Patent ID: 7786734
Filing Date: 2010-08-31
Classification: H01M,H02J,Y02E

Abstract:
1. Method for treatment of accumulators having at least one cell in which a varying direct current from a power unit is applied in intermittent current supply periods, which are interrupted by pauses of substantially less current, the direct current being sufficient to generate gas in the accumulator, wherein said treatment constitutes a regeneration process, wherein said current supply periods have a length of between 0.01 and 1.5 seconds, a current level during said current supply periods amounting to between 80 and 1000 A, said pauses have a length of 1-20 seconds, and wherein process data, for at least one cell in the accumulator, is registered during the treatment process, which process data is used in order to control the treatment process, in the following steps: a) measuring available capacity of the accumulator to be treated by means of a capacity test; b) adapting parameters of said treatment in accordance with the result in step a); and c) using a first set of starting parameters if said capacity is above 80%, using a second set of parameters if said capacity is below 60% and using a further criteria to chose between said first and second starting parameters if said capacity is between 60%-80%, wherein what is controlled during the treatment process is a length of said current supply periods and a length of said pauses and wherein the length of said current supply periods is between 0.15 and 0.4 seconds and the length of said pauses is between 1-10 seconds.