DE102020207218A1 - Charging station for an electrically powered vehicle - Google Patents

Abstract

The invention relates to a charging station for charging an electrically operated vehicle (2), with a charging cable (1) which can be plugged into the vehicle (2) via its charging plug (3), the charging station having a cable pull system with a cable (13), the charging cable (1) is suspended from its cable end, the cable (13) being able to be wound up on a winding drum (20) which is spring-loaded in a winding direction, so that when the charging cable (1) is transferred from a storage position to a use position, the cable (13) is unwound from the winding drum (20) in a pull-out movement (z) and is wound onto the winding drum (20) in a pull-in movement when the charging cable (1) is transferred from the use position to the storage position. According to the invention, the cable pull system has an electronic control unit (21) with at least one actuator (23, 25, 27), by means of which an electric motor assistance takes place when handling the charging cable.

Description

The invention relates to a charging station for charging a traction battery of an electrically operated vehicle according to the preamble of claim 1 and a method for operating such a charging station according to claim 14.

A wall-mounted, mobile charging station or a charging station implemented as a charging station has a charging cable with a charging plug that can be plugged into the electrically operated vehicle for the charging process. The comparatively rigid copper charging cable must have a certain cable length in order to ensure flexible handling of the charging cable. The cable length can in turn lead to the charging cable twisting or coming into contact with the floor during the charging process and soiling.

A generic charging station has a cable pull system with a rope, at the end of which the charging cable is suspended. The rope can be wound onto a winding drum that is spring-pretensioned in one winding direction. Correspondingly, the charging cable can be unwound from the winding drum in a pull-out movement when it is transferred from a storage position to a use position. Conversely, when the charging cable is transferred from the use position to the storage position, the charging cable can be wound onto the winding drum. Such a charging station is from the DE 10 2017 113 224 A1 known.

From the DE 10 2010 061 892 A1 , from the DE 10 2011 051 052 A1 other charging stations are known. From the DE 10 2011 109 414 A1 a charging cable device is known.

The object of the invention is to provide a charging station for charging an electrically operated vehicle, in which the handling of the charging cable is more convenient with technically simple means compared to the prior art.

The object is achieved by the features of claim 1 or 14. Preferred developments of the invention are disclosed in the subclaims.

According to the characterizing part of claim 1, the cable system on which the charging cable is suspended has an electronic control unit with at least one actuator. With the help of the actuator, there is electromotive support when handling the charging cable. The actuator can be at least one rotary drive motor controllable by the control unit, with which at least one deflection roller and / or the winding drum of the cable pull system can be driven. In addition, the actuator can be a parking brake controllable by the control unit, by means of which the cable can be mechanically fixed in its retraction end position and / or its extension end position and / or in any cable position in between.

With the control unit according to the invention, rope movement profiles can be sensed during handling of the charging cable. On the basis of a recorded cable movement profile, the control unit can generate precise electromotive support for handling the charging cable. For this purpose, the control unit has at least one movement sensor which detects an inward and / or outward movement of the cable, a cable holding time and a cable pull-out time. In addition, at least one tension sensor can be assigned to the control unit. While the user is handling the charging cable, this can detect a tensile force applied by the user to the cable via the charging cable. In general, pressure switches, optical sensors, torque sensors, Hall sensors or the like can be used as sensors.

• In einem ersten Seil-Bewegungsprofil erfolgt aufgrund einer nutzerseitigen Ladekabel-Handhabung eine Seil-Auszugbewegung. Die Seil-Auszugbewegung ist mit einer vom Nutzer bewirkten Ladekabel-Auszugbewegung bewegungsgekoppelt. Die Seil-Auszugbewegung wird von den Sensoren erfasst, die entsprechende Signale zur Steuereinheit leiten.

The following is an example of cable movement profiles or states that occur during charging cable handling and can be detected by the control unit by means of sensors in order to support charging cable handling with an electric motor:

• In a first cable movement profile, a cable pull-out movement occurs due to the user handling the charging cable. The movement of the cable pull-out is coupled with a movement of the charging cable that is pulled out by the user. The cable pull-out movement is recorded by the sensors, which transmit the corresponding signals to the control unit.

If such a cable pull-out movement is detected by sensors, the control unit generates a pull-out signal as a manipulated variable for the rotary drive motor in order to support the cable pull-out movement with an electric motor.

In a further rope movement profile, the rope stops in a holding position (possibly in the extension end position) in the course of the rope pull-out movement and remains in this holding position for a holding period without any further pull-in or pull-out movement. This case arises when the user stops pulling out the charging cable, i.e. the user no longer actively pulls on the charging cable, but merely holds it tight. After the holding period has elapsed, the rope pull-out movement is continued for a pull-out period. According to the invention, both the holding time and the pull-out time are recorded by sensors and processed by means of signals in the control unit. If there is a moving-out period less than / equal to one in the The control unit recognizes a short-term pull-out movement impulse generated by the user. This results when the user briefly pulls out the charging cable and then lets it go (i.e. pushing it).

Such a push is assessed by the control unit as a pull-in aid requirement on the part of the user. Correspondingly, the control unit generates a pull-in signal for the rotary drive motor in order to support a cable pull-in movement with an electric motor or to activate an automatic cable pull-in movement.

In contrast, if the pull-out time is greater than the minimum pull-out time, the control unit generates a pull-out signal as a manipulated variable for the rotary drive motor in order to support a further pull-out movement of the cable with an electric motor. This case occurs when, after the hold time has elapsed, the user pulls out the charging cable for a long time or continuously pulls on the charging cable.

The control unit can also be used to monitor and process the holding time period, recorded by sensors, during which the rope remains in the holding position, as well as signal processing: If the holding time period is greater than a minimum holding period stored in the control unit, a parking mode is activated in which the control unit detects a parking position -Signal for the parking brake generated to mechanically fix the rope in the holding position.

In a further rope movement profile, the rope stops in a holding position in the course of a rope pull-in movement and remains there without any further pull-in or pull-out movement for a holding period that can be detected by sensors. Analogous to the above-mentioned movement profile, the control unit works with the following control logic: For example, if the holding time is greater than the minimum holding time, the control unit activates the above parking mode, in which the parking brake is actuated. In the event that a cable pull-out movement occurs after the holding time has elapsed, the control unit works with the following control logic: If the pull-out time is less than or equal to a minimum pull-out time (pushing) stored in the control unit, the control unit generates a pull-in signal for the rotary drive motor to support a rope pull-in movement with an electric motor.

On the other hand, if the pull-out time is greater than the minimum pull-out time, the control unit generates a pull-out signal for the rotary drive motor in order to support a further pull-out movement of the cable with an electric motor.

In a draw-in end position, the rope can be completely wound up on the winding drum (that is, completely drawn in), and can be pulled out over a draw-out path until it reaches a draw-out end position. When the retraction end position and / or the extension end position are present, the control unit can generate a parking signal for the parking brake in order to mechanically fix the cable. In addition, the control unit can generate a deceleration signal for the rotary drive motor when the retraction end position is reached and / or when the extension end position is reached in order to decelerate the retraction or extension movement shortly before the retraction end position or the extension end position, whereby a mechanical stress on the cable system is reduced.

Exemplary embodiments of the invention are described below with reference to the accompanying figures.

• 1 eine Ladestation;
• 2 ein Seilzugsystem der Ladestation mit zugeordneter Steuereinheit;
• 3 ein Blockschaltbild, anhand dem eine Ladekabel-Handhabung veranschaulicht ist;
• 4 in einer Ansicht entsprechend der 3 ein weiteres Blockschaltbild, anhand dem Seil-Bewegungsprofile während der Ladekabel-Handhabung veranschaulicht sind;
• 5 und 6 jeweils weitere Ausführungsvarianten der Erfindung.

Show it:

• 1 a charging station;
• 2 a cable system of the charging station with an associated control unit;
• 3 a block diagram showing a charging cable handling is illustrated;
• 4th in a view corresponding to the 3 a further block diagram, on the basis of which rope movement profiles are illustrated during the handling of the charging cable;
• 5 and 6th further variants of the invention.

In the 1 a wall-mounted charging station is shown, which is implemented as a wallbox. The charging station is only indicated to the extent that it is necessary to understand the invention. As a result, the charging station has a copper charging cable that is rigid to a certain extent 1 with a charging plug 3 during a charging process on an electrically powered vehicle 2 is attachable, as indicated in dashed lines. As from the 1 further shows is the charging cable 1 in a loop-like riser on an elastically flexible cable suspension 7th held. The cable suspension 7th is part of a cable system with pulleys 11 over which a rope 13th is led. At the end of the rope there is a suspension element 15th that at a connection point A. stationary on the charging cable 1 is connected. The connection point A. shares the charging cable 1 into a charging cable section leading away from the charging station 17th and into a free charging cable section 19th at the free end of the charging plug 3 is trained. The rope 13th is on a winding drum 20th wound which is spring-biased in a winding direction.

The charging cable 1 is in the 1 in the position of use (dashed line) with his Charging plug 3 on the electrically powered vehicle 2 infected. When the user transfers the charging cable 1 the charging plug is in the position of use 3 from the user in the direction of electrically powered vehicles 2 drawn. This will make the rope 13th while building up a restoring force F _R around a pull-out path from the winding drum 20th settled. After the charging process has been completed, the vehicle user releases the charging plug 3 from the vehicle 2 , making the charging cable 1 while reducing the restoring force F _R can be returned to its custody position.

The rope is in the charging cable storage position 13th in its end-of-travel position pmin (or "home position" in the 4th ), in which it is completely drawn in or from the winding drum 20th is wound up. Starting from the draw-in end position pmin can the rope 20th via a pull-out path to a pull-out end position p _max be pulled out (or from the winding drum 20th be processed).

As from the 2 shows, the cable system is a control unit 21 assigned. By means of the control unit 21 can while handling the charging cable (see block diagram of 3 ) Rope movement profiles (see block diagram of 4th ) can be detected by sensors. The control unit generates on the basis of the cable movement profile recorded in each case 21 a precise electromotive support, by means of which the ease of use is increased during the handling of the charging cable. For this purpose, the electronic control unit 21 in the 2 Rotary drive motors 23 , 25th , a parking brake 27 as well as motion, tension and position sensors assigned, of which in the 2 just a motion sensor 29 is indicated.

• So beginnt die Ladekabel-Handhabung mit einer vom Fahrzeugnutzer initiierten Ladekabel-Auszugbewegung, die mit einer Seil-Auszugbewegung (z > 0) einhergeht. Die Seil-Auszugbewegung (z > 0) wird vom Bewegungssensor 29 erfasst, der ein entsprechendes Bewegungssignal zur Steuereinheit 21 leitet. Bei Vorliegen einer solchen Seil-Auszugbewegung erzeugt die Steuereinheit 21 ein Auszug-Signal S_A für den Drehantriebmotor 23, 25, um die Seil-Auszugbewegung (z > 0) elektromotorisch zu unterstützen.

The following is how the control unit works 21 described during charging cable handling based on charging cable movement profiles ( 3 ) as well as correlating rope movement profiles ( 4th ) that occur during charging cable handling:

• Charging cable handling begins with a charging cable pull-out movement initiated by the vehicle user, which starts with a cable pull-out movement ( z > 0). The rope pull-out movement ( z > 0) is from the motion sensor 29 detected, which sends a corresponding movement signal to the control unit 21 directs. When such a cable pull-out movement occurs, the control unit generates 21 an extract signal S _A for the rotary drive motor 23 , 25th to set the rope pull-out movement ( z > 0) to be supported by an electric motor.

While handling the charging cable, the vehicle user can use the charging cable 1 Hold it in place in any charging cable pull-out position or in the pull-out end position. In both cases, the pull-out movement (which correlates with the charging cable pull-out movement) z of the rope 13th stopped in a holding position and the rope remains 13th without further moving in or out over a holding period t _h in the holding position ("hold position" in the 4th ) or in the pull-out end position.

The control unit 21 records the holding time t _h sensory and processes them in terms of signaling as follows: If there is a hold time t _h larger than one in the control unit 21 stored minimum holding time t _p activates the control unit 21 a parking mode ("Parking" in the 4th ) with a locking signal S _F for the parking brake 27 is generated to the rope 13th in the holding position ("hold position" in the 4th ) to be fixed mechanically.

After the hold time has elapsed t _h the user can use the charging cable 1 continue to pull out with a pulling force, causing the rope pull-out movement z over a period of move-out t continues. The control unit 21 records the user-side on the charging cable 1 and thus also on the rope 13th applied tensile force sensory. When such a tensile force is present, the control unit releases 21 the parking brake 27 . The control unit also records 21 the further duration of the move-out t sensory and processes this signal-wise.

If there is a move-out period t less than / equal to one in the control unit 21 stored minimum pull-out period t _z recognizes the control unit 21 a brief pull-out movement impulse generated by the vehicle user (pushing). In this case the control unit generates 21 a move-in signal S _E for the rotary drive motors 23 , 25th to support a rope pull-in movement with an electric motor.

If there is a move-out period t greater than the minimum pull-out period t _z generates the control unit 21 on the other hand a pull-out signal S _A for the rotary drive motors 23 , 25th to make the rope pull-out movement z support by electric motor.

From the 3 and 4th a rope movement profile is also possible, in which the rope is pulled in during the course of a rope pull-in movement 13th is stopped in a holding position and there without any further retraction or extension movement over a sensor-recorded holding period t _h in the holding position ("hold position" in the 4th ) remains. The duration of the hold t _h is from the control unit 21 sensed by sensors and processed there by signaling as follows: If there is a hold time t _h greater than a minimum holding time stored in the control unit t _p generates the control unit 21 a locking signal S _F for the parking brake 27 to the rope 13th to be mechanically fixed in the holding position.

• Bei Vorliegen einer Auszugzeitdauer t kleiner/gleich der in der Steuereinheit 21 hinterlegten Mindest-Auszugzeitdauer t_p (Anrucken) erzeugt die Steuereinheit 21 ein Einzug-Signal S_E für die Drehantriebmotoren 23, 25, um eine Seil-Einzugbewegung elektromotorisch zu unterstützen. Bei Vorliegen einer Auszugzeitdauer t größer als die Mindest-Auszugzeitdauer t_p erzeugt die Steuereinheit 21 ein Auszug-Signal S_A für die Drehantriebmotoren 23, 25, um eine Seil-Auszugbewegung z elektromotorisch zu unterstützen.

After the hold time has elapsed t _h the user can use the charging cable 1 continue to pull out with a pulling force, causing the rope pull-out movement z over a period of move-out t continues. The control unit 21 records the user-side on the charging cable 1 and thus also on the rope 13th applied tensile force sensory. When such a tensile force is present, the control unit releases 21 the parking brake 27 . The control unit also records 21 the further duration of the move-out t sensory and processes them in terms of signal technology as follows:

• If there is a move-out period t less than / equal to that in the control unit 21 stored minimum pull-out period t _p The control unit generates (pushing) 21 a move-in signal S _E for the rotary drive motors 23 , 25th to support a rope pull-in movement with an electric motor. If there is a move-out period t greater than the minimum pull-out period t _p generates the control unit 21 an extract signal S _A for the rotary drive motors 23 , 25th to make a rope pull-out movement z support by electric motor.

The control unit 21 can when the retraction end position is present p _min and / or the pull-out end position p _max and / or any rope position p a locking signal S _F for the parking brake 27 generate to the rope 13th to fix mechanically. If there is a user-side on the charging cable 1 and with it on the rope 13th applied tensile force can be controlled by the control unit 21 the parking brake 27 release to allow the rope to move in or out again 13th to enable.

In addition, the control unit 21 when the end position is reached pmin and / or pull-out end position p _max a brake signal S _B for the rotary drive motors 23 , 25th generate to slow down the pull-in or pull-out movement.

In the 5 and 6th further variants of the invention are indicated. As a result, drifts in the 5 the rotary drive motor 23 a single pulley 11 while in the 6th the rotary drive motor 23 the winding drum 20th drives.

List of reference symbols

1

Charging cable

2

electrically powered vehicle

3

Charging plug

7th

Cable suspension

11th

Pulleys

13th

rope

15th

Suspension element

17, 19

Charging cable sections

A.

Connection point

FR

Restoring force

20th

Winding drum

21

Control unit

23, 25

Rotary drive motors

27

Parking brake

29

Position sensor

z

Rope pull-out movement caused by the user

p

Rope position

t

Pull-out time within which the user pulls the cable

tz

Minimum time to move out

th

Hold time

tp

Minimum holding time for parking or parking brake

pmin

Draw-in end position

pmax

Extension end position

SA

Extract signal

SE

Move-in signal

SF

Locking signal

SB

Brake signal

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102017113224 A1 [0003]
• DE 102010061892 A1 [0004]
• DE 102011051052 A1 [0004]
• DE 102011109414 A1 [0004]

Claims (14)

Charging station for charging an electrically operated vehicle (2), with a charging cable (1) which can be plugged into the vehicle (2) via its charging plug (3), the charging station having a cable pull system with a cable (13) on whose cable The end of the charging cable (1) is suspended, the rope (13) being able to be wound onto a winding drum (20) that is spring-biased in a winding direction, so that when the charging cable (1) is transferred from a storage position to a use position, the cable (13) is in a pull-out movement (z) is unwound from the winding drum (20) and, when the charging cable (1) is transferred from the use position to the storage position, is wound onto the winding drum (20) in a pull-in movement, characterized in that the cable system has an electronic control unit (21 ) with at least one actuator (23, 25, 27), by means of which an electric motor assistance takes place when handling the charging cable. Charging station after Claim 1 , characterized in that the actuator is at least one rotary drive motor (23, 25) controllable by the control unit (21), with which at least one deflection roller (11) and / or the winding drum (20) of the cable pull system can be driven. Charging station according to one of the preceding claims, characterized in that the rope (13) is completely drawn in or completely wound up in a draw-in end position (p _min ) and can be pulled out over an extension path until it reaches an end position (p _max ). Charging station after Claim 3 , characterized in that in the event of a cable pull-in movement shortly before reaching the pull-in end position (p _min ), the control unit (21) generates a braking signal for the rotary drive motor (23, 25) in order to decelerate the cable pull-in movement, or that at a cable pull-out movement shortly before reaching the pull-out end position (p _max ) the control unit (21) generates a braking signal for the rotary drive motor (23, 25) in order to decelerate the cable pull-out movement. Charging station after Claim 3 or 4th , characterized in that the actuator is a parking brake (27) controllable by the control unit (21), by means of which the cable (13) can be mechanically fixed _{in its retraction end position (p min} ) or in any extended position (p, p _max) is. Charging station according to one of the preceding claims, characterized in that by means of the control unit (21) at least one rope movement profile can be detected during the charging cable handling, and that the control unit (21) provides electromotive support for the Charging cable handling generated. Charging station according to one of the preceding claims, characterized in that the control unit (21) is assigned at least one movement sensor (29) with which an inward and / or outward movement of the rope (13) can be detected, and / or that the control unit (21 ) at least one pull sensor is assigned, with which a pulling force applied by the user to the cable (13) can be detected during the charging cable actuation, and / or that the control unit (21) is assigned at least one position sensor with which a cable pull-out position ( p) is detectable. Charging station after Claim 7 , characterized in that in a cable movement profile there is a movement-coupled cable extraction movement (z) with a charging cable extraction movement, which can be detected by the movement sensor (29), and / or that when the cable extraction movement (z) is present, the control unit ( 21) generates a pull-out signal (S _A ) for the rotary drive motor (23, 25) in order to support the cable pull-out movement (z) with an electric motor. Charging station after Claim 7 or 8th , characterized in that in a rope movement profile in the course of a rope pull-out movement (z) the rope (13 _{) stops in a holding position ("hold position") or in the pull-out end position (p min} ), and the rope (13 ) without input or extraction movement over a holding time (t _h) in the holding position ( "position hold"), or in the pull-out end position (p _max) remains, and that in particular after the expiry of the holding time (t _h), the cable-pull-out movement ( z) is continued over a pull-out time period (t), and that the control unit (21) _{senses the hold time period (t h} ) and the pull-out time period (t) and processes them using signals, and that if there is a pull-out time period (t) less than / equal to an in the control unit (21) stored minimum pull-out duration (t _z ) the control unit (21) recognizes a brief pull-out movement impulse ("pushing") generated by the user and a pull-in signal (S _E ) for the rotary drive motor (23, 25) generated to elec to support the motor. Charging station after Claim 9 , characterized in that, if there is a pull-out time (t) greater than the minimum pull-out time (t _z ), the control unit (21 _{) generates a pull-out signal (S A} ) for the rotary drive motor (23, 25) to effect a pull-out movement of the cable (z) to assist with an electric motor. Charging station after Claim 9 or 10 , characterized in that if a holding time period (t _h ) is greater than one in the evaluation unit (21) stored minimum holding time (t _P ) the control unit (21) _{generates a parking signal (S F} ) for the parking brake (27) to the rope (13) in a parking mode ("parking") in the holding position ("hold position." “) To be fixed mechanically. Charging station according to one of the Claims 4 until 9 , characterized in that in a rope movement profile in the course of a rope pull-in movement, the rope (13) stops in a holding position ("hold position") and without any further inward or outward movement over a sensor-detectable holding period (t _h ) in the holding position remains, and that if there is a holding time (t _{h ) greater than a minimum holding time (t p} ) stored in the control unit (21), the control unit (21 _{) generates a parking signal (S F} ) for the parking brake (27), to mechanically fix the rope (13) in the holding position. Charging station after Claim 12 , characterized in that in the rope movement profile after the holding time period (t _h ) has elapsed, a rope pull-out movement (z) over a pull-out time period (t) follows, and that if there is a pull-out time period (t) less than / equal to one in the control unit ( 21) stored minimum pull-out duration (t _z ), the control unit (21) detects a brief pull-out movement impulse ("pushing") generated by the user and generates a pull-in signal (S _E ) for the rotary drive motor (23, 25) in order to to support a rope pull-in movement with an electric motor. Method for operating a charging station according to one of the preceding claims.

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