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.
The wBMS-HX features direct compliance with IEC62619 and is pre-certified for Functional Safety, with a Compliance Report for ISO13849:1 Performance Level D issued by a certified third-party testing entity.
This BMS solution features an Ethernet interface with support for Modbus TCP for local device control (i.e. PLC, EMS, inverter). It also supports encrypted cloud connectivity, with integration with MQTT brokers and complete compatibility of the wBMS-Toolkit over internet.
Each BMU supports up to 48 CMUs. Multiple BMUs can be connected in parallel without additional hardware. The system automatically handles smart string connection / disconnection and provides a single control interface with EMS / Inverter.
The wBMS-HX family is available with two CMU options. The wBMS-HX CMU12 and the wBMS-HX CMU16. And these are also compatible with wBMS-MX BMU and wBMS-MX BMU Pro.
Safety
- Functional Safety ISO13849:1 Performance Level D
Reinforced isolation up to 1.500V (IEC60664).
- Internal extended diagnostics and safety-critical redundant systems.
- Cell and relay open-wire detection.
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.
Connectivity
Ethernet, 2x CAN bus, USB and Bluetooth.
Modbus TCP.
Cloud connectivity. MQTT broker compatibility and remote wBMS-Toolkit.
Compliance Report for Functional Safety ISO13849-1 Performance Level D
wBMS-MX BMU Pro and all the wBMS-HX lineup have been evaluated and tested by an independent certified European laboratory and feature a Compliance Report for ISO13849-1, Performance Level D. The Compliance Report is accompanied by a full Safety Manual documentation, allowing our customers to integrate our wBMS and design a fully Functional Safety compliant end product.
Our wBMS products are fully compliant for Functional Safety while keeping all their flexibility and parametrization features. The Functional Safety performance and compliance is not bound to custom firmware developments, or complex, costly and lengthy custom projects. Just integrate and configure the off-the-shelf BMS according to your requirements and to the Safety Manual, and you will have a fully compliant system.
Power supply | 15 – 36 Vdc. Independent input for contactor supply. |
Consumption | < 3,5 W (@ 24 Vdc). |
Isolation | 1.500 V reinforced isolation (IEC60664). |
Supported CMUs | Two CMU links. Up to 48 CMUs. Compatible with all wBMS-MX and wBMS-HX CMU models. |
Current sensing | Up to 4 external 0 – 5 Vdc hall current sensor. Accuracy < ± 0,1 mV. Support for dual-range, differential or redundant single-ended 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. Configuration of per-device customer certificates. Remote management and monitoring. Complete compatibility of wBMS-Toolkit over Internet. |
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 low-side switch. 1,5 A nominal, 2,5 A peak. Extended diagnostics and redundant high-side disconnection. 2x high-side outputs. Open load detection and overload protection. |
Other interfaces | Isolated USB 2.0. Bluetooth Low-Energy (BLE). |
High-voltage measurement | Included 1.500 Vdc voltage measurement. Direct support with wBMS-VIC. |
Isolation measurement | Direct support with wBMS-VIC. Support for third-party external CAN bus. |
Memory | Integrated redundant non-volatile memory: system configuration, maximeter and flags. MicroSD support (up to 32 GB). |
Parallelization | Up to 16 BMUs in parallel. Smart parallelization management without additional hardware. Multiple battery string management in each BMU. |
Dimensions | L180 x W125 x H18 mm. 5x M4 mounting holes. |
Operating temperature range | -40 to +85 ºC. |
Connectors | Molex MicroFit. |
Compliance | Functional Safety ISO13849:1 PLd (Compliance Report from certified third-party available). Fully compatible with IEC62619, including 2023/1542/EU. EMC: 2024/30/EU RoHS: 2011/65/EU |
Also compatible with wBMS-MX BMU and wBMS-MX BMU Pro.
Cell measurements (voltage & temperature) | Multiple cell chemistry. Extended internal redundancy and hardware integrity diagnostics. Open wire detection. |
Cell voltage | 5 – 12 cells. 0,1 – 4,5 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 | Configurable autonomous passive balancing strategy. 5 Ω per channel. |
Isolation | 1.500 V reinforced isolation (IEC60664). |
Consumption | Active: < 10 mA Sleep: < 10 µA |
Operating temperature range | -40 to +85 ºC |
Dimensions | L124 x W78 x H18 mm. 4x M4 mounting holes. |
Connectors | Cell voltages and temperatures: Molex MicroFit. CMU-link communications: Molex MicroFit and/or RJ45. |
Compliance | Functional Safety ISO13849:1 PLd (Compliance Report from certified third-party available). Fully compatible with IEC62619, including 2023/1542/EU. EMC: 2024/30/EU RoHS: 2011/65/EU |
Also compatible with wBMS-MX BMU and wBMS-MX BMU Pro.
Cell measurements (voltage & temperature) | Multiple cell chemistry. Extended internal redundancy and hardware integrity diagnostics. Open wire detection. |
Cell voltage | 5 – 16 cells. 0,1 – 4,5 Vdc. ± 1,8 mV cell voltage max total error. |
Cell temperature | Up to 5 channels. Configurable NTC. ± 1 ºC cell temperature max total error. |
Balancing | Configurable autonomous passive balancing strategy. 24 Ω per channel. |
Isolation | 1.500 V reinforced isolation (IEC60664). |
Consumption | Active: < 10 mA Sleep: < 10 µA |
Operating temperature range | -40 to +85 ºC |
Dimensions | L119 x W95 x H18 mm. 4x M4 mounting holes. |
Connectors | Cell voltages and temperatures: Molex MicroFit. CMU-link communications: Molex MicroFit and/or RJ45. |
Compliance | Functional Safety ISO13849:1 PLd (Compliance Report from certified third-party available). Fully compatible with IEC62619, including 2023/1542/EU. EMC: 2024/30/EU RoHS: 2011/65/EU |
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.
