BAU (Bank-Level Management)
The BCU manages the battery rack and is typically installed in the high-voltage control box. It measures rack voltage, current and insulation resistance, calculates SOC and SOH, and provides fault diagnosis and protection. CAN, daisy-chain, RS485 and Ethernet interfaces enable communication with the BMU, BAU, PCS and EMS.
Product Specifications
| Parameter | Description |
| Processor | Quad-core 64-bit Cortex-A55 / 2.0 GHz |
| Memory | 2 GB LPDDR4 |
| Operating System | Linux |
| Display | 10.1" capacitive touchscreen, resolution 1280×800 |
| Communication Protocols | Modbus RTU, Modbus TCP, IEC104, IEC61850 |
| Battery Management Capability | Up to 500 series × 60 clusters |
| Interfaces | |
| — CAN | 3 isolated channels, rate 250k/500 kbps |
| — RS485 | 9 isolated channels, rate 9600–57600 bps |
| — DI | 18 channels (7 active-high, 11 active-low) |
| — Dry contact output | 16 channels, max 32 V, max 500 mA |
| — High-side output | 4 channels, max 24 V, max 500 mA |
| — Ethernet | 4 ports (2 Gigabit, 2 Fast Ethernet) |
| — TYPE-C | 1 |
| — USB | 3 ports; read/write speed depends on the USB drive, typ. 5 MB/s |
| — TF | 1 TF slot; read/write speed depends on the TF card, typ. 3 MB/s |
| — Wi-Fi | 1 |
| — HDMI | 1 |
| — 4G | 1 (domestic and global roaming supported) |
| Environment | |
| — Supply voltage | DC 12–32 V |
| — Power consumption | <10 W |
| — Operating temperature | −20 ℃ ~ 65 ℃ |
| — Storage temperature | −40 ℃ ~ 85 ℃ |
| — Relative humidity | 5%–95%, non-condensing |
| — Altitude | <4000 m |
| Enclosure | |
| — Dimensions | Exterior: 288 mm × 190 mm × 43 mm; Cutout: 266 mm × 179 mm |
| — Material | ABS+PC, black fine-textured matte finish |
| — Flammability rating | UL94-V0 |
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