JP2007311065A - 電池装置、これを搭載した車両、および電池装置の異常判定方法 - Google Patents

電池装置、これを搭載した車両、および電池装置の異常判定方法 Download PDF

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Publication number
JP2007311065A
JP2007311065A JP2006136559A JP2006136559A JP2007311065A JP 2007311065 A JP2007311065 A JP 2007311065A JP 2006136559 A JP2006136559 A JP 2006136559A JP 2006136559 A JP2006136559 A JP 2006136559A JP 2007311065 A JP2007311065 A JP 2007311065A
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Prior art keywords
battery
temperature
internal resistance
cell
detected
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Pending
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JP2006136559A
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English (en)
Japanese (ja)
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JP2007311065A5 (enExample
Inventor
Keiji Kaida
啓司 海田
Akio Ishioroshi
晃生 石下
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Toyota Motor Corp
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Toyota Motor Corp
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Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP2006136559A priority Critical patent/JP2007311065A/ja
Priority to PCT/JP2007/059659 priority patent/WO2007132729A1/ja
Priority to US12/226,974 priority patent/US20090130538A1/en
Priority to CN200780017362XA priority patent/CN101443673B/zh
Publication of JP2007311065A publication Critical patent/JP2007311065A/ja
Publication of JP2007311065A5 publication Critical patent/JP2007311065A5/ja
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/12—Recording operating variables ; Monitoring of operating variables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/374—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with means for correcting the measurement for temperature or ageing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/389—Measuring internal impedance, internal conductance or related variables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/545—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/547—Voltage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/549—Current
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/005—Testing of electric installations on transport means
    • G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/3644—Constructional arrangements
    • G01R31/3648—Constructional arrangements comprising digital calculation means, e.g. for performing an algorithm
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Secondary Cells (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
JP2006136559A 2006-05-16 2006-05-16 電池装置、これを搭載した車両、および電池装置の異常判定方法 Pending JP2007311065A (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2006136559A JP2007311065A (ja) 2006-05-16 2006-05-16 電池装置、これを搭載した車両、および電池装置の異常判定方法
PCT/JP2007/059659 WO2007132729A1 (ja) 2006-05-16 2007-05-10 電池装置、これを搭載した車両、および電池装置の異常判定方法
US12/226,974 US20090130538A1 (en) 2006-05-16 2007-05-10 Battery Apparatus, Vehicle Having the Same Mounted Thereon, and Failure Determining Method for the Battery Apparatus
CN200780017362XA CN101443673B (zh) 2006-05-16 2007-05-10 电池装置、装有该装置的车辆及电池装置的异常判定方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006136559A JP2007311065A (ja) 2006-05-16 2006-05-16 電池装置、これを搭載した車両、および電池装置の異常判定方法

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JP2007311065A true JP2007311065A (ja) 2007-11-29
JP2007311065A5 JP2007311065A5 (enExample) 2008-12-11

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JP2006136559A Pending JP2007311065A (ja) 2006-05-16 2006-05-16 電池装置、これを搭載した車両、および電池装置の異常判定方法

Country Status (4)

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US (1) US20090130538A1 (enExample)
JP (1) JP2007311065A (enExample)
CN (1) CN101443673B (enExample)
WO (1) WO2007132729A1 (enExample)

Cited By (19)

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WO2011045853A1 (ja) * 2009-10-14 2011-04-21 株式会社 日立製作所 電池制御装置およびモーター駆動システム
JP2012223046A (ja) * 2011-04-13 2012-11-12 Toshiba Mitsubishi-Electric Industrial System Corp 無停電電源装置および無停電電源システム
JP2012230886A (ja) * 2011-04-25 2012-11-22 Lg Chem Ltd バッテリーセルの作動寿命を向上させるバッテリーシステム及び方法
JP2013101868A (ja) * 2011-11-09 2013-05-23 Toshiba Corp 蓄電池劣化診断システムおよびその方法
JP2014120457A (ja) * 2012-12-19 2014-06-30 Denso Corp 電源装置
WO2015033694A1 (ja) * 2013-09-06 2015-03-12 日産自動車株式会社 バッテリパック冷却システム
WO2017159031A1 (ja) * 2016-03-18 2017-09-21 ソニー株式会社 二次電池充電装置、温度情報取得装置及び二次電池の充電方法、並びに、電気化学インピーダンス・スペクトルのその場計測方法
WO2018079164A1 (ja) * 2016-10-26 2018-05-03 日立オートモティブシステムズ株式会社 電池制御装置
JP2018110072A (ja) * 2017-01-04 2018-07-12 プライムアースＥｖエナジー株式会社 二次電池の制御装置及び二次電池の制御方法
JP2020174441A (ja) * 2019-04-09 2020-10-22 株式会社Ｓｕｂａｒｕ 温度センサの故障診断装置及び温度センサの故障診断方法
CN112537224A (zh) * 2020-11-30 2021-03-23 蜂巢能源科技有限公司 电池内阻异常识别方法、装置、存储介质及车辆
JP2021129403A (ja) * 2020-02-13 2021-09-02 株式会社デンソーテン 異常検出装置および異常検出方法
CN113533985A (zh) * 2021-06-28 2021-10-22 合肥国轩高科动力能源有限公司 一种电池包内阻异常模块的识别方法及其存储介质
KR20220034419A (ko) * 2020-09-11 2022-03-18 주식회사 엘지에너지솔루션 배터리 관리 시스템 및 저항 상태 추정 방법
CN114325401A (zh) * 2021-11-25 2022-04-12 华人运通(江苏)技术有限公司 一种电池性能参数确定方法、装置、设备及介质
WO2023100582A1 (ja) * 2021-11-30 2023-06-08 パナソニックＩｐマネジメント株式会社 電池異常検出システム、電池異常検出方法、及び電池異常検出プログラム
EP4228079A4 (en) * 2021-11-18 2024-02-21 Contemporary Amperex Technology Co., Limited BATTERY PACK AND POWER CONSUMPTION DEVICE THEREOF
KR102892948B1 (ko) * 2020-10-22 2025-11-27 주식회사 엘지에너지솔루션 배터리 장치 및 저항 상태 추정 방법
KR102892923B1 (ko) * 2020-10-21 2025-11-27 주식회사 엘지에너지솔루션 배터리 장치 및 저항 상태 추정 방법

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US8556011B2 (en) * 2007-11-01 2013-10-15 GM Global Technology Operations LLC Prediction strategy for thermal management and protection of power electronic hardware
JP5355966B2 (ja) * 2008-08-28 2013-11-27 三洋電機株式会社 車両用の電源装置
JP2010092775A (ja) * 2008-10-09 2010-04-22 Yamaha Motor Co Ltd 燃料電池システム
CN102771003B (zh) * 2010-09-27 2014-11-26 丰田自动车株式会社 电池控制系统
DE102010041492A1 (de) * 2010-09-28 2012-03-29 Robert Bosch Gmbh Verfahren und Anordnung zur Überwachung mindestens einer Batterie, Batterie mit einer solchen Anordnung sowie ein Kraftfahrzeug mit einer entsprechenden Batterie
FR2968842B1 (fr) * 2010-12-14 2014-10-31 Renault Sa Diagnostic d'une batterie de vehicule automobile
JP5556902B2 (ja) * 2010-12-24 2014-07-23 トヨタ自動車株式会社 電源システムおよびそれを搭載する車両、ならびに蓄電装置の制御方法
DE102011008376A1 (de) * 2011-01-12 2012-07-12 Audi Ag Verfahren zum Betrieb einer Bordnetzstruktur eines Kraftfahrzeugs
US20130294479A1 (en) * 2011-01-24 2013-11-07 Toyota Jidosha Kabushiki Kaisha Electric storage system
JP5770649B2 (ja) * 2012-01-27 2015-08-26 日野自動車株式会社 異常検出装置、ハイブリッド自動車および異常検出方法、並びにプログラム
JP5845932B2 (ja) * 2012-01-30 2016-01-20 富士通株式会社 文字列配置変更方法、プログラムおよび情報処理装置
US8981727B2 (en) 2012-05-21 2015-03-17 General Electric Company Method and apparatus for charging multiple energy storage devices
KR20140100287A (ko) * 2013-02-06 2014-08-14 현대자동차주식회사 친환경 자동차의 통합 전자전력 제어장치
WO2015029831A1 (ja) * 2013-08-30 2015-03-05 日本碍子株式会社 二次電池システムの異常発生部位を特定する装置、方法及びプログラム
WO2015029832A1 (ja) * 2013-08-30 2015-03-05 日本碍子株式会社 二次電池システムの異常発生部位を特定する装置、方法及びプログラム
CN103904381B (zh) * 2014-03-07 2017-04-05 清华大学 电池内部温度测量装置
CN105467324B (zh) * 2014-09-30 2020-03-03 株式会社杰士汤浅国际 电池劣化判定装置、电池劣化判定方法以及电池组
JP6387940B2 (ja) * 2015-10-22 2018-09-12 株式会社オートネットワーク技術研究所 車載用電源装置
CN105510718A (zh) * 2016-01-20 2016-04-20 大唐（赤峰）新能源有限公司 一种风力发电机组蓄电池内阻监测系统及控制方法
JP6266670B2 (ja) * 2016-02-12 2018-01-24 本田技研工業株式会社 電力供給システム及び輸送機器、並びに、電力伝送方法
US20170373512A1 (en) * 2016-06-21 2017-12-28 Chunyi Wang First Series Then Parallel Battery Pack System
CN106054083B (zh) * 2016-06-27 2019-04-05 北京新能源汽车股份有限公司 一种动力电池系统的安全监控方法及装置
CN106549439A (zh) * 2016-10-31 2017-03-29 北京小米移动软件有限公司 一种电池温度测控装置、方法及移动终端
US10391864B2 (en) * 2017-02-08 2019-08-27 Toyota Motor Engineering & Manufacturing North America, Inc. System to balance high voltage battery for vehicle
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