Electric vehicle supply equipment (EVSE) powered apparatus
An Electric Vehicle Supply Equipment (EVSE) powered apparatus includes an input power receptacle capable of receiving the plug of an EVSE device to power the apparatus using power supplied by the EVSE device, and a user-actuatable control that may be used to transition the EVSE device from a connected but not charging state to a charging state after the plug has been inserted into the input power receptacle to cause the EVSE device to transition to the charging state and supply power through the plug. In some instances, one or more output power receptacles may be provided to enable various external electrically-powered devices to be plugged into the apparatus and powered by the EVSE device, while in other instances, the apparatus itself may be an appliance, tool, or other high power device, such that the apparatus is powered directly from the EVSE device.
1 . An apparatus configured to receive power from an Electric Vehicle Supply Equipment (EVSE) device that operates in at least disconnected, connected but not charging, and charging states and that includes a plug that is configured to supply power to an electric vehicle when the EVSE device is in the charging state, the apparatus comprising:
a housing;
an input power receptacle disposed on the housing and configured to receive the plug of the EVSE device to establish a physical connection therebetween when the EVSE device is in the disconnected state, the input power receptacle including one or more line power inputs configured to interface with one or more corresponding line power outputs of the plug of the EVSE device;
a control circuit coupled to the input power receptacle and configured to, upon establishment of the physical connection between the plug and the input power receptacle, automatically cause the EVSE device to transition from the disconnected state to the connected but not charging state; and
a user-actuatable control coupled to the control circuit, wherein the user-actuatable control is a physical momentary control;
wherein the control circuit is further configured to, in response to user actuation of the user-actuatable control when the physical connection between the plug and the input power receptacle is established and the EVSE device is in the connected but not charging state, cause the EVSE device to transition from the connected but not charging state to the charging state and thereby supply power to the one or more line power inputs of the input power receptacle through the plug.
2 . The apparatus of claim 1 , further comprising one or more power output receptacles coupled to the one or more line power inputs of the input power receptacle, each of the one or more output power receptacles configured to receive a plug from an external electrically-powered device such that when the EVSE device is in the charging state and the physical connection is established between the plug and the input. power receptacle, the power supplied to the one or more line power inputs of the input power receptacle through the plug powers the one or more output power receptacles.
3 . The apparatus of claim 2 , wherein the one or more output power receptacles includes a plurality of output power receptacles capable of simultaneously powering a plurality of external electrically-powered devices having respective plugs coupled to the plurality of output power receptacles.
4 . The apparatus of claim 3 , wherein the plurality of output power receptacles differ from one another such that each of the plurality of output power receptacles receives a different type of plug.
5 . The apparatus of claim 4 , wherein the plurality of output power receptacles includes a 15 Amp National Electrical Manufacturers Association (NEMA) compatible receptacle, a 20 Amp NEMA compatible receptacle, a 30 Amp NEMA compatible receptacle, and a 50 Amp NEMA compatible receptacle.
6 . The apparatus of claim 1 , further comprising one or more electrical loads disposed in the housing and coupled to the one or more line power inputs of the input power receptacle such that when the EVSE device is in the charging state and the physical connection is established between the plug and the input power receptacle, the power supplied to the one or more line power inputs of the input power receptacle through the plug powers the one or more electrical loads.
7 . The apparatus of claim 6 , wherein the one or more electrical loads includes an electric motor and/or a heating element.
8 . The apparatus of claim 6 , wherein the apparatus is an appliance or a tool.
9 . The apparatus of claim 8 , wherein the apparatus is a vacuum, a power tool, a heater, or an air conditioner.
10 . The apparatus of claim 1 , wherein the input power receptacle is a Society of Automotive Engineers (SAE) J1772 compatible receptacle.
11 . The apparatus of claim 1 , wherein the input power receptacle includes a control input configured to interface with a corresponding control output of the plug, wherein the control circuit causes the EVSE device to transition from the disconnected state to the connected but not charging state by reducing a voltage at the control output of the plug below a first threshold, and wherein the control circuit causes the EVSE device to transition from the connected but not charging state to the charging state by reducing the voltage at the control output of the plug below a second threshold that is lower than the first threshold.
12 . The apparatus of claim 11 , wherein the control circuit includes first and second resistors coupled to the control input of the input power receptacle, the first resistor configured to electrically couple the control output of the plug to ground through the first resistor when the physical connection between the plug and the input power receptacle is established, and the second resistor configured to electrically couple the control output of the plug to ground through the second resistor when the user-actuatable control is actuated.
13 . The apparatus of claim 1 , wherein the control circuit includes a controller and a power supply that powers the controller, and wherein the power supply is coupled to the one or more line power inputs of the input power receptacle such that the power supply and controller are unpowered until the physical connection between the plug and the input power receptacle is established and the EVSE device is transitioned from the connected but not charging state to the charging state in response to the user actuation of the user-actuatable control.
14 . The apparatus of claim 1 , wherein the user-actuatable control is a first user-actuatable control, the apparatus further comprising:
one or more line power outputs configured to power one or more electrical loads;
one or more relays, each configured to selectively couple a respective line power input of the one or more line power inputs and to a respective line power output of the one or more line power outputs in response to a respective relay control signal; and
a second user-actuatable control coupled to the control circuit;
wherein the control circuit is configured to drive the respective relay control signal of each of the one or more relays to selectively couple together the respective line power input and line power output of each of the one or more relays and thereby selectively power the one or more electrical loads.
15 . The apparatus of claim 14 , wherein the first and second user-actuatable controls are physical momentary controls disposed on the housing.
16 . The apparatus of claim 14 , wherein the control circuit is further configured to disable the one or more relays in response to detecting removal of the plug from the input power receptacle.
17 . The apparatus of claim 14 , wherein the input power receptacle includes a control input configured to interface with a corresponding control output of the plug, wherein the control circuit is further configured to determine an allowed current for supplying power over the one or more line power outputs by sensing a control signal generated by the EVSE device and received by the control input of the input power receptacle.
18 . The apparatus of claim 17 , wherein the control circuit is configured to determine the allowed current for supplying power over the one or more line power outputs by determining a duty cycle of the control signal.
19 . The apparatus of claim 17 , wherein the control circuit is further configured to sense a load current while power is supplied over the one or more line power outputs and compare the sensed load current with the determined allowed current.
20 . The apparatus of claim 19 , wherein the control circuit is configured to selectively generate an alert in response to the comparison of the sensed load current with the determined allowed current and/or selectively decouple the respective line power input and line power output of each of the one or more relays from one another to discontinue powering the one or more electrical loads.
21 . The apparatus of claim 17 , wherein the control circuit is further configured to shut down in response to a failure to determine the allowed current for supplying power over the one or more line power outputs.
22 . An apparatus configured to receive power from an Electric Vehicle Supply Equipment (EVSE) device that operates in at least disconnected, connected but not charging, and charging states and that includes a plug that is configured to supply power to an electric vehicle when the EVSE device is in the charging state, the apparatus comprising:
a housing;
one or more electrical loads disposed in the housing, the one or more electrical loads including one or more electric motors and/or one or more heating elements;
an input power receptacle disposed on the housing and configured to receive the plug of the EVSE device to establish a physical connection therebetween when the EVSE device is in the disconnected state, the input power receptacle including one or more line power inputs configured to receive power from the plug of the EVSE device;
a control circuit coupled to the input power receptacle and configured to, upon establishment of the physical connection between the plug and the input power receptacle, automatically cause the EVSE device to transition from the disconnected state to the connected but not charging state; and
a user-actuatable control coupled to the control circuit;
wherein the control circuit is further configured to, in response to user actuation of the user-actuatable control when the physical connection between the plug and the input power receptacle is established and the EVSE device is in the connected but not charging state, cause the EVSE device to transition from the connected but not charging state to the charging state and thereby supply power to the one or more line power inputs of the input power receptacle through the plug.