Different Opinions about Lead Acid Battery used for Electric Vehicles

Lead acid battery adopts a reversible chemical reaction to store energy. And it uses a combination of lead plates or grids and an electrolyte consisting of a diluted sulphuric acid to convert electrical energy into potential chemical energy and back again. The lead sulfate crystals is a very easy matter, when the battery electrolytic solution of sulfuric acid in the concentration of lead in the static idle time is too high or too long, they will “hold a” group, to form small crystals, and attract around these small crystals lead sulfate, as the inertia of the formation of large snowball as the crystallization of lead sulfate crystals after the charge not only can not be reduced to lead oxide, but also precipitated the board attached to the electrode, resulting in a decline in working area of electrodes, this phenomenon is called sulfide, which is often said that the aging. At this time the battery capacity will gradually decrease until unusable.

People aren’t sure about which battery to choose for their conversion of a conventional automobile into a pure electric vehicle (EV). They can either use a deep cycle lead-acid battery or a lithium battery. There are advantages and disadvantages for both these batteries. Some people are of the opinion that only a lithium battery can make an electric car work efficiently.

1. Lead batteries are cheaper compared to lithium batteries. An electric car which runs on 120V will require 20 batteries of 6V each. Each battery will cost something between $100-150. So the total expenditure on batteries will be just $2,000-3,000.

2. Lead batteries are easily available because they can be bought from any local battery dealer. It means that you don’t have to spend extra money on its transportation.

3. Lead batteries are powerful and when you use them on your electric car, you can speed along the freeway, and even join a race. There is nothing to prove that lead batteries are less powerful than lithium batteries. The only advantage that a lithium battery has over a lead battery is its being lightweight.

4. Lead batteries are safe to use. Whatever use you put lead batteries into, they are safer than any other batteries. Of course there are instances when the lead batteries leaked sulfuric acid when there was a car crash or produced flammable gases while they were being charged. These are very rare incidents and compared to other batteries, lead batteries are safe.

Lithium batteries are more dangerous than lead batteries. They can burst into flames if there is a short circuit or if they are over charged. So lithium batteries need special care. Now you can decide for yourself which battery is the most suitable one for an electric car.

From the above analysis, we can get one result that lead acid battery is better used in electric vehicles than lithium batteries. Besides, Seth Leitman, the author of Build Your Own Electric Vehicle book, on the other hand, is of the opinion that a lead acid battery is perfectly good for an electric car.

Par leochbattery le mercredi 10 août 2011

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