Uninterruptible power supply system using lithium battery

Abstract

The invention relates to an uninterruptible power supply system using a lithium battery. The system comprises a battery control unit, a battery monitoring unit, a high-voltage unit and a remote terminal unit, parameters such as open-circuit voltage and temperature of a battery pack are monitored in real time through the battery monitoring unit, and the parameters are sent to the battery control unit in real time through a CAN bus after being converted by an MCU in a BMU. The high-voltage unit measures the total voltage, current and insulation resistance state and sends the state to the batterycontrol unit. The battery control unit estimates SOC, SOH and other state information of each battery cell of the battery pack, controls the battery monitoring unit to balance the residual electric quantity of each battery cell, is connected with the UPS cabinet through a dry contact, and controls a rectifier and an inverter to be respectively connected with a power grid and a load in different modes to complete the charging and discharging work of the system. According to the invention, modular management is realized, the working performance of the energy storage system is improved, the costis reduced, managers can conveniently know and master the state of the battery system in real time, and convenience is provided for system maintenance and function expansion in the future.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and in particular relates to an uninterruptible power supply (UPS) system using a lithium battery. Background technique [0002] With the rapid development of science and technology, the scale of strategic emerging industries such as artificial intelligence, 5G, the Internet of Things, energy conservation and environmental protection, and new energy vehicles has expanded rapidly, and its core equipment has developed in the direction of intelligence and integration. The safety problems and energy consumption problems of these key equipment are also gradually emerging, and the stability of the power supply system directly affects the stable operation of the equipment. Large-scale R&D and manufacturing plants require high-quality and reliable power supplies. Loss of power, or even a small drop in power quality, may result in scrap production, and even cause some machines to restart or dama...

AI Technical Summary

Problems solved by technology

Large-scale R&D and manufacturing plants require high-quality and reliable power supplies. Power failure or even a slight drop in power supply quality may lead to production waste, and even cause some machines to restart or parts to be damaged, resulting in huge economic losses.

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