At present, the main problems that plague the popularity and development of electric vehicles are two problems, one is the charging time, compared to the fuel vehicle 3 minutes to replenish the energy, the electric vehicle is currently full of time to more than 1 hour, and from 20% -80% of the time is also more than 30 minutes, so unless there is a household charging pile, otherwise the convenience of use, far from being comparable to the fuel vehicle.
On the other hand, the endurance, although it seems that the current 500 km endurance is enough to meet the daily use, but to know, the endurance of electric vehicles is always to "pinch the head and tail", many electric vehicles can actually use the endurance, that is, 60%-70% or so, if you count the attenuation of high-speed driving and low temperature attenuation, 500 km of nominal endurance, can only be used about 200 km, so today's electric vehicles, endurance performance or room for improvement. Limited by the energy density, many models have actually been unable to put down larger capacity batteries.
Recently, there is an American battery supplier Our Next Energy (ONE), developed a completely new battery pack, in the same loading space as the original factory to double the available energy of the car battery pack, this battery relies on a model called "dual battery", this battery uses a cathode that does not contain cobalt and nickel, the second set of high-energy battery packs can charge the first group, which can double the vehicle's driving range, equipped with this battery test car Tesla Model S, Its battery pack has a capacity of 203.7 kWh and an energy density of 416 WHr/L. In tests in December, the test car traveled 752.2 miles (about 1210 km/ h) in the face of winter temperatures, with an average speed of 55 mph (about 88 km/h).
At the time of the shelves test, the car traveled 882 miles, or about 1419 kilometers, at a speed of about 88 kilometers per hour. It is conceivable that the nominal endurance of this car is definitely higher, maybe even more than 1500 kilometers.
The biggest significance of this battery is to improve the energy density, before the large battery, must take into account the model, many car models often can not put down the oversized battery, and the US battery supplier Our Next Energy this time developed battery products, there is hope that more models, can not affect the occupation of space, the use of larger capacity batteries.