Two-way no-wear equalization circuit based on normal shock DC (Direct Current) /DC convertor

Abstract

The invention discloses a two-way no-wear equalization circuit based on a normal shock DC (Direct Current) /DC convertor. The two-way no-wear equalization circuit comprises a battery group, a positive electrode-negative electrode switching circuit, a matrix switch circuit, a voltage collection circuit and a vehicle-mounted 24V lead-acid battery, which are connected in series, wherein the input end of the normal shock DC/DC convertor is connected with the vehicle-mounted 24V lead-acid battery, and the output end of the normal shock DC/DC convertor is connected with the positive electrode-negative electrode switching circuit; one end of the matrix switch circuit is connected with the positive electrode and the negative electrode of each battery monomer of the battery group, and the other end of the matrix switch circuit is connected with the positive electrode-negative electrode switching circuit; and one end of the voltage collection circuit is connected with the corresponding battery monomer of the battery group through a voltage detection flat cable, the other end of the voltage collection circuit is accessed to a main control module, and the control signals of the normal shock DC/DC convertor, the positive electrode-negative electrode switching circuit and the matrix switch are respectively accessed into the main control module. The two-way no-wear equalization circuit provided by the invention has the advantages that the equalization current is high, the equalization time is shortened, the equalization efficiency is improved, the circuit design is simple, the cost is low, the volume is small, and the two-way no-wear equalization circuit is easy to realize.

Description

technical field [0001] The invention designs a bidirectional lossless equalization circuit based on a forward DC / DC converter, which belongs to the technical field of battery protection. Background technique [0002] With the aggravation of energy crisis and environmental pollution, energy-saving and environment-friendly electric vehicles have become a research hotspot. Power lithium batteries have the advantages of high energy density, long cycle life, low automatic discharge rate, and low pollution, and have gradually become the preferred power source for electric vehicles. In order to ensure the safe and long-life operation of the lithium battery, it is necessary to manage the power lithium battery pack correctly and effectively. The detection and control of the performance parameters of the power lithium battery pack become the key factors affecting the performance of electric vehicles. [0003] The three key technologies for the development of electric vehicles are: ba...

AI Technical Summary

Problems solved by technology

Because the excess power in the single battery is consumed in vain by the bypass resistor, it causes waste of battery energy, and the discharge of the resistor will generate a lot of heat, so the equalization current of this method is also small

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