ソリューション概要
バッテリ・マネージメント・システム(BMS)は、電気自動車の蓄電システムのライフサイクル、健全性、安全性を向上させます。
個々のバッテリ・セルの電流、電圧、温度を測定し、その情報をマイクロコントローラに送信して処理します。マイコンに搭載されたソフトウェアは、このデータに基づき、各バッテリ・セルの充電状態(SOC)と健全性(SOH)を判断し、高効率のセル・バランシングを確保し、バッテリの持続時間を延ばすことで、最高のパフォーマンスを実現します。
BMSソリューションの主なコンポーネント
このカスタマイズ可能なソリューションは、従来の低電圧のバッテリから400V、800V、1200Vまでのバッテリに対応できる、非常にスケーラブルなバッテリ・マネージメント・システムです。
L9963Eリチウムイオン・バッテリのモニタリングおよびバランシング・チップは、非同期遅延なしで、直列接続された4個~14個のセルを測定できる独自のアーキテクチャを採用しています。
汎用SPI / 絶縁型SPIトランシーバのL9963Tは、異なる電圧ドメインにあるデバイス間の通信を実現します。このデバイスは、8bit~64bit長のSPIフレームで構成される任意のプロトコルをサポートするように設計されており、非常に高い柔軟性を備えています。従来の4線SPIインタフェースから受信した通信データを2線の絶縁インタフェースに送信できます(逆も可能)。すべての機能は、デュアルコアSPC58EC80E5車載用マイコンによって管理されます。
2つの実現可能なBMS設定
「集中アクセス」バージョンと「デュアル・アクセス・リング」バージョンの2種類の設定に対応できます。
集中化接続化されたデイジー・チェーンでは、SPC58EC80E5マイコンは、SPIを介してL9963T(低電圧ドメイン)に接続されます。このトランシーバはマイコンをBMSチェーン(高電圧ドメイン、すなわち絶縁型SPI通信を必要とする過酷な車載環境)に接続します。
双方向通信用にもう1台トランシーバを追加すれば、デュアル・アクセス・リング設定も可能です。2次リングは、1次リングが故障した場合の予備として使用されます。
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搭載製品の特徴
SPC58EC80E5:車載用マイクロコントローラ
SPC58EC80E5マイコンは、SPC58シリーズの製品であり、包括的かつ利便性に優れたSPC5開発エコシステムを利用できます。
L9963E:バッテリ・モニタ
L9963Eは、信頼性の高い車載アプリケーションや蓄電システム向けに、リチウムイオン・バッテリのモニタリングおよびバランシング機能を備えています。単体で最大14のバッテリ・セルをモニタリング可能で、48V以上の高電圧システムの要件を満たします。
L9963T:絶縁型SPIトランシーバ
L9963Tは、異なる電圧ドメインにあるデバイス間の通信を実現する汎用SPI / 絶縁型SPIトランシーバです。
従来の4線SPIインタフェースから受信した通信データを2線の絶縁インタフェースに送信できます(逆も可能)。
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All Features
- 先進的な機能
- 安全機能(温度制御)
- SOCおよびSOH
- 高精度測定
- 優れた性能
- 高い信頼性
- 走行距離の延長
- バッテリ寿命の延長
- 先進的な機能
販売代理店在庫 AEK-COM-ISOSPI1
販売代理店 | 地域 | 在庫 | 最小発注数量 | パートナー企業リンク |
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販売代理店在庫データ:
販売代理店在庫データ:
在庫
Min.Order
販売代理店在庫 AEK-POW-BMS63EN
販売代理店 | 地域 | 在庫 | 最小発注数量 | パートナー企業リンク |
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販売代理店在庫データ:
販売代理店在庫データ:
在庫
Min.Order
販売代理店在庫 AEK-MCU-C4MLIT1
販売代理店 | 地域 | 在庫 | 最小発注数量 | パートナー企業リンク |
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販売代理店在庫データ:
販売代理店在庫データ:
在庫
Min.Order
このバッテリ・マネージメント・システム(BMS)評価ボード(AEK-POW-BMS63EN)は、STのAutoDevKit開発エコシステムの一部です。直列接続された、それぞれの最大電圧値が4.2Vのバッテリ・セルを4個~14個管理できます。デイジー・チェーン・トポロジは、1個~31個のリチウムイオン・バッテリ・ノードに対応できます。
このボードは、STのL9963Eリチウムイオン・バッテリのモニタリングおよびバランシング・チップを中心に構築されています。精巧なモニタリング・ネットワークを提供して、各セルの電圧、直列の電流、および5つの温度値(NTCセンサ使用)を正確に検出します。この検出機能は、各バッテリ・セルの充電状態(SOC)と健全性(SOH)を評価し、その結果として完全なバッテリ・パックのSOCとSOHを見極めるために使用されます。これらの高精度の測定により、パッシブ・セル・バランシングを実行できます。
L9963Eにネイティブに対応可能で、汎用L9936Tトランシーバをベースとするこの汎用SPI / 絶縁型SPIドングル(AEK-COM-ISOSPI1)は、SPI信号を絶縁型SPI信号に変換し、必要なワイヤ数を4本から2本に削減します。ISOSPIプロトコルは、BOMの最適化に加え、差動信号を利用してさらに高いノイズ耐性と堅牢性を実現し、長距離通信に対応します。
SPC58 Cライン・ディスカバリ・ボード(AEK-MCU-C4MLIT1)は、4MBのFlashメモリを搭載したデュアルコアSPC58EC80E5 32bit車載用ASIL-Bマイコンをベースとしています。開発者は、ISO CAN FD(トランシーバ付き)やUARTを含むすべてのコア、GPIOおよびペリフェラルを利用できます。さらに、このマイコンに内蔵されたハードウェア・セキュリティ・モジュール(HSM)により、EVITA Medium規格に準拠しています。
BMSボードは、SPC58 Cライン・ディスカバリ・ボードを介して接続され、1個(集中設定)または2個(デュアル・アクセス・リング設定)のAEK-COM-ISOSPI1ドングルと通信します。これらの汎用トランシーバは、SPI信号を絶縁型SPI信号に変換します(逆も可能)。それにより、必要なワイヤ数を4本から2本に削減するとともに、差動信号を実装してさらに高いノイズ耐性を実現します。
AutoDevKit開発エコシステムの一部である、すぐに使用可能なソフトウェア・パッケージには、リチウムイオン・バッテリ・セルのSOCとSOHを測定および監視するためのサンプル・コードが付属しています(1つは集中設定用、もう1つはデュアル・アクセス・リング設定用)。各バッテリ・パックのSOCは異なる場合があるため、バランシングを実行してすべてを同じ充電レベルにする必要があります。バッテリ・パック内でバッテリの充電レベルが最低のセルを検出した後、その他のすべてのバッテリ・セルは、そのレベルになるまで放電されます。
Estimated cost
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評価ボード概要
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AutoDevKit BMS評価キットには、以下の機能が搭載されています。
- 電圧、電流および温度検知
- 汎用SPI / 絶縁型SPI通信
このボードでサポートされている追加機能:
- 2つの実現可能なBMS実装(集中およびデュアル・アクセス・リング)
デバイス保護およびスーパーバイザの機能:
- SOCおよびSOH
- パッシブ・セル・バランシング
- セルのオープン・ワイヤ診断
- PCBセル・オープン診断
- チップ過熱
- バランシング・オープン負荷診断
- バランシング・ショート負荷診断
- 電圧レギュレータOV / UV診断
- 通信完全性
- 通信損失の検出
- GND損失の検出
AutoDevKit BMS評価キットには、以下の機能が搭載されています。
- 電圧、電流および温度検知
- 汎用SPI / 絶縁型SPI通信
このボードでサポートされている追加機能:
- 2つの実現可能なBMS実装(集中およびデュアル・アクセス・リング)
デバイス保護およびスーパーバイザの機能:
- SOCおよびSOH
- パッシブ・セル・バランシング
- セルのオープン・ワイヤ診断
- PCBセル・オープン診断
- チップ過熱
- オープン負荷バランシング診断
- ショート負荷バランシング診断
- 電圧レギュレータOV / UV診断
- 通信完全性
- 通信損失の検出
- GND損失の検出
Automotive Analog and Power
Automotive Microcontrollers
製品型番 | 概要 |
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SPC58EC80E5 | 32-bit Power Architecture MCU for Automotive General Purpose Applications - Chorus family |