Electric vehicle charger with load shedding

Abstract

Methods and apparatus for electric vehicle charger with load shedding. One embodiment provides a method of load shedding including receiving, at an electronic processor of an EV charger, an indication of an amount of current flowing through a main switchboard connected to the EV charger and determining, with the electronic processor, whether the amount of current exceeds a dynamic threshold. The method also includes reducing, using the electronic processor, a charge rating of the EV charger when the amount of current exceeds the dynamic threshold.

1 . A method of load shedding, the method comprising:
 receiving, at an electronic processor, an indication of an amount of current flowing through the electric vehicle charger;   determining, with the electronic processor, a first dynamic threshold;   determining, with the electronic processor, whether a charge rating of the electric vehicle charger is at a first charge rating;   reducing, using the electronic processor, the charge rating of the electric vehicle charger to a second charge rating when the amount of current exceeds the first dynamic threshold and when the charge rating is at the first rating;   determining, with the electronic processor, whether the amount of current is below a second dynamic threshold;   determining, with the electronic processor, whether the charge rating of the electric vehicle charger is at the second rating; and   increasing, using the electronic processor, the charge rating of the electric vehicle charger to the first rating when the amount of current is below the second dynamic threshold and the charge rating is at the second rating.   
     
     
         2 . The method of  claim 1 , wherein the first charge rating is dynamically adjusted. 
     
     
         3 . The method of  claim 1 , wherein the second charge rating is dynamically adjusted. 
     
     
         4 . The method of  claim 1 , wherein the first dynamic threshold is recomputed in real time. 
     
     
         5 . The method of  claim 1 , wherein the second dynamic threshold is recomputed in real time. 
     
     
         6 . The method of  claim 1 , wherein the current is drawn from a switchboard. 
     
     
         7 . The method of  claim 1 , wherein the electronic processor is at least one selected from the group consisting of an electronic processor of the electric vehicle charger, and electronic process of the electric vehicle, and an electronic processor of a remote computer. 
     
     
         8 . The method of  claim 1 , wherein reducing the charge rating comprises reducing a charging current of the electric vehicle charger. 
     
     
         9 . The method of  claim 1 , wherein increasing the charge rating comprises increasing a charging current of the electric vehicle charger. 
     
     
         10 . An electric vehicle charger comprising:
 a current sensor; and   an electronic processor configured to:
 receive an indication, via the current sensor, of an amount of current flowing through the electric vehicle charger; 
 determine a first dynamic threshold; 
 determine whether a charge rating of the electric vehicle charger is at a first charge rating; 
 reduce the charge rating of the electric vehicle charger to a second charge rating when the amount of current exceeds the first dynamic threshold and when the charge rating is at the first rating; 
 determine whether the amount of current is below a second dynamic threshold; 
 determine whether the charge rating of the electric vehicle charger is at the second rating; and 
 increase the charge rating of the electric vehicle charger to the first rating when the amount of current is below the second dynamic threshold and the charge rating is at the second rating 
   
     
     
         11 . The electric vehicle charger of  claim 10 , wherein the first charge rating is dynamically adjusted. 
     
     
         12 . The electric vehicle charger of  claim 10 , wherein the second charge rating is dynamically adjusted. 
     
     
         13 . The electric vehicle charger of  claim 10 , wherein the first dynamic threshold is recomputed in real time. 
     
     
         14 . The electric vehicle charger of  claim 10 , wherein the second dynamic threshold is recomputed in real time. 
     
     
         15 . The electric vehicle charger of  claim 10 , wherein the current is drawn from a switchboard. 
     
     
         16 . The electric vehicle charger of  claim 10 , wherein the electronic processor is at least one selected from the group consisting of an electronic processor of the electric vehicle charger, and electronic process of the electric vehicle, and an electronic processor of a remote computer. 
     
     
         17 . The electric vehicle charger of  claim 10 , wherein reducing the charge rating comprises reducing a charging current of the electric vehicle charger. 
     
     
         18 . The electric vehicle charger of  claim 10 , wherein increasing the charge rating comprises increasing a charging current of the electric vehicle charger.