阅读说明：本技术 一种极耳的加工方法 (Method for processing tab ) 是由 周帅 石金林 娄勇刚 张宝华 陈念 于 2019-10-25 设计创作，主要内容包括：本发明涉及电池极耳的加工技术领域,公开了一种极耳的加工方法,包括以下步骤：S1,准备连续条状的已涂膜的极片；S2,对涂膜的极片进行辊压,并判断极片是否需要分切,若需要则将极片分切成可加工的宽度,若不需要则进行S3,并使得被送入到S3中的极片上的留白区域≥3个,位于极片中部的留白区域的宽度小于极耳的高度的两倍；S3,极片通过纠偏机构和张力机构的纠偏和张紧后,极片材料按设定路线移动；S4,若干个激光发生器启动,每个所述激光发生器上至少带有一激光切割头,激光切割头对极片进行切割,其中相邻的两个极片之间的被切割出的极耳在极片的运行方向上的投影具有重叠。本发明能够提高材料利用率。(The invention relates to the technical field of battery tab processing, and discloses a tab processing method, which comprises the following steps: s1, preparing a continuous strip-shaped coated pole piece; s2, rolling the coated pole piece, judging whether the pole piece needs to be cut, if so, cutting the pole piece into a processable width, if not, carrying out S3, and enabling the number of the left white areas on the pole piece fed into the S3 to be more than or equal to 3, wherein the width of the left white area in the middle of the pole piece is less than twice of the height of the pole lug; s3, after the pole piece is subjected to deviation correction and tensioning by the deviation correction mechanism and the tension mechanism, the pole piece material moves according to a set route; and S4, starting a plurality of laser generators, wherein each laser generator is at least provided with a laser cutting head which cuts the pole pieces, and projections of the cut pole lugs between two adjacent pole pieces in the running direction of the pole pieces are overlapped. The invention can improve the utilization rate of materials.)

1. A method for processing a tab is characterized in that: the method comprises the following steps:

s1, preparing a continuous strip-shaped coated pole piece (1);

s2, rolling the coated pole piece (1), judging whether the pole piece (1) needs to be cut, if so, cutting the pole piece (1) into a processable width, if not, carrying out S3, and enabling the number of the left white areas on the pole piece (1) fed into the S3 to be more than or equal to 3, wherein the width of the left white area in the middle of the pole piece (1) is less than twice of the height of the tab (4);

s3, after the pole piece (1) is subjected to deviation correction and tensioning through the deviation correction mechanism and the tension mechanism, the material of the pole piece (1) moves according to a set route;

s4, starting a plurality of laser generators (2), wherein each laser generator (2) is at least provided with a laser cutting head (3), the laser cutting heads (3) cut the pole pieces (1), and projections of cut tabs (4) between two adjacent pole pieces (1) in the running direction of the pole pieces (1) are overlapped.

2. The method for processing the tab as claimed in claim 1, wherein: a plurality of laser generator (2) are in be the dislocation set, and a plurality of laser generator (2) cut simultaneously on the direction of pole piece (1) operation.

3. The method for processing the tab as claimed in claim 1, wherein: the number of the laser generators (2) is two, one is arranged on the laser generators (2) and the laser cutting heads (3) and the other is arranged on the laser generators (2) and the laser cutting heads (3).

4. The method as claimed in claim 3, wherein: the distance between the two laser cutting heads (3) on the same laser generator (2) is adjustable.

5. The method for processing the tab as claimed in claim 1, wherein: the width of the margin area at the edge of the pole piece (1) in the S3 is equal to the height of the pole ear (4).

Technical Field

The invention relates to the technical field of battery tab processing, in particular to a tab processing method.

Background

The lithium ion battery cell is formed by assembling a positive plate, a negative plate and a separation film in a winding or laminating manner. In the processing of the positive and negative electrode sheets, the tabs are generally formed by cutting the electrode sheets.

At present, the forming mode of the lithium ion battery tab mainly comprises the following steps: a. forming a cutter die for punching or rolling to prepare sheets; b. and (5) preparing the sheet by using a laser cutting mode. The conventional tab forming method generally pre-strips the membrane into a to-be-die-cut pole piece, such as the left part and the right part in fig. 4, and then performs subsequent processing after being cut from the middle dotted line, that is, performs tab forming processing on the to-be-die-cut pole piece. However, the process results in a lot of waste of the base material and a low material utilization rate.

Disclosure of Invention

The invention aims to provide a method for processing a tab, and aims to solve the problem of low material utilization rate.

The technical purpose of the invention is realized by the following technical scheme: a processing method of a pole lug comprises the following steps:

s1, preparing a continuous strip-shaped coated pole piece;

s2, rolling the coated pole piece, judging whether the pole piece needs to be cut, if so, cutting the pole piece into a processable width, if not, carrying out S3, and enabling the number of the left white areas on the pole piece fed into the S3 to be more than or equal to 3, wherein the width of the left white area in the middle of the pole piece is less than twice of the height of the pole lug;

s3, after the pole piece is subjected to deviation correction and tensioning by the deviation correction mechanism and the tension mechanism, the pole piece material moves according to a set route;

and S4, starting a plurality of laser generators, wherein each laser generator is at least provided with a laser cutting head which cuts the pole pieces, and projections of the cut pole lugs between two adjacent pole pieces in the running direction of the pole pieces are overlapped.

The invention is further provided with: a plurality of laser generator is in be the dislocation set in the direction of pole piece operation, and a plurality of laser generator cuts simultaneously.

The invention is further provided with: the number of the laser generators is two, one is arranged on the laser generator and is provided with one laser cutting head, and the other is provided with two laser cutting heads.

The invention is further provided with: the distance between the two laser cutting heads on the same laser generator is adjustable.

The invention is further provided with: the width of the margin area at the edge of the pole piece in the S3 is equal to the height of the pole ear.

The invention has the beneficial effects that: the width of the pole piece used for processing the pole lug can be at least two pole pieces, so that the pre-cutting processing times of the film-coated pole piece are reduced in the step (in the conventional processing method, the width of each pole piece used for processing the pole lug can only be one pole piece, so that the pre-cutting times are equal to the number of the pole pieces used for processing the pole lug minus one), and the processing efficiency is improved. And utilize a plurality of laser cutters to cut simultaneously when the cutting, a plurality of utmost point ears can process simultaneously promptly, further improvement production efficiency.

Simultaneously when carrying out laser cutting to the pole piece, the marginal margin region can normally cut out utmost point ear, but when cutting utmost point ear to the margin region that is located the pole piece mid portion, utmost point ear on two adjacent pole pieces has the overlap in pole piece traffic direction's projection, the regional width of staying white of mid portion is less than the sum of two utmost point ear heights promptly, but the height of an utmost point ear of more than or equal to again simultaneously (the utmost point ear of the middle part of staying white is dislocation state and cuts), so alright reduce the waste material volume after the cutting is accomplished, the high-usage of material.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of a part of a structure of an embodiment in a processing process in a tab processing method according to the present invention;

fig. 2 is a schematic structural diagram of an embodiment of a pole piece and a tab in a processing method of the tab of the invention;

fig. 3 is a schematic structural diagram of an embodiment of a laser generator with three laser cutting heads in the method for processing a tab of the present invention;

fig. 4 is a schematic structural diagram of a pole piece and a pole tab in a pole tab processing method in the prior art.

In the figure, 1, a pole piece; 2. a laser generator; 3. a laser cutting head; 4. and (7) a tab.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.

A method for processing a tab, as shown in fig. 1 to 4, includes the following steps:

s1, preparing a continuous strip-shaped coated pole piece 1, wherein the shaded part in the figure is an active substance, and the white part is a left white area;

s2, rolling the coated pole piece 1, judging whether the pole piece 1 needs to be cut, if so, cutting the pole piece 1 into a processable width, if not, carrying out S3, and enabling the number of the left white areas on the pole piece 1 sent into the S3 to be more than or equal to 3, preferably three in the embodiment, wherein the width of the left white area in the middle of the pole piece 1 is less than twice of the height of the tab 4;

s3, after the pole piece 1 is subjected to deviation correction and tensioning through the deviation correction mechanism and the tension mechanism, the pole piece 1 material moves according to a set route;

s4, starting a plurality of laser generators 2, wherein each laser generator 2 is at least provided with a laser cutting head 3, the laser cutting heads 3 cut the pole pieces 1, and projections of the cut pole lugs 4 between two adjacent pole pieces 1 in the running direction of the pole pieces 1 are overlapped.

A plurality of laser generator 2 is in be the dislocation set in the direction of 1 operation of pole piece, and a plurality of laser generator 2 cuts simultaneously.

The number of the laser generators 2 is two, one is arranged on the laser generator 2 and is provided with one laser cutting head 3, and the other is arranged on the laser generator 2 and is provided with two laser cutting heads 3. The distance between the two laser cutting heads 3 on the same laser generator 2 is adjustable.

The width of the margin area at the edge of the pole piece 1 in the step S3 is equal to the height of the tab 4.

According to the method for processing the pole lug, at least two pole pieces 1 can be processed according to the width of the pole piece 1 used for processing the pole lug 4, so that the pre-cutting processing frequency of the film-coated pole piece 1 is reduced in the step (in a conventional processing method, the width of each pole piece 1 used for processing the pole lug 4 can only be processed according to the width of one pole piece 1, and the pole pieces 1 are cut into two parts by a middle vertical line part in a figure 3 and then are respectively processed subsequently, so that the pre-cutting frequency is equal to the number of the pole pieces 1 used for processing the pole lug 4 minus one), and the processing efficiency is improved. And a plurality of laser cutters are used for cutting at the same time during cutting, namely a plurality of tabs 4 can be processed at the same time, and the production efficiency is further improved.

Simultaneously when carrying out laser cutting to pole piece 1, the marginal margin region can normally cut out utmost point ear 4, but when cutting utmost point ear 4 to the margin region that lies in pole piece 1 mid portion, utmost point ear 4 on two adjacent pole pieces 1 has the overlap in the projection of 1 traffic direction of pole piece, the regional width of remaining margin of mid portion is less than the sum of two utmost point ears 4 height promptly, but the height of more than or equal to one utmost point ear 4 of while again (the utmost point ear 4 of the middle portion of remaining margin is dislocation state and cuts), so alright reduce the waste material volume after the cutting is accomplished, the high-usage of material.

The two laser generators 2 are staggered, so that the two laser generators 2 can perform cutting processing simultaneously, and the cutting efficiency is further improved; meanwhile, two laser cutting heads 3 are arranged on one laser generator 2, so that when the lugs 4 are cut on two sides of the same pole piece 1, the lugs 4 on two sides of the pole piece 1 can be synchronously processed by controlling the opening and closing of the two laser cutting heads 3 through programs.

Specifically, when the tab a and the tab b in fig. 1 are cut, if the two laser cutting heads x and y are respectively right opposite to the upper right corner of the tab a and the upper right corner of the tab b, the laser generator 2 is translated leftwards, and in the process, the two laser cutting heads 3 both emit laser to cut until the upper left corner of the tab a and the upper left corner of the tab b are cut;

then the left laser cutting head 3 continues to cut, the right laser cutting head 3 stops emitting laser, the laser generator 2 moves downwards or the pole piece 1 moves upwards integrally (if the width of the left blank area is equal to the height of the pole lug 4, the left laser cutting head 3 also stops cutting in the process) until the two laser cutting heads 3 are respectively opposite to the lower left corner of the pole lug a and the lower left corner of the pole lug b;

then the laser generator 2 translates to the right, and in the process, the two laser cutting heads 3 both emit laser to cut until the lower right corner of the tab a and the lower right corner of the tab b are cut;

then the laser cutting head x on the left side stops emitting laser, the laser cutting head y on the right side continues emitting laser, and the laser generator 2 moves upwards or the pole piece 1 moves downwards integrally until the two laser cutting heads 3 respectively reach the upper right corner of the pole lug a and the upper right corner of the pole lug b. Wherein, the laser emission and the stop of the laser cutting head 3 in the above four steps are automatically controlled by the controller.

When cutting the parts below the polar lug a and the polar lug b, namely the parts c on two sides of the active material, the cutting can be respectively carried out through two laser cutting heads x and y, and a third laser cutting head z can be arranged at the same time, wherein the laser cutting head z and the laser cutting head y are positioned at the same horizontal height, the distance between the y and the z is equal to the height of one polar lug 4, the horizontal distance between the laser cutting heads x and z is equal to the shadow part in the figure, namely the width of the part coated with the active material, at the moment, only the laser cutting heads x and z carry out cutting when cutting the part c, and the y stops cutting (otherwise, the polar lug 4 on the adjacent polar piece 1 can be cut). When three sides or two sides of the lug a and the lug b are cut, the laser cutting head z is in a standby state, and then when vertical cutting is carried out, the laser cutting head z and the laser cutting head x cut two sides of a shadow part in a figure downwards at the same time.

Furthermore, if the width of the middle margin area is equal to the height of the tab 4, this can further reduce the total length to be cut, since the left side of the tab 4 on the right side shadow portion is also cut when the laser cutting head z cuts downward. Simultaneously, the positions of the three laser cutting heads 3 on the laser generator 2 can be adjusted, so that the different sizes of the lugs 4 and the different widths of the pole pieces 1 (namely shadow parts) coated with active substances can be processed, and the application range is wider.

And it should be understood that two or three laser cutting heads 3 may be provided on all the laser generators 2, and there may be multiple sets of pole pieces 1 to be cut simultaneously, and when there are multiple sets, it is preferable that the number of laser generators 2 is equal to the number of sets of pole pieces 1 to be processed.

In a further embodiment, a movable arm structure (e.g. a conventional mechanical arm) is provided, and then three laser generators 2 are provided on the movable arm, wherein the three laser generators 2 can be adjusted in position on the movable arm, i.e. the distance and position between the laser generator 2 and the laser cutting head 3 can be adjusted, so as to adapt to different pole pieces 2 and pole lugs 4.

It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.

The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.