OCV-SOC-Temperature Relationship Construction and State of Charge Estimation for a Series– Parallel Lithium-Ion Battery Pack
Harbin Institute of Technology · Chongqing University of Technology · +2 more institutions
Abstract
Accurate state of charge (SOC) estimation of a battery pack is more meaningful than that of a cell in practical applications. The existing methods are difficult to provide an accurate SOC of a battery pack under a wide range of temperature due to cell inconsistency. In this paper, a SOC estimation method for a series-parallel lithium-ion battery pack based on the newly constructed OCV-SOC-temperature relationship was proposed. In the proposed method, firstly the cosine similarity is used to quantify cell inconsistency and the representative cells in the battery pack are determined by the largest cosine similarity value. Secondly, the OCV-SOC curves of the representative cells at different temperatures are used…
Citation impact
- FWCI
- 20.36
- Percentile
- 100%
- References
- 43
Authors
5Topics & keywords
- Battery pack
- State of charge
- Battery (electricity)
- Lithium-ion battery
- Equivalent circuit
- Engineering
- Taylor series
- Voltage
- Affordable and clean energy