Vehicle Power Controller
First Claim
1. A power controller for a vehicle including a rotating electric machine for running that generates regenerative power of a voltage higher than rated voltage of a secondary battery at the time of braking, comprising:
- an inverter connected to said rotating electric machine and converting and outputting said regenerative power;
a converter connected between said inverter and said secondary battery, converting the voltage of said converted regenerative power to a rated voltage of said secondary battery and outputting the resulting voltage;
a capacitor connected between said converter and said inverter in parallel with said secondary battery, having larger rated charging/discharging power and smaller storage capacity than said secondary battery;
a switching unit switched to charge either said secondary battery or said capacitor with priority; and
an operation unit connected to said switching unit;
whereinsaid operation unit determines whether said regenerative power is not lower than a predetermined value, and controls said switching unit such that said secondary battery is charged with priority if it is determined to be not lower than said predetermined value, and said capacitor is charged with priority if it is determined to be lower than said predetermined value.
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Accused Products
Abstract
An ECU executes a program including the steps of: calculating regenerative power value P based on a brake pressure (S100); calculating limit charging power WIN(B) to a battery (S102); calculating limit charging power WIN(C) to a capacitor (S104); when it is determined that regenerative power value P is larger than the sum of WIN(B) and WIN(C) (YES at S106), estimating (S108) that a large regenerative energy sufficient to fully charge the capacitor even if the battery is charged with priority would be generated; and transmitting a control signal (S110) to set output voltage of a boost converter to be not higher than the voltage of the capacitor so as to charge the battery with priority.
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Citations
20 Claims
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1. A power controller for a vehicle including a rotating electric machine for running that generates regenerative power of a voltage higher than rated voltage of a secondary battery at the time of braking, comprising:
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an inverter connected to said rotating electric machine and converting and outputting said regenerative power; a converter connected between said inverter and said secondary battery, converting the voltage of said converted regenerative power to a rated voltage of said secondary battery and outputting the resulting voltage; a capacitor connected between said converter and said inverter in parallel with said secondary battery, having larger rated charging/discharging power and smaller storage capacity than said secondary battery; a switching unit switched to charge either said secondary battery or said capacitor with priority; and an operation unit connected to said switching unit;
whereinsaid operation unit determines whether said regenerative power is not lower than a predetermined value, and controls said switching unit such that said secondary battery is charged with priority if it is determined to be not lower than said predetermined value, and said capacitor is charged with priority if it is determined to be lower than said predetermined value. - View Dependent Claims (2, 3, 4)
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5. A power controller for a vehicle including a rotating electric machine for running that generates regenerative power of a voltage higher than rated voltage of a secondary battery at the time of braking, comprising:
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an inverter connected to said rotating electric machine and converting and outputting said regenerative power; a converter connected between said inverter and said secondary battery, converting the voltage of said converted regenerative power to a rated voltage of said secondary battery and outputting the resulting voltage; a capacitor connected between said converter and said inverter in parallel with said secondary battery, having larger rated charging/discharging power and smaller storage capacity than said secondary battery; a switching unit switched to charge either said secondary battery or said capacitor with priority; and an operation unit connected to said switching unit;
whereinsaid operation unit estimates whether a large regenerative energy sufficient to charge said capacitor with electric energy not smaller than a predetermined value, even if said secondary battery is charged with priority, would be generated, and controls said switching unit such that said secondary battery is charged with priority if it is estimated that said large regenerative energy would be generated, and said capacitor is charged with priority if it is estimated that said large regenerative energy would not be generated. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A power controller for a vehicle including a rotating electric machine for running that generates regenerative power of a voltage higher than rated voltage of a secondary battery at the time of braking, comprising:
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an inverter connected to said rotating electric machine and converting and outputting said regenerative power; a converter connected between said inverter and said secondary battery, converting the voltage of said converted regenerative power to a rated voltage of said secondary battery and outputting the resulting voltage; a capacitor connected between said converter and said inverter in parallel with said secondary battery, having larger rated charging/discharging power and smaller storage capacity than said secondary battery; switching means switched to charge either said secondary battery or said capacitor with priority; means for determining whether said regenerative power is not lower than a predetermined value; and control means for controlling said switching means such that said secondary battery is charged with priority if it is determined to be not lower than said predetermined value, and said capacitor is charged with priority if it is determined to be lower than said predetermined value. - View Dependent Claims (12, 13, 14)
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15. A power controller for a vehicle including a rotating electric machine for running that generates regenerative power of a voltage higher than rated voltage of a secondary battery at the time of braking, comprising:
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an inverter connected to said rotating electric machine and converting and outputting said regenerative power; a converter connected between said inverter and said secondary battery, converting the voltage of said converted regenerative power to a rated voltage of said secondary battery and outputting the resulting voltage; a capacitor connected between said converter and said inverter in parallel with said secondary battery, having larger rated charging/discharging power and smaller storage capacity than said secondary battery; switching means switched to charge either said secondary battery or said capacitor with priority; estimating means for estimating whether a large regenerative energy sufficient to charge said capacitor with electric energy not smaller than a predetermined value, even if said secondary battery is charged with priority, would be generated, and control means for controlling said switching unit such that said secondary battery is charged with priority if it is estimated that said large regenerative energy would be generated, and said capacitor is charged with priority if it is estimated that said large regenerative energy would not be generated. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification