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Electricity management device, electricity management method, and electricity distribution system inside a house with electricity generating device, utility grid connection, and electric vehicle containing a rechargeable battery in a vehicle-to-grid connection with counter device

  • US 10,406,927 B2
  • Filed: 11/19/2012
  • Issued: 09/10/2019
  • Est. Priority Date: 11/22/2011
  • Status: Active Grant
First Claim
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1. An electricity management device, comprising:

  • an electricity accumulator which increases a counter value as a rechargeable battery of an electric vehicle is charged from grid power that is supplied from an electrical grid and retains the counter value when the rechargeable battery of the electric vehicle is charged from electricity that is generated by an electricity generation device of a house that generates electricity without producing CO2; and

    which reduces the counter value as electricity in the rechargeable battery of the electric vehicle is discharged into the house,a controller which performs control so that the electricity in the rechargeable battery of the electric vehicle is discharged into the house until the counter value becomes a predetermined target value, anda travel distance acquisition unit acquiring travel distance of the electric vehicle,wherein;

    a carbon dioxide emission coefficient and a counter target value are previously set, the carbon dioxide emission coefficient indicating an amount of carbon dioxide emissions per unit of the grid power, and the counter target value corresponding to an amount of carbon dioxide emissions per unit of the travel distance by the electric vehicle,the electricity accumulator adds a value to the counter value, the added value is obtained by multiplying the amount of charging electricity of the rechargeable battery of the electric vehicle from the grid power by the carbon dioxide emission coefficient and dividing the obtained product by the travel distance acquired by the travel distance acquisition unit, andthe controller performs control so that the electricity in the rechargeable battery of the electric vehicle is discharged into the house until the counter value becomes the counter target value corresponding to the amount of carbon dioxide emissions per unit of the travel distance of the electric vehicle.

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