1. Technical specifications
Technical specifications
The BMS Main 3 device is a modular battery management system (BMS) controller and performs the following functions:
- collection of information about the voltage and temperature of battery cells from BMS Logic devices;
- measurement of current through the battery;
- battery protection by opening the charge and discharge circuits in case of overcharge, deep discharge, short circuit, overheating, overcooling of the battery and under other conditions;
- determination of the battery state (state of charge, state of health, effective capacity, internal cell resistance, etc.);
- battery cell balancing control;
- communication with other devices (charging station, display panels, vehicle controller, etc.).
The BMS Main 3 device is flexibly configured and can work with various types of lithium-ion batteries: LFP (LiFePO4 and LiFeYPO4), LCO (LiCoO2), LMO (LiMn2O4), NMC (LiNiMnCoO2), NCA (LiNiCoAlO2), LTO (Li4Ti5O12), etc.
Specifications
| Parameter | Value |
| Power supply | |
| Supply voltage, V | 9 to 32 |
| Current consumption at supply voltage 12 V, mA, max | 100 |
| Scalability | |
| Number of connected BMS Logic devices, max | 40 |
| Number of controlled cells, max | 720 |
| Controls | |
| Number of programmable switches for contactors (9-32V, 2.5A) | 6 |
| Number of programmable discrete inputs (dry contact) | 6 |
| Number of programmable discrete inputs 9-32V | 2 |
| Number of programmable discrete outputs (+5V, total 200mA) | 4 |
| Sensors | |
| Number of connected current sensors (two signal lines for each sensor) | 3 |
Error in measuring signals from current sensors, V, max At ambient temperature 25 ± 5 ºС | ± 0.001 |
| Current sensor types | Bidirectional with 5V supply voltage (LEM series HASS, HTFS, DHAB or analogues) |
| Number of HV measurement inputs (two signal lines on each input) | 2 |
| High voltage measurement range, V | 10 ÷ 1000 |
| High voltage measurement error, V, max | ± 2 |
| Number of connected external temperature sensors (100 kOhm NTC-thermistors) | 2 |
Temperature measurement error using external temperature sensors, ºС, max In the measurement range from -20 to +85 ºС | ± 2 |
| Humidity measurement error using a built-in humidity sensor, %, max | ± 10 |
| Current in the HVIL, mA, typical | 25 |
| Total resistance in the HVIL, Ohm, max | 200 |
| Interfaces | |
| Number of USB interfaces | 1 |
| USB speed, Mbit/s | 12 |
| Number of CAN interfaces | 3 |
| CAN speed, kbit/s | 125, 250 (by default), 500, 1000 |
| Number of RS-485 interfaces | 2 |
| RS-485 speed, bit/s | 600, 1200, 2400, 4800, 9600 (by default), 19200, 38400, 57600, 115200 |
| Output voltage of CAN power supply, V | 5.0 ± 0.5 |
| Output current of CAN power supply, mA, max | 400 |
| Connecting an additional expansion interface module | BMS Wi-Fi, BMS GSM, BMS LANmodule |
| Headers P1, P6-P9 type | Molex series Mini-Fit |
| Headers P11-P15 type | Molex series Micro-Fit |
| Galvanic isolation | |
Rated insulation voltage, VRMS, min Conditions: duration 1 minute, AC 50 Hz, 1) between connectors of CAN1, RS-485-1, discrete inputs/outputs interfaces and device power circuits, 2) between connectors of CAN1, RS-485-1, discrete inputs/outputs interfaces and high voltage measurement circuits, 3) between the device power supply circuits and the high voltage measurement circuits | 3500 |
| Weight and overall dimensions | |
| Overall dimensions (length × weight × height), mm | 200 × 120 × 12 |
| Weight, g, max | 150 ± 10 |
| Operating conditions | |
| Operating temperature range, °С | -40 to +85 |
Overall and mounting dimensions
