A lead-acid storage battery online monitoring, maintenance and early warning system and a performance evaluation method

Abstract

The invention provides a lead-acid storage battery online monitoring, maintenance and early warning system and a performance evaluation method. The system comprises an S7400CPU module, an ET200 distributed IO, a direct current voltage transmitter, a direct current current transmitter, a PT100 temperature sensor, an internal resistance testing switch, a series resistor, a battery charging switch and a battery charging system. The method analyzes the failure performance of a storage battery based on a control model method of an artificial neural network control and ECS expert self-learning control system. The system is free of a single-chip microprocessor control chip and employs the Siemens S7400PLC and the distributed IO mode thereof and the transmitter mode is employed to convert collected signals to standard signals for PLC input; a comprehensive test analysis model for storage battery performance evaluation is put forward; the analysis model integrates methods for testing the voltage, the dispersion of the voltage and the internal resistance of a storage battery to perform analysis and evaluation of current performance of a storage battery, so that accurate storage battery performance parameter values can be obtained.

Description

technical field [0001] The invention relates to the technical field of monitoring and control of lead-acid batteries, in particular to an online monitoring and maintenance and early warning system and performance evaluation method for lead-acid batteries. Background technique [0002] The traditional way of maintaining lead-acid batteries is to do a capacity checking discharge once a year. During the two discharges, the working performance of the battery is out of control, and there are hidden dangers of accidents. At the same time, the service life of the battery is about eight years, which is far below the design life. [0003] There is a need for a system that can remotely monitor the state of the battery in real time and perform charging control. The Chinese patent with the publication number CN106532164N proposes a battery management system that can be remotely monitored. Generally, the on-site acquisition and control parts of this system use The control circuit board ...

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Problems solved by technology

The design structure of this method is also provided in the above-mentioned patents. However, this commonly used hardware method is not universal, the communication ability and interface versatility are not good, and the internal program generally cannot be changed. The interconnectivity is not good, and users have no flexibility in using it

[0004] Through the research on the failure mechanism and detection methods of valve-regulated lead-acid batteries, it can be concluded that valve-regulated lead-acid batteries are a very complex electrochemical system, and there is no simple method to test them except for the check discharge test. The real current performance parameters of the battery, which is why there is no instrument in the world that can directly test the performance parameters of the battery

Whether it is to test the battery terminal voltage or the internal resistance of the battery, it is an indirect method, and it is impossible to test the performance parameters, and it is not even possible to talk about a clear corresponding relationship.

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