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Managing electrical current allocation between charging equipment for charging electric vehicles

  • US 9,469,211 B2
  • Filed: 12/01/2015
  • Issued: 10/18/2016
  • Est. Priority Date: 07/23/2009
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • determining a maximum amount of electric current supported by a single electrical circuit, wherein a first charging equipment and the second charging equipment are each wired on the single electrical circuit; and

    dynamically allocating electric current to the first charging equipment and to the second charging equipment such that the maximum amount of electric current supported by the single electrical circuit is prevented from being exceeded, wherein dynamically allocating electric current to the first charging equipment includes communicating a first current limit to a first electric vehicle connected to the first charging equipment to cause the first electric vehicle to limit its current draw to not exceed the first current limit, and wherein dynamically allocating electric current to the second charging equipment includes communicating a second current limit to a second electric vehicle connected to the second charging equipment to cause the second electric vehicle to limit its current draw to not exceed the second current limit, and wherein a sum of current being drawn at the first current limit and the second current limit does not exceed the maximum amount of electric current supported by the single electrical circuit.

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