Image acquisition device for battery appearance defect detection and battery inspection equipment

Abstract

The invention relates to the technical field of battery detection, in particular to an image acquisition device for battery appearance defect detection and battery inspection equipment, the image acquisition device comprises image acquisition equipment, and the image acquisition equipment is located at one side of a power battery module and is used for acquiring image information of the side; the image acquisition equipment comprises a first acquisition structure and a second acquisition structure, the image information comprises whole-surface image information and local image information of a plurality of set positions, the first acquisition structure is used for acquiring the whole-surface image information, and the second acquisition structure is used for acquiring the local image information of the plurality of set positions. According to the technical scheme provided by the invention, the image information (more than 50 images) of each surface of the power battery module and the local detail position of each surface is acquired, so that the shooting effects of the surfaces with different structural shapes and different materials are clear and uniform, the image information can highlight defect items needing to be detected, and the images can be conveniently analyzed and identified.

Description

Technical Field

[0001] The present invention relates to the technical field of battery detection, and particularly relates to an image acquisition device for detecting battery appearance defects and a battery inspection device. Background Art

[0002] The power battery module is relatively large in size and weight. At present, its appearance inspection mainly relies on manual inspection. During the inspection process, each surface of the power battery module needs to be inspected. Each surface of the power battery module has different materials and surface treatment methods, and includes multiple fine structures. More than 30 defect items need to be detected. If manual inspection is adopted, not only the labor intensity is high, but also the requirements for personnel inspection are relatively high, and it is very easy to miss some inspections. Summary of the Invention

[0003] To solve at least the above technical problems in the prior art, the present invention provides an image acquisition device for detecting battery appearance defects and a battery inspection device.

[0004] On the one hand, the present invention provides an image acquisition device for detecting battery appearance defects, including an image acquisition device, which is located on one side of the power battery module and is used to obtain the image information of this side; the image acquisition device includes a first acquisition structure and a second acquisition structure, the image information includes the whole-surface image information and the local image information of multiple set positions, the first acquisition structure is used to obtain the whole-surface image information, and the second acquisition structure is used to obtain the local image information of multiple set positions.

[0005] In some embodiments, the power battery module is cuboid-shaped, including a top surface, a bottom surface, two side surfaces and two end surfaces. Among them, end panels are respectively stacked on the two end surfaces; the first acquisition structure includes a first camera assembly, and the second acquisition structure includes a second camera assembly; the first camera assembly is connected to a first moving module, and the first camera assembly acquires the whole-surface image information of the end panel of the power battery module under the drive of the first moving module; the second camera assembly is connected to a second moving module, and the second camera assembly acquires the local image information of multiple set positions under the drive of the second moving module.

[0006] In some embodiments, the first acquisition structure further includes a side camera assembly, and the second acquisition structure further includes a third camera assembly. The side camera assembly and the third camera assembly are connected to a third moving module; the side camera assembly is used to acquire the whole-surface image information of the side surface of the power battery module, and the third camera assembly is used to acquire the local image information of multiple set positions on the side surface of the end panel of the power battery module.

[0007] In some embodiments, the first acquisition structure further includes a top surface camera assembly, and the second acquisition structure further includes a fourth camera assembly. The top surface camera assembly and the fourth camera assembly are connected to a fourth moving module. The top surface camera assembly is configured to acquire the full-surface image information of the top surface of the power battery module, and the fourth camera assembly is configured to acquire the local image information of a plurality of set positions on the top surface of the end panel of the power battery module.

[0008] In some embodiments, the first acquisition structure further includes a bottom surface camera assembly, and the bottom surface camera assembly is connected to a fifth moving module. The bottom surface camera assembly is configured to acquire the full-surface image information of the bottom surface of the power battery module.

[0009] In some embodiments, the first camera assembly further includes a bottom surface light supplement structure. The first camera assembly is further configured to acquire the local image information of a plurality of set positions on the bottom surface of the end panel under the drive of the first moving module.

[0010] In some embodiments, the first camera assembly, the second camera assembly, the third camera assembly, and the fourth camera assembly are area array camera structures; the side surface camera assembly, the top surface camera assembly, and the bottom surface camera assembly are line scan camera structures.

[0011] In some embodiments, the first moving module, the second moving module, the third moving module, the fourth moving module, and the fifth moving module are three-dimensional moving modules.

[0012] In some embodiments, the full-surface image information and / or the local image information includes image information of multiple different exposure levels.

[0013] On the other hand, the present invention further provides a battery inspection device, including the image acquisition device for detecting the appearance defects of the battery described above.

[0014] For the image acquisition device for detecting the appearance defects of the battery and the battery inspection device provided by the present invention, when detecting each surface of the battery, the front image information is obtained through the first acquisition structure, and the local image information can also be obtained through the second acquisition structure. The acquisition position of the local image information can be set according to the structural characteristics of the current surface. The technical solution of the present invention acquires the image information of each surface and the local detail positions of each surface of the power battery module (more than 50 images), ensures that the shooting effects of surfaces with different structural shapes and different materials are clear and uniform, and the image information can highlight the defect items to be detected, facilitating the analysis and recognition of the images. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features, and advantages of the exemplary embodiments of the present invention will become readily understandable. In the drawings, several embodiments of the present invention are shown in an exemplary rather than restrictive manner, wherein:

[0016] In the drawings, the same or corresponding reference numerals denote the same or corresponding parts.

[0017] Figure 1 FIG. is a schematic diagram of image acquisition of an image acquisition device for detecting battery appearance defects provided by an embodiment of the present invention;

[0018] Figure 2 FIG. is a schematic diagram of the structure of a battery detected by an image acquisition device for detecting battery appearance defects provided by an embodiment of the present invention;

[0019] Figure 3 FIG. is a schematic diagram of the structure of a first camera assembly in an image acquisition device for detecting battery appearance defects provided by an embodiment of the present invention;

[0020] Figure 4 FIG. is a schematic diagram of the structure of a second camera assembly in an image acquisition device for detecting battery appearance defects provided by an embodiment of the present invention;

[0021] Figure 5 FIG. is a schematic diagram of the structure of a side camera assembly and a third camera assembly in an image acquisition device for detecting battery appearance defects provided by an embodiment of the present invention;

[0022] Figure 6 FIG. is a schematic diagram of the structure of a top camera assembly and a fourth camera assembly in an image acquisition device for detecting battery appearance defects provided by an embodiment of the present invention;

[0023] Figure 7 FIG. is a schematic diagram of the structure of a bottom camera assembly in an image acquisition device for detecting battery appearance defects provided by an embodiment of the present invention.

[0024] In the figure:

[0025] 10: Image acquisition device; 20: Power battery module;

[0026] 11: First acquisition structure; 12: Second acquisition structure;

[0027] 111: First camera assembly; 112: First moving module; 113: Side camera assembly; 114: Top camera assembly; 115: Fourth moving module; 116: Bottom camera assembly; 117: Fifth moving module; 118: Bottom light supplement structure;

[0028] 121: Second camera assembly; 122: Second moving module; 123: Third camera assembly; 124: Third moving module; 125: Fourth camera assembly;

[0029] 21: End panel. Detailed implementation manners

[0030] To make the objectives, features, and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0031] An image acquisition device for detecting battery appearance defects provided in an embodiment of the present invention includes an image acquisition device, which is located at the side end of the battery and is used to acquire image information of this side. Among them, the image acquisition device includes a first acquisition structure and a second acquisition structure, and the first acquisition structure and the second acquisition structure acquire the entire surface image information and local image information of the current side of the power battery module in sequence or synchronously.

[0032] Hereinafter, the structures of the components, the connection relationships, and the position relationships of the components of the image acquisition device for detecting battery appearance defects provided in the embodiments of the present invention will be described in detail.

[0033] As Figure 1 and Figure 2 shown, in the embodiment of the present invention, the first acquisition structure 11 is used to acquire the entire surface image information, and the second acquisition structure 12 is used to acquire the local image information. Among them, the entire surface image information includes the overall image information of the current surface of the power battery module 20. For example, in the overall image information, the exposure of the first acquisition structure 11 can also be adjusted to obtain the overall image information with different exposures. The local image information is the image information of multiple set positions. Compared with the overall image information, the image information of the set positions has a higher resolution. Similarly, the exposure of the second acquisition structure 12 can be adjusted to obtain the local image information with different exposures.

[0034] When acquiring the local image information, the set positions can be the set positions on each surface of the power battery module 20. For example, the corner positions, the positions where the structural members are located, or the connection positions, etc. Or, the set positions can be the positions determined for the current product. For example, the set position on one side of the power battery module 20 is the high-incidence position of abnormal items, and the image information of this position needs to be acquired.

[0035] For example, the power battery module 20 is in a cuboid shape, including a top surface, a bottom surface, two side surfaces, and two end surfaces. Among them, end face plates 21 are respectively stacked on the two end surfaces; the image acquisition device 10 is respectively located on each surface to collect image information. In the embodiment of the present invention, the shape of the power battery module 20 is not limited to this, and it can also be other shapes, and the image acquisition device 10 can collect images of each surface of the power battery module 20.

[0036] As Figure 3 shown, in the embodiment of the present invention, the first acquisition structure 11 includes a first camera assembly 111, and the first camera assembly 111 is connected to the first moving module 112. The first camera assembly 111 collects the entire surface image information of the end face plate 21 of the power battery module 20 under the drive of the first moving module 112.

[0037] For example, the first camera assembly 111 includes a first end face area array camera assembly, and the first moving module 112 is a three-dimensional moving module. The first end face area array camera assembly moves along a set path under the drive of the three-dimensional moving module. After adjusting the first end face area array camera assembly to a specified position, the image information acquisition operation is completed. For example, the lens of the first end face area array camera assembly is arranged parallel to the end face plate 21 of the power battery module 20, and the linear distance between the two is between 290 mm and 310 mm. For example, the three-dimensional moving module includes an X-direction linear moving module, a Y-direction linear moving module, and a Z-direction linear moving module, which can drive the first end face area array camera assembly to move freely in the XYZ three directions. For example, the linear moving module is a linear ball screw moving module.

[0038] In the embodiment of the present invention, the first end face area array camera assembly collects the entire surface image information with at least two exposure levels. For example, the exposure levels are high exposure and low exposure, and the specific exposure values are not limited. Among the entire surface image information obtained by the first end face area array camera assembly, it is used to judge whether there is glue overflow or foreign matter in the assembly holes on the end faces of the power battery module 20, as well as defect items such as scratches, dirt, or stains.

[0039] As Figure 4 shown, in the embodiment of the present invention, the second acquisition structure 12 includes a second camera assembly 121, and the second camera assembly 121 is connected to the second moving module 122. The second camera assembly 121 collects local image information at multiple set positions under the drive of the second moving module 122.

[0040] For example, the second camera assembly 121 includes a second end-face area array camera assembly. Among them, the first end-face area array camera assembly is a large-field-of-view camera assembly, mainly used to obtain the entire surface image information of the end face of the power battery module 20. The second end-face area array camera assembly is a small-field-of-view camera assembly, mainly used to obtain local image information. For example, the positions of the local image information include the four corners of the end face of the power battery module 20 and the structural parts (such as the connector position, the assembly gap, etc.). For example, the lens of the second end-face area array camera assembly is arranged parallel to the end panel 21 of the power battery module 20, and the linear distance between the two is between 240 mm and 260 mm. The end face of the power battery module 20 is judged for defects such as glue overflow, foreign objects, scratches, dirt, or missing parts through the local image information.

[0041] For example, the second moving module 122 is a three-dimensional moving module. The three-dimensional moving module includes an X-direction linear moving module, a Y-direction linear moving module, and a Z-direction linear moving module, which can drive the second end-face area array camera assembly to move freely in the XYZ three directions. For example, the linear moving module is a linear lead screw moving module.

[0042] On the end face of the power battery module 20, when there is sufficient space, the first camera assembly 111 and the second camera assembly 121 can be set at the same time, or the first camera assembly 111 and the second camera assembly 121 can be separately arranged on two workstations to sequentially complete the acquisition of the entire surface and local image information of the end face.

[0043] In the embodiment of the present invention, the power battery module 20 includes at least one end face. For example, when the power battery module 20 is in the shape of a cuboid, it includes two end faces. When collecting the image information of multiple end faces, the first camera assembly 111 and the second camera assembly 121 can be set on each end face side, or a set of the first camera assembly 111 and the second camera assembly 121 can be set. By rotating the power battery module 20, the end faces are sequentially rotated to the image acquisition position, that is, opposite to the first camera assembly 111 and the second camera assembly 121, so as to complete the acquisition of the end face image information.

[0044] As Figure 5 shown, in the embodiment of the present invention, the first acquisition structure 11 further includes a side camera assembly 113, and the second acquisition structure 12 further includes a third camera assembly 123. The side camera assembly 113 is used to collect the entire surface image information of the side of the power battery module 20, and the third camera assembly 123 is used to collect the local image information of multiple set positions on the side of the end panel 21 of the power battery module 20. For example, the side camera assembly 113 is a side line scan camera assembly, and the third camera assembly 123 is a third end-face area array camera assembly. The entire surface image information of the side of the power battery module 20 is obtained through the side line scan camera assembly, and the local image information of the side of the power battery module 20 is obtained through the third end-face area array camera assembly.

[0045] In an embodiment of the present invention, the side camera assembly 113 and the third camera assembly 123 are connected to the third moving module 124. For example, the third moving module 124 is a three-dimensional moving module, and a bracket is arranged on the three-dimensional moving module. The side camera assembly 113 and the third camera assembly 123 are respectively arranged on the bracket. For example, the three-dimensional moving module includes an X-direction linear moving module, a Y-direction linear moving module, and a Z-direction linear moving module, which can drive the third end face array camera assembly to freely move in the XYZ three directions. For example, the linear moving module is a linear lead screw moving module.

[0046] Continue to refer to Figure 5 As shown, for example, the Y-direction linear moving module has a set length and is arranged along the length direction of the power battery module 20. The side camera assembly 113 moves along the Y-direction linear moving module to complete the acquisition of the entire surface image information. The X-direction linear moving module is used to adjust the linear distance between the side camera assembly 113 and the third camera assembly 123 and the side of the power battery module 20, and the Z-direction linear moving module is used to adjust the relative height between the side camera assembly 113 and the third camera assembly 123 and the side of the power battery module 20.

[0047] For example, the distance between the lenses of the side camera assembly 113 and the third camera assembly 123 and the side of the power battery module 20 is 240 mm to 260 mm. The entire surface image information with at least two exposure levels is acquired by the side surface array camera assembly. Among the entire surface image information obtained by the side surface array camera assembly, it is used to judge whether there are defects such as scratches, pits, deformations, or damage to the insulating film on the side of the power battery module 20; the local image information includes the side image information of the end panel 21, and whether there are defects such as insulating film breakage, warping, dirt, stains, foreign objects, or breakage on the side of the power battery module 20 and the side of the end panel 21 is judged through the local image information.

[0048] In an embodiment of the present invention, the power battery module 20 includes multiple sides. When acquiring the multiple side image information (the entire surface and the local), it can be completed by multiple groups of side camera assemblies 113 and third camera assemblies 123, or the angle of the power battery module 20 is rotated so that each side of the power battery module 20 is sequentially adjusted to face the same group of side camera assemblies 113 and third camera assemblies 123, thereby sequentially completing the acquisition of the side image information.

[0049] Such as Figure 6As shown in the figure, in the embodiment of the present invention, the first acquisition structure 11 further includes a top surface camera assembly 114, the second acquisition structure 12 further includes a fourth camera assembly 125, and the top surface camera assembly 114 and the fourth camera assembly 125 are connected to a fourth moving module 115; the top surface camera assembly 114 is used to acquire the full-surface image information of the top surface of the power battery module 20, and the fourth camera assembly 125 is used to acquire the local image information of multiple set positions on the top surface of the end panel 21 of the power battery module 20. For example, the top surface camera assembly 114 is a top surface line scan camera assembly, and the fourth camera assembly 125 is a fourth end surface area array camera assembly. The full-surface image information of the top surface of the power battery module 20 is obtained through the top surface line scan camera assembly, and the local image information of the top surface of the power battery module 20 is obtained through the fourth end surface area array camera assembly.

[0050] In the embodiment of the present invention, the top surface camera assembly 114 and the fourth camera assembly 125 are connected to the fourth moving module 115; for example, the fourth moving module 115 is a three-dimensional moving module, a bracket is provided on the three-dimensional moving module, and the top surface camera assembly 114 and the fourth camera assembly 125 are respectively provided on the bracket. For example, the three-dimensional moving module includes an X-direction linear moving module, a Y-direction linear moving module, and a Z-direction linear moving module, which can drive the fourth end surface area array camera assembly to move freely in the XYZ three directions. For example, the linear moving module is a linear lead screw moving module.

[0051] Continue to refer to Figure 6 As shown in the figure, for example, the Y-direction linear moving module has a set length and is arranged along the length direction of the power battery module 20, and the top surface camera assembly 114 moves along the Y-direction linear moving module to complete the acquisition of the full-surface image information. The X-direction linear moving module is used to adjust the relative height between the top surface camera assembly 114 and the fourth camera assembly 125 and the top surface of the power battery module 20, and the Z-direction linear moving module is used to adjust the linear distance between the top surface camera assembly 114 and the fourth camera assembly 125 and the top surface of the power battery module 20.

[0052] For example, the distance between the lenses of the top surface camera assembly 114 and the fourth camera assembly 125 and the top surface of the power battery module 20 is 280 mm to 320 mm. The full-surface image information of at least two exposure levels is acquired through the top surface area array camera assembly. Among the full-surface image information obtained by the top surface area array camera assembly, it is used to judge whether there are defects such as improper upper cover installation, scratches, dirt, foreign objects, or label defects on the top surface of the power battery module 20; the local image information includes the top surface image information of the end panel 21, and through the local image information, it is judged whether there are defects such as scratches, breakages, hole misalignments, foreign objects, missing threads, scratches and knocks on the installation holes, and foreign objects on the end panel 21 on the top surface of the power battery module 20 and the top surface of the end panel 21.

[0053] As Figure 7As shown in the figure, in the embodiment of the present invention, the first acquisition structure 11 further includes a bottom surface camera assembly 116, and the bottom surface camera assembly 116 is connected to a fifth moving module 117; the bottom surface camera assembly 116 is used to acquire the entire surface image information of the bottom surface of the power battery module 20. For example, the bottom surface camera assembly 116 is a bottom surface line scan camera assembly, and the fifth moving module 117 includes a linear moving module. For example, the linear moving module is a linear lead screw module. The bottom surface line scan camera assembly is connected to the fifth moving module 117 through a bracket. The fifth moving module 117 has a set length and is arranged along the length direction of the power battery module 20, and the entire surface image information of the bottom surface of the power battery module 20 is obtained through the bottom surface camera assembly 116.

[0054] As Figure 3 As shown in the figure, in the embodiment of the present invention, the first camera assembly 111 further includes a bottom surface light supplement structure 118; the first camera assembly 111 is further used to acquire local image information of multiple set positions on the bottom surface of the end panel 21 under the drive of the first moving module 112. Through the cooperation of the first camera assembly 111 and the first moving module 112, the local image information on the bottom surface of the end panel 21 is retaken.

[0055] Among them, the retaking process can be after the first camera assembly 111 completes the acquisition of the end face image information of the end panel 21, or after the bottom surface camera assembly 116 acquires the bottom surface image information of the power battery module 20. For example, it can be determined according to the moving stroke of the power battery module 20.

[0056] In the embodiment of the present invention, among the entire surface image information obtained through the bottom surface camera assembly 116, it includes the entire surface image information of multiple different exposure degrees, such as high-exposure entire surface image information and low-exposure entire surface image information. The entire surface image information is used to judge whether there are defects such as bottom film wrinkles, bubbles or bumps, as well as pits, dirt or foreign objects on the bottom surface of the power battery module 20. The local image information is used to judge whether there are defects such as installation hole scratches, bumps or foreign objects on the bottom surface of the power battery module 20 and the bottom surface of the end panel 21, as well as foreign objects on the end panel 21 and so on.

[0057] In the embodiment of the present invention, through the above-mentioned first camera assembly 111, second camera assembly 121, third camera assembly 123 and fourth camera assembly 125, as well as the side camera assembly 113, top surface camera assembly 114 and bottom surface camera assembly 116, the acquisition of the entire surface image information and local image information of each surface of the power battery module 20 is completed.

[0058] The acquired image information is sent to an image analysis device, and the image analysis device is used to detect the defect items on each surface of the power battery module 20. An embodiment of the present invention also provides a battery inspection device, including the image acquisition device for the above-mentioned battery appearance defect detection. The battery inspection device further includes an image analysis module. The image information acquired by the image acquisition device is sent to the image analysis module, and the image analysis module analyzes the image information to determine whether there are defect items on each surface of the power battery module 20. In the embodiment of the present invention, the analysis method of the image analysis module is not limited. For example, the analysis method adopts methods such as edge detection, region growing method, and contrast analysis method.

[0059] For the image acquisition device for battery appearance defect detection and the battery inspection device provided by the present invention, when detecting each surface of the battery, the front image information is acquired through the first acquisition structure 11, and the local image information can also be acquired through the second acquisition structure 12. The acquisition position of the local image information can be set according to the structural characteristics of the current surface. According to the technical solution of the present invention, the image information of each surface of the power battery module 20 and the local detail positions of each surface (more than 50 images) are acquired to ensure that the shooting effects of surfaces with different structural shapes and different materials are clear and uniform. The image information can highlight the defect items to be detected, facilitating the analysis and recognition of the images.

[0060] In the description of this specification, the descriptions referring to terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without conflict, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0061] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0062] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An image acquisition device for detecting appearance defects of a battery, characterized in that, It includes an image acquisition device (10), which is located on one side of the power battery module (20) and is used to acquire the image information on that side; The image acquisition device (10) includes a first acquisition structure (11) and a second acquisition structure (12). The image information includes the whole-surface image information and the local image information at multiple set positions. The first acquisition structure (11) is used to acquire the whole-surface image information, and the second acquisition structure (12) is used to acquire the local image information at multiple set positions.

2. The image acquisition device for detecting the appearance defects of the battery according to claim 1, wherein The power battery module (20) is in a cuboid shape and includes a top surface, a bottom surface, two side surfaces, and two end surfaces. Among them, end panels (21) are respectively stacked on the two end surfaces; The first acquisition structure (11) includes a first camera assembly (111), and the second acquisition structure (12) includes a second camera assembly (121); The first camera assembly (111) is connected to a first moving module (112), and the first camera assembly (111) acquires the whole-surface image information of the end panel (21) of the power battery module (20) under the drive of the first moving module (112); the second camera assembly (121) is connected to a second moving module (122), and the second camera assembly (121) acquires the local image information at multiple set positions under the drive of the second moving module (122).

3. The image acquisition device for detecting the appearance defects of the battery according to claim 2, characterized in that, The first acquisition structure (11) further includes a side camera assembly (113), and the second acquisition structure (12) further includes a third camera assembly (123). The side camera assembly (113) and the third camera assembly (123) are connected to a third moving module (124); The side camera assembly (113) is used to acquire the whole-surface image information of the side surface of the power battery module (20), and the third camera assembly (123) is used to acquire the local image information at multiple set positions on the side surface of the end panel (21) of the power battery module (20).

4. The image acquisition device for detecting battery appearance defects according to claim 3, wherein, The first acquisition structure (11) further includes a top surface camera assembly (114), and the second acquisition structure (12) further includes a fourth camera assembly (125). The top surface camera assembly (114) and the fourth camera assembly (125) are connected to a fourth moving module (115); The top surface camera assembly (114) is used to acquire the whole-surface image information of the top surface of the power battery module (20), and the fourth camera assembly (125) is used to acquire the local image information at multiple set positions on the top surface of the end panel (21) of the power battery module (20).

5. The image acquisition device for detecting battery appearance defects according to claim 4, characterized in that, The first acquisition structure (11) further includes a bottom surface camera assembly (116), and the bottom surface camera assembly (116) is connected to a fifth moving module (117); The bottom surface camera assembly (116) is used to acquire the whole-surface image information of the bottom surface of the power battery module (20).

6. The image acquisition device for detecting the appearance defects of the battery according to claim 5, characterized in that, The first camera assembly (111) further includes a bottom surface light supplementing structure (118); The first camera component (111) is further configured to collect the local image information at a plurality of set positions on the bottom surface of the end panel (21) under the drive of the first moving module (112).

7. The image acquisition device for detecting battery appearance defects according to claim 5, characterized in that, The first camera component (111), the second camera component (121), the third camera component (123), and the fourth camera component (125) are area array camera structures; The side camera component (113), the top surface camera component (114), and the bottom surface camera component (116) are line scan camera structures.

8. The image acquisition device for detecting battery appearance defects according to claim 5, characterized in that, The first moving module (112), the second moving module (122), the third moving module (124), the fourth moving module (115), and the fifth moving module (117) are three-dimensional moving modules.

9. The image acquisition device for detecting the appearance defects of the battery according to any one of claims 1 to 8, characterized in that, The whole surface image information and / or the local image information includes image information with multiple different exposure levels.

10. A battery inspection device, characterized in that, An image acquisition device for detecting battery appearance defects, comprising the device according to any one of claims 1 to 9.

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