Cylindrical battery

• US 10,461,304 B2
• Filed: 11/27/2015
• Issued: 10/29/2019
• Est. Priority Date: 12/16/2014
• Status: Active Grant

• Current Assignee: Panasonic Energy (Shanghai) Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Fukuoka, Takahiro, Yamashita, Shuichi, Yamaguchi, Yuma, Miyata, Kyosuke
• Primary Examiner(s): Douyette, Kenneth J
• Application Number:
  US15/531,648
• Publication Number:
  US 20170346064A1
• Time in Patent Office: 1,432 Days
• CPC Class Codes: H01M 10/0422 Cells or battery with cylindrical casing
• CPC Class Codes: H01M 10/0431 Cells with wound or folded electrodes H01M10/045 takes precedence
• CPC Class Codes: H01M 50/152 for cells having curved cross-section, e.g. round or elliptic H01M50/15, H01M50/153 take precedence
• CPC Class Codes: H01M 50/171 using adhesives or sealing agents
• CPC Class Codes: H01M 50/528 Fixed electrical connections, i.e. not intended for disconnection
• CPC Class Codes: H01M 50/533 characterised by the shape of the leads or tabs
• CPC Class Codes: H01M 50/534 characterised by the material of the leads or tabs
• CPC Class Codes: H01M 50/538 Connection of several leads or tabs of wound or folded electrode stacks
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

A cylindrical battery including an electrode body in which a negative electrode plate and a positive electrode plate to which a plurality of positive electrode leads is connected are wound with a separator interposed therebetween; an upper insulating plate disposed on the electrode body; a positive electrode current collector plate disposed on the upper insulating plate; a sealing body; and an outer can. A first positive electrode lead extends between the upper insulating plate and the current collector plate after passing through a through-hole of the upper insulating plate and is bent onto the current collector plate at an outer circumference portion thereof, and a second positive electrode lead extends along the outside of an outer circumference portion of the upper insulating plate and is bent onto the current collector plate at the outer circumference portion thereof. Those positive electrode leads are all connected to the current collector plate.

Claims

1. A cylindrical battery comprising:

an electrode body in which a negative electrode plate and a positive electrode plate to which a plurality of positive electrode leads is connected are wound with a separator interposed therebetween;

an upper insulating plate disposed on the electrode body;

a sealing body;

a current collector plate disposed between the upper insulating plate and the sealing body; and

an outer can,

wherein the upper insulating plate has at least one through-hole,

the plurality of positive electrode leads includes at least one first positive electrode lead disposed at an inner circumference side of the upper insulating plate and at least one second positive electrode lead disposed at an outer circumference side of the upper insulating plate,

the first positive electrode lead extends between the upper insulating plate and the current collector plate after passing through the through-hole of the upper insulating plate and is bent onto the current collector plate at an outer circumference portion thereof,

the second positive electrode lead extends along the outside of the outer circumference portion of the upper insulating plate and is bent onto the current collector plate at the outer circumference portion thereof,

the first positive electrode lead and the second positive electrode lead are connected to the current collector plate, and

the current collector plate is electrically connected to the sealing body.

2. The cylindrical battery according to claim 1, wherein the outer circumference portion of the upper insulating plate is provided with a notch portion.

3. The cylindrical battery according to claim 1, further comprising an insulating member having a convex portion along at least a part of an edge portion thereof at a lower portion of the current collector plate.

4. The cylindrical battery according to claim 1, wherein the plurality of positive electrode leads is laser-welded onto an upper surface of the current collector plate.

5. The cylindrical battery according to claim 1, wherein the plurality of positive electrode leads is formed from aluminum or an aluminum alloy.

6. The cylindrical battery according to claim 1, wherein the number of the first positive electrode lead and the number of the second positive electrode lead are each one.