Battery pack circuit resistance monitoring device and method

Abstract

The invention provides a battery pack circuit resistance monitoring device, which includes an intelligent control unit, a voltage acquisition unit, a current test unit, a pure resistance load unit, a communication interface unit, a data processing unit and a fault alarm unit. The present invention also provides a method for monitoring the circuit resistance of the storage battery pack, which includes connecting to the circuit resistance monitoring device of the storage battery pack, setting parameters; adjusting the intelligent control unit, and starting the test of the circuit resistance of the storage battery pack; analyzing the test results, and if there is no abnormality in the test data , it will be stored in the battery loop resistance database; if the test result is abnormal, an alarm message will be issued. The invention can realize the on-line timing test of the circuit resistance of the storage battery group, which directly detects the resistance of the entire series circuit of the storage battery group, and judges the change trend of the circuit resistance of the storage battery group through the longitudinal comparison of multiple measurement data, and finds the abnormality of the circuit of the storage battery group in time. Ensure that the battery pack can provide reliable power supply.

Description

technical field [0001] The invention relates to the technical field of battery monitoring, in particular to a battery pack circuit resistance monitoring device; at the same time, the invention also relates to a battery pack circuit resistance monitoring method. Background technique [0002] With the continuous construction and development of modern large-scale power projects such as large-unit power plants and UHV substations, the DC power system, which is the lifeblood of large-scale power plants and stations, has an important impact on the safe operation of the power grid and the stable development of the country. The DC power supply system is an important part of the power supply system of power plants and substations. It provides reliable power supply for the secondary systems and equipment of power plants and stations, such as relay control protection devices, automatic control devices, circuit breaker opening and closing mechanisms, metering, communication, and emergenc...

AI Technical Summary

Problems solved by technology

At present, there are two main methods for detecting the internal resistance of the battery pack. One is that the maintenance team regularly conducts internal resistance testing on the battery pack. Each set of batteries generally requires 104 batteries. One maintenance team needs to be responsible for multiple substations in the jurisdiction. The internal resistance detection of the battery pack requires a lot of time, manpower, and material resources, and it is often lack of pertinence, and a lot of useless work is done; the other is to use the battery pack online detection device to detect the internal resistance of the battery. In this method, each battery All groups need to test the wiring, the wiring is complicated and messy, and there is currently no unified specification and standard constraint on the online detection device of the battery pack, the test method is not uniform, the reliability of the test data of the internal resistance is low, and some devices cannot effectively detect the connection strip. The resistance

Moreover, most of the battery packs in the current DC power supply system adopt the power supply mode of multi-series series, and there is a "barrel effect", that is, the failure of any battery or the looseness of any connector will directly affect the normal power supply of the whole battery pack. , and then cause power outages to expand accidents

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