Renault S.a.s.

Nissan Motor Company Limited

Ampere S.a.s.

Masato Origuchi

Antoine Saint-Marcoux

Bruno Delobel

Flavien Florent Dubief

Michel Mensler

Daniel Boiron

Caroline Marchal

Robert Yu

Ana-Lucia Driemeyer-Franco

Juan-Pablo Soulier

Natalie Rat

Francois Orsini

Benoit Arsac

Mathieu Legrand

Thomas Creach

Aurelie Debart

Anaïs Ricaud

Gwenaëlle Pascaly

Philippe Michel

Franco Ana Lucia Driemeyer

Grégoire Casoetto

François Orsini

Pauline D'HERLINCOURT

A method for detecting a faulty cell in an electric battery pack includes the following steps: measuring the no-load voltage at the terminals of each cell of the battery pack; calculating the deviation between the no-load voltage measured at the terminals of the cell and an average known no-load voltage as a function of the number of days during which the battery pack was not used; calculating the difference between the calculated deviation and a quantity n·σ, n being an integer no lower than 1, and σ being a known standard deviation which is a function of the number of days during which the battery pack was not used; and detecting a faulty cell if the difference is greater than zero.

Method for detecting a faulty cell in an electric battery

A housing for a battery includes an envelope and at least one rupture device provided with a rupture cap. The rupture device is mounted at the location of an opening formed in the envelope. The rupture cap breaks when an excess pressure is exerted on its outer surface situated on the outer side of the housing.

Housing for a battery, and method for introducing an extinguishing fluid into such a housing

A method for managing an electrochemical accumulator or a storage battery includes determining an estimated value of a state of deterioration of the accumulator from the accumulator's history of voltage values, intensity of current flow, and temperature. The estimated value is a barycentric value of the state of deterioration calculated as a barycenter of at least two values. The at least two values include a first value indicative of the state of deterioration of the accumulator calculated by a first method and a second value indicative of the state of deterioration of the accumulator calculated by a second method different from the first method. From an initial commissioning state of the accumulator, barycentric coefficients are varied at least once to calculate the next barycentric value when a previous value of the state of deterioration of the accumulator, calculated according to the first method, has passed a first threshold.

Estimation of the state of deterioration of an electric battery

Disclosed herein is an invention concerning a method for managing charging of a Li-ion battery based on at least one parameter chosen from a group consisting of a state of deterioration of the Li-ion battery and cell unbalance, the method comprising the following steps: a) determining an end-of-charge voltage value of said Li-ion battery, b) generating a control signal controlling the charging of said Li-ion battery, and c) transmitting the control signal to a charger, the control signal being generated in such a way that the Li-ion battery is charged based on the end-of-charge voltage value determined in step a), said end-of-charge voltage value being increased based on the state of deterioration of said Li-ion battery until a limit value is reached, in order to ensure a constant minimal level of required energy in said Li-ion battery is provided at a predetermined reference temperature.

Managing the charging of a battery

A method for charging a battery, including: determining a final state of charge and a final temperature of the battery; and calculating charging power and/or cooling power required to reach the two final values within a minimum amount of time.

Method for charging a battery for supplying power to a drive motor of a motor vehicle

A method for diagnosing operating condition of a device for cutting off and connecting a high-voltage bipolar battery from/to a bipolar onboard power network of a motor vehicle. The device includes a first power relay between a first terminal of the battery and a first terminal of the network, a second power relay between a second terminal of the battery and a second terminal of the network, and a serial arrangement of a third precharge relay and a precharge resistor, connected in parallel to the first power relay. The method: measures two voltages of the cutoff/connection device; compares the measured voltages with predetermined voltage values representing faults of the cutoff/connection device; and diagnoses a fault of a relay used on the result of the comparison.

Method for diagnosing the operation of a device for cutting off and connecting a battery from/to the onboard power network of a motor vehicle

A device for cooling a battery or batteries of a motor vehicle, for example an electric vehicle, includes a temperature regulating unit including an evaporator that is used to cool the passenger compartment of the vehicle and arranged in a housing, the battery or batteries being contained in a case. The housing of the evaporator is connected to a conduit, an outlet of which is oriented towards a heat exchange area on at least one outer surface of the case containing the battery or batteries.

Device for cooling the batteries of an especially electric vehicle and vehicle comprising such a device

An electricity generation module including: a plurality of basic electrochemical cells; plates for supporting the basic cells, the support plates forming spacers for two consecutive basic cells; and a loading mechanism configured to maintain the relative position of the basic cells and the support plates by pressure.

Electricity generation module including a plurality of electrochemical cells and support plates forming spacers for the electrochemical cells

Growing community of inventors

Rambouillet, France

Masato Origuchi