Path optimization control method and device for liquid metal battery pack

Abstract

The invention discloses a path optimization control method and device for a liquid metal battery pack, and belongs to the technical field of liquid metal battery application, and the method comprises the following steps: S1, building a graph theory model corresponding to a battery module composed of a plurality of liquid metal batteries; s2, designing a double-layer equalization topology corresponding to an inductor and a multi-winding transformer in the graph theory model; s3, calculating the equalization efficiency and the equalization speed of the graph theory model by utilizing the equalization parameter of each section of path in the double-layer equalization topological graph theory model, and taking the equalization efficiency and the equalization speed as constraint conditions; s4, taking the index function of the circuit loss and the equalization time added with the weight as a target function to establish an equalization path optimization model; and S5, solving the equilibrium path optimization model by using an ant colony algorithm to obtain an optimal equilibrium path meeting the objective function and the constraint condition. According to the invention, the battery equalization problem is converted into a function optimization problem with constraint conditions, the optimal equalization path is obtained by using the ant colony algorithm, and the equalization efficiency and the equalization speed can be improved.

Description

technical field [0001] The invention belongs to the field of liquid metal battery application technology, and more particularly relates to a path optimization control method and device for a liquid metal battery pack. Background technique [0002] Liquid metal battery is a potential energy storage battery that can be used for grid-level energy storage. It has the characteristics of long service life, high working current, and large capacity. In order to meet the high-voltage and large-capacity requirements of large-scale energy storage systems such as energy storage power stations, liquid metal batteries are often used in groups in series and parallel. However, there are inevitable differences in the manufacturing and operation of each battery cell, and the resulting inconsistency of the battery pack will reduce the performance and usable capacity of the entire battery pack, eventually shortening the service life of the battery pack, and even causing battery deformation, Sa...

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a path optimization control method and device for a liquid metal battery pack, the purpose of which is to provide a path based on graph theory and ant colony algorithm to find the best balance effect, so as to effectively Improve the efficiency and speed of the equalization system, thereby solving the technical problem that the traditional equalization method is difficult to meet the equalization requirements of long-string battery packs and cannot take into account the equalization efficiency and equalization speed

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