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n-BMS

Battery Management Systems

 
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    • UPDATED !
    Manufacturer: Lithium Balance A/S

    Compact High Power Battery Management

      • Up to 1000V and 2000A
      • Exceptional cost-to-performance ratio for high voltage applications
      • Multiple, compact Cell Monitoring Unit (CMU) variants to fit any battery design
      • Safety-rated key components
    Services
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    Product usually available on stock

    Delivery:  

    • ASK for "Just in time" delivery

    More questions?

    +39 02 3340 0846 or Contact us

    Questions?

    +39 02 3340 0846
    or Contact us

    Description

    The n-BMS is a revolutionary, scalable battery management system designed for high voltage applications. Featuring functionally safe design with key components such as Processor, ASIC and PSU carefully selected to meet functional safety at ASIL C level.

    Its CMU12 Compact cell monitoring unit (CMU) is compatible with both the n-BMS and the fully ISO 26262 certified n3-BMS, providing a convenient upgrade path for n-BMS users to an ISO 26262 certified system.

    The n-BMS CMU12 Compact can be configured with up to 32 CMU’s. Each CMU can monitor up to 12 cells in series and thus the n-BMS can monitor in total up to 384 cells in series. Each CMU features an extremely small footprint of 75 x 65 mm, providing an easy fit for various battery designs.

    Features

    Main Specifications

    • 12 voltage channels per cell monitoring unit (CMU)
    • Up to 384 cells in series
    • 12 temperature channels per CMU
    • 0 – 1000 V
    • Up to 2000A
    • 2 CAN ports
    • CREATOR configuration software for flexibility in battery design
    • Extremely compact CMU for easy design fit (65 x 75 mm)
    • Compatible CMU with the ISO 26262 ASIL C Certified n3-BMS

    Configurability and Control: The n-BMS can be configured through the licensed n-BMS CREATOR software. This powerful tool enables battery integrators to craft a unique battery design, tailoring the system specifically to their requirements.

    Safety First

    • Safety rated key components ensure the highest safety standards
    • Self-tests and redundancy in safety-critical measurement circuits provide peace of mind
    • Open circuit detection adds an extra layer of security

    Enhancing Battery Life

    • High-frequency sampling of current (100 mS) for optimal pulse detection
    • Intelligent dissipative balancing at 200mA per cell
    • Operational range from -40° to +85°C, accommodating a wide range of environments

    Peak Performance

    • Precise voltage measurement with ±1,6 mV accuracy at 25 °C at the individual cell level
    • Optimized low power consumption mode for efficiency
    • ±1 °C accuracy in temperature measurement for reliable monitoring
    • Advanced algorithms for State of Charge (SOC), State of Health (SOH), and State of Power (SOP) with OCV compensation

    User-Friendly Experience

    • Real-Time Clock (RTC) and logging for events, errors, and warnings
    • BMS Creator PC tool for easy system configuration
    • Optional current sensing capabilities (Hall effect or Shunt)
    • CAN UDS tool for comprehensive diagnostics and communication

    Master Control Unit Specifications

    Parameters Specifications
    Power supply 6-35 V
    Number of CMUs supported 1-32
    Number of cells in series for total system 384
    Range of high voltage measurement 0 - 1000 VDC
    Accuracy of high voltage measurement +/- 1 VDC
    Range of current measurement input Shunt +/- 150 mV
    Accuracy of current measurement input Shunt +/- 1.0 mV -40 - 85°C
    Range of current measurement input (hall effect sensor) 0.0 - 5.0 V, 0.0 - 2.5 V current in, 2.5 V to 5.0 V current out
    Accuracy of current measurement input (hall effect sensor) +/- 1.5 mV -40 to 85°C
    Accuracy of temperature (NTC) +/- 1°C -40 - 85°C
    Ground fault detection (leakage) levels 250/500/1000 Ω/V between GND and HV+/-
    Standby consumption < 8.5 mW at 12 V supply
    Active consumption < 3,5 W at 12 V supply
    Communication interface, master-slave isoSPI
    Supported CAN communication type CAN 2.0 A/B 11 bit and 29 bit IDs
    Supported CAN speeds 125, 250, 500, 1000 kbit/sec
    Number of CAN ports 2, one isolated CAN, one non-isolated CAN
    External GPIOs 16 (active low)
    Charger control interfaces CAN

    Cell Monitoring Unit Specifications

    Parameters Specifications
    Number of cells per unit 4-12 cells (minimum 12 V to power the CMU)
    Detectable cell voltage 0-5 VDC
    Number of temperature sensors per unit 4 (NTC based)
    Cell balancing topology Dissipative
    Cell balancing current 200 mA at cell voltage 4.2 V
    Cell voltage typical sampling time 100 ms
    Accuracy of single cell voltage +/- 1.6 mV at 25°C
    Range of temperature measurements -40 to 85°C
    Accuracy of cell temperature (NTC) +/- 2°C -40 to 0°C | +/- 1°C 0 - 40°C | +/- 2°C 40 - 85°C
    Communication interface isoSPI (max. 5m shielded cable between boards)
    Standby consumption < 460 μW (with 12 cells at 3.2 V)
    Active consumption < 690 mW (with 12 cells at 3.2 V)
    Patents ZT 200780048774, EP 0781788.6, US 8.350.529

    Documentation