JP7372994B2 - バッテリ温度調整システム - Google Patents
バッテリ温度調整システム Download PDFInfo
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- JP7372994B2 JP7372994B2 JP2022016699A JP2022016699A JP7372994B2 JP 7372994 B2 JP7372994 B2 JP 7372994B2 JP 2022016699 A JP2022016699 A JP 2022016699A JP 2022016699 A JP2022016699 A JP 2022016699A JP 7372994 B2 JP7372994 B2 JP 7372994B2
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- 238000001816 cooling Methods 0.000 claims description 79
- 239000003507 refrigerant Substances 0.000 claims description 15
- 230000008859 change Effects 0.000 claims description 5
- 238000005057 refrigeration Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 230000007704 transition Effects 0.000 description 7
- 238000004378 air conditioning Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Description
外部電源からの電力により充電可能なバッテリと、
前記バッテリの温度を調整するバッテリ温調装置と、
前記バッテリ及びバッテリ温調装置を制御する制御装置と、を備えるバッテリ温度調整システムであって、
前記制御装置は、
車両の走行予定計画を取得する走行予定計画取得部と、
前記走行予定計画に基づいて、該走行予定計画における前記車両の状態に応じた前記バッテリ温調装置の温調能力で前記バッテリの温度が目標温度域に存在するよう前記バッテリの温度を調整する通常バッテリ冷却制御を行った場合のバッテリ温度予測を導出する、通常バッテリ冷却制御計画部と、
前記バッテリの温調計画を作成する温調計画作成部と、を備え、
前記温調計画作成部は、
前記バッテリ温度予測が、前記目標温度域の高温側目標温度以上の温度である所定温度を超えるオーバーシュートが発生することが予測されるとき、前記バッテリの温度を前記所定温度以下にするために必要なバッテリ温調量を導出し、
前記バッテリ温調量を、前記バッテリ温調装置の温調能力に基づいて、前記オーバーシュートの発生前に振り分ける分配制御を行い、
前記分配制御において前記バッテリ温調量を振り分ける振分先は、前記通常バッテリ冷却制御においてバッテリ冷却量が零となる無冷却モード領域である。
バッテリ温度調整システム10は、図1に示すように、バッテリBATと、温調装置16と、バッテリBAT及び温調装置16を制御する制御装置20と、を備え、電気自動車等の車両に搭載される。
バッテリBATは、例えば、リチウムイオン電池などの二次電池である。バッテリBATには、車両の外部にある外部電源50、例えば急速充電器から導入される電力により充電可能に構成される。バッテリBATは、主として不図示の駆動モータに電力を供給する。また、バッテリBATは、駆動モータの回生時に供給された電力でも充電可能に構成される。
温調装置16は、図2に示すように、空調装置(エアコンディショナー)18とバッテリ温調回路19とを備える。なお、以下、空調装置18をエアコン18と称する。エアコン18は、冷凍サイクル180を備え、車室内の空気の状態を調整することにより車室内の環境を調整する。エアコン18は、乗員(以下、ユーザとも称する)の操作を受け付けた後述の温調制御部21によって制御される。バッテリ温調回路19は、冷媒流路に冷媒を流すことで、バッテリBATなどを冷却又は加温する。バッテリ温調回路19の動作は、温調制御部21によって、バッテリ温調回路19の温調能力に基づきバッテリBATの温度が目標温度域に存在するよう制御される。以下、この制御を通常バッテリ冷却制御と称するが、バッテリ温調回路19の動作は、通常バッテリ冷却制御に加えて、後述する冷却能力分配制御によっても制御される。
つぎに、図3を参照して、ナビゲーション装置17の構成の一例について説明する。図3に示すように、ナビゲーション装置17は、プロセッサ171と、メモリ172と、GPSユニット173と、表示部174と、操作部175と、インターフェース176と、を備える。また、各構成部171~176は、バス177によってそれぞれ接続されている。
制御装置20は、図1に示すように、温調制御部21と、バッテリ情報取得部22と、走行予定計画取得部23と、目標バッテリ温度設定部24と、通常バッテリ冷却制御計画部25と、バッテリ温調計画作成部26と、を備える。制御装置20は、プロセッサ、メモリ、インターフェース等を備えるECU(Electronic Control Unit)によって実現される。なお、各機能部は、それぞれ別体の制御装置で構成されていてもよい。
先ず、走行予定計画取得部23は、ナビゲーション装置17から走行予定計画を取得する(S1)。続いて、通常バッテリ冷却制御計画部25は、走行予定計画において通常バッテリ冷却制御を行った場合のバッテリ温度予測及びチラー抜熱量を演算する(S2)。また、目標バッテリ温度設定部24は、走行予定計画からバッテリBATのSOCの推移(以下、SOC推移)及び要求BAT出力を算出し(S3)、目標BAT温度を設定する(S4)。なお、ステップS2と、ステップS3及びステップS4とは、順番が逆でもよく、同時に行ってもよい。
前記バッテリの温度を調整するバッテリ温調装置(バッテリ温調回路19)と、
前記バッテリ及びバッテリ温調装置を制御する制御装置(制御装置20)と、を備えるバッテリ温度調整システム(バッテリ温度調整システム10)であって、
前記制御装置は、
車両の走行予定計画を取得する走行予定計画取得部(走行予定計画取得部23)と、
前記バッテリの温度が目標温度域に存在するよう通常バッテリ冷却制御を計画し、該通常バッテリ冷却制御におけるバッテリ温度予測とバッテリ温調装置の温調能力を導出する、通常バッテリ冷却制御計画部(通常バッテリ冷却制御計画部25)と、
前記バッテリの温調計画を作成する温調計画作成部(バッテリ温調計画作成部26)と、を備え、
前記温調計画作成部は、
前記バッテリ温度予測が所定温度を超えるオーバーシュートが発生することが予測されるとき、前記バッテリの温度を前記所定温度以下にするために必要なバッテリ温調量を導出し、
前記バッテリ温調量を、前記バッテリ温調装置の温調能力に基づいて、前記オーバーシュートの発生前に振り分ける、バッテリ温度調整システム。
前記温調計画作成部は、
前記バッテリ温調量を、前記バッテリ温調装置の温調能力を超えないように、前記オーバーシュートの発生時からスタート時に向かって順に優先的に振り分ける、バッテリ温度調整システム。
車室内の温度を調整する空調装置(空調装置18)と、
該バッテリ温調装置の冷媒と該空調装置の冷媒同士で熱交換可能な熱交換部(チラー189)と、をさらに備える、バッテリ温度調整システム。
前記バッテリ温調量を振り分ける振分先は、前記通常バッテリ冷却制御の下で前記熱交換部が非作動の領域である、バッテリ温度調整システム。
前記バッテリ温調装置の冷却能力は、前記車両の状態及び前記空調装置の状態に基づいて決定される、バッテリ温度調整システム。
前記制御装置は、前記所定温度である目標バッテリ温度を設定する目標バッテリ温度設定部(目標バッテリ温度設定部24)をさらに備え、
前記目標バッテリ温度設定部は、前記走行予定計画から前記バッテリのSOCの推移及び要求BAT出力を算出し、算出した前記バッテリのSOCの推移及び要求BAT出力から前記車両の走行時の前記目標バッテリ温度を設定する、バッテリ温度調整システム。
前記制御装置は、前記所定温度である目標バッテリ温度を設定する目標バッテリ温度設定部をさらに備え、
前記目標バッテリ温度設定部は、前記走行予定計画から充電設備の情報を取得し、前記充電設備の情報から前記車両の充電時の前記目標バッテリ温度を設定する、バッテリ温度調整システム。
18 空調装置
19 バッテリ温調回路(バッテリ温調装置)
20 制御装置
23 走行予定計画取得部
24 目標バッテリ温度設定部
25 通常バッテリ冷却制御計画部
26 バッテリ温調計画作成部(温調計画作成部)
50 外部電源
189 チラー(熱交換部)
BAT バッテリ
Claims (7)
- 外部電源からの電力により充電可能なバッテリと、
前記バッテリの温度を調整するバッテリ温調装置と、
前記バッテリ及びバッテリ温調装置を制御する制御装置と、を備えるバッテリ温度調整システムであって、
前記制御装置は、
車両の走行予定計画を取得する走行予定計画取得部と、
前記走行予定計画に基づいて、該走行予定計画における前記車両の状態に応じた前記バッテリ温調装置の温調能力で前記バッテリの温度が目標温度域に存在するよう前記バッテリの温度を調整する通常バッテリ冷却制御を行った場合のバッテリ温度予測を導出する、通常バッテリ冷却制御計画部と、
前記バッテリの温調計画を作成する温調計画作成部と、を備え、
前記温調計画作成部は、
前記バッテリ温度予測が、前記目標温度域の高温側目標温度以上の温度である所定温度を超えるオーバーシュートが発生することが予測されるとき、前記バッテリの温度を前記所定温度以下にするために必要なバッテリ温調量を導出し、
前記バッテリ温調量を、前記バッテリ温調装置の温調能力に基づいて、前記オーバーシュートの発生前に振り分ける分配制御を行い、
前記分配制御において前記バッテリ温調量を振り分ける振分先は、前記通常バッテリ冷却制御においてバッテリ冷却量が零となる無冷却モード領域である、バッテリ温度調整システム。 - 請求項1に記載のバッテリ温度調整システムであって、
前記温調計画作成部は、
前記分配制御では、前記無冷却モード領域のうち、前記オーバーシュートの発生時から前記走行予定計画のスタート時に向かって順に優先的に振り分ける、バッテリ温度調整システム。 - 請求項1又は2に記載のバッテリ温度調整システムであって、
車室内の温度を調整する空調装置と、
該バッテリ温調装置の冷媒と該空調装置の冷媒同士で熱交換可能な熱交換部と、をさらに備える、バッテリ温度調整システム。 - 請求項3に記載のバッテリ温度調整システムであって、
前記無冷却モード領域は、前記通常バッテリ冷却制御の下で前記熱交換部が非作動の領域である、バッテリ温度調整システム。 - 請求項3又は4に記載のバッテリ温度調整システムであって、
前記バッテリ温調装置の温調能力は、前記車両の状態及び前記空調装置の状態に基づいて決定される、バッテリ温度調整システム。 - 請求項1~5のいずれか一項に記載のバッテリ温度調整システムであって、
前記制御装置は、前記所定温度である目標バッテリ温度を設定する目標バッテリ温度設定部をさらに備え、
前記目標バッテリ温度設定部は、前記走行予定計画から前記バッテリのSOCの推移及び要求BAT出力を算出し、算出した前記バッテリのSOCの推移及び要求BAT出力から前記車両の走行時の前記目標バッテリ温度を設定する、バッテリ温度調整システム。 - 請求項1~6のいずれか一項に記載のバッテリ温度調整システムであって、
前記制御装置は、前記所定温度である目標バッテリ温度を設定する目標バッテリ温度設定部をさらに備え、
前記目標バッテリ温度設定部は、前記走行予定計画から充電設備の情報を取得し、前記充電設備の情報から前記車両の充電時の前記目標バッテリ温度を設定する、バッテリ温度調整システム。
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