A method, system, electronic device and storage medium for detecting battery cell appearance

Abstract

The present disclosure relates to a method, system, electronic device and storage medium for detecting the appearance of a battery cell. The method for detecting the appearance of a battery cell includes: obtaining continuous frame images of the appearance of the battery cell to be detected; dividing a certain frame image in the continuous frame images into multiple image areas, and identifying appearance status information based on the multiple image areas; comparing the appearance status information with pre-stored qualified appearance status information to obtain appearance detection judgment information; repeatedly obtaining multiple appearance detection judgment information, and obtaining a judgment result based on whether the multiple appearance detection judgment information are the same. The present disclosure uses the technical means of multiple retests in the process of battery cell appearance detection, which effectively ensures the accuracy of the detection results; the basis of the detection judgment of the present disclosure is through classification and discrimination, and by comparing a large amount of data in the category, the number of misjudgments is effectively reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery cell appearance image processing, and in particular to a battery cell appearance detection method, system, electronic device, and storage medium. Background Art

[0002] A battery cell refers to a single electrochemical cell containing positive and negative electrodes and is generally not used directly. This differs from batteries, which contain protective circuitry and a casing and can be used directly. With the advancement of energy technology, existing electronic devices require mobile power sources such as batteries. Consequently, the supply chain of electronic device and electric vehicle manufacturers has seen a demand for battery cell assembly, placing increasing demands on the quality and performance of battery cell production lines. Increased production capacity is urgently needed. After battery cell production, many quality issues can be seen in the cell's appearance. Therefore, final visual inspection of the cell during the production process is a crucial method for controlling quality. Currently, many production lines still rely on manual visual inspection, with defective products manually rejected. While this inspection method is simple and easy to use, it suffers from low efficiency and high labor costs. Furthermore, manual inspection is subjective, which often leads to fluctuations and significant uncertainty in the visual quality inspection of battery cells, significantly reducing the accuracy of test results. Summary of the Invention

[0003] The present disclosure provides a method, system, electronic device, and storage medium for inspecting the appearance of a battery cell, which can solve at least one of the problems mentioned in the background art. To solve the above technical problems, the present disclosure provides the following technical solutions:

[0004] As one aspect of an embodiment of the present disclosure, a method for inspecting the appearance of a battery cell is provided, comprising the following steps:

[0005] S10, obtaining continuous frame images of the appearance of the battery cell to be inspected;

[0006] S20, dividing a frame image in the continuous frame image into multiple image regions, and identifying appearance status information based on the multiple image regions, the appearance status information including one or more of the following information: perfect image information, stain image information, scratch image information, demolding image information, concave-convex image information, liquid swelling image information, flatulence image information, deformation image information, and foreign matter image information;

[0007] S30, comparing the appearance state information with pre-stored qualified appearance state information to obtain appearance detection judgment information;

[0008] S40 , repeatedly executing steps S20 - S30 multiple times to obtain a plurality of appearance detection judgment information, and obtaining a judgment result based on whether the plurality of appearance detection judgment information are the same.

[0009] Optionally, step S40 further includes the following steps:

[0010] S50: Outputting information on removing cells with unqualified appearance according to the judgment result.

[0011] Optionally, determining whether the plurality of appearance detection judgment information are identical or not comprises the following steps:

[0012] If the first appearance detection judgment information obtained when steps S20-S30 are executed for the first time is the same as the second appearance detection judgment information obtained when steps S20-S30 are executed for the second time, the second appearance detection judgment information is used as the judgment result; otherwise, the third appearance detection judgment information obtained when steps S20-S30 are executed for the third time is compared with the first appearance detection judgment information and the second appearance detection judgment information. If it is the same as one of the aforementioned first appearance detection judgment information and the second appearance detection judgment information, the third appearance detection judgment information is used as the judgment result.

[0013] As another aspect of the embodiments of the present disclosure, a battery cell appearance inspection system is provided, comprising:

[0014] An appearance image acquisition module is used to acquire continuous frame images of the appearance of the battery cell to be inspected;

[0015] an appearance state recognition module, which divides a frame image from the continuous frame images into a plurality of image regions and obtains appearance state information based on the plurality of image regions, wherein the appearance state information includes one or more of the following: perfect image information, stain image information, scratch image information, demolding image information, concave-convex image information, liquid swelling image information, flatulence image information, deformation image information, or foreign body image information;

[0016] an appearance detection and judgment module, configured to compare the appearance state information with pre-stored qualified appearance state information to obtain appearance detection and judgment information;

[0017] The judgment result acquisition module is used to obtain a plurality of appearance detection judgment information and obtain a judgment result according to whether the plurality of appearance detection judgment information are the same.

[0018] Optionally, the battery cell appearance inspection system further includes a battery cell rejection module, configured to remove battery cells with unqualified appearance according to the judgment result.

[0019] Optionally, the judgment result acquisition module is also used to: when the first appearance detection judgment information obtained is the same as the second appearance detection judgment information, the second appearance detection judgment information is used as the judgment result; otherwise, the third appearance detection judgment information obtained is compared with the first appearance detection judgment information and the second appearance detection judgment information. If it is the same as one of the aforementioned first appearance detection judgment information and the second appearance detection judgment information, the third appearance detection judgment information is used as the judgment result.

[0020] As another aspect of an embodiment of the present disclosure, an electronic device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned method for inspecting the appearance of a battery cell when executing the computer program.

[0021] As another aspect of an embodiment of the present disclosure, a storage medium is provided, on which a computer program is stored. When the program is executed by a processor, the method for inspecting the appearance of a battery cell described above is implemented.

[0022] The present invention can replace manual inspection with machine inspection, effectively improving inspection efficiency and effectively reducing labor costs. Machine inspection is not a subjective activity and will not bring fluctuations and greater uncertainty to the appearance quality inspection of battery cells, thereby effectively improving the accuracy of inspection results. The present invention uses technical means of multiple retests in the inspection process, which effectively ensures the accuracy of the inspection results. The judgment basis of the present invention's inspection is through classification and discrimination, and through a large amount of comparative data in the category, the number of misjudgments is effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a flow chart of the method for inspecting the appearance of a battery cell according to Example 1 of the present disclosure;

[0024] Figure 2 This is a flow chart of a method for inspecting the appearance of a battery cell without removing the battery cell according to Example 1 of the present disclosure;

[0025] Figure 3 This is a schematic block diagram of a battery cell appearance inspection system according to Example 2 of the present disclosure. DETAILED DESCRIPTION

[0026] Various exemplary embodiments, features, and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.

[0027] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0028] The term "and / or" herein simply describes an association relationship between associated objects, indicating that three relationships can exist. For example, "A and / or B" can represent the existence of three situations: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" herein refers to any combination of at least two of any one or more of a plurality of items. For example, "at least one of A, B, and C" can represent any one or more elements selected from the set consisting of A, B, and C.

[0029] In addition, numerous specific details are provided in the following detailed description to better illustrate the present disclosure. Those skilled in the art will appreciate that the present disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art are not described in detail in order to highlight the main points of the present disclosure.

[0030] It can be understood that the above-mentioned various method embodiments mentioned in the present disclosure can be combined with each other to form combined embodiments without violating the principle logic. Due to space limitations, the present disclosure will not elaborate on them.

[0031] In addition, the present disclosure also provides a battery cell appearance inspection system, an electronic device, a computer-readable storage medium, and a program, all of which can be used to implement any battery cell appearance inspection method provided by the present disclosure. The corresponding technical solutions and descriptions are referred to the corresponding records in the method section and will not be repeated here.

[0032] The execution subject of a battery cell appearance inspection method may be a computer or other device capable of implementing battery cell appearance inspection. For example, the method may be executed by a terminal device, a server, or other processing device, wherein the terminal device may be a user equipment (UE), a mobile device, a user terminal, a terminal, a cellular phone, a cordless phone, a personal digital assistant (PDA), a handheld device, a computing device, an in-vehicle device, a wearable device, etc. In some possible implementations, the battery cell appearance inspection method may be implemented by a processor calling computer-readable instructions stored in a memory.

[0033] Example 1

[0034] As one aspect of the embodiments of the present disclosure, this embodiment provides a method for detecting the appearance of a battery cell, such as Figure 1 As shown, the following steps are included:

[0035] S10, obtaining continuous frame images of the appearance of the battery cell to be inspected;

[0036] S20, dividing a frame image in the continuous frame image into multiple image regions, and identifying appearance status information based on the multiple image regions, the appearance status information including one or more of the following information: perfect image information, stain image information, scratch image information, demolding image information, concave-convex image information, liquid swelling image information, flatulence image information, deformation image information, and foreign matter image information;

[0037] S30, comparing the appearance state information with pre-stored qualified appearance state information to obtain appearance detection judgment information;

[0038] S40 , repeatedly executing steps S20 - S30 multiple times to obtain a plurality of appearance detection judgment information, and obtaining a judgment result based on whether the plurality of appearance detection judgment information are the same.

[0039] Based on the above configuration, the battery cell appearance inspection method provided by the embodiment of the present disclosure replaces manual inspection with machine inspection, effectively improving inspection efficiency and effectively reducing labor costs. Machine inspection is not a subjective activity and will not bring fluctuations and large uncertainties to the appearance quality inspection of the battery cell, thereby effectively improving the accuracy of the inspection results. The technical means of multiple retests are used in the inspection process of the present disclosure, which effectively ensures the accuracy of the inspection results. The following is a detailed description of each step of the embodiment of the present disclosure:

[0040] S10, obtaining continuous frame images of the appearance of the battery cell to be inspected; wherein, in order to obtain the continuous frame images, an appearance image acquisition module may be used, and the appearance image acquisition module may include a camera, a memory, an image information processor, and a data communication module, and may also use a ready-made industrial camera module;

[0041] The camera is composed of a camera lens and a combined light source, and is used to continuously capture continuous frame images of the appearance of the battery cell to be inspected, with the shooting end of the camera lens forming a nearly vertical projection on the top of the battery cell to be inspected; the memory may be an integrated SD card, and is used to store the continuous frame images captured by the camera device; the image information processor is used to obtain the continuous frame images stored in the memory;

[0042] The data communication module is a wired transmission module or a wireless transmission module, and is used to transmit the appearance status information obtained by the image information processor to the outside.

[0043] S20, dividing a frame image in the continuous frame image into multiple image regions, and identifying appearance status information based on the multiple image regions, the appearance status information including one or more of the following information: perfect image information, stain image information, scratch image information, demolding image information, concave-convex image information, liquid swelling image information, flatulence image information, deformation image information, and foreign matter image information;

[0044] Among them, after obtaining continuous frame images, each frame image needs to be divided into multiple image areas first, so that different parts of the battery cell that are prone to defects can be identified. Each image area can be identified according to different appearance status information, so that different appearance status information that is prone to appear in the battery cell can be obtained. For example, the appearance status information includes perfect image information, stain image information, scratch image information, demolding image information, concave and convex image information, liquid swelling image information, flatulence image information, deformation image information, foreign matter image information and other abnormal or defective appearance states.

[0045] S30, comparing the appearance state information with pre-stored qualified appearance state information to obtain appearance detection judgment information;

[0046] Among them, if the appearance status information identified by S20 belongs to a defective or abnormal battery cell appearance, the identified appearance status information will be compared with the normal pre-stored qualified appearance status information. For example, if the identified appearance status information is concave-convex image information, the concave-convex image information will be compared with the normal qualified appearance status information (battery cell appearance without concave-convex). If the difference between the two is within a preset range, that is, the degree of concave-convexity is not so great as to be deemed to affect sales or performance safety, etc., it will be corrected to a normal appearance. If the difference between the two is not within the preset qualified range, the appearance detection judgment information is determined to be an unqualified state.

[0047] S40, repeatedly executing steps S20-S30 multiple times to obtain multiple appearance detection judgment information, and obtaining a judgment result based on whether the multiple appearance detection judgment information are the same. The image frames selected when executing S20 multiple times are image frames at different times.

[0048] In some embodiments, determining whether the plurality of appearance detection information are identical to each other comprises the following steps:

[0049] If the first appearance detection judgment information obtained when steps S20-S30 are executed for the first time is the same as the second appearance detection judgment information obtained when steps S20-S30 are executed for the second time, the second appearance detection judgment information is used as the judgment result; otherwise, the third appearance detection judgment information obtained when steps S20-S30 are executed for the third time is compared with the first appearance detection judgment information and the second appearance detection judgment information. If it is the same as one of the aforementioned first appearance detection judgment information and the second appearance detection judgment information, the third appearance detection judgment information is used as the judgment result; as an alternative implementation method, steps S20-S30 can be repeated more than three times, such as 4-10 times, and the judgment information with the most identical results is selected as the final judgment result.

[0050] In some embodiments, as Figure 2 As shown, the step S40 further includes the following steps:

[0051] S50: Outputting information for removing the battery cells that do not meet the appearance standards based on the judgment result. For example, if the judgment result is that the battery cells do not meet the appearance standards, outputting information for removing the battery cells that do not meet the appearance standards, and the removal method can be automatic removal, such as robotic grasping or pneumatic push rod pushing out the battery cells.

[0052] Example 2

[0053] As another aspect of the embodiment of the present disclosure, this embodiment provides a battery cell appearance inspection system 100, such as Figure 3 Shown, including:

[0054] Appearance image acquisition module 1, used to acquire continuous frame images of the appearance of the battery cell to be inspected; wherein, in order to acquire the continuous frame images, an appearance image acquisition module can be used, and the appearance image acquisition module can include a camera, a memory, an image information processor and a data communication module, and can also use a ready-made industrial camera module;

[0055] The camera is composed of a camera lens and a combined light source, and is used to continuously capture continuous frame images of the appearance of the battery cell to be inspected, with the shooting end of the camera lens forming a nearly vertical projection on the top of the battery cell to be inspected; the memory may be an integrated SD card, and is used to store the continuous frame images captured by the camera device; the image information processor is used to obtain the continuous frame images stored in the memory;

[0056] The data communication module is a wired transmission module or a wireless transmission module, and is used to transmit the appearance status information obtained by the image information processor to the outside.

[0057] an appearance state recognition module 2, which divides a frame image from the continuous frame images into a plurality of image regions and obtains appearance state information based on the plurality of image regions, wherein the appearance state information includes one or more of the following: perfect image information, stain image information, scratch image information, demolding image information, concave-convex image information, liquid swelling image information, flatulence image information, deformation image information, or foreign body image information;

[0058] Among them, after obtaining continuous frame images, each frame image needs to be divided into multiple image areas first, so that different parts of the battery cell that are prone to defects can be identified. Each image area can be identified according to different appearance status information, so that different appearance status information that is prone to appear in the battery cell can be obtained. For example, the appearance status information includes perfect image information, stain image information, scratch image information, demolding image information, concave and convex image information, liquid swelling image information, flatulence image information, deformation image information, foreign matter image information and other abnormal or defective appearance states.

[0059] The appearance detection and judgment module 3 is used to compare the appearance status information with the pre-stored qualified appearance status information to obtain appearance detection and judgment information; wherein, if the appearance status information identified by the appearance status recognition module 2 belongs to a defective or abnormal battery cell appearance, the identified appearance status information is compared with the normal pre-stored qualified appearance status information. For example, if the identified appearance status information is concave-convex image information, the concave-convex image information is compared with the normal qualified appearance status information (battery cell appearance without concave-convex). If the difference between the two is within a preset range, that is, the degree of concave-convexity is not so great as to be deemed to affect sales or performance safety, etc., it will be corrected to a normal appearance. If the difference between the two is not within the preset qualified range, the appearance detection and judgment information is determined to be an unqualified state.

[0060] The judgment result acquisition module 4 is configured to obtain a plurality of the appearance detection judgment information and determine a judgment result based on whether the plurality of appearance detection judgment information are identical. In some embodiments, the judgment result acquisition module 4 is further configured to: if the first appearance detection judgment information obtained for the first time is identical to the second appearance detection judgment information obtained for the second time, use the second appearance detection judgment information as the judgment result; otherwise, compare the third appearance detection judgment information obtained for the third time with the first appearance detection judgment information and the second appearance detection judgment information; if the third appearance detection judgment information is identical to one of the first appearance detection judgment information and the second appearance detection judgment information, use the third appearance detection judgment information as the judgment result; as an alternative embodiment, the number of repetitions may also be greater than three times, such as 4-10 times, and the judgment information with the most identical results is selected as the final judgment result.

[0061] In some embodiments, the battery cell appearance inspection system 100 further includes a battery cell rejection module 5 for removing battery cells with unqualified appearances based on the judgment result. For example, if the judgment result is that the battery cell appearance is unqualified, the unqualified battery cell is removed. The removal method can be automatic removal, such as robotic grasping or pneumatic push rod pushing to remove the unqualified battery cell.

[0062] Example 3

[0063] An electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the battery cell appearance detection method in Example 1 is implemented.

[0064] Embodiment 3 of the present disclosure is merely an example and should not limit the functions and scope of use of the embodiments of the present disclosure.

[0065] The electronic device may be in the form of a general-purpose computing device, such as a server device. Components of the electronic device may include, but are not limited to, at least one processor, at least one memory, and a bus connecting different system components (including the memory and the processor).

[0066] The bus includes data bus, address bus and control bus.

[0067] The memory may include volatile memory, such as random access memory (RAM) and / or cache memory, and may further include read-only memory (ROM).

[0068] The memory may also include a program tool having a set (at least one) of program modules, such program modules including but not limited to: an operating system, one or more application programs, other program modules and program data, each of which or some combination may include an implementation of a network environment.

[0069] The processor executes computer programs stored in the memory to perform various functional applications and process data.

[0070] The electronic device may also communicate with one or more external devices (e.g., a keyboard, a pointing device, etc.). Such communication may be performed via an input / output (I / O) interface. Furthermore, the electronic device may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) via a network adapter. The network adapter communicates with other modules of the electronic device via a bus. It should be understood that, although not shown in the figures, other hardware and / or software modules may be used in conjunction with the electronic device, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (RAID) systems, tape drives, and data backup storage systems.

[0071] It should be noted that although several units / modules or sub-units / modules of the electronic device are mentioned in the above detailed description, this division is merely exemplary and not mandatory. In fact, depending on the embodiment of the present application, the features and functions of two or more units / modules described above can be embodied in one unit / module. Conversely, the features and functions of one unit / module described above can be further divided and embodied by multiple units / modules.

[0072] Example 4

[0073] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the battery cell appearance inspection method in Example 1.

[0074] The readable storage medium may include, but is not limited to, a portable disk, a hard disk, a random access memory, a read-only memory, an erasable programmable read-only memory, an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0075] In a possible implementation, the present disclosure can also be implemented in the form of a program product, which includes program code. When the program product is run on a terminal device, the program code is used to enable the terminal device to execute the steps of the battery cell appearance detection method described in Example 1.

[0076] The program code for executing the present disclosure may be written in any combination of one or more programming languages, and may be executed entirely on the user device, partially on the user device, as a standalone software package, partially on the user device and partially on a remote device, or entirely on the remote device.

[0077] Although the embodiments of the present disclosure have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the present disclosure, and the scope of the present disclosure is defined by the appended claims and their equivalents.

Claims

1. A method for detecting the appearance of a battery cell, characterized in that: The steps include: S10, obtaining continuous frame images of the appearance of the battery cell to be inspected; S20, dividing a frame image in the continuous frame image into a plurality of image regions, and identifying appearance status information based on the plurality of image regions, the appearance status information including one or more of the following: perfect image information, stain image information, scratch image information, demolding image information, concave-convex image information, liquid swelling image information, flatulence image information, deformation image information, or foreign body image information; S30, comparing the appearance state information with pre-stored qualified appearance state information to obtain appearance detection judgment information; S40. Repeat steps S20-S30 multiple times to obtain multiple appearance detection judgment information, and draw a judgment result based on whether the multiple appearance detection judgment information are the same; including: if the first appearance detection judgment information obtained when steps S20-S30 are executed for the first time is the same as the second appearance detection judgment information obtained when steps S20-S30 are executed for the second time, the second appearance detection judgment information is used as the judgment result; otherwise, the third appearance detection judgment information obtained when steps S20-S30 are executed for the third time is compared with the first appearance detection judgment information and the second appearance detection judgment information. If the third appearance detection judgment information is the same as one of the first appearance detection judgment information and the second appearance detection judgment information, the third appearance detection judgment information is used as the judgment result.

2. The method for detecting the appearance of a battery cell according to claim 1, wherein: After step S40, the following steps are also included: S50: Outputting information on removing cells with unqualified appearance according to the judgment result.

3. A battery cell appearance inspection system applied to the battery cell appearance inspection method according to any one of claims 1 to 2, characterized in that: include: An appearance image acquisition module is used to acquire continuous frame images of the appearance of the battery cell to be inspected; an appearance state recognition module, which divides a frame image from the continuous frame images into a plurality of image regions and obtains appearance state information based on the plurality of image regions, wherein the appearance state information includes one or more of the following: perfect image information, stain image information, scratch image information, demolding image information, concave-convex image information, liquid swelling image information, flatulence image information, deformation image information, or foreign body image information; an appearance detection and judgment module, configured to compare the appearance state information with pre-stored qualified appearance state information to obtain appearance detection and judgment information; The judgment result acquisition module is used to obtain a plurality of appearance detection judgment information and obtain a judgment result according to whether the plurality of appearance detection judgment information are the same.

4. The battery cell appearance inspection system according to claim 3, wherein: The battery cell appearance inspection system further includes a battery cell rejection module, which is used to remove battery cells with unqualified appearance according to the judgment result.

5. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the method according to any one of claims 1 to 2 is implemented.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 2 is implemented.

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