DE202009008569U1 - Electrically powered vehicle - Google Patents

Abstract

Electrically powered vehicle, comprising an electric motor (30), which is connected to a rechargeable energy storage (11, 21) and arranged at least one wind tunnel system (1) with a plurality of wind tunnels (2) equipped wind turbine substantially arranged in the front region of the vehicle a plurality, in each case in a wind tunnel (2) in the direction of travel successively arranged wind generators (3) through which the flow energy of the airstream into electrical, recharging the electric drive motor supplying energy storage (11, 21) usable energy is convertible, characterized in that each wind tunnel (2) of the wind tunnel system (1) is formed by a pipe-in-pipe construction in the form that both the pipe diameter and the length of the individual pipes (4.1, 4.2, 4.3) of the wind tunnel system (1) in the direction of the in the individual tubes (4.1, 4.2, 4.3) arranged wind generators (3) driving air flow gradually increased ert is.

Description

The The invention relates to a vehicle which is driven by an electric motor is driven and an electric motor supplying energy storage having. In the front area of the electrically driven vehicle a wind tunnel system is provided, wherein in each of the wind tunnels several wind generators are arranged.

The Wind generators convert the flow energy present in the airstream into electrical energy, which can be used, one or several, required for driving the vehicle energy storage to load.

Description of the state of technology

The Application of such electrically powered vehicles has been for some time known.

In An electric vehicle is the built-in, fully charged energy storage, preferably at least one lithium-ion accumulator, for a driving autonomy of approx. 250 km with a speed of approx. 100 km / h. After that or better before, the driver has to make sure that the built-in his car energy storage quickly be loaded or have a sufficient charge. The loading time is, according to a still-researched development technology, for an electrically driven vehicle of medium size approx. 4 to 6.5 hours

Because the charging of energy storage is currently very time consuming, Among other things, it can not be prevented that at "electric petrol stations" larger Form congestion. To remedy this problem, each would have to Petrol station provide very high number of electricity taps, but what structural reasons z. Z. only very rarely would be feasible.

The Travel times of electrically driven vehicles between start and destination will be significantly extended.

The Use of the flow energy of a moving vehicle with electric drive for charging the energy storage used essentially serves the purpose of the radius of action of these vehicles to enlarge and thereby the problem of "refueling" of At least partially reduce electric vehicle. simultaneously would thereby increase the acceptance of electrically driven Vehicles for transport tasks further increased.

such electrically powered vehicles are also in the Patent literature published.

By way of example, the following patent documents are mentioned:
DE 201 02 670 U1 and DE 20 2005 009215 U1 . CA 2 471 153 A1 respectively. U.S. Patent 3,374,849 . U.S. Patent 4,254,843 and U.S. Patent No. 6373,145 ,

Here electrically powered vehicles are described, which in Front area of the vehicle several wind tunnels for Have wind generators. The wind tunnels are in shape and / or Cross section formed differently and take either each one or more wind generators. When using multiple wind generators These are arranged one behind the other in the direction of travel.

Defects of the state of the technique

The Energy conversion systems described in the prior art for reloading the for the operation of the respective Drive motor of the electric vehicle required energy storage However, have the significant disadvantage that the fluidic Conditions within the wind tunnels either insufficiently taken into account or the form and / or the type of arrangement of the wind generators within the respective wind tunnel lead to undesirable turbulence got to.

About that in addition to those described in the patent literature Solutions in the direction of travel serial arrangement of Wind generators the respectively below arranged wind generators shaded by their arranged in the flow direction "predecessor".

Either Such turbulence as well as the above-described fluidic Shading of individual wind generators results in unacceptable Way to a significant deterioration in efficiency the energy conversion of flow energy into electrical energy Energy.

Theoretically This shortcoming could be caused, for example, by enlargement the used transducer system to be remedied, but what already due to the vehicle dimensioning outside of any realization possibility stands.

Explanation of the essence of the invention

Based on the deficiencies of the prior art, the present invention seeks to develop a wind tunnel system for an electrically powered vehicle in order to use the flow energy of the airstream to generate electrical energy to the effect that a higher efficiency of the energy conversion system is achieved by a functional design especially of the interior of the wind generators receiving the wind generators of the wind tunnel system.

The inventive solution is intended beyond that Means for the structural design and arrangement of Specify wind generators within each wind tunnel, thereby the flow characteristics of the entire wind tunnel system can be significantly improved.

These The object is achieved by the in the characterizing part of claim 1 described features solved. In the dependent claims Further, application-related clarifications are described.

Corresponding The preferred embodiment of the invention is anyone Wind tunnel of the wind tunnel system through a pipe-in-pipe construction formed in the form that both the pipe diameter and the length of the individual tubes counter to the direction of travel of the electrically driven vehicle stepped increases. The grading of the pipe diameter of the individual pipes is provided in such a way that at the free end of each internally arranged individual tubes in relation to the following, larger single tube an annular gap is created.

This Annular gap advantageously allows an additional Air flow for the next wind generator, by which its shading by the in the direction of travel electrically powered vehicle in front of him arranged wind generator can be compensated.

surprisingly Way, it was determined that the required uniform Flow of the wind generators arranged one behind the other is particularly favorable when the effective area the annular gap is essentially a value of 10 to 20 percent of Cross-sectional area of each subsequent, larger Single tube corresponds.

About that In addition, according to a further advantageous embodiment the invention provides that the number of rotor blades of the individual wind generators arranged serially in the wind tunnel - in Direction of the movement of the electrically driven vehicle resulting air flow - increased becomes. This can be a compensation for the relatively lower flow of - in relation on the direction of travel - rear wind generators achieved become.

surprisingly It has been found that this is a substantially even and quiet running of all used Wind generators can be reached.

Corresponding an additional advantageous embodiment provided for the invention, are for the attachment of Wind generators within the wind tunnels feet or the support rods provided. These have a flow turbulence reducing cross-section on. Conveniently these cross-sectional areas are substantially circular, oval or triangular shaped. Further fluidic Benefits are achievable if the oval or triangular Cross-sections to the inside rounded retracted boundary lines exhibit.

About that in addition, inside the feet and at least one of the support rods at least one channel for guidance a conduit for the supply of energy to the wind generators provided to be charged energy storage.

In In this context, it is also beneficial in the wind tunnel system the penetration of foreign bodies preventing protective grille and soundproofing agents.

Other advantageous developments of the invention are as features in the dependent claims or are hereinafter together with the description of the preferred embodiment of the invention with reference to the figures shown in more detail.

It demonstrate:

1a a preferred embodiment of the wind tunnel system according to the invention in sectional view,

1b an advantageous embodiment of the wind tunnel system according to the invention in sectional view,

1c an additional development of the wind tunnel system according to the invention in sectional view,

2 the front view of in 1a shown embodiment of the invention,

3 the simplified representation of a favorable form of a wind generator according to the in 1 illustrated invention,

4 a form of attachment of a 3 illustrated wind generator,

5a -B another advantageous form of attachment in 3 Windgenera shown tors,

6a C advantageous developments for a wind generator according to the in 1 illustrated invention,

7a -F additional developments for a wind generator according to the in 1 illustrated invention,

8th a further embodiment of the wind tunnel system according to the invention in a schematic partial representation

1

Wind tunnel system

2

single wind Tunnel

3, 3.1 to 3.3

wind generators

4, 4.1 to 4.3

individual tubes

5

annular gap

6

rotor blade of the wind generator

7, 7.1 to 7.6

Foot of the wind generator

8th

bracket

9.1 to 9.4

line connection

10

duct

11

first energy storage

12

holding strut of the wind generator

13

fastener

14

guard

15

medium for sound reduction

16.1 to 16.6

wall

17

guide rail

18

bolt

19

plate-shaped Support foot

20

Electronic module

21

second energy storage

22 23

conical end

30

electrical drive motor

In the 1a shown in schematic form a longitudinal section parallel to the direction of travel of the electrically driven vehicle of a preferred embodiment of the invention provides a wind tunnel system 1 with several wind tunnels 2 where the wind tunnels 2 arranged in two levels next to each other. Each of the individual wind tunnels 2 is by a tube-in-tube construction of three cylindrical single tubes 4.1 . 4.2 . 4.3 formed in the form that both the tube diameter and the length of the individual tubes 4.1 . 4.2 . 4.3 increased counter to the direction of travel of the electrically driven vehicle (or in the flow direction of the airstream) stepped.

In each wind tunnel are three identically constructed wind generators 3 provided, each wind generator 3 one of the individual pipes 4.1 . 4.2 . 4.3 assigned. The wind generators each have three rotor blades 6 They are going through a generator foot 7 essentially in the middle of the individual tubes 4.1 . 4.2 . 4.3 held. For fixing the generator feet 7 at the tube bottom are special brackets 8th intended.

The gradation of the pipe diameter of the individual pipes 4.1 . 4.2 . 4.3 is advantageously provided such that at the free end of each internally arranged individual tubes 4.1 . 4.2 . 4.3 in relation to the respectively following, larger single tube an annular gap 5 arises.

This ring gap 5 have the advantage that the wind for the arranged in the flow direction in the second and third row wind generators are divided into two components. As a result, the flow-shading of the wind generators arranged in the second and third rows is favorably achieved 3 largely compensated by the wind generator in front of them in each case in the direction of travel and achieved that the flow of the individual wind generators has substantially the same size.

1b shows the longitudinal section of another embodiment of the solution according to the invention in a schematic representation. The individual wind generators 3.1 . 3.2 . 3.3 differ with the same design and arrangement according to 1a by the number of rotor blades 6 ,

In the 1c schematically illustrated embodiment of the invention, the cylindrical individual tubes 4.1 . 4.2 . 4.3 the pipe-in-pipe system of the individual wind tunnels 2 conically shaped end regions 22 . 23 on. This results in an improved outflow behavior of the airstream from the corresponding annular channels 5 on the respectively below arranged wind generator 3 reached.

Other possible designs of the rotors of the wind generators with respect to the number of rotor blades 6 are in the 6a to 6c shown.

In 2 is the wind tunnel system according to the invention 1 from the front looking in the direction of the electric power generating wind flow shown in a simplified form. For reasons of clarity here are only the rotors of the wind generators 3.3 (Section plane A ... A according to 1 b) shown. The individual wind tunnels of the wind tunnel system 1 are with 2 and the individual tubes of the tube-in-tube construction according to the invention 4.1 . 4.2 . 4.3 designated.

At the end of these individual tubes are annular gaps according to the diameter graduation 5 intended.

This arrangement is particularly favorable when the area of the annular gaps 5 is substantially 5 to 20 percent relative to the respective closest larger single tube. This makes it possible in an advantageous manner that even at different speeds of the electrically powered vehicle, a substantially uniform flow of the individual wind generators 3 . 3.1 . 3.2 , and 3.3 can be done. In particular, by the intended in the direction of flow of the airstream increase the number of rotor blades 6 the wind generators 3.1 . 3.2 . 3.3 can be ensured that the rotational speed of the rotors is substantially equal even at variable speeds of the electrically driven vehicle. At the same time, this also reduces the equipment complexity in the distribution of the electrical energy generated by the wind generators in an advantageous manner.

The in 3 in a perspective view shown wind generator 3 has a pedestal 7 on, which at its free end by means of a holder 8th on the corresponding pipe of the wind tunnel system 1 is attached. Inside the stand 7 are channels 10 provided to power supply lines 9 (please refer 8th ). The wires 9 are to an electronic component 20 over which the rectification of the alternating voltage generated by the wind generators, their amplitude control and their feed takes place in the respective energy storage.

An advantageous form of attachment is in 4 shown schematically. The holder 8th has a dovetailed guide 17 on, in which the base 7 simple manner latching inserted.

The in the 5a and 5b described construction provides an alternative to the above-described form of attachment of the wind generators according to the invention 3 within a single tube 4 of the wind tunnel system 1 dar. The wind generator 3 is advantageously offset by three at an angle of 120 ° arranged holding struts 12 within the single tube 4 firmly anchored. At least one of the struts 12 has at least one (not shown) channel 10 on to the connecting lines 9 between wind generator 3 and, preferably, designed as Li-ion accumulators, energy storage record.

As shown in more detail in detail A, have the struts 12 at her the wall of the single tube 4 facing the end of a plate-shaped support foot 19 on, whose fixation on the inner wall of the single tube 4 through a bolt 18 he follows.

For turbulence and turbulence within the individual tubes 4.1 . 4.2 . 4.3 of the wind tunnel system 1 through the support elements 7 respectively. 12 reduce as far as possible, these support elements have a substantially kreisformig, oval or partially oval-like or triangular-shaped cross-sectional area. Advantageous variants for the support foot 7.1 to 7.6 a wind generator 3 are in the 7a to 7f shown in schematic form. An analogous design is also for the striving 12 meaningful, their cross-sectional areas each have similar boundary lines 16.1 to 16.6 exhibit.

As in the 7e and 7f shown, the boundary lines are partially retracted inward to further reduce the flow resistance.

8th shows a schematic representation of a portion of the energy conversion system for an electrically powered vehicle. The wind tunnels 2 of the wind tunnel system are each protective grille 14 which prevents foreign bodies from entering the energy conversion system and causing mechanical damage. Similarly, one on the inner wall of the individual tubes 4 Sound insulation lining 15 provided in order not to excessively increase the noise level in the electrically powered vehicle in operation.

The electrical connection of the example with three rotor blades 6 equipped wind generator 3 with the energy storage 11 . 21 via the in the channel 10 of the stand 7 guided tour 9.1 over the electronics module 20 , The feeding of the electric power generated by use of the flow energy in moving vehicle in the energy storage 11 . 21 and the switching of the energy storage for power supply of the drive motor 30 The vehicle is powered by an electronic component 20 implemented in a known manner suitable. The necessary line connections are with 9.2 . 9.3 and 9.4 designated.

The Solutions according to the invention are suitable for both for land as well as for air or water vehicles suitable, taking on the formation of the respective electrically driven Vehicle in the embodiments of this description has not been discussed in detail.

The invention is not limited in its execution to the above-mentioned preferred embodiments. Rather, a number of variants is conceivable, which of the illustrated solution even when fundamentally different gear used in various designs.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 20102670 U1 [0009]
• - DE 202005009215 U1 [0009]
• - CA 2471153 A1 [0009]
• US 3374849 [0009]
• - US 4254843 [0009]
• - US 6373145 [0009]

Claims (10)

Electrically powered vehicle, comprising an electric motor ( 30 ) which is connected to a rechargeable energy store ( 11 . 21 ) and a substantially in the front region of the vehicle arranged, at least one wind tunnel system ( 1 ) with several wind tunnels ( 2 ) equipped wind turbine with several, each in a wind tunnel ( 2 ) in the direction of travel successively arranged wind generators ( 3 ), by which the flow energy of the airstream into electrical, for recharging the electric drive motor supplying energy storage ( 11 . 21 ) usable energy, characterized in that each wind tunnel ( 2 ) of the wind tunnel system ( 1 ) is formed by a tube-in-tube construction in the form that both the tube diameter and the length of the individual tubes ( 4.1 . 4.2 . 4.3 ) of the wind tunnel system ( 1 ) in the direction of the in the individual tubes ( 4.1 . 4.2 . 4.3 ) arranged wind generators ( 3 ) driving air flow is gradually increased. Electrically driven vehicle according to claim 1, characterized in that the gradation of the pipe diameter of the individual pipes ( 4.1 . 4.2 . 4.3 ) is provided such that at the free end of a respective internally arranged single tube ( 4.1 . 4.2 ) with respect to the respective following, larger single tube ( 4.2 . 4.3 ) an annular gap ( 5 ) is formed with a cross-sectional area which corresponds to substantially 5 to 20 percent of the cross-sectional area of the respective larger individual tube. Electrically driven vehicle according to one of claims 1 or 2, characterized in that each of the individual tubes ( 4.1 . 4.2 . 4.3 ) by means of a stand ( 7 . 7.1 to 7.6 ) or by means of three by 120 ° offset holding rods ( 12 ) on the inner tube wall of the individual tubes ( 4.1 . 4.2 . 4.3 ) fixed wind generator ( 3 . 3.1 . 3.2 . 3.3 ) assigned. Electrically driven vehicle according to claim 3, characterized in that the feet ( 7 . 7.1 to 7.6 ) or the holding rods ( 12 ) each have a flow-turbulence reducing cross-sectional area ( 7.1 to 7.6 ) exhibit. Electrically driven vehicle according to claim 4, characterized in that the flow turbulence reducing cross-sectional areas ( 7.1 to 7.6 ) Is substantially circular, oval or triangular in shape. Electrically driven vehicle according to claim 5, characterized in that the oval or triangular cross-sectional areas ( 16.5 . 16.6 ) have rounded inside drawn-in boundary lines. Electrically powered vehicle according to one of claims 4, 5 or 6, characterized in that inside the stand 7 . 7.1 to 7.6 ) and at least one of the support rods ( 12 ) a channel ( 10 ) to lead a line ( 9.1 ) for the energy supply to the energy storage ( 11 . 21 ) is provided. Electrically driven vehicle according to one of the preceding claims, characterized in that the cylindrical individual tubes 4.1 . 4.2 the pipe-in-pipe system of the individual wind tunnels 2 conically tapered end regions 22 . 23 exhibit. Electrically driven vehicle according to one of the preceding claims, characterized in that in the wind tunnels ( 2 ) serially arranged wind generators ( 3.1 . 3.2 . 3.3 ) seen in the flow direction, an increase in the number of rotor blades ( 6 ) exhibit. Electrically driven vehicle according to one of the preceding claims, characterized in that in front of the wind tunnel system ( 1 ) the penetration of foreign bodies preventing protective grids ( 14 ) are provided and the inner walls of the individual tubes 4 . 4.1 . 4.2 . 4.3 of the wind tunnel system 1 Soundproofing agent ( 15 ) exhibit.