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CELL DETERIORATION DIAGNOSTIC METHOD AND CELL DETERIORATION DIAGNOSTIC DEVICE 新技術説明会

外国特許コード F160008867
整理番号 (S2015-0318-N0)
掲載日 2016年10月5日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2016JP055374
国際公開番号 WO 2016136788
国際出願日 平成28年2月24日(2016.2.24)
国際公開日 平成28年9月1日(2016.9.1)
優先権データ
  • 特願2015-033944 (2015.2.24) JP
発明の名称 (英語) CELL DETERIORATION DIAGNOSTIC METHOD AND CELL DETERIORATION DIAGNOSTIC DEVICE 新技術説明会
発明の概要(英語) Provided are a cell deterioration diagnostic method and a cell deterioration diagnostic device which are relatively inexpensive and practical. The cell deterioration diagnostic method for diagnosing the cell deterioration of a secondary cell having transient properties is characterized by including: a charging step for charging a secondary cell; a computation step for integrating a potential difference obtained by subtracting the cell internal voltage V0 from the cell inter-terminal voltage during a process in which the cell inter-terminal voltage of the secondary cell converges on the cell internal voltage V0 of the secondary cell after completion of charging, and calculating the integral value of the potential difference; and a diagnosis step for diagnosing the cell deterioration of the secondary cell on the basis of the integral value.
従来技術、競合技術の概要(英語) BACKGROUND ART
The secondary battery, particularly a lithium ion secondary battery, since the internal impedance is small, a high current during the short-circuit fault occurs with the risk of causing fire. For this reason, the lithium ion secondary battery, the voltage range of the charge and discharge determined strictly, voltage, current, such as by the device for monitoring the surface temperature of the charge-discharge control is performed, an abnormal operation is suppressed.
Incidentally, the characteristics of the lithium ion secondary battery, also depending on the battery deterioration. However, the protective device is in the degradation of the battery of the lithium ion secondary battery cannot be diagnosed, a protection device is not functional in the lithium ion secondary battery are technical accident such as ignition. Therefore, in order to prevent accidents due to battery deterioration, in order to diagnose the degradation of the battery, a lithium ion secondary battery at a proper timing needs to be replaced.
The degradation of the battery of the lithium ion secondary battery as a method for diagnosing, by the method of using a dedicated instrument superimposed voltage battery deterioration diagnostic method has been known. However, the battery degradation diagnosis method, a dedicated device is expensive, since the lithium ion secondary battery is connected to a device using a detached from the device due to the need, the versatility.
In addition, the lithium ion secondary battery of a battery degradation diagnosis as another method, the voltage of the lithium ion secondary battery is in operation, the internal impedance of the current waveform is derived, based on the internal impedance of the battery deterioration diagnosis method of a battery degradation diagnosis has been known (for example, see Non-Patent Document 1). However, the battery degradation diagnosis method, the charging rate (SOC) of dependency on the large, the problems of accuracy and the like, has not been practical.
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • THE DOSHISHA
  • 発明者(英語)
  • NAGAOKA NAOTO
  • YOSHIOKA NAOYUKI
  • NARITA NAOYA
国際特許分類(IPC)
指定国 National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JP KE KG KN KP KR KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG

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