Energy storage battery life and depth of discharge

How does deep discharge affect battery life?

Depth of Discharge (DOD) A battery’s lifetime is highly dependent on the DOD. The DOD indicates the percentage of the battery that has been discharged relative to the battery’s overall capacity. Deep discharge reduces the battery’s cycle life, as shown in Fig. 1. Also, overcharging can cause unstable conditions.

How deep should a home battery be discharged?

This is why many home batteries come with a critical specification: Depth of Discharge, or how far down you can safely drain the battery without potentially causing a problem. Many batteries today feature depths of discharge, or DODs, of 100%, meaning it’s OK to use the battery’s entire energy capacity — but not all do.

What is the difference between depth of discharge and cycle life?

Depth of Discharge (DoD) and cycle life are two different aspects related to the performance and lifespan of a battery. DoD refers to how much energy has been used from the battery each time it’s discharged. It tells us how empty or full the battery is after being used.

How deep should a lithium ion battery be discharged?

Lithium-ion (Li-ion) battery depth of discharge For lithium-ion (Li-ion) batteries, it is generally recommended to avoid deep discharges below 20% to prolong their lifespan. This means you shouldn’t drain them more than 80% before recharging. 2. Lead-acid battery depth of discharge

What does depth of discharge mean on a battery?

Commonly abbreviated as DoD, depth of discharge represents the percentage of a battery's total capacity that has been discharged or used during a particular cycle. Think of it as a fuel gauge for your battery – it tells you how much of your battery's energy reserves you've tapped into.

How does depth of discharge affect the life of a lithium ion battery?

The depth of discharge (DoD) significantly impacts the cycle life of a lithium-ion battery by affecting how many charge-discharge cycles the battery can undergo before its capacity degrades to unusable levels.