High-power modular lead-acid battery formation charging/discharging system

Abstract

The invention discloses a high-power modular battery formation charging/discharging system, belonging to the field of battery formation charge/discharge. The system comprises an invertible DC (direct current) power module, a DC bus, a conversion charging/discharging module and a central control unit. The invertible DC power module adopts an automatic master-slave current sharing technology, can automatically configure the module number according to the system capacity, realizes automatic current sharing among the modules, and can inversion-feed the redundant electric energy back to the power grid so as to realize master-slave redundant invertible DC power module design; the DC bus transmits electric energy in the system; the conversion charging/discharging module is directly connected with the DC bus; by adopting the automatic master-slave current sharing technology, each module can form a loop independently for production, or multiple modules are freely connected in parallel to form a loop for production; and the central control unit is connected with the invertible DC power module and the conversion charging/discharging module through the bus, and can realize the functions of operation data acquisition, system resource allocation, module alternation coordination, system capacity reduction protection and the like.

Description

technical field [0001] The invention relates to a charging and discharging system for forming accumulators, in particular to a highly systematic and modular high-power accumulator forming charging and discharging system. Background technique [0002] In the production process of the battery, the process of activating the positive and negative electrodes inside the battery through a certain charge and discharge method to improve the battery's charge and discharge performance, self-discharge, storage and other comprehensive performance is called formation. Due to the variety of battery models and varieties, the currently widely used batteries in China are converted into charge-discharge machines with a wide variety of models, and the charge-discharge machines used for large, medium, and small dense batteries cannot be used universally, resulting in the need for battery manufacturers to purchase a large number of equipment, and each equipment is relatively large. Independently,...

AI Technical Summary

Problems solved by technology

Due to the variety of battery models and varieties, the currently widely used batteries in China are converted into charge-discharge machines with a wide variety of models, and the charge-discharge machines used for large, medium, and small dense batteries cannot be used universally, resulting in the need for battery manufacturers to purchase a large number of equipment, and each equipment is relatively large. Independent, a large number of cables need to be laid on the formation site, which not only increases the investment, but also increases the line loss

The large amount of electric energy released during the battery discharge process cannot be effectively utilized, and most of it is directly unloaded as heat, resulting in waste of electric energy, generally low equipment efficiency, and also increases the manufacturing cost of the battery; some more advanced equipment is only Simple inverter feeds back to the grid, the inverter efficiency is very low, and the harmonic component is large, resulting in increased heat generation of the equipment, resulting in waste of electric energy and shortening the life of the equipment

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