US-12617642-B2 - Winding apparatus and winding method

US12617642B2US 12617642 B2US12617642 B2US 12617642B2US-12617642-B2

Abstract

Disclosed are a winding apparatus and a winding method, the winding apparatus includes: a winding needle, being configured to wind a winding material; a power supply assembly, being configured to be electrically coupled to the winding needle, so as to form current on an axis of the winding needle; and a magnet supply assembly, being configured to provide a magnetic field to the winding needle, a magnetic field direction intersecting the axis of the winding needle so that the winding needle generates an ampere force for resisting a deformation of the winding needle in the magnetic field when the winding material is wound. By the above method, the present application may reduce the deformation of the winding needle, reduce a defective rate of a winding product formed by the winding of the winding material, and improve quality of the winding product.

Inventors

Linglong Tang
Feng Pan
Wei Zhang
Yuqian WEN

Assignees

CONTEMPORARY AMPEREX TECHNOLOGY (HONG LONG) LIMITED

Dates

Publication Date: 20260505
Application Date: 20230926
Priority Date: 20210830

Claims (11)

1 . A winding apparatus, comprising: a winding needle, being configured to rotate to wind a winding material on the winding needle; a power supply assembly, being configured to be electrically coupled to the winding needle to form current on an axis of the winding needle; and a magnet supply assembly, being configured to provide a magnetic field to the winding needle with a magnetic field direction intersecting the axis of the winding needle so that the winding needle with the current provided from the power supply assembly generates an ampere force for resisting deformation of the winding needle in the magnetic field when the winding material is wound on the winding needle.
2 . The winding apparatus according to claim 1 , wherein the winding apparatus further comprises a controller and a pressure sensor, the pressure sensor is configured to detect a tension of the winding material to the winding needle, and the controller is configured to adjust an intensity of the magnetic field and/or an intensity of the current according to the tension detected by the pressure sensor.
3 . The winding apparatus according to claim 2 , wherein the power supply assembly comprises a current regulator, the current regulator is electrically coupled to the winding needle and the controller, respectively, and the controller adjusts the intensity of the current by controlling the current regulator.
4 . The winding apparatus according to claim 2 , wherein the magnet supply assembly comprises a first excitation coil and a second excitation coil, the first excitation coil and the second excitation coil are provided on two opposite sides of the winding needle; and respective magnetic poles of the first excitation coil and the second excitation coil on sides directed toward the winding needle are opposite magnetic poles; and the controller controls the intensity or the magnetic field direction by adjusting the current of the first excitation coil and/or the second excitation coil.
5 . The winding apparatus according to claim 4 , wherein the first excitation coil and the second excitation coil are provided symmetrically with respect to the axis of the winding needle.
6 . The winding apparatus according to claim 1 , wherein the magnet supply assembly can rotate around the winding needle.
7 . The winding apparatus according to claim 1 , wherein the power supply assembly further comprises a first conductive slip ring and a second conductive slip ring, the first conductive slip ring is socketed on one end of the winding needle, and the second conductive slip ring is socketed on the other end of the winding needle, and wherein the power supply assembly is electrically coupled to the winding needle by the first conductive slip ring and the second conductive slip ring.
8 . The winding apparatus according to claim 1 , wherein the winding apparatus further comprises clamping assemblies and a driving assembly, the clamping assemblies comprise a first clamping assembly and a second clamping assembly, and the first clamping assembly and the second clamping assembly are respectively supported at two ends of the winding needle, at least one of the first clamping assembly and the second clamping assembly is clamped and fixed with the winding needle and is coupled to the driving assembly, so as to drive and lead the winding needle to rotate by the driving assembly.
9 . A winding method, performed by a winding apparatus, the winding apparatus comprising: a winding needle, being configured to wind a winding material on the winding needle; a power supply assembly, being configured to be electrically coupled to the winding needle; and a magnet supply assembly, being configured to provide a magnetic field to the winding needle, and wherein the method comprises: winding a winding material on the winding needle of the winding apparatus by rotating the winding needle; energizing the winding needle, by the power supply assembly, to form current on an axis of the winding needle; and providing a magnetic field, by the magnet supply assembly, to the winding needle with a magnetic field direction intersecting the axis of the winding needle so that the energized winding needle generates an ampere force for resisting deformation of the winding needle in the magnetic field when the winding material is wound on the winding needle.
10 . The winding method according to claim 9 , wherein the method further comprises: when the winding needle rotates, adjusting an intensity of the current according to a tension of the winding material to the winding needle, and/or adjusting an intensity of the magnetic field according to the tension of the winding material to the winding needle.
11 . The winding method according to claim 9 , wherein the method further comprises: when the winding needle rotates, rotating the magnet supply assembly around the winding needle, so as to adjust the magnetic field direction and reduce a resultant force of the tension and the ampere force applied to the winding needle.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS The present application is a continuation of International Application No. PCT/CN2022/101825, filed on Jun. 28, 2022, which claims priority to Chinese Patent Application 202111003970.3, filed on Aug. 30, 2021 and entitled “WINDING APPARATUS AND WINDING METHOD”, the entire content of which is incorporated herein by reference. TECHNICAL FIELD Embodiments of the present application relate to the technical field of battery preparation device, and in particular, to a winding apparatus and a winding method. BACKGROUND A winding-type electrode assembly is widely used in the battery field due to its advantages of stable performance and high production efficiency. In a winding apparatus configured to prepare the winding-type electrode assembly, a main component thereof is a winding needle, the winding needle is configured to wind a winding material of a battery (generally including an electrode sheet and a membrane between the electrode sheet), where a structure and a shape of the winding needle may directly affect the production efficiency of the winding apparatus and the performance of the battery. At present, when the winding material is wound, the winding needle may be deformed due to applying a tension of the winding material, and the more slender the winding needle is, the faster a rotating speed is, and the greater a deformation degree of the winding needle will be. After the winding needle is deforming, the electrode sheet and the membrane in the battery may also be deformed and wrinkled to varying degrees, so as to result a performance degradation of the electrode assembly and a failure to meet the required quality requirements. SUMMARY In view of the above problems, embodiments of the present application provide a winding apparatus and a winding method, so as to reduce a deformation of a winding needle, reduce a defective rate of a winding product formed by the winding of the winding material, and improve quality of the winding product. According to an aspect of an embodiment of the present application, provided is a winding apparatus, including: a winding needle, being configured to wind a winding material; a power supply assembly, being configured to be electrically coupled to the winding needle, so as to form current on an axis of the winding needle; and a magnet supply assembly, being configured to provide a magnetic field to the winding needle, a magnetic field direction intersecting the axis of the winding needle so that the winding needle generates an ampere force for resisting deformation of the winding needle in the magnetic field when the winding material is wound. The winding apparatus in an embodiment of the present application, when being wound, according to a size and a tension direction of the winding material to the winding needle, the magnetic field is provided to the winding needle by the magnet supply assembly, and the current is provided to the winding needle by the power supply assembly, so that the ampere force applied to an energized winding needle in the magnetic field may offset part or all tension of the winding material to the winding needle. Compared with a traditional winding device, this method reduces the deformation of the winding needle, reduce a defective rate of a winding product formed by the winding of the winding material, and improve quality of the winding product. At the same time, a size of an axial direction of the winding needle may be made larger, a size of a radial direction may be made smaller, and an overall structure is more slender. In an optional manner, the winding apparatus further includes a controller and a pressure sensor, the pressure sensor is configured to detect a tension of the winding material to the winding needle, and the controller is configured to adjust an intensity of the magnetic field and/or an intensity of the current according to the tension detected by the pressure sensor. An embodiment of the present application monitors the tension of the winding needle applied by the winding material in real time by providing the pressure sensor, so that the controller may adjust the intensity of the magnetic field and/or adjust the intensity of the current passing through the winding needle according to the tension detected by the pressure sensor, so as to realize an automatic adjustment of the ampere force applied to the winding needle in the magnetic field, reduce the deformation of the winding needle, and make adjustment and control more accurate and reliable. In an optional manner, the power supply assembly includes a current regulator, the current regulator is electrically coupled to the winding needle and the controller, respectively, and the controller adjusts the intensity of the current by controlling the current regulator. In a present embodiment, the controller may automatically adjust the current passing through the winding needle in real time by controlling the current regulator, the control is