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Lead Acid Battery Charging Current Calculation, Charging Rate and Amps

# Lead Acid Battery Charging Current Calculation, Charging Rate and Amps

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If we take a look at the things that we have near us we will see lead-acid batteries all around sd. They are present in the power backup systems and they are present in the automobile engines as well. While the other batteries can be used in these applications, the benefits of lead-acid batteries make them the best choice.

However, when these batteries get bad this can cost you a lot to replace. In this case, these batteries mostly get bad with the bad routine of charging. So, here we will be discussing the routine of charging current that you need to know for charging the lead-acid batteries.

How much current does it take to charge a lead-acid battery?

As the current is the calculation of the flow of electricity through the battery it can differ according to the different conditions. The current taken by the battery when the charging process starts is different from the current taken by the battery when it is half charged.

So, keeping in consideration that the battery is being normally charged here we will be discussing the amount of current needed by the battery for charging.

The Amount of Current When the Charging Process Starts

When the battery charging process is started the voltage difference is small. This means that the current required at this point is a bit more for the healthy charging of the battery. So, in this case, the charging current must not exceed 0.3*C amps which are equal to the 3 percent of the rated capacity.

It is because this small current will help in starting the charging process without causing any adverse effects on the battery.

The Amount of Current During the Charging Process

When the battery has been charged to some extent the voltage difference increases. As the voltage difference increases the amount of current required decreases. So, as the battery is beginning charged the current required decreases to 0.1*C amps which is equal to 1 percent of the rated capacity.

This is needed so that the battery charging process goes on without any additional heating that may damage the battery.

The Amount of Current When the Charging Process is Complete

When the charging process is complete the voltage difference reaches its highest value for the battery. This is the time when the current must be equal to 0. This means that the charging process must be switched off. In some cases, float charging, or trickle charging can also be used with the current equal to 0.5 percent of the rated capacity of the battery.

How do you calculate the battery charging rate?

Sometimes it is very important to know how long the battery will take to charge when there are time-sensitive cases. The good part is that with a little bit of information about the battery and the charger you can easily implement the formula and calculate the charging rate of the battery.

So, here we will be discussing the things that you need to know and how you can calculate the charging rate of the battery.

Things That You Need to Consider

When you are looking to calculate the charging rate of the batter you need to consider the following things:

The amount of current in amperes which is usually mentioned on the charger.

The battery capacity. This is mentioned in Ah usually on the battery or the documentation that comes with the battery.

Knowing these two things is very important as you can calculate the charging rate when you know these.

Calculating the Charging Rate of Your Battery

When you are calculating the charging rate of the battery you need to divide the battery capacity by the total current given by the charger. This will give you the charging rate in hours. for example, if you have a battery of 50 Ah and the charger provides 10 amps of current then the charging rate will be 50/10 which will be 5 hours.

Note:

When you are calculating the charging rate for the battery you need to know that this is a value calculated for the best case without ignoring several factors that can affect the rate. So, when you are charging the battery, things like wire resistance and heat produced by the battery can change this charging rate.

How many amps are required charge a 12 volt battery?

One of the most common types of battery used for automobile engines and power backup systems is the 12-volt battery. So, when you are charging these batteries what is the number of amps that you need?

Well, here we will be discussing different cases where different values of amps will work fine.

The amps You Need to Slow Charge the 12-volt Battery

For most of the 12-volt batteries that we use the best amount of amps for slow charging them is 10 amps. Although the slow charging with 10 amps takes a bit of time of about 12 to 24 hours depending on the capacity of the battery. This is the best for the long life and health of the battery.

The amps You Need to Fast Charge the 12-volt Battery

When you are looking to fast charge the battery you can use 20 amps which will make the charging time shorter. With the fast charging on higher amps, the charging time will become almost half or even shorter than that. However, this is not the best option for the long term.

Which Type of Charging is Better and What are the Effects of Charging Methods

When we use fast charging with higher amps the battery life is reduced. This is because of the production of excessive heat and other factors. So, we can say that the best way of charging the battery is slow charging. However, you can still use fast charging sometimes when there is some necessary need.

Conclusion

The way you charge the battery can affect a lot on its life and performance and life as well. One of the most important things about charging the battery is current and the other is the charging rate. Here we were discussing both of these. 