Lithium battery appearance quality detection method and lithium battery appearance quality detection equipment

Abstract

The invention discloses a lithium battery appearance quality detection method and lithium battery appearance quality detection equipment. The lithium battery appearance quality detection method comprises the steps that S1, a feeding mechanism receives feeding data information sent by a control system; s2, the carrying mechanism receives carrying data information sent by the control system; s3, the side detection mechanism receives the side detection data information sent by the control system and executes side appearance detection of the lithium battery; s4, the turntable mechanism receives the positioning data information sent by the control system; s5, the welding seam detection mechanism receives the welding seam detection data information sent by the control system and executes welding seam detection of the lithium battery; s6, the cache mechanism receives cache data information of the control system and performs positioning placement on the unqualified lithium battery; and S7, the discharging mechanism receives discharging data information sent by the control system and executes discharging of the qualified product box. Automatic feeding, carrying, appearance detection and welding seam detection of the lithium batteries and classification and discharging of qualified products and unqualified products are achieved, the automation degree of the whole process is high, and the detection efficiency is high.

Description

Technical Field

[0001] The present invention belongs to the technical field of detection equipment, and in particular relates to a lithium battery appearance quality detection method and a lithium battery appearance quality detection equipment. Background Art

[0002] After laser welding of lithium battery poles in the new energy field, the welding effect needs to be tested to see if there are any scratches, dents, or defects. The welds need to be tested to see if there are any leaks, broken welds, holes, or obvious uneven welds. There are many types of defects, so a comprehensive appearance inspection of the battery cell is required to improve the product quality of lithium micro batteries.

[0003] For lithium batteries, the outer side and the poles usually need to be visually inspected. Manual inspection is inefficient and cannot meet the needs of large-scale inspection. Summary of the invention

[0004] The purpose of the present invention is to provide a lithium battery appearance quality inspection method and a lithium battery appearance quality inspection device to solve the problems raised in the above background technology.

[0005] In view of this, the present invention provides a method for detecting the appearance quality of a lithium battery, comprising the following steps: S1, the feeding mechanism receives the feeding data information sent by the control system and executes the material box moving action along the first direction; S2, the transport mechanism receives the transport data information sent by the control system and performs a transport action along the second direction; S3, the side detection mechanism receives the side detection data information sent by the control system and performs a side appearance detection of the lithium battery; S4, the turntable mechanism receives the positioning data information sent by the control system and performs positioning and placement of qualified lithium batteries; S5. The weld detection mechanism receives the weld detection data information sent by the control system and performs weld detection of the lithium battery by rotating the lithium battery synchronously; S6, the cache mechanism receives the cache data information of the control system and performs positioning and placement of the unqualified lithium batteries; S7. The unloading mechanism receives the unloading data information sent by the control system and executes unloading of qualified material boxes.

[0006] A lithium battery appearance quality inspection device, which performs the above-mentioned lithium battery appearance quality inspection method, comprises: Machine; A feeding mechanism, disposed on the machine platform and used for conveying a material box containing lithium batteries along a first direction; A transport mechanism, disposed on the platform and reciprocating along a second direction for transporting lithium batteries, wherein the first direction is perpendicular to the second direction; A side detection mechanism is provided on the machine platform and located on one side of the feeding mechanism, and the transport mechanism can take the lithium battery from the material box of the feeding mechanism and transport it to the side detection mechanism along the second direction and rotate the lithium battery to cooperate with the side detection mechanism to perform appearance inspection on the side of the lithium battery; A turntable mechanism is rotatably disposed on the machine platform, and the turntable mechanism is used for positioning and placing lithium batteries; A weld detection mechanism is provided on the machine platform and is located outside the turntable mechanism, the weld detection mechanism is opposite to the side detection mechanism, and the weld detection mechanism is used to rotate the rotating lithium battery and perform visual detection on the weld; A buffer mechanism is arranged on the machine platform and is located on the other side of the feeding mechanism, and the transport mechanism is used to transport the inspected unqualified products to the buffer mechanism; The unloading mechanism is arranged on the machine platform and docked at the tail of the loading mechanism for receiving the material box of qualified products.

[0007] A further embodiment of the present invention is that the loading mechanism includes a loading rack, which is fixed on the machine table and also includes a first guide rail fixed on the machine table, the first guide rail is fixed on the machine table and at the lower part of the loading rack, a first material plate is slidably provided on the first guide rail along a first direction, a guide rod is provided on the first material plate, and a second material plate is slidably provided on the first guide rod, several layers of material boxes are stacked in the loading rack, the second material plate is used to receive the material box of the bottom layer in the loading rack and move it out of the loading rack, a first cylinder is provided on the first material plate, an output end of the first cylinder is fixedly connected to the bottom center of the second material plate, third material plates are provided on both sides of the middle of the loading rack, a second guide rail is provided on the third material plate, a card plate is slidably connected to the second guide rail, a second cylinder is provided on the third material plate, the output end of the second cylinder is fixedly connected to the outer side of the card plate, and the inner side of the card plate is used to resist the material box of the second to last layer so that the material box of the bottom layer falls on the second material plate.

[0008] A further implementation scheme of the present invention is that the transport mechanism includes a gantry, the gantry is fixed on the machine platform, a first support plate is provided on the gantry for sliding along the second direction, a slide rail is fixed on the first support plate, a second support plate is provided on the slide rail in the vertical direction, an adsorption machine is provided on the second support plate, the adsorption machine includes a suction nozzle capable of vacuum adsorbing the pole of the lithium battery, and the suction nozzle is rotatably connected to the adsorption machine.

[0009] A further implementation scheme of the present invention is that the side detection mechanism includes a side detection frame, which is fixed on the machine platform and outside the side of the feeding mechanism, and the side detection frame is provided with a first motor, the output end of the first motor is connected to a first screw rod, the first screw rod is transmission-connected to a first slider, a camera fixing frame is fixed on the first slider, a side camera is fixed on the camera fixing frame, and a light source assembly is further provided on the other side of the side detection frame, and the light source assembly and the side camera cooperate with the lithium battery adsorbed by the conveying assembly to perform external side quality photo inspection.

[0010] A further implementation scheme of the present invention is that the turntable mechanism includes a cam divider and a turntable, the bottom center of the turntable is connected to the cam divider for driving and rotating, and a plurality of clamps are arranged circumferentially on the top of the turntable, and the clamps are used to insert and place lithium batteries.

[0011] A further implementation scheme of the present invention is that the weld detection mechanism includes a weld detection frame and a fixed frame, and the weld detection frame and the fixed frame are both fixed on the machine platform. The machine platform is provided with a first movable component and a second movable component, the first movable component is arranged on the top of the weld detection frame, and the second movable component is movably arranged on the first movable component. A line scan camera is movably provided on the top of the second movable component, and the line scan camera is used to perform weld detection on the lithium battery on the fixture, a first positioning seat is provided on the fixed frame, a second motor is provided on the top of the first positioning seat, a second screw rod is provided in the first positioning seat, the top of the second screw rod is connected to the second motor drive, a second slider is provided on the second screw rod for transmission, a first connecting plate is fixed on the second slider, a second connecting plate is fixed on the first connecting plate, a third guide rail is provided on the second connecting plate, a third slider is slidably provided on the third guide rail, a fixed frame is fixed on the third slider, an adsorption machine is provided on the fixed frame, and a rotatable suction nozzle is provided at the bottom of the adsorption machine, and the suction nozzle is used to absorb the lithium battery and rotate.

[0012] A further implementation scheme of the present invention is that the cache mechanism includes a fourth guide rail, the fourth guide rail is fixed on the machine platform and is located outside the feeding mechanism, and a cache rack is slidably connected to the fourth guide rail, and the cache rack is used to place material boxes for inserting defective products.

[0013] A further embodiment of the present invention is that the unloading mechanism includes an unloading rack, which slides on the first guide rail and is located at the rear end of the loading rack, and the unloading rack is used to dock with a material box of qualified products conveyed by the loading mechanism.

[0014] The beneficial effects of the present invention are: First, the loading mechanism loads the material box filled with lithium batteries, and the material box at the bottom layer is transported and loaded along the first direction. The conveying mechanism is used to vacuum absorb the lithium batteries on the material box and move them to the side inspection mechanism along the second direction. The conveying mechanism rotates the lithium batteries in all directions and cooperates with the side inspection mechanism to take pictures and inspect the outer appearance quality. Unqualified products are transported to the material box of the cache mechanism, and qualified products are placed on the fixture of the turntable mechanism for positioning. The turntable mechanism rotates and cooperates with the weld inspection mechanism to take out the lithium batteries on the fixture and perform 3D line scanning to perform laser welding weld appearance inspection of the pole. Qualified products are transported back to the material box by the conveying mechanism, and unqualified products are classified into the cache mechanism. Finally, the unloading mechanism unloads the qualified products, with a high degree of automation and fast inspection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the lithium battery appearance quality inspection equipment of the present invention; Figure 2 The structure diagram of the feeding mechanism of the present invention is shown in FIG. Figure 1 ; Figure 3 The structure diagram of the feeding mechanism of the present invention is shown in FIG. Figure 2 ; Figure 4 It is a structural schematic diagram of the transport mechanism of the present invention; Figure 5 It is a structural schematic diagram of the side detection mechanism of the present invention; Figure 6 It is a structural schematic diagram of the turntable mechanism of the present invention; Figure 7 It is a structural schematic diagram of the weld detection mechanism of the present invention; Figure 8 It is a structural schematic diagram of the cache mechanism of the present invention. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0017] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0018] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0019] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0020] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples. Example 1

[0021] This embodiment provides a method for detecting the appearance quality of a lithium battery, comprising the following steps: S1, the feeding mechanism 2 receives the feeding data information sent by the control system and executes the material box moving action along the first direction; S2, the transport mechanism 3 receives the transport data information sent by the control system and performs a transport action along the second direction; S3, the side detection mechanism 4 receives the side detection data information sent by the control system and performs a side appearance detection of the lithium battery; S4, the turntable mechanism 5 receives the positioning data information sent by the control system and performs positioning and placement of the qualified lithium batteries; S5, the weld detection mechanism 6 receives the weld detection data information sent by the control system and performs weld detection of the lithium battery by rotating the lithium battery synchronously; S6, the cache mechanism 7 receives the cache data information of the control system and performs positioning and placement of the unqualified lithium batteries; S7, the unloading mechanism 8 receives the unloading data information sent by the control system, and executes the unloading of the qualified product box; thereby realizing the automatic loading, transportation, appearance inspection, weld inspection and classification and unloading of qualified and unqualified products of lithium batteries, with a high degree of automation and high inspection efficiency. Example 2

[0022] This embodiment provides a lithium battery appearance quality inspection device, which executes the lithium battery appearance quality inspection method of the above embodiment 1. The lithium battery appearance quality inspection device includes: Machine 1 provides the installation foundation for all mechanisms.

[0023] A feeding mechanism 2, disposed on the machine platform 1 and used for conveying a material box containing lithium batteries along a first direction; A transport mechanism 3, which is disposed on the platform 1 and reciprocates along a second direction for transporting lithium batteries, wherein the first direction is perpendicular to the second direction; The side detection mechanism 4 is arranged on the machine 1 and located on one side of the feeding mechanism 2. The transport mechanism 3 can take the lithium battery from the material box of the feeding mechanism 2 and transport it to the side detection mechanism 4 along the second direction and rotate the lithium battery to cooperate with the side detection mechanism 4 to perform appearance inspection on the side of the lithium battery; A turntable mechanism 5 is rotatably disposed on the machine platform 1, and the turntable mechanism 5 is used for positioning and placing lithium batteries; A weld detection mechanism 6 is provided on the machine platform 1 and is located outside the turntable mechanism 5. The weld detection mechanism 6 is opposite to the side detection mechanism 4, and is used to rotate the lithium battery on the turntable mechanism 5 and perform visual inspection on the weld; A buffer mechanism 7 is provided on the machine platform 1 and is located on the other side of the feeding mechanism 2. The transport mechanism 3 is used to transport the inspected defective products to the buffer mechanism 7; The unloading mechanism 8 is arranged on the machine platform 1 and docked at the rear of the loading mechanism 2 for receiving the material box of qualified products.

[0024] In this embodiment, specifically, the feeding mechanism 2 includes a feeding rack 2A, the feeding rack 2A is fixed on the machine table 1, and also includes a first guide rail 2B fixed on the machine table 1, the first guide rail 2B is fixed on the machine table 1 and at the lower part of the feeding rack 2A, a first material plate 2C is slidably provided along a first direction on the first guide rail 2B, a guide rod 2D is provided on the first material plate 2C, a second material plate 2E is slidably provided on the first guide rod 2D, a plurality of layers of material boxes 2F are stacked in the feeding rack 2A, the second material plate 2E is used to receive the material box 2F at the bottom layer in the feeding rack 2A and move it out of the feeding rack 2A, a first cylinder 2G is provided on the first material plate 2C, an output end of the first cylinder 2G is fixedly connected to the bottom center of the second material plate 2E, and the feeding rack 2 A third material plate 2H is provided on both sides of the middle part of A, and a second guide rail 2I is provided on the third material plate 2H. A card plate 2J is slidably connected to the second guide rail 2I, and a second cylinder 2K is provided on the third material plate 2H. The output end of the second cylinder 2K is fixedly connected to the outer side of the card plate 2J, and the inner side of the card plate 2J is used to resist the material box 2F of the second to last layer so that the material box 2F of the bottom layer falls on the second material plate 2E. When unloading, the first material plate 2C is first moved to the bottom of the loading rack 2A, and the first cylinder 2G pushes the second material plate 2E to receive the material box 2F of the bottom layer, and the second cylinder 2K then pushes the card plate 2J close to the material box 2F and clamps the two sides of the material box 2F to realize the unloading of the material box 2F of the bottom layer, and then the first material plate 2C moves out of the loading rack 2A for feeding.

[0025] Specifically, the conveying mechanism 3 includes a gantry 3A, the gantry 3A is fixed on the machine 1, a first support plate 3B is slidably provided on the gantry 3A along the second direction, a slide rail 3C is fixed on the first support plate 3B, a second support plate 3D is provided on the slide rail 3C in the vertical direction, an adsorption machine 3E is provided on the second support plate 3D, the adsorption machine 3E includes a suction nozzle 3F capable of vacuum adsorbing the pole of the lithium battery, the suction nozzle 3F is rotatably connected to the adsorption machine 3E, the first support plate 3B moves along the gantry 3A to above the material box 2F, the second support plate 3D moves downward, the suction nozzle 3F on the adsorption machine 3E simultaneously absorbs two lithium batteries and moves to the side detection mechanism 4, and the suction nozzle 3F can also drive the lithium battery to achieve all-round free rotation.

[0026] In the present embodiment, specifically, the side detection mechanism 4 includes a side detection frame 4A, the side detection frame 4A is fixed on the machine platform 1 and outside the side of the feeding mechanism 2, the side detection frame 4A is provided with a first motor 4B, the output end of the first motor 4B is connected to the first screw rod 4C, the first screw rod 4C is transmission-connected to the first slider 4D, the first slider 4D is fixed with a camera fixing frame 4E, the camera fixing frame 4E is fixed with a side camera 4F, and the other side of the side detection frame 4A is further provided with a light source component 4G, the light source component 4G and the side camera 4F cooperate with the lithium battery adsorbed by the conveying component to perform outer side quality photo detection, the first motor 4B works to drive the first screw rod 4C to rotate, and then drives the camera fixing frame 4E to approach the suction nozzle 3F, the side camera 4F cooperates with the light source component 4G to perform appearance photo detection on the outside of the lithium battery to determine qualified products and unqualified products.

[0027] Specifically, the turntable mechanism 5 includes a cam divider 5A and a turntable 5B. The bottom center of the turntable 5B is connected to the cam divider 5A and rotates. A plurality of clamps 5C are arranged circumferentially on the top of the turntable 5B. The clamps 5C are used to insert and place lithium batteries. There are four clamps 5C on the turntable 5B. The lithium batteries that have passed the outer side inspection are placed on the clamps 5C and are transferred to the weld inspection mechanism 6 through the rotation of the turntable 5B.

[0028] In this embodiment, specifically, the weld detection mechanism 6 includes a weld detection frame 6A and a fixed frame 6B, the weld detection frame 6A and the fixed frame 6B are both fixed on the machine 1, the machine 1 is provided with a first moving component and a second moving component, the first moving component is arranged on the top of the weld detection frame 6A, the second moving component is movably arranged on the first moving component, the top of the second moving component is movably provided with a line scan camera 6C, the line scan camera 6C is used to perform weld detection on the lithium battery on the fixture 5C, and the fixed frame 6B is provided with a first positioning seat 6 D, a second motor 6E is provided on the top of the first positioning seat 6D, a second screw rod 6F is provided in the first positioning seat 6D, the top of the second screw rod 6F is drivingly connected with the second motor 6E, a second slider 6G is provided on the second screw rod 6F, a first connecting plate 6H is fixed on the second slider 6G, a second connecting plate 6I is fixed on the first connecting plate 6H, a third guide rail 6J is provided on the second connecting plate 6I, a third slider 6K is slidably provided on the third guide rail 6J, a fixing frame 6B is fixed on the third slider 6K, and a fixing frame 6B is fixed on the fixing frame 6B A suction machine 3E is provided, and a rotatable suction nozzle 3F is provided at the bottom of the suction machine 3E. The suction nozzle 3F is used to suck the lithium battery and rotate. First, the second motor 6E drives the second screw rod 6F to rotate, and then drives the first connecting plate 6H and the second connecting plate 6I to move downward. Secondly, the suction nozzle 3F on the suction machine 3E sucks the lithium battery on the fixture 5C, and then drives the line scan camera 6C to move to cooperate with the suction nozzle 3F through the first moving component and the second moving component to perform appearance inspection on the pole welding weld of the lithium battery. The line scan camera 6C is a prior art means. This embodiment The example is not described in detail. After the qualified products are rotated by the turntable 5B, the conveying mechanism 3 puts them into the material box 2F again, and the unqualified products are classified into the cache mechanism 7. Among them, the first moving assembly and the second moving assembly are consistent, both of which include a second positioning seat 6L, a third motor 6M is provided on the side of the second positioning seat 6L, a third screw rod 6N is provided in the second positioning seat 6L, a fourth slider 6O is provided on the third screw rod 6N, a third connecting plate 6P is fixed on the fourth slider 6O, the second moving assembly is arranged on the third connecting plate 6P, and the first moving assembly is arranged on the weld inspection frame 6A.

[0029] The buffer mechanism 7 includes a fourth guide rail 7A, which is fixed on the machine platform 1 and located outside the feeding mechanism 2. A buffer rack 7B is slidably connected to the fourth guide rail 7A, and the buffer rack 7B is used to place a material box 2F for inserting defective products.

[0030] In addition, the unloading mechanism 8 includes a unloading rack 8A, which slides on the first guide rail 2B and is located at the rear end of the loading rack 2A. The unloading rack 8A is used to dock with the material box 2F of qualified products delivered by the loading mechanism 2, thereby realizing automatic loading, two-dimensional appearance inspection, three-dimensional line scanning inspection, classification of qualified and unqualified products, and unloading, and other fully automatic operations with high work efficiency.

[0031] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A method for detecting the appearance quality of a lithium battery, characterized in that: The following steps are involved: S1, the feeding mechanism receives the feeding data information sent by the control system and executes the material box moving action along the first direction; S2, the transport mechanism receives the transport data information sent by the control system and performs a transport action along the second direction; S3, the side detection mechanism receives the side detection data information sent by the control system and performs a side appearance detection of the lithium battery; S4, the turntable mechanism receives the positioning data information sent by the control system and performs positioning and placement of qualified lithium batteries; S5. The weld detection mechanism receives the weld detection data information sent by the control system and performs weld detection of the lithium battery by rotating the lithium battery synchronously; S6, the cache mechanism receives the cache data information of the control system and performs positioning and placement of the unqualified lithium batteries; S7. The unloading mechanism receives the unloading data information sent by the control system and executes unloading of qualified material boxes.

2. A lithium battery appearance quality inspection device, characterized in that: The lithium battery appearance quality inspection method according to claim 1 is implemented, and the lithium battery appearance quality inspection equipment comprises: Machine; A feeding mechanism, disposed on the machine platform and used for conveying a material box containing lithium batteries along a first direction; A transport mechanism, disposed on the platform and reciprocating along a second direction for transporting lithium batteries, wherein the first direction is perpendicular to the second direction; A side detection mechanism is provided on the machine platform and located on one side of the feeding mechanism, and the transport mechanism can take the lithium battery from the material box of the feeding mechanism and transport it to the side detection mechanism along the second direction and rotate the lithium battery to cooperate with the side detection mechanism to perform appearance inspection on the side of the lithium battery; A turntable mechanism is rotatably disposed on the machine platform, and the turntable mechanism is used for positioning and placing lithium batteries; A weld detection mechanism is provided on the machine platform and is located outside the turntable mechanism, the weld detection mechanism is opposite to the side detection mechanism, and the weld detection mechanism is used to rotate the rotating lithium battery and perform visual detection on the weld; A buffer mechanism is arranged on the machine platform and is located on the other side of the feeding mechanism, and the transport mechanism is used to transport the inspected unqualified products to the buffer mechanism; The unloading mechanism is arranged on the machine platform and docked at the tail of the loading mechanism for receiving the material box of qualified products.

3. A lithium battery appearance quality inspection device according to claim 2, characterized in that: The loading mechanism includes a loading rack, which is fixed on the machine platform and also includes a first guide rail fixed on the machine platform, the first guide rail is fixed on the machine platform and at the lower part of the loading rack, a first material plate is slidably provided on the first guide rail along a first direction, a guide rod is provided on the first material plate, and a second material plate is slidably provided on the first guide rod, and several layers of material boxes are stacked in the loading rack, and the second material plate is used to receive the material box of the bottom layer in the loading rack and move it out of the loading rack, a first cylinder is provided on the first material plate, and the output end of the first cylinder is fixedly connected to the bottom center of the second material plate, and third material plates are provided on both sides of the middle of the loading rack, and the third material plate is provided with a second guide rail, and a card plate is slidably connected to the second guide rail, and a second cylinder is provided on the third material plate, and the output end of the second cylinder is fixedly connected to the outer side of the card plate, and the inner side of the card plate is used to resist the material box of the second to last layer so that the material box of the bottom layer falls on the second material plate.

4. A lithium battery appearance quality inspection device according to claim 3, characterized in that: The transport mechanism includes a gantry, which is fixed on the machine platform. A first support plate is provided on the gantry for sliding along a second direction. A slide rail is fixed on the first support plate. A second support plate is provided on the slide rail in a vertical direction. An adsorption machine is provided on the second support plate. The adsorption machine includes a suction nozzle capable of vacuum adsorbing the pole of a lithium battery, and the suction nozzle is rotatably connected to the adsorption machine.

5. A lithium battery appearance quality inspection device according to claim 4, characterized in that: The side detection mechanism includes a side detection frame, which is fixed on the machine platform and outside the side of the feeding mechanism. The side detection frame is provided with a first motor, the output end of the first motor is connected to a first screw rod, the first screw rod is transmission-connected to a first slider, a camera fixing frame is fixed on the first slider, a side camera is fixed on the camera fixing frame, and a light source assembly is further provided on the other side of the side detection frame. The light source assembly and the side camera cooperate with the lithium battery adsorbed by the conveying assembly to perform external quality photo detection.

6. A lithium battery appearance quality inspection device according to claim 5, characterized in that: The turntable mechanism includes a cam divider and a turntable. The bottom center of the turntable is connected to the cam divider for driving and rotating. The top of the turntable is provided with a plurality of clamps arranged along the circumference, and the clamps are used for inserting and placing lithium batteries.

7. A lithium battery appearance quality inspection device according to claim 6, characterized in that: The weld detection mechanism comprises a weld detection frame and a fixed frame, both of which are fixed on the machine platform, a first movable assembly and a second movable assembly are provided on the machine platform, the first movable assembly is arranged on the top of the weld detection frame, the second movable assembly is movably arranged on the first movable assembly, a line scanning camera is movably provided on the top of the second movable assembly, and the line scanning camera is used to perform weld detection on the lithium battery on the fixture, a first positioning seat is provided on the fixed frame, a second motor is provided on the top of the first positioning seat, a second screw rod is provided in the first positioning seat, the top of the second screw rod is connected to the second motor drive, a second slider is provided on the second screw rod for transmission, a first connecting plate is fixed on the second slider, a second connecting plate is fixed on the first connecting plate, a third guide rail is provided on the second connecting plate, a third slider is slidably provided on the third guide rail, a fixed frame is fixed on the third slider, an adsorption machine is provided on the fixed frame, a rotatable suction nozzle is provided at the bottom of the adsorption machine, and the suction nozzle is used to adsorb the lithium battery and rotate.

8. A lithium battery appearance quality inspection device according to claim 7, characterized in that: The cache mechanism includes a fourth guide rail, which is fixed on the machine platform and located outside the feeding mechanism. A cache rack is slidably connected to the fourth guide rail, and the cache rack is used to place material boxes for inserting defective products.

9. A lithium battery appearance quality inspection device according to claim 8, characterized in that: The unloading mechanism comprises an unloading rack, which slides on the first guide rail and is located at the rear end of the loading rack. The unloading rack is used to dock with a material box of qualified products conveyed by the loading mechanism.

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