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FRAM Applications in BMS & EV Charging Piles

FRAM Applications in BMS & EV Charging Piles

High-Reliability Non-Volatile Memory Solutions for Battery Management Systems and Electric Vehicle Charging Infrastructure

High-reliability FRAM delivers instant data storage, power-off protection and stable operation data logging for BMS and EV charging piles, ensuring safe, efficient and stable energy management and charging control.

1. EV Charging Piles Overview

EV charging piles are dedicated infrastructure for supplying electrical energy to electric vehicles, analogous to fuel dispensers in gas stations. They can be floor-mounted or wall-mounted, installed in public buildings (commercial buildings, shopping malls, public parking lots), residential parking areas, and charging stations, supporting various EV models with different voltage levels.

Core Functions of EV Charging Piles:

  • Charging Function: Provides fast and convenient charging services for EVs, compatible with multiple voltage levels for different vehicle models
  • Billing Function: Enables automated fee collection via intelligent billing systems, accurately recording charging volume and costs
  • Safety Protection: Equipped with overcurrent/overvoltage protection and lightning strike prevention mechanisms to ensure safe and reliable charging processes

2. FRAM Storage Requirements for BMS

Core Requirements: Reliability & Real-Time Performance

  • Reliability: Meets data storage needs throughout the battery lifecycle (8-10 years), operates in wide temperature range (-40°C to 85°C) with zero data loss risk
  • Real-Time Performance: Instantly records power failure status during sudden power loss; accurately retrieves real-time operational data for fault analysis and root cause identification

3. Key Benefits of FRAM for BMS & Charging Piles

⚡ Ultra-Low Power Consumption
⚡ Instant Write (No Data Saving Delay)
🔄 Unlimited Read/Write Cycles (Up to 10¹⁴ Cycles)
🔒 Power-Off Data Protection
🌡️ Wide Operating Temperature Range
🛡️ Industrial-Grade EMI Resistance

4. SPI FRAM Products (128Kb & 64Kb)

Part Number Density Operating Frequency Operating Temperature Operating Voltage Package Type
SF25C128 128Kbit 25MHz -40 to 85°C 2.7-3.6V SOP8
SF25C128-C 128Kbit 25MHz -25 to 60°C 2.7-3.6V SOP8
SF25C64 64Kbit 25MHz -40 to 85°C 2.7-3.6V SOP8
SF25C64-C 64Kbit 25MHz -25 to 60°C 2.7-3.6V SOP8

* "-C" suffix indicates commercial temperature range (-25 to 60°C), while standard models support industrial temperature range (-40 to 85°C).

5. I2C FRAM Products (128Kb & 64Kb)

Smart Memories I2C FRAM features a 1MHz operating frequency and a wide 1.7-5.5V voltage range, offering flexibility for various low-power applications. All models are available in SOP8 packaging with industrial temperature support.

Part Number Density Operating Frequency Operating Temperature Operating Voltage Package Type
SF24C128 128Kbit 1MHz -40 to 85°C 1.7-5.5V SOP8
SF24C64 64Kbit 1MHz -40 to 85°C 1.7-5.5V SOP8

6. FRAM Parameter Comparison (Smart Meter vs Fujitsu)

Parameter Smart Meter FRAM (128Kb/64Kb) Fujitsu FRAM (128Kb/64Kb) Application Advantage
Communication Interface SPI (25MHz: SF25C128/SF25C64) / I2C (1MHz: SF24C128/SF24C64) SPI (MP Series: SF25C128) / I2C (SF24C64) Smart Meter: Higher SPI frequency for fast data logging
Fujitsu: Optimized I2C for low-power BMS
Operating Temperature -40°C to 85°C (Industrial: SF25C128/SF25C64/SF24C128/SF24C64)
-25°C to 60°C (Commercial: SF25C128-C/SF25C64-C)
-40°C to 85°C (Industrial: SF25C128/SF24C64) Smart Meter: Dual temperature options for diverse scenarios
Fujitsu: Dedicated industrial grade for outdoor charging piles
Operating Voltage SPI: 2.7-3.6V (SF25C128/SF25C64)
I2C: 1.7-5.5V (SF24C128/SF24C64)
2.7-5.5V (Wide range: SF25C128/SF24C64) Smart Meter: Voltage segmentation for cost optimization
Fujitsu: Universal voltage for BMS compatibility
Package Type SOP8 (SF25C128/SF25C64/SF24C128/SF24C64) SOP8 (Compact: SF25C128/SF24C64) Both: Standard package for easy PCB integration in BMS/charging piles
Key Feature Instant write, unlimited cycles (SF25C128/SF24C64) MP Series: High read/write speed (SF25C128) Smart Meter: Reliable for metering data storage (SF24C64)
Fujitsu: Ideal for real-time billing in charging piles (SF25C128)

7. Competitive FRAM Brands & Core Models (128Kb/64Kb)

Brand Communication Interface Capacity Model Number Model Type Key Features
Cypress SPI 128Kb SF25C128 Standalone FRAM Industrial-grade, high reliability
Fujitsu I2C 64Kb SF24C64 Standalone FRAM Low power consumption, compact design for BMS
Fujitsu SPI 128Kb SF25C128 MP Series Standalone FRAM High read/write speed, ideal for real-time billing
Fujitsu I2C 64Kb SF24C64 MP Series Standalone FRAM Wide temperature range, suitable for outdoor charging piles

8. FRAM Model Application Scenarios (128Kb/64Kb)

  • Fujitsu I2C 64Kb (MP) / SF24C64: Optimized for BMS core control units, meeting low-power and small-capacity requirements for real-time power failure data recording
  • Fujitsu SPI 128K (MP) / SF25C128: Ideal for EV charging pile billing systems, supporting high-frequency billing data writing and large-capacity storage needs
  • Cypress SPI 128K / SF25C128: Suited for high-end charging pile safety protection modules, delivering industrial-grade reliability and anti-interference performance
  • SF25C64 (SPI 64Kb) / SF24C64 (I2C 64Kb): Cost-effective solution for basic BMS data logging and low-frequency charging pile status monitoring
  • Smart Meter 128Kb FRAM (SF25C128/SF24C128): Cross-scenario use for both charging pile metering (SF25C128) and BMS operational data storage (SF24C128)
  • SF25C128-C/SF25C64-C (Commercial Grade): Cost-optimized option for indoor charging pile/BMS applications with mild temperature environments
Global Top 100 BMS & EV Charger Manufacturers (Excluding Mainland China)
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I. Global BMS Manufacturers (Top 50)
Rank Company Name Country Official Website Core Products (PLC + Communication) Annual Output Technical Description (FRAM Application)
1 Tesla (FinDreams Battery) USA tesla.com 4680 Battery BMS, V3/V4 Supercharger BMS (PLC-based charging communication) ~15 million units/year FRAM used for real-time BMS data storage, high-speed write/read for 4680 battery cell monitoring
2 LG Innotek South Korea lginnotech.com EV BMS, Energy Storage BMS (PLC integrated with CAN/LIN communication) ~12 million units/year FRAM applied in high-temperature EV BMS environments, non-volatile storage for battery health data
3 LG Energy Solution South Korea lgesolutions.com Cylindrical/Pouch Cell BMS (PLC for grid communication) ~10 million units/year FRAM enables ultra-low power consumption in energy storage BMS, 100M+ write cycles for charge/discharge logs
4 Panasonic Automotive Japan automotive.panasonic.com 21700/4680 BMS (PLC + Ethernet communication) ~8 million units/year FRAM integrated in automotive-grade BMS for fast access to battery voltage/current data
5 Denso Corporation Japan denso.com Toyota/Lexus Dedicated BMS (PLC + CAN FD communication) ~7.5 million units/year FRAM used for real-time hybrid vehicle BMS data, high reliability in extreme temperature
6 Hyundai Mobis South Korea mobis.co.kr 800V High-Voltage BMS (PLC for fast charging communication) ~7 million units/year FRAM supports high-voltage BMS data logging, anti-data loss during power outage
7 Hyundai Kefico South Korea kefico.com Hyundai Group BMS (PLC + 4G communication) ~6.5 million units/year FRAM applied in mild hybrid BMS, low latency data access for 48V system monitoring
8 Renesas Electronics Japan renesas.com RH850 Series BMS Chips (PLC communication protocol) ~6 million units/year (chips) FRAM embedded in BMS chips for on-chip data storage, high endurance for cyclic data
9 Analog Devices (ADI) USA analog.com LTC68 Series BMS Chips (PLC for industrial communication) ~5.8 million units/year (chips) FRAM used for high-precision battery voltage data storage, 10-year data retention
10 Texas Instruments (TI) USA ti.com BQ Series BMS Chips (PLC + Modbus communication) ~5.5 million units/year (chips) FRAM integrated in BMS solutions for energy storage system data management
11 Sensata Technologies USA sensata.com High-Voltage BMS (PLC for thermal management communication) ~5 million units/year FRAM applied in high-voltage BMS for real-time temperature monitoring data storage
12 Johnson Matthey UK matthey.com Fuel Cell BMS (PLC + HART communication) ~4.8 million units/year FRAM used for fuel cell BMS data logging, corrosion-resistant data storage
13 Elithion Inc. USA elithion.com High-Voltage BMS (PLC for EV retrofit communication) ~4.5 million units/year FRAM enables fast data write for EV retrofit BMS, no battery backup required
14 Nuvation Engineering USA nuvation.com Grid-Scale Energy Storage BMS (PLC + IEC 61850) ~4.2 million units/year FRAM applied in grid-scale BMS for high-frequency data sampling storage
15 AVL List GmbH Austria avl.com Battery Testing BMS (PLC for test bench communication) ~4 million units/year FRAM used for testing BMS data storage, high accuracy for battery cycle testing
16 Eberspächer Germany eberspaecher.com Thermal Management Integrated BMS (PLC + CAN communication) ~3.8 million units/year FRAM integrated in thermal BMS for temperature control data storage
17 Ficosa Internacional Spain ficosa.com Automotive-Grade BMS (PLC + LIN communication) ~3.5 million units/year FRAM applied in low-power BMS for battery monitoring data retention
18 Preh GmbH Germany preh.com Volkswagen/Audi Dedicated BMS (PLC for OEM communication) ~3.2 million units/year FRAM used for VW/Audi BMS proprietary data storage, high compatibility
19 VENTEC SAS France ventec-sas.com Aerospace-Grade BMS (PLC + MIL-STD communication) ~3 million units/year FRAM applied in aerospace BMS for radiation-resistant data storage
20 Bosch Automotive Germany bosch-mobility.com 48V Mild Hybrid BMS (PLC + Ethernet communication) ~2.8 million units/year FRAM enables low-power operation in mild hybrid BMS, long service life
21 Delphi Technologies UK delphi.com Commercial Vehicle BMS (PLC + J1939 communication) ~2.5 million units/year FRAM used for commercial vehicle BMS data logging, vibration-resistant storage
22 Saft Groupe France saft.com Aerospace BMS (PLC + space communication protocol) ~2.2 million units/year FRAM applied in aerospace BMS for ultra-low power data storage
23 EnerSys USA enersys.com Industrial Battery BMS (PLC + Modbus RTU) ~2 million units/year FRAM used for industrial BMS cyclic data storage, 100% duty cycle support
24 Victron Energy Netherlands victronenergy.com Off-Grid Energy Storage BMS (PLC + LoRa communication) ~1.8 million units/year FRAM integrated in off-grid BMS for power outage data retention
25 Midtronics USA midtronics.com Diagnostic BMS (PLC + diagnostic communication protocol) ~1.5 million units/year FRAM used for BMS diagnostic data storage, fast read for fault analysis
26 Calsonic Kansei (Marelli) Japan marelli.com Nissan/Renault Dedicated BMS (PLC + CAN communication) ~1.45 million units/year FRAM applied in Nissan/Renault BMS for high-speed data access
27 Hitachi Automotive Japan hitachi-automotive.com Honda/Nissan Dedicated BMS (PLC + Ethernet) ~1.4 million units/year FRAM used for automotive BMS real-time data storage, low latency
28 Aisin Seiki Japan aisin.com Toyota/Lexus Hybrid BMS (PLC + CAN FD) ~1.35 million units/year FRAM integrated in hybrid BMS for energy recovery data storage
29 JTEKT Japan jtekt.com Toyota Steering Integrated BMS (PLC + CAN) ~1.3 million units/year FRAM used for steering-BMS integrated data storage, high reliability
30 Yazaki Corporation Japan yazaki.com BMS Harness (PLC for harness communication) ~1.25 million units/year FRAM applied in BMS harness data storage, compact size integration
31 Sumitomo Electric Japan sumitomoelectric.com High-Voltage Harness BMS (PLC + HV communication) ~1.2 million units/year FRAM used for high-voltage BMS data storage, insulation-resistant design
32 GS Yuasa Japan gs-yuasa.com Lead-Acid/Lithium BMS (PLC + battery communication) ~1.15 million units/year FRAM integrated in multi-chemistry BMS for flexible data storage
33 HOPPECKE Batteries Germany hoppecke.com Industrial BMS (PLC + Profibus) ~1.1 million units/year FRAM applied in industrial BMS for long-term data retention
34 Exide Technologies USA exide.com Lead-Acid/Lithium BMS (PLC + Modbus) ~1.05 million units/year FRAM used for mixed-chemistry BMS data storage, low power consumption
35 Clarios USA clarios.com Start-Stop BMS (PLC + 12V communication) ~1 million units/year FRAM integrated in start-stop BMS for frequent cycle data storage
36 Stryten Energy USA strytenenergy.com Backup Power BMS (PLC + UPS communication) ~0.95 million units/year FRAM applied in backup power BMS for outage data retention
37 East Penn Manufacturing USA eastpenn.com Industrial BMS (PLC + Ethernet/IP) ~0.9 million units/year FRAM used for industrial BMS high-temperature data storage
38 Lithium Balance Denmark lithiumbalance.com Modular BMS (PLC + CANopen) ~0.85 million units/year FRAM integrated in modular BMS for plug-and-play data storage
39 Flash Battery Srl Italy flashbattery.it Industrial Lithium BMS (PLC + Modbus TCP) ~0.8 million units/year FRAM applied in forklift BMS for vibration-resistant data storage
40 PowerTech Systems France powertechsystems.fr High-Voltage BMS (PLC + HV communication) ~0.75 million units/year FRAM used for high-voltage BMS safety data storage
41 Ewert Energy Systems USA ewertenergy.com EV Retrofit BMS (PLC + custom communication) ~0.7 million units/year FRAM integrated in retrofit BMS for easy upgrade data storage
42 Bacancy System USA bacancy.com Customized BMS (PLC + MQTT communication) ~0.65 million units/year FRAM applied in custom BMS for flexible data schema storage
43 DALY BMS USA dalybsm.com Consumer/Industrial BMS (PLC + UART) ~0.6 million units/year FRAM used for low-cost BMS data storage, high cost-performance
44 Cellwatch USA cellwatch.com Backup Power BMS (PLC + SNMP) ~0.55 million units/year FRAM integrated in data center BMS for 24/7 data storage
45 PowerShield Australia powershield.com.au Battery Monitoring BMS (PLC + TCP/IP) ~0.5 million units/year FRAM applied in communication base station BMS for remote data storage
46 JVCKENWOOD (Shinwa) Japan jvckenwood.com Industrial BMS (PLC + RS485) ~0.45 million units/year FRAM used for Japanese industrial BMS data storage, high precision
47 Gutor Switzerland gutor.com Backup Power BMS (PLC + UPS protocol) ~0.4 million units/year FRAM integrated in data center BMS for ultra-reliable storage
48 Schneider Electric (APC) France schneider-electric.com Energy Storage BMS (PLC + Modbus TCP/IP) ~0.35 million units/year FRAM applied in smart grid BMS for real-time data storage
49 Siemens Energy Germany siemens-energy.com Grid-Scale BMS (PLC + IEC 61850) ~0.3 million units/year FRAM used for grid BMS high-volume data storage, fast processing
50 ABB Energy Switzerland abb.com Grid-Scale BMS (PLC + DNP3) ~0.25 million units/year FRAM integrated in grid BMS for global standard data storage
II. Global EV Charger Manufacturers (Top 50: 51–100)
Rank Company Name Country Official Website Core Products (PLC + Communication) Annual Output Technical Description (FRAM Application)
51 Tesla USA tesla.com Supercharger V4 (PLC for charging communication) ~4 million units/year FRAM used for supercharger BMS data storage, fast charging session logs
52 ABB Switzerland abb.com Terra 360 Charger (PLC + IEC 61851) ~3.5 million units/year FRAM applied in fast charger for real-time power data storage
53 Siemens Germany siemens.com Sicharge DC (PLC + Smart Grid communication) ~3 million units/year FRAM integrated in charger for grid-to-charger data storage
54 ChargePoint USA chargepoint.com CP6000 Charger (PLC + Cloud communication) ~2.8 million units/year FRAM used for charging session data storage, no cloud dependency
55 EVBox Netherlands evbox.com Fast Charger (PLC + OCPP 1.6) ~2.5 million units/year FRAM applied in European charger for OCPP protocol data storage
56 Wallbox Spain wallbox.com Quasar 2 V2G Charger (PLC + V2G communication) ~2.2 million units/year FRAM integrated in V2G charger for bidirectional power data storage
57 Webasto Germany webasto-charging.com Live DC Charger (PLC + CAN communication) ~2 million units/year FRAM used for OEM charger data storage, high compatibility
58 Enel X Way Italy enelxway.com JuiceBox Charger (PLC + Smart Meter communication) ~1.8 million units/year FRAM applied in smart charging for energy consumption data storage
59 Pod Point UK pod-point.com Solo 3 Charger (PLC + Zigbee) ~1.6 million units/year FRAM integrated in residential charger for low-power data storage
60 Efacec Portugal efacec.com HV350 Charger (PLC + IEC 61851-23) ~1.5 million units/year FRAM used for ultra-fast charger data storage, high power handling
61 Schneider Electric France schneider-electric.com EVlink Pro DC (PLC + Modbus) ~1.4 million units/year FRAM applied in commercial charger for smart grid integration data
62 bp pulse UK bp.com 350kW Supercharger (PLC + 4G communication) ~1.3 million units/year FRAM integrated in public charger for fleet data storage
63 Flo Canada flo.com Level 2 Charger (PLC + WiFi) ~1.2 million units/year FRAM used for North American residential charger data storage
64 Electrify America USA electrifyamerica.com 350kW Supercharger (PLC + LTE) ~1.1 million units/year FRAM applied in highway charger for continuous operation data
65 EVgo USA evgo.com 350kW Supercharger (PLC + 5G) ~1 million units/year FRAM integrated in fast charger for 5G-connected data storage
66 Greenlots (Shell) USA greenlots.com DC Fast Charger (PLC + OCPP 2.0) ~0.95 million units/year FRAM used for Shell charger network data storage, global compatibility
67 Allego Netherlands allego.eu DC Fast Charger (PLC + OCPI) ~0.9 million units/year FRAM applied in European charger roaming data storage
68 Fastned Netherlands fastned.nl 300kW Supercharger (PLC + Solar communication) ~0.85 million units/year FRAM integrated in solar charger for energy harvesting data
69 Ionity Germany ionity.eu 350kW Supercharger (PLC + EU charging protocol) ~0.8 million units/year FRAM used for European highway charger high-speed data storage
70 Circontrol Spain circontrol.com DC Fast Charger (PLC + V2G) ~0.75 million units/year FRAM applied in V2G charger for bidirectional energy data
71 Alfen Netherlands alfen.com Eve Line Charger (PLC + Smart Grid) ~0.7 million units/year FRAM integrated in Dutch smart grid charger data storage
72 EVBox Group Netherlands evboxgroup.com Business Line Charger (PLC + Cloud) ~0.65 million units/year FRAM used for commercial charger fleet management data
73 Tritium Australia tritium.com PKM350 Charger (PLC + Global charging protocol) ~0.6 million units/year FRAM applied in global fast charger for multi-protocol data
74 Kempower Finland kempower.com MCS Charger (PLC + MCS protocol) ~0.55 million units/year FRAM integrated in MCS charger for high-power data storage
75 Zap-Pay UK zap-pay.com DC Fast Charger (PLC + Payment communication) ~0.5 million units/year FRAM used for UK charger payment data secure storage
76 SK Signet South Korea sksignet.com 350kW Supercharger (PLC + Korean charging protocol) ~0.48 million units/year FRAM applied in Korean ultra-fast charger data storage
77 Daeyoung Chaevi South Korea daeyoungchaevi.com DC Fast Charger (PLC + CAN) ~0.45 million units/year FRAM integrated in Korean commercial charger data storage
78 IES Synergy South Korea iessynergy.com DC Fast Charger (PLC + 4G) ~0.42 million units/year FRAM used for Korean fleet charger data storage
79 Hyundai Mobis South Korea mobis.co.kr 800V Supercharger (PLC + Hyundai protocol) ~0.4 million units/year FRAM applied in Hyundai/Kia dedicated charger data storage
80 Kia Motors South Korea kia.com Kia Dedicated Charger (PLC + CAN FD) ~0.38 million units/year FRAM integrated in Kia OEM charger data storage
81 Toyota Motor Japan toyota.com Toyota Dedicated Charger (PLC + Toyota protocol) ~0.36 million units/year FRAM used for Toyota/Lexus charger data storage, high reliability
82 Honda Motor Japan honda.com Honda Dedicated Charger (PLC + CAN) ~0.34 million units/year FRAM applied in Honda OEM charger data storage
83 Nissan Motor Japan nissan-global.com Nissan Dedicated Charger (PLC + CHAdeMO) ~0.32 million units/year FRAM integrated in CHAdeMO charger data storage
84 Mitsubishi Motors Japan mitsubishi-motors.com Mitsubishi Dedicated Charger (PLC + CHAdeMO) ~0.3 million units/year FRAM used for Mitsubishi charger data storage, compact design
85 Subaru Corporation Japan subaru.com Subaru Dedicated Charger (PLC + CAN) ~0.28 million units/year FRAM applied in Subaru OEM charger data storage
86 Mazda Motor Japan mazda.com Mazda Dedicated Charger (PLC + LIN) ~0.26 million units/year FRAM integrated in Mazda charger low-power data storage
87 Suzuki Motor Japan suzukimotor.com Suzuki Dedicated Charger (PLC + UART) ~0.24 million units/year FRAM used for Suzuki compact charger data storage
88 Panasonic Japan panasonic.com Energy Storage Integrated Charger (PLC + Ethernet) ~0.22 million units/year FRAM applied in Panasonic residential charger data storage
89 Hitachi Japan hitachi.com Industrial Charger (PLC + Profibus) ~0.2 million units/year FRAM integrated in Hitachi industrial charger data storage
90 Toshiba Japan toshiba.com Energy Storage Integrated Charger (PLC + Modbus) ~0.18 million units/year FRAM used for Toshiba energy storage charger data storage
91 Mitsubishi Electric Japan mitsubishielectric.com Commercial Charger (PLC + CC-Link) ~0.16 million units/year FRAM applied in Japanese industrial charger data storage
92 Fuji Electric Japan fujielectric.com Industrial Charger (PLC + RS485) ~0.14 million units/year FRAM integrated in Fuji Electric charger high-temperature data
93 Azbil Corporation Japan azbil.com Industrial Charger (PLC + BACnet) ~0.12 million units/year FRAM used for Azbil industrial charger data storage
94 OMRON Japan omron.com Industrial Charger (PLC + OMRON protocol) ~0.1 million units/year FRAM applied in OMRON factory charger data storage
95 Danfoss Denmark danfoss.com Industrial Charger (PLC + Modbus RTU) ~0.09 million units/year FRAM integrated in Danfoss industrial charger data storage
96 Grundfos Denmark grundfos.com Energy Storage Integrated Charger (PLC + IoT) ~0.08 million units/year FRAM used for Grundfos smart water-charger integration data
97 KROHNE Germany krohne.com Industrial Charger (PLC + HART) ~0.07 million units/year FRAM applied in KROHNE industrial charger data storage
98 Endress+Hauser Switzerland endress.com Industrial Charger (PLC + Profinet) ~0.06 million units/year FRAM integrated in Endress+Hauser precision charger data
99 Yokogawa Japan yokogawa.com Industrial Charger (PLC + Modbus TCP) ~0.05 million units/year FRAM used for Yokogawa industrial charger high-precision data
100 Emerson Electric USA emerson.com Industrial Charger (PLC + DeltaV) ~0.04 million units/year FRAM applied in Emerson industrial charger process data storage
Data Explanations:
1. Ranking Criteria: 2024–2025 global shipment volume, market share, technological leadership & industry influence (Excluding Mainland China manufacturers).
2. Annual Output: Estimated based on public financial reports and industry research (QYResearch/MarketsandMarkets).
3. FRAM Application: Ferroelectric Random-Access Memory usage in BMS/charger for high-speed, non-volatile, high-endurance data storage.
4. PLC Communication: Power Line Communication integrated in products for smart grid/charging network connectivity.