CN116148264A - A battery appearance inspection device and appearance inspection method - Google Patents

Abstract

The invention discloses battery appearance detection equipment, which comprises a clamping and positioning table, wherein a positioning jig for fixing a battery monomer is arranged on the clamping and positioning table; the end face detection device is used for detecting the first electrode end face and the second electrode end face of the battery cell; the magnetic attraction device can move up and down, and the execution end of the magnetic attraction device is used for magnetically attracting the electrode end face of the battery monomer and transferring the battery monomer, so that the end face detection device can detect the other electrode end face of the battery monomer. Meanwhile, the appearance detection method based on the battery appearance detection equipment also discloses a battery appearance detection method, and solves the problem that the existing appearance detection equipment clamps battery monomers to cause secondary damage such as abrasion, pollution, clamping injury and the like to the battery monomers.

Description

A battery appearance inspection device and appearance inspection method

technical field

The invention relates to the field of testing equipment, in particular to a battery appearance testing equipment and an appearance testing method.

Background technique

With the rapid development of digital consumer electronics products represented by smart phones and power vehicles, the demand for power batteries continues to increase, and the quality requirements of major businesses and enterprises for lithium batteries are also gradually increasing, and lithium batteries are in the actual production process. It is inevitable that there will be surface blemishes, such as scratches, pits, bumps, dirt, etc. The surface flaws of lithium batteries usually cause serious problems to the safety of lithium batteries.

At present, the lithium battery industry mainly adopts manual visual inspection to check and screen the surface defects of lithium batteries. There are problems such as misjudgment, missed judgment and low efficiency. Therefore, the industry has gradually developed appearance inspection equipment for lithium batteries. However, in the current appearance inspection equipment, clamping components (such as manipulators) are used to clamp and transport battery cells to complete the appearance defects of battery cells. Inspection, which is easy to cause wear and pinch problems on the outer surface of the battery cell.

Contents of the invention

In order to overcome at least one defect described in the above-mentioned prior art, the present invention provides a battery appearance inspection device and an appearance inspection method, which solve the problem that the existing appearance inspection equipment clamps the battery cell and causes wear and contamination to the battery cell And the problem of secondary damage such as pinch injury.

The technical scheme that the present invention adopts for solving its problem is:

A battery appearance detection device, comprising:

A clamping and positioning platform, on which a positioning jig for fixing the battery cell is arranged;

An end face detection device, the end face detection device is used to detect the first electrode end face and the second electrode end face of the battery cell;

A magnetic attraction device that can move up and down, the executive end of the magnetic attraction device is used to magnetically attract the first electrode end face of the battery cell, and transfer the battery cell, so that the end face detection device can detect the battery The second electrode end face of the monomer.

In this way, the purpose of absorbing and transferring the battery cell can be realized by using the magnetic attraction characteristic of the magnetic attraction device. Electrode end face and second electrode end face) detection provides protection, which not only effectively solves the problem of secondary damage such as wear and pinch damage caused by the existing clamping components, but also compared with the negative pressure adsorption method, not only It can effectively avoid the risk of vacuum failure caused by factors such as pit defects in the battery cell, offset during the suction process, and the positive electrode of some battery cells is curved, and ensure the stability during the suction and transfer process, thereby ensuring the battery The accuracy of the appearance defect detection of the monomer. In addition, the problem of adopting negative pressure device and making suction cups of different specifications is avoided, and the effect of simple structure, low cost and strong applicability is achieved.

Even more unexpectedly, the magnetic attraction method of the magnetic attraction device can effectively avoid the problem that part of the outer surface of the battery cell cannot be detected during the appearance defect inspection process due to the occlusion of the clamping component, and can better cooperate with the The end face detection device completes the detection of the two electrode end faces of the battery cell and the subsequent peripheral surface detection, achieving the effect of comprehensive, high-precision and automatic detection. At the same time, it also avoids the secondary pollution of the outer surface of the battery cell caused by the transportation of the battery cell through the conveying mechanism, and achieves the purpose of comprehensively protecting the battery cell from secondary damage.

Further, the magnetic attraction device includes a lifting cylinder and a magnetic attraction assembly, the magnetic attraction assembly is the execution end of the magnetic attraction device, and the magnetic attraction assembly is connected to the lifting cylinder by transmission, so that the magnetic attraction The components can move up and down toward the positioning jig.

Further, the magnetic assembly includes a telescopic cylinder and a magnetic piece, the magnetic piece is fixedly connected to the piston rod of the telescopic cylinder, and the piston rod of the telescopic cylinder can move along the moving direction of the magnetic assembly Linear reciprocating motion enables the magnetic member to magnetically attract the battery cell.

Furthermore, the magnetic attraction assembly further includes a guide, and a guide channel is provided inside the guide for precisely magnetically attracting the battery cell or detaching the magnetic member from the battery cell. The magnetic piece is slidingly fitted inside the guiding channel, and the magnetic piece can pass through the guiding channel and slide to the outside of the guiding channel.

Further, the port of the guide passage is provided with a buffer protection groove, and the buffer protection groove is connected to the guide passage, and the buffer protection groove includes a guide surface and a protection surface connected with the guide surface, and the guide The surface is used to position the battery cell, and the protective surface is used to protect the first electrode end surface of the battery cell.

Further, the telescopic cylinder includes a telescopic cylinder base and a telescopic piston rod, the telescopic piston rod is movably assembled on the telescopic cylinder base, and the telescopic piston rod is sequentially extended from the inside to the outside of the telescopic cylinder base to form a first A stroke and a second stroke, the first stroke is used to magnetically attract the battery cell, and the second stroke is used to expose the first electrode end surface of the battery cell to the buffer protection slot.

Further, the magnetic absorption assembly also includes a magnetic absorption buffer seat, the guide and the telescopic cylinder are fixedly installed on the magnetic absorption buffer seat, and the magnetic absorption buffer seat is drivingly connected to the lifting cylinder At the driving end, the magnetic buffer seat is provided with several elastic buffers, which are used to absorb the force generated during the process of magnetically attracting or detaching the battery cell, so as to protect the battery cell from damage.

Further, the battery appearance inspection device further includes a side inspection device, which is arranged on one side of the positioning jig and is used to inspect the peripheral side surface of the battery cell.

Further, the magnetic attraction device includes a diverter, and the magnetic attraction assembly is connected to the lifting cylinder through the diverter, so that the battery cell magnetically attracted to the magnetic attraction assembly can wind around the battery cell The centerline of the body makes a circular motion.

Further, the battery appearance detection device also includes an inductor and an induction element adapted to the inductor, one of the induction element and the induction element is mounted and fixed on the steering gear, and the other is fixed on the steering gear. Or installed and fixed on the magnetic attraction assembly.

Further, the battery appearance testing equipment also includes a first scanning module, the end face detection device is slidably connected to the first scanning module, and several positioning jigs slide along the end face detection device. uniformly arranged in the direction, and a magnetic attraction device is correspondingly arranged above each of the positioning jigs.

Further, the battery appearance inspection equipment also includes a second scanning module, several of the magnetic attraction devices are located on one side of the second scanning module, and the side detection device is slidably fitted on the second scanning module. Group on.

Further, the battery appearance inspection equipment also includes a first propulsion module, the first propulsion module is arranged vertically to the first scanning module, and both the clamping positioning platform and the first scanning module slide Connected to the first propulsion module.

Further, the battery appearance inspection device also includes a second propulsion module, the second propulsion module is arranged perpendicular to the second scanning module, and the second scanning module is slidably connected to the second propulsion module. Group on.

Further, the end face detection device includes an end face visual detection component, an end face height adjustment seat and an end face height adjustment device, the end face visual detection component is installed and fixed on the end face height adjustment seat through a reversing motor, and the end face height adjustment The seat is slidably connected to the end face height adjusting device.

Further, the side detection device includes a side visual detection component, a side height adjustment seat and a side height adjustment device, the side vision detection component is mounted and fixed on the side height adjustment seat, and the side height adjustment seat is slidably connected to on the side height adjustment device.

Further, several side visual detection components are arranged on the side height adjustment seat, and the distance between two adjacent side visual detection components is equal to the distance between two adjacent magnetic attraction devices .

Further, the battery appearance detection equipment also includes a steering support base and a steering motor, the steering support base is connected to the drive shaft of the steering motor, the magnetic attraction device is installed and fixed on the steering support base, and The end face detection device, the side detection device and several clamping and positioning platforms are all arranged under the steering support base.

Further, a positive electrode detection station, a side detection station, a negative electrode detection station, and a blanking station are sequentially arranged around the drive shaft below the steering support seat, and the positive electrode detection station is connected to the negative electrode detection station. Each station is equipped with the end face detection device, and the side detection station is equipped with the side detection device.

The present invention also discloses an appearance inspection method based on the above-mentioned battery appearance inspection equipment, which defines the end face of the first electrode as the positive end face and the end face of the second electrode as the negative end face, including the following steps:

STEP01B: Battery cell loading - place several battery cells on the clamping and positioning platform of the positive detection station;

STEP02B: Positive end surface inspection——The end surface inspection device of the positive electrode inspection station checks the surface appearance defects on the positive end surface of each battery cell one by one, and then each magnetic device executes the first stroke of the telescopic cylinder and magnetically attracts the The battery cells are transferred to the negative detection station through the steering motor;

STEP03B: Negative terminal surface detection—the negative terminal surface detection device of the negative electrode detection station checks the surface appearance defects of the negative terminal surface of each battery cell one by one, and then transfers it to the unloading station through the steering motor;

STEP04B: Battery cell blanking—each of the magnetic suction devices places the corresponding battery cell in the positioning fixture of the clamping and positioning table, and then blanks the battery cell.

Further, step STEP02B is replaced with step STEP020B, which is specifically: Positive terminal surface detection—the positive terminal surface detection device of the positive pole detection station performs surface appearance defects on the positive terminal surface of each battery cell one by one, and then, each magnetic attraction device Execute the first stroke of the telescopic cylinder and magnetically attract the corresponding battery cell, and move it to the side inspection station through the steering motor;

And the following steps also exist between step STEP020B and step STEP03B:

STEP025B: Surrounding surface inspection—the side inspection device checks the surface appearance defects on the peripheral surface of each battery cell one by one, and then transfers it to the negative electrode inspection station by the steering motor.

Further, in step STEP025B, before the side detection device performs surface appearance defects on the peripheral surface of each battery cell one by one, the following steps are also included:

Start the telescopic cylinder of the magnetic attraction device again to perform the second stroke of the telescopic cylinder, so that the magnetic member of the magnetic attraction assembly contacts the positive terminal surface of the battery cell and moves the battery cell, Until the positive terminal surface of the battery cell is separated from the buffer protection slot of the magnetic attraction assembly.

Further, in step STEP02B, when each magnetic attraction device magnetically attracts the corresponding battery cell, the following steps are also included:

STEP021B: The lifting cylinder of the magnetic attraction device is retracted, and the magnetic attraction assembly of the magnetic attraction device is lowered until the protective surface on the magnetic attraction assembly abuts against the positive end surface of the battery cell;

STEP022B: Start the telescopic cylinder of the magnetic attraction assembly, so that the telescopic cylinder performs the first stroke, and the magnetic part of the magnetic attraction assembly approaches and magnetically attracts the battery cell;

STEP023B: The lifting cylinder is extended to reset and lift the magnetic assembly to a specified height.

In summary, the battery appearance inspection equipment and appearance inspection method provided by the present invention have the following technical effects:

Ingeniously magnetically attracting the battery cells through the magnetic suction device not only solves the problem of secondary damage to the battery cells caused by the existing appearance inspection equipment clamping the battery cells, such as wear, contamination, and pinching. More importantly, it also better cooperates with the end face detection device to complete the detection of the two electrode end faces of the battery cell and the subsequent peripheral surface detection, so as to achieve the effect of comprehensive, high-precision and automatic detection.

Description of drawings

Fig. 1 is the overall structural diagram of a kind of battery appearance detection equipment of the present invention;

Fig. 2 is an overall distribution diagram of a battery appearance testing device of the present invention;

Fig. 3 is the first installation drawing of a kind of battery appearance detection equipment of the present invention;

Fig. 4 is a second installation drawing of a battery appearance testing device of the present invention;

Fig. 5 is a schematic structural view of an end face detection device in the present invention;

Fig. 6 is a schematic structural view of a side detection device in the present invention;

Fig. 7 is a positional diagram of the magnetic attraction device and the end face detection device in the present invention;

Fig. 8 is a schematic diagram of the assembly of the inductor and the sensing element in the present invention;

Fig. 9 is a schematic structural view of the magnetic attraction device in the present invention;

Fig. 10 is a structural schematic diagram of the magnetic attraction assembly in the present invention;

Fig. 11 is a schematic diagram of the magnetic attraction state of the magnetic attraction assembly in the present invention.

Icons: 1-Clamping and positioning platform, 11-Positioning fixture, 2-End face detection device, 21-End face visual inspection parts, 22-End face height adjustment seat, 23-End face height adjustment device, 231-End face fixing seat, 232- End surface adjustment motor, 233-end surface slide rail, 234-end surface slider, 24-reversing motor, 3-side detection device, 31-side visual detection part, 32-side height adjustment seat, 33-side height adjustment device, 331 -Side fixing seat, 332-Side adjustment motor, 333-Side slide rail, 334-Side slider, 4-Magnetic device, 41-Lift cylinder, 42-Magnet assembly, 421-Telescopic cylinder, 422-Magnetic parts, 423-guiding piece, 424-guiding channel, 425-buffer protection groove, 425a-guiding surface, 425b-protecting surface, 426-magnetic suction buffer seat, 427-elastic buffer piece, 431-movable seat, 432-guide rod, 433 -guide bearing, 434-transmission part, 44-steering gear, 5-battery unit, 61-inductor, 62-inductor, 71-first scanning module, 72-second scanning module, 73-first Propulsion module, 74-second propulsion module, 81-steering support seat, 82-steering motor, 83-clamping support table, 91-positive detection station, 92-side detection station, 93-negative detection station , 94-feeding station.

Detailed ways

For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or positional relationship. Elements must have certain orientations, be constructed and operate in certain orientations, and therefore should not be construed as limitations on the invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

The present invention aims at comprehensive and automatic detection of appearance defects of cylindrical lithium batteries, so as to eliminate scratches, pits or film damage on the surface of cylindrical lithium batteries caused by improper operation in various links of the more complex manufacturing process and other defects, thereby avoiding the appearance defects of the cylindrical lithium battery and directly affecting the welding problem of the battery pack and other safety hazards, and avoiding the secondary damage during the inspection process of the cylindrical lithium battery.

It should be noted that for the battery cell 5, that is, the cylindrical lithium battery, the comprehensive detection of its appearance defects includes the detection of the peripheral surface and the detection of the two electrode end faces. The two electrode end faces referred to here include the positive and negative sides of the battery cell 5 As for the extreme surface and the negative terminal surface, since the battery cell 5 is a cylindrical lithium battery, the positive terminal surface and the negative terminal surface are arranged opposite to each other.

first embodiment

For details, please refer to Fig. 1 and Fig. 7, the present invention discloses battery appearance detection equipment, including:

The clamping and positioning table 1 is provided with a positioning jig 11, and the positioning jig 11 is provided with a slot matching the shape and size of the battery cell 5, and the battery cell 5 is placed on the positioning jig 11 inside the slot to fix the battery cell 5, so as to facilitate the accurate surface inspection of the subsequent battery cell 5;

The end face detection device 2, the end face detection device 2 is used to detect the first electrode end face and the second electrode end face of the battery cell 5, the first electrode end face is preferably the positive end face of the battery cell 5, and the second electrode end face is the battery cell The negative end face of the body 5, of course, the first electrode end face can also be the negative end face of the battery cell 5, and the second electrode end face is the positive end face of the battery cell 5;

The magnetic attraction device 4 capable of lifting movement, the execution end of the magnetic attraction device 4 is used to magnetically attract the first electrode end face of the battery cell 5, and transfer the battery cell 5, so that the end face detection device 2 can detect the first electrode end face of the battery cell 5 Two electrode end faces.

Specifically, assuming that the battery cell 5 is plugged and placed inside the slot of the positioning jig 11, at this time, the negative terminal surface of the battery cell 5 is located inside the slot of the positioning jig 11, and the end surface detection device 2 is positioned on the battery cell 5, and detect the positive end surface of the battery cell 5. After the detection of the positive end surface of the battery cell 5 is completed, the magnetic attraction device 4 drives the execution end down to the battery cell 5, so that the magnetic field of the execution end can be magnetically attracted. The battery cell 5 , and under the action of the lifting of the actuator, the battery cell 5 can be smoothly disengaged from the slot of the positioning jig 11 until the battery cell 5 rises to a specified height above the end surface detection device 2 .

In this embodiment, using the magnetic attraction of the magnetic attraction device 4 can not only effectively avoid the secondary damage (such as pinching) to the surface of the battery cell 5 caused by the manipulator or the jaws in the process of clamping the battery cell 5 , scratches, scratches, etc.), and also avoid the problem of misjudgment of appearance defect detection caused by contamination of the surface of the battery cell 5 by the manipulator or the gripper.

More importantly, in the process of magnetically attracting the battery cell 5, the first electrode end face of the battery cell 5 magnetically attracted by the execution end of the magnetic attraction device 4 has not only completed the surface appearance defect detection, but also the rest of the battery cell 5 The surface will not be blocked at all, which is very beneficial to the scanning detection of the remaining surfaces of the battery cell 5, and the accuracy of the surface detection of the battery cell 5 can be improved on the premise of improving the detection efficiency of the surface appearance defects of the battery cell 5 the goal of.

Wherein, in order to realize the lifting movement of the above-mentioned magnetic suction device 4, specifically according to Fig. 7, Fig. 8 and Fig. 9, the magnetic suction device 4 includes a lifting cylinder 41 and a magnetic suction assembly 42, and the magnetic suction assembly 42 is a part of the magnetic suction device 4. At the execution end, the magnetic attraction assembly 42 is drivingly connected to the lifting cylinder 41 . Wherein, the lifting cylinder 41 includes a lifting cylinder base and a vertically arranged lifting piston rod. The lifting piston rod is movably assembled on the lifting cylinder base, and the lifting piston rod can perform reciprocating linear motion on the lifting cylinder base. The lift cylinder 41 is preferably an air cylinder, and may also be a hydraulic cylinder, or an electric cylinder.

As one of the preferred modes, specifically as shown in Fig. 7 and Fig. 9, the magnetic attraction device 4 also includes a movable seat 431, a guide rod 432 arranged parallel to the lifting piston rod, and a guide bearing 433 which is plugged and fitted with the guide rod 432 , then the guide rod 432 and the guide bearing 433 can form relative sliding, one end of the guide rod 432 is connected to the lifting piston rod through the transmission part 434, the other end of the guide rod 432 is fixedly connected with the movable seat 431, and the magnetic attraction assembly 42 is driven and connected in the movable On seat 431.

When the lifting cylinder seat drives the lifting piston rod to perform telescopic reciprocating motion, the guide rod 432 is synchronously reciprocating and linearly moving with the lifting piston rod under the action of the transmission member 434 . And under the restraint and guidance of the guide bearing 433, the vibration that exists in the telescopic reciprocating motion of the lifting piston rod will be effectively eliminated, thereby ensuring that the movable seat 431 can smoothly move up and down along the vertical direction, and then the transmission connection is in the vertical direction. The magnetic attraction assembly 42 on the movable seat 431 can move up and down toward the positioning jig 11 .

During the process of magnetic attraction, the lifting piston rod makes a shrinking movement, and the movable seat 431 moves down under the guidance of the guide rod 432 , and the magnetic attraction assembly 42 approaches the battery cell 5 in the positioning jig 11 . 10 and 11, the magnetic assembly 42 includes a telescopic cylinder 421 and a magnetic piece 422. The magnetic piece 422 is fixedly connected to the lifting piston rod of the telescopic cylinder 421, and the piston rod of the telescopic cylinder 421 can move along the magnetic suction line. The moving direction of the assembly 42 is linear reciprocating motion.

Among them, the telescopic cylinder 421 includes a telescopic cylinder seat and a telescopic piston rod. The telescopic piston rod is movably assembled on the telescopic cylinder seat, and the telescopic piston rod can perform reciprocating linear motion on the telescopic cylinder seat, that is, the center line of the telescopic piston rod and the lifting piston The centerlines of the rods are coincident or parallel. The lift cylinder 41 is preferably an air cylinder, and may also be a hydraulic cylinder, or an electric cylinder. The magnetic member 422 is preferably a magnet.

At this time, after the magnetic attraction assembly 42 drops to the specified height directly above the battery cell 5, the telescopic cylinder seat drives the telescopic piston rod to push the magnetic piece 422 close to the battery cell 5 until the magnetic field of the magnetic piece 422 can act on the battery cell 5 , so that the magnetic member 422 can magnetically attract the battery cell 5 .

Therefore, the magnetic attraction effect on the battery cell 5 is achieved by the cooperation of the magnetic member 422 and the telescopic cylinder 421 , and the parts are simple in structure and easy to operate. And when the magnetic part 422 magnetically attracts the battery cell 5, the magnetic field of the magnetic part 422 will continue to act on the battery cell 5 stably, then along with the movement of the magnetic attraction assembly 42, the stability of the battery cell 5 will be effectively guaranteed. , precise movement. However, when the process of surface appearance defect detection is completed, if the battery cell 5 is separated from the magnetic member 422 manually or by a robot, it will easily cause secondary damage or secondary pollution to the qualified battery cell 5 .

With regard to the above-mentioned problems, the inventor provides a preferred improvement plan, specifically as shown in Figure 7, Figure 9, Figure 10 and Figure 11, the magnetic attraction assembly 42 also includes a guide 423, and the interior of the guide 423 is set There is a guide channel 424 , the magnetic part 422 is slidably fitted inside the guide channel 424 , and the magnetic part 422 can pass through the guide channel 424 and slide to the outside of the guide channel 424 . That is, the magnetic member 422 slides along the guide channel 424 from an end of the guide channel 424 close to the telescopic cylinder 421 to an end of the guide channel 424 away from the telescopic cylinder 421 , and can extend out of the guide channel 424 .

Preferably, the shape and size of the guide channel 424 is adapted to the shape and size of the magnetic piece 422, or the size of the guide channel 424 is larger than the size of the magnetic piece 422 within the assembly tolerance range, so that the magnetic piece 422 is in the direction of the guide channel 424. During the internal sliding process, the vibration generated by the telescopic piston rod of the telescopic cylinder 421 can be effectively eliminated, which not only effectively ensures the stability of the magnetic part 422 during the sliding process, but also ensures the precise magnetic attraction of the magnetic part 422. Monomer 5 provides an effective guarantee for the subsequent accurate detection of surface appearance defects.

It should be noted that the size of the guide channel 424 should be smaller than the diameter of the battery cell 5 , then the magnetic member 422 approaches the battery cell 5 along the guide channel 424 , or slides out of the guide channel 424 to contact the battery cell 5 , can accurately magnetically attract the battery cell 5, and when the magnetic member 422 slides back to the inside of the guide channel 424, because the diameter of the battery cell 5 is larger than the diameter of the guide channel 424, it cannot enter the inside of the guide channel 424, making the magnetic Part 422 is detached from the battery cell 5, and the battery cell 5 will be placed back into the positioning fixture 11 under the action of the magnetic field of the lost magnetic part 422, which solves the problem of the magnetic field of the battery cell 5 at the end of the process of surface appearance defect detection. Part 422 is separated from the battery cell 5.

In the actual process of magnetically attracting the battery cell 5, there is an error in the positioning between the magnetic member 422 of the magnetic device 4 and the positioning jig 11, or the battery cell 5 is magnetically attracted by the magnetic member 422. Due to factors such as offset, when the battery cell 5 is magnetically attracted to the guide 423, it is inevitable that there will be a slight deviation, so that the accuracy of the ideal position when the image information is collected is reduced, thereby affecting the surface appearance of the battery cell 5. The precision and accuracy of defect detection.

In view of the above existing problems, the inventor also provides a preferred improvement scheme, specifically as shown in Figure 10 and Figure 11, the port of the guide channel 424 is provided with a buffer protection groove 425, and the buffer protection groove 425 and the guide channel 424 conduct The buffer protection groove 425 includes a guide surface 425a and a protection surface 425b connected with the guide surface 425a, wherein the protection surface 425b is the bottom of the buffer protection groove 425, and the protection surface 425b is smoothed. The diameter of the guide surface 425a is gradually reduced from the side away from the protection surface 425b toward the side close to the protection surface 425b.

Therefore, when the battery cell 5 is attached to the guide member 423 under the magnetic field of the magnetic member 422, if the battery cell 5 deviates, the edge of the first electrode end surface of the battery cell 5 will contact the guide surface. 425a, the battery cell 5 is guided by the guide surface 425a, and the centerline of the battery cell 5 coincides with the centerline of the guide channel 424, that is, the centerline of the battery cell 5 and the centerline of the magnetic member 422 coincide with each other, so as to achieve the purpose of automatic centering and correction of the battery cell 5 .

The edge of the battery cell 5 abuts against the guide surface 425a and slides along the guide surface 425a until the first electrode end surface of the battery cell 5 abuts against the protective surface 425b to complete the purpose of automatic positioning of the battery cell 5. At this time, The end face of the first electrode of the battery cell 5 is not in direct contact with the magnetic member 422, thus preventing the battery cell 5 from colliding with the magnetic member 422 under the action of a magnetic field and easily causing secondary damage to the end face of the first electrode of the battery cell 5 risks of.

When the magnetic part 422 is required to be in contact with the first electrode end surface of the battery cell 5, the magnetic part 422 is moved closer to the battery cell 5 under the action of the telescopic cylinder 421 and then magnetically attached to the battery cell 5. Therefore, the battery cell 5 Under the action of the protective groove 425 , the cushioning effect during the magnetic attraction process is achieved, and the end surface of the first electrode of the battery cell 5 is protected from secondary damage.

It should be added that under the automatic positioning and buffer protection of the buffer protection groove 425, the above-mentioned magnetic attraction assembly 42 can be lowered to the designated position directly above the battery cell 5 under the action of the lifting cylinder 41, and then the telescopic cylinder 421 is driven to Drive the magnetic piece 422 close to the buffer protection groove 425, and finally the battery cell 5 is magnetically attracted to the inside of the buffer protection groove 425 under the action of the magnetic field, and the first electrode end surface of the battery cell 5 abuts against the protection surface of the buffer protection groove 425 425b. It can also be that the above-mentioned magnetic attraction assembly 42 makes a downward movement under the action of the lifting cylinder 41 until the battery cell 5 is embedded in the buffer protection groove 425, and the first electrode end surface of the battery cell 5 abuts against the buffer protection groove The protective surface 425b of 425 drives the telescopic cylinder 421 to drive the magnetic piece 422 close to the buffer protection groove 425 to complete the action of the magnetic piece 422 magnetically attracting the battery cell 5 .

According to the process of the magnetic attraction device 4 magnetically attracting the battery cell 5, if the lift cylinder 41 directly controls the buffer protection groove 425 of the guide 423 to contact the battery cell 5, it is necessary to precisely control the height of the guide 423 to drop. Otherwise, the protective surface 425b of the guide member 423 will inevitably collide with the first electrode end surface of the battery cell 5, causing secondary damage to the battery cell 5.

Alternatively, the battery cell 5 is separated from the magnetic member 422 in a suspended state, and the battery cell 5 falls freely to the positioning jig 11 by gravity, which may also easily cause the first electrode end surface of the battery cell 5 to collide with the positioning jig 11. The impact and collision will also cause secondary damage to the battery cell 5 . Therefore, it is also necessary for the lifting cylinder 41 to control the guide member 423 to move downward until the bottom of the battery cell 5 touches the positioning jig 11 , which also requires precise debugging and control of the lifting cylinder 41 . Therefore, the difficulty of debugging and controlling the magnetic attraction device 4 is greatly increased, and it is also not conducive to the detection of surface appearance defects of the battery cells 5 of various specifications.

Specifically shown in Fig. 7, Fig. 9, Fig. 10 and Fig. 11, the magnetic absorption assembly 42 also includes a magnetic absorption buffer seat 426, and the guide piece 423 and the telescopic cylinder 421 are all fixedly installed on the magnetic absorption buffer seat 426, and the magnetic absorption buffer seat 426 is connected to the driving end of the lifting cylinder 41 through transmission, and several elastic buffers 427 are arranged on the magnetic buffer seat 426, which are used to absorb the force generated during the process of magnetic attraction or detaching the battery cell 5, so as to protect the The battery cells 5 are not damaged.

Specifically, the magnetic buffer seat 426 has a buffer upper seat and a buffer lower seat. The two ends of each elastic buffer member 427 are connected to the buffer upper seat and the buffer lower seat respectively. The guide 423 and the telescopic cylinder 421 are fixedly installed on the buffer lower seat. And the telescopic piston rod of the telescopic cylinder 421 passes through the buffer lower seat and is plugged into the guide passage 424 of the guide member 423 . The buffer upper seat is connected to the driving end of the lifting cylinder 41, and the elastic properties of the elastic buffer 427 are used to skillfully transform the rigid contact between the guide 423 and the battery cell 5 into a flexible contact, thereby effectively eliminating the need for the guide 423. The force of the impact hitting the battery cell 5 . Similarly, the rigid contact between the battery cell 5 and the positioning jig 11 is also transformed into a flexible contact, thereby effectively offsetting the force of the battery cell 5 impacting and colliding with the positioning jig 11, so as to protect the battery cell 5 unexpected effect.

Unexpectedly, through the cooperation of the buffer protection groove 425 and the elastic buffer member 427, the stroke has a double buffer protection effect on the battery cell.

It should be noted that the elastic buffer 427 is preferably a combination of a spring and a fastening connector. In addition, it can also be a combination of a fastening connector and a non-metallic material with good elasticity. The non-metallic material with good elasticity such as Silicone sleeve, rubber sleeve, etc.

In addition, it should be noted that, specifically as shown in FIG. 5 , the above-mentioned end face detection device 2 includes an end face visual detection component 21, an end face height adjustment seat 22 and an end face height adjustment device 23, wherein the end face visual detection component 21 is preferably a machine vision product, That is, the image capture device (such as a CMOS camera, a CCD camera), the end face visual inspection component 21 is installed and fixed on the end face height adjustment seat 22 through the reversing motor 24, and the end face height adjustment seat 22 is slidably connected to the end face height adjustment device 23.

Specifically, as shown in FIG. 5 , the end face height adjusting device 23 includes an end face fixing base 231, an end face adjusting motor 232, a vertical end face slide rail 233, and an end face slide block 234 slidably connected on the end face slide rail 233, wherein , the end surface slide rail 233 and the end surface adjustment motor 232 are installed and fixed on the end surface fixing seat 231, and the screw drive shaft of the end surface adjustment motor 232 is connected to the end surface height adjustment seat 22, and the end surface height adjustment seat 22 is installed and fixed on the end surface slider 234 , then the end face detection device 2 can start the end face adjustment motor 232 during the process of debugging the height focal length between the first electrode end face of the battery cell 5 to drive the screw drive shaft to rotate, thereby driving the end face height adjustment seat 22 along the The direction of the end surface sliding rail 233 is slid and fine-tuned to achieve the purpose of changing the height distance between the end surface visual detection component 21 and the first electrode end surface of the battery cell 5 .

Further, when the battery cell 5 is transferred to the top of the end face visual detection component 21 , the end face visual detection component 21 should continue to scan and detect the second electrode end face of the battery cell 5 from bottom to top. As shown in Figure 5, since the end face visual detection component 21 is installed and fixed on the drive shaft of the reversing motor 24, and the reversing motor 24 is bolted to the end face height adjustment seat 22, the reversing motor 24 can be driven to rotate a degree of a flat angle , so that the camera of the end face visual inspection component 21 is aimed at the second electrode end face of the battery cell 5 from bottom to top. Therefore, the purpose of detecting surface appearance defects on the positive terminal surface and the negative terminal surface of the battery cell 5 is effectively achieved.

In the above, it is possible to effectively perform accurate and automatic detection of surface appearance defects on the two electrode end faces of the battery cell 5 . It is the appearance defect detection of the peripheral side surface of the battery appearance inspection equipment. Specifically, as shown in FIG. The peripheral surface of the monomer 5.

Since the battery cell 5 is a cylindrical lithium battery, its peripheral surface is curved. Generally, the side detection device 3 can be controlled to move circularly at a constant speed around the magnetic member 422 of the magnetic attraction device 4 . Considering that controlling the side detection device 3 to perform circular motion will make the structure and program control more complex and other factors.

The inventor also provides a preferred solution. Specifically, as shown in FIG. 7, FIG. 8 and FIG. The battery cell 5 attracted by the magnetic attraction assembly 42 can make a circular motion around the center line of the battery cell 5 , that is, the battery cell 5 makes a circular motion relative to the side detection device 3 .

Specifically, the steering gear 44 includes a steering seat and a drive motor installed and fixed on the steering seat, the steering seat is installed and fixed on the movable seat 431, and the drive shaft of the driving motor is fixedly connected with the magnetic absorption buffer seat 426, then the driving of the steering gear 44 When the motor starts, it will drive the magnetic absorption buffer seat 426 to rotate, and then drive the guide piece 423 and the telescopic cylinder 421 installed on the magnetic absorption buffer seat 426 to rotate, thereby transferring the rotation of the steering gear 44 to the magnetic piece 422, so as to realize the magnetic attraction at the same time. The purpose of the battery cell 5 on the magnetic piece 422 is to rotate.

Further, specifically as shown in FIG. 7 , FIG. 8 and FIG. 9 , the battery appearance detection device also includes an inductor 61 and an induction element 62 adapted to the inductor 61 , the inductor 61 is installed and fixed on the steering gear 44 , The inductive element 62 is installed and fixed on the magnetic absorption buffer seat 426 of the magnetic attraction assembly 42, then when the magnetic absorption buffer seat 426 does not rotate, the inductor 61 detects the inductive element 62 and transmits the detection signal to the control system, and the control system defines At this time, the position of the magnetic buffer seat 426 is the initial position. When the magnetic buffer seat 426 rotates and the sensor 61 detects the induction element 62 again and transmits the detection signal to the control system, the control system judges that the steering gear 44 has driven the magnetic buffer seat 426 to rotate a full circle, and quickly feeds back the stop command/ The suspension command is sent to the steering gear 44, so that the steering gear 44 stops rotating, so as to realize the purpose of precisely controlling the battery cell 5 to complete the detection of the surface appearance defect on the peripheral side, avoiding the problem of repeated detection of the appearance defect on the peripheral surface of the battery cell 5, and improving the The overall detection efficiency of the battery cell 5.

It should be added that the arrangement of the inductor 61 and the inductor 62 is not limited, the inductor 61 can also be installed and fixed on the magnetic buffer seat 426 of the magnetic attraction assembly 42, and the inductor 62 is installed and fixed on the steering gear 44, it can also achieve the effect of precisely controlling the detection of the magnetic attraction component 42 and the battery cell 5 for a complete rotation, thereby ensuring the precise control of the battery cell 5 to complete the detection of peripheral surface appearance defects.

It should be noted that the telescopic piston rod extends from the inside of the telescopic cylinder seat to the outside in sequence into a first stroke and a second stroke, the first stroke is used to magnetically attract the battery cell 5, and the second stroke is used to make the battery cell 5 The end surface of the first electrode exposes the buffer protection groove 425 . That is, when the battery cell 5 is magnetically attracted, the telescopic cylinder 421 is driven to perform the first stroke, so that the magnetic member 422 can magnetically attract the battery cell 5 , and when the appearance defects of the peripheral surface of the battery cell 5 are detected, the telescopic cylinder is driven to 421 executes the second stroke, so that the first electrode end surface of the battery cell 5 is moved out of the buffer protection groove 425 under the push of the telescopic piston rod, so that the battery cell 5 is more comprehensive in the process of detecting defects on the peripheral surface appearance, and at the same time, The interference of the contour line of the buffer protection groove 425 on the detection is effectively avoided.

Preferably, as shown in FIG. 6 , the above-mentioned side detection device 3 includes a side vision detection component 31, a side height adjustment seat 32 and a side height adjustment device 33, wherein the side vision detection component 31 is preferably a machine vision product, that is, an image capture device (such as CMOS camera, CCD camera), the side vision detection part 31 is installed and fixed on the side height adjustment seat 32, and the side height adjustment seat 32 is slidably connected on the side height adjustment device 33.

Specifically, as shown in FIG. 6 , the side height adjustment device 33 includes a side fixing seat 331, a side adjustment motor 332, a vertically arranged side slide rail 333, and a side slide block 334 slidably connected to the side slide rail 333, Wherein, the side slide rail 333 and the side adjustment motor 332 are installed and fixed on the side fixing seat 331, and the screw drive shaft of the side adjustment motor 332 is connected to the side height adjustment seat 32, and the side height adjustment seat 32 is installed and fixed on the side slider 334. When the side visual detection part 31 is debugged to detect the optimum height of the side surface, the side adjustment motor 332 can be started to drive the screw drive shaft to rotate, thereby driving the side height adjustment seat 32 to slide along the direction of the side slide rail 333 The fine adjustment is to achieve the purpose of changing the position of the side visual detection component 31 in the height direction of the battery cell 5 .

Based on the above, the steps of the battery appearance inspection equipment for detecting surface appearance defects of a single battery cell 5 are as follows:

Before starting the detection of surface appearance defects, the battery cells 5 are correspondingly placed on the positioning jig 11 in advance.

STEP01A: Positive terminal surface detection - through the cooperation between the end surface height adjustment seat 22 and the end surface height adjustment device 23, the focus on the end surface visual inspection part 21 and the positive end surface of the battery cell 5 is completed, and the end surface visual inspection part is passed 21 Complete the scanning detection of the battery cell 5 .

STEP02A: Transfer the battery cell 5—the lifting cylinder 41 retracts, so that the magnetic attraction assembly 42 descends to approach the battery cell 5 until the battery cell 5 abuts against the protective surface 425b of the magnetic attraction assembly 42, and then starts the magnetic attraction The telescopic cylinder 421 of the assembly 42 makes the magnetic piece 422 of the magnetic assembly 42 approach and magnetically attract the battery cell 5 , and finally, the magnetic assembly 42 is reset and lifted to a specified height by the lifting cylinder 41 .

STEP03A: Peripheral side surface detection - through the cooperation between the side height adjustment seat 32 and the side height adjustment device 33, the optimal position adjustment of the side visual detection part 31 in the height direction of the battery cell 5 is completed, and then through the steering The cooperation between the device 44 and the side visual detection component 31 completes the scanning detection of the battery cell 5 .

STEP04A: Negative terminal surface detection - through the cooperation between the end surface height adjustment seat 22 and the end surface height adjustment device 23, the focus on the end surface visual detection part 21 and the negative terminal surface of the battery cell 5 is completed, and the end surface visual detection part 21 is completed Scanning detection of the battery cell 5.

STEP05A: Replace the battery cell 5—the lifting cylinder 41 is retracted, the magnetic assembly 42 is lowered to place the battery cell 5 back to the positioning jig 11, and then the telescopic cylinder 421 of the magnetic assembly 42 is activated, so that the magnetic assembly 42 The magnetic member 422 is away from the battery cell 5 , and the magnetic assembly 42 is reset by the lifting cylinder 41 . Finally, the battery cell 5 is replaced.

STEP06A: Repeat step STEP01A to step STEP05A in sequence until all the battery cells 5 complete the detection of surface appearance defects on the two electrode end faces.

It should be noted that during the process of step STEP06A, since the specifications of the battery cell 5 are fixed, and the focusing operation of the end face visual detection part 21 has been completed, the "positive alignment between the end face visual detection part 21 and the battery cell 5" in STEP01A Focusing on the extreme surface" and "focusing on the negative terminal surface of the end face visual detection part 21 and the battery cell 5" in STEP04A can be omitted. Similarly, after the height adjustment of the side visual detection part 31 is completed, the "side The optimal position adjustment of the visual inspection component 31 in the height direction of the battery cell 5" can be omitted.

In addition, it is not limited to the above steps, the above steps are only for reference, and the above steps can be flexibly changed or adjusted according to the actual detection needs, for example, step STEP03A can be performed simultaneously with step STEP04A to shorten the detection time, Improve detection efficiency, etc.

second embodiment

In order to improve the working efficiency of the surface appearance defect detection of the battery cell 5, based on the battery appearance inspection equipment disclosed in the first embodiment, the inventor provides a further improvement plan, specifically shown in FIG. 1 , FIG. 2 and FIG. 3 , The battery appearance testing equipment also includes a first scanning module 71, on which the end face detection device 2 is slidably connected, and several positioning jigs 11 are evenly arranged along the sliding direction of the end face detection device 2, each A magnetic attraction device 4 is correspondingly disposed above each of the positioning jigs 11 .

In this embodiment, the first scanning module 71 adopts a linear module, also known as a linear module or a linear slide table. The linear module belongs to a relatively mature conventional device in the mechanical field. Here, the specific structure of the linear module and their connections are not described in detail. Utilizing the high-precision linear motion of the linear module and the characteristics of high feed stability, it can effectively ensure that the end-face detection device 2 slides with high precision under the driving action of the first scanning module 71 and precisely conducts accurate detection of each battery cell 5 detection, so as to reduce the frequency of replacing the battery cells 5 without affecting the detection accuracy of the surface appearance defects of the first electrode end surface and the second electrode end surface of each battery cell 5, and shorten the time for multiple battery cells. The overall time of surface appearance defect detection of 5 is reduced, and the purpose of high-efficiency detection of the two electrode end faces of multiple battery cells 5 is achieved.

Further, specifically as shown in Fig. 1, Fig. 2 and Fig. 4, the battery appearance detection equipment also includes a second scanning module 72, and several magnetic attraction devices 4 are located on one side of the second scanning module 72, and the side detection The device 3 is slidingly fitted on the second scanning module 72 .

Specifically, the second scanning module 72 also adopts a linear module, so as to ensure that the side detection device 3 slides with high precision under the driving action of the second scanning module 72 and accurately detects each battery cell 5, thereby realizing Under the premise of not affecting the detection accuracy of surface appearance defects on the peripheral surface of each battery cell 5, the overall time of surface appearance defect detection of multiple battery cells 5 is further shortened, thereby realizing the detection of multiple battery cells 5 5 for the purpose of higher efficiency detection of the peripheral side surface.

In the process of actual surface appearance defect detection, because the area of the peripheral side surface of the battery cell 5 is much larger than the area of any electrode end face, therefore, the occupation time of detecting the peripheral side surface of the battery cell 5 will be much longer than The detection time of the first electrode end surface of the battery cell 5 leads to the problem that the detection time of the battery cell 5 is still long and the detection efficiency is still low.

In view of the above existing problems, the inventor provides a preferred improvement scheme. Specifically, as shown in FIG. The conveying direction of the second scanning module 72 is evenly distributed, and the moving direction of the second scanning module 72 is the sliding direction of the side visual detection part 31, which is also the arrangement direction of several magnetic suction devices 4, and the adjacent two side visual detection The distance between the components 31 is equal to the distance between two adjacent magnetic devices 4 .

At this time, the side detection device 3 realizes the synchronous detection of the peripheral surfaces of the multiple battery cells 5 through a plurality of side visual detection components 31, which greatly shortens the overall time for detection of peripheral surface appearance defects, and more unexpectedly, can also realize The purpose of coherent connection between the two electrode end face detection process of the battery cell 5 and the peripheral surface detection process.

In addition, as one of the preferred methods, specifically as shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the battery appearance inspection equipment also includes a first propulsion module 73 and a second propulsion module 74, the first propulsion module The group 73 is arranged perpendicular to the first scanning module 71, the clamping positioning table 1 and the first scanning module 71 are both slidably connected to the first pushing module 73, and the second pushing module 74 is perpendicular to the second scanning module 72 The second scanning module 72 is slidably connected to the second propulsion module 74 .

Specifically, both the first propulsion module 73 and the second propulsion module 74 are preferably linear modules. Preferably, several positioning fixtures 11 are located on one side of the first scanning module 71, and the first scanning module 71 is fixedly connected to the clamping and positioning platform 1, and the clamping and positioning platform 1 is installed and fixed on the first pushing module 73 When the first propulsion module 73 drives the execution end to slide, it will make the clamping and positioning table 1 and the first scanning module 71 slide synchronously.

At this time, the conveying directions of the first propulsion module 73 and the second propulsion module 74 are all perpendicular to the arrangement direction of several magnetic devices 4 , and then the first propulsion module 73 makes each on the clamping positioning platform 1 The positioning jig 11 can be located directly under each magnetic attraction device 4 , that is, to ensure that each magnetic attraction device 4 can precisely hold the corresponding battery cell 5 , thereby effectively ensuring the accuracy and precision of subsequent detection. Through the second propulsion module 74, the distance between the side visual detection component 31 and the battery cell 5 magnetically attracted by the magnetic attraction device 4 can be better adjusted, so that the side visual detection component 31 can be more accurately focused on the battery. The peripheral surface of the battery cell 5 ensures the detection accuracy of the appearance defect on the peripheral surface of the battery cell 5, so as to achieve the unexpected effect of high-efficiency detection and high-precision detection of the battery appearance inspection equipment.

Further, specifically as shown in FIG. 1 and FIG. 2 , the battery appearance testing device also includes a steering support base 81 and a steering motor 82. The steering motor 82 is preferably located at the center of the steering support base 81, and the steering support base 81 is drive-connected to the On the drive shaft of the steering motor 82, the magnetic attraction device 4 is installed and fixed on the steering support base 81, and the end face detection device 2, the side detection device 3 and the four clamping and positioning platforms 1 are all arranged under the steering support base 81.

Among them, the four clamping and positioning stations 1 are evenly distributed around the drive shaft of the steering motor 82, but it should be noted that they are not limited to four clamping and positioning stations 1, and can also be two clamping and positioning stations 1. , three clamping and positioning tables 1, etc., can be configured in an adaptive quantity according to design requirements and other factors. Simultaneously, some positioning jigs 11 on each clamping and positioning platform 1 are all correspondingly equipped with some magnetic suction devices 4, and some magnetic suction devices 4 are evenly distributed with the drive shaft of the steering motor 82 as the center, and each magnetic suction device 4 are corresponding to each positioning jig 11.

It should be noted that each clamping and positioning platform 1 is installed on the clamping support platform 83 through the first propulsion module 73, and the correspondence between each magnetic attraction device 4 and each positioning jig 11 may be the same number The relative correspondence below means that the clamping and positioning table 1 does not move, and the steering support base 81 rotates under the action of the steering motor 82. At this time, the number of positioning fixtures 11 provided on each clamping and positioning table 1 Same, when each magnetic attraction device 4 rotates with the steering support base 81 and stays directly above any clamping and positioning platform 1 , there is a positioning jig 11 on the clamping and positioning platform 1 to match the magnetic attraction device 4 . Or it is an absolute correspondence under the situation that the position is constant, that is, the clamping positioning table 1 and the steering support base 81 are all rotated synchronously under the action of the steering motor 82. The magnetically attracted battery cell 5 will be put back into the original positioning jig 11 after the detection is completed.

Preferably, specifically as shown in FIG. 2 , a positive electrode detection station 91, a side detection station 92, a negative electrode detection station 93, and a blanking station 94 are successively arranged around the drive shaft below the steering support base 81. Both the position 91 and the negative electrode detection station 93 are equipped with an end face detection device 2 , and the side detection station 92 is equipped with a side detection device 3 .

Specifically, the battery cell 5 to be tested is loaded from the positive electrode inspection station 91 , and the appearance defect inspection of the positive end surface of the battery cell 5 is completed by the end face inspection device 2 on the positive electrode inspection station 91 . The battery cell 5 that has completed the detection of the positive terminal surface is moved to the side detection station 92 under the cooperation of the magnetic attraction device 4 and the steering motor 82. At this time, the battery cell 5 is completed by the side detection device 3 on the side detection station 92. Inspection of appearance defects on the peripheral side surface of the battery cell 5 . The battery cell 5 that has completed the peripheral surface detection is transferred to the negative electrode detection station 93 again under the cooperation of the magnetic attraction device 4 and the steering motor 82, and the battery cell 5 passes through the end face detection device 2 on the negative electrode detection station 93 to complete the battery. The appearance defect detection of the negative end surface of the cell 5, and finally, the battery cell 5 that has completed the appearance defect detection of the negative end surface is transferred to the unloading station 94 for unloading through the cooperation of the magnetic suction device 4 and the steering motor 82, and the battery cell 5 is completed. Comprehensive and automated detection of appearance defects of monomer 5.

Unexpectedly, during the loading of the positive electrode detection station 91 and the detection of the positive end surface, the battery appearance inspection equipment also simultaneously performs the detection of the peripheral surface of the side detection station 92, the detection of the negative end surface of the negative electrode detection station 93, And the blanking of the battery cell 5 at the blanking station 94, that is, to achieve the efficient detection effect of the battery appearance inspection equipment without stopping the machine, and more importantly, to maximize the use of the peripheral surface detection time, that is, the peripheral surface inspection The time utilization rate is maximized, so as to achieve the purpose of more efficient and automatic detection of surface appearance defects of a large number of battery cells 5 .

Based on the above, the end face of the first electrode is defined as the positive end face, and the end face of the second electrode is the negative end face. The steps of the battery appearance inspection equipment for detecting surface appearance defects of a large number of battery cells 5 are as follows:

STEP01B: Loading battery cells 5—place several battery cells 5 on the clamping and positioning platform 1 of the positive electrode detection station 91, specifically, each battery cell 5 is correspondingly placed on the clamping and positioning platform 1 Positioning jig 11;

STEP02B: Positive terminal surface detection—the positive terminal surface detection device 2 of the positive terminal detection station 91 performs surface appearance defects on the positive terminal surface of each battery cell 5 one by one, and then each magnetic attraction device 4 performs the first operation of the telescopic cylinder 421 Stroke and magnetically attract the corresponding battery cell 5, and transfer it to the negative pole detection station 93 through the steering motor 82;

Specifically, start the first scanning module 71 of the positive detection station 91, and drive the end face detection device 2 of the positive detection station 91 to slide from one end of the first scanning module 71 along the conveying direction of the first scanning module 71 to the other end of the first scanning module 71, and the end face detection device 2 sequentially performs surface appearance defects on the positive end face of each battery cell 5, and then, the end face detection device 2 acts on the first scanning module 71 down to reset. Simultaneously, the lifting cylinder 41 of the magnetic attraction device 4 retracts, so that the magnetic attraction assembly 42 of the magnetic attraction device 4 descends to approach the battery cell 5, and then starts the telescopic cylinder 421 of the magnetic attraction assembly 42, so that the telescopic cylinder 421 performs the first step. One stroke, and the magnetic part 422 of the magnetic attraction assembly 42 is close to and magnetically attracts the battery cell 5, then, the magnetic attraction assembly 42 is reset and lifted to a specified height by the lifting cylinder 41, and the battery cell 5 is separated from the positioning fixture 11, and finally , under the action of the steering motor 82, each magnetic attraction device 4 and each battery cell 5 are moved to the negative electrode detection station 93 together.

STEP03B: Negative terminal surface inspection——the end surface detection device 2 of the negative electrode detection station 93 checks the surface appearance defects on the negative terminal surface of each battery cell 5 one by one, and then transfers it to the unloading station 94 through the steering motor 82 ;

Specifically, start the first scanning module 71 of the negative electrode detection station 93, and drive the end face detection device 2 of the negative electrode detection station 93 to slide from one end of the first scanning module 71 along the conveying direction of the first scanning module 71 to the other end of the first scanning module 71, and the end face detection device 2 sequentially performs surface appearance defects on the positive end face of each battery cell 5, and then, the end face detection device 2 acts on the first scanning module 71 down to reset. At the same time, under the action of the steering motor 82 , each magnetic device 4 and each battery cell 5 are transferred to the unloading station 94 again.

STEP04B: Blanking of the battery cells 5——each of the magnetic devices 4 places the corresponding battery cells 5 in the positioning jig 11 of the clamping and positioning table 1 , and then the battery cells 5 are unloaded.

Specifically, the lifting cylinder 41 of the magnetic attraction device 4 is retracted, and the magnetic attraction assembly 42 of the magnetic attraction device 4 is lowered to place the battery cell 5 back to the positioning jig 11, and then the telescopic cylinder 421 of the magnetic attraction assembly 42 is started, so that The magnetic piece 422 of the magnetic assembly 42 is away from the battery cell 5 , and the magnetic assembly 42 is reset by the lifting cylinder 41 , and finally, the battery cell 5 in the positioning jig 11 is unloaded.

In order to be able to fully detect the surface of the battery cell 5, the above step STEP02B is replaced by step STEP020B, specifically: the end surface detection device 2 of the positive electrode detection station 91 performs surface appearance on the positive end surface of each battery cell 5 one by one. Defects, then, each magnetic attraction device 4 performs the first stroke of the telescopic cylinder 421 and magnetically attracts the corresponding battery cell 5, and is transferred to the side inspection station 92 by the steering motor 82;

And the following steps also exist between step STEP021B and step STEP03B:

STEP025B: Surrounding surface inspection—the side inspection device 3 checks the surface appearance defects on the peripheral surface of each battery cell 5 one by one, and then transfers it to the negative electrode inspection station 93 by the steering motor 82 ;

Specifically, start the second scanning module 72 of the side detection station 92, and drive the side detection device 3 of the side detection station 92 from one end of the second scanning module 72 along the conveying direction of the second scanning module 72 Slide to the other end of the second scanning module 72, and the side inspection device 3 sequentially performs surface appearance defects on the peripheral side surface of each battery cell 5, and then, the end surface inspection device 2 in the first scanning module 71 Reset under action. At the same time, under the action of the steering motor 82 , each magnetic attraction device 4 and each battery cell 5 are transferred to the negative electrode detection station 93 again.

It should be noted that in step STEP02B or step STEP020B, the magnetic assembly 42 descends until the end of the battery cell 5 provided with the positive end surface is located inside the buffer protection groove 425, and the protective surface 425b on the magnetic assembly 42 abuts against Contacting the positive terminal surface of the battery cell 5 avoids the risk of secondary damage caused by the positive terminal surface of the battery cell 5 colliding with the magnetic member 422 under the action of the magnetic field.

In addition, it should be added that in step STEP025B, before the side detection device 3 performs surface appearance defects on the peripheral surface of each battery cell 5 one by one, the following steps are also included:

Start the telescopic cylinder 421 of the magnetic suction device 4 again to perform the second stroke of the telescopic cylinder 421, so that the magnetic member 422 of the magnetic suction assembly 42 contacts the positive end surface of the battery cell 5, and moves the battery cell 5 until the battery cell The positive end surface of the body 5 is separated from the buffer protection groove 425 of the magnetic attraction assembly 42, thereby effectively ensuring that the peripheral surface of the battery cell 5 is completely displayed during the detection of peripheral surface appearance defects, and further ensuring the peripheral surface of the battery cell 5. Precision and accuracy of surface appearance defect detection.

More unexpectedly, it can effectively eliminate redundant contour lines in the detection of peripheral surface appearance defects, such as the contour lines of the groove bottom in the buffer protection groove 425 and the contour lines of the notch, which is more convenient for the inspector to analyze and judge. Therefore, the efficiency of detecting the appearance defects on the peripheral surface is further improved.

It should be noted that, according to actual detection needs, the above-mentioned surface appearance defect detection steps can be adjusted adaptively, and cannot be limited to the above-mentioned surface appearance defect detection steps. For example, step STEP02B can be interchanged with step STEP04B, so as to first detect the negative terminal surface and then detect the positive terminal surface.

The technical means disclosed in the solutions of the present invention are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the principle of the present invention, and these improvements and modifications are also considered as the protection scope of the present invention.

Claims (23)

1. A battery appearance detection apparatus, characterized by comprising:

the clamping and positioning table (1), wherein the clamping and positioning table (1) is provided with a positioning jig (11) for fixing the battery monomer (5);

the end face detection device (2) is used for detecting the first electrode end face and the second electrode end face of the battery cell (5);

the magnetic attraction device (4) can move up and down, and the execution end of the magnetic attraction device (4) is used for magnetically attracting the first electrode end face of the battery unit (5) and transferring the battery unit (5), so that the end face detection device (2) can detect the second electrode end face of the battery unit (5).

2. The battery appearance detection apparatus according to claim 1, wherein: the magnetic attraction device (4) comprises a lifting cylinder (41) and a magnetic attraction component (42), the magnetic attraction component (42) is an execution end of the magnetic attraction device (4), and the magnetic attraction component (42) is in transmission connection with the lifting cylinder (41) so that the magnetic attraction component (42) can move up and down towards the positioning jig (11).

3. The battery appearance detection apparatus according to claim 2, wherein: the magnetic component (42) comprises a telescopic cylinder (421) and a magnetic component (422), the magnetic component (422) is fixedly connected to a piston rod of the telescopic cylinder (421), and the piston rod of the telescopic cylinder (421) can linearly reciprocate along the movement direction of the magnetic component (42), so that the magnetic component (422) can magnetically attract the battery unit (5).

4. The battery appearance detection apparatus according to claim 3, wherein: the magnetic component (42) further comprises a guide piece (423), a guide channel (424) is arranged in the guide piece (423) and used for precisely magnetically attracting the battery unit (5) or enabling the magnetic piece (422) to be detached from the battery unit (5), the magnetic piece (422) is in sliding fit with the inside of the guide channel (424), and the magnetic piece (422) can penetrate through the guide channel (424) and slide to the outside of the guide channel (424).

5. The battery appearance detection apparatus according to claim 4, wherein: the port of guide channel (424) is provided with buffering protection groove (425), buffering protection groove (425) with guide channel (424) switches on, buffering protection groove (425) include guide face (425 a) and with guard surface (425 b) that guide face (425 a) links up, guide face (425 a) are used for the location battery monomer (5), guard surface (425 b) are used for protecting the first electrode terminal surface of battery monomer (5).

6. The battery appearance detection apparatus according to claim 5, wherein: the telescopic cylinder (421) comprises a telescopic cylinder seat and a telescopic piston rod, the telescopic piston rod is movably assembled on the telescopic cylinder seat, the telescopic piston rod sequentially stretches from the inside of the telescopic cylinder seat to the outside to form a first stroke and a second stroke, the first stroke is used for magnetically attracting the battery cell (5), and the second stroke is used for enabling the first electrode end face of the battery cell (5) to be exposed out of the buffer protection groove (425).

7. The battery appearance detection apparatus according to claim 4, wherein: the magnetic absorption assembly is characterized in that the magnetic absorption assembly (42) further comprises a magnetic absorption buffer seat (426), the guide piece (423) and the telescopic cylinder (421) are fixedly installed on the magnetic absorption buffer seat (426), the magnetic absorption buffer seat (426) is in transmission connection with the driving end of the lifting cylinder (41), and a plurality of elastic buffer pieces (427) are arranged on the magnetic absorption buffer seat (426) and are used for absorbing acting force generated in the process of magnetically absorbing or detaching the battery monomer (5) so as to protect the battery monomer (5) from being damaged.

8. The battery appearance detection apparatus according to any one of claims 2 to 7, characterized in that: the battery cell positioning device further comprises a side surface detection device (3), wherein the side surface detection device (3) is arranged on one side of the positioning jig (11) and is used for detecting the peripheral side surface of the battery cell (5).

9. The battery appearance detection apparatus according to claim 8, wherein: the magnetic attraction device (4) comprises a steering gear (44), and the magnetic attraction component (42) is connected with the lifting cylinder (41) through the steering gear (44), so that the battery unit (5) magnetically attracted on the magnetic attraction component (42) can do circular motion around the central line of the battery unit (5).

10. The battery appearance detection apparatus according to claim 9, wherein: the steering device further comprises an inductor (61) and an inductor piece (62) matched with the inductor (61), wherein one of the inductor (61) and the inductor piece (62) is fixedly arranged on the steering device (44), and the other is fixedly arranged on the magnetic component (42).

11. The battery appearance detection apparatus according to claim 8, wherein: the device is characterized by further comprising a first scanning module (71), wherein the end face detection device (2) is connected to the first scanning module (71) in a sliding mode, a plurality of positioning jigs (11) are uniformly arranged along the sliding direction of the end face detection device (2), and one magnetic attraction device (4) is correspondingly arranged above each positioning jig (11).

12. The battery appearance detection apparatus according to claim 10, wherein: the device also comprises a second scanning module (72), wherein a plurality of magnetic attraction devices (4) are all positioned on one side of the second scanning module (72), and the side surface detection device (3) is in sliding fit with the second scanning module (72).

13. The battery appearance detection apparatus according to claim 11, wherein: the device further comprises a first pushing module (73), wherein the first pushing module (73) is perpendicular to the first scanning module (71), and the clamping positioning table (1) and the first scanning module (71) are both connected to the first pushing module (73) in a sliding mode.

14. The battery appearance detection apparatus according to claim 12, wherein: the scanning device further comprises a second pushing module (74), the second pushing module (74) is perpendicular to the second scanning module (72), and the second scanning module (72) is connected to the second pushing module (74) in a sliding mode.

15. The battery appearance detection apparatus according to claim 8, wherein: the end face detection device (2) comprises an end face visual detection component (21), an end face height adjustment seat (22) and an end face height adjustment device (23), wherein the end face visual detection component (21) is fixedly installed on the end face height adjustment seat (22) through a reversing motor (24), and the end face height adjustment seat (22) is slidably connected to the end face height adjustment device (23).

16. The battery appearance detection apparatus according to claim 11, wherein: the side detection device (3) comprises a side visual detection part (31), a side height adjustment seat (32) and a side height adjustment device (33), wherein the side visual detection part (31) is fixedly arranged on the side height adjustment seat (32), and the side height adjustment seat (32) is slidably connected to the side height adjustment device (33).

17. The battery appearance detection apparatus according to claim 16, wherein: the side surface height adjusting seat (32) is provided with a plurality of side surface visual detection components (31), and the distance between two adjacent side surface visual detection components (31) is equal to the distance between two adjacent magnetic attraction devices (4).

18. The battery appearance detection apparatus according to any one of claims 9 to 17, wherein: the magnetic type steering device is characterized by further comprising a steering supporting seat (81) and a steering motor (82), wherein the steering supporting seat (81) is in transmission connection with a driving shaft of the steering motor (82), the magnetic attraction device (4) is fixedly installed on the steering supporting seat (81), and the end face detection device (2), the side face detection device (3) and the clamping and positioning tables (1) are all arranged below the steering supporting seat (81).

19. The battery appearance detection apparatus according to claim 18, wherein: the lower part of the steering support seat (81) is provided with a positive electrode detection station (91), a side surface detection station (92), a negative electrode detection station (93) and a blanking station (94) in sequence around the driving shaft, the positive electrode detection station (91) and the negative electrode detection station (93) are both provided with an end surface detection device (2), and the side surface detection station (92) is provided with a side surface detection device (3).

20. A visual inspection method, based on the battery visual inspection apparatus of any one of claims 1 to 19, defining a first electrode end face as a positive electrode end face and a second electrode end face as a negative electrode end face, comprising the steps of:

STEP01B: feeding the battery cells (5), namely correspondingly placing a plurality of battery cells (5) on a clamping and positioning table (1) of a positive electrode detection station (91);

STEP02B: positive end face detection, namely, an end face detection device (2) of a positive detection station (91) performs surface appearance defects on the positive end face of each battery cell (5) one by one, and then each magnetic attraction device (4) performs a first stroke of a telescopic cylinder (421) and magnetically attracts the corresponding battery cell (5) and transfers the battery cell to a negative detection station (93) through a steering motor (82);

STEP03B: the negative end face detection, namely, the end face detection device (2) of the negative detection station (93) performs surface appearance defects on the negative end face of each battery cell (5) one by one, and then, the negative end face is transferred to the blanking station (94) through the steering motor (82);

STEP04B: and (3) blanking the battery cells (5), wherein each magnetic attraction device (4) is used for placing the corresponding battery cell (5) in a positioning jig (11) of the clamping and positioning table (1), and then, blanking the battery cell (5).

21. The appearance inspection method of claim 20, wherein: STEP02B is replaced by STEP020B, specifically: positive end face detection, namely, an end face detection device (2) of a positive detection station (91) performs surface appearance defects on the positive end face of each battery cell (5) one by one, and then each magnetic attraction device (4) performs a first stroke of a telescopic cylinder (421) and magnetically attracts the corresponding battery cell (5) and transfers the battery cell to a side detection station (92) through a steering motor (82);

and there are also the following STEPs between STEP020B and STEP03B:

STEP025B: peripheral side surface detection-the side surface detection device (3) performs surface appearance defects on the peripheral side surface of each battery cell (5) one by one, and then, the battery cells are transferred to the negative electrode detection station (93) through the steering motor (82).

22. The appearance inspection method of claim 21, wherein: in STEP025B, before the side surface detection device (3) performs surface appearance defects on the peripheral side surface of each battery cell (5) one by one, the method further comprises the following STEPs:

and starting the telescopic cylinder (421) of the magnetic attraction device (4) again to execute a second stroke of the telescopic cylinder (421), so that the magnetic piece (422) of the magnetic attraction assembly (42) contacts the positive end face of the battery cell (5), and moving the battery cell (5) until the positive end face of the battery cell (5) is separated from the buffer protection groove (425) of the magnetic attraction assembly (42).

23. The appearance inspection method of claim 20, wherein: in STEP02B, when each magnetic attraction device (4) magnetically attracts the corresponding battery cell (5), the method further comprises the following STEPs:

STEP021B: the lifting cylinder (41) of the magnetic attraction device (4) is retracted, so that the magnetic attraction component (42) of the magnetic attraction device (4) is lowered until the protection surface (425 b) on the magnetic attraction component (42) is abutted against the positive end surface of the battery cell (5);

STEP022B: starting a telescopic cylinder (421) of the magnetic component (42) to enable the telescopic cylinder (421) to execute the first stroke, and enabling a magnetic piece (422) of the magnetic component (42) to approach to and magnetically attract the battery unit (5);

STEP023B: the lifting cylinder (41) stretches to enable the magnetic attraction assembly (42) to be reset and lifted to a specified height.

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