Marine vessel power systems and control methods

A method of controlling a power system for a marine vessel, the power system comprising a plurality of battery cell packs, including at least a first cell pack and a second cell pack, each marine battery cell pack comprising a plurality of battery cells encapsulated in an external housing configured to be separately mounted in the hull of the marine vessel, and a vessel load powered by the plurality of battery cell packs, the method comprising:

• sensing a presence of water with a low water sensor at a lowest point of the marine vessel occupied by at least one of the plurality of battery cell packs and/or with at least one high water sensor positioned higher on the marine vessel than the low water sensor;
• detecting an inversion of at least one of the plurality of battery cell packs;
• in response to detecting the inversion, identify a logic for detecting a submersion event based on the output of the high water sensor and the output of the low water sensor;
• detecting the submersion event based on the presence of water sensed by the high water sensor and/or the low water sensor;
• and
• generating an ingress mitigation action in response to detection of the submersion event.

A power system for a marine vessel, the system comprising:

• a plurality of battery cell packs, including at least a first cell pack and a second cell pack, each battery cell pack comprising a plurality of battery cells encapsulated in an external housing configured to be separately mounted in the hull of the marine vessel;
• an orientation sensor associated with at least one of the plurality of battery cell packs;
• a vessel load powered by the plurality of battery cell packs;
• at least one low water sensor positioned at a lowest point of the marine vessel occupied by at least one of the plurality of battery cell packs;
• at least one high water sensor positioned higher on the marine vessel than the low water sensor;
• at least one hardware controller configured to:
• detect an inversion of the at least one of the plurality of battery cell packs;
• in response to detecting the inversion, identify a logic for detecting a submersion
• event based on the output of the high water sensor and the output of the low water sensor;
• detect the submersion event based on an output of the high water sensor and an output of the low water sensor;
• and
• generate an ingress mitigation action in response to detection of the submersion event.