wBMS-MX Pro

The Wattius wBMS-MX BMU Pro is an upgraded Battery Monitoring Unit option compatible with all wBMS-MX and wBMS-HX CMUs.

The wBMS-MX BMU Pro 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.

The wBMS-MX BMU Pro features two CAN bus interfaces, as well as Bluetooth and USB. It also improves current measurement accuracy, featuring up to 4 hall sensors inputs, providing support for dual-range current sensors.

Each BMU supports up to 48 CMUs, compatible with all Wattius wBMS-MX and wBMS-HX CMU models. 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.

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Safety
  • Functional Safety ISO13849:1 Performance Level D
  • Internal diagnostics and safety-critical redundant systems.
  • Cell and relay open-wire detection.
Performance
  • Compatibility with all wBMS-MX and wBMS-HX CMU models.
  • Up to 48 CMUs per BMU.
  • Autonomous parallelization of multiple battery strings without additional hardware.
  • Multiple battery string in each BMU.
  • Up to 16 BMU automatic parallelization.
  • Support for external isolation monitors and HV sensors.
  • Support for dual-range hall sensors.
Connectivity
  • 2x CANbus, Bluetooth & USB.
  • Real-Time logging of events, alarms and operation data to microSD card.
  • Monitoring, configuration & analysis with free wBMS-Toolkit PC software.
 

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

9 – 36 Vdc.

Independent input for contactor supply.

Consumption

Active: < 1 W

Deep sleep: < 35 mW.

Supported CMUs

48 CMU per each BMU.

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 CAN bus 2.0 A/B (Up to 1Mb/s). Referenced to external power supply.

Configurable termination resistor with switch.

Other interfaces

Mini USB 2.0.

Bluetooth 5.0 Low Energy.

General input

3x analog / digital (configurable) signal up to 36 Vdc.

3x dry contact digital input.

Configurable to multiple functions (ignition key, HVIL, relay feedback etc.).

3x external NTCs.

General output

Maximum total output 4 A.

6x 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.

Configurable to multiple functions (contactor, precharge, alarm, coolong, etc.).

High-voltage measurement

Direct support with wBMS-VIC. Support for third-party external CAN bus.

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

L100 x W90 x H16 mm.

4x 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.

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.

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