阅读说明：本技术 一种卷绕极耳错位调节方法及控制系统 (Winding tab dislocation adjusting method and control system ) 是由 林华 朱有治 张万财 于 2021-07-27 设计创作，主要内容包括：本发明公开了一种卷绕极耳错位调节方法及控制系统,该方法包括：根据卷针的线速度以及所检测到的极耳的前端与尾端之间的时间,计算出极耳错位量；根据极耳错位量,调节贴胶辊在卷绕方向上施加的压力；以及根据下料后检测出的极耳错位量,修正所述贴胶辊在卷绕方向上施加的压力。因此,本发明对极耳的错位控制不局限在极片走带过程中的极片厚度方向控制,还增加了卷绕贴胶时的极片长度方向压力控制调节作用,从而实现对走带过程中控制不佳的电芯错位的调节,并提高了工序良率。(The invention discloses a winding tab dislocation adjusting method and a control system, wherein the method comprises the following steps: calculating the tab dislocation according to the linear velocity of the winding needle and the detected time between the front end and the tail end of the tab; adjusting the pressure applied by the rubberizing roller in the winding direction according to the tab dislocation amount; and correcting the pressure applied by the rubberizing roller in the winding direction according to the tab dislocation amount detected after blanking. Therefore, the dislocation control of the electrode lugs is not limited to the control of the thickness direction of the pole piece in the process of pole piece tape transport, and the pressure control and adjustment function of the length direction of the pole piece in the process of winding and rubberizing is added, so that the adjustment of the dislocation of the battery cell which is not well controlled in the tape transport process is realized, and the process yield is improved.)

1. A dislocation adjusting method for a winding tab is characterized by comprising the following steps:

calculating the tab dislocation according to the linear velocity of the winding needle and the detected time between the front end and the tail end of the tab;

adjusting the pressure applied by the rubberizing roller in the winding direction according to the tab dislocation amount; and correcting the pressure applied by the rubberizing roller in the winding direction according to the tab dislocation amount detected after blanking.

2. The method as claimed in claim 1, wherein the leading and trailing ends of the tab are detected by image detection or photoelectric detection.

3. The method of adjusting the misalignment of wound tabs as in claim 1 wherein an electrical proportional valve is used to control the pressure applied by the applicator roll in the winding direction.

4. The method for adjusting the dislocation of the wound tab as claimed in any one of claims 1 to 3, wherein if the tab is dislocated towards the rotation direction of the winding needle, the pressure applied by the rubberizing rollers is reduced; and if the lug is dislocated towards the opposite direction of the rotation of the winding needle, the pressure applied by the rubberizing roller is increased.

5. A control system for adjusting dislocation of a winding tab is characterized by comprising:

the detection recording module is used for detecting the front end and the tail end of the tab and recording the time point when the front end and the tail end of the tab are detected to correspond to each other;

the calculation module is used for calculating the tab dislocation quantity according to the linear speed of the winding needle and the detected time between the front end and the tail end of the tab;

the electric proportional valve is used for realizing the adjustment of the pressure applied by the rubberizing roller in the winding direction;

and the pressure control module is used for adjusting or correcting the pressure applied by the rubberizing roller in the winding direction according to the tab dislocation amount.

6. The wound tab misalignment adjustment control system of claim 5, wherein the pressure control module is configured to adjust or correct the pressure applied by the rubberizing rollers in the winding direction according to the misalignment direction of the tab; if the tab is staggered towards the rotation direction of the winding needle, the pressure applied by the rubberizing roller is reduced; and if the lug is dislocated towards the opposite direction of the rotation of the winding needle, the pressure applied by the rubberizing roller is increased.

7. The wound tab misalignment adjustment control system of claim 6, wherein the detection and recording module comprises an image acquisition unit or a photoelectric detection unit.

Technical Field

The invention relates to the technical field of energy storage device manufacturing, in particular to a winding tab dislocation adjusting method and a control system.

Background

At present, for the electrode assembly with more winding turns, the dislocation control of the tabs is the more difficult part in the winding process. Due to the structure of the winding machine, the embossing roller and the winding unit are at a certain distance, so that the head length of the first battery cell after material changing cannot be controlled by the embossing roller, the dislocation quantity of the battery cell tabs after material changing is large, the situation of scrapping often occurs, and the high-quality rate loss of the winding process is caused. Moreover, because the relation between the dislocation amount of the pole lug and the thickness of the pole piece is complex, the pressure is adjusted by the embossing roller in the tape-moving process of the pole piece to control the dislocation amount of the pole lug, the method is effective but not ideal enough, and the alignment degree of the pole lug has certain deviation.

Therefore, it is necessary to design a tab misalignment amount adjustment scheme with high yield.

Disclosure of Invention

The invention aims to: provides a dislocation adjusting method for a winding tab with high yield.

In order to achieve the purpose, the invention provides the following technical scheme:

a rolled tab dislocation adjusting method comprises the following steps:

calculating the tab dislocation according to the linear velocity of the winding needle and the detected time between the front end and the tail end of the tab;

adjusting the pressure applied by the rubberizing roller in the winding direction according to the tab dislocation amount; and correcting the pressure applied by the rubberizing roller in the winding direction according to the tab dislocation amount detected after blanking.

According to a specific implementation mode, the rolled tab dislocation adjusting method adopts an image detection or photoelectric detection mode to detect the front end and the tail end of the tab.

According to a specific implementation mode, the winding tab dislocation adjusting method adopts an electric proportional valve to control the pressure applied by the rubberizing rollers in the winding direction.

According to a specific implementation mode, in the winding tab dislocation adjusting method, if the tab is dislocated towards the rotation direction of the winding needle, the pressure applied by the rubberizing rollers is reduced; and if the lug is dislocated towards the opposite direction of the rotation of the winding needle, the pressure applied by the rubberizing roller is increased.

In another aspect of the present invention, there is also provided a rolled tab misalignment adjustment control system, which includes:

the detection recording module is used for detecting the front end and the tail end of the tab and recording the time point when the front end and the tail end of the tab are detected to correspond to each other;

the calculation module is used for calculating the tab dislocation quantity according to the linear speed of the winding needle and the detected time between the front end and the tail end of the tab;

the electric proportional valve is used for realizing the adjustment of the pressure applied by the rubberizing roller in the winding direction;

and the pressure control module is used for adjusting or correcting the pressure applied by the rubberizing roller in the winding direction according to the tab dislocation amount.

According to a specific implementation mode, in the winding tab dislocation adjusting control system, the pressure control module is used for adjusting or correcting the pressure applied by the rubberizing roller in the winding direction according to the dislocation direction of the tab; if the tab is staggered towards the rotation direction of the winding needle, the pressure applied by the rubberizing roller is reduced; if the tab is dislocated towards the opposite direction of the rotation of the winding needle, the pressure applied by the rubberizing roller is increased

According to a specific implementation mode, the winding tab dislocation adjusting control system comprises an image acquisition unit or a photoelectric detection unit.

In summary, compared with the prior art, the invention has the beneficial effects that:

according to the method for adjusting the dislocation of the wound tab, the dislocation control of the tab is not limited to the control of the thickness direction of the pole piece in the process of tape transport of the pole piece, and the adjustment of the dislocation of the battery cell which is not well controlled in the tape transport process is realized by increasing the pressure control and adjustment effect of the length direction of the pole piece in the process of tape winding and rubberizing, so that the process yield is improved.

Description of the drawings:

fig. 1 is a schematic view of a winding dislocation direction of a tab;

FIG. 2 is a schematic flow diagram of the process of the present invention;

FIG. 3 is a schematic diagram of the system of the present invention.

Detailed Description

The invention is described in further detail below with reference to the figures and the embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.

The invention discloses a dislocation adjusting method of a winding tab, which comprises the following steps:

calculating the tab dislocation according to the linear velocity of the winding needle and the detected time between the front end and the tail end of the tab;

adjusting the pressure applied by the rubberizing roller in the winding direction according to the tab dislocation amount; and correcting the pressure applied by the rubberizing roller in the winding direction according to the tab dislocation amount detected after blanking.

Specifically, the method for adjusting the dislocation of the wound tab adopts an image detection or photoelectric detection mode to detect the front end and the tail end of the tab. Meanwhile, the pressure applied by the rubberizing roller in the winding direction is controlled by an electric proportional valve.

In the dislocation adjusting method for the wound tab, if the tab is dislocated towards the rotation direction of the winding needle, the pressure applied by the rubberizing roller is reduced; and if the lug is dislocated towards the opposite direction of the rotation of the winding needle, the pressure applied by the rubberizing roller is increased.

In the implementation, the equipment takes 0.3Mpa pressure as a reference, the dislocation quantity is positive, which indicates that the tab is dislocated towards the rotation direction of the winding needle, and the dislocation quantity is negative, which indicates that the tab is dislocated towards the reverse direction of the rotation of the winding needle. As shown in fig. 1, the position of the first tab J1 is usually determined to have no error with the position of the first tab in a standard battery, and when winding, the second tab J2 is misaligned toward the rotation direction of the winding pin, and the third tab J3 is misaligned toward the opposite direction of the rotation direction of the winding pin.

As shown in table 1, when the single detection dislocation is in a direction of dislocation toward the rotation direction of the winding needle, the air pressure is reduced, and when the single detection dislocation is in a direction of dislocation toward the opposite direction of the rotation direction of the winding needle, the pressure is increased; when tested, 0.1MPa affected dislocation was about 2 mm.

Table 1: corresponding relation between dislocation amount and pressure applied to rubberizing roller in winding direction

Amount of misalignment	-4	-2	0	2	4	Unit mm
							Air pressure	0.5	0.4	0.3	0.2	0.1	Unit Mpa

As shown in fig. 1, the method for adjusting the dislocation of the wound tab of the present invention comprises the following steps:

s101: and when the winding of the final tab is finished, detecting and calculating the magnitude and the dislocation direction of the dislocation quantity. Namely, the pole lug dislocation data during winding is calculated by acquiring the pole lug position information of the last pole lug collected at the position of the winding needle

S102: and when the dislocation quantity indicated by the tab dislocation data during winding is larger than the requirement of the product, adjusting the pressure applied by the rubberizing roller in the winding direction, otherwise, not adjusting the pressure applied by the rubberizing roller in the winding direction.

S103: if the lug dislocation data indicate that the dislocation direction faces the winding direction, reducing the pressure applied by the rubberizing roller; otherwise, the pressure applied by the rubberizing roller is increased. Therefore, the dislocation size is corrected by adjusting the pressure applied by the rubberizing roller.

S104: and detecting the magnitude and the dislocation direction of the dislocation quantity after blanking.

S105: and when the dislocation quantity indicated by the lug dislocation data detected after blanking is greater than the requirement of the product, correcting the pressure applied by the rubberizing roller in the winding direction, otherwise, not correcting the pressure applied by the rubberizing roller in the winding direction.

S106: if the lug dislocation data indicate that the dislocation direction faces the winding direction, reducing the pressure applied by the rubberizing roller; otherwise, the pressure applied by the rubberizing roller is increased. Therefore, the dislocation size is corrected by adjusting the pressure applied by the rubberizing roller.

As shown in fig. 2, the wound tab misalignment adjustment control system of the present invention comprises:

the detection recording module 101 is used for collecting tab position information at the position of the winding needle;

the calculating module 102 is configured to calculate tab dislocation data during winding according to the tab position information;

the electric proportional valve 103 is used for adjusting the pressure applied by the rubberizing roller in the winding direction;

and the pressure control module 104 is used for adjusting or correcting the pressure applied by the rubberizing rollers in the winding direction according to the tab dislocation amount. Specifically, the pressure applied by the rubberizing roller in the winding direction is adjusted or corrected according to the dislocation direction of the tabs; if the tab is staggered towards the rotation direction of the winding needle, the pressure applied by the rubberizing roller is reduced; and if the lug is dislocated towards the opposite direction of the rotation of the winding needle, the pressure applied by the rubberizing roller is increased.

In the system for adjusting and controlling the dislocation of the wound tab, the detection and recording module 101 comprises an image acquisition unit or a photoelectric detection unit.

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 invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.