High-voltage contactor switching systems and methods

摘要

Systems and methods for switching high-voltage contactors in a battery system with reduced degradation over time are presented. In certain embodiments, a system may include solid-state switches disposed is parallel with the high-voltage contactors. The solid-state switches may be configured to selectively close when the high-voltage contactors are in transition from a closed state to an open state. By closing the solid-state switches during this transition, electrical arcing and associated degradation and/or damage to the contactors may be reduced.

主权项

1. A system comprising:
a primary contactor configured to selectively couple a positive terminal of a battery system to a primary rail; a primary contactor relay driver configured to actuate the primary contactor; a primary monostable triggered circuit coupled to an output of the primary contactor relay driver; a secondary contactor configured to selectively couple a negative terminal of the battery system to a secondary rail; a secondary contactor relay driver configured to actuate the secondary contactor; a primary solid-state switch configured to selectively couple the positive terminal to the primary rail when the primary contactor is in transition from a first state to a second state; a primary solid-state switch driving circuit coupled to an output of the primary monostable triggered circuit configured to selectively actuate the primary solid-state switch based on a signal derived from the output of the primary contactor relay driver; and a secondary solid-state switch configured to selectively couple the negative terminal to the secondary rail when the secondary contactor is in transition from the first state to the second state.