Large cylindrical battery cathode collector plate detection equipment

Abstract

The invention discloses detection equipment for a negative collector plate of a large cylindrical battery, and belongs to the technical field of negative collector plate detection. A large cylindrical battery cathode collector plate detection device comprises a magnetic suspension visual detection mechanism, the magnetic suspension visual detection mechanism comprises an annular magnetic suspension detection platform and a detection module installed on the annular magnetic suspension detection platform, and the annular magnetic suspension detection platform is provided with a transparent jig used for placing a cathode collector plate; wherein the detection module comprises a plurality of groups of high-speed area array camera devices which are sequentially arranged along the moving direction of the transparent jig; by adopting a plurality of groups of high-speed area-array cameras, matching with a multi-angle annular light source and combining with a plurality of groups of light sources with different emission angles, two illumination modes of bright field and dark field are provided, appearance defects are presented on an image, and the material taking and placing time can be overlapped through a high-speed mobile shooting technology that the arranged magnetic suspension visual detection mechanism is matched with the detection module; overall time is shortened, and efficient and rapid detection is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of negative current collector plate detection, and particularly relates to a large cylindrical battery negative current collector plate detection equipment. BACKGROUND

[0002] As a core key component of a large cylindrical battery, the negative current collector plate bears the core function of electrical connection between the cell tab and the battery shell, and simultaneously affects the injection efficiency and infiltration effect of the electrolyte. The quality of the negative current collector plate directly determines the charge-discharge performance, overcurrent capacity and safety stability of the battery. If the negative current collector plate has defects such as deformation and poor welding, problems such as virtual welding, empty welding and internal short circuit are easily caused, and in severe cases, the battery temperature rise is abnormal, open circuit failure or even safety risk is caused.

[0003] However, due to the fact that the automatic production process of the large cylindrical battery is not perfect, especially the core processes such as full-tab welding and tab shaping have very high requirements on the precision of the components, the detection of the negative current collector plate in the current industry still relies on traditional manual methods. The detection operation is usually completed manually under the illumination of light, and some small defects need to be observed with the aid of a magnifying glass. For the detection of suspected defective products and the flatness of the welding points, the aperture size and other key size parameters, a 2.5-dimensional measuring instrument needs to be further used for confirmation. SUMMARY

[0004] The purpose of the present application is to solve the problems raised in the background art, and a large cylindrical battery negative current collector plate detection equipment is provided.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme: A large cylindrical battery negative current collector plate detection equipment, comprising a magnetic suspension visual detection mechanism, the magnetic suspension visual detection mechanism comprising a ring-shaped magnetic suspension detection platform and a detection module installed on the ring-shaped magnetic suspension detection platform, and a transparent jig for placing the negative current collector plate being arranged on the ring-shaped magnetic suspension detection platform; wherein the detection module comprises a plurality of high-speed area array camera units arranged in sequence along the moving direction of the transparent jig.

[0006] Preferably, the high-speed area array camera unit comprises the following arranged in sequence: a high-precision 3D camera installed on the ring-shaped magnetic suspension detection platform, for measuring the flatness of the negative current collector plate; a telecentric lens of a first high-speed area array camera installed on the ring-shaped magnetic suspension detection platform, for measuring the mouth diameter and tab roundness of the negative current collector plate; a telecentric lens of a second high-speed area array camera installed on the ring-shaped magnetic suspension detection platform, for measuring the bottom diameter of the negative current collector plate; A third high-speed area array camera group, a fourth high-speed area array camera group, a fifth high-speed area array camera group and a sixth high-speed area array camera group are installed on the annular magnetic suspension detection platform, and are used for detecting the appearance defects of the negative current collecting disc. A seventh high-speed area array camera is installed on the annular magnetic suspension detection platform, and is used for measuring the height and outer wall defects of the negative current collecting disc.

[0007] Preferably, the third high-speed area array camera group, the fourth high-speed area array camera group, the fifth high-speed area array camera group and the sixth high-speed area array camera group each include symmetrically arranged high-speed area array cameras, and two high-speed area array cameras are respectively arranged at the upper and lower ends of the transparent jig.

[0008] Preferably, the seventh high-speed area array camera is provided with three groups.

[0009] Preferably, the appearance defects include one or more of the following: crushing, scratching, dirt, deformation and yellowing due to oxidation.

[0010] Preferably, the method further comprises: A roller line group is used for transporting the insertion basket storing the negative current collecting disc. A material taking part is used for disassembling the insertion basket and taking out the negative current collecting disc. A product adjusting part is used for adjusting the negative current collecting disc taken out by the material taking part and transporting the negative current collecting disc to the transparent jig by a mechanical hand. A classification and storage device is used for storing the negative current collecting disc after detection by the detection module.

[0011] Preferably, the product adjusting part includes a CCD positioning mechanism and a variable distance deviation correction mechanism, the CCD positioning mechanism is used for monitoring the position of the negative current collecting disc, and the variable distance deviation correction mechanism is used for adjusting the distance between two adjacent negative current collecting discs.

[0012] Preferably, the classification and storage device includes an OK product storage mechanism and an NG product storage mechanism.

[0013] Preferably, the OK product storage mechanism includes an OK product temporary storage station and an OK product tray loading mechanism, the OK product temporary storage station is provided with an OK product temporary storage tray, the OK product tray loading mechanism is provided with a tray for storing the negative current collecting disc, the OK product tray loading mechanism is provided with a tray loading position, the OK product temporary storage station is provided with a first four-axis mechanical arm, and the first four-axis mechanical arm is used for moving the negative current collecting disc on the OK product temporary storage tray to the tray on the tray loading position. The OK product tray loading mechanism is further provided with a tray loading position.

[0014] Preferably, the NG product storage mechanism comprises an NG product temporary storage station and an NG product tray loading mechanism, the NG product temporary storage station is provided with an NG product temporary storage tray, and the NG product tray loading mechanism is provided with a plurality of groups of NG blister tray loading positions for placing blister trays. The NG product tray loading mechanism is used to move the negative current collector disc of the NG product on the NG product temporary storage tray to the blister tray.

[0015] Compared with the prior art, the present application provides a large cylindrical battery negative current collector disc detection equipment, which has the following advantages: 1. The large cylindrical battery negative current collector disc detection equipment adopts eight high-speed area array cameras installed above and below, is matched with a high-angle ring light source, a low-angle ring light source, a coaxial light source and other light sources, combines multiple groups of light sources with different emission angles, uses bright field and dark field illumination modes, presents appearance defects such as crushing, scratching, dirt, deformation and yellowing caused by oxidation on the image, and achieves detection effect through algorithmic graphic processing and industrial detection large model deep learning training. The detection accuracy can reach 0.05 mm. The light source adopts a high-speed stroboscopic mode, can instantly brighten 4-5 times, shortens the camera exposure vision, and realizes high-speed moving shooting.

[0016] 2. The large cylindrical battery negative current collector disc detection equipment can overlap the feeding and placing time, shorten the overall time, and efficiently and quickly detect through the magnetic suspension visual detection mechanism cooperating with the high-speed moving shooting technology of the detection module. 3. The large cylindrical battery negative current collector disc detection equipment can reduce the number of product transfers, reduce the structural deformation of the product, and improve the production efficiency and product quality through reasonable equipment layout. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A structure diagram of a large cylindrical battery negative current collector disc detection equipment is provided. Figure 2 A structure diagram of a material taking part of a large cylindrical battery negative current collector disc detection equipment is provided. Figure 3 A structure diagram of a product adjusting part of a large cylindrical battery negative current collector disc detection equipment is provided. Figure 4 A structure diagram of a large cylindrical battery negative current collector disc detection equipment is provided. Figure 3 A structure diagram of part A of a large cylindrical battery negative current collector disc detection equipment is provided. Figure 5 A structure diagram of a variable-distance deviation rectifying mechanism of a large cylindrical battery negative current collector disc detection equipment is provided. Figure 6A plan view of a magnetic suspension visual inspection mechanism of a large cylindrical battery negative current collector plate detection equipment according to the present application; Figure 7 A structural schematic diagram of a magnetic suspension visual inspection mechanism of a large cylindrical battery negative current collector plate detection equipment according to the present application; Figure 8 A structural schematic diagram of a large cylindrical battery negative current collector plate detection equipment according to the present application; Figure 7 A structural schematic diagram of a B part of the middle part; Figure 9 A structural schematic diagram of a first four-axis mechanical arm of a large cylindrical battery negative current collector plate detection equipment according to the present application; Figure 10 A structural schematic diagram of an OK product temporary storage station of a large cylindrical battery negative current collector plate detection equipment according to the present application; Figure 11 A plan view of an NG product tray loading mechanism of a large cylindrical battery negative current collector plate detection equipment according to the present application; Figure 12 A structural schematic diagram of an NG product tray loading mechanism of a large cylindrical battery negative current collector plate detection equipment according to the present application; Figure 13 A plan view of an OK product tray loading mechanism of a large cylindrical battery negative current collector plate detection equipment according to the present application; Figure 14 A structural schematic diagram of an OK product tray loading mechanism of a large cylindrical battery negative current collector plate detection equipment according to the present application; Figure 15 A structural schematic diagram of a large cylindrical battery negative current collector plate detection equipment according to the present application; Figure 14 A structural schematic diagram of a C part of the middle part.

[0018] In the figure: 1, roller line body group; 2, material taking part; 3, product adjusting part; 301, variable distance deviation rectifying mechanism; 302, CCD positioning mechanism; 4, magnetic suspension visual inspection mechanism; 401, transparent jig; 402, annular magnetic suspension detection platform; 5, detection module; 501, high-precision 3D camera; 502, telecentric lens of first high-speed area array camera; 503, telecentric lens of second high-speed area array camera; 504, third high-speed area array camera group; 505, fourth high-speed area array camera group; 506, fifth high-speed area array camera group; 507, sixth high-speed area array camera group; 508, seventh high-speed area array camera; 6, OK product temporary storage station; 601, OK product temporary storage tray; 7, NG product temporary storage station; 701, NG product temporary storage tray; 8, OK product tray loading mechanism; 801, tray loading position; 802, tray tray loading position; 803, first four-axis mechanical arm; 9, NG product tray loading mechanism; 901, second four-axis mechanical arm; 902, NG blister tray loading position. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments.

[0020] Embodiment 1, refer to Figures 1-15 A large cylindrical battery negative pole current collector detection device, comprising a magnetic suspension visual detection mechanism 4, it should be noted that the magnetic suspension visual detection mechanism 4 is symmetrically provided with two groups, the magnetic suspension visual detection mechanism 4 comprises a ring-shaped magnetic suspension detection platform 402 and a detection module 5 installed on the ring-shaped magnetic suspension detection platform 402, the ring-shaped magnetic suspension detection platform 402 is provided with a transparent jig 401 for placing the negative pole current collector, the material of the transparent jig 401 is glass, which is convenient for subsequent high-speed area array camera shooting from the bottom; wherein the detection module 5 comprises a plurality of high-speed area array camera components arranged in sequence along the moving direction of the transparent jig 401; Through the high-speed moving shooting technology of the magnetic suspension visual detection mechanism 4 cooperating with the detection module 5, the overlapping feeding and placing time can be overlapped, the overall time can be shortened, and high-efficiency and rapid detection can be realized.

[0021] The high-speed area array camera component comprises in sequence: A high-precision 3D camera 501 installed on the ring-shaped magnetic suspension detection platform 402, the high-precision 3D camera 501 performs high-speed moving scanning, measures the flatness of the negative pole current collector through the optical triangulation principle, and the measurement accuracy reaches 0.01 mm; A telecentric lens 502 of a first high-speed area array camera installed on the ring-shaped magnetic suspension detection platform 402, the telecentric lens 502 of the first high-speed area array camera is matched with a parallel light source, measures the diameter of the mouth of the negative pole current collector and the ear roundness through the transmission moving shooting mode, and the measurement accuracy reaches 0.01 mm; A telecentric lens 503 of a second high-speed area array camera installed on the ring-shaped magnetic suspension detection platform 402, the telecentric lens 503 of the second high-speed area array camera is matched with a parallel light source, and measures the diameter of the bottom of the negative pole current collector through the transmission moving shooting mode; A third high-speed area array camera group 504, a fourth high-speed area array camera group 505, a fifth high-speed area array camera group 506 and a sixth high-speed area array camera group 507 installed on the ring-shaped magnetic suspension detection platform 402 are used for detecting appearance defects of the negative pole current collector, the appearance defects include one or more of crushing, scratching, dirt, deformation and yellowing due to oxidation; the third high-speed area array camera group 504, the fourth high-speed area array camera group 505, the fifth high-speed area array camera group 506 and the sixth high-speed area array camera group 507 each comprise symmetrically arranged high-speed area array cameras, and the two high-speed area array cameras are respectively located at the upper and lower ends of the transparent jig 401; The four groups of high-speed area array cameras are matched with a high-angle ring light source, a low-angle ring light source, a coaxial light source and other light sources, combined with multiple groups of light sources with different emission angles, and two light modes of bright field and dark field, so that appearance defects such as crushing, scratching, dirt, deformation, oxidation and yellowing are presented on the image. Through algorithmic graphic processing and deep learning training of the industrial detection large model, the detection effect is achieved, and the detection accuracy can reach 0.05mm; The light source adopts a high-speed stroboscopic mode, which can instantly brighten 4-5 times, shorten the camera exposure vision, and realize high-speed moving shooting. The three groups of seventh high-speed area array cameras 508 installed on the annular magnetic suspension detection platform 402 are used to measure the height and outer wall defects of the negative current collector plate, and shoot three vertical outer walls of the product respectively. Through transmission and dark field two light modes, high-speed moving shooting is performed to measure the total height of the product and detect the outer wall defects of the product, and the accuracy can reach 0.05mm.

[0022] It also includes a roller line group 1 for transporting and storing the negative current collector plate insertion basket; The material taking part 2 is used to disassemble the insertion basket and take out the negative current collector plate; The product adjusting part 3 is used to adjust the negative current collector plate taken out by the material taking part 2 and transport it to the transparent fixture 401 by the mechanical hand.

[0023] The product adjusting part 3 includes a CCD positioning mechanism 302 and a variable distance correction mechanism 301. The CCD positioning mechanism 302 is used to monitor the position of the negative current collector plate, and the variable distance correction mechanism 301 is used to adjust the distance between the adjacent two negative current collector plates; The incoming state of the large cylindrical battery negative current collector plate is placed in the cleaning machine insertion basket in multiple layers of insertion basket stacking. The insertion basket and the material are transported by the roller line group 1. The stacked basket frame is disassembled one by one by the mechanical hand, and the disassembled single plate insertion basket and the negative current collector plate are transported to the equipment material taking part 2. The product placement position is unified in the same direction by the turnover and basket positioning device of the material taking part 2. Since the distance between the incoming negative current collector plates is small, the distance needs to be adjusted to adapt to the subsequent detection. Nine negative current collector plates are transported to the product adjusting part 3 by the flexible mechanical hand at one time. The distance between the adjacent two negative current collector plates is adjusted and corrected by the visual positioning method of the CCD positioning mechanism 302 and the variable distance correction mechanism 301, and the accuracy can reach 0.1°; Then the mechanical hand is grabbed to the transparent fixture 401 on the magnetic suspension visual detection mechanism 4 for detection; The classification and storage device is used to store the negative current collector plates after detection by the detection module 5. The classification and storage device includes an OK product storage mechanism and an NG product storage mechanism.

[0024] The OK product storage mechanism comprises an OK product temporary storage station 6 and an OK product tray loading mechanism 8. The OK product temporary storage station 6 is provided with an OK product temporary storage tray 601. The OK product tray loading mechanism 8 is provided with a tray for storing the negative electrode current collector tray. The OK product tray loading mechanism 8 is provided with a tray loading position 801. The OK product temporary storage station 6 is provided with a first four-axis mechanical arm 803. The first four-axis mechanical arm 803 is used to move the negative electrode current collector tray on the OK product temporary storage tray 601 to the tray on the tray loading position 801. The OK product tray loading mechanism 8 is further provided with a tray loading position 802.

[0025] The NG product storage mechanism comprises an NG product temporary storage station 7 and an NG product tray loading mechanism 9. The NG product temporary storage station 7 is provided with an NG product temporary storage tray 701. The NG product tray loading mechanism 9 is provided with a plurality of NG blister tray loading positions 902 for placing the blister tray. The NG product tray loading mechanism 9 is provided with a second four-axis mechanical arm 901. The NG product tray loading mechanism 9 is used to move the NG product negative electrode current collector tray on the NG product temporary storage tray 701 to the blister tray.

[0026] Embodiment 2, refer to Figures 1-15 A large cylindrical battery negative electrode current collector detection device. When using the device, the large cylindrical battery negative electrode current collector is in the form of a multi-layer stacked cleaning machine basket. After the roller line body group 1 receives the incoming material, it synchronously completes the initial inspection of the basket posture and stable transportation. During the transportation process, the device completes the parameter presetting of the turnover device and the basket positioning device of the material taking part 2 in advance. After the basket is transported to the position, the mechanical hand immediately starts the basket disassembly operation, and the basket disassembly action is carried out in parallel with the detection link of the previous batch of negative electrode current collectors, thereby reducing the waiting time. The mechanical hand transfers the disassembled single basket and the negative electrode current collector to the material taking part 2. The material taking part completes the direction calibration of all negative electrode current collectors to be detected at one time through the preset parameter turnover device and the basket positioning device, thereby ensuring the uniformity of the direction. After the calibration is completed, the flexible mechanical hand synchronously grabs 9 negative electrode current collectors and directly transports them to the product adjusting part 3, thereby saving the redundant steps of single disk transfer. The product adjusting part 3 adopts a positioning and deviation correction synchronization design. The CCD positioning mechanism 302 monitors the real-time position of the negative electrode current collector transported to it, and simultaneously transmits the position data to the variable distance deviation correction mechanism 301. The variable distance deviation correction mechanism 301 adjusts the distance between the adjacent negative electrode current collectors in real time according to the data, and completes the angle deviation correction, thereby ensuring that the distance and the posture meet the detection requirements. At the same time when the adjustment is completed, the annular magnetic suspension detection platform 402 of the magnetic suspension visual detection mechanism 4 drives the transparent jig 401 to move to the docking station, thereby realizing a smooth process of adjustment and feeding. The mechanical hand precisely places the adjusted negative current collector plate on the transparent jig 401, the annular magnetic suspension detection platform 402 drives the jig and the negative current collector plate to move continuously along the preset track, and the two groups of symmetrically arranged magnetic suspension visual detection mechanisms 4 alternately receive the negative current collector plate. The multiple groups of high-speed area array camera devices in the detection module 5 complete omnidirectional detection in turn along the moving direction, and the specific process optimization is as follows: The high-precision 3D camera 501 preferentially starts high-speed movement scanning, and completes negative current collector plate flatness measurement with an accuracy of 0.01 mm based on the optical triangulation principle; the detection data is uploaded to the system in real time; The telecentric lens 502 of the first high-speed area array camera is matched with a parallel light source, and synchronous transmission movement shooting is started, and the negative current collector plate mouth diameter and the pole ear roundness are accurately measured with an accuracy of 0.01 mm, which is complementary to the flatness detection data; The telecentric lens 503 of the second high-speed area array camera uses the parallel light source and the transmission shooting mode, and quickly completes the negative current collector plate bottom diameter measurement, realizing the centralized detection of size parameters; The four groups of high-speed area array camera groups are synchronously linked, and the upper and lower symmetric cameras are matched with multiple types of light sources such as high-angle ring light source, low-angle ring light source, coaxial light source, and quickly switch between bright field / dark field modes; the light source adopts high-speed stroboscopic mode to instantaneously brighten 4-5 times, shortens the exposure time to adapt to the high-speed movement scene; through algorithmic graphic processing and industrial detection large model cooperation, appearance defects such as crush and scratch are accurately detected with an accuracy of 0.05 mm, and the defect data is marked in real time; Three groups of seventh high-speed area array cameras 508 synchronously shoot the three vertical outer walls of the negative current collector plate, and complete the total height measurement and outer wall defect detection with an accuracy of 0.05 mm in combination with the transmission and dark field modes, and finally form a complete detection report; After the detection is completed, the system generates classification instructions according to the detection report, the mechanical hand module accurately grabs the negative current collector plate, and moves to the OK product temporary storage station 6 or the NG product temporary storage station 7 respectively, to realize preliminary classification and temporary storage; the disc loading trigger and action logic are optimized to improve the disc loading efficiency: When the negative current collector plates in the NG product temporary storage station 7 accumulate to two rows of 12, the system automatically triggers the NG product disc loading mechanism 9, the second four-axis mechanical arm 901 accurately grabs the temporarily stored NG products, and moves them to the corresponding card slots of the blister disc loading position 902 of the blister disc, to complete the standardized storage of unqualified products; When the negative current collector plates in the OK product temporary storage station 6 accumulate to two rows of 16, the OK product disc loading mechanism 8 starts the first four-axis mechanical arm 803, and moves the qualified products on the OK product temporary storage disc 601 to the tray in the tray loading position 801 in batch grabbing mode, and finally completes batch arrangement and disc loading at the tray disc loading position 802; After the tray is completed, each mechanism is automatically reset to the initial docking station, waiting for the next batch of negative electrode current collector tray to be transported; throughout the process, the system monitors the running state, detection data and material quantity of each mechanism in real time, triggers an alarm and suspends the corresponding link immediately when an exception occurs, ensuring the safety and accuracy of the operation.

[0027] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change within the technical range disclosed by the present application according to the technical solution and inventive concept of the present application, which should be covered within the protection scope of the present application.

Claims

1. A large cylindrical battery negative current collector plate inspection apparatus characterized by comprising: The magnetic suspension visual detection mechanism (4) comprises a ring-shaped magnetic suspension detection platform (402) and a detection module (5) installed on the ring-shaped magnetic suspension detection platform (402), and the ring-shaped magnetic suspension detection platform (402) is provided with a transparent jig (401) for placing a negative current collector plate. Wherein, The detection module (5) comprises a plurality of groups of high-speed area array camera components arranged in sequence along the moving direction of the transparent jig (401).

2. The large cylindrical battery negative current collector plate inspection apparatus according to claim 1, characterized by, The high-speed area array camera components comprise, in sequence: A high-precision 3D camera (501) installed on the ring-shaped magnetic suspension detection platform (402) and used for measuring the flatness of the negative current collector plate; A first high-speed area array camera telecentric lens (502) installed on the ring-shaped magnetic suspension detection platform (402) and used for measuring the mouth diameter and the tab roundness of the negative current collector plate; A second high-speed area array camera telecentric lens (503) installed on the ring-shaped magnetic suspension detection platform (402) and used for measuring the bottom diameter of the negative current collector plate; A third high-speed area array camera group (504), a fourth high-speed area array camera group (505), a fifth high-speed area array camera group (506) and a sixth high-speed area array camera group (507) installed on the ring-shaped magnetic suspension detection platform (402) and used for detecting the appearance defects of the negative current collector plate; A seventh high-speed area array camera (508) installed on the ring-shaped magnetic suspension detection platform (402) and used for measuring the height and the outer wall defects of the negative current collector plate.

3. The large cylindrical battery negative current collector plate inspection apparatus according to claim 2, characterized by, The third high-speed area array camera group (504), the fourth high-speed area array camera group (505), the fifth high-speed area array camera group (506) and the sixth high-speed area array camera group (507) each comprise two high-speed area array cameras symmetrically arranged at the upper and lower ends of the transparent jig (401).

4. The large cylindrical battery negative current collector plate inspection apparatus according to claim 2, characterized by, The seventh high-speed area array camera (508) is provided with three groups.

5. The large cylindrical battery negative current collector plate inspection apparatus according to claim 2, characterized by, The appearance defects include one or more of the following: crushing, scratching, dirt, deformation and yellowing due to oxidation.

6. The large cylindrical battery negative current collector plate inspection apparatus according to claim 2, characterized by, Further comprising: A roller line group (1) for transporting and storing the negative current collector plate in an insertion basket; A material taking part (2) for disassembling the insertion basket and taking out the negative current collector plate; A product adjusting part (3) for adjusting the negative current collector plate taken out by the material taking part (2) and transporting the negative current collector plate to the transparent jig (401) by a mechanical hand; A classification and storage device for storing the negative current collector plate after detection by the detection module (5).

7. The large cylindrical battery negative current collector plate inspection apparatus according to claim 6, characterized by, The product adjusting part (3) comprises a CCD positioning mechanism (302) and a variable-distance deviation rectifying mechanism (301), the CCD positioning mechanism (302) is used for monitoring the position of the negative current collector plate, and the variable-distance deviation rectifying mechanism (301) is used for adjusting the distance between two adjacent negative current collector plates.

8. The large cylindrical battery negative current collector plate inspection apparatus according to claim 6, characterized by, The classification and storage device comprises an OK product storage mechanism and an NG product storage mechanism.

9. The large cylindrical battery negative current collector plate inspection apparatus according to claim 8, characterized by, The OK product storage mechanism comprises an OK product temporary storage station (6) and an OK product tray loading mechanism (8), the OK product temporary storage station (6) is provided with an OK product temporary storage tray (601), the OK product tray loading mechanism (8) is provided with a tray for storing negative electrode current collecting plates, the OK product tray loading mechanism (8) is provided with a tray loading position (801), the OK product temporary storage station (6) is provided with a first four-axis mechanical arm (803), and the first four-axis mechanical arm (803) is used for moving the negative electrode current collecting plate on the OK product temporary storage tray (601) into the tray on the tray loading position (801). The OK product tray loading mechanism (8) is further provided with a tray loading position (802).

10. The large cylindrical battery negative current collector plate inspection apparatus according to claim 8, characterized by, The NG product storage mechanism comprises an NG product temporary storage station (7) and an NG product tray loading mechanism (9), the NG product temporary storage station (7) is provided with an NG product temporary storage tray (701), and the NG product tray loading mechanism (9) is provided with a plurality of NG suction tray loading positions (902) for placing suction trays. The NG product tray loading mechanism (9) is provided with a second four-axis mechanical arm (901), and the NG product tray loading mechanism (9) is used for moving the NG product negative electrode current collecting plate on the NG product temporary storage tray (701) onto the suction tray.

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