Lead-acid storage battery charging circuit and charging method

Abstract

The invention discloses a lead-acid storage battery charging circuit and a charging method. The charging circuit comprises a battery voltage sampling circuit, a battery charging output circuit, an alternating-current and direct-current conversion circuit and a control circuit. The input end of the alternating-current and direct-current conversion circuit is connected with an alternating-current power supply, and the output end of the alternating-current and direct-current conversion circuit is connected with the battery charging output circuit. The output end of the battery charging output circuit and the sampling end of the battery voltage sampling circuit are respectively connected with the charging interface of the lead-acid storage battery. The control circuit comprises a microcontroller, the output end of the battery voltage sampling circuit is connected with the battery voltage sampling signal input end of the microcontroller, and the control end of the AC-DC conversion circuit and the control end of the battery charging output circuit are respectively connected with the control signal output end of the microcontroller. According to the invention, each module circuit of the charging circuit is controlled by the microcontroller, and the accuracy and reliability of the output voltage are good. According to the charging method, various voltage specifications can be identified, the charging use steps of a user are simplified, the service life of the battery is prolonged, and the charging efficiency is improved.

Description

[technical field] [0001] The invention relates to charging a lead-acid storage battery of an electric vehicle, in particular to a charging circuit and a charging method for a lead-acid storage battery. [Background technique] [0002] As electric vehicles are a common means of transportation in small and medium-sized cities, it is inevitable to equip electric vehicles with charging stations; however, during the use of electric vehicle charging stations, due to the inability to determine the voltage specifications of the bicycle batteries used and the correct charging voltage cannot be set, there may be excessive In the state of charging or undercharging, the overcharging state will cause serious heating of the battery, which will affect the service life of the battery, and even cause serious consequences such as fire. And the charging efficiency of the charging station; in addition, because the charging station needs to manually set the charging voltage, under the premise of ...

AI Technical Summary

Problems solved by technology

[0004] This utility model completely adopts analog circuit to adjust the output voltage, and the accuracy and reliability are low

In addition, the voltage specifications of commonly used electric vehicle batteries are 36V, 48V, 60V and 72V.

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