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

Expermient of demonstration vernier, Demonstration vernier Two pieces o...

Demonstration vernier Two pieces of tongued and grooved floor board about 1 m long can be used to make this apparatus. Saw 7 cm off the tongued board and glue it into the groov

Eddington limit, Eddington limit (Sir A. Eddington) The theoretical li...

Eddington limit (Sir A. Eddington) The theoretical limit on which the photon pressure would go above the gravitational attraction of light-emitting body. i.e., a body emitting

Magnetism, what is the principle on which deflection magnetometer work?

what is the principle on which deflection magnetometer work?

Determine the acceleration of the car, While travelling in a straight line,...

While travelling in a straight line, a car uniformly alters its speed from 50 kilometres per hour to 110 kilometres per hour in 5 seconds.  The acceleration of the car during

What are semiconductors, What are semiconductors? Give an example for n-typ...

What are semiconductors? Give an example for n-type semiconductors. Semiconductors are materials having electrical conductivity among that of insulators and conductors. This i

Materiel heat Sinking, Respected Sir, I am only knowing about materia...

Respected Sir, I am only knowing about material name that can be sink heat much longer area, it can be possible or not? if it possible, how to its work to sink.? Please..

Can multiple illuminators change colors simultaneously, Can multiple illumi...

Can multiple illuminators change colors simultaneously? Yes. Usually the standard disc rotating motors are of the synchronous form, very reliable, and geared to the most suffi

Piezoelectric behavior in solids, The world is derived from the Greek world...

The world is derived from the Greek world which means to squeeze or press. It is usually described as the generation of electricity as a result of mechanical pressure. "When mechan

What is index fiber, What is index fiber? How you define the modes in an op...

What is index fiber? How you define the modes in an optical fiber? Give a relation between core diameter and numerical aperture. Ans.:  The index profile of a single mode fi

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