Battery charging circuit and charging method

Abstract

The invention discloses a battery charging circuit and charging method. The circuit comprises a charging power circuit, a charging control unit and a battery management system, wherein the battery management system is used for collecting terminal voltage data of a battery and is connected with the charging control unit through a communication interface; the charging control unit sends control signals to the charging power circuit according to the battery terminal voltage information; and the charging power circuit outputs a plurality of charging modes according to the control signals to chargethe battery. The method has the advantages that a charging machine is controlled to output different charging modes by adopting a mode of monitoring the terminal voltage in real time, so that the charging process is subjected to a small-current charging stage, a pulse charging stage and a constant-voltage charging stage separately; and according to the charging method which performs charging by different charging modes according to different terminal voltages, the battery can be better protected in the rapid charging process so as to prolong the service life.

Description

technical field [0001] The invention relates to the field of battery charging, in particular to a charging circuit and a charging method. Background technique [0002] Due to the advantages of high energy density, light weight, no memory effect, and environmental protection, lithium batteries have been widely used in various fields; especially in the new energy fields supported by the state, such as electric vehicles and wind energy storage, lithium batteries have been widely used due to their own advantages. With its technological advantages and mature industrial chain, it has become the first choice for doing my part. [0003] Charging technology is the key technology for lithium battery applications. Scientific and reasonable charging methods can speed up charging, improve charging efficiency, reduce battery damage and prolong battery life. During the charging process, if the charging current is too high, a gassing reaction will occur inside the battery, and the temperat...

AI Technical Summary

Problems solved by technology

The advantage of this charging method is that the structure of the charger is simple and the control is convenient; the disadvantage is that the polarization of the battery is not eliminated, and the charging speed is slow, so it is not suitable for fast charging.

The disadvantage of this charging method is that due to the large charging current, the battery temperature will rise rapidly; at the same time, the high current will cause the internal reaction of the battery to be too intense, which is not conducive to the maintenance of battery life.

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