Apparatus and method for manufacturing cable-type secondary battery and cable-type secondary battery manufactured by the same

Patent metadata

Field	Value
Publication number	US-10615458-B2
Application number	US-201715765932-A
Country	US
Kind code	B2
Filing date	Jan 9, 2017
Priority date	Jan 7, 2016
Publication date	Apr 7, 2020
Grant date	Apr 7, 2020

Abstract

Disclosed is a method for manufacturing a cable-type secondary battery, which includes successively supplying a first electrode member, a separator ribbon and a second electrode member around a rod-shaped winding core, wherein a width of the first electrode member and a width of the second electrode member are respectively smaller than a winding circumference, and a width of the separator ribbon is greater than the winding circumference.

First claim

What is claimed is:

1. An apparatus for manufacturing a cable-type secondary battery, comprising:
a rod-shaped winding core; and
a battery element supply unit having a first electrode bobbin configured to successively supply a first electrode member, a separator bobbin configured to successively supply a separator ribbon, and a second electrode bobbin configured to successively supply a second electrode member,
wherein at least one of the winding core and the battery element supply unit is rotated to twist the first electrode member, the separator ribbon and the second electrode member in order on a circumference of the winding core along a length direction of the winding core.

2. The apparatus for manufacturing a cable-type secondary battery according to claim 1 , further comprising:
a support installed to be rotatable based on an axis coinciding with an axis of the winding core,
wherein a plurality of first electrode bobbins are arranged at regular intervals to surround the winding core and rotatably mounted to the support, respectively.

3. The apparatus for manufacturing a cable-type secondary battery according to claim 2 ,
wherein the separator bobbin and the second electrode bobbin are mounted to a common rotating frame, which is installed to be rotatable based on an axis coinciding with the axis of the winding core, to rotate integrally.

4. The apparatus for manufacturing a cable-type secondary battery according to claim 3 ,
wherein the separator bobbin and the second electrode bobbin are respectively installed to adjust a winding angle with respect to the winding core.

5. The apparatus for manufacturing a cable-type secondary battery according to claim 4 , further comprising:
a first support rod configured to support the separator bobbin and a second support rod configured to support the second electrode bobbin,
wherein the first support rod and the second support rod are respectively installed at the common rotating frame to be pivotal for angle adjustment based on each pivotal portion.

6. The apparatus for manufacturing a cable-type secondary battery according to claim 2 ,
wherein the separator bobbin and the second electrode bobbin are respectively mounted to a first rotating rod and a second rotating rod, which are installed to be rotatable based on an axis coinciding with an axis of the winding core, to rotate independent from each other.

7. The apparatus for manufacturing a cable-type secondary battery according to claim 1 ,
wherein the first electrode member has a structure in which a wire is coated with a negative electrode active material for a secondary battery.

8. The apparatus for manufacturing a cable-type secondary battery according to claim 7 ,
wherein the second electrode member has a strip structure.

9. The apparatus for manufacturing a cable-type secondary battery according to claim 8 ,
wherein a width of the first electrode member and a width of the second electrode member are respectively smaller than a winding circumference, and
wherein a width of the separator ribbon is greater than the winding circumference.

10. The apparatus for manufacturing a cable-type secondary battery according to claim 9 ,
wherein the winding core has a circular section, and
wherein the widths (W) of the first electrode member and the second electrode member respectively satisfy the following equation:
W<D ×π( D :winding inner diameter,π:circular constant).

11. The apparatus for manufacturing a cable-type secondary battery according to claim 9 ,
wherein the winding core has an oval section, and
wherein the widths (W) of the first electrode member and the second electrode member respectively satisfy the following equation:
W<L ( L :winding circumference).

12. The apparatus for manufacturing a cable-type secondary battery according to claim 9 ,
wherein when the separator ribbon is wound to overlap into two layers, the width (W) of the separator ribbon satisfies the following equation:
W> 2 D ×π( D :winding inner diameter,π:circular constant).

13. The apparatus for manufacturing a cable-type secondary battery according to claim 1 ,
wherein the first electrode member has a width of 0.4 to 0.5 mm, the separator ribbon has a width of 7 mm or below, and the second electrode member has a width of 3 mm or below.

14. The apparatus for manufacturing a cable-type secondary battery according to claim 13 ,
wherein the separator ribbon is twisted to overlap 50% or below of the entire width.

15. A method for manufacturing a cable-type secondary battery, comprising:
(a) disposing a first electrode bobbin configured to successively supply a first electrode member, a separator bobbin configured to successively supply a separator ribbon, and a second electrode bobbin configured to successively supply a second electrode member, around a rod-shaped winding core;
(b) rotating the first electrode bobbin based on an axis coinciding with an axis of the winding core to twist the first electrode member of a strip structure at an outside of the winding core;
(c) rotating the separator bobbin based on an axis coinciding with an axis of the winding core to twist the separator ribbon at an outside of the first electrode member; and
(d) rotating the second electrode bobbin based on an axis coinciding with an axis of the winding core to twisting the second electrode member of a strip structure at an outside of the separator ribbon,
wherein a width of the first electrode member and a width of the second electrode member are respectively smaller than a winding circumference, and a width of the separator ribbon is greater than the winding circumference.

16. The method for manufacturing a cable-type secondary battery according to claim 15 ,
wherein in the step (a), the winding core having a circular section is disposed, and
wherein the widths (W) of the first electrode member and the second electrode member respectively satisfy the following equation:
W<D ×π( D :winding inner diameter,π:circular constant).

17. The method for manufacturing a cable-type secondary battery according to claim 15 ,
wherein in the step (a), the winding core having an oval section is disposed, and
wherein the widths (W) of the first electrode member and the second electrode member respectively satisfy the following equation:
W<L ( L :winding circumference).

18. The method for manufacturing a cable-type secondary battery according to claim 15 ,
wherein when the separator ribbon is wound to overlap into two layers, the width (W) of the separator ribbon satisfies the following equation:
W> 2 D ×π( D :winding inner diameter,π:circular constant).

19. The method for manufacturing a cable-type secondary battery according to claim 15 ,
wherein the first electrode member has a width of 0.4 to 0.5 mm, the separator ribbon has a width of 7 mm or below, and the second electrode member has a width of 3 mm or below.

20. The method for manufacturing a cable-type secondary battery according to claim 19 ,
wherein in the step (c), the separator ribbon is twisted to overlap 50% or below of the entire width.

Assignees

• Lg Chemical Ltd

Inventors

• Uhm In-Sung
• Kwon Yo-Han
• Kim Je-Young
• Noh Suk-In
• Lee Dong-Chan

Classifications

• H01M10/058 Primary

  Construction or manufacture · CPC title

• H01M4/13

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• B65H55/005

  with two or more filaments wound in parallel on the bobbin · CPC title

• H01M10/0409

  for cells with wound electrodes · CPC title

• B21C47/02

  Winding-up or coiling · CPC title