SYSTEM INFORMATION LiTHIUM BALANCE Scalable Battery Management System (s-BMS v6) Housed and loose board battery management solutions and accessories INTRODUCTION Lithium Ion batteries offer high performance and good longevity, but they do not tolerate abuse or misuse. Battery Management Systems (BMS) are required to ensure that Lithium Ion (Li-Ion) batteries or battery packs operate safely and reliably. The LiTHIUM BALANCE s-BMS is an exceptionally flexible and cost effective BMS suitable for industrial applications including material handling, automo- tive, marine and stationary applications. System description The system is designed around a distributed archi- tecture with a master board (BMCU) communicating over a galvanically isolated RS485 bus with up to 32 slave boards (LMU). Each slave board can connect 3 - 8 cells in series and 2 temperature sensors. The system is available as loose PCB boards or housed units with IP 61 protection. The s-BMS supports all commercially available Li-Ion chemistries with no restriction on pack current. FEATURES Factory calibrated cell voltage measurement circuit (<2mV typical, <10mV max.) For battery packs ranging from 12 -1000V with up to 256 cells in series Individual over/under voltage & over current protection Measures cell voltages, cell temperatures, SoC, SoH, pack current, pack voltage and many other parameters Onboard system operational log for warranty support Contactor driver circuit including precharge function Real time short circuit and isolation (leak) fault detection Close loop charger control using PWM, analogue or CAN. Up to 840mA balancing current dependent on cell voltage Galvanic isolation on all major interfaces/connections* Extremely high EMI resillience (>200V/m @ 80-2400MHz) Real-time diagnostics via PC interface (RS232) or CAN Fully configurable CAN bus supporting CAN 2.0A&B Fully bootloadable firmware on all boards Battery models for power prediction and SoC calculation * Except CAN bus www.maurelma.ch
LiTHIUM BALANCE Scalable Battery Management System -BMS … · 2014. 9. 23. · Lithium Ion batteries offer high performance and good longevity, but they do not tolerate abuse or
LiTHIUM BALANCE Scalable Battery Management System (s-BMS
v6)
Housed and loose board battery management solutions and
accessories
INTRODUCTION
Lithium Ion batteries offer high performance and good longevity,
but they do not tolerate abuse or misuse. Battery Management
Systems (BMS) are required to ensure that Lithium Ion (Li-Ion)
batteries or battery packs operate safely and reliably.The LiTHIUM
BALANCE s-BMS is an exceptionally flexible and cost effective BMS
suitable for industrial applications including material handling,
automo-tive, marine and stationary applications.
System descriptionThe system is designed around a distributed
archi-tecture with a master board (BMCU) communicating over a
galvanically isolated RS485 bus with up to 32 slave boards (LMU).
Each slave board can connect 3 - 8 cells in series and 2
temperature sensors. The system is available as loose PCB boards or
housed units with IP 61 protection. The s-BMS supports all
commercially available Li-Ion chemistries with no restriction on
pack current.
FEATURES
Factory calibrated cell voltage measurement circuit (
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Figure 1s-BMS Control unit
capable of managing 16 cells in series
SYSTEM INFORMATION
ApplicationsThe LiTHIUM BALANCE s-BMS is suitable for all
industrial applications using Li-Ion battery technology. For
transport applications it provides the necessary EMI and
environmental test performance for harsh vehicle environments. The
precise and reliable SoC calculation helps to reduce range anxiety.
Stationary applications are often unsupervised and may have long
periods between operation. With all aspects of the BMS operation
constantly self monitored and a low power consumption, the system
can safely work autonomously for extended periods of time. The
distributed intelligence architecture allows the LMUs to perform
balancing in the absence of a dedicated charger.
HardwareThe s-BMS hardware has been designed with special
consideration for EMC performance. All connections to and from the
boards are protected by transient voltage suppression circuits
(TVS). Cell monitoring circuits are additionally protected against
ESD and voltage spikes. The communications bus is an RS485 bus
galvanically isolated from the high voltage bus. The communications
bus is also protected with TVS circuits. The result of these
measures is EMC performance greatly exceeding any of the applicable
automotive or industrial standards. The housed version includes the
s-BMS Control Unit which contains a BMCU and 2 LMUs in an IP61 unit
designed to dissipate heat from thepassive balancing circuit. The
Control unit can manage up to 16 batterycells in series and
provides all of the connection options of the loose boards via an
easy to use family of dedicated cables. The s-BMS Control unit can
daisy chain up to 15 Monitoring units, each of which can monitor up
to 16 cells.
SYSTEM INFORMATIONwww.maurelma.ch
http://www.maurelma.ch
Page 3
SYSTEM INFORMATION
The PC SoftwareThe PC software is the gateway to the s-BMS
providing an easy to use suite of system configuration tools as
well as displays for monitoring battery and BMS performance. The
Diagnostic Software allows the user to field update the system
quickly and provides the interface for setting battery parameters
such as limit volt-ages and temperatures, allowable charge and
discharge rates.Other features such as the onboard battery model
can be setup to provide intellingent rate control to the load or
improve the SoC estimation by adding temperature and C - rate
compensation. Cell and pack resistance can also be displayed.
CAN busTo simplify integration, a powerful, fully
user-configurable CAN bus plat-form is included allowing CAN
messages to be constructed at “Bit level“ to broadcast any of the
parameters measured or calcuated by the BMS. A post processing
module allows you to scale and manipulate values, so that can get
the BMS to broadcast exactly what you want on the CAN bus with no
custom programming. You can configure up to 15 messages each with
up to 25 signals. SafetyA key function of any BMS is safety. The
s-BMS provides notification and user-definable system responses for
27 different fault and 17 warning condi-tions in charge and
discharge mode, separately.
Figure 2PC Software interface
showing battery pack status as well as providing the necessary
configuration
