Lithium-Ion Battery Voltage Chart

By Benjamin Strusnik March 14, 2023

Every solar system owner should understand how the components in their system work. To achieve this, looking at a lithium-ion battery voltage chart can be a great place to start.

Lithium-ion batteries are one of the most popular batteries on the market. They’re found in almost every electronic device you can think of from cell phones to even solar power backup storage.

They have completely revolutionized the way we power various portable devices and electric vehicles. This is due to their versatility with loads of options available depending on what your electrical needs are.

The demand for these batteries has grown exponentially with many of the world’s population trying to live sustainable lives by turning to solar panels and electric vehicles. Lithium-ion batteries are projected to significantly improve in both performance and sustainability.

However, before we get there, we need to understand how to read the voltage and discharge charts associated with these batteries.

In this article, we will guide you through what a typical voltage chart looks like, as well as touch on the importance of the voltage charge relationship in these batteries.

What Are Lithium-Ion Batteries

Lithium-ion batteries are a type of rechargeable battery that is used in a wide variety of appliances. They are called lithium-ion batteries because they use lithium ions as their primary charge carrier.

The primary charge carrier’s job is to move between the anode and the cathode during periods of charging and discharging.

The anode of the battery is generally made of graphite, while the cathode is made up of lithium complex.

Lithium-ion batteries, such as the 12v LiFePO4 battery, are different than other types of traditional batteries, as they have high energy densities, longevity, and a low-self discharge rate when they aren’t powering a device.

Furthermore, they are incredibly lightweight, and the time taken till full recharge is significantly faster than other types of batteries.

Unlike other batteries, such as marine batteries, they are unable to tolerate high temperatures. They also have a slight problem with overcharging. This can be hazardous because it tends to lead to fires and explosions in extreme cases.

However, these hazards are due to mismanagement and incorrect care for your batteries. One should always follow voltage charts as closely as possible to prevent damage and potential risks.

Voltage Chart for Lithium Batteries

There are different voltage sizes of lithium batteries with the most popular being 12 volts, 24 volts, and 48 volts. Each one has a different voltage rating at a specific discharge capacity.

It is also beneficial to understand the voltage and discharge rate of a 1-cell lithium battery. Use the chart of battery voltages chart below to determine the discharge chart for each battery.

Charge Capacity (%)	Voltage (1 Cell)	Voltage (12 Volt)	Voltage (24 Volt)	Voltage (48 Volt)
100	3.40	13.6	27.2	54.4
90	3.35	13.4	26.8	53.6
80	3.32	13.3	26.6	53.1
70	3.30	13.2	26.4	52.8
60	3.27	13.1	26.1	52.3
50	3.26	13.0	26.0	52.2
40	3.25	13.0	26.0	52.0
30	3.22	12.9	25.8	52.5
20	3.20	12.8	25.6	51.2
10	3.00	12.0	24.0	48.0
0	2.50	10.0	20.0	40.0

As you can see the voltages are significantly different across the different types of batteries. All the ratings above are about a battery that is not being charged.

When the batteries are on charge the respective voltage ratings would be 3.65V for the 1 cell, 14.6V for the 12-volt, 29.2V for the 24-volt, and 48V for the 48-volt battery.

The 12V lithium-ion battery voltage chart is the most common chart you will see when purchasing batteries, but it is always a good idea to get comfortable and understand how the different sizes affect the charge.

Voltage vs Charge Relationship

The relationship between voltage and charge is often overlooked, but it is an incredibly important concept to lithium-ion batteries.

This relationship is important because it determines the amount of electrical energy that can be stored in the batteries and the rate at which the energy can be released.

The voltage of a lithium-ion battery directly correlates to the quantity of charge that can be stored there. The battery can hold more energy with a greater voltage. To avoid overheating or damaging the battery, the voltage must be properly regulated.

Essentially, to provide the best performance and safety, lithium-ion batteries are created to have a certain range of voltages. Manufacturers of lithium-ion battery-powered electronics must make sure that their products are made to operate within this voltage range.

To avoid harming the battery or device, users should take care not to overcharge or discharge their lithium-ion batteries outside of the recommended voltage range.

How Many Cycles Does a Lithium Have

Lithium-ion batteries have incredibly long-life cycles lasting for approximately 6,000 cycles. 80% of the capacity will still be available after those 6,000 cycles. To put that number into perspective, the battery would have been cycled every day for 16 years.

Now, you only reach those 6,000 cycles if you don't discharge below 10% and charge above 90%. To reach 6,000 cycles, a battery with a useful capacity of 100Ah must have 80Ah. You can obtain 4,000 cycles if you use the battery's entire capacity, which is still a lot.

Conclusion

As you can see the voltage plays a key role in determining and it shouldn’t ever be overlooked when you are considering purchasing a new lithium-ion battery.

You should always follow the correct battery care to ensure that it lost its full life cycle. Proper care will also prevent the risk of causing explosions within the battery.

It is also a good idea to compare your voltage charts with others such as the marine battery voltage chart, the battle born battery voltage chart, and the solar panel voltage chart if you are interested in connecting a solar panel to your battery.

You can always get in touch with Shop Solar Kits if you need further help. They can provide you with expert guidance on lithium batteries and which ones are compatible with solar panel systems. Before installation, make sure to become familiar with a solar panel voltage chart.

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