System for battery charging based on cost and life
First Claim
1. A battery charging system, comprising:
- a battery;
an electric vehicle, the battery coupled to a propulsion motor configured to propel the electric vehicle;
a charging circuit to charge the battery;
a charging cost circuit, wherein said charging cost circuit controls operation of said charging circuit; and
a timer circuit coupled to said charging cost circuit, wherein said timer circuit provides a plurality of timing signals to said charging cost circuit, said plurality of timing signals corresponding to at least a first time period and a second time period, wherein said second time period follows said first time period, and wherein the charging cost circuit turns on the charging circuit during said first time period in which the charging cost rate is below a first threshold and continues operation of said charging circuit until the battery reaches a first energy stored level, wherein the charging cost circuit terminates the charging circuit operation during said first time period only after said first energy stored level is reached, wherein the charging cost circuit pauses operation of said charging circuit whenever said charging cost rate is above the first threshold, and wherein the charging cost circuit turns on the charging circuit during said second time period in which the charging cost rate is above the first threshold and continues operation of said charging circuit until the battery reaches a second energy stored level or a user disrupts said charging circuit, wherein said second energy stored level is greater than said first energy stored level.
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Accused Products
Abstract
One embodiment of the present subject matter includes a system that includes a battery, an electric vehicle, the battery coupled to the electric vehicle to propel the electric vehicle, and a charging circuit to charge the battery. The embodiment includes a charging cost circuit to estimate a charging cost rate and to turn on the charging circuit. The embodiment also includes a timer circuit to provide a time signal to the charging cost circuit. The embodiment is configured such that the charging cost circuit is to turn on the charging circuit during a first time period in which the charging cost rate is below a first threshold until the battery reaches a first energy stored level, and to turn on the charging circuit during a second time period in which the charging cost rate is above the first threshold.
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Citations
24 Claims
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1. A battery charging system, comprising:
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a battery; an electric vehicle, the battery coupled to a propulsion motor configured to propel the electric vehicle; a charging circuit to charge the battery; a charging cost circuit, wherein said charging cost circuit controls operation of said charging circuit; and a timer circuit coupled to said charging cost circuit, wherein said timer circuit provides a plurality of timing signals to said charging cost circuit, said plurality of timing signals corresponding to at least a first time period and a second time period, wherein said second time period follows said first time period, and wherein the charging cost circuit turns on the charging circuit during said first time period in which the charging cost rate is below a first threshold and continues operation of said charging circuit until the battery reaches a first energy stored level, wherein the charging cost circuit terminates the charging circuit operation during said first time period only after said first energy stored level is reached, wherein the charging cost circuit pauses operation of said charging circuit whenever said charging cost rate is above the first threshold, and wherein the charging cost circuit turns on the charging circuit during said second time period in which the charging cost rate is above the first threshold and continues operation of said charging circuit until the battery reaches a second energy stored level or a user disrupts said charging circuit, wherein said second energy stored level is greater than said first energy stored level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of charging a battery within an electric vehicle utilizing a battery charging system, the method comprising the steps of:
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estimating cost rates for at least a first time period and a second time period, wherein said first time period precedes said second time period, wherein an estimated cost rate for said first time period is less than said estimated cost rate for said second time period, and wherein a charging stop time is anticipated to occur within said second time period; initiating battery charging within said first time period; pausing battery charging within said first time period whenever a measured cost rate exceeds said estimated cost rate for said first time period; terminating battery charging within said first time period only after said battery reaches a first state of charge; initiating battery charging within said second time period; and terminating battery charging within said second time period after said battery reaches a second state of charge, wherein said second state of charge is greater than said first state of charge. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification