The technology of electric vehicles. The battery

The technology of electric vehicles. The battery

Following with the series of articles on electric vehicles the technicians of Renobat will speak to us today of the most determinant component of these vehicles: the battery.

In the battery there is a reversible chemical reaction in which an electric current is produced that is capable of supplying an electric motor. In the opposite direction when an electric current is applied to the battery, the ions and electrons return to their original situation.

There are three types of batteries, which are used in electric vehicles, lead-acid batteries, nickel-Metal batteries and lithium-Ion batteries.

Lead-acid batteries are the low cost option, although they can only store in the order of about 40 Wh/kg, a very poor energy density compared to other storage systems.

Nickel-Metal batteries have been the next step in electric vehicles, have more than 10 years of experience, especially in their incorporation in hybrid vehicles. Its specific power is higher than the above (60 Wh/Kg), has a long life cycle and does not present environmental problems as serious as lead batteries.

Lithium-Ion batteries, mainly those of LiFePO4 used by Renobat ®, are those that will undergo further development for application in the automotive or naval industry. One of the most important features along with the lifespan and number of load and unload cycles is the power density that can reach values higher than 120 Wh/Kg. The development of this type of batteries has given a virtually unstoppable impulse to electric vehicles.

The battery of the electric vehicles manufactured by Renobat ® is of the type LiFePO4 (lithium + iron + manganese + phosphate) that has a much higher energy density than that of the lithium batteries of the previous generation.

The Li-Ion technology also guarantees the absence of battery memory, thus allowing the battery to be recharged at any time without charging its state of charge.

However, this type of battery requires precise management of the loading or unloading processes that are controlled by the BMS which incorporates renobat in all its batteries.

In the same way, Renobat always incorporates a forced cooling system that allows to maintain the temperature of the battery in levels compatible with a good operation.

Finally, the recharge is blocked in the case of temperatures below 25 º C or above 60 º C.

Remember that Renobat ®, together with its partners, is a company specializing in the transformation of thermal or hybrid vehicles into electric. If you want to transform your fleet of thermal vehicles, or part of them, in electric get in touch with our technical department.