Battery capacity measuring and remaining capacity calculating system

A remaining capacity calculating system for vehicle batteries, comprising:

• a voltage detecting means for detecting the voltage at the terminals of a battery that is mounted in a vehicle having an electrical rotating machine connected to an engine and that is charged by the electrical rotating machine;
• a current detecting means for detecting a current that flows through the battery;
• an index calculating means for calculating an index of polarization in the battery according to the detected current;
• a control means for controlling the electrical rotating machine so that the index of polarization will remain within a predetermined range which permits limitation of the effect of polarization on the charged state of the battery;
• and
• a calculating means for when the index of polarization remains within the predetermined range, calculating the remaining capacity of the battery according to the detected terminal voltage of the open-circuit voltage of the battery.

An electrical rotating machine control system for vehicles comprising:

• a voltage detecting means for detecting the voltage at the terminals of a battery that is mounted in a vehicle having an electrical rotating machine connected to an engine and that is charged by the electrical rotating machine;
• a current detecting means for detecting a current that flows through the battery;
• an index calculating means for calculating an index of polarization in the battery according to the detected current;
• and
• a control means for controlling the electrical rotating machine so that the index of polarization will remain within a predetermined range which permits limitation of the effect of polarization on the charged state of the battery.

A fully-charged state judging system for vehicle batteries, comprising:

• a voltage detecting means for detecting the voltage at the terminals of a battery that is mounted in a vehicle having an alternator and a regulator for regulating the output voltage of said alternator, and that is charged with the output voltage of said alternator regulated by said regulator;
• a current detecting means for detecting a current that flows through the battery;
• a fully-charged state judging means for, when the detected terminal voltage of the battery and the detected current belong to a predetermined fully-charged state judgment range, judging that the battery is fully charged;
• and an index calculating means for calculating an index of polarization in the battery according to the detected current, wherein said fully-charged state judging means judges whether the battery is fully charged by checking if the index of polarization falls within a predetermined range of index values.

A fully-charged state judging system for vehicle batteries, comprising:

• a voltage detecting means for detecting the voltage at the terminals of the battery that is mounted in a vehicle having an alternator and a regulator for regulating the output voltage of said alternator, and that is charged with the output voltage of said alternator regulated by said regulator;
• a current detecting means for detecting a current that flows through the battery;
• an index calculating means for calculating an index of polarization from the electrolytic solution in the battery according to the detected current;
• and
• a fully-charged state judging means for, when the detected terminal voltage of the battery belongs to a predetermined fully-charged state judgment range and the index of polarization belongs to a predetermined range of index values, judging that the battery is fully charged.