How to Store Lithium-Ion Batteries Safely in the Workplace

Li-Ion Battery Positioning and Placement During Storage

Secure the batteries: Store batteries such that they are not at risk of being dropped, falling, crushed, or punctured. Physical damage can lead to internal short circuits causing battery failure.

Energyland supply professional and honest service.

Store batteries upright: Storing batteries upright helps:

• Prevent leaks of the flammable electrolyte in case they are not sealed properly.
• Ensure batteries equipped with venting systems work properly avoiding internal pressure buildup.
• Avoid physical damage from falls or tipping over.
• Maintain uniform distribution of electrolytes which improves service life and performance.
• Prevent internal components from shifting which can cause short circuits and battery failure.

Protect batteries from loose metal objects: Keep batteries away from loose metal objects, such as screws, nails, tools, etc. to prevent short circuits.

Maintain separation from other batteries/objects: Batteries and battery packs should never be stacked on top of each other or have items placed on top of them. Rather, batteries should be stored in a single layer or in properly designed racks that prevent them from touching or applying pressure to each other. Doing so helps avoid risks such as:

• Physical damage which can cause internal short circuits and/or leaking electrolyte.
• Battery terminals contacting each other potentially creating a short circuit and rapid discharge which generates heat and can catch fire.
• Interference with heat dissipation, particularly during charging.
• Stability problems because improperly stacked batteries are far more likely to fall or tip over.

Long-Term Battery Storage

When storing li ion batteries for periods of one month or longer, there are a few additional precautions to take that improve the batteries&#; service life and performance as well as safety.

For more stackable lithium batteryinformation, please contact us. We will provide professional answers.

During long-term storage, batteries should never be continuously charging, nor should they be fully charged or fully discharged. The rationale for each is as follows:

• Continuously charging: Battery failure is most likely to occur during charging. Continuously charging over long periods of time greatly increases the risk. Additionally, continuous charging stresses the battery and can greatly shorten its service life.
• Fully charged: A fully charged state creates more internal stress on the battery. This can accelerate degradation of internal components and increase the risk of swelling and/or leakage. Either of these will degrade battery performance and service life and can create a safety hazard.
• Fully discharged: Li ion batteries have protection features built in that depend on a minimum voltage threshold to function properly. Storing a fully discharged battery for extended periods can cause irreversible damage which can render the battery inoperable. It can also cause conditions allowing the creation of copper filaments inside the lithium-ion cell which can lead to short circuits and battery failure.

Most battery manufacturers recommend storing batteries with a 30% to 50% state of charge (SOC) for optimal performance and service life. Interestingly, the amendments to  International Fire Code (IFC) regarding li ion battery storage grant waivers to their storage requirements when li ion batteries are stored with an SOC that does not exceed 30%. Batteries with 30% or less charge are considered less hazardous for storage purposes and have less chance of catastrophic failure.

Along with storing li ion batteries at the proper SOC, they should also be regularly monitored and inspected while in storage. The charge level of the batteries should be checked every few months. If the battery experiences self-discharge below 30%, the battery should be recharged back to not more than 30% SOC to maintain battery health.

The batteries should also be visually inspected for any signs of damage or swelling. Damaged or swollen batteries are a safety risk and should be removed and properly disposed of or recycled.

Short-Term Battery Storage

Short-term storage is considered to be a few days up to one month. While conditions such as the level of charge are not as critical, it is still recommended to store them at an SOC not greater than 30%. As with long-term storage, batteries should never be continuously charging while in the short-term.

The keys to solderless is

firmly clamping the cells to keep them fixed in place

both laterally against each other and/or the housing walls

also maintaining the pressure and low-resistance conductivity of the end connection points

in the face of extreme shock/vibration

the plastic wrap not being reliable enough to prevent shorting through the wear points.

The fact that the walls of the whole cylinder is a negative terminal is a big obstacle.

But these are not insoluble engineering problems, as the market grows effective and cheap solutions will emerge to replace the current welding standard.

We're just not there yet.

Amateurs muddling through their own solution might just help lead the way, but for us these are not trivial issues.

Material science has not yet given us a robust permanently flexible but highly conductive substance yet afaik, so a specialist spring design would be another approach.

The company is the world’s best Rack Lithium Battery supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.