Momentum Dynamics Corporation

Inductev, Inc.

Other

Andrew William Daga

Francis J McMahon

Bruce Richard Long

Matthew L Ward

Christopher E Williams

Edward J Gander

Henry W Sawyer

Joren Kristofer Wendschuh

Jedtsada Laucharoen

Daniel S Hackman

John M Wolgemuth

Benjamin H Cohen

Peter C Schrafel

Moses M Keener

Francis J Mcmahon

A thin resonant induction wireless power transmission transfer coil assembly designed for low loss and ease of manufacturing includes one or more printed circuit boards having a first conductor pattern wound in a spiral on a first side and a second conductor pattern wound in a spiral on a second side thereof, where the second conductor pattern is aligned with the first conductor pattern whereby the second conductor pattern reinforces magnetic flux generated by the first conductor pattern. The first and second conductor patterns are placed relative to one another so as to provide flux transmission in a same direction. One or more of such printed circuit boards form a wireless power transmission coil assembly with a conductive winding layer, a ferrite flux diversion layer, conformal spacing layers, an eddy current shield layer and an assembly enclosure.

Wireless power transfer thin profile coil assembly

Wireless charging pad

A contactless battery system includes a sealable case, a battery unit disposed within the sealable case, and at least one wireless power transmission coupler connected to the battery unit and disposed within the sealable case. The battery unit includes an arrangement of serially connected battery cells in a fixed number of banks of battery cells to deliver a set voltage and current. The wireless power transmission coupler is disposed with respect to at least one face of the sealable case to enable magnetic inductive signaling for charging, discharging, and communication with the battery unit. A battery management controller communicates bidirectionally with the contactless battery systems and with electrically powered equipment to control charging. A distribution system manages distribution of the contactless battery systems to a plurality of depots adapted to store, charge, or exchange depleted contactless battery systems under control of at least one management unit.

Contactless swappable battery system

An air-cooled subsurface vault houses a wireless power transfer charger for charging electric vehicles. The vault includes a cavity that receives the wireless power transfer charger and includes an air space around the wireless power transfer charger. At least two grates are positioned on respective sides of the wireless power transfer charger to enable bi-directional air-flow between the surface and the air space around the wireless power transfer charger. A temperature control element is further provided to regulate a temperature within the cavity and the at least two grates. The temperature control element may further include a heat exchanger positioned within the air space of the vault. Each grate is further adapted to act as an inlet or an outlet for the heat exchanger. A controller may be used to control operation of the heat exchanger to control venting duration and a direction of air flow in the cavity.

Air cooled subsurface vault for wireless power transfer systems

A contactless battery system includes a sealable dustproof and waterproof case that houses a battery unit and at least one wireless power transmission coupler connected to the battery unit. The at least one wireless power transmission coupler is disposed with respect to at least one face of the sealable case to enable magnetic inductive signaling for charging, discharging, and communication with the battery. Without physical contacts, the battery is inherently safe since voltage and current are not available to the touch. The lack of physical contacts also means that contact wear is eliminated and the battery modules have the benefit of inherent galvanic isolation. Since the battery system is sealed, internal intrusion detection systems may be used to detect improper attempts at battery changes or attacks on the electronics containing the usage and charging records in an attempt to increase the battery unit's value on the secondary battery market.

A full duplex, low latency, near field data link controls a resonant induction, wireless power transfer system for recharging batteries. In an electric vehicle embodiment, an assembly is aligned with respect to a ground assembly to receive a charging signal. The vehicle assembly includes one or more charging coils and a first full duplex inductively coupled data communication system that communicates with a ground assembly including one or more charging coils and a second full duplex inductively coupled data communications system. The charging coils of the ground assembly and the vehicle assembly are selectively enabled based on geometric positioning of the vehicle assembly relative to the ground assembly for charging. As appropriate, the transmit/receive system of the ground assembly and/or the vehicle assembly are adjusted to be of the same type to enable communication of charging management and control data between the ground assembly and the vehicle assembly during charging.

Near field, full duplex data link for resonant induction wireless charging

A vehicle alignment system is adapted to align a vehicle with a wireless power induction coil for wireless charging through use of magnetic resonant induction. The system includes a transmission line disposed in the parking slot so as to guide the vehicle to the wireless power induction coil for charging. The transmission line leaks a signal having an operating frequency that is detected to align the vehicle left-right in the parking slot when the vehicle is aligned for charging by the wireless power induction coil. At least two vehicle mounted antennas mounted on opposite sides of transmission line when the vehicle is aligned in the parking slot detect the operating frequency from the transmission line, and signal processing circuitry detects a relative signal phase between signals detected by the antennas that is representative of alignment of the vehicle with respect to the wireless power induction coil and the parking slot.

Method and apparatus for the alignment of vehicles prior to wireless charging

A full duplex, low latency, near field data link controls a resonant induction, wireless power transfer system for recharging batteries. In an electric vehicle embodiment, an assembly is aligned with respect to a ground assembly to receive a charging signal. The vehicle assembly includes one or more charging coils and a first full duplex inductively coupled data communication system that communicates with a ground assembly including one or more charging coils and a second fill duplex inductively coupled data communications system. The charging coils of the ground assembly and the vehicle assembly are selectively enabled based on geometric positioning of the vehicle assembly relative to the ground assembly for charging. As appropriate, the transmit/receive system of the ground assembly and/or the vehicle assembly are adjusted to be of the same type to enable communication of charging management and control data between the ground assembly and the vehicle assembly during charging.

A full duplex, low latency, near field data link controls a resonant induction, wireless power transfer system for recharging electric vehicles. An assembly of a vehicle is aligned with respect to a ground assembly to receive a charging signal. The vehicle assembly includes one or more coils, each coil having a full duplex inductively coupled data communication system that communicates with a ground assembly including one or more coils, with each coil also having a full duplex inductively coupled data communications system. The coils of the ground assembly and the vehicle assembly are selectively enabled based on geometric positioning of the vehicle assembly relative to the ground assembly for charging. As appropriate, the transmit/receive system of the ground assembly and/or the vehicle assembly are adjusted to be of the same type to enable communication of charging management and control data between the ground assembly and the vehicle assembly during charging.

A vehicle alignment system is adapted to align a vehicle with a wireless power induction coil for wireless charging through use of magnetic resonant induction. The system includes a transmission line disposed in the parking slot so as to guide the vehicle to the wireless power induction coil for charging. The transmission line leaks a signal having an operating frequency that is detected to align the vehicle left-right in the parking slot when the vehicle is aligned for charging by the wireless power induction coil. At least two vehicle mounted antennas mounted on opposite sides of transmission line when the vehicle is aligned in the parking slot detect the operating frequency from the transmission line, and signal processing circuitry detects a relative signal phase between signals detected by the antennas. The relative phase differences between the detected signals from the antennas are representative of alignment of the vehicle with respect to the wireless power induction coil and the parking slot.

Method and apparatus for the alignment of a vehicle and charging coil prior to wireless charging

A method for adjusting reactance includes an adjustable reactance generator including a comparator receiving an input sinusoidal waveform and outputting a square wave that retains the frequency and phase of the applied sinusoidal waveform. The reactance adjustment is generated using a power switching circuit that receives the square wave from the comparator as a control signal and outputs a square wave that retains the frequency and phase of the applied sinusoidal voltage waveform, an adjustable power supply that adjusts the amplitude of the square wave output by the power switching circuit, and an amplitude detector that controls the output level of the adjustable power supply. The power switching circuit output, when converted to a sinusoid, provides the effect of an adjustable reactance.

Method of and apparatus for generating an adjustable reactance

A method for detecting induction coil alignment error in resonant induction wireless power apparatus includes an eddy current coil array superimposed upon the primary induction coil, a switching device for each eddy current coil, a voltage detector such as a low power rectifier connected to the secondary induction coil, an analog-to-digital converter, primary and secondary side micro-controllers, and, in a vehicle charging embodiment, a vehicle operator interface. During coil alignment, the primary side induction coil operates at low power. Eddy current flows in an eddy current coil only if the associated switching device is switched on.

Growing community of inventors

Malvern, PA, United States of America

Andrew William Daga