Lithium battery charging and discharging control system for novel solar street lamp

Abstract

The invention relates to a lithium battery charging and discharging control device, in particular to a lithium battery charging and discharging control system for a novel solar street lamp. The control system mainly comprises a single chip microcomputer controller, multiple lithium batteries, electromagnetic relays, a discharging loop and a charging loop, the electromagnetic relays are electrically connected with the lithium batteries to form multiple levels of battery pack control circuits, a first pin of the electromagnetic relay of one battery pack control circuit is electrically connected with a second pin of the electromagnetic relay of the next battery pack control circuit, when charging and discharging failures exist in one lithium battery in a detection battery pack of the singe chip microcomputer controller, the lithium battery is disconnected with the charging loop and discharging loop by controlling the corresponding electromagnetic relay to be disconnected, charging and discharging operations of other lithium batteries are not influenced, electricity is constantly supplied to the street lamp, reliability and safety of the charging and discharging operations are effectively guaranteed, and charging and discharging of the lithium batteries are intelligently controlled.

Description

technical field [0001] The invention relates to a lithium battery charge and discharge control device, in particular to a new solar street lamp lithium battery charge and discharge control system. Background technique [0002] Lithium battery is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. Lithium batteries have obvious advantages in industrial production and application, and have been widely used in the field of solar street lamps. The specific characteristics are as follows: 1. Lithium batteries are non-polluting, and there is no toxic lithium manganate and lithium iron phosphate batteries in lithium batteries. Material; 2. Lithium batteries have no memory effect. Lithium batteries do not need to be treated like nickel-cadmium and nickel-hydrogen batteries before each charge and discharge. Lithium batteries can be charged and discharged at any time; 3. Lithium batteries are small ...

AI Technical Summary

Problems solved by technology

In order to ensure the safety of lithium battery charging and discharging operations, a single lithium battery charge and discharge management system is generally used at present, that is, to manage the charge and discharge of each single battery in the entire lithium battery series battery pack. Although the mode can effectively guarantee the safety of lithium battery charging and discharging operations, during the charging process, as long as one lithium battery in the series battery pack overcharges, the charging circuit will be disconnected, resulting in the batteries in the battery pack being unable to be fully charged; during the discharging process In this case, as long as one lithium battery in the series battery pack is over-discharged, the discharge circuit will be disconnected, which will shorten the discharge cycle of the battery pack, and easily lead to a smaller lithium battery capacity and a shorter service life.

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