CN220120138U

CN220120138U - Square battery vision detection line

Info

Publication number: CN220120138U
Application number: CN202320676052.5U
Authority: CN
Inventors: 张立; 王士对; 叶长春; 刘健
Original assignee: Supersonic Artificial Intelligence Technology Co ltd
Current assignee: Supersonic Artificial Intelligence Technology Co ltd
Priority date: 2023-03-30
Filing date: 2023-03-30
Publication date: 2023-12-01
Anticipated expiration: 2033-03-30

Abstract

The utility model discloses a square battery visual detection line which comprises a frame, and a first visual detection device, a second visual detection device and a third visual detection device which are all arranged on the frame; the first visual detection device is used for detecting the appearance quality of the explosion-proof film of the square battery; the second visual detection device is used for detecting whether residual liquid exists on the square battery; the third visual inspection device is used for detecting the appearance quality of the square battery. According to the utility model, the appearance quality of the explosion-proof film of the square battery is detected by arranging the first visual detection device, whether residual liquid exists on the square battery is detected by the second visual detection device, and the appearance quality of the square battery is detected by the third visual detection device; therefore, the square battery is subjected to multiple detection, and the detection is more comprehensive.

Description

Square battery vision detection line

Technical Field

The utility model relates to the field of visual detection, in particular to a square battery visual detection line.

Background

Currently, industrial visual imaging systems are widely used in the field of industrial production. Industrial vision systems can be used for automated inspection, workpiece processing and assembly automation, and control and monitoring of production processes. The image recognition process of the industrial vision imaging system is to extract relevant information from raw image data, describing the image content in a high-general manner, as required by the task, so as to explain and judge certain contents of the image.

At present, the quality detection of the square battery is limited to the single detection of the appearance quality of scratches, grooves and the like on the surface of the square battery, and the detection is not comprehensive enough.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model aims to provide a square battery visual detection line which can detect multiple square batteries more comprehensively.

The utility model adopts the following technical scheme:

a square battery vision detection line comprises a frame, and a first vision detection device, a second vision detection device and a third vision detection device which are all arranged on the frame; wherein:

the first visual detection device is used for detecting the appearance quality of the explosion-proof film of the square battery;

the second visual detection device is used for detecting whether residual liquid exists on the square battery or not;

the third visual detection device is used for detecting appearance quality of the square battery.

Further, the first visual detection device comprises a CCD camera, a coaxial light source and a bowl light source which are sequentially arranged on the rack along an arrangement direction; the coaxial light source can provide shooting light rays for the explosion-proof membrane through the bowl light source; the bowl light source is used for providing shooting light rays for the explosion-proof membrane; the CCD camera is oriented to the coaxial light source and can acquire an appearance image of the to-be-exploded membrane through the coaxial light source and the bowl light source; the coaxial light source and the bowl light source can be arranged in a movable mode in the arrangement direction.

Further, the second visual inspection device comprises a 2D camera and a first light source assembly; the first light source component is used for providing shooting light rays for the square battery; the 2D camera is used for acquiring an appearance image of the square battery.

Further, the square battery is rectangular; the third visual detection device comprises a wide surface detection device, a narrow surface detection device and a flattening device; the wide surface detection device is used for detecting appearance quality of the wide surface of the square battery in the standing state; the leveling device is used for switching the square battery in the standing state to a leveling state with the wide surface of the square battery facing downwards; the narrow face detection device is used for detecting appearance quality of the narrow face of the battery in a flat state.

Further, the flattening device comprises a lifting driving device, a rotary driving device and a clamping device; the clamping device is used for clamping the battery in a clamping shape; the rotary driving device is used for driving the clamping device to rotate around a horizontal axis so that the square battery on the clamping device can be switched between an upright state and a flat state; the lifting driving device is used for driving the clamping device to lift.

Further, the third visual inspection device further comprises a first round-trip conveying device, a wide edge detection device, a first bearing device and a first rotating device; wherein:

the first supporting device is used for supporting the square battery;

the first reciprocating conveying device is used for driving the first supporting device to move so as to enable the square battery on the first supporting device to pass through the wide-face detection device and the wide-face edge detection device in a reciprocating mode;

the first rotating device is used for driving the first bearing device to rotate so as to adjust the square battery to face the wide face of the wide face detection device and the wide face edge detection device;

the wide-face detection device is used for detecting square batteries on the first bearing device;

the wide-face edge detection device is used for detecting appearance quality of edges of wide faces of products.

Further, the wide edge detection device comprises a bracket arranged on the rack and a 3D camera arranged on the bracket; the 3D camera can be arranged on the support in a vertical rotation mode to adjust the detection range of the 3D camera vertically.

Further, the 3D camera is liftably mounted on the stand.

Further, the third visual inspection device further comprises a second round-trip conveying device, a narrow-face edge detection device, a second bearing device and a second rotating device; wherein:

the second supporting device is used for supporting the square battery;

the second reciprocating conveying device is used for driving the second supporting device to move so as to enable the square battery on the second supporting device to pass through the narrow face detection device and the narrow face edge detection device in a reciprocating mode;

the second rotating device is used for driving the second bearing device to rotate so as to adjust the square battery to face the narrow faces of the wide face detection device and the wide face edge detection device;

the narrow-face detection device is used for detecting square batteries on the second bearing device;

the narrow-face edge detection device is used for detecting appearance quality of edges of wide faces of products.

Further, the device also comprises a conveying device, a distance-adjusting reversing device and a transferring device, wherein the conveying direction of the first reciprocating conveying device is parallel to the Z direction; wherein:

the conveying device is used for conveying the double rows of square batteries arranged in the Z direction towards the X direction;

the distance-adjusting reversing device comprises:

two clamping devices; each clamping device is used for clamping a product and is arranged on the frame in a 90-degree rotation mode around a longitudinal axis;

the two reversing driving devices are in one-to-one correspondence with the two clamping devices; the reversing driving device is used for driving the clamping device to rotate;

a distance adjusting device; at least one clamping device is movably arranged, and can enable the two clamping devices to be close to or far away from each other when moving; the distance adjusting device is used for driving the movable clamping device to move;

the transfer device is used for synchronously transferring two square batteries which are arranged side by side on the conveying device to the two clamping devices and then transferring the square batteries to the first reciprocating conveying device.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, the appearance quality of the explosion-proof film of the square battery is detected by arranging the first visual detection device, whether residual liquid exists on the square battery is detected by the second visual detection device, and the appearance quality of the square battery is detected by the third visual detection device; therefore, the square battery is subjected to multiple detection, and the detection is more comprehensive.

Drawings

FIG. 1 is a front view of a visual inspection line for a prismatic battery of the present utility model;

FIG. 2 is a top view of a visual inspection line for a prismatic battery of the present utility model;

FIG. 3 is a left side view of the portion E of FIG. 2 in accordance with the present utility model;

FIG. 4 is a schematic structural view of a first visual inspection apparatus according to the present utility model;

FIG. 5 is a right side view of the section F of FIG. 2 in accordance with the present utility model;

FIG. 6 is a schematic diagram of the broad face detection device and the broad face edge detection device according to the present utility model;

FIG. 7 is a schematic view of the structure of the flattening device, the first supporting device, the first rotating device, the second back and forth conveying device, the second supporting device and the second rotating device of the present utility model;

FIG. 8 is a schematic view of the structure of the flattening device of the present utility model;

fig. 9 is a schematic structural view of a prismatic battery.

In the figure: 10. a frame; 20. a first visual inspection device; 21. a CCD camera; 22. a coaxial light source; 23. a bowl light source; 30. a second visual inspection device; 31. a 2D camera; 32. a first light source assembly; 40. square battery; 41. a narrow face; 42. broad surface; 43. an edge; 44. an explosion-proof membrane; 50. a broad face detection device; 60. a narrow face detection device; 70. a leveling device; 71. a lifting driving device; 72. a rotation driving device; 73. a clamping device; 80. a first shuttle conveyor; 90. a wide edge detection device; 91. a bracket; 92. a 3D camera; 100. a first support device; 110. a first rotating device; 120. a second shuttle conveyor; 130. narrow-face edge detection device; 140. a second support device; 150. a second rotating device; 160. a transport device; 170. a distance-adjusting reversing device; 171. a clamping device; 172. a reversing driving device; 173. a distance adjusting device; 180. a transfer device; 181. and a transfer manipulator.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1 to 9, the present utility model discloses a visual inspection line of a square battery 40, which comprises a frame 10, and a first visual inspection device 20, a second visual inspection device 30 and a third visual inspection device all mounted on the frame 10; the first visual inspection device 20 is used for inspecting the appearance quality of the explosion-proof film 44 of the square battery 40, and at this time, whether the surface of the explosion-proof film 44 has scratches, notches and other appearance quality can be inspected; if scratches, gaps and the like exist, unqualified series can be listed, and specific judging standards of qualification and unqualification can be set according to actual needs; the second visual inspection device 30 is used for detecting whether the square battery 40 has residual liquid, wherein the residual liquid is at least one of electrolyte, DMC, cleaning agent and the like; it should be noted that if the liquid remains on the surface of the square battery 40, the liquid can be classified into a series of unqualified products, and if the liquid remains, the liquid is a qualified product; the third visual detection device is used for detecting the appearance quality of the square battery 40, and at this time, whether the surface of the square battery 40 has scratches, notches and other appearance quality can be detected; by the above, the square battery 40 is subjected to multiple detection, and the detection is more comprehensive.

It should be noted that, since the area of the explosion-proof film 44 of the square battery 40 is relatively small, the defect on the explosion-proof film 44 of the square battery 40 is not easily found when the whole surface of the square battery 40 is adopted for photographing and judging, and thus, the present embodiment can realize more comprehensive detection by setting the first visual detection device 20 and the second visual detection device 30.

Since the area of the explosion-proof film 44 is relatively small, it is preferable that the first visual inspection device 20 of the present embodiment includes the CCD camera 21, the coaxial light source 22, and the bowl light source 23 sequentially disposed on the frame 10 in an arrangement direction; the coaxial light source 22 can provide photographing light to the explosion-proof film 44 through the bowl light source 23; the bowl light source 23 is used for providing shooting light to the explosion-proof membrane 44; the camera of the CCD camera 21 faces the coaxial light source 22 and can acquire an appearance image of the membrane 44 to be explosion-proof through the coaxial light source 22 and the bowl light source 23; the coaxial light source 22 and the bowl light source 23 are both movably arranged in the arrangement direction; in this way, the CCD camera 21, the coaxial light source 22 and the bowl light source 23 are aligned to the square product, the coaxial light source 22 and the bowl light source 23 provide shooting light to the product to be detected, at this time, the bowl light source 23 is a diffuse reflection light source, illumination is relatively uniform, the coaxial light source 22 is uniformly illuminated and can supplement light for the position of the middle part of the bowl light source 23 corresponding to the position of the coaxial light source 22, which does not emit light, so as to avoid darker light from the middle part, and further realize comprehensive and uniform illumination, and meanwhile, the positions of the coaxial light source 22 and the bowl light source 23 are adjusted through actual conditions so as to adjust to the optimal lighting effect, thereby providing the optimal lighting effect for the object to be detected, providing enough light sources for the explosion-proof film 44 of the square battery 40, improving the shooting quality of the subsequent CCD camera 21 and improving the detection accuracy; at the same time, the light is more concentrated on the explosion-proof film 44 of the square battery 40 by the bowl shape of the bowl light source 23, ensuring the shining.

The coaxial light source 22 has a light outlet, and the bowl light source 23 has a light outlet penetrating up and down; the camera of the CCD camera 21 is coaxially arranged with the light outlet of the coaxial light source 22 and the light outlet of the bowl light source 23, and the camera of the CCD camera 21 faces the light outlet of the coaxial light source 22, at this time, the camera of the CCD camera 21 shoots an object to be detected through the light outlet of the coaxial light source 22 and the light outlet of the bowl light source 23; the coaxial light source 22 emits light through a light emitting opening thereof, and the coaxial light source 22 is a supplementary light source at the light emitting opening of the bowl light source 23; the CCD camera 21 shoots through the light outlet of the bowl light source 23.

Specifically, a fixing device is provided to fix the coaxial light source 22 and the bowl light source 23.

The second visual inspection apparatus 30 of the present embodiment includes a 2D camera 31 and a first light source assembly 32; the first light source assembly 32 is used for providing shooting light to the square battery 40; the 2D camera 31 is for acquiring an external image of the square battery 40; at this time, if the liquid remains on the surface of the square battery 40, the 2D camera 31 can capture the liquid; the detection principle of the second visual detection device 30 is known in the prior art, and will not be described herein.

The square battery 40 of the present embodiment has a rectangular parallelepiped shape; the third visual inspection device comprises a wide-face inspection device 50, a narrow-face inspection device 60 and a leveling device 70; the wide surface detection device 50 is used for detecting appearance quality of the wide surface 42 of the square battery 40 in a standing state; the leveling device 70 is used for switching the square battery 40 in the standing state to a leveling state in which the wide surface 42 of the square battery 40 faces downward; in this way, after the standing state shown in the wire frame a of fig. 7 is switched to the flat device 70 shown in the wire frame B of fig. 7 by the flat device 70, the bottom surface of the square battery 40 is exposed to the side direction at this time, and thereby the four narrow sides 41 of the square are exposed; the narrow surface detection device 60 is used for detecting the appearance quality of the battery narrow surface 41 in a flat state; as described above, appearance quality detection of six faces of the square battery 40 is achieved.

Specifically, a transfer device may also be provided that transfers the square battery 40 between the wide-face detection means 50 and the narrow-face detection means 60.

The leveling device 70 of the present embodiment includes a lifting drive device 71, a rotation drive device 72, and a gripping device 73; the gripping means 73 is used for gripping the shaped battery 40; the rotation driving device 72 is used for driving the clamping device 73 to rotate around a horizontal axis so that the square battery 40 on the clamping device 73 can be switched between an up state and a flat state; the lifting driving device 71 is used for driving the clamping device 73 to lift; in this way, the lifting driving device 71 can lower the clamping device 73 to clamp the raised product, and after the rotating driving device 72 drives the clamping device 73 to rotate, the product can be put flat, and at the moment, the lifting operation and the rotating operation are separated, so that the operation is convenient.

The rotation driving device 72 may be a rotary motor, and the elevation driving device 71 may be an elevation cylinder.

The clamping device 171 may be a clamping robot.

The wide-area detection device 50 may be a visual detection device that can be purchased directly in the market, and specifically includes a camera and a light source unit, and the detection principle thereof may be known from the prior art, and will not be described herein.

Illustratively, the third vision inspection device further includes a first shuttle 80, a broad edge detection device 90, a first holding device 100, and a first rotating device 110; the first supporting device 100 is used for supporting the square battery 40; the first reciprocating conveyor 80 is used for driving the first supporting device 100 to move so as to enable the square battery 40 on the first supporting device 100 to reciprocate through the wide-face detection device 50 and the wide-face edge detection device 90; the first rotating device 110 is used for driving the first supporting device 100 to rotate so as to adjust the square battery 40 towards the wide face 42 of the wide face detecting device 50 and the wide face edge detecting device 90; the wide surface detection device 50 is used for detecting the square battery 40 on the first supporting device 100; the wide edge detection device 90 is used for detecting the appearance quality of the edge 43 of the wide surface 42 of the product.

In the above structure, the square battery 40 is driven by the first round-trip conveyor 80 to move in the direction indicated by the arrow K in fig. 2, and then passes through the broad face detector 50 and the broad face edge detector 90, and at this time, the broad face detector 50 and the broad face edge detector 90 can perform appearance detection of the face and the edge 43; then the first rotating device 110 is adopted to drive the first supporting device 100 to rotate so as to switch the other wide surface 42 of the square battery 40 to face the wide surface detection device 50 and the wide surface edge detection device 90, and when the square product returns under the drive of the first round-trip conveying device 80, the appearance detection of the surface and the edge 43 of the other wide surface 42 of the square product can be realized; thereby, the number of the broad face detecting devices 50 and the broad face edge detecting devices 90 is reduced, and the cost is saved.

The first round-trip conveyor 80 may be a conveyor belt for handling dirt; the first rotating device 110 may be a rotating electric machine.

Specifically, the broad edge detection device 90 includes a bracket 91 provided on the chassis 10 and a 3D camera 92 provided on the bracket 91; the 3D camera 92 is rotatably provided up and down on the stand 91 to adjust up and down the detection range of the 3D camera 92; at this time, the detection range of the 3D camera 92 can be adjusted according to the height of the edge 43 of the square battery 40, so that the practicability is higher; meanwhile, the 3D camera 92 integrates a light source itself, and a light supply assembly for providing a light source may not be additionally provided.

More specifically, the number of the 3D cameras 92 is three, and the three 3D cameras 92 are sequentially distributed from top to bottom, so that the three 3D cameras 92 can detect the upper edge 43, the side edge 43 and the lower edge 43 of the wide face 42 of the square battery 40 respectively, and the comprehensive detection of the wide face 42 and the edge 43 of the square battery 40 is realized.

The 3D camera 92 of the present embodiment is installed on the stand 91 in a liftable manner, so as to expand the adjustment range of the 3D camera 92 and improve the practicability.

The third vision inspection device of this embodiment further includes a second round-trip conveyor 120, a narrow-face edge inspection device 130, a second support device 140, and a second rotating device 150; the second supporting device 140 is used for supporting the square battery 40; the second back and forth conveying device 120 is used for driving the second supporting device 140 to move so as to enable the square battery 40 on the second supporting device 140 to reciprocate through the narrow face detection device 60 and the narrow face edge detection device 130; the second rotating device 150 is used for driving the second supporting device 140 to rotate so as to adjust the square battery 40 towards the narrow face 41 of the wide face detection device 50 and the wide face edge detection device 90; the narrow surface detection device 60 is used for detecting the square battery 40 on the second supporting device 140; the narrow-face edge detection device 130 is used for detecting the appearance quality of the edge 43 of the wide face 42 of the product.

In the above structure, the square battery 40 is driven by the second round-trip conveyor 120 to move along the direction indicated by the arrow K in fig. 2, and then passes through the narrow face detecting device 60 and the narrow face edge detecting device 130, and at this time, the narrow face detecting device 60 and the narrow face edge detecting device 130 can perform appearance detection of the face and the edge 43; then the second rotating device 150 is adopted to drive the second supporting device 140 to rotate so as to switch the other narrow surface 41 of the square battery 40 to face the narrow surface detecting device 60 and the narrow surface edge detecting device 130, and when the square product returns under the drive of the second round-trip conveying device 120, the appearance detection of the surface and the edge 43 of the other narrow surface 41 of the square product can be realized; thereby, the number of narrow face detection devices 60 and narrow face edge detection devices 130 is reduced, and cost is saved.

Specifically, the narrow face detecting device 60 and the narrow face edge detecting device 130 are a set of detecting units, and the two sets of detecting units are provided in this embodiment, and the two sets of detecting units are disposed opposite to each other, so that after the second supporting device 140 drives the square battery 40 to pass through the two sets of detecting units, detection of two opposite narrow faces 41 of the square battery 40 is achieved, and detection of two other narrow faces 41 of the square battery 40 is achieved after one rotation, so that detection of all narrow faces 41 of the square battery 40 can be completed only by one rotation and reciprocation.

The narrow-side edge detection device 130 may have the same structure as the wide-side edge detection device 90.

The first and second holders 100 and 140 may be further configured to hold the prismatic cells 40 to prevent them from falling off during rotation.

At present, in order to save space, the multiple conveying channels of the production line are in an L-shaped connection, so in this embodiment, the device further comprises a conveying device 160, a distance-adjusting reversing device 170 and a transferring device 180, and the conveying direction of the first round-trip conveying device 80 is parallel to the Z direction; wherein: the conveying device 160 is used for conveying the double rows of square batteries 40 arranged in the Z direction towards the X direction, at this time, the first visual inspection device 20 and the second visual inspection device 30 can correspond to the conveying device 160 and inspect the square batteries 40 on the conveying device 160, specifically, the movement of the square batteries 40 can be prevented by matching with the stop structure, so that the first visual inspection device 20 and the second visual inspection device 30 can inspect the square batteries; the conveying direction of the first shuttle 80 is parallel to the Z direction; thereby saving space; the pitch reversing device 170 includes:

two clamping devices 171; each gripping device 171 is for gripping a product and is arranged on the frame 10 so as to be rotatable by 90 ° about a longitudinal axis;

two reversing driving devices 172 corresponding to the two clamping devices 171 one by one; the reversing driving device 172 is used for driving the corresponding clamping device 171 to rotate;

a distance adjusting device 173; at least one clamping device 171 is movably arranged and can enable the two clamping devices 171 to approach or separate from each other when moving; the distance adjusting device 173 is used for driving the movable clamping device 171 to move;

the transfer device 180 is used for synchronously transferring two square batteries 40 arranged side by side on the conveying device 160 to the two clamping devices 171 and then to the first back and forth conveying device 80.

In the above-described configuration, when the prismatic battery 40 is transported by the transporting device 160 with its narrow surface 41 facing the transporting direction, the distance between the two holding devices 171 is adjusted by the distance adjusting device 173 to the same position as the distance between the two prismatic batteries 40 arranged side by side on the transporting device 160, the two prismatic batteries 40 arranged side by side on the transporting device 160 are correspondingly transferred to the two holding devices 171 simultaneously by the transferring device 180, and the direction of the prismatic battery 40 can be changed by 90 ° by rotating the holding devices 171 by the reversing driving device 172, for example, the narrow surface 41 of the prismatic battery 40 is adjusted from the state shown by the line frame D in fig. 5 to the state shown by the line frame D in fig. 5, and then the wide surface 42 of the prismatic battery 40 faces the side where the wide surface detecting device 50 is located, and then the distance adjusting device 173 is used to drive the holding devices 171 to approach to reduce the distance between the two prismatic batteries 40, so as to save the transporting space; after the completion of the reversing, the gripping device 171 may be transferred to the first shuttle 80 by the transfer device 180, and the wide surface detecting device 50 located on the first shuttle 80 may detect the wide surface 42 of the prismatic battery 40.

The clamping device 171 may be a clamping jaw structure; the reversing driving device 172 may be a rotary motor; the distance adjusting device 173 can be a linear cylinder.

The transfer device 180 includes two transfer robots 181, one of which transfer robot 181 transfers the prismatic battery 40 between the conveyor 160 and the gripper 171, and the other transfer robot 181 transfers the prismatic battery 40 between the gripper 171 and the first shuttle 80.

The above embodiments are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present utility model are intended to be within the scope of the present utility model as claimed.

Claims

1. The square battery vision detection line is characterized by comprising a frame (10), and a first vision detection device (20), a second vision detection device (30) and a third vision detection device which are all arranged on the frame (10); wherein:

the first visual detection device (20) is used for detecting the appearance quality of an explosion-proof film (44) of the square battery (40);

the second visual detection device (30) is used for detecting whether residual liquid exists on the square battery (40);

the third visual detection device is used for detecting the appearance quality of the square battery (40).

2. The visual inspection line for square batteries according to claim 1, characterized in that the first visual inspection device (20) comprises a CCD camera (21), a coaxial light source (22) and a bowl light source (23) sequentially arranged on the frame (10) along an arrangement direction; the coaxial light source (22) can provide shooting light to the explosion-proof film (44) through the bowl light source (23); the bowl light source (23) is used for providing shooting light to the explosion-proof film (44); the camera of the CCD camera (21) faces the coaxial light source (22) and can acquire an appearance image of the to-be-exploded membrane (44) through the coaxial light source (22) and the bowl light source (23); the coaxial light source (22) and the bowl light source (23) are arranged movably in the arrangement direction.

3. The square battery vision inspection line of claim 1, wherein the second vision inspection device (30) includes a 2D camera and a first light source assembly (32); the first light source component (32) is used for providing shooting light to the square battery (40); the 2D camera is used for acquiring an appearance image of the square battery (40).

4. The prismatic battery vision inspection line according to claim 1, characterized in that the prismatic battery (40) has a cuboid shape; the third visual detection device comprises a wide surface detection device (50), a narrow surface detection device (60) and a flattening device (70); the wide surface detection device (50) is used for detecting the appearance quality of the wide surface (42) of the square battery (40) in the standing state; the leveling device (70) is used for switching the square battery (40) in the standing state to a leveling state that the wide surface (42) of the square battery (40) faces downwards; the narrow surface detection device (60) is used for detecting the appearance quality of the narrow surface of the battery in a flat state.

5. The visual inspection line for square cells according to claim 4, wherein the leveling device (70) comprises a lifting driving device (71), a rotation driving device (72) and a gripping device (73); the clamping device (73) is used for clamping the battery (40) in a clamping shape; the rotary driving device (72) is used for driving the clamping device (73) to rotate around a horizontal axis so that the square battery (40) on the clamping device (73) can be switched between an upright state and a flat state; the lifting driving device (71) is used for driving the clamping device (73) to lift.

6. The visual inspection line for square cells of claim 4, wherein the third visual inspection device further comprises a first shuttle device (80), a broad edge detection device (90), a first support device (100), and a first rotation device (110); wherein:

the first supporting device (100) is used for supporting the square battery (40);

the first reciprocating conveying device (80) is used for driving the first supporting device (100) to move so as to enable the square battery (40) on the first supporting device (100) to reciprocate through the wide-face detection device (50) and the wide-face edge detection device (90);

the first rotating device (110) is used for driving the first supporting device (100) to rotate so as to adjust the square battery (40) to face the wide surface of the wide surface detection device (50) and the wide surface edge detection device (90);

the wide-surface detection device (50) is used for detecting the square battery (40) on the first bearing device (100);

the wide edge detection device (90) is used for detecting appearance quality of edges of wide surfaces of products.

7. The square battery vision inspection line according to claim 6, characterized in that the broad side edge detection device (90) comprises a bracket (91) provided on the frame (10) and a 3D camera provided on the bracket (91); the 3D camera is arranged on the bracket (91) in a vertically rotatable manner so as to adjust the detection range of the 3D camera vertically.

8. The battery cell vision inspection line of claim 7, wherein the 3D camera is liftably mounted on the stand (91).

9. The visual inspection line of square cells of claim 6, wherein the third visual inspection device further comprises a second shuttle (120), a narrow face edge detection device (130), a second support device (140), and a second rotation device (150); wherein:

the second supporting device (140) is used for supporting the square battery (40);

the second reciprocating conveying device (120) is used for driving the second supporting device (140) to move so as to enable the square battery (40) on the second supporting device (140) to reciprocate through the narrow face detection device (60) and the narrow face edge detection device (130);

the second rotating device (150) is used for driving the second supporting device (140) to rotate so as to adjust the square battery (40) to face the narrow faces of the wide face detection device (50) and the wide face edge detection device (90);

the narrow-face detection device (60) is used for detecting the square battery (40) on the second bearing device (140);

the narrow-face edge detection device (130) is used for detecting appearance quality of edges of wide faces of products.

10. The visual inspection line of square cells of claim 6, further comprising a conveyor (160), a pitch reversing device (170) and a transfer device (180), the direction of conveyance of the first shuttle conveyor (80) being parallel to the Z-direction; wherein:

the conveying device (160) is used for conveying the double rows of square batteries (40) arranged in the Z direction towards the X direction;

the distance-adjusting reversing device (170) comprises:

two clamping devices (171); each clamping device (171) is used for clamping a product and is arranged on the frame (10) in a manner of rotating 90 degrees around a longitudinal axis;

two reversing driving devices (172) which are in one-to-one correspondence with the two clamping devices (171); the reversing driving device (172) is used for driving the clamping device (171) to rotate;

a distance adjusting device (173); at least one clamping device (171) is movably arranged and can enable two clamping devices (171) to be close to or far away from each other when moving; the distance adjusting device (173) is used for driving the movable clamping device (171) to move;

the transfer device (180) is used for synchronously transferring two square batteries (40) which are arranged side by side on the conveying device (160) to the two clamping devices (171) and then to the first round-trip conveying device (80).