being measured. A 40mA BCI test level is sufficient for most
industrial applications. The 200mA test level is typically used
for automotive testing. The Bourns® Model SM91501AL
and SM91502AL have been evaluated by certain BMS IC
manufacturers for select automotive applications and have
successfully passed requirements for BCI.
Summary and Conclusions
The demand for Li-ion battery power is predicted to
grow at a CAGR of 20-30 percent over the next eight
years. Battery Management Systems that integrate
isolated communications are expected to be an
important part of the safety and security of the battery
system. An effective and reliable BMS will help increase
the lifespan of Li-ion cells while also enhancing safe
operation for end users.
Offering an optimal protection solution for isolated
communications in industrial and consumer BMS
applications, Bourns engineered its latest Model
SM91501AL and SM91502AL BMS transformers with
the higher working voltages of 1600V and 1000V,
respectively. They feature an inductance value of
150µH and 450µH over an operating temperature range
of -40˚C to + 125˚C which meets higher voltage BMS
requirements. Additionally, the transformer windings
use fully insulated wire passing the dielectric strength
(Hi-POT) test, further increasing electrical insulation
protection for overvoltage transients.
Bourns
®
Model SM91501AL and SM91502AL have been tested
by several BMS IC companies in their test laboratories who found
them to function well with their chipsets, passing the necessary
BCI tests.
| 19 |
Key Features:
• -40°C to +85°C operating
temperature range
• 0.085Ω to 8.500Ω R1
maximum resistance
• 6V to 30V maximum voltage
Key Features:
• -40°C to +125°C
operating temperature
• Hi-Pot Isolation Voltage:
4300VDC
• Includes common mode
chokes for noise rejection
Key Features:
• Fast tripping resettable
circuit protection
• 0.05A to 1.75A hold current
• 0.090Ω to 50.000Ω R1
maximum resistance
MF-NSMF Multifuse
®
AEC-Q200 Compliant
PTC Resettable Fuses
BMS Signal Transformers
MF-USMF Multifuse
®
AEC-Q200 Compliant
PTC Resettable Fuses
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