JP5932596B2 - 車両の回生制御装置 - Google Patents
車両の回生制御装置 Download PDFInfo
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- JP5932596B2 JP5932596B2 JP2012225575A JP2012225575A JP5932596B2 JP 5932596 B2 JP5932596 B2 JP 5932596B2 JP 2012225575 A JP2012225575 A JP 2012225575A JP 2012225575 A JP2012225575 A JP 2012225575A JP 5932596 B2 JP5932596 B2 JP 5932596B2
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- 238000011069 regeneration method Methods 0.000 title claims description 591
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- 238000001514 detection method Methods 0.000 claims description 51
- 230000006866 deterioration Effects 0.000 claims description 26
- 230000004044 response Effects 0.000 claims description 6
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- 238000012544 monitoring process Methods 0.000 description 7
- 230000015556 catabolic process Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 6
- 238000006731 degradation reaction Methods 0.000 description 6
- 230000007423 decrease Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000000994 depressogenic effect Effects 0.000 description 2
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- 229910001416 lithium ion Inorganic materials 0.000 description 2
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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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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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- H02P3/08—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Description
上記車両の制動要求時に開始され、かつ一定値もしくは直前の上記バッテリシステムの状態に応じた回生制限量でもって回生制限を行う第1の回生制限区間と、
上記第1の回生制限区間に続いて行われ、かつ上記第1の回生制限区間の回生中に上記バッテリ監視装置から取得した各セル電池の状態に基づいて回生制限量が定められる第2の回生制限区間と、
を有することを特徴としている。
但し、
Vb_ci[k]:時刻kにおけるi番目セル電池の端子間電圧(CCV:Closed Circuit Voltage)
Eb_ci[k]:時刻kにおけるi番目セル電池の開回路電圧(OCV:Open Circuit Voltage)
Rb_ci[k]:時刻kにおけるi番目セル電池の内部抵抗
Ib1[k] :時刻kにおけるバッテリ電流
時刻t0から時刻t2間の回生電流が一定であれば、セル電池560の端子間電圧もほぼ一定となり、各セル電池560の端子間電圧を高精度に検出するには、一定であることは優位となる。具体的には、セル電池560の電圧検出値が変動している場合でも、その平均値を検出することで、精度の高い端子間電圧が検出できる。
但し、
Vb_ci[j]:時刻jにおけるi番目セル電池の端子間電圧(CCV:Closed Circuit Voltage)
Eb_ci[j]:時刻jにおけるi番目セル電池の開回路電圧(OCV:Open Circuit Voltage)
Rb_ci[j]:時刻jにおけるi番目セル電池の内部抵抗
Ib2[j] :時刻jにおけるバッテリ電流
時刻t0から時刻t1の区間(第1回生制限区間)は、例えば、数百msecから1秒程度など短時間であるので、時刻t0から時刻t2の区間と時刻t2から時刻t1の区間における、充電量(SOC:State of Charge)、温度、劣化状態(SOH:State of Health)などは、同じであると考えてよい。従って、下記の式[3]、[4]の関係となる。
Rb_ci[k] = Rb_ci[j] ・・・式[4]
従って、式[1]、[2]、[3]、[4]から、次の式[5]の関係が得られる。
但し、Rb_ci = Rb_ci[k] = Rb_ci[j]
式[5]から、各セル電池560の内部抵抗(Rb_ci)および開回路電圧(OCV:Open Circuit Voltage)(Eb_ci)を演算すると、下記の式[6]および式[7]の通りとなる。
Eb_ci = Vb_ci[k] - (Vb_ci[k] - Vb_ci[j])÷(Ib1[k] -Ib2[j])×Ib2
・・・式[7]
但し、Eb_ci = Eb_ci[k] = Eb_ci[j]
以上のことから、時刻t0から時刻t2の区間と時刻t2から時刻t1の区間の2つの異なる回生電流の下で、各セル電池560の端子間電圧とバッテリ電流値を検出することで、各セル電池560の現状の内部抵抗や開回路電圧(OCV:Open Circuit Voltage)を高精度に推定することができる。
= (Vb_cmax -Vb_ci[j])×(Ib1[k] -Ib2[j])
÷(Vb_ci[k] -Vb_ci[j])+ Ib2 ・・・[8]
式[8]によって、バッテリシステム500を構成する各セル電池560の回生最大電流値(Ibmax_i)がそれぞれ演算されると、この中で最小の回生最大電流値が、バッテリシステム500の回生最大電流値となる。そして、その制約となったセル電池560が最悪セル電池として特定される。
2)バッテリ充電量(SOC)が所定値以上。つまり、「SOC > BAT_SCO_limit」(BAT_SCO_limitは設定値)
3)バッテリ内部抵抗が所定値以上。つまり、「バッテリ内部抵抗 > BAT_R_limit」(BAT_R_limitは設定値)
4)バッテリ総電圧が所定値以上。つまり、「バッテリ総電圧 > Vall_max」(Vall_maxは設定値)
5)バッテリ劣化状態が所定以上。つまり「SOH > BAT_SOH_Limit」(BAT_SOH_Limitは設定値)
上記5つの条件のいずれか一つでも成立する場合は、回生制限は必要と判定し、いずれの条件も成立しない場合は、回生制限は不要と判定する。
200 モータ
300 モータ制御装置
310 モータ制御指令演算部
320 モータ駆動制御部
330 モータ回生制御部
500 バッテリシステム
510 バッテリ監視装置
540 温度センサ
521、522 セル監視装置
531、532 モジュール
560 セル電池
600 車両コントローラ
700 ブレーキ作動装置
710 ブレーキコントローラ
800 アクセルペダルセンサ
810 ブレーキペダルセンサ
820 車速センサ
900 制御ネットワーク
Claims (12)
- 回生により車両制動力の発生が可能なモータと、充放電可能な複数のセル電池を含むバッテリシステムと、上記バッテリシステムの状態ならびに各セル電池の状態を検知するバッテリ監視装置と、車両の制動要求に伴う上記モータの回生量を所定の回生制限量を越えないように制限する回生制限手段と、を備えた車両の回生制御装置であって、
上記車両の制動要求時に開始され、かつ一定値もしくは直前の上記バッテリシステムの状態に応じた回生制限量でもって回生制限を行う第1の回生制限区間と、
上記第1の回生制限区間に続いて行われ、かつ上記第1の回生制限区間の回生中に上記バッテリ監視装置から取得した各セル電池の状態に基づいて回生制限量が定められる第2の回生制限区間と、
を有し、
上記第1の回生制限区間の回生中に、回生量を少なくとも2つの異なる状態に変化させ、各々の状態の下での各セル電池の状態から、回生時に最大電圧となるセル電池を特定し、このセル電池が回生禁止電圧に到達しないように上記第2の回生制限区間における回生制限量が定められることを特徴とする車両の回生制御装置。 - 上記バッテリシステムにおける全てのセル電池の状態の取得が完了したときに上記第1の回生制限区間から上記第2の回生制限区間に移行することを特徴とする請求項1に記載の車両の回生制御装置。
- 上記第1の回生制限区間に取得される各セル電池の状態は、各セル電池についての、端子間電圧、電流値、充電量(SOC)、劣化状態(SOH)、内部抵抗値、の少なくとも一つを含むことを特徴とする請求項1または2に記載の車両の回生制御装置。
- 上記第1の回生制限区間における回生制限量は、上記バッテリシステムの総電圧が所定の総電圧制限値を下回るように設定されることを特徴とする請求項1〜3のいずれかに記載の車両の回生制御装置。
- 上記総電圧制限値は、制動要求時の上記バッテリシステムについての、温度、充電量(SOC)、劣化状態(SOH)、内部抵抗値、の少なくとも一つに応じて設定されることを特徴とする請求項4に記載の車両の回生制御装置。
- 車両の制動要求に対し、制動要求時の上記バッテリシステムについての、温度、充電量(SOC)、劣化状態(SOH)、内部抵抗値、の少なくとも一つに基づき、回生制限を行うか否かが決定されることを特徴とする請求項1〜5のいずれかに記載の車両の回生制御装置。
- 回生により車両制動力の発生が可能なモータと、充放電可能な複数のセル電池を含むバッテリシステムと、上記バッテリシステムの状態ならびに各セル電池の状態を検知するバッテリ監視装置と、車両の制動要求に伴う上記モータの回生量を所定の回生制限量を越えないように制限する回生制限手段と、を備えた車両の回生制御装置であって、
上記車両の制動要求時に開始され、かつ一定値もしくは直前の上記バッテリシステムの状態に応じた回生制限量でもって回生制限を行う第1の回生制限区間と、
上記第1の回生制限区間に続いて行われ、かつ上記第1の回生制限区間の回生中に上記バッテリ監視装置から取得した各セル電池の状態に基づいて回生制限量が定められる第2の回生制限区間と、
を有するとともに、
上記第2の回生制限区間を伴う過去の回生制御における制動要求時の上記バッテリシステムの状態およびこれに対応した第2の回生制限区間における回生制限量を記憶する記憶手段をさらに有し、
制動要求時の上記バッテリシステムの状態が上記記憶手段における過去の状態に類似しているときに、上記第1の回生制限区間を省略して、上記記憶手段における回生制限量を用いて回生制限を行うことを特徴とする車両の回生制御装置。 - 上記第1の回生制限区間における回生制限量は、上記第2の回生制限区間における回生制限量よりも相対的に小さな回生量に設定されていることを特徴とする請求項1〜7のいずれかに記載の車両の回生制御装置。
- 回生により車両制動力の発生が可能なモータと、充放電可能な複数のセル電池を含むバッテリシステムと、上記バッテリシステムの状態ならびに各セル電池の状態を検知するバッテリ監視装置と、車両の制動要求に伴う上記モータの回生量を所定の回生制限量を越えないように制限する回生制限手段と、を備えた車両の回生制御装置であって、
上記車両の制動要求時に開始され、かつ一定値もしくは直前の上記バッテリシステムの状態に応じた回生制限量でもって回生制限を行う第1の回生制限区間と、
上記第1の回生制限区間に続いて行われ、かつ上記第1の回生制限区間の回生中に上記バッテリ監視装置から取得した各セル電池の状態に基づいて回生制限量が定められる第2の回生制限区間と、
を有し、
上記バッテリ監視装置は、全てのセル電池の状態に関する情報を出力する第1検出手段と、複数のセル電池の中で端子間電圧が最も高いセル電池の状態に関する情報のみを出力する第2検出手段と、を備え、上記第1の回生制限区間の間は、上記第2検出手段に切り換えられることを特徴とする車両の回生制御装置。 - 上記第1検出手段が全てのセル電池の状態に関する情報を出力する周期に比較して、上記第2検出手段が最も端子間電圧の高いセル電池の状態に関する情報を出力する周期の方が短いことを特徴とする請求項9に記載の車両の回生制御装置。
- 回生により車両制動力の発生が可能なモータと、充放電可能な複数のセル電池を含むバッテリシステムと、上記バッテリシステムの状態ならびに各セル電池の状態を検知するバッテリ監視装置と、を備えた車両の回生制御装置であって、
上記車両の制動要求に対し、所定の回生制限量でもって上記モータの回生量を制限する回生制限手段と、
上記回生制限手段による回生中に上記バッテリ監視装置から取得した各セル電池の状態に基づいて、回生時に回生禁止電圧に到達し易い1個もしくは複数のセル電池を特定する制約セル電池特定手段と、
を有し、
上記回生制限手段による回生中に、回生量を少なくとも2つの異なる状態に変化させ、各々の状態の下での各セル電池の状態から、回生時に最大電圧となるセル電池を特定することを特徴とする車両の回生制御装置。 - 回生電流を、所定期間一定の第1の電流値に維持した後に、異なる第2の電流値に所定期間維持し、各々の電流値の下での端子間電圧から内部抵抗が最大のセル電池を特定することを特徴とする請求項11に記載の車両の回生制御装置。
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-
2012
- 2012-10-11 JP JP2012225575A patent/JP5932596B2/ja active Active
-
2013
- 2013-09-25 WO PCT/JP2013/075787 patent/WO2014057802A1/ja active Application Filing
- 2013-09-25 EP EP13844701.6A patent/EP2907686B1/en active Active
- 2013-09-25 US US14/433,472 patent/US20150258897A1/en not_active Abandoned
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US10821834B2 (en) | 2017-12-26 | 2020-11-03 | Samsung Electronics Co., Ltd. | Method and device for regenerative braking of transportation device |
US11502527B2 (en) | 2020-01-20 | 2022-11-15 | Sk Innovation Co., Ltd. | Battery cell screening device and battery cell screening method |
US11796601B2 (en) | 2020-03-12 | 2023-10-24 | Sk On Co., Ltd. | Battery management system and battery management method |
Also Published As
Publication number | Publication date |
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CN104718101A (zh) | 2015-06-17 |
US20150258897A1 (en) | 2015-09-17 |
EP2907686A1 (en) | 2015-08-19 |
JP2014079095A (ja) | 2014-05-01 |
EP2907686A4 (en) | 2016-08-10 |
EP2907686B1 (en) | 2021-11-10 |
WO2014057802A1 (ja) | 2014-04-17 |
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