After just 5 days from its release, Chreos has gained international attention for its looks and style, but understandably, it has been at the centre of debates regarding its performance figures. During the past days numerous blogs and discussion forums have engaged in trying to understand and at times dismiss our claim of the 1000km range and sub 10 minute charging time for the batteries.
It is still premature to disclose our technologies and advancements, which are fruit of years of research and development. However, we want to share with you our vision of the feasibility of electric vehicles in a world where the perception of an electric car is of a vehicle that takes hours and hours to charge.
All electric cars on the market are designed to charge from a domestic power outlet or in some instances, a slightly higher-powered outlet in order to attain a faster charging time. Our Hypercharge technology aims to solve that issue. We will not enter into the merits of the batteries that Chreos has, nor how they manage to charge in under 10 minutes, but rather, we look at the reality of other electric vehicles.
A small electric vehicle usually has a 24 - 30KWh battery pack, charged by a 3KW inverter, which will take 8 to 10 hours to charge it off the domestic power outlets. At 3KW at 240V, the current is of 12A circa, a current that doesn't require any special wiring or equipment. However, should there be a reduction in the charging time of a 30KWh battery pack from 10 hours to 10 minutes, a 180KW inverter would be required to charge the same battery pack, an inverter which at 240V will require a current input of 750A - thus, extremely thick copper wires.
Hypercharge has two types of connectors. The standard connector allows the car to be hooked to standard mains, and charge over a longer period of time. However, when the car is on the move, and it has to charge in a few minutes, Hypercharge attaches to a medium tension power outlet (we are in the process of designing this connector with all the necessary safety features). Charging in the KV range, means that smaller currents are used, less heat is generated in the conduction of electrify and thinner wires and connectors can be used. A new breed of inverters than will convert the high tension voltage to the suitable voltage required to charge the battery packs.
Thus, the Hypercharge circuitry will be able to tackle an array of voltages and each time optimise the charging time of the battery packs. This is the innovation that we are proposing to the world - to introduce the concept of having high voltage points in service stations to create grids of charging stations for future rapid charging electric vehicles.
On a final note, probably many have noticed the front air vents in Chreos. These vents open up when the car is fast charging so that a controlled cooling system will maintain the batteries at an ideal temperature, avoiding overheating with subsequent damage of the battery packs. During driving the vents are closed, as the air require to cool the drive train has other inlets and outlets that are well disguised in the design.