JPH0670409A - Charging system for motor operated vehicle - Google Patents

Abstract

PURPOSE:To provide a charging system for a motor operated vehicle in which a stationary charger can be easily connected to a battery without necessity of a replugging operation and the battery can be simply charged without human intervention CONSTITUTION:At the time of charging a battery 5 for a motor operated vehicle, the vehicle is so moved that a trolley wire 4 provided at a stationary charger 2 is brought into contact with a current collecting arm 3 provided in the vehicle thereby to supply power from a power source 11 to the battery 5 through the wire 4 and the arm to charge the battery.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging system for an electric vehicle such as a battery forklift that charges a battery of the electric vehicle.

[0002]

2. Description of the Related Art Conventionally, for charging a battery of an electric vehicle driven by a battery power source, for example, a location where a stationary charging device for supplying power is installed when the electric vehicle is not equipped with a charging device. Move the electric car to, remove the plug that connects the battery and the control device of the electric car, connect the battery and the stationary charging device with the plug, and then turn on the charging switch of the electric car to charge. Was there.

[0003]

However, when charging as described above, it is troublesome to replace the connection plugs of the battery, the control device, and the stationary charging device, and the plugs may be replaced by mistake. For example, there is a risk that the control device and the stationary charging device are connected to each other and the control device is destroyed. The present invention solves the above-mentioned problems, does not require plug replacement work, can easily connect the stationary charging device and the battery, and can easily charge the battery without using human hands. An object of the present invention is to provide a charging system for an electric vehicle that can be used.

[0004]

In order to achieve the above object, the present invention provides a charging for an electric vehicle comprising an electric vehicle driven by a battery power source and a stationary charging device for charging the battery of the electric vehicle. In the system, the stationary charging device is provided with a trolley wire for supplying a charging power source, the electric vehicle is provided with a current collecting arm for collecting a charging current to a battery, and the trolley wire is provided with the current collecting arm. The battery of the electric vehicle is charged by bringing the battery into contact with.

[0005]

According to the above structure, when the battery of the electric vehicle is charged, the electric vehicle is moved so that the trolley wire provided in the stationary charging device and the current collecting arm provided in the electric vehicle come into contact with each other. Thus, the battery can be charged by supplying power from the power source to the battery via the trolley wire and the current collecting arm.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. Fig. 1 shows the schematic configuration of the charging system of the forklift, and Fig. 2 shows the configuration of the current collecting arm of the forklift.
FIG. 3 shows the structure of the current collecting arm and the trolley wire portion. The present system, which is an electric vehicle, includes a forklift 1 that uses a battery power source as a drive source, and a stationary charging device 2 that is a power supply for the forklift 1. Further, in order to connect the forklift 1 and the stationary charging device 2, the forklift 1 has its head guard 20 (see FIG. 2).
A current collecting arm 3 is provided in a portion thereof, and a trolley wire 4 (see FIG. 3) is provided in the stationary charging device 2. The forklift 1 is a drive source of the forklift 1, and has a battery 5 that stores the supplied charging current, an on-vehicle charge control device 6 that controls charging of the battery 5, and an on-vehicle charge control device 6 that controls energization. A magnet switch 8 that is opened and closed by the exciting coil 7 and a transmission circuit 9 that transmits a charging request signal to the stationary charging device 2 are provided.
Further, the operation panel (not shown) of the forklift 1 has a charging switch 1 operated by the user at the time of charging request.
0 is provided and when the charging switch 10 is turned on, the in-vehicle charging control device 6 is configured to output a charging request signal.

The stationary charging device 2 includes a power source 11, an electromagnetic contactor 12 for controlling the opening and closing of the power source, and a transformer 13.
A diode bridge 14 connected to the secondary side of the transformer 13 to rectify an alternating current into a direct current for charging; a receiving circuit 15 for receiving the charging request signal; and a receiving circuit 15 for responding to the signal received by the receiving circuit 15. And a stationary charge control device 16 for controlling power supply. The stationary charge control device 16 controls opening / closing of the electromagnetic contactor 12 according to a received signal.

Next, the operation of the system having the above configuration will be described. In this embodiment, when the battery 5 is charged, the forklift 1 is moved so that the current collecting arm 3 is located below the trolley wire 4 provided on the ceiling, and the charging switch 10 is turned on. The vehicle body charging control device 6 brings the current collecting arm 3 into contact with the trolley wire 4.
As shown in FIG. 2, this operation is performed by an electric cylinder 21 that is provided in the head guard 20 portion of the forklift 1 and that moves the current collecting arm 3 up and down. Note that FIG.
Shows a state where the current collecting arm 3 and the trolley wire 4 are in contact with each other.

In preparation for charging, the vehicle body charging control device 6 applies a voltage to the exciting coil 7 to excite the voltage and turn on the magnet switch 8 to turn on the stationary charging via the current collecting arm 3 and the trolley wire 4. A charging line from the device 2 to the battery 5 of the forklift 1 is formed. After these preparations for charging are completed, the vehicle body charging control device 6 sends a charging request signal from the transmission circuit 9 onto the charging line. This signal is received by the receiving circuit 15, and the stationary charging control device 16 turns on the electromagnetic contactor 12. As a result, the voltage rectified from the power supply 11 via the diode bridge 14 is applied to the charging line, and the charging current is supplied to the battery 5.

As described above, according to this embodiment, the charging arm 1 and the trolley wire 4 are brought into contact with each other, and the charging switch 1
The battery 5 can be charged simply by turning 0 on. Therefore, in the case of charging, unlike the conventional case, it is not necessary to remove the plug that connects the battery and the control device of the electric vehicle, and to replace the plug between the stationary charging device and the battery, it is possible to shorten the working time. be able to. In addition, conventionally,
At the time of plug replacement work, there is a risk that the control device and the stationary charging device may be mistakenly connected and the control device may be damaged. However, since this system does not perform the above work, there is no such fear.

Further, the present invention is not limited to the above embodiment, but various modifications can be made. For example, the structures of the forklift 1 and the stationary charging device 2 may be further simplified. That is, in the above-described embodiment, the forklift 1 does not include the transmission circuit 9 and the stationary charging device 2 does not include the reception circuit 15. According to this configuration, by keeping the electromagnetic contactor 12 in the ON state at all times, the trolley wire 4 is always supplied with power, and the trolley wire 4 can be easily charged with a simpler configuration.

Further, in order to guide the forklift 1 below the trolley wire 4 in order to improve the work efficiency, the induction by the electromagnetic induction method as shown in FIG. 4A or the same FIG. A guide system using a guide rail as shown may be incorporated in the present system. Figure 4
In the electromagnetic induction system of (a), a guide line 30 is provided on the floor, and the guide line 30 is detected by a pickup coil 31 provided at the bottom of the vehicle body of the forklift to detect the trolley wire 4.
Guide the car body under. Further, in the guide system of FIG. 4B, the guide rail 32 is provided on the floor, and the guide rail 3
Guide the car body under the trolley wire 4 along 2. Wheels 33 are provided on the side surface of the lower portion of the vehicle body of the forklift truck so as not to interfere with the propulsion force even if the guide rail 32 comes into contact with the vehicle body. By adopting such a guidance system, it is possible to reduce the time and effort required for the user to move the forklift under the trolley wire 4.

Further, in the above embodiment, the current collecting wire 3
Is provided in the head guard 20 portion of the forklift 1, but it may be provided in a portion that does not interfere with the work of the forklift, and the trolley wire 4 may be arranged correspondingly. As a result, in the facility of this system at the work site,
There will be no restrictions on facility location. In addition, although a forklift is shown as an electric vehicle in the present embodiment, the present invention is not limited to this, and can be similarly applied to all electric vehicles that use a battery power source as a drive source.

[0014]

As described above, according to the present invention, the stationary charging device is provided with the trolley wire for feeding the charging power source, and the electric vehicle is provided with the collecting arm for collecting the charging current to the battery. The battery of the electric vehicle can be charged by providing the trolley wire with the current collecting arm so that the battery can be easily charged with a simple structure. It is possible to omit the manual work of replacing the plug connecting the control device and the battery with each other to connect the stationary charging device and the battery, and there is no fear of mistakenly replacing the plug and destroying the control device.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an outline of a charging system for an electric vehicle according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a current collecting arm portion of the forklift according to the present embodiment.

FIG. 3 is a partial perspective view showing a state where a current collecting arm and a trolley wire according to the present embodiment are in contact with each other.

FIG. 4 is a schematic diagram showing body guidance of a charging system for an electric vehicle according to a modification.

[Explanation of symbols]

 1 Forklift 2 Stationary Charger 3 Current Collection Arm 4 Trolley Wire 5 Battery 11 Power Supply

Claims (1)

[Claims] 1. An electric vehicle driven by a battery power source,
A charging system for an electric vehicle, comprising a stationary charging device for charging a battery of the electric vehicle, wherein the stationary charging device is provided with a trolley wire to which a charging power source is supplied, and the electric vehicle is charged with a battery. A charging system for an electric vehicle, comprising: a current collecting arm for collecting a current; and a battery of the electric vehicle is charged by bringing the trolley wire into contact with the current collecting arm.