Battery module defect detection method, control device, electronic equipment and medium

Abstract

The invention discloses a defect detection method of a battery module, a control device, electronic equipment and a medium. The defect detection method of the battery module comprises the following steps: determining first light source control information corresponding to a first round of detection; controlling the light source assembly to perform multiple first lighting operations according to the first light source control information; controlling the detection camera to acquire a first detection image in each first lighting operation; performing appearance defect identification on the battery module before film coating based on the first detection image; determining second light source control information corresponding to the second round of detection; controlling the light source assembly to perform multiple second lighting operations according to the second light source control information; controlling the detection camera to obtain a second detection image in each second lighting operation; and performing appearance defect identification on the enveloped battery module based on the second detection image. According to the defect detection method, the same appearance detection system can be controlled to carry out surface defect detection on the battery module before film coating and the battery module after film coating, and the battery production cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of visual inspection, and in particular to a defect detection method, control device, electronic device and medium for a battery module. Background Art

[0002] In the battery manufacturing process, the battery module needs to be inspected for surface defects before and after coating. In the prior art, two sets of appearance inspection systems are needed to inspect the surface defects of the battery module before and after coating respectively. The cost of the appearance inspection system is high, which increases the battery production cost. Summary of the invention

[0003] The present application provides a battery module defect detection method, a control device, an electronic device and a medium, which can control the same appearance inspection system to perform surface defect inspection on the battery module before and after coating, respectively, so as to reduce the battery production cost.

[0004] In a first aspect, an embodiment of the present application provides a defect detection method for a battery module, by controlling an appearance detection system to perform surface defect detection on a pre-encapsulated battery module and a post-encapsulated battery module, respectively. The appearance detection system includes a light source assembly and a detection camera. The light source assembly includes a support member and a plurality of light-emitting units. The support member is bowl-shaped. The appearance detection system is provided with an inspection station on the concave side of the support member. A through hole is provided at the center of the support member. The plurality of light-emitting units are attached to the concave surface of the support member and are arranged around the through hole. The detection camera is arranged at the through hole. The defect detection method for a battery module includes: after the pre-encapsulated battery module is placed at the detection station, first light source control information corresponding to a first round of detection is determined; according to the first light source control information, the light source assembly is controlled to perform multiple first lighting operations, wherein at least two of the first lighting operations correspond to The turned-on light-emitting units are different from each other; in each first lighting operation, the detection camera is controlled to obtain at least one first detection image for the pre-encapsulated battery module corresponding to each first lighting operation; the appearance defects of the pre-encapsulated battery module are identified based on all the first detection images obtained in the first round of detection; after the battery module after encapsulation is placed in the detection station, the second light source control information corresponding to the second round of detection is determined; according to the second light source control information, the light source assembly is controlled to perform multiple second lighting operations, wherein at least two of the second lighting operations correspond to the turned-on light-emitting units that are different from each other; in each second lighting operation, the detection camera is controlled to obtain at least one second detection image for the post-encapsulated battery module corresponding to each second lighting operation; the appearance defects of the post-encapsulated battery module are identified based on all the second detection images obtained in the second round of detection.

[0005] According to the aforementioned implementation of the first aspect of the present application, the first light source control information includes the first turn-on sequence information of the light-emitting units to be turned on corresponding to the first round of detection and each light-emitting unit to be turned on in the first round of detection; the second light source control information includes the light-emitting units to be turned on corresponding to the second round of detection and each light-emitting unit to be turned on in the second round of detection; the step of controlling the light source component to perform multiple first lighting operations according to the first light source control information includes: controlling the light source component to turn on each light-emitting unit to be turned on corresponding to the first round of detection in sequence according to the first turn-on sequence information, so as to form multiple first lighting operations; the step of controlling the light source component to perform multiple second lighting operations according to the second light source control information includes: controlling the light source component to turn on each light-emitting unit to be turned on corresponding to the second round of detection in sequence according to the second turn-on sequence information, so as to form multiple second lighting operations.

[0006] According to any of the aforementioned implementations of the first aspect of the present application, the total number of light-emitting units to be turned on corresponding to the second round of detection is equal to the total number of light-emitting units to be turned on corresponding to the first round of detection.

[0007] According to any of the aforementioned implementations of the first aspect of the present application, the total number of light-emitting units to be turned on corresponding to the second round of detection is less than the total number of light-emitting units to be turned on corresponding to the first round of detection.

[0008] According to any of the aforementioned embodiments of the first aspect of the present application, each of the light-emitting units includes multiple light-emitting elements of multiple colors; the first light source control information includes the first light color information corresponding to the first round of detection, the light-emitting units to be turned on corresponding to the first round of detection, and the first turn-on sequence information of each light-emitting unit to be turned on in the first round of detection; the second light source control information includes the second light color information corresponding to the second round of detection, the light-emitting units to be turned on corresponding to the second round of detection, and the second turn-on sequence information of each light-emitting unit to be turned on in the second round of detection; the step of controlling the light source component to perform multiple first lighting operations according to the first light source control information includes: controlling the light source component according to the first turn-on sequence information Turn on each light-emitting unit to be turned on corresponding to the first round of detection in sequence, and control each light-emitting unit to be turned on corresponding to the first round of detection to generate first color light when turned on according to the first light color information, so as to form multiple first lighting operations; the step of controlling the light source assembly to perform multiple second lighting operations according to the second light source control information includes: controlling the light source assembly to turn on each light-emitting unit to be turned on corresponding to the second round of detection in sequence according to the second turn-on sequence information, and controlling each light-emitting unit to be turned on corresponding to the second round of detection to generate second color light when turned on according to the second light color information, so as to form multiple second lighting operations; wherein, the second color light is different from the first color light.

[0009] According to any of the aforementioned embodiments of the first aspect of the present application, the surface of the battery module after coating has a blue film layer, the first color light is white light, and the second color light is blue light.

[0010] According to any of the aforementioned implementations of the first aspect of the present application, the detection camera is a multispectral camera; the first detection image is a color image; and the second detection image includes a color image and / or a black and white image.

[0011] According to any of the aforementioned embodiments of the first aspect of the present application, each of the light-emitting units includes a plurality of light-emitting sub-units arranged in sequence from the through hole toward a direction away from the center of the through hole, and the angles formed by the plurality of light-emitting sub-units in each of the light-emitting units and the plane where the detection station is located are different from each other; the first light source control information includes the first light-emitting angle information corresponding to the first round of detection, the light-emitting unit to be turned on corresponding to the first round of detection, and the first turn-on sequence information of each light-emitting unit to be turned on in the first round of detection; the second light source control information includes the second light-emitting angle information corresponding to the second round of detection, the light-emitting unit to be turned on corresponding to the second round of detection, and the second turn-on sequence information of each light-emitting unit to be turned on in the second round of detection; the step of controlling the light source assembly to perform multiple first lighting operations according to the first light source control information includes: controlling the light source assembly to perform multiple first lighting operations according to the first light source control information according to the The first light-emitting angle information determines a first light-emitting sub-unit at a first angle from the multiple light-emitting sub-units of each light-emitting unit; according to the first opening sequence information, the light source assembly is controlled to sequentially open the first light-emitting sub-units of each light-emitting unit to be turned on corresponding to the first round of detection, so as to form multiple first lighting operations; the step of controlling the light source assembly to perform multiple second lighting operations according to the second light source control information includes: determining a second light-emitting sub-unit at a second angle from the multiple light-emitting sub-units of each light-emitting unit according to the second light-emitting angle information; according to the second opening sequence information, the light source assembly is controlled to sequentially open the second light-emitting sub-units of each light-emitting unit to be turned on corresponding to the second round of detection, so as to form multiple second lighting operations; wherein, the second angle is different from the first angle.

[0012] In a second aspect, an embodiment of the present application provides a defect detection control device for a battery module, which performs surface defect detection on a pre-encapsulated battery module and a post-encapsulated battery module by controlling an appearance detection system, wherein the appearance detection system comprises a light source assembly and a detection camera, wherein the light source assembly comprises a support member and a plurality of light-emitting units, wherein the support member is bowl-shaped, and the appearance detection system is provided with a detection station on one side of a concave surface of the support member, a through hole is provided at the center position of the support member, the plurality of light-emitting units are attached to the concave surface of the support member and are arranged around the through hole, and the detection camera is arranged at the through hole, and the defect detection control device for the battery module comprises: a first information determination module, which is used to determine first light source control information corresponding to a first round of detection after the pre-encapsulated battery module is placed in the detection station; a first lighting control module, which is used to control the light source assembly to perform multiple first lighting operations according to the first light source control information, wherein at least two of the first lighting operations correspond to different light-emitting units being turned on; and a first camera control module. A module is used to control the inspection camera to obtain at least one first inspection image of the pre-encapsulated battery module corresponding to each first lighting operation in each first lighting operation; a first defect recognition module is used to identify the appearance defects of the pre-encapsulated battery module based on all the first inspection images obtained in the first round of inspection; a second information determination module is used to determine the second light source control information corresponding to the second round of inspection after the battery module after encapsulation is placed in the inspection station; a second lighting control module is used to control the light source assembly to perform multiple second lighting operations according to the second light source control information, wherein the light-emitting units turned on corresponding to at least two of the second lighting operations are different from each other; a second camera control module is used to control the inspection camera to obtain at least one second inspection image of the post-encapsulated battery module corresponding to each second lighting operation in each second lighting operation; a second defect recognition module is used to identify the appearance defects of the post-encapsulated battery module based on all the second inspection images obtained in the second round of inspection.

[0013] In a third aspect, an embodiment of the present application provides an electronic device, the electronic device comprising a memory and at least one processor, the memory storing instructions, and the at least one processor calling the instructions in the memory so that the electronic device executes a battery module defect detection method according to any of the aforementioned embodiments of the first aspect of the present application.

[0014] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having instructions stored thereon, which, when executed by a processor, implements a battery module defect detection method according to any of the aforementioned embodiments of the first aspect of the present application.

[0015] According to the defect detection method of the battery module of the embodiment of the present application, in the first round of detection, the battery module before coating is placed in the detection station, and multiple first detection images can be obtained for the battery module before coating, and then the appearance defect recognition of the battery module before coating is performed based on all the first detection images obtained in the first round of detection, so as to realize the surface defect detection of the battery module before coating. In the second round of detection, the battery module after coating is placed in the detection station, and multiple second detection images can be obtained for the battery module after coating, and then the appearance defect recognition of the battery module after coating is performed based on all the second detection images obtained in the second round of detection, so as to realize the surface defect detection of the battery module after coating. The defect detection method of the embodiment of the present application can control the same set of appearance detection system to perform surface defect detection on the battery module before coating and the battery module after coating respectively, so as to reduce the production cost of the battery. In the first round of detection, the light-emitting units corresponding to the at least two first lighting operations are different from each other, and the first detection images corresponding to the light-emitting units at different positions of the battery module before coating can be obtained, so as to improve the accuracy of the surface defect detection of the battery module before coating. In the second round of inspection, at least two second lighting operations correspond to different light-emitting units that are turned on, so that the second inspection image corresponding to the light-emitting units at different circumferential positions of the battery module after packaging can be obtained, thereby improving the accuracy of surface defect detection of the battery module after packaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 This is a structural schematic diagram of an appearance inspection system in an embodiment of a battery transfer robot of the present application;

[0018] Figure 2 This is a bottom view schematic diagram of a light source assembly in an embodiment of the appearance inspection system of the present application;

[0019] Figure 3 A flowchart of an embodiment of a defect detection method for a battery module of the present application;

[0020] Figure 4 This is a schematic diagram of the structure of the first round of inspection in an embodiment of the appearance inspection method of the battery module of the present application;

[0021] Figure 5 This is a schematic diagram of the structure of the second round of inspection in an embodiment of the appearance inspection method of the battery module of the present application;

[0022] Figure 6 This is a structural schematic diagram of an embodiment of a defect detection control device for a battery module of the present application;

[0023] Figure 7 This is a schematic diagram of the hardware structure of an embodiment of the electronic device of the present application.

[0024] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0026] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0028] The present application provides a battery module defect detection method. Figure 1This is a structural diagram of the appearance inspection system in an embodiment of the battery transfer robot of the present application. The defect detection method of the battery module performs surface defect detection on the battery module before and after the coating by controlling the appearance inspection system. The appearance inspection system includes a light source assembly 110 and a detection camera 120. The light source assembly 110 includes a support 111 and a plurality of light-emitting units 112. The support 111 is bowl-shaped. The appearance inspection system is provided with an inspection station 130 on one side of the concave surface of the support 111. A through hole 111s is provided at the center of the support 111. A plurality of light-emitting units 112 are attached to the concave surface of the support 111 and are arranged around the through hole 111s. Each light-emitting unit 112 includes a plurality of light-emitting elements, such as light-emitting diodes (LEDs). The detection camera 120 is arranged at the through hole 111s. The detection camera 120 is, for example, a charge coupled device (CCD) camera.

[0029] Figure 3 This is a flow chart of an embodiment of a battery module defect detection method of the present application. The battery module defect detection method includes steps S110 to S180.

[0030] Figure 4 This is a schematic diagram of the structure of the first round of inspection in an embodiment of the appearance inspection method of the battery module of the present application. In step S110, after the battery module 200a is placed in the inspection station 130 before packaging, the first light source control information corresponding to the first round of inspection is determined.

[0031] In step S120 , the light source assembly 110 is controlled to perform multiple first lighting operations according to the first light source control information, wherein at least two first lighting operations correspond to different light emitting units 112 being turned on.

[0032] In step S130 , in each first lighting operation, the inspection camera 120 is controlled to obtain at least one first inspection image of the pre-encapsulation battery module 200 a corresponding to each first lighting operation.

[0033] In step S140, appearance defects of the pre-encapsulated battery module 200a are identified based on all first detection images obtained in the first round of detection.

[0034] Figure 5 This is a structural diagram of the second round of inspection in an embodiment of a method for inspecting the appearance of a battery module of the present application.

[0035] In step S150, after the coated battery module 200b is placed in the inspection station 130, the second light source control information corresponding to the second round of inspection is determined.

[0036] In step S160 , the light source assembly 110 is controlled to perform multiple second lighting operations according to the second light source control information, wherein at least two second lighting operations correspond to different light emitting units 112 being turned on.

[0037] In step S170 , in each second lighting operation, the inspection camera 120 is controlled to obtain at least one second inspection image of the coated battery module 200 b corresponding to each second lighting operation.

[0038] In step S180, appearance defects of the coated battery module 200b are identified based on all second inspection images obtained in the second round of inspection.

[0039] According to the defect detection method of the battery module of the embodiment of the present application, in the first round of detection, the pre-encapsulated battery module 200a is placed in the detection station 130, and multiple first detection images can be obtained for the pre-encapsulated battery module 200a, and then the appearance defect recognition of the pre-encapsulated battery module 200a is performed based on all the first detection images obtained in the first round of detection, so as to realize the surface defect detection of the pre-encapsulated battery module 200a. In the second round of detection, the post-encapsulated battery module 200b is placed in the detection station 130, and multiple second detection images can be obtained for the post-encapsulated battery module 200b, and then the appearance defect recognition of the post-encapsulated battery module 200b is performed based on all the second detection images obtained in the second round of detection, so as to realize the surface defect detection of the post-encapsulated battery module 200b. The defect detection method of the embodiment of the present application can control the same set of appearance detection system to perform surface defect detection on the pre-encapsulated battery module 200a and the post-encapsulated battery module 200b, respectively, so as to reduce the battery production cost.

[0040] In the first round of detection, the light-emitting units 112 that are turned on in at least two first lighting operations are different from each other, and the first detection image corresponding to the light-emitting units 112 at different positions of the battery module 200a before packaging can be obtained, thereby improving the accuracy of surface defect detection of the battery module 200a before packaging. In the second round of detection, the light-emitting units 112 that are turned on in at least two second lighting operations are different from each other, and the second detection image corresponding to the light-emitting units 112 at different positions of the battery module 200b after packaging can be obtained, thereby improving the accuracy of surface defect detection of the battery module 200b after packaging.

[0041] In some embodiments, the first light source control information includes the light units to be turned on corresponding to the first round of detection and the first turn-on sequence information of each light unit to be turned on in the first round of detection. The second light source control information includes the light units to be turned on corresponding to the second round of detection and the second turn-on sequence information of each light unit to be turned on in the second round of detection.

[0042] In some embodiments, step S120 of controlling the light source assembly 110 to perform multiple first lighting operations according to the first light source control information includes: controlling the light source assembly 110 to sequentially turn on each light-emitting unit to be turned on corresponding to the first round of detection according to the first turn-on sequence information to form multiple first lighting operations.

[0043] In some embodiments, step S160 of controlling the light source assembly 110 to perform multiple second lighting operations according to the second light source control information includes: controlling the light source assembly 110 to sequentially turn on each light-emitting unit to be turned on corresponding to the second round of detection according to the second turn-on sequence information to form multiple second lighting operations.

[0044] The number of light emitting units 112 included in the light source assembly 110 can be set according to the type of the object to be detected and the required detection accuracy. In one example, the light source assembly 110 includes 36 light emitting units 112; in another example, the light source assembly 110 includes 72 light emitting units 112. The number of all light emitting units to be turned on corresponding to the first round of detection and the second round of detection can be equal to the total number of light emitting units 112 included in the light source assembly 110, or can be less than the total number of light emitting units 112 included in the light source assembly 110.

[0045] In some embodiments, the total number of light-emitting units to be turned on corresponding to the second round of detection is equal to the total number of light-emitting units to be turned on corresponding to the first round of detection. For example, the light source assembly 110 includes 72 light-emitting units 112, and the total number of light-emitting units to be turned on corresponding to the first round of detection and the total number of light-emitting units to be turned on corresponding to the second round of detection are both 72.

[0046] In the above embodiment, the total number of light-emitting units to be turned on corresponding to the second round of detection is equal to the total number of light-emitting units to be turned on corresponding to the first round of detection, so that the number of second detection images obtained in the second round of detection is the same as the number of first detection images obtained in the first round of detection, ensuring that both the first round of detection and the second round of detection have high detection accuracy.

[0047] In some embodiments, the total number of light-emitting units to be turned on corresponding to the second round of detection is less than the total number of light-emitting units to be turned on corresponding to the first round of detection. For example, the light source assembly 110 includes 72 light-emitting units 112, the total number of light-emitting units to be turned on corresponding to the first round of detection is 72, and the total number of light-emitting units to be turned on corresponding to the second round of detection is 36. Since the surface defect detection of the battery module 200b after encapsulation is relatively easier to detect, the number of lighting and image acquisition times can be reduced in the second round of detection compared with the first round of detection, thereby speeding up the overall defect detection rhythm and improving production efficiency.

[0048] In some alternative embodiments, each light emitting unit 112 includes a plurality of light emitting elements of a plurality of colors. In this case, the first light source control information includes the first light color information corresponding to the first round of detection, the light emitting unit to be turned on corresponding to the first round of detection, and the first turn-on sequence information of each light emitting unit to be turned on in the first round of detection; the second light source control information includes the second light color information corresponding to the second round of detection, the light emitting unit to be turned on corresponding to the second round of detection, and the second turn-on sequence information of each light emitting unit to be turned on in the second round of detection.

[0049] At this time, step S120 of controlling the light source assembly 110 to perform multiple first lighting operations according to the first light source control information includes: controlling the light source assembly 110 to turn on each light-emitting unit to be turned on corresponding to the first round of detection in sequence according to the first turn-on sequence information, and controlling each light-emitting unit to be turned on corresponding to the first round of detection to generate the first color light when turned on according to the first light-emitting color information, so as to form multiple first lighting operations.

[0050] At this time, step S160 of controlling the light source assembly 110 to perform multiple second lighting operations according to the second light source control information includes: controlling the light source assembly 110 to turn on each light-emitting unit to be turned on corresponding to the second round of detection in sequence according to the second turn-on sequence information, and controlling each light-emitting unit to be turned on corresponding to the second round of detection to generate second color light when turned on according to the second light-emitting color information, so as to form multiple second lighting operations.

[0051] In some embodiments, the second color light is different from the first color light.

[0052] In some embodiments, the surface of the coated battery module 200 b has a blue film layer, the first color light is white light, and the second color light is blue light.

[0053] The surface of the battery module 200a before coating is a metal surface. In the first round of inspection, the light source assembly 110 is controlled to generate white light to facilitate the acquisition of a first inspection image that is more conducive to identifying surface defects. The surface of the battery module 200b after coating is a blue film layer. In the second round of inspection, the light source assembly 110 is controlled to generate blue light to facilitate the acquisition of a second inspection image that is more conducive to identifying surface defects.

[0054] In some alternative embodiments, the detection camera 120 is a multi-spectral camera; the first detection image is a color image; and the second detection image includes a color image and / or a black and white image.

[0055] In one example, the second detection image is a black and white image, that is, a black and white grayscale image.

[0056] In some alternative embodiments, each light-emitting unit 112 includes a plurality of light-emitting subunits 112s arranged in sequence from the through hole 111s to a direction away from the center of the through hole 111s. Each light-emitting subunit 112s includes at least one light-emitting element. The angles formed by the plurality of light-emitting subunits 112s in each light-emitting unit 112 and the plane where the detection station 130 is located are different from each other. Figure 1 In one example, each light-emitting unit 112 includes three light-emitting sub-units 112s, and the three light-emitting sub-units 112s arranged in sequence from the through hole 111s to a direction away from the center of the through hole 111s are located in a high angle position, a middle angle position, and a low angle position, respectively.

[0057] In some embodiments, the first light source control information includes the first light emitting angle information corresponding to the first round of detection, the light emitting unit to be turned on corresponding to the first round of detection, and the first turning on sequence information of each light emitting unit to be turned on in the first round of detection; the second light source control information includes the second light emitting angle information corresponding to the second round of detection, the light emitting unit to be turned on corresponding to the second round of detection, and the second turning on sequence information of each light emitting unit to be turned on in the second round of detection.

[0058] At this time, step S120 of controlling the light source assembly 110 to perform multiple first lighting operations according to the first light source control information includes: determining the first light-emitting sub-unit at the first angle from the multiple light-emitting sub-units 112s of each light-emitting unit 112 according to the first light-emitting angle information; and controlling the light source assembly 110 to sequentially turn on the first light-emitting sub-units of each light-emitting unit to be turned on corresponding to the first round of detection according to the first turn-on sequence information, so as to form multiple first lighting operations.

[0059] At this time, step S160 of controlling the light source assembly 110 to perform multiple second lighting operations according to the second light source control information includes: determining the second light-emitting sub-unit at the second angle from the multiple light-emitting sub-units 112s of each light-emitting unit 112 according to the second light-emitting angle information; and controlling the light source assembly 110 to sequentially turn on the second light-emitting sub-units of each light-emitting unit to be turned on corresponding to the second round of detection according to the second turn-on sequence information, so as to form multiple second lighting operations.

[0060] In some embodiments, the second angle is different from the first angle.

[0061] In the above embodiment, since the surface material of the battery module 200a before encapsulation is different from the surface material of the battery module 200b after encapsulation, the first light-emitting subunit at a first angle can be configured to emit light in the first round of detection, and the second light-emitting subunit at a second angle can be configured to emit light in the second round of detection, so that each round of detection has a light source with a more matching angle, which facilitates the acquisition of first detection images and second detection images that are easier to distinguish surface defects.

[0062] The present application also provides a defect detection control device for a battery module, which is used to control the appearance detection system to perform surface defect detection on the pre-coating battery module 200a and the post-coating battery module 200b. Figure 1 , Figure 2 The appearance inspection system includes a light source assembly 110 and an inspection camera 120. The light source assembly 110 includes a support 111 and a plurality of light-emitting units 112. The support 111 is bowl-shaped. The appearance inspection system is provided with an inspection station 130 on the concave side of the support 111. A through hole 111s is provided at the center of the support 111. A plurality of light-emitting units 112 are attached to the concave surface of the support 111 and are arranged around the through hole 111s. The inspection camera 120 is arranged at the through hole 111s.

[0063] Figure 6 The structure diagram of an embodiment of a defect detection control device for a battery module of the present application is shown in FIG. The defect detection control device for a battery module includes a first information determination module 610, a first lighting control module 620, a first camera control module 630, a first defect recognition module 640, a second information determination module 650, a second lighting control module 660, a second camera control module 670, and a second defect recognition module 680.

[0064] The first information determination module 610 is used to determine the first light source control information corresponding to the first round of detection after the pre-encapsulation battery module 200a is placed in the detection station 130.

[0065] The first lighting control module 620 is used to control the light source assembly 110 to perform multiple first lighting operations according to the first light source control information, wherein at least two first lighting operations correspond to different light-emitting units 112 being turned on.

[0066] The first camera control module 630 is used to control the inspection camera 120 to obtain at least one first inspection image of the pre-encapsulation battery module 200 a corresponding to each first lighting operation in each first lighting operation.

[0067] The first defect recognition module 640 is used to recognize appearance defects of the pre-encapsulation battery module 200 a based on all first detection images obtained in the first round of detection.

[0068] The second information determination module 650 is used to determine the second light source control information corresponding to the second round of detection after the coated battery module 200b is placed in the detection station 130.

[0069] The second lighting control module 660 is used to control the light source assembly 110 to perform multiple second lighting operations according to the second light source control information, wherein at least two second lighting operations correspond to different light-emitting units 112 being turned on.

[0070] The second camera control module 670 is used to control the inspection camera 120 to obtain at least one second inspection image of the encapsulated battery module 200 b corresponding to each second lighting operation in each second lighting operation.

[0071] The second defect recognition module 680 is used to recognize appearance defects of the coated battery module 200b based on all second detection images obtained in the second round of detection.

[0072] According to the defect detection control device of the battery module of the embodiment of the present application, the appearance detection system can be controlled to perform two rounds of detection. In the first round of detection, the pre-encapsulated battery module 200a is placed in the detection station 130. For the pre-encapsulated battery module 200a, the first camera control module 630 can control the detection camera 120 to obtain multiple first detection images, and then the first defect recognition module 640 performs appearance defect recognition on the pre-encapsulated battery module 200a based on all the first detection images obtained in the first round of detection, so as to realize the surface defect detection of the pre-encapsulated battery module 200a. In the second round of detection, the post-encapsulated battery module 200b is placed in the detection station 130. For the post-encapsulated battery module 200b, the second camera control module 670 can control the detection camera 120 to obtain multiple second detection images, and then the second defect recognition module 680 performs appearance defect recognition on the post-encapsulated battery module 200b based on all the second detection images obtained in the second round of detection, so as to realize the surface defect detection of the post-encapsulated battery module 200b. The defect detection control device of the embodiment of the present application can control the same appearance inspection system to perform surface defect inspection on the pre-encapsulation battery module 200a and the post-encapsulation battery module 200b, respectively, thereby reducing the battery production cost.

[0073] In the first round of detection, the light-emitting units 112 that are turned on in at least two first lighting operations are different from each other, and the first detection image corresponding to the light-emitting units 112 at different positions of the battery module 200a before packaging can be obtained, thereby improving the accuracy of surface defect detection of the battery module 200a before packaging. In the second round of detection, the light-emitting units 112 that are turned on in at least two second lighting operations are different from each other, and the second detection image corresponding to the light-emitting units 112 at different positions of the battery module 200b after packaging can be obtained, thereby improving the accuracy of surface defect detection of the battery module 200b after packaging.

[0074] An embodiment of the present application also provides an electronic device. Figure 7The hardware structure diagram of an embodiment of an electronic device of the present application is shown in FIG. The electronic device includes a memory 710 and at least one processor 720, the memory 710 stores instructions, and the at least one processor 720 calls the instructions in the memory 710 so that the electronic device executes the defect detection method of the battery module according to any of the aforementioned embodiments of the present application.

[0075] The defect detection method of the battery module controls the appearance detection system to perform surface defect detection on the battery module before coating and the battery module after coating respectively. The appearance detection system includes a light source assembly and a detection camera. The light source assembly includes a support and a plurality of light-emitting units. The support is bowl-shaped. The appearance detection system is provided with a detection station on the concave side of the support. A through hole is provided at the center of the support. The plurality of light-emitting units are attached to the concave surface of the support and are arranged around the through hole. The detection camera is arranged at the through hole. The defect detection method of the battery module includes: after the battery module before coating is placed at the detection station, first light source control information corresponding to the first round of detection is determined; according to the first light source control information, the light source assembly is controlled to perform multiple first lighting operations, wherein at least two first lighting operations correspond to the light-emitting units turned on mutually. different; in each first lighting operation, controlling the detection camera to obtain at least one first detection image for the battery module before packaging corresponding to each first lighting operation; based on all the first detection images obtained in the first round of detection, the appearance defects of the battery module before packaging are identified; after the battery module after packaging is placed in the detection station, determining the second light source control information corresponding to the second round of detection; according to the second light source control information, controlling the light source assembly to perform multiple second lighting operations, wherein at least two second lighting operations respectively correspond to different light-emitting units turned on; in each second lighting operation, controlling the detection camera to obtain at least one second detection image for the battery module after packaging corresponding to each second lighting operation; based on all the second detection images obtained in the second round of detection, the appearance defects of the battery module after packaging are identified.

[0076] Specifically, the processor 720 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0077] The memory 710 may include a large capacity memory 710 for data or instructions. By way of example and not limitation, the memory 710 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive, or a combination of two or more of these. Where appropriate, the memory 710 may include a removable or non-removable (or fixed) medium. Where appropriate, the memory 710 may be inside or outside the integrated gateway disaster recovery device. In a specific embodiment, the memory 710 is a non-volatile solid-state memory. In a specific embodiment, the memory 710 includes a read-only memory (ROM). Where appropriate, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or a flash memory, or a combination of two or more of these.

[0078] In one example, the control device may further include a communication interface 730 and a bus 740. The processor 720, the memory 710, and the communication interface 730 are connected via the bus 740 and communicate with each other.

[0079] The communication interface 730 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0080] Bus 740 includes hardware, software or both, and the parts of online data flow billing equipment are coupled to each other. For example, but not limitation, bus may include accelerated graphics port (AGP) or other graphics bus, enhanced industrial standard architecture (EISA) bus, front-end bus (FSB), hypertransport (HT) interconnection, industrial standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory 710 bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In appropriate cases, bus 740 may include one or more buses. Although the present application embodiment describes and shows a specific bus, the application considers any suitable bus or interconnection.

[0081] In addition, in combination with the defect detection method of the battery module in the above embodiment, the embodiment of the present application can provide a computer-readable storage medium for implementation. The computer-readable storage medium stores instructions, and when the instructions are executed by the processor, any one of the defect detection methods of the battery module in the above embodiment is implemented.

[0082] The defect detection method of the battery module controls the appearance detection system to perform surface defect detection on the battery module before coating and the battery module after coating respectively. The appearance detection system includes a light source assembly and a detection camera. The light source assembly includes a support and a plurality of light-emitting units. The support is bowl-shaped. The appearance detection system is provided with a detection station on the concave side of the support. A through hole is provided at the center of the support. The plurality of light-emitting units are attached to the concave surface of the support and are arranged around the through hole. The detection camera is arranged at the through hole. The defect detection method of the battery module includes: after the battery module before coating is placed at the detection station, first light source control information corresponding to the first round of detection is determined; according to the first light source control information, the light source assembly is controlled to perform multiple first lighting operations, wherein at least two first lighting operations correspond to the light-emitting units turned on mutually. different; in each first lighting operation, controlling the detection camera to obtain at least one first detection image for the battery module before packaging corresponding to each first lighting operation; based on all the first detection images obtained in the first round of detection, the appearance defects of the battery module before packaging are identified; after the battery module after packaging is placed in the detection station, determining the second light source control information corresponding to the second round of detection; according to the second light source control information, controlling the light source assembly to perform multiple second lighting operations, wherein at least two second lighting operations respectively correspond to different light-emitting units turned on; in each second lighting operation, controlling the detection camera to obtain at least one second detection image for the battery module after packaging corresponding to each second lighting operation; based on all the second detection images obtained in the second round of detection, the appearance defects of the battery module after packaging are identified.

[0083] The present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known methods is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0084] The functional blocks shown in the above block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0085] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0086] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A battery module defect detection method, characterized in that: The surface defects of the battery module before and after the coating are respectively inspected by controlling the appearance inspection system, the appearance inspection system includes a light source assembly and an inspection camera, the light source assembly includes a support and a plurality of light-emitting units, the support is bowl-shaped, the appearance inspection system is provided with an inspection station on the concave side of the support, a through hole is provided at the center of the support, the plurality of light-emitting units are attached to the concave surface of the support and are arranged around the through hole, the inspection camera is arranged at the through hole, and the defect detection method of the battery module includes: After the battery module is placed in the inspection station before coating, first light source control information corresponding to the first round of inspection is determined; Controlling the light source assembly to perform multiple first lighting operations according to the first light source control information, wherein at least two of the first lighting operations correspond to different light-emitting units turned on; In each first lighting operation, controlling the detection camera to obtain at least one first detection image of the pre-encapsulated battery module corresponding to each first lighting operation; Based on all the first detection images obtained in the first round of detection, the appearance defects of the battery module before encapsulation are identified; After the coated battery module is placed in the inspection station, determining the second light source control information corresponding to the second round of inspection; Controlling the light source assembly to perform multiple second lighting operations according to the second light source control information, wherein at least two of the second lighting operations correspond to different light-emitting units turned on; In each second lighting operation, controlling the inspection camera to obtain at least one second inspection image of the coated battery module corresponding to each second lighting operation; Based on all the second inspection images obtained in the second round of inspection, appearance defects of the coated battery module are identified.

2. The defect detection method of the battery module according to claim 1, characterized in that: The first light source control information includes the light-emitting units to be turned on corresponding to the first round of detection and the first turn-on sequence information of each light-emitting unit to be turned on in the first round of detection; the second light source control information includes the light-emitting units to be turned on corresponding to the second round of detection and the second turn-on sequence information of each light-emitting unit to be turned on in the second round of detection; The step of controlling the light source assembly to perform a plurality of first lighting operations according to the first light source control information comprises: Controlling the light source assembly to sequentially turn on the light-emitting units to be turned on corresponding to the first round of detection according to the first turn-on sequence information, so as to form multiple first lighting operations; The step of controlling the light source assembly to perform multiple second lighting operations according to the second light source control information includes: The light source assembly is controlled to sequentially turn on the light-emitting units to be turned on corresponding to the second round of detection according to the second turn-on sequence information, so as to form multiple second lighting operations.

3. The defect detection method of the battery module according to claim 2, characterized in that: The total number of light-emitting units to be turned on corresponding to the second round of detection is equal to the total number of light-emitting units to be turned on corresponding to the first round of detection.

4. The defect detection method of the battery module according to claim 2, characterized in that: The total number of light-emitting units to be turned on corresponding to the second round of detection is less than the total number of light-emitting units to be turned on corresponding to the first round of detection.

5. The defect detection method of the battery module according to claim 1, characterized in that: Each of the light-emitting units includes a plurality of light-emitting elements of a plurality of colors; the first light source control information includes first light color information corresponding to the first round of detection, the light-emitting units to be turned on corresponding to the first round of detection, and first turn-on sequence information of each light-emitting unit to be turned on in the first round of detection; the second light source control information includes second light color information corresponding to the second round of detection, the light-emitting units to be turned on corresponding to the second round of detection, and second turn-on sequence information of each light-emitting unit to be turned on in the second round of detection; The step of controlling the light source assembly to perform a plurality of first lighting operations according to the first light source control information comprises: Control the light source assembly to sequentially turn on each light-emitting unit to be turned on corresponding to the first round of detection according to the first turn-on sequence information, and control each light-emitting unit to be turned on corresponding to the first round of detection to generate a first color light when turned on according to the first light color information, so as to form multiple first lighting operations; The step of controlling the light source assembly to perform multiple second lighting operations according to the second light source control information includes: Control the light source assembly to sequentially turn on each light-emitting unit to be turned on corresponding to the second round of detection according to the second turn-on sequence information, and control each light-emitting unit to be turned on corresponding to the second round of detection to generate a second color light when turned on according to the second light color information, so as to form multiple second lighting operations; The second color light is different from the first color light.

6. The defect detection method of the battery module according to claim 5, characterized in that: The surface of the coated battery module has a blue film layer, the first color light is white light, and the second color light is blue light.

7. The defect detection method of the battery module according to claim 1, characterized in that: The detection camera is a multispectral camera; the first detection image is a color image; and the second detection image includes a color image and / or a black and white image.

8. The defect detection method of the battery module according to claim 1, characterized in that: Each of the light-emitting units comprises a plurality of light-emitting sub-units arranged in sequence from the through hole to a direction away from the center of the through hole, and the angles formed by the plurality of light-emitting sub-units in each of the light-emitting units and the plane where the detection station is located are different from each other; The first light source control information includes first light emitting angle information corresponding to the first round of detection, light emitting units to be turned on corresponding to the first round of detection, and first turn-on sequence information of each light emitting unit to be turned on in the first round of detection; the second light source control information includes second light emitting angle information corresponding to the second round of detection, light emitting units to be turned on corresponding to the second round of detection, and second turn-on sequence information of each light emitting unit to be turned on in the second round of detection; The step of controlling the light source assembly to perform a plurality of first lighting operations according to the first light source control information comprises: Determine a first light-emitting sub-unit located at a first angle from the plurality of light-emitting sub-units of each light-emitting unit according to the first light-emitting angle information; Controlling the light source assembly to sequentially turn on the first light-emitting sub-units of the light-emitting units to be turned on corresponding to the first round of detection according to the first turn-on sequence information, so as to form multiple first lighting operations; The step of controlling the light source assembly to perform multiple second lighting operations according to the second light source control information includes: Determine a second light-emitting sub-unit located at a second angle from the plurality of light-emitting sub-units of each light-emitting unit according to the second light-emitting angle information; Controlling the light source assembly to sequentially turn on the second light-emitting sub-units of each light-emitting unit to be turned on corresponding to the second round of detection according to the second turn-on sequence information, so as to form multiple second lighting operations; The second angle is different from the first angle.

9. A defect detection control device for a battery module, characterized in that: The surface defects of the battery module before and after the coating are respectively inspected by controlling the appearance inspection system, the appearance inspection system includes a light source assembly and an inspection camera, the light source assembly includes a support and a plurality of light-emitting units, the support is bowl-shaped, the appearance inspection system is provided with an inspection station on one side of the concave surface of the support, a through hole is provided at the center of the support, the plurality of light-emitting units are attached to the concave surface of the support and are arranged around the through hole, the inspection camera is arranged at the through hole, and the defect inspection control device of the battery module includes: A first information determination module, used to determine the first light source control information corresponding to the first round of detection after the pre-encapsulation battery module is placed in the detection station; A first lighting control module, used for controlling the light source assembly to perform multiple first lighting operations according to the first light source control information, wherein at least two of the first lighting operations correspond to different light-emitting units turned on; A first camera control module, used for controlling the detection camera to obtain at least one first detection image of the pre-encapsulated battery module corresponding to each first lighting operation in each first lighting operation; A first defect recognition module, used for identifying appearance defects of the pre-encapsulation battery module based on all the first detection images obtained in the first round of detection; A second information determination module, used to determine the second light source control information corresponding to the second round of detection after the coated battery module is placed in the detection station; A second lighting control module, used for controlling the light source assembly to perform multiple second lighting operations according to the second light source control information, wherein at least two of the second lighting operations correspond to different light-emitting units turned on; A second camera control module is used to control the detection camera to obtain at least one second detection image of the coated battery module corresponding to each second lighting operation in each second lighting operation; The second defect recognition module is used to identify appearance defects of the coated battery module based on all the second detection images obtained in the second round of detection.

10. An electronic device, characterized in that: The electronic device comprises a memory and at least one processor, wherein the memory stores instructions. The at least one processor calls the instructions in the memory so that the electronic device executes the battery module defect detection method as described in any one of claims 1 to 8.

11. A computer-readable storage medium having instructions stored thereon, characterized in that: When the instructions are executed by the processor, the defect detection method for the battery module as described in any one of claims 1 to 8 is implemented.

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