Method and device for cascade utilization battery energy storage system decline assessment
A battery energy storage system and battery energy storage technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problem of long offline detection time, high scrapping rate of energy storage units, and online monitoring of key parameters of battery energy storage units Insufficient and other problems, to achieve the effect of accurate positioning
Active Publication Date: 2022-06-17
NORTH CHINA ELECTRICAL POWER RES INST +2
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Problems solved by technology
[0005] At present, the evaluation of the decline state of the battery energy storage unit in the cascade utilization battery energy storage system is mainly laboratory evaluation and offline testing. Insufficient online monitoring of key operating parameters, unable to accurately grasp key characteristic variables reflecting defects, faults and health status, and unable to accurately locate decaying energy storage units
In addition, the offline detection time is long, and the scrap rate of the battery energy storage unit under test is high, which makes it impossible to quickly locate the decaying energy storage unit
[0006] Therefore, the existing cascaded utilization battery energy storage system decline assessment method has the problem of not being able to quickly and accurately locate the decaying energy storage unit
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[0035] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention more clearly understood, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but not to limit the present invention.
[0036] figure 1 The implementation process of the decay assessment method for the cascade utilization battery energy storage system provided by the embodiment of the present invention is shown. For the convenience of description, only the part related to the embodiment of the present invention is shown, and the details are as follows:
[0037] like figure 1 As shown, the decay assessment method of the cascade utilization battery energy storage system, which includes:
[0038] Step 101, online collection of characteristic parameters of the battery e...
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The invention discloses a method and device for cascade utilization of a battery energy storage system. The method includes: online collection of characteristic parameters of battery energy storage units; energy unit; analyze the external characteristic parameters of the battery module to determine the first battery module; analyze the internal characteristics of the battery cell to determine the lithium ion loss value and active material loss value of the battery cell; and then determine the decay state of the battery cell . The present invention collects the characteristic parameters of the battery energy storage unit online, analyzes the external characteristics of the battery energy storage unit to be detected, and then analyzes the internal characteristics of the battery cells in the first battery module to analyze the internal and external characteristics of the energy storage unit, thereby Finally, the decay state of the battery cell is determined, and the decayed energy storage unit can be quickly and accurately located.
Description
technical field [0001] The invention relates to the technical field of cascade utilization batteries, in particular to a method and device for evaluating the decline of a cascade utilization battery energy storage system. Background technique [0002] This section is intended to provide a background or context to the embodiments of the invention recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] When the remaining capacity of the battery falls below 80% of the nominal capacity, it is generally considered that it is no longer suitable for continued use in electric vehicles. With the country's strong promotion of the electric vehicle industry, the number of retired batteries in my country's electric vehicles has increased exponentially since 2014. As one of the main disposal methods after the recycling of retired batteries, the cascade utilization of retired batteries has become a business that various batte...
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IPC IPC(8): G01R31/392G01R31/396G01R31/367
CPCG01R31/392G01R31/396G01R31/367
Inventor 王开让邵尹池刘辉李娜巩宇董建明蔡建明张宇航
Owner NORTH CHINA ELECTRICAL POWER RES INST