Exide Technologies Gmbh

Olaf Sielemann

Gerd Hoogestraat

Harald Niepraschk

Rainer Bussar

Wolfgang Rudolf Fischer

Thomas Hopper

Nicolas Henri Bernard Redon

Sebastian Zeh

Satoru Yaegashi

Determining a state of charge (SOC) of a rechargeable battery includes using a first process to determine a first value for the SOC of the battery and using a second process to determine a second value for the SOC of the battery and deriving the SOC as a weighted average of the first value for the SOC and the second value for the SOC. During a charging cycle of the battery an input charge of the battery is determined from an input current flowing into the battery and a charging time. During a discharging cycle an output charge of the battery is determined from an output current flowing out of the battery, a discharging time and an actual capacity of the battery is the sum of the input charge over charging cycles minus the sum of the output charge over discharging cycles.

Method for determining a state of charge and remaining operation life of a battery

Disclosed herein is a composition for use in a negative active material in a valve regulated lead-acid battery, including a carbon material having a BET surface area from 150 m/g to 2000 m/g and having a D-value greater than 5 &#x3bc;m with the amount of carbon material ranging from 0.1 wt % to 1.5 wt % based on the total weight of the composition. Also disclosed herein is a valve regulated lead-acid battery, including a positive plate, a negative plate, a separator, and an electrolyte disposed in a container with a valve, the negative plate including a substrate of lead or a lead alloy and a negative active material of a composition including a carbon material having a BET surface area from 150 m/g to 2000 m/g and having a D-value greater than 5 &#x3bc;m, the amount of carbon material ranging from 0.1 wt % to 1.5 wt % based on the total weight of the composition.

Composition that enhances deep cycle performance of valve-regulated lead-acid batteries filled with gel electrolyte

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Waechtersbach, Germany

Olaf Sielemann