CN-118777629-B - Method for detecting running state of embossing roller, pole piece embossing device and winding equipment

CN118777629BCN 118777629 BCN118777629 BCN 118777629BCN-118777629-B

Abstract

The application relates to the technical field of battery manufacturing, and provides a method for detecting the running state of an embossing roller, a pole piece embossing device and winding equipment. The method for detecting the running state of the embossing roller comprises the steps of obtaining the linear speed of the roller surface of the embossing roller, obtaining the winding speed of a pole piece, and determining that the running of the embossing roller is abnormal according to the fact that the absolute value of the difference value between the linear speed and the winding speed is larger than a first preset threshold value. By the technical scheme, the running state of the embossing roller can be detected in time, and the embossing roller can be found and maintained in time conveniently, so that risks of poor embossing, breakage and the like of the pole piece are reduced.

Inventors

XING QINGFENG
YANG YOUJIE
WU SHUWEN
WU KAI

Assignees

宁德时代新能源科技股份有限公司

Dates

Publication Date: 20260505
Application Date: 20240906

Claims (4)

1. The method for detecting the running state of the embossing roller comprises arranging the embossing roller on a pole piece embossing device, driving rollers in transmission connection with the embossing roller and driving pieces, the driving piece is directly connected with the driving roller, and the embossing roller is used for embossing the pole piece in cooperation with the driving roller, and the method for detecting the running state of the embossing roller is characterized by comprising the following steps of: acquiring the angular displacement of the embossing roller within a preset time; Calculating the actual embossing length of the embossing roller according to the angular displacement and the radius of the embossing roller; Acquiring the linear speed of the roller surface of the embossing roller; acquiring the winding speed of the pole piece; and determining that the operation of the embossing roller is abnormal according to the fact that the absolute value of the difference value between the actual embossing length and the theoretical embossing length is larger than a second preset threshold value and the absolute value of the difference value between the linear speed and the winding speed is larger than a first preset threshold value.
2. The method of detecting an operational state of an embossing roll of claim 1, further comprising: And determining that the embossing roller runs normally according to the fact that the absolute value of the difference value between the actual embossing length and the theoretical embossing length is not greater than the second preset threshold value and the absolute value of the difference value between the linear speed of the embossing roller and the winding speed is not greater than the first preset threshold value.
3. The method of detecting an operational state of an embossing roll according to claim 1, wherein the acquiring a linear speed of the embossing roll operation comprises: Acquiring the radius of the embossing roller; and calculating the linear speed of the embossing roller according to the product of the radius of the embossing roller and the rotational angular speed of the embossing roller.
4. A method of detecting the operational status of an embossing roll according to any one of claims 1-3, further comprising: and controlling an alarm to give an alarm according to the abnormal operation of the embossing roller, and controlling the pole piece embossing device to stop operating.

Description

Method for detecting running state of embossing roller, pole piece embossing device and winding equipment Technical Field The application relates to the technical field of battery manufacturing, in particular to a method for detecting the running state of an embossing roller, a pole piece embossing device and winding equipment. Background This section provides merely background information related to the present disclosure and is not necessarily prior art. In the battery manufacturing process, pole piece embossing is an important step in the winding process. However, the embossing roller of the current pole piece embossing device may cause abnormal conditions such as slipping or clamping stagnation and the like of the embossing roller and the pole piece due to long-time rolling abrasion and the like, so that the problems such as poor embossing and breakage of the pole piece are caused. Therefore, how to detect whether there is an abnormality in the embossing roller pressing process is a problem to be solved. Disclosure of Invention The application aims to provide a method for detecting the running state of an embossing roller, a pole piece embossing device and winding equipment, which are used for detecting the running state of the embossing roller in real time and reducing the occurrence of poor embossing, breakage and the like of the pole piece. The aim is achieved by the following technical scheme: In a first aspect, the application provides a method for detecting an operation state of an embossing roller, wherein the embossing roller is arranged on a pole piece embossing device and used for embossing a pole piece, the method for detecting the operation state of the embossing roller comprises the steps of obtaining a linear speed of a roller surface of the embossing roller, obtaining a winding speed of the pole piece, and determining that the operation of the embossing roller is abnormal according to the fact that an absolute value of a difference value between the linear speed and the winding speed is larger than a first preset threshold value. According to the method for detecting the running state of the embossing roller, when the pole piece embossing device runs, the linear speed of the running of the embossing roller is obtained, namely the speed of the roller surface of the embossing roller when the pole piece is rolled, then the winding speed of the pole piece is obtained, whether the absolute value of the difference value between the speed of the embossing roller rolling the pole piece and the winding speed of the pole piece is larger than the first preset threshold value or not is judged through analysis, the first preset threshold value can be any value in the range of 1.2 mm/s-2 mm/s, for example, the first preset threshold value is set to be 1.2mm/s, when the winding speed of the pole piece is 2000mm/s, if the obtained linear speed of the roller surface of the embossing roller is any value in the range of 1996 mm/s-1998 mm/s, the running of the embossing roller is judged to have abnormal conditions, and accordingly data reference can be provided for operators through replacing or maintaining the embossing roller so that the occurrence of the embossing failure or fracture of the pole piece can be reduced. In addition, the method for detecting the running state of the embossing roller provided by the application can also have the following additional technical characteristics: In some embodiments of the application, the obtaining the linear velocity of the embossing roller comprises obtaining the radius of the embossing roller and calculating the linear velocity of the embossing roller according to the product of the radius of the embossing roller and the angular velocity of the embossing roller. The linear velocity refers to a velocity at which any point on the embossing roll moves circumferentially around the axial direction thereof, and the rolling surface of the embossing roll is a circumferential surface, and the embossing roll moves circumferentially, so that the linear velocity of the embossing roll can be calculated by multiplying the radius of the embossing roll by the angular velocity at which the embossing roll rotates. In some embodiments of the application, the method further comprises determining that the embossing roll is operating properly based on the absolute value of the difference between the linear speed of the embossing roll and the winding speed being no greater than the preset speed threshold. When the absolute value of the difference between the linear speed of the embossing roller and the winding speed of the pole piece is smaller than or equal to a first preset threshold, wherein the first preset threshold can be set to any value within the range of 1.2 mm/s-2 mm/s, for example, the first preset threshold is set to 1.2mm/s, when the winding speed of the pole piece is 2000mm/s, the linear speed of the roller surface of the embossing roller is 1999 mm/s, and the differe