# Methods Charging and Discharging of Batteries

Friends, today in this article we will know about the methods of charging and discharging the batteries, about the previous legislation while charging the battery. In this article, I am going to give information about all these in a very good way. So let’s get started.

## Methods Charging and Discharging of Batteries

The current required to charge the batteries is only DC. It just happens. If the power supply a. If it is C. then A.C. Rectifier or motor generator set can be used using step down transformer along with the motor in the supply. The following methods are used to charge the battery-

### 1. constant current method

In this method the charging current constant is kept but the supply voltage is changed to reduce over the increase back e.m.f of the cells i.e. a current equal to the number of positive plates in the cell is sent through the battery until It should not be fully charged. The charging current is controlled by a rheostat connected in the circuit. The value of the charging current is selected such that there is no excessive gassing and the cell temperature does not exceed 110°F at the final stage of charging.

This method of charging is not commonly used because initially a fully discharged battery requires a higher off charging as the battery reaches a state of full charge. This method takes more time than other charging methods.

### 2. Constant potential method

In this method the charging voltage constant is kept throughout the charging period. Initially when the battery is in the discharge condition, the charging current is kept high and gradually drops off as the battery picks up the charge and back e.m.f. increases.

### 3. trickle charging method

When we charge the battery at low rating potential then we can keep that battery in fully charged condition and then we call this type of charging as trickle charging. By this type of charging, we always keep the battery fresh and can supply energy at the time of need.

Note: If we want to charge a battery through bulb resistor or variable resistance, if we want to charge a battery through bulb resistor, then we need to charge it 220V DC. It has to be charged from the supply, due to which the carbon fiber is applied to the resistor made of the lamps, which after connecting in parallel with it, we connect it in series with the battery and then use it, then we use the lamp Instead of a resistor, a converting resistor is used. The charging current used is usually 5 to 8 amps but the initial charging time is short. And then for initial charging, 2-3 ampere current is used.

## Precautions of Battery Charging

Whenever we want to charge the battery, we have to take some rules before charging it. they are of the following types

(a) The terminal- (positive and negative) of the power supply should be connected to the same terminal (positive and negative) of the battery. For example: positive of supply should be connected to positive of battery and negative of supply should be connected to negative of battery.

(b) The plate should be well covered with electrolyte.

(c) When we charge the battery, its exhaust plug cover should be removed.

(d) The room should be fully ventilated.

(e) The battery should not be left idle for a long time.

(f) The terminal of the battery should be cleaned thoroughly and greased with it.

(g) When the battery is to be charged or discharged, it should not be used at high rate.

(h) We should not bring a burning flame near any conducting cell (battery).

(i) When we buy a battery, we are given some instructions, which are given by the manufacturer. We need those instructions.

### what did you learn today :-

Now you must have known that methods of charging and discharging batteries, Charging and Discharging of Batteries, Precautions while charging battery. You must have got the answer of all these questions very well.

I hope that you have liked the information given by me, if you have any question / suggestion in your mind, then you can tell me by commenting below, I will definitely answer your comment. If you liked this post then you can also share it with your friends and relatives.