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

Friction a necessary evil, Friction has several disadvantages but life is i...

Friction has several disadvantages but life is impossible without friction because friction has many benefits also.

Radial acceleration..., So I have a question here and I am totally lost: A ...

So I have a question here and I am totally lost: A car starts from rest and accelerates at a constant rate of 1.1 m/s2. If the radius of the car wheels is 29.0 cm, and the final an

Electromagnetic induction, The structure of a simple d.c. motor and explain...

The structure of a simple d.c. motor and explain briefly how it works

Free Fall, what is the acceleration due to gravity?

what is the acceleration due to gravity?

What is the band width?, A data transmission rate; the maximum amount of in...

A data transmission rate; the maximum amount of information (bits/second) that can be transmitted along a channel is called band width.

Significant numbers has in a measured quantity, Rules to verify how many si...

Rules to verify how many significant numbers has in a calculated quantity: 1.  All nonzero digits are significant. As like 457 cm has three significant values; 0.25 g has two si

Projectile, derive an expression for time of flight of horizontal projectil...

derive an expression for time of flight of horizontal projectile

Heat distribution system, Consider the water heat distribution system shown...

Consider the water heat distribution system shown below where: The fractions refer to the fraction of the stream ?owing, e.g. 20% of the stream leaving the 100,000 Btu/ hr heate

Define poisson distribution in ideal gas, Define Poisson Distribution in Id...

Define Poisson Distribution in Ideal Gas? Consider a monatomic ideal gas of total Ñ molecules in a volume V ˜ Show that the probability, P N for the number N of mole

Heavy water is often used as a moderator in thermal nuclear, 'Heavy water i...

'Heavy water is often used as a moderator in thermal nuclear reactors.' Give reason.

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