n-BMSTM
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.
Specifications
See specifications of Master Control Unit (MCU)
| PARAMETERS | SPECIFICATIONS |
|---|---|
| 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 |
See specifications of Cell Monitoring Unit (CMU) – 12 temp channels
| PARAMETERS | SPECIFICATIONS |
|---|---|
| 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 |
See specifications of Cell Monitoring Unit (CMU) – 4 temp channels
| 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 – 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 |
Related Products
Application software
- Configuration software
- The n-BMS CREATOR software enables the battery designer to set up the BMS configuration for their specific application and selected battery chemistry.
- USB/CAN adapter
- For the n-BMS CREATOR software an adapter is required for USB to CAN conversion, which allows the connection from the BMS to the PC.
Charger
LiTHIUM BALANCE offers a range of chargers which are both air-cooled and water cooled. Chargers are available in 1,8 kW, 3,3 kW and 6,6 kW capacities.
Wire harness
- Cell monitoring wire harness
- LiTHIUM BALANCE provides tailor-made cell monitoring and temperature wire harnesses for all n-BMS products.
- Internal communication wire
- A range of standard-length interconnecting cables and wires are also available for the n-BMS products. The connection cables are based on IsoSPI protocol.
- External communication wire
- A variety of different I/O cables are available for all n-BMS products for the connection to shunts, VCU, relays, CAN devices and other peripherals.
Download wire harness datasheets
⇣ MCU wire harness datasheet
⇣ CMU wire harness datasheet
Current measurement
- Shunts
- For all s-BMS products, a range of standard, compact, and high precision shunts are offered. The shunts can be selected to fit almost any application specific currents.
- HAL effect sensor
- For all n-BMS products a range of standard high precision HAL effect sensors are offered. The HAL sensor can be selected to fit almost any application specific currents as well.
Other accessories
- Fuses
- For battery systems, a further safety layer is configured using fuses. LiTHIUM BALANCE offers several fuses with ratings relevant for large format batteries.
- Displays
- LiTHIUM BALANCE offers a number of standard displays (based on CAN) that can be connected seamlessly to the n-BMS.
- Relays
- For all n-BMS products a range of standard, robust relays are offered. The relays can be selected to fit almost any application specific currents and voltage levels.
Services
- Application support
- In order to ensure a smooth integration of the n-BMS to the system, we offer application support. In the software license 5 hours of free support is included. Application support beyond that is offered on an hourly basis
- Training
- For a comprehensive introduction about the possibilities of our n-BMS, Li-ion technology, and battery integration, LiTHIUM BALANCE offers trainings tailored specifically to your needs.
- Remote surveillance
- For our n-BMS, a modem-based surveillance system can be connected to the BMS via CAN. The data is stored on a secure server and can be accessed from anywhere.
