JP5790561B2 - Vehicle charging device - Google Patents

Description

  The present invention relates to a vehicle charging device that charges a vehicle having a storage battery that stores electric power for traveling, and more particularly to a vehicle charging device provided in a parking facility having a mobile pallet on which a vehicle is loaded.

  2. Description of the Related Art In recent years, vehicles that include an electric motor as a driving source for travel and run by driving the electric motor with electric power stored in a storage battery are becoming popular. In this type of vehicle, the distance that can be traveled by one charge tends to be shorter than the distance that can be traveled by one refueling in a vehicle that uses volatile oil such as gasoline as fuel. There is a problem that charging takes a long time. Then, the mechanical parking lot provided with the charging device which charges with respect to the parked vehicle is proposed (for example, refer patent documents 1, 2).

  The mechanical parking lots described in Patent Documents 1 and 2 include a plurality of pallets on which vehicles are loaded, and when the pallets are fixed to a predetermined parking shelf, the electrical contacts provided on the pallet and the parking shelf are provided. The vehicle is configured to be able to be charged by being connected to the electrical contacts.

JP 2011-63944 A JP 2010-222793 A

  In such a mechanical parking lot, if the pallet is moved while the vehicle is being charged, the contacts may be separated while being energized, and a spark may occur between the contacts. When a spark is generated, the contact performance deteriorates due to damage to the contact plating. Further, on the vehicle side, the storage battery may be damaged due to the backflow of the residual charge and the charge performance may be deteriorated.

  It is possible to cut off the charging current on the charging device side of the parking lot before starting the movement of the pallet so that no spark is generated between the contacts when the pallet moves. However, even in this case, the storage battery of the vehicle may be damaged. The same is true for the existence.

  Accordingly, an object of the present invention is to provide a vehicular charging device capable of suppressing the occurrence of sparks and damage to a storage battery at the time of moving a pallet loaded with the vehicle during charging of the vehicle. To do.

In order to solve the above-mentioned problems, the present invention is provided in a pallet on which a vehicle having a storage battery for storing electric power for traveling can be loaded, and a parking facility provided with a moving means for moving the pallet. Charging means for supplying a charging current to the storage battery, and charging current reducing means for reducing the amount of charging current drawn to the vehicle based on a signal related to the start of movement of the pallet , the charging means, A plurality of fixed side contacts fixed to a support that movably supports the pallet, a plurality of moving side contacts fixed to the pallet, a vehicle side connector provided in the vehicle, and the vehicle side The charging current is supplied to the vehicle via a charging cable interposed between a connector and the plurality of moving side contacts, and the charging current reducing means Output from one of a plurality of terminals provided on the vehicle-side connector before the connection between the plurality of fixed-side contacts and the plurality of moving-side contacts is interrupted with the start of movement of the pallet. A vehicle charging device that reduces the amount of charging current drawn to the vehicle by changing a resistance value with respect to the current is provided.

  The charging current reducing unit may receive a signal related to the movement start of the pallet via the fixed contact and the moving contact, and change the resistance value based on the received signal.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to suppress generation | occurrence | production of the spark in the contact at the time of moving the pallet with which the said vehicle was loaded during charge of a vehicle, and damage to a storage battery.

It is the schematic which shows the outline | summary of the mechanical parking equipment provided with the charging device for vehicles which concerns on the 1st Embodiment of this invention. It is a functional block diagram which shows the schematic function structure of the mechanical parking equipment and the charging device for vehicles provided in this mechanical parking equipment. It is a schematic block diagram of the vehicle in a charged state. The charging gun is shown, (a) is a general view, (b) is a schematic diagram showing the arrangement of the connection terminals of the connector part. It is a circuit diagram which shows circuit structures, such as a charging control part, a switching control circuit, and the charging circuit in a vehicle. It is a circuit diagram which shows the circuit structure of the charging gun according to the standard of SAEJ1772 with circuit structures, such as a charging circuit in a vehicle. It is a circuit diagram which shows the circuit structural examples, such as a charge control part of the charging device for vehicles which concerns on 2nd Embodiment, and a switching control circuit. It is a circuit diagram which shows circuit structural examples, such as a charge control part of the charging device for vehicles which concerns on 3rd Embodiment, and a switching control circuit.

[First Embodiment]
FIG. 1 is a schematic view showing an outline of a mechanical parking facility provided with a vehicle charging device according to a first embodiment of the present invention.

  This mechanical parking facility 1 includes a plurality of (four) pallets 11 on which a vehicle 9 can be loaded, a support 12 that supports the plurality of pallets 11, a lift 13 that moves each pallet 11 in the vertical direction, a lift Control of the 1st drive device 131 which moves 13 to the vertical direction, the 2nd drive device 132 which moves the pallet 11 loaded on the lift 13 to horizontal direction, and the 1st and 2nd drive devices 131 and 132 And a control panel 14 for performing the above.

  The lift 13, the first driving device 131, and the second driving device 132 are examples of the “moving means” in the present invention. The mechanical parking facility 1 is an example of the “parking facility” in the present invention.

  The support 12 includes a plurality of columns 121, a plurality of beams 122, and a roof 123. In the present embodiment, the support 12 is provided with two left and right parking shelves 12a and 12b in the first floor portion and two left and right parking shelves 12c and 12d in the second floor portion. In FIG. 1, some of the columns 121 and the roof 123 are indicated by a two-dot chain line, and the vehicle 9 and the like on the other side are indicated by a solid line.

  The lift 13 is moved in both the up and down directions between the descending end position 1a between the parking shelf 12a and the parking shelf 12b and the rising end position 1b between the parking shelf 12c and the parking shelf 12d by the first driving device 131. Can be moved to. The lift 13 loads the pallet 11 on the upper surface 13a and moves the loaded pallet 11 in the vertical direction.

  The second drive device 132 is provided on the lift 13 and moves up and down integrally with the lift 13. The second driving device 132 moves the pallet 11 loaded on the upper surface 13a by a moving mechanism (not shown) in both the left and right directions along the horizontal direction.

  The control panel 14 is installed on the ground, for example, and includes an operation panel 141 for receiving user instructions. The control panel 14 controls the first and second driving devices 131 and 132 based on the instruction content received through the operation panel 141. More specifically, the control panel 14 controls the first driving device 131 by supplying electric power for moving the lift 13 to the first driving device 131. Further, the control panel 14 controls the second driving device 132 by supplying electric power for moving the pallet 11 to the second driving device 132.

  For example, when the user of the vehicle 9 enters the vehicle 9 at the descending end position 1a which is the loading / unloading position and operates the operation panel 141, the control panel 14 moves the pallet 11 loaded with the vehicle 9 to the parking racks 12a to 12d. Move to an empty parking shelf. When the pallet 11 is moved to the parking shelf 12d, the first drive device 131 is controlled to raise the lift 13 from the lowered end position 1a to the raised end position 1b, and then the second drive device 132 is controlled. Then, the pallet 11 is moved in the horizontal direction (the arrow direction in FIG. 1). Thereby, the pallet 11 loaded with the vehicle 9 moves to the parking rack 12d. Further, when the vehicle 9 on the parking shelf 12d is delivered, the pallet 11 is moved from the parking shelf 12d to the entry / exit position in the reverse procedure.

  The pallet 11 is provided with a support 110 at the corner. A case 111 that accommodates a switching control circuit 2 described later is fixed to the column 110. In addition, one end of the charging cable 112 is fixed to the case 111, and a charging gun 113 is provided at the other end of the charging cable 112. In the example shown in FIG. 1, a charging gun 113 is connected to the vehicle 9 loaded on the pallet 11 that is moving to the parking shelf 12d. The vehicle 9 is a vehicle having a storage battery that stores electric power for traveling. In order to distinguish it from the vehicle 9 loaded on the other pallet 11, the vehicle 9 will be described as a vehicle 9A with different symbols for convenience.

  Each pallet 11 is provided with a plurality (four) of moving side contacts 114a to 114d on a contact unit 114 fixed to the lower surface thereof. On the other hand, a contact unit 115 having a plurality of (four) fixed side contacts 115a to 115d provided at positions facing the moving side contacts 114a to 114d is fixed to the support 12 on the parking racks 12a to 12d, respectively. ing. In FIG. 1, only the contact unit 115 provided on the parking shelf 12d is shown.

  The movement side contacts 114 a to 114 d are connected to the switching control circuit 2 in the case 111 by wires (not shown) fixed to the pallet 11. The fixed side contacts 115 a to 115 d are connected to the control panel 14 by unillustrated wiring fixed to the support 12.

  When the movement of the pallet 11 to the parking racks 12a to 12d is completed, each of the moving side contacts 114a to 114d comes into contact with each of the fixed side contacts 115a to 115d and is electrically connected. The moving side contacts 114a and 114b and the fixed side contacts 115a and 115b are single-phase AC200V contacts. Among them, the moving contact 114a and the fixed contact 115a are L-phase contacts, and the moving contact 114b and the fixed contact 115b are N-phase (neutral phase) contacts. The moving contact 114c and the fixed contact 115c are GND phase contacts. The moving contact 114d and the fixed contact 115d are contact points of signal lines connected to a fitting detection terminal described later.

  The vehicle 9A is in a state where it can receive the supply of the charging current output from the control panel 14 by the contact between the moving side contacts 114a to 114d and the fixed side contacts 115a to 115d.

  FIG. 2 is a functional block diagram illustrating a schematic functional configuration of the mechanical parking facility 1 and the vehicle charging device 10 provided in the mechanical parking facility 1.

  The control panel 14 includes an operation panel 141 that receives a user instruction, a movement control unit 142 that controls movement of the pallet 11 by the first and second driving devices 131 and 132, and a vehicle 9A loaded on the pallet 11. And a charging control unit 3 that controls charging.

  Commercial power is supplied to the control panel 14 through a power line (not shown), and this commercial power is distributed to the operation panel 141, the movement control unit 142, and the charge control unit 3.

  The movement control unit 142 supplies power to the first and second driving devices 131 and 132 in response to an instruction to enter or leave the vehicle 9 from the operation panel 141, and moves the pallet 11 to a predetermined position. Move to. Further, the movement control unit 142, when the movement of the pallet 11 to any of the parking racks 12a to 12d is completed at the time of warehousing, and when the pallet 11 is moved from any of the parking racks 12a to 12d at the time of warehousing, A signal indicating this is output to the charging control unit 3.

  When the charging to the vehicle 9A is instructed by the operation panel 141, the charging control unit 3 receives a signal indicating that the movement of the pallet 11 to any of the parking racks 12a to 12d is completed from the movement control unit 142. Thereafter, a charging current is supplied to the vehicle 9A via the contact unit 114, the contact unit 115, the switching control circuit 2, the charging cable 112, and the charging gun 113.

  The charging control unit 3, the contact unit 114, the contact unit 115, the switching control circuit 2, the charging cable 112, and the charging gun 113 constitute the vehicle charging device 10.

  FIG. 3 is a schematic configuration diagram of the vehicle 9A in a charged state. The vehicle 9 </ b> A is supplied with a charging current via the switching control circuit 2 housed in the case 111 fixed to the column 110 while being loaded on the pallet 11. The switching control circuit 2 can switch the supply line of the charging current to the vehicle 9A to a cut-off state (a state where no charging current is output to the vehicle 9A) and a connected state (a state where the charging current can be output to the vehicle 9A).

  The vehicle 9A includes a vehicle-side connector 91 that is fitted to the charging gun 113, a charging circuit 92 that is connected to a connection terminal of the vehicle-side connector 91, a control device 93 that controls the charging circuit 92, a storage battery 94, and a storage battery 94. The inverter 95 outputs the electric power stored in the motor as a drive current switched by PWM (Pulse Width Modulation) control, the electric motor 96 that receives supply of the drive current from the inverter 95, and the output of the electric motor 96 is shifted to the front wheel 98. A transmission 97 for transmission is mounted on the vehicle body 90.

  The electric motor 96 is a driving source for traveling the vehicle 9A, and is, for example, an IPM (Interior Permanent Magnet Motor). The storage battery 104 is, for example, a lithium ion battery or a nickel metal hydride battery.

  In addition to the electric motor 96, the vehicle 9A may be a plug-in hybrid vehicle that includes an internal combustion engine (engine) that uses volatile oil such as gasoline as a fuel as a drive source. Alternatively, a rear wheel drive vehicle that transmits the output of the transmission 97 to the rear wheels 99 may be used.

  4A and 4B show the charging gun 113, where FIG. 4A is an overall view, and FIG. 4B is a schematic diagram showing the arrangement of connection terminals of the connector portion.

  The charging gun 113 has a main body portion 113a, an engaging projection 113b, a release button 113c, and a connector portion 113d. The engagement protrusion 113b engages with an engagement recess (not shown) provided in the vehicle 9A by fitting the vehicle-side connector 91 and the connector portion 113d, and prevents the vehicle-side connector 91 and the connector portion 113d from being detached. . Further, the engagement protrusion 113b is interlocked with the pushing operation of the release button 113c, and the engagement with the engagement recess is released. The connector portion 113d is connected to the charging cable 112 in the main body portion 113a.

  The connector portion 113d has a housing 113e, a pair of charging terminals L and 113g that output a voltage for charging the vehicle 9A, an N terminal 113g, an electrically grounded GND terminal 113h, and charging control. A C terminal 113 i as a terminal and a P terminal 113 j as a fitting detection terminal for detecting fitting with the vehicle-side connector 91 are provided.

  FIG. 5 is a circuit diagram illustrating circuit configurations of the charging control unit 3, the switching control circuit 2, and the charging circuit 92 in the vehicle 9A.

The charge control unit 3 includes a control circuit 30, a relay circuit 31, and a switching circuit 32, a resistor _{R 33,} and _{R 34.} When the control circuit 30 receives a signal indicating that the movement of the pallet 11 to any of the parking racks 12a to 12d from the movement control unit 142 is completed, the control circuit 30 energizes the coil 31c of the relay circuit 31 and The first contact part 31a and the second contact part 31b are turned on (closed state). Thereby, single-phase AC200V of commercial power appears at the fixed side contacts 115a and 115b of the contact unit 115. The configurations of the switching circuit 32 and the resistors R ₃₃ and R ₃₄ will be described later.

Switching control circuit 2 includes a control unit 20, a relay circuit 21, and a current sensor 22, and a resistor _{R 23.} The control unit 20 includes, for example, a CPU (Central Processing Unit) that operates according to a program stored in advance and its peripheral circuits.

  The control unit 20 controls on / off of the relay circuit 21. The relay circuit 21 includes a first contact portion 21a, a second contact portion 21b, and a coil 21c for operating the first contact portion 21a and the second contact portion 21b. Is supplied, the first contact portion 21a and the second contact portion 21b are turned on (closed state), and when no current is supplied to the coil 21c, the first contact portion 21a and the second contact portion 21b are turned off. (Open state).

  The first contact portion 21 a of the relay circuit 21 is provided between the moving contact 114 a of the contact unit 114 and the L terminal 113 f of the charging gun 113. The second contact portion 21 b is provided between the moving contact 114 b of the contact unit 114 and the N terminal 113 g of the charging gun 113. Thereby, when the 1st contact part 31a and the 2nd contact part 31b of the relay circuit 31 of the charge control part 3 are an ON state (closed state), the 1st contact part 21a and the 2nd contact part 21b of the relay circuit 21 are In the on state (closed state), the charging current is supplied to the vehicle 9A. The relay circuit 31 and the relay circuit 21, and the control circuit 30 and the control unit 20 that control ON / OFF of these are examples of the “charging means” in the present invention.

  A current sensor 22 is provided on the wiring between the first contact portion 21a and the L terminal 113f. The current sensor 22 is composed of, for example, a Hall element sensor, detects a current output from the L terminal 113f, and outputs a detection signal indicating the current value to the control unit 20.

  Further, the control unit 20 has a communication function of transmitting information such as an allowable current value of the charging current to the vehicle 9A side by a pulse signal that is PWM (Pulse Width Modulation) controlled. A transmission signal from the control unit 20 is output from the C terminal 113i of the charging gun 113 to the vehicle 9A side via the communication resistor Rc. The control unit 20 can monitor the voltage on the C terminal 113i side of the communication resistor Rc.

  This communication resistor Rc is for performing communication with a vehicle that complies with SAEJ1772 which is an international standard that defines communication specifications between the charging device side and the vehicle side. Even when 9A is not completely compliant with this standard and communication via the communication resistor Rc cannot be performed, it is possible to reduce the amount of charging current drawn into the storage battery 94 with respect to the vehicle 9A. Therefore, illustration and description of the content of the communication and the configuration for performing communication on the vehicle 9A side are omitted.

The vehicle-side connector 91 has a first terminal 911, a second terminal 912, a third terminal 913, a fourth terminal 914, and a fifth terminal 915. When the connector 113d of the charging gun 113 is fitted to the vehicle-side connector 91, the first terminal 911 is the L terminal 113f, the second terminal 912 is the N terminal 113g, the third terminal 913 is the GND terminal 113h, and the fourth terminal 914 is connected to the C terminal 113i, and the fifth terminal 915 is connected to the P terminal 113j. A resistor R ₉₁ is connected between the third terminal 913 and the fifth terminal 915. In the present embodiment, the resistance value of the resistor R ₉₁ is 2700Ω.

The charging circuit 92 includes a rectifying circuit unit 921, a current control unit 922, a DC power source 923, a switch 924, and a resistor R ₉₂ .

  The rectifier circuit unit 921 is connected to the first terminal 911 and the second terminal 912 of the vehicle-side connector 91. The rectifier circuit unit 921 rectifies the alternating current input from the first terminal 911 and the second terminal 912 and outputs the rectified current to the current control unit 922. The rectifier circuit unit 921 is formed of, for example, a diode bridge circuit. Note that an inrush current limiting circuit or a smoothing circuit for limiting an inrush current at the start of charging may be further provided between the rectifier circuit portion 921 and the current control portion 922.

  The current control unit 922 adjusts the charging current output to the storage battery 94 in accordance with a control signal from the control device 93. The current control unit 922 has a plurality of stages of electrical resistance from a non-resistance state that substantially short-circuits the rectifier circuit unit 921 and the storage battery 94 to a high resistance state that reduces the charging current to the storage battery 94 to, for example, 1 A or less It can be changed steplessly.

The resistance value of the resistor R ₉₂ is, for example, 330Ω. The output voltage of the DC power supply 923 is 5V, for example. The output voltage of the DC power supply 923 is applied to the resistor R ₉₂ via the switch 924. On / off of the switch 924 is controlled by the control device 93. For example, the control device 93 turns on (short-circuits) the switch 924 when the ignition of the vehicle 9A is on or during charging, and turns off (cuts off) the switch 924 in other cases.

Resistor R ₉₂ is connected in series with resistor R ₉₁ . One end of the resistor R ₉₁ is connected to the reference potential (ground potential) of the charging circuit 92. Further, the control device 93 has a built-in voltmeter capable of measuring the potential between the resistor R ₉₂ and the resistor R ₉₁ , and the current I ₁ flowing through the resistor R ₉₂ can be obtained by this potential.

  Here, for comparison, a circuit configuration of a charging gun according to the standard of SAEJ1772 will be described. The charging gun 113 in the present embodiment is a modification of the circuit configuration in the standard of SAEJ1772.

  FIG. 6 is a circuit diagram showing a circuit configuration of a charging gun according to the standard of SAEJ1772, together with a circuit configuration of the charging circuit 92 and the like in the vehicle 9A.

  The charging gun 113A includes a switch 113k, a resistor 113m, and a resistor 113n in addition to an L terminal 113f, an N terminal 113g, a GND terminal 113h, a C terminal 113i, and a P terminal 113j. The configuration other than the switch 113k, the resistor 113m, and the resistor 113n is the same as that of the charging gun 113. The resistor 113m and the resistor 113n are connected in series between the GND terminal 113h and the P terminal 113j, and the switch 113k is connected in parallel to the resistor 113m on the GND terminal 113h side. In the standard of SAEJ1772, the resistance value of the resistor 113m is set to 330Ω, and the resistance value of the resistor 113n is set to 150Ω.

The switch 113k has a pair of contacts that are short-circuited when the release button 113c (see FIG. 4) is not pushed in. When the release button 113c is pushed-in, conduction between the pair of contacts is interrupted. That is, the resistance value between the GND terminal 113h and P terminals 113j, if not considering the resistor _{R 91,} when the release button 113c has not been pushed is 150 ohms (resistance value of the resistor 113n), release When the button 113c is pressed, 480Ω (150Ω + 330Ω) is obtained. Considering the resistance value (2700Ω) of the resistor R _91, the resistance value between the GND terminal 113h and the P terminal 113j is about 142Ω when the release button 113c is not pushed in, and the release button 113c. Is pushed to approximately 408Ω. Further, if the charging gun 113A is not connected to the vehicle-side connector 91, the resistance value is 2700Omu (resistance value of the resistor _{R 91).}

This change in resistance value is detected by the controller 93 as a change in the current I ₁ flowing through the resistor R ₉₂ . That is, the control device 93 measures the potential between the resistor R ₉₂ and the resistor R ₉₁ to determine whether or not the charging gun 113A is fitted to the vehicle-side connector 91, and the charging gun 113A is fitted. When the release button 113c is pressed, it is possible to detect whether or not the release button 113c is pressed.

On the other hand, in the present embodiment, the charging gun 113 does not include circuit parts corresponding to the switch 113k, the resistor 113m, and the resistor 113n. Instead, the charging control unit 3 uses the switching circuit 32 and the resistor. R ₃₃ and R ₃₄ are provided.

  As shown in FIG. 5, the switching circuit 32 includes a first contact 32a, a second contact 32b, a third contact 32c, and a coil 32d. The coil 32d is connected to the control circuit 30, and the control circuit 30 can switch the connection state between the first contact 32a and the second contact 32b or the third contact 32c by energization or non-energization of the coil 32d. When the coil 32d is not energized, the first contact 32a and the second contact 32b are connected, and when the coil 32d is energized, the first contact 32a and the third contact 32c are connected.

The first contact 32 a is connected to the fixed contact 115 d of the contact unit 115. A resistor R ₃₃ is connected between the second contact 32 b and the reference potential (ground potential) of the charging control unit 3. Between the second contact 32b side and the third contact 32c of the resistor _{R 33,} the resistor _{R 34} is connected. The resistance value of the resistor R ₃₃ is 150Ω, and the resistance value of the resistor R ₃₄ is 330Ω.

  As shown in FIG. 5, in the present embodiment, the P terminal 113j of the charging gun 113 and the moving contact 114d of the contact unit 114 are connected (short-circuited) via the charging cable 112 and the switching control circuit 2. .

When the moving side contacts 114a to 114d of the contact unit 114 and the fixed side contacts 115a to 115d of the contact unit 115 are not in contact, the current output from the fifth terminal 915 of the vehicle side connector 91 is the charge control unit 3 side. The resistance value between the fifth terminal 915 and the reference potential in the vehicle-side connector 91 is 2700Ω (resistance value of the resistor R ₉₁ ).

When the moving contact 114d of the contact unit 114 and the fixed contact 115d of the contact unit 115 are in contact with each other and the coil 32d is not energized, the current output from the fifth terminal 915 of the vehicle side connector 91 is charged. 112, movable contact 114d of the contact unit 114, and flows through the resistor _{R 33} of the charge control unit 3 via the fixed contact 115d of the contact unit 115, the fifth terminal 915 and the charge control unit 3 of the vehicle-side connector 91 The resistance value with respect to the reference potential is 150Ω.

When the moving contact 114d of the contact unit 114 and the fixed contact 115d of the contact unit 115 are in contact with each other and the coil 32d is energized, the current output from the fifth terminal 915 of the vehicle-side connector 91 is a resistor. The resistance value between the fifth terminal 915 of the vehicle-side connector 91 and the reference potential of the charging control unit 3 is 480Ω through the R ₃₃ and the resistor R ₃₄ .

As described above, the path of the current output from the fifth terminal 915 of the vehicle-side connector 91 is switched by energizing or de-energizing the coil 32d, and the resistance value with respect to this current is changed. As a result, the current I ₁ flowing through the resistor R ₉₂ changes. The amount of change in the current I ₁ is equal to the amount of change in current I ₁ when the release button 113c is pushed in the charging cancer 113A. Therefore, the charging control unit 3 can cause the control device 93 of the vehicle 9A to recognize that the release button 113c of the charging gun 113A has been pressed by energizing the coil 32d by the control circuit 30.

  The control device 93 of the vehicle 9A is configured to control the current control unit 922 so as to reduce the amount of charging current drawn when the release button 113c is pressed. This is because, when the release button 113c is pushed in, the charging gun 113A is likely to be pulled out from the vehicle-side connector 91 immediately after that, and the charging gun 113A is pulled out from the vehicle-side connector 91 while the charging current is energized. In order to avoid this, a spark may occur between the L terminal 113f and the first terminal 911 and between the N terminal 113g and the second terminal 912, which may damage these terminals. is there.

  In the present embodiment, when the pallet 11 loaded with the vehicle 9A is in any of the parking racks 12a to 12d, the charging gun 113 is not actually pulled out from the vehicle-side connector 91, and the pallet loaded with the vehicle 9A. 11 is moved to the loading / unloading position, in consideration of the fact that the supply of the charging current has already been stopped due to the separation of the contact unit 114 and the contact unit 115, the charge control unit 3 as if the release button The vehicle 9A is made to recognize that 113c has been pushed in, and the amount of charging current drawn is reduced.

  The control circuit 30 receives a signal related to the movement start of the pallet 11 in any of the parking racks 12a to 12d (hereinafter, this signal is referred to as a “movement start signal”) from the movement control unit 142 on the mechanical parking equipment 1 side. Then, the coil 32d is energized based on this movement start signal. This movement start signal is a signal output from the movement control unit 142 before the movement of the pallet 11 by the first and second drive devices 131 and 132 is started, and indicates that the movement of the pallet 11 is started. It is. Thereby, prior to the start of movement of the pallet 11, before the connection of the fixed side contacts 115a to 115d and the plurality of movement side contacts 114a to 114d is interrupted with the start of movement of the pallet 11, the vehicle 9A is The amount of charging current drawn can be reduced. The movement control unit 142 outputs a movement start signal, and then a predetermined time (for example, 3 seconds) elapses after the movement start signal is output so that the movement of the pallet 11 is started after the charging current is reliably reduced. Then, the movement of the pallet 11 may be started.

The control circuit 30, the switching circuit 32, and the resistors R ₃₃ and R ₃₄ are an example of the “charging current reducing unit” in the present invention.

(Operation and effect of the first embodiment)
According to the first embodiment described above, before the connection between the fixed side contacts 115a to 115d and the plurality of moving side contacts 114a to 114d is interrupted by the movement of the pallet 11 from the parking racks 12a to 12d, Since the charging current supplied to the vehicle 9A, that is, the charging current flowing between the plurality of fixed side contacts 115a to 115d and the plurality of moving side contacts 114a to 114d can be reduced, the fixed side contacts 115a to 115d and the plural It is possible to suppress the generation of sparks at the moving side contacts 114a to 114d, and it is possible to suppress damage to the storage battery 94 due to the backflow of residual charges.

  In the present embodiment, since the path of the current output from the fifth terminal 915 of the vehicle-side connector 91 is switched by the switching circuit 32 and the resistance value is changed, the release button 113c is pushed into the control device 93 of the vehicle 9A. A circuit for recognizing that it has been operated can be realized with a simple configuration with a small number of parts.

[Second Embodiment]
Next, a vehicle charging device 10A according to a second embodiment of the present invention will be described with reference to FIG. FIG. 7 is a circuit diagram showing circuit configurations of the charging control unit 3 and the switching control circuit 2 of the vehicle charging apparatus 10A according to the present embodiment. In FIG. 7, elements having the same functions as those described in the first embodiment are denoted by the same reference numerals, and redundant description thereof is omitted.

  In the first embodiment, the switching circuit 32 that switches the path of the current output from the fifth terminal 915 of the vehicle-side connector 91 is provided in the charge control unit 3, but in this embodiment, the switching control circuit 2 is used to switch the path of the current output from the fifth terminal 915 of the vehicle-side connector 91. The operation of the switching circuit 23 is controlled by the control unit 20. The control unit 20 receives a movement start signal indicating that the movement of the pallet 11 is started via the fixed side contact 115d and the movement side contact 114d, and controls the switching circuit 23 based on the movement start signal. Hereinafter, these configurations will be described in detail.

  The charging control unit 3 includes a signal source 33 and a switching circuit 34 that is switched and controlled by the control circuit 30. The switching circuit 34 includes a first contact 34a, a second contact 34b, a third contact 34c, and a coil 34d. The coil 34d is connected to the control circuit 30, and the control circuit 30 can switch the connection state between the first contact 34a and the second contact 34b or the third contact 34c by energization or non-energization of the coil 34d. When the coil 34d is not energized, the first contact 34a and the second contact 34b are connected, and when the coil 34d is energized, the first contact 34a and the third contact 34c are connected. The first contact 34a is connected to the fixed contact 115d. The second contact 34 b is connected to the reference potential (ground potential) of the charge control unit 3. The third contact 34 c is connected to the signal source 33.

  The signal source 33 outputs a DC or AC voltage signal or current signal as a transmission signal. In the present embodiment, it is assumed that the signal source 33 always outputs a transmission signal while commercial power is being supplied to the charging control unit 3.

  When the control circuit 30 receives a movement start signal indicating that the pallet 11 is moved from any of the parking shelves 12a to 12d, the control circuit 30 energizes the coil 34d, and the third contact 34c and the first contact 34a of the switching circuit 34 Is connected. Thereby, the transmission signal of the signal source 33 is transmitted to the control unit 20 of the switching control circuit 2 through the fixed contact 115d and the moving contact 114d.

  The switching circuit 23 includes a first contact 23a, a second contact 23b, a third contact 23c, and a coil 23d. The coil 23d is connected to the control unit 20, and the control unit 20 can switch the connection state between the first contact 23a and the second contact 23b or the third contact 23c by energization or non-energization of the coil 23d. When the coil 23d is not energized, the first contact 23a and the second contact 23b are connected, and when the coil 23d is energized, the first contact 23a and the third contact 23c are connected.

The first contact 23 a is connected to the P terminal 113 j of the charging gun 113. A resistor R ₂₄ is connected between the second contact ₂₃ b and the reference potential (ground potential) of the switching control circuit 2. Between the second contact 23b side and the third contact 23c of the resistor _{R 24,} the resistor _{R 25} is connected. The resistance value of the resistor R ₂₄ is 150Ω, and the resistance value of the resistor R ₂₅ is 330Ω.

  With this configuration, when the control circuit 30 receives the movement start signal, the transmission signal of the signal source 33 is transmitted to the control unit 20, and the control unit 20 performs switching control of the switching circuit 23 based on the transmission signal, so that the vehicle side The path of the current output from the fifth terminal 915 of the connector 91 is switched. As a result, the vehicle 9A recognizes that the release button 113c has been pressed, and reduces the amount of charging current drawn.

(Operation and effect of the second embodiment)
According to the present embodiment, the same operations and effects as the operations and effects described in the first embodiment can be obtained. In addition, since the path of the current output from the DC power source 923 of the charging circuit 92 is shorter than that in the first embodiment, the voltage due to the routing of the wiring can be achieved even in a large-scale mechanical parking facility. The descent is suppressed, and the amount of charging current drawn into the vehicle 9A can be reliably reduced.

  Note that the voltage and current of the signal source 33 can be higher than the voltage of the DC power supply 923 (for example, 12V, 24V, or 100V) without being limited by the standard of SAEJ1772, etc. Even if the signal is attenuated, the control unit 20 can accept the transmission signal.

[Third Embodiment]
Next, a vehicle charging device 10B according to a third embodiment of the present invention will be described with reference to FIG. FIG. 8 is a circuit diagram showing circuit configurations of the charging control unit 3 and the switching control circuit 2 of the vehicle charging device 10B according to the present embodiment. In FIG. 8, elements having the same functions as those described in the first and second embodiments are denoted by the same reference numerals, and redundant description thereof is omitted.

  In the present embodiment, signals are transmitted and received between the control circuit 30 and the control unit 20 by communication, and the contact units 114 and 115 are connected to the moving contacts 114d and 114e and the fixed contacts 115d and 115d that relay this communication. The configuration having 115e is different from that of the second embodiment.

  The control circuit 30 and the fixed side contacts 115d and 115e are connected by communication lines 35a and 35b. Further, the control unit 20 and the movement side contacts 114d and 114e are connected by communication lines 24a and 24b. The communication lines 35a and 35b and the communication lines 24a and 24b are, for example, twisted pair lines, and transmit the transmission signal of the control circuit 30 to the control unit 20 by differential.

  According to the present embodiment, the same operations and effects as those described in the second embodiment can be obtained.

  While the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the claims. In addition, it should be noted that not all the combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

  The present invention is not limited to the first to third embodiments, and can be implemented in various modes without departing from the gist thereof. For example, the mechanical parking facility 1 is not limited to that illustrated in FIG. 1, and various types of structures such as a rotary type in which a plurality of pallets rotate simultaneously can be used. In the first to third embodiments, the case where the switching control circuit 2 and the charging gun 113 are provided on all of the plurality of pallets 11 has been described. However, the switching control circuit 2 and A charging gun 113 may be provided. In the third embodiment, communication between the control circuit 30 and the control unit 20 is not limited to wired communication using the communication lines 24a and 24b and the communication lines 35a and 35b, and electromagnetic waves, ultrasonic waves, and the like are used. The wireless communication used may be used.

  Moreover, although each said embodiment demonstrated the case where the movement side contacts 114a-114d and the fixed side contacts 115a-115d were connected and interrupted | blocked by the movement of the pallet 11, it is not restricted to this, For example, charge control The part 3 and the switching control circuit 2 may be always connected by a cable without passing through these contact points, and the pallet 11 may be moved by bending the cable while maintaining this connection state. In this case, by reducing the charging current when the pallet 11 is moved, the peak value of the power consumption of the mechanical parking lot including the vehicle charging device can be suppressed. That is, when power is supplied to the drive device for moving the pallet 11, power consumption for charging the vehicle is suppressed, so that the overall power consumption of the mechanical parking lot including the vehicle charging device is less than that of the power company. It is possible to avoid exceeding the contract power.

  In the first embodiment, the case where the movement start signal is output from the movement control unit 142 has been described. However, the present invention is not limited to this. For example, the movement start of the pallet 11 is started by a sensor provided on the support 12. It may be detected and this detection signal may be used as a movement start signal. As this sensor, for example, a proximity sensor or a limit switch fixed to the parking racks 12a to 12d can be used.

DESCRIPTION OF SYMBOLS 1 ... Mechanical parking equipment, 1a ... Lower end position, 1b ... Up end position, 2 ... Switching control circuit, 3 ... Charge control part, 9, 9A ... Vehicle, 10, 10A, 10B ... Vehicle charging device, 11 ... Pallet, 12 ... support, 12a-12d ... parking shelf, 13 ... lift, 13a ... top surface, 14 ... control panel, 20 ... control unit, 21 ... relay circuit, 21a ... first contact part, 21b ... second contact part , 21c ... coil, 22 ... current sensor, 23 ... switching circuit, 23a ... first contact, 23b ... second contact, 23c ... third contact, 23d ... coil, 24a, 24b ... communication line, 30 ... control circuit, 31 ... relay circuit, 31a ... first contact part, 31b ... second contact part, 31c ... coil, 32 ... switching circuit, 32a ... first contact, 32b ... second contact, 32c ... third contact, 32d ... coil, 33 ... Signal source, 34 ... Switching circuit, 34 ... 1st contact, 34b ... 2nd contact, 34c ... 3rd contact, 34d ... Coil, 35a, 35b ... Communication line, 90 ... Car body, 91 ... Vehicle side connector, 92 ... Charging circuit, 93 ... Control device, 94 ... Storage battery, 95 ... Inverter, 96 ... Electric motor, 97 ... Transmission, 98 ... Front wheel, 99 ... Rear wheel, 104 ... Storage battery, 110 ... Strut, 111 ... Case, 112 ... Charging cable, 113, 113A ... Charging gun, 113a ... 113b ... engagement projection, 113c ... release button, 113d ... connector, 113e ... housing, 113f ... L terminal, 113g ... N terminal, 113h ... GND terminal, 113i ... C terminal, 113j ... P terminal, 113k ... Switch, 113m, 113n ... resistor, 114,115 ... contact unit, 114a to 114d ... moving side contact, 115a to 115d Fixed contact point 121, pillar 122, beam 123, roof 131 131 first drive device 132 second drive device 141 operation panel 142 movement control unit 911 to 915 first to first fifth terminal, 921 ... rectifier circuit portion, 922 ... current controller, 923 ... DC power source, 924 ... _{switch, R 23, R 24, R} 25, R 33, R 34, R 91, R 92 ... resistors, Rc ... Communication resistors

Claims (2)

A pallet on which a vehicle having a storage battery for storing electric power for traveling can be loaded, and a parking facility provided with a moving means for moving the pallet;
Charging means for supplying a charging current to the storage battery to the vehicle;
Charging current reducing means for reducing the amount of charging current drawn to the vehicle based on a signal related to the movement start of the pallet ;
The charging means includes a plurality of fixed-side contacts fixed to a support that movably supports the pallet, and a plurality of moving-side contacts fixed to the pallet, and a vehicle-side connector provided on the vehicle And supplying the charging current to the vehicle via a charging cable interposed between the vehicle side connector and the plurality of moving side contacts,
The charging current reducing means includes a plurality of terminals provided on the vehicle-side connector before the connection between the plurality of fixed-side contacts and the plurality of moving-side contacts is interrupted with the start of movement of the pallet. A vehicle charging device that reduces the amount of charging current drawn to the vehicle by changing a resistance value with respect to a current output from one of the two . The charging current reducing means receives a signal related to the movement start of the pallet via the fixed contact and the moving contact, and changes the resistance value based on the received signal.
The vehicle charging device according to claim 1 .

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