Systems and methods for internal discharge of battery systems

A vehicle system comprising:

• one or more processing circuits including one or more memory devices storing instructions thereon that, when executed by one or more processors, cause the one or more processors to:
• monitor a battery system of a vehicle, wherein the battery system is configured to provide power to an alternating current motor of the vehicle that drives an axle of the vehicle;
• detect a fault associated with the battery system;
• trigger a discharge protocol for the battery system in response to the fault;
• provide direct current power from the battery system to the alternating current motor to discharge the battery system in accordance with the discharge protocol;
• monitor a first temperature of a motor controller of the vehicle and a second temperature of the alternating current motor during the discharge protocol;
• modulate the direct current power provided to the alternating current motor to maintain the first temperature of the motor controller below a first temperature threshold and the alternating current motor below a second temperature threshold;
• and
• permit the first temperature of the motor controller to exceed the first temperature threshold and the second temperature of the alternating current motor to exceed the second temperature threshold to prioritize prevention of an overcharge condition of the battery system during the discharge protocol.

A vehicle system comprising:

• one or more processing circuits including one or more memory devices storing instructions thereon that, when executed by one or more processors, cause the one or more processors to:
• monitor a battery system of a vehicle, wherein the battery system is configured to provide power to an alternating current motor of the vehicle that drives an axle of the vehicle;
• detect a fault associated with the battery system;
• trigger a discharge protocol for the battery system in response to the fault;
• provide direct current power from the battery system to the alternating current motor to discharge the battery system in accordance with the discharge protocol;
• ignore throttle commands from an operator during the discharge protocol;
• and
• wait for the vehicle to come to a stop if moving before providing the direct current power to the alternating current motor.