Self-conversion charging inverter circuit and charging method

Abstract

The invention provides a self-conversion charging inverter circuit and a method for charging with the inverter circuit. A full bridge inverter circuit is used for achieving charging on a storage battery. The method comprises the steps that through a single chip microcomputer, a first power tube and a second power tube connected with a drain electrode and a positive electrode of the storage battery are controlled to be in a turned-off state; meanwhile, a third power tube and a fourth power tube are periodically controlled to be in a connecting-and-turned-off state, and accordingly voltages suitable for charging on the storage battery are obtained; and the output end of the inverter circuit is communicated with electric supply and then is used as a charging output end, namely continuous charging on the storage battery can be achieved. The full bridge inverter circuit is fully used for effective charging on the storage battery, the functions of the full bridge inverter circuit are expanded, the full bridge inverter circuit can be used to the maximum degree, circuit cost is lowered, circuit operation reliability is improved, interconversion of charging and inverting can be automatically achieved, and accordingly continuous power supply on a load is guaranteed.

Description

technical field [0001] The invention relates to an electric device, in particular to a circuit capable of both charging a storage battery and inverting. Background technique [0002] Please refer to figure 1 As shown, the existing charging inverter circuit generally includes two parts: a charging circuit and a full-bridge inverter circuit, wherein the full-bridge inverter circuit includes a battery BAT, a single-chip microcomputer MCU, a transformer T1 and four power A full-bridge circuit composed of tubes Q1, Q2, Q3, and Q4. Among them, each power tube contains parasitic diodes VD1, VD2, VD3, VD4 respectively, the input end of the charging circuit is connected to the mains, the output end of the charging circuit is connected to the positive and negative poles of the battery BAT; the public contact of the contactor RELAY is connected to the The power supply end of the live wire of the load is connected, the first normally open contact of the contactor RELAY is connected wi...

AI Technical Summary

Problems solved by technology

Excessive charging voltage and excessive charging current can directly cause damage to the chemical substances in the battery, resulting in battery leakage; at the same time, it will cause the battery to overheat, resulting in deformation of the plate, resulting in damage to the battery, or even an explosion. These damages are irreparable

In short, the charging voltage is too high and the charging current is too high, which will seriously affect the service life of the battery and is not applicable at all.

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