JP2018096960A - 蓄電池の自己放電電流特性を求めるシステム及び方法 - Google Patents
蓄電池の自己放電電流特性を求めるシステム及び方法 Download PDFInfo
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/374—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with means for correcting the measurement for temperature or ageing
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Abstract
Description
205 処理ユニット
210 電圧源
211、212 出力端子
213 スイッチ
215 第1の電圧測定回
220 第2の電圧測定回路
225 電流測定回路
230 蓄電池
Claims (10)
- 第1の電圧分解能を提供する第1の電圧測定回路を用いることによって蓄電池又は蓄電池のバンクのうちの一方の一対の端子の両端の開回路電圧を測定することと、
前記第1の電圧測定回路を用いて測定された前記開回路電圧を用いることによって少なくとも部分的に求められた第1のポテンショスタット電圧を、前記蓄電池又は前記蓄電池のバンクのうちの前記一方に提供することと、
前記第1の電圧分解能よりも高い第2の電圧分解能を提供するように構成された第2の電圧測定回路を用いることによって、前記蓄電池又は前記蓄電池のバンクのうちの前記一方の前記一対の端子のうちの一方において端子電圧を測定することと、
前記第2の電圧測定回路を用いて測定された前記端子電圧に少なくとも部分的に基づいている第2のポテンショスタット電圧を、前記蓄電池又は前記蓄電池のバンクのうちの前記一方に提供することと、
前記第2のポテンショスタット電圧を前記蓄電池又は前記蓄電池のバンクのうちの前記一方に提供した後に、一定期間にわたって前記蓄電池又は前記蓄電池のバンクのうちの前記一方に対して1つ又は複数の自己放電漏れ電流測定を実行することと、
前記1つ又は複数の自己放電漏れ電流測定を用いて、前記蓄電池又は前記蓄電池のバンクのうちの前記一方の自己放電漏れ電流特性を求めることと
を含む、方法。 - 前記第1の電圧測定回路は、ミリボルトレベルの分解能を提供し、前記第2の電圧測定回路は、マイクロボルトレベルの分解能を提供し、前記一対の端子のうちの前記一方は、前記蓄電池又は前記蓄電池のバンクのうちの前記一方の負極端子である、請求項1に記載の方法。
- 前記ミリボルトレベルの分解能は、低利得増幅器又はユニティゲイン増幅器のうちの一方を用いることによって少なくとも部分的に得られ、前記マイクロボルトレベルの分解能は、高利得増幅器を用いることによって少なくとも部分的に得られる、請求項2に記載の方法。
- 前記一対の端子の両端の前記開回路電圧を測定する前に、前記蓄電池又は前記蓄電池のバンクのうちの前記一方に対して電圧温度係数(TCV)特性化手順を実行することを更に含み、前記TCV特性化手順は、ゼロのTCV値又は既定の閾値未満の1つ若しくは複数のTCV値のうちの少なくとも一方を識別することを含む、請求項1に記載の方法。
- 前記TCV特性化手順を実行することは、
前記蓄電池又は前記蓄電池のバンクのうちの前記一方を複数の充電状態(SOC)レベルのそれぞれに設定することと、
前記複数のSOCレベルのそれぞれに設定されると、前記蓄電池又は前記蓄電池のバンクのうちの前記一方を少なくとも2つの温度レベルの間で循環させることと、
前記蓄電池又は前記蓄電池のバンクのうちの前記一方を前記少なくとも2つの温度レベルの間で循環させるとき、前記複数のSOCレベルに対応する複数のTCV値を求めることと、
前記ゼロのTCV値又は前記既定の閾値未満の前記1つ若しくは複数のTCV値のうちの前記少なくとも一方を識別することに前記複数のTCV値を用いることと
を含む、請求項4に記載の方法。 - 前記ゼロのTCV値又は既定の閾値未満の前記1つ若しくは複数のTCV値のうちの前記少なくとも一方を識別することは、前記複数のTCV値対前記複数のSOCレベルのグラフ表示を用いることを含む、請求項5に記載の方法。
- 前記一対の端子の両端の前記開回路電圧を測定する前に、前記ゼロのTCV値又は前記既定の閾値未満の前記1つ若しくは複数のTCV値のうちの前記少なくとも一方を用いて、前記蓄電池又は前記蓄電池のバンクのうちの前記一方の初期充電状態(SOC)レベル設定することを更に含む、請求項4に記載の方法。
- 前記第1の電圧測定回路は、第1のアナログ/デジタル変換器(ADC)と、前記蓄電池又は前記蓄電池のバンクのうちの前記一方の前記開回路電圧を前記第1のADCに結合する低利得増幅器又はユニティゲイン増幅器のうちの一方とを備え、前記第
2の電圧測定回路は、第2のADCと、高利得増幅器とを備える、請求項1に記載の方法。 - 前記第2の電圧測定回路及び電流測定回路が、前記第2の電圧測定回路の1つ又は複数の機能を実行し、前記1つ又は複数の自己放電漏れ電流測定を実行するデュアル機能回路として提供される、請求項8に記載の方法。
- 前記第1の電圧測定回路は、前記蓄電池若しくは前記蓄電池のバンクのうちの前記一方の前記一対の端子のうちの前記一方における前記端子電圧、又は前記蓄電池若しくは前記蓄電池のバンクのうちの前記一方の自己放電漏れ電流のうちの一方を測定する処理ユニットによって制御される1つ又は複数のスイッチを備えるデュアル機能回路である、請求項1に記載の方法。
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DE102017201417A1 (de) | 2018-06-14 |
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