Patent Number: 6,166,548

Title: Method of detecting battery capacity in a zinc-air battery

Abstract: A method of detecting battery capacity in a zinc-air battery. The method includes the steps of removing all non-essential loads from the battery for a first period of time, thereafter and for a second period of time, applying a constant load to the battery, periodically sampling the voltage of the battery, and, as a function thereof, determining whether a condition is satisfied during the second period of time, the satisfying of the condition indicating low battery capacity. The method of detecting battery capacity can also determine battery usage on a real-time basis in which an accumulator is loaded with a value representing an expected zinc-air battery capacity, loads on the battery are detected, and the accumulator is decremented based on the detected actual usage. The accumulator reaching a minimum value indicates that the battery capacity is low.

Inventors: Winzer; Jochen (Hamden, CT), Kurple; Bill (Middlebury, CT)

Assignee: Timex Corporation

International Classification: G01R 31/36 (20060101); G01N 027/416 (); G01R 031/36 ()

Expiration Date: 12/26/2017