Li-ion battery disconnect switches ensure EVs and electric buses remain charged while parked. Power distribution units that incorporate overcurrent protection, solid-state relays, and overvoltage protection devices such as TVS diodes also ensure reliable battery system management. Littelfuse delivers these solutions and others with off-the-shelf, customized, AEC-Q–qualified components.

EVs rely on dc–dc converters to step up or step down current from batteries. This block diagram shows the power conversion solutions Littelfuse offers. Our IGBTs and MOSFETs work with our gate drivers to ensure sensors, control modules, and dc motors receive the electricity they require. We also make diode arrays to keep noise from ESDs out of signals and thermal protectors to prevent overheating.

Ensuring Li-ion batteries charge quickly and safely, have long lives, and distribute power reliably requires using cutting-edge rectifiers, dc–dc converters, battery fuses, solid-state relays, and overvoltage and thermal protection. Littelfuse delivers with off-the-shelf, custom, and properly scaled solutions for material handling equipment, 2- and 3-wheelers, passenger EVs, and electric buses.

Onboard battery chargers convert alternating current from charging stations to direct current for electric passenger vehicle batteries. A block diagram highlights Littelfuse components that can serve as rectifiers, dc–dc converter gate drivers, and circuit protection devices for OBCs in these smaller EVs. Available products include thyristors, TVS diodes, and high-voltage fuses.

Traction inverters perform dc-to-ac conversion for drivetrain motors in EVs. A block diagram shows Littelfuse power converters vehicle makers can use, as well as devices that provide overcurrent, overvoltage, and overtemperature spikes protection to inverters and motor controllers. Available solutions include IGBTs and gate drivers, surface mount fuses, TVS diode arrays, and thermal protectors.