KR102556505B1 - Secondary battery marking apparatus and secondary battery marking method using the same - Google Patents

Abstract

Disclosed is a method for marking a cylindrical battery using the marking device for a cylindrical battery of the present invention. A marking device for a cylindrical battery includes a frame, a carrier transport wheel rotatably installed on the frame, transported along a supply-side guide rail, and having a first support groove formed on an outer circumferential surface to transport the cylindrical battery supported by the carrier at predetermined intervals. And, a driving unit installed on the frame to rotate the carrier transport wheel, and a semicircular carrier transport guide formed along an outer circumferential surface of the carrier transport wheel while being spaced apart from the carrier transport wheel by a predetermined distance;
A cylindrical battery installed adjacent to the carrier transport wheel and supported by a carrier supplied by a guide rail is supplied to the carrier guide, and a second support groove is provided on the outer circumferential surface at the same pitch as the first support groove. A carrier transport wheel and a discharge carrier wheel installed on a side corresponding to the supply carrier transport wheel to discharge a cylindrical battery discharged by the carrier transport wheel to a guide rail on the discharge side and having a third support groove formed on the outer circumferential surface thereof. It has a cylindrical battery cylindrical battery cylindrical battery cell unit installed on the frame and moved along the carrier guide, and installed on the frame to be spaced apart from the marking unit by a predetermined distance and marked by the marking unit A marking inspection unit for detecting the printing state of the mark is provided.

Description

Cylindrical battery marking device and cylindrical battery marking method using the same. {Secondary battery marking apparatus and secondary battery marking method using the same}

The present invention relates to a marking device for a cylindrical battery and a method for marking a cylindrical battery using the same, and more particularly, to a marking device for a cylindrical battery capable of marking the history of a cylindrical battery and a method for marking a cylindrical battery using the same.

In general, as demand for portable electronic products such as notebook computers, camcorders, and mobile phones rapidly increases, and development of hybrid vehicles, electric vehicles, energy storage batteries, robots, and satellites is in full swing, repetitive charging and discharging is possible. Research on high-performance secondary batteries is being actively conducted.

Among the currently commercialized secondary batteries, lithium secondary batteries are in the limelight due to their advantages of free charge/discharge, very low self-discharge rate, and high energy density because they have almost no memory effect compared to nickel-based secondary batteries.

A low-capacity battery in which one lithium secondary battery is packaged in a pack form is used in portable electronic products, and a module-type large-capacity battery in which dozens of lithium secondary batteries are connected is widely used as a power source for driving motors such as hybrid vehicles.

In secondary batteries, active materials are applied to the surface of electrode plates, which are current collectors, to form positive and negative electrodes, and an electrode assembly is made with a separator, a separator, interposed therebetween. It is manufactured through the process of sealing and storing in a battery case of.
In addition, since there is a risk of overcharging, overcurrent, and other physical external shocks such as heat generation and explosion, a safety device that can effectively control abnormal conditions such as overcharging and overcurrent is mounted.

Since secondary batteries are devices based on electrochemical reactions, they are inevitably sensitive to environmental factors, and are manufactured through a series of processes in which small parts are delicately mounted and connected in a limited space, resulting in errors in some devices and the work of some workers. Product quality may also deteriorate due to immaturity. Moreover, in the process of manufacturing a secondary battery by a mass production system, serious defects may be caused by small defects in the process.

Accordingly, secondary batteries must be closely inspected at the end of each manufacturing process step and/or after manufacturing a finished product. This inspection is one of the most important things in the production process of a secondary battery, and is important in terms of quality control to check whether desired performance and safety are provided. Here, the quality control is to determine whether the secondary battery properly has charging/discharging performance, to produce good products, and to sort out defective products. A high-quality secondary battery can be produced by well performing such quality control. If a defect occurs during manufacturing, the defective secondary battery is investigated to find out the cause, or if the secondary battery can be reproduced, rework is performed. It is difficult to track whether there is rework or not on a secondary battery basis.

Therefore, in order to solve the above problems, a system capable of tracking secondary batteries in secondary battery assembly lines and manufacturing processes is being built.

Republic of Korea Patent Registration No. 10-1731983 discloses a marking device for displaying the history of a secondary battery. The posted marking device marks the secondary battery for the purpose of classifying whether or not it is defective at each process step of the secondary battery, whether or not rework is required, and samples by lot or by condition, so that the work history is identified on a secondary battery basis, and the display is based on a transfer method or a spray method by ink contact, and the color type of the ink is varied and displayed separately for each process step.

In addition, Korean Patent Publication No. 2018-0047084 discloses a method for manufacturing a battery cell by marking reference points, and Korean Patent Publication No. 2018-0054326 discloses a marking device for a secondary battery case.

The posted marking device cannot accurately detect the standard state of the secondary battery, cannot improve productivity through lot marking and history marking, and it is not easy to manage the history of the marking state.

Republic of Korea Patent No. 10-1731983 Korean Patent Publication No. 2018-0047084 Korean Patent Publication No. 2018-0054326

The present invention is to solve the above problems, and to provide a marking device for a cylindrical battery and a method for marking a cylindrical battery using the same, which can improve productivity by smoothly performing marking of the cylindrical battery and inspection of the marking state. is in providing

Another object of the present invention is to manage the production history of cylindrical batteries produced by the marking device for cylindrical batteries by providing production history information on the marking device for cylindrical batteries to the main server that manages and controls the entire process of producing cylindrical batteries It is to provide a marking device for a cylindrical battery and a method for marking a cylindrical battery using the same.

Another object of the present invention is to provide a cylindrical battery marking device capable of smoothly performing lot marking and history marking on the outer circumferential surface of the cylindrical battery using the marking device, and a cylindrical battery marking method using the same.

A cylindrical battery marking device according to the present invention for achieving the above object has a frame and a guide rail having a predetermined radius of curvature on the frame and carrying a carrier equipped with a cylindrical battery;

A carrier transfer sprocket rotatably installed on the frame to transfer the carriers transported along the guide rail at predetermined intervals, and a driving unit installed on the frame to rotate the carrier transfer sprocket;

At least one first marking unit installed on a first support part installed in the frame and marking a history on an outer circumferential surface of a cylindrical battery mounted on a carrier along the guide rail by a carrier transfer sprocket and moved;

At least one marking inspection unit mounted on a second support part installed on the frame so as to be spaced apart from the first marking unit in the circumferential direction of the carrier transfer sprocket by a predetermined distance and detecting a history marking state in which marking has been made by the first marking unit It is characterized by what is provided.

In order to achieve the above object, a marking method using a cylindrical battery marking device of the present invention includes a cylindrical battery upper inspection step of inspecting the upper surface of a cylindrical battery moving along a guide rail using a camera,

A secondary battery height detection step of detecting the height of the secondary battery moving along the guide rail after the upper part is inspected by the upper inspection step using a total height detection sensor;

A lot printing step of printing a lot on an outer circumferential surface of the cylindrical battery using a lot printing machine while moving the cylindrical battery in which the gun height has been detected in the longitudinal direction;

A lot printing inspection step of detecting the printing state of the lot printed on the outer circumferential surface of the cylindrical battery moving in the longitudinal direction;

A step of inspecting the lower surface of the cylindrical battery for which the lot has been inspected by using a camera to detect the lower surface of the cylindrical battery;

A carrier mounting step of mounting the cylindrical battery, which has been inspected, on a carrier for individually moving the lower surface of the cylindrical battery;

A marking step of marking a history on the outer circumferential surface of the secondary battery using a first marking unit while transferring the cylindrical battery equipped with the carrier at a predetermined interval by a transfer unit;

and a marking inspection step of detecting a state of history marking on an outer circumferential surface of the cylindrical battery transported by the transfer unit in a state in which the marking is made.

In the present invention, a marking information transmission step of transmitting the marking history information marked on the outer circumferential surface of the cylindrical battery by the marking device to a main server in charge of production of the cylindrical battery is further provided.

The cylindrical battery marking device of the present invention and the cylindrical battery marking method using the same can detect the state of the cylindrical battery and the marking state of the lot and history on its outer circumferential surface, thereby efficiently performing the marking process of the lot and history, thereby increasing productivity. can be promoted, and since the marking information of the secondary battery can be shared with the main server by the marking device, it is easy to manage the production history of the cylindrical battery.

1 is a plan view of a cylindrical battery marking device according to the present invention;
2 is a side view of a cylindrical battery marking device according to the present invention, showing a state in which a marking unit is installed.
3 is a side view of a cylindrical battery marking device according to the present invention showing a state in which a marking inspection unit is installed.
4 is a diagram showing a marking method using a marking device for a cylindrical battery according to the present invention step by step;
5 is a block diagram showing a marking method using a marking device for a cylindrical battery according to the present invention.

An embodiment of a marking device for a cylindrical battery according to the present invention and an embodiment of a marking method for a cylindrical battery using the same are shown in FIGS. 1 to 4 .

Referring to the drawings, a marking device 10 for a cylindrical battery according to the present invention has a frame 11 and a cylindrical battery rotatably installed on the frame 11 by a drive shaft 21 and supported by a carrier 310 on an outer circumferential surface. A carrier transport wheel 25 having first support grooves 22 for supporting and moving the battery 300, and a carrier guide 30 installed in a semicircular trajectory along the outer circumferential surface of the carrier transport wheel 25 provide A carrier support part 26a for supporting the carrier 310 is further provided on the lower side of the carrier transport wheel 25, that is, on the lower side corresponding to the first support groove 22.

In addition, the cylindrical battery 300 supported by the carrier 310 installed adjacent to the carrier transport wheel 25 and supplied by the supply side guide rail 320 is placed in the first support groove 22 of the carrier transport wheel 25. ) and a carrier guide 30, and a supply carrier transport wheel 40 having second support grooves 41 formed on the outer circumferential surface at the same pitch as the first support grooves 22.

It is installed on the side corresponding to the supply carrier transport wheel 40 to discharge the cylindrical battery 300 discharged by the carrier transport wheel 25 to the discharge side guide rail 330, and has a third support groove on the outer circumferential surface. (51) is provided with a discharge carrier transport wheel (50).

And the frame 11 is provided with a driving unit 26 for driving the drive shaft 21, the driving unit 26 may be made of a geared motor. The drive unit 26 can simultaneously drive the supply carrier transfer wheel 40, the discharge carrier transfer wheel 50, and the carrier transfer wheel 25. In this case, although not shown in the drawings, a separate power transmission mechanism may be further provided.

On the other hand, the frame 11 includes a marking unit 60 for marking a history along the outer circumferential surface of the carrier transport wheel 25 between the supply carrier transport wheel 40 and the discharge carrier transport wheel 50, and the A mark inspection unit 70 for inspecting marks marked by the marking unit 60 is provided.

The marking unit 60 includes a first table unit 61 installed on a frame and capable of fine adjustment in the X-axis direction and the Y-axis direction, and a first support member 62 installed perpendicularly to the table unit 61. and a printer 65 capable of adjusting an arbitrary angle by an angle adjusting unit 64 installed on the first support member 62. The printer 65 may be an inkjet printer or a laser printer capable of printing barcodes or QR codes, but is not limited thereto.

The first table unit 61 has a structure capable of fine adjustment in the X-axis direction and the Y-direction, and is provided with micrometers supported by brackets installed on the table in the X-axis direction and the table in the Y-axis direction, respectively.

And the mark inspection unit 70 is for detecting the printing state of the mark marked by the marking unit 60, as shown in Figures 1 and 3, a plurality of marks on the outer circumference of the carrier guide 30 can be installed The mark inspection unit 70 includes a second table unit 71 installed on the frame 11, a second support member 72 installed on the second table unit 71, and the second support member ( 72), a camera 73 is installed to photograph the mark printed on the cylindrical battery 300. A lighting unit 75 is installed on the second support member 72 to illuminate the mark for photographing.

The printer and marking device are controlled by the local control unit 400 (see FIG. 4), and the image captured by the camera 73 is compared with the reference image of the mark stored in the local control unit 400 to determine the printing state of the mark. to judge

On the other hand, the above-described cylindrical battery marking method using the cylindrical battery marking device includes a lot marking method of marking a lot on the outer circumferential surface of the sequentially moving cylindrical battery 300 and a method of marking history using a cylindrical battery marking device. be explained in parallel.

The marking method of such a cylindrical battery was shown in FIGS. 1 to 4 and 5.

Referring to the drawing, the marking method for marking the lot and history of a cylindrical battery is a cylindrical battery upper inspection in which the upper surface of the cylindrical battery 300 transported by the guide rail and the conveyor is inspected using the first camera unit 121 After the upper part is inspected by step 120 and the upper inspection step 120, a gun height detection sensor 131 for detecting the height of the cylindrical battery 300 moving along a guide rail (not shown), that is, the gun height. ) is used to perform the gun height inspection step 130 of the cylindrical battery for detecting the gun height.

In the upper inspection step 120, the image captured by the first camera unit 121 for inspecting the upper portion of the cylindrical battery 300 is compared with a reference image set in the server, and the upper surface of the cylindrical battery 200 It includes a local control unit 400 that determines the deformed state, the overturned state of the cylindrical battery, and the like. Although the local control unit 400 is not specifically limited in the drawings, it may include a storage unit for storing data, an image determination unit, and an equipment control unit for controlling each process.

The total height inspection step 130 of the cylindrical battery 300 is installed on a side adjacent to the guide rail, and the total height detection sensor 131 for measuring the height of the cylindrical battery 300 includes a light emission sensor, a proximity sensor, and a laser sensor. It can be made of one selected among them.

As described above, when the detection of the upper surface and the total height of the cylindrical battery 300 is completed, a lot printing step 140 of printing a lot on the outer circumferential surface of the cylindrical battery and detecting the printing state of the lot printed on the cylindrical battery 300 A lot print inspection step 150 is performed.

The lot printing device for performing the lot printing step 140 for printing a lot on the outer circumferential surface of the cylindrical battery 300 is to lay the cylindrical battery vertically moved along the guide rail in the longitudinal direction using a transfer conveyor and move , A lot is printed on the outer circumferential surface of the cylindrical battery 300 using a lot printing unit installed at the edge of the transfer conveyor. An inkjet printer may be used as the lot printing unit 145, but is not limited thereto.

The lot printing inspection step 150 includes a second camera 151 for detecting a state of printing the lot. The image captured by the second camera 151 determines the printing state of the lot by the local control unit 400 .

When the lot printing inspection step 150 is completed, the lower surface inspection step 160 of the cylindrical battery for inspecting the lower surface of the cylindrical battery 300 is performed. The lower surface inspection step 160 of the cylindrical battery 300 is substantially the same as the upper surface inspection step of the cylindrical battery. That is, a photograph is taken using the third camera 161 installed on the lower surface of the cylindrical battery 300, and the local control unit 400 judges the image as in the upper surface inspection step.

As described above, the cylindrical battery 100 subjected to the lot printing inspection step 150 and the upper surface inspection step is transported by the transfer conveyor and the above-described marking device 10 Marks the history on the outer circumferential surface of the cylindrical battery 100 The marking step 170 is performed.

The marking step 170 includes a history marking step 171 of marking a history using a barcode or QR code on the outer circumferential surface of the cylindrical battery 100 moving along the carrier guide 30 by the carrier transport wheel 25. A mark inspection step 172 of detecting the printing state of the mark marked on the outer circumferential surface of the cylindrical battery 100 is included.

As shown in FIGS. 1, 2 and 4, the history marking step 171 rotates the cylindrical battery transferred to the supply side guide rail 320 by the conveyor by the driving unit 26 of the marking device 10. Cylindrical battery loading in which the cylindrical battery 300 is gripped by the second support groove 31 of the supply carrier wheel 30 and the first support groove 26 of the carrier transport wheel 25 and loaded into the carrier guide 30 steps will be performed. A moving step of moving the loaded cylindrical battery 300 along the carrier guide 30 while being supported by the first support groove 26 of the carrier transport wheel 25 is performed.

As described above, when the cylindrical battery 30 moving along the carrier guide 30 is positioned in front of the marking unit 60, the cylindrical battery 300 is printed by the printer 65 supported by the first table unit 61. The history marking step 171 of marking the history on the outer circumferential surface of is performed. In this process, rotation of the carrier transport wheel 25 by the driving unit 26 may be intermittently performed.

As described above, when the history marking step 171 is completed, the cylindrical battery 300 is moved along the carrier guide 30 in a state supported by the first support groove 22 of the carrier transport wheel 25, A mark inspection step 172 of inspecting a mark by the mark inspection unit 70 of the marking device 10 is performed.

In the mark inspection step 172, the printed mark is photographed using the camera 73 supported on the second table unit 71, and the photographed image is compared with the image set by the local control unit 400 for marking. status will be checked.

When the inspection of the marked state by the marking inspection unit is completed as described above, the cylindrical battery is moved along the carrier guide 30 by the carrier wheel 25, and the discharge carrier wheel 40 installed on the outlet side thereof It is discharged to the guide rail 320 on the discharge side by the carrier transport wheel 25.

As described above, when the marking step is completed, the production history transmission step 180 of transmitting the production history related to lot marking and history marking stored in the server to the main server is performed by the local control unit 400 .

As described above, the marking device for a cylindrical battery and the marking method for a cylindrical battery using the same according to the present invention can improve productivity because the history marking and inspection are performed while the cylindrical battery moves continuously or intermittently. , Marking and inspection are performed simultaneously, so the occurrence of defective rate can be drastically reduced. In particular, it is possible to control the production of cylindrical batteries by supplying the information of the local control unit including the marking device to the main server.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is only exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the attached registered claims.

Claims (5)

The frame 11 and the cylindrical battery 300 rotatably installed on the frame 11, transported along the guide rail 320 on the supply side, and supported by the carrier 310, are rotatably installed on the outer circumferential surface to transport the cylindrical battery 300 at predetermined intervals. A carrier transport wheel 25 having a first support groove 22 and a drive unit 26 installed on the frame 11 to rotate the carrier transport wheel 25;
A semicircular carrier guide 30 formed along the outer circumferential surface of the carrier transport wheel 25 at a predetermined interval from the carrier transport wheel 25;
By supplying the cylindrical battery 300 supported by the carrier supplied by the guide rail 320 installed adjacent to the carrier transport wheel 25 to the carrier guide, the outer circumferential surface of the first support groove 22 A supply carrier transport wheel 40 having second support grooves 41 formed at the same pitch as the pitch;
It is installed on the side corresponding to the supply carrier transport wheel 40 and is for discharging the cylindrical battery 300 discharged by the carrier transport wheel 25 to the guide rail 330 on the discharge side, and a third support on the outer circumferential surface. It has a discharge carrier wheel 50 formed with a groove 51,
At least one marking unit 60 for marking a history on the outer circumferential surface of the cylindrical battery installed on the frame 11 and moving along the carrier guide;
A mark inspection unit 70 installed on the frame 11 so as to be spaced apart from the marking unit 60 by a predetermined distance and detecting the printing state of the mark marked by the marking unit 60,
The carrier transfer wheel 25 is a marking device for a cylindrical battery, characterized in that further provided with a carrier support portion (26a) for supporting the carrier on the vertical lower side of the first inlet portion (22). delete According to claim 1,
The marking unit 60 includes a first table unit 61 installed on a side adjacent to the carrier guide 30 and a printer 65 supported by the first table unit 61. Marking device for a cylindrical battery to be. According to claim 1,
The mark inspection unit 70 includes a second table unit 71 installed on a side adjacent to the carrier guide 30, a camera 73 supported by the second table unit 71, and the first A marking device for a cylindrical battery, characterized in that it includes a lighting unit 75 installed on the second support member 72 supported by the two-table unit 71. Cylindrical battery upper inspection step 120 of inspecting the upper surface of the cylindrical battery moving along the guide rail using a camera;
A cylindrical battery height detection step (130) of detecting the height of the cylindrical battery moving along the guide rail after the upper part is inspected by the upper inspection step (120) using a height detection sensor (131);
A lot printing step 140 of printing a lot on the outer circumferential surface of the cylindrical battery by using a lot printing machine while moving the cylindrical battery in which the total height has been detected in the longitudinal direction;
A lot printing inspection step 150 of detecting the printing state of the lot printed on the outer circumferential surface of the cylindrical battery moving in the longitudinal direction;
Inspection step 160 of the lower surface of the cylindrical battery for detecting the lower surface of the cylindrical battery for which the lot has been inspected using a camera;
A carrier mounting step of mounting the cylindrical battery, which has been inspected, on a carrier for individually moving the lower surface of the cylindrical battery;
The frame 11 and the cylindrical battery 300 rotatably installed on the frame 11, transported along the guide rail 320 on the supply side, and supported by the carrier 310, are rotatably installed on the outer circumferential surface to transport the cylindrical battery 300 at predetermined intervals. A carrier transport wheel 25 having a first support groove 22, a driving unit 26 installed on the frame 11 to rotate the carrier transport wheel 25, and a predetermined carrier transport wheel 25 Cylindrical batteries supported by semicircular carrier guides 30 formed along the outer circumferential surface of the carrier transport wheel 25 in a spaced apart state, and carriers installed adjacent to the carrier transport wheel 25 and supplied by the guide rails. to the carrier guide, the supply carrier transport wheel 40 having second support grooves 41 formed on the outer circumferential surface at the same pitch as the first support grooves 22, and the supply carrier transport wheel 40 It is installed on the side corresponding to the carrier transport wheel 25 to discharge the cylindrical battery 300 discharged by the discharge side guide rail 330, and a discharge carrier having a third support groove 51 formed on the outer circumferential surface It has a wheel 50 and is installed on the frame 11 and is moved along the carrier guide 30 by using at least one marking unit 60 for marking a history on the outer circumferential surface of the cylindrical battery 300. A marking step 170 of marking a history on the outer circumferential surface of the battery.
A mark inspection unit 70 installed on the frame 11 so as to be spaced apart from the marking unit 60 by a predetermined distance is used to detect the printing state of the mark marked by the marking unit 60 on the outer circumferential surface of the cylindrical battery. A marking method for a cylindrical battery using a marking device for a cylindrical battery, comprising a mark inspection step (172) for inspecting the printed mark.

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