Novel battery charging control circuit and method

Abstract

The invention provides a novel battery charging control method. By adding a coordination control mechanism and an integral control strategy and combining the advantages of a voltage regulation strategy and a current limiting strategy, higher response speed, smaller charging overshoot and higher charging current precision of battery charging are realized, the output ripple of a rectifying device isreduced, and the reliability of load operation is improved.

Description

technical field [0001] The invention belongs to the field of power supply and distribution of a DC power system control device, and in particular relates to a novel battery charging control circuit and method. Background technique [0002] At present, the DC uninterruptible power supply system has been widely used in various industries. The power operating power supply is used in the substation to ensure the reliable power supply of control equipment and lighting equipment in the station; the data center uses high-voltage DC power supply to ensure the reliable power supply of the server; the low-voltage communication is used in the communication base The power supply ensures reliable power supply for communication equipment. The battery of the DC uninterruptible power supply system is a key component to achieve reliable power supply. During the long-term operation of the system, the working status of the battery needs to be monitored in real time. When the battery capacity i...

AI Technical Summary

Problems solved by technology

[0003] The voltage regulation strategy gradually adjusts the fixed step voltage to achieve the purpose of controlling the charging current of the battery. In order to suppress the fluctuation of the charging current, the step voltage is generally set very small, and the response time of the battery charging is very long. At the same time, as the battery is used With the continuous aging of the medium, the setting of the step voltage needs to be manually corrected, which wastes a lot of manpower

[0004] The current limiting strategy collects the load current in real time, calculates the total output current of the rectifier device according to the target value of the battery charging current, and indirectly achieves the purpose of controlling the battery charging current by directly controlling the limit value of the total output current of the rectifier device. However, the rectifier When the device is in the current-limiting state, the output ripple is large, which will affect the normal operation of the back-end equipment. At the same time, when the load current changes suddenly, the charging current of the battery will change suddenly, which will cause the impact of the battery and reduce the battery life. service life

Images