Alkaline rechargeable battery

• US 6,835,501 B2
• Filed: 05/10/2002
• Issued: 12/28/2004
• Est. Priority Date: 05/11/2001
• Status: Expired due to Term

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Taniguchi, Akihiro, Morishita, Nobuyasu, Ueda, Toshifumi
• Primary Examiner(s): Ryan, Patrick
• Assistant Examiner(s): Martin, Angela J.
• Application Number:
  US10/142,157
• Publication Number:
  US 20030003366A1
• Time in Patent Office: 963 Days
• Field of Search: 429/247, 429/206, 429/129, 429/145
• US Class Current: 429/247
• CPC Class Codes: H01M 10/28 Construction or manufacture
• CPC Class Codes: H01M 10/345 Gastight metal hydride accumulators
• CPC Class Codes: H01M 2010/4292 Aspects relating to capacity ratio of electrodes/electrolyte or anode/cathode
• CPC Class Codes: H01M 50/417 Polyolefins
• CPC Class Codes: H01M 50/44 Fibrous material
• 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

An alkaline rechargeable battery, having an electrode plate group including positive electrode plates and negative electrode plates stacked alternately with separators interposed therebetween, arranged in such a manner that a volume of the separators before the initial charge and discharge accounts for 30 to 60% of a volume of the electrode plate group.

Claims

1. An alkaline rechargeable battery comprising:

an electrode plate group formed by superimposing a positive electrode plate and a negative electrode plate with a separator interposed there between, the positive electrode plate comprising a positive electrode material mainly including nickel hydroxide; and

a battery case that accommodates the electrode plate group,

wherein a volume of the separators before initial charge and discharge accounts for 30 to 60% of a volume of the electrode plate group.

2. The alkaline rechargeable battery according to claim 1, wherein a proportion of voids of the separators before the initial charge and discharge is 50 to 70%.

3. The alkaline rechargeable battery according to claim 1, wherein a percentage of the volume of the electrode plate group before the initial charge and discharge in a capacity of the battery case is 85 to 95%.

4. The alkaline rechargeable battery according to claim 1, wherein the thickness of the separator is less than 0.5 mm.