Circuit structure suitable for parallel charging and series use of batteries

Abstract

The invention provides a circuit structure suitable for parallel charging and series use of batteries, including: a first MOS tube, a second MOS tube, a third MOS tube, a fourth MOS tube, a fifth MOS tube, a charging control module, a substrate Select modules and sequence control modules. The invention can effectively solve the problem of equalizing the charging capacities of two cells caused by the charging of the traditional serial batteries, ensure that the two batteries can be fully charged effectively, and greatly improve the service life of the battery pack. The present invention can effectively solve the problem that the input power voltage of the whole system is high due to the high voltage of the batteries connected in series in traditional series charging, which limits the use of low-voltage occasions, especially the use of the commonly used USB system. The parallel structure of the present invention can solve this problem very well. The problem is that the input power can use a low-voltage 5V power supply, which makes the current common USB system possible.

Description

technical field [0001] The invention belongs to the field of battery circuit design, in particular to a circuit structure suitable for parallel charging and series use of batteries. Background technique [0002] A lithium battery is a battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution, so this battery is also called a lithium metal battery. Unlike other batteries, Li-ion batteries have the characteristics of high charge density, long life and high unit cost. Small lithium batteries are commonly used in small portable electronic devices such as PDAs, watches, video cameras, digital cameras, thermometers, calculators, computer BIOS, communication equipment, and remote car locks. Lithium batteries' high current, high energy density, and ability to sustain high voltages for longer periods of time than alkaline batteries make lithium batteries a particularly attractive option. [0003] At present, the ...

AI Technical Summary

Problems solved by technology

[0006] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a circuit structure suitable for parallel charging and series use of batteries, which is used to solve the problem of high power supply voltage caused by battery series charging in the prior art that limits its use. , and the problem of insufficient charge balance caused by charging batteries in series

Images