Breaktor circuit protection for electric vehicles

• Reduces coordination complexity between contactors, fuses, and pyro fuses
• Improves fault response time under high fault currents
• Simplifies circuit protection design for high-voltage (HV) EV systems and DC fast charging architectures
• Reduces dependency on multiple devices with different response times
• Supports consistent protection performance across operating conditions

Conventional EV circuit protection architectures rely on multiple components. This includes contactors, fuses, and pyro fuses, coordinated through the battery management system. As high-voltage (HV) system power levels increase, these architectures become more complex to manage.

Because protection functions are distributed across devices with different response times, fault handling often requires coordination between the contactor, fuse, and pyro fuse. This can introduce:

• Complex system integration
• Tight timing dependencies
• Increased risk of miscoordination under high fault currents

In high-voltage (HV) battery electric vehicles, these challenges can impact response time, system coordination, and overall circuit protection design.