What is Battery?

A battery in a device that stores energy for later use. The word battery is limited to an electrochemical device that converts chemical energy into electricity, by use of a galvanic cell. Batteries consist of one or more galvanic cells. A battery is an electrical storage device. Batteries do not generate electricity, they store it. As chemicals in the battery change (Charge or Discharge) , electrical energy is stored or released. In rechargeable batteries this process can be repeated many times. Batteries are not 100% efficient – some energy is lost as heat and chemical reactions when charging and discharging.

battery-diagram-greenlings

What is a Lead acid battery?

Lead Acid Battery consist of Lead oxide (PbO2) as positive and spongy lead (Pb) as negative with electrolyte Acid (diluted H2SO4) and generates 2.4V per Cell.

 

What is Specific Gravity?

The weight of the sulfuric acid electrolyte compared to water (Sp Gr of water is 1). The Specific gravity is a measure of state of health of a battery.

  1. Absorb relatively small power surges.
  2. Smooth out noisy power sources.
  3. Continue to provide power to equipment during line sags.
  4. Provide power for some time after a blackout has occurred.

 

What is Electrolyte?

In a lead-acid battery, the electrolyte is sulfuric acid diluted with water. It is a conductor that supplies water and sulfate for the electrochemical reaction:

 

What is Battery Voltage ?

It is the units of force or pressure of electric current or unit of measuring electrical pressure, all batteries is rated in volts DC (Direct Current). The voltage of a battery depends on the number of cells connected in series each cell of lead acid battery has 2 volt nominally.

 

What is Shelf life of a Battery?

All batteries by virtue of nature will have some self-discharge. If the capacity loss due to self-discharge is not compensated for by recharging, the battery capacity may become unrecoverable and battery will not give expected useful life or normal cycle life.

 

What is SLI or Automotive Battery ?

Electra Automotive batteries are designed in such a way that it can support Cranking application. These batteries provide a very high current typically 2 to 3 times its rated capacity for small duration to start a vehicle engine. The purpose of these batteries is to provide high current to start an engine and then vehicle runs with the power generated from the Dynamo / Alternator.

 

What is Sulfation ?

Growth of lead sulfate crystals in Lead-Acid batteries which inhibits or resist current flow. Sulfation is caused by storage at low state of charge or when the battery has been left for a considerable time in a discharged condition.

 

What are common Causes of Failures ?

A . Using an undersized battery.
B.  Loss of electrolyte due to heat or overcharging
C.  Overcharging with voltages greater than 15.1 volts
D.  Undercharging
E.  Old age
F.  Vibration
G.  Deep discharges (leaving your lights on)
H.  Using tap water
I.  Corrosion
J.  Freezing, and
K. Overheating.

 

What are the features that should be considered when buying a battery”?

Size: The dimensions of your original battery

Power: The Ampere hour required to power your vehicle

Warranty: Automotive batteries are backed by a warranty package. Chose the one that is right for your vehicle’s needs.

 

What can excessive heat do to a battery ?

Heat can deteriorate a battery’s life quicker by evaporating the water from the electrolyte, and corroding and weakening the positive grids.

Can we use Tap Water for topping up ?

Tap water or any other water available in nature cannot be used for topping up of battery. DM water or De-ionized water is the most common or suggested type of water suitable for topping-up. The mineral content in tap water or natural available water may be minimal in some water, but  the gassing effects from charging coupled with evaporation, may leave behind mineral contaminates in the electrolyte solution in higher level. As a result, the minerals will have a cumulative effect inside the battery. Depending on the type of impurity, the physical characteristics as well as the performance of the battery may be affected and fail premature.

Can we add acid to the Battery ?

Under normal operating conditions, you never need to add acid. For a standard auto or inverter or tubular battery, only distilled, deionized water should be added to achieve the recommended levels (Max-Min).