Vision-based battery cell size detection device

Abstract

The utility model relates to a vision-based cell size detection device, which comprises a vision detection assembly, a first reference block and a second reference block, the first reference block and the second reference block are oppositely arranged, two first reference surfaces perpendicular to each other and two second reference surfaces perpendicular to each other are respectively formed on the opposite sides of the first reference block and the second reference block, the two reference surfaces II intersect and are parallel and opposite to the two reference surfaces I respectively; the visual detection assembly photographs a preset range including the two first reference surfaces. According to the utility model, only one visual assembly is needed, the whole battery cell does not need to be photographed, only one adjacent long edge and one wide edge of the battery cell to be detected need to be respectively attached to the two reference surfaces II, the right angle of the battery cell is aligned with the intersection of the two reference surfaces II, and an image in a preset range is obtained through the visual detection assembly; the image comprises the two reference surfaces I and the other long side and the wide side of the battery cell, so that the size of the battery cell can be detected, and the length and the width of any battery cell can be detected.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cell measurement, in particular to a battery cell size detection device based on vision. Background Art

[0002] With the rapid development of the new energy industry, the requirements for the basic unit of new energy batteries - battery cells - have become increasingly stringent, and the field of battery cell size measurement has attracted more and more attention.

[0003] The traditional way to measure battery cells is still to manually measure with a vernier caliper, which is not only inefficient but also inaccurate. At present, the industry has adopted visual detection methods. For example, the patent with publication number CN216745938U discloses an online detection system for battery shape and process dimensions. The battery steel shell delivered to the battery steel shell conveyor turntable is photographed by a visual detection device, so that the outer shell size of the battery steel shell can be measured according to the images taken by the two sets of visual detection devices, and the appearance of the battery steel shell can be detected to see whether it is qualified. The visual detection method is accurate and efficient, but when the size of the battery cell is too large, one visual component cannot cover the entire battery cell. At least two visual components or a servo-driven visual component are required for scanning to complete the measurement of the battery cell, which increases the complexity and cost of the measurement structure. Utility Model Content

[0004] Based on this, it is necessary to address the technical problem that the current vision-based battery cell size detection device requires at least two vision components or a servo-driven vision component to scan the battery cell when the battery cell size is too large to complete the battery cell measurement, which increases the complexity and cost of the measurement structure. The utility model provides a vision-based battery cell size detection device.

[0005] The utility model proposes a battery cell size detection device based on vision, which includes a visual detection component, and also includes a reference block 1 and a reference block 2 which are relatively arranged. Two mutually perpendicular reference planes 1 and two mutually perpendicular reference planes 2 are respectively formed on opposite sides of the reference block 1 and the reference block 2. The two reference planes 2 intersect and the two reference planes 2 are respectively parallel to and opposite to the two reference planes 1. The visual detection component takes pictures within a predetermined range including the two reference planes 1.

[0006] Through the above structural design, the utility model, when detecting a square shell battery cell, firstly fits a long side and a wide side of the square shell battery cell with two reference planes 2 respectively and aligns the right angle formed by the intersection of the long side and the wide side of the square shell battery cell with the intersection of the two reference planes 2, at this time, the right angle formed by the intersection of the other long side and the wide side of the square shell battery cell faces the reference block 1, and then takes a photo of a predetermined range including the two reference planes 1 through a visual detection component, the predetermined range includes the right angle formed by the intersection of the other long side and the wide side of the square shell battery cell, the visual detection component can detect the distance between the other long side of the square shell battery cell and the reference plane 1 parallel thereto and the distance between the other wide side of the square shell battery cell and the reference plane 1 parallel thereto according to the photographed photos, since the distance between the relatively parallel reference planes 1 and 2 is known, the length and width of the square shell battery cell can be calculated, only one visual component is needed and there is no need to take a photo of the entire battery cell, so the length and width of any battery cell can be detected, thereby simplifying the structure and saving costs.

[0007] As a further improvement of the above scheme of the utility model, it also includes a base, and both the reference block one and the reference block two are installed on the base, wherein the reference block two includes a long side fixing block and a wide side fixing block, and the long side fixing block and the wide side fixing block are perpendicular to each other to form an L-shaped reference block two, and the side surface where the long side fixing block and the wide side fixing block are close to each other is the two reference surfaces two of the reference block two.

[0008] As a further improvement of the above scheme of the utility model, it also includes a long side pushing block and a cylinder 1; the long side pushing block is located between the reference block 1 and the wide side fixing block, the long side pushing block and the long side fixing block are arranged opposite to each other and a side thereof facing the long side fixing block is parallel to the long side fixing block; the telescopic end of the cylinder 1 is connected with a connecting plate 1, the connecting plate 1 is connected to the side of the long side pushing block away from the long side fixing block, and the cylinder 1 is telescopic to drive the long side pushing block away from or close to the long side fixing block.

[0009] As a further improvement of the above scheme of the utility model, it also includes a wide-side push block and a second cylinder; the wide-side push block is located between the first reference block and the long-side fixed block, the wide-side push block and the wide-side fixed block are arranged opposite to each other and a side thereof facing the wide-side fixed block is parallel to the wide-side fixed block; the telescopic end of the second cylinder is connected with a second connecting plate, the second connecting plate is connected to the side of the wide-side push block away from the wide-side fixed block, and the second cylinder is telescopic to drive the wide-side push block away from or close to the wide-side fixed block.

[0010] As a further improvement of the above solution of the utility model, it also includes a bottom plate, and the four corners of the bottom of the base are connected to the bottom plate through columns, and the cylinder 1 and the cylinder 2 are installed at the bottom of the base.

[0011] As a further improvement of the above solution of the utility model, it also includes an adjusting member, which is connected to the visual detection component and is used to adjust the position of the visual detection component above the reference block.

[0012] As a further improvement of the above scheme of the utility model, the adjusting member includes an adjusting rod one, an adjusting rod two and an adjusting rod three. The adjusting rod one is arranged vertically and has a base connected to its bottom. The adjusting rod two is arranged horizontally and perpendicular to the adjusting rod one. One end of the adjusting rod two is movably connected to the top end of the adjusting rod one. The adjusting rod three is arranged horizontally and perpendicular to the adjusting rod two. One end of the adjusting rod three is movably connected to the other end of the adjusting rod two. The visual detection component is movably installed at the other end of the adjusting rod three.

[0013] As a further improvement of the above scheme of the utility model, the top end of the adjusting rod one is slidably connected with a clamping block one which can rotate relative to the adjusting rod one, and one end of the adjusting rod two passes through the clamping block one and is slidably connected to the clamping block one.

[0014] As a further improvement of the above scheme of the utility model, one end of the adjusting rod 2 away from the adjusting rod 1 is slidably connected to the clamping block 2 which can rotate relative to the adjusting rod 2, and one end of the adjusting rod 3 passes through the clamping block 2 and is slidably connected to the clamping block 2.

[0015] As a further improvement of the above solution of the utility model, one end of the adjusting rod three away from the adjusting rod two is slidably connected to a mounting block that can rotate relative to the adjusting rod three, and the visual detection component is installed on the mounting block.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model only needs one visual component and does not need to take a picture of the entire battery cell. It only needs to place an adjacent long side and a wide side of the battery cell to be tested against two reference planes 2 respectively, and align the right angle of the battery cell with the intersection of the two reference planes 2. The image within a predetermined range is obtained through the visual detection component. The image includes the two reference planes 1 and the other long side and wide side of the battery cell, so as to complete the detection of the battery cell size. The length and width of any battery cell can be detected, which simplifies the structure and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a battery cell size detection device based on vision proposed in an embodiment of the utility model;

[0019] Figure 2 A partial structural schematic diagram of a battery cell size detection device based on vision proposed in an embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of the installation structure of cylinder 1 and cylinder 2 in a vision-based battery cell size detection device proposed in an embodiment of the utility model;

[0021] Figure 4A schematic diagram of the structure of an adjusting member in a battery cell size detection device based on vision proposed in an embodiment of the utility model;

[0022] Figure 5 This is a detection principle diagram of a battery cell size detection device based on vision proposed in an embodiment of the utility model.

[0023] Figure numerals: 1, visual inspection component; 2, reference block one; 3, reference block two; 301, long side fixing block; 302, wide side fixing block; 4, base; 5, long side push block; 6, cylinder one; 7, wide side push block; 8, cylinder two; 9, bottom plate; 10, column; 11, adjusting rod one; 12, adjusting rod two; 13, adjusting rod three; 14, clamping block one; 15, clamping block two; 16, mounting block; 17, connecting plate one; 18, connecting plate two; 19, base. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0027] In view of the technical problem that the current vision-based battery cell size detection device requires at least two vision components or a servo-driven vision component to scan the battery cell when the battery cell size is too large, which increases the complexity and cost of the measurement structure, this embodiment proposes a vision-based battery cell size detection device. The vision-based battery cell size detection device of this embodiment only needs to take pictures within a predetermined range to detect the size of the square shell battery cell.

[0028] Reference Figure 1-Figure 4 The vision-based battery cell size detection device of this embodiment includes a visual detection component 1, a reference block 1 2 and a reference block 2 3, and may also include a base 4, a long side push block 5, a cylinder 1 6, a wide side push block 7, a cylinder 2 8, a bottom plate 9 and an adjustment member.

[0029] The base 4 is arranged horizontally, and columns 10 are fixed at the four corners of the bottom of the base 4. The bottom plate 9 is fixed to the ground and located below the base 4, and the bottoms of the four columns 10 are fixed to the bottom plate 9.

[0030] The reference block 2 is fixed on the base 4. In this embodiment, the reference block 2 is L-shaped, and two mutually perpendicular outer side surfaces of the L-shape of the reference block 2 are defined as reference plane 1.

[0031] The reference block 2 3 is fixed on the base 4. In this embodiment, the reference block 2 3 includes a long side fixing block 301 and a wide side fixing block 302. The long side fixing block 301 and the wide side fixing block 302 are perpendicular to each other to form an L-shaped reference block 2 3. The inner side surfaces of the long side fixing block 301 and the wide side fixing block 302 are respectively parallel to the two reference planes 1, and the inner side surfaces of the long side fixing block 301 and the wide side fixing block 302 are both defined as reference planes 2. The distance between the relatively parallel reference planes 1 and 2 is known. The distance between the reference plane 2 of the long side fixing block 301 and the corresponding reference plane 1 is defined as L1, and the distance between the reference plane 2 of the wide side fixing block 302 and the corresponding reference plane 1 is defined as L2.

[0032] The long side push block 5 is located between the reference block 2 and the wide side fixed block 302. The long side push block 5 is arranged opposite to the long side fixed block 301 and the side thereof facing the long side fixed block 301 is parallel to the long side fixed block 301. The cylinder 6 is fixed to the bottom of the base 4. The telescopic end of the cylinder 6 is connected to a connecting plate 17. The connecting plate 17 is connected to the side of the long side push block 5 away from the long side fixed block 301. The cylinder 6 is telescopic to drive the long side push block 5 away from or close to the long side fixed block 301.

[0033] The wide side push block 7 is located between the reference block 1 2 and the long side fixed block 301. The wide side push block 7 is arranged opposite to the wide side fixed block 302 and the side thereof facing the wide side fixed block 302 is parallel to the wide side fixed block 302. The cylinder 2 8 is fixed to the bottom of the base 4. The telescopic end of the cylinder 2 8 is connected with the connecting plate 2 18. The connecting plate 2 18 is connected to the side of the wide side push block 7 away from the wide side fixed block 302. The cylinder 2 8 is telescopic to drive the wide side push block 7 away from or close to the wide side fixed block 302.

[0034] The adjusting member includes an adjusting rod 11, an adjusting rod 2 12 and an adjusting rod 3 13. The adjusting rod 11 is arranged vertically and its bottom is connected to a base 19, which is fixed to the ground. The top of the adjusting rod 11 is fastened with a clamping block 14 by bolts. When the bolts between the clamping block 14 and the adjusting rod 11 are loosened, the clamping block 14 can slide up and down along the adjusting rod 11 and rotate around the adjusting rod 11. The adjusting rod 2 12 is arranged horizontally. One end of the adjusting rod 2 12 passes through the clamping block 14 and is connected to the clamping block 14. The other end of the adjusting rod 2 12 is fastened with a clamping block 2 15 by bolts. When the bolts between the clamping block 2 15 and the adjusting rod 2 12 are loosened, the clamping block 2 15 can slide horizontally along the adjusting rod 2 12 and rotate around the adjusting rod 2 12. The adjusting rod three 13 is arranged horizontally and perpendicular to the adjusting rod two 12. One end of the adjusting rod three 13 passes through the clamping block two 15 and is connected to the clamping block two 15. The end of the adjusting rod three 13 away from the adjusting rod two 12 is fastened with a mounting block 16 by bolts. When the bolts between the mounting block 16 and the adjusting rod three 13 are loosened, the mounting block 16 can slide horizontally along the adjusting rod three 13 and rotate around the adjusting rod three 13.

[0035] The visual inspection component 1 is installed on the mounting block 16. The visual inspection component 1 can be adjusted at three angles and in three directions by adjusting the first rod 11, the second rod 12 and the third rod 13. The specific adjustment method is as follows: the clamping block 14 and the adjusting rod 11 are fastened by bolts. Loosen the bolts between the clamping block 14 and the adjusting rod 11, and the clamping block 14 can slide up and down along the adjusting rod 11 and rotate around the adjusting rod 11; loosen the bolts between the clamping block 2 15 and the adjusting rod 2 12, and the clamping block 2 15 can slide along the adjusting rod 2 12 and rotate around the adjusting rod 2 12; loosen the bolts between the mounting block 16 and the adjusting rod 3 13, and the mounting block 16 can slide along the adjusting rod 3 13 and rotate around the adjusting rod 3 13; thereby completing the adjustment of the visual inspection component 1 at three angles and in three directions. In this embodiment, the visual inspection component 1 adopts a visual inspection device of the prior art, which can detect the size of a specified object or the distance between specified objects based on the photographed photos. The existing visual inspection device mainly includes a camera 101 and a light source 102 . The camera 101 is mounted on a mounting block 16 , and the light source 102 is mounted on the mounting block 16 via a bracket 103 .

[0036] Next, combine Figure 5 , the detection principle of this embodiment is described:

[0037] First, the square shell battery cell a to be tested is placed on the base 4 and located between the reference block 1 2, the reference block 2 3, the long side push block 5, and the wide side push block 7. Then, the cylinder 1 6 and the cylinder 2 8 are contracted to respectively drive the long side push block 5 and the wide side push block 7 to move close to the square shell battery cell a, so that one long side of the square shell battery cell a is in contact with the reference surface 2 of the long side fixing block 301, and one wide side is in contact with the reference surface 2 of the wide side fixing block 302. At the same time, the intersection between the long side and the wide side is in contact with the reference block 2 3. The inner side is aligned at a right angle; then the position of the visual inspection component 1 is adjusted by the adjustment piece, so that the visual inspection component 1 can capture the right angle formed by the intersection of the two reference planes 1 of the reference block 2 and the other long sides and wide sides of the square shell battery cell a; the visual inspection component 1 can detect the distances between the other long sides and wide sides of the square shell battery cell and the corresponding parallel reference planes 1 according to the captured photos, which are defined as L3 and L4 respectively, and the length of the battery cell = L2-L4, and the width = L1-L3.

[0038] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A battery cell size detection device based on vision, comprising a visual detection component (1), characterized in that: The device further comprises a reference block 1 (2) and a reference block 2 (3) which are arranged opposite to each other. The reference block 1 (2) and the reference block 2 (3) respectively form two vertical reference planes 1 and two vertical reference planes 2. The two reference planes 2 intersect and are parallel to and opposite to the two reference planes 1. The visual detection component (1) takes photos within a predetermined range including the two reference planes 1.

2. The visual-based battery cell size detection device according to claim 1, characterized in that: The invention also comprises a base (4), and the reference block 1 (2) and the reference block 2 (3) are both mounted on the base (4), wherein the reference block 2 (3) comprises a long side fixing block (301) and a wide side fixing block (302), the long side fixing block (301) and the wide side fixing block (302) are perpendicular to each other to form an L-shaped reference block 2 (3), and a side surface where the long side fixing block (301) and the wide side fixing block (302) are close to each other is two reference surfaces 2 of the reference block 2 (3).

3. The visual-based battery cell size detection device according to claim 2, characterized in that: It also comprises a long side push block (5) and a cylinder (6); the long side push block (5) is located between the reference block (2) and the wide side fixing block, the long side push block (5) and the long side fixing block (301) are arranged opposite to each other and a side surface of the long side push block (5) facing the long side fixing block (301) is parallel to the long side fixing block (301); the telescopic end of the cylinder (6) is connected to a connecting plate (17), the connecting plate (17) is connected to a side of the long side push block (5) away from the long side fixing block (301), and the cylinder (6) is telescopic to drive the long side push block (5) away from or close to the long side fixing block (301).

4. The visual-based battery cell size detection device according to claim 3, characterized in that: It also comprises a wide side push block (7) and a second cylinder (8); the wide side push block (7) is located between the first reference block (2) and the long side fixing block, the wide side push block (7) and the wide side fixing block (302) are arranged opposite to each other and a side thereof facing the wide side fixing block (302) is parallel to the wide side fixing block (302); a second connecting plate (18) is connected to the telescopic end of the second cylinder (8), the second connecting plate (18) is connected to a side of the wide side push block (7) away from the wide side fixing block (302), and the second cylinder (8) is telescopic to drive the wide side push block (7) away from or close to the wide side fixing block (302).

5. The visual-based battery cell size detection device according to claim 4, characterized in that: It also includes a bottom plate (9), and the four corners of the bottom of the base (4) are connected to the bottom plate (9) through columns (10), and the cylinder 1 (6) and the cylinder 2 (8) are both installed on the bottom of the base (4).

6. The visual-based battery cell size detection device according to claim 1, characterized in that: It also comprises an adjusting member, which is connected to the visual detection component (1) and is used to adjust the position of the visual detection component (1) above the reference block 1 (2).

7. The visual-based battery cell size detection device according to claim 6, characterized in that: The adjusting member comprises an adjusting rod 1 (11), an adjusting rod 2 (12) and an adjusting rod 3 (13); the adjusting rod 1 (11) is arranged vertically and has a base (19) connected to its bottom; the adjusting rod 2 (12) is arranged horizontally and is perpendicular to the adjusting rod 1 (11); one end of the adjusting rod 2 (12) is movably connected to the top end of the adjusting rod 1 (11); the adjusting rod 3 (13) is arranged horizontally and is perpendicular to the adjusting rod 2 (12); one end of the adjusting rod 3 (13) is movably connected to the other end of the adjusting rod 2 (12); and the visual detection component (1) is movably mounted on the other end of the adjusting rod 3 (13).

8. The visual-based battery cell size detection device according to claim 7, characterized in that: The top end of the adjusting rod 1 (11) is slidably connected with a clamping block 1 (14) which can rotate relative to the adjusting rod 1, and one end of the adjusting rod 2 (12) passes through the clamping block 1 (14) and is connected to the clamping block 1 (14).

9. The visual-based battery cell size detection device according to claim 7, characterized in that: One end of the adjusting rod 2 (12) away from the adjusting rod 1 (11) is slidably connected to a clamping block 2 (15) which can rotate relative to the adjusting rod 2, and one end of the adjusting rod 3 (13) passes through the clamping block 2 (15) and is connected to the clamping block 2 (15).

10. The battery cell size detection device based on vision according to claim 7, characterized in that: One end of the adjusting rod 3 (13) away from the adjusting rod 2 (12) is slidably connected to a mounting block (16) capable of rotating relative to the adjusting rod 3, and the visual detection assembly (1) is mounted on the mounting block (16).

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