Control protection circuit for charging and discharging lithium battery set

• Main Author: ZHAO CHANGLIAN
• Format: Patent
• Language: Chinese; English
• Published: 12.08.2009
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

A charging/discharging control protective circuit of a lithium battery pack comprises multiple lithium batteries in series, wherein each lithium battery is connected in parallel with a voltage monitoring module of a single battery, and output signals thereof are conveyed to an electronic switch, the output signals of the electronic switch are conveyed to a photoelectric switch, the output signals of the photoelectric switch are connected to a comparative control switch, and a discharging control switch and a charging control switch are controlled by output signals of the comparative control switch. A floating ground signal is converted into a common ground signal by the photoelectric switch, so that the problem that the withstanding voltage of the current safety protection integrated circuit is insufficient is solved, the charging/discharging control protection is realized, and the service lives of the batteries are prolonged.