Difference between revisions of "Battery (electrical)"
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These are some common sizes used for flashlights and electronic devices. They are described by the chemistry used in the battery. Single-use batteries are usually described as ''alkaline'' while rechargeable batteries may be ''Nickel-Cadmium'' (NiCad), ''Nickel Metal Hydride'' (NiMH), or Lithium Ion (Li-ion). | These are some common sizes used for flashlights and electronic devices. They are described by the chemistry used in the battery. Single-use batteries are usually described as ''alkaline'' while rechargeable batteries may be ''Nickel-Cadmium'' (NiCad), ''Nickel Metal Hydride'' (NiMH), or Lithium Ion (Li-ion). | ||
| − | <ref>http://www.energy.ca.gov/glossary/glossary-b.html#b</ref> <ref>http://www.powerstream.com/Size.htm</ref> | + | <ref>http://www.energy.ca.gov/glossary/glossary-b.html#b</ref><ref>http://www.powerstream.com/Size.htm</ref> |
;Sizes: | ;Sizes: | ||
* AAA | * AAA | ||
Revision as of 17:43, March 3, 2017
A Battery is a device that stores chemical energy and produces electric current. Batteries may be single-use or rechargeable.
Design
Batteries are generally composed of two electrodes (the anode and cathode), electrolyte, and a semi-permeable barrier. Traditionally, these batteries are pictured as a pair of discrete electrodes in a bath of acid. However, battery cells are almost always designed with the electrodes as a thin, flexible sheets. They are then rolled together with a separator in between, and then submerged in a comparatively small about of electrolyte.
Function
Batteries work by transferring particles from one electrode to the other, while causing electrons to flow from one external battery terminal to the other. The anode undergoes oxidation, which generates electrons (electricity). Meanwhile, the cathode undergoes a reduction reaction, which takes in electrons. On the outside of the battery, these electrons attempt to flow from the negative terminal to the positive, creating an energy flow. Placing a load in the circuit, between the negative and positive forces the electrons to pass through the load item, and perform some kind of work. Meanwhile, the internal electrodes continue to react as long as electrons can flow from one electrode to the other, and the required materials are still present.[1][2]
Some batteries are rechargeable, which means that this process can be easily reversed. By forcing electrons to pass through the battery in the opposite direction, the particles which moved from the anode to the cathode are pushed back to the cathode. Once complete, the external power source can be disconnected, and the anode will again try to transfer particles to the cathode, when the external terminals are again connected.
Small batteries
These are some common sizes used for flashlights and electronic devices. They are described by the chemistry used in the battery. Single-use batteries are usually described as alkaline while rechargeable batteries may be Nickel-Cadmium (NiCad), Nickel Metal Hydride (NiMH), or Lithium Ion (Li-ion). [3][4]
- Sizes
- AAA
- AA
- C
- D
- 9V
Large batteries
Large batteries are usually of the rechargeable lead-acid type. Applications include starting batteries for automobiles and deep cycle batteries for leisure use.[5] Starting batteries are usually 12 volt batteries containing six lead-acid cells. Large vehicles, such as trucks and buses may have two 12 volt batteries connected in series to give 24 volts.
Even larger batteries are used for powering Submarines[6] and Electric Vehicles, such as forklift trucks.[7]
See also
References
- ↑ http://electronics.howstuffworks.com/everyday-tech/battery3.htm
- ↑ http://electronics.howstuffworks.com/everyday-tech/battery2.htm
- ↑ http://www.energy.ca.gov/glossary/glossary-b.html#b
- ↑ http://www.powerstream.com/Size.htm
- ↑ http://aboutbatteries.batterycouncil.org/What-is-a-lead-battery
- ↑ http://www.fleetsubmarine.com/battery.html
- ↑ http://www.manbatindustrial.co.uk/forklift-batteries/
