Control method for modular echelon utilization energy storage battery

Abstract

The invention discloses a control method for a modular echelon utilization energy storage battery. An echelon utilization energy storage battery system is provided, wherein the echelon utilization energy storage battery system comprises a charging main circuit, an echelon utilization load circuit, an echelon utilization contact switch and multiple single lithium batteries; the multiple single lithium batteries are arranged between the positive electrode and the negative electrode of the charging main circuit in series; the echelon utilization contact switch is used for regulating the quantity of the single lithium batteries which are connected with the echelon utilization load circuit in parallel; any two adjacent single lithium batteries form a balance basic unit; each balance basic unit is provided with a shuttle balance capacitor; a bidirectional change-over switch is arranged at each of the positive electrode end and the negative electrode end of each shuttle balance capacitor separately; and two bidirectional change-over switches are alternately connected with the positive electrode and the negative electrode of the single lithium batteries in the balance basic units. By adoption of the control method provided by the invention, the electric energy echelon utilization of the power battery pack and the capacity balance of all the single lithium batteries can be realized.

Description

technical field [0001] The invention relates to the technical field of new energy power lithium batteries, in particular to a control method for modular cascade utilization energy storage batteries. Background technique [0002] New energy refers to various energy forms other than traditional energy that have just begun to be developed and utilized or are being actively researched and yet to be promoted. New energy can effectively deal with oil crises and environmental pollution, such as solar energy, geothermal energy, and wind energy. , ocean energy, biomass energy and nuclear fusion energy, etc.; the storage, transfer and utilization of new energy is a key link in the promotion of new energy, and it is also a technical problem of key public relations. The storage of new energy mainly uses certain technologies to convert new energy into chemical energy, Potential energy, kinetic energy, electromagnetic energy and other forms make the converted energy have the characteristi...

AI Technical Summary

Problems solved by technology

The most common energy storage method is battery energy storage, but the power storage battery technology that provides new energy for power equipment with high energy consumption and high power still needs to be further developed.

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