If you do not need a battery-operated electrical device for a longer period of time, you should store the lithium-ion Battery Systems in such a way that it cannot be damaged. In this blog post on the subject of "Storing lithium-ion batteries", we will explain to you exactly what you pay attention to, what you do and what you should avoid.
How to properly store lithium-ion batteries
Today, devices with a rechargeable lithium-ion technology are more the rule than the exception. Modern lithium-ion technology offers great advantages, for example in terms of a long service life, low self-discharge and high energy density. However, if you need to store a lithium-ion battery for a long time, there are a few things to keep in mind. In the following we would like to introduce you to some important rules for the correct storage of the batteries:
1. Make sure that the charge level is optimal
In order to store a lithium-ion Battery Systems, you should neither charge it completely nor discharge it too much. The optimal charge level is around 40-50 percent of the capacity and, in the best case, can be set on the charger. We therefore always recommend a charger that shows the charge level so that you can interrupt the charging process when the battery is about half charged. If your charger does not offer the possibility of a direct charge level control, you can temporarily fully charge the battery first and then insert it into the electrical device. There is often a display about the charge level so that you can first specifically discharge the power storage in the device before you then store the lithium-ion battery.
2. Always store the lithium-ion battery outside the device
Since a small amount of current can flow even when the electrical device is switched off - this applies to a cordless screwdriver as well as an e-bike - you should always remove the battery from the device and store it separately . This prevents the lithium-ion battery in the device from gradually being discharged when it is not in use and prevents deep discharge, which in the worst case can destroy the battery. By the way, because of a possible permanent discharge, you should not store the lithium-ion Battery Systems in the charger , but rather separately, because the charger can also draw power from the battery and thus continue to discharge it.
3. Provide optimal storage conditions
Not only is it critical that you remove the lithium-ion battery from the device for storage, you should also store the battery in a safe place. A storage location with stable temperatures is optimal , whereby a cooler environment with a temperature of no more than 10-15 ° C extends the life of the battery cells. At even lower temperatures, there is a risk that the battery will be damaged by the cold, so you should choose a location that does not cool down too much, even in deep winter. In addition, the environment must be permanently dryas moisture can penetrate the lithium-ion Battery Systems and cause short circuits. You should also avoid direct sunlight, so an ideal storage location is a garage, a dry cellar or an insulated shed .
4. Defective batteries must be disposed of, not stored
If you have the impression that the lithium-ion battery is no longer working properly, you should react quickly and correctly: Defective Battery Systems must be properly disposed of or repairedand as soon as possible. Because a defective battery is a potential hazard and in the worst case can explode or burn. For example, as soon as you see a bulge or expansion on the battery cover, cracks or other signs of changes inside the battery, you should remove the battery from the device immediately and take it to a collection point.
If you have any further questions on the subject of "storing lithium-ion batteries" or if you are not sure whether an older battery should be repaired rather than completely replaced, please contact us by phone or e-mailwith us. We have been dealing professionally with battery and accumulator technology since 1981 and are happy to assist you with our expertise and experience.