METHOD OF CONTROLLING AN ENERGY STORAGE UNIT IN A VEHICLE MICRO-HYBRID SYSTEM
First Claim
1. Method of controlling a supercapacitor energy storage unit (12) included in a motor vehicle micro-hybrid system suitable for performing functions of an alternator, starter and automatic stop-restart of the vehicle heat engine, regenerative braking and torque assistance, said enemy storage unit (12) comprising a plurality of supercapacitor elementary cells connected in series (C1 to C10) and delivering information (Vmax, Temp and DeltaV) on its internal status, characterised in that, said information delivered by the said energy storage unit (12) including maximum elementary voltage (Vmax) information from the most charged elementary cell (C2) and temperature (Temp) information on the temperature of the said energy storage unit (12), the method comprises the steps of:
- comparing said maximum elementary voltage (Vmax) information with a first voltage threshold (Vmax1),comparing said temperature (Temp) information with at least one temperature threshold anddeciding on a limitation of the availability of said functions when said maximum elementary voltage (Vmax) information reaches said first voltage threshold (Vmax1) for a predetermined duration (T) and/or when said temperature (Temp) information reaches said at least one temperature threshold.
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Abstract
A method of controlling a supercapacitor energy storage unit (12), included in a motor vehicle micro-hybrid system, is disclosed. The storage unit is suitable for performing the functions of an alternator, starter and automatic stop-restart of the vehicle heat engine, regenerative braking and torque assistance. The energy storage unit (12) is a plurality of supercapacitor elementary cells connected in series (C1 to C10) and capable of delivering information (Vmax, Temp and DeltaV) on its internal status. The method includes various stages of: comparing a maximum elementary voltage (Vmax) with a first voltage threshold (Vmax1); comparing a temperature (Temp) with at least one temperature threshold (ST1=55° C., ST2=65° C. and ST3=70° C.); and, deciding on limitations of the availability of functions of the unit when the (Vmax) information reaches threshold (Vmax1) for a predetermined duration (T) and/or when the (Temp) information reaches the temperature threshold (ST1=55° C., ST2=65° C. and ST3=70° C.).
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Citations
9 Claims
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1. Method of controlling a supercapacitor energy storage unit (12) included in a motor vehicle micro-hybrid system suitable for performing functions of an alternator, starter and automatic stop-restart of the vehicle heat engine, regenerative braking and torque assistance, said enemy storage unit (12) comprising a plurality of supercapacitor elementary cells connected in series (C1 to C10) and delivering information (Vmax, Temp and DeltaV) on its internal status, characterised in that, said information delivered by the said energy storage unit (12) including maximum elementary voltage (Vmax) information from the most charged elementary cell (C2) and temperature (Temp) information on the temperature of the said energy storage unit (12), the method comprises the steps of:
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comparing said maximum elementary voltage (Vmax) information with a first voltage threshold (Vmax1), comparing said temperature (Temp) information with at least one temperature threshold and deciding on a limitation of the availability of said functions when said maximum elementary voltage (Vmax) information reaches said first voltage threshold (Vmax1) for a predetermined duration (T) and/or when said temperature (Temp) information reaches said at least one temperature threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. Motor vehicle micro-hybrid system comprising:
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an energy storage unit (12) providing the functionality of an alternator, starter and automatic stop-restart of a vehicle heat engine, regenerative braking and torque assistance and having a plurality of supercapacitor elementary cells connected in series (C1 to C10) and delivering information (Vmax, Temp and DeltaV) on its internal status, characterised in that said energy storage unit (12) comprises means (141) suitable for; comparing means for comparing said (Vmax) information with a first voltage threshold (Vmax1), second comparing means for comparing (Temp) information with at least one temperature threshold, and deciding means for deciding on a limitation of the availability of functionality of the energy storage unit when said (Vmax) information reaches said first voltage threshold (Vmax1) for a predetermined duration (T) and/or when said temperature (Temp) information reaches said at least one temperature threshold.
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Specification