Featuring Breaktor® circuit protection, the battery disconnect unit (BDU) is designed to efficiently distribute power throughout the electric vehicle (EV) system. The BDU provides improved quality and simplified architecture by combining current switching and resettable bidirectional short-circuit protection with fast actuation (up to 900V).
Enabling reduction of up to 15 components from the PDU assembly, Breaktor’s integrated coil driver, economizer, and sensing/triggering circuit reduce overall cost and complexity. Additionally, it’s self-triggering design, diagnostic electronics, and mirror contact help to ensure utmost safety and reliability.
The Battery Disconnect Unit (BDU) in an electric vehicle (EV) essentially acts as an on/off switch to the battery for different EV operating modes. In addition, the BDU distributes and protects power within the EV system.
The BDU is functioning throughout several modes of operation including charging, driving, accelerating and decelerating (or regenerating power). The protection function engages when, for example, the car is in a collision, or another overcurrent event takes place. In these situations, the BDU will disconnect power to ensure the safety of the occupants and other components.
Eaton has a legacy of protecting high power systems with advanced technology from our Electrical Sector. Our BDU leverages this technology with the integration of our own components including:
This allows for innovative packaging and competitiveness with superior system protection.
Breaktor circuit protection technology is exclusive to Eaton and is able to accomplish both switching and protection of the system all in one unit. By combining the function of multiple components in the traditional BDU, Breaktor allows us to eliminate up to 15 components, reducing both cost and complexity. These components include:
Since it’s an all-in-one unit, Breaktor also eliminates the connection components between those parts, including busbars, fasteners, connectors, and content in the BMS like triggering circuits and contactor drivers/economizers.
Work with an Eaton expert to design a unique solution that meets your requirements.
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