2 July 2025
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.
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
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:
- Battery management
- EV, Hybrid and utility vehicles