Title:
METHOD AND DEVICE FOR MEASURING REMAINING CAPACITY OF BATTERY
Document Type and Number:
Japanese Patent JP3164999
Kind Code:
B2
Abstract:
PURPOSE: To eliminate unnatural indications by camparing a newly indicated value with the previously indicated value at every outputtings, updating the indicated value at every unit rates based on the result and outputting the result to an indication part.
CONSTITUTION: The release voltage detected by a voltage sensor 9 is read by means of a detection value input circuit 12 just after ignition ON, and the preset initial remaining capacity is set in a remaining capacity calculation part 23, then it is indicated by percentage. After a vehicle starts running, a computer 19 samples at 1ms the voltage and discharge, current detected by a sensor 9 and current sensor 7 so as to obtain an approximate line, and the reference discharge current is obtained at percentage as it is set to zero. The data shown by percentage is compared with the previous one, and when it is the same it is indicated as it is, while it is subtracted/added by 1% when it is more than/less than the previous one, then the result is indicated by an indication part 11. Thus, even when the data changes greatly owing to regeneration braking, no sharp change is indicated, giving no unnatural feeling.
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Inventors:
Youichi Arai
Kenichi Shimoyama
Kenichi Shimoyama
Application Number:
JP8249695A
Publication Date:
May 14, 2001
Filing Date:
April 07, 1995
Export Citation:
Assignee:
Yazaki Corporation
International Classes:
G01R31/36; (IPC1-7): G01R31/36
Attorney, Agent or Firm:
Hidekazu Miyoshi (8 outside)