EP4263265A1 - Antriebsstrang für eine arbeitsmaschine, verfahren zum betreiben des antriebsstrangs und arbeitsmaschine - Google Patents
Antriebsstrang für eine arbeitsmaschine, verfahren zum betreiben des antriebsstrangs und arbeitsmaschineInfo
- Publication number
- EP4263265A1 EP4263265A1 EP21834766.4A EP21834766A EP4263265A1 EP 4263265 A1 EP4263265 A1 EP 4263265A1 EP 21834766 A EP21834766 A EP 21834766A EP 4263265 A1 EP4263265 A1 EP 4263265A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive train
- electric motor
- individual
- drive
- designed
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims description 16
- 238000004146 energy storage Methods 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 description 6
- 230000015654 memory Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
- E02F9/2062—Control of propulsion units
- E02F9/207—Control of propulsion units of the type electric propulsion units, e.g. electric motors or generators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
- B60L1/003—Supplying electric power to auxiliary equipment of vehicles to auxiliary motors, e.g. for pumps, compressors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/40—Working vehicles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Definitions
- the present invention relates to a drive train for a work machine according to the preamble of claim 1, a method for operating a drive train of a work machine according to the preamble of claim 8 and a corresponding work machine.
- Electrically driven work machines such as wheel loaders, skid steer loaders, telehandlers, dumpers or even excavators, are known in the prior art. These electrically driven working machines are either purely electrically driven, i.e. they only have an electric battery or an electric accumulator for their energy supply, or they are diesel-electrically driven, which means that the required energy is provided by a diesel-driven generator, usually in a Connection to an electrical buffer storage, such as an appropriately sized capacitor, is provided. In all cases, the mechanical power required for the travel drive and the working drive is provided by one or more electric motors. Furthermore, hybrid-electric working machines are also known in which the mechanical power required for operation is primarily provided by an internal combustion engine, usually a diesel engine. An additionally provided electric motor is fed by a battery or an accumulator and typically assumes a so-called boost function here.
- DE 20 2014 000 738 U1 describes a wheel loader driven purely by an electric motor, which has a first electric motor for a travel drive and a second electric motor for a working drive.
- Electrically driven cars are also known in the prior art, for example from DE 10 2019 109 550 A1, DE 10 2013 102 161 A1 or DE 10 2010 020 576 A1.
- the known electrically driven working machines are disadvantageous compared to the known electrically driven passenger cars in that they are produced in significantly smaller quantities, which in turn significantly increases the cost per unit.
- electrically driven work machines require an electrical on-board network that is operated with higher operating voltages due to the significantly greater mechanical power to be applied compared to passenger cars.
- a vehicle electrical system designed for higher operating voltages however, in turn increases its costs. This means that electrically powered work machines are significantly more expensive than electrically powered cars.
- the invention relates to a drive train for a work machine, comprising at least one electric motor and an electrical energy store, the at least one electric motor being designed to provide mechanical power and the energy store being designed to supply the at least one electric motor with electrical power.
- the drive train according to the invention is characterized in that the energy store comprises at least two individual stores electrically connected in series.
- the invention thus describes a drive train that is suitable for driving a work machine. Since work machines usually work under high drive loads and, in particular, also produce comparatively high work performance in absolute terms, the drive train according to the invention differs, for example, from a passenger car drive train, which is typically operated in a utilization range of 5% to 10% of the maximum output, and in particular in comparison absolutely lower mechanical performance.
- the drive train includes at least one electric motor. Since a work machine usually requires at least one working drive in addition to a travel drive, the at least one electric motor can be assigned to the travel drive and to the at least one working drive in equal measure.
- the drive train preferably comprises two or more electric motors, of which at least one electric motor is assigned to the traction drive and at least one further electric motor is assigned to the working drive.
- the two or more electric motors drive a summation gear, for example, and an output of the summation gear can equally drive the travel drive and the working drive.
- the at least one electric motor is preferably an asynchronous motor.
- the at least one electric motor is designed to provide mechanical power.
- the mechanical power is advantageously provided via a motor shaft of the at least one electric motor and can subsequently be subjected to speed and torque conversion, for example via a gearbox or a transmission step.
- the mechanical power is then made available to the travel drive or the working drive.
- the transmission is preferably designed as a multi-stage manual transmission, in particular a synchromesh transmission, which converts a mechanical input power provided by at least one electric motor in terms of its speed and its torque according to a selected stage.
- electric motors have a comparatively large range of speeds from zero to around 20,000 rpm compared to internal combustion engines, the use of a manual transmission and corresponding speed ratio can generate a comparatively high resulting torque, which is necessary for the operation of a Working machine is of great advantage, since heavy work can also be carried out in this way.
- the drive train includes an electrical energy store, which is preferably designed as a rechargeable Li-ion battery.
- the energy store stores electrical energy that can be made available for the operation of the at least one electric motor in order to supply the at least one electric motor with the electrical power required in each case.
- the electrical energy can also be made available to operate other electrical consumers, such as pumps, valves, computing units, air conditioning devices in the driver's cab, displays, lights or headlights.
- the energy store comprises at least two individual stores electrically connected in series.
- two or more comparatively inexpensive, electrical, individual energy stores can be used in series, each of which can provide only a portion, for example 1/n portion, of the operating voltage required to operate the comparatively powerful machine n is the total number of individual memories connected in series. Due to the series connection, the individual voltages of the individual storage units add up so that the required operating voltage is available in total. Provision is preferably made for the at least two individual accumulators to be designed to individually supply a passenger car drive train with electrical power.
- the drive train is designed to charge the at least two individual accumulators separately with electrical energy by means of an external charging device. I.e. so. That each individual memory can be loaded individually and independently of the one or more other individual memories.
- the car charging stations that already exist in a comparatively large number, in particular from the car quick-charging network, can be used to charge the individual storage devices.
- the charging process is also reduced by about half the charging time that would otherwise be required, since all individual storage devices can be charged in parallel and each with the maximum possible current.
- the drive train is designed to supply the at least one electric motor with electrical power using at least one of the at least two individual accumulators and at the same time at least one other of the at least two individual accumulators with electrical energy by means of the external charging device to load.
- all electric motors are arranged in a common housing.
- This enables all electric motors to be arranged in a space- and weight-saving manner within the drive train in a working machine.
- the common housing saves weight and costs compared to two or more individual housings.
- Two electric motors can be built, for example, axially one behind the other in a common housing, with the motor shafts being able to point out of the housing in opposite axial directions, for example.
- an arrangement of several electric motors axially next to one another in a correspondingly designed housing is also possible and preferred, so that all motor shafts can point in the same axial direction, for example.
- the invention also relates to a method for operating a drive train for a work machine, the drive train comprising at least one electric motor and an electrical energy storage device, mechanical power being provided by the at least one electric motor and the at least one electric motor being supplied with electrical power by the energy storage device.
- the method according to the invention is characterized in that the electrical power is provided by at least two individual storage devices which are electrically connected in series and together represent the energy storage device. This results in the advantages already described in connection with the drive train according to the invention.
- the at least two individual accumulators are each charged separately with electrical energy by means of an external charging device.
- the at least one electric motor is supplied with electrical power by at least one of the at least two individual accumulators and at the same time at least one other of the at least two individual accumulators is charged with electrical energy by means of the external charging device.
- the invention further relates to a working machine, comprising a drive train according to the invention. This also results in the advantages already described in connection with the drive train according to the invention for the working machine according to the invention.
- FIG. 1 as an example and schematically a possible embodiment of a working machine according to the invention
- FIG. 2 shows an example and a schematic of a possible embodiment of a method according to the invention for operating a drive train of a work machine in the form of a flow chart.
- the electric drive train 11 in turn comprises a working drive 20 with a first electric motor 21 and a working device 22, a travel drive 30 with a second electric motor 31 and driven vehicle wheels 32, and an electric energy store 12.
- the first electric motor 21 is for this purpose designed to provide a first mechanical power to operate the working drive 20 and to actuate the working device 22 .
- the second electric motor 31 is designed to provide a second mechanical power for operating the traction drive 30 and to generate propulsion at the vehicle wheels 32 in a direction desired by the operator of the working machine 10 .
- the drive train 11 includes an energy store 12, which is designed to supply the first and the second electric motor 21, 31 with electrical power.
- drive train 11 is designed to drive work machine 10 and work machines generally work under high drive loads and, in particular, produce comparatively high work performance in absolute terms
- drive train 11 according to the invention differs, for example, from a passenger car drive train, which typically operates in a capacity utilization range of 5% to 10% of the maximum output is operated and, in particular, performs less work in absolute terms.
- the energy store 12 must also provide a comparatively higher operating voltage than, for example, an energy store of an electrically operated passenger car drive train.
- the energy store 12 consists, for example, of two individual stores 12′, 12′′ electrically connected in series.
- the individual accumulators 12′, 12′′ are, for example, two individual accumulators 12′, 12′′ which are each designed to individually supply a passenger car drive train with electrical power.
- the required performance of the energy store 12 can thus be provided at significantly lower costs.
- Another advantage that results from the composition of the energy storage device 12 from two individual storage devices 12', 12" can be seen in the fact that the two individual storage devices 12', 12" can each be charged separately with electrical energy using an external charging device the duration of the charging process is significantly reduced overall.
- FIG. 2 shows, by way of example and schematically, a possible embodiment of a method according to the invention for operating a drive train 11 of a work machine 10 in the form of a flowchart.
- the drive train 10 comprises at least one electric motor 21, 31 and an electrical energy store 12.
- the Energy store 12 consists, for example, of at least two individual stores 12 ′, 12 ′′ electrically connected in series, which together represent the energy store 12 .
- a first method step 100 mechanical power is requested from the at least one electric motor 21, 31.
- the at least one electric motor 21 , 31 is then supplied with electrical power by the energy store 12 in method step 101 .
- the energy store 12 Since the energy store 12 consists of at least two individual stores 12′, 12′′ electrically connected in series, the electrical power is provided by all the individual stores 12′, 12′′ in essentially the same proportion.
- the at least one electric motor 21, 31 converts the electrical power into mechanical power, so that the at least one electric motor 21, 31 can now provide the requested mechanical power.
- the working machine 10 is then operated in method step 104 in stationary mode with reduced electrical power, whereby a first portion of the individual accumulators 12', 12" can be charged with electrical energy in step 104 via an external charging device, while at the same time in step 105 a second portion of the Individual stores 12', 12" continue to supply the at least one electric motor 21, 31 with electrical power.
- Vehicle wheel 0 request for mechanical power 1 supplying at least one electric motor with electrical power from the energy store 2 providing the mechanical power 3 determining the state of charge 4 charging an individual store 5 supplying at least one electric motor with electrical power from an individual store
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Sustainable Energy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020216269.7A DE102020216269A1 (de) | 2020-12-18 | 2020-12-18 | Antriebsstrang für eine Arbeitsmaschine, Verfahren zum Betreiben des Antriebsstrangs und Arbeitsmaschine |
| PCT/EP2021/084724 WO2022128667A1 (de) | 2020-12-18 | 2021-12-08 | Antriebsstrang für eine arbeitsmaschine, verfahren zum betreiben des antriebsstrangs und arbeitsmaschine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4263265A1 true EP4263265A1 (de) | 2023-10-25 |
Family
ID=79164881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21834766.4A Withdrawn EP4263265A1 (de) | 2020-12-18 | 2021-12-08 | Antriebsstrang für eine arbeitsmaschine, verfahren zum betreiben des antriebsstrangs und arbeitsmaschine |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20240003117A1 (de) |
| EP (1) | EP4263265A1 (de) |
| DE (1) | DE102020216269A1 (de) |
| WO (1) | WO2022128667A1 (de) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1309007B1 (it) | 1999-02-24 | 2002-01-15 | Vf Venieri S P A | Veicolo a trazione elettrica per movimento terra, particolarmente per luoghi mal areati. |
| US20110094807A1 (en) | 2009-10-26 | 2011-04-28 | Steve Pruitt | Electric drive system for passive vehicle |
| DE102010020576A1 (de) | 2010-05-14 | 2011-11-17 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Elektrisches Antriebssystem für ein Kraftfahrzeug |
| WO2012054617A1 (en) | 2010-10-19 | 2012-04-26 | Larry Nelson | Apparatus and method for charging and discharging a dual battery system |
| JP5662900B2 (ja) * | 2011-08-08 | 2015-02-04 | 日立建機株式会社 | 電動式建設機械 |
| DE102013102161B4 (de) | 2013-03-05 | 2025-10-09 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Schaltgetriebe zur Verwendung mit einer Elektromaschine |
| JP5824480B2 (ja) | 2013-06-07 | 2015-11-25 | ヤンマー株式会社 | 電動バックホー |
| DE202014000738U1 (de) | 2014-01-28 | 2014-03-06 | Weidemann GmbH | Radlader mit Energiespeichereinheit |
| US12252864B2 (en) * | 2018-04-06 | 2025-03-18 | Volvo Construction Equipment Ab | Working machine, a work attachment and a combination thereof |
| DE102018120063A1 (de) * | 2018-08-17 | 2020-03-05 | Keestrack N.V. | Offroad-Produktionslinie |
| DE102019109550A1 (de) | 2019-04-11 | 2020-10-15 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Modularer Fahrzeugaufbau und Montageverfahren |
| DE102019130739A1 (de) * | 2019-11-14 | 2021-05-20 | Audi Ag | Batterie mit einer Batteriezelle und Verfahren zu deren Betrieb |
-
2020
- 2020-12-18 DE DE102020216269.7A patent/DE102020216269A1/de not_active Ceased
-
2021
- 2021-12-08 WO PCT/EP2021/084724 patent/WO2022128667A1/de not_active Ceased
- 2021-12-08 US US18/257,880 patent/US20240003117A1/en active Pending
- 2021-12-08 EP EP21834766.4A patent/EP4263265A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE102020216269A1 (de) | 2022-06-23 |
| US20240003117A1 (en) | 2024-01-04 |
| WO2022128667A1 (de) | 2022-06-23 |
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