EP4078757A1 - Outil de traitement électrique doté d'un dispositif d'alimentation en énergie - Google Patents

Outil de traitement électrique doté d'un dispositif d'alimentation en énergie

Info

Publication number
EP4078757A1
EP4078757A1 EP20808045.7A EP20808045A EP4078757A1 EP 4078757 A1 EP4078757 A1 EP 4078757A1 EP 20808045 A EP20808045 A EP 20808045A EP 4078757 A1 EP4078757 A1 EP 4078757A1
Authority
EP
European Patent Office
Prior art keywords
energy
supply device
current
measuring
processing device
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
EP20808045.7A
Other languages
German (de)
English (en)
Inventor
Philipp Zipf
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
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP4078757A1 publication Critical patent/EP4078757A1/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/10—Parallel operation of dc sources
    • H02J1/108—Parallel operation of dc sources using diodes blocking reverse current flow
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304—Overcurrent protection
    • 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
    • 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
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • 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
    • 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
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/10—The network having a local or delimited stationary reach
    • H02J2310/20—The network being internal to a load
    • H02J2310/22—The load being a portable electronic device
    • 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
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially

Definitions

  • the invention relates to an electrical processing device with an energy supply device according to the preamble of independent claim 1.
  • Electrical processing devices are offered in very different performance classes depending on their intended use. For example, there are battery-operated handheld power tools in the lower performance classes that operate at 10.8 V (often nominally also referred to as 12 V) or 14.4 V, while in the medium to higher performance classes there are predominantly devices in voltage classes of 18 V, 36 V, 54 V or 72V can be used.
  • the voltage values result from the interconnection (parallel or serial) of the battery cells used.
  • the battery cells are preferably designed as lithium-based battery cells, for example Li-Ion, Li-Po, Li-metal or the like, with a cell voltage of 3.6 V, a battery cell usually being a cylindrical round cell, the cell poles of which are on Ends of the cylindrical shape are angeord net.
  • the following invention does not depend on the type and design of the battery cells used, but can be applied to any energy source, e.g. in addition to round cells, pouch cells or the like.
  • a mains supply with, for example, 120 V or 230 V can also be used as the energy source.
  • replaceable batteries or replaceable battery packs have established themselves as an energy source in many battery-operated processing devices. These are connected to one another in a non-positive and / or form-fitting releasable manner via corresponding interfaces on the exchangeable battery packs and the battery-operated processing devices.
  • a “releasable connection” is to be understood as meaning, in particular, a connection that can be released and established without tools - that is, by hand. It is now common practice to use power tools with very high performance requirements with several interchangeable battery packs in serial or parallel operation. In serial operation, for example, the use of two 18V exchangeable battery packs leads to a supply voltage of 36 V.
  • a particular advantage of using several interchangeable battery packs in such a battery-operated processing device is the preservation of compatibility with existing battery-operated power tools of lower performance classes that are only operated with an interchangeable battery pack. There are already power tools that can be operated with both a mains and a battery power supply.
  • So-called “power ORing” can be used for parallel operation of several exchangeable battery packs as well as for mixed operation of mains and battery power supply of an electrical processing device.
  • an electrical charge equalization between the energy sources, in particular between the energy stores can be carried out by means of diodes.
  • an electrical energy supply device has at least two energy stores which are each connected to at least one diode in series to form a star point. If the charge states of the energy stores are unequal, the charge states of the energy stores can be matched by means of leakage currents from the diodes.
  • MOSFETs can alternatively be used in conjunction with a so-called “ideal diode controller" (e.g. LTC4357, ZXGD3112N7, LM5051).
  • the total current from a plurality of energy sources can in principle have a higher value than the current from a single energy source.
  • the total current is limited to the lowest individual current of the energy sources. It is the object of the invention to provide an electrical processing device that, while maximizing the total current available from the energy sources connected to the electrical processing device, ensures reliable operation of the individual energy sources.
  • the invention relates to an electrical processing device with an energy supply device and with a control or regulating unit, the energy supply device having at least two energy sources, each of which is connected in series with an electronic component ORing its individual currents to a common star point that a resulting total current for supplying the electrical processing device results.
  • the energy supply device having at least two energy sources, each of which is connected in series with an electronic component ORing its individual currents to a common star point that a resulting total current for supplying the electrical processing device results.
  • at least a subset of the energy sources, in particular each energy source is assigned a current measuring unit for measuring the individual currents of the energy sources, the control or regulation unit adapting the total current to the measured individual currents.
  • the individual energy sources can thus be precisely analyzed on the basis of the recorded current measured values in order to ensure that with the maximum possible total current, the individual energy sources are not operated outside of their respectively permitted range.
  • a power supply device with a higher output current and a higher maximum output can be achieved.
  • a shunt resistor, a Hall sensor or the like can be used as the current measuring unit.
  • the control or regulating unit can be designed as a microprocessor, a DSP, an ASIC or the like and, based on the information provided by the current measuring units and knowledge of the type of energy source and its permitted individual currents, assess whether the total current needs to be reduced or not can be increased.
  • electrical processing devices are to be understood as meaning, for example, electrical tools for processing workpieces by means of an electrically driven insert tool.
  • the electrical works tool be designed both as an electric hand tool and as a stationary power tool machine.
  • Typical power tools in this context are hand or standing drills, screwdrivers, impact drills, rotary hammers, planes, angle grinders, orbital grinders, polishing machines, circular, table, chop saw and jigsaws or the like.
  • Garden equipment such as lawn mowers, lawn trimmers, pruning saws or the like can also be used as electrical processing equipment.
  • the invention can also be used on household appliances such as vacuum cleaners, mixers, etc.
  • the battery voltage of an exchangeable battery pack is usually a multiple of the voltage of an individual battery cell and results from the interconnection (parallel or serial) of the individual battery cells.
  • a rechargeable battery cell is typically designed as a galvanic cell which has a structure in which one cell pole comes to rest on one end and another cell pole on an opposite end. In particular, the battery cell has a positive cell pole at one end and a negative cell pole at an opposite end.
  • the battery cells are preferably designed as lithium-based battery cells, e.g. Li-Ion, Li-Po, Li-metal or the like.
  • the invention can also be used for interchangeable batteries with Ni-Cd, Ni-MH cells or other suitable types of cells.
  • voltage classes of 3.6 V, 7.2 V, 10.8 V, 14.4 V, 18 V For common Li-ion battery cells with a cell voltage of 3.6 V, voltage classes of 3.6 V, 7.2 V, 10.8 V, 14.4 V, 18 V,
  • a battery cell is preferably designed as an at least essentially cylindrical round cell, the cell poles being arranged at the ends of the cylindrical shape.
  • the invention is not dependent on the type and design of the battery cells used, but can be applied to any interchangeable battery packs and battery cells, e.g. in addition to round cells, pouch cells or the like. It can also be applied to non-rechargeable batteries and to a mains power supply that supplements the rechargeable battery or battery supply.
  • the energy supply device has a voltage measuring device for each energy source for measuring the voltage provided by the respective energy source.
  • the energy supply device has a voltage measuring device for measuring a supply voltage at the star point.
  • a plausibility check of the measured current values can advantageously be carried out by means of the measured voltage values.
  • the Energyver supply device has a current measuring unit for measuring the total current at the star point.
  • the measured total current can also advantageously be used for plausibility checking of the measured individual current values of the energy sources.
  • the energy supply device can have a temperature measuring device for measuring a temperature of the energy supply device. Using the measured temperature, it is possible to limit the total current in order to avoid overheating of the energy supply device or individual components.
  • Protection circuits against overvoltage and / or against overcurrent offer further protection against overloading the power supply device according to the invention.
  • Fig. 1 a block diagram of a first embodiment of a power supply device according to the invention for an electrical processing device
  • Fig. 2 a block diagram of a second embodiment of the inventions to the invention power supply device for an electrical cal processing device and
  • Fig. 3 a block diagram of a third embodiment of the inventions to the invention power supply device for an electrical cal machining device.
  • FIG. 1 shows a block diagram of a first embodiment of an inventive energy supply device 10 of an electrical processing device not shown in detail.
  • an electrical machining device in the context of the invention is to be understood, for example, as an electric tool for machining workpieces by means of an electrically driven insert tool.
  • the power tool can be designed both as a battery-operated electric hand tool and as a stationary power tool that is supplied by exchangeable battery packs and possibly also with mains power.
  • Typical power tools in this context are hand or standing drills, screwdrivers, impact drills, rotary hammers, planes, angle grinders, orbital grinders, polishing machines, circular, table, miter saws and jigsaws or the like.
  • Garden equipment such as lawn mowers, lawn trimmers, pruning saws or the like can also be used as electrical processing equipment.
  • the invention can also be used for household appliances such as vacuum cleaners, mixers, etc.
  • the energy supply device 10 is designed as an energy ORing system (Power ORing) with a first energy source 12 and a second energy source 14 trained.
  • the two energy sources 12 and 14 can be designed as replaceable battery packs or replaceable batteries 16 of the electrical processing device. It is also conceivable that the first energy source 12 is an exchangeable battery pack 16 and the second energy source 14 is the power supply unit of a mains power supply.
  • very different exchangeable battery packs or exchangeable batteries 16 and energy sources 12, 14 can be used. Since the person skilled in the art is familiar with the design of such exchangeable battery packs or exchangeable batteries 16 and energy sources 12, 14, this will not be discussed further below.
  • the number of energy sources can also vary. The invention is therefore not limited to two energy sources 12, 14.
  • the two energy sources 12, 14 are each connected in series with an electronic component 18 for ORing their individual currents li and b to form a common star point 20.
  • the electronic components 18 can be implemented as diodes 22, for example, the cathodes of which are at the same potential at the star point 20.
  • the diodes 22 can be designed, for example, as Shottkydi oden which have a relatively high leakage current of up to approximately 100 mA in the reverse direction. In principle, however, other types of diodes that are suitable for ORing the individual currents are also possible. Instead of Diodes 22, however, it is also conceivable to use MOSFETs with an "Ideal Diode Controller IC, such as an LTC4357, ZXGD3112N7, LM5051 or the like.
  • the power ORring of the first energy source 12 with its individual current li and the second energy source 14 with its individual current b results in a total current ls in the current flow direction after the star point 20 for supplying the electrical processing device or a consumer 24 contained therein, for example as an electric motor and / or can be designed as a STEU or control circuit for the electric motor. Virtually everything that significantly influences the power requirement of the electrical processing device can be used as the consumer 24 of the electrical processing device.
  • each energy source 12, 14 is supplied with a current measuring unit 26 for measuring the individual currents li, b of the energy source 12, 14.
  • the current measuring unit 26 can be designed, for example, as a shunt resistor 28, which is connected in series with the energy source 12, 14 and the electronic component 18 for ORing the individual currents li, ge.
  • a HALL sensor or the like for current measurement is also conceivable.
  • the current measuring units 26 are connected to a control or regulating unit 30 of the energy supply device 10.
  • the control or regulating unit 30 adapts the total current Is to the measured individual currents Ii, I2 in such a way that the energy source 12, 14 can always be operated in their respective permissible operating range.
  • the information about the maximum permissible total current Is is provided to the consumer 24 by the control or regulation unit 30, for example via a bus system, an analog voltage signal, a frequency-modulated signal or the like.
  • the consumer 24 of the electrical processing device can then adjust the power consumption in such a way that, limited by the internal resistances and supply voltages of the individual energy sources 12, 14, an individual current Li, I2 can be drawn from the energy sources 12, 14, which is within the permitted operating range .
  • FIG. 2 shows a block diagram of a second exemplary embodiment of the energy supply device 10 according to the invention.
  • the components provided with the same reference symbols are identical to those according to FIG. 1 and should therefore not be explained again here.
  • the main difference to the first exemplary embodiment is a current measuring unit 32 for measuring the total current Is at the star point 20.
  • the current measuring unit 32 can also be designed as a shunt resistor 28 or as another component suitable for current measurement.
  • the current measuring unit 32 is connected to the control or regulating unit 30 so that a plausibility check of the measured individual currents I 1, I 2 of the energy sources 12, 14 is possible by means of the measured total current Is.
  • the individual voltages Ui, U2 of the two energy sources 12, 14 and the supply voltage Us at the star point are recorded by the control and regulating unit 30. These can also be used to check the plausibility of the measured individual currents li.
  • FIG. 3 shows a block diagram of a third exemplary embodiment of the energy supply device 10 according to the invention.
  • the individual components essentially correspond to those from FIGS. 1 and 2, although the energy sources 12, 14 and 34 operated in parallel have now been shown one below the other for the sake of a better overview.
  • 34 denotes an nth energy source, which is also designed here as a power supply unit (AC / DC conversion) of a mains power supply.
  • All n energy sources 12, 14, 34 are connected in parallel in the sense of a power O-ring by means of electronic components 18 designed as diodes 22, for example, for ORing the individual currents li, b, ... In at the star point 20, so that the individual currents li, I2, ... I n of the n energy sources 12, 14, 34 after the star point 20 result in the total current Is for supplying the electrical processing device 12 or a consumer 24 contained therein.
  • the consumer 24 of the electrical processing device 12 can also be divided into several individual, mutually dependent or independent consumers 24a, 24b.
  • the consumers 24a, 24b are several electric motors for driving a mower and a gear train of a lawnmower that is separate therefrom.
  • the control or regulating unit 30 receives information about the measured individual currents li, I2, ... In the n energy sources 12, 14, 34 and the total current Is at the star point 20 by means of the current measuring units 26 and 32. These can be used as shunt Resistors 28 or other components suitable for current measurement can be designed. In addition to the current measuring units 26 and 32, the control or regulating unit 30 also receives specific data D from the energy sources 12, 14, 34, such as their type, their permissible operating range, temperature measured values, etc. This can be used in addition to adapting the total current ls draw in. In addition, means for detecting the individual voltages U n of the energy sources 12, 14, 34 and the supply voltage Us at the star point 20 are identified by 36 and 38.
  • the means 36, 38 can additionally also be designed as overvoltage protection 40 against voltage peaks, such as those that can arise, for example, when an energy source 12, 14, 34 designed as an exchangeable battery pack 16 is removed while the electrical processing device is in operation.
  • overvoltage protection 40 against voltage peaks, such as those that can arise, for example, when an energy source 12, 14, 34 designed as an exchangeable battery pack 16 is removed while the electrical processing device is in operation.
  • TVS diodes, capacitors or other means suitable for protection against overvoltages come into consideration.
  • the means 36, 38 can also have the function of an overcurrent protection 42.
  • Such protective circuits can be implemented, for example, by means of fuses, MOSFETs or correspondingly suitable means for disconnecting the respective current paths.
  • the energy supply device 10 also has a temperature measuring device 44 for measuring a temperature T.
  • the control or regulating unit 30 can, if necessary, limit the total current Is such that the energy sources 12, 14, 34 on the one hand remain in their permitted operating range and on the other hand the thermal limits of the energy supply device 10 are maintained. This is particularly useful when the energy sources 12, 14, 34 themselves cannot transmit any individual temperature values to the control or regulating unit 30 by means of the data D.
  • the invention is not limited to the exemplary embodiments shown in the three figures. So it is conceivable that instead of all energy sources only a subset is equipped with a current measuring device and / or a voltage measuring device. This can be useful, for example, with an electrical processing device that is supplied via two exchangeable battery packs 16 and in which the individual current of one of the two exchangeable battery packs can be calculated according to Kirchoff's laws using the total current at the star point and the measured individual current of the other exchangeable battery pack 16.

Abstract

L'invention concerne un outil de traitement électrique comprenant un dispositif d'alimentation en énergie (10) et une unité de commande en boucle ouverte ou en boucle fermée (30), le dispositif d'alimentation en énergie (10) comprenant au moins deux sources d'énergie (12, 14, 34) qui sont interconnectées, individuellement dans un circuit série, avec un composant électronique (18) d'application d'une opération OU au courant individuel (I1, I2, In) du composant électronique en question, pour former un point neutre commun (20), ce qui a pour conséquence un courant total obtenu (IS) d'alimentation de l'outil de traitement électrique (12). Selon l'invention, au moins un sous-ensemble des sources d'énergie (12, 14, 34), en particulier chaque source d'énergie (12, 14, 34), se voit attribuer une unité de mesure de courant (26) permettant de mesurer le courant individuel (I1, I2, In) de la source d'énergie (12, 14, 34) en question, l'unité de commande en boucle ouverte ou en boucle fermée (30) adaptant le courant total (IS) aux courants individuels mesurés (I1, I2, In).
EP20808045.7A 2019-12-20 2020-11-13 Outil de traitement électrique doté d'un dispositif d'alimentation en énergie Pending EP4078757A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019220475.9A DE102019220475A1 (de) 2019-12-20 2019-12-20 Elektrisches Bearbeitungsgerät mit einer Energieversorgungsvorrichtung
PCT/EP2020/082035 WO2021121813A1 (fr) 2019-12-20 2020-11-13 Outil de traitement électrique doté d'un dispositif d'alimentation en énergie

Publications (1)

Publication Number Publication Date
EP4078757A1 true EP4078757A1 (fr) 2022-10-26

Family

ID=73455682

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20808045.7A Pending EP4078757A1 (fr) 2019-12-20 2020-11-13 Outil de traitement électrique doté d'un dispositif d'alimentation en énergie

Country Status (6)

Country Link
US (1) US20230015527A1 (fr)
EP (1) EP4078757A1 (fr)
JP (1) JP2023507485A (fr)
CN (1) CN114846709A (fr)
DE (1) DE102019220475A1 (fr)
WO (1) WO2021121813A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11852691B2 (en) 2021-08-24 2023-12-26 Rockwell Automation Technologies, Inc. Input/output (IO) module power supply with online load test capability
US11899445B2 (en) * 2021-09-27 2024-02-13 Rockwell Automation Technologies, Inc. High availability redundant power distribution systems and methods
US11860599B2 (en) 2021-09-27 2024-01-02 Rockwell Automation Technologies, Inc. High availability redundant power distribution system diagnostic operations

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3247618B2 (ja) * 1996-09-12 2002-01-21 インターナショナル・ビジネス・マシーンズ・コーポレーション 充電装置及び充電機能付き電子機器
FR2815789B1 (fr) * 2000-10-24 2003-01-31 Thomson Csf Dispositif d'alimentation electrique a haut niveau de securite
JP3936179B2 (ja) * 2001-11-30 2007-06-27 パナソニック・イーブイ・エナジー株式会社 電池電源装置とその電流検出方法
JP3872758B2 (ja) * 2003-01-08 2007-01-24 株式会社日立製作所 電源制御装置
ATE456250T1 (de) * 2007-04-12 2010-02-15 Alcatel Lucent Überspannungsschutzschaltung für die oring- schaltung von netzteilen
EP2538515A1 (fr) * 2011-06-20 2012-12-26 Dialog Semiconductor GmbH Régulateur de tension à courant limité à entrées multiples et procédé correspondant
JP6026908B2 (ja) * 2013-02-07 2016-11-16 株式会社マキタ 電動機械器具及びバッテリパック
JP6023662B2 (ja) * 2013-05-31 2016-11-09 株式会社マキタ 電動機械器具、及びアタッチメント
DE102013221113A1 (de) 2013-10-17 2015-05-07 Robert Bosch Gmbh Elektrische Energiespeichervorrichtung
CN110277813B (zh) * 2019-06-13 2021-03-23 华为技术有限公司 可折叠的电子设备

Also Published As

Publication number Publication date
JP2023507485A (ja) 2023-02-22
US20230015527A1 (en) 2023-01-19
DE102019220475A1 (de) 2021-06-24
CN114846709A (zh) 2022-08-02
WO2021121813A1 (fr) 2021-06-24

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