JP2001338638A - Cylindrical battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cylindrical battery in which reverse connection can be easily prevented for connecting plural batteries in series by changing part of components of the conventional batteries. SOLUTION: A part of the outer circumference of the negative pole 2 surface contacting with the electric apparatus using the battery is covered with a resin film 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical battery that can prevent reverse connection when a plurality of batteries are used in series.

[0002]

2. Description of the Related Art In a cylindrical primary battery represented by an alkaline dry battery, when replacing a battery, a consumer takes out an old battery from a device and replaces it with a new battery, but the number of batteries connected in series is large. In such a case, the consumer may mistakenly set at least one battery with the plus and minus reversed, without being set in the device normally.

[0003] In this case, if the switch is turned on and used as it is, the other batteries set normally are discharged,
The battery set in reverse is charged with the polarity reversed. However, since the primary battery is not made for charging, a battery set upside down as described above has a problem that gas is generated inside the battery and the internal pressure rises, leading to leakage or rupture. was there.

[0004] In order to solve the above-mentioned problems, in the case of the AA batteries and the AA batteries, a method of slightly recessing the negative electrode terminal surface of the batteries or a method disclosed in Japanese Patent Application Laid-Open No. 9-161762 is disclosed. There is a method of providing an insulating protrusion on the negative electrode terminal surface, and when either method is reversely connected, by preventing the negative electrode terminal surfaces from directly contacting each other, the electric circuit is interrupted, and the reverse connection is prevented. Things.

However, when the above-described method is applied to a small battery such as an AA battery or an AAA battery, the negative electrode terminal surface is small. In some cases, the negative electrode terminal of the battery does not contact the terminal on the device side, which causes a problem that the device cannot be used.

For example, the battery shown in FIG. 8 is an AA battery, in which the negative terminal 5 is recessed from the end face of the battery so that when the battery is reversely connected, the electrical connection is cut off and the battery leaks or ruptures. However, if the negative terminal on the device side is a flat terminal, even if multiple batteries are properly connected and loaded, the negative terminal surface of the battery is concave, The terminal and the battery terminal are not connected, and the equipment cannot be used.There is no way to release this state.In the event that the battery is reversely connected, leakage or rupture of the battery can be prevented, but the usable equipment is limited. The problem remains.

On the other hand, FIG. 9 shows a case where a resin protruding member 51 is erected on the negative electrode terminal surface of an AA battery and is reversely connected, similarly to the case of FIG. Although the connection is cut off to prevent battery leakage and rupture, if the negative terminal on the device side is a flat terminal, even if multiple batteries are normally connected and loaded, Due to the protrusion, the terminal of the battery corresponding to the terminal becomes in a state where the device cannot be used, and there is no means for releasing this state, so that the device that can be used is limited.

[0008]

SUMMARY OF THE INVENTION In view of the above-mentioned prior art, the present invention has been developed for small batteries such as AA batteries and AAA batteries as well as AA batteries and AA batteries. In the case where the reverse connection can be prevented and the device cannot be used due to the terminal structure of the device, the reverse connection prevention member is easily removed to provide a cylindrical battery capable of using the device. It is an issue.

[0009]

In order to solve the above-mentioned problems, a cylindrical battery according to the present invention has a structure in which a part of an outer peripheral portion of a negative electrode terminal surface which comes into contact with a battery-using device is covered with a resin film. It is characterized by the following.

That is, the cylindrical battery of the present invention has a structure in which a part of the outer periphery of the negative electrode terminal surface is covered with a resin film, and the exposed negative electrode terminal surface is recessed from the portion covered with the resin film. In the case where a plurality of the batteries are connected in series and one of them is incorrectly connected in reverse, the battery is not electrically connected on the surface where the negative electrode terminal surfaces are in contact with each other, and the battery is connected in reverse. Since the battery is not charged by another battery, the battery can be prevented from leaking or bursting.

When the connection terminal of the device is a flat terminal, the negative electrode terminal surface is covered with the resin film even if the connection is performed normally, so that the negative electrode terminal surface is in a recessed state. The connection between the negative electrode terminal and the device becomes unusable, but in such a case, the resin film covering a part of the negative electrode terminal surface is peeled off to completely expose the negative electrode terminal surface. This allows the device to operate normally.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a cross section of a main part showing an example of the structure of the cylindrical battery of the present invention, FIG. 2 is a perspective view showing a negative electrode terminal surface of the battery of FIG. 1, and FIG. FIG. 4 is a view showing a state in which one battery is reversely connected in the state of FIG. 3, and FIG. 5 is a view showing a connection portion (circled portion) of the reversely connected battery in FIG. FIG. 6 is a cross-sectional view of a state in which the negative electrode terminal of the battery of FIG. 1 is connected to a terminal of the device. FIG. 7 is a diagram illustrating a state in which a resin film coated on a part of the negative electrode terminal surface of the battery of FIG. 8 and 9 are perspective views showing a negative electrode terminal surface of a conventional cylindrical battery.

In the figure, 1 is an outer can containing a battery main body, 2 is a negative terminal of the battery, 3 is a positive terminal of the battery, 4 is an outer label, 41 is an outer label 4 integrated with the outer label 4 on the outer periphery of the negative terminal 2. The coated resin film 42 is a peeling line formed of perforations provided on the resin film 41, and the peeling line 42 allows the resin film 41 to be easily peeled off when the front surface of the negative electrode terminal 2 needs to be exposed. As described above, a cylindrical battery according to an example of the present invention is configured. The resin outer label 4 is an electrically insulating and heat-shrinkable resin such as PET or PVC. After the film is wound around the battery, the film is heated and shrunk to adhere to the battery.
The exposed surface of the negative electrode terminal 2 is recessed by the thickness of the resin film 41 from the portion covered with the resin film 42.

The operation when the cylindrical battery constructed as described above is loaded in a device will be described as follows. FIG. 3 shows a state in which four batteries A, B, C, and D are normally connected in series, and FIG. 4 shows an example in which B is incorrectly connected in reverse of the four batteries. Is shown.
In the state shown in FIG. 4, the negative terminal 2 of the battery B connected in reverse is connected to the normally connected battery A as shown in FIG.
Although the negative electrode terminal 2 is in contact with the negative electrode terminal surface, the negative electrode terminal 2 is not contacted because the surfaces of the negative electrode terminal 2 are recessed from each other by the portion covered with the resin film 42, so that the electrical connection is interrupted. The current does not flow even if it is inserted. Therefore, since no abnormality occurs in the battery and the device does not operate, the user notices that the battery has been reversely connected, and by replacing the battery B, the battery leaks or ruptures. Accidents can be prevented.

However, when the minus terminal on the device side is a flat terminal t as shown in FIG. 6, even if the battery of the present invention is normally loaded, the terminal t of the device is flat and the terminal 2 of the battery is also on the surface. Is covered by the resin film 41, and thus is recessed by the thickness of the resin film 41, so that the terminal t of the device and the surface of the terminal 2 of the battery are not connected, and the device cannot be used. . In such a case, the negative electrode terminal 2
If the resin film 41 covering a part of the surface is peeled off from the peeling line 42 and then loaded into the device again, the resin film 41 which insulated the surface of the negative electrode terminal 2 disappears, and the entire surface of the negative electrode terminal 2 is removed. Since the device is exposed, connection is possible even if the minus terminal t of the device is flat, and the device can be used normally.

[0016]

The present invention is as described above. Since the outer peripheral portion of the negative electrode terminal surface in contact with the battery-powered device is covered with the resin film, the exposed portion of the negative electrode terminal surface in contact with the device terminal is recessed. Therefore, when multiple batteries are connected in series, the negative electrode terminal surfaces of the batteries do not come into contact even if they are connected incorrectly, thus preventing accidents such as liquid leakage or rupture due to charging, and If the negative terminal is a flat terminal and the negative terminal is not connected to the flat terminal by a resin film, the device can be used normally by peeling the covering portion from the peeling wire provided on the resin film.

[Brief description of the drawings]

FIG. 1 is a front view in cross section of a main part showing the structure of an example of a cylindrical battery of the present invention.

FIG. 2 is a perspective view of a main part of the battery of FIG.

FIG. 3 is a diagram showing a state in which a plurality of batteries of the present invention are accurately connected in series.

FIG. 4 is a diagram showing a state in which one battery is reversely connected in the state of FIG. 3;

FIG. 5 is an enlarged cross-sectional view of a connection portion of the battery connected in reverse in FIG. 4;

FIG. 6 is a sectional view showing a state where the negative electrode terminal of the battery of FIG.

7 is a cross-sectional view of a state in which the resin film covering a part of the negative electrode terminal surface of the battery of FIG. 1 is peeled off and the negative electrode terminal is connected to a device.

FIG. 8 is a perspective view clearly showing a negative electrode terminal surface of an example of a conventional cylindrical battery.

FIG. 9 is a perspective view clearly showing a negative electrode terminal surface of another conventional cylindrical battery.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer can 2 Negative terminal 21 Projection 3 Positive terminal 4 Outer label 41 Resin film 42 Peeling wire

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5H011 AA13 BB03 CC01 DD21 5H022 AA07 CC01 CC09 KK04 5H024 CC02 DD01 DD11 5H040 AA18 AS11 FF01

Claims (4)

[Claims] 1. A cylindrical battery, wherein a part of an outer peripheral portion of a negative electrode terminal surface in contact with a battery-using device is covered with a resin film. 2. The cylindrical battery according to claim 1, wherein the resin film covers a part of the negative electrode terminal surface except for a hole smaller than the outer shape of the negative electrode terminal. 3. The cylindrical battery according to claim 1, wherein the resin film is releasably coated from the negative electrode terminal surface. 4. The cylindrical battery according to claim 1, wherein the resin film is formed integrally with an outer label of the battery, and is releasably coated to a position where the entire negative electrode terminal surface is exposed.