Semco university – All about the Lithium-Ion Batteries


How to spot a lithium-ion battery failure before it’s too late

Lithium-ion batteries are becoming increasingly popular due to their ability to store and deliver a large amount of energy in a small, lightweight package. Unfortunately, they are also prone to failure, which can lead to dangerous situations. This blog post will explain how to spot a lithium-ion battery failure before it’s too late, so you can take the necessary steps to prevent any damage or injury. We’ll discuss the different types of battery failure, the signs to look out for, and how to prevent them.

Capacity Fade

Capacity fade is one of the most common types of lithium-ion battery failure. It occurs when the capacity of the battery decreases over time, leading to shorter runtimes or shorter periods between charges. This is usually caused by prolonged or heavy use or simply age.

There are several signs of capacity fade that you should look out for your device may suddenly shut down even when you’re sure it has enough charge, or it may take longer than usual to charge up again. You may also notice that your device runs out of juice faster than it used to when you first bought it. If you’re noticing these symptoms, it’s a good sign that your battery is experiencing capacity fade.

Fortunately, this type of lithium-ion battery failure is fairly easy to fix. You can try to reduce the amount of stress on the battery by avoiding charging it to full and using the device less. Also, be sure to always use the correct power adapter and charger for your device, and make sure to store your device in a cool, dry place when not in use.


Self-discharge is one of the common causes of lithium-ion battery failure. It occurs when the battery has an imbalance in its cells, which causes the chemical components to break down and dissipate energy as heat. This eventually leads to a decrease in the battery’s capacity over time, eventually leading to its failure. The rate of self-discharge depends on the temperature, age, and chemistry of the battery, but it can be significantly accelerated by exposure to high temperatures and humidity. To reduce the rate of self-discharge, lithium-ion batteries should be stored in cool, dry environments. Additionally, manufacturers recommend regularly balancing the voltage of the cells in the battery pack to reduce the risk of self-discharge.

Voltage Depression

Voltage depression is one of the most common causes of lithium-ion battery failure. Voltage depression occurs when the voltage of a battery drops below the threshold of 2.8V per cell, or 3.6V for a single-cell battery. This drop in voltage can be caused by a variety of factors, such as overcharging, discharging at too high of a rate, or high temperatures.

The effects of voltage depression can be quite severe and may lead to premature failure of the battery if left unchecked. When the voltage of a lithium-ion battery drops below the threshold, it becomes increasingly difficult to recharge the battery as the voltage required to initiate a successful charge increases significantly. Additionally, when the voltage drops too low, it can permanently damage the cells in the battery, leading to reduced capacity and decreased cycle life.

In order to prevent voltage depression, it is important to ensure that the battery is not overcharged or discharged at too high of a rate. Additionally, it is important to avoid using the battery in temperatures above the manufacturer’s recommended maximum temperature. Finally, it is also important to use a proper battery management system to monitor and manage the battery’s health. Doing so will help to ensure that the battery stays within its optimal operating range, allowing for longer life and better performance.

Cell Balancing

Cell balancing is a crucial factor in keeping lithium-ion batteries running safely and optimally. Balancing is the process of equalizing charge among the cells in a battery pack. This equalization helps prevent voltage depression or imbalances in the cells, which can be caused by improper charging, overcharging, or other environmental factors.

When a battery is out of balance, it may cause the individual cells to become overcharged or undercharged. In extreme cases, this can lead to thermal runaway, a dangerous and uncontrolled increase in temperature that could potentially cause a fire or explosion.

Cell balancing should be performed regularly for any battery pack, even when it has been properly maintained. This helps ensure that each cell remains at its optimal voltage level. To balance a battery, you’ll need a charger designed for lithium-ion batteries. Chargers come with built-in algorithms that measure and adjust the charge levels of each cell.

Many modern lithium-ion batteries have built-in systems to help maintain balance. These are typically called “balance chargers” or “balancers”. By using these devices, you can easily keep your battery balanced and functioning properly without having to manually monitor or adjust the charge levels of each cell.

If you use a battery without any built-in balancing technology, it’s especially important to check the charge levels of each cell regularly and balance them as needed. By doing this, you can help prevent serious damage from occurring and extend the life of your battery pack.

About Semco – Semco University is an educational website that is catering to the needs of students and researchers. Offering information on Lithium-ion batteries. The resources and content are compiled from various sources including manufacturers, test labs, crowdsourcing, etc. Our motto is to provide a viable resource for companies, students, and enthusiasts interested in participating in the Li-ion Battery industry. Our initiative is to make people aware of the benefits, and opportunities of the revolutionary Lithium Batteries for multiple applications.

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