EP1266725A1 - Electric power tool with rechargeable energy accumulator - Google Patents
Electric power tool with rechargeable energy accumulator Download PDFInfo
- Publication number
- EP1266725A1 EP1266725A1 EP01114544A EP01114544A EP1266725A1 EP 1266725 A1 EP1266725 A1 EP 1266725A1 EP 01114544 A EP01114544 A EP 01114544A EP 01114544 A EP01114544 A EP 01114544A EP 1266725 A1 EP1266725 A1 EP 1266725A1
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- EP
- European Patent Office
- Prior art keywords
- capacitors
- energy store
- tool according
- rechargeable
- tool
- Prior art date
- Legal status (The legal status 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 status listed.)
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- 239000003990 capacitor Substances 0.000 claims abstract description 36
- 229910005580 NiCd Inorganic materials 0.000 claims description 4
- 229910005813 NiMH Inorganic materials 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims 1
- 230000002459 sustained effect Effects 0.000 claims 1
- 238000004146 energy storage Methods 0.000 description 22
- 230000007423 decrease Effects 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 230000003797 telogen phase Effects 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/02—Construction of casings, bodies or handles
Definitions
- the invention relates to an electrically operated implement, especially a power tool like a drill, a screwdriver or the like. According to the preamble of the claim 1.
- Such tools also known as cordless screwdrivers, have an electric drive motor for driving a Tool holder in which the desired work tool is inserted.
- the drive motor is via a switch connectable to a rechargeable energy storage device, the the implement is held interchangeably.
- the energy storage - usually a battery pack - is used regularly by the working device charged separately in a charging station, which is usually the case Periods of 10 to 12 hours are necessary.
- Fast charging capability Energy stores have reduced charging times of 15 Minutes to 1 hour.
- Usual battery packs especially NiCd cells, have a permanent one Self-discharge, so that the capacity with increasing Storage time decreases. In the hobby area, this usually has the consequence that whenever the tool is to be used, the user must determine that the energy storage is discharged and must first be loaded for the work to be performed. As a result, there is usually no need to use the power tool A period of 15 minutes to 1 hour is possible.
- the invention has for its object an electrically operated Train the implement in such a way that even when empty Energy storage within the shortest possible time using the Working tool is possible.
- the main idea of the invention is to provide high performance Capacitors as quickly rechargeable energy storage, e.g. as To use the battery pack. Because capacitors with high in a short time Charging currents can be charged and are considerable after just a few seconds Have stored amount of energy with the working device work is started at short notice.
- the Capacitor performance is sufficient to perform several screwing operations. For example about five to ten screwing operations with the Energy storage from capacitors according to the invention properly be carried out before reloading is necessary. There this reloading is in the seconds range, is in the hobby area the interruption of work for a possible reloading readily acceptable.
- the hobby craftsman is given the opportunity, even after long rest phase of the power tool and the associated Short-term discharge of the cells of a battery pack Take up work without long charging phases of the battery pack must accept.
- capacitors are connected in parallel to each other, high peak currents possible, while continuous currents of 20 to 30 A can be achieved.
- a series connection of capacitors connected in parallel with a nominal voltage of The output voltage can be 2.3 to 2.5 V e.g. to 12 V or 24 V can be increased.
- the energy storage from capacitors is advantageous against an energy store made of rechargeable cells such as NiCd batteries, Li batteries, NiMH batteries can be used.
- the energy store from rechargeable cells and the energy storage from capacitors has the same geometry a connection, e.g. a contacting insert shoe.
- High-performance capacitors in addition to conventional battery cells in one Arrange housing and electrically connect such that first the capacitors and then the battery cells become.
- the capacitors can also be used during a break are charged via the battery cells.
- the energy storage devices made of rechargeable batteries are advantageous Cells and the energy storage from capacitors alternately to charge in a same charger. It can also be two Charging slots are provided so that during charging and Charging the energy storage from capacitors permanently Energy storage is charged from rechargeable cells. On this way, the charging period of the usually used Energy storage from rechargeable cells with the energy storage from capacitors are bridged.
- the capacitors In order to achieve a high power density, the capacitors with up to 30%, preferably with 20% above their nominal voltage charged. The stored amount of charge is increased.
- the electrically operated implement shown in Fig. 1 is a cordless screwdriver 1. It has an essentially pistol-like Basic shape with a handle 3 and one across Handle 3 lying housing 2, in which an electric drive motor 7 is arranged.
- the electric drive motor 7 expediently drives a tool holder 4 via a gear, the bit holder for tools in the embodiment shown 8 is.
- a switch 5 is provided in the housing of the handle 3, via which the electric motor 7 is releasably attached to the handle Energy storage 6 is to be connected.
- the energy store 6 consists of a housing that on its side facing the handle 3, a plug-in shoe 9 has in the free end 10 of the handle form-fitting is held in place. In the locking position shown in Fig. 1 is the energy storage 6 in the insert shoe 9 and arranged in the free end 10 of the handle 3 electrical contacts and connected to the drive motor 7 via the switch 5.
- Fig. 1 there are a large number in the housing of the energy store 6 of rechargeable cells 11 arranged as dashed lines shown. These individual cells 11 are electrically interconnected connected to a battery pack of the desired voltage and the desired performance.
- the cells 11 can stand upright in the housing of the energy store 6 be arranged, with its longitudinal axis 12 then approximately to Longitudinal axis of the handle 3 is aligned. Expediently also be a horizontal arrangement of the capacitors.
- the rechargeable cells can be NiCd cells, Li cells or be NiMH cells.
- Fig. 2 is in place of the energy store 6 in Fig. 1 or alternately for this an energy storage device 20 is provided, the housing 21 of which is the same Size as the housing of the energy storage 6 in Fig. 1.
- the housing 21 on its Handle 3 facing flat side on a plug-in shoe 9, in the free end 10 of the handle 3 while closing electrical Contacts can be snapped into place.
- the housing 21 the energy store 20 is thus captively fixed, but detachable held on the handle 3 of the implement 1.
- a capacitor can have an internal voltage from e.g. 2.3 V to 2.5 V can be charged, with a single capacitor has a capacitance of more than 50 farads having. 100 Farad is an advantageous size.
- a capacitor can have an internal voltage from e.g. 2.3 V to 2.5 V can be charged, with a single capacitor has a capacitance of more than 50 farads having. 100 Farad is an advantageous size.
- To achieve a continuous current capability of 20 to 30 A and preferably a peak load of up to 80 A are several in particular identical capacitors connected in parallel.
- the Capacitors 22 with a capacitance of more than 50 F are so dimensioned that they the electrical energy requirement of the drive motor 7 cover for several screw cycles.
- the design is made so that about five screwing cycles, preferably up to ten screw cycles with screws 5x40 mm in Softwood are possible. It is also used for operation a battery light possible, operating times of 5 minutes and more are reachable.
- the energy store 20 in less than 1 minute, preferably rechargeable within 10 to 30 seconds. This can be done in an adapted charger happen, expediently the Energy storage 6 from rechargeable cells 11 and Energy storage 20 from capacitors 22 preferably alternately can be charged in the same charger. It can be expedient to provide a charger with two charging slots, which are each electrically connected to the energy store to be charged 6 and 20 are adapted.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Die Erfindung betrifft ein Elektrowerkzeug wie einen Akkuschrauber, mit einem elektrischen Antriebsmotor (7) zum Antrieb eines Werkzeughalters (4). Der Antriebsmotor (7) ist über einen Schalter (5) mit einem wiederaufladbaren Energiespeicher (6) verbindbar, der an dem Arbeitsgerät (1) auswechselbar gehalten ist. Um für kurze Arbeitszyklen ohne lange Ladezeiten Energie zur Verfügung zu stellen, ist vorgesehen, daß der Energiespeicher (20) im wesentlichen ausschließlich aus miteinander gekoppelten Kondensatoren (22) besteht.The invention relates to an electric tool, such as a cordless screwdriver, with an electric drive motor (7) for driving a tool holder (4). The drive motor (7) can be connected via a switch (5) to a rechargeable energy store (6), which is held in an exchangeable manner on the working device (1). In order to provide energy for short work cycles without long charging times, it is provided that the energy store (20) consists essentially exclusively of capacitors (22) coupled to one another.
Description
Die Erfindung betrifft ein elektrisch betriebenes Arbeitsgerät, insbesondere ein Elektrowerkzeug wie eine Bohrmaschine, einen Schrauber oder dgl. nach dem Oberbegriff des Anspruchs 1.The invention relates to an electrically operated implement, especially a power tool like a drill, a screwdriver or the like. According to the preamble of the claim 1.
Derartige Arbeitsgeräte, auch als Akkuschrauber bekannt, weisen einen elektrischen Antriebsmotor zum Antrieb eines Werkzeughalters auf, in den das gewünschte Arbeitswerkzeug eingesteckt wird. Der Antriebsmotor ist über einen Schalter mit einem wiederaufladbaren Energiespeicher verbindbar, der an dem Arbeitsgerät auswechselbar gehalten ist. Der Energiespeicher - meist ein Akkupack - wird regelmäßig vom Arbeitsgerät getrennt in einer Ladestation aufgeladen, wozu meist Zeiträume von 10 bis 12 Stunden notwendig sind. Schnelladefähige Energiespeicher haben verkürzte Ladezeiten von 15 Minuten bis 1 Stunde.Such tools, also known as cordless screwdrivers, have an electric drive motor for driving a Tool holder in which the desired work tool is inserted. The drive motor is via a switch connectable to a rechargeable energy storage device, the the implement is held interchangeably. The energy storage - usually a battery pack - is used regularly by the working device charged separately in a charging station, which is usually the case Periods of 10 to 12 hours are necessary. Fast charging capability Energy stores have reduced charging times of 15 Minutes to 1 hour.
Übliche Akkupacks, insbesondere NiCd-Zellen haben eine permanente Selbstentladung, so daß die Kapazität mit zunehmender Lagerzeit sinkt. Dies hat im Hobbybereich meist zur Folge, daß immer dann, wenn das Werkzeug benutzt werden soll, der Benutzer feststellen muß, daß der Energiespeicher entladen ist und für die auszuführende Arbeit zunächst geladen werden muß. Dadurch ist ein Einsatz des Elektrowerkzeugs meist nicht vor Ablauf einer Zeitspanne von 15 Minuten bis 1 Stunde möglich.Usual battery packs, especially NiCd cells, have a permanent one Self-discharge, so that the capacity with increasing Storage time decreases. In the hobby area, this usually has the consequence that whenever the tool is to be used, the user must determine that the energy storage is discharged and must first be loaded for the work to be performed. As a result, there is usually no need to use the power tool A period of 15 minutes to 1 hour is possible.
Der Erfindung liegt die Aufgabe zugrunde, ein elektrisch betriebenes Arbeitsgerät derart auszubilden, daß auch bei leerem Energiespeicher innerhalb kürzester Zeit der Einsatz des Arbeitswerkzeuges möglich ist.The invention has for its object an electrically operated Train the implement in such a way that even when empty Energy storage within the shortest possible time using the Working tool is possible.
Die Aufgabe wird erfindungsgemäß nach den kennzeichnenden Merkmalen des Anspruchs 1 gelöst.The task is inventively according to the characteristic Features of claim 1 solved.
Der Kerngedanke der Erfindung liegt darin, hochleistungsfähige Kondensatoren als rasch aufladbaren Energiespeicher, z.B. als Akkupack zu nutzen. Da Kondensatoren in kurzer Zeit mit hohen Ladeströmen aufladbar sind und bereits nach Sekunden eine erhebliche Energiemenge gespeichert haben, kann mit dem Arbeitsgerät kurzfristig die Arbeit aufgenommen werden. Die Leistungsfähigkeit der Kondensatoren ist ausreichend, um mehrere Schraubvorgänge auszuführen. So können zum Beispiel ohne weiteres etwa fünf bis zehn Schraubvorgänge mit dem erfindungsgemäßen Energiespeicher aus Kondensatoren ordnungsgemäß ausgeführt werden, bevor ein Nachladen nötig ist. Da dieses Nachladen im Sekundenbereich liegt, ist im Hobbybereich die Unterbrechung der Arbeit für ein eventuelles Nachladen ohne weiteres akzeptabel.The main idea of the invention is to provide high performance Capacitors as quickly rechargeable energy storage, e.g. as To use the battery pack. Because capacitors with high in a short time Charging currents can be charged and are considerable after just a few seconds Have stored amount of energy with the working device work is started at short notice. The Capacitor performance is sufficient to perform several screwing operations. For example about five to ten screwing operations with the Energy storage from capacitors according to the invention properly be carried out before reloading is necessary. There this reloading is in the seconds range, is in the hobby area the interruption of work for a possible reloading readily acceptable.
Mit dem erfindungsgemäßen Energiespeicher aus Kondensatoren ist dem Hobbyhandwerker die Möglichkeit gegeben, auch nach langer Ruhephase des Elektrowerkzeuges und der damit einhergehenden Entladung der Zellen eines Akkupacks kurzfristig eine Arbeit aufzunehmen, ohne daß er lange Ladephasen des Akkupacks hinnehmen muß.With the energy storage device according to the invention made of capacitors the hobby craftsman is given the opportunity, even after long rest phase of the power tool and the associated Short-term discharge of the cells of a battery pack Take up work without long charging phases of the battery pack must accept.
Werden die Kondensatoren zueinander parallel geschaltet, sind hohe Spitzenströme möglich, wobei gleichzeitig Dauerströme von 20 bis 30 A zu erzielen sind. Durch eine Reihenschaltung von parallel geschalteten Kondensatoren mit einer Nennspannung von 2,3 bis 2,5 V kann die Ausgangsspannung z.B. auf 12 V oder 24 V erhöht werden.If the capacitors are connected in parallel to each other, high peak currents possible, while continuous currents of 20 to 30 A can be achieved. Through a series connection of capacitors connected in parallel with a nominal voltage of The output voltage can be 2.3 to 2.5 V e.g. to 12 V or 24 V can be increased.
Vorteilhaft ist der Energiespeicher aus Kondensatoren alternativ gegen einen Energiespeicher aus wiederaufladbaren Zellen wie NiCd-Akkus, Li-Akkus, NiMH-Akkus einsetzbar. Hierzu hat zweckmäßig der Energiespeicher aus wiederaufladbaren Zellen und der Energiespeicher aus Kondensatoren die gleiche Geometrie eines Anschlusses, so z.B. eines kontaktierenden Einsteckschuhs.Alternatively, the energy storage from capacitors is advantageous against an energy store made of rechargeable cells such as NiCd batteries, Li batteries, NiMH batteries can be used. To do this expediently the energy store from rechargeable cells and the energy storage from capacitors has the same geometry a connection, e.g. a contacting insert shoe.
Es kann in Weiterbildung der Erfindung auch zweckmäßig sein, Hochleistungskondensatoren neben üblichen Akkuzellen in einem Gehäuse anzuordnen und elektrisch derart zu verschalten, daß zunächst die Kondensatoren und dann die Akkuzellen genutzt werden. In einer Betriebspause können die Kondensatoren auch über die Akkuzellen geladen werden.In a further development of the invention, it can also be expedient High-performance capacitors in addition to conventional battery cells in one Arrange housing and electrically connect such that first the capacitors and then the battery cells become. The capacitors can also be used during a break are charged via the battery cells.
Vorteilhaft sind der Energiespeicher aus wiederaufladbaren Zellen und der Energiespeicher aus Kondensatoren wechselweise in einem gleichen Aufladegerät zu laden. Es können auch zwei Ladeschächte vorgesehen sein, so daß während dem Aufladen und Laden des Energiespeichers aus Kondensatoren permanent der Energiespeicher aus wiederaufladbaren Zellen geladen wird. Auf diese Weise kann auch der Ladezeitraum des üblicherweise eingesetzten Energiespeichers aus wiederaufladbaren Zellen mit dem Energiespeicher aus Kondensatoren überbrückt werden.The energy storage devices made of rechargeable batteries are advantageous Cells and the energy storage from capacitors alternately to charge in a same charger. It can also be two Charging slots are provided so that during charging and Charging the energy storage from capacitors permanently Energy storage is charged from rechargeable cells. On this way, the charging period of the usually used Energy storage from rechargeable cells with the energy storage from capacitors are bridged.
Um eine hohe Leistungsdichte zu erzielen, werden die Kondensatoren mit bis zu 30%, vorzugsweise mit 20% über ihre Nennspannung aufgeladen. Die gespeicherte Ladungsmenge wird so erhöht.In order to achieve a high power density, the capacitors with up to 30%, preferably with 20% above their nominal voltage charged. The stored amount of charge is increased.
Weitere Merkmale der Erfindung ergeben sich aus der Beschreibung und der Zeichnung, in der nachfolgend ein im einzelnen beschriebenes Ausführungsbeispiel der Erfindung dargestellt ist. Es zeigen:
- Fig. 1
- in perspektivischer Ansicht ein elektrisch betriebenes Arbeitsgerät mit einem Energiespeicher aus wiederaufladbaren Zellen,
- Fig. 2
- eine perspektivische Ansicht eines Energiespeichers aus Kondensatoren.
- Fig. 1
- a perspective view of an electrically operated implement with an energy store made of rechargeable cells,
- Fig. 2
- a perspective view of an energy storage from capacitors.
Das in Fig. 1 dargestellte elektrisch betriebene Arbeitsgerät
ist ein Akkuschrauber 1. Er hat eine im wesentlichen pistolenartige
Grundform mit einem Handgriff 3 und einem quer zum
Handgriff 3 liegenden Gehäuse 2, in dem ein elektrischer Antriebsmotor
7 angeordnet ist. Der elektrische Antriebsmotor 7
treibt zweckmäßig über ein Getriebe einen Werkzeughalter 4 an,
der im gezeigten Ausführungsbeispiel ein Bithalter für Werkzeuge
8 ist.The electrically operated implement shown in Fig. 1
is a cordless screwdriver 1. It has an essentially pistol-like
Basic shape with a
Im Gehäuse des Handgriffs 3 ist ein Schalter 5 vorgesehen,
über den der Elektromotor 7 mit einem am Handgriff lösbar befestigten
Energiespeicher 6 zu verbinden ist. A
Der Energiespeicher 6 besteht aus einem Gehäuse, das auf
seiner dem Griff 3 zugewandten Seite einen Einsteckschuh 9
aufweist, in den das freie Ende 10 des Griffes formschlüssig
gehalten einrastbar ist. In der in Fig. 1 gezeigten Raststellung
ist der Energiespeicher 6 über im Einsteckschuh 9 und
im freien Ende 10 des Griffes 3 angeordnete elektrische Kontakte
und über den Schalter 5 mit dem Antriebsmotor 7 verbunden.The
In Fig. 1 sind im Gehäuse des Energiespeichers 6 eine Vielzahl
von wiederaufladbaren Zellen 11 angeordnet, wie gestrichelt
dargestellt. Diese Einzelzellen 11 werden elektrisch miteinander
verschaltet, um einen Akkupack der gewünschten Spannung
und der gewünschten Leistungsfähigkeit zu erhalten. Die Zellen
11 können dabei stehend im Gehäuse des Energiespeichers 6
angeordnet werden, wobei ihre Längsachse 12 dann etwa zur
Längsachse des Griffes 3 ausgerichtet liegt. Zweckmäßig kann
auch eine liegende Anordnung der Kondensatoren sein.In Fig. 1 there are a large number in the housing of the
Die wiederaufladbaren Zellen können NiCd-Zellen, Li-Zellen
oder NiMH-Zellen sein. Wie in Fig. 2 gezeigt, ist an Stelle
des Energiespeichers 6 in Fig. 1 oder wechselweise für diesen
ein Energiespeicher 20 vorgesehen, dessen Gehäuse 21 gleiche
Baugröße aufweist, wie das Gehäuse des Energiespeichers 6 in
Fig. 1. In gleicher Weise weist das Gehäuse 21 auf seiner dem
Griff 3 zugewandten Flachseite einen Einsteckschuh 9 auf, in
den das freie Ende 10 des Griffes 3 unter Schließen elektrischer
Kontakte formschlüssig einrastbar ist. Das Gehäuse 21
des Energiespeichers 20 ist somit unverlierbar fest, aber lösbar
am Handgriff 3 des Arbeitsgerätes 1 gehalten. The rechargeable cells can be NiCd cells, Li cells
or be NiMH cells. As shown in Fig. 2 is in place
of the
Der Energiespeicher 20 nach Fig. 2 besteht aus im Gehäuse 21
angeordneten Kondensatoren 22, die in geeigneter Weise miteinander
gekoppelt sind. Ein Kondensator kann auf eine Eigenspannung
von z.B. 2,3 V bis 2,5 V aufgeladen werden, wobei ein
einzelner Kondensator eine Kapazität von mehr als 50 Farad
aufweist. 100 Farad ist eine vorteilhafte Größe. Zur Erzielung
einer Dauerstromfähigkeit von 20 bis 30 A sowie vorzugsweise
einer Spitzenlast von bis zu 80 A sind mehrere insbesondere
baugleiche Kondensatoren zueinander parallel geschaltet. Die
Kondensatoren 22 mit einer Kapazität von mehr als 50 F sind so
bemessen, daß sie den elektrischen Energiebedarf des Antriebsmotors
7 für mehrere Schraubzyklen decken. Vorzugsweise ist
die Auslegung so getroffen, daß etwa fünf Schraubzyklen, vorzugsweise
bis zu zehn Schraubzyklen mit Schrauben 5x40 mm in
Weichholz möglich sind. Auch ist eine Nutzung zum Betrieb
einer Akkuleuchte möglich, wobei Betriebszeiten von 5 Minuten
und mehr erreichbar sind.2 consists of in the
Aufgrund der technischen Eigenschaften der Kondensatoren 22
ist der Energiespeicher 20 in weniger als 1 Minute, vorzugsweise
innerhalb von 10 bis 30 Sekunden aufladbar. Dies kann in
einem angepaßten Ladegerät geschehen, wobei zweckmäßig der
Energiespeicher 6 aus wiederaufladbaren Zellen 11 und der
Energiespeicher 20 aus Kondensatoren 22 vorzugsweise wechselweise
in einem gleichen Aufladegerät zu laden sind. Es kann
zweckmäßig sein, ein Ladegerät mit zwei Ladeschächten vorzusehen,
welche jeweils elektrisch an den zu ladenden Energiespeicher
6 bzw. 20 angepaßt sind.Due to the technical characteristics of the
Claims (10)
dadurch gekennzeichnet, daß der Energiespeicher (20) im wesentlichen ausschließlich aus miteinander gekoppelten Kondensatoren (22) besteht.Electrically operated implement, in particular a power tool such as a drill, screwdriver or the like, with an electric drive motor (7) for driving a tool holder (4), the drive motor (7) via a switch (5) having a rechargeable energy store (6, 20) connectable, which is held interchangeably on the implement (1),
characterized in that the energy store (20) consists essentially of interconnected capacitors (22).
dadurch gekennzeichnet, daß die vorzugsweise baugleich ausgeführten Kondensatoren (22) zueinander in Reihe und/oder parallel geschaltet sind.Tool according to claim 1,
characterized in that the capacitors (22) , which are preferably of identical construction, are connected in series and / or in parallel with one another.
dadurch gekennzeichnet, daß die Kondensatoren eine Kapazität von mehr als 50 F haben.Tool according to claim 1 or 2,
characterized in that the capacitors have a capacitance of more than 50 F.
dadurch gekennzeichnet, daß der Energiespeicher (20) aus Kondensatoren (22) in einem Bereich von etwa 20 bis 30 A dauerlastfähig ist und eine Spitzenlastfähigkeit von 80 A aufweist. Tool according to one of claims 1 to 3,
characterized in that the energy store (20) from capacitors (22) is capable of sustained load in a range of approximately 20 to 30 A and has a peak load capacity of 80 A.
dadurch gekennzeichnet, daß der Energiespeicher (20) aus Kondensatoren (22) in weniger als 1 Minute, vorzugsweise innerhalb von 10 bis 30 Sekunden aufladbar ist.Tool according to one of claims 1 to 4,
characterized in that the energy store (20) from capacitors (22) can be charged in less than 1 minute, preferably within 10 to 30 seconds.
dadurch gekennzeichnet, daß der Energiespeicher (20) aus Kondensatoren (22) alternativ gegen einen Energiespeicher (6) aus wiederaufladbaren Zellen wie NiCd-Akkus, Li-Akkus, NiMH-Akkus oder dgl. austauschbar ist.Tool according to one of claims 1 to 5,
characterized in that the energy store (20) made of capacitors (22) is alternatively interchangeable with an energy store (6) made of rechargeable cells such as NiCd batteries, Li batteries, NiMH batteries or the like.
dadurch gekennzeichnet, daß der Energiespeicher (20) aus Kondensatoren (22) parallel zu einem Energiespeicher (6) aus wiederaufladbaren Zellen geschaltet ist.Tool according to one of claims 1 to 5,
characterized in that the energy store (20) made of capacitors (22) is connected in parallel to an energy store (6) made of rechargeable cells.
dadurch gekennzeichnet, daß der Energiespeicher (6) aus wiederaufladbaren Zellen (11) und der Energiespeicher (20) aus Kondensatoren (22) etwa gleiche Anschlußgeometrie des Einsteckschuhs haben.Tool according to one of claims 1 to 7,
characterized in that the energy store (6) made of rechargeable cells (11) and the energy store (20) made of capacitors (22) have approximately the same connection geometry of the insert shoe.
dadurch gekennzeichnet, daß der Energiespeicher (6) aus wiederaufladbaren Zellen (11) und der Energiespeicher (20) aus Kondensatoren (22) vorzugsweise wechselweise in einem gleichen Aufladegerät zu laden sind.Tool according to one of claims 1 to 8,
characterized in that the energy store (6) from rechargeable cells (11) and the energy store (20) from capacitors (22) are preferably to be charged alternately in the same charger.
dadurch gekennzeichnet, daß die Kondensatoren mit bis zu 30% über ihre Nennspannung, vorzugsweise mit etwa 20% über ihre Nennspannung aufladbar sind.Tool according to one of claims 1 to 9,
characterized in that the capacitors can be charged with up to 30% above their nominal voltage, preferably with about 20% above their nominal voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP01114544A EP1266725A1 (en) | 2001-06-16 | 2001-06-16 | Electric power tool with rechargeable energy accumulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP01114544A EP1266725A1 (en) | 2001-06-16 | 2001-06-16 | Electric power tool with rechargeable energy accumulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1266725A1 true EP1266725A1 (en) | 2002-12-18 |
Family
ID=8177735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01114544A Withdrawn EP1266725A1 (en) | 2001-06-16 | 2001-06-16 | Electric power tool with rechargeable energy accumulator |
Country Status (1)
| Country | Link |
|---|---|
| EP (1) | EP1266725A1 (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005039829A1 (en) * | 2003-09-29 | 2005-05-06 | Robert Bosch Gmbh | Battery-driven screwdriver |
| WO2005039833A1 (en) * | 2003-09-29 | 2005-05-06 | Robert Bosch Gmbh | Battery-driven screwdriver |
| GB2420029A (en) * | 2003-11-19 | 2006-05-10 | Milwaukee Electric Tool Corp | Battery pack for a cordless power tool |
| WO2006081894A1 (en) * | 2005-02-07 | 2006-08-10 | Robert Bosch Gmbh | Electric hand tool |
| GB2434704A (en) * | 2002-11-22 | 2007-08-01 | Milwaukee Electric Tool Corp | Battery pack for a cordless power tool |
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