1. BMS1201 Introduction
Introducing the LiBat™ BMS1201, an ultra-compact battery management system meticulously crafted for small and compact battery applications. This fully digital, standalone device is designed for hassle-free integration into 5S-12S battery configurations, offering a ready-to-use solution with minimal user interaction required once system parameters are set. The BMS1201 stands as a comprehensive electronic control and management solution for a variety of battery applications, eliminating the need for additional devices in the overall battery system. Its diminutive size belies its powerful capabilities, making it an ideal choice for those seeking efficient and autonomous battery control.
Key Features:
- Ultra Small Design 95mm x 43.5mm
- Compact, plug-and-play BMS
- 5S-12S cell measurement with 0.1mV resolution
- 30A discharge, 10A charge current with FET controlled protection
- Adjustable passive balancing current
- Deep sleep and low power consumption Mode
- UART communication interface
- Built-in current sensor
- 3 external, 2 internal NTC
Table.1.1: BMS1201 Technical Specifications
| PARAMETER | SPECIFICATIONS |
|---|---|
| Power Source | Self powered. No external power need. |
| Power Consumption | Power Down: ~0.050 mW , RUN State: ~820mW |
| Wake Up Trigger | User Button / Charger Connection / Load Connection |
| LEDs | Power, Run/Error Status |
| I/O Capacity (optional) | 2x Relay outputs, 1x User button with led |
| Precharge (optional) | Configurable Software Timer |
| DFU Mode | Embedded bootloader for firmware upgrades. |
| Digital Interface | 1x UART |
| Digital Interface (optional) | 1x Half Duplex RS485, 1x RS232 |
| Communication Protocols | LiBat COM, JSON |
| Communication Protocols (optional) | Modbus RTU |
| Current Sensor | On board, up to 30A continuos, 40A Peak |
| Charge Current | Up to 10A |
| Discharge Current | Up to 40A |
| Number of cells | Up to 12 Cells. Minimum 15 V |
| 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 | 420mA @ 4.2Vdc cell voltage |
| Balance Power | 2W max. per cell |
| Temperature Sensor Type | NTC, 10KΩ @ 25 °C |
| Temperature Sensor Accuracy | ±1.5 °C (depends on sensor sensitivity) |
| Number of Temperature Sensor | Up to 3 external sensor probes, 2 x On board NTC |
| Operating Temperature | -20 °C to +70 °C (-4° F to +158° F) |
| Relative Humidity | 5% to 95% (non-condensing) |
| Dimensions and Weight | 95 mm X 43.5 mm X 12.31 mm, 100g |