CN114552692A - Energy supply device and system comprising same - Google Patents

Energy supply device and system comprising same Download PDF

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Publication number
CN114552692A
CN114552692A CN202111360012.1A CN202111360012A CN114552692A CN 114552692 A CN114552692 A CN 114552692A CN 202111360012 A CN202111360012 A CN 202111360012A CN 114552692 A CN114552692 A CN 114552692A
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CN
China
Prior art keywords
energy supply
supply device
voltage
battery pack
housings
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.)
Pending
Application number
CN202111360012.1A
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Chinese (zh)
Inventor
A·奥斯瓦尔德
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
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Robert Bosch GmbH
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Filing date
Publication date
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Publication of CN114552692A publication Critical patent/CN114552692A/en
Pending legal-status Critical Current

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    • 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
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • H02J7/0045—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction concerning the insertion or the connection of the batteries
    • 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
    • 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
    • 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
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • 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
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input

Abstract

An energy supply device (10) for a battery-operated electrical device (14) or a replacement battery pack adapter (16) has at least two electromechanical interfaces (12) for a replacement battery pack, respectively, wherein the energy supply device converts an input alternating voltage into output direct voltages which are suitable for the at least two electromechanical interfaces, respectively. It is proposed that the energy supply device has at least two mechanically separate and electrically connected housings (18, 20) each having an electromechanical interface (22), the electromechanical interfaces of the housings each being engageable with one of the at least two electromechanical interfaces. A system comprising at least one battery-operated electric device and/or a replaceable battery pack adapter and an energy supply device, the electric device or the replaceable battery pack adapter for supplying energy to the electric device having at least two electromechanical interfaces for a housing of the energy supply device.

Description

Energy supply device and system having the same
Technical Field
The invention relates to an energy supply device for a battery-operated electric device or a replaceable battery pack adapter and to a system comprising at least one battery-operated electric device and/or a replaceable battery pack adapter and an energy supply device.
Background
Electrically operated devices which can be operated with the aid of a replacement battery pack are available at very different power levels depending on the application in which they are installed. There are, for example, low-power-class hand-held power tools and garden and household appliances which operate at 10.8V (nominally generally 12V) or 14.4V, while at medium to higher power classes mainly electric appliances of voltage classes 18V, 36V, 54V or also 72V are used. The voltage values are generated by the interconnection (parallel or series connection) of the battery cells used in the replacement battery pack. The battery cell is preferably designed here as a lithium-based battery cell (for example, lithium-ion, lithium polymer, lithium metal or the like) with a cell voltage of 3.6V, wherein the battery cell is typically a cylindrical round cell, the cell poles of which are arranged at the ends of the cylindrical shape. However, the following invention is not dependent on the type and design of the battery unit, but can be used for any electric device that can be operated with a replaceable battery pack.
DE 19963450B 4 and US 6, 495, 932B 1 each show a current supply device for a battery-operated power tool for converting an input alternating voltage into an output direct voltage and for feeding the output direct voltage to the power tool. For this purpose, the current supply device has a transformer and a rectifier in a first housing, which are electrically connected by a cable to a second housing, which is designed as an adapter, for coupling to the power tool via an electromechanical interface. The adapter and the electromechanical interface of the power tool are configured such that they are compatible with the respective replacement battery pack.
DE 202017105258U 1 shows the use of replacement batteries of different power or voltage classes on battery-operated power tools, wherein a replacement battery adapter is used which interconnects a plurality of replacement batteries of lower voltage classes in such a way that they can be operated on the power tool at integer multiples of the lower voltage classes. In this way, for example, two 18V replacement battery packs can be connected in series to an operating voltage of 36V.
Instead of a replacement battery pack adapter for a plurality of replacement battery packs of lower power or voltage classes, it is alternatively also possible to provide: the replacement battery packs are operated directly at a plurality of corresponding electromechanical interfaces of the electrical device, so that they can be operated at a lower power or at integer multiples of the voltage class. Alternatively, it is also conceivable for the electrically operated device to continue to operate at 18V but at a doubled current or at a doubled operating time.
Disclosure of Invention
The object of the present invention is to provide an energy supply device for a battery-operated electric device or a replaceable battery pack adapter, which offers the following possibilities: the battery-operated electric device operates without time limitation by means of at least two electromechanical interfaces provided for the respective battery pack replacement to input an alternating voltage, in particular a mains voltage, so that the manual handling of the user is improved over the prior art.
To solve the proposed task, it proposes: the energy supply device has at least two housings which are mechanically separated from one another and electrically connected to one another and each have an electromechanical interface, wherein the electromechanical interfaces of the housings can be brought into engagement with one of the at least two electromechanical interfaces of the battery-operated electrical device or the replacement battery pack adapter. In this way, it is particularly advantageously achieved that the long cable connections required hitherto between the respective housings of the energy supply device are significantly shortened or replaced by different electrical connections and improved hand handling is achieved, so that housings for the energy supply device which are to be disconnected from the electrical device or the replacement battery pack adapter and are to be separately arranged are no longer necessary. In the case of a simultaneous, clearly improved manual handling of the electric device, a high supply energy can therefore be provided by the energy supply device.
In the context of the present invention, a battery-operated electric machine is understood to be an electric tool, for example, for machining workpieces by means of an electrically driven insertion tool. The electric tool can be designed both as a hand-held electric tool and as a stationary electric machine tool. In this case, typical power tools are hand-held or vertical drills, screwdrivers, percussion drills, electric hammers, plane knives, angle grinders, vibratory finishing machines, polishing machines, circular saws, bench saws, cutting saws, and jigsaw saws or the like. However, as battery-operated electric devices, measuring devices such as distance meters, laser level aids, etc., or gardening devices such as lawn mowers, lawn trimmers, pruning saws or the like can also be envisaged. Furthermore, the invention can also be used in conjunction with an electromechanical interchangeable battery pack interface of a battery-operated household appliance (e.g. vacuum cleaner, mixer, etc.).
In a similar manner to the replacement battery pack, the respective housing of the energy supply device can be detachably connected to the battery-operated electric device or the replacement battery pack adapter by means of a correspondingly designed electromechanical interface in a force-locking and/or form-locking manner. A "releasable connection" is to be understood to mean, in particular, a connection which can be released and established without tools, i.e. by hand.
Further, it is to be noted that: the design of the electromechanical interface of the electrical device or the exchangeable battery pack adapter and the associated receptacle for the non-positive and/or positive-locking releasable connection of the housing of the energy supply device of different voltage classes are not the subject of the present invention. In general, the electromechanical interfaces of a voltage-class energy supply device or a replacement battery pack are configured such that they are compatible only with the corresponding interfaces of a battery-operated electric device or a replacement battery pack adapter of the same voltage or power class. The person skilled in the art selects a suitable embodiment for the interface depending on the power or voltage class of the battery-operated electric device and/or the replacement battery pack adapter or the replacement battery pack. Thus, the embodiments shown in some of the embodiments are to be understood only as exemplary.
In a further embodiment of the invention, provision is made for: the electrical connection between the housings is realized as a short cable connection, a plug connection or a slide connection. In this way, depending on the distance between the electromechanical interfaces and/or their arrangement on the electric device or on the replacement battery pack adapter, an electrical connection between the housings of the energy supply device can be made with simultaneous optimized hand actuation. For example, cable connections of approximately 10 to 15cm length between the individual housings can be envisaged. The mounting of the individual housings on the electrical device or on the replacement battery pack adapter can also be facilitated if the electromechanical interfaces of the electrical device or of the replacement battery pack adapter are arranged, for example, closely parallel side by side, so that the two housings can be coupled electromechanically by means of a plug connection or a sliding connection before being pushed into the corresponding electromechanical interfaces of the electrical device in order then to push them together.
Furthermore, the following steps are set: a first of the housings of the energy supply device has an input stage for rectifying and/or correcting the power factor of the input alternating voltage to a rectified intermediate circuit voltage (for example 400V), wherein an electrical connection switches the rectified intermediate circuit voltage circuit on (durchsleifen) to the further housing. At least the first housing has a supply cable for supplying an input alternating voltage, in particular a mains voltage, and at least one of the further housings of the energy supply device contains a dc voltage converter which converts the rectified intermediate circuit voltage into an output dc voltage (for example 18V or 36V) which is suitable for the electromechanical interface of the battery-operated electrical device.
In a further embodiment of the invention, the dc voltage converter of the at least one further housing is galvanically isolated. By means of this dc separation of the individual housings, the individual potentials are separated from one another in a manner similar to the use of a replacement battery pack. In this way, disturbances (for example common-mode disturbances or compensation currents) can be avoided. Furthermore, safety in the use of the energy supply device is increased by separating the touchable part from the input alternating voltage, in particular the supply voltage.
In order to also provide the output dc voltage generated in the at least one further housing for supplying the electrical device at the electromechanical interface of the first housing with the input stage, the electrical connection between the at least one further housing and the first housing is also used for electrically connecting the converted output dc voltage.
In an alternative embodiment of the invention, each housing of the energy supply device has an input stage for rectifying and/or correcting the power factor of the input alternating voltage, in particular the mains voltage, to a rectified intermediate circuit voltage, and a dc voltage converter for converting the rectified intermediate circuit voltage into an output dc voltage which is suitable for the electromechanical interface of the battery-operated electrical device. In this case, one of the housings is provided with a supply cable for supplying an input alternating voltage, in particular a mains voltage, which is electrically connected between the housings by an electrical connection in the form of a cable, plug or slide connection. It is advantageously possible to implement an energy supply system with a redundant single housing, so that a failure of a single input stage does not lead to the entire energy supply system being shut down, but rather the electric system can also continue to operate at reduced power if necessary.
Furthermore, it is possible to provide: the dc voltage converter according to the alternative embodiment is potential-isolated in each housing in order to separate the potentials of the individual housings from one another, similar to the application of the replacement battery pack. In this way, disturbances (for example common-mode disturbances or compensation currents) can be avoided. Furthermore, safety is increased when using the energy supply device by separating the touchable part from the mains voltage.
In order to be able to operate the electrical device, if necessary, also for a short time independently of the input alternating voltage, in particular the mains voltage, an additional energy store, in particular a supercapacitor, is integrated in at least one of the housings. This provides the required output dc voltage through the electromechanical interface of the housing. It is also possible to envisage: the output dc voltage of the additional energy store is connected to the electrical device or to another electromechanical interface of the replacement battery pack adapter via an electrical connection between the housings of the energy supply device. Furthermore, if the electric machine requires a high pulse current value (for example in the case of high torques which are required for a short time), such an additional energy store can also be used to provide the high pulse current value.
The invention also relates to a system comprising at least one battery-operated electric device and/or a replacement battery pack adapter and an energy supply device according to the invention, wherein the battery-operated electric device or the replacement battery pack adapter for supplying energy to the electric device has at least two electromechanical interfaces for a housing of the energy supply device.
Drawings
The invention is explained below by way of example with reference to fig. 1 to 3, wherein identical reference numerals in the figures denote identical components having the same functional principle.
It shows
FIG. 1: a schematic illustration of an energy supply device according to the invention, with two housings which are pushed into the electromechanical interface of an electrodynamic device or an alternating voltage adapter,
FIG. 2: a schematic illustration of an electric device configured as an electric hammer, with an energy supply device according to the invention,
FIG. 3: a schematic illustration of an electrically operated device configured as a dicing saw and/or a mitre saw, which has an energy supply device according to the invention, and
FIG. 4: a schematic illustration of an electrically operated device designed as a drilling machine, which is supplied with the energy supply device according to the invention by means of an alternating voltage adapter.
Detailed Description
Fig. 1 shows a first exemplary embodiment of an energy supply device 10 according to the invention, which has two housings 18, 20 that are inserted into an electromechanical interface 12 of a battery-operated electrical device 14 or a replacement battery pack adapter 16 (see fig. 2 to 4 for this purpose). The electromechanical interface 12 of the battery-operated electrical device 14 or the replacement battery pack adapter 16 is usually provided for receiving a corresponding replacement battery pack (not shown) for the energy supply of the electrical device 14. In this regard, the two housings 18, 20 also have corresponding electromechanical interfaces 22 which correspond to the electromechanical interfaces 12 of the electrical device 14 or the replacement battery pack adapter 16, with the interfaces 12, 22 being able to be engaged by means of the electromechanical interfaces 22 in a force-locking and/or form-locking manner in each case. A "releasable connection" is to be understood here to mean, in particular, a connection which can be released and established without tools, i.e. by hand. The releasable connection of each housing 18, 20 can additionally be locked against unintentional release by means of a mechanical locking device 24. The locking device 24 has a spring-loaded push button 26 which is operatively connected to a locking element 28 (see fig. 4) of the housing 18, 20 of the energy supply device 10. Due to the elasticity of the push button 26 and/or the locking element 28, the locking device 26 automatically snaps into a corresponding holding device 30 of the electromechanical interface 12 of the battery-operated electrical device 14 or the replacement battery pack adapter 16 when the housing 18, 20 is pushed in. If the operator presses the push button 26 in the push-in direction E, the lock is released and the operator can remove or push the housing 18, 20 of the electrical device 10 out of the battery-operated electrical device 14 or the replacement battery pack adapter 16 opposite the push-in direction E.
As already mentioned above, the configuration of the electromechanical interfaces 12, 22 depends in particular on the power or voltage class of the electric device 14, of the associated replacement battery pack or of the energy supply device 10. The power or voltage level is also typically manufacturer-specific, so that this is not discussed further here. The different configuration possibilities of the electromechanical interface are well known to the person skilled in the art. They have only a minor significance for the invention itself.
The energy supply device 10 inputs an alternating voltage UACPreferably the grid voltage, is converted in each case into an output dc voltage U suitable for the electromechanical interface 12 of the battery-operated electrical device 14DCThe output dc voltage is supplied to the electrically powered device 14 for operation thereof. To use an input alternating voltage UACFor the energy supply device 10, the first housing 18 of the two housings 18, 20 has a supply cable 32 which, in the embodiment shown, is provided at one end with a power plug 34 for a socket, not shown in greater detail, in particular a wall socket. In the case of mains supply, an alternating voltage U is inputACThe system is designed as a network voltage with a national or regional alternating voltage value (for example 230V or 110V).
The first housing 18 of the energy supply device 10 is mechanically separated from the second housing 20 and is electrically connected by means of an electrical connection 38, which is embodied, for example, as a cable connection 36. For example, a cable connection 36 of approximately 10 to 15cm in length between the individual housings 18, 20 can be envisaged. In this way, an optimized manual operation of the electrical device 14 can be achieved depending on the distance between the electromechanical interfaces 12 and/or their arrangement on the electrical device 14 or on the replacement battery pack adapter 16. Instead of the cable connection 36, a plug connection or a slide connection, which is not shown in greater detail, can also be envisaged as the electrical connection 38 (see fig. 3). In this case, the housings 18 and 20 each have a laterally arranged and mutually complementary connecting device in the form of a correspondingly configured electromechanical interface. The person skilled in the art selects a suitable interface here, so that its detailed configuration should not be further discussed.
A first housing 18 is provided for receiving an input alternating voltage UACIs rectified and/or corrected to a rectified intermediate circuit voltage UVL(e.g., 400V) input stage 40. The electrical connection 38 is used here for connecting the rectified intermediate circuit voltage UVLThe circuit is completed to the second housing 20. For applying a rectified intermediate circuit voltage UVLConversion into an output dc voltage U suitable for the electromechanical interface 12 of the battery-operated electrical device 14 or the replacement battery pack adapter 16DC(e.g., 18V or 36V), the second housing 20 has a dc voltage converter 42. In order to also provide in the second housing 20 at the electromechanical interface 22 of the first housing 18 with the input stage 40Generated output DC voltage UDCTo supply the electrically powered device 14, the electrical connection 38 between the second housing 20 and the first housing 18 is also used for the converted output direct voltage UDCIs closed. Thus, the electrical connections 38 can simultaneously complete a plurality of different voltage circuits between the individual housings 18, 20 of the energy supply device 10.
Furthermore, the dc voltage converter 42 of the second housing 20 can be potential-isolated, so that the individual potentials of the housings 18, 20 are separated from one another in a dc manner similar to the application of the replacement battery pack. In this way disturbances (for example common-mode disturbances or compensation currents) can be avoided. Furthermore, by bringing the touchable part into contact with the input alternating voltage UACSeparated to improve safety when using the energy supply device 10.
Alternatively, it is also possible to envisage: each housing 18, 20 of the energy supply device 10 has an input stage 40 for inputting an alternating voltage U and a direct voltage converter 42ACIs rectified and/or corrected to a rectified intermediate circuit voltage UVLA DC voltage converter for converting the rectified intermediate circuit voltage UVLConverting the output DC voltage U into an electromechanical interface 12 suitable for a battery-operated electrical device 14DC. One of the housings 18, 20 can be provided with a voltage source for supplying an alternating voltage UAC A supply cable 32 supplied with the input alternating voltage UACIn this case, the electrical connection 38 between the housings 18, 20 is electrically connected and each converted into an output dc voltage UDC. In this way, an energy supply system 10 with redundant individual housings 18, 20 can be advantageously implemented in order to avoid a shutdown of the entire energy supply system 10 in the event of a failure of one of the individual input stages 40 and thus also to be able to continue to use the electrical system 14 in emergency operation with reduced output if necessary.
In order to be able to make the electrical device 14 independent of the input AC voltage U for a short time if necessaryACIn operation, an additional energy store 43, in particular an ultracapacitor, is integrated into the second housing 20. The additionalThe energy store provides the required output dc voltage U via the electromechanical interface 22 of the second housing 20DC. Furthermore, the output dc voltage U of the additional energy store 43DCThe electrical connection 38 between the housings 18, 20 of the energy supply device 10 can be connected to the electrical device 14 or to the other electromechanical interface 12 of the interchangeable battery pack adapter 16. Furthermore, if the electrically operated device 14 requires a high pulse current value (for example in the case of a high torque required in a short time), it is also possible to use such an additional energy store 43 to provide said high pulse current value.
Fig. 2 shows a system consisting of a battery-operated electric machine 14 in the form of an electric hammer 44 and an energy supply device 10 having two housings 18, 20. For the energy supply, the electric hammer 44 comprises two electromechanical interfaces 12 for the housings 18, 20 of the energy supply device 10, respectively. The interface 12 is usually used for energy supply by a corresponding replacement battery pack, which, however, is not shown here but can correspond in appearance substantially to the housings 18, 20 of the energy supply device. For example, the electric hammer can be supplied via each of its electromechanical interfaces 12 with an output dc voltage of 18V, which is added to the resulting operating voltage of 36V within the electric hammer 44 via a corresponding series circuit.
Without limiting the invention, the system may comprise different electrically powered devices 14, which are operated with the energy supply device 10 and which are configured as power tools, garden devices or household devices. Likewise, the number of electromechanical interfaces 12 on the electrically powered device 14 or the number of housings 18, 20 of the energy supply device 10 configured with the electromechanical interfaces 22 may vary. It is entirely possible to envisage more than two housings 18, 20 or electromechanical interfaces 12, 22.
The electric hammer 44 has a hammer 46, not shown in greater detail, for rotationally and/or percussive operation of the insertion tool 48 about or along a machining axis 50 by means of a drill chuck 52. The ram 46 is operated by a motor 54, only diagrammatically indicated, which is powered by power electronics 56. The power electronics 56 are controlled by a monitoring unit 58 integrated in the electric hammer 44, in order to regulate or control the electric motor 54, for example, as a function of a main switch 60 that can be actuated by an operator. However, a further detailed description of the electric machine 14 embodied as an electric hammer 44 is omitted here, since this is no longer of significance for the invention and the electric hammer 44 is to be understood as merely an example of a different electric machine 14 which can be supplied by the energy supply device 10.
In the illustrated embodiment, the housings 18, 20 of the energy supply device 10 are connected to one another by a cable connection 38. The energy supply of the energy supply device 10 is similar to that of fig. 1 by way of a supply cable 32 and a mains plug 34 fastened on one end with an input alternating voltage U of, for example, 230VACThe process is carried out. As explained for fig. 1, the input alternating voltage is converted into an output direct voltage U of, for example, 18VDCAnd is electrically connected to each individual electromechanical interface 12 of the hammer 44. In the hammer itself, two output DC voltages U are providedDCThe phases add up to an operating voltage of, for example, 36V.
In order to be able to push the individual housings 18, 20 into or out of the electromechanical interface 12 of the hammer 14, the cable connection 38 has a length which exceeds the longitudinal extent L of the housings 18, 20 by at least 2cm (see fig. 1). In a typical replacement battery pack for a power tool, the length of the cable connection 38 can be, for example, between about 10 and 15 cm. It is also contemplated that the cable connector 38 can be configured to be pushed or pulled into one of the housings 18, 20 to shorten the cable length for better hand operation after the housings 18, 20 are pushed into the electromechanical interface 12 of the electric hammer 44.
Fig. 3 shows the battery-operated electric device 14 in the form of a dicing saw and/or a mitre saw 62. The dicing and/or mitre saw 62 has a pivot arm 64 which, along a longitudinal axis 66, comprises, in particular, a running unit 68 equipped with the electric motor 54 and two electromechanical interfaces 12 arranged parallel next to one another for receiving two replacement battery packs, not shown. The replacement battery packs are switched on electrically in series, so that the result is produced by individual output dc voltages (for example 18V each)And an operating voltage of 36V. Instead of using a replaceable battery pack, the dicing saw and/or the mitre saw 62 can also be operated with the energy supply device 10. To this end, the two housings 18, 20 can first be connected to one another by means of an electrical connection 38 in the form of a plug-in or sliding connection 70 (only indicated by a hook) in order then to push them together with their respective electromechanical interfaces 22 into the respective electromechanical interfaces 12 of the dicing and/or miter saw 62. Thus, unlike the embodiment according to fig. 1 and 2, no cable connection between the housings 18, 20 is required. In accordance with the replacement battery pack, the power supply device 10 also supplies an output dc voltage U of 18V each via its housing 18, 20DCSo that a resulting operating voltage of 36V is generated by the series circuit inside the dicing saw and/or the miter saw 62.
The pivot arm 64 of the dicing saw and/or the mitre saw 62 serves for the movable mounting of the operating unit 68 and the tool carrier 72 operatively connected thereto by means of a handle 74. For this purpose, the pivot arm 64 (in particular relative to the workpiece support surface 80) can be pivoted about the pivot axis 76 and/or can be connected to a base unit 78 of the dicing and/or miter saw 62 so as to be rotatable about the longitudinal axis 66. For machining the workpiece, a saw blade 82, which is driven in rotation by the electric motor 54 of the operating unit 68, is received in the tool carrier 72, which saw blade is mounted in a machining plane 84, similarly to the tool carrier 72, by means of the pivot arm 64, in an inclined and/or rotatable manner relative to the workpiece support surface 80. In order to protect the operator from the saw blade 82, a protective hood 86, which is preferably mounted movably, can be provided on the pivot arm 64. The base unit 78 of the dicing and/or miter saw 62 can rest on a base (e.g., a floor, table, or the like) by means of at least one brace 88. As already shown in fig. 2, a further detailed description of the electric device 14 embodied as a dicing saw and/or as a mitre saw 64 is omitted here, since this is no longer of significance for the invention.
Fig. 4 shows a battery-operated electric machine 14 embodied as a hammer drill 90. Unlike the two electric devices 14 according to fig. 2 and 3, the hammer drill 90 has only one single electromechanical interface 12 with correspondingly designed electrical contacts 100 for the energy supply at an operating voltage of, for example, 36V and/or for the transmission of operating-relevant data such as, for example, temperature, coding or the like. Similarly to the electric hammer 44 according to fig. 2, the hammer drill 90 also has a hammer, not shown in greater detail, for rotationally and/or percussive operation of the insertion tool about or along a machining axis 92 by means of a drill chuck 94. The hammer is driven by the motor 54, which is only indicated, by means of a main switch 98, which is positioned in the handle 96 and which controls power electronics, which are likewise not indicated in greater detail, by means of a monitoring unit, which is not indicated in greater detail.
In order to be able to operate the replacement battery pack, for example, at 18V each on the hammer drill 90, a replacement battery pack adapter 16 can be used which brings two output dc voltages U, each having 18VDCThe replacement battery packs of (a) are switched in series so that they provide the resulting operating voltage of 36V. To this end, the replacement battery pack adapter 16 has an electromechanical interface 22 that is complementary to the electromechanical interface 12 of the hammer drill 90. The interchangeable battery pack adapter 16 provides an operating voltage of 36V via this interface 22 and the electrical contacts 100 arranged therein. Furthermore, the exchangeable battery pack adapter 16 has two electromechanical interfaces 12 for receiving corresponding exchangeable battery packs. The electromechanical interface 12 is also provided with corresponding electrical contacts 100 for the electrical contacts 100 of the replacement battery pack.
Instead of a replaceable battery pack, the energy supply device 10 can also be used in the manner already described with its two housings 18, 20 for supplying energy to the hammer drill 90. The electromechanical interface 22 is designed in a manner similar to the replacement battery pack and is complementary to the electromechanical interface 12 of the replacement battery pack adapter 16, so that the output dc voltages U provided by the housings 18, 20, for example 18V eachDCThe resulting operating voltage of 36V is added in the replacement battery pack adapter.
The releasable connection between the exchangeable battery pack adapter 16 and the hammer drill 90 on the one hand and the housings 18, 20 of the energy supply device 10 on the other hand can additionally be locked against unintentional release by means of a mechanical locking device 24 in each case. In this case, the locking device 24 of the housing 18, 20 of the replacement battery pack adapter 16 or of the energy supply device 10 has a spring-loaded push button 26, which is operatively connected to a locking element 28 of the housing 18, 20 of the replacement battery pack adapter 16 or of the energy supply device 10. Due to the elasticity of the push button 26 and/or the locking element 28, the locking device 26 automatically snaps into the hammer drill 90 or into the corresponding retaining device 30 of the electromechanical interface 12 of the replacement battery pack adapter 16 when the housing 18, 20 is pushed in. If the operator presses one of the push buttons 26 in the insertion direction E, the lock is released and the operator can remove or push out the respective housing 18, 20 of the energy supply device 10 or the replacement battery pack adapter 16 counter to the insertion direction.
Finally, it is pointed out that the invention is not limited to the exemplary embodiments shown in fig. 1 to 4. In particular, the electromechanical interface of the housings 18, 20 of the energy supply device 10 is to be understood as exemplary. The respective number of the plurality of housings 18, 20 is suitable for the voltage values mentioned and for the energy supply device 10. For example, an energy supply device 10 with two 36V housings, but also four 18V housings, can be used on an electric device 14 which is operated with a 72V battery. It should furthermore be understood that the mentioned input alternating voltage UACIs country-specific.

Claims (11)

1. An energy supply device (10) for an electric battery-operated device (14) or a replacement battery pack adapter (16) having at least two electromechanical interfaces (12) for a replacement battery pack, respectively, wherein the energy supply device (10) is to be supplied with an alternating voltage (Uc)AC) Preferably, the system voltage is converted into an output direct voltage (U) for the electromechanical interface (12) of the battery-operated electrical device (14) or of the replacement battery pack adapter (16), respectivelyDC) Characterized in that the energy supply device (10) has at least two mechanically separate and electrically grounded phasesInterconnected housings (18, 20), each of said housings (18, 20) having an electromechanical interface (22), wherein the electromechanical interfaces (22) of the housings (18, 20) are capable of engaging one of the at least two electromechanical interfaces (12) of the battery-operated electrical device (14) or of the replacement battery pack adapter (16), respectively.
2. The energy supply device (10) according to claim 1, characterized in that the electrical connection (38) between the housings (18, 20) is realized as a cable connection (36), a plug connection (70) or a sliding connection (70).
3. The energy supply device (10) according to claim 2, characterized in that a first of the housings (18) has a connection for connecting the input alternating voltage (U) toAC) In particular, the network voltage is rectified and/or corrected to a rectified intermediate circuit voltage (U)AL) Wherein the electrical connection (38) connects the rectified intermediate circuit voltage (U) to the input stage (40)VL) The circuit is connected to at least one further housing (20).
4. The energy supply device (10) according to claim 3, characterized in that at least the first housing (18) has a terminal for receiving the input alternating voltage (U)AC) In particular a supply cable (32) for supplying the mains voltage.
5. Energy supply device (10) according to one of the preceding claims 3 or 4, characterized in that at least one further of the housings (20) has a direct voltage converter (42) which converts the rectified intermediate circuit voltage (U)VL) Converting the output direct voltage (U) into the electromechanical interface (12) suitable for the battery-operated electrical device (14) or the replacement battery pack adapter (16)DC)。
6. The energy supply device (10) according to claim 5, characterized in that the direct voltage converter (42) of the at least one further housing (20) is potential-isolated.
7. The energy supply device (10) according to claim 5 or 6, characterized in that the electrical connection (38) outputs the output direct voltage (U)DC) An electrical circuit is completed to the first housing (18).
8. Energy supply device (10) according to claim 1 or 2, characterized in that each housing (18, 20) has an input stage (40) for inputting the alternating voltage (U) and a direct voltage converter (42)AC) In particular, power factor rectification and/or correction of the mains voltage to a rectified intermediate circuit voltage (U)AL) For converting the rectified intermediate circuit voltage (U)VL) Converting the output direct voltage (U) into the electromechanical interface (12) suitable for the battery-operated electrical device (14) or the replacement battery pack adapter (16)DC)。
9. The energy supply device (10) according to claim 8, characterized in that the direct voltage converter (42) in each housing (18, 20) is potential-isolated.
10. The energy supply device (10) according to any one of the preceding claims, characterized in that an additional energy store, in particular a supercapacitor, is integrated in at least one of the housings (18, 20).
11. A system consisting of at least one battery-operated electrical device (14) and/or a replacement battery pack adapter (16) and an energy supply device (10) according to one of the preceding claims, wherein the battery-operated electrical device (14) or the replacement battery pack adapter (16) for energy supply of the electrical device (14) has at least two electromechanical interfaces (22) for a housing (18, 20) of the energy supply device (10), respectively.
CN202111360012.1A 2020-11-25 2021-11-17 Energy supply device and system comprising same Pending CN114552692A (en)

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DE102020214780.9 2020-11-25
DE102020214780.9A DE102020214780A1 (en) 2020-11-25 2020-11-25 Energy supply device for a battery-powered electrical device or a replaceable battery pack adapter and system consisting of at least one battery-powered electrical device and/or a replaceable battery pack adapter and a power supply device

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CN114552692A true CN114552692A (en) 2022-05-27

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Publication number Priority date Publication date Assignee Title
EP4289562A1 (en) * 2022-06-07 2023-12-13 Hilti Aktiengesellschaft Machine tool with parallel output and motor axes

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Publication number Priority date Publication date Assignee Title
US6495932B1 (en) 1997-09-26 2002-12-17 Hitachi Koki Co., Ltd. DC power source unit
US6243276B1 (en) 1999-05-07 2001-06-05 S-B Power Tool Company Power supply system for battery operated devices
DE202017105258U1 (en) 2017-08-31 2017-09-08 Robert Bosch Gmbh Battery Pack Adapter

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