JP6958316B2 - 電池システム及びリチウムイオン二次電池の容量回復方法 - Google Patents
電池システム及びリチウムイオン二次電池の容量回復方法 Download PDFInfo
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- B60K6/28—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the electric energy storing means, e.g. batteries or capacitors
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Description
図2は、組電池10を構成するリチウムイオン二次電池の構造を模式的に示す断面図である。図2を参照して、リチウムイオン二次電池は、正極電極20及び負極電極30がセパレータ40を介して交互に積層されて構成され、その積層体が図示されない電解質によって覆われている。
図3は、正極電極20と負極電極30との間で充放電に伴ないリチウムイオンが移動する様子を概念的に示した図である。図3を参照して、リチウムイオン二次電池の充電時には、負極電極30に電子が供給され、正極電極20(正極活物質層22)から負極電極30(負極活物質層32)へリチウムイオンが移動する。反対に、リチウムイオン二次電池の放電時には、正極電極20に電子が供給され、負極電極30(負極活物質層32)から正極電極20(正極活物質層22)へリチウムイオンが移動する。
図6は、本実施の形態に従う電池システムにおける容量回復方法を説明するための図である。この図6では、本容量回復方法の実行中におけるセルの電圧VBiの時間的推移が示されている。
上述のように、組電池10の温度は、40℃から80℃の条件下で実行するのが好ましい。そこで、組電池10の温度が40℃よりも低い場合には、組電池10の温度を昇温する昇温制御を実行してから、上記の実施の形態で説明した容量回復制御を実行するようにしてもよい。
Claims (6)
- 正極活物質層と負極活物質層とがセパレータを介して配置されるリチウムイオン二次電池と、
前記リチウムイオン二次電池の充放電を実行するように構成された充放電装置と、
前記充放電装置を制御することによって、前記リチウムイオン二次電池の容量を回復させる容量回復制御を実行するように構成された制御装置とを備え、
前記負極活物質層は、
前記正極活物質層と対向する対向部と、
前記正極活物質層と対向しない非対向部とを含み、
前記容量回復制御は、
前記リチウムイオン二次電池を所定の過放電領域まで放電させる第1の制御と、
前記過放電領域において、放電停止による前記リチウムイオン二次電池の電圧上昇と、放電電流を振動させつつ前記リチウムイオン二次電池を放電させるパルス放電とを繰り返し実行する第2の制御とを含み、
前記第2の制御は、前記過放電領域を示す電圧以下に設定される所定電圧まで前記リチウムイオン二次電池の電圧を上昇させる、電池システム。 - 前記リチウムイオン二次電池は、集電体を含み、
前記第2の制御は、前記リチウムイオン二次電池の電圧が予め定められた下限電圧を下回らない範囲で実行され、
前記下限電圧は、前記集電体の溶出が生じることのない電圧レベルに設定される、請求項1に記載の電池システム。 - 前記パルス放電における放電電流の振動周波数は、3kHzから20kHzである、請求項1又は請求項2に記載の電池システム。
- 前記容量回復制御は、前記リチウムイオン二次電池の温度が40℃から80℃の条件下で実行される、請求項1から請求項3のいずれか1項に記載の電池システム。
- 前記過放電領域は、前記リチウムイオン二次電池のSOCが0%以下の領域である、請求項1から請求項4のいずれか1項に記載の電池システム。
- リチウムイオン二次電池の容量回復方法であって、
前記リチウムイオン二次電池は、セパレータを介して配置される正極活物質層と負極活物質層とを含み、
前記負極活物質層は、
前記正極活物質層と対向する対向部と、
前記正極活物質層と対向しない非対向部とを含み、
前記容量回復方法は、
前記リチウムイオン二次電池を所定の過放電領域まで放電させるステップと、
前記過放電領域において、放電停止による前記リチウムイオン二次電池の電圧上昇と、放電電流を振動させつつ前記リチウムイオン二次電池を放電させるパルス放電とを繰り返し実行するステップとを含み、
前記繰り返し実行するステップは、前記過放電領域を示す電圧以下に設定される所定電圧まで前記リチウムイオン二次電池の電圧を上昇させるステップを含む、リチウムイオン二次電池の容量回復方法。
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JP2017239400A JP6958316B2 (ja) | 2017-12-14 | 2017-12-14 | 電池システム及びリチウムイオン二次電池の容量回復方法 |
EP18205805.7A EP3499633B1 (en) | 2017-12-14 | 2018-11-13 | Battery system and capacity recovery method for lithium ion secondary battery |
KR1020180155842A KR102195013B1 (ko) | 2017-12-14 | 2018-12-06 | 전지 시스템 및 리튬 이온 이차 전지의 용량 회복 방법 |
US16/214,279 US10790552B2 (en) | 2017-12-14 | 2018-12-10 | Battery system and capacity recovery method for lithium ion secondary battery |
BR102018075836-5A BR102018075836A2 (pt) | 2017-12-14 | 2018-12-12 | Sistema de bateria e método de capacidade de recuperação para bateria secundária de íon de lítio |
RU2018143931A RU2696605C1 (ru) | 2017-12-14 | 2018-12-12 | Аккумуляторная система и способ восстановления емкости вторичного литий-ионного аккумулятора |
CN201811523466.4A CN109962302B (zh) | 2017-12-14 | 2018-12-13 | 电池系统及锂离子二次电池的容量恢复方法 |
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US11710863B2 (en) * | 2020-05-20 | 2023-07-25 | Nissan Motor Co., Ltd. | Recovery control method for secondary battery, recovery control system for secondary battery, and vehicle control system |
WO2022130755A1 (ja) * | 2020-12-18 | 2022-06-23 | 株式会社スリーダム | 電池制御装置、電池回復処理方法 |
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US20190190089A1 (en) | 2019-06-20 |
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