Title:
METHOD AND DEVICE FOR MEASURING STATE OF DISCHARGE OF BATTERY
Document Type and Number:
Japanese Patent JPS59178376
Kind Code:
A
Abstract:
The charging state (D) of a battery is defined as the ratio between the capacity supplied by the battery and its nominal capacity, expressed in ampere-hours. The process for measuring the charging state involves determining the slope of the curve giving the variation in the battery voltage (E) with time (t) at a conveniently chosen observation time (t3), while the battery is being discharged by a measured constant current (i). The slope is taken to be a quantity representative of the charging state of the battery. The process can be used with advantage for the rapid, accurate and non-destructive testing of batteries intended for use in portable appliances, e.g. electronic watches, in order to check the state of the battery before it is introduced into the appliance.
Inventors:
JIYANNPOORU RANDEIN
FUREDEI CHIYUURIHI
ROORANDO JIYANMONO
FUREDEI CHIYUURIHI
ROORANDO JIYANMONO
Application Number:
JP4943384A
Publication Date:
October 09, 1984
Filing Date:
March 16, 1984
Export Citation:
Assignee:
ASULAB SA
International Classes:
G01R31/36; H01M10/44; (IPC1-7): G01R31/36
Attorney, Agent or Firm:
Toshio Yano