How are battery storage and electric hybrid vehicles related? Does battery storage prove to be truly efficient in the long run in terms of performance and energy? Batteries have been modeled and developed for over a century in order to produce vehicles that will be able to deliver and suit peoples needs. Here is an overview on the developments and innovations.
About Batteries
A rechargeable battery or storage battery is composed of two or more secondary cells. Through electrical energy, the batteries can be fully charged again. The cells are electrochemical with a reversible electrochemical reaction that releases energy. Rechargeable electrochemical cells are an accumulator type using various chemicals and coming in various designs. The primary benefit of rechargeable batteries is economical since people can use and reuse energy.
At present, all batteries have lower energy density compared to liquid fuels. Liquid fuels are four times more expensive in terms of energy compared to electricity. An average vehicle able to travel around 125 miles daily can have energy stored in a battery pack more affordable than earlier types.
Affordable batteries are now ideal for medium-range electric vehicles. Another major benefit of batteries is its good environmental effect since construction, use and recycling methods are much better compared to gasoline. Charging and using batteries causes emission of natural elements like oxygen, hydrogen and sulfur.
Fuel cells are convenient but are very sensitive to contamination. These also require external reactants like hydrogen and have lower power density and energy compared to petroleum fuel. At present, pure electric hybrid vehicles are still limited in terms of application. Developments in lithium-based batteries are paving the way to full-sized electric vehicles able to travel as far as conventional vehicles. A single charge may be able to go as far as a single tank of gasoline allows. Lithium batteries are also cheaper to manufacture and can last longer than conventional vehicles. Recharging has been improved as well from hours to minutes.
Storing Energy
An RESS or rechargeable energy storage system stores energy in order to provide electric energy. It is also rechargeable comprised of electric batteries or ultra capacitors. Stored chemical energy in rechargeable battery packs or systems are used by electric vehicles instead of conventional internal combustion engines or ICEs.
Hybrid electric vehicles can be externally charged in order to displace ICE power as well as gasoline fuel. External charging is done by plug-in hybrid electric vehicles or PHEVs. The energy is then stored in the battery pack or system to be later on used with limited range and power.
There are various mechanisms incorporated in hybrid electric vehicles in order to store energy in batteries. One common example is regenerative braking wherein the electric engine automatically stores and saves energy when the vehicle is idling, coasting or slowing down.
The engine can conveniently switch to and from two engines depending on power required by the driver. Using one fuel source will spur the other engine to store energy in the batteries. There are also hybrid electric vehicles that automatically shut down when at a full stop which further improves battery storage. As a result, vehicles will be able to travel for longer periods of time, cover longer distances as well as save more fuel.
Battery Storage Processes
The electric engine in HEVs or hybrid electric vehicles should normally recharge and store energy when gasoline is currently being used as fuel. There are many more recharging methods for battery storage like using off-peak energy from excess on-peak electric power. Through electronic control, the electric motor can be decoupled from the battery. Ultra capacitors can then supply small power demands and regenerative braking energy.
New cell types have also been developed with improvements in cell management able to fix regenerative braking and small power demands. Cell configuration and maintenance are done during cell management. New technology now allows configuration and maintenance of one cell at a time even when all others are being used.
Pure BEVs or battery electric vehicles required charging stations with recent developments that caused charging periods to last only for minutes at a time. Charging power can be provided through electric coupling in two approaches. One is conductive coupling which has direct electrical connection to the batteries while the second is inductive charging which uses a paddle. The paddle is inserted into a car slot completing a magnetic circuit that gives power to the battery pack.
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