Parallel connection method for multiple loops of direct-current high-voltage system of new energy vehicles and ships

Abstract

The invention discloses a parallel connection method for multiple loops of a direct-current high-voltage system of new energy vehicles and ships. The multiple loops of the direct-current high-voltagesystem are involved in the method and are composed of a first battery pack and a second battery pack. According to the invention, two groups of battery systems can be effectively connected in parallelinto a whole to provide energy for a load, so the influence of voltage difference between the two groups of battery systems is effectively solved, and meanwhile, when one group of battery pack has aserious fault and needs to be maintained, recovery can be conveniently conducted without worrying about the influence of a voltage difference; the charging circuits of the first battery pack and the second battery pack are connected in parallel through a high-power conduction diode D3 and a high-power conduction diode D4, so the two battery packs form a whole to be charged by a charger, and the problem that an existing system needs two independent charging interfaces to respectively charge battery systems is solved; and the charging system is simplified, personnel on duty is not needed, and acharging gun does not need to be pulled out manually to charge another group of batteries after charging of one group of batteries is completed.

Description

technical field [0001] The invention belongs to the technical field of multi-circuit switching of new energy systems, and more specifically relates to a multi-circuit connection method for new energy vehicle and ship DC high-voltage systems. Background technique [0002] New energy (NE) is also called unconventional energy. Refers to various forms of energy other than traditional energy. Refers to energy sources that have just begun to be developed and utilized or are being actively researched and yet to be promoted, such as solar energy, geothermal energy, wind energy, ocean energy, biomass energy, and nuclear fusion energy. New energy generally refers to renewable energy that is developed and utilized on the basis of new technologies, including solar energy, biomass energy, wind energy, geothermal energy, wave energy, ocean current energy, and tidal energy, as well as thermal cycles between the ocean surface and deep layers, etc. In addition, there are hydrogen energy, b...

AI Technical Summary

Problems solved by technology

The existing vehicle and ship power supply system needs to charge the two battery pack systems separately through the control of K1 / K2 / K3, and cannot charge battery 1 and battery 2 at the same time; the existing charging system needs two independent charging interfaces to The problem of charging the battery system separately often requires personnel to be on duty, and it is necessary to wait for one group of batteries to be charged, then manually pull out the charging gun, and then charge the other group of batteries. Therefore, we need to propose a new energy vehicle and ship DC high voltage system. Multi-loop connection method

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