JP2005269687A - Noncontact charger for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily inspect/repair a noncontact charger for vehicle in safety on the ground, without being forced to take an unreasonable work posture. <P>SOLUTION: The noncontact charger for vehicle charges the power battery 33 of a vehicle, by coupling a primary coil 3 connected with an external power supply electromagnetically with a secondary coil 42 connected with the power battery 33. The primary coil 3 is located to be substantially flush with the road surface R, on which the vehicle travels at a position where the vehicle does not travel. The primary coil 3 is arranged to be pushed out below the secondary coil 42 provided on the bottom face 47 of the vehicle. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a non-contact charging device for a vehicle, more specifically, a battery mounted in a vehicle such as an electric vehicle or a hybrid vehicle having two or more power sources such as an internal combustion engine and an electric motor. It is related with the non-contact charging device for vehicles for carrying out.

  Various electric vehicles have been developed in the past, but all vehicles are equipped with a battery as a power source. Then, after charging the battery, power is supplied from the battery to the motor to run.

  The battery charging device is installed at a charging station corresponding to a gas station or the like and connected to the battery of the electric vehicle by a large outlet or the like. The charging device is a 100V or 200V commercial AC power supply. In general, the voltage is stepped up or down using a transformer to a voltage corresponding to the voltage of the battery of the electric vehicle, rectified by a relatively large capacity rectifier, and supplied to the battery.

On the other hand, as shown in FIG. 11, when the non-contact type magnetic core 35 is provided at the bottom of the electric vehicle 31, the charging power supply unit 32 causes the magnetic core 39 when the electric vehicle 31 stops at a predetermined position. Is raised to oppose the magnetic core 35 of the electric vehicle 31 to form a magnetic coupling portion, and a high frequency AC voltage from the inverter 37 is supplied to the electric vehicle 31 to charge the battery 33 (for example, (See Patent Document 1). In FIG. 11, 36 indicates a commercial power source, 38 indicates a communication device, and 40 indicates wiring.
Japanese Patent No. 2879285 (page 4, FIG. 3)

  However, since the magnetic core 39 is provided in a hole (drawing number pear) provided on the road surface, when inspecting / repairing the magnetic core 39 or its ancillary equipment, the magnetic core 39 is adjacent to the hole. It is necessary to go into the narrow manhole provided for inspection and repair, and it is often forced to take an unreasonable working posture.

  In addition, such a pit-type magnetic core storage hole is liable to allow rainwater or the like to flow in, so that it is necessary to install ancillary equipment such as a drainage pump, which increases equipment costs. Furthermore, since the pothole type magnetic core housing hole provided on the road surface usually needs to be covered with a sturdy iron lid like a manhole lid, it is not easy to open and close.

  The present invention has been made to eliminate such inconveniences, and the object of the present invention is to provide a vehicle non-contact charging device that is safe on the ground without being forced into an unreasonable working posture. In addition, it is an object of the present invention to provide a non-contact charging device for a vehicle that can be easily inspected and repaired, and does not require installation of auxiliary equipment such as a drainage pump.

  In order to achieve the above object, the present invention is configured as follows.

  According to a first aspect of the present invention, there is provided a vehicle non-contact charging apparatus for charging the power battery by electromagnetically coupling a primary coil connected to an external power source to a secondary coil connected to a power battery of the vehicle. The secondary coil is installed on a position substantially the same as the road surface on which the vehicle travels and the vehicle does not travel, and the primary coil is pushed out below the secondary coil provided on the bottom surface of the vehicle. This is a non-contact charging device for vehicles.

  According to a second aspect of the present invention, there is provided a pair of left and right fixed frames, the second movable frame having an H-shaped cross section, wherein the charging device is installed on a position substantially flush with a road surface on which the vehicle travels and the vehicle does not travel. 2. A first movable frame supported by the fixed frame via an intermediate frame, an elevating frame provided on the first movable frame so as to be movable up and down, and a primary coil provided on the elevating frame. It is a non-contact charging device for vehicles.

  According to a third aspect of the present invention, the second movable frame is supported by a plurality of wheels provided inside the fixed frame and a plurality of wheels provided on the left and right sides of the first movable frame. It is a non-contact charging device for vehicles.

  The invention according to claim 4 is the vehicle according to claim 3, wherein the plurality of wheels of the first movable frame are provided in the rear half portion of the first movable frame, and the plurality of wheels of the fixed frame are provided in front of it. It is a non-contact charging device.

  According to a fifth aspect of the present invention, the lifting frame is supported by a plurality of lifting screws provided upright on the first movable frame, and a chain wheel is provided below each lifting screw and surrounds these chain wheels. The non-contact charging device for a vehicle according to claim 2, wherein the endless chain provided in this manner is rotated by a lifting motor.

  According to a first aspect of the present invention, there is provided a vehicle non-contact charging apparatus for charging the power battery by electromagnetically coupling a primary coil connected to an external power source to a secondary coil connected to a power battery of the vehicle. The secondary coil is installed on a position substantially the same as the road surface on which the vehicle travels and the vehicle does not travel, and the primary coil is pushed out below the secondary coil provided on the bottom surface of the vehicle. So, when you inspect and repair the charging device, if you remove the iron lid that covers the charging device, the charging device etc. will be exposed to the base of the white day, and you will not be forced to be cramped like before It is possible to perform inspections and repairs in an easy posture.

  In addition, since the conventional pit-hole type magnetic core housing hole is likely to allow rainwater to flow in, it is necessary to install ancillary facilities such as a drainage pump, but the charging device of the present invention is substantially the same as the road surface on which the vehicle travels Since the vehicle is provided at a position where the vehicle does not travel, there is no need to install auxiliary equipment such as a drainage pump, and the equipment cost can be reduced accordingly.

  According to a second aspect of the present invention, there is provided a charging device having a pair of left and right fixed frames installed on a position substantially flush with a road surface on which the vehicle travels and where the vehicle does not travel, and a second H-shaped cross section. Compared to the first movable frame supported by the fixed frame via the movable frame, the lifting frame provided on the first movable frame so as to be movable up and down, and the primary coil provided on the lifting frame. Although it is a simple device, the primary coil can be smoothly pushed out below the secondary coil provided on the bottom surface of the vehicle.

  In the invention according to claim 3, since the second movable frame is supported by the plurality of wheels provided inside the fixed frame and the plurality of wheels provided on the left and right sides of the first movable frame, The same effect as the invention can be obtained.

  In the invention according to claim 4, since the plurality of wheels of the first movable frame are provided in the latter half portion of the first movable frame, and the plurality of wheels of the fixed frame are provided in front of it, the invention according to claim 2 is provided. The same effect as the invention can be obtained.

  According to a fifth aspect of the present invention, the lifting frame is supported by a plurality of lifting screws provided upright on the first movable frame, and a chain wheel is provided below each lifting screw and surrounds these chain wheels. Since the endless chain thus provided is rotated by the lifting motor, the lifting frame can be smoothly lifted and lowered.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  In this embodiment, a non-contact charging device for an electric vehicle is taken as an example, but the present invention can also be applied to a hybrid vehicle having two or more power sources such as an internal combustion engine and an electric motor.

  1 is a plan view including a partial cross section of a non-contact charging device for an electric vehicle according to the present invention, FIG. 2 is a cross-sectional view taken along line BB ′ of FIG. 1, and FIG. 3 is a cross-sectional view taken along line AA ′ of FIG. .

  In FIG. 1 to FIG. 3, reference numeral 31 a denotes a relatively large electric vehicle such as a microbus, for example, which travels on the road surface R by supplying electric power from a battery 33 mounted on the vehicle body 41 to a motor (not shown). ing.

  The charging device 1 for charging the battery 33 is installed in the charging station 2 corresponding to a gasoline station or the like, the secondary coil 42 of the electric vehicle 31a and the primary coil 3 of the charging station 2 are opposed to each other, and magnetic field lines are generated. The battery 33 is charged in a non-contact state using it.

  The charging device 1 boosts or lowers the voltage of a commercial AC power supply (not shown) of 100 V or 200 V to a voltage corresponding to the voltage of the battery 33 of the electric vehicle 31 a using a transformer, and a rectifier 43 having a relatively large capacity. Is rectified and supplied to the battery 33. In FIG. 3, 44 is a BMS (Battery Measurement System), 45 is an RBCI (Remote Battery Charge Interface), and 46 is an infrared communication transceiver.

  This non-contact type charging device 1 is substantially the same as the road surface R on which the electric vehicle 31a travels, and a position where the vehicle does not travel, for example, a work place (work space) where the charging stand 2 is installed. It is installed on the floor surface 5 of the side hole type void 4 of the platform H. The side surface of the void 4 is reinforced by a U-shaped or bowl-shaped frame 6, and the front surface 7 of the base portion H facing the road surface R and the upper surface 8 of the base portion H that is higher than the road surface R. Is open. The front opening 7 of the base H may be normally closed by a lid (not shown) that can be opened and closed. The upper surface opening 8 of the frame 6 is covered with an iron lid 9.

  As shown in FIGS. 4 and 5, the charging device 1 includes a pair of left and right fixed frames (L-shaped steel) 11 installed on the floor surface 5 of the space 4 and a second movable frame 12 having an H-shaped cross section. The first movable frame 13 supported by the fixed frame 11 via the first movable frame 13, the lifting frame 14 provided on the first movable frame 13 so as to be movable up and down, and the primary coil 3 provided on the lifting frame 14. Yes. On the primary coil 3, a plurality (four in the case of the figure) rubber cushioning materials 15 are provided.

  The second movable frame 12 includes a plurality (two in the figure) of wheels 16a and 16b provided inside the fixed frame 11 and a plurality of (two in the figure shown) provided on the left and right sides of the first movable frame 13. ) Wheels 17a and 17b. However, the plurality of wheels 17a and 17b of the first movable frame 13 are provided in the latter half portion of the first movable frame 13, and the plurality of wheels 16a and 16b of the fixed frame 11 are provided in front of it. The second movable frame 12 is configured so that both front and rear ends thereof are closed by end plates 18 and moved by the first movable frame 13.

  As shown in FIGS. 4 and 5, the elevating frame 14 is supported by a plurality of (in the case of FIG. 4) elevating screws 19 erected on the first movable frame 13. A chain wheel 20 is provided at the lower part of each elevating screw 19, and an endless chain 21 provided so as to surround these chain wheels 20 is rotated by an elevating motor 22, whereby the elevating frame is provided. 14 is moved up and down.

  On the other hand, the second endless chain 27 provided between the drive chain wheel 25 provided in the delivery motor 23 and the fixed chain wheel 26 fixed to the tip of the first movable frame 13 is sent by the delivery motor 23. By rotating, the first movable frame 13 is slid in the front-rear direction.

  As shown in FIG. 6, the second endless chain 27 is supported in a substantially U shape by a drive chain wheel 25, a fixed chain wheel 26, and three driven chain wheels 28 a to 28 c. The two driven chain wheels 28 b and 28 c except the driven chain wheel 28 a immediately below are provided on the first movable frame 13.

  FIG. 7 is a control system diagram of the contactless charging apparatus for an electric vehicle according to the present invention. As described above, the secondary coil 42 is installed on the bottom surface 47 of the electric vehicle 31a. A rectifier 43, RBCI 45, and infrared communication transmitter / receiver 46 are connected in series to the secondary coil 42, a battery 33 is connected to the rectifier 43, and a BMS 44 is connected to the RBCI 45.

  On the other hand, the non-contact charging high-frequency power supply device 51 provided on the charging stand 2 side is provided with a CPU 52, and the infrared communication transmitter / receiver 53 on the charging stand 2 side and the infrared light on the electric vehicle side according to instructions of the CPU 52. A high-frequency signal is exchanged with the communication transceiver 46, and an actuator 55, that is, a sending motor and a lifting motor are controlled by a control device 54. In the figure, C1 and C2 are relay contacts, respectively.

  Then, the effect | action of the said non-contact-type charging device is demonstrated.

  An electric vehicle that requires charging, for example, a relatively large electric vehicle 31a such as a microbus, stops at a fixed position of the charging stand 2 as shown in FIG. At that time, the electric vehicle 31 a stops so that the secondary coil 42 provided on the bottom surface 47 is directly beside the primary coil 3 of the charging stand 2. The fine adjustment of the stop position in the front-rear direction is performed by the driver operating the electric vehicle so as to match a stop position mark (not shown) provided on the road surface.

  After positioning of the electric vehicle 31a, as shown in FIG. 9, the first movable frame 13 of the charging apparatus 1 is pushed forward, that is, below the floor of the electric vehicle 31a, as shown in FIG. It stops just below the secondary coil 42 provided on the bottom surface 47 of 31a.

  The positioning is performed by a touch sensor 57 provided at the tip of the first movable frame 13 touching a touch plate 48 provided on the bottom surface 47 of the electric vehicle 31a.

  Of course, such a sensor may not be provided, and a system in which the movable frame is simply extended by a certain length may be used. This is because a professional driver can stop with a positional accuracy within ± 50 mm by practice.

  After the first movable frame 13 is positioned, when the lifting motor 22 of the charging device 1 is started, the lifting frame 14 is raised, and the primary coil 3 is connected to the electric vehicle 2 via the buffer member 18 as shown in FIG. The next coil 42 is approached. Subsequently, when a high-frequency current is supplied to the primary coil 3 according to a command from the CPU 52, a high-frequency alternating current is generated in the secondary coil 42 of the electric vehicle by the magnetic lines of force. The battery is charged.

  After the completion of charging, when the primary coil 3 is lowered to a fixed position and then the first movable frame 13 is moved backward toward the initial position, the second movable frame 12 follows the backward movement of the first movable frame 13. Also retracts toward the initial position. Then, after the primary coil 3 returns to the space 4 provided in the platform H and the obstacle such as the primary coil disappears under the floor of the electric vehicle 31a, the electric vehicle 31a is advanced.

  When inspecting / repairing the charging device 1 housed in the space 4 provided in the pedestal H, removing the iron lid 9 covering the side hole type space 4, the charging device 1, etc. Can be inspected and repaired in an easy posture without being forced to be cramped like before.

  In addition, since the conventional pit-hole type magnetic core housing hole easily receives rainwater and the like, it is necessary to install ancillary facilities such as a drainage pump. However, the charging device of the present invention has a road surface R on which an electric vehicle or the like runs. Therefore, it is not necessary to install additional equipment such as a drainage pump, and the equipment cost can be reduced correspondingly.

It is a top view including the partial cross section of the non-contact charging device for vehicles concerning the present invention. It is B-B 'sectional drawing of FIG. It is A-A 'sectional drawing of FIG. It is a top view of the non-contact charging device concerning the present invention. It is a front view of the non-contact charging device concerning the present invention. It is explanatory drawing of the bridge | crosslinking system of the delivery endless chain. It is a schematic block diagram of the control system of the non-contact charging device for vehicles concerning the present invention. It is state explanatory drawing in which the electric vehicle stopped right beside the non-contact charging device of the present invention. It is state explanatory drawing which the primary coil approached under the floor of the electric vehicle. It is state explanatory drawing which the primary coil raised and approached the secondary coil. It is a schematic block diagram of the conventional non-contact charging device.

Explanation of symbols

3 Primary coil 4 Empty space 31a Electric vehicle 33 Battery 42 Secondary coil R Road surface on which the electric vehicle runs H Platform

Claims (5)

In a non-contact charging device for a vehicle for charging a power battery by electromagnetically coupling a primary coil connected to an external power source to a secondary coil connected to a power battery of the vehicle, the road surface on which the vehicle travels is provided. And the vehicle is installed at a position where the vehicle does not travel, and the primary coil protrudes below a secondary coil provided on the bottom surface of the vehicle. Non-contact charging device. The charging device is supported by the fixed frame via a pair of left and right fixed frames installed on a position substantially the same as the road surface on which the vehicle travels and the vehicle does not travel, and a second movable frame having an H-shaped cross section. The non-contact charging device for a vehicle according to claim 1, comprising a first movable frame, a lifting frame provided on the first movable frame so as to be movable up and down, and a primary coil provided on the lifting frame. The non-contact charging device for a vehicle according to claim 2, wherein the second movable frame is supported by a plurality of wheels provided inside the fixed frame and a plurality of wheels provided on the left and right sides of the first movable frame. The non-contact charging device for a vehicle according to claim 3, wherein the plurality of wheels of the first movable frame are provided in a rear half portion of the first movable frame, and the plurality of wheels of the fixed frame are provided in front thereof. The elevating frame is supported by a plurality of elevating screws standing on the first movable frame, and a chain wheel is provided below each elevating screw, and an endless chain provided so as to surround these chain wheels is used for elevating The non-contact charging device for a vehicle according to claim 2, wherein the vehicle is rotated by a motor.

Images