JP2021124322A - 電池診断装置、及び電池診断方法 - Google Patents
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Abstract
【解決手段】電源電圧が所定電圧未満から所定電圧以上になったことを検知する電源監視部5と、電源電圧が所定電圧以上になったことを検知した後の所定期間に電池電圧を測定し、電池電圧に基づき電池1の残容量に関する電力を算出し、電池1の残容量に関する電力に基づき電池1の劣化判定を行う制御部4と、を備える。
【選択図】図1
Description
前記電源電圧が前記所定電圧以上になったことを検知した後の所定期間に電池電圧を測定し、前記電池電圧に基づき電池の残容量に関する電力を算出し、前記電池の残容量に関する電力に基づき前記電池の劣化判定を行う制御部と、
を備える。
前記電池が劣化状態であると判定された場合にアラートを出力する出力部を備えてもよい。
前記制御部は、前記電池の残容量に関する電力が前記閾値未満である場合又は所定回数連続して発生した場合、リフレッシュ電流を流した後に測定した電池電圧で再度算出した電力に基づき、前記劣化判定を行ってもよい。
電源電圧が所定電圧未満から前記所定電圧以上になったことを検知するステップと、
前記電源電圧が前記所定電圧以上になったことを検知した後の所定期間に電池電圧を測定し、電池の残容量に関する電力を算出するステップと、
前記電池の残容量に関する電力に基づき、前記電池の劣化判定を行うステップと、
を含む。
(1)電池の周囲温度により、公称容量(例えば満状態の容量)が大きく変化する。例えば高温環境で保管した場合は公称容量が半分以下に減少する。
(2)高温環境で使用すると、電池内部に塩化被膜が生成されて内部抵抗が上昇し、大電流使用時に電圧が低下する。この状態で装置が急激に高負荷動作に遷移した場合、所望の電圧を保つことができず、安定動作を維持できなくなる恐れがある。この場合、電池内に十分な容量が残っていても、電池を使用することができない。
(3)電池の容量がなくなる直前又は近くまで、ほぼ一定の開放電圧を維持するため、電池電圧測定では、劣化状態を把握することが困難である。
Pbat = Vb2/R・・・・・・・・・・・・・・(1)
Pbatは、塩化チオニルリチウム一次電池1の残容量に関する電力であり、Vbは有負荷時の電池電圧であり、Rは負荷電流回路3の放電用抵抗31の抵抗値である。計数部112は、算出した電力値(Pbat)を電池診断部116に渡す。なお、Pbatは、塩化チオニルリチウム一次電池1から電池診断装置10の内部に供給可能な電力である。
2 定電圧回路部
3 負荷電流回路
4 制御部
5 電源監視部
6 定電圧回路一次側電圧保持手段
7 出力部
8 記憶部
10 電池診断装置
31 放電用抵抗
32 放電用スイッチ
61 ダイオード
62 コンデンサ
111 AD変換部
112 計数部
113 放電電流制御部
114 リセット管理部
115 温度測定部
116 電池診断部
Claims (10)
- 電源電圧が所定電圧未満から前記所定電圧以上になったことを検知する電源監視部と、
前記電源電圧が前記所定電圧以上になったことを検知した後の所定期間に電池電圧を測定し、前記電池電圧に基づき電池の残容量に関する電力を算出し、前記電池の残容量に関する電力に基づき前記電池の劣化判定を行う制御部と、
を備える電池診断装置。 - 請求項1に記載の電池診断装置であって、
前記制御部は、前記電池の残容量に関する電力が閾値未満である場合に前記電池が劣化状態であると判定し、
前記電池が劣化状態であると判定された場合にアラートを出力する出力部を備える、
電池診断装置。 - 請求項2に記載の電池診断装置であって、
前記制御部は、前記電池の残容量に関する電力が閾値未満である場合が所定回数連続して発生した場合に前記電池が劣化状態であると判定する電池診断装置。 - 請求項2又は3に記載の電池診断装置であって、
前記電池は、塩化チオニルリチウム一次電池であり、
前記制御部は、前記電池の残容量に関する電力が前記閾値未満である場合又は所定回数連続して発生した場合、リフレッシュ電流を流した後に測定した電池電圧で再度算出した電力に基づき、前記劣化判定を行う、電池診断装置。 - 請求項1乃至4のいずれか一項に記載の電池診断装置であって、
前記制御部は、前記電池が劣化状態であると判定した場合に自装置の動作モードを省電力モードに移行させる電池診断装置。 - 請求項1乃至4のいずれか一項に記載の電池診断装置であって、
前記制御部は、前記電池の残容量に関する電力と複数の閾値レベルとを比較し、前記電池の劣化の程度をレベル分けし、前記劣化の程度に応じて自装置の動作モードを変更する電池診断装置。 - 請求項1乃至6に記載の電池診断装置において、
前記制御部はさらに、前記電池の開放電圧に基づき前記劣化判定を行う、電池診断装置。 - 請求項1乃至7のいずれか一項に記載の電池診断装置であって、
前記制御部はさらに、定期的に測定された前記電池の残容量に関する電力の推移に基づき前記劣化判定を行うか否かを決定する、電池診断装置。 - 請求項1乃至8に記載の電池診断装置において、
前記制御部はさらに、前記電池の周囲温度に基づき前記劣化判定を行うか否かを決定する、電池診断装置。 - 電源電圧が所定電圧未満から前記所定電圧以上になったことを検知するステップと、
前記電源電圧が前記所定電圧以上になったことを検知した後の所定期間に電池電圧を測定し、電池の残容量に関する電力を算出するステップと、
前記電池の残容量に関する電力に基づき、前記電池の劣化判定を行うステップと、
を含む電池診断方法。
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JP2020016489A JP2021124322A (ja) | 2020-02-03 | 2020-02-03 | 電池診断装置、及び電池診断方法 |
EP21153774.1A EP3859364A1 (en) | 2020-02-03 | 2021-01-27 | Battery diagnostic apparatus and battery diagnostic method |
US17/161,061 US11686775B2 (en) | 2020-02-03 | 2021-01-28 | Battery diagnostic apparatus and battery diagnostic method |
CN202110143301.XA CN113281669A (zh) | 2020-02-03 | 2021-02-02 | 电池诊断装置、以及电池诊断方法 |
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US11686775B2 (en) | 2023-06-27 |
US20210239765A1 (en) | 2021-08-05 |
CN113281669A (zh) | 2021-08-20 |
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