Power Supply System and Vehicle
First Claim
Patent Images
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; and
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,at least one of said plurality of voltage conversion units having voltage conversion capability different from that of other of said plurality of voltage conversion units,each of said plurality of voltage conversion units being controlled by a control system including a first feedback unit performing said voltage conversion operation such that a current value or voltage value generated by said voltage conversion operation matches a prescribed reference value,a control gain in said first feedback unit being determined such that time taken from when a standard reference value is applied to said first feedback unit to when a current value or voltage value generated by said voltage conversion operation in corresponding said voltage conversion unit reaches a standard output value substantially matches time taken from when the standard reference value is applied to another said first feedback unit to when a current value or voltage value generated by said voltage conversion operation in corresponding another said voltage conversion unit reaches the standard output value.
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Abstract
Transfer functions of control have duty commands as inputs and battery current values as outputs, provided corresponding to respected converters. Control gains are determined such that certain transfer functions substantially match with each other, with respect to delay elements.
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Citations
17 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; and 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, at least one of said plurality of voltage conversion units having voltage conversion capability different from that of other of said plurality of voltage conversion units, each of said plurality of voltage conversion units being controlled by a control system including a first feedback unit performing said voltage conversion operation such that a current value or voltage value generated by said voltage conversion operation matches a prescribed reference value, a control gain in said first feedback unit being determined such that time taken from when a standard reference value is applied to said first feedback unit to when a current value or voltage value generated by said voltage conversion operation in corresponding said voltage conversion unit reaches a standard output value substantially matches time taken from when the standard reference value is applied to another said first feedback unit to when a current value or voltage value generated by said voltage conversion operation in corresponding another said voltage conversion unit reaches the standard output value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. 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; and 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, at least one of said plurality of voltage conversion units having voltage conversion capability different from that of other of said plurality of voltage conversion units, each of said plurality of voltage conversion units being controlled by a control system including a first feedback unit performing said voltage conversion operation such that a current value or voltage value generated by said voltage conversion operation matches a prescribed reference value, a control gain in said first feedback unit being determined such that time taken from when a standard reference value is applied to said first feedback unit to when a current value or voltage value generated by said voltage conversion operation in corresponding said voltage conversion unit reaches a standard output value substantially matches time taken from when the standard reference value is applied to another said first feedback unit to when a current value or voltage value generated by said voltage conversion operation in corresponding another said voltage conversion unit reaches the standard output value. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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Specification