JPH09161762A - Negative electrode terminal of cylindrical battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce malfunctions by preventing erroneous connection of a battery in series, and coping even with a connecting plate terminal. SOLUTION: A cylindrical battery 10 has a negative electrode terminals 2 on one end surface. This negative electrode terminal 2 has a flat terminal surface 4, and insulating projections 14 are arranged at intervals in three places in a peripheral edge part of this terminal surface 4. The respective insulating projections 14 are formed of an insulating material such as synthetic resin and a paper material or a rubber material. When this battery 10 is housed in a battery housing part in an electronic equipment or the like, a connecting terminal which is arranged in the battery housing part and whose contact surface of, for example, a plate terminal or the like is flat can contact a terminal surface of the negative electrode terminal 2 through the mutual insulating projections 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a negative electrode terminal of a cylindrical battery represented by an alkaline battery or a manganese dry battery, and more particularly, to a negative electrode terminal capable of preventing erroneous battery connection when a plurality of batteries are arranged in series. Regarding the improvement of.

[0002]

2. Description of the Related Art Cylindrical batteries such as AA type batteries and AA type batteries typified by alkaline batteries and manganese dry batteries have a negative electrode terminal having a flat terminal surface on one end surface and a positive electrode having a convex shape on the other end surface. Each terminal is provided. A plurality of such cylindrical batteries are usually used by being connected in a straight line in series. At this time, each of the arranged cylindrical batteries has its positive electrode terminal or negative electrode terminal brought into contact with a different-polarity terminal of another battery adjacent to each other, and all the batteries are arranged so that their polar directions match.

However, when connecting the batteries in series as described above, at least one of the plurality of batteries is
The user may mistakenly put the positive electrode side and the negative electrode side of the battery in the opposite polarity direction. At this time, the incorrectly arranged batteries are connected to the other batteries adjacent to each other with the same polarity. Therefore, a voltage formed by another battery is applied between the terminals of the batteries that are erroneously arranged, and the battery is in a charged state, which may cause heat generation or gas generation inside the battery.

Therefore, in order to solve such a problem, a battery as disclosed in Japanese Patent Laid-Open No. 7-201314 has been proposed. As shown in FIG. 11, this battery has an annular insulating portion 6 along the peripheral edge of the terminal surface 4 of the negative electrode terminal 2. When this battery is misaligned, the annular insulating portion 6 abuts the negative electrode side end surface of another battery adjacent to each other to prevent the connection between the negative electrode terminals 2 of both batteries, and the battery is misconnected. It is designed to prevent On the other hand, the inner diameter of the annular insulating portion 6 is set to be larger than the outer diameter of the positive electrode terminal, and when the batteries are correctly arranged, the positive electrode terminals of other adjacent batteries are connected to the negative electrode terminal 2 through the inner side of the annular insulating portion 6. Get in touch.

[0005]

By the way, connection terminals having various terminal shapes are provided in the battery housing portion provided on the electronic device side, and among the connection terminals,
For example, there is a flat plate terminal having a flat contact surface with the negative electrode terminal.

However, in the case of the battery, when the battery is accommodated in the battery accommodating portion provided with such a contact terminal having a flat contact surface, it is obstructed by the annular insulating portion despite being correctly inserted. However, there is a problem that the negative electrode terminal and the connection terminal are not connected. That is, when the connection terminal is, for example, a flat plate terminal,
As shown in (a) and (b), the flat plate terminal 8 is brought into contact with the annular insulating portion 6 of the battery and cannot enter the inside of the annular insulating portion 6, so that the negative electrode terminal 2 and the flat plate terminal 8 are separated from each other. The situation occurs that the connection is not established. In particular, the battery cannot cope with this kind of connection terminal (for example, the flat plate terminal 8 etc.) at all, so that the above-mentioned problems frequently occur.

The present invention has been made in view of the above circumstances, and an object thereof is to prevent an erroneous connection with another battery even if the batteries are misaligned when connected in series. Even if the connection terminal of the storage part is like a flat plate terminal,
An object of the present invention is to provide a negative electrode terminal of a tubular battery that can deal with this and can reduce the occurrence of defects as much as possible.

[0008]

In order to achieve the above object, in a negative electrode terminal of a cylindrical battery according to the present invention, a negative electrode terminal having a flat terminal surface at one end surface of the cylindrical battery is provided. , Three insulating protrusions are provided on the peripheral edge portion of the terminal surface at intervals, and when the negative electrode side end faces of the two cylindrical batteries are abutted against each other, both insulating protrusions are opposite to each other on the negative electrode side. A contact terminal that is in contact with the end face so that a gap can be formed between both of the negative electrode terminals and that is provided in the battery housing portion when the tubular battery is housed in the battery housing portion. Can contact the terminal surface through the insulating protrusions.

As a result, in the tubular battery, when a plurality of batteries are arranged in series in a straight line, even if at least one of the batteries is erroneously arranged in the opposite polarity direction, the negative electrode Since the insulating protrusions of the terminals are brought into contact with the negative electrode side end surfaces of the adjacent batteries to form a gap between the negative electrode terminals, it is possible to prevent the incorrectly arranged batteries from being erroneously connected. Furthermore, when the tubular battery is stored in the battery compartment, even if the connection terminals of the battery compartment are flat terminals,
Since it is possible to make contact with the negative electrode terminal through the insulating protrusions, it is possible to reduce the occurrence of the problem that the negative electrode terminal and the connection terminal are not connected.

Further, since the insulating protrusions are provided at three positions at 120 ° intervals along the peripheral edge of the terminal surface of the negative electrode plate, the two batteries are abutted against each other in a well-balanced manner, and mutual stability is ensured. You can definitely do better.

Furthermore, if the insulating protrusions are formed by coating an ultraviolet curable resin or sticking a polyester film, the insulating protrusions can be provided inexpensively and easily.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a negative electrode terminal of a tubular battery according to the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the same components as those of the related art are designated by the same reference numerals. The cylindrical battery of the present invention is a single type (LR20) or single two typified by an alkaline battery or a manganese dry battery.
The battery has a cylindrical outer shape such as a mold (LR14).

FIG. 1 shows a cylindrical battery 10 as an example of a cylindrical battery. The cylindrical battery 10 has a negative electrode terminal 2 on the upper end surface and a convex positive electrode terminal 12 on the lower end surface. The negative electrode terminal 2 is a flat circular terminal surface 4
have. The peripheral portion of the terminal surface 4 is shown in FIG.
As shown in (b) and (b), the insulating protrusions 14 are integrally provided at three locations. The three insulating protrusions 14 are provided on the terminal surface 4
Are arranged at equal distances from the center of and are arranged every 120 degrees along the peripheral edge of the terminal surface 4. Each insulating protrusion 14 is formed in a dot shape, and has a diameter of 3 mm and a height of 0.1 mm, for example.
About the size. These insulating protrusions 14 are
It is formed of an insulating material such as synthetic resin, paper material, or rubber material. In particular, this formation is performed at a relatively low cost and is very simple by applying a UV curable resin or adhering a polyester film (PET film).

In addition, the three insulating protrusions 14 are arranged at positions separated by a predetermined distance or more from the center of the terminal surface, and when a plurality of batteries 10 are arranged in series as shown in FIG. , The positive electrode terminal 12a of another battery 10a adjacent to each other
Enter the inside of the three insulating protrusions 14 and the negative electrode terminal 2
It can be brought into contact with the central portion of the terminal surface 4.

In such a battery 10, when a plurality of batteries 10 are connected in series, as shown in FIG.
Even if the books are erroneously arranged in the opposite direction, the mis-arranged battery 10b is prevented from being connected to another battery 10c adjacent thereto. That is, as shown in FIG. 4B, the misaligned battery 10b is abutted with the negative electrode side end surface of the other battery 10c adjacent to each other so that the negative electrode side end surface of the two batteries 10b and 10c are insulated from each other. 14b and 14c are
Each is brought into contact with the other end face of the negative electrode. As a result, a gap 16 is formed between the negative electrodes 2b and 2c of the two batteries 10b and 10c, and the two batteries 10b and 10c.
The mutual connection of c is blocked. As a result, the misaligned battery 10b is prevented from being charged and gas generation and liquid leakage are prevented, so that the safety of the battery can be improved in the same manner as the conventional one.

In particular, since the insulating protrusions 14 are provided at three places at intervals, the negative electrode side end faces of the two batteries are abutted to each other as compared with the case where they are provided at one place or two places. Then, the mutual stability becomes extremely good. That is, as shown in FIG. 5A, when the insulating protrusion 14 is provided at one place, when the negative electrode side end surfaces of the two batteries are butted against each other,
As shown in (b), the contact positions of the insulating protrusions 14d and 14e may be close to each other, and the mutual stability of the two batteries 10d and 10e may be deteriorated. At this time, the negative electrodes 2d and 2e of the two batteries 10d and 10e may contact each other. On the other hand, the insulating protrusion 14 is
Even in the case where the two batteries are provided as shown in FIG. 6A, the contact positions of the two insulating protrusions 14f and 14g are close to each other as shown in FIG. Mutual stability becomes worse at 10f and 10g,
The negative electrode terminals 2f and 2g may come into contact with each other. On the other hand, in the case where the insulating protrusions 14 are provided at three places, the contact is performed at three or more points even when the contact positions of the insulating protrusions 14 are close to each other, so that mutual stability is improved. Is surely improved, and contact between the negative electrode terminals is reliably prevented.

When the battery 10 is housed in a battery housing such as an electronic device, the connection terminal for the negative electrode provided in the battery housing passes through the inside of the three insulating protrusions 14 to form the negative electrode. The terminal surface 4 of the terminal 2 can be contacted. Here, as the connection terminals that come into contact with each other through the insides of the three insulating protrusions, for example, the spring terminal 18 shown in FIG. 7 or the leaf spring terminals 20, 2 shown in FIGS. 8 and 9 are used.
There are 2 etc. The spring terminal 18 is elastically urged when the battery 10 is stored, and the tip end portion 18 a enters inside the three insulating protrusions 14 and comes into contact with the terminal surface 4 of the negative electrode terminal 2. The same applies to the leaf spring terminals 20 and 22, and the battery 1
The contact portions 20a and 22a formed integrally with the leaf spring terminals 20 and 22 are elastically urged by the storage of 0, and are 3
It goes into the inside of one insulating protrusion 14 and contacts the terminal surface 4 of the negative electrode terminal 2.

In addition, in the contact terminal, in addition to the inside of the three insulating protrusions 14 as described above, the terminal surface 4 of the negative electrode terminal 2 is also passed through each of the insulating protrusions 14.
Can be contacted. Here, as the connection terminal that comes into contact with the terminal surface 4 of the negative electrode terminal 2 through the insulating protrusions 14, for example, a strip-shaped elongated flat plate terminal 8 as shown in FIGS. and so on. This flat plate terminal 8 is
It is inserted between the insulating protrusions 14 and contacts the terminal surface 4 of the negative electrode terminal 2. The flat plate terminal 8 can be easily inserted, for example, by relatively rotating the battery 10 around its axis.

As described above, in the battery 10, the connection terminal of the battery housing portion is provided on the terminal surface 4 of the negative electrode terminal 2 not only through the inside of the three insulating protrusions 14 but also between the insulating protrusions 14. Since the terminals can be in contact with each other, even if the connection terminals are like the flat plate terminals 8, it is possible to cope with the problem, and it is possible to reduce the occurrence of the problem that the negative electrode terminal 2 and the connection terminal are not connected.

In particular, if the insulating protrusions 14 are arranged at a position as far as possible from the center of the terminal surface 4, for example, in the vicinity of the peripheral edge of the terminal surface 4, it is possible to secure a wider mutual spacing between the insulating protrusions 14. Therefore, it becomes possible to deal with a wider flat plate terminal and the like, and therefore the occurrence of the above-mentioned problems can be further reduced.

Incidentally, the arrangement of the three insulating protrusions 14 is not necessarily limited to every 120 degrees, but what is required is that the mutual stability is surely good when the two batteries 10 are butted. Other arrangement forms may also be used.

[0022]

As described above in the embodiments of the invention, according to the negative electrode terminal of the tubular battery of the present invention, the insulating protrusions are provided at the three peripheral portions of the terminal surface at intervals. Therefore, even when at least one of the batteries is misaligned when the batteries are arranged in a straight line, the misaligned negative electrode terminal of the battery and the negative electrode terminal of the adjacent battery Since the gap is formed by interposing the insulating protrusion between the battery and the battery, incorrect connection of the battery can be prevented, gas generation and liquid leakage due to charging can be reduced, and the safety of the battery can be improved in the same way as in the past. Can be planned. Moreover, when the battery is stored in the battery storage portion, even if the connection terminal of the battery storage portion is a flat plate terminal or the like, it is possible to make contact with the terminal surface of the negative electrode terminal between the insulating protrusions.
It is possible to reduce the occurrence of the problem that the negative electrode terminal and the connection terminal are not connected.

In addition, since the insulating protrusions are provided at three positions every 120 degrees along the peripheral edge of the terminal surface of the negative electrode plate,
The two batteries are butted against each other in a well-balanced manner, and mutual stability can be surely improved.

Furthermore, by forming the insulating protrusions by applying a UV-curable resin or sticking a polyester film, the insulating protrusions can be provided inexpensively and easily.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a cylindrical battery.

FIG. 2 (a) is a top view showing an end face on the negative electrode side of a tubular battery. (B) It is the side view which showed the negative electrode side of the cylindrical battery.

FIG. 3 is a side view showing a connection between a positive electrode terminal and a negative electrode terminal when a plurality of cylindrical batteries are arranged in series.

FIG. 4 is an explanatory diagram showing a state in which one of a plurality of cylindrical batteries arranged in series is erroneously arranged.

FIG. 5 (a) is a top view showing an end face on the negative electrode side of a cylindrical battery provided with one insulating protrusion. (B) It is explanatory drawing which showed the example of the short circuit of the cylindrical battery in which the insulating protrusion was provided in one place.

FIG. 6 (a) is a top view showing an end face on the negative electrode side of a cylindrical battery provided with two insulating protrusions. (B) It is explanatory drawing which showed the example of the short circuit of the cylindrical battery in which the insulating protrusion was provided in two places.

FIG. 7 is a side view showing a state in which a spring terminal contacts a negative electrode terminal of a tubular battery.

FIG. 8 is a side view showing a state in which a leaf spring terminal is connected to a negative electrode terminal of a tubular battery.

FIG. 9 is a side view showing a state in which another leaf spring terminal is connected to a negative electrode terminal of a tubular battery.

FIG. 10 (a) is a top view showing a state in which the flat plate terminal is connected to the negative electrode terminal of the tubular battery. (B) It is the side view which showed a mode when a flat plate terminal was connected to the negative electrode terminal of a cylindrical battery.

FIG. 11 is a perspective view showing a conventional cylindrical battery.

FIG. 12 (a) is a top view showing a state of a negative electrode terminal and a flat plate terminal of a battery when a conventional cylindrical battery is stored in a battery housing portion having a flat plate terminal. (B) It is the side view which showed the mode of the negative electrode terminal and flat plate terminal of the battery when the conventional cylindrical battery was stored in the battery storage part provided with the flat plate terminal.

[Explanation of symbols]

2 Negative electrode terminal 4 Terminal surface 6 Annular insulating part 8 Flat plate terminal (connection terminal) 10 Cylindrical battery 12 Positive electrode terminal 14 Insulation protrusion 16 Gap 18 Spring terminal 20 Leaf spring terminal 22 Leaf spring terminal

Claims (3)

[Claims] 1. In a negative electrode terminal (2) having a flat terminal surface (4) on one end surface of a tubular battery (10), an insulating protrusion (14) is provided at a peripheral portion of the terminal surface (4). When the negative electrode side end faces of the two cylindrical batteries (10) are butted against each other, the insulating protrusions (14) of both sides are respectively brought into contact with the other negative electrode side end faces. A gap (16) can be formed between both of the negative electrode terminals (2) and is provided in the battery housing portion when the tubular battery (10) is housed in the battery housing portion. A negative terminal of a tubular battery, characterized in that the connection terminal (8) can come into contact with the terminal surface (4) through the insulating protrusions (14). 2. The negative electrode for a tubular battery according to claim 1, wherein the insulating protrusions (14) are provided at three locations along the peripheral edge of the terminal surface (4) at intervals of 120 degrees. Terminal. 3. The negative terminal of the tubular battery according to claim 1, wherein the insulating protrusions (14) are formed by applying an ultraviolet curable resin or adhering a polyester film.