BMC
CMC
09/26/2018

BFFT Develops a Battery Management System Platform

The BFFT department of Energy Storage & Electrification has developed a decentralized battery management system – a platform consisting of a Battery Management Controller, BMC for short, and associated Cell Module Controllers, CMC for short.

The department’s capabilities range from conceptualization, development, construction and sample set-ups, right through to validation tests. Developed by BFFT, based on many years of experience with energy storage systems, the BMS platform is a reliable solution for prototypes and micro-series applications.
This battery management system, developed for lithium-ion batteries, is characterized by its high degree of flexibility. The architecture of these steering systems enables them to be used in battery projects with required voltage levels ranging from 80 V to 800 V.
The BMC, as the master, communicates with the CMCs via a proprietary BUS-interface. The CMCs monitor the cell temperature and voltage, enabling passive balancing up to 200 mA. Insulation monitoring, as well as total voltage and current measurements, are performed by external peripherals.
Assembly options allow short-term adaptation to project requirements, such as, for example, the number of driver stages and cell measurements per CMC. Parameters can be adapted to the BMC via the integrated CAN(FD) interface. With the help of a boot-loader, a new software version can be flashed via CAN.
All parts and components used are automotive-specific. This results in various fields of application, such as motor-sports, industrial vehicles, stationary applications in battery prototypes, as well as exhibition & show applications. The BMS is delivered ready for use, after prior testing under laboratory conditions and QS reporting.

Technical specifications:

MASTER (BMC)

Power supply:

12 V

Power consumption:

150 mA (active), 50 μA (sleep mode)

Battery voltage:

80 V to 800 V (nominal)

Size:

180 * 120 * 27 mm

Weight:

150 g (full equipment set)

Driver stages:

7

External sensor supply:

2

PWM Inputs:

2

Wake up:

LDT, CAN, KL15

Communication:

4 * CAN-FD, 1 * TPL (CMCs)

External temperature measurements:

8

 

Slave (CMC)

Power supply:

9.6 V – 61.6 V (off cells)

Power consumption:

(off cells)
Power15 mA (active at 52 V), 70 μA (Sleep mode at 52 V)

Size:

57 * 80 * 16 mm

Weight:

30 g (full configuration)

Passive balancing:

200 m
All measurement channels:

7 – 14

Cell voltage measurement:

0 V to 4,85 V

External temperature measurements:

5

EEPROM Memory:

8 kBit

Communication cluster:

15

Hot plug capability

Should you have any questions relating to BFFT’s internal development projects or products, you may contact us via anfragen@bfft.de.

 

 

 

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