Method for removing lead sulfate film formed in lead-acid battery

• US 20060065548A1
• Filed: 09/17/2003
• Published: 03/30/2006
• Est. Priority Date: 09/24/2002
• Status: Abandoned Application

• Current Assignee: Eruma Co., Ltd.
• Original Assignee: Eruma Co., Ltd.
• Inventors: Okuno, Shigeo
• Application Number:
  US10/528,838
• Publication Number:
  US 20060065548A1
• Time in Patent Office: Days
• US Class Current: 205/646
• CPC Class Codes: H01M 10/4242 Regeneration of electrolyte or reactants
• CPC Class Codes: H02J 7/0069 Charging or discharging for charge maintenance, battery initiation or rejuvenation
• CPC Class Codes: H02J 7/00711 with introduction of pulses during the charging process
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

This invention seeks to provide a novel method for removing membranous lead sulfate deposited on electrodes of a lead-acid battery by dissolving the lead sulfate into fine particles without causing the membranous lead sulfate to fall off or be suspended in the electrolytic solution, thus to recover the performance of the battery in a deteriorated state and prolong the battery life. This invention further seeks to provide a novel method for removing membranous lead sulfate deposit on the electrodes, which can emit little noise to the outside environment. To attain the objects as noted above according to the present invention, there is provided a method for removing membranous lead sulfate deposited on electrodes of the lead-acid battery due to sulfation by using a phenomenon bringing about a conductor skin effect of intensively dissolving the surface layer of the membranous lead sulfate deposited on the electrodes with the pulse current having a short pulse width. The pulse width of the pulse current is preferably 1 μs or less.

Claims

1. A method for removing membranous lead sulfate deposited on electrodes of a lead-acid battery due to sulfation, featured by using a pulse current having a short pulse width to bring about a conductor skin effect for intensively dissolving the surface layer of said membranous lead sulfate deposited on said electrodes of said battery.

2. The method set forth in claim 1, featured by charging said lead-acid battery while or after applying said pulse current to said battery, to resolving the lead sulfate dissolved by applying said pulse current.

3. The method set forth in claim 1, wherein said pulse width of said pulse current is less than 1 μ

s.

4. The method set forth in claim 2, wherein said pulse width of said pulse current is less than 1 μ

s.