Centre National De La Recherche Scientifique

California Institute of Technology

Nanyang Technological University

Yazami IP Pte. Ltd.

Université Blaise Pascal

University of California

Institut Polytechnique De Grenoble

Tum Create Limited

Yasmi IP Pte. Ltd.

Cantre National De Le Recherche Scientifique

Rachid Yazami

Brent T Fultz

Yvan Reynier

André Hamwi

Richard Barry Kaner

Qingfang Shi

Channing Ahn

Thannehene Gedara Thusitha Asela Bandara

Kim Seng Tan

Joseph McMenamin

Kenza Maher

Cedric M Weiss

Cher Ming Tan

Pierre Granjon

Julio M D'Arcy

Anne Dailly

Yuxi Wang

Sohaib El Outmani

Andr&eacute; Hamwi

Pascal Hany

Olivier Sename

Olivia Wijaya

Jason A Graetz

Sohaïb El Outmani

A method for detecting internal short circuit within an electrochemical cell, from on-line measuring and processing thermodynamics data and kinetics data on the electrochemical cell. The thermodynamics data comprises open-circuit voltage data, entropy variations and/or enthalpy variations data, and combinations thereof. The kinetics data comprises cell voltage, cell temperature, cell internal resistance and current, and combinations thereof.

Method and system for detecting internal short-circuit (ISC) in batteries and battery cells implementing such ISC detection method

The invention relates to a method and a device for measuring, in real time and in situ, thermodynamic data of a battery (enthalpy and entropy). The object of the invention is to provide a reliable method for measuring, in situ, online and in real time, the variation in entropy (ΔS) of a battery. To this end, the method is characterized in that it consists primarily in: (phase I) producing a prior model of the battery: (a) charging the battery; (b) and/or discharging the battery; (c) measuring actual variables; (d) modeling the electrical behavior of the battery during charging (a) and/or discharging (b) in order to estimate the electrical parameters of the battery; (e) estimating electrical parameters of the battery; (f) modeling the thermal behavior of the battery during charging (a) and/or discharging (b) in order to estimate ΔS in situ, online and in real time; (g) estimating ΔS, by using at least one of the electrical parameters estimated in step (d); (phase II) measuring ΔS of the battery during use in any application and with any state of charge by carrying out step (d) and step (f) of phase I, step (c) and step (g); (phase III) optionally storing the data measured/calculated in phase II and/or in phase I. The invention also relates to a method for determining the state of charge and the state of health of a battery on the basis of these thermodynamic data. Another subject of the invention is a device for implementing this method.

Method and device for measuring, in real time and in situ, thermodynamic data of a battery (enthalpy and entropy)

A method for assessing a state of charge/discharge (SOC/SOD) for a secondary electrochemical cell, the cell having a first operational mode during which the cell is charged from a power supply connected to terminals of the cell, a second operational mode during which the cell is discharged into a load and a rest mode, the method comprising steps of measuring entropy and enthalpy for the electrochemical cell in the course of the first and second operational modes and during rest, and calculating a data representative of the state of charge/discharge (SOC/SOD).

Method and system for assessing a state of charge/discharge (SOC/SOD) for an electrochemical cell

A Non-Linear Voltammetry (NLV)-based method for charging batteries. It also relates to a fast charging system implementing this method. Adaptive charging, Non-Linear Voltage changing, and Relaxation are the key cornerstones of this method. Adaptive charging allows the system to balance the charging based on the user's time requirements, required charge capacity and the SOC and SOH of the battery. Non-linearly changing the voltage coupled with a suitable relaxation pattern allows this method to gain the maximum charge capacity without straining the battery.

Non-linear voltammetry-based method for charging a battery and fast charging system implementing this method

An adaptive charging protocol (ACP) implemented for fast-charging a rechargeable battery having electrode terminals connected to terminals of a power supply provided to apply time-varying voltages to the electrodes, comprising, before starting a charging operation for the battery, the steps of: detecting the existence of historical data on previous charging operations for the battery; in case of detection, processing the historical data to adjust charging parameters in view of optimizing the charging operation; in absence of detection, electrically testing the battery to get data on variations of the state of charge (SOC) for the battery, in view of building a learning model on the SOC variations to be used for optimizing the charging operation.

Adaptive charging protocol for fast charging of batteries and fast charging system implementing this protocol

A method for online assessing a state of health (SOH) of an electrochemical cell, comprises a step for estimating the state of health (SOH) of the electrochemical cell from thermodynamics data related to the cell the thermodynamics data including entropy and enthalpy variations &#x394;S, &#x394;H within the cell. A system for fast-charging a rechargeable battery with terminals connected to internal electrochemical cells, comprises a power supply connected to the rechargeable battery and arranged for applying a time-varying charging voltage to the battery terminals, a charging-control processor for controlling the power supply, and a system for online assessing a state of health (SOH) of the battery, the SOH assessment system comprising means for estimating the state of health (SOH) of the electrochemical cell from thermodynamics data related to the battery.

Method and system for online assessing state of health of a battery

A method for fast-charging an electrochemical cell comprises the steps of: &#x2014;providing the electrochemical cell, the electrochemical cell presenting an initial state of charge (SOC), and&#x2014;providing a time-varying charging voltage to the electrochemical cell, thereby generating a charging current resulting in charging of the electrochemical cell from the initial SOC up to a target value SOCfor the state of charge. The step of providing a time-varying charging voltage involves applying N bundles of current pulses in such a way that: each bundle k (1&#x2264;k&#x2264;N) comprises a variable number Pof ipulses (1&#x2264;i&#x2264;P), each ipulse in a k bundle being defined by a C-rate equal to n&#xb7;C and a duration &#x3c4;. at each pulse i, the state of charge (SOC) is increased by &#x3b4;(%)=n&#xb7;&#x3c4;/M, with M as a predetermined parameter.

Method and system for fast-charging an electrochemical cell and fast-charging controller implemented in this system

Provided are methods, systems and devices for thermodynamically evaluating electrochemical systems and components thereof, including electrochemical cells such as batteries. The present systems and methods are capable of monitoring selected electrochemical cell conditions, such as temperature, open circuit voltage and/or composition, and carrying out measurements of a number of cell parameters, including open circuit voltage, time and temperature, with accuracies large enough to allow for precise determination of thermodynamic state functions and materials properties relating to the composition, phase, states of charge, health and safety and electrochemical properties of electrodes and electrolytes in an electrochemical cell. Thermodynamic measurement systems of the present invention are highly versatile and provide information for predicting a wide range of performance attributes for virtually any electrochemical system having an electrode pair.

Accurate assessment of the state of charge of electrochemical cells

The invention relates to a metal battery, and in particular, to a metal battery including a liquid anode and a liquid cathode. The metal batteries can operate at ambient temperature and can be prepared fully uncharged for safe transport and storage.

Metal battery having liquid anode and liquid cathode

The invention relates to an electrolyte for a metal air battery, and in particular, to an ionic liquid electrolyte for a metal air battery. The ionic liquid electrolyte includes an additive to improve oxygen solubility thereof. The invention also define a method of impregnating a fluorinated carbon compound into an electrode comprising depositing onto the electrode a dispersion comprising the fluorinated carbon compound dissolved in an organic solvent and placing the electrode in an inert environment.

Ionic liquid electrolyte and fluorinated carbon electrode

A method for testing a battery may be provided. The method may include: bringing the battery to a pre-determined voltage; determining a parameter of the battery, the parameter of the battery including at least one of an entropy of the battery at the pre-determined voltage or an enthalpy of the battery at the pre-determined voltage; and determining an ageing history of the battery based on the determined parameter.

Methods for testing a battery and devices configured to test a battery

The invention relates to an electrolyte membrane for a liquid anode cell battery. In particular, the electrolyte membrane is coated with a coating protective against decomposition of the electrolyte membrane in contact with a liquid anode.

Electrolyte membrane for liquid anode cell battery

Imbedded chip for battery applications

In various embodiments, a device for testing a battery may be provided. The device for testing a battery may include: a determination circuit configured to determine at least one of a differential enthalpy of the battery and a differential entropy of the battery; and an evaluation circuit configured to evaluate a health state of the battery based on the determined at least one of the differential enthalpy and the differential entropy.

Devices for testing a battery and methods for testing a battery

Ion storage electrodes formed by coating an underlying substrate with a nanofibrillar film of structured conjugate polymer nanofibers and methods of forming such electrodes are described herein. The electrical properties of the electrodes may be customized by modifying the structure of the polymer nanofibers, the thickness of the nanofiber film, and the pore size of the nanofiber films.

Growing community of inventors

Singapore, Singapore

Rachid Yazami