Electric vehicles have the potential to be a mobile power bank for our homes and workplaces. But if the scenario becomes more effective, will the two ports be better than one?
This seems to be something that GM has either thought of, or saved for the future, a recent patent filing showing a setup that could benefit the most from GM’s double-layer packs already in use at GMC Hummer EV and the upcoming Chevy. . Silverrado EV and GMC Sierra EV.
The proposed setup relies on multiple controllers and switches in addition to the GM pack’s back-in capability to act as two separate packs in series or in parallel, thus allowing the top and bottom to be temporarily wired in series. The latter allows 800-volt charging to take advantage of faster 350-kw DC fast-charging hardware.
Ultimate EV Platform – GMC Hummer EV
In the GMC Hummer EV, a battery is wired in a series of 12 modules to create a “pack” or layer – adding up to 100 kwh – when it is parallel to another almost identical layer with the same number of modules.
GM outlines that one charging port can be configured to charge at 800V or 400V, the other charging port will be connected to another “pack” and will only be 400V. It can connect 800V and the first port using both top and bottom packs at the same time while connecting them in series. Or it can use both ports to charge the upper and lower packs simultaneously at 400V, the controller being able to selectively connect them in parallel.
Filing note that a third configuration could potentially allow the controller to disconnect two packs, while in parallel mode, to charge one at a time.
GM Patent Filing – Dual Charge Port
Furthermore, GM notes that its controller will allow a second CCS charge port to be used to receive an incidental load at 400V and a fully reconfigurable battery system at 800V when charging.
This is a scenario that might be useful if you have equipment that you want to run with power from the second port when the truck is charged to the first. Or, perhaps, if you have a small EV that you can basically charge a daisy-chain, at a lower rate, from that second port.
Separately, GM notes an upgrade to its dual-port setup, adding another switch connected to the circuit with a second charge port that will make both ports 800V-compatible.
The company said its configuration could be extended to other types of motor vehicles, aircraft, seaplanes or rail vehicles.
GM’s proposed layout is similar to the system used by the Porsche Tycoon and the Audi E-Tron GT. In these models, the port on the right is used for DC fast-charging, while the ports on both sides can be used for AC charging. However, this is the way to benefit in this performance EV; You can’t really use both ports at the same time. An image submitted with GM’s patent filing shows the proposed ports side by side — a layout that probably makes more sense in working conditions or in fleet charging bays.
2007 Chevrolet Volt concept
2007 Chevrolet Volt concept
Patent filing never guarantees that an automaker will actually implement the technology. Sometimes the initial motivation is simply to shore up the possibilities for the future.
However, the dual-port concept is not entirely new to GM. In the form of an idea when it doubles with the idea in its vault, the idea is thrown into the path of production. Although it would have been excessive, it would have made a lot more sense for the various possible types of power-sharing.
The Ford F-150 Lightning already flexes its J1772 / combo port with the ability to output a load for home backup power or EV charging, but it only has one charging port.
GM wireless battery management system for EV
For GM, teasing it as part of its Ultium propulsion toolkit can serve as some technology support. Its wireless battery management system allows vehicles to be easily assembled and modules to hold different decay states এমনকি even different cell types মধ্যে all within the same pack, potentially making it easier to replace only a few cells. GM has already adapted its modules and packs to the front — co-developed the current large-format lithium-ion pouch cells with LG সময়ে at a time when lithium-metal cells would allow energy concentrations up to the 600-mile range.