Online detection method of storage battery open-circuit fault

Abstract

The invention discloses an online detection method of storage battery open-circuit fault, and belongs to the field of the circuit detection. The method comprises the following steps: sending out a testing command when a device arrives a predetermined time, and detecting program running; accumulator abnormal program: device fault program: detecting the beginning of the program running, immediatelystopping testing if the detection voltage is not less than 210C and current is equal to 0A, wherein a judging result is that the device is abnormal, and giving a device fault alarm to a background; second delay: starting a second delay relay when the system starts the detection, wherein a second delay relay contact is directly connected to a ZJ2 control loop, the relay directly act to turn off theload when the system in abnormity cannot control the load to turn off, thereby preventing the accumulator from being discharge or overheating for a long time due to device crash or like abnormities.When an instrument disclosed by the invention is used for detection, the actual load is provided for the accumulator, thereby accurately judging whether the accumulator has the load carrying capacity,and the detection cycle can be set at will; the working time is short, and the operation is free from working personnel.

Description

technical field [0001] The invention relates to an online detection method for an open-circuit fault of a storage battery pack, and relates to the field of circuit detection. Background technique [0002] Once the battery pack in operation has an open circuit, the backup power supply of the power supply system will be paralyzed in the event of an AC power failure or other accidents, resulting in equipment outage and other major operational accidents. In recent years, with the widespread use of valve-regulated sealed lead-acid batteries in power systems, accidents caused by battery failures have occurred from time to time, even causing fires and power outages in the entire station. Due to individual differences and inconsistencies in the health status of the battery pack operated by series batteries, the battery voltage is inconsistent under the same discharge and charging current, and it is inevitable that the performance of individual batteries will decline, resulting in op...

AI Technical Summary

Problems solved by technology

[0012] In view of this, the purpose of the present invention is to provide an online detection method for the open circuit fault of the storage battery pack. In view of the fact that the current instrument measurement cannot accurately determine whether the storage battery has a load-carrying capacity, the checking charge and discharge test of the storage battery is carried out regularly, which cannot be done online. And there are certain limitations, it cannot guarantee that the battery will not have the defect of open circuit failure in the next test cycle

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