Battery cluster fault diagnosis method and device, terminal equipment and storage medium
A fault diagnosis and battery cluster technology, which is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables, etc., can solve the problems of low accuracy and low accuracy of fault diagnosis results of battery clusters, achieve high accuracy, and increase test reliability performance and improve the accuracy
Pending Publication Date: 2022-05-06
SUNGROW ENERGY STORAGE TECH CO LTD
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Problems solved by technology
[0005] The main purpose of the present invention is to provide a fault diagnosis method, device, terminal equipment and storage medium for battery clusters, aiming to solve the problem that the accuracy of impedance detection of battery clusters is low in the existing methods in the prior art, resulting in battery The technical problem of low accuracy of cluster fault diagnosis results
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[0071] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0072] refer to figure 1 , figure 1 It is a schematic structural diagram of a terminal device in the hardware operating environment involved in the solution of the embodiment of the present invention.
[0073] Generally, a terminal device includes: at least one processor 301, a memory 302, and a battery cluster fault diagnosis program stored on the memory and operable on the processor, and the battery cluster fault diagnosis program is configured to ...
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The invention discloses a fault diagnosis method for a battery cluster. The method comprises the steps of obtaining a target temperature of a target battery cluster; a target impedance spectrum curve corresponding to the target temperature is determined in a preset curve library, the preset curve library comprises impedance spectrum curves corresponding to different temperatures, each impedance spectrum curve is obtained according to alternating current excitation currents of different frequencies, and the alternating current excitation currents of different frequencies are obtained from an external power grid; and obtaining a fault diagnosis result of the target battery cluster according to the target impedance spectrum curve. The invention further discloses a battery cluster fault diagnosis device, terminal equipment and a storage medium. By using the method of the invention, the target impedance spectrum curve is excited by AC / AC current, disturbance to a DC system can be reduced, test reliability can be increased, the accuracy of the target impedance spectrum curve is high, and the accuracy of the obtained fault diagnosis result is high.
Description
technical field [0001] The invention relates to the technical field of battery detection, in particular to a battery cluster fault diagnosis method, device, terminal equipment and storage medium. Background technique [0002] The battery cluster is composed of multiple battery modules connected in series and parallel. The batches of the cells in the battery cluster will be different, and the initial capacity and impedance of each battery cell will also be slightly different. These factors affect the impedance of each battery cluster. are obvious and can have serious consequences if not recognized and diagnosed. [0003] In the related technology, the energy storage converter is used to integrate the direct current of the battery cluster itself into alternating current through the battery management system, charge and discharge the battery cluster, and perform impedance detection on the battery cluster during the charging and discharging process of the battery cluster, so as ...
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Login to View More IPC IPC(8): G01R31/389
CPCG01R31/389
Inventor 董普云钱超贺伟邵俊伟
Owner SUNGROW ENERGY STORAGE TECH CO LTD