CN216117372U

CN216117372U - Pole piece defect detection device

Info

Publication number: CN216117372U
Application number: CN202122390710.8U
Authority: CN
Inventors: 姜林华; 曹卫欣; 朱亮亮
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-03-22
Anticipated expiration: 2031-09-29

Abstract

The utility model provides a pole piece defect detection device which comprises a base, a backlight plate, an illumination unit, a first dust removal mechanism and a detection mechanism. The illuminating unit is provided with an illuminating light source arranged on the base, and the illuminating light source is positioned below the backlight plate and is used for illuminating the backlight plate; the first dust removal mechanism is provided with a dust collection part which is arranged on the base and is positioned on one side of the backlight plate, and the dust collection part is used for adsorbing dust on the backlight plate; the detection mechanism comprises a data processing unit and an image acquisition unit arranged above the backlight plate; the image acquisition unit is used for acquiring image information of the anode plate and the cathode plate which are arranged on the backlight plate in a laminated manner and sending the image information to the data processing unit; the data processing unit is used for receiving and processing the image information acquired by the image acquisition unit and obtaining a defect detection result. The pole piece defect detection device can adsorb dust on the backlight plate, so that the influence of the dust on the detection precision is reduced.

Description

Pole piece defect detection device

Technical Field

The utility model relates to the technical field of lithium battery pole piece detection, in particular to a pole piece defect detection device.

Background

The manufacturing process of the lithium ion battery is very complex, and the manufacturing process of the battery pole group comprises two processes of lamination and winding. At present, the laminated lithium ion battery has wider and wider application because the comprehensive performance of the laminated lithium ion battery is better than that of a wound lithium ion battery.

In the preparation process of lamination lithium ion battery, need earlier just, the negative pole piece is handled through the cross cutting respectively to cut into certain size just, the negative pole piece, afterwards, will just, the negative pole piece is accomodate to the material frame in, and guarantee just through plastic mechanism, the uniformity of negative pole piece position in the material frame, then transport the lamination process with the material frame, process such as rethread lamination material loading, rectifying, the single piece is just, the negative pole piece superposes into required electric core with certain law.

However, in the above manufacturing process, since the positive and negative electrode sheets after the die-cutting process are subjected to multiple operations, the four corners of the positive and negative electrode sheets are easily bent and damaged during the entire operation. However, the size design of the positive and negative electrode plates must comply with the requirement that the size of the negative electrode plate is larger than that of the positive electrode plate, i.e. the negative electrode plate must completely cover the positive electrode plate, which is a key control item for preventing the lithium battery from catching fire and is also a key point for the safety design of the lithium battery.

Therefore, in the lamination process, the integrity of the negative electrode plate must be ensured, and the negative electrode plate is not allowed to be damaged, so that the potential safety hazard caused by the fact that the negative electrode plate cannot completely cover the positive electrode plate is avoided. At present, in order to ensure that the negative electrode sheet can completely cover the positive electrode sheet, before the lamination process, a CCD detection device is generally used to detect defects of the positive and negative electrode sheets so as to ensure the integrity of the positive and negative electrode sheets.

Because the material condition exists to fall at the operation in-process in positive and negative pole piece, the material powder that drops can pile up on CCD board in a poor light to cause the pollution to the board in a poor light, and then influence the degree of accuracy and the detection efficiency that CCD detected. However, the existing CCD detection device still has shortcomings in structural design, and cannot well solve the problem that the detection precision and detection efficiency are affected by the pollution of the backlight plate.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a pole piece defect detecting device, which can clean dust on a backlight plate.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

the utility model provides a pole piece defect detecting device, includes the base, pole piece defect detecting device still includes:

the backlight plate is arranged on the base;

the illumination unit is provided with an illumination light source arranged on the base, and the illumination light source is positioned below the backlight plate and is used for illuminating the backlight plate;

the first dust removal mechanism is provided with a dust absorption part which is arranged on the base and is positioned on one side of the backlight plate, and the dust absorption part is used for absorbing dust on the backlight plate;

the detection mechanism comprises a data processing unit and an image acquisition unit arranged above the backlight plate; the image acquisition unit is used for acquiring image information of the anode plate and the cathode plate which are arranged on the backlight plate in a laminated mode and sending the image information to the data processing unit; the data processing unit is used for receiving and processing the image information acquired by the image acquisition unit and obtaining a defect detection result.

Furthermore, the first dust removal mechanism is also provided with a sweeping part which is arranged on the base and is positioned on the other side of the backlight plate, the sweeping part is used for sweeping the dust on the backlight plate, and a sweeping port of the sweeping part and an adsorption port of the dust absorption part are arranged oppositely.

Furthermore, the purging port and the adsorption port are both in a long strip shape, and the purging port and the adsorption port are arranged in parallel with the upper surface of the backlight plate.

Further, the illumination light source adopts a flat light source.

Furthermore, a sinking groove is concavely formed on the base, and the illumination light source is arranged in the sinking groove.

Furthermore, the image acquisition unit comprises a CCD camera, and the CCD camera is arranged right above the backlight plate.

The backlight plate is characterized by further comprising a second dust removal mechanism, wherein the second dust removal mechanism comprises an adsorption channel formed in the backlight plate, one end of the adsorption channel is communicated with the top of the backlight plate, and the other end of the adsorption channel is connected with the negative pressure adsorption unit.

Furthermore, the adsorption channel comprises a cavity formed inside the backlight plate, a connecting hole arranged on the backlight plate and used for communicating the cavity with the negative pressure adsorption unit, and a plurality of vent holes arranged on the backlight plate and positioned above the cavity.

Further, the backlight plate is detachably arranged on the base.

Furthermore, the side walls of the two opposite sides of the backlight plate are provided with inserting protrusions, and the base is provided with slots for the two inserting protrusions to insert into.

Compared with the prior art, the utility model has the following advantages:

according to the pole piece defect detection device, the first dust removal mechanism is arranged, dust on the backlight plate can be adsorbed, the upper surface of the backlight plate is cleaned, the detection precision of the detection mechanism for detecting the defects of the positive pole piece and the negative pole piece due to the fact that the backlight plate is polluted by the dust is further avoided, meanwhile, the frequency of replacing the backlight plate can be reduced, and therefore the detection operation efficiency is effectively improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic overall structure diagram of a pole piece defect detection apparatus according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is a schematic view of the internal structure of the adsorption channel according to the embodiment of the present invention;

fig. 4 is a schematic structural diagram of positive and negative electrode sheets arranged in a stacked manner according to an embodiment of the present invention;

description of reference numerals:

1. a base; 101. sinking a groove; 102. a slot;

2. a backlight plate; 201. a cavity; 202. connecting holes; 203. a vent hole; 204. inserting the bulge;

3. an illumination light source; 4. a dust suction part; 5. an image acquisition unit; 6. a purge section; 601. a purge port; 7. and (4) corners.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", "front", "rear", "left", "right", etc. appear, they are based on the orientation or positional relationship shown in the drawings and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The utility model relates to a pole piece defect detection device, which comprises a base 1, a backlight plate 2, an illumination unit, a first dust removal mechanism and a detection mechanism on the whole structure as shown in figure 1. Wherein, the backlight plate 2 is arranged on the base 1. The illumination unit has an illumination light source 3 provided on the base 1, and the illumination light source 3 is located below the backlight 2 and illuminates the backlight 2. The first dust removing mechanism is provided with a dust suction part 4 which is arranged on the base 1 and is positioned on one side of the backlight plate 2, and the dust suction part 4 is used for absorbing dust on the backlight plate 2.

The detection mechanism comprises a data processing unit and an image acquisition unit 5 arranged above the backlight plate 2. The image acquisition unit 5 is used for acquiring image information of the anode and cathode sheets which are arranged on the backlight plate 2 in a stacked mode and sending the image information to the data processing unit. The data processing unit is used for receiving and processing the image information acquired by the image acquisition unit 5 and obtaining a defect detection result.

It should be noted that the lighting unit in this embodiment is further externally connected with an external power source, and the lighting unit further includes an electric wire for connecting the external power source and the lighting source 3. The dust of this embodiment generally refers to the falling powder on the positive and negative electrode pieces, and the first dust removing mechanism of this embodiment further includes a negative pressure fan connected to the dust collecting part 4.

Meanwhile, the data processing unit in the present embodiment is preferably a conventional PLC controller having an image processing function, which is not shown in the drawings; in practical application, the image information acquired by the image acquisition unit 5 is image gray scale information, which is generally image gray scale information at four corners 7 of the positive and negative plates arranged in a stacked manner as shown in fig. 4, and the data processing unit analyzes and processes the image gray scale information at the four corners 7 to determine whether the positive and negative plates have defects.

In addition, the structural configuration of the base 1 in this embodiment can be designed according to actual installation requirements of the backlight panel 2, the illumination unit, the first dust removal mechanism, and other components, and the structures of the pole piece defect detection device in this embodiment that are not mentioned can refer to common structural parts in the prior art, and are not described herein again.

Based on the above overall description, as a preferred embodiment, as shown in fig. 1, the first dust removing mechanism of this embodiment further includes a purging unit 6 disposed on the base 1 and located on the other side of the backlight panel 2, the purging unit 6 is used for purging the dust on the backlight panel 2, and the purging port 601 of the purging unit 6 is disposed opposite to the adsorption port of the dust collecting unit 4. Preferably, the purge opening 601 and the adsorption opening are both long, and fig. 2 shows that the purge opening 601 is long, and the purge opening 601 and the adsorption opening are arranged flush with the upper surface of the backlight plate 2, so as to obtain good dust purging effect and adsorption effect.

In specific implementation, the dust removing mechanism further comprises a blower connected with the blowing part 6, and in the state shown in fig. 1, the blowing part 6 and the dust collecting part 4 are respectively arranged on the left side and the right side of the base 1. The structure of the blowing part 6 is preferably designed to be cylindrical with an inner cavity, and the structure of the dust suction part 4 is preferably designed to be flat with an inner cavity.

Of course, in order to arrange the purge port 601 and the adsorption port flush with the upper surface of the backlight panel 2, support platforms formed by protruding along the height direction are provided on the left and right sides of the base 1, and the purge portion 6 and the dust suction portion 4 are provided on the support platforms on the left and right sides, respectively. Besides, the external shapes of the blowing part 6 and the dust suction part 4 are cylindrical and flat, and can be adjusted and set according to the actual application requirements.

Referring to fig. 1, the illumination light source 3 of the present embodiment is preferably a flat panel light source. And as a further arrangement, a sunken groove 101 is concavely formed on the base 1, and the illumination light source 3 is arranged in the sunken groove 101. Of course, in practical applications, the illumination light source 3 may be fixed in the sinking groove 101 by a conventional technique, such as fixing with an adhesive tape or a bolt.

Preferably, the image capturing unit 5 of the present embodiment includes a CCD camera, and the CCD camera is disposed directly above the backlight 2. By the arrangement, the image information of the positive and negative plates can be acquired well. In specific implementation, a bracket for positioning and mounting the CCD camera is further provided in this embodiment, and the structural design and the position design of the bracket are set according to actual mounting requirements.

Also preferably, the pole piece defect detecting device of the present embodiment further includes a second dust removing mechanism to enhance the dust removing effect. As shown in fig. 1 and 3, the second dust removing mechanism includes an adsorption channel formed in the backlight plate 2, one end of the adsorption channel is communicated with the top of the backlight plate 2, and the other end of the adsorption channel is connected to the negative pressure adsorption unit. Here, the negative pressure adsorption unit may employ a conventional negative pressure blower.

As shown in fig. 3, the adsorption channel includes a cavity 201 formed inside the backlight plate 2, a connection hole 202 disposed on the backlight plate 2 for communicating the cavity 201 with the negative pressure adsorption unit, and a plurality of vent holes 203 disposed on the backlight plate 2 and located above the cavity 201. In specific implementation, the air vents 203 are uniformly and intermittently disposed on the backlight panel 2 to achieve a better dust absorption effect.

In this embodiment, it is preferable that the backlight plate 2 is detachably provided on the base 1, so that the backlight plate 2 can be replaced and cleaned conveniently. As a further improvement, as shown in fig. 1 and fig. 2, insertion protrusions 204 are provided on two opposite side walls of the backlight panel 2, and the base 1 is provided with insertion slots 102 for the insertion of the two insertion protrusions 204, so as to form an insertion of the backlight panel 2 on the base 1.

It should be noted that, with reference to fig. 1, the blowing unit 6 and the dust collecting unit 4 are also respectively located at two opposite sides of the backlight plate 2 where the insertion protrusion 204 is located, so that the device has a better structural arrangement effect, and the use effect is further improved.

In this embodiment, in addition to the detachable arrangement between the backlight panel 2 and the base 1 by the insertion, other detachable forms may be adopted, such as a form of connecting the backlight panel 2 and the base 1 by a plurality of bolts. Of course, in order to stably insert the backlight panel 2 into the slot 102, the backlight panel 2 may be fixed to the base 1 in a conventional structure fixing manner in this embodiment, for example, through holes are formed in the backlight panel 2 and the base 1, and a rod member such as a bolt is inserted into each through hole, so that the backlight panel 2 is fixed relative to the base 1.

This embodiment pole piece defect detection device through setting up first dust removal mechanism, can adsorb the processing to the dust on the board 2 in a poor light, realizes the cleanness to the board 2 upper surface in a poor light, and then avoids detection mechanism to reduce because of the board 2 in a poor light is by dust pollution and adjust well, the detection precision of negative pole piece defect, simultaneously, can also reduce the frequency of changing board 2 in a poor light to effectively improve and detect the operating efficiency.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a pole piece defect detecting device, includes base (1), its characterized in that still includes:

the backlight plate (2) is arranged on the base (1);

a lighting unit having a lighting source (3) provided on the base (1), the lighting source (3) being located below the backlight plate (2) and configured to illuminate the backlight plate (2);

the first dust removal mechanism is provided with a dust absorption part (4) which is arranged on the base (1) and is positioned on one side of the backlight plate (2), and the dust absorption part (4) is used for absorbing dust on the backlight plate (2);

the detection mechanism comprises a data processing unit and an image acquisition unit (5) arranged above the backlight plate (2); the image acquisition unit (5) is used for acquiring image information of the anode and cathode sheets which are arranged on the backlight plate (2) in a stacked mode and sending the image information to the data processing unit; the data processing unit is used for receiving and processing the image information acquired by the image acquisition unit (5) and obtaining a defect detection result.

2. The pole piece defect detection device of claim 1, wherein: the first dust removal mechanism is further provided with a sweeping part (6) which is arranged on the base (1) and located on the other side of the backlight plate (2), the sweeping part (6) is used for sweeping the dust on the backlight plate (2), and a sweeping opening (601) of the sweeping part (6) and an adsorption opening of the dust collection part (4) are arranged oppositely.

3. The pole piece defect detection device of claim 2, wherein: the blowing opening (601) and the adsorption opening are both in a long strip shape, and the blowing opening (601) and the adsorption opening are arranged in parallel with the upper surface of the backlight plate (2).

4. The pole piece defect detection device of claim 1, wherein: the illumination light source (3) adopts a flat light source.

5. The pole piece defect detection device of claim 4, wherein: a sunken groove (101) is formed in the base (1) in an inwards concave mode, and the lighting light source (3) is arranged in the sunken groove (101).

6. The pole piece defect detection device of claim 1, wherein: the image acquisition unit (5) comprises a CCD camera, and the CCD camera is arranged right above the backlight plate (2).

7. The pole piece defect detection device of claim 1, wherein: the dust removal device is characterized by further comprising a second dust removal mechanism, wherein the second dust removal mechanism comprises an adsorption channel formed in the backlight plate (2), one end of the adsorption channel is communicated with the top of the backlight plate (2), and the other end of the adsorption channel is connected with the negative pressure adsorption unit.

8. The pole piece defect detection device of claim 7, wherein: the adsorption channel comprises a cavity (201) formed inside the backlight plate (2), a connecting hole (202) arranged on the backlight plate (2) and used for communicating the cavity (201) with the negative pressure adsorption unit, and a plurality of vent holes (203) arranged on the backlight plate (2) and positioned above the cavity (201).

9. The pole piece defect detection device of any one of claims 1 to 8, wherein: the backlight plate (2) is detachably arranged on the base (1).

10. The pole piece defect detection device of claim 9, wherein: the backlight module is characterized in that insertion protrusions (204) are arranged on the side walls of the two opposite sides of the backlight plate (2), and insertion grooves (102) for the insertion of the two insertion protrusions (204) are formed in the base (1).