1. BMS3610 Introduction
LiBat™ BMS3610 is a high cell-count battery management system master engineered for demanding industrial battery systems. It is built on the BMS1820 and measures two strings of up to 18 cells on the same board, so it covers 5S-36S packs on its own: cells 1 to 18 are Module ID#0 and cells 19 to 36 are Module ID#1. It drives up to 8 BMS1802 or BMS1202 slave modules over an isolated daisy chain and talks to the system over galvanically isolated CAN Bus, RS485, RS232 and I/O. Powered from 12V or from the pack, it adapts to high voltage, high power and high energy applications through external electrical components such as contactors and current sensors. With four automotive-grade high-side switches for mini relays and a relay output, the BMS3610 delivers flexible control and, once configured with the correct system parameters, operates seamlessly without the need for ongoing user interaction.
Key Features:
- Built in 5S - 36S cell measurement in two modules of up to 18 cells, with 0.1mV resolution
- Up to 600mA adjustable passive balancing current
- Wide input supply range (12V - 80V), 12V or battery powered
- Isolated 1 x CANBus 2.0b, 1 x RS232, 1 x RS485 communication
- Cloud connection and OTA firmware updates with an optional extension board (connector 12)
- Advanced I/O: 3 isolated logic inputs, 2 isolated logic outputs, 4 automotive high-side switches, 1 relay output
- Dual channel external current measurement
- Up to 10 external NTC temperature probes (5 per module), 2 on-board NTCs
- Standalone, Master and Multi-Master operating modes
- Up to 8 slave modules (BMS1802 / BMS1202) via isolated daisy-chain
- Expandable up to 180 cells total with slave module connection
- Low power consumption when shut down
Table.1.1: BMS3610 Technical Specifications
| PARAMETER | SPECIFICATIONS |
|---|---|
| Power Source | Pack powered (VIN+, 12-80Vdc, from a pack tap on packs above 80V) or external 12V supply (12Vin) |
| Power Consumption | Power Down: ~0.05 mW , RUN State: ~1615mW |
| Wake Up Trigger | User Button |
| LEDs | Power, Run/Error Status |
| Relays | 1x SPDT Relay Output |
| High Side Switch Outputs | 4x Automotive High-Side Switches for mini relays (12V internal or external supply on Vext) |
| Logic Inputs | 3x Isolated Logic Inputs |
| Logic Outputs | 2x Isolated TTL Outputs |
| RTC | Onboard RTC with backup battery |
| Slave Communication | Daisy-chain, 1x 1.5kV Isolated port (RJ45 or 4-pin connector) |
| Slave Module Support | Up to 8 slaves (BMS1802 / BMS1202) |
| Precharge | Configurable: disabled, time only, or time and current |
| DFU Mode | Embedded bootloader for firmware upgrades. |
| Digital Interface-1 | 1x Isolated Half Duplex RS485 |
| Digital Interface-2 | 1x Isolated RS232 |
| Digital Interface-3 | 1x Isolated CANBus 2.0b |
| Communication Protocols | LiBat standard protocols, JSON, Modbus RTU |
| Current Sensor | Compatible with 5V external current sensors (dual channel) |
| Operating Modes | Standalone, Master, Multi-Master |
| Number of cells | Up to 36 Cells (5S - 36S) on the board, as Module ID#0 (cells 1-18) and Module ID#1 (cells 19-36) |
| Cell Type | Any battery cell in voltage range |
| Minimum cell voltage | 250 mV |
| Maximum cell voltage | 4500 mV |
| Accuracy of Cell Voltage Measurement | ±1.6mV typical, < ±8.3mV max. |
| Balance Method | Passive Balancing |
| Balance Current | Up to 600mA @ 4.2Vdc cell voltage |
| Temperature Sensor Type | NTC, 10KΩ @ 25 °C |
| Temperature Sensor Accuracy | ±1.5 °C (depends on sensor sensitivity) |
| Number of Temperature Sensor | Up to 10 external sensor probes (5 per module), 2 x On board NTC |
| Operating Temperature | -20 °C to +70 °C (-4° F to +158° F) |
| Relative Humidity | 5% to 95% (non-condensing) |
| Expandability | Up to 180 cells total with slave modules |
| Dimensions | 180 mm X 110 mm X 18.6 mm |