3-series 2-parallel Li-ion battery pack protecting board

Abstract

The invention discloses a 3-series 2-parallel Li-ion battery pack protecting board. The protecting board is formed by combining a rigid printed circuit board PCB and a flexible printed circuit board PCB; the FPC undertakes the circuit connection of a 3-series 2-parallel Li-ion battery pack. The protecting board is provided with a protecting circuit, and the protecting circuit comprises a basic protecting function, a second-grade protecting function, a senior charging control, an advance charging function, a voltameter function , balance function and other circuit modules. The 3-series 2-parallel Li-ion battery pack protecting board is simple and new in structure and reasonable in circuit design; the 3-series 2-parallel Li-ion battery pack protecting board meets the electrical connection ofan electric core, forms an effective safety protection to the use of the Li-ion battery, and greatly reduces the happening of safety accident of the battery, thus the safety of the Li-ion battery isimproved. The protecting board can communicate with a PC upper computer through an SMBus interface and is convenient to monitor the Li-ion battery and realize the man-machine interaction; the 3-series2-parallel Li-ion battery pack protecting board has wide market application prospect, enriches user experience and is significant to produce and practice.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery pack protection boards, in particular to a 3-series 2-parallel lithium-ion battery pack protection board. Background technique [0002] At present, as an energy source, lithium batteries have the advantage of high energy density and relatively stable performance. However, traditional small portable power supplies are mostly combined in series and parallel with round batteries as units. Compared with circular batteries, polymer lithium batteries have the characteristics of good safety performance, thin thickness, light weight, large capacity, low internal resistance, customizable shape, and high discharge platform, and are more and more widely used in various fields. Because the quality of lithium battery cells is not easy to grasp during mass production, there are slight differences in the parameters of the battery cells when they leave the factory, and with the operating environment,...

AI Technical Summary

Problems solved by technology

Because the quality of lithium battery cells is not easy to grasp during mass production, there are slight differences in the parameters of the battery cells when they leave the factory, and with the operating environment, aging and other factors, the inconsistency between multiple parallel batteries will become more and more obvious, and the battery efficiency and life will also change. Poor, coupled with overcharge or overdischarge, etc., may lead to safety problems such as fire and combustion in severe cases

At present, the small power supply circuits on the market are complex, and even series and parallel wires are required for assembly. In addition, the protection circuit for battery protection and monitoring reliability is not high, and safety problems such as explosion and combustion may occur from time to time.

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