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
  • H01M10/44—Methods for charging or discharging
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
  • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
  • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
  • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
  • B60L58/13—Maintaining the SoC within a determined range
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
  • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
  • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
  • B60L58/16—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
• • 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
  • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
  • B60L2240/00—Control parameters of input or output; Target parameters
  • B60L2240/40—Drive Train control parameters
  • B60L2240/54—Drive Train control parameters related to batteries
• • 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
  • H01M10/44—Methods for charging or discharging
  • H01M10/445—Methods for charging or discharging in response to gas pressure
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M2220/00—Batteries for particular applications
  • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane

Definitions

• the object of the invention is to overcome the drawbacks of the prior art by proposing a method making it possible to increase the duration of use of a battery beyond the threshold aging level.
• the invention thus relates, in its broadest sense, to a method for extending the duration of use of a battery comprising a plurality of cells.
• the method comprises the steps, executed by a computer, of: determining a force applied to a wall of at least one cell of the battery, determining a maximum authorized state of charge of the at least one cell as a function of the determined applied force.
• the maximum authorized state of charge is defined as a function of the applied force determined on the wall of the cell.
• the overall force formed by the determined applied force plus the additional force generated by the maximum authorized load state, by decreasing the load state. maximum load allowed. The invention thus makes it possible to use batteries up to higher aging.
• the method according to the invention may have one or more additional characteristics among the following, considered individually or according to all technically possible combinations.
• the maximum authorized state of charge is determined so as to apply to the wall of the cell, an additional force due to an expansion of the cell below a predetermined threshold force less the determined applied force.
• the predetermined threshold force is between 20kN and 30kN.
• the predetermined threshold force corresponds to an aging state of the cell of between 60% and 80% of a new state of the cell.
• the determined state of aging is a function of a ratio between a maximum quantity of electricity storable in the cell at a determined instant and a maximum quantity of electricity storable in the cell. cell in new condition; a number of cell recharges carried out; an integration of a number of hours of use of the cell multiplied by a coefficient depending on a measured cell temperature; or an accumulation of energy charged or discharged from the cell.
• Another aspect of the invention relates to a computer arranged to communicate with a battery comprising a plurality of cells, the computer also being arranged to implement the steps of the method according to any one of the aspects of the aforementioned invention.
• FIG. 1 schematically illustrates a lithium-ion type battery module according to a state of the art.
• the battery control unit 10 communicates with a control unit 12 of an electric motor 13 and an electric charger 14.
• a third curve C3 illustrates a force applied to the wall 3 of the cell 2 as a function of a state of aging SOHc of the cell 2 + a variation of a state of charge SOC between 0% and 100% .
• a secondary reaction occurs generating a passivation layer 9 on the surface of the negative electrode 4 of cell 2.
• This passivation layer 9 increases the volume of the negative electrode 4 and generates an increase in the force applied to the wall 3 of the cell 2.
• This increase in volume, and therefore the increase in the force applied to the wall 3 of the cell 2 is irreversible and is linked to its SOHc aging state.
• the maximum authorized state of charge is determined so as to apply to the wall 3 of the cell 2 an additional force due to an expansion of the cell 2 less than or equal to a predetermined threshold force minus the determined applied force.
• the threshold force is 25kN.
• the maximum authorized state of charge (curve C4) is reduced. so that the determined applied force due to the state of aging of cell 1 (curve C1) + the additional force due to the expansion applied to wall 3 of cell 2 due to the maximum authorized load state together do not exceed the threshold force of 25kN.

Landscapes

• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Sustainable Development (AREA)
• Sustainable Energy (AREA)
• Power Engineering (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Secondary Cells (AREA)
• Battery Mounting, Suspending (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=78649403

Family Applications (1)

Country Status (4)

Families Citing this family (1)

Family Cites Families (5)

• 2021
  • 2021-09-02 FR FR2109165A patent/FR3126503B1/fr active Active
• 2022
  • 2022-07-11 WO PCT/FR2022/051386 patent/WO2023031527A1/fr not_active Ceased
  • 2022-07-11 EP EP22755245.2A patent/EP4396887A1/de active Pending
  • 2022-07-11 CN CN202280059600.8A patent/CN117897852A/zh active Pending

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