Why General Motors could integrate two charging ports into its electric cars

General Motors has just published a patent detailing a smart solution, which allows you to recharge an electric car faster thanks to two charging ports.

Developing an electric car is a real challenge for manufacturers and especially for their engineers. In fact, this type of vehicle has many limitations, particularly related to energy storage and recharging. While the number of connected vehicles is expected to explode over the next few years, it is imperative to find them solutions to reduce time spent in the terminal.

Most of the time, this involves increasing the load power that the car can withstand, particularly by equipping it with an 800 volt system. This allows benefit from higher charging power throughout recharging compared to the more traditional 400 volt system. This is especially the case with the Porsche Taycan, which can then harness up to 270 kW of power on compatible terminals, allowing it to regain up to 100 kilometers of range (WLTP) in just 5 short minutes. go from 5 to 80% in less than 23 minutes.

An innovation that now tends to become more democratic as the 800 volt system is found in the Kia EV6 and Hyundai Ioniq 5. The problem with the 800 volt system is that the charging time is a bit longer on a 400 volt terminal.

Two charging ports

But on the part of General Motors, we found an alternative solution, which could be found in the future production cars of the American group. In fact, our American colleagues at Green Car Report have managed to get their hands on a patent recently filed by the company with the USPTO (United States Patent and Trademark Office), the organization in charge of register these documents.

At least one innovative system is detailed, which consists of installing two charging ports in the electric cars, one next to the other, for, in particular,speed up the loading of double layer packages. This device made it possible to make the most of the two-level battery system (more than 200 kWh), specially equipped in the GMC Hummer EV.

800 + 400 volts for super fast charging

The advantage of the two-level pack is that these two layers can work in series or in parallel, allowing in the second case to take advantage of a recharge at 800 volts. But the patent and its system consisting of two CCS ports together, describe the possibility of passing the layers in series, in order to load each half of the package at 400 volts simultaneously, using two different chargers. Which greatly speeds up the load on conventional 400 volt terminals.

The patent even indicates the possibility of acceptance charging at 800 volts on one port and 400 volts on the second connector. Contrary to what we have read in other media, the patent does not indicate the possibility of using both ports at 800 volts at the same time. In fact, it specifies the possibility for the car to choose, on the fly, the port to be set to 800 volts so that the load is as fast and transparent as possible for the driver.

Load two cars with a single terminal

Also, thanks to the feature V2L, may be delivered to another device, 400 volts on one of the two ports while charging the car with 400 or 800 volts on the other. We can then imagine a situation in which we have a single charging station recharging two vehicles at once, in a cascade.

But be careful, because if General Motors has filed this patent, there is no guarantee that it will actually be used for production vehicles. In addition, the firm does not provide accurate information on the impact on loading time.

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