Battery Management System
Bourns offers a full line of BMS transformers that deliver the advanced circuit isolation and EMI suppression capabilities needed for safe and efficient operation in e-mobility and industrial Battery Management Systems (BMS).
Designed to work with most major BMS IC chipsets, Bourns® BMS transformers are optimal solutions for Electric Vehicles (EVs) and Energy Storage Systems (ESS) where multiple large battery packs are connected in series.
●Molded Power Inductors
SRP series
・Shielded construction – low radiation
・Metal alloy / Carbonyl powder core
・High operating temperature
・High rated current
・Low DCR
・Low buzz noise
・Size from 2×1.6 to 23x22mm
・Inductance range from 0.1 to 100µH
・AEC-Q200 compliant
●BMS Low Power Transformer
HCTSM8 series
・Low profile (6.5 mm) housing with > 8 mm clearance and creepage
・Toroid core for high coupling and low radiation
・Complies with IEC 60950-1, IEC 62368-1 and IEC 60664-1
・UL 62368-1 recognized, File No. E515965 (six models)
・Reinforced insulation for working voltage of 800 Vrms, 1000 Vpeak
・Designed for isolation power supplies using TI SN6501 and SN6505B
・AEC-Q200 compliant
●LAN Transformer
SM91076L
・IEEE 802.3u (100Base-T) compliant and MMA suggested
・Mechatrolink automation protocol compliant, included in Mechatrolink III
・Additional metal shield for surge immunity and superior EMC performance
・Compliant to IEC 61000-4-5 surge immunity test level 3 (2000 V)
BMS Transformers
In particular, Bourns’ portfolio of BMS AEC-Q200 compliant signal transformers provides the features necessary to monitor essential safety factors such as temperature, state-of-charge and device health.
These surface-mount, single- or dual-channel transformers are designed with high 1000 V or 1600 V working, inductance values in the 150 µH to 450 µH range with an operating temperature up to +150 °C.
To increase their electrical isolation protection against overvoltage transients, Bourns uses fully insulated wire that has passed the hi-pot test (dielectric strength) in its AEC-Q200 compliant BMS transformers. In addition, these signal transformers support the widely used and higher data rate serial daisy chain/isoSPI™ communication interfaces.in series.
●BMS Signal Transformer
SM91501ALE
・Two channels with choke
・Supports serial daisy chain / IsoSPI
・Holds reference designs with Analog Device’s Model LTC6804-1/6811
and NXP’s MC33771/33772
・Operating temperature: -40 to +125 °C
・1600 Vdc working voltage
・Hi-Pot: 4300VDC or 3100VAC
・AEC-Q200 compliant
SM91502ALA-E
．Transformer + choke
．Temperature range: –40 °C to +125 °C
．Inductance: 150 µH ~ 450 µH
．Functional insulation
．Working voltage: 1000 VDC
．Hi-Pot: 4300 VDC
．Single channel
．AEC-Q200 compliant