JP2021018133A - 電池監視装置 - Google Patents
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Abstract
Description
以下、「電池監視装置」を車両(例えば、ハイブリッド車や電気自動車)の電源システムに適用した第1実施形態について、図面を参照しつつ説明する。
次に、第2実施形態の電池監視装置50について説明する。第2実施形態の電池監視装置50は、いわゆる2位相ロックイン検出を実施する。以下、詳しく説明する。なお、以下では、各実施形態で互いに同一又は均等である部分には同一符号を付しており、同一符号の部分についてはその説明を援用する。
次に、第3実施形態の電池監視装置50について説明する。第3実施形態の電池監視装置50は、信号解析において、高速フーリエ変換(FFT)を実施する。以下、詳しく説明する。なお、以下では、各実施形態で互いに同一又は均等である部分には同一符号を付しており、同一符号の部分についてはその説明を援用する。
第1実施形態では、電池セル42毎に電池監視装置50を設けたが、複数の電池セル42ごと(例えば、電池モジュール41ごと、組電池40ごと)に、電池監視装置50を設けてもよい。その際、電池監視装置50の機能の一部を共通化してもよい。以下、第4実施形態の電池監視装置50について説明する。なお、以下では、各実施形態で互いに同一又は均等である部分には同一符号を付しており、同一符号の部分についてはその説明を援用する。
第2実施形態では、電池セル42毎に電池監視装置50を設けたが、複数の電池セル42ごと(例えば、電池モジュール41ごと、組電池40ごと)に、電池監視装置50を設けてもよい。その際、電池監視装置50の機能の一部を共通化してもよい。以下、第5実施形態の電池監視装置50について説明する。なお、以下では、各実施形態で互いに同一又は均等である部分には同一符号を付しており、同一符号の部分についてはその説明を援用する。
第3実施形態では、電池セル42毎に電池監視装置50を設けたが、複数の電池セル42ごと(例えば、電池モジュール41ごと、組電池40ごと)に、電池監視装置50を設けてもよい。その際、電池監視装置50の機能の一部を共通化してもよい。以下、第6実施形態の電池監視装置50について説明する。なお、以下では、各実施形態で互いに同一又は均等である部分には同一符号を付しており、同一符号の部分についてはその説明を援用する。
上記実施形態を以下のように変更してもよい。
Claims (9)
- 電解質と複数の電極とを含む蓄電池の状態を監視する電池監視装置(50)において、
第1電気経路(81)と接続されており、前記第1電気経路を介して、前記蓄電池から駆動電力が供給される電源供給部(51a,51b)と、
第2電気経路(82)と接続されており、前記第2電気経路を介して、前記蓄電池の端子間電圧を入力する電圧測定部(57a,57b)と、
第3電気経路(83)と接続されており、前記第3電気経路を介して、所定の交流信号を出力させる信号制御部(56)と、
第4電気経路(84)と接続されており、前記第4電気経路を介して、前記交流信号に対する前記蓄電池の応答信号を入力する応答信号入力部(58a,58b)と、
前記応答信号に基づいて前記蓄電池の複素インピーダンスを算出する演算部(53,155,201)と、を備え、
前記信号制御部は、監視対象である前記蓄電池を電源として、所定の交流信号を出力させるように構成されており、
前記第1電気経路、前記第2電気経路、前記第3電気経路、及び前記第4電気経路のうち少なくとも1の電気経路は、途中で他のいずれか1又は複数の電気経路と合流し、合流した電気経路は、前記蓄電池に接続されている電池監視装置。 - 前記第1電気経路は、途中で前記第3電気経路に合流して第5電気経路となり、当該第5電気経路は、前記蓄電池に接続されている請求項1に記載の電池監視装置。
- 前記第2電気経路は、前記第1電気経路及び前記第3電気経路とは、別に設けられている請求項1又は2に記載の電池監視装置。
- 前記第4電気経路は、前記第1電気経路及び前記第3電気経路とは、別に設けられている請求項1〜3のうちいずれか1項に記載の電池監視装置。
- 前記第2電気経路は、途中で前記第4電気経路に合流して第6電気経路となり、当該第6電気経路は、前記蓄電池に接続されている請求項1〜4のうちいずれか1項に記載の電池監視装置。
- 前記応答信号入力部に接続されている電気経路の蓄電池側接続端部は、他の電気経路の蓄電池側接続端部に比較して、前記蓄電池の電源端子のうち、より電極に近い部分に接続されている請求項1〜5のうちいずれか1項に記載の電池監視装置。
- 前記蓄電池は、複数設けられ、前記各蓄電池の電源端子は、互いにバスバー(73)を介して接続されることにより、組電池が構成されており、
少なくとも前記応答信号入力部に接続されている電気経路の蓄電池側接続端部は、前記バスバーを介さずに前記電源端子に対して直接接続されている請求項1〜6のうちいずれか1項に記載の電池監視装置。 - 前記蓄電池は、複数設けられ、前記各蓄電池の電源端子は、互いにバスバー(73)を介して直列に接続されることにより、組電池が構成されており、
前記電池監視装置は、前記組電池を構成する各蓄電池をそれぞれ監視するように、少なくとも前記電圧測定部と、前記信号制御部と、前記応答信号入力部と、を蓄電池ごとに備える一方、前記電源供給部は、前記組電池に対して1つ設けられおり、
当該電源供給部の正極側端子に接続されている第1電気経路は、直列方向において前記組電池の正極側端部に位置する前記蓄電池の正極側電源端子に接続されている第3電気経路と合流するように構成されており、
当該電源供給部の負極側端子に接続されている第1電気経路は、直列方向において前記組電池の負極側端部に位置する前記蓄電池の負極側電源端子に接続されている第3電気経路と合流するように構成されている請求項1〜7のうちいずれか1項に記載の電池監視装置。 - 前記蓄電池は、複数設けられ、前記蓄電池のうち、第1の蓄電池の正極側電源端子と、前記第1の蓄電池に隣接する第2の蓄電池の負極側電源端子とが、バスバーにより直列に接続されている場合、当該第1の蓄電池に対応する信号制御部の正極側端子と接続されている第3電気経路と、当該第2の蓄電池に対応する信号制御部の負極側端子と接続されている第3電気経路は、途中で合流して、当該バスバーに接続されている請求項1〜8のうちいずれか1項に記載の電池監視装置。
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