GM is taking a significant step towards addressing one of the most frustrating aspects of public electric vehicle charging: long wait times. By allowing multiple EVs to use the same charger at once, GM may have just figured out a way to help mitigate this issue. The company's new patent filing has revealed a innovative solution that could revolutionize the way we think about fast-charging stations.
The concept is based on connecting multiple low-power access points (LPAPs) in a daisy chain configuration to a main DC fast charger. This setup enables the main DC charger to send power to each LPAP, which can then charge an EV. The patent drawings show one DC fast charging juicing up two different EVs that are connected to LPAPs, effectively doubling the number of charging spots available.
Each LPAP is equipped with three plugs: one that connects directly to the DC charger or the previous LPAP in the series, one that charges the car, and another that connects to the next LPAP in the series. Additionally, each LPAP features controllers that communicate with both the car and the main DC charging station. These controllers can determine each EV's state of charge and battery voltage, allowing the system to prioritize how to distribute power to the multiple EVs.
The system could potentially optimize charging times by prioritizing cars with higher voltages or sending a majority of its power to a vehicle running desperately low until it reaches a certain point. This approach would ensure that power is distributed evenly among all connected vehicles, maximizing efficiency and minimizing wait times.
Currently, the fastest public DC charging stations can reach speeds of up to 400 kW. However, many new EVs are capable of receiving faster charging speeds, with some models supporting 350 kW or higher. The introduction of GM's 'daisy chain' technology could potentially enable a single 350-kW DC station to charge two electric vehicles at around 150 kW each.
This development has significant implications for the electric vehicle market, as it could reduce waiting times and make charging more convenient for customers. By increasing the number of available charging spots, GM's innovative solution may also encourage more people to adopt EVs as a viable transportation option.
From an operational perspective, this technology would require careful management and coordination between the main DC charger, LPAPs, and connected vehicles. However, with advancements in software and hardware, it is likely that such systems could be implemented efficiently and effectively.
The 'daisy chain' concept has the potential to become a standard feature in public fast-charging stations, particularly as the demand for EV charging continues to grow. As more companies invest in this technology, we can expect to see significant improvements in the overall charging experience for electric vehicle owners.
Ultimately, GM's innovative approach to charging could set a new benchmark for the industry, demonstrating the company's commitment to addressing the challenges facing public EV charging infrastructure.
This technology has the potential to significantly reduce waiting times at public charging stations, making electric vehicles more appealing to a wider audience.
