JP2002313316A - Battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screwing structure low in cost and excellent in a connecting and disconnecting property on a battery to fix an installing member of a liquid plug, a liquid level sensor, etc., on a battery outer package by screwing. SOLUTION: This battery installed on a liquid port 4 which is an installing hole provided with the liquid plug 3 which is the installing member of the liquid port plug, a specific gravity sensor, etc., on a battery container is constituted by providing an outer peripheral screw part 3a on an outer periphery of this liquid plug 3, providing an inner peripheral screw part 4a on an inner periphery of the liquid port 4, fixing the liquid plug 3 on the liquid port 4 by screwing these outer peripheral screw part 3a and inner peripheral screw part 4a with each other, making a spiral 3b of the outer peripheral screw part 3a into a spiral provided with a plural number of rings of more than one round and making a spiral 4b of the inner peripheral screw part 4a into a spiral of less than one round.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery provided with a plug member of a liquid port plug or an exhaust plug, and / or sensors such as a temperature sensor and a liquid level sensor.

[0002]

2. Description of the Related Art A lead-acid battery for automobiles usually comprises six cells connected in series to constitute a 12V battery. Each cell is provided with a hole into which an electrolyte is injected. The holes are also used to replenish the electrolyte when the electrolyte level in the cell drops. When a normal battery is used, a liquid port plug and an exhaust plug having an exhaust function are mounted in this hole. Also, some batteries have electrolyte surface height, electrolyte specific gravity,
Some sensors are equipped with sensors for detecting the internal state of the battery, such as the temperature and the potential of the electrodes. Such a liquid port plug, an exhaust plug, and other sensors (hereinafter, referred to as mounting members) are mounted in the holes by screwing screws through a sealing material such as a rubber packing. Therefore, the hole functions as a mounting hole of the mounting member. The mounting hole is usually provided in a lid joined to a battery case that houses the electrode group.

[0003] Since it is necessary to provide a screw on the lid, a screw used to form the screw is provided in a mold used for molding the lid, and when the lid is removed from the mold, the screw is rotated and removed from the lid. There is a need. For this reason, the mold is complicated, and it takes time to remove the lid from the mold. As a result, it is inconvenient to reduce the price of the battery.

[0004]

SUMMARY OF THE INVENTION According to the present invention, in a battery in which a screw portion for mounting the mounting member as described above is provided on a battery container such as a lid, a mold used for molding the lid is simplified. The object of the present invention is to reduce the time required for molding to realize a low cost battery.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention is directed to a plug member such as a liquid port plug and an exhaust plug and / or a state inside a battery such as a liquid level sensor. A mounting member including a detection member for detecting the mounting member, in a battery provided with a mounting hole for mounting the mounting member in the battery exterior, provided with an outer peripheral thread portion on the outer circumference of the mounting member,
An inner peripheral screw portion is provided on an inner periphery of the mounting hole, and the outer peripheral screw portion and the inner peripheral screw portion are screwed together to fix the mounting member to the mounting hole. Spiral is 1
The battery according to the present invention is characterized in that the battery has a spiral that is not less than one circumference, and the spiral of the inner peripheral thread portion is less than one spiral.

According to a second aspect of the present invention, in the battery having the configuration according to the first aspect, a top surface of the mounting member and the mounting hole are provided in a state where the mounting member is mounted in the mounting hole. The outer edge of the mounting member constitutes the same plane, a flange portion is provided on the top surface of the mounting member, and in a state where the mounting member is mounted in the mounting hole, the outer peripheral screw portion and the inner peripheral screw portion are screwed from the screwed position. This also shows a battery in which the product of the number of threads and the pitch of the outer peripheral thread provided on the inside of the battery is larger than the thickness of the flange.

According to a third aspect of the present invention, there is provided a battery having the structure according to the second aspect, wherein an elastic packing is provided between the flange and the mounting hole. .

[0008]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1A is a top view of a liquid port plug as a mounting member of a battery according to one embodiment of the present invention, and FIG.
FIG. 1C is a cross-sectional view showing a main part of a liquid port which is a mounting hole before the liquid port plug is mounted, and FIG. 2 is a liquid port plug in the battery of one embodiment of the present invention shown in FIG. It is principal part sectional drawing which shows the state attached to the liquid port.

A lid 2 is joined to an opening of a battery case 1 for accommodating an electrode group (not shown). The battery case 1 is divided into a plurality of cell chambers by, for example, partition walls. A liquid port 4 for mounting a liquid port plug 3 is provided on the lid 2 corresponding to the cell chamber. The liquid port 4 is one form of the mounting hole specified in the claims. An inner peripheral thread portion 4 a is provided inside the liquid port 4.

In the present invention, the spiral 4b of the inner thread 4a is provided as an annular shape that is less than one circumference of the inner periphery of the liquid port 4. According to such a configuration, it is not necessary to rotate the mold corresponding to the inner peripheral thread portion 4a at the time of punching, so that
The structure of the mold can be simplified, and the time required for removing the die and molding can be reduced. In particular, when a plurality of liquid ports are provided as in a lead storage battery for an automobile, such an effect can be remarkably exhibited.
Further, an outer thread 3a corresponding to the inner thread 4a is formed on the outer periphery of the liquid port plug 3. The spiral 3b constituting the outer thread 3a is provided on the outer periphery of the liquid port plug 3 as one or more spirals. The mold for forming the outer thread 3a may be a simple two-part mold, and there is no need to rotate the mold when forming the outer thread 3a. Also, at least the outer peripheral screw portion 3 is formed so that the entire outer peripheral screw portion 3a can be screwed.
a, the spiral 3b is preferably formed as a plurality of annular rings.

A packing 5 having elasticity is provided so that the electrolyte inside the battery does not flow out from between the liquid port plug 3 and the liquid port 4. The packing 5 is always compressed in the thickness direction, so that the liquid tightness between the liquid port plug 3 and the liquid port 4 is maintained. When the battery is used for a long time, it is necessary to supply purified water from the liquid port due to a decrease in the electrolyte level. In this case, the liquid port plug 3 is once removed, and after replenishing the purified water, the liquid port plug is again supplied. 3 is attached to the liquid port 4. Since the packing 5 used for a long period of time is compressed in the thickness direction and has a reduced thickness, it is necessary to provide the spiral 3b downward, that is, toward the inside of the battery.

Further, the top surface 3c of the liquid port plug 3 attached to the liquid port 4 is configured to coincide with the top surface 2a of the lid 2, and the top surface 3c of the liquid port plug 3 has a plus or minus sign. A screw groove 6 is formed as shown in FIG. 1 (a), and a coin-shaped member is inserted into the screw groove 6, and the liquid port plug 3 is rotated so that the liquid port 4 is rotated.
Put on and take off. Liquid stopper 3 on top surface 3c of liquid stopper 3
It is very difficult to remove the liquid port plug 3 from the lid 2 because the finger knob for holding the liquid port is not formed. In a preferred configuration of the present invention, a flange 3d is provided on the top surface 3c of the liquid port stopper 3.
In the process of detaching the liquid stopper 3 from the lid 2, as shown in FIG. 3, the flange 3 d of the liquid stopper 3 is released when the screwing of the outer thread 3 a and the inner thread 4 a is released. Is the top surface 2 of the lid 2
It is configured to be located above a. That is, when the liquid port stopper 3 is attached to the liquid port 4, the outer thread 3
The outer peripheral screw portion 3a is configured to be lower than the lower end of the screw portion of the inner peripheral screw portion 4a with the thickness of the flange 3d or more. According to such a configuration, as shown in FIG. 3, during the detachment process of the liquid port plug 3, the outer peripheral screw portion 3a and the inner peripheral screw portion 4 are formed.
3 is formed between the liquid port 4 and the flange 3d at the time when the screwing with the a is released, a jig such as a screwdriver is inserted into the space 7 to insert the liquid. By pushing up the spout 3, the spout 3 can be easily removed from the spout 4. The packing 5 has an annular shape, and the flange 3 d is mounted between the lower surface and the peripheral surface 4 c of the liquid port 4.

The present invention can of course be applied to a mounting member to which various sensors such as an electrolyte specific gravity sensor and a temperature sensor in the cell are mounted in place of the liquid port plug.

[0015]

As described above, according to the structure of the present invention, in a battery in which a screw portion for mounting a mounting member such as a liquid stopper is provided on a battery container such as a lid, a mold used for molding the lid can be simplified. In addition, by shortening the time required for molding, it is possible to reduce the cost of the battery and to improve the detachability of the mounting member.

[Brief description of the drawings]

FIG. 1 is a cutaway sectional view showing a battery of the present invention.

FIG. 2 is a cutaway sectional view showing the battery of the present invention.

FIG. 3 is a diagram showing a process of detaching a mounting member in the battery of the present invention.

[Explanation of symbols]

 Reference Signs List 1 battery case 2 lid 2a top surface of lid 2 3 liquid port plug (mounting member) 3a outer peripheral thread 3b spiral of outer thread 3a 3c top surface of liquid port plug 3 3d flange 4 liquid port (mounting hole) 4a Peripheral thread part 4b Spiral of inner peripheral thread part 4a 4c Surrounding surface 5 Packing 6 Screw groove 7 Space

Continuing from the front page F-term (reference)

Claims (3)

[Claims] A mounting member including a plug member such as a liquid port plug and an exhaust plug and / or a detecting member such as a liquid level sensor for detecting a state in a battery, and a mounting hole for mounting the mounting member. In the battery provided on the battery exterior, an outer peripheral thread portion is provided on an outer periphery of the mounting member, and an inner peripheral thread portion is provided on an inner periphery of the mounting hole, and the outer peripheral thread portion and the inner peripheral thread portion are screwed together. The mounting member is fixed to the mounting hole, wherein the spiral of the outer peripheral thread is a spiral of one or more turns, and the spiral of the inner peripheral thread is a spiral of less than one turn. battery. 2. A top surface of the mounting member and an outer edge of the mounting hole form the same plane when the mounting member is mounted in the mounting hole, and a flange is provided on the top surface of the mounting member. And
In a state where the mounting member is mounted in the mounting hole, the product of the number of threads and the pitch of the outer thread portion provided on the battery inner side than the screw position of the outer thread portion and the inner thread portion is the The battery according to claim 1, wherein the battery is configured to have a thickness larger than the thickness. 3. The battery according to claim 2, wherein an elastic packing is provided between the flange and the mounting hole.