Abstract: An electric vehicle supply equipment (EVSE) includes a blind mate liquid quick disconnect coupler that includes a male coupling and a female coupling. The male coupling includes a pressure relief poppet valve that is positioned within the main body of the coupling. The pressure relief poppet valve controls fluid through the male coupling. The pressure relief poppet valve includes an overpressure poppet, a conical spring positioned about the overpressure poppet, and a carrier poppet that includes four prongs. The female coupling includes an opening to accept a main body of the male coupling and an end for coupling with a second fitting base of the female coupling. When the male coupling is mated with the female coupling, the pressure relief poppet valve and the tube plunger are displaced such that fluid flows between the male coupling and the female coupling.

Abstract: An attached cable circuitry assembly of an electric vehicle supply equipment (EVSE) that includes a charging protocol controller. The charging protocol controller includes a first connector to terminate one or more signal wires of a charging cable. The charging protocol controller further includes a second connector to connect via a cable to a third connector of the EVSE, the second connector to terminate supply voltage and communication from the EVSE received over the cable that connects the second connector to the third connector. The charging protocol controller further includes one or more charging communication circuits. The charging protocol controller further includes a processor to perform: signal handshake and control, and communication between the EVSE and the charging protocol controller.

Abstract: A cable tether for managing an electric vehicle charging cable is described. The cable tether comprises a housing that houses a spring clamp and a compression pad. The housing including an opening for the electric vehicle charging cable to pass through. The spring clamp includes two openings that allow a shaft member attached to an arm of the electric vehicle charging station to pass through, where a first segment of the spring clamp includes a first opening of the two openings and a portion that extends into the first opening, and where the portion that extends into the first opening slots into a cutout portion of the shaft member as the shaft member is passed through the two openings to latch the spring clamp onto the shaft member. The compression pad that is attached to the housing of the cable tether for gripping the electric vehicle charging cable.

Abstract: A charging connector adapter is nested within a holster of an electric vehicle supply equipment (EVSE). If the adapter is to be used, the EVSE automatically locks the charging connector to the charging connector adapter and unlocks the charging connector adapter from the holster of the EVSE thereby allowing the charging cable with the charging connector adapter to be removed from the holster and used for connecting the charging connector adapter to an inlet of an electric vehicle. When the charging connector adapter is inserted back into the holster, the EVSE locks the charging connector to the holster and unlocks the charging connector from the charging connector adapter.

Abstract: An open-loop fluxgate-type current sensor is described. The current sensor includes a single winding around a core that combines drive and sense that is used as both an excitation source and a feedback element to measure current through a primary winding. The current sensor further includes an H-bridge driver to impress voltage to the single winding to cause current to saturate the core, the voltage being impressed with opposing polarities repeatedly causing the core to saturate at opposing polarities. The current sensor further includes an analog transconductance integrator that continuously integrates the current to infer magnetizing force being driven into the core at the opposing polarities. The current sensor further includes a microcontroller unit (MCU) that calculates residual current based on the inferred magnetizing force being driven into the core at the opposing polarities and cause remedial action to be taken when the calculated residual current exceeds a threshold.

Abstract: Dynamic allocation of power modules for charging electric vehicles is described herein. The charging system includes multiple dispensers that each include one or more power modules that can supply power to any one of the dispensers at a time. A dispenser includes a first power bus that is switchably connected to one or more local power modules and switchably connected to one or more power modules located remotely in another dispenser. The one or more local power modules are switchably connected to a second power bus in the other dispenser. The dispenser includes a control unit that is to cause the local power modules and the remote power modules to switchably connect and disconnect from the first power bus to dynamically allocate the power modules between the dispenser and the other dispenser.

Abstract: An integrated meter in an electric vehicle supply equipment (EVSE) is described. Input power is received at input terminal of the EVSE and carried through a conductor that passes through an opening of a current transformer coil of the meter. The input power is split into a main path and an auxiliary path. The main path is for charging an electric vehicle (EV). The auxiliary path provides power to the meter to the EVSE itself. The auxiliary path passes through the opening of the current transformation coil in a reverse direction before being passed to a power supply of the meter and to a power supply of the EVSE to remove any current not for charging the EV from current measurements. The meter calculates energy measurements that do not include current drawn by the meter and the EVSE and transmits them to a processor of the EVSE.

Abstract: Dynamic allocation of power modules for charging electric vehicles is described herein. A power cabinet includes multiple power modules that each are capable of supplying an amount of power to a dispenser. Multiple dispensers are coupled with the same power cabinet. A first power bus couples a first dispenser and switchably connects the power modules to the first dispenser; and a second power bus couples a second dispenser and switchably connects the power modules to the second dispenser. The power cabinet includes a control unit that is configured to cause the power modules to switchably connect and disconnect from the first power bus and the second power bus to dynamically allocate the power modules between the first dispenser and the second dispenser.

Abstract: Networked electric vehicle charging stations for charging electric vehicles are coupled with an electric vehicle charging station network server that performs authorization for charging session requests while the communication connection between the charging stations and the server are operating correctly. When the communication connection is not operating correctly, the networked electric vehicle charging stations enter into a local authorization mode to perform a local authorization process for incoming charging session requests.

Abstract: Automatically identifying an electric vehicle supply equipment (EVSE) is described. A receiver device receives wireless signals from EVSEs, where each wireless signal includes an identifier that is associated with the one of the EVSEs from which that wireless signal is received. The receiver device records signal strength values of the wireless signals and determines, based on the recorded signal strength values, which of the EVSEs is closest to the receiver device. The receiver device initiates a request for an action at the EVSE determined to be closest to the receiver device.

Abstract: An electric vehicle charging station that uses a liquid cooled charging cable is described. The charging station includes a charging port that is configured to connect to a liquid cooled charging cable. The liquid cooled charging cable includes a cooling loop where a return side of the cooling loop is a warm side. The charging station includes a heat exchanger that transfers heat from the warm side of the cooling loop. The charging station includes a pump to pump a cool side of the liquid through the cooling loop. The charging station includes a module that causes the following to be performed in response to a startup sequence of the electric vehicle charging station: iteratively perform operations of operating the pump at increasing speeds and measuring corresponding pressure output until the speed of the pump is at its normal capacity.

Abstract: An electric vehicle supply equipment (EVSE) includes a thermal management system that includes a dual-sided heatsink that includes a first side that faces internal ambient air of the EVSE and a second side that faces external ambient air. A first fan circulates the internal ambient air of the EVSE across the first side to reject heat from the internal ambient air into the first side. A first airflow guide guides the internal ambient air across the first side of the dual-sided heatsink. A second fan draws external ambient air that flows across the second side to reject heat from the second side out of the thermal management system. A second airflow guide guides the external ambient air across the second side. An airflow seal prevents the external ambient air and the internal ambient air from mixing.