System and method for determining battery state-of-health

G - Physics – 01 – R

Patent

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Details

G01R 31/36 (2006.01) G01R 31/02 (2006.01)

Patent

CA 2397420

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 (5), voltage (4) and current (3) flow into and out of the battery. This data is multiplexed (20) 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 (6). 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.

La présente invention concerne un système et un procédé de détermination précise en temps réel des facteurs concernant l'état de santé d'une batterie d'accumulateurs. Le système effectue une mesure des valeurs de la température (5), de la tension (4) de la batterie et du courant (3) circulant vers et hors de la batterie. Les données sont multiplexées (20) dans un ordinateur et la résistance interne (IR), la résistance de polarisation (PR), l'état de charge (SOC) et la capacité d'ampérage de démarrage à froid (CCA) de la batterie sont calculés et affichés (6). La présence de cellules court-circuitées et non appariées peut également être détectée et affichée. L'état de santé de la batterie est liée à ces valeurs de mesures affichées et ces facteurs calculés qui sont communiqués à l'utilisateur de la batterie.

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