Branch energy management for multiple EVSEs
First Claim
1. A distributed energy management system for managing a charge rate of an array of electric vehicle supply equipment (EVSE) which are supplied power from a common power source through a shared circuit, comprising:
- a capacity evaluator located remotely from each of the EVSEs in the array, the capacity evaluator comprising;
a sensor for measuring a current at a branch origin of the shared circuit, the current reflecting the current drawn by all loads including the array of EVSEs on the shared circuit,a threshold comparator for comparing the measured current to a capacity utilization threshold for the shared circuit to determine a present current capacity utilization of the shared circuit, anda communication device for transmitting a signal relating to the present current capacity utilization; and
the array of EVSEs on the shared circuit, each of the EVSEs comprising;
a communication device for receiving the signal from the capacity evaluator, anda controller configured to;
generate a variable update interval, andinitiate adjustment of the charge rate of the EVSE according to the variable update interval based on the present current capacity utilization of the shared circuit.
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Accused Products
Abstract
A distributed energy management method and system 100 are disclosed for managing a charge rate of an array of EVSEs 140 that share a common power source. In the disclosed method and system, control of the power sharing is distributed at the individual EVSE level. For example, each EVSE includes a communication device 540 and a controller 530. The communication device is used to receive a signal relating to a present current capacity utilization of the shared circuit, such as an indication of availability or unavailability of current capacity on the shared circuit. The controller is configured to generate a variable update interval, and initiate adjustment of the charge rate of the EVSE according to the variable update interval based on the present current capacity utilization as indicated by the received signal.
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Citations
18 Claims
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1. A distributed energy management system for managing a charge rate of an array of electric vehicle supply equipment (EVSE) which are supplied power from a common power source through a shared circuit, comprising:
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a capacity evaluator located remotely from each of the EVSEs in the array, the capacity evaluator comprising; a sensor for measuring a current at a branch origin of the shared circuit, the current reflecting the current drawn by all loads including the array of EVSEs on the shared circuit, a threshold comparator for comparing the measured current to a capacity utilization threshold for the shared circuit to determine a present current capacity utilization of the shared circuit, and a communication device for transmitting a signal relating to the present current capacity utilization; and the array of EVSEs on the shared circuit, each of the EVSEs comprising; a communication device for receiving the signal from the capacity evaluator, and a controller configured to; generate a variable update interval, and initiate adjustment of the charge rate of the EVSE according to the variable update interval based on the present current capacity utilization of the shared circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An electric vehicle supply equipment (EVSE) for managing a charge rate at which power is supplied to charge a battery of an electric vehicle (EV), comprising:
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a communication device configured to receive a signal relating to a present current capacity utilization of a shared circuit that is configured to provide power to a plurality of loads including the EVSE and an other EVSE; and a controller configured to; generate a variable update interval; and initiate adjustment of the charge rate of the EVSE according to the variable update interval based on the present current capacity utilization of the circuit. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification