Battery detection system and detection method thereof

Abstract

The invention provides a battery detection system which is arranged close to a logistics line for transporting batteries, is used for detecting welding defects of the batteries, and comprises a base, a battery feeding and discharging mechanism, a battery detection mechanism, a battery transplanting mechanism and an upper computer, the battery detection mechanism and the battery transplanting mechanism are fixedly installed on the base, a detection conveying belt, a discharging conveying belt and an NG conveying belt are sequentially arranged on the base in parallel, and the battery feeding and discharging mechanism is used for grabbing undetected batteries on a logistics line to the detection conveying belt and grabbing qualified batteries on the discharging conveying belt to the logistics line. The battery transferring mechanism is arranged at the end, away from the logistics line, of the base and used for transferring the batteries among the detection conveying belt, the discharging conveying belt and the NG conveying belt. According to the battery detection system and the detection method thereof provided by the invention, the battery detection system can collect the two-dimensional image and the three-dimensional image and detect the welding appearance defect of the battery.

Description

Technical Field

[0001] The present invention relates to the technical field of battery detection, and particularly relates to a battery detection system and a detection method thereof. Background Art

[0002] With the rapid development of new energy vehicles and energy storage systems, the production quality and safety of power batteries have received extensive attention. As a key process in battery manufacturing, the quality of battery welding directly affects the structural integrity, reliability, safety, and performance of the battery. However, in the prior art, various welding defects may still occur after battery welding, such as poor welding, incomplete welding circles, missed welding, welding deviation, welding tracks exceeding the edge of the pole column, excessive pit area, and false welding. These problems not only affect the electrical performance of the battery but also may lead to safety hazards such as liquid leakage, short circuit, and even fire.

[0003] The traditional welding defect detection process mainly relies on manual visual inspection, which has obvious limitations. First, manual inspection is inefficient and difficult to meet the needs of large-scale production. Second, the detection results highly depend on the experience and subjective judgment of the operators, and there are significant differences in the detection levels among different personnel, resulting in unstable detection effects. In addition, it is difficult for manual inspection to detect minor welding defects, and it is easy to miss detections, thus affecting the overall quality of the battery. Summary of the Invention

[0004] Embodiments of the present invention provide a battery detection system and a detection method thereof to solve the problems in the prior art that the speed of manually detecting batteries is slow and it is difficult to detect minor welding defects.

[0005] To achieve the above object, the embodiments of the present invention adopt the following technical solutions: A battery detection system is arranged close to the logistics line for transporting batteries and is used for detecting welding defects of the batteries. It includes a base, a battery loading and unloading mechanism, a battery detection mechanism, a battery transfer mechanism, and a host computer. The battery loading and unloading mechanism is arranged across the logistics line. The battery detection mechanism and the battery transfer mechanism are fixedly installed on the base. On the base, a detection conveyor belt, a blanking conveyor belt, and an NG conveyor belt are arranged in parallel in sequence. The battery loading and unloading mechanism is used to grab the untested batteries on the logistics line to the detection conveyor belt and grab the batteries with qualified detections on the blanking conveyor belt to the logistics line. The battery transfer mechanism is arranged at one end of the base far from the logistics line and is used to transfer the batteries among the detection conveyor belt, the blanking conveyor belt, and the NG conveyor belt;

[0006] The battery detection mechanism includes a first bracket, on which a first linear module arranged parallel to the extension direction of the detection conveyor belt and a second linear module arranged perpendicular to the extension direction of the detection conveyor belt are respectively provided. A first battery detection device is installed on the first linear module, and a second battery detection device is installed on the second linear module;

[0007] Two groups of first side cameras are symmetrically arranged on the first battery detection device. The sight lines of the two groups of first side cameras are respectively directed towards the two sides of the battery top that are parallel to the conveying direction of the detection conveyor belt. A middle camera group with its sight line directed towards the battery top is also arranged on the first battery detection device. Two groups of second side cameras are symmetrically arranged on the second battery detection device. The sight lines of the two groups of second side cameras are respectively directed towards the two sides of the battery top that are perpendicular to the conveying direction of the detection conveyor belt;

[0008] The host computer is used to process the images obtained by the first battery detection device and the second battery detection device, and control the battery loading and unloading mechanism, battery detection mechanism, battery transplanting mechanism, detection conveyor belt, unloading conveyor belt, and NG conveyor belt.

[0009] Further, a barcode scanner is arranged on the detection conveyor belt. The barcode scanner is used to scan the marks on the battery and transmit the scanning data to the host computer. The barcode scanner is electrically connected to the host computer.

[0010] Further, a first battery positioning device and a second battery positioning device are arranged on the detection conveyor belt. The first battery positioning device is used to stop the battery from moving when it is at the detection position of the first battery detection device, and the second battery positioning device is used to stop the battery from moving when it is at the detection position of the second battery detection device.

[0011] Further, both the first side camera group and the second side camera group include a first mounting base. A first planar camera is arranged on the first mounting base with its sight line facing downwards. The first planar camera is used to collect the two-dimensional image of the plane parallel to the battery moving direction of the battery. A reflector is also arranged on the first mounting base below the first planar camera. The reflector is used to change the optical path of the first planar camera so that the first planar camera can collect the two-dimensional image of the welding area on the side of the battery parallel to the battery moving direction. A first stereo camera is arranged on the first mounting base. The first stereo camera is used to collect the three-dimensional image of the welding area between the plane photographed by the first planar camera on the battery and the battery top cover;

[0012] The second side camera group also includes a first light source arranged on the first mounting base for irradiating the battery.

[0013] Further, the middle camera group includes a second mounting base. A second planar camera is arranged on the second mounting base with its sight line facing downwards. The second planar camera is used to collect the two-dimensional image of the battery top cover. A second stereo camera is arranged on the second mounting base. The second stereo camera is used to collect the three-dimensional image of the welding area between the battery top cover and the sealing nail. A second light source for irradiating the battery is also arranged on the second mounting base.

[0014] Further, the battery transplanting mechanism includes a third linear module and a moving conveyor belt disposed at the output end of the third linear module. The third linear module is used to move the moving conveyor belt to the end of the detection conveyor belt, the blanking conveyor belt, or the NG conveyor belt, so that the battery on the detection conveyor belt is moved to the blanking conveyor belt or the NG conveyor belt through the moving conveyor belt.

[0015] Further, the battery loading and unloading mechanism includes a second bracket, on which two groups of manipulators are arranged above the logistics line, and the two groups of manipulators are respectively arranged at both ends of the second bracket. One of the two groups of manipulators is used to move the battery on the logistics line to the detection conveyor belt, and the other group of manipulators is used to move the qualified battery on the battery transplanting mechanism to the logistics line.

[0016] A battery detection method uses the aforementioned battery detection system to detect welding defects of the battery, and has the following operation steps:

[0017] S1. Start the battery loading and unloading mechanism so that the battery moves to the detection conveyor belt through the battery loading and unloading mechanism;

[0018] S2. Start the detection conveyor belt so that the battery moves through the detection conveyor belt;

[0019] S3. When the battery reaches the detection position of the first battery detection device, the two-dimensional image and three-dimensional image of the welding area between the surface of the battery case parallel to the moving direction of the detection conveyor belt and the battery top cover are taken by the first battery detection device, and the two-dimensional image and three-dimensional image of the welding area between the battery top cover and the sealing nail are taken by the first battery detection device. The first battery detection device transmits the taken two-dimensional image and three-dimensional image to the host computer;

[0020] S4. When the battery reaches the detection position of the second battery detection device, the two-dimensional image and three-dimensional image of the welding area between the surface of the battery case perpendicular to the moving direction of the detection conveyor belt and the battery top cover are taken by the second battery detection device, and the second battery detection device transmits the taken two-dimensional image and three-dimensional image to the host computer;

[0021] S5. The host computer determines whether the welding quality of the battery is qualified through the transmitted two-dimensional image and three-dimensional image, thereby controlling the battery transplanting mechanism to move the qualified battery to the blanking conveyor belt and move the unqualified battery to the NG conveyor belt. The battery loading and unloading mechanism moves the battery on the blanking conveyor belt to the logistics line.

[0022] The beneficial effects of the present invention are:

[0023] The battery detection system and its detection method provided by the present invention enable the battery detection system to collect two-dimensional and three-dimensional images of the welding area between the top cover and the housing of the battery, as well as two-dimensional and three-dimensional images of the welding area between the top cover and the sealing nail of the battery through the provided battery detection mechanism, so as to detect the welding appearance defects of the battery; and through the battery loading and unloading mechanism, the NG conveyor belt, the unloading conveyor belt and the battery transplanting mechanism, the qualified and unqualified batteries in the batteries to be tested can be separated, and the qualified batteries can enter the subsequent procedures along with the logistics line. Brief Description of the Drawings

[0024] Figure 1 is a perspective view of the battery detection system;

[0025] Figure 2 is a schematic structural diagram of the battery loading and unloading mechanism;

[0026] Figure 3 is a schematic structural diagram of the battery detection mechanism;

[0027] Figure 4 is a schematic structural diagram of the battery transplanting mechanism;

[0028] Figure 5 is a schematic structural diagram of the second battery detection device;

[0029] Figure 6 is a schematic structural diagram of the first battery detection device;

[0030] Figure 7 is a schematic structural diagram of the first side-mounted camera group;

[0031] Figure 8 is a schematic structural diagram of the middle-mounted camera group.

[0032] Description of the Reference Numerals:

[0033] 1. Battery loading and unloading mechanism; 101. Manipulator; 102. Second bracket; 2. Battery detection mechanism; 201. First bracket; 202. First battery detection device; 2021. First side-mounted camera group; 20211. First mounting base; 20212. First planar camera; 20213. Reflector; 20214. First stereo camera; 2022. Middle-mounted camera group; 20221. Second mounting base; 20222. Second planar camera; 20223. Second stereo camera; 20224. Second light source; 203. Second battery detection device; 2031. Second side-mounted camera group; 20311. First light source; 204. First linear module; 205. Second linear module; 3. Battery transplanting mechanism; 301. Third linear module; 302. Moving conveyor belt; 4. Base; 5. Battery; 6. Logistics line; 7. Host computer; 8. Detection conveyor belt; 9. Unloading conveyor belt; 10. NG conveyor belt; 11. Barcode scanner; 12. First battery positioning device; 13. Second battery positioning device. Detailed implementation manners

[0034] The following will describe in detail the specific implementation manners of the present application with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0035] As Figure 1-8 shown, an embodiment of the present invention provides a battery detection system, which is arranged close to the logistics line 6 for transporting the battery 5 and is used for detecting welding defects of the battery 5. The battery detection system includes a base 4, a battery loading and unloading mechanism 1, a battery detection mechanism 2, a battery transplanting mechanism 3 and a host computer 7. The battery loading and unloading mechanism 1 is arranged across the logistics line 6. The battery detection mechanism 2 and the battery transplanting mechanism 3 are fixedly installed on the base 4. The detection conveyor belt 8, the unloading conveyor belt 9 and the NG conveyor belt 10 are sequentially arranged on the base 4 in parallel. The battery loading and unloading mechanism 1 is used to grab the undetected battery 5 on the logistics line 6 to the detection conveyor belt 8 and grab the qualified battery 5 on the unloading conveyor belt 9 to the logistics line 6. The battery transplanting mechanism 3 is arranged at one end of the base 4 far from the logistics line 6 and is used to transplant the battery 5 among the detection conveyor belt 8, the unloading conveyor belt 9 and the NG conveyor belt 10;

[0036] In order to read the barcode information on the goods, such as product number, batch and quantity, etc., classify the detected battery 5 and reduce the operation time. In a preferred embodiment of the present invention, a barcode scanner 11 is provided on the detection conveyor belt 8. The barcode scanner 11 is used to scan the mark on the battery 5 and transmit the scanned data to the host computer 7. The barcode scanner 11 is electrically connected to the host computer 7 (the barcode scanner 11 has various embodiments in the prior art, and the specific structure of the barcode scanner 11 will not be described in detail here);

[0037] The battery detection mechanism 2 includes a first bracket 201. A first linear module 204 arranged parallel to the extending direction of the detection conveyor belt 8 and a second linear module 205 arranged perpendicular to the extending direction of the detection conveyor belt 8 are respectively provided on the first bracket 201. A first battery detection device 202 is installed on the first linear module 204, and a second battery detection device 203 is installed on the second linear module 205;

[0038] In order to enable the battery 5 to accurately move to the detection positions of the first battery detection device 202 and the second battery detection device 203, in a preferred embodiment of the present invention, a first battery positioning device 12 and a second battery positioning device 13 are provided on the detection conveyor belt 8. The first battery positioning device 12 is used to stop the movement of the battery 5 when it is at the detection position of the first battery detection device 202, and the second battery positioning device 13 is used to stop the movement of the battery 5 when it is at the detection position of the second battery detection device 203 (when the battery 5 reaches the first battery positioning device 12, it is blocked by the lever of the first battery positioning device 12, and the host computer 7 controls the detection conveyor belt 8 to stop running, so that the relative position of the battery 5 and the detection conveyor belt 8 does not change during the detection process of the first battery detection device 202; the first battery positioning device 12 retracts the lever, the battery 5 is no longer blocked, and the host computer 7 controls the detection conveyor belt 8 to continue running, and the battery 5 continues to move along with the detection conveyor belt 8; when the battery 5 reaches the second battery positioning device 13, it is blocked by the lever of the second battery positioning device 13, and the host computer 7 controls the detection conveyor belt 8 to stop running, so that the relative position of the battery 5 and the detection conveyor belt 8 does not change during the detection process of the second battery detection device 203; there are multiple embodiments in the prior art for the first battery positioning device 12 and the second battery positioning device 13 to fix the battery 5, and the specific structures of the first battery positioning device 12 and the second battery positioning device 13 are not described in detail here).

[0039] Two groups of first side cameras 2021 are symmetrically arranged on the first battery detection device 202. The lines of sight of the two groups of first side cameras 2021 are respectively directed towards the two sides of the top of the battery 5 parallel to the conveying direction of the detection conveyor belt 8. A middle camera 2022 with a line of sight directed towards the top of the battery 5 is also provided on the first battery detection device 202. Two groups of second side cameras 2031 are symmetrically arranged on the second battery detection device 203. The lines of sight of the two groups of second side cameras 2031 are respectively directed towards the two sides of the top of the battery 5 perpendicular to the conveying direction of the detection conveyor belt 8;

[0040] The host computer 7 is used to process the images acquired by the first battery detection device 202 and the second battery detection device 203 and control the battery loading and unloading mechanism 1, the battery detection mechanism 2, the battery transplanting mechanism 3, the detection conveyor belt 8, the unloading conveyor belt 9, and the NG conveyor belt 10.

[0041] Both the first side-mounted camera group 2021 and the second side-mounted camera group 2031 include a first mounting base 20211. A first planar camera 20212 is disposed on the first mounting base 20211 with its line of sight facing downward. The first planar camera 20212 is used to collect two-dimensional images of the plane parallel to the moving direction of the battery 5. A reflector 20213 is also disposed on the first mounting base 20211 below the first planar camera 20212. The reflector 20213 is used to change the optical path of the first planar camera 20212 so that the first planar camera 20212 can collect two-dimensional images of the welding area on the side surface of the battery 5 parallel to the moving direction of the battery 5. A first stereo camera 20214 is disposed on the first mounting base 20211. The first stereo camera 20214 is used to collect three-dimensional images of the welding area between the surface photographed by the first planar camera 20212 on the battery 5 and the top cover of the battery 5.

[0042] The second side-mounted camera group 2031 further includes a first light source 20311 disposed on the first mounting base 20211 for irradiating the battery 5.

[0043] The in-position camera group 2022 includes a second mounting base 20221. A second planar camera 20222 is disposed on the second mounting base 20221 with its line of sight facing downward. The second planar camera 20222 is used to collect two-dimensional images of the top cover of the battery 5. A second stereo camera 20223 is disposed on the second mounting base 20221. The second stereo camera 20223 is used to collect three-dimensional images of the welding area between the top cover of the battery 5 and the sealing nail of the battery 5. A second light source 20224 for irradiating the battery 5 is also disposed on the second mounting base 20221.

[0044] The present invention is used to detect the welding areas between the top cover of the battery 5 and the housing of the battery 5, and between the top cover of the battery 5 and the sealing nail of the battery 5. The welding appearance defect items that can be detected include: welding pits (pit depth ≥ 0.2 mm, pit diameter ≥ 0.2 mm, number of pits), welding explosion points (explosion point depth ≥ 0.2 mm, explosion point diameter ≥ 0.2 mm, number of explosion points), welding pinholes (pinhole depth ≥ 0.2 mm, pinhole diameter ≥ 0.2 mm, number of pinholes, position of pinholes), wavy edges (height of wavy edge ≥ 0.2 mm), convex points (convex point height ≥ 0.2 mm, convex point diameter ≥ 0.2 mm), welding wire offset (weld seam higher than the housing surface ≥ 0.2 mm), welding wire length (broken weld distance > 0.2 mm), welding wire width (height > 0.2 mm).

[0045] Specifically, in the battery detection device of the present invention, the detection of welding defects is comprehensively determined by the two-dimensional images collected by the first planar camera 20212 and the second planar camera 20222 and the three-dimensional images collected by the first stereo camera 20214 and the second stereo camera 20223.

[0046] For wire bonding offset, wire bonding length, and wire bonding width, a trained two-dimensional detection model can be used to make a determination on the two-dimensional image once, and a trained three-dimensional detection model can be used to make another determination on the three-dimensional image. If the results of both determinations are qualified, a qualified result is output. For defects in depth and height, such as bumps and pits, a trained two-dimensional detection model can be used to mark suspected defects on the two-dimensional image, and further, a trained three-dimensional detection model can be used to make a determination on the three-dimensional image.

[0047] The battery transplanting mechanism 3 includes a third linear module 301 and a moving conveyor belt 302 arranged at the output end of the third linear module 301. The third linear module 301 is used to move the moving conveyor belt 302 to the tail ends of the detection conveyor belt 8, the blanking conveyor belt 9, or the NG conveyor belt 10, so that the battery 5 on the detection conveyor belt 8 is moved to the blanking conveyor belt 9 or the NG conveyor belt 10 through the moving conveyor belt 302, thereby entering different subsequent procedures.

[0048] The battery loading and unloading mechanism 1 includes a second bracket 102. Two groups of manipulators 101 are arranged on the second bracket 102 above the logistics line 6, and the two groups of manipulators 101 are respectively arranged at both ends of the second bracket 102. One of the two groups of manipulators 101 is used to move the battery 5 on the logistics line 6 to the detection conveyor belt 8, and the other group of manipulators 101 is used to move the qualified battery 5 on the blanking conveyor belt 9 to the logistics line 6 (there are various embodiments of the method for the manipulator 101 to move the battery 5 in the prior art, and the specific structure of the manipulator 101 will not be elaborated here).

[0049] The embodiment of the present invention provides a battery detection method for a battery detection system, which has the following operation steps:

[0050] S1. Start the battery loading and unloading mechanism 1 so that the battery 5 is moved to the detection conveyor belt 8 through the battery loading and unloading mechanism 1;

[0051] S2. Start the detection conveyor belt 8 so that the battery 5 moves through the detection conveyor belt 8;

[0052] S3. When the battery 5 reaches the detection position of the first battery detection device 202, the first battery detection device 202 takes a two-dimensional image and a three-dimensional image of the welding area between the surface of the battery 5 shell parallel to the moving direction of the detection conveyor belt 8 and the battery 5 top cover, and takes a two-dimensional image and a three-dimensional image of the welding area between the top cover of the battery 5 and the sealing nail. The first battery detection device 202 transmits the taken two-dimensional image and three-dimensional image to the host computer 7;

[0053] S4. When the battery 5 reaches the detection position of the second battery detection device 203, the second battery detection device 203 captures the two-dimensional image and three-dimensional image of the welding area between the surface of the battery 5 housing perpendicular to the moving direction of the detection conveyor belt 8 and the battery 5 top cover, and the second battery detection device 203 transmits the captured two-dimensional image and three-dimensional image to the host computer 7;

[0054] S5. The host computer 7 determines whether the welding quality of the battery 5 is qualified through the transmitted two-dimensional image and three-dimensional image, thereby controlling the battery transplanting mechanism 3 to move the battery 5 with qualified quality to the blanking conveyor belt 9 and move the battery 5 with unqualified quality to the NG conveyor belt 10. The battery loading and unloading mechanism 1 moves the battery 5 on the blanking conveyor belt 9 to the logistics line 6.

[0055] For the battery detection system and its detection method, through the provided battery detection mechanism 2, the battery detection system can collect the two-dimensional image and three-dimensional image of the welding area between the top cover of the battery 5 and the battery 5 housing, and collect the two-dimensional image and three-dimensional image of the welding area between the top cover of the battery 5 and the sealing nail, so as to detect the welding appearance defects of the battery 5; and through the battery loading and unloading mechanism 1, the NG conveyor belt 10, the blanking conveyor belt 9 and the battery transplanting mechanism 3, the battery 5 with qualified welding and the battery 5 with unqualified welding in the battery 5 to be detected can be separated, and the battery 5 with qualified welding can enter the subsequent process along with the logistics line 6.

[0056] The above embodiments only represent the implementation modes of the present invention, but should not be construed as limiting the scope of the present invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent should be subject to the appended claims.

Claims

1. A battery inspection system, arranged near a logistics line (6) for transporting batteries (5), for inspecting the batteries (5) for welding defects, characterized in that: The invention comprises a base (4), a battery loading and unloading mechanism (1), a battery detection mechanism (2), a battery transplanting mechanism (3) and a host computer (7); the battery loading and unloading mechanism (1) is arranged across a logistics line (6); the battery detection mechanism (2) and the battery transplanting mechanism (3) are fixedly mounted on the base (4); a detection conveyor belt (8), a discharge conveyor belt (9) and an NG conveyor belt (10) are arranged on the base (4) in parallel with each other in sequence; the battery loading and unloading mechanism (1) is used to grab undetected batteries (5) on the logistics line (6) to the detection conveyor belt (8) and to grab qualified batteries (5) on the discharge conveyor belt (9) to the logistics line (6); the battery transplanting mechanism (3) is arranged at one end of the base (4) away from the logistics line (6) and is used to transplant batteries (5) between the detection conveyor belt (8), the discharge conveyor belt (9) and the NG conveyor belt (10); The battery detection mechanism (2) comprises a first bracket (201), on which a first linear module (204) arranged parallel to the extension direction of the detection conveyor belt (8) and a second linear module (205) arranged perpendicular to the extension direction of the detection conveyor belt (8) are respectively arranged, the first linear module (204) is mounted with a first battery detection device (202), and the second linear module (205) is mounted with a second battery detection device (203); Two groups of first side camera groups (2021) are symmetrically arranged on the first battery detection device (202), and the sight lines of the two groups of first side camera groups (2021) are respectively oriented toward the top of the battery (5) and two sides parallel to the conveying direction of the detection conveyor belt (8); the first battery detection device (202) is also provided with a center camera group (2022) whose sight line is oriented toward the top of the battery (5); and the second battery detection device (203) is symmetrically arranged with two groups of second side camera groups (2031), and the sight lines of the two groups of second side camera groups (2031) are respectively oriented toward the top of the battery (5) and two sides perpendicular to the conveying direction of the detection conveyor belt (8); The host computer (7) is used to process images acquired by the first battery detection device (202) and the second battery detection device (203) and to control the battery loading and unloading mechanism (1), the battery detection mechanism (2), the battery transplanting mechanism (3), the detection conveyor belt (8), the unloading conveyor belt (9) and the NG conveyor belt (10).

2. The battery detection system according to claim 1, characterized in that: A barcode scanning gun (11) is arranged on the detection conveyor belt (8). The barcode scanning gun (11) is used to scan the mark on the battery (5) and transmit the scanned data to the host computer (7). The barcode scanning gun (11) is electrically connected to the host computer (7).

3. The battery detection system according to claim 1, characterized in that: A first battery positioning device (12) and a second battery positioning device (13) are provided on the detection conveyor belt (8); the first battery positioning device (12) is used to stop the battery (5) from moving when it is at a detection position of the first battery detection device (202); and the second battery positioning device (13) is used to stop the battery (5) from moving when it is at a detection position of the second battery detection device (203).

4. The battery detection system according to claim 1, characterized in that: The first side camera group (2021) and the second side camera group (2031) both include a first mounting seat (20211), a first plane camera (20212) is arranged on the first mounting seat (20211) with a line of sight facing downward, the first plane camera (20212) is used to collect a two-dimensional image of the battery (5) and a plane parallel to the moving direction of the battery (5), and the first mounting seat (20211) is also provided with a reflector (20213) located below the first plane camera (20212) to reflect The mirror (20213) is used to change the optical path of the first plane camera (20212) so that the first plane camera (20212) can collect a two-dimensional image of the welding area on the side of the battery (5) parallel to the moving direction of the battery (5); the first mounting seat (20211) is provided with a first stereo camera (20214), and the first stereo camera (20214) is used to collect a three-dimensional image of the welding point between the surface of the battery (5) photographed by the first plane camera (20212) and the top cover of the battery (5); The second side camera group (2031) also includes a first light source (20311) disposed on the first mounting seat (20211) for illuminating the battery (5).

5. The battery detection system according to claim 1, characterized in that: The central camera group (2022) comprises a second mounting seat (20221), a second plane camera (20222) is arranged on the second mounting seat (20221) with a line of sight facing downward, the second plane camera (20222) is used to collect a two-dimensional image of the top cover of the battery (5), a second stereo camera (20223) is arranged on the second mounting seat (20221), the second stereo camera (20223) is used to collect a three-dimensional image of a welding point between the top cover of the battery (5) and the sealing pin, and a second light source (20224) for irradiating the battery (5) is also arranged on the second mounting seat (20221).

6. The battery detection system according to claim 1, characterized in that: The battery transplanting mechanism (3) comprises a third linear module (301) and a moving conveyor belt (302) arranged at the output end of the third linear module (301); the third linear module (301) is used to move the moving conveyor belt (302) to the tail end of a detection conveyor belt (8), a material discharge conveyor belt (9) or an NG conveyor belt (10), so that the battery (5) on the detection conveyor belt (8) is moved to the material discharge conveyor belt (9) or the NG conveyor belt (10) through the moving conveyor belt (302).

7. The battery detection system according to claim 1, characterized in that: The battery loading and unloading mechanism (1) comprises a second bracket (102), on which two groups of manipulators (101) are arranged above a logistics line (6), and the two groups of manipulators (101) are respectively arranged at two ends of the second bracket (102), one of the two groups of manipulators (101) is used to move batteries (5) on the logistics line to a detection conveyor belt (8), and the other group of manipulators (101) is used to move batteries (5) with qualified quality on a battery transplanting mechanism (3) to the logistics line.

8. A battery detection method, using the battery detection system according to any one of claims 1 to 7 to detect welding defects on a battery (5), characterized in that: The operation steps are as follows: S1, starting the battery loading and unloading mechanism (1), so that the battery (5) moves to the detection conveyor belt (8) through the battery loading and unloading mechanism (1); S2, starting the detection conveyor belt (8), so that the battery (5) moves through the detection conveyor belt (8); S3. When the battery (5) reaches the detection position of the first battery detection device (202), the first battery detection device (202) captures a two-dimensional image and a three-dimensional image of the welding area between the surface of the battery (5) shell parallel to the moving direction of the detection conveyor belt (8) and the top cover of the battery (5), and captures a two-dimensional image and a three-dimensional image of the welding area between the top cover of the battery (5) and the sealing pin, and the first battery detection device (202) transmits the captured two-dimensional image and three-dimensional image to the host computer (7); S4. When the battery (5) reaches the detection position of the second battery detection device (203), the second battery detection device (203) captures a two-dimensional image and a three-dimensional image of the welding area between the surface of the battery (5) shell perpendicular to the moving direction of the detection conveyor belt (8) and the top cover of the battery (5), and the second battery detection device (203) transmits the captured two-dimensional image and three-dimensional image to the host computer (7); S5, the upper computer 7 determines whether the welding quality of the battery (5) is qualified through the transmitted two-dimensional image and three-dimensional image, thereby controlling the battery transfer mechanism (3) to move the qualified battery (5) to the unloading conveyor belt 9, and move the unqualified battery (5) to the NG conveyor belt (10), and the battery loading and unloading mechanism (1) to move the battery (5) on the unloading conveyor belt (9) to the logistics line (6).

Images