Battery and method of manufacturing the battery

• US 20050106454A1
• Filed: 02/06/2003
• Published: 05/19/2005
• Est. Priority Date: 02/13/2002
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Kozu, Katsumi, Kaneda, Masaaki, Mizuta, Masahiro, Ishimaru, Takeshi, Toriyama, Koichi, Kataoka, Satoshi, Masumoto, Kenjin
• Granted Patent: US 7,759,001 B2
• Time in Patent Office: Days
• US Class Current: 429/175
• CPC Class Codes: H01M 10/425 Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing printed circuits H05K1/00
• CPC Class Codes: H01M 50/216 adapted for button or coin cells
• 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
• CPC Class Codes: Y10T 29/49108 Electric battery cell making

Abstract

A circuit substrate (3) being electrically connected to a rechargeable battery (2) is arranged upon a sealing plate (23) with a gap therebetween and united with the rechargeable battery (2) by filling resin in the gap. A primary mold (11) formed by the resin is firmly retained by undercut portions formed in engaging protrusions (26). The engaging protrusions (26) may be formed by welding separate engaging members (126, 126a, 126b, 126c, 66, 68).

Claims

1. A battery, comprising a protrusion and/or a recess being formed on a given surface of the battery for retaining molded resin on the battery.

2. The battery according to claim 1, wherein the protrusion and/or recess include an undercut portion that extends outward from the given surface.

3. The battery according to claim 1, wherein the protrusion and/or recess are formed by press-forming on the given surface.

4. The battery according to claim 1, wherein the protrusion and/or recess are provided by welding or bonding a separate member onto the given surface.

5. The battery according to claim 1, wherein the protrusion and/or recess are formed on a sealing plate.

6. A battery, comprising an engaging member being attached on a given surface of the battery by resistance welding for retaining molded resin on the battery.

7. The battery according to claim 6, wherein the engaging member includes an undercut portion that extends outward from the given surface

8. The battery according to claim 6, wherein the engaging member is formed in a cylindrical shape having a face at one end that is bonded to the battery and a flange at the other end.

9. The battery according to claim 6, wherein, when the given surface of the battery is made of aluminum, the engaging member is made of iron that is plated with copper and then tin, or aluminum.

10. The battery according to claim 6, wherein the engaging member is formed in a bottomed tube-like shape whose bottom face is bonded to the battery and whose open end is formed with a flange.

11. The battery according to claim 6, wherein the engaging member is formed with one or a plurality of bosses on a surface thereof that is bonded to the battery.

12. A method for manufacturing a battery, comprising:

using a constituent element formed with a protrusion and/or a recess for retaining filled resin on the battery.

13. A method for manufacturing a battery, comprising:

bonding a separate component on a given surface of a complete battery to form a protrusion and/or a recess for retaining filled resin on the battery.

14. A method for manufacturing a battery, comprising:

setting an engaging member, for retaining resin on the battery, on the battery in a predetermined position so that a bonding face thereof abuts on the battery; and

applying a welding current across welding electrodes that are respectively in pressure contact with the engaging member and a portion that is electrically conductive with the predetermined position so as to weld the engaging member to the predetermined position of the battery.