Cambridge-based battery technology startup, Nyobolt, has made significant strides in fast charging with its latest electric vehicle (EV) prototype. The company claims that their EV prototype can charge from 10% to 80% in just four minutes and 37 seconds using a 350-kilowatt DC fast charger, similar to the time it takes to fill up a conventional internal combustion car's gas tank.

The key to Nyobolt's impressive charging capabilities lies in its proprietary battery cells, which feature carbon and metal oxide anode materials, a low-impedance design, and integrated power electronics. These advancements allow for limited heat generation during fast charging, with the battery modules' temperature being kept in check by cold plates running a water/glycol mix cooled by an AC compressor and condenser.

Nyobolt's 24.5-amp-hour cells have undergone over 4,000 full Depth of Discharge (DoD) cycles, equivalent to over 600,000 miles in the case of their lightweight two-door EV prototype. Remarkably, the cells have retained over 80% of their capacity even after these fast-charging cycles, showcasing the durability and longevity of Nyobolt's battery technology.

However, it is worth noting that the current prototype carries limitations, such as its weight. Weighing just 2,755 pounds, it is challenging to envision how a battery-powered mid-size crossover could match this lightweight figure, especially with the inclusion of a larger battery pack, passenger capacity, and safety features present in other EVs like the Tesla Model Y.

Speaking of battery size, Nyobolt's EV prototype currently utilizes a 35 kWh pack, offering a range of up to 155 miles on a full charge. In comparison, the Tesla Model Y, for instance, boasts a larger lithium-ion pack ranging from 60 to 81 kWh, providing an EPA-rated range of up to 320 miles. Nyobolt envisions doubling their battery capacity to 70 kWh, allowing for faster charging times while maintaining thermal management and high current draw capabilities.

Nyobolt revealed that several car companies have expressed interest in their battery technology. The startup anticipates low-volume production to commence as early as next year, with plans to ramp up production by 2025. As is the case with any EV startup, these claims should be taken with caution until a commercial product is on the road. However, Nyobolt's progress suggests promising advancements towards quicker charging times for EVs.

In conclusion, Nyobolt's EV prototype has showcased its ability to charge to 80% in under five minutes, thanks to their breakthrough battery technology. With continued development and potential partnerships with car manufacturers, Nyobolt aims to revolutionize the EV market by offering faster charging times and greater range, bringing us one step closer to a future dominated by electric vehicles.