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Manufacturer: Sensata Technologies

Next generation scalable BMS for high voltage applications

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Description


The n-BMS is the next generation scalable BMS for high voltage applications. It is a distributed system in which the Management Control Unit (MCU) communicates with up to 32 Cell Monitoring Units (CMU).

Each CMU manages up to 12 voltage channels in series and thus, the n-BMS is rated to manage up to 1000V. The CMU’s come in 2 different variants from 2 to 12 temperature channels.
The n-BMS can be configured through the licensed n-BMS CREATOR software, which enables the battery integrator to create a unique battery design and tailor it specifically for their needs.

MASTER CONTROL UNIT (MCU)

Power supply: 6-35 V
Number of CMU’s 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 – 5.0 V current out
Accuracy of current measurement input (Hall effect sensor): ±1.5 mV -40 – 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 12V supply
Active Consumption: <3.5 W at 12 V supply
Communication interface, master-slave: isoSPI
Supported CAN communication type: CAN 2.0A/B 11 bit and 29 bit IDs
Supported CAN speeds: 125, 250, 500, 1k 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 12 TEMP CHANNELS

Number of cells per unit: 3-12 Cells (minimum 11 V, to power the CMU)
Detectable cell voltage: 0 – 5 VDC
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: ±1.5 mV from -40 to +85 °C
Range of Temperature measurements: -40 to +125 °C
Accuracy of cell temperature (NTC): ±1 °C -40 – 85 °C
Communication interface: isoSPI (Max. 5 m shielded cable between boards)
Standby Consumption: <269µW (with 12 cells @ 3,2 V)
Active Consumption: <326 mW (with 12 cells @ 3,2 V)
Patents: ZT 200780048774, EP 0781788.6, US 8.350.529

CELL MONITORING UNIT 4 TEMP CHANNELS

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 – 0 °C | ±1 °C 0 – 40 °C | ±2 °C 40 – 85 °C
Communication interface: isoSPI (Max. 5 m shielded cable between boards)
Standby Consumption: ~460 μW (12 μA) – with 12 cells @ 3,2 V
Active Consumption: ~690 mW (18 mA) – with 12 cells @ 3,2 V
Patents: ZT 200780048774, EP 0781788.6, US 8.350.529

Product ordering number

  • MCU: 100800
  • CMU – 12 temp channels: 100801
  • CMU – 4 temp channels: 100809
  • CMU15 – 15 voltage channels for up to 15 cells / CMU & 8 temp channels: 100820
  • n-BMS CREATOR: 100840.99
  • n-BMS SERVICE: 100841.99

Documentation


Via Magenta, 77/16A
20017 Rho (MI) - Italy
Phone +39 02 3340 0846
VAT: IT04126380155
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Via Magenta, 77/16A
Rho 20017, Italy
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+39 02 3340 0846


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