue requirements are accurately removed or reworked in subsequent processes, preventing the electrode segments that do not meet the glue requirements from flowing out, and thereby avoiding using them to wind up to form battery cells with performance problems, thereby improving the quality of the formed battery cells.

[0088] In addition, the processing device 12 can also be used to display and / or save the glue detection results when it is detected that the adhesive material on the pole piece segment meets the glue requirements. By displaying the glue detection results of the pole piece segment in real time, the glue detection results of the pole piece segment can be intuitively displayed to the user, so that the user can understand the glue detection results of the pole piece segment. By saving the glue detection results, subsequent quality tracing, problem analysis, etc. can be supported. Of course, the processing device 12 can also be used to display and / or save the glue detection results when it is detected that the adhesive material on the pole piece segment does not meet the glue requirements.

[0089] In other specific embodiments, the preset operation includes: marking the pole piece segments on the pole piece strip 20 that do not meet the gluing requirements; the marking machine may also be in the process of performing marking operations all the time, and the processing device 12 may also be used to send a stop marking signal to the first controller when it is detected that the adhesive material on the pole piece segments meets the gluing requirements, so that the first controller controls the marking machine not to mark the pole piece segments that meet the gluing requirements. When it is detected that the adhesive material on the pole piece segments does not meet the gluing requirements, no signal is sent to the first controller, so that the first controller controls the marking machine to mark the pole piece segments that do not meet the gluing requirements.

[0090] In one embodiment, the preset operation includes: controlling the gluing mechanism to stop working; the processing device 12 is also used to send a stop signal to the second controller in response to detecting that the adhesive material on the pole piece strip 20 does not meet the gluing requirements, so that the second controller controls the gluing mechanism to stop working. That is to say, when it is determined that the adhesive material on the pole piece strip 20 does not meet the gluing requirements, a stop signal will be sent to the second controller, so that the second controller controls the gluing mechanism to stop working, which can avoid mass production of pole piece strips 20 that do not meet the gluing requirements, thereby avoiding the pole piece strips 20 from being scrapped or reworked in batches.

[0091] In a specific embodiment, the pole piece strip 20 is divided into a plurality of pole piece segments along the length direction. The processing device 12 is further configured to send a stop signal to the second controller when it detects that the adhesive material on the pole piece segment does not meet the adhesive application requirements, so that the second controller controls the adhesive application mechanism to stop working. That is to say, when it is determined that the adhesive material on the pole piece segment does not meet the adhesive application requirements, a stop signal will be sent to the second controller, so that the second controller controls the adhesive application mechanism to stop working, which can avoid mass-producing pole piece segments that do not meet the adhesive application requirements, thereby avoiding mass scrapping or rework of the pole piece segments.

[0092] In one embodiment, the processing device 12 is further configured to display and / or save the adhesive application detection result when the adhesive application detection result indicates that the adhesive material on the pole piece strip 20 meets the adhesive application requirements. By displaying the adhesive application detection result of the pole piece strip 20 in real time, the adhesive application detection result of the pole piece strip 20 can be intuitively shown to the user, which is convenient for the user to understand the adhesive application detection result of the pole piece strip 20. By saving the adhesive application detection result of the pole piece strip 20, it can support subsequent quality traceability, problem analysis, etc. Of course, in other embodiments, the processing device 12 can also be configured to display and / or save the adhesive application detection result when the adhesive application detection result indicates that the adhesive material on the pole piece strip 20 does not meet the adhesive application requirements, which is not limited herein.

[0093] In one embodiment, the image acquisition device 11 is arranged corresponding to the position of the adhesive material on the target surface of the pole piece strip 20. Since the image acquisition device 11 is arranged corresponding to the position of the adhesive material on the target surface of the pole piece strip 20, the image acquisition device 11 can accurately focus on the position of the adhesive material on the target surface of the pole piece strip 20, so as to accurately acquire a pole piece image that truly reflects the adhesive application situation of the target surface of the pole piece strip 20. Subsequently, based on the pole piece image that can truly reflect the adhesive application situation of the target surface of the pole piece strip 20, adhesive application detection is performed, and it can be accurately determined whether the adhesive material pasted on the pole piece strip 20 meets the adhesive application requirements, so as to perform a preset operation in a timely manner when it is determined that the adhesive material pasted on the pole piece strip 20 does not meet the adhesive application requirements.

[0094] Among them, the position of the adhesive material on the target surface of the pole piece strip 20 is not limited, and can be specifically set according to actual use needs. For example, the position where the adhesive material is located is the two side edges of the target surface of the pole piece strip 20 along the length direction.

[0095] For example, Figure 2As shown, the positions where the bonding material is located are the two side edges along the length direction of the target surface of the pole piece strip 20, and the image acquisition device 11 is arranged corresponding to the two side edges of the target surface of the pole piece strip 20. Since the image acquisition device 11 is arranged corresponding to the two side edges of the target surface of the pole piece strip 20, the image acquisition device 11 can accurately focus on the two side edges of the target surface of the pole piece strip 20, and thus can accurately acquire a pole piece image that truly reflects the glue pasting situation of the two side edges of the target surface of the pole piece strip 20. Subsequently, based on the pole piece image that can truly reflect the glue pasting situation of the two side edges of the target surface of the pole piece strip 20, glue pasting detection is carried out, and it can be accurately determined whether the bonding material pasted on the two side edges of the target surface of the pole piece strip 20 meets the glue pasting requirements, so as to be able to execute a preset operation in a timely manner when it is determined that the bonding material pasted on the two side edges of the target surface of the pole piece strip 20 does not meet the glue pasting requirements.

[0096] It should be noted that when the image acquisition device 11 is arranged corresponding to the position where the bonding material is located on the target surface of the pole piece strip 20, since the acquisition range of one image acquisition device 11 is limited, generally, one image acquisition device 11 is only arranged corresponding to the position where one bonding material is located on the target surface of the pole piece strip 20, that is, one image acquisition device 11 generally only performs image acquisition on the position corresponding to the bonding material on the target surface. Therefore, when there are multiple positions where the bonding material is located on the target surface of the pole piece strip 20, one image acquisition device 11 needs to be arranged corresponding to each position where the bonding material is located on the target surface of the pole piece strip 20, that is, one image acquisition device 11 performs image acquisition on the position corresponding to the bonding material on the target surface. Of course, if the positions of multiple bonding materials on the target surface are relatively close to each other and the acquisition range of one image acquisition device 11 can cover the positions of multiple bonding materials, the image acquisition device 11 can also be arranged corresponding to the positions of multiple bonding materials on the target surface of the pole piece strip 20.

[0097] For example, as Figure 2 shown, the positions where the bonding material is located are the two side edges along the length direction of the front surface of the pole piece strip 20, and one image acquisition device 11 is arranged corresponding to the two side edges of the target surface of the pole piece strip 20 respectively.

[0098] In an embodiment, the target surface includes a front surface and a back surface. Since it is necessary to perform image acquisition on the front surface and the back surface of the pole piece strip 20 after glue pasting, an image acquisition device 11 is arranged corresponding to the front surface of the pole piece strip 20 for performing image acquisition on the front surface of the pole piece strip 20 after glue pasting, and an image acquisition device 11 is arranged corresponding to the back surface of the pole piece strip 20 for performing image acquisition on the back surface of the pole piece strip 20 after glue pasting.

[0099] For example, as Figure 2As shown, taking the target surface including the front side and the back side as an example, an image acquisition device 11 is provided corresponding to the front side of the pole piece strip 20, and an image acquisition device 11 is provided corresponding to the back side of the pole piece strip 20.

[0100] In a specific embodiment, adhesive materials are pasted on both side edges of the front and back sides of the pole piece strip 20 along the length direction. The image acquisition device 11 includes a front side acquisition device group and a back side acquisition device group. The front side acquisition device group includes two front side acquisition devices 111 respectively arranged corresponding to the two side edges of the front side. The front side acquisition device 111 is used to acquire the pole piece image of the front side of the pole piece strip 20. The back side acquisition device group includes two back side acquisition devices 112 respectively arranged corresponding to the two side edges of the back side. The back side acquisition device 112 is used to acquire the pole piece image of the back side of the pole piece strip 20.

[0101] Since the image acquisition device 11 is arranged corresponding to the two side edges of the front and back sides of the pole piece strip 20, the image acquisition device 11 can accurately focus on the two side edges of the front and back sides of the pole piece strip 20, so as to accurately acquire the pole piece image that truly reflects the adhesive pasting conditions of the two side edges of the front and back sides of the pole piece strip 20. Subsequently, based on the pole piece image that can truly reflect the adhesive pasting conditions of the two side edges of the front and back sides of the pole piece strip 20, adhesive pasting detection is carried out, and it can be accurately determined whether the adhesive materials pasted on the two side edges of the front and back sides of the pole piece strip 20 meet the adhesive pasting requirements, so as to be able to execute a preset operation in a timely manner when it is determined that the adhesive materials pasted on the two side edges of the front and back sides of the pole piece strip 20 do not meet the adhesive pasting requirements.

[0102] It should be noted that the front side acquisition device group and the back side acquisition device group can be located in the same vertical direction; of course, the front side acquisition device group and the back side acquisition device group can also not be located in the same vertical direction, that is, the front side acquisition device group and the back side acquisition device group are in a sequential position relationship along the length direction of the pole piece strip 20.

[0103] In an embodiment, the image acquisition device 11 is a Charge-Coupled Device (CCD) camera. Of course, in other embodiments, the image acquisition device 11 can also be a Complementary Metal Oxide Semiconductor (CMOS) industrial camera, a line array camera, a Short-Wave Infrared Camera (SWIR), etc., which are not limited herein.

[0104] In one embodiment, the pole piece glue - sticking detection system 10 further includes an encoder (not shown in the figure). When the pole piece strip 20 starts to move in the length direction, the encoder is triggered to rotate. When the encoder rotates to a preset angle, the image acquisition device 11 is triggered to start working. Specifically, when the pole piece strip 20 starts to move in the length direction, it drives the encoder to rotate. When the encoder rotates to the preset angle, it emits a pulse signal. After receiving the pulse signal, the image acquisition device 11 starts to work and performs image acquisition on the target surface of the pole piece strip 20 after glue - sticking. The size of the preset angle is not limited herein.

[0105] The pole piece strip 20 starts to move in the length direction. It can be that the glue - sticking mechanism operates to stick glue on the pole piece strip 20 and convey it, gradually sending it to the image acquisition device 11 for subsequent operations such as image acquisition. Herein, it is the operation of the glue - sticking mechanism that drives the encoder to rotate. The pole piece strip 20 can also be the pole piece strip 20 after glue - sticking, without the need to pass through the glue - sticking mechanism for glue - sticking again. The movement of the pole piece strip 20 in the length direction can be the conveyance by a conveying mechanism, gradually sending it to the image acquisition device 11 for subsequent operations such as image acquisition. Herein, it is the operation of the conveying mechanism that drives the encoder to rotate.

[0106] In one embodiment, the pole piece glue - sticking detection system 10 further includes a first controller (not shown in the figure) and a marking machine (not shown in the figure). The first controller is used to control the marking machine to perform marking. That is to say, the image acquisition device 11, the processing device 12, the first controller, and the marking machine constitute the pole piece glue - sticking detection system 10, so that when it is determined that the bonding material on the pole piece strip 20 does not meet the glue - sticking requirements, the marking machine can be used in a timely manner to mark the pole piece segments on the pole piece strip 20 that do not meet the glue - sticking requirements, thereby marking the pole piece segments that do not meet the glue - sticking requirements, ensuring that the pole piece segments that do not meet the glue - sticking requirements are accurately removed or reworked in subsequent processes, preventing the pole piece segments that do not meet the glue - sticking requirements from flowing out, and further avoiding winding them to form a battery cell with performance problems, and improving the quality of the formed battery cell.

[0107] In one embodiment, the pole piece gluing detection system 10 further includes a second controller (not shown in the figure) and a gluing mechanism (not shown in the figure). The gluing mechanism is arranged upstream of the image acquisition device 11. The first controller is used to control the gluing mechanism to glue the pole piece strip 20. That is to say, the image acquisition device 11, the processing device 12, the second controller and the gluing mechanism constitute the pole piece gluing detection system 10, which can be regarded as adding a visual detection system (constituted by the image acquisition device 11 and the processing device 12) to the gluing equipment (constituted by the second controller and the gluing mechanism). In addition, it can be that after the entire pole piece strip 20 is glued, subsequent operations such as gluing detection are carried out, or it can be that after a part of the pole piece strip 20 is glued, it is sent to the visual detection system to perform operations such as gluing detection, which does not affect the gluing of the remaining part of the pole piece strip 20 by the gluing equipment.

[0108] It should be noted that when the pole piece gluing detection system 10 only includes the image acquisition device 11 and the processing device 12, the image acquisition device 11 and the processing device 12 constitute the pole piece gluing detection system 10. The pole piece gluing detection system 10 is a system only used to detect the target surface of the glued pole piece strip 20 and perform preset operations based on the gluing detection results.

[0109] In one embodiment, the pole piece gluing detection system 10 further includes a host computer, a first controller, a marking machine, a second controller, a gluing mechanism and a client. When it is determined that the image acquisition device 11 is normal, the communication between the host computer and the second controller is normal, the communication between the host computer and the gluing mechanism is normal, the communication between the host computer and the second controller is normal, the communication between the host computer and the marking machine is normal, the disk memory of the host computer is sufficient, the communication between the host computer and the client is normal, and the communication between the client and the processing device 12 is normal, the gluing detection of the glued pole piece strip 20 is started.

[0110] In addition, if any one of the communication between the image acquisition device 11, the communication between the host computer and the second controller, the communication between the host computer and the gluing mechanism, the communication between the host computer and the second controller, the communication between the host computer and the marking machine, the disk memory of the host computer, the communication between the host computer and the client, and the communication between the client and the processing device 12 is in an abnormal state, the gluing detection of the glued pole piece strip 20 will not be started, and an alarm will be given to stop the machine.

[0111] Please refer to Figure 7 , Figure 7 which is a schematic flowchart of an embodiment of the pole piece gluing detection method provided by the present application. It should be noted that if there are substantially the same results, this embodiment is not limited to the Figure 7 shown process sequence. As Figure 7 shown, this embodiment includes: Step S71: Obtain a pole piece image acquired from the target surface of the pole piece tape after gluing.

[0112] In this embodiment, a pole piece image acquired from the target surface of the pole piece tape after gluing is obtained; wherein, the target surface includes at least one of the front surface and the back surface.

[0113] Step S72: Perform gluing detection on the pole piece image to obtain a gluing detection result.

[0114] In this embodiment, gluing detection is performed on the pole piece image to obtain a gluing detection result; wherein, the gluing detection result indicates whether the adhesive material pasted on the pole piece tape meets the gluing requirements.

[0115] Among them, the gluing requirements include at least one of the following: the positional relationship between the adhesive material on the pole piece tape and the film area meets a preset positional relationship, the adhesive material on the pole piece tape does not have a preset defect, the film area is the area on the pole piece tape coated with active material, and the preset defect includes at least one of a wrinkling defect and a breakage defect.

[0116] The gluing requirements include that the positional relationship between the adhesive material on the pole piece tape and the film area meets a preset positional relationship. If the positional relationship between the adhesive material on the pole piece tape and the film area does not meet the preset positional relationship, it means that the adhesive material on the pole piece tape is pasted deviating from the expected position, or in other words, all or a large part of the adhesive material on the pole piece tape invades the film area, that is, all or a large part of the adhesive material on the pole piece tape is pasted on the film area. And if all or a large part of the adhesive material on the pole piece tape is pasted on the film area, it will have a certain impact on the capacity of the battery cell formed by winding the pole piece tape; therefore, if the positional relationship between the adhesive material on the pole piece tape and the film area does not meet the preset positional relationship, then the adhesive material pasted on the pole piece tape does not meet the gluing requirements.

[0117] The gluing requirements include that the adhesive material on the pole piece tape does not have a preset defect, and the preset defect includes at least one of a wrinkling defect and a breakage defect. If the adhesive material on the pole piece tape has a preset defect, the pole piece tape may leak aluminum foil, resulting in risks such as low voltage and short circuit in the battery cell formed by winding the pole piece tape; therefore, if the adhesive material on the pole piece tape has a preset defect, then the adhesive material pasted on the pole piece tape does not meet the gluing requirements.

[0118] Among them, the breakage defect can be an edge breakage defect or a non-edge breakage defect, which is not limited here.

[0119] Step S73: When the gluing detection result indicates that the adhesive material on the pole piece tape does not meet the gluing requirements, perform a preset operation.

[0120] In this embodiment, when the glue application detection result indicates that the bonding material on the electrode sheet strip does not meet the glue application requirements, a preset operation is executed. The preset operation includes at least one of the following: marking the electrode sheet segment on the electrode sheet strip that does not meet the glue application requirements, controlling the glue application mechanism to stop working, and sending an alarm signal to the user.

[0121] Steps S71 - S73 are similar to the content of the embodiment of the electrode sheet glue application detection system. Refer to the content of the embodiment of the above electrode sheet glue application detection system, and details will not be repeated here.

[0122] Please refer to Figure 8 , Figure 8 is Figure 7 a schematic flowchart of an embodiment of step S72 shown in. It should be noted that if there are substantially the same results, this embodiment is not limited to Figure 8 the process sequence shown in. As Figure 8 shown, the glue application requirements include that the positional relationship between the bonding material on the electrode sheet strip and the film area meets a preset positional relationship. This embodiment includes: Step S81: Find a first boundary line and a second boundary line extending along the length direction of the electrode sheet strip from the electrode sheet image.

[0123] In this embodiment, a first boundary line and a second boundary line extending along the length direction of the electrode sheet strip are found from the electrode sheet image; wherein, one of the first boundary line and the second boundary line is the boundary line of the bonding material close to the film area, and the other is the boundary line of the film area close to the bonding material.

[0124] Step S82: Obtain a first distance between the first boundary line and the second boundary line.

[0125] In this embodiment, a first distance between the first boundary line and the second boundary line is obtained.

[0126] Step S83: In response to the first distance being within a preset distance range, determine that the positional relationship between the bonding material on the electrode sheet strip and the film area meets the preset positional relationship.

[0127] In this embodiment, in response to the first distance being within a preset distance range, determine that the positional relationship between the bonding material on the electrode sheet strip and the film area meets the preset positional relationship.

[0128] Steps S81 - S83 are similar to the content of the embodiment of the electrode sheet glue application detection system. Refer to the content of the embodiment of the above electrode sheet glue application detection system, and details will not be repeated here.

[0129] Please refer to Figure 9 , Figure 9 is Figure 7Flow schematic diagram of another embodiment of step S72 shown. It should be noted that if there are substantially the same results, this embodiment is not limited to Figure 9 the flow order shown. As Figure 9 shown, the tape sticking requirements include that there are no preset defects in the bonding material on the pole piece strip. This embodiment includes: Step S91: Find the third boundary line and the fourth boundary line from the pole piece image.

[0130] In this embodiment, the third boundary line and the fourth boundary line are found from the pole piece image; among them, the third boundary line and the fourth boundary line are respectively two boundary lines along the length direction of the pole piece strip where the tape is stuck.

[0131] Step S92: Obtain the second distance between the third boundary line and the fourth boundary line.

[0132] In this embodiment, the second distance between the third boundary line and the fourth boundary line is obtained.

[0133] Step S93: In response to the second distance being not less than the preset distance threshold, determine that there are no preset defects in the bonding material on the pole piece strip.

[0134] In this embodiment, in response to the second distance being not less than the preset distance threshold, determine that there are no preset defects in the bonding material on the pole piece strip.

[0135] Steps S91 - S93 are similar to the embodiment content of the pole piece tape sticking detection system. The embodiment content of the above-mentioned pole piece tape sticking detection system can be referred to and will not be elaborated here.

[0136] Please refer to Figure 10 , Figure 10 is Figure 7 Flow schematic diagram of another embodiment of step S72 shown. It should be noted that if there are substantially the same results, this embodiment is not limited to Figure 10 the flow order shown. As Figure 10 shown, the pole piece strip is divided into several pole piece segments along the length direction. This embodiment includes: Step S101: Identify the image data corresponding to each pole piece segment from the pole piece image.

[0137] In this embodiment, the image data corresponding to each pole piece segment is identified from the pole piece image.

[0138] In one embodiment, a preset position point of the pole piece tape is identified from the pole piece image. Taking the preset position point as the starting point, image data of every preset number of tab lengths is used as the image data of a pole piece segment from the pole piece image, where the pole piece segment represents the pole piece segment required for one battery cell, and the preset number is the number of tabs required for one battery cell; alternatively, in the case where positioning marks are used to distinguish each pole piece segment on the pole piece tape, each positioning mark is identified from the pole piece image, and the image data between two adjacent positioning marks is used as the image data of a pole piece segment.

[0139] Step S102: Perform glue application detection on the image data corresponding to each pole piece segment respectively to obtain the glue application detection results corresponding to each pole piece segment.

[0140] In this embodiment, glue application detection is performed on the image data corresponding to each pole piece segment respectively to obtain the glue application detection results corresponding to each pole piece segment; among them, the glue application detection result corresponding to the pole piece segment represents whether the adhesive material pasted on the pole piece segment meets the glue application requirements.

[0141] In one embodiment, the pole piece image includes a plurality of frames of pole piece images collected at different positions in the length direction of the target surface of the pole piece tape during the movement of the pole piece tape in the length direction after glue application, where the image data corresponding to each pole piece segment of the target surface is identified from the corresponding plurality of frames of pole piece images of the target surface.

[0142] Steps S101 - S102 are similar to the embodiment content of the pole piece glue application detection system. Refer to the embodiment content of the above-mentioned pole piece glue application detection system, and details will not be repeated here.

[0143] Please refer to Figure 11 , Figure 11 which Figure 10 is a schematic flowchart of an embodiment of step S102 shown. It should be noted that if there are substantially the same results, this embodiment is not limited to the Figure 11 flow order shown. As Figure 11 shown, this embodiment includes: Step S111: For each target surface, perform glue application detection on the image data corresponding to each pole piece segment of the target surface to determine whether the adhesive material on each pole piece segment on the target surface meets the glue application requirements.

[0144] Step S112: In response to that each target surface of the pole piece segment meets the glue application requirements, determine that the glue application detection result corresponding to the pole piece segment is that the adhesive material on the pole piece segment meets the glue application requirements.

[0145] Step S113: In response to the target surface of the electrode sheet fragment not meeting the adhesive application requirements, determine that the adhesive application detection result corresponding to the electrode sheet fragment is that the adhesive material on the electrode sheet fragment does not meet the adhesive application requirements.

[0146] Steps S111 - S113 are similar to the embodiment content of the electrode sheet adhesive application detection system. Refer to the embodiment content of the above-mentioned electrode sheet adhesive application detection system and will not be elaborated here.

[0147] Please refer to Figure 12 , Figure 12 FIG. is a schematic structural diagram of an embodiment of the electrode sheet adhesive application detection device provided by the present application. The electrode sheet adhesive application detection device 120 includes an acquisition module 121, a detection module 122, and an execution module 123; the acquisition module 121 is used to acquire an electrode sheet image obtained by collecting the target surface of the electrode sheet strip after adhesive application, and the target surface includes at least one of the front surface and the back surface; the detection module 122 is used to perform adhesive application detection on the electrode sheet image to obtain an adhesive application detection result, where the adhesive application detection result characterizes whether the adhesive material pasted on the electrode sheet strip meets the adhesive application requirements; the execution module 123 is used to perform a preset operation when the adhesive application detection result characterizes that the adhesive material on the electrode sheet strip does not meet the adhesive application requirements, and the preset operation includes at least one of the following: marking the electrode sheet fragment that does not meet the adhesive application requirements on the electrode sheet strip, controlling the adhesive application mechanism to stop working, and sending an alarm signal to the user; where the adhesive application requirements include at least one of the following: the positional relationship between the adhesive material on the electrode sheet strip and the film area meets a preset positional relationship, and there are no preset defects in the adhesive material on the electrode sheet strip, the film area is the area on the electrode sheet strip coated with active material, and the preset defects include at least one of a wrinkling defect and a breakage defect.

[0148] Among them, the above-mentioned adhesive application requirements include: the positional relationship between the adhesive material on the pole piece strip and the film area meets a preset positional relationship; the detection module 122 is used to perform adhesive application detection on the pole piece image to obtain an adhesive application detection result, including: finding a first boundary line and a second boundary line extending along the length direction of the pole piece strip from the pole piece image, where one of the first boundary line and the second boundary line is the boundary line of the adhesive material close to the film area, and the other is the boundary line of the film area close to the adhesive material; obtaining a first distance between the first boundary line and the second boundary line; in response to the first distance being within a preset distance range, determining that the positional relationship between the adhesive material on the pole piece strip and the film area meets the preset positional relationship; and / or, the above-mentioned adhesive application requirements include: there are no preset defects in the adhesive material on the pole piece strip; the detection module 122 is used to perform adhesive application detection on the pole piece image to obtain an adhesive application detection result, including: finding a third boundary line and a fourth boundary line from the pole piece image, where the third boundary line and the fourth boundary line are respectively two boundary lines of the adhesive application extending along the length direction of the pole piece strip; obtaining a second distance between the third boundary line and the fourth boundary line; in response to the second distance being not less than a preset distance threshold, determining that there are no preset defects in the adhesive material on the pole piece strip.

[0149] Among them, the above-mentioned pole piece strip is divided into several pole piece segments along the length direction; the detection module 122 is used to perform adhesive application detection on the pole piece image to obtain an adhesive application detection result, including: identifying the image data corresponding to each pole piece segment from the pole piece image; respectively performing adhesive application detection on the image data corresponding to each pole piece segment to obtain the adhesive application detection result corresponding to each pole piece segment, where the adhesive application detection result corresponding to the pole piece segment characterizes whether the adhesive material pasted on the pole piece segment meets the adhesive application requirements.

[0150] Among them, the detection module 122 is used to identify the image data corresponding to each pole piece segment from the pole piece image, including: identifying the preset position points of the pole piece tape from the pole piece image, using the preset position points as the starting points, and taking the image data of every preset number of tab lengths from the pole piece image as the image data of one pole piece segment, where the pole piece segment represents the pole piece segment required for one battery cell, and the preset number is the number of tabs required for one battery cell; or, when the pole piece tape uses positioning marks to distinguish each pole piece segment, identifying each positioning mark from the pole piece image, and taking the image data between two adjacent positioning marks as the image data of one pole piece segment; and / or, the detection module 122 is used to perform glue application detection on the image data corresponding to each pole piece segment respectively, and obtain the glue application detection results corresponding to each pole piece segment, including: for each target surface, performing glue application detection on the image data corresponding to each pole piece segment of the target surface respectively to determine whether the adhesive material on each pole piece segment on the target surface meets the glue application requirements; in response to that all target surfaces of the pole piece segment meet the glue application requirements, determining that the glue application detection result corresponding to the pole piece segment is that the adhesive material on the pole piece segment meets the glue application requirements; in response to that there is a target surface of the pole piece segment that does not meet the glue application requirements, determining that the glue application detection result corresponding to the pole piece segment is that the adhesive material on the pole piece segment does not meet the glue application requirements; and / or, the above-mentioned pole piece image includes a plurality of frames of pole piece images collected at different positions in the length direction of the target surface of the pole piece tape during the movement of the pole piece tape in the length direction after glue application, where the image data corresponding to each pole piece segment of the target surface is identified from the plurality of frames of pole piece images corresponding to the target surface.

[0151] The above are only the embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present application by the same token.

Claims

1. A pole piece adhesive detection system, characterized in that, The system includes: an image acquisition device, which is arranged corresponding to the target surface of the pole piece tape, and is used to acquire an image of the target surface of the pole piece tape after pasting glue to obtain a pole piece image, where the target surface includes at least one of the front surface and the back surface; a processing device, which is communicatively connected to the image acquisition device, and is used to perform glue pasting detection on the pole piece image to obtain a glue pasting detection result, where the glue pasting detection result characterizes whether the adhesive material pasted on the pole piece tape meets the glue pasting requirements; and in the case where the glue pasting detection result characterizes that the adhesive material on the pole piece tape does not meet the glue pasting requirements, perform a preset operation, and the preset operation includes at least one of the following: marking the pole piece segment on the pole piece tape that does not meet the glue pasting requirements, controlling the glue pasting mechanism to stop working, and sending an alarm signal to the user; wherein, the glue pasting requirements include at least one of the following: the positional relationship between the adhesive material on the pole piece tape and the film area meets a preset positional relationship, and there are no preset defects in the adhesive material on the pole piece tape, the film area is an area on the pole piece tape coated with an active material, and the preset defects include at least one of a wrinkling defect and a breakage defect.

2. The system according to claim 1, wherein The glue pasting requirements include: the positional relationship between the adhesive material on the pole piece tape and the film area meets a preset positional relationship; The processing device performs the glue pasting detection on the pole piece image to obtain a glue pasting detection result, including: finding a first boundary line and a second boundary line extending along the length direction of the pole piece tape from the pole piece image, where one of the first boundary line and the second boundary line is the boundary line of the adhesive material close to the film area, and the other is the boundary line of the film area close to the adhesive material; acquiring a first distance between the first boundary line and the second boundary line; responding to the first distance being within a preset distance range, determining that the positional relationship between the adhesive material on the pole piece tape and the film area meets the preset positional relationship.

3. The system according to claim 1 or 2, wherein The glue pasting requirements include: there are no preset defects in the adhesive material on the pole piece tape; The processing device performs the glue pasting detection on the pole piece image to obtain a glue pasting detection result, including: finding a third boundary line and a fourth boundary line from the pole piece image, where the third boundary line and the fourth boundary line are respectively two boundary lines of the glue pasting extending along the length direction of the pole piece tape; acquiring a second distance between the third boundary line and the fourth boundary line; responding to the second distance being not less than a preset distance threshold, determining that there are no such preset defects in the adhesive material on the pole piece tape.

4. The system according to claim 1, wherein The pole piece tape is divided into a plurality of pole piece segments along the length direction; The processing device is used to identify the image data corresponding to each pole piece segment from the pole piece image, and perform glue pasting detection on the image data corresponding to each pole piece segment respectively to obtain the glue pasting detection result corresponding to each pole piece segment, where the glue pasting detection result corresponding to the pole piece segment characterizes whether the adhesive material pasted on the pole piece segment meets the glue pasting requirements.

5. The system according to claim 4, wherein The processing device executes identifying the image data corresponding to each of the pole piece segments from the pole piece image, including: Identifying preset position points of the pole piece tape from the pole piece image, using the preset position points as starting points, and taking the image data of every preset number of tab lengths from the pole piece image as the image data of one of the pole piece segments, where the pole piece segment represents the pole piece segment required for one battery cell, and the preset number is the number of tabs required for one battery cell; or, In the case where positioning marks are used to distinguish each of the pole piece segments on the pole piece tape, identifying each of the positioning marks from the pole piece image, and taking the image data between two adjacent positioning marks as the image data of one of the pole piece segments; And / or, the processing device executes respectively performing glue application detection on the image data corresponding to each of the pole piece segments to obtain the glue application detection results corresponding to each of the pole piece segments, including: For each of the target surfaces, respectively performing glue application detection on the image data corresponding to each of the pole piece segments on the target surface to determine whether the adhesive material on each of the pole piece segments on the target surface meets the glue application requirements; In response to each of the target surfaces of the pole piece segment meeting the glue application requirements, determining that the glue application detection result corresponding to the pole piece segment is that the adhesive material on the pole piece segment meets the glue application requirements; In response to there being a target surface of the pole piece segment that does not meet the glue application requirements, determining that the glue application detection result corresponding to the pole piece segment is that the adhesive material on the pole piece segment does not meet the glue application requirements.

6. The system according to claim 4 or 5, characterized in that, The image acquisition device is used to respectively acquire a plurality of frames of pole piece images corresponding to different positions in the length direction of the target surface of the pole piece tape during the movement of the pole piece tape in the length direction after glue application, where the image data corresponding to each of the pole piece segments on the target surface is identified from the plurality of frames of pole piece images corresponding to the target surface.

7. The system according to claim 4 or 5, characterized in that, The preset operation includes: marking the pole piece segments on the pole piece tape that do not meet the glue application requirements; The processing device is further used to, in the case where it is detected that the adhesive material on the pole piece segment does not meet the glue application requirements, send a marking signal to the first controller so that the first controller controls the marking machine to mark the pole piece segments that do not meet the glue application requirements.

8. The system according to claim 1, characterized in that The preset operation includes: controlling the glue application mechanism to stop working; The processing device is further used to, in response to detecting that the adhesive material on the pole piece tape does not meet the glue application requirements, send a shutdown signal to the second controller so that the second controller controls the glue application mechanism to stop working.

9. The system according to claim 1, characterized in that, The image acquisition device is arranged corresponding to the position of the adhesive material on the target surface of the pole piece tape.

10. The system according to claim 9, wherein The adhesive material is pasted on both side edges of the positive and negative sides of the pole piece strip along the length direction. The image acquisition device includes a front acquisition device group and a back acquisition device group. The front acquisition device group includes two front acquisition devices respectively arranged corresponding to the two side edges of the front side. The front acquisition device is used to acquire the pole piece image of the front side of the pole piece strip. The back acquisition device group includes two back acquisition devices respectively arranged corresponding to the two side edges of the back side. The back acquisition device is used to acquire the pole piece image of the back side of the pole piece strip.

11. The system according to claim 1, characterized in that, The pole piece glue sticking detection system further includes at least one of the following groups of components: An encoder, when the pole piece strip starts to move along the length direction, triggering the encoder to rotate. When the encoder rotates to a preset angle, triggering the image acquisition device to start working; A first controller and a marking machine, the first controller is used to control the marking machine to perform marking; A second controller and the glue sticking mechanism, the glue sticking mechanism is arranged upstream of the image acquisition device, and the first controller is used to control the glue sticking mechanism to stick glue on the pole piece strip.

12. The system according to claim 1, wherein The processing device is further used to display and / or save the glue sticking detection result when the glue sticking detection result indicates that the adhesive material on the pole piece strip meets the glue sticking requirements.

13. A method for detecting the pasting of a pole piece, characterized in that, Including: Obtaining the pole piece image acquired from the target surface of the pole piece strip after glue sticking, where the target surface includes at least one of the front side and the back side; Performing glue sticking detection on the pole piece image to obtain a glue sticking detection result, where the glue sticking detection result indicates whether the adhesive material pasted on the pole piece strip meets the glue sticking requirements; When the glue sticking detection result indicates that the adhesive material on the pole piece strip does not meet the glue sticking requirements, performing a preset operation, where the preset operation includes at least one of the following: marking the pole piece segment on the pole piece strip that does not meet the glue sticking requirements, controlling the glue sticking mechanism to stop working, and sending an alarm signal to the user; Wherein, the glue sticking requirements include at least one of the following: the positional relationship between the adhesive material on the pole piece strip and the film area meets a preset positional relationship, and there is no preset defect in the adhesive material on the pole piece strip. The film area is the area on the pole piece strip coated with the active material, and the preset defect includes at least one of a wrinkling defect and a breakage defect.

14. The method according to claim 13, wherein The glue sticking requirements include: the positional relationship between the adhesive material on the pole piece strip and the film area meets a preset positional relationship; the performing glue sticking detection on the pole piece image to obtain a glue sticking detection result includes: Finding a first boundary line and a second boundary line extending along the length direction of the pole piece strip from the pole piece image, where one of the first boundary line and the second boundary line is the boundary line of the adhesive material close to the film area, and the other is the boundary line of the film area close to the adhesive material; Obtaining a first distance between the first boundary line and the second boundary line; In response to the first distance being within a preset distance range, determining that the positional relationship between the adhesive material on the pole piece strip and the film area meets the preset positional relationship; And / or, the tape sticking requirements include: there is no preset defect in the adhesive material on the pole piece tape; the tape sticking detection of the pole piece image to obtain a tape sticking detection result includes: Finding a third boundary line and a fourth boundary line from the pole piece image, where the third boundary line and the fourth boundary line are respectively two boundary lines along which the tape sticking extends along the length direction of the pole piece tape; Obtaining a second distance between the third boundary line and the fourth boundary line; In response to the second distance being not less than a preset distance threshold, determining that there is no such preset defect in the adhesive material on the pole piece tape.

15. The method according to claim 13, wherein The pole piece tape is divided into a plurality of pole piece segments along the length direction; The tape sticking detection of the pole piece image to obtain a tape sticking detection result includes: Identifying the image data corresponding to each of the pole piece segments from the pole piece image; Performing tape sticking detection on the image data corresponding to each of the pole piece segments respectively to obtain the tape sticking detection results corresponding to each of the pole piece segments, where the tape sticking detection result corresponding to the pole piece segment characterizes whether the adhesive material pasted on the pole piece segment meets the tape sticking requirements.

16. The method according to claim 15, wherein The identifying the image data corresponding to each of the pole piece segments from the pole piece image includes: Identifying a preset position point of the pole piece tape from the pole piece image, using the preset position point as a starting point, and taking the image data every preset number of tab lengths from the pole piece image as the image data of one pole piece segment, where the pole piece segment represents the pole piece segment required for one battery cell, and the preset number is the number of tabs required for one battery cell; or, In the case where the pole piece tape uses positioning marks to distinguish each of the pole piece segments, identifying each of the positioning marks from the pole piece image, and taking the image data between two adjacent positioning marks as the image data of one pole piece segment; And / or, the performing tape sticking detection on the image data corresponding to each of the pole piece segments respectively to obtain the tape sticking detection results corresponding to each of the pole piece segments includes: For each of the target surfaces, performing tape sticking detection on the image data corresponding to each of the pole piece segments of the target surface respectively to determine whether the adhesive material of each of the pole piece segments on the target surface meets the tape sticking requirements; In response to each of the target surfaces of the pole piece segment meeting the tape sticking requirements, determining that the tape sticking detection result corresponding to the pole piece segment is that the adhesive material on the pole piece segment meets the tape sticking requirements; In response to the pole piece segment having a target surface that does not meet the tape sticking requirements, determining that the tape sticking detection result corresponding to the pole piece segment is that the adhesive material on the pole piece segment does not meet the tape sticking requirements; And / or, the pole piece image includes a plurality of frames of pole piece images collected at different positions in the length direction of the target surface of the pole piece tape during the movement of the pole piece tape along the length direction after tape sticking, where the image data corresponding to each of the pole piece segments of the target surface is identified from the corresponding plurality of frames of pole piece images of the target surface.

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