BMS enables continuous battery monitoring

May 28, 2021 // By Nick Flaherty
BMS enables continuous battery monitoring
Analog Devices has launched a battery management system (BMS) with ASIL-D functional safety and low-power features to enable continuous battery monitoring in automotive and energy storage designs.

The two BMS devices support all key battery chemistries, including zero-Cobalt LFP (lithium iron phosphate), for mass market electric vehicles (EVs) and energy storage systems (ESS) used for reuse and recycling of battery packs.

To ensure maximum range per charge, the vehicle power consumption must be managed not only during driving, but also when the vehicle is parked. The BMS devices support multiple battery cell configurations and deliver innovative low-power features that enable the battery to be monitored continuously even when the vehicle is turned off to ensure safety under all conditions while maximizing vehicle range.

The BMS products are optimized for 6-18 cell modules and include low-power continuous battery monitoring, state-of-the-art functional safety and high accuracy guaranteed across the entire vehicle lifetime and device temperature range.

The 12 channel ADBMS6815 has a maximum lifetime total measurement error of 1.5 mV and is stackable for high voltage battery packs. The ADBMS6815WFS models are designed for use in ISO 26262 applications for Automotive Safety Integrity Level Capability D (ASIL D), measuring all cells in 304 μs and with a sleep state supply current of 5.5 μA. Passive cell balancing up to 300 mA per channel is possible with a programmable PWM. The ADBMS6817 is an 8 channel version of the chip.

“Collaborating with Analog Devices has allowed us to scale our electric vehicle range to meet increasingly strict regulations and the growing demands of today’s EV owners,” said Zhu Jun, General Manager of New Energy Business at Chinese car maker SAIC. “These new BMS solutions will enable us to advance our commitment to safety and at the same time continue to make EVs accessible for mass market consumers.”

“Our customers have come to rely on ADI as the performance leader for BMS, especially as they are challenged to scale their EV fleets and stay ahead of new market requirements,”

“Our latest BMS products not only enable new features such as continuous battery monitoring, but also support battery recycling and reuse in energy storage systems to support the circular economy,” said Patrick Morgan, Vice President of Automotive at Analog Devices.

www.analog.com/adbms6815www.analog.com/adbms6817

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