Introduction: Why Elec & Eltek BMS Transformers Matter
Battery Management Systems (BMS) are critical in modern automotive applications, particularly in electric vehicles (EVs) and hybrid electric vehicles (HEVs). These systems ensure efficient energy management, maintain battery longevity, and enhance overall safety. Given the high number of cells in an EV battery pack, daisy chain connections are commonly used, requiring robust isolation and communication solutions.
The Elec & Eltek BMS Transformer line-up offers high-voltage isolation, serial communication support, and EMI suppression, meeting the stringent requirements of automotive battery monitoring systems.
Key Features of Elec & Eltek BMS Transformers
1. High-Voltage Isolation
Supports hi-pot isolation up to 4300V, ensuring safe operation in high-voltage battery environments.
Complies with AEC-Q200 automotive standards.
Provides functional insulation to protect circuits from electrical surges and potential differences.
2. Optimized for Serial Communication
Supports isoSPI and SPI daisy chain connections for reliable board-to-board communication.
Low insertion loss and high common-mode rejection ratio (CMRR) for enhanced signal integrity.
Compact form factor for seamless integration into BMS modules.
3. Wide Operating Temperature Range
Operates reliably within a range of -40°C to +125°C, with certain models extending to +150°C.
Suitable for harsh automotive environments.
4. EMI Suppression & Signal Integrity
Designed to minimize electromagnetic interference (EMI).
Supports return loss of up to -20dB @ 4MHz, improving signal stability.
Offers high insulation resistance (400MΩ min) to maintain data integrity.
5. Compact & Durable Construction
Surface-mount device (SMD) 6-pin transformers with a compact footprint.
Dimensions as small as 7.62 x 9.27 x 5.72mm, enabling high-density PCB layouts.
Creepage distance of over 5mm for enhanced safety.
Detailed Specifications of Elec & Eltek BMS Transformers
Model | Isolation Voltage (VDC) | Turns Ratio | Inductance (uH) | Operating Temp (°C) | Dimensions (mm) |
|---|---|---|---|---|---|
ESA21V00037F | 4300V | 1CT:1CT ±2% | 150-450 | -40 to +125 | 7.62 x 9.27 x 5.72 |
ESA21V00038F | 4300V | 1CT:1CT ±2% | 150-450 | -40 to +125 | 7.62 x 9.27 x 5.72 |
ESA21V00039F | 4300V | 1CT:1CT ±2% | 300 min | -40 to +150 | 8.38 x 7.69 x 4.25 |
ESA21V00040F | 4300V | 1CT:1CT ±2% | 150 min | -40 to +125 | 12.15 x 15.43 x 3.45 |
Industry Applications & Use Cases
Electric & Hybrid Vehicles (EV/HEV)
Ensures safe isolation between high-voltage battery cells and control systems.
Supports reliable communication in daisy chain BMS architectures.
Energy Storage Systems (ESS)
Used in battery storage systems for grid energy management.
Enhances long-term operational safety.
Industrial & Renewable Energy Applications
Suitable for power distribution systems requiring high isolation.
Used in solar and wind energy storage applications.
Why Choose Elec & Eltek BMS Transformers?
Automotive-Grade Reliability: Designed to meet AEC-Q200 standards for EV battery monitoring.
Compact & High-Performance: Delivers high isolation, EMI suppression, and efficient power conversion.
Customizable Solutions: Offers bespoke designs for specific BMS configurations upon request.
Long-Term Durability: Built to withstand extreme temperatures and electrical stresses.
Conclusion
The Elec & Eltek BMS Transformer line-up provides a robust, reliable, and efficient solution for battery management systems in automotive, industrial, and renewable energy applications. With high isolation strength, EMI suppression, and compact designs, these transformers are engineered for high-performance battery monitoring and safety.
The BMS reference designs from several automotive qualified manufacturers specify Pulse transformer solutions. This new line up from Elec & Eltek offer a high-performance cost-effective alternative that are well worth consideration. Check out the options in our Cross-Reference tool here.
For more details, or to explore Elec & Eltek's custom solutions tailored to your application needs, contact Ineltek.