Battery management system

BMS

The BMS module allows to create plants with large storage capacities. Up to 8 batteries for three-phase inverters with a capacity of up to 46.1 kWh.

A battery charge monitoring system (commonly designated as battery management system or BMS) allows the intelligent administration of the autonomy and safety of a storage system. The main purpose of the BMS is the optimal management of the batteries by balancing the cells to obtain the best possible performance in terms of lifespan, capacity and autonomy.

FEATURES

Allows the combination of up to 8 battery packs with a single three-phase inverter
Extends the storage capacity to a maximum of 46.1 kWh for rotary current
In case of parallel operation (A+B) the packs must always have an even quantity
Wall holders, cables and plugs included in scope of delivery

**Environmental performance**
Charging/discharging temperature range [°C]	0 to 55
Charging/discharging temperature range at full load [°C ]	5 to 48
Storage temperature [°C ]	-20 to +55 (3 months) 0 to 40 (1 year)
Air humidity [%]	0 to 100
Altitude [m]	2000
Protection type	IP55

**Communication**
Communication interface between inverter and BMS	CAN2.0/RS485
Communication interface between BMS and batteries	RS485
BMS status indication	3 LEDs (1 for each partial quantity + 1 summary)
Capacity indication of main control	2*4 LEDs (25 %, 50 %, 75 %, 100 %)
LEDs of battery module	2 LEDs
On/off switch	1 pushbutton + 1 switch

**Certification**
Safety	IEC 62477-1, IEC 61439-1, IEC 61439-2
EMC	IEC 61000-6-1/2/3/4
Compliance of transport regulations	UN38.3

**General**
Measurements (WxHxD) [mm]	368x310x140
Weight [kg]	5.2
Expected lifespan [years]	5

**Nominal properties (of battery configurations)**
	1 pack	2 packs	3 packs	4 packs	2 packs parallel	4 packs parallel	6 packs parallel	8 packs parallel
Nominal voltage [V]	115.2	230.4	345.6	460.8	115.2	230.4	345.6	460.8
Operating voltage [V]	100-131	200-262	300-393	400-524	100-131	200-262	300-393	400-524
Energy in total [kWh]	5.8	11.5	17.3	23	11.5	23	34.6	46.1
Standard power [kW]	2.9	5.8	8.7	11.6	2.9	5.8	8.7	11.6
Maximum power [kW]	4.0	8.0	12.0	16.0	4.0	8.0	12.0	16.0
Pollution degree	PD3
Overvoltage category (OVC)	II
Protection class	I
Maximum charging/discharging current [A]	25
Recommended charging/discharging current [A]	35
Usable charging/discharging cycles (at 90 % discharging depth DOD, at 25 °C)	6000 cycles

Note: With BMS, the master battery is no more required. Three-phase inverters can be connected to maximal 8 batteries.

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