Energy-saving capacity grading device for power batteries

Abstract

The invention relates to an energy-saving capacity grading device for power batteries. The energy-saving capacity grading device comprises a plurality of terminal charge and discharge modules, an inverter module and an upper computer module, wherein the upper computer module simultaneously monitors and controls a plurality of capacity grading channels; the capacity grading channels charge single power batteries with the same voltage source; a constant-voltage and constant-current source of each terminal charge and discharge module is independently controlled; and during discharging, an MCU boosts the single power batteries through charge and discharge switching modules in series and a power module converts AC voltage into DC high voltage to connect to two ends of a common DC bus, so that energy is fed back to an AC power grid for grid connection or graded capacities are formed to be recycled in the single power batteries. Therefore, the charge and discharge conversion rate is effectively improved, the power consumption is low, the volume is small and the effects of environmental protection and energy conservation are achieved.

Description

【Technical Field】 [0001] The invention relates to a power battery energy-saving capacity-dividing equipment device for battery power. 【Background technique】 [0002] With the gradual shortage of fossil resources and the increasing environmental pressure, the domestic and foreign markets are driven to actively develop alternative energy and energy storage technologies. At the same time, with the continuous progress and development of society, there are a variety of batteries with different voltage levels in daily life. Since the power supply voltage used by each type of battery is different, the power battery cells used are different. Some batteries require a higher power source, and some batteries require a lower power source. The battery capacity dividing device is a required part of the power battery cell. However, the charging conversion method of the existing battery capacity divider device adopts the power frequency voltage transformer type and the SCR type. A charging an...

AI Technical Summary

Problems solved by technology

Since the charging harmonic content of the high-frequency switching power supply power battery unit is relatively high, additional power transmission and distribution and harmonic losses will be increased. During the charging and discharging process, all electric energy is consumed by resistive discharge or electronic charging, and the amount of waste is great

Therefore, the charging conversion efficiency of the two kinds of power battery cells in the prior art is low, the power consumption is large, the environment is polluted, the volume is huge and the floor area is large.

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