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BMS Basic
User guide
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User guide [cs]
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GWL power BMS Basic User guide

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Technical manual
ELERIX BMS BASIC
www.elerix.com
PRODUCT WEBPAGE
EXM-BMS-Basic
and EXM-BMS-Basic-KIT
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ELERIX BMS BASIC
Description of Module
The BMS Basic module is a system platform for the management of lithium batteries. Its basic function is the protection of the battery in terms of the voltage of the individual cells and the overall current load.
This functionality is covered by a basic set of selected electrical components on a DIN rail. The module can be extended with functions as required by the application and the customer through additional components.
The module can be delivered as building blocks or at various stages and type of assembly.
MAIN FUNCTIONS AND FEATURES:
‣ Protection of the battery from dangerous overcharge and discharge on the level of the individual cells
‣ Protection (circuit breaker) of the basic power circuit and the control circuit from overload or short circuit
‣ Automatic emergency disconnection of the battery and simple manual disconnection of the battery
‣ Monitoring of up 16 battery cells and projecting their voltage states to the control outputs
‣ Large-scale exibility of the outputs for controlling various devices (inverters, MPPT regulators,
chargers…)
‣ Large-scale exibility of placement in various applications thanks to assembly on a DIN rail (built-in to the
switchboard, rack, plastic distribution board, under a BPF lid…)
‣ Simple service, replacement of components and extension of functions through additional modules
The module is part of the ELERIX series, meaning it is an open solution that is and will be compatible with
additional products and solutions from GWL as well as other similar available components.
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ELERIX BMS BASIC
Potential Uses
The robust and universal nature as well as the availability of the components and technical support options
predestine this module for various industrial applications and complex home installations. Its exibility
allows for the creation of many different solutions for LiFePO4 and LTO batteries.
‣ Stationary energy storage – photovoltaic systems, backup sources
‣ Machines, industrial electromobility, boats, recreational vehicles
‣ For various LifePO4 and LTO batteries form 24 to 48V (a max. of 16 cells in a series)
‣ Can be assembled by the customer with technical support provided by GWL (manual, instructional videos,
individual support)
‣ The option to have the module delivered assembled in a distribution board or integrated in an ELERIX BPF
battery box
Functions Explained
Individual battery cells are monitored via the ELERIX CPM module (for more information see the module manual: https://shop.gwl.eu/Battery-Management/GWL-Cell-Performance-Monitor.html).
Three auxiliary socket relays with a pair of switch contacts are connected to selected switch CPM outputs.
K1 Umin and K2 Umax relays are used for switching on appliances and chargers using software, for the direct switching on of small loads (up to 6A) and to control indicator lights, acoustic alarms, performance relays etc. These relays are permanently switched on when operational (if they are not being used, remove
them from the socket to decrease consumption of the module itself). The K3 Uemergency relay is used to disconnect the battery in an emergency. This occurs by switching off the main circuit breaker of the battery (125A) by sending an impulse to its voltage trigger. Control voltage leading to the actual connectors that is primed and can be switched off is also available.
The basic set can be extended to include other circuit breaking, removable and communication features.
Some typical extensions are listed in this manual. Various custom user connections can be created using different combinations of components and the way they are connected (including reconnecting the basic BMS Basic version).
WARNING
If the user is connecting all the BMS Basic outputs, it is important to maintain
their maximum load according to the values listed in this manual. These values must be adequately lowered for induction and capacity loads!
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ELERIX BMS BASIC
“Assembly” Set
List of components:
‣ ELERIX CPM ---------------------- 1 ks ‣ ELERIX CPM ---------------------- 1 pc ‣ CPM Holder ---------------------- 1 pc ‣ Relay nder ---------------------- 3 pcs ‣ Socket nder --------------------- 3 pcs ‣ 6A circuit breaker ----------------- 1 pc ‣ 125A circuit breaker --------------- 1 pc ‣ 125A circuit breaker voltage trigger --- 1 pc ‣ RS clip 35 mm2 ------------------- 1 pc ‣ RS clip 2.5 mm2 blue --------------- 2 pcs ‣ RS clip 2.5 mm2 red ---------------- 2 pcs ‣ RS terminal cover 2.5 mm2 ---------- 1 pc ‣ DIN rail -------------------------- 1 pc
The components are sent in a package and are designed so that the customer can assemble and connect them him/herself according to basic technical support provided by GWL. It is possible to order the assembly
of the module including connecting it as well as other services, e.g. extending it using other components, aspart of paid technical support. This basic set is in a scope of 18 modules on a 330mm DIN rail.
“Plastic Distribution Board” Set
The list of components is identical as in the “Assembly” Set. The components are attached and connected in
a plastic distribution board on a DIN rail for 22 modules, meaning there is a reserve in the distribution board
for adding other components in a scope of 4 modules.
“Rack rail 19”3U” Set
The list of components is identical as in the “Assembly” set. The components are attached and connected on a rack rail for 22 modules; the distribution board has a reserve for adding additional components in a scope of 4 modules.
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ELERIX BMS BASIC
Technical Specications
Model
Dimensions, weight
Length/width/height 330/107/80
Weight
Voltage, current, performance
No. of cells of protected LiFePO4 battery min/max 8/16
No. of cells of protected LTO battery min/max 10/16
Voltage of protected battery min/max 24/60V
Capacity of protected battery No limit
Current value of power circuit breaker 125A
Current value of the circuit breaker in the control circuit 6A
ELERIX BMS Basic – DIN rail
Current load of contracts of auxiliary relays 6A
Own consumption of auxiliary relay 0,64W
Own consumption of CPM 0,65W
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ELERIX BMS BASIC
Identification of Components, Description of Their Outputs and Their Usage
1 CELLS 16
GND
ELERIX CPM
Ucells
Ext
Umin
1 4
1 3
1 4
Umax
1 4
ELERIX BMS Basic
GREEN OUTPUTS
‣ aux relay switching ‣ low energy coil
power relay switching
‣ signaling switching
COM.i2c
Emergency
1 9
LIGHT BLUE OUTPUTS
‣ low load switching ‣ power relay switching ‣ signaling switching
A1 A2COIL
NC
NO COM
COM
NC
NO
A1 A2COIL
NC
NO COM
COM
NC
NO
WHITE and GRAY OUTPUTS
Protected power circuit:
‣ short circuit ‣ overload ‣ over/under voltage of
any cell
A1 A2COIL
NC
NO COM
COM
NC
NO
RED and BLUE OUTPUTSRED and
Protected control circuit:
‣ short circuit ‣ overload ‣ over/under voltage of
any cellany cell
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ELERIX BMS BASIC
Module Basic Configuration, Connection and Usage
1 CELLS 16
GND
Ucells
1 4
Ext
1 3
ELERIX CPM
Umin
1 4
1 4
Umax
Emergency
1 9
COM.i2c
A1 A2COIL
NC
NO COM
COM
NC
NO
A1 A2COIL
NC
NO COM
COM
NC
NO
A1 A2COIL
NC
NO COM
COM
NC
NO
ELERIX BMS Basic
AUXILIARY OUTPUTS MAIN POWER OUTPUT
Typical Extension Features
Multiplying modules used in BMS Basic (auxiliary relay, circuit breakers with trigger 125A and 32A)
‣
ELERIX BCC Module for controlling the CPM module and communicating with it
‣
Modules for service balancing
‣
Performance single inductors and bistable relay, SS relay, Victron Battery Protect etc.
‣
Additive sorting of entire BMS Basic modules for sets comprising more than 16 cells
‣
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ELERIX BMS BASIC
Some Examples of Connections and Extensions of the BMS Basic Module
a) EXTENSION OF PROTECTED CIRCUITS
BATTERY
+ BATTERY LINK
BMS BASIC
POWER FUSES, AUXILIARY RELAYPOWER RELAYS
1 CELLS 16
GND
ELERIX CPM
Ucells
Ext
1 3
Umin
1 4
1 4
Umax
1 4
Emergency
1 9
COM.i2c
A1 A2COIL
NC
NO COM
KM1
A1 A2COIL
NC
NO
COM
K1
NC
NC
NO
NO
COM
COM
K2 K3
A1 A2COIL
NC
NO COM
NC
NO
COM
FU1 FU2
A1 A2COIL
NC
NC
NO
FU4FU3
NO
COM
COM
FU5
K4
KM2 KM3
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ELERIX BMS BASIC
A load as well as a charger can be connected on the output of the FU1 circuit breaker in the basic BMS
Basic configuration in certain cases. The nature of the application, however, often requires that the load and the charger be controlled separately or that the load be divided into two branches, which are switched on
separately etc.
Description of one connection example:
The Bistable KM1 relay with a lower performance of inductors (according to the CPM specification) is controlled via “green” outputs. These outputs can also be used to control auxiliary NO/NC single inductor relays into the corresponding inductor power.
The bistable KM2 power relay with a large input power of the inductors must be controlled via impulses from
auxiliary K3 and K4 relays, which increase the impulses from the CPM outputs. Similarly, the K2 auxiliary
relay can be used to control standard single inductor power KM3 relays (in this case a power charger).
It is therefore always best, and may even be necessary, to use the “light blue” outputs for switching on power
relays.
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ELERIX BMS BASIC
b) COMMUNICATION AND SERVICE BALANCING
BATTERY + BATTERY LINK
1 CELLS 16
GND
Ucells
BMS BASIC
1 4
TCP/IP (RJ45)
+ BALANCING MODUL
1 3
Ext
ELERIX CPM
Umin
1 4
VV
Umax
1 4
ELERIX BCC
NOC2NCNOC1NCVDD
Emergency
1 9
SDA
SCL
GND
COM.i2c
A1 A2COIL
NC
NC
NO
NO
COM
COM
K1 K2
i2C
A1 A2COIL
NC
NO COM
NC
NO
COM
A1 A2COIL
NC
NO COM
NC
NO
COM
K3
FU1 FU2
1 8
GND
ON/OFF
GWL/CAB
COMMUNICATION MODUL
CAN
High-impedance voltmeters can be connected to the “green” outputs on the CPM to get basic information
onthe battery status. They transmit the value of the cell with the lowest (Umin - red) and the highest (Umax- blue) voltage from the entire module. “Green” IQ BUS outputs provide information on voltage in the i2c protocol, which can be used for the connected customer device (open source).
The connection to the additional ELERIX BCC component allows for listing of all values in the PC.
Concurrently, it allows for remote setup of voltage limits and controlling the “green” switch CPM outputs as
well as resetting and turning the CPM control board on and off. (Remote setup is preferred over mechanical
setup of the voltage switches). BCC has two auxiliary relays integrated, which can be used to switch on other devices in various modes and one-time commands. In the example listed, a cell service balancer is
switched on if a Umin/Umax state of the cells reaches a set limit. BCC manual:
https://shop.gwl.eu/Battery-
Management/GWL-Battery-Communicator-and-Controller.html
The passive CAB balancing module (under preparation) balances the battery cells if needed using a selected
balancing current and provides additional functions. One of these is the collection of values of voltage, current and SoC for the CAN bus, which can be used for the connected customer device (open source).
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ELERIX BMS BASIC
c) BASIC CONNECTION OF THE MPPT REGULATOR AND INVERTER
(CHARGER AND LOAD)
BATTERY + BATTERY LINK
BMS BASICBASIC SOLAR SYSTEM
1 CELLS 16
GND
ELERIX CPM
Ucells
Ext
1 3
Umin
1 4
1 4
RESET
A1 A2COIL
NC
NO COM
NC
NO
COM
Umax
1 4
Emergency
1 9
COM.i2c
K1 K2 K3
PVP MPPT TRACER
SW
SWITCH
A1 A2COIL
NC
NO COM
SW
SWITCH
A1 A2COIL
NC
NO COM
NC
NO
COM
FU1
FU2
DC/AC INVERTER
NC
NO
COM
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ELERIX BMS BASIC
WARNING
Disconnecting an active MPPT regulator from the battery may damage it in certain cases (in some products). If the entire battery is disconnected in the active MPPT regulator mode (any
charger) and in an active load, it can cause adverse statuses as a result of overow from the charger to the appliance without support from the battery.
This is why we recommend disconnecting the charger and appliance on separate branches, see the connection example a) or to use devices, which allow for software (SW) disconnections, as is the case here:
Once Umin is reached on a battery cell, the appliance is disconnected using software via K1 relays. Similarly, if Umax is reached on one of the cells, the MPPT regulator is disconnected using software via the K2 relay.
The battery remains connected and the load and charger are automatically connected again in a voltage hysteresis according to the CPM setting or by resetting the CPM.
The Umin/Umax battery cell protection using the K3 relay and the circuit breaker voltage trigger are then used only as backup and for emergencies
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ELERIX BMS BASIC
d) CONNECTION WITH VICTRON MULTIPLUS AND MPPT VE SMATRSOLAR
BATTERY + BATTERY LINK
1 CELLS 16
GND
BMS BASICBASIC CONNECTION VICTRON MULTIPLUS + MPPT TRACER
Ucells
1 4
1 3
Ext
ELERIX CPM
Umin
1 4
1 4
Umax
Emergency
1 9
COM.i2c
A1 A2COIL
NC
NO COM
A1 A2COIL
NC
NO
COM
NC
NC
NO
NO
COM
COM
K1 K2 K3
A1 A2COIL
NC
NO COM
NC
NO
COM
CENTRAL
STOP
RESET
PVP MPPT TRACER
SW SWITCH
VICTRON MULTIPLUS
AUX 1 AUX 2
GRID LOAD
FU1
FU2
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ELERIX BMS BASIC
Basic battery management in an off-grid or hybrid system with Victron features can be carried out in the following manner:
When operational, the MPPT regulator is managed through its own internal logic based on the overall battery voltage and charging current. Once Umax is reached on one of the cells, it is disconnected using software via the K2 relay. Once Uemergency (emergency status) is reached, the source is disconnected - i.e. the PV
panels are disconnected by switching off the FU3 circuit breaker via its voltage trigger and the K3 relay.
Victron Multiplus is set using its own internal logic for the given mode (ESS, UPS, Off Grid…) based on the
overall battery voltage and the current load. We set the SW disconnection of the inverter on one of its AUX
inputs when this AUX is disconnected (the “Two Signals BMS - battery empty” assistant), which disconnects
the load via the K2 relay once Umin is reached on one of the battery cells.
The FU1 circuit breaker with the voltage trigger is used for the automatic disconnection of the system from
all sources of energy once Uemergency is reached, or manually via Central Stop (emergency status).
The module can be extended using additional Victron features for monitoring, communication and other purposes (e.g. BMV, GX series etc.).
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ELERIX BMS BASIC
e) COMPLETE CHARGER MANAGEMENT (UPS SYSTEMS)
BATTERY WITH PASSIVE
BALANCERS + BATTERY LINK
1 CELLS 16
GND
Ucells
1 4
1 3
Ext
ELERIX CPM
Umin
1 4
1 4
Umax
Emergency
1 9
COM.i2c
A1 A2COIL
NC
NO COM
A1 A2COIL
NC
NO
COM
NC
NC
NO
NO
COM
COM
K1 K2 K3
A1 A2COIL
NC
NO COM
NC
NO
COM
FU1
FU2
AC GRID
LOADLOAD CONTROL
N
L
PE
M M
1 1
COM COMNC NCNO NOCOMNC NO
KA1 KA2 KA3
FU3
FU4
KM1
KM1
BMS INPUT
CHARGER WITH BMS INPUT BMS BASICEXTENSION MODULES
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ELERIX BMS BASIC
This extension of the BMS Basic module is used for the complete management of the network charger. It is
suitable, e.g. for service-free charging of the battery in backup systems and so forth. It provides the following
functions and modes:
Disconnection of AC and DC on the charger in rest mode (KM1, KM2 contractors)
‣
Charger protection on the AC and DC side (of the FU3 and FU4 circuit breakers)
‣
Emergency disconnection of the charger during dangerous voltage levels on one of the battery cells (CPM
‣
K3 auxiliary relay → voltage trigger on the FU1 circuit breaker)
Automatic switching on of the battery charging during a grid outage in a selected time (KA1 time relay →
‣
KM1, KM2)
Periodic charging of the battery in a selected daily or weekly mode (KA2 timer → KM1, KM2)
‣
Switching the charger to cell balancing mode (CPM K2 auxiliary relay → charger BMS output)
‣
Reset the balancing mode of the charger and emergency statuses in a selected daily or weekly mode
‣
(KA3--> reset CPM)
Are you interested in more details?
Visit our online presentation.
PRODUCT WEBPAGE
Page 16
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