Pole piece slitting equipment

Abstract

The utility model belongs to the technical field of batteries, and discloses pole piece slitting equipment which comprises an incoming material traction assembly, a cutting assembly and a cutting assembly. A slitting device; a visual detection device; the first deviation rectifying device is used for rectifying deviation of the pole piece according to the first image information acquired by the first detection unit. According to the utility model, the first image information of the first surface of the first sub-pole piece is obtained through the first detection element, the second image information of the second surface of the first sub-pole piece is obtained through the second detection element, and the third image information of the first surface of the second sub-pole piece is obtained through the third detection element; the fourth detection element obtains fourth image information of the second surface of the second sub-pole piece and communicates with the first deviation correction device through the first detection unit, and the first deviation correction device conducts deviation correction on the pole piece through the first image information obtained by the first detection unit. Therefore, the total coating amount of the first sub-pole piece and the second sub-pole piece is the same after the pole piece is slit, and the yield of the battery in formation and capacity grading is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a pole piece cutting device. Background Art

[0002] In the battery production process, the electrode needs to be cut, that is, the electrode is divided into two. After the electrode is cut, it is necessary to ensure that the total coating width of the two electrode pieces after cutting is equal, so as to avoid the subsequent battery capacity being too low or too high due to the unequal total coating width of the two electrode pieces after cutting, resulting in battery quality problems and waste of resources.

[0003] After the existing slitting equipment slits the electrodes, it can only detect the coating width of electrode 1-A surface and electrode 2-A surface, but cannot measure the coating width of electrode 1-B surface and electrode 2-B surface, resulting in the inability to achieve equal total coating width of electrode 1 and electrode 2 after slitting.

[0004] Chinese utility model patent CN208224854U discloses a device for regulating the consistency of electrode width, including a monitoring system 1 and a correction system 2 electrically connected to the monitoring system 1, wherein the monitoring system 1 includes an image monitoring device 11 for collecting electrode 3 width information and a processing device 12 for displaying and analyzing electrode 3 width information, wherein the image monitoring device 11 is a CCD camera or a CMOS camera and is electrically connected to the processing device 12; the correction system 2 includes a correction driver 22 for adjusting the tape running of the electrode 3, a correction controller 21 for controlling the correction driver 22, and a correction sensor 23 for sensing and detecting the tape running of the electrode 3, wherein the correction driver 22 and the correction sensor 23 are both electrically connected to the correction controller 21. According to the disclosed technical content and the accompanying drawings, the above technical solution can only realize the coating width detection of the electrode 1-A surface and the electrode 2-A surface, and cannot achieve the total coating width of the electrode 1 and the electrode 2 equal after slitting. Utility Model Content

[0005] In order to overcome at least one of the defects described in the above-mentioned prior art, the utility model provides a pole piece slitting device, which obtains first image information of the first surface of the first pole piece through a first detection element, obtains second image information of the second surface of the first pole piece through a second detection element, obtains third image information of the first surface of the second pole piece through a third detection element, and obtains fourth image information of the second surface of the second pole piece through a fourth detection element, and communicates with a first correction device through a first detection unit. The first correction device corrects the pole piece through the first image information obtained by the first detection unit, so that the total amount of coating on the first pole piece and the second pole piece after slitting can be the same, thereby improving the yield of the battery in chemical composition.

[0006] The technical solution adopted by the present invention to solve the problem is:

[0007] A pole piece cutting device, comprising:

[0008] Incoming material traction assembly, which is used to guide the electrode to be transported in the processing direction;

[0009] The deviation-correcting assembly includes a first deviation-correcting device;

[0010] A slitting device, which is used to slit the electrode piece into a first divided electrode piece and a second divided electrode piece;

[0011] A visual detection device, the visual detection device includes a first detection unit, the first detection unit includes a first detection element, a second detection element, a third detection element, and a fourth detection element, the first detection element is used to obtain first image information of the first surface of the first polarizer, the second detection element is used to obtain second image information of the second surface of the first polarizer, the third detection element is used to obtain third image information of the first surface of the second polarizer, and the fourth detection element is used to obtain fourth image information of the second surface of the second polarizer;

[0012] The first detection unit communicates with the first deviation-correcting device, and the first deviation-correcting device corrects the deviation of the pole piece based on the first image information obtained by the first detection unit;

[0013] The first image information includes first image information, second image information, third image information, and fourth image information.

[0014] In a preferred embodiment, the first surface of the first polarizer and the second surface of the first polarizer are respectively arranged on opposite sides of the first polarizer;

[0015] The first surface of the second polarizer and the second surface of the second polarizer are respectively arranged on two opposite surfaces of the second polarizer.

[0016] In a preferred embodiment, the first detection element detects that the coating width on the first surface of the first polarizer is A1, and the second detection element detects that the coating width on the second surface of the first polarizer is B1. The total amount of coating on both sides of the first polarizer is a, a=A1+B1;

[0017] The third detection element detects that the coating width on the first surface of the second polarizer is A2, and the fourth detection element detects that the coating width on the second surface of the second polarizer is B2. The total amount of coating on both sides of the second polarizer is b, b=A2+B2;

[0018] The correction amount of the first correction device is c, c = |ab| / 4.

[0019] In a preferred embodiment, the first correcting device is arranged close to the slitting device, and the arrangement distance between the first correcting device and the slitting device is L, 0.1m≤L≤1m, where m is a unit of meter.

[0020] In a preferred embodiment, the incoming material traction assembly further includes an unwinding roller, a first polarization sheet winding roller, and a second polarization sheet winding roller;

[0021] The unwinding roller is used to unwind the pole piece;

[0022] The first pole piece winding roller is used for winding the first pole piece;

[0023] The second pole piece winding roller is used for winding the second pole piece.

[0024] In a preferred embodiment, the incoming material traction assembly further includes a passing roller, and at least one passing roller is provided between the unwinding roller and the first polarizer winding roller and between the unwinding roller and the second polarizer winding roller.

[0025] In a preferred embodiment, the first deviation-correcting device, the slitting device and the first detection unit are sequentially arranged along the processing direction of the pole piece.

[0026] In a preferred embodiment, the correction assembly further includes a second correction device, which is used to correct the unwinding of the pole piece.

[0027] In a preferred embodiment, the visual inspection device further comprises a second inspection unit, the second inspection unit communicates with the first deflection correction device, and the second image information acquired by the second inspection unit is fed back to the first deflection correction device to assist the pole piece in deflection correction;

[0028] The second detection unit includes a fifth detection element and a sixth detection element, the fifth detection element is used to obtain fifth image information of the first surface of the pole piece, and the sixth detection element is used to obtain sixth image information of the second surface of the pole piece;

[0029] The first surface of the pole piece and the second surface of the pole piece are respectively arranged on two opposite sides of the pole piece;

[0030] The second image information includes fifth image information and sixth image information;

[0031] The second detection unit, the first deviation-correcting device, the slitting device and the first detection unit are arranged in sequence along the processing direction of the pole piece.

[0032] In a preferred embodiment, the first detection element, the second detection element, the third detection element, the fourth detection element, the fifth detection element and the sixth detection element are all CCD cameras.

[0033] In summary, the present invention has the following technical effects:

[0034] 1. The utility model obtains first image information of the first surface of the first polarizer through the first detection element, obtains second image information of the second surface of the first polarizer through the second detection element, obtains third image information of the first surface of the second polarizer through the third detection element, obtains fourth image information of the second surface of the second polarizer through the fourth detection element, and communicates with the first correction device through the first detection unit. The first correction device corrects the pole piece through the first image information obtained by the first detection unit, so that the total amount of coating of the first polarizer and the second polarizer after the pole piece is cut is the same, thereby improving the yield of the battery in the fractionation and capacity division.

[0035] 2. The correction amount of the first correction device in the present invention is c, c = |ab| / 4, which is conducive to achieving the same total coating amount of the first divided electrode piece and the second divided electrode piece after the electrode piece is cut.

[0036] 3. The first deviation-correcting device in the present invention is arranged close to the slitting device, and the arrangement distance between the first deviation-correcting device and the slitting device is L, 0.1m≤L≤1m, which is conducive to achieving real-time deviation correction when the electrode is separated. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0038] Figure 2 For this utility model Figure 1 Schematic diagram of part of the structure;

[0039] Figure 3 This is a schematic diagram of the cutting process of an embodiment of the utility model.

[0040] The meanings of the reference numerals are as follows:

[0041] 10. Incoming material traction assembly, 101. Unwinding roller, 102. First pole piece winding roller, 103. Second pole piece winding roller, 104. Pass roller, 20. Correction assembly, 201. First correction device, 202. Second correction device, 30. Slitting device, 40. Pole piece, 40a. First side of pole piece, 40b. Second side of pole piece, 401. First pole piece, 402. Second pole piece, 50. Visual detection device, 501. First detection element, 502. Second detection element, 503. Third detection element, 504. Fourth detection element, 505. Fifth detection element, 506. Sixth detection element. DETAILED DESCRIPTION

[0042] 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 accompanying drawings in the embodiments of the present invention.

[0043] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0045] See Figure 1-Figure 3 The utility model discloses a pole piece slitting device, comprising: an incoming material traction component 10, the incoming material traction component 10 is used to guide the pole piece 40 to be transported in the processing direction; a correction component 20, the correction component 20 includes a first correction device 201; a slitting device 30, the slitting device 30 is used to slit the pole piece 40 into a first pole piece 401 and a second pole piece 402; a visual detection device 50, the visual detection device 50 includes a first detection unit, the first detection unit includes a first detection element 501, a second detection element 502, a third detection element 503 and a fourth detection element 504, the first detection element 501 is used to obtain a first The first image information of the first surface of the polarizer 401, the second detection element 502 is used to obtain the second image information of the second surface of the first polarizer 401, the third detection element 503 is used to obtain the third image information of the first surface of the second polarizer 402, and the fourth detection element 504 is used to obtain the fourth image information of the second surface of the second polarizer 402; the first detection unit communicates with the first correction device 201, and the first correction device 201 corrects the polarizer 40 through the first image information obtained by the first detection unit; the first image information includes first image information, second image information, third image information and fourth image information.

[0046] It should be noted that both the first detection unit and the first correcting device 201 are provided with a control module. The communication between the first detection unit and the first correcting device 201 means that the first detection unit can feed back the detected first image information to the first correcting device 201 for analysis and correction. The first detection unit and the first correcting device 201 can be directly electrically connected to achieve communication. The first detection unit and the first correcting device 201 can also achieve communication by transmitting and receiving signals. The specific communication method between the two depends on the actual situation and is not limited.

[0047] The utility model obtains the first image information of the first surface of the first polar piece 401 through the first detection element 501, obtains the second image information of the second surface of the first polar piece 401 through the second detection element 502, obtains the third image information of the first surface of the second polar piece 402 through the third detection element 503, obtains the fourth image information of the second surface of the second polar piece 402 through the fourth detection element 504, and communicates with the first correction device 201 through the first detection unit. The first correction device 201 corrects the pole piece 40 through the first image information obtained by the first detection unit, so that the total amount of coating of the first polar piece 401 and the second polar piece 402 after the pole piece 40 is cut is the same, thereby improving the yield of the battery in the fractionation.

[0048] Specifically, the first image information includes the width dimension and defect condition of the first surface of the first polarizing plate 401, the second image information includes the width dimension and defect condition of the second surface of the first polarizing plate 401, the third image information includes the width dimension and defect condition of the first surface of the second polarizing plate 402, and the fourth image information includes the width dimension and defect condition of the second surface of the second polarizing plate 402.

[0049] In an embodiment of the present invention, the first surface of the first polarizer 401 and the second surface of the first polarizer 401 are respectively arranged on opposite sides of the first polarizer 401; the first surface of the second polarizer 402 and the second surface of the second polarizer 402 are respectively arranged on opposite sides of the second polarizer 402.

[0050] Preferably, the first surface of the first polarizer 401 is the front side of the first polarizer 401, and the second surface of the first polarizer 401 is the back side of the first polarizer 401; the first surface of the second polarizer 402 is the front side of the second polarizer 402, and the second surface of the second polarizer 402 is the back side of the second polarizer 402.

[0051] In an embodiment of the present utility model, the first detection element 501 detects that the coating width of the first surface of the first polarizer 401 is A1, the second detection element 502 detects that the coating width of the second surface of the first polarizer 401 is B1, and the total amount of double-sided coating of the first polarizer 401 is a, a=A1+B1; the third detection element 503 detects that the coating width of the first surface of the second polarizer 402 is A2, the fourth detection element 504 detects that the coating width of the second surface of the second polarizer 402 is B2, and the total amount of double-sided coating of the second polarizer 402 is b, b=A2+B2; the correction amount of the first correction device 201 is c, c=|ab| / 4.

[0052] Specifically, the coating width refers to the width of the coating. For example, the coating width of the first surface of the first polarizer 401 refers to the width of the coating on the first surface of the first polarizer 401. The specific type of coating depends on the actual application scenario.

[0053] Specifically, the first correcting device 201 analyzes the first image information obtained by the first detection unit, that is, compares the size of the a value and the b value; if a>b, the correction amount of the first correcting device 201 is (ab) / 4; if a<b, the correction amount of the first correcting device 201 is (ba) / 4; so that the final result is that the total coating width of the first pole piece 401 after cutting is equal to the total coating width of the second pole piece 402, thereby realizing the double-sided closed-loop function of the pole piece 40.

[0054] In the embodiment of the present invention, the first correcting device 201 is arranged close to the slitting device 30, and the arrangement distance between the first correcting device 201 and the slitting device 30 is L, 0.1m≤L≤1m, where m is the unit meter.

[0055] Preferably, d is 0.8 m, which is conducive to achieving 40-minute accurate and timely deviation correction of the pole piece.

[0056] In an embodiment of the present utility model, the incoming material traction assembly 10 also includes a unwinding roller 101, a first polarization piece 401 winding roller 102 and a second polarization piece 402 winding roller 103; the unwinding roller 101 is used to unwind the polarization piece 40; the first polarization piece 401 winding roller 102 is used to wind up the first polarization piece 401; the second polarization piece 402 winding roller 103 is used to wind up the second polarization piece 402.

[0057] In an embodiment of the present utility model, the incoming material traction assembly 10 also includes a roller 104, and at least one roller 104 is provided between the unwinding roller 101 and the first polarizing piece 401 and the winding roller 102, as well as between the unwinding roller 101 and the second polarizing piece 402 and the winding roller 103; the roller 104 is used to tension the pole piece 40, the first polarizing piece 401 and the second polarizing piece 402, which is beneficial to the transportation of the pole piece 40, the first polarizing piece 401 and the second polarizing piece 402.

[0058] In the embodiment of the present invention, the first deviation-correcting device 201 , the slitting device 30 and the first detection unit are sequentially arranged along the processing direction of the pole piece 40 .

[0059] Preferably, the first correcting device 201 includes a correcting platform, and the slitting device 30 includes a slitting knife holder.

[0060] In the embodiment of the present invention, the deviation-correcting assembly 20 further includes a second deviation-correcting device 202 , which is used to perform deviation-correcting on the pole piece 40 during unwinding.

[0061] It should be noted that the first correcting device 201 , the second correcting device 202 and the slitting device 30 can all adopt existing technologies, which will not be described in detail here.

[0062] In an embodiment of the present utility model, the visual detection device 50 also includes a second detection unit, which communicates with the first correction device 201, and the second image information obtained by the second detection unit is fed back to the first correction device 201 to assist the pole piece 40 in correction; the second detection unit includes a fifth detection element 505 and a sixth detection element 506, the fifth detection element 505 is used to obtain the fifth image information of the first surface of the pole piece 40, and the sixth detection element 506 is used to obtain the sixth image information of the second surface of the pole piece 40; the first surface of the pole piece 40 and the second surface of the pole piece are respectively arranged on opposite sides of the pole piece 40; the second image information includes the fifth image information and the sixth image information; the second detection unit, the first correction device 201, the slitting device 30 and the first detection unit are arranged sequentially along the processing direction of the pole piece 40.

[0063] Preferably, the first surface of the pole piece 40 is the front side of the pole piece 40 , and the second surface of the pole piece 40 is the back side of the pole piece 40 .

[0064] It should be noted that the second detection unit is provided with a control module. The communication between the second detection unit and the first correction device 201 means that the second detection unit can feed back the detected second image information to the first correction device 201 for auxiliary analysis and correction action. The second detection unit and the first correction device 201 can be directly electrically connected to achieve communication. The second detection unit and the first correction device 201 can also achieve communication by transmitting and receiving signals. The specific communication method between the two depends on the actual situation and is not limited.

[0065] Specifically, the fifth image information includes the width dimension and defect condition of the first surface of the pole piece 40 , and the sixth image information includes the width dimension and defect condition of the second surface of the pole piece 40 .

[0066] Specifically, the first deviation-correcting device 201 , the second deviation-correcting device 202 and the slitting device 30 may all adopt existing technologies, which will not be described in detail here.

[0067] In the embodiment of the present invention, the first detection element 501, the second detection element 502, the third detection element 503, the fourth detection element 504, the fifth detection element 505 and the sixth detection element 506 are all CCD cameras; how to use CCD cameras to obtain image information can be achieved using existing technology and will not be repeated here.

[0068] The technical means disclosed in the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A pole piece cutting device, characterized in that: include: Incoming material traction assembly, the incoming material traction assembly is used to guide the electrode to be transported in the processing direction; A deviation-correcting assembly, the deviation-correcting assembly comprising a first deviation-correcting device; A slitting device, the slitting device is used to slit the electrode piece into a first divided electrode piece and a second divided electrode piece; A visual detection device, the visual detection device comprising a first detection unit, the first detection unit comprising a first detection element, a second detection element, a third detection element, and a fourth detection element, the first detection element being used to obtain first image information of the first surface of the first polarizer, the second detection element being used to obtain second image information of the second surface of the first polarizer, the third detection element being used to obtain third image information of the first surface of the second polarizer, and the fourth detection element being used to obtain fourth image information of the second surface of the second polarizer; The first detection unit communicates with the first deviation-correcting device, and the first deviation-correcting device corrects the deviation of the pole piece according to the first image information obtained by the first detection unit; The first image information includes the first image information, the second image information, the third image information, and the fourth image information.

2. The electrode slitting equipment according to claim 1, characterized in that: The first surface of the first polarizer and the second surface of the first polarizer are respectively arranged on two opposite surfaces of the first polarizer; The first surface of the second polarization piece and the second surface of the second polarization piece are respectively arranged on two opposite surfaces of the second polarization piece.

3. The electrode slitting equipment according to claim 1, characterized in that: The first detection element detects that the coating width on the first surface of the first polarizer is A1, and the second detection element detects that the coating width on the second surface of the first polarizer is B1. The total amount of coating on both sides of the first polarizer is a, a=A1+B1; The third detection element detects that the coating width on the first surface of the second polarizer is A2, and the fourth detection element detects that the coating width on the second surface of the second polarizer is B2. The total amount of coating on both sides of the second polarizer is b, where b=A2+B2; The correction amount of the first correction device is c, c=|ab| / 4.

4. The electrode slitting equipment according to claim 1, characterized in that: The first correcting device is arranged close to the slitting device, and the arrangement distance between the first correcting device and the slitting device is L, 0.1m≤L≤1m, where m is a unit of meter.

5. The electrode slitting equipment according to claim 1, characterized in that: The incoming material traction assembly further includes a reeling roller, a first polarization sheet reeling roller, and a second polarization sheet reeling roller; The unwinding roller is used to unwind the pole piece; The first polarization sheet winding roller is used to wind up the first polarization sheet; The second polarization sheet winding roller is used for winding up the second polarization sheet.

6. The electrode slitting equipment according to claim 5, characterized in that: The incoming material traction assembly further includes a passing roller, and at least one passing roller is provided between the unwinding roller and the first polarization sheet winding roller and between the unwinding roller and the second polarization sheet winding roller.

7. The electrode slitting device according to any one of claims 1 to 6, characterized in that: The first deviation-correcting device, the slitting device and the first detection unit are sequentially arranged along the processing direction of the pole piece.

8. The electrode slitting device according to any one of claims 1 to 6, characterized in that: The correction assembly further includes a second correction device, which is used to correct the unwinding of the pole piece.

9. The electrode slitting device according to any one of claims 1 to 6, characterized in that: The visual inspection device further includes a second inspection unit, the second inspection unit communicates with the first deviation-correcting device, and the second image information acquired by the second inspection unit is fed back to the first deviation-correcting device to assist the pole piece in deviation correction; The second detection unit includes a fifth detection element and a sixth detection element, the fifth detection element is used to obtain fifth image information of the first surface of the pole piece, and the sixth detection element is used to obtain sixth image information of the second surface of the pole piece; The first surface of the pole piece and the second surface of the pole piece are respectively arranged on two opposite sides of the pole piece; The second image information includes the fifth image information and the sixth image information; The second detection unit, the first deviation-correcting device, the slitting device, and the first detection unit are sequentially arranged along the processing direction of the pole piece.

10. The electrode slitting equipment according to claim 9, characterized in that: The first detection element, the second detection element, the third detection element, the fourth detection element, the fifth detection element, and the sixth detection element are all CCD cameras.

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