Charging method for batteries

• US 5,148,096 A
• Filed: 06/06/1991
• Issued: 09/15/1992
• Est. Priority Date: 06/07/1990
• Status: Expired due to Fees

• Current Assignee: Dornier GmbH (Government of France)
• Original Assignee: Dornier GmbH (Government of France)
• Inventors: Denzinger, Wolfgang
• Primary Examiner(s): Stephan, Steven L.
• Assistant Examiner(s): To, E. H.
• Application Number:
  US07/710,050
• Time in Patent Office: 467 Days
• Field of Search: 320/9, 320/30, 320/31, 320/32
• US Class Current: 320/160
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H02J 7/00714 in response to battery charging or discharging current
• CPC Class Codes: H02J 7/007182 in response to battery voltage
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A charging method for accumulators in two phases, the first phase being a constant current charging up to a given value of the battery voltage and, in the second phase, the battery voltage being limited as a function of the charging current.

Claims

1. A charging method for batteries comprising:

a first phase being a constant current charging up to a given value of a battery voltage U; and

a second phase in which the battery voltage U is limited as a function of a charging current i_L, the following relationship existing between the battery voltage U and the charging current i_L ;

space="preserve" listing-type="equation">U=U.sub.o +Δ

U

wherein

U_o =current-independent part of the battery voltage U,

Δ

U=current-dependent part of the battery voltage U

space="preserve" listing-type="equation">Δ

U=f·

i.sub.L ·

R.sub.i

with

f=factor smaller than 1

i_L =charging current

R_i =internal resistance of the battery.

2. The method of claim 1, wherein f is between 0.5 and 1.

3. The method of claim 2, wherein f is 0.8.