JP5954144B2 - 制御装置、制御方法、制御システムおよび電動車両 - Google Patents
制御装置、制御方法、制御システムおよび電動車両 Download PDFInfo
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- JP5954144B2 JP5954144B2 JP2012263428A JP2012263428A JP5954144B2 JP 5954144 B2 JP5954144 B2 JP 5954144B2 JP 2012263428 A JP2012263428 A JP 2012263428A JP 2012263428 A JP2012263428 A JP 2012263428A JP 5954144 B2 JP5954144 B2 JP 5954144B2
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- power storage
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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
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
- B60L1/02—Supplying electric power to auxiliary equipment of vehicles to electric heating circuits
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- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
- B60L15/2009—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for braking
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- 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
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Description
リチウムを吸蔵および放出可能な活物質を正極および負極に備える非水系電池を、1または複数、有する蓄電部の温度が、所定の温度より高いか否かを判定する判定部と、
放電の初期における蓄電部の電圧が、負極の表面上に金属リチウムが析出することに起因して生じる電圧である場合に蓄電部の劣化が有ると判定する劣化判定部と、
蓄電部の温度が所定の温度より高いと判定される場合に、所定の放電レートにより蓄電部を放電し、蓄電部の温度が所定の温度より低いと判定される場合に、蓄電部を加温することにより蓄電部の温度を所定の温度より高くした後に、放電レートにより蓄電部を放電する制御部と
を備え、
判定部は、劣化判定部により蓄電部の劣化が有ると判定される場合に、蓄電部の温度が所定の温度より高いか否かを判定する
制御装置である。
本開示は、本開示の制御装置を備える電動車両でもよい。
リチウムを吸蔵および放出可能な活物質を正極および負極に備える非水系電池を、1または複数、有する蓄電部の温度が、所定の温度より高いか否かを判定部が判定し、
放電の初期における蓄電部の電圧が、負極の表面上に金属リチウムが析出することに起因して生じる電圧である場合に蓄電部の劣化が有ると劣化判定部が判定し、
蓄電部の温度が所定の温度より高いと判定される場合に、所定の放電レートにより蓄電部を放電し、蓄電部の温度が所定の温度より低いと判定される場合に、蓄電部を加温することにより蓄電部の温度を所定の温度より高くした後に、放電レートにより蓄電部を放電する制御を制御部が実行し、
蓄電部の劣化が有ると判定される場合に、蓄電部の温度が所定の温度より高いか否かを判定部が判定する
制御装置における制御方法である。
リチウムを吸蔵および放出可能な活物質を正極および負極に備える非水系電池を、1または複数、有する蓄電部と、
蓄電部の温度が所定の温度より高いか否かを判定する判定部と、
放電の初期における蓄電部の電圧が、負極の表面上に金属リチウムが析出することに起因して生じる電圧である場合に蓄電部の劣化が有ると判定する劣化判定部と、
蓄電部の温度が所定の温度より高いと判定される場合に、所定の放電レートにより蓄電部を放電し、蓄電部の温度が所定の温度より低いと判定される場合に、蓄電部を加温することにより蓄電部の温度を所定の温度より高くした後に、放電レートにより蓄電部を放電する制御部と
を備え、
判定部は、劣化判定部により蓄電部の劣化が有ると判定される場合に、蓄電部の温度が所定の温度より高いか否かを判定する
制御システムである。
<1.一実施形態>
<2.変形例>
<3.応用例>
以下に説明する実施形態等は本開示の好適な具体例であり、本開示の内容がこれらの実施形態等に限定されるものではない。
「2次電池の一例について」
本開示において、使用される2次電池の一例は、正極活物質と、黒鉛等の炭素材料を負極活物質として含むリチウムイオン2次電池である。正極材料として特に限定はないが、好ましくは、オリビン構造を有する正極活物質を含有するものである。
ンタフルオロエタンスルホニル)イミドリチウム(Li(C2F5SO2)2N)、過塩素酸リチウム(LiClO4)、六フッ化ヒ酸リチウム(LiAsF6)、四フッ化ホウ酸リチウム(LiBF4)、トリフルオロメタンスルホン酸リチウム(LiSO3CF3)、ビス(トリフルオロメタンスルホニル)イミドリチウム(Li(CF3SO2)2N)、トリス(トリフルオロメタンスルホニル)メチルリチウム(LiC(SO2CF3)3である。
リチウムイオン2次電池に対する低温下(例えば、0℃以下)における充電は、一般に禁止されている。これは、例えば、以下の理由に基づく。低温下によりリチウムイオン2次電池に対する充電が行われると、正極から出たリチウムイオンが負極に吸収されにくくなり、負極の表面上に金属リチウムが析出し電極抵抗が増大する。析出した金属リチウムの層がさらに堆積することにより、さらにリチウムイオンの吸収が妨げられる。電極での反応が妨げられることにより充放電の効率が低下し、リチウムイオン2次電池の性能(容量やサイクル寿命など)が劣化する。一度、性能が劣化したリチウムイオン2次電池は、修理や交換等をしなければならない。このため、低温下(例えば、0℃以下)における充電は禁止されている。
図1は、制御システムの構成の一例を示す。制御システム1は、例えば、蓄電モジュール2と、コントローラ3とを含む構成を有する。蓄電モジュール2とコントローラ3との間で電力の伝送および通信がなされる。図1では1の蓄電モジュールのみが図示されているが、複数の蓄電モジュールが接続され、各蓄電モジュールがコントローラに接続されてもよい。このような構成の場合には、例えば、最下位の蓄電モジュールの正極端子および負極端子がコントローラ3に接続される。電力や制御コマンドは、上位の蓄電モジュールから下位の蓄電モジュールを介して、もしくは反対に、下位の蓄電モジュールから上位の蓄電モジュールを介して伝送される。
蓄電モジュール2の構成の一例について説明する。蓄電モジュール2を構成する各部は、例えば、所定の形状の外装ケースに収納される。外装ケースは、高い伝導率および輻射率を有する材料を用いることが望ましい。高い伝導率および輻射率を有する材料を用いることにより、外装ケースにおける優れた放熱性を得ることができる。優れた放熱性を得ることで、外装ケース内の温度上昇を抑制できる。さらに、外装ケースの開口部を最小限または、廃止することができ、高い防塵防滴性を実現できる。外装ケースは、例えば、アルミニウムまたはアルミニウム合金、銅、銅合金等の材料が使用される。
次に、コントローラ3の構成の一例について説明する。コントローラ3は、1または複数の蓄電モジュール2に対して、例えば、充電や放電の管理を行うものである。具体的には、蓄電モジュール2の充電の開始および停止,蓄電モジュール2の放電の開始および停止、充電レートおよび放電レートの設定などを行う。コントローラ3は、例えば、蓄電モジュール2と同様に外装ケースを有する構成とされる。
以上、制御システム1の構成について説明した。次に、制御システム1において実行される主要な処理について説明する。
各モードの処理の詳細について説明する。図3は、第1の充電モードによる処理の流れを示すフローチャートである。ステップS20において、第1の充電モードによる処理が開始される。そして、処理がステップS21に進む。ステップS21では通常の充電レート(例えば、1C)により蓄電モジュール2が充電される。そして、処理がステップS22に進む。
図4は、放電モードによる処理の流れを示すフローチャートである。ステップS25において、放電モードによる処理が開始される。そして、処理がステップS26に進む。ステップS26では、負荷に応じた負荷電流により蓄電モジュール2が放電される。そして、処理がステップS27に進む。
図5は、第2の充電モードによる処理の流れを示すフローチャートである。ステップS30では、第2の充電モードによる処理が開始される。そして、処理がステップS31に進む。ステップS31では、16のサブモジュールSMOの温度のうち、最も低い温度である温度TSMOが温度T2より大きく温度T3より小さい範囲(所定の低温の範囲)であるか否かが判断される。温度T2は、例えば、−10℃に設定され、温度T3は、例えば、0℃に設定される。メインマイクロコントロールユニット30は、温度TSMOが所定の低温の範囲であるか否かを判断する。温度TSMOが所定の低温の範囲である場合には、処理がステップS32に進む。
次に、劣化検出モードによる処理について説明する。劣化検出モードによる処理の説明に先立ち、低温下による充電によりリチウムイオン2次電池のセルが劣化した場合の、リチウムイオン2次電池の電圧の変化について説明する。なお、この例では、リチウムイオン2次電池が並列に接続されることによりサブモジュールSMOが構成されることから、リチウムイオン2次電池の出力電圧とサブモジュールSMOの出力電圧とは略同じ値となる。
0℃<TSMO<45℃ ・・・(1)
−10℃<TSMO≦0℃ ・・・(2)
図10は、回復モードによる処理の流れの一例を示すフローチャートである。ステップS60において回復モードによる処理が開始される。そして、処理がステップS61に進む。
回復モードによる処理の効果の一例について説明する。図11において、曲線C10は、正常なセルの放電曲線を示す。曲線C11は、劣化が生じたセルの放電曲線を示す。曲線C12は、回復モードによる処理を施したセルの放電曲線を示す。
以上、本開示の実施形態について具体的に説明したが、上述の各実施形態に限定されるものではなく、本開示の技術的思想に基づく各種の変形が可能である。
(1)
蓄電部の温度が所定の温度より高いか否かを判定する判定部と、
前記蓄電部の温度が前記所定の温度より高いと判定される場合に、所定の放電レートにより前記蓄電部を放電し、
前記蓄電部の温度が前記所定の温度より低いと判定される場合に、前記蓄電部を加温することにより前記蓄電部の温度を前記所定の温度より高くした後に、前記放電レートにより前記蓄電部を放電する制御部と
を備える制御装置。
(2)
前記蓄電部の加温は、前記蓄電部に近接して設けられた抵抗電線、前記蓄電部の充放電に伴う自己発熱および外気温の温度上昇のいずれかにより行われる
(1)に記載の制御装置。
(3)
前記所定の放電レートは、0.2Cより小さい値に設定される
(1)または(2)に記載の制御装置。
(4)
前記所定の放電レートは、0.1Cから0.2Cまでの間の値に設定される
(3)に記載の制御装置。
(5)
前記所定の温度は、15℃に設定される
(1)乃至(4)のいずれかに記載の制御装置。
(6)
前記制御部は、0.1Cから0.2Cまでの間の所定の充電レートにより、前記蓄電部の電圧が所定の電圧になるまで前記蓄電部を充電し、
前記判定部は、前記充電が終了した後に前記判定を行う
(1)乃至(5)のいずれかに記載の制御装置。
(7)
前記判定部は、前記充電が行われる前に、前記蓄電部の温度が所定の温度より高いか否かを判定し、
前記制御部は、
前記蓄電部の温度が前記所定の温度より高いと判定される場合に、前記蓄電部を前記充電レートにより充電し、
前記蓄電部の温度が前記所定の温度より低いと判定される場合に、前記蓄電部を加温することにより前記蓄電部の温度を前記所定の温度より高くした後に、前記蓄電部を前記充電レートにより充電する
(6)に記載の制御装置。
(8)
前記蓄電部の劣化の有無を判定する劣化判定部を備え、
前記判定部は、前記劣化判定部により前記蓄電部の劣化が有ると判定される場合に、前記蓄電部の温度が前記所定の温度より高いか否かを判定する
(1)乃至(7)のいずれかに記載の制御装置。
(9)
前記蓄電部は、リチウムを吸蔵および放出可能な活物質を正極および負極に備える非水系電池を、1または複数、有する
(8)に記載の制御装置。
(10)
前記劣化判定部は、前記放電の初期における前記蓄電部の電圧が、前記負極の表面上に金属リチウムが析出することに起因して生じる電圧である場合に前記蓄電部の劣化が有ると判定する
(9)に記載の制御装置。
(11)
前記制御部は、
前記放電の後に、前記蓄電部の温度に応じて、前記蓄電部に対する第1の充電レートによる充電、前記蓄電部に対する前記第1の充電レートより小さい第2の充電レートによる充電および前記蓄電部に対する加温のいずれかを行う
(1)乃至(10)のいずれかに記載の制御装置。
(12)
前記制御部は、
前記蓄電部の温度が第1の温度より高く第2の温度より低い場合には、前記第2の充電レートによる充電を行い、
前記蓄電部の温度が前記第2の温度より高い場合には、前記第1の充電レートによる充電を行い、
前記蓄電部の温度が前記第1の温度より低い場合には、前記蓄電部に対する加温を行う
(11)に記載の制御装置。
(13)
前記第1の充電レートによる充電の場合には、前記蓄電部の電圧が満充電電圧になるまで該蓄電部が充電され、
前記第2の充電レートによる充電の場合には、前記蓄電部の電圧が前記満充電電圧より小さい電圧になるまで該蓄電部が充電される
(12)に記載の制御装置。
(14)
前記第1の温度は−10℃であり、前記第2の温度は0℃である
(12)または(13)に記載の制御装置。
(15)
蓄電部の温度が所定の温度より高いか否かを判定し、
前記蓄電部の温度が前記所定の温度より高いと判定される場合に、所定の放電レートにより前記蓄電部を放電し、
前記蓄電部の温度が前記所定の温度より低いと判定される場合に、前記蓄電部を加温し、前記蓄電部の温度を前記所定の温度より高くした後に、前記放電レートにより前記蓄電部を放電する
制御装置における制御方法。
(16)
蓄電部と、
前記蓄電部の温度が所定の温度より高いか否かを判定する判定部と、
前記蓄電部の温度が前記所定の温度より高いと判定される場合に、所定の放電レートにより前記蓄電部を放電し、
前記蓄電部の温度が前記所定の温度より低いと判定される場合に、前記蓄電部を加温し、前記蓄電部の温度を前記所定の温度より高くした後に、前記放電レートにより前記蓄電部を放電する制御部と
を備える制御システム。
(17)
(1)に記載の制御装置を備える電動車両。
「応用例としての住宅における電力貯蔵装置」
本開示を住宅用の電力貯蔵装置に適用した例について、図14を参照して説明する。例えば住宅101用の電力貯蔵装置100においては、火力発電102a、原子力発電102b、水力発電102c等の集中型電力系統102から電力網109、情報網112、スマートメータ107、パワーハブ108等を介し、電力が蓄電装置103に供給される。これと共に、家庭内発電装置104等の独立電源から電力が蓄電装置103に供給される。蓄電装置103に供給された電力が蓄電される。蓄電装置103を使用して、住宅101で使用する電力が給電される。住宅101に限らずビルに関しても同様の電力貯蔵装置を使用できる。
本開示を車両用の電力貯蔵装置に適用した例について、図15を参照して説明する。図15に、本開示が適用されるシリーズハイブリッドシステムを採用するハイブリッド車両の構成の一例を概略的に示す。シリーズハイブリッドシステムはエンジンで動かす発電機で発電された電力、あるいはそれを電池に一旦貯めておいた電力を用いて、電力駆動力変換装置で走行する車である。
2・・・蓄電モジュール
3・・・コントローラ
4・・・充電装置
4a・・・充電電圧および充電電流制御部
5・・・負荷
5a・・・放電電流制御部
15・・・温度測定部
19・・・電流検出抵抗
20・・・電流検出アンプ
22・・・加温部
25・・・サブマイクロコントロールユニット
30・・・メインマイクロコントロールユニット
SMO・・・サブモジュール
Claims (14)
- リチウムを吸蔵および放出可能な活物質を正極および負極に備える非水系電池を、1または複数、有する蓄電部の温度が、所定の温度より高いか否かを判定する判定部と、
放電の初期における前記蓄電部の電圧が、前記負極の表面上に金属リチウムが析出することに起因して生じる電圧である場合に前記蓄電部の劣化が有ると判定する劣化判定部と、
前記蓄電部の温度が前記所定の温度より高いと判定される場合に、所定の放電レートにより前記蓄電部を放電し、前記蓄電部の温度が前記所定の温度より低いと判定される場合に、前記蓄電部を加温することにより前記蓄電部の温度を前記所定の温度より高くした後に、前記放電レートにより前記蓄電部を放電する制御部と
を備え、
前記判定部は、前記劣化判定部により前記蓄電部の劣化が有ると判定される場合に、前記蓄電部の温度が前記所定の温度より高いか否かを判定する
制御装置。 - 前記蓄電部の加温は、前記蓄電部に近接して設けられた抵抗電線、前記蓄電部の充放電に伴う自己発熱および外気温の温度上昇のいずれかにより行われる
請求項1に記載の制御装置。 - 前記所定の放電レートは、0.2Cより小さい値に設定される
請求項1または2に記載の制御装置。 - 前記所定の放電レートは、0.1Cから0.2Cまでの間の値に設定される
請求項3に記載の制御装置。 - 前記所定の温度は、15℃に設定される
請求項1乃至4のいずれかに記載の制御装置。 - 前記制御部は、0.1Cから0.2Cまでの間の所定の充電レートにより、前記蓄電部の電圧が所定の電圧になるまで前記蓄電部を充電し、
前記判定部は、前記充電が終了した後に前記判定を行う
請求項1乃至5のいずれかに記載の制御装置。 - 前記判定部は、前記充電が行われる前に、前記蓄電部の温度が所定の温度より高いか否かを判定し、
前記制御部は、
前記蓄電部の温度が前記所定の温度より高いと判定される場合に、前記蓄電部を前記充電レートにより充電し、
前記蓄電部の温度が前記所定の温度より低いと判定される場合に、前記蓄電部を加温することにより前記蓄電部の温度を前記所定の温度より高くした後に、前記蓄電部を前記充電レートにより充電する
請求項6に記載の制御装置。 - 前記制御部は、
前記放電の後に、前記蓄電部の温度に応じて、前記蓄電部に対する第1の充電レートによる充電、前記蓄電部に対する前記第1の充電レートより小さい第2の充電レートによる充電および前記蓄電部に対する加温のいずれかを行う
請求項1乃至7のいずれかに記載の制御装置。 - 前記制御部は、
前記蓄電部の温度が第1の温度より高く第2の温度より低い場合には、前記第2の充電レートによる充電を行い、
前記蓄電部の温度が前記第2の温度より高い場合には、前記第1の充電レートによる充電を行い、
前記蓄電部の温度が前記第1の温度より低い場合には、前記蓄電部に対する加温を行う
請求項8に記載の制御装置。 - 前記第1の充電レートによる充電の場合には、前記蓄電部の電圧が満充電電圧になるまで該蓄電部が充電され、
前記第2の充電レートによる充電の場合には、前記蓄電部の電圧が前記満充電電圧より小さい電圧になるまで該蓄電部が充電される
請求項9に記載の制御装置。 - 前記第1の温度は−10℃であり、前記第2の温度は0℃である
請求項9または10に記載の制御装置。 - リチウムを吸蔵および放出可能な活物質を正極および負極に備える非水系電池を、1または複数、有する蓄電部の温度が、所定の温度より高いか否かを判定部が判定し、
放電の初期における前記蓄電部の電圧が、前記負極の表面上に金属リチウムが析出することに起因して生じる電圧である場合に前記蓄電部の劣化が有ると劣化判定部が判定し、
前記蓄電部の温度が前記所定の温度より高いと判定される場合に、所定の放電レートにより前記蓄電部を放電し、前記蓄電部の温度が前記所定の温度より低いと判定される場合に、前記蓄電部を加温することにより前記蓄電部の温度を前記所定の温度より高くした後に、前記放電レートにより前記蓄電部を放電する制御を制御部が実行し、
前記蓄電部の劣化が有ると判定される場合に、前記蓄電部の温度が前記所定の温度より高いか否かを前記判定部が判定する
制御装置における制御方法。 - リチウムを吸蔵および放出可能な活物質を正極および負極に備える非水系電池を、1または複数、有する蓄電部と、
前記蓄電部の温度が所定の温度より高いか否かを判定する判定部と、
放電の初期における前記蓄電部の電圧が、前記負極の表面上に金属リチウムが析出することに起因して生じる電圧である場合に前記蓄電部の劣化が有ると判定する劣化判定部と、
前記蓄電部の温度が前記所定の温度より高いと判定される場合に、所定の放電レートにより前記蓄電部を放電し、前記蓄電部の温度が前記所定の温度より低いと判定される場合に、前記蓄電部を加温することにより前記蓄電部の温度を前記所定の温度より高くした後に、前記放電レートにより前記蓄電部を放電する制御部と
を備え、
前記判定部は、前記劣化判定部により前記蓄電部の劣化が有ると判定される場合に、前記蓄電部の温度が前記所定の温度より高いか否かを判定する
制御システム。 - 請求項1乃至11のいずれかに記載の制御装置を備える電動車両。
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CN201380061106.6A CN104813532B (zh) | 2012-11-30 | 2013-10-07 | 电池控制装置、控制方法、控制系统与电动车辆 |
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