What Temperature Should Lithium-Ion Batteries Be Stored At?

Lithium-ion batteries are widely used in mobile devices, electric vehicles, and other applications due to their high energy density and long cycle life. However, improper storage temperatures can significantly affect their performance and safety. In this article, we’ll discuss the optimal temperature range for storing lithium-ion batteries and how to ensure they remain safe and functional.

What Temperature is Bad for Lithium Batteries?

Lithium-ion batteries are sensitive to high temperatures, which can accelerate their degradation and reduce their lifespan. The ideal temperature range for storing lithium-ion batteries is between 20°C and 25°C (68°F and 77°F). Exposing them to temperatures above 60°C (140°F) can cause irreversible damage to the battery, leading to a shortened lifespan, reduced capacity, and even a risk of fire or explosion.

On the other hand, storing lithium-ion batteries at temperatures below 0°C (32°F) can also damage the battery, as the electrolyte can freeze and expand, causing the battery to crack and leak. Therefore, it’s essential to always store lithium-ion batteries in a dry, cool place, away from direct sunlight and heat sources.

What is the Best Way to Store a Lithium-Ion Battery?

To ensure the longevity and safety of your lithium-ion batteries, it’s crucial to follow some best practices when storing them. Here are some tips:

  • Store lithium-ion batteries in a cool, dry place, away from direct sunlight and heat sources.
  • Keep them at a partial state of charge (between 40% and 60%) to reduce stress on the battery.
  • If not using the battery for an extended period, charge it to 50% before storage.
  • Use a storage container or bag designed for lithium-ion batteries to protect them from damage and prevent accidental short-circuits.
  • Check the battery’s voltage periodically and charge it if it drops below a certain level (usually 3.6V per cell).

How to Store Lithium-Ion Batteries Over Winter

If you live in a region with cold winters, you’ll need to take extra precautions when storing lithium-ion batteries. Here are some additional tips:

  • Store batteries indoors, where the temperature remains above freezing.
  • If you must store batteries in a garage or shed, put them in an insulated container to protect them from freezing temperatures.
  • Keep batteries away from windows and doors, where the temperature can fluctuate rapidly.
  • If you need to charge a battery in cold weather, warm it up first to prevent damage to the battery.

How Does Temperature Affect the Safety of Lithium-Ion Batteries?

Temperature plays a significant role in the safety of lithium-ion batteries. When exposed to high temperatures, the battery’s internal components can break down, leading to a thermal runaway reaction that can cause the battery to catch fire or explode. Therefore, it’s essential to follow the recommended storage temperature range and avoid exposing lithium-ion batteries to extreme temperatures.

In conclusion, storing lithium-ion batteries at the right temperature is critical for their longevity and safety. By following the best practices outlined in this article, you can ensure your batteries remain functional and protected from damage.

About the author, Phil Borges

Phil Borges is a battery aficionado. He's written extensively about batteries, and he loves nothing more than discussing the latest innovations in the industry. He has a deep understanding of how batteries work, and he's always on the lookout for new ways to improve their performance.