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Metal-air battery with an extended service life

  • US 6,773,842 B2
  • Filed: 03/26/2002
  • Issued: 08/10/2004
  • Est. Priority Date: 03/26/2002
  • Status: Expired due to Fees
First Claim
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1. A battery comprising at least a first metal-air cell assembly and a second metal-air cell assembly electronically connected in parallel, whereinsaid first cell assembly comprises a first casing with a first controllable air vent thereon and at least a first metal-air cell inside said first casing, wherein said first controllable air vent is closed during a battery storage period and is opened in response to a first programmed signal in order to allow outside air or oxygen to enter said at least a first metal-air cell through said first air vent to activate operation of said first metal-air cell assembly;

  • said second cell assembly comprises a second casing with a second controllable air vent thereon and at least a second metal-air cell inside said second casing, wherein said second controllable air vent is closed during a battery storage period and is opened in response to a second programmed signal in order to allow outside air or oxygen to enter said at least a second metal-air cell through said second air vent to activate operation of said second metal-air cell assembly; and

    control means for sending programmed signals to open up said at least first and second vents at the same time or at different moments of time in a programmed fashion.

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