What is the difference between energy retention rate and energy recovery rate?

Energy retention rate measures a battery’s ability to hold onto its charge during storage, while energy recovery rate measures its ability to regain its capacity after being stored for a certain period. Why are testing standards like IEC62133 and UN38.3 important for energy storage cells?

What is the energy retention rate of a battery?

The energy recovery rate is the percentage of a battery’s usable charge and discharge energy after it’s been stored compared to its energy when new. While stored, batteries lose energy to self-discharge, which comes in two types: reversible and irreversible. So, the energy retention rate doesn’t fully show a battery’s value. a.

What is energy retention rate?

Energy retention rate shows how well batteries keep their charge without use. When batteries sit idle in storage, they must hold charge well. This rate compares a battery’s energy after charging and discharging to its original energy. It’s given as a percent. Batteries are usually tested fully charged.

What happens if a battery reaches 80% capacity retention?

Assuming the battery voltage at 80% capacity retention remains the same as an as-assembled battery at a fully charged state, the energy remaining in the battery at the discharged state will be <∼20% (if there is no voltage drop).

Should energy retention rate be lower than a specific value?

Generally, the energy retention rate should not be lower than a specific value to ensure a long service life of the battery. The energy recovery rate is the percentage of a battery’s usable charge and discharge energy after it’s been stored compared to its energy when new.

Do batteries lose energy when stored?

While stored, batteries lose energy to self-discharge, which comes in two types: reversible and irreversible. So, the energy retention rate doesn’t fully show a battery’s value. a. Room temperature (25°C) storage for 28 days, charge and discharge energy recovery rate should not be less than 97%. b.