New Reference Design Board from ams for 48V Lithium Battery Monitoring Systems
September 14 2015 - 3:53AM
Business Wire
Board provides complete solution for monitoring of high-side
current as well as cell voltages and temperatures
Hard-wired implementation with simple software eases
compliance with ISO 26262 functional safety standard
ams AG (SIX: AMS), a leading provider of high performance
sensors and analog ICs, today launched a reference board for a
small, high-performance and simple 48V automotive battery
monitoring system.
The board is suitable for use in the next generation of single
48V lithium battery systems, and in dual 48V/12V battery systems,
such as those used in passenger and light commercial vehicles and
electric scooters and motorbikes.
The ams 48V board provides a complete battery monitoring and
safety system on a single, compact PCB. It measures the flow of
current through the battery, and the voltage and temperature both
of the entire battery and of individual lithium cells.
The board’s high-side current sensor is connected to the
battery’s positive terminal. This has enabled ams to include a
battery disconnect switch on the board which is automatically
actuated when the current sensor detects an overload condition.
This protects the battery’s cells from damage and helps to prolong
the life of the battery.
The ams board also implements an innovative method of cell
balancing in hardware, without the intervention of a
microcontroller or processor.The board compares the voltages of
individuell cells and switches the charge and discharge current
between cells in order to maintain an equal voltage across all
cells.
Because the entire 48V battery monitoring system operates
without complex application software, it is quick and easy to
implement in a vehicle’s power management system. It also makes it
easier for power system designers to achieve compliance with the
ISO 26262 functional safety standard, because it eliminates the
need to develop, test and verify the safe functioning of complex
algorithms for error compensation and cell balancing.
‘The new battery monitoring reference board from ams shows that
48V power systems in vehicles do not have to be complex or
difficult to implement. The high performance of the ams board is
due to the precision and accuracy of its analog components and
on-board 48V precision attenuator. This means that it can do
without the complex error compensation software and high-end
microcontroller required by other 48V battery monitoring systems,’
said Sabine Jud, marketing manager in the mobility sensors product
line of ams.
For further information on the 48V reference design board,
please visit
www.ams.com/Battery-Monitoring/48V-Reference-Board.
Download press picture and block diagram at
http://www.ams.com/eng/Press/Press-Releases/
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version on businesswire.com: http://www.businesswire.com/news/home/20150914005424/en/
ams AGMedia RelationsPatricia Moosburgerphone: +43 (0) 3136 500
31235press@ams.comwww.ams.com
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