Technical specifications
BMS Mini 2 is a miniature full-featured centralized BMS for high-capacity lithium-ion batteries. It has many communication interfaces, an ability to collect information during the entire battery lifetime and an integrated DC/DC converter.
Specifications
| Parameter | Value |
| Battery voltage, V | 14 to 78 |
Current consumption @48 V, mA (maximum): work (no load) standby |
30 0.2 |
| Number of cells | 6 to 18 |
| Cell balancing type | Passive |
| Cell balancing current, mA, @ 4.2 V | 220 |
| Cell voltage measurement error, V | 0.004 |
| Cell temperature measurement error, °С | 2 |
| Output voltage of the internal DC/DC converter, V | 12 ± 1 |
| Output current of the internal DC/DC converter, A (maximum) | 3 |
| Number of MOSFETs (to drive power contactors) | 4 |
| MOSFETs output voltage, V (maximum) | 100 |
| MOSFETs output current, A (maximum) | 5 |
| Number of discrete inputs (dry contact) | 4 |
| Number of discrete outputs | 4 |
| Discrete outputs voltage, V (typical) | 5 |
| Discrete outputs current, mA (maximum) | 100 |
| Type of the current sensor | Hall-Effect sensor, bidirectional, (LEM series: HASS, HTFS, DHAB) |
| Wired interfaces | 1xCAN / 1xRS-485 / 1xUSB |
| Wireless interfaces | Wi-Fi (optional) |
| Dimensions (length × width × height), mm | 140 × 117 × 17 |
| Weight, g | 240 ± 5 |
| Operating temperature range, °С | -40 to +85 |
Overall and mounting dimensions
Typical battery system
Typical battery system based on the BMS Mini 2 is shown on figure below.
Safety rules
The BMS can be connected to batteries with life-threatening and health-hazardous voltage levels. When working with high-voltage batteries, observe electrical safety regulations, use safety glasses, protective clothing, insulated tools, and appliances.