JPH08222201A - Battery - Google Patents

Abstract

PURPOSE: To obtain batteries which can be connected in series and detachably at low resistance. CONSTITUTION: A male screw portion 13 (or a female screw portion) is formed in a positive terminal 11. A female screw portion 23 (or a male screw portion) to portion 23 (or a male screw portion) to be screwed into it is formed in a negative pole terminal 20. The male screw portion 13 and the female screw portion 23 are so positioned that batteries 1 will be put one on the other in vertical direction or juxtaposed on the same plane, in mutual screwing. The negative pole terminal 20 having the female screw portion 23 (or the male screw portion) is preferably formed as a recess not to protrude from outer surface of the battery 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery having a structure that can be easily electrically connected in series.

[0002]

2. Description of the Related Art When two batteries are connected in series, a plurality of connecting plates 92 are used to reduce the resistance of the connecting portion and to suppress heat generation, as shown in FIG. Between the electrodes 911 and 912 or the lead wire 93 and the electrode 911 or 9
A method of connecting between 12 is known (actual Kaihei 6-90).
No. 55). Then, the connection plate 92 has electrodes 91
1, 912 are firmly joined to each other by spot welding, and the connecting plates 92 are also spot-welded.

As shown in FIGS. 5 and 6, a battery 90
Has been proposed (Japanese Utility Model Laid-Open No. 6-5111) in which the electrodes 913 and 914 facing each other are shaped so that they can be fitted to each other and a connection plate which is a separate member is not used. That is, one of the electrodes 913 is formed in a tubular shape forming the recess 919,
The other electrode 914 is formed into a cylindrical shape that fits into the recess 919. Then, as shown in FIG. 6, the other battery 90 is stacked on the one battery 90, and the two electrodes 913 and 914 are fitted and electrically connected.

[0004]

However, each of the above-mentioned conventional battery connection methods has the following problems. The first method (FIG. 4) using the connecting plate 92 is that when the current capacity of the battery increases (for example, several tens to 100 A), the connecting plate 9
The plate thickness of No. 2 increases, and the amount of heat required for welding to the electrode increases. As a result, the battery electrodes and container will be damaged by the heat generated during welding. Also, since the connecting plate is fixed to the battery by welding, it is difficult to replace it if one of the batteries fails.

The second method (FIG. 6) of fitting the electrodes 913 and 914 to each other has a large contact resistance between the electrodes, and therefore the amount of heat generated becomes large when the current becomes large, so that it cannot be used. There is also a problem that the fitting part is easily disengaged when a tensile force is applied. The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a battery having a low resistance, which can be firmly and detachably connected in series and which has an excellent interconnection function.

[0006]

According to the present invention, in a battery having a positive electrode terminal and a negative electrode terminal, a male screw portion or a female screw portion is formed on the positive electrode terminal, and the negative electrode terminal is screwed to the male screw portion or the female screw portion. A female screw part or a male screw part that can be screwed is formed, and the above-mentioned male screw part and female screw part that can be screwed into each other are a state in which two batteries are placed in parallel in the vertical direction or arranged side by side on the same plane. The battery is characterized in that it is provided at a position where it can be screwed.

It is to be noted that, in the above, the pole terminal provided with the female screw portion should be formed in a concave shape so as not to project from the outer surface of the battery around it, and the female screw portion should be formed from the outer surface side of the pole terminal toward the inside. Is preferred. With this configuration, the pole terminal with the female screw does not protrude from the outer surface of the battery, the space occupied by the battery is small, and the male screw of the opposite battery is screwed together. Occupies less space. The shape of the battery includes a box shape and a cylindrical shape.

[0008]

In the battery according to the present invention, the battery can be connected in series by screwing the female screw portion and the male screw portion. And, the attachment and detachment of batteries can be freely done,
Further, the attachment / detachment work can be easily performed manually. Also, since the female screw portion and the male screw portion are screwed together,
The contact area of both parts is significantly larger than the surface contact between flat surfaces (Fig. 6), the contact pressure is large, and the contact resistance of both parts is low.

Further, since the connecting method is screwing, it does not come off due to an external force as in the case of fitting, and both parts are firmly connected. As described above, according to the present invention, it is possible to provide a battery having low resistance, which can be firmly and detachably connected in series and which has an excellent interconnection function.

[0010]

【Example】

Example 1 In this example, as shown in FIG.
0 is a cylindrical battery 1 having. A male screw portion 13 is formed on the positive electrode terminal 11, and a female screw portion 23 that can be screwed into the male screw portion 13 is formed on the negative electrode terminal 20. Further, as shown in FIG. 2, the male screw portion 13 and the female screw portion 23 are provided at positions where they can be screwed to each other when the two batteries 1 are vertically mounted.

As shown in FIG. 1, the positive electrode terminal 11 is projectingly provided on a positive electrode case lid 31 having a safety valve, and a male screw portion 13 is formed on the upper portion thereof. On the other hand, the negative electrode terminal 20 is projectingly provided on the battery case 32 which is a negative electrode, and the female screw portion 23 is formed inside. As a result, as shown in FIG. 2, the male screw portion 13 and the female screw portion 23 are screwed to each other and the battery 1
The two can be connected in series.

Further, since the male screw portion 13 and the female screw portion 23 are screwed together, the contact area becomes large and the contact pressure is strong. As a result, the contact resistance is reduced, and there is no problem even if a battery with a large current capacity is connected. Further, the connected state is strongly held by screwing and is not pulled off by an external force. As described above, according to this example, it is possible to obtain the battery 1 which has a low resistance, can be firmly and detachably connected in series, and has an excellent interconnection function.

Embodiment 2 In this embodiment, as shown in FIG. 3, the negative electrode terminal 21 provided with the female screw portion 23 in Embodiment 1 is formed in a concave shape so as not to project from the outer surface of the battery 10, and the female screw portion 23 is formed. Negative electrode terminal 2
Cylindrical battery 10 formed from the outer surface side of 1 toward the inside
Is. The internal electrode 35 of the cylindrical battery 10 is arranged in a spiral shape, and the dead space 3 having a columnar shape is formed in the center thereof.
6 results. The negative electrode terminal 21 has a dead space 3
It is formed within 6.

As a result, when the battery 10 is placed in parallel in the vertical direction, the space generated between the bottom surface 101 of the upper battery 10 and the upper surface 102 of the lower battery 10 becomes small, and the entire occupied space is reduced. Can be made smaller. In addition, the battery 10 has an advantage that it can be stably placed on a flat surface without tilting the negative electrode terminal 21. Others are the same as in the first embodiment.

[Brief description of drawings]

FIG. 1 is a sectional view of a battery of Example 1.

FIG. 2 is a front view of the batteries of Example 1 connected in series.

FIG. 3 is a sectional view of the battery of Example 2.

FIG. 4 is a front view of a conventional battery connected in series.

FIG. 5 is a perspective view of another conventional battery.

6 is a front view of the batteries of FIG. 5 connected in series.

[Explanation of symbols]

 1,10. ． ． Battery, 11. ． ． Positive electrode terminal, 13. ． ． Male screw part, 20, 21. ． ． Negative electrode terminal, 23. ． ． Female thread,

Claims (3)

[Claims] 1. A battery having a positive electrode terminal and a negative electrode terminal, wherein the positive electrode terminal is formed with a male screw portion or a female screw portion, and the negative electrode terminal is capable of being screwed into the male screw portion or the female screw portion. Alternatively, a male screw portion is formed, and the male screw portion and the female screw portion which can be screwed with each other are located at a position where they can be screwed in a state where two batteries are vertically mounted or arranged side by side on the same plane. A battery that is provided. 2. The electrode terminal provided with the female screw portion is formed in a concave shape so as not to protrude from the outer surface of the battery around the battery, and the female screw portion is formed from the outer surface side of the electrode terminal. A battery characterized by being formed toward the inside. 3. The battery according to claim 1, wherein the outer shape of the battery is a substantially cylindrical shape.