The invention relates to an accumulator module (26) comprising a moisture-proof housing (28), in which a plurality of accumulator cells (31) is disposed, the contacts of which are electrically interconnected and which are routed to external contacts (30) of the accumulator module (26) disposed at the outer face of the housing (28). To be able to detect a short circuit between the external contacts (30) of the accumulator module (26) in the simplest and most efficient manner possible, it is proposed that a protection device (35) is disposed inside the housing (28), which protection device comprises a detection device (36), which is designed to detect a short circuit between the external contacts (30). Furthermore, the invention relates to a swimming and diving aid (10) comprising such an accumulator module (26).

The invention relates to an accumulator module (26) comprising a moisture-proof housing (28), in which a plurality of accumulator cells (31) is disposed, the contacts of which are electrically interconnected and which are routed to external contacts (30) of the accumulator module (26) disposed at the outer face of the housing (28). To be able to detect a short circuit between the external contacts (30) of the accumulator module (26) in the simplest and most efficient manner possible, it is proposed that a protection device (35) is disposed inside the housing (28), which protection device comprises a detection device (36), which is designed to detect a short circuit between the external contacts (30). Furthermore, the invention relates to a swimming and diving aid (10) comprising such an accumulator module (26).

Extended range, removeable batteries, and removeable electronic control modules for a motorized surfboard fin is disclosed. The motorized fin is attached to the bottom of a surfboard to assist a surf rider in paddling, propulsion, and catching a wave. The motorized fin device integrates a propeller, motor, battery, charging assembly, and related electronics, which are activated by the rider via a remote control. The fin is adapted to fit standardized fin securement systems by way of interchangeable connectors. The remote control has geolocation tracking and wireless charging capability. A software application for use with a smartphone is used to perform configuration and maintenance functions.

A handheld underwater aircraft includes a battery compartment (12) and propellers. There are at least two propellers, which are symmetrically distributed on both sides of the battery compartment (12), and are connected to the battery compartment (12). A special design with axes of the propellers being unparallel with an axis of the battery compartment (12) is adopted, and unparallel included angles make component forces generated by the various propellers in a direction of motion of a non-underwater aircraft offset each other, and enable the underwater aircraft to maintain balanced and forward-forward motion. The design with the axes of the propellers being unparallel with the axis of the battery compartment (12) leads to a little power loss, but avoids a larger power loss caused by the impact of water on the human body, thereby comprehensively improving the thrust of the underwater aircraft in use.

A handheld underwater aircraft includes a battery compartment (12) and propellers. There are at least two propellers, which are symmetrically distributed on both sides of the battery compartment (12), and are connected to the battery compartment (12). A special design with axes of the propellers being unparallel with an axis of the battery compartment (12) is adopted, and unparallel included angles make component forces generated by the various propellers in a direction of motion of a non-underwater aircraft offset each other, and enable the underwater aircraft to maintain balanced and forward-forward motion. The design with the axes of the propellers being unparallel with the axis of the battery compartment (12) leads to a little power loss, but avoids a larger power loss caused by the impact of water on the human body, thereby comprehensively improving the thrust of the underwater aircraft in use.

The present application relates to the field of underwater propeller, and more particular, to a multifunctional underwater propeller, which includes a propeller body. The propeller body is detachably connected with a handle, and a surface of the propeller body is connected with an adapter structure for detachably connecting external equipment. The adapter structure includes a connecting piece and a slide rail, and the connecting piece is in plug-in connection with the slide rail, and configured for detachably connecting the external equipment.

An underwater propulsion system is disclosed comprising a foot board with one or more battery-powered propulsion units. A throttle control system may be enabled in the foot board such that a movement of the user's foot controls the throttle. Flattened Lithium batteries allow thin lightweight construction of the foot board. Use of trolling motors as propulsion units provides thrust advantages over pre-existing underwater scooters.

An underwater propulsion system is disclosed comprising a foot board with one or more battery-powered propulsion units. A throttle control system may be enabled in the foot board such that a movement of the user's foot controls the throttle. Flattened Lithium batteries allow thin lightweight construction of the foot board. Use of trolling motors as propulsion units provides thrust advantages over pre-existing underwater scooters.

Summary

The present invention relates to a system and method of self-rescue of people in distress in an aquatic environment, personal beacon (10) emitting distress and location signals and a U-shaped buoy (20), self-propelled by turbines and battery powered, configured to carry out the self-rescue method and provided with an electronics module (30) in the said U-shaped buoy (20), equipped with signal processing and data processing means, operatively connected to the turbines (40).