Management system for mining explosion-proof and intrinsically safe lithium-ion battery power supply

Abstract

The invention relates to a management system for mine explosion-proof and intrinsically safe lithium-ion storage battery power supply, comprising a pair of input and output ports (PC-, B+) and a battery connected between the pair of input and output ports (PC-, B+) The main circuit composed of units, the battery unit is a battery pack composed of multiple lithium-ion rechargeable batteries connected in series; the battery unit is connected with a protection circuit BMS; the protection circuit includes an overcharge protection and charging conversion circuit, an overdischarge protection And the discharge conversion circuit, the positive and negative ends of each battery of the battery unit are respectively connected to a balanced charging circuit and an overcurrent protection circuit; during the charging and discharging process, when the charging voltage of any battery exceeds the set charging limit When the voltage is high, the main circuit can be disconnected; so that the battery pack will not cause damage to the entire battery pack due to overcharging or over-discharging of a single battery. In addition, in the event of overcurrent or short circuit, the main circuit can also be disconnected quickly, thus providing multiple protections for the battery pack. At the same time, it can evenly charge each battery cell in the battery pack, so that the charging voltage of each battery cell after charging is basically consistent, which improves the charge retention capacity of the entire battery pack and improves the overall performance of the battery pack. It is especially suitable for power batteries composed of more than four lithium-ion batteries connected in series.

Description

technical field [0001] The invention relates to a protection circuit of a lithium-ion rechargeable battery, in particular to a conversion charging protection circuit used together with a rechargeable battery group. Background technique [0002] With the development of the coal industry and the advancement of mining equipment technology, safety monitoring systems, emergency rescue equipment, underground transport vehicles, etc. have higher and higher requirements for explosion-proof power supplies. The equipment protected by enclosure "d" clearly prohibits the use of batteries with the risk of hydrogen evolution in flameproof enclosures. In order to meet the urgent needs of current coal mine equipment, on the basis of full research, repeatedly soliciting opinions from various experts and conducting relevant experimental research, this invention is a combination of current mature lithium-ion battery products and developed for the characteristics of mine systems. A new managem...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a mine explosion-proof and intrinsically safe lithium-ion battery power supply management system to solve the problem that when multiple lithium-ion batteries are used in series under the mine, due to the performance differences between the battery cells, it is easy to be damaged by a single battery. The overcharge or overdischarge of the battery causes the problem of damage to the entire battery pack, and solves the problem of charge and discharge control and conversion between the battery packs used in non-parallel connection

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