Research on consistency of Grouped lithium batteries Based on Capacity Increment Curve

Qian, Dongpei; Hong, Jie; Wang, Jionggeng; Dong, Dong; Zhou, Yue; Tian, Yu; Sheng, Weixiong; Xu, Junjie; Yan, Xiao; Liu, Zhongcai; Liu, Dong

doi:10.1145/3366194.3366332

Cited by 1 publication

(1 citation statement)

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“…From the time order, the inconsistency of the single cell in the battery pack is mainly reflected in the inconsistency in the manufacturing process and the use process. Due to the immaturity of the preparation process, the state control of raw materials and the state control of production process equipment will lead to the inconsistency of single cell 1] . On the other hand, the inconsistency will become more significant due to the cycle aging of the battery during use.…”

Section: Introductionmentioning

confidence: 99%

Research on the Capacity of Li-ion Battery Packer Based on Capacity Incremental Curve

Tian¹,

Zhu²,

Liu³

et al. 2021

E3S Web Conf.

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Lithium ion battery is the most widely used and reliable power source for electric vehicles. With the development of electric vehicles, the safety, energy density, life and reliability of lithium ion batteries have been continuously improved. However, in the field of vehicle power battery technology, battery monomers are combined in series and parallel to provide enough energy, but one of the major problems faced by group batteries is the consistency between battery monomers. Taking the capacity increment curve (IC curve) of lithium iron phosphate battery as the analysis tool, it is found that the characteristic peak of IC curve of different monomers in battery pack can reflect the relationship of monomer capacity. On this basis, the mathematical model is established, and the IC curve II peak characteristic point of a single cell are used as the reference to characterize the capacity of the single cell one by one. The results show that the method can be used in the normal charging process of the battery pack, and the capacity of the single cell in the battery pack can be characterized in real time during the whole life of the battery pack. It has certain research value for the ladder utilization and accurate management of battery pack.

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Section: Introductionmentioning

confidence: 99%