{"title":"The Technology Innovation of Hybrid Electric Vehicles: A Patent-Based Study","authors":"Yan Zhu, Jie Wu, Oleg Gaidai","doi":"10.3390/wevj15080329","DOIUrl":null,"url":null,"abstract":"A hybrid electric vehicle (HEV) is a relatively practical technology that has emerged as electric vehicle technology has gradually matured. The analysis of the HEV patent lifecycle is crucial for understanding its impact on the development of this technology. This lifecycle tracks the progress of HEV technologies from their inception and patenting, through their market adoption, and to the expiration of their patent protection. In this study, we aimed to evaluate the technology lifecycle of the HEV industry using the growth S-curve method. The purpose of this study is to describe the technological lifecycle trajectory and current stage of the HEV industry, as well as the technical stages of each sub-technology, to facilitate better decision making. As part of this study, we used patent family data collected from the Derwent Innovation Index database from 1975 to 2022 and established an S-curve model for HEVs and their sub-technologies using logistic regression. In 2022, the technological maturity of HEVs reached 44%. The sub-technologies with the most substantial diffusion capabilities are energy management, propulsion systems, and cooling circuits. According to predictions, the saturation period for the patent family quantity related to HEVs is estimated to be around 53 years.","PeriodicalId":38979,"journal":{"name":"World Electric Vehicle Journal","volume":null,"pages":null},"PeriodicalIF":2.6000,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"World Electric Vehicle Journal","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3390/wevj15080329","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
A hybrid electric vehicle (HEV) is a relatively practical technology that has emerged as electric vehicle technology has gradually matured. The analysis of the HEV patent lifecycle is crucial for understanding its impact on the development of this technology. This lifecycle tracks the progress of HEV technologies from their inception and patenting, through their market adoption, and to the expiration of their patent protection. In this study, we aimed to evaluate the technology lifecycle of the HEV industry using the growth S-curve method. The purpose of this study is to describe the technological lifecycle trajectory and current stage of the HEV industry, as well as the technical stages of each sub-technology, to facilitate better decision making. As part of this study, we used patent family data collected from the Derwent Innovation Index database from 1975 to 2022 and established an S-curve model for HEVs and their sub-technologies using logistic regression. In 2022, the technological maturity of HEVs reached 44%. The sub-technologies with the most substantial diffusion capabilities are energy management, propulsion systems, and cooling circuits. According to predictions, the saturation period for the patent family quantity related to HEVs is estimated to be around 53 years.
混合动力电动汽车(HEV)是随着电动汽车技术的逐渐成熟而出现的一种相对实用的技术。对混合动力汽车专利生命周期的分析对于了解其对该技术发展的影响至关重要。该生命周期跟踪 HEV 技术从诞生到获得专利,再到市场应用,直至专利保护到期的整个过程。在本研究中,我们旨在利用增长 S 曲线法评估混合动力汽车行业的技术生命周期。本研究的目的是描述混合动力汽车行业的技术生命周期轨迹和当前阶段,以及各子技术的技术阶段,以便更好地做出决策。作为本研究的一部分,我们使用了从德文特创新指数数据库中收集的 1975 年至 2022 年的专利族数据,并利用逻辑回归法建立了 HEV 及其子技术的 S 曲线模型。2022 年,混合动力汽车的技术成熟度达到 44%。推广能力最强的子技术是能源管理、推进系统和冷却电路。根据预测,与混合动力汽车相关的专利族数量的饱和期估计约为 53 年。