HSU Series

Hybrid battery current sensor combining Shunt and Hall technologies

HSU – Battery Current sensors for EVs and PHEVs

The Hybrid Supervising Unit (HSU) is a hybrid battery current sensor designed for both DC and AC measurement of battery packs in electric and hybrid vehicles. It features two current measurement channels: one using the shunt effect and the other using the Hall effect.

Both channels support a primary current measuring range of up to ±2000 A. 

The shunt effect channel consists of a PCBA mounted on a shunt resistor, with an integrated thermistor and connector, while the open loop transducer is using a Hall effect integrated circuit.

The HSU offers high insulation levels, excellent accuracy, and is designed for primary fastening mounting. 

These features make it ideal for automotive applications.

HSU – Features and benefits

HSU hybrid battery current sensor

Main characteristics

  • Open Loop transducer uses the Hall effect channel and Shunt channel
  • High insulation level
  • Unipolar +5 V DC power supply for HALL effect
  • Primary current measuring range up to ±2000 A (10 s) both Shunt and Hall
  • Maximum RMS primary admissible current: defined by the busbar, the magnetic core or ASIC T < +125 °C
  • Operating temperature range: −40 °C < T < +125 °C
  • Output voltage: fully ratio-metric (in sensitivity and offset) for Hall effect channel.

Benefits

  • Excellent accuracy
  • Very good linearity
  • Very low thermal offset drift
  • Very low thermal sensitivity drift

Typical applications

HSU current sensors are used in various applications within the automotive sector. Examples include:

VIDEO

Introducing HSU

LEM HSU – Download & Technical Characteristic

Product

Document

Primary current range

Supply range

Accuracy

Bandwidth

Sensitivity

Op. Temperature

Mounting

HSU03Download
3D
2000 A0 - 5V5 %35 Hz1 mV/A-40 to 125°COn primary fastening

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