JP2012085452A - リチウムイオン電池の制御装置 - Google Patents
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Abstract
【解決手段】負荷との間で電力を授受可能に構成されたリチウムイオン電池の制御装置であって、リチウムイオン電池の容量劣化に応じて、上限電圧を高くする。
【選択図】図2
Description
負荷(例えば、後述の実施形態のモータ・ジェネレータ2)との間で電力を授受可能に構成されたリチウムイオン電池(例えば、後述の実施形態のバッテリ23)の制御装置(例えば、後述の実施形態のモータECU26、バッテリECU30)であって、前記リチウムイオン電池の容量劣化に応じて、上限電圧を高くすることを特徴とする。
正極と負極を有するリチウムイオン電池(例えば、後述の実施形態のバッテリ23)の制御装置(例えば、後述の実施形態のモータECU26、バッテリECU30)であって、負極で生じる容量劣化に応じて正極の電位を上昇させることで上限電圧を高くすることを特徴とする。
電解液の移動度の低くなる温度以下で劣化状態を推定し、上限電圧を高くすることを特徴とする。
摂氏0℃以下で、上限電圧を高くすることを特徴とする。
リチウム電析電圧が上限開回路電圧以下のとき、上限電圧を高くすることを特徴とする。
前記リチウムイオン電池の容量劣化は、前記リチウムイオン電池の内部抵抗を検出することで判断することを特徴とする。
前記負荷は、電動機(例えば、後述の実施形態のモータ・ジェネレータ2)であり、
前記制御装置は、容量劣化に応じて上限電圧を算出するとともに、前記リチウムイオン電池の電圧(例えば、後述の実施形態の上限開回路電圧)と前記上限電圧を比較し、比較結果によって充電出力制限指令を与えることを特徴とする。
前記リチウムイオン電池が車両用のバッテリであることを特徴とする。
前記電動機との間で電力を授受可能に構成されたリチウムイオン電池と、
前記リチウムイオン電池の劣化度合いを検出する又は推定する劣化検出装置と、を備えた電気自動車であって、
前記リチウムイオン電池の劣化度合いによって、回生時に前記リチウムイオン電池の上限電圧を高くすることを特徴とする。
ここで、リチウムイオン電池のモデルについて正極をコバルト酸リチウムとしたリチウムイオン電池を例にすると、基本的充放電反応は,以下の通りである。
正極反応:
Li1 − xCoO2+xLi++xe−⇔ LiCoO2 (1)
負極反応:
LixC ⇔ C+xLi+xe− (2)
電池全体反応:
Li1 − xCoO2+LixC ⇔ LiCoO2+C (3)
先ず、バッテリECU30は、劣化量Dが所定値を超えたか否かにより劣化の有無を検出する。そして、劣化量Dが所定値以下であれば劣化無しと判定して再度劣化有無を検出する。また、劣化量Dが所定値を超えて劣化有りと判定した場合、バッテリ23の上限電圧を上げるようにモータECU26に出力指令を与える。
図6に示すように、リチウムイオン電池では、電解液の移動度が低くなる0℃より低い温度域において急激にLi電析電圧が低下している。そのため、電池温度が0℃以下であれば、上限電圧を上げるように制御し、上限電圧を上げることでSOCの使用可能域を増やすことができる。なお、0℃は一例であり、電解液の種類等に応じて上限電圧を上げる温度は適宜選択することができる。
23 バッテリ(リチウムイオン電池)
24 PDU
26 モータECU(制御装置)
27 電圧センサ
28 電流センサ
29 温度センサ
30 バッテリECU(制御装置)
33 劣化検出器
Claims (9)
- 負荷との間で電力を授受可能に構成されたリチウムイオン電池の制御装置であって、前記リチウムイオン電池の容量劣化に応じて、上限電圧を高くすることを特徴とするリチウムイオン電池の制御装置。
- 正極と負極を有するリチウムイオン電池の制御装置であって、負極で生じる容量劣化に応じて正極の電位を上昇させることで上限電圧を高くすることを特徴とするリチウムイオン電池の制御装置。
- 電解液の移動度の低くなる温度以下で劣化状態を推定し、上限電圧を高くすることを特徴とする請求項1又は2に記載のリチウムイオン電池の制御装置。
- 摂氏0℃以下で、上限電圧を高くすることを特徴とする請求項3に記載のリチウムイオン電池の制御装置。
- リチウム電析電圧が上限開回路電圧以下のとき、上限電圧を高くすることを特徴とする請求項3に記載のリチウムイオン電池の制御装置。
- 前記リチウムイオン電池の容量劣化は、前記リチウムイオン電池の内部抵抗を検出することで判断することを特徴とする請求項1又は2に記載のリチウムイオン電池の制御装置。
- 前記負荷は、電動機であり、
前記制御装置は、容量劣化に応じて上限電圧を算出するとともに、前記リチウムイオン電池の電圧と前記上限電圧を比較し、比較結果によって充電出力制限指令を与えることを特徴とする請求項1又は2に記載のリチウムイオン電池の制御装置。 - 前記リチウムイオン電池が車両用のバッテリであることを特徴とする請求項7に記載のリチウムイオン電池の制御装置。
- 電動機と、
前記電動機との間で電力を授受可能に構成されたリチウムイオン電池と、
前記リチウムイオン電池の劣化度合いを検出する又は推定する劣化検出装置と、を備えた電気自動車であって、
前記リチウムイオン電池の劣化度合いによって、回生時に前記リチウムイオン電池の上限電圧を高くすることを特徴とする電気自動車。
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JP2010229978A JP5504126B2 (ja) | 2010-10-12 | 2010-10-12 | リチウムイオン電池の制御装置 |
CN201110248531.9A CN102447140B (zh) | 2010-10-12 | 2011-08-26 | 锂离子电池的控制装置 |
US13/249,860 US8305085B2 (en) | 2010-10-12 | 2011-09-30 | Lithium-ion battery controlling apparatus and electric vehicle |
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WO2014091622A1 (ja) * | 2012-12-14 | 2014-06-19 | 株式会社日立製作所 | 蓄電装置及びその充電方法 |
JP2015065119A (ja) * | 2013-09-26 | 2015-04-09 | 日立オートモティブシステムズ株式会社 | 蓄電装置 |
WO2018180333A1 (ja) * | 2017-03-29 | 2018-10-04 | 株式会社オートネットワーク技術研究所 | 車載用電源システムの制御装置及び車載用電源装置 |
US10594002B2 (en) | 2015-03-31 | 2020-03-17 | Gs Yuasa International Ltd. | Charge voltage controller for energy storage device, energy storage apparatus, battery charger for energy storage device, and charging method for energy storage device |
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DE102012214877A1 (de) * | 2012-08-22 | 2014-02-27 | Robert Bosch Gmbh | Nutzungsverfahren für elektrische Energiespeicher, Anordnung zur Ausführung eines solchen Nutzungsverfahrens, Batterie und Kraftfahrzeug mit einer solchen Batterie |
CN104348193A (zh) * | 2013-07-25 | 2015-02-11 | 观致汽车有限公司 | 电池管理***和方法、以及包括该***的车辆 |
JP6701662B2 (ja) * | 2015-10-07 | 2020-05-27 | 三菱自動車工業株式会社 | 電動車の回生制動制御装置 |
JP6605008B2 (ja) * | 2017-10-20 | 2019-11-13 | 本田技研工業株式会社 | 電源システム及び車両 |
CN110758127B (zh) * | 2018-07-26 | 2022-03-15 | 比亚迪股份有限公司 | 电池充电的方法、装置、存储介质及电子设备 |
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JP5504126B2 (ja) | 2014-05-28 |
US8305085B2 (en) | 2012-11-06 |
US20120086368A1 (en) | 2012-04-12 |
CN102447140B (zh) | 2015-03-11 |
CN102447140A (zh) | 2012-05-09 |
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