Low temperature heating methods for lithium-ion batteries: A state-of-art review based on knowledge graph

With the swift electrification of mobility and transportation, low temperature heating methods (LTHM) have garnered widespread attention and have significantly advanced in enhancing the low-temperature adaptability of power batteries. In order to reveal the global research progress and hot trends of LTHM for power batteries, different from the existing human-experienced literature review, knowledge graphs of LTHM for power batteries based on bibliometrics are conducted in this paper. The research on LTHM for power batteries is analyzed qualitatively and quantitatively focusing on the volume of published papers, keywords, burst terms, technical characteristics and heating models. Wherein, China is the country with the largest publication frequency and centrality contribution in this field. Global scholars have formed research hotspots mainly on lithium batteries, heating properties, phase change materials, anode materials and thermal management. The heating methods are categorized into three types: internal, external and combined heating methods, with the heating rates distributed in 0.5–5 °C/min mostly. The internal heating methods exhibit higher heating rates compared to external heating methods on the whole. However, the practical application is constrained by several factors, including lifespan influence, securities, and immature technology. Furthermore, the modeling methods and parameter identification methods for theoretical models of the internal heating methods differ for different heating methods. For alternative current heating, without restricting safety limits, larger current amplitudes can result in more rapid heating rates. Finally, based on the current research status, some prospects for the future have been made.