Method and apparatus for charging a valve-regulated lead acid battery

  • US 6,211,651 B1
  • Filed: 03/15/2000
  • Issued: 04/03/2001
  • Est. Priority Date: 03/15/1999
  • Status: Expired due to Term
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First Claim
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1. A method for charging a lead acid battery, comprising the steps of:

  • performing primary constant-current charging at a predetermined current value;

    continuing said primary constant-current charging for a predetermined extension time after a battery voltage reaches a predetermined change-over voltage; and

    changing-over the charging to secondary constant-current charging using a smaller current value than that of said primary constant-current charging after said extension time has passed.

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