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24.10.2015
A battery is a device for storing chemical energy and converting that chemical energy into electricity.
The electrons are generated by chemical reactions, and there are many different chemical reactions that are used in commercially available batteries.
Automobile manufacturers have identified three types of rechargeable battery as suitable for electric car use. Lead-acid batteries were invented in 1859 and are the oldest form of rechargeable battery still in use.
Lithium-ion batteries, which came into commercial use in the early 1990s, have a very high energy density and are less likely than most batteries to lose their charge when not being used -- a property called self discharge. A battery is made up of one or more electrochemical cells, each of which consists of two half-cells or electrodes.
For example, the familiar alkaline batteries commonly used in flashlights and television remote controls generate electricity through a chemical reaction involving zinc and manganese oxide.
Those types are lead-acid batteries, nickel metal hydride (NiMH) batteries, and lithium-ion (Li-ion) batteries. They've been used in all types of cars -- including electric cars -- since the 19th century. They have a high energy density -- that is, a great deal of energy can be packed into a relatively small battery -- and don't contain any toxic metals, so they're easy to recycle. Because of their light weight and low maintenance requirements, lithium-ion batteries are widely used in electronic devices such as laptop computers.


One half-cell, called the negative electrode, has an overabundance of the tiny, negatively charged subatomic particles called electrons. Lead-acid batteries are a kind of wet cell battery and usually contain a mild solution of sulfuric acid in an open container. Some experts believe that lithium-ion batteries are about as close as science has yet come to developing a perfect rechargeable battery, and this type of battery is the best candidate for powering the electric cars of the near future. The name comes from the combination of lead electrodes and acid used to generate electricity in these batteries.
A variation on lithium-ion batteries, called lithium-ion polymer batteries, may also prove valuable to the future of EVs. When the two halves are connected by a wire or an electrical cable, electrons will flow from the negative electrode to the positive electrode. Automobile batteries, on the other hand, need to be rechargeable, so they don't require constant replacement.
The major advantage of lead-acid batteries is that, after having been used for so many years, they are well understood and cheap to produce. These batteries may eventually cost less to build than lithium-ion batteries; however, at the present time, lithium-ion polymer batteries are prohibitively expensive.
In a rechargeable battery, electrical energy is used to reverse the negative and positive halves of the electrochemical cells, restarting the electron flow. However, they do produce dangerous gases while being used and if the battery is overcharged there's a risk of explosion.


The energy of these moving electrons can be harnessed to do work -- running a motor, for instance. As electrons pass to the positive side, the flow gradually slows down and the voltage of the electricity produced by the battery drops.
Eventually, when there are as many electrons on the positive side as on the negative side, the battery is considered 'dead' and is no longer capable of producing an electric flow. Especially if access to the starter is limited.If everything fails, you may have to just replace the battery.
If you cannot observe the light intensity have someone else turn the key all the way over to start.If your battery is weak or dead your head lights will dim significantly. There always could be other less common things like a bad ignition switch for example.Hopefully you got your answer here. In order to post comments, please make sure JavaScript and Cookies are enabled, and reload the page.



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