FeRAM application in BESS

November 14, 2025

Unbeatable safety measure：
Immediate recovery from pre-incident state

FeRAM’s high-speed writing and exceptional rewrite endurance allows it to play a critical role in the Power Conversion System and the Battery Management System of Battery Energy Storage Systems, also called BESS. It enables rapid recovery from power disruptions and simplifies root cause analysis, reducing system downtime, making RAMXEED’s FeRAM a great fit for BESS.

BESS (Battery Energy Storage System) overview

Mechanism of BESS

A utility-scale Battery Energy Storage System stores electrical energy in rechargeable batteries and releases it back to the power grid when needed. This process ensures reliable electricity supply and supports critical grid services such as frequency regulation and peak load management.
Without energy storage, electricity must be generated and consumed simultaneously, which limits flexibility. BESS technology enables strategic energy storage and discharge at the most critical times and locations, improving grid stability, integrating renewable energy sources, and reducing operational costs. BESS and its components play a big part in increasing Sustainability.

BESS

BESS can store energy from both renewable and non-renewable sources. Stand-alone batteries are charged from the power grid and are not physically co-located with solar power plants. These independent systems provide services at critical transmission and distribution levels in response to the overall state of the power system.

BMS

The Battery Management System acts as the central intelligence of a battery rack. Its primary role is to continuously monitor key parameters such as voltage, current, temperature, and state of charge for each battery module. By doing so, it ensures optimal performance and prevents conditions that could lead to overheating, overcharging, or deep discharge, all of which can damage the battery or pose safety risks. Additionally, the BMS manages cell balancing, communicates with higher-level controllers, and provides diagnostic data for predictive maintenance. In short, it safeguards the battery system while maximizing efficiency and lifespan, leading to a more sustainable path.

Main Components of a BESS

A BESS consists of a Power Conversion System, battery modules with built-in BMS, battery racks, and battery enclosures.

How does FeRAM function within PCS and BMS?

BMS must continuously record, in real time (every 0.1 to 1 second), the temperature, voltage, current, charge/discharge status, and historical data of battery cells to ensure all cells remain balanced.

The PCS must continuously record real-time log information such as current, voltage, frequency, and faults, every 2 seconds for 24 hours, including the critical two seconds before a fault occurs. This facilitates troubleshooting and debugging during power system failures, enabling rapid restoration of operation and maintaining these parameters at normal levels.

FeRAM, with its high-speed write capability and exceptional durability, is considered the most ideal memory for BESS.

Specific Functions of FeRAM in PCS

FeRAM enables system restart by accurately monitoring what happened immediately before any incident or failure.

Lifespan of different memory types when data logging is required every 100 milliseconds

Since FeRAM guarantees over one trillion rewrite cycles, even with data logging every 100 milliseconds, it is calculated to withstand rewriting for more than 100 years.

Memory type	Part number	Lifespan
FeRAM	MB85RS1MT	Over 100 years
EEPROM	M95M01	27 hours
NOR FLASH	W20Q10RL	2.7 hours

Advantages of FeRAM use in BESS

The benefits of using FeRAM in BESS are as follows:

System restart from the immediate state before failure even in the case of unexpected power failure occurrence.
Easier troubleshooting, and system minimized downtime allowed by the FeRAM recorded data prior failure.
Possible implementation of a more compact PCB design without supercapacitors compared with EEPROM and flash memory which require longer write times, and to compensate for this during power interruptions, large supercapacitors.
Sustainability Increase related to FeRAM’s ultra-low consumption.