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Selecting BMS Transformers for Isolated
Communications in High Voltage Energy Storage
By Bourns, Inc.
Overview of Lithium-Ion Battery Chemistries
Introduction
Battery Management Systems (BMS) connect to high-
energy battery packs and manage the charging and
discharging of the pack. They also monitor essential safety
factors including temperature, state of charge, and the
pack's state of health. Providing additional application
protection, the BMS is able to connect the battery and
disconnect it from the load or charging source, as required.
This application note provides an overview of the key
features of battery monitoring Integrated Circuits (ICs)
typically specified in BMS. It includes background
information on battery cell chemistries as they relate to the
requirements for communications in high voltage BMS. An
application example will be used to explain the technology
benefits that Bourns
®
transformers deliver to meet these
specifications.
Figure 1: Forecasted Growth in Lithium-Ion Sales
[1]
