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Batteries

Bio med tech course 1

QuestionAnswer
What kind of voltage source is the battery? Chemical voltage source
Voltaic cell has three basic components what are they? Negative Plate Positive Plate Electrolyte
What is an electroylte? An acid based electrically conducting liquid or paste
What are primary cells? Cells that once discharged, must be disposed of
Why are primary cells referred to as dry cells? Because they have their electrolyte in paste form
What does shelf life of a primary cell mean? The amount of time the cell can remain in storage and still retain its usability
The self life will loose----of their capacity over three years? 20%
What are the five main primary cell types? (Carbon-zinc (Carbs) (Alkaline-manganese (Always) (Mercury (Make) (Silver oxide (Suzy Like) (Lithium (Lemons)
Carbon-zinc (carbs) used for? Portable devices (Radios, tape players, toys, etc)
Alkaline (always) used for? Portable devices (Radios, tape players, toys, etc)
Mercury (make) used for? Lower power applications (wathces, hearing aids pacemakers, cameras, test equipment)
Silver-oxide (Suzy like) used for? Lower power applications (wathces, hearing aids pacemakers, cameras)
Lithium (lemons) used for? Liquid crystal displays, Computer memory, Calculators sensor circuits
What is the difference between Primary cells and Seconday cells? Secondary cells can be recharged.
What is the normal charge of Secondary cells? Normal charge is at 115% of the indicated battery voltage
What are Secondary cells referred to as? Wet cells due to the free flowing liquid electrolyte used
What are the types of Secondary Cells? Lead acid, Nickel-cadmium (Ni-Cd), Nickel-metal hydride, Lithium Ion
How are secondary cells measured? They're measured by the amount of ampere-hours (Ah) a battery can supply during discharge.
Secondary cells can supply how many ampere for how many hours? Can supply 1 ampere for 10 hours is a 10 Ah battery.
How to calculate the time of charge in hours for the secondary cell? Rating of battery (devided) charge current
How to calculate the time of discharge in hours? Rating of battery (devided) discharge current
Created by: 100000215936034