Battery Power Measurement Board

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A scalable kit for high voltage battery management and safety monitoring


The STW.pmb (Power Measurement Board) is an intelligent sensor for the accurate measurement of voltage and current in DC currents. The shunt (resistance)-based system is connected via CAN to the BMS with a redundant safety circuit, whereby the state of charge (SOC) of the lithium-ion battery is accurately determined.

Key Features

  • For automotive high voltage batteries
  • Supports NMC, LFP and LTO cells
  • Support for parallel batteries
  • Current and high voltage sensors
  • Scalable solution including hardware and software
  • SoC, SoH and SoF determination


  • High voltage measurement range: 0 V ... 800 V
  • High voltage measurement accuracy offset: 0.1 V, gain 1%
  • Current measurement range: ±2000 A
  • Current measurement accuracy offset: 0.2 A


  • Length: 95 mm
  • Width: 61 mm
  • Height: 15 mm

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