- Home
- Companies
- Wattius Battery Solutions
- Products
- Wattius - Model wBMS-R Series - Battery ...
Wattius - Model wBMS-R Series -Battery Management System
The Wattius wBMS-R series offers a compact solution for managing lithium battery cells in configurations of up to 32 cells. This battery management system is particularly well-suited for applications requiring precise monitoring and balancing, with a total maximum voltage measurement error of just ±2 mV. Available in two models, wBMS-R24 and wBMS-R32, it supports up to 24 and 32 cells, respectively. The system excels in connectivity, offering CAN bus, Bluetooth, and USB interfaces, and is capable of real-time data logging via a microSD card. A standout feature is its ability to connect multiple units in parallel without additional hardware, simplifying the management of extensive battery systems. Safety and diagnostics are enhanced through features like open wire detection and integrated hardware and software checks. It can also control up to six power contactors and calculate parameters like State of Charge (SoC) and State of Health (SoH).
The Wattius wBMS-R lineup is a compact Battery Management System developed to work with up to 32-cell lithium batteries while safely providing extended isolated interface possibilities.
Two models are available, wBMS-R24 for up to 24 cells, and wBMS-R32 for up to 32 cells. Monitoring and balancing with total maximum voltage measurement error of ± 2 mV for the entire range. It features state-of-the-art low power mode as well as integrated hardware and software diagnostics.
Multiple wBMS-R units can be connected in parallel without additional hardware. The system automatically handles string connection and provides a single control interface with the inverter / charger.
The wBMS-R protects the battery by driving up to 6 power contactors, calculates advanced parameters such as SoC and SoH and features multiple interface possibilities such as CAN bus, Bluetooth, and USB.
Connectivity
-
CANbus, Bluetooth & USB.
-
Real-Time logging of events, alarms and operation data to microSD card.
-
Monitoring, configuration & analysis with free wBMS-Toolkit PC software.
Performance
- Up to 32 cell measurement with ± 2 mV max. error.
- Ultra low power mode (< 35 mW).
- High-precision SoC algorithm.
- Up to 300mA autonomous balancing.
- EMC CE Class A & B compatible.
Safety
- Internal diagnostics and safety-critical redundant systems.
- Cell and relay open-wire detection.
- Power Supply :
- 10 – 36 Vdc
- < 15 mW in deep sleep mode
- Independent input for output supply
- Cell measurements (voltage & temperature):
- Multiple cell chemistry and supercapacitors.
- Extended internal redundancy and hardware integrity diagnostics.
- Open wire detection.
- Cell voltage :
- 5 – 24 cells. 0 – 5 Vdc.
- ± 1,5 mV cell voltage max total error.
- Cell temperature :
- Up to 6 channels. Configurable NTC 10 kΩ.
- ± 1 ºC cell temperature max total error.
- Balancing : Autonomous. Configurable. Up to 300 mA per channel.
- Current sensing : External 0 – 5 Vdc hall current sensor. < ± 0,1 mV.
- CAN Interface :
- 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 :
- 2x analog / digital (configurable) signal up to 36 Vdc.
- 4x dry contact digital input.
- Configurable to multiple functions (ignition key, HVIL, relay feedback etc.).
- General Output :
- 6x independent channels.
- External supply voltage. Maximum total output 4 A. External fuse recommended.
- Channel 1-4: 2 A nominal, 4 A peak per channel.
- Channel 5-6: 1 A nominal, 2 A peak per channel.
- Adjustable PWM @ 10 kHz max.
- Open circuit, short-to-battery and short-to-ground detection.
- Memory :
- Integrated redundant EEPROM to store system configuration and maximeter.
- MicroSD support (up to 32 GB). MicroSDHC Class 10 is recommended.
- Operating temperature range : -40 to +85 ºC
- Parallelization :
- Up to 16 devices in parallel without external hardware.
- Dimensions : 70 x 150 mm