Shutdown system for metal-air batteries and methods of use thereof

• US 9,627,726 B2
• Filed: 03/14/2013
• Issued: 04/18/2017
• Est. Priority Date: 04/04/2012
• Status: Active Grant

• Current Assignee: Phinergy Ltd.
• Original Assignee: Phinergy Ltd.
• Inventors: Tzidon, Dekel, Yakupov, Ilya
• Primary Examiner(s): Cantelmo, Gregg
• Application Number:
  US14/390,577
• Publication Number:
  US 20150171494A1
• Time in Patent Office: 1,496 Days
• CPC Class Codes: H01M 12/06 with one metallic and one gaseous electrode
• CPC Class Codes: H01M 12/065 with plate-like electrodes or stacks of plate-like electrodes
• CPC Class Codes: H01M 12/085 Zinc-halogen cells or batteries
• CPC Class Codes: H01M 2004/021 Physical characteristics, e.g. porosity, surface area
• CPC Class Codes: H01M 6/5072 Preserving or storing cells

Abstract

This invention provides a shutdown system and methods for battery shutdown followed by a standby mode using a washing solution controlled by pH such that the electrode remains stable.

Claims

1. A method for a metal-air battery shutdown followed by a standby mode, said method comprises:

transferring an electrolyte solution of a battery to an electrolyte tank;

circulating a washing solution comprising an acidic agent through said battery; and

transferring said washing solution to a washing solution reservoir when said washing solution reaches a predetermined pH value;

thereby the battery is shutdown and is in a standby mode.

2. The method of claim 1, wherein during said circulation, the pH of said washing solution is monitored by pH monitoring element and wherein if the pH value of said washing solution is higher than a predetermined value, an acidic agent is added to said washing solution.

3. The method of claim 1, wherein said predetermined pH value ranges between 4-9.

4. The method of claim 2, wherein said pH monitoring element is a pH meter, a voltage meter or combination thereof.

5. The method of claim 1, wherein said circulating of said washing solution is performed between the battery and between a washing solution reservoir that is connected to said battery.