Commissariat a L'energie Atomique

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Marion Perrin

Arnaud DeLaille

Laurent Grenouillet

François Marion

Jonathan Garcia

Nicolas Olivier

The method for determining the end-of-discharge voltage threshold of a rechargeable battery includes discharging the battery up to a predefined end-of-discharge voltage threshold, at least partially charging the battery, determining, while at least partially charging the battery, an electrical parameter representative of a coup de fouet effect, which coup de fouet effect appears during the partial charging, comparing said electrical parameter with a predetermined characteristic and updating the end-of-discharge voltage threshold to be used for subsequent discharging according to the result of said comparison.

Method for determining the end-of-discharge threshold of a rechargeable battery

The method for controlling the end of discharge of a rechargeable battery according to the invention comprises determining the transition frequency of the battery and determining an end-of-discharge criterion of the battery according to said transition frequency. Said end-of-discharge criterion is representative for example of a predetermined maximum value of the slope of the transition frequency. The transition frequency can be determined periodically during use of the battery, discharging being interrupted by regulating means according to said transition frequency.

Method for controlling the end of the discharge of a rechargeable battery

The batteries of at least one battery subset are partially and preferably simultaneously charged; during this partial charging, electrical parameters representative of a coup de fouet effect on charging are measured to enable the extent of discharge of each of the batteries of the subset to be analyzed; the batteries are then charged sequentially with an order of priority that depends on the extent of discharge of the different batteries; priority is preferably given to charging the most extensively discharged batteries.

Method for managing a bank of rechargeable batteries using the coup de fouet effect on charging

The invention relates to a method for manufacturing chips composed of at least one electrically conductive material. Such a method comprises the following steps:

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Mery, France

Marion Perrin