EP4552175A1 - Procédé de caractérisation de l'état de santé d'une batterie au lithium avec un électrolyte à l'état solide ou gélifié et dispositifs associés - Google Patents
Procédé de caractérisation de l'état de santé d'une batterie au lithium avec un électrolyte à l'état solide ou gélifié et dispositifs associésInfo
- Publication number
- EP4552175A1 EP4552175A1 EP23735346.1A EP23735346A EP4552175A1 EP 4552175 A1 EP4552175 A1 EP 4552175A1 EP 23735346 A EP23735346 A EP 23735346A EP 4552175 A1 EP4552175 A1 EP 4552175A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- battery
- electrochemical element
- state
- data
- health
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N24/00—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
- G01N24/10—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using electron paramagnetic resonance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/60—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using electron paramagnetic resonance
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
Definitions
- the present invention relates to a method for characterizing the state of health of at least one electrochemical element of a battery, the battery being a lithium battery with an electrolyte in the solid or gelled state.
- the present invention also relates to associated devices, namely a calculator and a characterization device.
- a battery typically comprises one or more current accumulators also called electrochemical generators, cells or elements.
- An accumulator is an electricity generating device in which chemical energy is converted into electrical energy. The chemical energy comes from electrochemically active compounds deposited on at least one face of electrodes arranged in the accumulator. Electrical energy is produced by electrochemical reactions during battery discharge.
- the electrodes, arranged in a container, are electrically connected to current output terminals which ensure electrical continuity between the electrodes and an electrical consumer with which the accumulator is associated.
- a battery can be divided into modules, each module being composed of one or more accumulators connected together in series and/or in parallel.
- a battery can for example comprise one or more parallel branches of accumulators connected in series and/or one or more parallel branches of modules connected in series.
- a charging circuit is generally provided to which the battery can be connected to recharge the accumulators.
- an electronic management system comprising measurement sensors and an electronic control circuit, more or less advanced depending on the applications, can be associated with the battery.
- Such a system makes it possible in particular to organize and control the charging and discharging of the battery, to balance the charging and discharging of the different accumulators of the battery in relation to each other.
- rechargeable lithium-ion accumulators offer excellent energy and volume densities but present a risk of flammability due to the use of liquid electrolytes.
- the SOH state of health makes it possible to estimate the aging of the battery between a new state and an end-of-life state, or more generally, between an initial state and a final state.
- a technique for determining the state of health SOH is a technique in which the values of temperature, voltage, and possibly current of the battery are monitored to determine a value of the state of health SOH from aging laws .
- aging laws are obtained from tests carried out in the laboratory. The application of the aging laws to the monitored values thus gives an estimate of the aging of the battery.
- Another technique for determining the SOH state of health is a technique in which the ratio of the battery resistance at a given time is calculated by measuring the voltage and current to the resistance of the battery when new. or initial under the same measurement conditions (in particular under the same temperature conditions). In fact, the resistance increases as the battery ages, reflecting a loss of power. In such a case, the expression state of health SOH linked to battery resistance is often used or its abbreviation SOHR which refers to the corresponding English name “State of Health related to battery Resistance”.
- Another technique for determining capacity aging is to observe the shape of the deformation of the element over a partial cycle.
- the description describes a method for characterizing the state of health of at least one electrochemical element of a battery, the battery being a battery with a paramagnetic element with an electrolyte in the solid or gelled state, the process comprising a step of:
- the data comprising a spectrum obtained by implementing an electronic paramagnetic resonance technique or an image obtained by implementing an electronic paramagnetic resonance technique
- the abnormal structure is an aggregate or a dendrite.
- the process is implemented during the operation of the at least one electrochemical element.
- the specific data comprises at least one spectrum
- the analysis step comprising the recognition of a specific line shape in said at least one spectrum
- the acquired data comprises at least one image
- the analysis step comprising the search for specific patterns in the at least one image.
- the method further comprises a step of calculating a parameter of the state of health of the at least one electrochemical element depending on the presence or absence of an abnormal structure.
- the method further comprises a step of determining at least one property of each abnormal structure.
- each abnormal structure is the location of the abnormal structure.
- the parameter of the state of health of the at least one electrochemical element calculated during the calculation step is also a function of each property determined for each abnormal structure.
- the method further comprises a step of measuring the temporal evolution of at least one physical quantity of the at least one electrochemical element, the acquired data also comprising the temporal evolution measured in the measurement step.
- the description also relates to a calculator adapted to characterize the state of health of at least one electrochemical element of a battery, the battery being a battery with a paramagnetic element with an electrolyte in the solid or gelled state, the calculator being suitable for:
- the description also relates to a device for characterizing the state of health of at least one electrochemical element of a battery, the battery being a single-cell battery. paramagnetic with an electrolyte in the solid or gelled state, the characterization device comprising:
- an imager capable of acquiring data relating to the at least one electrochemical element by an electronic paramagnetic resonance technique, the data comprising a spectrum obtained by implementing an electronic paramagnetic resonance technique or an image obtained by work of an electronic paramagnetic resonance technique, and
- a calculator capable of analyzing the data acquired by the imager to detect the presence or absence of an abnormal structure of the paramagnetic element in the at least one electrochemical element.
- Figure 1 is a representation of a flowchart of an example of implementation of an example of a process for characterizing an electrochemical element
- Figure 2 is a schematic representation of an example of a battery comprising an electrochemical element on which the characterization method of Figure 1 can be implemented and of an example of characterization device used in the implementation implementation of the characterization process of Figure 1,
- Figure 3 is a schematic representation of part of the characterization device of Figure 2
- Figure 4 is a representation of a flowchart of an example of implementation of another example of a method for characterizing an electrochemical element
- Figure 5 is a representation of a flowchart of an example of implementation of yet another example of a method for characterizing an electrochemical element.
- Figure 1 illustrates a flowchart of an example of implementation of a characterization process.
- the characterization process is a process for characterizing the state of health of an electrochemical element of a battery 20.
- a battery 20 interacting with a characterization device 22 capable of implementing the characterization process are represented on the figure 1.
- a battery is generally an arrangement of a plurality of electrochemical elements but for the sake of simplification of the subject, a case with a single electrochemical element is described in what follows, knowing that the transposition to d other arrangements are immediate.
- the battery 20 comprises an electrochemical element 24 and a management system 26 of the electrochemical element 24.
- an electrochemical element 24 is an electricity production device in which chemical energy is converted into electrical energy.
- the electrochemical element 24 therefore delivers a current and a voltage between two terminals.
- battery 20 is a lithium battery with a solid state electrolyte.
- the electrochemical element 24 comprises a positive electrode, a negative electrode and an electrolyte.
- the positive electrode also called cathode designates the electrode where the electrons enter, and where the cations (Li + ) arrive in discharge.
- the positive electrode can be of any known type.
- the positive electrode typically consists of a conductive support used as a current collector on which the cathodic active material and a carbon electronic material are deposited.
- a binder can also be incorporated into the mixture.
- the cathode active material is not particularly limited. It can be chosen from the following groups or their mixtures:
- M' and M are different from each other and are selected from the group consisting of B, Mg, Al, Si, Ca, Ti, V, Cr, Fe , Co, Ni, Cu, Zn, Y, Zr, Nb and Mo, with 0.8 ⁇ x ⁇ 1.2;0 ⁇ y ⁇ 0.6;0.0 ⁇ z ⁇ 0.2;
- the current collector is, for example, a two-dimensional conductive support such as a solid or perforated strip, based on carbon or metal, for example nickel, steel, stainless steel or aluminum, preferably aluminum.
- the current collector can be coated on one or both sides with a layer of carbon.
- current collector an element such as pad, plate, sheet or other, made of conductive material, connected to the positive or negative electrode, and ensuring the conduction of the flow of electrons between the electrode and the terminals of the battery.
- the carbon electronic material or conductive material is generally chosen from graphite, carbon black, acetylene black, soot, graphene, carbon nanotubes or a mixture thereof.
- the carbon electronic material is distributed throughout the active material particles and the current collector.
- the negative electrode also called anode designates the electrode from which the electrons leave, and from which the cations (Li + ) are released in discharge.
- the negative electrode typically consists of a conductive support used as a current collector on which the anodic active material and a carbon electronic material are deposited.
- a binder can also be incorporated into the mixture.
- a negative electrode is also present (generally initially limited to the current collector only).
- the anodic active material is not particularly limited. It can be chosen from the following groups and their mixtures:
- TNO titanium and niobium oxide TNO having the formula LixTia-yMyNbb-zM zO((x+4a+5b)/2)-c-dXc where:
- M and M'each represent at least one element chosen from the group consisting of Li, Na, K, Mg, Ca, B, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Al , Y, Zr, Nb, Mo, Ru, Ag, Sn, Sb, Ta, W, Bi, La, Pr, Eu, Nd and Sm;
- X represents at least one element chosen from the group consisting of S, F, Cl and Br.
- the index d represents an oxygen deficiency.
- the d index can be less than or equal to 0.5.
- Said at least one titanium and niobium oxide can be chosen from TiNb2O?, Ti2Nb2O?, Ti2Nb2O9 and Ti2Nb O29.
- lithiated titanium oxide is chosen from the following oxides: i) Lix-aMaTiy. b M O4-c-dXc in which:
- M represents at least one element chosen from the group consisting of Na, K, Mg, Ca, B, Mn, Fe, Co, Cr, Ni, Al, Cu, Ag, Pr, Y and La;
- M' represents at least one element chosen from the group consisting of B, Mo, Mn, Ce, Sn, Zr, Si, W, V, Ta, Sb, Nb, Ru, Ag, Fe, Co, Ni, Zn, Al, Cr, La, Pr, Bi, Sc, Eu, Sm, Gd, Ti, Ce, Y and Eu;
- X represents at least one element chosen from the group consisting of S, F, Cl and Br;
- the index d represents an oxygen deficiency.
- the index d can be less than or equal to 0.5. ii) H x TiyO4 in which 0 ⁇ x ⁇ 1;0 ⁇ y ⁇ 2, and iii) a mixture of compounds i) to ii).
- Examples of lithiated titanium oxides belonging to group i) are spinel Li 4 Ti 5 0i2, Li 2 TiOs, ramsdellite Li 2 Ti 3 O7, LiTi 2 C>4, Li x Ti 2 C>4, with 0 ⁇ x ⁇ 2 and Li 2 Na2Ti 6 0i4.
- a preferred LTO compound has the formula Li ⁇ aMaTis tMbC for example Li 4 Ti 5 0i 2 which is also written Li4/3Ti 5 /3C>4.
- the binder possibly present at the positive electrode and the negative electrode has the function of reinforcing the cohesion between the particles of active materials as well as improving the adhesion of the mixture according to the invention to the current collector.
- the binder can contain one or more of the following: polyvinylidene fluoride (PVDF) and its copolymers, polytetrafluoroethylene (PTFE) and its copolymers, polyacrylonitrile (PAN), poly(methyl)- or (butyl)methacrylate, polyvinyl chloride (PVC), poly (vinyl formai), polyester, block polyetheramides, acrylic acid polymers, methacrylic acid, acrylamide, itaconic acid, sulfonic acid, elastomer and cellulose compounds.
- PVDF polyvinylidene fluoride
- PTFE polytetrafluoroethylene
- PAN polyacrylonitrile
- PVC poly(methyl)- or (butyl)methacrylate
- PVC polyvin
- the elastomer(s) which can be used as a binder may be chosen from styrene-butadiene (SBR), butadiene-acrylonitrile (NBR), hydrogenated butadiene-acrylonitrile (HNBR), and a mixture of several of these.
- SBR styrene-butadiene
- NBR butadiene-acrylonitrile
- HNBR hydrogenated butadiene-acrylonitrile
- the electrolyte here is a solid electrolyte.
- the electrolyte is in particular chosen from sulfur electrolytes, oxide type electrolytes, polymer electrolytes, polymer/ceramic hybrid electrolytes and any of their mixtures.
- the solid electrolyte is chosen from sulfur electrolytes and polymers.
- the solid electrolyte is chosen from sulfur electrolytes, that is to say comprising sulfur, more preferably from sulfur electrolytes, alone or in mixture with other constituents, such as polymers or gels.
- sulfur electrolytes that is to say comprising sulfur
- other constituents such as polymers or gels.
- the sulphides forming the electrolytic layer differ from the sulphide compounds forming the coating layer in that they have an ionic conductivity greater than 10 -2 S.nr 1 and an electronic conductivity of between 10 -8 and 10 -10 S.nr 1 .
- the electrolytic materials may also include oxysulfides, oxides (garnet, phosphate, anti-perovskite, etc.), hydrides, polymers, gels or ionic liquids that conduct lithium ions.
- battery 20 is a lithium battery with a gel electrolyte.
- gelled is meant an electrolyte having a viscosity less than or equal to 100 mPa.s at 25°C.
- electrochemical element 24 forming part of an all-solid lithium battery (with an electrolyte in the solid state) or hybrid ( with a gel electrolyte).
- the management system 26 is a system capable of managing the electrochemical element 24.
- the management system 26 generally comprises a set of sensors (for example, voltage, current or temperature) and a calculator. These elements are not shown in Figure 2 for reasons of clarity.
- the characterization device 22 comprises an imager 28 and a calculator 30.
- the imager 28 is capable of acquiring data relating to the electrochemical element 24 by an electronic paramagnetic resonance technique.
- these data are a spectrum obtained by using an electronic paramagnetic resonance technique or an image obtained by using an electronic paramagnetic resonance technique.
- image includes both spatial images and spatial representations of a physical quantity.
- the image can be considered as a representation of the spatial variation of the spectrum of the electrochemical element 24, for example the variation along the central axis of the electrochemical element 24.
- the imager 28 comprises a cavity 32, a magnetic field generator 34, an excitation unit 36, a detector 38, a waveguide 40 and an adapter 42.
- the cavity 32 is intended to receive the battery 20 comprising the electrochemical element 24 to be studied.
- cavity 32 has the shape of a rectangular parallelepiped.
- the magnetic field generator 34 is capable of applying a static magnetic field in the cavity 32.
- the magnetic field generator 34 is, for example, a set of coils supplied with current, the control of the current making it possible to control the amplitude of the field static in cavity 32.
- the excitation unit 36 is capable of operating at a frequency between 1 GHz and 2 GHz, preferably at 1 GHz.
- the detector 38 is capable of detecting the absorption by lithium of the electrochemical element 24 of the microwave excitation emitted by the excitation unit 36.
- the detector 38 is in reality capable of detecting the absorption of any paramagnetic species, so that the detector 38 is capable of following the evolution of all these species.
- the waveguide 40 allows the propagation of microwaves between the adapter 42 on the one hand and the excitation unit 34 and the detector 36 on the other hand.
- the adapter 42 has an opening in communication with the cavity 32 and makes it possible to ensure the propagation of microwaves between the waveguide 40 and the cavity 32.
- the calculator 30 is capable of carrying out post-processing on the data acquired by the imager 28 to obtain information concerning the state of health of the electrochemical element 24.
- the interaction between the calculator 30 and a computer program product 50 allows the implementation of steps of the characterization process, certain steps of which are implemented by computer.
- the calculator 30 here is a desktop computer.
- the calculator 30 is a rack-mounted computer, laptop, tablet, personal digital assistant (PDA), or smartphone.
- PDA personal digital assistant
- the computer is adapted to operate in real time and/or is in an on-board system, in particular in a vehicle such as an airplane or a car.
- the calculator 30 comprises a calculation unit 52, a user interface 54 and a communication device 56.
- the calculation unit 52 is an electronic circuit designed to manipulate and/or transform data represented by electronic or physical quantities in registers of the calculator 30 and/or memories into other similar data corresponding to physical data in the register memories or other types of display devices, transmission devices or storage devices.
- the computing unit 52 includes a single-core or multi-core processor (such as a central processing unit (CPU), a graphics processing unit (GPU), a microcontroller, and a digital signal processor ( DSP)), a programmable logic circuit (such as an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), a programmable logic device (PLD), and programmable logic arrays (PLA)), a state machine, a logic gate and discrete hardware components.
- a single-core or multi-core processor such as a central processing unit (CPU), a graphics processing unit (GPU), a microcontroller, and a digital signal processor ( DSP)
- a programmable logic circuit such as an application-specific integrated circuit (ASIC),
- the calculation unit 52 comprises a data processing unit 58 adapted to process data, in particular by carrying out calculations, memories 60 adapted to store data and a reader 62 adapted to read a computer-readable medium.
- the user interface 54 includes an input device 64 and an output device 66.
- the input device 64 is a device allowing the user to enter information or commands on the computer 30.
- the input device 64 is a keyboard.
- the input device 64 is a pointing device (such as a mouse, touchpad, and graphics tablet), a voice recognition device, an eye tracker, or a haptic (motion analysis) device.
- the output device 66 is a graphical user interface, i.e. a display unit designed to provide information to the user of the calculator 30.
- the output device 66 is a display screen allowing a visual presentation of the output.
- the output device 66 is a printer, an augmented and/or virtual display unit, a speaker or other sound generating device for presenting the output in sound form, a unit producing vibrations and/or odors or a unit adapted to produce an electrical signal.
- the input device 64 and the output device 66 are the same component forming human-machine interfaces, such as an interactive screen.
- the communication device 56 allows unidirectional or bidirectional communication between the components of the computer 30.
- the communication device 56 is a bus communication system or an input/output interface.
- the presence of the communication device 56 allows that, in certain embodiments, the components of the computer 30 are distant from each other.
- the computer program product 50 includes a computer readable medium 68.
- the computer-readable medium 68 is a tangible device readable by the reader 62 of the computing unit 52.
- computer-readable media 68 is not a transient signal per se, such as radio waves or other freely propagating electromagnetic waves, such as light pulses or electronic signals.
- Such a computer-readable storage medium 68 is, for example, an electronic storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device or any combination of these.
- a computer program is stored on the computer readable storage medium 68.
- the computer program includes one or more stored program instruction sequences.
- Such program instructions when executed by the data processing unit 52, result in the execution of steps of the method.
- Program instructions are written in any combination of one or more languages, for example an object-oriented programming language (FORTRAN, C++, JAVA, HTML), a procedural programming language (C language for example).
- program instructions are downloaded from an external source over a network, as is particularly the case for applications.
- the computer program product comprises a computer-readable data carrier on which the program instructions are stored or a data carrier signal on which the program instructions are encoded.
- the computer program product 50 includes instructions that can be loaded into the data processing unit 52 and adapted to cause execution of the method when executed by the data processing unit 52 Depending on the embodiments, the execution is entirely or partially carried out either on the computer 30, that is to say a single computer, or in a system distributed between several computers (in particular via the use of computer technology). in cloud).
- the characterization process comprises an acquisition step E10, an analysis step E12 and a calculation step E16.
- the imager 28 acquires data relating to the electrochemical element by implementing an electronic paramagnetic resonance technique.
- the data comprises a spectrum or an image.
- Electron paramagnetic resonance is often referred to as EPR.
- the data acquired by the imager 28 are called RPE data in the remainder of the description.
- the EPR technique is a local characterization technique allowing, in a material, to obtain information concerning the nature of the species comprising unpaired or single electrons, as well as information on their concentrations, their reactivity, their environment, their dynamics and magnetic interactions between these species and with other magnetic species.
- a photon of energy hv can be absorbed (or emitted) if the energy separation between the 2 levels concerned, that is to say g *
- the acquisition step E10 includes the application of a static magnetic field by the magnetic field generator 34.
- the excitation unit 36 applies microwave excitation in the cavity 32.
- Cavity 32 then becomes resonant when cavity 32 absorbs most of the microwave energy emitted by excitation unit 36.
- the detector 38 then detects the absorption by the electrochemical element 24 of the microwave excitation.
- the detector 38 is capable of detecting in a field of vision, for example of the order of 2 cm by 7 mm.
- the computer 30 analyzes the RPE data acquired to detect the presence or absence of an abnormal structure of lithium in the electrochemical element 24.
- an abnormal structure is a lithium aggregate that appears irreversibly during cycling.
- the abnormal structure detected is, for example, a lithium aggregate.
- An aggregate is a set of lithium atoms having a certain cohesion between them and forming a compact whole.
- the abnormal structure detected is, for example, a lithium dendrite.
- Lithium dendrites are metallic microstructures that form in the electrochemical system during the charging process. For example, lithium dendrites form when extra lithium ions accumulate on the anode surface and cannot be absorbed into the anode in time.
- the calculator 30 searches, for example, for specific line shapes in a spectrum. These shapes correspond to abnormal structures.
- the calculator 30 can look for specific patterns in a spectral image, that is to say an image representing the spatial variation of a spectrum.
- Such an analysis can in particular be carried out using a mathematical calculation tool such as Matlab®.
- the calculator 30 calculates a parameter linked to the state of health of the electrochemical element 12 depending on the presence detected or not of an abnormal structure.
- the calculated parameter is a binary parameter, a first value indicating the presence of an abnormal structure and a second value indicating the absence of an abnormal structure.
- the calculated parameter is the number of abnormal structures detected.
- the parameter depends on the number of abnormal structures detected.
- the calculated parameter is a first value if the number of abnormal structures detected is strictly less than a first threshold, a second value if the number of abnormal structures detected is between the first threshold and a second threshold and the third value if the number of abnormal structures detected is strictly greater than the second threshold.
- the characterization process thus makes it possible to observe the appearance of lithium aggregates or dendrites within electrochemical elements 24 of an all-solid or hybrid battery.
- the characterization process does not require dismantling. Indeed, internal pressures between 1 bar and 30 bars are exerted during the operation of the electrochemical element 24 and the return to atmospheric pressure can create significant changes in the molecular structure of the materials of the element. electrochemical 24. Such changes are likely to modify the presence of abnormal structures.
- the characterization process has very good spatial resolution of the order of a micrometer.
- the optimization of the operating conditions of an electrochemical element 24 can be considered.
- the growth of lithium dendrites is influenced by several parameters, including current density, temperature, electrolyte and electrolyte convection. These factors determine the dynamics of the electrolyte.
- electrochemical elements there are various parameters, such as the nature of the materials used for the electrodes and the electrolyte, the shape of the electrodes or the electrolyte reservoir.
- the characterization process will facilitate such selection work by making it possible to carry out operational tests.
- the characterization process comprises an acquisition step E100, an analysis step E102, a determination step E104 and a calculation step E106.
- the calculator 30 determines at least one property of each abnormal structure detected.
- the characteristics of the signal obtained by the RPE data give indications on the local environment of the electron detected. There is in particular a correlation between the shape, the magnetic field at which the signal appears and the morphology of the metallic lithium deposits.
- the calculator 30 finds the position of each abnormal structure detected.
- the position is, for example, expressed as the coordinates of the geometric center of the anomalous structure.
- the calculator 30 calculates a parameter linked to the state of health of the electrochemical element 12 as a function of the presence detected or not of an abnormal structure but it also takes into account the determined property of each abnormal structure detected.
- a value could be determined depending on the number of abnormal structures and their nature (typically a very large dendrite corresponds to a poor state of health compared to a short dendrite).
- the characterization process comprises an acquisition step E200, a measurement step E202, an analysis step E204 and a calculation step E206.
- the acquisition step E200 of the characterization method of Figure 5 is similar to the acquisition step E10 of the characterization method of Figure 1, so that the same remarks apply and are not repeated in this following.
- the characterization device 22 measures the temporal evolution of a physical quantity of the electrochemical element 24.
- the physical quantity is the pressure within the electrochemical element 24 and it is measured using a pressure probe, in particular an in-situ probe positioned in the enclosure of the electrochemical element 24.
- Such a pressure probe is capable of communicating with the computer 30 by non-wired communication.
- the data acquired then also includes the temporal evolution of the physical quantity.
- the calculator 30 analyzes the RPE data and the measured time evolution to detect the presence or absence of an abnormal structure of lithium in the electrochemical element 24.
- the evolution of pressure is a sign of heat dissipation and heat can be the manifestation of the presence of an abnormal structure.
- the calculation step E206 of the characterization method of Figure 5 is similar to the calculation step E14 of the characterization method of Figure 1, so that the same remarks apply and are not repeated in what follows .
- the characterization process which has just been described makes it possible to characterize in operando the state of health of an electrochemical element of an all-solid-state or hybrid battery.
- the process has been described with reference to a lithium battery, the process can be used for any element having paramagnetic properties, that is to say the process can be used generally for a lithium battery.
- a paramagnetic element In particular, the paramagnetic element could be copper or sodium.
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Secondary Cells (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- High Energy & Nuclear Physics (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2207037A FR3137759B1 (fr) | 2022-07-08 | 2022-07-08 | Procédé de caractérisation de l’état de santé d’une batterie au lithium avec un électrolyte à l’état solide ou gélifié et dispositifs associés |
| PCT/EP2023/068764 WO2024008888A1 (fr) | 2022-07-08 | 2023-07-06 | Procédé de caractérisation de l'état de santé d'une batterie au lithium avec un électrolyte à l'état solide ou gélifié et dispositifs associés |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4552175A1 true EP4552175A1 (fr) | 2025-05-14 |
Family
ID=83355447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23735346.1A Withdrawn EP4552175A1 (fr) | 2022-07-08 | 2023-07-06 | Procédé de caractérisation de l'état de santé d'une batterie au lithium avec un électrolyte à l'état solide ou gélifié et dispositifs associés |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4552175A1 (fr) |
| FR (1) | FR3137759B1 (fr) |
| WO (1) | WO2024008888A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3165316A1 (fr) * | 2024-07-30 | 2026-02-06 | Totalenergies Onetech | Système et procédé de contrôle non-destructif du vieillissement d’un accumulateur en fonctionnement |
| KR20260050429A (ko) * | 2024-10-08 | 2026-04-15 | 삼성에스디아이 주식회사 | 이차 전지 검사 장치, 이차 전지 검사 방법 및 이차 전지 제조 방법 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013185894A (ja) * | 2012-03-07 | 2013-09-19 | Toyota Central R&D Labs Inc | 検出方法、検出装置及びプログラム |
| WO2015031621A1 (fr) * | 2013-08-30 | 2015-03-05 | Robert Bosch Gmbh | Cellule électrochimique avec capteur magnétique |
-
2022
- 2022-07-08 FR FR2207037A patent/FR3137759B1/fr not_active Expired - Fee Related
-
2023
- 2023-07-06 WO PCT/EP2023/068764 patent/WO2024008888A1/fr not_active Ceased
- 2023-07-06 EP EP23735346.1A patent/EP4552175A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| FR3137759A1 (fr) | 2024-01-12 |
| FR3137759B1 (fr) | 2024-07-26 |
| WO2024008888A1 (fr) | 2024-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Lu et al. | The timescale identification decoupling complicated kinetic processes in lithium batteries | |
| Huang et al. | Onboard early detection and mitigation of lithium plating in fast-charging batteries | |
| Liu et al. | Bridging multiscale characterization technologies and digital modeling to evaluate lithium battery full lifecycle | |
| Puls et al. | Benchmarking the reproducibility of all-solid-state battery cell performance | |
| Birkl et al. | A parametric open circuit voltage model for lithium ion batteries | |
| Aktekin et al. | SEI growth on Lithium metal anodes in solid-state batteries quantified with coulometric titration time analysis | |
| Merryweather et al. | Operando optical tracking of single-particle ion dynamics in batteries | |
| Li et al. | The importance of degradation mode analysis in parameterising lifetime prediction models of lithium-ion battery degradation | |
| Wang et al. | Estimation of state of health of lithium-ion batteries based on charge transfer resistance considering different temperature and state of charge | |
| O’Kane et al. | Physical origin of the differential voltage minimum associated with lithium plating in Li-ion batteries | |
| Stolz et al. | Different efforts but similar insights in battery R&D: electrochemical impedance spectroscopy vs galvanostatic (constant current) technique | |
| Keil et al. | Calendar aging of lithium-ion batteries: I. impact of the graphite anode on capacity fade | |
| Li et al. | State‐of‐health prediction for lithium‐ion batteries via electrochemical impedance spectroscopy and artificial neural networks | |
| EP4552175A1 (fr) | Procédé de caractérisation de l'état de santé d'une batterie au lithium avec un électrolyte à l'état solide ou gélifié et dispositifs associés | |
| Xu et al. | Investigation of lithium-ion battery degradation by corrected differential voltage analysis based on reference electrode | |
| Liu et al. | Interpretable learning of accelerated aging in lithium metal batteries | |
| Hamar et al. | Anode potential estimation in lithium-ion batteries using data-driven models for online applications | |
| Xu et al. | Chemical strain of graphite-based anode during lithiation and delithiation at various temperatures | |
| Ma et al. | Operando microscopy diagnosis of the onset of lithium plating in transparent lithium-ion full cells | |
| FR3128316A1 (fr) | Prédiction de l’état de santé d’un dispositif électrochimique par mesure de sa chute de capacité | |
| Hellar et al. | Direct observation of Mn-ion dissolution from LiMn2O4 lithium battery cathode to electrolyte | |
| Duan et al. | Degradation diagnosis of Li (Ni0. 5Mn0. 2Co0. 3) O2/li half-cell by identifying physical parameter evolution profile using impedance spectra during cycling | |
| CN121142381B (zh) | 一种基于电化学模型的锂电池剩余寿命预测方法及系统 | |
| EP4330695B1 (fr) | Procede de prediction par intelligence artificielle de la duree de vie restante d'un element electrochimique de batterie et dispositifs associes | |
| Stapf et al. | Is silicon replaceable? A physical, chemical, and electrochemical analysis of different commercial lithium-ion battery cells |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 20250108 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20250819 |