Multi-area parallel operation rotating disc type battery shell interior and exterior detection device and application method

Abstract

The invention discloses a multi-area parallel operation rotating disc type battery shell interior and exterior detection device. Comprising a base, an intermittent rotating device, a multi-station self-adaptive turntable device and a multi-detection-head detection device, an intermittent rotating mechanism is fixed on a workbench through a support, and a multi-station self-adaptive turntable mechanism is fixed on the intermittent rotating mechanism through a pin; and the plurality of detection areas are circumferentially distributed at corresponding positions of each station of the turntable to comprehensively detect the inside and the outside of the battery shell. According to the device, the intermittent rotating mechanism is matched with the multi-station turntable to realize parallel detection of the battery shell in different detection areas; the spoke type incomplete gear mechanism is matched with the arc-shaped clamping device, so that stable transmission of the battery shell is realized; the multi-detection-head detection mechanism is matched with the shell rotating mechanism, the shell lifting mechanism and the push rod mechanism to realize comprehensive detection of the inside and the outside of the battery shell.

Description

Technical Field

[0001] The present invention relates to the field of surface defect detection of lithium iron phosphate battery shells, and in particular to a multi-region parallel operation turntable type battery shell internal and external detection device and an application method. Background Art

[0002] As a clean and renewable energy source, lithium iron phosphate batteries are widely used in new energy vehicles, power tools, medical equipment and many other fields due to their high safety performance, long cycle life and environmental friendliness. As an important component of cylindrical lithium batteries, the shell will cause scratches, pits and other defects on the shell surface due to collision or friction during processing; poor electroplating process will also cause water spots, black spots, rust and other defects inside the shell; this defect will accelerate the corrosion of the shell by the electrolyte, affect battery performance and even cause safety hazards such as explosion. Therefore, surface defect detection of the shell is an indispensable part of the production process of cylindrical lithium iron phosphate batteries.

[0003] The existing battery shell defect detection methods mainly have the following problems:

[0004] (1) The battery shell defect detection method based on manual visual inspection relies on workers to perform defect detection inside and outside the battery shell under strong light, which is inefficient.

[0005] (2) Battery shell defect detection method based on machine vision. The existing detection device is difficult to take into account the problem of efficient detection of defects on the inside and outside of the shell (including the circumferential surface, end face, inner surface, and bottom surface).

[0006] The existence of the above problems restricts the detection efficiency of the battery shell defect detection device and cannot meet the company's requirements for logistics sorting.

[0007] In 2019, Ma Xian and others from Shenzhen Zhongyi Technology Co., Ltd. proposed a cylindrical battery appearance inspection machine with a rotating dial device (authorization announcement number: CN109530273B). This invention solves the problem of low efficiency of manual inspection of the appearance of cylindrical shells by setting a rotating dial device to drive the cylindrical battery shell to rotate 360 ​​degrees, and cooperates with the inspection device set above the rotating dial device; its disadvantage is that the shell is not inspected in different areas, and only the defect detection of the circumferential surface of the shell is realized.

[0008] In response to the above problems, in 2021, Liu Xu and others from Wuxi Dimension Investment Management Partnership proposed a visual inspection system for the appearance defects of cylindrical lithium batteries (authorization announcement number: CN113522793B). The invention uses a roller rubber wheel to drive the battery under test to rotate, and cooperates with an image acquisition device to realize the detection of defects on the circumferential surface of the battery shell; a conveyor belt with battery slots is used in conjunction with image acquisition devices on both sides to realize the detection of end face defects of the battery shell. The invention builds a multi-detection position visual imaging system to shoot the cylindrical lithium battery to be tested from different angles, and performs appearance defect inspection on each part of the cylindrical lithium battery separately; its disadvantage is that only a single shell is inspected in "series" one by one, and its detection efficiency is low.

[0009] In 2022, Zhang Lishuang and others from Sichuan Changhong New Energy Technology Co., Ltd. proposed a battery steel shell cylindrical surface defect detection device (publication number: CN115971068A). The invention sets up multiple battery shell stations on the main turntable, and uses a cylinder to absorb the shell on its side wall, while arranging a rotating mechanism to turn the shell over, and uses a multi-station visual inspection device to inspect the shell surface. Its disadvantage is that there is no clear division of the inspection device, and the control of the cylinder to absorb the shell is cumbersome and lacks adaptability, and the inspection efficiency is difficult to improve.

[0010] In summary, to solve the shortcomings of the existing technology, it is necessary to improve the shell detection mode and clamping method. Therefore, the present invention proposes a multi-area parallel operation turntable battery shell internal and external detection device and application method. A multi-station intermittent turntable mechanism is used to realize the switching of the battery shell between multiple groups of detection areas, thereby improving the shell detection efficiency; a spoke-type incomplete gear mechanism is combined with an arc-shaped clamping device to realize adaptive and stable clamping of the shell during the detection process. Summary of the invention

[0011] In view of the above-mentioned deficiencies in the prior art, the present invention proposes an all-round detection device for battery casing based on the coordination of a turntable, multiple stations and multiple detection heads.

[0012] The present invention adopts the following technical solutions:

[0013] The invention discloses an all-round detection device for battery shell based on the coordination of multi-station and multi-detection heads of a turntable, which is characterized in that it includes a base, an intermittent rotating device, a multi-station adaptive turntable device, and a multi-detection head detection device. The intermittent rotating mechanism is fixed to the workbench by a bracket, and the multi-station adaptive turntable mechanism is fixed to the intermittent rotating mechanism by pins. The multi-detection head detection mechanism has multiple detection heads distributed in a circle at the corresponding positions of each station of the turntable.

[0014] As a further limitation of the present invention, the intermittent rotation device includes: a ratchet, a connecting rod mechanism, and a limiting mechanism; a through-hole nested bearing is provided at the center of the ratchet and is installed on a shaft pre-set on the base, and the ratchet can rotate relative to the base. The ratchet is also provided with a plurality of holes distributed in a circular manner, which are connected to the holes distributed on the multi-station turntable through a pin shaft, so that the ratchet drives the multi-station turntable to rotate.

[0015] Furthermore, the connecting rod mechanism includes connecting rod one, connecting rod two, a special-shaped push rod, and a cam, one end of the cam is fixed on the base, and is provided with a through hole for embedding the motor shaft, and the other end is hinged to connecting rod one; the other end of connecting rod one is hinged to the positioning hole provided at the top of the special-shaped push rod; a positioning axis is provided at the middle position of the special-shaped push rod and is hinged to connecting rod two, and the bottom end of the push rod is contoured with the ratchet teeth for driving the ratchet to rotate; one end of connecting rod two is hinged to the special-shaped push rod, and limit blocks are provided on both sides of it for limiting the swing range of the push rod, and the other end is provided with an installation hole position for embedding the bearing installed on the shaft pre-set on the base, and is arranged coaxially with the ratchet below the ratchet.

[0016] Furthermore, the limit mechanism includes a buckle base, a limit spring, and a buckle. The buckle base is provided with a mounting hole and is fixed to the base by bolts. One end of the limit spring is fixed to the buckle base and the other end is fixed to the buckle to keep the buckle in a tensioned state. The buckle is provided with a through hole hinged to a positioning shaft pre-set on the buckle base. The bottom end of the buckle is contoured with the ratchet teeth and is always in contact with them to prevent the ratchet from rotating when the push rod swings away from the ratchet teeth.

[0017] The working process of the intermittent rotating device is as follows: the motor drives the cam on the base to rotate, the cam drives the connecting rod 1 to swing, the connecting rod 1 drives the push rod to swing, the swing range of the push rod is limited by the limit blocks on both sides of the connecting rod 2, and when the push rod swings to the bottom and contacts the ratchet gear, it is limited by the right limit block, driving the connecting rod 2 to rotate, and at the same time forcing the push rod to push the ratchet in a clockwise direction; when the ratchet rotates to a certain angle, the push rod swings to the left limit block and is limited, driving the connecting rod 2 to rotate and forcing the push rod to disengage from the ratchet. Intermittent rotation is realized in sequence, driving the turntable to rotate corresponding to each group of detection stations; in the present invention, four groups of stations are arranged along the circumference, that is, each group of stations is distributed at an interval of 90°, that is, the intermittent rotating device should drive the turntable to rotate intermittently at 90°.

[0018] As a further limitation of the present invention, the multi-station adaptive turntable device includes: a multi-station turntable, a holding device, and a spoke-type incomplete gear mechanism. A through hole is provided in the center of the multi-station turntable, which is nested in the positioning shaft of the base. It is also distributed with a plurality of positioning holes, which are fixedly connected to the ratchet in the intermittent rotation device through a pin shaft. It has twelve stations distributed in a circular manner, and three adjacent stations form a group, which are divided into a loading station, an inner surface detection station, an outer surface detection station, and an end face detection station; an annular groove is also provided on the turntable for installing a plurality of holding devices (each station corresponds to a clamping device), and the incomplete gear mechanism is nested in the positioning shaft provided on the base through the opened positioning holes. The turntable and the clamping device are driven to rotate by the intermittent rotation device, and the incomplete gear mechanism is fixedly installed with the base and remains stationary.

[0019] Furthermore, the clamping device includes: a base plate, a driving gear, a driven gear 1, a driven gear 2, a connecting rod, and a clamping claw; the driven gear 1 is an incomplete gear, which is meshed with the driven gear 2 and fixed on the base plate, and the driven gears 1 and 2 both have extension rods and are provided with positioning holes, which are hinged to the mounting holes provided on the extension rods of the clamping claws through pins, one end of the connecting rod is hinged to the mounting hole on the base plate, and the other end is hinged to the positioning hole on the clamping claw; the driving gear is meshed with the driven gear 2, and the driven gear drives the driven gear, and the relative movement of the two driven gears controls the opening and closing of the clamping claws; the clamping claws are arc-shaped clamps, and the inner diameter of a pair of clamping claws in the closed state is equal to the outer diameter of the battery shell, which will not cause damage to the surface of the battery shell, and has a limited stabilizing effect on the battery shell.

[0020] Furthermore, the spoke-type incomplete gear mechanism has an outer incomplete gear and an inner incomplete gear, the outer gear is provided with a through hole in the center, and is fixedly mounted on a positioning shaft provided on the base plate, the inner incomplete gear is fixedly mounted with the outer incomplete gear through spoke-type spokes, and is kept fixed relative to the base, the outer incomplete gear teeth are two groups distributed at 180°, the inner incomplete gear teeth are two groups distributed at 180°, and the outer incomplete gear teeth are fixedly mounted concentrically with the inner incomplete gear teeth at 90° through the spokes. The spoke-type incomplete gear mechanism teeth correspond to the four groups of stations of the multi-station turntable (i.e., the loading station, the inner surface detection station, the outer surface detection station, and the end surface detection station). The intermittent rotation mechanism driven by the motor drives the multi-station turntable and the corresponding clamping device to rotate. When the clamping device rotates to the corresponding detection station, its driving gear engages with the spoke-type incomplete gear mechanism, and the motor rotates in the same direction. If the external incomplete gear controls the clamping device to open, the internal incomplete gear controls the clamping device to close, thereby controlling the automatic opening and closing of the corresponding jaws of each group of stations.

[0021] As a further limitation of the present invention, the multi-detection head detection device includes: a base, a push rod mechanism, an integrated endoscope detection mechanism, a shell lifting mechanism, a shell rotation mechanism, a polarization imaging mechanism, and a drive system. The drive system is fixed on the base, with a motor driving the shaft, and worms are arranged at both ends of the shaft to drive the turbine. The inner hole of the turbine is provided with threads, one end is left-handed and the other end is right-handed, driving the screw rod to slide up and down to provide power for the integrated endoscope detection mechanism and the shell lifting mechanism. The shell lifting mechanism is installed and fixed on the left-handed threaded screw rod, which is equipped with a vacuum suction cup, which can lift the shell, and at the same time, the push rod mechanism pushes the camera module to obtain the bottom image of the shell. The integrated endoscope detection mechanism is installed and fixed on the right-handed threaded screw rod, and its detection module is integrated by four side mirror endoscopes and one bottom mirror endoscope, which are responsible for obtaining the inner side image and the inner bottom image of the battery shell respectively. The shell rotation mechanism is composed of a gear train and a vacuum suction cup. The motor drives the gear train to drive the battery shell on the vacuum suction cup to slowly rotate one circle to cooperate with the polarization imaging mechanism to obtain the outer surface image of the shell.

[0022] The present invention adopts the above technical solution, and compared with the prior art, the beneficial effects are as follows: First, in order to address the problem of low detection efficiency of the existing detection device, the present invention adopts a multi-station intermittent turntable mechanism to ensure the switching of the battery shell between multiple groups of detection areas, thereby realizing parallel detection of multiple battery shells between different detection areas and improving the shell detection efficiency.

[0023] Second, in response to the problem that existing detection devices are difficult to take into account the detection of the inside and outside of the battery shell, the present invention realizes comprehensive defect detection of the circumferential surface, end face, inner surface and bottom surface of the battery shell by setting up multiple groups of detection areas in conjunction with the shell rotation mechanism, shell lifting mechanism and push rod mechanism.

[0024] Third, in order to solve the problem that the battery shell is difficult to maintain stable transmission, the present invention adopts a spoke-type incomplete gear mechanism to control the opening and closing of the clamping device at the corresponding detection station through the meshing of its internal and external teeth with the arc-shaped clamping device driving gear to achieve stable transmission of the battery shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The overall structure diagram of the present invention is

[0026] Figure 2 Schematic diagram of the intermittent rotating device of the present invention

[0027] Figure 3 Schematic diagram of the multi-station tray loading device of the present invention

[0028] Figure 4 Schematic diagram of the clamping device of the present invention DETAILED DESCRIPTION

[0029] like Figure 1The overall structural schematic diagram of the present invention includes: a base 1, an intermittent rotating device 2, a multi-station turntable 3, a shell rotating mechanism 4, a driving device 5, an integrated endoscope detection mechanism 6, a push rod mechanism 7, and a shell lifting mechanism 8. The center of the intermittent rotating device 2 is provided with a through-hole nested bearing installed on a pre-set shaft of the base, the multi-station turntable 3 is fixed to the intermittent rotating device 2 through a pin shaft, the shell rotating mechanism 4, the driving device 5, the integrated endoscope detection mechanism 6, and the shell lifting mechanism 8 are all installed and fixed on the base 1, the driving device 5 provides power for the shell rotating mechanism 4 and the integrated endoscope detection mechanism 6, and the push rod mechanism 7 is installed and fixed on the multi-station turntable 3.

[0030] like Figure 2 The intermittent rotating device of the present invention is shown as comprising: ratchet 21, buckle 22, limit spring 23, buckle base 24, special-shaped push rod 25, connecting rod 26, connecting rod 1 27, cam 28, and driving motor 29. The ratchet 21 has a through hole in the center and is mounted on a pre-set shaft of the base 1. It can rotate relative to the base. The ratchet is also provided with a plurality of holes distributed in a circumferential manner, which are connected to the holes distributed on the multi-station turntable through a pin shaft, so that the ratchet drives the multi-station turntable to rotate. One end of the cam 28 is fixed on the base 1 and is provided with a through hole for embedding the motor shaft, and the other end is hinged to the connecting rod 1 27; the other end of the connecting rod 1 is hinged to the positioning hole set at the top of the special-shaped push rod 25; a positioning shaft is provided at the middle position of the special-shaped push rod and is hinged to the connecting rod 2, and the bottom end of the push rod is contoured with the ratchet teeth to push the ratchet to rotate; one end of the connecting rod 26 is hinged to the special-shaped push rod, and limited blocks are provided on both sides of it to limit the swing range of the push rod, and the other end is provided with an installation hole position for embedding the bearing installed on the pre-set shaft of the base 1, and is arranged coaxially with the ratchet below the ratchet. A mounting hole is provided on the buckle base 24, which is fixed to the base by bolts. One end of the limit spring 23 is fixed to the buckle base, and the other end is fixed to the buckle to keep the buckle in a tensioned state. A through hole is provided on the buckle and is hinged to a positioning axis pre-set on the buckle base 1. The bottom end of the buckle is contoured with the ratchet teeth and always keeps in contact with them to prevent the ratchet from rotating when the push rod swings out of the ratchet teeth.

[0031] The working principle of the intermittent rotating device is as follows: the motor drives the cam 28 on the base to rotate, the cam drives the connecting rod 1 27 to swing, the connecting rod 1 drives the special-shaped push rod 25 to swing, the swing range of the push rod is limited by the limit blocks on both sides of the connecting rod 26, and when the push rod swings to the bottom and contacts the teeth of the ratchet 21, it is limited by the right limit block, driving the connecting rod 27 to rotate, and at the same time forcing the special-shaped push rod 25 to push the ratchet in a clockwise direction; when the ratchet rotates to a certain angle, the push rod swings to the left limit block and is limited, driving the connecting rod 26 to rotate and force the push rod to disengage from the ratchet. Intermittent rotation is realized in sequence, driving the turntable to rotate corresponding to each group of detection stations; in the present invention, four groups of detection stations are arranged along the circumference, that is, each group of stations is distributed at an interval of 90°, that is, the intermittent rotating device should drive the turntable to intermittently rotate at 90°.

[0032] like Figure 3 The multi-station turntable device of the present invention is shown as comprising: a multi-station turntable 31, an arc-shaped clamping device 32, an inner-toothed incomplete gear 33, an outer-toothed incomplete gear 34, and a spoke 35. A through hole is provided at the center of the multi-station turntable 31, which is nested on the positioning shaft of the base 1. It is also provided with a plurality of positioning holes, which are fixedly connected to the ratchet 21 in the intermittent rotating device 2 through a pin shaft. It is provided with twelve stations distributed in a circular manner, and three adjacent stations form a group, which are divided into a loading station, an inner surface detection station, an outer surface detection station, and an end face detection station; an annular groove is also provided on the turntable for installing a plurality of holding devices 32 (each station corresponds to a clamping device), and the incomplete gear mechanism is nested on the positioning shaft provided on the base through the opened positioning holes. The turntable 31 is driven by the intermittent rotating device 2 to rotate the clamping device 32, and the incomplete gear mechanism is fixedly installed with the base 1 and remains stationary.

[0033] The clamping device 32 includes: a base plate 321, a driving gear 322, a driven gear 1 323, a driven gear 2 324, a connecting rod 325, and a clamping claw 326; the driven gear 1 323 is an incomplete gear, which is meshed with the driven gear 2 324 and fixed on the base plate 321, and the driven gears 1 and 2 are both provided with extension rods and positioning holes, which are hinged to the mounting holes provided on the extension rods of the clamping claw 326 through a pin shaft, one end of the connecting rod 325 is hinged to the mounting hole on the base plate 321, and the other end is hinged to the positioning hole on the clamping claw 326; the driving gear is meshed with the driven gear 2, and the driven gear drives the driven gear, and the relative movement of the two driven gears controls the opening and closing of the clamping claw; the clamping claw 326 is an arc-shaped fixture, and the inner diameter of a pair of clamping claws in the closed state is equal to the outer diameter of the battery shell, which will not cause damage to the surface of the battery shell, and has a limited stabilizing effect on the battery shell.

[0034] The spoke-type incomplete gear mechanism has an outer incomplete gear 34 and an inner incomplete gear 33. The outer gear 34 is provided with a through hole in the center and is fixedly mounted on the positioning shaft provided on the base plate 1. The inner incomplete gear 33 is fixedly mounted with the outer incomplete gear 34 through spoke-type spokes 35 and remains fixed relative to the base 1. The teeth of the outer incomplete gear 34 are divided into two groups and distributed at 180°. The teeth of the inner incomplete gear 33 are divided into two groups and distributed at 180°. The teeth of the outer incomplete gear and the teeth of the inner incomplete gear are fixedly mounted concentrically at 90° through the spokes. The teeth of the spoke-type incomplete gear mechanism correspond to the four groups of stations of the multi-station turntable (i.e., the loading station, the inner surface detection station, the outer surface detection station, and the end surface detection station). The intermittent rotating mechanism 2 is driven by a motor to drive the multi-station turntable 31 and the corresponding clamping device 32 to rotate. When the clamping device 32 rotates to the corresponding detection station, its driving gear 322 engages with the spoke-type incomplete gear mechanism, and the motor rotates in the same direction. If the external incomplete gear 34 controls the clamping device to open, the internal incomplete gear 33 controls the clamping device to close, thereby controlling the automatic opening and closing of the corresponding jaws of each group of stations.

[0035] The multi-detection head detection device includes: a base 1, a push rod mechanism 7, an integrated endoscope detection mechanism 6, a shell lifting mechanism 8, a shell rotating mechanism 4, and a drive system 5. The drive system 5 is fixed on the base 1, and the motor 53 drives the shaft 56. A worm is arranged at both ends of the shaft to drive the turbine 51 and 55. The inner hole of the turbine is provided with a thread, one end is left-handed and the other end is right-handed, which drives the screw rod 52 and 54 to slide up and down to provide power for the integrated endoscope detection mechanism 41 and the shell lifting mechanism 44. The shell lifting mechanism 8 is installed and fixed on the left-handed threaded screw rod, which has a clamping device to lift the shell, and the push rod mechanism 7 pushes the camera module to obtain the bottom image of the shell. The integrated endoscope detection mechanism 6 is installed and fixed on the right-handed threaded screw rod, and its detection module is integrated by four side mirror endoscopes and one bottom mirror endoscope, which are responsible for obtaining the inner side image and the inner bottom image of the battery shell respectively. The shell rotating mechanism 4 is composed of a gear system and a clamping device. The motor drives the gear system to drive the battery shell on the clamping device to slowly rotate one circle to cooperate with the polarization imaging mechanism to obtain the image of the outer surface of the shell.

Claims

1. A multi-zone parallel operation turntable type battery housing internal and external detection device, characterized in that: Base 1, intermittent rotating device 2, multi-station turntable 3, shell rotating mechanism 4, driving device 5, integrated endoscope detection mechanism 6, push rod mechanism 7, shell lifting mechanism 8. The center of the intermittent rotating device 2 is provided with a through-hole nested bearing installed on the pre-set shaft of the base, the multi-station turntable 3 is fixed to the intermittent rotating device 2 through a pin shaft, the shell rotating mechanism 4, the driving device 5, the integrated endoscope detection mechanism 6, and the shell lifting mechanism 8 are all installed and fixed on the base 1, the driving device 5 provides power for the shell rotating mechanism 4 and the integrated endoscope detection mechanism 6, and the push rod mechanism 7 is installed and fixed on the multi-station turntable 3.

2. The multi-zone parallel operation turntable type battery housing internal and external detection device according to claim 1, characterized in that: The intermittent rotating device 2 includes a ratchet 21, a buckle 22, a limit spring 23, a buckle base 24, a special-shaped push rod 25, a second connecting rod 26, a first connecting rod 27, a cam 28, and a driving motor 29. The ratchet 21 has a through hole in the center, which is mounted on a pre-set shaft of the base 1 and can rotate relative to the base. The ratchet is also provided with a plurality of holes distributed in a circumferential manner, which are connected to the holes distributed on the multi-station turntable through a pin shaft, so that the ratchet drives the multi-station turntable to rotate. One end of the cam 28 is fixed on the base 1 and is provided with a through hole for embedding the motor shaft, and the other end is hinged to the connecting rod 1 27; the other end of the connecting rod 1 is hinged to the positioning hole set at the top of the special-shaped push rod 25; a positioning shaft is provided at the middle position of the special-shaped push rod and is hinged to the connecting rod 2, and the bottom end of the push rod is contoured with the ratchet teeth to push the ratchet to rotate; one end of the connecting rod 26 is hinged to the special-shaped push rod, and limited blocks are provided on both sides of it to limit the swing range of the push rod, and the other end is provided with an installation hole position for embedding the bearing installed on the pre-set shaft of the base 1, and is arranged coaxially with the ratchet below the ratchet. A mounting hole is provided on the buckle base 24, which is fixed to the base by bolts. One end of the limit spring 23 is fixed to the buckle base, and the other end is fixed to the buckle to keep the buckle in a tensioned state. A through hole is provided on the buckle and is hinged to a positioning axis pre-set on the buckle base 1. The bottom end of the buckle is contoured with the ratchet teeth and always keeps in contact with them to prevent the ratchet from rotating when the push rod swings out of the ratchet teeth.

3. The intermittent rotation device 2 according to claim 2 has the following working principle: the motor drives the cam 28 on the base to rotate, the cam drives the connecting rod 1 27 to swing, the connecting rod 1 drives the special-shaped push rod 25 to swing, the swing range of the push rod is limited by the limit blocks on both sides of the connecting rod 26, and when the push rod swings to the bottom end and contacts the teeth of the ratchet 21, it is limited by the right limit block, driving the connecting rod 27 to rotate, and at the same time forcing the special-shaped push rod 25 to push the ratchet in a clockwise direction; when the ratchet rotates to a certain angle, the push rod swings to the left limit block and is limited, driving the connecting rod 26 to rotate and force the push rod to disengage from the ratchet. Intermittent rotation is realized in sequence, driving the turntable to rotate corresponding to each group of detection stations; in the present invention, four groups of detection stations are arranged along the circumference, that is, each group of stations is distributed at an interval of 90°, that is, the intermittent rotation device should drive the turntable to intermittently rotate at 90°.

4. The battery shell omnidirectional detection device based on the coordination of a turntable, multiple stations and multiple detection heads according to claim 1 is characterized in that: The multi-station turntable device 3 includes a multi-station turntable 31, an arc-shaped clamping device 32, an inner-toothed incomplete gear 33, an outer-toothed incomplete gear 34, and spokes 35. The center of the multi-station turntable 31 is provided with a through hole, which is nested in the positioning shaft of the base 1. It is also provided with a plurality of positioning holes, which are fixedly connected to the ratchet 21 in the intermittent rotating device 2 through a pin shaft. It is provided with twelve stations distributed in a circular manner, and three adjacent stations form a group, which are divided into a loading station, an inner surface detection station, an outer surface detection station, and an end face detection station; an annular groove is also provided on the turntable for installing a plurality of holding devices 32 (each station corresponds to a clamping device), and the incomplete gear mechanism is nested in the positioning shaft provided on the base through the opened positioning holes. The intermittent rotating device 2 drives the rotating disk 31 and the clamping device 32 to rotate, and the incomplete gear mechanism is fixedly installed on the base 1 and remains motionless.

5. The multi-station turntable device according to claim 4, characterized in that: The arc clamping device 32 includes a base plate 321, a driving gear 322, a driven gear 1 323, a driven gear 2 324, a connecting rod 325, and a clamping jaw 326; the driven gear 1 323 is an incomplete gear, which is meshed with the driven gear 2 324 and fixed on the base plate 321, and the driven gears 1 and 2 have extension rods and are provided with positioning holes and are hinged with the mounting holes provided on the extension rods of the clamping jaw 326 through a pin shaft, one end of the connecting rod 325 is hinged with the mounting hole on the base plate 321, and the other end is hinged with the positioning hole on the clamping jaw 326; the driving gear is meshed with the driven gear 2, and the driven gear drives the driven gear, and the relative movement of the two driven gears controls the opening and closing of the clamping jaw; the clamping jaw 326 is an arc-shaped fixture, and in the closed state, the inner diameter of a pair of clamping jaws is equal to the outer diameter of the battery shell, which will not cause damage to the surface of the battery shell and has a limited stabilizing effect on the battery shell.

6. The multi-station turntable device according to claim 4, characterized in that: The spoke-type incomplete gear mechanism has an outer incomplete gear 34 and an inner incomplete gear 33. The outer gear 34 is provided with a through hole in the center and is fixedly mounted on the positioning shaft provided on the base plate 1. The inner incomplete gear 33 is fixedly mounted with the outer incomplete gear 34 through spoke-type spokes 35 and remains fixed relative to the base 1. The teeth of the outer incomplete gear 34 are divided into two groups and distributed at 180°. The teeth of the inner incomplete gear 33 are divided into two groups and distributed at 180°. The teeth of the outer incomplete gear and the teeth of the inner incomplete gear are fixedly mounted concentrically at 90° through the spokes. The teeth of the spoke-type incomplete gear mechanism correspond to the four groups of stations of the multi-station turntable (i.e., the loading station, the inner surface detection station, the outer surface detection station, and the end surface detection station). The intermittent rotating mechanism 2 is driven by a motor to drive the multi-station turntable 31 and the corresponding clamping device 32 to rotate. When the clamping device 32 rotates to the corresponding detection station, its driving gear 322 engages with the spoke-type incomplete gear mechanism, and the motor rotates in the same direction. If the external incomplete gear 34 controls the clamping device to open, the internal incomplete gear 33 controls the clamping device to close, thereby controlling the automatic opening and closing of the corresponding jaws of each group of stations.

7. According to the multi-zone parallel operation turntable type battery housing internal and external detection device according to claim 1, it is characterized in that: The multi-detection head detection device comprises: a base 1 , a push rod mechanism 7 , an integrated endoscope detection mechanism 6 , a shell lifting mechanism 8 , a shell rotating mechanism 4 , and a driving system 5 . The driving system 5 is fixed on the base 1, and the motor 53 drives the shaft 56. A worm is provided at both ends of the shaft to drive the turbine 51 and 55. The inner hole of the turbine is provided with a thread, one end is left-handed and the other end is right-handed, driving the screw rods 52 and 54 to slide up and down to provide power for the integrated endoscope detection mechanism 41 and the shell lifting mechanism 44. The shell lifting mechanism 8 is installed and fixed on the left-handed threaded screw rod, which is equipped with a clamping device to lift the shell. At the same time, the push rod mechanism 7 pushes the camera module to obtain the bottom image of the shell. The integrated endoscope detection mechanism 6 is installed and fixed on the right-handed threaded screw rod. Its detection module is integrated by four side mirror endoscopes and one bottom mirror endoscope, which are responsible for obtaining the inner side image and the inner bottom image of the battery shell respectively. The shell rotation mechanism 4 is composed of a gear system and a clamping device. The motor drives the gear system to drive the battery shell on the clamping device to slowly rotate one circle to cooperate with the polarization imaging mechanism to obtain the outer surface image of the shell.

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