System and method for determining battery state-of-health
First Claim
1. A method for monitoring and displaying to a user of a vehicle or a system on a real time basis the state of health (SOH) of a storage battery on which said vehicle or system relies, said method comprising the steps of:
- measuring battery voltage and current under one of load and no load conditions for the battery;
computing from the data of the measured battery voltage and current the battery internal resistance and polarization resistance;
determining from said measured battery voltage and current and said computed battery internal resistance and polarization resistance a plurality of the factors of battery state of charge, cold cranking hours, the presence of a shorted cell and the presence of a mismatched cell; and
displaying to the user of said battery said plurality of determined factors.
3 Assignments
0 Petitions
Accused Products
Abstract
A system and method for accurate and in real time determination of factors relating to the state of health of a storage battery. The system measures the values of battery temperature, voltage and current flow into and out of the battery. This data is multiplexed into a computer and the battery'"'"'s internal resistance (IR), polarization resistance (PR), state of charge (SOC) and its cold cranking amp (CCA) capability are computed and displayed. The presence of shorted and mismatched cells also can be determined and displayed. The state of health of the battery is related to these displayed measured values and calculated factors which are made known to the user of the battery.
-
Citations
14 Claims
-
1. A method for monitoring and displaying to a user of a vehicle or a system on a real time basis the state of health (SOH) of a storage battery on which said vehicle or system relies, said method comprising the steps of:
-
measuring battery voltage and current under one of load and no load conditions for the battery;
computing from the data of the measured battery voltage and current the battery internal resistance and polarization resistance;
determining from said measured battery voltage and current and said computed battery internal resistance and polarization resistance a plurality of the factors of battery state of charge, cold cranking hours, the presence of a shorted cell and the presence of a mismatched cell; and
displaying to the user of said battery said plurality of determined factors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A system for monitoring and displaying to a user of a vehicle on a real time basis the state of health (SOH) of a storage battery on which said vehicle relies, said system comprising a circuit module mounted to the battery with a connection to at least one of the battery terminals and said circuit module including
means for measuring the battery voltage and current under one of load and no load conditions and for producing voltage and current data values in digital form; -
means for computing from the data values of the measured battery voltage and current the battery internal resistance and polarization resistance and for computing from the battery voltage, current, internal resistance (IR) and polarization resistance at least one of the factors of battery state of charge, cold cranking hours, the presence of a shorted cell and the presence of a mismatched cell; and
a display for displaying each of said computed factors to the user of said battery. - View Dependent Claims (13, 14)
-
Specification