Energy transfer type single battery voltage management circuit

Abstract

The invention relates to an energy transfer type battery monomer voltage management circuit which is used for managing a battery pack comprising a plurality of battery monomers connected in series, the battery pack is divided into a plurality of battery units, each battery unit comprises a plurality of battery rows connected in series, and each battery row comprises a plurality of battery monomers. The management circuit comprises a transformer, a plurality of inductors, a plurality of energy storage capacitors and a plurality of switching tubes, the transformer is provided with a plurality of primary windings, the two ends of a secondary winding of the transformer are connected with the positive electrode and the negative electrode of the battery pack through the switching tubes respectively, and the primary windings are connected to the two ends of the battery units in parallel through the different switching tubes respectively; and two ends of each battery row are connected in parallel with an inductor through a switch tube, and an energy storage capacitor is connected in series between the adjacent inductors connected in parallel with the battery row in each battery unit. According to the energy transfer type battery monomer voltage management circuit, the inconsistency of the batteries of the battery pack is improved, and the service life of the batteries is prolonged.

Description

technical field [0001] The invention relates to the technical field of battery management, in particular to an energy transfer type battery cell voltage management circuit. Background technique [0002] The service life of the battery pack is seriously affected by the inconsistency of the battery. According to the "barrel effect", the battery pack is obviously inferior to the performance of the monomer in terms of cycle life and capacity utilization. With the repeated use of the battery pack, the inconsistency of the cells will intensify, further deteriorating the group characteristics of lithium-ion batteries, and it is very easy to overcharge and over-discharge a few cells, which will lead to a significant decline in the performance of the battery pack. In extreme cases, it may even Vicious accidents such as combustion and explosion have caused great obstacles to the application and promotion of lithium-ion batteries. [0003] Balance control of the battery pack, that is,...

AI Technical Summary

Problems solved by technology

[0002] The service life of the battery pack is seriously affected by the inconsistency of the battery. According to the "barrel effect", the battery pack is obviously inferior to the performance of the monomer in terms of cycle life and capacity utilization.

With the repeated use of the battery pack, the inconsistency of the cells will intensify, further deteriorating the group characteristics of lithium-ion batteries, and it is very easy to overcharge and over-discharge a few cells, which will lead to a significant decline in the performance of the battery pack. In extreme cases, it may even Vicious accidents such as combustion and explosion have caused great obstacles to the application and promotion of lithium-ion batteries

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