Lithium-Ion Battery Storage & Charging
Lithium-ion chemistry performs well at elevated temperatures but prolonged exposure to heat reduces battery life. High temperatures during charging may lead to battery degradation and charging at temperatures above 45 °C will degrade battery performance.
Charging temperature limits for Li-ion are stricter than the operating limits. Lithium-ion chemistry performs well at elevated temperatures but prolonged exposure to heat reduces battery life. Li‑ion batteries offer good charging performance at cooler temperatures and may even allow 'fast-charging' within a temperature range of 5 to 45 °C (41 to 113 °F). Charging should be performed within this temperature range. High temperatures during charging may lead to battery degradation and charging at temperatures above 45 °C will degrade battery performance. SECURALL Safety storage buildings can be customized with explosion proof HVAC systems to get the optimum desired temperature for battery storage and charging purposes.
Battery Energy Storage Systems (BESS’s)
The rapid rise of Battery Energy Storage Systems (BESS’s) that use Lithium-ion (Li-ion) battery technology brings with it massive potential – but also a significant range of risks. Lithium-ion batteries or rechargeable batteries may seem harmless, but they harbor safety risks that are often underestimated. With their very high energy density, they can, under certain conditions, ignite spontaneously or become unstable and explode when heated. If a technical defect occurs or the battery fails, this can have serious consequences for people, the company and the environment. To date, there are no legal guidelines for the storage and supply of lithium-ion batteries. It is therefore up to each company to decide which safety measures to take but, as lithium is a hazardous substance, a Risk Assessment should be conducted to support this and should ensure that charging areas are sufficiently remote from any hazardous materials such as flammable liquids and gases that may be stored or in use on the premises.
Lithium-Ion Battery Storage Key Features and Aspects of Lithium-Ion Batteries
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Storing lithium-ion batteries properly is essential to ensure their longevity, safety, and optimal performance. Whether the batteries are in use or in long-term storage, following some guidelines can help maintain their health. Here are key considerations for lithium-ion battery storage:
Charge Level:
Long-Term Storage: If you plan to store a lithium-ion battery for an extended period, it's generally recommended to store it with a charge level between 40% and 60%. This range helps prevent the battery from becoming overly discharged, which can lead to capacity loss.
Temperature:
Cool, Dry Environment: Store lithium-ion batteries in a cool, dry place. Extreme temperatures, both hot and cold, can affect the battery's performance. Ideally, the storage temperature should be between 20°C (68°F) and 25°C (77°F). Avoid exposing batteries to direct sunlight and keep them away from heaters or radiators.
Avoid Freezing: Avoid storing lithium-ion batteries in environments where they may freeze, as this can cause irreversible damage.
Avoid Full Discharge:
Prevent Over-Discharge: Lithium-ion batteries should not be fully discharged before storage. If a battery is discharged too much, it might enter a deep discharge state, which can result in capacity loss and other issues.
Check Charge Level Periodically:
Regular Checks: If batteries are in long-term storage, it's advisable to check their charge level periodically and recharge them to the recommended storage level if necessary.
Use Manufacturer's Recommendations:
Follow Guidelines: Always refer to the manufacturer's guidelines for specific recommendations on storing their lithium-ion batteries. Different devices and manufacturers may have slightly different guidelines.
Avoid Extreme Conditions:
Protect from Heat: High temperatures can accelerate the aging process of lithium-ion batteries. Avoid leaving batteries in hot cars or exposing them to prolonged periods of high temperatures.
Avoid Direct Sunlight: Direct sunlight can also increase the temperature of the battery and impact its performance.
Charge Before Use:
Pre-Charge Before Use: If a lithium-ion battery has been in storage for an extended period, it's advisable to charge it before using it. This helps ensure that the battery is in good condition and has an adequate charge.
Safety Considerations:
Inspect for Damage: Before storing a lithium-ion battery, check for any physical damage. If a battery is damaged, it should not be used or stored, as this can pose safety risks.
By following these guidelines, you can help maintain the health and performance of lithium-ion batteries during storage. Keep in mind that specific recommendations may vary depending on the type of device and battery, so consulting the manufacturer's guidelines is always a good practice.