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

Commissariat a L'energie Atomique

Renault S.a.s.

Institut Polytechnique De Grenoble

Université Joseph Fourier - Grenoble

Université Grenoble Alpes

Sylvie Genies

Sébastien Martinet

David Brun-Buisson

Antoine Labrunie

Arnaud DeLaille

Sylvain Leirens

Duy Long Ha

Helene Rouault

Angel Zhivkov Kirchev

Caroline Coutier

Lise Daniel

Sophie Mailley

Mélanie Alias

Nina Kircheva

Marion Chandesris

Estelle Le Baron

Jean-Marie Klein

Côme-Emmanuel Leys

Pierre-Xavier Thivel

Jérémie Salomon

Rémy Christin

David Sicsic

Bramy Pilipili Matadi

Romain Tessard

The invention relates to a method for regenerating the capacity of an electrochemical lithium battery, including the following steps: a) evaluating the quantity of lithium ions; b) when the evaluated lithium ion quantity is less than or equal to a threshold value, applying an electric current between the cathode or the anode and the container such as to cause the delithiation of the casing, the casing is also arranged to house an element providing both electric insulation and ionic conduction between the anode and cathode electrodes of the electrochemical cell and the casing, said casing including at least one lithium ion storage zone.

Method for regenerating the capacity of an electrochemical lithium battery, and associated battery housing and battery

The present invention relates to a flexible structure () comprising a strain gauge () that is elongate along a longitudinal axis Xand intended to measure the deformation of the flexible structure in a direction X parallel to the axis Xthe strain-gauge support () being bonded to the flexible structure only via the lateral ends () thereof. One particularly targeted application is the bonding of strain tool gauges to the packaging of a flexible lithium battery, such as an Li-ion battery.

Flexible structure with strain gauge, application to electrochemical lithium-ion batteries in a flexible packaging

A method recalibrates in situ a comparison electrode integrated into an electrochemical system. The electrochemical system includes a working electrode, a counter electrode, and an electrolyte. The method includes verifying a potential of the comparison electrode relative to the working electrode or to the counter electrode in situ, detecting whether there is a drift in the potential of the comparison electrode relative to a potential plateau for which the comparison electrode was functionalized or designed, and when the drift is detected, recalibrating the comparison electrode in situ.

Method for the in-situ recalibration of a comparison electrode incorporated into an electrochemical system

A device for managing an accumulator, including: a plurality of strain gauges including at least three strain gauges, the strain gauges being arranged to measure stresses along at least three distinct stress axes; a measuring device measuring strains undergone by each gauge along its stress axis; a reversible electrical switch; a calculating device controlling opening and closing of the electrical switch, depending on measurements carried out by the measuring device.

Device for managing an accumulator

Method for monitoring an electrochemical cell or a battery (), in particular method for monitoring the first charging of an electrochemical cell or of a battery () of Li-ion type, comprising a step of acquiring data relating to acoustic emissions produced in the electrochemical cell or in the battery and, by using the data acquired, a step of detecting:

Method for monitoring a Li-ion battery and monitoring device for the implementation thereof

Method for managing the recharging of at least one battery, characterized in that it comprises a transmission of a desired charge level (C) for a battery (i) at a given instant (T) such that the recharging enables the battery (i) to reach a charge level (C(i)) greater than or equal to the desired charge level (C) at the given instant.

Management of the recharging of a set of batteries

The method for charging or discharging a battery comprises measurement of the voltage at the terminals of the battery and comparison of the measured voltage with an end of charging or discharging voltage threshold. The method also comprises measurement of a temperature representative of the temperature of the battery and measurement of the current flowing in the battery to form a pair of measurements. The voltage threshold is then determined according to the pair of measurements. Charging or discharging of the battery is stopped when the voltage threshold is reached.

Method for charging or discharging a battery in order to determine the end of charging or discharging on the basis of measurements of current and temperature

A photovoltaic system including: one photovoltaic panel including a face configured to receive light rays, one battery mechanically connected to the photovoltaic panel by a retaining structure, and one space which is opened onto the environment external to the photovoltaic system forming an air layer separating the battery and the photovoltaic panel and including a thickness at least equal to approximately 1 cm. The ratio between the thickness of the photovoltaic system and a dimension of one side of the face of the photovoltaic panel is less than or equal to approximately &#x2155;.

Photovoltaic system with integrated photovoltaic panel and battery

The diagnostic method applies to a standalone system including a generator, a power regulator and a power storage element. The method includes comparison of the effective charging power or current of the power storage element respectively with a predefined power or current threshold. If the effective charging power or current is lower than said threshold, the power storage element is disconnected. An abnormal behavior is then detected either by comparing the effective charging power with the smaller of the values representative of the theoretical charging power of the power storage element and of the maximum power able to be delivered by the generator and comparing the effective and theoretical charging voltages, or by comparing the effective and theoretical charging currents.

Method of diagnosing defective elements in a standalone system, powered by an intermittent power source

The autonomous system comprises an intermittent power source delivering a direct current. A supercapacitance is connected in parallel with the battery and the power source respectively via a first switch and a second switch. Charging of the battery comprises pulsed current charging managed by a control circuit. During a current pulse, the amplitude of the current and the amplitude of the voltage increase at the terminals of the battery are measured. The dynamic internal resistance of the battery is determined from said amplitudes. A maximum acceptable current threshold is determined according to a maximum voltage threshold, to said dynamic internal resistance and to the no-load voltage at the battery terminals. At the next current pulse, the value of the charging current is limited by controlling the closing time of the second switch.

Method for pulsed charging of a battery in an autonomous system comprising a supercapacitance

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Saint Egreve, France

Sylvie Genies