MiniBMS carries one year warranty from the day of purchase for parts and labor. We
are not responsible for damage to BMS or your other property due to incorrect
installation or operation
Cell Module -
you should get one module for each cell, be sure to order correct
quantity for your battery pack. Modules come fully assembled and
ready to be installed on the battery cells. Standard HVC (high
voltage cutoff) voltage available is 3.6V. Shunting voltage is set to
0.1V less than HVC voltage. 3.8 HVC is available if needed (e-mail
us), most manufacturers are now recommending to use the standard
Head End Control Board - $48.00
EV, to interface your cell modules with
your charger and motor controller.
Mini-BMS BATTERY MANAGEMENT SYSTEM (BMS)
Designed for Electric Vehicles. MiniBMS is designed to be reliable and cost effective
solution; it has THE most basic functions, implemented via simple analog circuit and
one wire interface, which also allows easy installation and troubleshooting
LVC function- warning of individual cell low voltage-audible and/or
relay enabled for limiting power
HVC function- can shut down your charger when individual cells
reach a set limit-either though your charger, or with additional relay
Charge shunting-can "top balance" with a .75a shunting ability
Build a car for you, not for them ! (the oil
conversions since 1975
QUALITY ELECTRIC VEHICLE CONVERSIONS AND PARTS
Main features of the EMUS BMS
Type Distributed with central control unit
Cell count 2÷255
Cell type Any in 2÷5 V range (LiIon, LiPO, LiFePO4, ...) prismatic cells, other custom shapes cell modules available upon request
Battery pack voltage From 4 to 1300 V
Balancing type Dissipative
Cell module shunt resistor 2,7 Ohm 5W
Maximum balancing current 1.5 A
Cell Module consumption 0,5 mA average, 8 mA peaks
Control Unit consumption 40 mA average
Cell Module communicationspeed ~2,3 ms per cell, allows to receive 45 cells parameters information in approx. 0,1 second
Control Unit RS232 speed 57600 bits/s 8N1
Control Unit supply voltage range 7 – 20 V
Control Unit outputs maximum drive current 0,5 A
Cell Module dimensions 50 x 30 x 17 mm
Control Unit dimensions 95 x 50 x 30 mm
Additional features highlights of the EMUS BMS
*Weather protection Control Unit is hermetically sealed to meet IP55 requirements.
Internal electronics protected with conformal silicone coating. Cell Module's electronic parts coated with silicone conformal coating
protecting circuits from moisture and dust.
*Suitable for different cell sizes
Small size of the cell modules and variable length „+“ terminal wire allows installation on the prismatic cells of different sizes
Cell modules can be installed without tools (only a bolt wrench is needed for cell terminals) as cell modules have spring loaded terminals that
allow reliable connection of wires by hand. Pre-cut inter-connection wires are supplied in the shipped package for quicker installation
*When connected to Control Unit blinking green LEDs on Cell Modules indicate live communication and allow quick identification
of problematic cell connection.
*Configurable BMS has various parameters that are configurable by using convenient Emus BMS Control Panel PC software over USB
connection: pre-charge, pre-heat, timeouts, cell voltages (min andmax allowed, early balancing threshold, allowed disbalance, etc),
currents (maximum balancing current, charge modes), cell parameter read interval, etc...
*Configurable balancing current range Linear zero to max, configurable maximum balancing current –
useful to define maximum balancing current and amount of heat dissipated by modules during balancing.
*Cell voltage measurement Real-time bar graph on LCD or PC – useful to detect faulty cells and track battery health, or as general visualisation
for advanced users.
*Cell temperature measurement Real-time value on LCD and bar graph on PC – useful for controlling charger and load in high temperatures, for
setting charging mode and contol of battery heater in cold weather (lithium batteries can‘t becharged below freezing point). Many other BMS
systems are not suitable for use in cold environment.
*Early cell balancing Balancing is done while charging, battery pack is in balance when charged – takes no additional time. Many other BMS
systems start the balancing only when at least one cell is fully charged and overall charging time is drastically increased (in terms of hours).
*Digital one-wire interface between cells Allows neat and robust installation with lowest count of wires that could break; with Forward Error
Correction – increases data transfer robustness and drastically reduces possibility of faulty data – data is corrected by Control Unit, even if it
arrives with errors caused by high EMI levels.
*USB interface USB 2.0 compatible, with free, intuitive and easy to use, good quality Emus BMS Control Panel windows application.
RS-232 interface Periodically sending the working status and parameters which can be received by LCD display or other device. Parameters
output format specification is available upon request.
*CAN interface Used for controlling CAN-capable charger and broadcasting working status and parameters to other devices that could be
connected on CAN bus. Broadcasted parameters specification is available upon request. Other peripherals support is possible after firmware
*CAN-equipped charger controlPrecise charging process control by setting required charging voltage and current and monitoring actual values.
Currently chargers produced by www.hztiecheng.com are supported. Additional models can be added by software upgrade
*Simple charger control Ordinary charger may be conveniently used as BMS detects charger's plug connection to AC mains outlet via optional
isolated charger sensing solid state relay. Charger switched on and off via same solid state relay.
*Charge rate selection A switch input which can be used by driver to select charging speed when CAN-equipped charger is used. This allows to
use lower power AC mains sockets for charging the vehicle.
*Battery pre-heat control Ability to use external battery heater: in cold weather heater is switched on and charge rate is significantly lowered, until
battery temperature reaches specified value which is configurable. For hot weather regions this function output may be re-mapped to control the
cooling fan of cells or for other tasks.
*Current measurement Dual range isolated sensor for measuring currents up to 1000A inboth directions. Dual range allows precise measurement
of smaller currents up to 100A while keeping possibility to measure big currents up to 1000 A with the same sensor. If needed bigger current
sensors are available upon request.
*State-Of-Charge (upcoming with current sensor release in June 2011) When current sensor is used Emus BMS calculates remaining
available energy which can be displayed on graphical LCD screen, sent over CAN bus to other devices or sent to analog gauge as pulses
or analog voltage of SOC output. It also estimates remaining charge and driving range/time left; on stock fuel gauge: current remaining charge
(just like fuel left in the tank).
*Distance / speed sensor input (upcoming with current sensor release in June 2011) Control Unit has dedicated input for vehicle speed sensor
which enables BMS to count traveled distance and energy consumption. This allows to forecast the driving distance left based on energy
remaining in the battery and driving style.
*Battery low indication Early, based on configured warning voltage, or calculated upon consumption (if current sensor is used); buzzer, lamp,
stock fuel gauge, LCD.
*Integrated real-time clock Control Unit contains realtime clock which is used for accurate time tracking of charging events.
*Voltage transients protection Inputs and outputs protected from transient voltage spikes
Control Unit reverse connection protection
Fuse protected control outputs
Outputs are protected by 0,5A resettable fuses
Simple LED / Buzzer indication If LCD screen is not used a simple LED indicators along with Buzzer output may be used for audio-visual
information about BMS operation
Flexible inputs and outputs function mapping Several functional inputs and output like buzzer output and ingition key input etc. can be remapped
for different functions to allow flexible customization for different applications and addition of new functions in future by software upgrade. Inputs
and outputs remapping is configured in BMS Control Panel software for PC.
Fault condition logging Read over PC software – useful for problem solving and warranty
BMS operation statistics (coming in July 2011) BMS stores the statistical data into memory such as lowest recorded cell voltage which cell had this
voltage etc.The statistics may be reset to accumulate data.
Free firmware upgrades Control Unit firmware is easily upgradable over USB by using Emus
BMS Control Panel software for PC; bugfixes and new features
constantly released, feature requests accepted – each request counts.
Free LCD screen software Open-source Windows Mobile application EVGUI is available.
Anyone can use and edit to their needs; used on pocket PCs, such as
iPAQ (with RS-232 interface).
EVGUI is a framework allowing to customize the way information is
displayed on iPAQ LCD screen without programming languages
knowledge by editing configuration text file and preparing suitable
Quality control Designed and manufactured in European Union, each unit checked
and has it‘s own barcode for extensive quality control.
User‘s manual English, multiple pages with images, diagrams and install guide.
Battery Management System (BMS):
-Support of various charging algorithms by flexible software upgrades
-Voltage and current control of battery charger via CAN bus
-Supported CAN charger: currently Elcon PFC series, other models implemented by software upgrade
-Observation of every battery cell voltage and temperature
-Control of battery cell equal charge applying shunting current
-Gradual control of shunting current from 0 to maximum
-Possibility to limit shunting current to specified maximum
-Peak dispersive capacity of cell compensation current: 5W
-Easy battery connection via one wire going between adjacent cells
-Easy expansion of number of controlled cells
-Maximum number of controlled cells: 255
-Single cell voltage range: 2-5V - the best fit for LiIon, LiPo, LiFePO4 chemistries.
-Voltage measurement accuracy: +/- 0,01V
-Temperature measurement accuracy: +/- 5ºC
We now offer THREE types of BMS systems !
1--the MINI-bms system that is designed to protect your lithium battery investment with
cell level high voltage warning / charger cutoff, low voltage warning / cutoff, high
temperature warning / charger cutoff, and optional small balance shunting, using the
simplest lowest cost design for lithium cell protection.
2-- the Manzanita Micro regulators are designed for use with the manzanita line of
battery chargers. With high accuracy and easily programmable high and low voltage
set points with direct communication to the charger for output control, makes it simple
to manage Lithium or Lead acid battery packs.
3-- the ELEKTROMOTUS bms, designed for user programmability with a real time
display available, also with high voltage warning / charger cutoff (using CAN if desired)
low voltage warning / cutoff, high temperature warning / charger cutoff, and adjustable
shunt balancing capabilities and MUCH more !
CELL BOARDS 19.95 EACH
CONTROL UNIT 365.00
SPECIAL PRICING !
THE Mini-BMS IS NO LONGER AVAILABLE AT THIS TIME
|BATTERY MODELS example
||HiPower 60 AH, CALB/TS 40-60 AH, GBS
||CALB/TS/Winston/Sinopoly 90-200 AH
||HiPower 100AH, RealForce 80-220AH
||TS/Winston 200-260 AH Wide
||HiPower 160-300 AH, CALB/TS 300-700 AH
Manzanita Micro Digital Battery Management System
Anytime lithium cells are connected in series to make higher voltage battery packs, as is the case in electric
vehicle applications, the usable capacity of the entire pack will only be as much as the capacity of the lowest
cell. Even if a battery pack is well-matched when new, imbalances between the cells will occur over time. The
primary function of a Battery Management System (BMS) is to facilitate equalization at the module or individual
cell level so that the entire battery pack has as much useable capacity as possible.
The other benefits of the Manzanita Micro Mk3 digital BMS line of products is rapid monitoring of individual cell
voltages and temperatures. There are a variety of free software options available for download from
www.manzanitamicro.com which allow for a clear visual display of the battery and cell data. With high accuracy
and easily programmable high and low voltage set points the Mk3 BMS is an exceptional solution for many
electric vehicle lithium battery packs, stationary power supply packs and also for battery testing.
Connecting to the BMS with any Windows based computer is easy with the USB Dongle Terminator. The
optional Rudman Bus Display (RBD) allows for an independent in-dash touch screen solution. The Mk3x4smt
will manage 4 lithium cells, the Mk3x8 will manage as few as 5 or as many as 8 lithium cells and the Mk3x12
will handle between 7 and 12 lithium cells.
All of the BMS units use an intuitive command structure and are very simple to set up. Real-time status LEDs
on the boards themselves indicate high and low conditions as well as which cells are full (when dissipating
energy during equalization). The red undervoltage latch LED is useful for spotting the weakest modules after a
discharge situation (such as a long drive for an EV). Specific historical data of maximum voltage high and low
points are stored in the BMS unit's internal memory and can be easily viewed on the RBD or using the
graphical Reg Scanner program on a PC or even using simple text commands in any terminal program.
The Manzanita Micro BMS is a feature rich system and unlike many other BMS options, the Mk3 series units
do not require any expensive central control module. Instead, each individual BMS unit can function on its own
or with many others connected. This makes it very easily scalable and allows for adding or subtracting
batteries if future needs change. Long sense wires are a thing of the past with a Manzanita BMS. The Mk3x4
and Mk3x8 units can be made to plug directly into the Manzanita Micro Reg Deck eliminating cell wires!
Mk3x4smt Mk3x8 Mk3x12
Voltage monitoring of: 4 cells 5 to 8 cells 7 to 12 cells*
Dissipation channels 4 8 12
Recommended voltage measuring range 1.75 to 5.5 VDC** per cell 1.75 to 5.5 VDC** per cell 1.75 to 5.0 VDC** per cell
Recommended supply voltage range for unit. 10 to 24 VDC 10 to 48 VDC 10.5 to 60 VDC
Absolute min and max supply voltage for unit 7 to 35 VDC 9 to 50 VDC 9 to 60 VDC
Dissipation ratings ~33 watts*** ~75 watts*** ~2.4 watts***
Dissipation temperatures Up to 180°F (82.2°C) Up to 180°F (82.2°C) Up to 180°F (82.2°C)
External temp sensor inputs 4 8 6
Internal temp sensor Yes, 1 is built-in Yes, 1 is built-in Yes, 1 is built-in
Cell voltage sampling rate 62.5mS per cell 62.5mS per cell 62.5mS per cell
RS232 rate 9600 Baud 9600 Baud 9600 Baud
Max number of units in a system 30 boards (120 cells) 30 boards (240 cells) 30 boards & up to 254 cells
Dimensions L x W x H 5 in x 3.5 in x 0.875 in 7 in x 2.37 in x 0.938 in 4.75 in x 3.938 in x 0.625 in
Total weight of unit 2.7 ounces 3.6 ounces 1.9 ounces
Isolation rating 1,000 V 1,000 V 1,000 V
Current draw while idle 10 milliamps 3 milliamps 2 milliamps
Supported voltage sense wire size range 22 to 20 awg 22 to 20 awg 22 to 20 awg
External fan control 12VDC variable speed 12VDC variable speed None
Communication ports 2 Regbus RJ ports 2 Regbus RJ ports 2 Regbus RJ ports
Analog comm. lines High/Low cell or Hot Reg High/Low cell or Hot Reg High/Low cell or Hot Reg
Unit Protection Integrated Polyfuse Integrated Polyfuse Integrated Polyfuse
Pre-made voltage wiring harness Housing & pins kit incl. Includes full 3ft multicolor 10-
( (Full harness available ) wire harness assembly
* The Mk3x12 BMS unit can measure as few as 7 cells when user-calibrated as described in the Mk3x12 owner's manual.
** The Mk3x4, Mk3x8 and Mk3x12 units can measure individual cell voltages down to zero volts as long as the rest of the cells
connected to the unit are supplying enough voltage for the unit to function.
*** Wattage ratings will vary depending on the voltage of the cells that are connected to the BMS and also depending on if they have
active fan cooling or are mounted to a larger heat sink. Mk3x12 units have no heat sink or fan control. Mk3x4 and Mk3x8 units can
shunt approximately 2.5 amps so higher input voltage levels will yield higher wattage ratings.
The MK3x8 is an eight
channel Lithium Ion
Regulator like our Mk3x4 four
channel regulator. With the
change from through-hole to
Surface Mount we have been
able to decrease the per cell
price and shrink the size from
8x4 inches to 6.9x2.4 inches
with twice the channels. It
has the ability to run on as
few as 4 cells and any
number up to 8. The MK3x8
dissipates 2.5 amps per
channel speeding up the
NOW SHIPPING WITH:
-TEMP SENSOR KIT:
Includes mating connector,
contacts, heat shrink, and 8
temp sensors, or UPGRADE
with the drop down menu to
purchase the fully assembled
3ft harness. You just cut the
wires to length and attach the
Includes fully assembled 3ft
harness with mating
connector, just cut to length
and add ring terminals (RING
TERMINALS NOT INCLUDED)
For additional products such as a fan,
extra harnesses, communication cable,
modular jacks, and crimpers please
check out the manzanita charger
section of our website
This NEW MK3x12LD has all of
the monitoring features of the
MK3x4 and MK3x8 regulator,
including high voltage and low
voltage detection without the
cost of high amperage
dissipation and the need for an
external heatsink. The regulator
does still offer 60 mA of
dissipation, perfect especially for
those low amphour cells.
-TEMP SENSOR KIT: Includes
mating connector, contacts, heat
shrink, and 6 temp sensors, or
UPGRADE with the drop down
menu to purchase the fully
assembled 3ft harness. You just
cut the wires to length and attach
the temp sensors.
-VOLTAGE HARNESS: Includes
fully assembled 3ft harness with
mating connector, just cut to
length and add ring terminals
(RING TERMINALS NOT
MK3x4SM TKEY FEATURES
· Real time voltage monitoring of 4
· Real time temperature sensing of
up to 4 external temp sensors
Additional temperature sensor
included on BMS module’s heat sink
· Small size is less than 1 inch thick
and 5 inches long by 3.5 inches
· Quick automatic cell equalization
and balancing with high and low
voltage on board indicators and
outputs to the charger
· All BMS modules connect
together using readily available RJ
· BMS easily connects to a PC
using the DT and USB Cable
(Dongle Terminator and USB Cable
· Includes free Windows based
scanner and command software
· Easy user adjustable min and max
voltage parameters allow flexibility
for various types of lithium cells
from 1.75 to 5.5 volts per cell
· Each BMS board can bypass up to
3 amps equating to fast charging
and equalization of unbalanced
· Dual RJ reg bus ports for easy
connection to the charger or other
· Self regulating thermal protection
and feedback to Manzanita Micro
· Built-in active variable speed fan
control output on each BMS unit
· Flat heat sink is totally isolated
from the cells and is already
threaded for easy mounting to
whatever will hold the unit or even
to a larger heat sink
NOW SHIPPING WITH:
-TEMP SENSOR KIT: Includes
mating connector, contacts, heat
shrink, and 4 temp sensors.
-VOLTAGE KIT: Includes mating
connector, and contacts.
The MK3SMT digital LEAD ACID Regulator is a voltage controlled bypass regulator with
The Mk3 digital regs allow the user to simply connect to a computer and read the actual
battery voltage of the regulator. Additionally, the user can read the temperature of the
regulator itself to see how hard it is working and one can hook up an extra temperature
sensor to read temperature of the battery as well. With an easy to use ASCII command
structure the user can adjust the low voltage set point as well as the high voltage regulation
set point and a host of other regulator functions.
Protect your advanced lead acid AGM batteries from over voltage conditions. Modern
AGM type batteries fail to equalize their charging voltages when charged in a series string.
A Rudman Regulator on each 12 volt battery or block of batteries will protect them from
over voltage damage during the last phase of a charge cycle.
The easiest way to maintain a equal charge on any single battery during a charging cycle
is to regulate it's voltage. If all the batteries in your series string are at the same voltage
during the Float stage of charging, then they will be equalized as much as possible. AGM
type batteries capacity vary during manufacture, and they tend to get out of equalization
during use during heavy EV cycling. The first battery to "fill Up" has a higher resistance and
then robs the other batteries of the charging current that they need to be totally charged.
Then during discharge the same happens to the first battery to be completely empty. So
some batteries get damaged from over voltage and thermal, and some get damaged from
cell reversal and never fully charged. An AGM string has very little "give" to it while finish
charging. A battery bypass regulator gives the string the "give" it needs to protect the first to
get full, and to pass the unneeded power along to the batteries that still are charging.
MK3SMT Key Features
Real time voltage monitoring of a single 12V lead-acid battery
• Optional voltage monitoring for use with two 6V batteries in series
• Real time single channel external temperature sensor input plug
• Additional temperature sensor included on BMS module’s heat sink
• Small size is only about 4 inches long by less than 3 inches wide and less than an inch
• Quick automatic battery equalization and balancing with high and low voltage on board
indicators and outputs to the battery charger
• Two high speed real-time warning lines which can be relay buffered for external use
• All BMS modules connect together using readily available RJ cable
• BMS easily connects to a PC using the included USB adapter (D/T Box)
• Free Windows based scanner and command software available from the Downloads
• All commands can be easily entered and read in simple ASCII text
• Easy user adjustable min and max voltage parameters allow flexibility for various types of
• Each BMS board can bypass up to about 3 amps equating to fast charging and
equalization of unbalanced batteries
• Dual RJ reg bus ports for easy connection to the charger or other BMS units in a simple
daisy chain fashion
• Self regulating thermal protection and feedback to Manzanita Micro Chargers
THE Mini-BMS IS NO LONGER AVAILABLE AT THIS TIME