| 摘要 |
<p>#CMT# #/CMT# The device has a calculation unit to calculate an internal resistance value of a battery at preset sampling intervals at which data pairs formed by current and voltage of the battery are acquired during a starting up period of an engine in response to the starting of a starter. Another calculation unit calculates a voltage difference, in open circuit, which is a difference between pseudo voltages in the circuit before the starting of the starter and after the period. A correction unit corrects the value using the voltage difference, where the corrected value indicates the battery charge state. #CMT# : #/CMT# An independent claim is also included for a method of calculating a quantity indicating a charge state of a battery. #CMT#USE : #/CMT# Used in a power supply system for calculating a quantity indicating an internal charge state of a rechargeable battery e.g. lead storage battery, nickel metal hydride battery and lithium ion battery, that is utilized for supplying a starter starting an engine mounted on a vehicle (claimed). #CMT#ADVANTAGE : #/CMT# The configuration of the device enables to reduce variations of polarized states of the battery in an efficient and simple manner, thus precisely estimating the internal resistance value of the battery, while reducing the cost of the parts of the device, and avoiding excessive increase in operating speed and precision degree of the value. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a block representation of a power supply system including a rechargeable battery`s internal charge state indicating quantity calculating device.`(Drawing includes non-English language text)` VEinf : Vehicle information 12 : Generator 14 : Current sensor 15 : Battery state processing device 16 : Analog to digital converters.</p> |
