Battery online monitoring and maintenance system

Abstract

The invention discloses a battery online monitoring and maintenance system. The system comprises an isolated power source, a microprocessor, a communication chip, a pulse module, a charging module, ameasuring module and a discharging module. The isolated power source is used for eliminating voltage clutter. The pulse module, the charging module and the discharging module are respectively connected to the microprocessor and are controlled by the microprocessor. Output ends of the pulse module, the charging module and the discharging module are respectively connected to a battery. A first dataacquisition end of the measuring module is connected to the battery. A second data acquisition end of the measuring module is connected to the discharging module. An output end of the measuring moduleis connected to the microprocessor. The microprocessor acquires the voltage, temperature, internal resistance, dynamic load voltage, dynamic discharge current and a dynamic discharge coefficient or dynamic discharge power or dynamic discharge energy of the battery. The microprocessor is connected to the communication chip. The system can monitor many kinds of parameters on line, is installed in adistributed installation way and realizes the online voltage equalization and the online high-frequency pulse anti-vulcanization maintenance.

Description

technical field [0001] The invention relates to a battery monitoring technology, in particular to an online battery monitoring and maintenance system. Background technique [0002] Battery on-line measurement and monitoring technology has been widely used, such as battery on-line monitoring technology has been widely used in power substations. In recent years, battery on-line voltage equalization and on-line activation technologies have also been applied experimentally, but the devices are complex and lack in practicability, so they have not been popularized. [0003] The battery online monitoring technology that has been applied at present mainly has the following deficiencies: [0004] 1) From the perspective of the nature of battery technology, for the sealed valve-regulated lead-acid battery (VRLA, valve-regulated lead-acid battery) that is widely used in substation DC systems, the academic community cannot provide an accurate physical model. The characteristics of the...

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Problems solved by technology

[0004] 1) From the perspective of the nature of battery technology, for the sealed valve-regulated lead-acid battery (VRLA, valve‐regulated lead‐acid battery) that is widely used in substation DC systems, the academic community cannot provide an accurate physical model. The battery characteristics of manufacturers are different, and the characteristics of the battery are different in different operating periods. However, the currently applied battery online monitoring system uses a unified technical method to measure the characteristics of the battery. Obviously, there are large errors in the measurement accuracy.

[0005] 2) Most of the battery online monitoring systems that have been applied at present stay in the battery parameter measurement and monitoring stage, and the types of parameters measured are few, generally only including battery voltage, battery temperature and battery internal resistance, the accuracy is generally poor, and the repeatability is poor

[0006] 3) The installation structure of the battery online monitoring system that has been applied at present is generally divided into distributed (represented by LEM in Switzerland) and centralized (represented by Hangzhou Gaote); distributed: each battery is equipped with a battery online monitoring system , short wiring, good measurement accuracy, good stability, intuitive and convenient maintenance, and easy to realize multiple functions, but the cost is high, and it only has measurement and monitoring functions, not maintenance functions; centralized: generally 27 batteries share one battery online monitoring System, the cost is low, but the connection is long, the measurement accuracy is affected, and the maintenance is complicated

[0007] 4) The battery online monitoring system that has been applied at present lacks technical means for automatic maintenance of batteries in operation, and the battery online voltage equalization and online activation technologies are only realized on experimental equipment. Such devices are generally expensive and complex in structure. It is lacking in extensive industrialization and practical use

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