On such basis, a capacity consistency evaluation method of lithium-ion battery packs is proposed using magnetic field feature extraction and k -nearest neighbors ( k -NNs), and the effectiveness of the method is verified by experimental testing.
The results show that the proposed method can accurately diagnose the capacity consistency of the tested battery pack, which provides a basis for battery pack performance testing and maintenance. The capacity inconsistency among commercial lithium-ion battery packs is an important factor affecting their service life.
First, the capacity of each cell in the battery pack Qi, the difference in remaining chargeable capacity of each cell when the battery pack reaches the charge cutoff condition Qdi, and the internal resistance of each cell Ri are determined to accurately characterize the battery pack consistency.
Currently, the battery pack consistency evaluation indicators are unclear and are roughly divided into single-parameter and multi-parameter evaluations. Single-parameter evaluation usually uses voltage or SOC to characterize the consistency of the battery pack .
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Accurate consistency diagnosis of series-connected battery packs is crucial for the safety management of lithium-ion batteries. However, traditional methods for extracting and …
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Please cite this article in press as: Zhang C et al. Study on battery pack consistency evolutions and equilibrium diagnosis for serial- connected lithium-ion batteries.
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In practical applications, the voltage or capacity of a single lithium-ion battery is insufficient to meet the system''s requirements for indicators such as capacity, power, and output voltage. …
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References (39) Abstract Accurate consistency diagnosis of series-connected battery packs is crucial for the safety management of lithium-ion batteries.
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The capacity inconsistency among commercial lithium-ion battery packs is an important factor affecting their service life. However, there is still a lack of detection methods to …
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During the service process of lithium-ion battery packs, there is inconsistency among the cells in the pack, resulting in a significant decline in battery performance and …
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During the service process of lithium-ion battery packs, there is inconsistency among the cells in the pack, resulting in a significant decline in bat…
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Explore the importance of cell consistency in lithium battery packs. Learn how inconsistency in capacity, voltage, and resistance leads to degradation, safety risks, and early failure.
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Lithium solar battery battery pack consistency means that the voltage, capacity, internal resistance, lifetime, temperature effect, self-discharge rate and other parameters …
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Abstract: This study takes a large-capacity power station of lithium iron phosphate battery energy storage as the research object, based on the daily operation data of battery packs in the …
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