Flag forming device after laser notching of secondary batteries for electric vehicles

Abstract

The present invention relates to a flag forming device after laser notching of a secondary battery for an electric vehicle, and particularly, to a flag forming device after laser notching of a secondary battery for an electric vehicle configured by stacking electrode rolls within a circular box, which makes a flag shape by notching an uncoated portion having no coating of a negative electrode and a positive electrode with a laser, and makes the uncoated flag made by laser notching pass through a flag forming unit before winding to enable an uncoated tap to be folded inward. The present invention includes a flag forming device after laser notching of a secondary battery for an electric vehicle of the present invention including a tilt EPC unit 1 which moves a pole plate while maintaining a material uniformly and constantly at a setting value of an EPC sensor when the pole plate is moved, the EPC sensor 2 which numerically indicates the degree of distortion when the pole plate is moved through the tilt EPC unit 1, a flag forming unit 3 which molds a flag of the pole plate moved through the EPC sensor 2, an encoder roller 4 which measures a movement distance of the pole plate passing through the flag forming unit 3, a winding unit 5 which winds an electrode that has passed through the flag forming unit 3, and an air nozzle 6 which blows air before an uncoated flag is wound in the winding unit 5 to enable an uncoated tab to be folded inward.

Claims

1. A flag forming device after laser notching of a secondary battery for an electric vehicle, the flag forming device comprising: a tilt EPC unit configured to move a pole plate while maintaining a material uniformly and constantly at a setting value of an EPC sensor when the pole plate is moved; the EPC sensor configured to numerically indicate the degree of distortion when the pole plate is moved through the tilt EPC unit; a flag forming unit configured to mold a flag of the pole plate moved through the EPC sensor; an encoder roller configured to measure a movement distance of the pole plate passing through the flag forming unit; a winding unit configured to wind an electrode passing that has passed through the flag forming unit; and an air nozzle configured to blow air before an uncoated flag is wound in the winding unit to enable an uncoated tab to be folded inward.

2. The flag forming device of claim 1, wherein the flag forming unit includes: one pair of forming rollers for passing an electrode from top to bottom; an LM guide for preventing a roller from being curved during adjustment; a tension spring for preventing a foaming roller from being damaged and maintaining tension; a cross roller table for reinforcing shaking of a front portion in a lower portion of the forming roller; a micro head for precise adjustment; and a motor for mutually rotating the forming roller and controlling synchronization of an encoder.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a diagram illustrating a flag forming unit in a winding device of the present invention.

(2) FIG. 2 is a perspective view of a flag forming unit after laser notching of a circular secondary battery of the present invention.

(3) FIG. 3A is a picture of an actual product in the case where flag forming is not performed, and FIG. 3B is a picture of an actual product in the case where flag forming is performed.

DETAILED DESCRIPTION

(4) Hereinafter, an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

(5) FIG. 1 is a diagram illustrating a flag forming unit in a winding device of the present invention, and a flag forming device after laser notching of a secondary battery for an electric vehicle of the present invention includes a tilt EPC unit 1 which moves a pole plate while maintaining a material uniformly and constantly at a setting value of an EPC sensor when the pole plate is moved, the EPC sensor 2 which numerically indicates the degree of distortion when the pole plate is moved through the tilt EPC unit 1, a flag forming unit 3 which molds a flag of the pole plate moved through the EPC sensor 2, an encoder roller 4 which measures a movement distance of the pole plate passing through the flag forming unit 3, a winding unit 5 which winds an electrode that has passed through the flag forming unit 3, and an air nozzle 6 which blows air before an uncoated flag is wound in the winding unit 5 to enable an uncoated tab to be folded inward.

(6) FIG. 2 is a perspective view of the flag forming unit 3 of the present invention, and includes one pair of forming rollers 7 for passing the electrode from top to bottom, an LM guide 8 for preventing a roller from being curved during adjustment, a tension spring 9 for preventing the foaming roller 7 from being damaged and maintaining tension, a cross roller table 10 for reinforcing the shaking of a front portion in a lower portion of the forming roller 7, a micro head 11 for precise adjustment, and a motor 12 for mutually rotating the forming roller 5 and controlling synchronization of an encoder.

(7) The operation of the present invention formed as described above will be described.

(8) A circular secondary battery for an electric vehicle is made by making a flag shape by processing an uncoated portion having coating of a negative electrode and a positive electrode with a laser, folding the flag shape, and welding a terminal on the flag shape, and the folding of the flag before winding the secondary battery in this way is called flag forming.

(9) Further, the process of making the flag by processing with a laser is called notching, and the uncoated flag made by laser notching passes through the flag forming unit 3 illustrated in FIG. 1 before winding and an uncoated tap is folded inward by air of the air nozzle 6 and moves toward the winding side.

(10) In this case, when the tap of the uncoated portion in the wound jelly roll is viewed, the flag is wound while being folded in the form illustrated in FIG. 3 and is positioned.

(11) Herein, a forming method without self-driving force is a method in which a roller is attached to make the shape with pressure during winding, and is suitable to continuous winding and is advantageous in terms of costs, but it is preferable that the present invention uses a forming method having self-driving force.

(12) That is, the method of forming with self-driving force is a method of rotating and moving the forming roller 7 by driving of the motor 12 without attachment of the electrode during winding, and is advantageous for high-speed winding and synchronizes an electrode movement and a winding speed while driving the electrode movement to improve quality, to move the forming roller in the winding direction.

(13) In the notching processing portion, the electrode film that is a processed product is notching processed at every predetermined pitch for forming an electrode tap by shearing the uncoated portion of the electrode film of the secondary battery, and laser cutting devices located at a right end and a left end of the electrode film cut the electrode film, and in this case, each of the laser cutting device moves in a shape of “” to cut both side ends of the electrode film.

(14) When both side ends of the electrode film rapidly transferred from top to bottom is cut in the shape of “”, the electrode tap is formed at every predetermined pitch of the electrode film.

(15) The uncoated tap of the electrode film is folded inward by blowing air through the air nozzle 6 before the cut electrode film is wound by the winding unit 5, and a flag shape is made by notching the uncoated portion having no coating of a negative electrode and a positive electrode with laser, and the uncoated flag made by laser notching passes through the flag forming unit before being wound, so that the uncoated tap is folded inward.

(16) FIG. 3A is a picture of an actual product in the case where existing flag forming is not performed, and FIG. 3B is a picture of an actual product in the case where flag forming is performed according to the present invention.

(17) The present invention as described above is illustrative of the technical spirit, and those skilled in the art to which the present invention pertains may make various modifications, changes and substitutions within the scope without departing from the essential characteristics of the present invention.

(18) Therefore, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention, but are intended to illustrate the scope of the technical idea of the present invention, and the scope of the present invention is not limited by the embodiment and the accompanying drawings.

(19) The scope of the present invention shall be construed on the basis of the accompanying claims in such a manner that all of the technical ideas included within the scope equivalent to the claims belong to the scope of the present invention.