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1. WO2020108970 - METHOD AND DEVICE FOR ESTIMATING THE STATE OF HEALTH OF AN EXCHANGEABLE RECHARGEABLE BATTERY

Publication Number WO/2020/108970
Publication Date 04.06.2020
International Application No. PCT/EP2019/080845
International Filing Date 11.11.2019
IPC
G01R 31/392 2019.01
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge
392Determining battery ageing or deterioration, e.g. state of health
H02J 7/00 2006.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
7Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
CPC
G01R 31/3842
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
382Arrangements for monitoring battery or accumulator variables, e.g. SoC
3842combining voltage and current measurements
G01R 31/387
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
385Arrangements for measuring battery or accumulator variables
387Determining ampere-hour charge capacity or SoC
G01R 31/389
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
389Measuring internal impedance, internal conductance or related variables
G01R 31/392
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
392Determining battery ageing or deterioration, e.g. state of health
H02J 7/00
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
7Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H02J 7/0042
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
7Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
0042characterised by the mechanical construction
Applicants
  • ROBERT BOSCH GMBH [DE]/[DE]
Inventors
  • GONSER, Andreas
  • NICKLAUS, Mischa
  • SEIBERT, Marc-Alexandre
Priority Data
10 2018 220 251.626.11.2018DE
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) VERFAHREN UND VORRICHTUNG ZUR ABSCHÄTZUNG DES GESUNDHEITSZUSTANDS EINES WECHSELAKKUS
(EN) METHOD AND DEVICE FOR ESTIMATING THE STATE OF HEALTH OF AN EXCHANGEABLE RECHARGEABLE BATTERY
(FR) PROCÉDÉ ET DISPOSITIF D’ESTIMATION DE L’ÉTAT DE SANTÉ D’UNE BATTERIE RECHARGEABLE
Abstract
(DE)
Vorgeschlagen wird ein Verfahren zur Abschätzung des Gesundheitszustands eines Wechselakkus (12), insbesondere eines Wechselakkupacks (12) für Elektrowerkzeuge, mit zumindest folgenden erfindungsgemäßen Verfahrensschritten: i. Bestimmung einer Restkapazität des Wechselakkus (12) während eines Aufladevorgangs derart, dass ▪ ein erster Ladewert (C1) durch Messung einer Leerlaufspannung (UI) ermittelt wird, solange noch kein oder nur ein minimaler Ladestrom (lC) fließt, ▪ zumindest ein weiterer Ladewert (Cn) durch Messung des Ladestroms (lCn) in definierten Zeitabständen (t2b, t2c) ermittelt wird, bis der Aufladevorgang abgeschlossen ist und ▪ eine Summe der ermittelten Ladewerte (C1 + ∑nCn) berechnet wird; ii. Bestimmung einer restlichen Leistungsfähigkeit des Wechselakkus (12) während des Aufladevorgangs derart, dass ▪ nach Erreichen einer vordefinierten Akkuspannung (UCT) kurzzeitig der Ladestrom (lC, ICH, ICL) verändert und die jeweilige Akkuspannung (UC, UC1, UC2) gemessen wird und ▪ eine Impedanz (Z) des Wechselakkus (12) aus dem Quotienten der Differenz der gemessenen Ladeströme (ICH - ICL) und Akkuspannungen (UC1 - UC2) berechnet wird. Weiterhin werden ein Ladegerät und ein Wechselakku zur Durchführung des erfindungsgemäßen Verfahrens vorgeschlagen.
(EN)
The invention relates to a method for estimating the state of health of an exchangeable rechargeable battery (12), particularly an exchangeable rechargeable battery pack (12) for power tools, comprising at least the following method steps according to the invention: i. determining the residual capacity of the exchangeable rechargeable battery (12) during a charging process such that ▪ a first charge value (C1) is determined by measuring an off-load voltage (UI), as long as no current or only a minimum charging current (lC) is flowing, ▪ at least one further charge value (Cn) is determined by measuring the charging current (lCn) at defined time intervals (t2b, t2c), until the charging process is concluded and ▪ a total of the charge values determined (C1 + ∑nCn) is calculated; ii. determining the residual power capacity of the exchangeable rechargeable battery (12) during the charging process such that ▪ after a predefined battery voltage (UCT) has been reached, the charging current (lC, ICH, ICL) is briefly changed, and the specific battery voltage (UC, UC1, UC2) is measured, and ▪ an impedance (Z) of the exchangeable rechargeable battery (12) is calculated from the quotient of the difference between the measured charging currents (ICH - ICL) and battery voltages (UC1 - UC2). The invention further relates to a charger and to an exchangeable rechargeable battery for carrying out the method according to the invention.
(FR)
L’invention concerne un procédé d’estimation de l’état de santé d’une batterie rechargeable (12), notamment d’un bloc-batterie rechargeable (12) pour un outil électrique. Le procédé comprend au moins les étapes suivantes: i. détermination d’une capacité résiduelle de la batterie rechargeable (12) pendant un processus de charge, de telle sorte ▪ qu’une première valeur de charge (C1) est déterminée en mesurant une tension en circuit ouvert (UI) tant qu’il ne circule pas de courant de charge (lC) ou que celui-ci ne circule qu’en quantité minimale, ▪ qu’au moins une autre valeur de charge (Cn) est déterminée en mesurant le courant de charge (lCn) à des intervalles de temps définis (t2b, t2c) jusqu’à la fin du processus de charge, et ▪ qu’une somme des valeurs de charge déterminées (C1 + ∑nCn) est calculée ; ii. détermination d’une capacité résiduelle de la batterie rechargeable (12) pendant le processus de charge, de telle sorte ▪ qu’après avoir atteint une tension de batterie prédéfinie (UCT), le courant de charge (lC, ICH, ICL) est modifié pendant une courte période et la tension de batterie (UC, UC1, UC2) correspondante est mesurée, et ▪ qu’une impédance (Z) de la batterie de recharge (12) est calculée à partie du quotient de la différence entre les courants de charge (ICH - ICL) mesurés et entre les tensions de batterie (UC1 - UC2). L’invention concerne en outre un chargeur et une batterie rechargeable destinés à la mise en œuvre du procédé selon l’invention.
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