Onboard high voltage battery charging system of an outboard marine propulsion system

A gearing system comprising:

• a motor having a shaft, the shaft extending from the motor to a terminal end external to the motor;
• a planetary gear set comprising a sun gear, two or more planet gears coupled to a carrier, and a ring gear, the planetary gear set having a proximal side facing towards the motor and a distal side facing away from the motor, wherein the sun gear is disposed on the distal side;
• a housing enclosing the planetary gearset, the housing coupled to the ring gear;
• wherein:
• the axle extends at least partially through the housing and the planetary gearset, and the shaft is coupled to the sun gear;
• and
• when the shaft rotates at a first revolutions per minute (RPM), the housing rotates at a second RPM that is less than the first RPM.

A system comprising:

• a motor;
• an input shaft extending from the motor to a terminal end;
• a planetary gearset adjacent and in contact with the reservoir, the planetary gearset comprising a sun gear, two or more planet gears coupled to a carrier, a ring gear, and an output shaft, wherein the input shaft is coupled to the sun gear and the output shaft is coupled to the carrier;
• and
• a reservoir disposed between the motor and the planetary gearset, the reservoir comprising a toroidal shape around the input shaft, wherein the reservoir is fluidically isolated from the shaft and the planetary gearset.

A marine propulsion apparatus comprising:

• a first drive shaft;
• a lifting plate fixed relative to the first drive shaft;
• a midsection top collar;
• a first strut extending from a proximal end to a distal end and a second strut extending from a proximal end to a distal end, each of the first strut and the second strut having an interior belt void, wherein the first strut is aligned with the second strut and the first strut is spaced from the second strut, wherein the proximal ends of the first strut and the second strut are coupled to the midsection top collar;
• a lower unit coupled to the distal ends of the first strut and the second strut, the lower unit having a second drive shaft, wherein the midsection top collar is fixed relative to the second drive shaft;
• a belt rotatably coupling the first drive shaft to the second drive shaft, wherein a first portion of the belt is disposed within the interior belt void of the first strut and a second portion of the belt is disposed within the interior belt void of the second strut;
• one or more lifting screws coupling the lifting plate to the midsection top collar, wherein adjusting the one or more lifting screws changes a distance between the lifting plate and the midsection top collar, thereby adjusting a tension of the belt;
• and
• an actuator disposed on each of the one or more lifting screws.

A system comprising:

• an electric boat motor;
• a lower unit coupled to the electric boat motor, the lower unit comprising a propeller;
• an inverter;
• an onboard battery charger coupled to the inverter and one or more high-voltage batteries;
• a heat transfer circuit comprising:
• a reservoir having a working fluid;
• a pump;
• a valve;
• a first tube fluidically coupling the reservoir to the pump;
• a second tube fluidically coupling the pump to the valve;
• a third tube fluidically coupling the valve to the inverter;
• a fourth tube fluidically coupling the valve to the onboard battery charger;
• a fifth tube fluidically coupling the inverter to the motor;
• a sixth tube fluidically coupling motor to the lower unit;
• a seventh tube fluidically coupling the onboard battery charger to the sixth tube;
• an eighth tube fluidically coupling the lower unit to the reservoir;
• wherein:
• when in a charging configuration, the valve allows working fluid to flow through the fourth tube to the onboard battery charger;
• and
• when in an operational configuration, the valve does not allow working fluid to flow through the fourth tube.