Small alkaline cells, Physics

Assignment Help:

SMALL ALKALINE CELLS:

Hermetically sealed Ni-Cad cells are produced in the same size and shape as their primary counterparts. They are small, portable and maintenance free, but have the added advantage of being rechargeable.

The plates are constructed in a similar manner to the larger Ni-Cad cells, the separator being a thin porous material. The electrolyte is fully absorbed by the plates and separator in a similar manner to the Varley type cell. With steel or plastic being used for the case.

Special vents are fitted to each cell, these allow the escape of gas but prevent the entry of oxygen and electrolyte leakage.

The nominal voltage of a fully charged cell is 1-25 volts and these can then be interconnected to form batteries.

A 10 hour rate capacity is generally used with an end of life voltage of 1.1 volts, it is possible to discharge the cells further but damage will occur if allowed to go below 1 volt.

Charging should be carried out using a constant current at the 10 hour rate, total charge taking approximately 14 hrs, the end of charge "on charge" voltage being 1-45 volts. Overcharging should be avoided, it produces heat and shortens the long term life of the cell.


Related Discussions:- Small alkaline cells

Determine the photon flux, Suppose that the x rays are emitted from a focal...

Suppose that the x rays are emitted from a focal spot isotropically. The photon flux is 3.28 x 10 6 photons mm -2 sec -1 at a distance of 0.75 m from the focal spot. What is the

Parallel forces, Examples of like and unlike parallel forces?

Examples of like and unlike parallel forces?

What is radioactivity, What is radioactivity? Radioactivity: The proc...

What is radioactivity? Radioactivity: The process of spontaneous disintegration of the nuclei of heavy elements with the emission of certain radiations is known as natural ra

Explain copper losses, Copper losses: These losses occur because of ohmic ...

Copper losses: These losses occur because of ohmic resistance of the transformer windings. If I1 and I2 are primary and secondary currents correspondingly and R1and R2 are the res

Nicols prism, give full detail of nicols prism about 20 to 30 pages

give full detail of nicols prism about 20 to 30 pages

What is the acceleration of upper deflection plate, In a certain cathode-ra...

In a certain cathode-ray tube, a beam of electrons, moving at a constant velocity, enters a region of constant electric force midway among two parallel plates that are 10.0 cm long

Calculate the transmit power required from the satellite, 1.  There are 40 ...

1.  There are 40 such microwave hops in tandem.  What is the end-to-end C/N of the link? 2.  Assume now that these 40 hops are replaced by a single satellite hop as shown below.

Explain ballistic flight, BALLISTIC FLIGHT:  "A flight in which a proje...

BALLISTIC FLIGHT:  "A flight in which a projectile is given a starting push and is permitted to move freely due to inertia and under the action of gravity is known as ballistic

Optics, Construction and working of michelson interferometer,.how will you ...

Construction and working of michelson interferometer,.how will you use it to measure the wavelength of a monochromatic light.

Derive first law of thermodynamics, Derive First law of thermodynamics ...

Derive First law of thermodynamics When an amount of heat energy is supplied to the system, part of it enhances internal energy of the system and remaining is utilized by the s

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd