WO1997006445A1 - Display for the visual indication of the charge status of a rechargeable battery - Google Patents

Display for the visual indication of the charge status of a rechargeable battery Download PDF

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Publication number
WO1997006445A1
WO1997006445A1 PCT/EP1996/003463 EP9603463W WO9706445A1 WO 1997006445 A1 WO1997006445 A1 WO 1997006445A1 EP 9603463 W EP9603463 W EP 9603463W WO 9706445 A1 WO9706445 A1 WO 9706445A1
Authority
WO
WIPO (PCT)
Prior art keywords
display
battery
charge
capacity
rechargeable battery
Prior art date
Application number
PCT/EP1996/003463
Other languages
German (de)
French (fr)
Inventor
Gregor Wolf
Original Assignee
Wolf-Geräte Gmbh Vertriebsgesellschaft Kg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wolf-Geräte Gmbh Vertriebsgesellschaft Kg filed Critical Wolf-Geräte Gmbh Vertriebsgesellschaft Kg
Publication of WO1997006445A1 publication Critical patent/WO1997006445A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • 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]
    • G01R31/371—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with remote indication, e.g. on external chargers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • H02J7/0049—Detection of fully charged condition

Definitions

  • the invention relates to a display for the optical display of the state of charge of a rechargeable battery which is used to feed the drive motor of a lawnmower and to indicate the amount of electricity still available, which is proportional to the working time, by means of a plurality of light-emitting diodes or LCDs Display elements.
  • Optical display devices that make the state of charge of a rechargeable battery recognizable have become known in a wide variety of designs.
  • DE 41 10 777 AI describes a circuit arrangement for measuring and displaying the available capacity of an accumulator.
  • the currently available capacity of the battery can be read on a display.
  • the charging capacity can be repeated by the connected electrical device via a request signal with each charging process, so that the capacity quantity can be recalibrated manually by pressing a button or in a time-controlled manner.
  • a relatively precise display of the remaining capacity of the battery is possible even if the available charge capacity decreases as the age decreases.
  • the measured residual capacity value is shown on the display by a bar graph and digitally. A flashing signal display is not provided.
  • DE 40 14 737 C2 describes a method for determining the state of charge of a rechargeable electrical energy store.
  • the available parameters are processed in a microprocessor in a complex manner and displayed on a monitor.
  • Programs and data specific to the battery or device are stored on the system on a memory.
  • DE-G 89 11 531 describes an instrument for displaying the state of discharge of batteries.
  • an LCD module is arranged in the display panel, which has a plurality of elongated electrodes arranged one above the other for the level-like display of different running states. When the state of charge decreases, the individual electrodes are gradually switched off from top to bottom, the circuit being such that when the discharge limit is reached, beyond which discharge is undesirable, only the last electrode is switched on.
  • the invention has for its object to provide a simple and inexpensive display device, the user of a cordless lawn mower (or a similar garden tool) the information necessary for the work process clearly and clearly transmitted.
  • This display makes the operator of the lawnmower visually recognizable in an impressive manner the state of charge of the battery, and important information is also transmitted by the flashing elements.
  • the flashing symbol display element shows that the battery is being charged continuously and that the charging process is not interrupted by a power interruption or shutdown of the mains supplying the charger. This symbol display element is therefore only effective during the charging process by flashing and provides the user with important information.
  • Another important piece of information is provided to the user by the flashing of the last LCD display element, which informs the user that the battery is almost empty.
  • the transition to the flashing display is clear to the user recognizable, so that he can abort the work process in good time and protect the battery from deep discharge by charging the battery in good time.
  • An expedient embodiment of the display results from claim 2, according to which the symbol display element changes the display state when full charge is reached and emits a continuous flashing signal.
  • FIG. 1 An embodiment of a display for displaying the state of charge is described below with reference to the drawing.
  • the single figure of the drawing schematically shows such a display device with four display elements 1 - 4 and a symbol display element 5.
  • the displays corresponding to the specified operating states are shown in the lines one above the other.
  • the display elements can be light-emitting diodes or LCDs that light continuously or flash.
  • Line 1 illustrates the condition when fully charged. In the event of a charge drop, one display element goes out after the other, and when the battery is almost empty (line 5), the last display element 1 starts to flash. No display element is visible when the battery is empty (line 6).
  • a circuit arrangement assigned to the display measures the course of the current during the discharge and the charging current during the charging process. The total value of these current profiles is compared with the battery capacity and a corresponding number of display elements light up in each case.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

When displaying the charge status of a battery, it is not the nominal capacity of the battery which needs to be considered but the actual capacity available, i.e. the maximum amount of electricity which can actually be stored in the battery. The capacity, measured in ampere hours, decreases however due to ageing, as well as depending on how the battery was charged, and the invention therefore calls for the value taken as the capacity to be updated.

Description

Display zur optischen Anzeige des Ladezustands einer wiederaufladbaren Batterie Display for visual indication of the state of charge of a rechargeable battery
Die Erfindung bezieht sich auf ein Display zur optischen An¬ zeige des Ladezustands einer wiederaufladbaren Batterie, die zur Speisung des Antriebsmotors eines Rasenmähers dient und zur Anzeige der jeweils noch zur Verfügung stehenden, der Ar¬ beitszeit proportionalen, Elektrizitätsmenge, durch mehrere Leuchtdioden- oder LCD-Anzeigeelemente.The invention relates to a display for the optical display of the state of charge of a rechargeable battery which is used to feed the drive motor of a lawnmower and to indicate the amount of electricity still available, which is proportional to the working time, by means of a plurality of light-emitting diodes or LCDs Display elements.
Optische Anzeigevorrichtungen, die den Ladezustand einer auf¬ ladbaren Batterie erkennbar machen, sind in den verschieden¬ sten Ausführungen bekannt geworden. Die DE 41 10 777 AI be¬ schreibt eine Schaltungsanordnung zum Messen und Anzeigen der verfügbaren Kapazität eines Akkumulators. Auf einem Display kann die augenblicklich verfügbare Kapazität der Batterie abgelesen werden. Die Ladekapazität kann dabei durch das angeschlossene elektrische Gerät über ein Anforderungs¬ signal bei jedem Ladevorgang wiederholt werden, so daß manuell durch Tastendruck oder zeitgesteuert die Kapazitätsmenge neu kalibriert werden kann. Dadurch ist auch bei durch Alterung abnehmender verfügbarer Ladekapazität eine relativ genaue Anzeige der Restkapazität der Batterie möglich.Optical display devices that make the state of charge of a rechargeable battery recognizable have become known in a wide variety of designs. DE 41 10 777 AI describes a circuit arrangement for measuring and displaying the available capacity of an accumulator. The currently available capacity of the battery can be read on a display. The charging capacity can be repeated by the connected electrical device via a request signal with each charging process, so that the capacity quantity can be recalibrated manually by pressing a button or in a time-controlled manner. As a result, a relatively precise display of the remaining capacity of the battery is possible even if the available charge capacity decreases as the age decreases.
Der gemessene Restkapazitätswert wird auf dem Display durch eine Balkenanzeige und digital angezeigt. Eine Blinksignal¬ anzeige ist nicht vorgesehen.The measured residual capacity value is shown on the display by a bar graph and digitally. A flashing signal display is not provided.
Die DE 40 14 737 C2 beschreibt ein Verfahren zur Bestimmung des Ladezustands eines wiederaufladbaren elektrischen Ener¬ giespeichers. Hier werden in aufwendiger Weise die zur Verfügung stehenden Parameter in einem Mikroprozessor ver¬ arbeitet und auf einem Monitor dargestellt. Programme und für die Batterie bzw. das Gerät spezifische Daten werden auf einem Speicher auf das System gebracht. Das DE-G 89 11 531 beschreibt ein Instrument zur Anzeige des Entladezustands von Akkumulatoren. Dabei ist im Anzeigefeld ein LCD-Baustein angeordnet, der mehrere übereinander angeord¬ nete, längliche Elektroden aufweist, zur niveauartigen Anzeige unterschiedlicher Laufzustände. Bei Abnahme des Ladezustands werden die einzelnen Elektroden nach und nach von oben nach unten ausgeschaltet, wobei die Schaltung derart beschaffen ist, daß beim Erreichen der Entladegrenze, über die hinaus ein Ent¬ laden unerwünscht ist, nur noch die letzte Elektrode einge¬ schaltet ist.DE 40 14 737 C2 describes a method for determining the state of charge of a rechargeable electrical energy store. Here, the available parameters are processed in a microprocessor in a complex manner and displayed on a monitor. Programs and data specific to the battery or device are stored on the system on a memory. DE-G 89 11 531 describes an instrument for displaying the state of discharge of batteries. In this case, an LCD module is arranged in the display panel, which has a plurality of elongated electrodes arranged one above the other for the level-like display of different running states. When the state of charge decreases, the individual electrodes are gradually switched off from top to bottom, the circuit being such that when the discharge limit is reached, beyond which discharge is undesirable, only the last electrode is switched on.
Der Erfindung liegt die Aufgabe zugrunde, eine einfache und kostengünstige Anzeigevorrichtung zu schaffen, die den Benutzer eines Akku-Rasenmähers (oder eines ähnlichen Gartengeräts) die für den Arbeitsvorgang notwendigen Informationen anschau¬ lich und eindeutig übermittelt.The invention has for its object to provide a simple and inexpensive display device, the user of a cordless lawn mower (or a similar garden tool) the information necessary for the work process clearly and clearly transmitted.
Gelöst wird die gestellte Aufgabe durch die im Kennzeichnungs¬ teil des Anspruchs 1 angegebenen Merkmale.The stated object is achieved by the features specified in the characterizing part of claim 1.
Dieses Display macht der Bedienungsperson des Rasenmähers op¬ tisch in einprägsamer Weise den Ladezustand der Batterie erkennbar, und es werden zusätzlich durch die blinkenden Elemente wichtige Informationen übermittelt. Das blinkende Symbolanzeigeelement läßt erkennen, daß die Batterie konti¬ nuierlich aufgeladen wird, und daß der Ladevorgang nicht etwa durch eine Stromunterbrechung oder Abschaltung des das Lade¬ gerät speisenden Netzes unterbrochen ist. Dieses Symbolan- zeigeelement wird demgemäß nur während des Aufladevorgangs durch Blinken wirksam und liefert dem Benutzer eine wichtige Information.This display makes the operator of the lawnmower visually recognizable in an impressive manner the state of charge of the battery, and important information is also transmitted by the flashing elements. The flashing symbol display element shows that the battery is being charged continuously and that the charging process is not interrupted by a power interruption or shutdown of the mains supplying the charger. This symbol display element is therefore only effective during the charging process by flashing and provides the user with important information.
Eine weitere wichtige Information wird dem Benutzer durch das Blinken des letzten LCD-Anzeigeelements vermittelt, wodurch dem Benutzer mitgeteilt wird, daß die Batterie fast leer ist. Der Übergang in die Blinkanzeige ist dem Benutzer deutlich erkennbar, so daß er den Arbeitsvorgang rechtzeitig abbrechen und die Batterie vor einer Tiefentladung schützen kann, in¬ dem die Batterie rechtzeitig aufgeladen wird. Eine zweckmäßige Ausgestaltung des Displays ergibt sich aus Anspruch 2, wonach das Symbolanzeigeelement bei Erreichen der Voll-Ladung den Anzeigezustand ändert und ein Dauerblinksignal ausstrahlt.Another important piece of information is provided to the user by the flashing of the last LCD display element, which informs the user that the battery is almost empty. The transition to the flashing display is clear to the user recognizable, so that he can abort the work process in good time and protect the battery from deep discharge by charging the battery in good time. An expedient embodiment of the display results from claim 2, according to which the symbol display element changes the display state when full charge is reached and emits a continuous flashing signal.
Nachstehend wird ein Ausführungsbeispiel eines Displays zur Anzeige des Ladezustands anhand der Zeichnung beschrieben. Die einzige Figur der Zeichnung zeigt schematisch eine der¬ artige Anzeigevorrichtung mit vier Anzeigeelementen 1 - 4 und einem Symbolanzeigeelement 5. In der Zeichnung sind in den übereinandergefügten Zeilen jeweils die den angegebenen Betriebszuständen entsprechenden Anzeigen dargestellt. Die Anzeigeelemente können Leuchtdioden oder LCDs sein, die kontinuierlich leuchten oder blinken.An embodiment of a display for displaying the state of charge is described below with reference to the drawing. The single figure of the drawing schematically shows such a display device with four display elements 1 - 4 and a symbol display element 5. In the drawing, the displays corresponding to the specified operating states are shown in the lines one above the other. The display elements can be light-emitting diodes or LCDs that light continuously or flash.
Die Zeile 1 veranschaulicht den Zustand bei voller Ladung. Bei Ladungsabfall verlischt ein Anzeigeelement nach dem an¬ deren, und wenn die Batterie fast leer ist (Zeile 5), fängt das letzte Anzeigeelement 1 an zu blinken. Im leeren Zustand der Batterie (Zeile 6) ist kein Anzeigeelement sichtbar.Line 1 illustrates the condition when fully charged. In the event of a charge drop, one display element goes out after the other, and when the battery is almost empty (line 5), the last display element 1 starts to flash. No display element is visible when the battery is empty (line 6).
Bei der Aufladung (Zeile 2) wird ein Anzeigelement nach dem anderen zugeschaltet, wobei das Symbolanzeigeelement 5 blinkt. In der vollgeladenen Stellung gemäß Zeile 3 sind alle vier Anzeigeelemente sichtbar und das Symbolelement leuchtet dauernd.When charging (line 2), one display element after the other is switched on, the symbol display element 5 flashing. In the fully charged position according to line 3, all four display elements are visible and the symbol element lights up continuously.
Beim Schneiden des Grases (Zeile 4) geht ein Element nach dem anderen aus, wie hier angedeutet ist.When cutting the grass (line 4) one element after the other runs out, as indicated here.
Eine dem Display zugeordnete Schaltungsanordnung mißt den Ver¬ lauf des Stromes während der Entladung und den Ladestrom beim Aufladevorgang. Der Gesamtwert dieser Stromverläufe wird mit der Batteriekapazität verglichen, und es leuchtet jeweils eine entsprechende Zahl von Anzeigeelementen auf. A circuit arrangement assigned to the display measures the course of the current during the discharge and the charging current during the charging process. The total value of these current profiles is compared with the battery capacity and a corresponding number of display elements light up in each case.

Claims

P a t e n t a n s p r ü c h e : Patent claims:
1. Display zur optischen Anzeige des Ladezustandes einer wiederaufladbaren Batterie, die zur Speisung des Antriebs eines Rasenmähers dient und zur Anzeige der jeweils noch zur Verfügung stehenden, der Arbeitszeit proportionalen Elektrizitätsmenge durch mehrere Leuchtdioden- oder LCD- Anzeigeelemente, dadurch gekennzeichnet, daß vier nacheinander verlöschende (Entladung) bzw. nacheinander aufleuchtende (Ladung) Anzeige¬ elemente (1, 2, 3, 4) und ein blinkendes Statussymbol-Anzeige¬ element (5) vorgesehen sind, welch letzteres den Auflade- vorgang durch Blinken signalisiert, und daß das zuletzt ver¬ löschende Anzeigeelement (1) vor seinem, die völlig leere Batterie kennzeichnenden, Erlöschen blinkt.1. Display for the optical display of the state of charge of a rechargeable battery, which is used to power the drive of a lawnmower and to display the amount of electricity that is still available, proportional to the working time, by means of a plurality of light-emitting diodes or LCD display elements, characterized in that four successively extinguishing ones (Discharge) or successively illuminated (charge) display elements (1, 2, 3, 4) and a flashing status symbol display element (5) are provided, the latter of which signals the charging process by flashing, and that the last extinguishing display element (1) flashes before it goes out, which characterizes the completely empty battery.
2. Display nach Anspruch 1, dadurch gekennzeichnet, daß bei erreichter Volladung die Anzeigeelemente (1 - 4) und das Symbolanzeigeelement leuchten. 2. Display according to claim 1, characterized in that when full charge is reached, the display elements (1 - 4) and the symbol display element light up.
PCT/EP1996/003463 1995-08-10 1996-08-05 Display for the visual indication of the charge status of a rechargeable battery WO1997006445A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19529437.8 1995-08-10
DE19529437A DE19529437C1 (en) 1995-08-10 1995-08-10 Display for visual indication of the state of charge of a rechargeable battery

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100879515B1 (en) * 2006-11-09 2009-01-22 삼성전자주식회사 Method and apparatus for?displaying a charging status of battery in terminal

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8911531U1 (en) * 1989-09-28 1989-11-30 Landwehr Electronic Gmbh, 2000 Norderstedt, De
US5216371A (en) * 1989-06-12 1993-06-01 Ricoh Company, Ltd. Battery pack including measuring and indicating
US5293156A (en) * 1991-02-15 1994-03-08 Nitto Kohki Co., Ltd. Hand tool driven by DC battery with multiple level battery condition indicator
EP0600234A2 (en) * 1992-12-02 1994-06-08 Matsushita Electric Industrial Co., Ltd. System for displaying residual capacity of a battery

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4014737A1 (en) * 1989-05-12 1990-11-15 Fraunhofer Ges Forschung Physical value determn. for accumulator - measures process input values of energy storage which are processed in computer
DE4110777A1 (en) * 1991-03-28 1992-10-01 Bosch Gmbh Robert CIRCUIT ARRANGEMENT FOR MEASURING AND DISPLAYING THE AVAILABLE CAPACITY OF A ACCUMULATOR

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5216371A (en) * 1989-06-12 1993-06-01 Ricoh Company, Ltd. Battery pack including measuring and indicating
DE8911531U1 (en) * 1989-09-28 1989-11-30 Landwehr Electronic Gmbh, 2000 Norderstedt, De
US5293156A (en) * 1991-02-15 1994-03-08 Nitto Kohki Co., Ltd. Hand tool driven by DC battery with multiple level battery condition indicator
EP0600234A2 (en) * 1992-12-02 1994-06-08 Matsushita Electric Industrial Co., Ltd. System for displaying residual capacity of a battery

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Publication number Publication date
DE19529437C1 (en) 1997-04-03

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