Designed for EVs and HEVs, these current sensors deliver accurate, isolated measurement for batteries, motors, and safety critical protection circuits.
As electric and hybrid vehicles adopt higher voltage architectures, accurate and isolated current sensing has become essential for battery management, motor control, and safety critical protection systems. Designers must meet strict functional safety requirements while ensuring fast response, high accuracy, and reliable operation in harsh automotive environments.
Littelfuse has introduced a new family of automotive qualified current sensors designed specifically for these next generation EV and HEV applications. The portfolio includes six open loop Hall effect current sensors that provide precise, isolated current measurement for battery, motor, and protection systems.
The product family includes battery management as well as motor control sensors. The products along with their functions are listed below :
- CH1B02xB, CH1B032B, CH1B040B : Battery management current sensors supporting measurements up to ±1500 A for BMS, DC links, and high voltage junction boxes.
- CH1B02xM, CH1P01xM : Motor control current sensors deliver low noise, ratiometric analog outputs for fast switching inverter applications.
- CH1B050P : Dedicated pyro fuse trigger module designed to detect fault currents and activate the pyro fuse within microseconds.
All sensors are designed in compact busbar mounted form factors and are available with either analog voltage outputs or digital communication through CAN or LIN. Select CAN based models support ASIL C capable current measurement and include AUTOSAR compliant diagnostics, enabling use in safety critical systems such as battery disconnect units.
The Key features include :
- Open loop Hall effect sensing with electrical isolation
- Current measurement up to plus or minus ±1500 A
- Analog voltage or digital CAN and LIN output options
- ASIL capable models with built in diagnostics
- Dedicated pyro fuse trigger for fast fault isolation
By combining high accuracy current sensing with functional safety support and flexible integration options, the new Littelfuse automotive current sensor family enables safer, more efficient, and more reliable electric and hybrid vehicle designs.
