JP2021141674A - 急速充電装置及び急速充電方法 - Google Patents
急速充電装置及び急速充電方法 Download PDFInfo
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Abstract
Description
本実施形態に係る急速充電装置は、二次電池としての固体電池の急速充電が可能な装置である。固体電池は、例えば大電流、高電圧を要する車載用等の用途に用いられる、複数の固体電池を組み合わせてモジュール化された固体電池モジュールである。
本実施形態に係る急速充電装置は、識別部と、温度取得部と、充電部と、制御部と、を有する。急速充電装置は、充電対象である固体電池及び固体電池を冷却する冷却システムと、CAN通信等の通信手段により通信可能に構成される。
制御部は、上記識別部、温度取得部、充電部、及び外部に設けられる固体電池の冷却システムと通信可能に構成される。制御部は、温度取得部により取得された固体電池の温度が所定温度T2以上である場合、固体電池を冷却する制御を行う。例えば、上記冷却システムを稼働させる制御を行う。また、上記に加え、固体電池の急速充電時に固体電池に供給される充電電流I1を低下させる制御を行ってもよい。上記制御により、固体電池の温度は所定温度T2に達した後、所定温度T2未満の一定の温度領域内に維持される。
本実施形態に係る急速充電装置の充電対象である二次電池としての固体電池は、固体の電解質を備える二次電池である。固体電池は、電解質が液体であるリチウムイオン電池等よりも耐熱性に優れ、高温での充電が可能である。例えば、電池劣化や安全性を考慮した場合、リチウムイオン電池の充電温度の上限は40℃前後であるが、固体電池は充電温度を60℃以上、又は80℃以上とした場合に、優れた充電効率が得られる。
固体電池を大電流、高電圧を要する車載用等の用途に用いる場合、複数の固体電池を組み合わせてモジュール化した固体電池モジュールが用いられる。本実施形態に係る急速充電装置の充電対象である固体電池モジュールの構成に関して、図面を用いて以下説明する。
図1は、固体電池モジュール100の構成を示す断面図である。固体電池モジュール100は、複数の固体電池セル101と、モジュール構成部材110と、トップカバー113と、バインドバー114と、ロワープレート115と、セパレータ116と、エンドプレート117と、熱伝導材118と、冷却水119と、を備える。
上記複数のセンサはセンサユニットとして構成されていてもよい。上記複数のセンサは、CAN通信線(図示省略)により、急速充電装置における温度取得部とCAN通信可能に構成される。
本実施形態に係る急速充電方法について、図4に示すフロー図を用いて以下説明する。
図4に示すように、本実施形態に係る急速充電方法は、識別ステップS1と、SOC取得ステップS2と、SOC確認ステップS3及びS11と、電池温度取得ステップS4と、電池温度確認ステップS5、S7及びS9と、加温ステップS6と、給電ステップS8、S10、S12及び13と、を有する。
Claims (12)
- 二次電池としての固体電池に電流を供給する充電部と、
前記固体電池の温度を取得する温度取得部と、
前記温度取得部により取得された温度が所定温度以上である場合、前記固体電池を冷却する制御を行う制御部と、を有する急速充電装置。 - 前記制御部は、前記固体電池の内部抵抗に対する前記固体電池の温度変化を示す曲線において、複数の変曲点を検出し、
前記所定温度は、前記複数の変曲点のうち、高温側の変曲点に対応する温度である、請求項1に記載の急速充電装置。 - 前記所定温度は60℃である、請求項1に記載の急速充電装置。
- 前記所定温度は80℃である、請求項1に記載の急速充電装置。
- 前記温度取得部により取得される固体電池の温度は、タブ温度である、請求項1から4のいずれかに記載の急速充電装置。
- 前記二次電池の種類を識別する識別部を有し、
前記制御部は、前記識別部により前記二次電池が固体電池であると識別され、かつ、前記温度取得部により取得された温度が所定温度以上である場合に、前記固体電池を冷却する制御を行う、請求項1から5のいずれかに記載の急速充電装置。 - 二次電池としての固体電池の温度を取得する温度取得ステップと、
前記温度取得ステップにより取得された温度が所定温度以上であるか否かを判定する判定ステップと、
前記固体電池及び冷却システムのうち少なくともいずれかに電流を供給する給電ステップと、を有し、
前記固体電池の温度は、所定温度未満となるように維持される、急速充電方法。 - 前記所定温度は、前記固体電池の内部抵抗に対する前記固体電池の温度変化を示す曲線における、複数の変曲点のうち、高温側の変曲点に対応する温度である、請求項7に記載の急速充電方法。
- 前記所定温度は60℃である、請求項7に記載の急速充電方法。
- 前記所定温度は80℃である、請求項7に記載の急速充電方法。
- 前記温度取得ステップにより取得される固体電池の温度は、タブ温度である、請求項7から10のいずれかに記載の急速充電方法。
- 前記二次電池の種類を識別する識別ステップを有する、請求項7から11のいずれかに記載の急速充電方法。
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JP2020036194A JP7399750B2 (ja) | 2020-03-03 | 2020-03-03 | 急速充電装置及び急速充電方法 |
US17/184,613 US12059974B2 (en) | 2020-03-03 | 2021-02-25 | Fast charger and fast charging method |
CN202110211512.2A CN113352942B (zh) | 2020-03-03 | 2021-02-25 | 快速充电装置和快速充电方法 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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EP4368445A1 (en) | 2022-11-14 | 2024-05-15 | Toyota Jidosha Kabushiki Kaisha | Vehicle and vehicle control method |
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US20210276453A1 (en) | 2021-09-09 |
US12059974B2 (en) | 2024-08-13 |
CN113352942A (zh) | 2021-09-07 |
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