JP5649504B2 - Mechanical parking lot - Google Patents

Description

  The present invention relates to a pallet-type mechanical parking lot.

  Generally, a mechanical parking lot is known as a parking lot that can efficiently park a large number of vehicles in a small space. Various structures are also provided for mechanical parking lots, but as one of them, a vehicle is placed on a pallet, and this pallet is moved forward and backward or left and right by using rails and grooves to make it empty. There is a pallet-type mechanical parking lot that can be transported to a pallet space. In addition, there is also provided a mechanical parking lot in which parking efficiency is further improved by combining a lift and a three-dimensional parking layer with this pallet-type mechanical parking lot.

  On the other hand, in recent years, low-noise and clean electric vehicles and plug-in hybrid vehicles (hereinafter collectively referred to as EV vehicles) have begun to spread. An EV car uses power from a secondary battery such as a lithium ion battery mounted on the EV car as a power source. In order to charge the secondary battery, a charging time of several tens of minutes to several hours is necessary. In view of this, a technique for charging a secondary battery of an EV car using a time during which the EV car is parked in a parking lot has been proposed (for example, see Patent Document 1).

JP 2011-38334 A

  Due to the nature of the pallet-type mechanical parking lot where the pallet moves around in the mechanical parking lot, the electrical connection between the charging circuit on the pallet side and the feeding circuit on the parking lot side is mechanical, that is, by contact between the terminals and the terminals. Often done. In this case, contact resistance due to contact between the terminals occurs on the path of the charging current.

  The charging current for EV cars is generally several tens of amperes for normal charging, and may exceed 100 amperes for rapid charging. If the contact resistance is increased, a large Joule heat is generated there, and the insulating resin around the terminals may melt and the insulation may be destroyed or the terminals may be welded together.

  This invention is made | formed in view of such a condition, The objective is to provide the technique which enables electric power feeding during parking more efficiently in a pallet-type mechanical parking lot.

  One embodiment of the present invention relates to a mechanical parking lot. The mechanical parking lot includes a pallet on which the vehicle is to be mounted, a power receiving terminal that receives power to be supplied to the vehicle mounted on the pallet, a moving device that moves the pallet, and an electric power to the vehicle mounted on the pallet. A power feeding terminal that contacts the power receiving terminal, and a monitoring unit that monitors the magnitude of the electrical resistance through the contact portion between the power receiving terminal and the power feeding terminal.

  According to this aspect, the magnitude of the electrical resistance via the contact portion can be monitored.

  Note that any combination of the above-described constituent elements, and those obtained by replacing the constituent elements and expressions of the present invention with each other among methods, apparatuses, systems, etc. are also effective as an aspect of the present invention.

  ADVANTAGE OF THE INVENTION According to this invention, in a pallet-type mechanical parking lot, it can supply electric power during parking more efficiently.

It is a front view of the mechanical parking lot which concerns on embodiment. It is a top view of a B1F parking room. It is a top view of the electric power feeding unit of FIG. It is a side view of the electric power feeding unit of FIG. It is a side view of a power feeding unit and a power receiving unit when a power feeding parking space is in a power feeding state.

  Hereinafter, the same or equivalent components and members shown in the respective drawings are denoted by the same reference numerals, and repeated descriptions thereof are omitted as appropriate. In addition, the dimensions of the members in each drawing are appropriately enlarged or reduced for easy understanding. Also, in the drawings, some of the members that are not important for describing the embodiment are omitted.

According to the inventor's original examination, it has been found that the contact resistance does not necessarily behave as expected. For example, the higher the pressure of pressure contact between terminals, the lower the contact resistance is not necessarily. Also, the contact resistance may change over time even during a single charging period.
Therefore, in addition to designing the contact resistance to be low by pressing the terminals with appropriate biasing means, etc., the present inventor has a fail-safe function in preparation for unexpected changes in contact resistance. I came up with a parking lot.

  FIG. 1 is a front view of a mechanical parking lot 10 according to an embodiment. The mechanical parking lot 10 is a so-called underground mechanical parking lot that is provided up to the third floor below the building 104 provided on the ground.

  The mechanical parking lot 10 includes a B1F parking room 14 which is a parking room on the first basement floor, a B2F parking room 16 which is a parking room on the second basement floor, a B3F parking room 18 which is a parking room on the third basement floor, A pallet 32, a first transfer device 56, a plurality of second transfer devices 58, a lift frame 88, and four masts 90 provided as pillars at four corners of a hoistway 96 having a substantially rectangular cross section. The elevating device 94 and a plurality of power feeding systems 40 are provided.

  The mechanical parking lot 10 is a pallet type parking lot using a pallet 32. The pallet-type mechanical parking lot 10 uses the lifting device 94 to lift and lower the pallet 32 in which the vehicle 20 such as an automobile is mounted, or to use the first transfer device 56 and the second transfer device 58. It is set as the structure which parks the vehicle 20 in a parking room by using and moving the pallet 32 to a surface direction.

  A passenger compartment 12 for entering the vehicle 20 into the mechanical parking lot 10 and taking out the vehicle 20 from the mechanical parking lot 10 is provided in the building 104. The passenger compartment 12 is provided at the upper end of the hoistway 96. More specifically, the passenger compartment 12 and the hoistway 96 are connected through a communication hole 100 having a size that allows the pallet 32 to pass therethrough.

  In the mechanical parking lot 10, a hoistway 96 is provided along the vertical direction (z direction in the figure). The hoistway 96 communicates with each of the B1F parking room 14, the B2F parking room 16, and the B3F parking room 18. A lifting device 94 is installed at the lower end of the hoistway 96.

  When viewed in plan, the substantially rectangular lift frame 88 is supported by the four masts 90 so as to be movable up and down. A first transfer device 56 is mounted on the upper part of the lift frame 88. The lifting device 94 lifts and lowers the lift frame 88 along the hoistway 96. A pallet 32 is mounted on the top of the first transfer device 56. The first transfer device 56 is configured to be able to move the pallet 32 in the transfer direction.

  The lift frame 88, the four masts 90, and the lifting device 94 include the lift frame, the four masts, and the lifting device described in Japanese Patent Application Laid-Open No. 2009-197417 previously filed by the applicant. Can be applied.

  The pallet 32 is a flat member. The upper surface 32a on which the vehicle 20 of the pallet 32 is mounted is substantially rectangular. The pallet 32 includes an EV car compatible pallet including a power receiving unit 34 having three power receiving terminals, and a pallet that is not. Hereinafter, the pallet 32 is an EV car compatible pallet. The power receiving unit 34 is provided on the side corresponding to the short side of the pallet 32. The power receiving terminal of the power receiving unit 34 receives power to be supplied to the vehicle 20 mounted on the pallet 32 from a power supply terminal described later. The power receiving terminal of the power receiving unit 34 is electrically connected to an electric vehicle power supply outlet (not shown) provided on the upper surface 32 a of the pallet 32 via wiring inside the pallet 32. The EV car mounted on the pallet 32 and the EV car power supply outlet are electrically connected by a dedicated cable or a cable provided in the EV car.

  FIG. 2 is a plan view of the B1F parking room 14. Each of the B1F parking room 14, the B2F parking room 16, and the B3F parking room 18 includes 25 parking spaces. These 25 parking spaces are arranged in a matrix of 5 rows in the transfer direction (x direction) and 5 rows in the cross direction (y direction) substantially orthogonal to the transfer direction when viewed in plan. Each parking space is configured to accommodate the pallet 32. The parking space is one parking area (one unit of parking) in the parking room where the vehicle 20 can be parked together with the pallet 32.

  Of the 25 parking spaces included in each parking room, the five parking spaces arranged farthest from the hoistway 96 are power supply parking spaces that can supply power to vehicles that require power supply such as EV cars. . Each power supply parking space has a power supply system 40.

  Returning to FIG. 1, the power supply parking space 14 a of the B1F parking room 14 shown in FIG. 1 includes a second transfer device 58 installed on the B1F floor 98 and a pallet 32 mounted on the second transfer device 58. And the EV vehicle 22 mounted on the pallet 32 and supplied with power from the power supply system 40. That is, the power supply parking space 14a is in a power supply state in which the EV vehicle 22 is parked and power is supplied to the EV vehicle 22 from the power supply system 40.

  The power supply system 40 includes a power supply panel 42 and a power supply unit 44 having three power supply terminals. The power supply panel 42 and the three power supply terminals of the power supply unit 44 are electrically connected by a cable. The power supply panel 42 supplies the electric power obtained from the external power source to the power supply terminal at a voltage suitable for supplying to the EV vehicle 22. For example, the power supply panel 42 may supply a single-phase AC 200V or 100V to two of the three power supply terminals and a ground potential to the remaining one.

  The power feeding terminal of the power feeding unit 44 mechanically contacts the power receiving terminal of the pallet 32 when the pallet 32 is disposed at a predetermined charging position in the power feeding parking space 14a. That is, when the power supply system 40 supplies power to the EV vehicle 22 mounted on the pallet 32, the power supply terminal of the power supply unit 44 contacts the power reception terminal of the pallet 32.

  Other parking spaces that are not powered parking spaces basically have a configuration in which the feeding system is excluded from the configuration of the powered parking space. For example, a transport device described in Japanese Patent Publication No. 7-29681 filed earlier by the present applicant can be applied to the second transfer device 58.

  FIG. 3 is a top view of the power supply unit 44. FIG. 4 is a side view of the power supply unit 44. The power supply unit 44 includes a unit frame 70, three power supply terminals 72, two control units 74, two thermocouple temperature measuring units 76, a transparent cover 78, and an optical sensor 60.

  The power supply terminal 72 includes a power supply side contact portion 80, an urging means, that is, a coil spring 82, a linear bush 84, and a shaft 86. A substantially cylindrical power supply side contact portion 80 is coupled to one end of the shaft 86, and one end of a cable 92 is coupled to the other end. The other end of the cable 92 is connected to the power supply panel 42.

  The linear bushing 84 is embedded in a terminal hole that penetrates a terminal holding plate 70 a that is erected substantially vertically on the upper surface of the unit frame 70. The shaft 86 is inserted into the linear bush 84. That is, the linear bush 84 holds the shaft 86 so as to be movable in the cross direction (y direction). The coil spring 82 is provided between the power supply side contact portion 80 and the terminal holding plate 70a, and the shaft 86 is inserted inside thereof.

  At least the power supply side contact portion 80 and the shaft 86 of the power supply terminal 72 are formed of a conductor, for example, metal. In order to insulate the power supply terminals 72 and insulate the power supply terminals 72 from the ground, the terminal holding plate 70a is formed of an insulator, for example, a resin such as plastic.

  The transparent cover 78 is configured to partially cover the upper surface, the side surface, and the rear surface of the power supply terminal 72 and to be in non-contact with the power supply terminal 72. Accordingly, the operation can be confirmed visually and, for example, the workability of the worker around the power supply unit 44 at the time of maintenance can be improved.

  For each of the three power supply terminals 72 except for the one corresponding to the ground potential, a set of a control unit 74 that reads an electric signal from the thermocouple and the thermocouple is provided. The thermal contact of the thermocouple, that is, the temperature measuring unit 76 is attached to the cylindrical side surface of the power supply side contact unit 80. For example, the temperature measuring unit 76 of the thermocouple is screwed into a screw hole provided on the cylindrical side surface of the power supply side contact unit 80. The control unit 74 is fixed on the upper surface of the unit frame 70 and is connected to the thermocouple temperature measuring unit 76.

  FIG. 5 is a side view of the power supply unit 44 and the power reception unit 34 when the power supply parking space is in a power supply state. The side surface shown in FIG. 5 corresponds to the side surface shown in FIG. The power receiving unit 34 includes a power receiving terminal 62, a power receiving frame 68 formed of an insulator, and a reflector 46 attached to the lower part of the power receiving terminal 62. The power receiving terminal 62 includes a substantially cylindrical power receiving side contact portion 64 and a power receiving shaft 66. The power receiving shaft 66 is held by a power receiving frame 68, and one end of the power receiving side contact portion 64 is coupled to one end, and the other end of the wiring inside the pallet 32 is coupled to the other end. The power receiving side contact portion 64 and the power receiving shaft 66 are made of metal.

  In the power supply state of the power supply parking space, the power receiving side contact portion 64 and the power supply side contact portion 80 are in contact with each other, and the distance between the power supply side contact portion 80 and the terminal holding plate 70a is shorter than the natural length of the coil spring 82. Therefore, the coil spring 82 urges the power feeding side contact portion 80 in a direction toward the power receiving side contact portion 64. As a result, the power supply side contact portion 80 and the power reception side contact portion 64 are in pressure contact with each other.

  Each of the control units 74 includes a monitoring unit, a power supply limiting unit, and a notification unit (not shown). The thermocouple and the control unit 74 are configured to operate even when the maximum voltage applied to the corresponding power supply terminal 72 is applied.

  The monitoring unit monitors the temperature of the contact portion between the power supply terminal 72 and the power receiving terminal 62, that is, the temperature of the power supply side contact unit 80 indicated by the thermocouple, and when the temperature becomes higher than a predetermined warning temperature, the power supply limiting unit and the notification unit Send a warning signal to Here, if the contact resistance between the power feeding side contact portion 80 and the power receiving side contact portion 64 is large, the heat generated there during power feeding increases and the temperature also rises. Therefore, it can be said that the monitoring unit monitors the magnitude of the electrical resistance through the contact portion between the power receiving terminal 62 and the power feeding terminal 72. Further, the transmission of the warning signal corresponds to the case where the monitoring unit determines that the contact resistance is larger than the predetermined value.

  When the power supply limiting unit receives the warning signal from the monitoring unit, the power supply limiting unit limits power supply via the power supply terminal 72 to the EV vehicle 22 mounted on the pallet 32 and the power reception terminal 62 that contacts the power supply terminal 72. In other words, when receiving the warning signal, the power supply limiting unit transmits a power supply stop signal to the power supply panel 42 via a control line (not shown). The power supply panel 42 is configured to stop the supply of power to the power supply terminal 72 when receiving a power supply stop signal. Thereby, when the power supply limiting unit transmits a power supply stop signal, power supply to the EV vehicle 22 is stopped.

  When the notification unit receives the warning signal from the monitoring unit, the notification unit displays a predetermined warning message on a monitor provided in a management room (not shown) of the mechanical parking lot 10. The predetermined warning message may include information specifying the power supply terminal 72 corresponding to the monitoring unit that transmitted the warning signal and a message notifying that heat generation or contact abnormality has occurred in the power supply terminal 72. An administrator of the mechanical parking lot 10 in the management room can receive a warning notice by reading such a message displayed on the monitor.

From the viewpoint of ease of work by the worker during maintenance, it is preferable to start power supply after the pallet 32 is arranged at the charging position in the power supply parking space, rather than constantly supplying power from the power supply panel 42 to the power supply terminal 72. Therefore, the mechanical parking lot 10 according to the present embodiment includes a position detection unit including the reflection plate 46 and the optical sensor 60 provided on the upper surface of the unit frame 70. This position detection part determines whether the pallet 32 was arrange | positioned in the charging position of an electric power feeding parking space. When the position detection unit determines that the pallet 32 is disposed at the charging position of the power supply parking space, the power supply panel 42 starts power supply to the power supply terminal 72.
It should be noted that the reflector 46 may be installed only on the pallet 32 that is equipped with the power receiving unit 34 and is compatible with the EV vehicle. In this case, for example, when a pallet that is not compatible with an EV vehicle enters the power supply parking space in a puzzle operation, power supply is prevented from starting.

When the pallet 32 is disposed at the charging position of the power supply parking space, the light sensor 60 and / or the reflection plate 46 are reflected by the reflection plate 46 so that the light emitted upward from the light sensor 60 is reflected on the light sensor 60. Arranged to go back. When detecting the light reflected by the reflecting plate 46, the optical sensor 60 transmits a power supply start signal to the power supply panel 42 via a control line (not shown). When the power supply panel 42 receives the power supply start signal, the power supply panel 42 starts supplying power to the power supply terminal 72.
A displacement sensor or a proximity sensor may be used as the position detection unit instead of the pair of the reflector 46 and the optical sensor 60.

  According to the mechanical parking lot 10 according to the present embodiment, when the power supply parking space is in a power supply state, the contact resistance between the power supply side contact portion 80 of the power supply terminal 72 and the power reception side contact portion 64 of the power reception terminal 62 is large. Is monitored. Therefore, even if the contact resistance between the power feeding side contact portion 80 and the power receiving side contact portion 64 increases for some reason, it can be detected and appropriately dealt with.

  In the mechanical parking lot 10 according to the present embodiment, the temperature of the contact portion is monitored as a parameter indicating the magnitude of the contact resistance. When the contact resistance becomes larger than the design value, the temperature of the contact portion rises due to heat generation. In the mechanical parking lot 10 according to the present embodiment, such a temperature rise can be detected and appropriately dealt with.

  Although power loss also occurs due to an increase in contact resistance, the main problem is heat generation at the contact portion. By directly monitoring the temperature of the contact portion, it is possible to detect such heat generation more accurately than when, for example, the contact resistance is directly measured.

  In mechanical parking lot 10 according to the present embodiment, when it is determined that the temperature of the contact portion is higher than the warning temperature, power supply via the contact portion is limited. Therefore, the further heat_generation | fever in the contact part can be suppressed.

  In the mechanical parking lot 10 according to the present embodiment, when it is determined that the temperature of the contact portion is higher than the warning temperature, the administrator of the mechanical parking lot 10 is notified of the warning. Therefore, the administrator can take an appropriate measure according to the notified warning.

  The mechanical parking lot 10 according to the embodiment has been described above. This embodiment is an exemplification, and it is understood by those skilled in the art that various modifications can be made to combinations of the respective constituent elements, and such modifications are also within the scope of the present invention.

  In the embodiment, the case where the monitoring unit monitors the temperature of the power supply side contact unit 80 indicated by the thermocouple has been described. However, the present invention is not limited to this. For example, the monitoring unit may monitor the temperature of the power receiving side contact unit 64.

  In the embodiment, the case where the temperature is measured using the thermocouple has been described. However, the present invention is not limited to this. For example, another contact type temperature sensor or a non-contact temperature sensor may be used.

  In the embodiment, the case where the temperature of the contact portion is adopted as a parameter indicating the magnitude of the contact resistance has been described. However, the present invention is not limited to this. For example, the monitoring unit may directly measure the magnitude of the contact resistance.

  In the embodiment, the case where the power supply limiting unit stops the power supply to the power supply panel 42 when receiving the warning signal is described, but the present invention is not limited to this. For example, the power supply limiting unit may reduce the maximum value of the current supplied by the power supply panel 42.

  In the embodiment, the case where the notification unit displays the warning message on the monitor provided in the management room when receiving the warning signal from the monitoring unit has been described. However, the present invention is not limited to this. For example, the notification unit may transmit an e-mail including a warning message to the e-mail address of the administrator, or may turn on a warning lamp in the management room.

  In the embodiment, the case where the pallet 32 includes the power receiving unit 34 having three power receiving terminals has been described, but the present invention is not limited thereto. For example, the pallet and the power receiving unit may be separated. For example, when the power receiving unit is attached to a tire of a vehicle in the passenger compartment and the pallet is placed at a predetermined charging position in the power supply parking space as in the embodiment, the power supply terminal and the power reception terminal of the power supply unit are in mechanical contact with each other. You may make it do.

  In the embodiment, the case where the pallet is a flat plate member has been described. However, the present invention is not limited to this, and for example, a flat plate pallet may be provided with a groove at a position corresponding to the tire, or may correspond to the tire. A fork-type pallet or the like whose position is held by a comb-like tire holding portion can be used.

  10 mechanical parking lot, 12 boarding / exiting room, 14 B1F parking room, 16 B2F parking room, 18 B3F parking room, 20 vehicle, 32 pallet, 34 power receiving unit, 40 power supply system, 56 first transfer device, 58 second transfer Mounting device.

Claims (4)

A pallet on which the vehicle should be mounted,
A power receiving terminal for receiving power to be supplied to the vehicle mounted on the pallet;
A moving device for moving the pallet;
When supplying electric power to the vehicle mounted on the pallet, a power supply terminal in contact with the power receiving terminal,
While holding the power feeding terminal, a terminal holding portion made of an insulator,
A biasing means for biasing the power feeding terminal in a direction toward the power receiving terminal when the power receiving terminal and the power feeding terminal are in contact;
A temperature measuring unit that is attached to the power receiving terminal or the power feeding terminal and measures the temperature of the power receiving terminal or the power feeding terminal attached,
A mechanical parking lot, comprising: a monitoring unit that monitors a temperature of a contact portion between the power receiving terminal and the power feeding terminal by monitoring a temperature measured by the temperature measuring unit . A plurality of the power receiving terminals are provided,
A plurality of the power supply terminals are provided,
The terminal holding part insulates the plurality of power supply terminals,
Among the plurality of power supply terminals, at least one power supply terminal has a ground potential,
2. The mechanical parking lot according to claim 1, wherein the temperature measuring unit is attached to the power supply terminal other than the power supply terminal that becomes the ground potential. When it is determined that the temperature measured by the temperature measuring unit is higher than a predetermined value in the monitoring unit, the monitoring unit further includes a power supply limiting unit that limits power supply via the contact portion to the vehicle mounted on the pallet. The mechanical parking lot according to claim 1 or 2. 2. The information processing apparatus according to claim 1, further comprising: a notification unit that notifies the administrator of the mechanical parking lot of a warning when the monitoring unit determines that the temperature measured by the temperature measuring unit is higher than a predetermined value. The mechanical parking lot in any one of from 3.

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