Abstract: A driving circuit to control/drive a contactor using a high-side driver integrated into the battery pack controller. The driver circuit may electrically isolate the controller pins of the battery pack controller (which interface the contactors) from the low-voltage digital processing core of the battery pack controller. The driver circuit may provide techniques to diagnose a fault by monitoring the voltage at the output of the driver as compared to the reference voltage. The driver circuit may include an electronic switch, such as a field-effect transistor, that is configured on the high side of the contactor to control voltage from an energy source to the contactor.

Abstract: A monitoring circuit for a battery system of a work machine includes a system controller configured to operate in a low power mode when the battery system is inactive, a sensing circuit element configured to produce an electrical sensor signal representative of an environmental parameter of the battery system, and a wakeup circuit configured to generate a controller activation signal when the sensor signal indicates that the environmental parameter is outside of a specified operating range. The system controller is configured to initiate a controller boot operation in response to the controller activation signal.

Abstract: A system for balancing battery cell charge in a battery array for an electrified machine is provided. The battery array includes a plurality of individual battery cells, or groups of battery cells. A plurality of cell monitors are in communication with the individual battery cells, or groups of battery cells, with the plurality of cell monitors being powered by the individual battery cells, or groups of battery cells. A battery controller of the system receives information about the individual battery cells, or groups of battery cells, from the plurality of cell monitors. The information traverses the plurality of cell monitors in a first pattern to the battery controller and, after a predetermined period of time or occurrence of a predetermined event, the information traverses the plurality of cell monitors in a second pattern that is different than the first pattern to the battery controller.

Abstract: A system for balancing battery cell charge in a battery array for an electrified machine is provided. The battery array includes a plurality of individual battery cells, or groups of battery cells. A plurality of cell monitors are in communication with the individual battery cells, or groups of battery cells, with the plurality of cell monitors being powered by the individual battery cells, or groups of battery cells. A battery controller of the system receives information about the individual battery cells, or groups of battery cells, from the plurality of cell monitors. The information traverses the plurality of cell monitors in a first pattern to the battery controller and, after a predetermined period of time or occurrence of a predetermined event, the information traverses the plurality of cell monitors in a second pattern that is different than the first pattern to the battery controller.

Abstract: A device for protecting sensitive electronic equipment from low level signal lines short circuited to high voltage power sources includes a switch that open the circuit between the data lines and the sensitive computing equipment if a high voltage condition is detected on the data lines. Otherwise, the switch remains closed and data can be transmitted to the computing equipment.

Abstract: A power supply system for supplying power to a load is disclosed. The power supply system includes a power source, a high voltage terminal coupled to the power source, a programmable controller coupled to the power source, and a first low voltage terminal and a second low voltage terminal. Each low voltage terminal is coupled to the programmable controller. The programmable controller may be programmed to switch each of the first and second low voltage terminals between a connected state and a disconnected state and to implement a power up strategy when initially supplying power to the load.

Abstract: A device for protecting sensitive electronic equipment from low level signal lines short circuited to high voltage power sources includes a switch that open the circuit between the data lines and the sensitive computing equipment if a high voltage condition is detected on the data lines. Otherwise, the switch remains closed and data can be transmitted to the computing equipment.