Charge and discharge characteristics of nickel cadmium cell, Physics

Charge and discharge characteristics of nickel cadmium cell:

During charging and discharging the electrolyte acts only as an ionised conductor, transporting electrons from one plate to the other, its specific gravity remaining constant.

On discharge the terminal voltage initially falls rapidly and then remains constant for most of the discharge cycle, dropping rapidly again

when the battery is nearly fully discharged. When charged, the terminal voltage initially rises rapidly and then settles to a gradual increase. A second rapid rise takes place as the battery reaches the fully charged condition, at this time gassing takes place, hydrogen being released at the negative plates, oxygen at the positive plates, this combination of gases is explosive. Prolonged gassing should be avoided as it reduces the water content of the electrolyte and causes overheating of the battery, a slight amount of gassing, however, is necessary to ensure charging is complete.

The terminal voltage remains constant for most of the batteries life and the specific gravity of the electrolyte remains unchanged, the only way of determining the state of charge of the battery therefore, is to carry out a full charge followed by a capacity test.

During discharge the plates absorb electrolyte to such an extent that the level may disappear from view. As the battery is charged, the electrolyte is forced back out of the plates, a point to note when topping up the cells.

Posted Date: 9/13/2012 2:13:06 AM | Location : United States







Related Discussions:- Charge and discharge characteristics of nickel cadmium cell, Assignment Help, Ask Question on Charge and discharge characteristics of nickel cadmium cell, Get Answer, Expert's Help, Charge and discharge characteristics of nickel cadmium cell Discussions

Write discussion on Charge and discharge characteristics of nickel cadmium cell
Your posts are moderated
Related Questions
application of huygen''principle


what will happen if gravity becomes zero?is it possible in earth?

pseudo force: A "force" that arises since an observer is naively treating an accelerating frame like an inertial one.

A high-performance dragster with a mass of m = 1333 kg can accelerate at a rate of a = 23.5 m/s2. Write an expression for the magnitude of the net force, FNET, that propels the dr

The collision between two bodies be elastic if bodies are?

The Zinc Blende or Sphalerite Structure. Zinc blende is same to diamond cubic structure, but the two FCC sub-lattices are occupied by atoms of two dissimilar elements. Some of

Explain the Nuclear Notation? Chemical reactions deal with the number of electrons exchanged or shared.  Nuclear reactions, on the other hand, involve protons and neutrons and

A rocket weighs 9800N. What applied force gives it a vertical acceleration of 4m/sec/sec?

Why it is in general considered easier to determine the electric potential at a given point in space or at a given set of points in space due to a continuous charge distribution th