wBMS-HX
The Wattius wBMS-HX is a high-performance BMS solution for high-voltage large-scale battery energy storage. The system has been designed for applications up to 1.500 V and provides reinforced isolation for all external interfaces according to IEC60664.
This BMS solution features an Ethernet interface with support for Modbus TCP for local device control (i.e. PLC, EMS, inverter). It also supports cloud connectivity, with integration with MQTT brokers and complete compatibility of the wBMS-Toolkit over internet.
Each BMU includes two CMU (Cell Monitoring Unit) links, supporting up to 48 CMUs. Up to 16 BMUs can be connected in parallel via CAN bus without additional hardware. Proprieratry string management algorithms automatically control up to 16 battery strings, and provide a single control interface for EMS / Inverter.
The wBMS-HX BMU V4 features multiple isolated and non-isolated interfaces, including two CAN bus, USB, Ethernet and analog and digital I/O, and even Bluetooth. Finally, this BMU integrates a battery high-voltage sensor for up to 1.500V.
The wBMS-HX family is available with two CMU options. The wBMS-HX CMU12 and the wBMS-HX CMU16.
Connectivity
Ethernet, 2x CAN bus, USB and Bluetooth.
Modbus TCP.
Cloud connectivity. MQTT broker compatibility and remote wBMS-Toolkit.
Performance
- Up to 48 CMU12s for a single BMU.
Up to 16 BMU automatic parallelization. Autonomous multi-string management without additional hardware.
Multiple isolated and non-isolated I/O.
- High-precision SoC algorithm.
Support for dual-range hall and CAN bus current sensors.
- EMC CE Class A & B compatible.
Safety
Reinforced isolation up to 1.500V (IEC60664).
- Internal extended diagnostics and safety-critical redundant systems.
- Cell and relay open-wire detection.
| Power Supply | 15 – 36 Vdc, Typ. 24 Vdc. Up to 8A for external output supply. |
| Maximum system voltage | IEC60664, reinforced isolation: DC side: 1.500 Vdc. AC side: 800 Vac, CATIII. |
| Supported CMUs | Two CMU links. Up to 48 CMUs. Support for Wattius 12, 16 and 18-cell CMUs. |
| Current sensing | External 0 – 5 Vdc hall current sensor. < ± 0,1 mV. Support for dual-range hall current sensors. Support for external CAN bus current sensors. |
| CAN Interface | 2x Isolated CAN bus 2.0 A/B (Up to 1Mbps). Configurable termination resistor with switch. |
| Ethernet | Up to 100Mbps. Compatible with Modbus TCP for local device control (i.e. PLC, EMS, Inverter). |
| Cloud connectivity | Cloud connectivity, with direct integration to encrypted MQTT broker. Remote management and monitoring. Complete compatibility of wBMS-Toolkit over Internet. |
| Other interfaces | Mini USB 2.0 Bluetooth 5.0 Low Energy. |
| Isolated I/O | 3x dry-contact inputs. 1x 24V input. 1x external NTC temperature sensor. 3x 24V output (~ 1W each). |
| Non-Isolated I/O | 3x external NTC temperature sensor. 3x analog inputs. 0 – 36 Vdc. 5x dry-contact inputs. 8x outputs (up to 1,5A each). Low-side. Open-wire and malfunction diagnostics. 2x outputs. High-side. |
| High-voltage measurement | Included 1.500 Vdc voltage measurement. |
| Isolation measurement | Support for external CAN bus and digital isolation measurement devices. |
| Memory | Integrated redundant EEPROM to store system configuration and maximeter. MicroSD support (up to 16 GB). MicroSDHC Class 10 is recommended. |
| Operating temperature range | -40 to +85 ºC |
| Parallelization | Up to 16 devices in parallel without external hardware. |
Cell measurements (voltage & temperature) | Multiple cell chemistry and supercapacitors. Extended internal redundancy and hardware integrity diagnostics. Open wire detection. |
| Cell voltage | 5 – 12 cells. 0 – 5 Vdc. ± 1,5 mV cell voltage max total error. |
| Cell temperature | Up to 5 channels. Configurable NTC. ± 1 ºC cell temperature max total error. |
| Balancing | Autonomous. Configurable. Up to 1.000 mA per channel. |
| Operating temperature range | -40 to +85 ºC |
| Dimensions | 78 x 124 mm |
Cell measurements (voltage & temperature) | Multiple cell chemistry and supercapacitors. Extended internal redundancy and hardware integrity diagnostics. Open wire detection. |
| Cell voltage | 5 – 16 cells. 0 – 5 Vdc. ± 1,5 mV cell voltage max total error. |
| Cell temperature | Up to 5 channels. Configurable NTC. ± 1 ºC cell temperature max total error. |
| Balancing | Autonomous. Configurable. Up to 300 mA per channel. |
| Operating temperature range | -40 to +85 ºC |
| Dimensions | 95 x 119 mm |
All wBMS models are compatible with the same wBMS-Toolkit, a free PC software that provides real-time monitoring of all BMS measurements, as well as configuration of thousands of parameters in a flexible and intuitive way.
Connection between wBMS-Toolkit and the devices can be established through USB, CAN bus, Ethernet or even Bluetooth.
