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How a Battery Balancer Works

Posted by Carl Clark on 11/1/2018
How a Battery Balancer Works

This is a guide we’ve put together that explains how Battery Balancers work and what improvements are made to the lithium batteries when they are properly balanced. More information can be found under “How the GNE Balancer Works” and “Specification of Battery Balancer” on our website. Please give us your questions and comments about this guide!

How the Balancer Works to Protect Batteries

This diagram tells you how the balancer works. Each battery is compared to a cup. Each balancer is like a pump. With the pumps, all the cups will have the same level of water because the water will flow from the higher cups to the lower ones. The balancers are connected in parallel to the batteries. They won’t affect the charging or discharging of the batteries.

All battery balancers connected to a battery pack interact with each other; not just the neighboring balancers. Suppose there are 4 cells of the following voltages: 3.1V, 3.2V, 3.3V, and 3.4V. Power will be transferred from 3.4V to the other batteries. The lower batteries will be charged by the higher ones. Finally they will reach the same level.

What Happens to Batteries When They Aren’t Balanced?

The individual cells in a battery pack are rarely an exact duplicate of all the cells in the battery pack. 

In actual practice, when a pack of batteries reaches a specified charge cutoff voltage then the charger will shut off. If one cell in a pack reaches that voltage before other cells reach a full charge it will cause the charger to shut off – prematurely denying the balance of the pack a full charge.

Conversely when the weakest cell in a pack reaches its discharge cutoff voltage it will show as the discharge point and shut down the pack prematurely – thereby denying the user the balance of energy the other cells have stored.

The battery equalizers prevent this from happening. This process yields up to 30% more power and will extend the life of the battery pack.

Five Advantages of Using a Battery Balancing System

1.   Keeps your batteries voltage difference within 10mV!

2.   Keeps your batteries safe all the time with no overcharging of over discharging.

3.   Prolongs your battery lifespan 2~3 times.

4.   A very simple installation.

5.   A low price. You pay a small amount of money to protect your battery. Compared to the cost of replacing your expensive lithium battery, the balancer is very cheap.


How to tell if the Battery Pack Balancers are Correctly Installed

Measure the voltage of the batteries with a multi-meter to see if each of the batteries voltage is normal. 

Listen to the balancers. If they are connected correctly, they will produce a high-frequency sound. Because the sound is quiet, you need to get close to the balancers. The more balanced the batteries are, the smaller the balance current it will have, and the softer sound they will make and vice versa. If they are connected the wrong way, you won’t be able to hear the sound.

Order Battery Balancers Here!

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