DE102009017553A1 - Energy storage i.e. battery, charging arrangement for electrically operable motor vehicle, has primary coil accommodated in unit, where unit includes bracket attached to housing part of unit, at which primary coil is attached - Google Patents

Abstract

The arrangement has a primary coil (41) inductively coupled to a secondary coil (40) provided in an electrically operable motor vehicle. The primary coil is accommodated in a unit, which is in a form of a pump pistol for refueling of the vehicle with a petrol engine. The primary coil has a cylindrical outer form, where axial length of the cylindrical outer form exceeds double of diameter of the cylindrical outer form. The unit includes a retaining bracket, which is attached to a housing part of the unit, at which the tap-like formed primary coil is attached. An independent claim is also included for a method for operating an arrangement for charging an energy storage of an electrically operable vehicle.

Description

The The invention relates to an arrangement for charging an energy store an electrically operable vehicle and a method

electrical operable vehicles have a battery, which usually means Charged a charger becomes. Here is the charger outside or arranged inside the vehicle.

Of the The invention is therefore based on the object of safety for people to increase when loading the vehicle.

According to the invention Task in the arrangement according to claim 1 or 2 and in the Method according to the features indicated in claim 14.

Important features of the invention in the arrangement for charging an energy store of an electrically operable vehicle are that a contactless energy transfer to the vehicle is carried out by a primary coil being inductively coupled to a secondary coil provided in the vehicle,
wherein the primary coil is housed in a unit that is substantially in the form of a fuel nozzle for refueling a gasoline powered vehicle,
in particular, wherein the unit comprises a retaining bracket which is attached to a housing part of the unit on which the pin-like executed primary coil is mounted.

From The advantage here is that a galvanic isolation is achieved and thus the operator better appreciated is. Furthermore becomes the primary part intuitive as a fuel nozzle as in gasoline powered vehicles recognized and thus to charge, the refueling in a gasoline powered Motor vehicle corresponds introduced in a recess, which is a tank opening of a gasoline-powered Motor vehicle similar looks at the bodywork.

Important features in the arrangement for charging an energy store of an electrically operable vehicle according to claim 2 are that a primary winding with a secondary winding is inductively coupled by the primary winding is insertable into a recess which is surrounded by the secondary winding,
wherein the primary coil is in the form of a cone, in particular substantially cylindrical. The advantage here is that a simple and easy insertion is possible.

at In an advantageous embodiment, the primary coil is attached to a housing part attached, on which also a retaining bracket is connected and in that also supplying the primary winding of the primary coil Primary conductor cable introduced is. The advantage here is that a central part is provided, not just the primary coil is attached but also at least one end of the retaining bracket and into that the primary conductor cable introduced is.

In an advantageous embodiment, the pin and the opening direction of the primary conductor cable in the housing part at an angle to each other to between 90 ° and 180 °, so do not run parallel. In particular, the pin and the opening direction of the primary conductor cable in the housing part at an obtuse angle to each other, in particular an angle between 90 ° and 180 °, ie not parallel and have no acute angle of less than 90 °,
and the headband on the outside, that is in the range of the outer angle of the more than 180 °, is provided, in particular wherein the headband is provided in the plane spanned by the pin and the mouthing direction. The advantage here is that the appearance of the shape of a fuel nozzle similar to gasoline refueling of a motor vehicle and thus the insertion into a recess which is similar to a tank opening, the operator intuitively made it clear.

at According to an advantageous embodiment, the primary coil has a ferrite core, the one-piece or composed of ferrite cores. The advantage here is that in small quantities Standard components are used and in mass production one-piece execution can be produced.

at According to an advantageous embodiment, the primary winding of the primary coil wound up the ferrite core, wherein subsequent to the axial ends of the primary the ferrite core extends radially into the radial region of the Primary winding. Especially For example, the ferrite core includes an axial portion that radially recesses is provided for receiving the primary winding. Is an advantage thereby providing a dog bone ferrite core is, to which the winding is easy and safe applicable.

In corresponding manner, the secondary winding is in a secondary side Ferrite core in particular as a ring winding inserted, the axial Has region that extends like a tube and its to the winding subsequent axial regions radially into the radial region of the secondary winding extend. In other words, the ferrite core is essentially the same a rotating body, the by rotation of a U about the winding axis of the secondary winding is generated, wherein the legs of the U directed radially inward are.

at an advantageous embodiment is the primary winding and secondary winding a ring winding. The advantage here is that a simple and inexpensive Production possible is.

at an advantageous embodiment, the ferrite core is a rotary body, the by rotation of a U whose legs are radially aligned, produced. The advantage here is that a simple production allows is and the winding is simply fixed in the axial direction.

at an advantageous embodiment is a sensor for detecting the introducing the primary coil provided in particular, wherein the sensor is a REED contact of a Permanent magnet triggered becomes. The advantage here is that a cost-effective and detection even at high durability and pollution can be ensured.

at an advantageous embodiment are means for contactless transmission provided by data, in particular by infrared or radio. Advantageous is there a sturdy transmission of data is, in particular in contrast to a modulation of higher frequencies Current shares on the primary current.

at In an advantageous embodiment, the primary coil has a jacket cooling, In particular, an inlet and an outlet is provided on the jacket of the primary coil. The advantage here is that a high power inductively transferable is and the plug connection coolable is.

at an advantageous embodiment is on the housing part a holding tube part or a Haltevollrohrteil attached to the ferrite core, in particular its Ferrite rings, are attached. The advantage here is that one easy production allows is because only ferrite cores on a tubular or cone-like part aufzustecken and are to be glued if necessary.

Important features in the method for operating an arrangement are that the insertion of the primary coil into the secondary coil is detected by means of a sensor whose sensor signal releases or switches on an electronic charging circuit in the vehicle so that the charging process is carried out,
wherein after release and / or turning on a corresponding information contactless, in particular by radio or infrared, is transmitted to an electronic device connected to the primary coil, so that the primary current is turned on only after receiving this information or brought to the current value for charging the energy store becomes.

From The advantage here is that, so to speak, a wake-up of the electronic Charging circuit of the vehicle is executable after plugging of the primary part. For this, however, an operability of the sensor is necessary So also a power supply for generating the sensor signal. alternative that would be Use of a sensor without voltage signal supply possible, such as For example, a Wiegandsensor whose sensor signal enough Energy includes to operate an electronic circuit.

In an advantageous embodiment, the energy store is a high-voltage battery voltage, in particular with a battery voltage of more than 200 volts,
and before receiving the information, a primary current is impressed into the primary winding, which is at least ten times lower than the value prescribed for charging the energy store, or such a primary current is impressed, charging a battery additionally provided for energy storage in the low-voltage battery, for example, 12 volts or 24 volt battery, possible. The advantage here is that from the energy storage of the drive can be supplied and from the low-voltage battery an emergency power supply for the control electronics of the vehicle is also possible in case of failure or emptying of the energy storage. Now, if the low-voltage battery should be emptied, a charging of the same would be possible by the fact that the small charging current is generated for this, ie with low voltage. Thus, the safety is ensured and the low-voltage battery is rechargeable. As soon as it is sufficiently charged, then the awakening and / or switching on the other electronic circuit is possible, which then returns this condition without contact to the electronic circuit supplying the primary conductor. In response, the current and voltage are then increased so that the charging of the energy store with high voltage, ie more than 100 volts or 200 volts, or a correspondingly high current occurs.

Further Advantages emerge from the subclaims.

1

Primary conductor cable

2

headband

3

housing part

4

primary coil

5

recess

6

housing part

7

outlet for cooling medium

8th

electric wire for secondary-sided electricity

40

secondary winding

41

primary

42

ferrite

43

ferrite

44

secondary side electronic arrangement

45

primary side electronic arrangement

46

Holding tube part

47

inlet for cooling medium

The Invention will now be explained in more detail with reference to figures:

In 1 the primary-side and the secondary-side connector part is shown in the pulled-out state.

In 2 is also shown a pulled out state.

In 3 the plugged state is shown.

In 4 is one too 3 proper cut shown.

In the inserted state is a primary winding 41 the primary-side connector part inductively to a secondary winding 40 the secondary-side connector part shown.

The primary current is converted to the primary winding by means of the lines covered by the primary conductor cable 41 fed. This is on a ferrite core 42 wound, which is ideally or substantially embodied as a rotational body which is formed by rotation of a U spaced from the axis of rotation, the legs of which point radially away from the axis of rotation.

For fast and easy production is the ferrite core 42 built of ferrite rings, which on the holding ear part 46 be plugged so that the shape of the rotation body described is only approximately achieved. Alternatively, the ferrite core 42 also in one piece

The Winding axis of the primary winding is parallel to the mentioned axis of rotation and is so to speak received in a radial recess of the ferrite core.

The ferrite core 42 is a holding ear part 46 provided around it, so surrounds this, and is then with this with a axially spaced from the primary winding housing part 3 connected to which a headband 2 is provided.

The primary-side connector part is in a recess 5 the secondary-side connector part inserted, whereby a very good inductive coupling of the primary winding 41 with the secondary winding 40 is reachable.

About the primary conductor cable 1 becomes a medium frequency current in the primary winding 41 imprinted, in particular with a frequency between 10 and 500 kHz. The secondary winding 40 is a capacity connected in series or in parallel, that the associated resonant frequency substantially corresponds to the center frequency.

The primary side Connector part has an overall appearance that a filler neck of a Tank system for Passenger cars, so gasoline powered street Motor vehicles, is modeled.

Consequently It is easy and quick to use for loading an electric operable motor vehicle. Because the operator recognizes in by refueling his Gasoline powered motor vehicle the function of the connector immediately. He knows thus instinctively so that the connector part in a corresponding Recess to introduce the body of the electric vehicle.

The secondary side Connector part has a flange for attachment to the body of the electric vehicle. Thus, externally a certain similarity to the tank opening a petrol-powered vehicle and thus the use instinctively clear.

Despite the good inductive coupling, however, heat generation in the connector is unavoidable. Therefore, an inlet 47 for a cooling medium, in particular water or air, which opens into channels which extend in the circumferential direction and into an outlet 7 for the cooling medium. Thus, the connector is connectable to the cooling circuit in the vehicle. Preferably, the cooling medium in this cooling circuit is driven by a pump.

The secondary side current gets on the cable 8th taken out and led to an electronic circuit that makes the energy storage, especially battery, the vehicle loadable.

The secondary winding 40 is in the ferrite core 43 provided, whereby the substantial part of the magnetic field from the ferrite core 43 to the ferrite core 42 is feasible over a small air gap and thus a very strong coupling can be achieved.

At the axial end portion of the primary coil and its ferrite core is a primary-side electronic device 45 provided the means of data exchange with one at the end of the recess 5 arranged secondary side electronic device 46 in a non-contact manner, for example by infrared, radio or ultrasound. In this way, data is low-interference or interference-free transferable, since this data transfer unab is executable by the inductive energy transfer between the primary coil and the secondary coil.

Of Further is a primary side arranged sensor provided with the detection of the primary side Connector part after complete Plug-in executable is. For example, this is a REED contact usable, the one on the primary side Connector part provided permanent magnet makes detectable when it enters the sensitive area of the sensor. Also alternative Sensors, such as proximity sensors or corresponding sensors, can be used.

Consequently is after detection of the primary-side connector part switching on the secondary side electronic circuits executable.

In further embodiments of the invention, the holding tube part 46 executed on aluminum or plastic. It is also possible to use a fully filled part instead of a pipe part.

Claims (15)

Arrangement for charging an energy store of an electrically operable vehicle, characterized in that a non-contact energy transfer to the vehicle is carried out by a primary coil is inductively coupled to a provided in the vehicle secondary coil, wherein the primary coil is accommodated in a unit which is substantially in the form of a A fuel nozzle for refueling a vehicle with a gasoline engine is used, in particular wherein the primary coil has a cylindrical outer shape, wherein the axial length of the cylinder exceeds twice the diameter of the cylinder, in particular wherein the unit comprises a headband, which is attached to a housing part of the unit at which is also mounted the pin-like executed primary coil. Arrangement for charging an energy store of a electrically operable vehicle, characterized, that a primary winding with a secondary winding inductively coupled by the primary winding into a recess insertable is that of the secondary winding is surrounded, the primary coil cone-shaped, in particular substantially cylindrical, is formed. Arrangement according to at least one of the preceding Claims, characterized in that the primary coil on a housing part is attached to which a retaining bracket is connected and in the also the primary winding supplying the primary coil Primary conductor cable is inserted. Arrangement according to at least one of the preceding Claims, characterized in that the pin and the confluence direction of the primary conductor cable in the housing part have an angle to each other between 90 ° and 180 °, so do not run parallel. Arrangement according to at least one of the preceding Claims, thereby marked that the pin and the direction of confluence of the primary conductor cable in the housing part have an obtuse angle to each other, in particular an angle between 90 ° and 180 °, so not parallel and not having an acute angle of less than 90 °, and the headband on the outside, ie in the area of the outside angle of more than 180 °, is provided, in particular wherein the headband in the pin and the confluence direction level provided for. Arrangement according to at least one of the preceding Claims, characterized in that the primary coil has a ferrite core, the one-piece or composed of ferrite cores. Arrangement according to at least one of the preceding Claims, characterized in that the primary winding of the primary coil the ferrite core is wound, wherein subsequent to the axial ends of the primary the ferrite core extends radially into the radial region of the Primary winding. Arrangement according to at least one of the preceding Claims, characterized in that the ferrite core has an axial region includes, which is provided radially recessed for receiving the primary winding. Arrangement according to at least one of the preceding Claims, characterized in that the primary winding and secondary winding a ring winding is. Arrangement according to at least one of the preceding Claims, characterized in that the ferrite core is a body of revolution, by rotating a U, whose legs are radially aligned are, is producible. Arrangement according to at least one of the preceding claims, characterized in that a sensor for detecting the insertion of the primary coil is provided, in particular wherein the sensor is a REED contact of a duration magnets is triggered. Arrangement according to at least one of the preceding Claims, characterized in that means for non-contact transmission are provided by data, in particular by infrared or radio. Arrangement according to at least one of the preceding Claims, thereby marked that the primary coil has a jacket cooling, in particular, an inlet and an outlet provided on the jacket of the primary coil is and / or that on the housing part a holding tube part or a Haltevollrohrteil is fixed, on which the ferrite core, in particular his ferrite rings, are attached. Method for operating an arrangement after at least one of the preceding claims, thereby marked that the insertion of the primary coil in the secondary coil is detected by a sensor whose sensor signal is an electronic Charging circuit in the vehicle releases or turns on, so that the Charging completed becomes, wherein after release and / or turn on a corresponding Information contactless, in particular by radio or infrared, is transmitted to a with the primary coil connected electronic arrangement, so that the primary current only is switched on after receiving this information or on the to Charging the energy store is given predetermined current value. Method according to claim 14, characterized, that the energy store is a high-voltage battery voltage, in particular with a battery voltage of more than 200 volts, and before receiving the information, a primary current in the primary winding imprinted which is at least ten times less than that for loading the Energy storage predetermined value, or such a primary current is impressed, the loading of an additional for the energy storage in the vehicle provided low-voltage battery, for example, 12 volts or 24 volt battery.