Power supply system, vehicle using the same and its control method
First Claim
Patent Images
1. A power supply system, having a plurality of rechargeable electric storage units, comprising:
- a power line formed to allow transfer of electric power between a load device and said power supply system;
a plurality of voltage converting units provided between each of said plurality of electric storage units and said power line, each performing a voltage converting operation between the corresponding said electric storage unit and said power line, each of said plurality of voltage converting units executing said voltage converting operation in accordance with a control system including a history element outputting a control value determined dependent on a previous value of said control value;
an operation mode selecting unit selecting, in response to a power request from said load device, an operation mode in which the voltage converting operation of at least one voltage converting unit included in said plurality of voltage converting units is suspended; and
a voltage converting operation control unit controlling execution and suspension of the voltage converting operation of each of said plurality of voltage converting units based on a status value of corresponding one of said electric storage units, when said operation mode is selected;
whereinsaid voltage converting operation control unit sets, when said voltage converting operation is to be resumed at the suspended voltage converting unit, a prescribed initial value determined independent from said control value stored in corresponding said history element before resumption, to corresponding said history element.
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Abstract
An integral element corresponding to a converter continues an integral operation even in a period in which a voltage converting operation of the converter is suspended. The integral output integrated in this period is invalid data. Therefore, if the invalid integral output is provided from the integral element at a time at which the voltage converting operation of the converter is resumed, it follows that the converter would be controlled by an irrelevant control value. Therefore, as described above, the voltage converting operation control unit applies a reset signal to the integral element to zero-clear the stored integral output.
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Citations
14 Claims
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1. A power supply system, having a plurality of rechargeable electric storage units, comprising:
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a power line formed to allow transfer of electric power between a load device and said power supply system; a plurality of voltage converting units provided between each of said plurality of electric storage units and said power line, each performing a voltage converting operation between the corresponding said electric storage unit and said power line, each of said plurality of voltage converting units executing said voltage converting operation in accordance with a control system including a history element outputting a control value determined dependent on a previous value of said control value; an operation mode selecting unit selecting, in response to a power request from said load device, an operation mode in which the voltage converting operation of at least one voltage converting unit included in said plurality of voltage converting units is suspended; and a voltage converting operation control unit controlling execution and suspension of the voltage converting operation of each of said plurality of voltage converting units based on a status value of corresponding one of said electric storage units, when said operation mode is selected;
whereinsaid voltage converting operation control unit sets, when said voltage converting operation is to be resumed at the suspended voltage converting unit, a prescribed initial value determined independent from said control value stored in corresponding said history element before resumption, to corresponding said history element. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A vehicle, comprising:
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a power supply system having a plurality of rechargeable electric storage units; and a driving force generating unit receiving electric power supplied from said power supply system and generating driving force;
whereinsaid power supply system includes; a power line formed to allow transfer of electric power between said driving force generating unit and said power supply system, a plurality of voltage converting units provided between each of said plurality of electric storage units and said power line, each performing a voltage converting operation between the corresponding said electric storage unit and said power line, each of said plurality of voltage converting units executing said voltage converting operation in accordance with a control system including a history element outputting a control value determined dependent on a previous value of said control value, an operation mode selecting unit selecting, in response to a power request from said driving force generating unit, an operation mode in which the voltage converting operation of at least one voltage converting unit included in said plurality of voltage converting units is suspended, and a voltage converting operation control unit controlling execution and suspension of the voltage converting operation of each of said plurality of voltage converting units based on a status value of corresponding one of said electric storage units, when said operation mode is selected;
whereinsaid voltage converting operation control unit sets, when said voltage converting operation is to be resumed at the suspended voltage converting unit, a prescribed initial value determined independent from said control value stored in corresponding said history element before resumption, to corresponding said history element. - View Dependent Claims (8, 9, 10)
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11. A method of controlling a power supply system having a plurality of rechargeable electric storage units, wherein
said power supply system includes a power line formed to allow transfer of electric power between a load device and said power supply system, and a plurality of voltage converting units provided between each of said plurality of electric storage units and said power line, each performing a voltage converting operation between the corresponding said electric storage unit and said power line; - and
each of said plurality of voltage converting units executes said voltage converting operation in accordance with a control system including a history element outputting a control value determined dependent on a previous value of said control value; said control method comprising the steps of; selecting an operation mode in which the voltage converting operation of at least one voltage converting unit included in said plurality of voltage converting units is suspended, in response to a power request from said load device; and controlling execution and suspension of the voltage converting operation of each of said plurality of voltage converting units based on a status value of corresponding one of said electric storage units, when said operation mode is selected;
whereinsaid controlling step includes the step of setting, when said voltage converting operation is to be resumed at the suspended voltage converting unit, a prescribed initial value determined independent from said control value stored in corresponding said history element before resumption, to corresponding said history element. - View Dependent Claims (12, 13, 14)
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Specification