JP2021518733A - 電力管理および制御のためのシステムおよび方法 - Google Patents
電力管理および制御のためのシステムおよび方法 Download PDFInfo
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Abstract
Description
現在、高電圧バッテリパックが、典型的には、低電圧バッテリモジュールの直列チェーンで編成される。各そのようなモジュールはさらに、個々のセルの直列に接続されたセットと、単純な組み込みバッテリ管理システムとから成り、充電状態および電圧等の基本的セル関連特性を調整する。より精巧な能力またはある形態のスマート相互接続性を伴う電子機器が、欠けている。結果として、任意の監視または制御機能が、別個のシステムによって取り扱われ、これは、車内の他の場所に存在するとしても、個々のセル健全性、充電状態、温度、および他の性能に影響を及ぼすメトリクスを監視する能力が欠けている。また、任意の形態で個々のセルあたりの電力の引き出しを調節する能力も存在していない。主要な結果のうちのいくつかは、(1)最も弱いセルが、バッテリパック全体の全体的性能を抑制すること、(2)任意のセルまたはモジュールの故障が、パック全体の交換の必要性につながること、(3)バッテリ信頼性および安全性が、著しく低減されること、(4)バッテリ寿命が、限定されること、(5)熱管理が、困難であること、(6)バッテリパックが、常に、最大能力を下回って動作すること、(7)回生制動由来の電力のバッテリパックの中への急突入が、バッテリ内に容易に貯蔵されることができず、ダンプ抵抗器を介した散逸を要求するであろうことである。
充電回路が、典型的には、別個の内蔵システムで実現される。それらは、AC信号またはDC信号の形態でEVの外側から来る電力を段階分けし、それをDCに変換し、それをバッテリパックに送給する。充電システムが、電圧および電流を監視し、典型的には、着実な一定の送給量を供給する。バッテリパックおよび典型的充電回路の設計を考慮すると、セル健全性、性能特性、温度等に基づいて、個々のバッテリモジュールに充電フローを合わせる能力は、ほとんどない。充電サイクルもまた、典型的には、充電システムおよびバッテリパックに、電荷伝達または達成可能な合計充電を最適化するであろうパルス充電または他の技法を可能にするための回路が欠けているため、長い。
従来の制御は、EVの電気システムのバス電圧へのバッテリパック電圧レベルを調節するためのDC−DC変換段階を含有する。モータが、ひいては、次いで、要求されるAC信号を電気モータに提供する、単純な2レベル多相コンバータによって駆動される。各モータは、従来的に、3相設計でモータを駆動する別個のコントローラによって制御される。デュアルモータEVが、2つのコントローラを要求するであろう一方で、4つのインホイールモータを使用するEVは、4つの個々のコントローラを要求するであろう。従来のコントローラ設計には、より多数の磁極片によって特徴付けられる、スイッチリラクタンスモータ(SRM)等の次世代モータを駆動する能力も欠けている。適合が、高相設計を要求し、システムをより複雑にし、最終的には、高いトルクリップルおよび音響雑音等の電気雑音および駆動性能に対処することをできなくさせるであろう。
図4および5は、それぞれ、スーパーキャパシタ(またはウルトラキャプ)を使用する回生制動/加速能力を伴う知的バッテリモジュール132の斜視図および略図を示す。これは、3つの主要な構成要素、すなわち、BMS36を伴うバッテリ32と、スーパーキャパシタバンクCSCおよび結合インダクタLCを伴う、MOSFETトランジスタ(MOSFET)S1およびS2に基づく双方向DC−DCコンバータを伴うスーパーキャパシタモジュール38と、4つのMOSFET S3−S6を伴う四象限Hブリッジトポロジに基づく出力コンバータ52とを有する。図5に示されるように、知的バッテリモジュール132は、バッテリモジュール制御システム200(またはローカル電子制御ユニット(ECU))およびマスタ制御システム210(またはマスタECU)に結合される。
図6は、モータ60に接続され、各位相で直列に接続されたN個の知的バッテリモジュールを備える、3相ACiバッテリパック(130A、130B、130C)のトポロジを描写する。図5および6内の各知的バッテリモジュールは、4つのスイッチS3、S4、S5、およびS6の異なる組み合わせによって、(バッテリの)DC電圧VDCをAC出力に接続することによって、3つの異なる電圧出力、すなわち、+Vdc、0、および−Vdcを生成することができる。+Vdcを取得するために、スイッチS3およびS6が、オンにされる一方で、−Vdcは、スイッチS4およびS5をオンにすることによって取得されることができる。S3およびS5またはS4およびS6をオンにすることによって、出力電圧は、0となる。異なる出力コンバータレベルのそれぞれのAC出力は、合成された電圧波形が、インバータ出力の総和であるように、直列に接続される。ACiバッテリパック内の出力位相電圧レベルの数mは、m=2s+1によって定義され、sは、知的バッテリモジュールの数である。各位相で直列に接続された6つの知的バッテリモジュールを伴うパルス幅変調(PWM)で変調された13レベルACiバッテリパックに関する例示的相電圧波形が、図7Bに提示され、知的バッテリモジュール132のうちの1つの出力電圧が、図7Aに示される。
位相偏移技法の原理は、増分的に偏移された2レベル波形を使用して、マルチレベル出力PWMを生成することである。したがって、NレベルPWM波形が、N−1個の2レベルPWM波形の総和によって生成される。これらの2レベル波形は、基準波形を360°/(N−1)だけ増分的に偏移される三角形キャリアと比較することによって、生成される。9レベル実施例が、図8Aに示される。キャリアは、360°/(9−1)=45°だけ増分的に偏移され、基準波形と比較される。結果として生じた2レベルPWM波形が、図8Cに示される。これらの2レベル波形は、各知的バッテリモジュール内の出力コンバータ(Hブリッジ)MOSFETのためのゲート信号として使用され得る。4つのHブリッジを備える、我々の9レベル実施例に関して、0°信号が、S3に使用され、180°信号が、第1のモジュールのS6に使用され、45°信号が、S3に使用され、225°信号が、第2のモジュールのS6に使用される等となる。全てのHブリッジでは、S4のための信号は、S3を補完し、S5のための信号は、各区間の貫通を回避するように、ある不感時間とともにS6を補完することに留意されたい。
各知的バッテリモジュール内の出力コンバータのスイッチのための切替信号S3÷S6(図5および6参照)を生成することへの別のアプローチは、マルチレベルヒステリシス制御技法である。本制御方法は、任意のタイプのモータと併用されることができ、特にスイッチドリラクタンスモータ(SRM)駆動のために非常に効率的である。
ヒステリシス制御における電圧レベルの選択
9レベルACiバッテリパック動作の1つの位相に関する9レベル四象限ヒステリシス制御技法における電圧レベル間の切替の主要な原理の詳細な説明が、下記に提示される。
充電状態平衡およびゼロ状態回転を伴う9レベル四象限ヒステリシス電流コントローラ500の一般化された機能図が、図11に提示される。これは、以前に説明されたように機能する、切替段階セレクタ300を含む。図9のSum2の出力信号は、図11では「レベル」と名付けられる。本信号は、知的バッテリモジュールの出力コンバータの適切な出力電圧レベルを選択するために本方法でさらに使用される、9レベルヒステリシスコントローラの一般的レベルに関する数値(1から6まで)を表す。
1)各知的バッテリモジュールの充電状態(SOC)に基づいて、要求される出力電圧レベルおよび出力電流の調整を提供するように、ある時間周期にわたって繰り返し切り替えられる必要がある、知的バッテリモジュールの識別。本識別方法論は、ACiバッテリパックの動作の間に充電状態の平衡を確実にする必要がある。これが提供されるとき、バッテリ内に貯蔵される、またはモータから、またはそこに伝達されるエネルギーは、全ての知的バッテリモジュールの間で等しく分配される。これは、各セルが、それらの動作体制に基づく半導体スイッチの具体的温度プロファイルのために設計される必要がある、ACiバッテリパックの正しい動作の必要な条件である。本タスクは、本明細書で提供される方法におけるSOC平衡ブロック(図11参照)によって実施され、本ブロックの主要構成要素としての知的バッテリモジュール回転コントローラ600の機能図が、図12に提示される。
2)SOC平衡ブロックによって識別される知的バッテリモジュールに関して、ゼロ切替状態の回転。本回転は、動作中の具体的モジュール内のスイッチの間のエネルギーの分布を提供する。表1に示されるように、知的バッテリモジュールの出力においてゼロ電圧を提供するための切替の2つの可能性として考えられる組み合わせが存在する。回転方法論は、使用されるスイッチを交代させ、セルの1つおきの正または負の動作レベルとともにゼロ電圧を提供する。実際、本書の次の節に示されるであろうように、本回転は、知的バッテリモジュールおよびACiバッテリパック全体の出力電圧周波数と比較して、スイッチのスイッチング周波数を2倍低減させる。図16A、16B、16C、および16Dに提示される、0VDCから3VDCまでの出力電圧の異なるレベルに関して、本明細書で提供される方法では、4つの回転発生器ブロック1001、1002、1003、および1004が存在する。
知的バッテリモジュール132動作(図5参照)を管理する、パワーエレクトロニクスコンバータおよびローカルECU200が、充電状態(SOC)推定器を利用することを通して稼働し、バッテリの初期SOCを測定する。マスタ制御システム(ECU)210が、図17に描写されるように(図5も参照)、全ての知的バッテリモジュールの本初期SOCデータを受信し、それらを分類する。
知的バッテリモジュール132(図5)のスーパーキャパシタモジュール38は、主要バッテリ32および出力コンバータ52と並列に接続される。加速の間に、キャパシタ電圧は、完全充電(50Vdc)からその公称電圧の約3分の1(17Vdc)まで放電することを可能にされ、それが11kWの有用なエネルギーを送達することを可能にする。本エネルギー量は、30個の知的バッテリモジュールがACiバッテリパック内に設置される場合、1つの知的バッテリモジュールから5秒の間に2.2kWの電力および合計66kWを取り込むことを可能にし、これは、バッテリ寿命への損害がない良好な加速のために十分な電力および時間である。減速(回生制動)の間に、エネルギーは、類似する方法で回収され、スーパーキャパシタを再び充電する。
しかしながら、第2の発振項は、平均バッテリSOCに寄与しない。本成分は、統一性の変調指数におけるグリッド電流振幅の最大2倍に到達し得る、著しいピーク間値を有する。二次電流成分は、いくつかの不利点、例えば、結果として生じる電流RMS値およびバッテリ挙動の周期的変化に関連する内側バッテリ抵抗損失の増加を呈する。
Claims (26)
- 電気自動車であって、
シャーシと、
前記シャーシに動作可能に結合される3つ以上のホイールと、
前記3つ以上のホイールに動作可能に結合される1つ以上の電気モータと、
前記1つ以上のモータに動作可能に結合される1つ以上の知的モジュール式バッテリパックと、
1つ以上のバッテリパックおよび前記1つ以上のモータに動作可能に結合される制御システムと
を備える、電気自動車。 - 前記シャーシは、ドライブトレインがない、請求項1に記載の電気自動車。
- 前記1つ以上のモータは、インホイールモータである、請求項1に記載の電気自動車。
- 前記1つ以上の知的モジュール式バッテリパックは、カスケード型アーキテクチャを有する、請求項1に記載の電気自動車。
- 前記バッテリパックは、複数の相互接続された知的バッテリモジュールを備える、請求項4に記載の電気自動車。
- 前記バッテリモジュールは、ピアツーピア通信能力を伴うネットワーク化された低電圧コンバータ/コントローラ、組み込みウルトラキャパシタ、バッテリ管理システム、および個々のセルの直列に接続されたセットの統合された組み合わせを備える、請求項5に記載の電気自動車。
- 前記バッテリパックは、複数の相互接続された知的バッテリモジュールを備えるニューラルネットワークを備える、請求項1に記載の電気自動車。
- 前記バッテリモジュールは、BMSを伴うバッテリ、スーパーキャパシタモジュール、および出力コンバータの統合された組み合わせを備える、請求項5に記載の電気自動車。
- 前記スーパーキャパシタモジュールは、双方向DC−DCコンバータと、スーパーキャパシタバンクとを含む、請求項8に記載の電気自動車。
- 前記出力コンバータは、四象限Hブリッジを備える、請求項8に記載の電気自動車。
- 前記制御システムは、双方向マルチレベルコントローラを備える、請求項1に記載の電気自動車。
- 前記双方向マルチレベルコントローラは、双方向マルチレベルヒステリシスコントローラである、請求項11に記載の電気自動車。
- 前記双方向マルチレベルコントローラは、温度センサおよびネットワーキングインターフェース論理と組み合わせられる、請求項11に記載の電気自動車。
- 前記制御システムは、モジュール年数、熱的条件、および性能特性に基づいて、モジュールの個々の切替を通してバッテリ利用の平衡を保つように構成される、請求項11−13に記載の電気自動車。
- 前記バッテリパックは、整流器/充電器動作に切替可能である、請求項1−14に記載の電気自動車。
- 複数の相互接続された知的バッテリモジュールを備えるカスケード型アーキテクチャを備える、知的モジュール式バッテリパック。
- 前記バッテリモジュールは、ピアツーピア通信能力を伴うネットワーク化された低電圧コンバータ/コントローラ、組み込みウルトラキャパシタ、バッテリ管理システム、および個々のセルの直列に接続されたセットの統合された組み合わせを備える、請求項16に記載の知的モジュール式バッテリパック。
- 前記相互接続された知的バッテリモジュールは、ニューラルネットワークを備える、請求項16に記載の知的モジュール式バッテリパック。
- 前記バッテリモジュールは、BMSを伴うバッテリ、スーパーキャパシタモジュール、および出力コンバータの統合された組み合わせを備える、請求項16に記載の知的モジュール式バッテリパック。
- 前記スーパーキャパシタモジュールは、双方向DC−DCコンバータと、スーパーキャパシタバンクとを含む、請求項19に記載の知的モジュール式バッテリパック。
- 前記出力コンバータは、四象限Hブリッジを備える、請求項19に記載の知的モジュール式バッテリパック。
- ピアツーピア通信能力を伴う統合型低電圧コンバータ/コントローラ、組み込みウルトラキャパシタ、バッテリ管理システム、および個々のセルの複数の直列に接続されたセットを備える、知的バッテリモジュール。
- 前記コンバータ/コントローラは、四象限Hブリッジを備える、請求項22に記載の知的バッテリモジュール。
- 知的バッテリモジュールであって、
統合型BMSを伴うバッテリと、
前記バッテリに動作可能に結合されるスーパーキャパシタモジュールと、
前記バッテリおよび前記スーパーキャパシタモジュールに動作可能に結合される出力コンバータと
を備える、知的バッテリモジュール。 - 前記スーパーキャパシタモジュールは、双方向DC−DCコンバータと、スーパーキャパシタバンクとを含む、請求項24に記載の知的バッテリモジュール。
- 前記出力コンバータは、四象限Hブリッジを備える、請求項24に記載の知的バッテリモジュール。
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CN112188969A (zh) | 2021-01-05 |
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CL2020002422A1 (es) | 2021-01-29 |
IL277189A (en) | 2020-10-29 |
ZA202005538B (en) | 2022-01-26 |
US11840150B2 (en) | 2023-12-12 |
SA520420181B1 (ar) | 2022-10-25 |
US11840149B2 (en) | 2023-12-12 |
KR20200135399A (ko) | 2020-12-02 |
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