(19)
(11) EP 2 031 671 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
07.07.2010 Bulletin 2010/27

(43) Date of publication:
04.03.2009 Bulletin 2009/10

(21) Application number: 08155717.5

(22) Date of filing: 06.05.2008
(51) International Patent Classification (IPC): 
H01M 2/04(2006.01)
H01M 2/12(2006.01)
 H01M 2/08(2006.01)
H01M 6/08(2006.01)
(84) Designated Contracting States:
BE DE FR GB IT

(30) Priority: 23.08.2007 JP 2007217176
04.12.2007 JP 2007313519

(71) Applicant: Panasonic Corporation
Kadoma-shi Osaka 571-8501 (JP)

(72) Inventors:
  • MATSUHISA, Ichiro c/o Matsushita Electric Ind. Co. Ltd.
    Shiromi, Chuo-ku Osaka 540-6207 (JP)
  • WADA, Seiji c/o Matsushita Electric Ind. Co. Ltd.
    Shiromi, Chuo-ku Osaka 540-6207 (JP)
  • SUMIHIRO, Yasushi c/o Matsushita Electric Ind. Co. Ltd.
    Shiromi, Chuo-ku Osaka 540-6207 (JP)
  • SYOJI, Yasuhiko c/o Matsushita Electric Ind. Co. Ltd.
    Shiromi, Chuo-ku Osaka 540-6207 (JP)

(74) Representative: TBK-Patent 
Bavariaring 4-6
80336 München
80336 München (DE)

   


(54) Alkaline dry battery


(57) A leak-proof alkaline dry battery including a battery case and a seal unit for closing the opening of the battery case. The seal unit includes: a negative electrode terminal plate; a negative electrode current collector nail electrically connected to the terminal plate; and a resin seal member. The resin seal member includes: a central cylindrical part having an opening through which the body of the negative electrode current collector nail is inserted; an outer peripheral cylindrical part interposed between a peripheral edge of the negative electrode terminal plate and an open edge of the battery case; a connecting part interconnecting the central and outer peripheral cylindrical parts; and a thinned section formed in the connecting part. The body of the negative electrode current collector nail is fitted to the opening of the central cylindrical part in a particular fit relation to prevent leakage for a long time.