Schneider Electric Usa, Inc.

Konstantin Alexander Filippenko

Kevin M Jefferies

Benjamin W Edwards

Matthew L White

Richard Karl Weiler

Alan E Freeman

A method, apparatus and computer program product resolve the problem of unbalanced loads in an EVSE cluster of multiple EVSE charging stations. A signal is provided to the EVSEs identifying which phase of the three-phase power source has the highest current. When one of the EVSEs in the cluster determines whether it is connected to an EV's on board charging device, determines whether it is already charging the connected EV, and determines whether the EVSE is using the phase that has the highest current, then the EVSE may transmit a cluster load balancing control signal as a control pilot signal to the EV's onboard charging device to adjust the charging rate of the current that the EV is consuming from the EVSE.

AC EVSE cluster load balancing system

A cable reel assembly in an electric vehicle supply equipment (EVSE) having a reel around which a cable is coiled. A shaft supporting the reel bears discs that rotate with the reel, and calipers coupled to the discs stop them and the reel from rotating. The power L1 and L2 conductors in the cable are electrically connected to the discs, and the calipers are electrically connected to the power source for the EVSE so that the calipers provide mechanical and electrical connection when actuated. Optionally, slip rings coupled to the shaft are connected to the control pilot and proximity signal conductors in the cable. Thus, during cable re traction, the control pilot and proximity signals are still provided to the EVSE, but the power conductors are decoupled from the power source. Only when the calipers are actuated to brake the discs is current flow permitted.

Electric vehicle charging station locking cable reel

A circuit measures temperature in a charging handleof an electric vehicle charging station (EVSE). A temperature sensor is connected between a control pilot lineand ground line G in the charging handle of the EVSE. The control pilot line transmits a square wave signal CP having positive and negative portions, to an electric vehicle, according to the SAE J1772 standard. A temperature monitorin the EVSE, coupled to a pilot signal measurement circuitin the EVSE, measures the negative portions of the square wave signal resulting from the temperature sensor conducting current in response to changes in temperature in the handle. Temperature measurement of the charging handle is achieved without significant added cost or complexity, by reusing existing components in the EVSE, with little or no modification required to EVSE electronics, and minimal modification of the handle.

EVSE with cordset handle temperature measurement

A temperature sensorautomatically shuts down charging operations in response to a temperature increase in a charging handleof an electric vehicle charging station. The temperature sensor is connected between a ground conductor and a high voltage conductor Lin the charging handle. The charging handle includes a return conductor L/N. The temperature sensor includes a thermistor R-NTC that changes its resistance in response to an increase in temperature in the charging handle. A portion of current in the high voltage conductor is diverted to the ground conductor, instead of the return conductor, in response to the thermistor sensing a temperature increase, thereby causing a ground fault detectorto trip in the charging station.

EVSE handle with automatic thermal shut down by NTC to ground

An add-on adapterenables a single charging portof an electric vehicle charging stationto simultaneously charge two electric vehicles. An adapter controllerdetermines the available charging rate offered by the charging station. Electric vehicle charging handlesA,B are determined to be connected to the electric vehicles. A charge sharing control circuitin the adapter controller, determines modified available charging rates to be offered for simultaneously charging the electric vehicles. The modified available charging rates are based on the connection states of the electric vehicles and the available charging rate offered by the charging station. The adapter controller controls two contactorsA,B to switchably connect a charging station power socket to the electric vehicle charging handles, to provide shared power at the determined modified available charging rate to the electric vehicles, for simultaneous charging.

EVSE doubler add-on unit

Systems, methods, devices, and computer-readable media detect a status of a cable, and in particular, a cable of electric supply equipment. An example of electric supply equipment is electric vehicle supply equipment, which may be used for charging an electric vehicle. The electric vehicle supply equipmentmay include a cablefor delivering electric power from a power source to the electric vehicle. Further, the electric vehicle supply equipmentmay include a cable detection subcircuitfor detecting a status of its cable. Specifically, the cable detection subcircuitmay detect whether the cablehas been removed. Further, the electric vehicle supply equipmentmay take various actions based on results provided by the cable detection subcircuit

Electric vehicle supply equipment cable detection

Systems, methods, apparatuses, and computer-readable media provide electric supply equipmentconfigured to perform diagnostics. The electric supply equipmentmay include a receptaclefor forming a closed circuit loop. The electric supply equipmentincludes a connectorfor charging devices, such as electric vehicles. The connectormay include one or more conductors, some of which may be wrapped with insulation. When the connectoris not used for charging, the connectormay be connected to a receptacleof the electric supply equipment. Thus, the electric supply equipment, via the receptacle, may form a closed loop circuit with the conductors. Further, the electric supply equipmentmay include a diagnostic unitfor performing diagnostic tests on the conductors. In particular, the diagnostic unitmay access ends of the conductors via the receptacle

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Raleigh, NC, United States of America

Konstantin Alexander Filippenko