JPH09306535A - Battery for automatic carrying car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent malfunction of a magnetic sensor even if a run control signal and an operation control signal are received with magnetism from a path side, and enhance accuracy of the position control of an automatic carrying car by using a battery in which a battery electrode made of a magnetic material which polarizes in a manufacturing process is demagnetized. SOLUTION: A battery unit 1 mounted on an automatic carrying car is constituted in such a way that a cathode plate and an anode plate constituting an electrode plate are alternately arranged in a layer state, housed in a battery unit container 3, and immersed in an electrolyte filled in the container. When the electrode plate is housed in the container 3, the container 3 is divided into an upper container 3a and a lower container 3b, the electrode plate is housed in the lower container 3b, then the upper container is set, and the joining part is welded. Magnetization generating in the manufacturing process of a battery electrode of a battery in which a magnetic material such as nickel and iron is used on the electrode plate is demagnetized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery for an automated guided vehicle, and more particularly to a battery for an automated guided vehicle that can demagnetize a battery electrode to eliminate a malfunction of a magnetic sensor and perform accurate control.

[0002]

2. Description of the Related Art Conventionally, an automatic guided vehicle has been used for automatically carrying a conveyed article in a factory, a warehouse or the like. In this automatic guided vehicle, a battery mounted on a vehicle body is used to drive or control an electric motor for moving wheels or an electric motor for unloading for traveling or unloading work.
Then, in such an automated guided vehicle, the magnetic field created by the magnetic tape made up of permanent magnets and small magnets of the guideway installed on the floor is detected by the magnetic sensor mounted on the vehicle body to detect the position of the vehicle body, The in-vehicle motor is automatically controlled.

[0003]

The above-mentioned conventional battery for an automatic guided vehicle is used by being mounted on the vehicle body of the guided vehicle, and there is a battery in which a magnetic material is used for its electrodes.
For example, in an iron-nickel battery in which nickel is used as the electrode material and iron is used as the cathode material, the nickel and iron used as the electrode material are magnetized and magnetized due to the large current used for electric welding in the battery manufacturing process. When incorporating such a magnetized battery electrode into a battery, the magnetized battery electrode forms a magnetic field. The magnetic field produced by the battery electrode is superimposed on the magnetic field produced by the magnetic tape made up of permanent magnets and small magnets used as a guide path installed on the floor. As a result, the distribution of the magnetic field detected by the magnetic sensor mounted on the vehicle body differs from the previously assumed magnetic field distribution, causing an error in the detection of the vehicle body position by the magnetic sensor, and accurate position control of the automated guided vehicle. There was a problem that it would be difficult.
The present invention solves the problems of the conventional battery for an automated guided vehicle, reliably demagnetizes a magnetized battery electrode that cannot be avoided in the manufacturing process, by a simple method, and accurately positions the automated guided vehicle. It is an object of the present invention to provide a battery for an automated guided vehicle that can be controlled.

[0004]

In order to achieve the above object, the battery for an automatic guided vehicle of the present invention is a battery mounted on an automatic guided vehicle and used as a power source, and is magnetized during a manufacturing process. The battery is characterized in that the battery electrode made of a magnetic material is demagnetized.

In the battery for an automatic guided vehicle of the present invention having the above-mentioned structure, the battery electrodes are demagnetized in advance, so that the traveling control,
Even if the work control signal is magnetically received from the road side, the magnetic sensor does not malfunction and the control accuracy is improved.

In this case, a coil is wound around the battery unit formed by housing the electrode plate in the battery container, and the amplitude of the alternating current is gradually reduced while flowing the alternating current through the coil. Then, the electrodes can be demagnetized.

The battery for an automated guided vehicle of the present invention having the above-mentioned structure can surely demagnetize the magnetic field magnetized in the manufacturing process by a simple method.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a battery for an automatic guided vehicle according to the present invention will be described below with reference to the drawings. One unit 1 of the battery mounted on the automated guided vehicle shown in FIG.
The anode plate 2a and the cathode plate 2b constituting the electrode plate 2 shown in FIG. 2 are alternately arranged to form a layer and then housed in the battery unit container 3 as shown in FIG. 3 to fill the container. It is constructed by immersing it in the prepared electrolytic solution. Then, a battery action is generated at this electrode. When the electrode plate 2 configured as described above is housed in the container 3, the container 3 is placed in the upper container 3a as shown in FIG.
And the lower container 3b are separated from each other, the electrode plate 2 is housed in the lower container, and then the upper and lower containers are overlapped to join and weld the overlapped portion. Electric welding is usually used for welding.

As the electrode material, nickel is used for the anode plate 2a,
In an iron-nickel battery that uses iron for the cathode plate 2b, such a nickel or iron electrode material is magnetized and magnetized by a large current flowing through the welded portion 4 when the upper and lower containers are electrically welded. The magnetized battery electrodes generate a magnetic field, which causes an error magnetic field in the magnetic field distribution created by the magnetic tape made of permanent magnets and small magnets installed at a predetermined position on the floor to detect the accurate position of the automated guided vehicle. And superimpose.

According to the present invention, the battery electrode, which is mounted on an automated guided vehicle and is used as a power source for an electric motor, in which a magnetic material such as nickel or iron is used for the electrode plate as described above, is manufactured. It demagnetizes the magnetization that sometimes occurs. With this demagnetization, the battery electrode does not generate a magnetic field even when mounted on an automated guided vehicle, and even if there is, it can be stopped to a minute magnetic field.

FIG. 4 shows an embodiment of a battery degaussing device for degaussing a magnetized battery electrode. A coil 5 is wound around one or a plurality of bundled battery units 1 and an alternating current is passed through this coil, and the amplitude of the alternating current varies from a value at which the peak value of the alternating current is sufficient to magnetically saturate the battery electrodes. Gradually reduce the size of. This is shown in FIG.

In FIG. 5, B is the magnetic flux density in iron,
H indicates the strength of the magnetic field created by the coil. Battery unit 1 now
In Fig. 5, if there is a magnetization as shown at point A, the value of the peak value of the alternating current of the coil 5 is set to the value B point at which the battery electrode is sufficiently magnetically saturated. Apply an electric current and change the amplitude of this alternating current to C
Point, D point, E point, F point, etc.
Finally, demagnetization is performed at the 0 point position. By doing so, the magnetic battery electrode can be demagnetized along the BH curve. If the magnetic electrode can be demagnetized, the error magnetic field given to the magnetic field distribution created by the magnetic tape made of permanent magnets and small magnets installed at a predetermined position on the floor can be gradually reduced, so that accurate position control of the automatic carrier can be realized.

[0013]

According to the battery for an automatic guided vehicle of the present invention, since the battery electrode is degaussed in advance, the magnetic tape made of permanent magnets installed at a predetermined position on the floor and the magnetic field distribution created by the small magnets are distributed. There is an advantage that the error magnetic field given can be gradually reduced, the magnetic sensor does not malfunction even when the traveling control and work control signals are magnetically received from the traveling road side, etc., and the accuracy of the position control of the automatic guided vehicle is improved. Further, according to the battery for an automated guided vehicle of claim 2, the magnetic field magnetized in the manufacturing process can be surely demagnetized by a simple method.

[Brief description of drawings]

FIG. 1 is a diagram showing a battery unit mounted on an automated guided vehicle of the present invention.

FIG. 2 is a diagram showing a battery electrode of a battery for an automated guided vehicle of the present invention.

FIG. 3 is a diagram showing a battery unit.

FIG. 4 is a diagram showing an embodiment of a battery degaussing device for a battery for an automated guided vehicle according to the present invention.

FIG. 5 is a B-H curve diagram.

[Explanation of symbols]

 1 Battery Unit 2 Electrode 2a Anode 2b Cathode 3 Battery Container 3a Upper Container 3b Lower Container 4 Electric Welding Part

Claims (2)

[Claims] 1. A battery for use as a power source when mounted on an automated guided vehicle, wherein the battery electrode made of a magnetic material that is magnetized during a manufacturing process is a degaussed battery. battery. 2. A battery in which a battery electrode is demagnetized has a coil wound around a battery unit formed by housing an electrode plate in a battery container, and the amplitude of the alternating current is increased while applying an alternating current to the coil. The battery for an automatic guided vehicle according to claim 1, wherein the electrode is demagnetized by gradually decreasing