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 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.