A maximum dischageable current Idmax obtained when electric power output from a battery is increased from a battery current Ib and a battery voltage Vb at present under internal resistance R at present (an operating point 510) until the battery voltage reaches a lower limit voltage Ve (an operating point 520), is shown as follows: Idmax = Ib + (Vb - Ve) / R. Therefore, in accordance with multiplication of the lower limit voltage Ve and the maximum dischageable current Idmax, it is possible to predict maximum dischargeable electric power at which the battery voltage does not become lower than the lower limit voltage even if discharge limitation is temporarily relaxed, as a relative value with respect to the battery voltage and the battery current at present. When the discharge electric power limitation for the battery (the power storage device) is temporarily relaxed in accordance with a discharge request made by a load, a discharge electric power permissible value is set to correspond to the maximum dischargeable electric power, such that the output voltage of the power storage device does not fall outside a controlled voltage range from the lower limit voltage to an upper limit voltage.
STORAGE BATTERY CHARGING/DISCHARGING CONTROLLER, CHARGING/DISCHARGING CONTROL METHOD, AND ELECTRICALLY DRIVEN VEHICLE
LADE-/ENTLADESTEUERUNG FÜR EINE SPEICHERBATTERIE, LADE-/ENTLADUNGSSTEUERVERFAHREN UND ELEKTRISCH ANGETRIEBENES FAHRZEUG
DISPOSITIF DE CONTRÔLE DE LA CHARGE/DÉCHARGE D'UNE BATTERIE D'ACCUMULATEURS, PROCÉDÉ DE CONTRÔLE DE LA CHARGE/DÉCHARGE ET VÉHICULE ÉLECTRIQUE
16.12.2015
Patent
Elektronische Ressource
Englisch
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY |
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