Main power supply storage battery grouping type independent power supply and charging system of electric ship

Abstract

The invention discloses a main power supply storage battery grouping type independent power supply and charging system of an electric ship. Main power supply storage batteries are divided into n groups 1G-nG; the output ends of the storage battery groups are subjected to short circuit protection through fuses and then are connected with respective segmented busbars; the segmented busbars are usedfor mutual backup; each storage battery group is configured with a charger and is provided with n main switches 1Q-nQ; each segmented busbar is connected with the wire inlet end of one main switch; and the wire outlet ends of the main switches 1Q-nQ are connected to a direct-current busbar. According to the system, an existing method for parallel power supply of multiple storage battery groups based on a DC / DC converter is replaced with independent power supply of the grouped main power supply storage batteries of the electric ship, so that the technical problem that the multiple storage battery groups are directly connected in parallel to form a circulating current is solved; and the grouped storage batteries are simultaneously and independently charged, so that the problem that the charging power is excessively high in the prior art is solved, and the technical problem that the charging time is excessively long due to the fact that the multiple storage batteries are charged in sequence is solved.

Description

technical field [0001] The invention relates to an electric ship main power supply storage battery group independent power supply and charging system, belonging to the technical field of ship main power supply devices. Background technique [0002] Electric propulsion boats whose main power source is powered by battery packs are called electric boats. In the past, electric boats were basically small inland river sightseeing yachts with low main power supply voltage, small capacity, and low endurance requirements. The battery capacity is similar to that of domestic electric vehicles, generally around 200Ah. The rated output electric energy is about 80kWh or less, there is no need to connect batteries in parallel to expand capacity, and there is no problem such as difficult charging operation. In recent years, the application range of electric boats has expanded, and the electric propulsion power and endurance have increased accordingly. The main power supply has developed fr...

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