Energy storage lithium battery output control switch

Are lithium-ion battery energy storage systems sustainable?

Presently, as the world advances rapidly towards achieving net-zero emissions, lithium-ion battery (LIB) energy storage systems (ESS) have emerged as a critical component in the transition away from fossil fuel-based energy generation, offering immense potential in achieving a sustainable environment.

Why is active balancing a lithium ion battery important?

In the case of a Lithium-Ion battery, it is well known that the life cycle can become shorter and that it can cause a fire [5, 6]. Therefore, active balancing methods are preferred because they can transfer power from a cell with a higher charge to a cell with a lower charge to save the energy and to protect the batteries.

What reduces the effective capacity of lithium-ion battery (LIB) pack?

The effective capacity of lithium-ion battery (LIB) pack is reduced by the inconsistency of individual LIB cell in terms of capacity, voltage and internal resistances.

Why is auxiliary lead-acid battery used for balancing energy during discharge period?

The use of auxiliary lead-acid battery for providing balancing energy during discharge period reduced the number of active components, power switches, control complexity, speed and life of LIB pack as P2C balancing is eliminated.

How does a lithium battery charge/discharge controller work?

The initial SOC value of each cell, considered for the discharging test is more than 50% thus the charge/discharge controller switched to discharging mode and started discharging the LIB pack with a constant discharging current of 4A. When the SOC of any battery cell first reaches 20%, the discharge controller stops discharging the LIB pack.

Can lithium-ion batteries improve balancing efficiency?

In order to show the improved performance of the proposed method, a prototype circuit was built with a battery module having twelve Lithium-Ion (Li-Ion) batteries. Experimental results are presented to verify the shorter balancing time and higher efficiency of the proposed method when compared with conventional methods.