Power supply system and vehicle
First Claim
1. A power supply system having a plurality of power storage units each configured to be chargeable/dischargeable, comprising:
- a power line configured to allow supply/reception of electric power between a load device and said power supply system;
a plurality of voltage conversion units provided between said plurality of power storage units and said power line, respectively, and each performing voltage conversion operation between corresponding said power storage unit and said power line;
power storage voltage value obtaining means obtaining a power storage voltage value for each of said plurality of power storage units; and
voltage reference value determination means determining a voltage reference value of electric power to be supplied to said load device in accordance with torque and rotation speed values of said load device,each of said plurality of voltage conversion units performing said voltage conversion operation in accordance with said voltage reference value determined by said voltage reference value determination means so that a voltage supplied to the load device is substantially equal to the voltage reference value,said voltage reference value determination means limiting said voltage reference value not to fall below the maximum power storage voltage value of said power storage voltage values obtained by said power storage voltage value obtaining means.
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Accused Products
Abstract
A maximum value selection unit (50) receives battery voltage values (Vb1, Vb2) and outputs the maximum value thereof to a lower limit value limiting unit (54). A maximum value selection unit (52) receives required voltage values (Vm1*, Vm2*) and outputs the maximum value thereof to the lower limit value limiting unit (54). The lower limit value limiting unit (54) outputs a voltage reference value (Vh*) by limiting the value so as not to fall below an output value of the maximum value selection unit (50). Switching commands (PWC1, PWC2) are generated based on a control computation using a combination of a voltage feedback control element and a voltage feedforward element, and a control computation using a combination of a current feedback control element and a voltage feedforward element, respectively.
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Citations
15 Claims
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1. A power supply system having a plurality of power storage units each configured to be chargeable/dischargeable, comprising:
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a power line configured to allow supply/reception of electric power between a load device and said power supply system; a plurality of voltage conversion units provided between said plurality of power storage units and said power line, respectively, and each performing voltage conversion operation between corresponding said power storage unit and said power line; power storage voltage value obtaining means obtaining a power storage voltage value for each of said plurality of power storage units; and voltage reference value determination means determining a voltage reference value of electric power to be supplied to said load device in accordance with torque and rotation speed values of said load device, each of said plurality of voltage conversion units performing said voltage conversion operation in accordance with said voltage reference value determined by said voltage reference value determination means so that a voltage supplied to the load device is substantially equal to the voltage reference value, said voltage reference value determination means limiting said voltage reference value not to fall below the maximum power storage voltage value of said power storage voltage values obtained by said power storage voltage value obtaining means. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A power supply system having a plurality of power storage units each configured to be chargeable/dischargeable, comprising:
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a power line configured to allow supply/reception of electric power between a load device and said power supply system; a plurality of voltage conversion units provided between said plurality of power storage units and said power line, respectively, and each performing voltage conversion operation between corresponding said power storage unit and said power line; a power storage voltage value detection unit detecting a power storage voltage value for each of said plurality of power storage units; and a control unit, said control unit determining a voltage reference value of electric power to be supplied to said load device in accordance with torque and rotation speed values of said load device, each of said plurality of voltage conversion units performing said voltage conversion operation in accordance with said voltage reference value determined by said control unit so that a voltage supplied to the load device is substantially equal to the voltage reference value, said control unit limiting said voltage reference value not to fall below the maximum power storage voltage value of said power storage voltage values detected by said power storage voltage value detection unit.
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8. A vehicle, comprising:
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a power supply system having a plurality of power storage units each configured to be chargeable/dischargeable; and a drive force generation unit receiving electric power supplied from said power supply system to generate drive force, said power supply system including; a power line configured to allow supply/reception of electric power between said drive force generation unit and said power supply system; a plurality of voltage conversion units provided between said plurality of power storage units and said power line, respectively, and each performing voltage conversion operation between corresponding said power storage unit and said power line; power storage voltage value obtaining means obtaining a power storage voltage value for each of said plurality of power storage units; and voltage reference value determination means determining a voltage reference value of electric power to be supplied to said drive force generation unit in accordance with torque and rotation speed values of said drive force generation unit, each of said plurality of voltage conversion units performing said voltage conversion operation in accordance with said voltage reference value determined by said voltage reference value determination means so that a voltage supplied to the drive force generation unit is substantially equal to the voltage reference value, said voltage reference value determination means limiting said voltage reference value not to fall below the maximum power storage voltage value of said power storage voltage values obtained by said power storage voltage value obtaining means. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A vehicle, comprising:
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a power supply system having a plurality of power storage units each configured to be chargeable/dischargeable; and a drive force generation unit receiving electric power supplied from said power supply system to generate drive force, said power supply system including; a power line configured to allow supply/reception of electric power between said drive force generation unit and said power supply system; a plurality of voltage conversion units provided between said plurality of power storage units and said power line, respectively, and each performing voltage conversion operation between corresponding said power storage unit and said power line; power storage voltage value detection unit detecting a power storage voltage value for each of said plurality of power storage units; and a control unit, said control unit determining a voltage reference value of electric power to be supplied to said drive force generation unit in accordance with torque and rotation speed values of said drive force generation unit, each of said plurality of voltage conversion units performing said voltage conversion operation in accordance with said voltage reference value determined by said control unit so that a voltage supplied to the load device is substantially equal to the voltage reference value, and said control unit limiting said voltage reference value not to fall below the maximum power storage voltage value of said power storage voltage values detected by said power storage voltage value detection unit.
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Specification