Transcript of The Battery
The Beginning of The Battery The Invention and Innovations of the Modern Electric Battery In 1786 at Bologna University, Luigi Galvani found that when two dissimilar metals were applied to a dead frog's legs, particularly copper and zinc, the frog's legs twitched. He believed this came from within the frog, and called it animal electricity. But his friend Alessandro Volta believed that the current came from the metals, and set out to prove this. Sources Luigi Galvani Alessandro Volta The Voltaic Pile Volta eventually figured out how to prove his point. He made the first battery out of copper plates, brine soaked cloth, and zinc plates. He alternated the metals and cloth, because the farther away the metals were from each other, the higher the voltage. The brine (water and salt solution) was used as a conductor. Alessandro Volta's voltaic pile was the world's first "wet cell battery". The unit "volt" was derived from Alessandro Volta's name John Fredrick Daniell invented the Daniell Cell. In his battery, a copper plate was placed at the bottom of a glass jar and a copper sulfate solution was poured over the plate. Then the zinc plate was placed in the jar, and a zinc sulfate solution was added. Because copper sulfate is denser than zinc sulfate, the zinc solution floated to the top of the copper solution and surrounded the zinc. The Daniell cell was commonly used to power doorbells and telephones since it had a steady current, and didn't corrode like Volta's. The Daniell Cell The Lead-Acid Battery Also known as the car battery, Gaston Plante` created the lead- acid battery in 1859. His battery consisted of two sheets of lead that were rolled into a spiral. He separated them with strips of leather and put in a solution containing about 10% sulfuric acid. Early lead-acid battery Modern lead-acid car battery The Leclanche Cell Built by Georges Lechanche in 1866, the Lechanche cell was used in telephone boothes, telegraphing, and electric bell work. It was also somewhat self-recharging, which made it a very useful and reliable battery The Dry Cell Battery Dr.Carl Gassner created the "dry cell battery", because the "wet cell battery" wasn't practical to use. The dry battery wasn't filled with a solution like the wet cell , which made it easy to use and portable. Gassner's battery was the beginning of the dry battery industry. It was used in "torches", today known as flashlights. Nickel-Cadmium Battery Waldmar Jungner invented the NiCad battery in 1899. It was useful for rigourous use, but if let unused for a while, would lose its performance. Full transcript
Also, the NiCad battery wasn't widely used because the materials used to make it were expensive. Lew Urry worked at the Eveready Battery Company, where he created the small alkaline battery.
Based off the zinc-carbon batteries, it had a longer lasting life and was crucial in the making of battery-dependent objects like cameras and cell phones Energizer's Alkaline Battery Present Day We now have rechargable and powerful, long lasting batteries. Even today, new batteries are being created; batteries that charge in seconds, air fueled batteries, and even bacteria powered batteries. Inside A Battery A battery has a cathode(+), anode(-), and electrolyte. The electrolyte allows the flow of electric charge between the cathode and anode. When the terminals are connected via circuit the electrons go to the cathode. That drive is called the voltage potential, and is expressed in volts. How fast the electrons travel between the two chemicals is called the current, or flow, and is expressed in amps.
In a rechargeable battery, when charging, the electrons go back to the anode, and the process happens again. Thanks for watching
Nikki G. http://www.odec.ca/projects/2003/madse3m/public_html/batinfo.htm http://www.batteryfacts.co.uk/ http://batteryuniversity.com/learn/article/when_was_the_battery_invented http://www.allaboutbatteries.com/history-of-batteries.html http://www.alternative-energy-news.info/ http://wiki.answers.com/Q/How_do_batteries_work Effects of Batteries Positive Negative We have an easy, portable way to use energy to power devices End up in landfills
Toxic if swallowed by young children or animals