Herein, an innovative wireless charging system (WCS) is proposed for EVs that achieves high efficiency through a negative-polarity partial power conversion (NP-PPC) approach. While conventional partial power conversion methods are constrained by series-connected relationships, our proposed NP-PPC approach inverts the voltage polarity of the DC.
Eliminates the need for the EV's Bidirectional onboard charger. The charging station's bidirectional inverter manages the power conversion, enabling higher power levels and faster energy transfer compared to AC systems. Requires dedicated DC charging infrastructure, such as Bidirectional DC chargers.
Energy exchange between the EV and charging station occurs directly in DC form. The DC charging station performs the necessary conversion between AC (grid power) and DC (battery power) for both charging and discharging. Key Features: Eliminates the need for the EV's Bidirectional onboard charger.
The charging station detects grid failure and initiates V2H or V2B. It opens the AC grid switches to isolate the home from the grid, preventing energy backfeeding. The BPT system discharges energy to provide a stable voltage and frequency, powering home appliances. The system ensures energy delivery stays within the EV's power limits.
As 3rd party EV networks become comprehensive, charging providers will have a self interest in providing good service and ensuring their networks are reliable with little downtime. Downtime at a popular charging spot means loss of revenue. And poor service means that people will take their car to another competing 3rd party provider.
Is 3rd party EV infrastructure a viable business model?
3rd party EV infrastructure seems to have been built mostly on a supply and demand basis (with the exception of some publicly funded projects). Organizations like Chargepoint, EVgo and Greenlots are all trying to make viable business models on providing EV charging solutions to customers.
Is DC V2V charging possible?
DC V2V charging is theoretically possible but not practical due to several technical and hardware limitations: Requirement for a Regulated DC Source: Charging an EV with DC power requires a precisely regulated DC source. However, most EVs are not designed to generate or manage a stable DC output for external use.