Direct-current energy storage system based on distributed multiple storage battery modules and control method

Abstract

The invention belongs to the technical field of electric vehicle storage battery energy storage, in particular relates to a direct-current energy storage system based on the distributed multiple storage battery modules and a control method. For an electric vehicle, the miniature storage battery modules with multiple modules and control operation functional circuits are adopted without needing thespecial devices, so that the manual replacement is facilitated. Each of the multiple storage battery modules can be independently controlled to operate, and the direct-current distributed storage battery modules can also be independently connected with a power grid for charging and discharging, so that a pile-free plug-and-play function is achieved. The electric vehicle adopts a direct-current motor and an electric appliance, and the storage battery for mainly supplying power is also a direct current storage battery, so that the direct current power supply of the storage battery can obtain higher efficiency. The direct-current distributed storage battery modules can be identified and controlled, so that the sharing and flexible replacement of the direct-current distributed storage batterymodules can be achieved, the running and storage of the storage batteries are guaranteed, the safety of the storage batteries is greatly improved, the electricity and vehicle separation management canbe achieved conveniently, and the usage requirement of the electric vehicle can be greatly met.

Description

technical field [0001] The invention belongs to the technical field of battery energy storage for electric vehicles, and in particular relates to a DC energy storage system based on distributed multi-battery modules and a control method. Background technique [0002] As we all know, new energy electricity and electric vehicles are becoming more and more widely used and popularized, and have become a development trend of energy and environmental protection. In particular, the advancement of energy storage batteries provides a feasible support and technical path for the stable power supply of new energy power, and at the same time promotes the application and promotion of electric vehicles. vigorous support and response. [0003] At present, because there are not enough charging piles for electric vehicles and the charging speed is slow, it is inconvenient to charge and wastes the precious time of users; and for electric vehicles that use battery replacement, due to the high ...

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Problems solved by technology

[0003] At present, because there are not enough charging piles for electric vehicles and the charging speed is slow, it is inconvenient to charge and wastes the precious time of users; and for electric vehicles that use battery replacement, due to the high price of batteries, users cannot use them one at a time; especially those currently used in the market The battery does not have a functional circuit module to control the operation, and there are new and old batteries in the replacement station, and the value is different, and it is difficult to distinguish between true and false. At present, electric vehicles use DC motors and electrical appliances, and the main power supply battery is also DC, so the battery is powered by DC. Higher efficiency can be obtained; on the other hand, most battery-swapping electric vehicles use integrated battery modules, and a single unit weighs hundreds of kilograms, requiring professional handling equipment for battery-swapping operations. It affects the enthusiasm of users to use electric vehicles, and also causes troubles for electric vehicle users

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