Battery Monitoring System

4kV Insulation and CAN Interface
Battery monitoring system with independent power supply and galvanically insulated design.

Product Description

The Battery sensing and monitoring system consists of three sensors: (i) current sensor, (ii) voltage sensor, and (iii) temperature sensor. The three sensor signals are read by analog-to-digital converters (ADCs), processed by a programmable STM32 microcontroller, and provided at the output via the CAN interface. A particular feature of the product is its independent power supply and galvanically insulated design. Therefore the device operates directly with 12V DC and can be attached on both high-side and low-side of the high voltage (HV) battery system.

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Fact Sheet: Battery Sensing Unit 2.0

Features

  • Multisensor system (current, voltage, temperature)
  • Galvanically insulated design
  • High-side and low-side of HV battery
  • Contactless Melexis 91208 Hall sensor

Applications

  • Battery monitoring, e-mobility
  • State-of-charge, state-of-health
  • Prototyping, development, test platform
  • Functional safety

Characteristics

Parameter Typical Value Unit
Primary input current range ±5…±500 A
Voltage measurement range ±5…±800 V
Maximum power 60 W
Measurement accuracy 1.0 %
Operation temperature range –50 … 150 °C
Supply voltage 12 V
CAN interface refresh time 1.0 ms