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History of the battery
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Old 20-01-2017
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History of the battery


Batteries provided the main source of electricity before the development of electric generators and electrical grids around the end of the 19th century. Successive improvements in battery technology facilitated major electrical advances, from early scientific studies to the rise of telegraphs and telephones, eventually leading to portable computers, mobile phones, electric cars, and many other electrical devices.

Scientists and engineers developed several commercially important types of battery. "Wet cells" were open containers that held liquid electrolyte and metallic electrodes. When the electrodes were completely consumed, the wet cell was renewed by replacing the electrodes and electrolyte. Open containers are unsuitable for mobile or portable use. Early electric cars used semi-sealed wet cells.

"Primary" batteries could produce current as soon as assembled, but once the active elements were consumed, they could not be electrically recharged. The development of the lead-acid battery and subsequent "secondary" or "rechargeable" types allowed energy to be restored to the cell, extending the life of permanently assembled cells.


Invention of the battery

In 1780, Luigi Galvani was dissecting a frog affixed to a brass hook. When he touched its leg with his iron scalpel, the leg twitched. Galvani believed the energy that drove this contraction came from the leg itself, and called it "animal electricity".

However, Alessandro Volta, a friend and fellow scientist, disagreed, believing this phenomenon was caused by two different metals joined together by a moist intermediary. He verified this hypothesis through experiment, and published the results in 1791. In 1800, Volta invented the first true battery, which came to be known as the voltaic pile. The voltaic pile consisted of pairs of copper and zinc discs piled on top of each other, separated by a layer of cloth or cardboard soaked in brine (i.e., the electrolyte). Unlike the Leyden jar, the voltaic pile produced a continuous electricity and stable current, and lost little charge over time when not in use, though his early models could not produce a voltage strong enough to produce sparks. He experimented with various metals and found that zinc and silver gave the best results.

Volta believed the current was the result of two different materials simply touching each other—an obsolete scientific theory known as contact tension—and not the result of chemical reactions. As a consequence, he regarded the corrosion of the zinc plates as an unrelated flaw that could perhaps be fixed by changing the materials somehow. However, no scientist ever succeeded in preventing this corrosion. In fact, it was observed that the corrosion was faster when a higher current was drawn. This suggested that the corrosion was actually integral to the battery's ability to produce a current. This, in part, led to the rejection of Volta's contact tension theory in favor of electrochemical theory. Volta's illustrations of his Crown of Cups and voltaic pile have extra metal disks, now known to be unnecessary, on both the top and bottom. The figure associated with this section, of the zinc-copper voltaic pile, has the modern design, an indication that "contact tension" is not the source of electromotive force for the voltaic pile.

Volta's original pile models had some technical flaws, one of them involving the electrolyte leaking and causing short-circuits due to the weight of the discs compressing the brine-soaked cloth. A Scotsman named William Cruickshank solved this problem by laying the elements in a box instead of piling them in a stack. This was known as the trough battery. Volta himself invented a variant that consisted of a chain of cups filled with a salt solution, linked together by metallic arcs dipped into the liquid. This was known as the Crown of Cups. These arcs were made of two different metals (e.g., zinc and copper) soldered together. This model also proved to be more efficient than his original piles, though it did not prove as popular.


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Dil Dooba Dil Dooba...Neela Akho Mein Yeh Dil Dooba.. Neela Neela Amber Per Chand Jab Aye...Aisa Koi Saathi Ho ..Aisa Koi Premi Hoi Jaanam Dekh Lo Mit Gayeen Dooriyaan..Main Yahaan Hoon Yahaan Hoon..Yahaan Hoon..Yahaan...Kaisi Sarhadein...Kaisi Majbooriyaan..Main Yahaan Hoon Yahaan Hoon..Yahaan Hoon..Yahaan...Tum Chhupaa Na Sakogi Main Vo Raaz Hoon...Tum Bhulaa Na Sakogi Vo Andaaz Hoon...Goonjtaa Hoon Jo Dil Mein To Hairaan Ho Kyon...Main Tumhaare Hi Dil Ki To Aavaaz Hoon...Main Yahaan Hoon Yahaan Hoon..Yahaan Hoon..Yahaan... Aisa muhje tu na dehka na...seeena se laga loonga, tum ko tumse chura loonga...dil mein chupa loonga Gila Gila Dil Gila.. Mila mila mila koi mila ...Teri Ha Adaar Laga sab se judaa hai dil tuje per fida hai... Dhoom Dhoom let ya body do the talking..Dhoom Dhoom be the fire thats buring..Dhoom machaalay dhoom machaalay dhoom Tere Liye Hum Hai Jiye..Hota ke siya...Dil mein Magar chalte reha chaahat ke Diya... Zara zara bahekta hai, mahekta hai,Aaj to mera tan badan, main pyaasi hoon,Mujhe bhar le apni baahon mein Dheera dheera se mera zindagi mein ana...tumsi pyar huma hai kitna jaana jaana Pyar ke isa khel mein..do dil aur mehl mein, tera peecha na chodunga soniya Mera mehboob sanam, tera ashiq hogaya hum...milaka nazaaro se nazaar tera pyaar mein kogaya hum... Wada Raha Pyar Se Pyar Ka, Hum Na Hoga Juda, Dil Ke Dhadkhan Sunrha Hai Mera Khudda Dheera Dheera Se Mera Zindagi Mein Ana...Tumsi Pyar Huma Hai Kitna Jaana JaanaSaamne hain raastein, hum guzar jaaye...Ya kisi ke vaaste hum thaher jaaye...Ab yahan tak aa gaye hain, ab kidhar jaaye...Jaaduuuuuuu teri nazar...Kushboo tera baadan..tu har kar, ya nah kar...Kali nagin ke jaise..Zulfe teri kali kali..Sagar ko moti aur..Suraj ko tu dati hai lali..Kali nagin ke jaise..Zulfe teri kali kaliYeh din yeh mahine saal guzar jaayenge mere yaar..Magar itna rakhna khayaal..Jeena sirf mere liye, jeena sirf mere liye..Kasam se jeena sirf mere liye, jeena sirf mere liye Banno ki saheli resham ki dori..Chhup chhupke sharmaaye dekhe chori chori..Yeh maane ya na maane main to ispe mar gaya..Yeh ladki haai allah, haai haai re allah Tum paas aaye, yun muskuraaye,Tumne na jaane kya sapne dikhaaye,Tum paas aaye, yun muskuraaye,Tumne na jaane kya sapne dikhaaye,Ab to mera dil jaage na sota hai,Kya karoon haaye, kuch kuch hota hai
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