u003cpu003e Underground UPS power supply in coal mines is an important equipment to ensure the operation of related safety monitoring and life support devices after a temporary power failure or safety accident occurs in the coal mine. The continuous and reliable operation of life support equipment is an important survival basis for underground workers in distress. Therefore, it is imperative to develop a power supply system that meets the requirements of coal mine safety regulations and is suitable for use in catastrophic environments. The coal mine underground UPS power supply battery management system is mainly composed of: single battery monitoring, protection system, charge and discharge control system, SOC estimation system, battery balance management system, data communication system, display system and network management system. The system uses the bus structure shown in Figure 1. u003c/pu003eu003cpu003eu003cpu003eu003c/pu003e The battery management technology of lithium batteries mainly began at the beginning of this century and is now in its infancy. Early battery management systems generally only had simple functions such as monitoring battery voltage, temperature, current, and protection. With the widespread application of batteries in various industries, the complexity and variety of use environments and the continuous improvement of technical requirements for use, battery management technology has been greatly developed. According to the actual needs of coal mines and the requirements of relevant industry standards, the management system of large-capacity batteries for mines mainly has the following functions: battery external environmental information monitoring system, battery capacity estimation system, battery pack
performance self-check system, battery equalization system Wait. At present, most of the battery management technologies in underground coal mines are relatively mature. The core of the technology lies in: u003cpu003e1) The technology of battery pack charging and discharging balance;u003c/pu003eu003cpu003e2) The performance of single cells in the battery pack Rapid identification technology for changes; u003cpu003e3) Technology for determining the overall capacity and performance degradation of the battery pack;u003c/pu003eu003cpu003e4) Due to the limitation of the power supply box in the coal mine, the power management does not have the heat dissipation conditions. The temperature needs to be precisely controlled;u003c/pu003eu003cpu003e5) SOC estimation algorithm;u003c/pu003eu003cpu003e6) breakthrough in networked intelligent management technology. u003cpu003eu003c/pu003eu003c/pu003eu003c/pu003eu003c/pu003eu003c/pu003e
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