Outdoor energy storage battery discharge

What is a battery energy storage system?

Battery Energy Storage Systems (BESS) have become a cornerstone of modern energy infrastructure. They enable the seamless integration of renewable energy sources, enhance grid stability, and provide reliable backup power.

What is the depth of discharge of a battery?

One of the most critical parameters during discharging is the depth of discharge (DOD). DOD refers to the percentage of the battery’s capacity that has been used. For instance, if a battery is discharged to 40% of its capacity, the DOD is 60%. Exceeding the manufacturer-recommended DOD can significantly reduce the battery’s lifespan and efficiency.

Why is load management important when discharging a battery?

Load management is equally important during discharging. If the connected load demands more power than the battery can safely supply, it can strain the system, leading to overheating or damage. Operators should ensure that the load remains within the battery’s rated output capacity.

What happened at Gateway energy storage facility?

On May 15, 2024, Gateway Energy Storage Facility in San Diego, California, experienced a BESS fire with continued flare-ups for seven days following the fire. The facility held about 15,000 nickel manganese cobalt lithium-ion batteries.

What happens if you overcharge a battery?

Overcharging a battery, or charging it beyond its recommended SOC limit, can lead to reduced efficiency, shorter lifespan, and safety risks. Most modern BESS are equipped with Battery Management Systems (BMS) that automatically manage SOC levels, but operators should still remain vigilant.

Are lithium battery fires a safety concern?

While BESS technology is designed to bolster grid reliability, lithium battery fires at some installations have raised legitimate safety concerns in many communities. BESS incidents can present unique challenges for host communities and first responders: