Energy storage battery inductive charging

Summary Electric vehicle (EV) inductive charging is a technology that allows an EV to charge its energy storage system remotely without physical connections. It is an exemplary solution for EV char...

Inductive charging enables a power source to transmit energy to an electrical load across an air gap, without the use of connecting wires. (2) Such systems use AC mains to DC, then DC to high-frequency AC conversion with an air-core transformer operating in the radio frequency (RF) domain to accomplish near-field magnetic coupling.

There are three visions of implementing inductive power transfer (IPT) technology for EV charging: (i) static, which happens during long-term parking, (ii) dynamic (in-motion), which occurs during high-speed travel, and (iii) quasi-dynamic, which happens during transient stops and low-speed driving charging.

Inductive charging technology is attracting a wide range of applications, from low-power applications (such as mobile phones) to charging for electric vehicles, owing to its convenience and better user experience.

We have highlighted how positioning the phone on the inductive charging base impacts the external temperature of the phone and related charging currents, indicating desired conditions for a longer battery performance. Also shown was the effect of phone accessories such as the protective casing, which is dependent on the material type and thickness.

In contrast, for misaligned inductive charging, the power input oscillated between 8.3 and 11.0 W from 0% SoC for 15 min, followed by an increase in oscillation amplitude achieving between 4 and 11.0 W for 105 min.