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

Define potential difference, In an electric field difference among potentia...

In an electric field difference among potential energy of two points A and B is described as equal to the amount of work done (by external agent) in moving a unit positive charge f

Ripple tank, Ripple tank The concept of reflection and refractio...

Ripple tank The concept of reflection and refraction of light waves can be understood by the study of reflection and refraction of waves on water. The water waves travel

Illustrate the current-voltage characteristic curves, Illustrate the curren...

Illustrate the current-voltage (I-V) characteristic curves if a junction diode in reverse and forward bias.

Optics, how does a magnifying glass work to produce a large or smaller imag...

how does a magnifying glass work to produce a large or smaller image?

When were foundations of quantum mechanics established, When were foundatio...

When were foundations of quantum mechanics established? Foundations of quantum mechanics : The quantum mechanics foundations were established throughout the first half of th

What is the classification of thermodynamic system, i. Open System - Here t...

i. Open System - Here the system boundary is like energy and matter can enter or leave the system freely. Infect the system boundary here is imaginary. ii.Closed System - Here t

Direction of the angular velocity vector, Direction of the Angular Velocity...

Direction of the Angular Velocity Vector In physics, the angular velocity is described as the rate of change of angular displacement and is a vector quantity (more preci

Law of motion, deduction Newton law - KEPLUR law

deduction Newton law - KEPLUR law

Torque and equilibrium, What is the effect of torque and equilibrium on tap...

What is the effect of torque and equilibrium on taps,doors,handlebars and bicycles?

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