JP6747382B2 - リチウムイオン電池の状態推定装置および状態推定方法 - Google Patents
リチウムイオン電池の状態推定装置および状態推定方法 Download PDFInfo
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- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
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- 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]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
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- 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
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- 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
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- H01M10/00—Secondary cells; Manufacture thereof
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- H01M10/44—Methods for charging or discharging
- H01M10/443—Methods for charging or discharging in response to temperature
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- H—ELECTRICITY
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- H—ELECTRICITY
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- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
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- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
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- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
- H02J7/0049—Detection of fully charged condition
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Description
Claims (5)
- リチウムイオン電池の状態推定装置であって、
前記リチウムイオン電池の電解液の凍結温度の測定値を算出可能に構成された第1算出部と、
前記リチウムイオン電池の容量の測定値を算出可能に構成された第2算出部と、
前記リチウムイオン電池の状態を推定可能に構成された推定部とを備え、
前記推定部は、前記凍結温度の測定値と前記容量の測定値とを用いて、前記リチウムイオン電池の全体の容量低下量に対して材料劣化による容量低下量が占める割合である材料劣化割合、および前記全体の容量低下量に対してリチウム析出による容量低下量が占める割合である析出劣化割合の少なくとも一方を算出する、リチウムイオン電池の状態推定装置。 - 前記状態推定装置は、前記リチウム析出が生じておらず前記材料劣化が生じている場合における前記容量と前記凍結温度との対応関係を示す情報を予め記憶する記憶部をさらに備え、
前記推定部は、
前記記憶部に記憶された前記情報を参照して前記凍結温度の測定値と初期凍結温度との差分に対応する第1容量低下量を算出し、
前記容量の測定値と初期容量との差分を第2容量低下量として算出し、
前記第1容量低下量を前記第2容量低下量で除算した値を前記材料劣化割合として算出する、請求項1に記載のリチウムイオン電池の状態推定装置。 - 前記推定部は、前記第2容量低下量から前記第1容量低下量を差し引いた第3容量低下量を前記第2容量低下量で除算した値を前記析出劣化割合として算出する、請求項2に記載のリチウムイオン電池の状態推定装置。
- 前記第1算出部は、
前記リチウムイオン電池のインピーダンス測定を前記リチウムイオン電池の温度を上昇および低下させながら順次行ない、
前記インピーダンス測定の結果を用いて温度変化に対する前記リチウムイオン電池の抵抗のヒステリシスが生じ始める温度を特定し、
前記抵抗のヒステリシスが生じ始める温度を前記凍結温度の測定値とする、請求項1〜3のいずれかに記載のリチウムイオン電池の状態推定装置。 - リチウムイオン電池の状態推定方法であって、
前記リチウムイオン電池の電解液の凍結温度の測定値を算出するステップと、
前記リチウムイオン電池の容量の測定値を算出するステップと、
前記凍結温度の測定値と前記容量の測定値とを用いて、前記リチウムイオン電池の全体の容量低下量に対する材料劣化による容量低下量の割合である材料劣化割合、および前記全体の容量低下量に対するリチウム析出による容量低下量の割合である析出劣化割合の少なくとも一方を算出するステップとを含む、リチウムイオン電池の状態推定方法。
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JP2017104872A JP6747382B2 (ja) | 2017-05-26 | 2017-05-26 | リチウムイオン電池の状態推定装置および状態推定方法 |
US15/958,723 US11067637B2 (en) | 2017-05-26 | 2018-04-20 | Apparatus and method of estimating state of lithium ion battery |
CN201810471349.1A CN108963354B (zh) | 2017-05-26 | 2018-05-17 | 锂离子电池的状态推定装置和状态推定方法 |
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JP2009199936A (ja) | 2008-02-22 | 2009-09-03 | Nissan Motor Co Ltd | 電源システムおよびこれを搭載した車両ならびに電源システムの制御方法 |
JP5341823B2 (ja) * | 2010-06-07 | 2013-11-13 | トヨタ自動車株式会社 | リチウムイオン二次電池の劣化判定システムおよび劣化判定方法 |
EP2693593A4 (en) * | 2011-03-28 | 2015-08-05 | Toyota Motor Co Ltd | ELECTRIC VEHICLE AND CONTROL PROCESS THEREFOR |
US9465078B2 (en) * | 2012-11-02 | 2016-10-11 | Fairfield Industries, Inc. | Battery capacity and durability prediction method |
US9742042B2 (en) * | 2013-11-23 | 2017-08-22 | Hrl Laboratories, Llc | Voltage protection and health monitoring of batteries with reference electrodes |
JP6330639B2 (ja) * | 2014-12-01 | 2018-05-30 | トヨタ自動車株式会社 | 蓄電システムおよびその制御方法 |
JP6115557B2 (ja) * | 2014-12-23 | 2017-04-19 | トヨタ自動車株式会社 | 非水電解液二次電池システム |
DE112016000894T5 (de) * | 2015-03-18 | 2017-11-16 | Jeff Dahn | Analyse thermischer Merkmale elektrochemischer Vorrichtungen |
JP2017084552A (ja) * | 2015-10-27 | 2017-05-18 | トヨタ自動車株式会社 | 二次電池システム |
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US20180340984A1 (en) | 2018-11-29 |
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US11067637B2 (en) | 2021-07-20 |
CN108963354B (zh) | 2021-09-10 |
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