Gazprom Transgaz Saint Petersburg patented a submersible battery for manned submersibles. The development is designed to operate under conditions of increased hydrostatic pressure — where conventional batteries fail.
The main task that the engineers solved was to increase the capacity and voltage of the system, as well as to make it more reliable. The battery blocks were assembled from prismatic lithium-ion cells. They are connected in parallel and in series in the required quantity to obtain the desired voltage and capacity.
Each battery module was placed in a sealed container made of titanium alloy. Titanium was chosen for a reason — it is strong, lightweight, and not afraid of corrosion in seawater. Two power and two information hermetic connectors are installed on the container for connection to the apparatus.
The battery is equipped with a monitoring and control system. It monitors the condition of each module, collects parameters, and transmits data to the submersible's board. This allows for prompt response to changes and prevention of emergency situations.