Electric vans could cost other EVs in the course of fast-charging, with dual portsMay 21, 2022
Electrical autos have the possible to grow to be cell electrical power banking institutions for our properties and worksites. But as additional scenarios turn out to be feasible, would two ports be improved than one?
That appears to be one thing GM has possibly pondered, or saved for the long run, with a current patent submitting displaying a setup that could get the most out of GM’s double-layer pack that is now being utilized in the GMC Hummer EV and in the forthcoming Chevy Silverado EV and GMC Sierra EV.
The proposed set up relies on a series of controllers and switches, in addition to the GM pack’s baked-in skill to work as two unique packs in sequence or in parallel, therefore allowing the top and bottom to temporarily be wired in collection. The latter enables 800-volt charging to get benefit of speedier 350-kw DC fast-charging hardware.
Ultium EV system – GMC Hummer EV
In the GMC Hummer EV, the 12 modules are wired in collection to make up a single battery “pack,” or layer—adding up to additional than 100 kwh—while which is related in parallel to one more nearly identical layer with the same selection of modules.
GM outlines that a single charging port could be configured to demand at 800V or 400V, while the other cost port would be linked to the other “pack” and only be 400V. It could connect them in series while charging both equally the upper and lessen packs at the exact same time making use of 800V and the first port. Or it could use equally ports to demand the upper and reduced packs at the same time at 400V, with the controller capable of selectively connecting them in parallel.
The filing notes that a third configuration could likely let the controller to isolate the two packs, when in parallel method, to demand a single at a time.
GM patent filing – twin cost ports
Even further, GM notes that its controller would enable the second CCS demand port to be made use of to power an accessory load at 400V though charging the total reconfigurable battery process at 800V.
That is a state of affairs that could be valuable if you have equipment you want to keep working with electricity from the next port when the truck charges on the initial. Or, potentially, if you have a smaller sized EV that you can basically daisy-chain to charge, at a lessen level, from that 2nd port.
Individually, GM notes an improve to its twin-port setup, with the addition of an additional switch adjacent in the circuit to the 2nd charge port that would make both equally ports 800V-compatible.
The firm says that its configuration could extend to other motor automobile kinds, plane, maritime vessels, or rail autos.
GM’s proposed structure is identical to the program applied by Porsche Taycan and Audi E-Tron GT. In these types, the appropriate-aspect port is for DC rapidly-charging, whilst the ports on possibly facet can be made use of for AC charging. Even so, it’s that way for ease in those people functionality EVs you just cannot truly use both of those ports at the same time. An illustration submitted with GM’s patent filing demonstrates the proposed ports side by side—a structure that most likely makes extra perception in a operate condition or fleet charging bay, though personalized trucks may possibly be greater served obtaining a port on both side.
2007 Chevrolet Volt Strategy
Patent filings never assure that an automaker will actually implement the technological innovation. At times the main determination is merely to shore up the risk for the foreseeable future.
On the other hand the dual-port notion isn’t completely new to GM. It dabbled with the plan on its Volt when in concept form, dropping the notion on the way to generation. While that would have been overkill, this makes a ton much more sense for all the various possible varieties of ability-sharing.
The Ford F-150 Lightning by now flexes the functionality to output a load for house backup energy or EV charging by way of its J1772/Combo port, but it has just a person cost port.
GM wi-fi battery administration system for EVs
For GM, some of the technologies it’s teased as part of its Ultium propulsion toolkit could act as supporting players. Its wireless battery management system makes it possible for vehicles to easily blend and match modules at distinct states of degradation—even containing unique cell types—all inside of the same pack, producing it uncomplicated to potentially exchange just some of those people cells. GM has previously built its modules and packs forward compatible—beyond the recent huge-structure lithium-ion pouch cells co-formulated with LG—to a time mid-decade or later when lithium-metallic cells could possibly allow for the power density that would permit a 600-mile assortment.