Common faults in the battery

Common faults in the battery

The following faults are commonly found in batteries.

Self-discharged: Batteries are gradually discharged when left unused. This is called self-discharge. Depending on the age of the battery, its ampere hour capacity is charged from 0.2% to 1% percent per day. Its increases with increasing temperature but the amount of Self discharge is normal rule but fast self discharge above 3% indicates the battery fatal error. Self is usually discharged for the following reasons.

a)Internal Chemical Process: Small batteries often accumulate antimony in the negative plate when used for work, so it creates a short circuit in itself and uses the charge of the negative plate.

b)Leakage current: Dirt and acid waste accumulates on top of the battery surface, creating a thin transport path between positive and negative battery lugs, which discharges the battery.

This problem can be overcome by occasionally cleaning with a rag. A leak can be created in the bottom of battery cells by depositing dirt and waste.

The following tasks need to be done regularly to reduce self-portraits.

1.The battery must be kept clean.

2.Neutral water should be used in batteries rather than pure minerals or distilled water.

3.If the battery is left unmarked, booster charging should be done once per month at the rate of (1/3*capacity) otherwise Thambrule (1/3*Cpacity) trickle charging should be done at the trickle charging rate.

Overcharge: Overcharge is a serious problem with batteries. Overcharging the battery causes the following errors.

a)Frequent topping up is required on overcharged batteries.

b)Excessive use of active materials reduces battery life.

c)Going over-charge can cause the battery plate to swell, erode or become intact.

d)Overcharging may result in a change in the entire electrolyte mass.

e)Plate & separation can be ruined by exposure to air as electrolyte levels drop rapidly.

f)Active materials can fall off and accumulate in the upper floors, creating short circuits.

g)The container may burst. Topping up with the right amount of distilled water.

h)The relative importance of the electrolyte in the cells may be more or less determined by load test or cadmium test.

i)The color of the electrolyte may change. The active materials may fall from plates and mix with the electrolyte by over charging. This can be done by testing the load of the battery and knowing the internal condition of the battery.

   

What is a fault battery?

Ans- 

A car wont crank and starts eventually. This happens for low charge battery or left the car on for long time 

How can you tell if car battery needs replacing?

Ans-

1.Slow engine crank
2.Low battery fluid level
3.check engine light
4.Swelling and bloating battery case
5.Battery Leak
6.Old age

What is the cause of battery failure?

Ans- 

1.Lack of maintenance

2.Deep Discharging

3.Aging

4.Heat

5.Vibration

6.Fast Charging

7.Loss of water

8.Under Charging

How often are car batteries replaced?

Ans-

A general rule of thump that you should change your car battery about every after three years.

Why does my car battery always need a boost?

Ans-

Usually after 3–4 years the battery is unable to hold its charge. Starting to wear and tear. Buy a new one if that is the case. The car battery is an important component of the car and should be checked up once a month ideally.

As a mechanic, what is the most common fault on a car?

Ans-

Tires , brakes, and batteries. And pretty much in that order. 

What causes batteries to explode?

Ans-

Any battery can explode given the wrong conditions. This usually happens if the charge (or discharge) current is too high causing the battery to heat up and create internal pressure. Car batteries that have exploded because the vent caps were blocked although this is quite a rare occurrence. Most common are Lithium batteries that develop a fault or have their terminals short circuited. They then conduct extremely high currents for their size, overheat and explode in flames.