JPH10125294A - Rubber packing for sealing lead-acid battery terminal opening and lead-acid battery terminal opening seal section - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rubber packing capable of preventing a liquid leak even when a columnar terminal is corroded by providing circular grooves along a circular rib on both side of the circular rib in the peripheral direction on the surface of the battery terminal opening sealing rubber packing. SOLUTION: This lead-acid battery opening sealing rubber packing 1 is provided with a tubular rubber packing main body 3 having a through hole 2 to be penetrated by a columnar terminal and a circular rib 9 having a height protruded from the surface of the rubber packing main body 3 continuously in the peripheral direction on its outer periphery. Circular grooves 10 are provided along the circular rib 9 on the surface of the rubber packing main body 3 on both sides of the circular rib 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead-acid battery terminal sealing rubber packing and a lead-acid battery terminal sealing part using the lead-acid battery terminal sealing rubber packing.

[0002]

2. Description of the Related Art FIGS. 4A and 4B show the structure of a conventional rubber packing 1 for sealing a lead-acid battery terminal of this kind.

[0003] This terminal sealing rubber packing 1 is mainly composed of a cylindrical rubber packing body 3 having a through hole 2 through which a columnar terminal called a pole of a lead storage battery penetrates as shown in the figure.
The rubber packing body 3 has a structure in which a tapered surface 4 is provided on the outer periphery of one side of the through hole 2 in the through direction.

FIG. 5 shows a conventional lead-acid battery terminal sealing portion 5 using such a terminal sealing rubber packing 1. As shown in FIG.

[0005] The lead-acid battery terminal sealing portion 5 is provided with a terminal penetrating cylindrical portion 7 across the synthetic resin lid 6 of the battery case of the lead-acid battery.
Are integrally formed and connected to each other, and a columnar terminal 8 called an electrode column provided in an electrode plate group (not shown) penetrates the terminal penetrating cylindrical portion 7 and is led out to the outside. The space between them is sealed by a terminal sealing rubber packing 1 fitted on the outer periphery of the columnar terminal 8. At the lower end of the terminal penetrating cylindrical portion 7, a supporting portion 7a for supporting the terminal sealing rubber packing 1 is provided along the peripheral edge thereof.

[0006]

However, when a lead-acid battery having such a lead-acid battery terminal sealing portion 5 is mounted on, for example, a vehicle such as an automobile, it is subjected to vibration and used at high temperatures. Therefore, the columnar terminals 8 are corroded by the electrolyte solution that moves up and down due to the vibration, and the electrolyte solution leaks from the terminal sealing portion 5, corroding the connector connecting the cells, or causing a leak current to flow, thereby increasing the capacity of the storage battery. There was a problem that it fell or caused an explosion.

An object of the present invention is to provide a rubber packing for sealing a lead-acid battery terminal, which can prevent liquid leakage even if the columnar terminal is corroded.

Another object of the present invention is to provide a rubber packing for sealing a lead-acid battery terminal, which can more reliably prevent leakage even if the columnar terminal is corroded.

Another object of the present invention is to provide a lead-acid battery terminal sealing portion which can prevent liquid leakage even if the columnar terminal is corroded.

Another object of the present invention is to provide a lead-acid battery terminal sealing portion that can more reliably prevent liquid leakage even if the columnar terminal is corroded.

Another object of the present invention is to provide a lead-acid battery terminal sealing portion which can reliably seal at a place where the columnar terminal is susceptible to corrosion.

[0012]

SUMMARY OF THE INVENTION The present invention is to improve a lead-acid battery terminal sealing rubber packing mainly composed of a cylindrical rubber packing body having a through hole through which a columnar terminal of a lead-acid battery penetrates.

In the rubber packing for sealing a lead storage battery terminal according to the present invention, an annular rib having a height protruding from the surface of the rubber packing main body is continuously provided on the outer periphery of the rubber packing main body in the circumferential direction thereof. An annular groove is provided on the surface of the rubber packing body on both sides of the annular rib along the annular rib.

When such a rubber packing is fitted to the outer periphery of the columnar terminal and fitted to the terminal penetrating cylindrical portion of the battery case lid, the annular rib is compressed on the inner surface of the terminal penetrating cylindrical portion, and the annular grooves on both sides are formed. Into a protruding shape. For this reason, the sealing performance of the contact surface between the rubber packing main body and the terminal penetrating cylindrical portion is improved, and the force from the compressed annular rib is brought into contact with the rubber packing main body and the columnar terminal around a position corresponding to the annular rib. By pressing the surface, the sealing performance between the rubber packing main body and the columnar terminal is improved. For this reason, even if the columnar terminal is corroded, as described above, the force from the annular rib in the compressed state presses the contact surface between the rubber packing body and the columnar terminal around the position corresponding to the annular rib, Prevent leaks.

In this case, a plurality of annular ribs are provided on the outer periphery of the rubber packing body at different positions in the direction of penetration of the through holes, and annular grooves are formed on the surface of the rubber packing body on both sides of these annular ribs along the annular rib. By providing each of them, the above-described sealing performance can be improved at a plurality of locations.

Further, according to the present invention, a terminal penetrating tubular portion is continuously provided across the battery case lid of the lead storage battery, and the columnar terminal of the electrode plate group is led out through the terminal penetrating tubular portion to the outside. An object of the present invention is to improve a lead-acid battery terminal sealing portion in which a space between a through-tube portion and a columnar terminal is sealed with a terminal sealing rubber packing fitted on the outer periphery of the columnar terminal.

In the lead-acid battery terminal sealing portion according to the present invention, the terminal sealing rubber packing is mainly composed of a cylindrical rubber packing body having a through hole through which the columnar terminal penetrates. The terminal has a structure in which an annular rib having a height protruding from the surface thereof is continuously provided, and an annular groove is provided along the annular rib on the surface of the rubber packing body on both sides of the annular rib. With the rubber packing for sealing, the rubber packing body fitted on the outer periphery of the columnar terminal is fitted in the terminal penetrating cylindrical part, and the annular rib is compressed on the inner surface of the terminal penetrating cylindrical part and deforms to the annular groove side on both sides And has a protruding shape.

In such a terminal sealing portion, when the rubber packing body of the terminal sealing rubber packing is fitted on the outer periphery of the columnar terminal and is in a fitted state with the terminal penetrating cylindrical portion, the annular rib is formed on the inner surface of the terminal penetrating cylindrical portion. And is deformed to the side of the annular groove on both sides to form a protruding shape. For this reason, the sealing performance of the contact surface between the rubber packing main body and the terminal penetrating cylindrical portion is improved, and the force from the compressed annular rib is brought into contact with the rubber packing main body and the columnar terminal around a position corresponding to the annular rib. By pressing the surface, the sealing performance between the rubber packing main body and the columnar terminal is improved. For this reason, even if the columnar terminal is corroded, as described above, the force from the annular rib in the compressed state presses the contact surface between the rubber packing body and the columnar terminal around the position corresponding to the annular rib, Prevent leaks.

In this case, a plurality of annular ribs are provided on the outer periphery of the rubber packing body at different positions in the direction of penetration of the through holes, and annular grooves are formed along the annular ribs on the surface of the rubber packing body on both sides of these annular ribs. By providing such a seal, the above-described sealing performance can be improved at a plurality of locations.

Further, if at least one annular rib is provided at a position adjacent to the side in contact with the electrolytic solution in the battery case, the annular rib and the annular groove are formed on the side susceptible to corrosion by the electrolytic solution. In the event that the pillar-shaped terminal is corroded, the force from the annular rib in the compressed state as described above is applied to the rubber packing The contact surface of the terminal is pressurized to prevent liquid leakage.

[0021]

1 (A), 1 (B) and 1 (C) show an example of an embodiment of a rubber packing for sealing a lead-acid battery terminal according to the present invention.

Rubber Packing 1 for Sealing Lead-Acid Battery Terminal of the Present Example
Is mainly composed of a cylindrical rubber packing body 3 having a through-hole 2 through which a columnar terminal of a lead storage battery penetrates, and the outer periphery of the rubber packing body 3 continuously protrudes from the surface of the rubber packing body 3 in the circumferential direction. An annular rib 9 having a predetermined height is protruded. In the case of this example, two annular ribs 9 are provided on the outer periphery of the rubber packing main body 3 at different positions in the direction of penetration of the through holes 2. On the surface of the rubber packing body 3 on both sides of the annular rib 9, annular grooves 10 are provided along the annular rib 9, respectively.

When such a rubber packing 1 is fitted to the outer periphery of the columnar terminal and fitted to the terminal penetrating cylindrical portion of the battery case cover, the annular rib 9 is compressed on the inner surface of the terminal penetrating cylindrical portion and the annular ribs 9 on both sides are formed. It is deformed to the groove side and becomes a protruding shape. For this reason, the sealing performance of the contact surface between the rubber packing main body 3 and the terminal penetrating cylindrical portion is improved, and the force from the compressed annular rib 9 is applied to the rubber packing main body 3 around the position corresponding to the annular rib 9. Pressing the contact surface of the columnar terminal, the rubber packing body 3
The sealing performance between the terminal and the columnar terminal is also improved. Therefore, even if the columnar terminal is corroded, the force from the compressed annular rib 9 presses the contact surface between the rubber packing body 3 and the columnar terminal around the position corresponding to the annular rib 9, and the leakage occurs. Prevent liquid.

In this case, a plurality of annular ribs 9 are provided on the outer periphery of the rubber packing body 3 at different positions in the penetrating direction of the through hole 2, and annular grooves 10 are formed on the surface of the rubber packing body 3 on both sides of these annular ribs 9. When provided along each of the annular ribs 9, the aforementioned sealing performance can be improved at a plurality of locations.

FIG. 2 shows an example of an embodiment of a lead-acid battery terminal sealing portion 5 using such a rubber packing 1 for sealing a lead-acid battery terminal.

In the lead-acid battery terminal sealing portion 5 of the present embodiment, the terminal sealing rubber packing 1 is in a state where the rubber packing main body 3 fitted on the outer periphery of the columnar terminal 8 is fitted into the terminal penetrating cylindrical portion 7. Each of the annular ribs 9 is compressed on the inner surface of the terminal penetrating cylindrical portion 7 and is deformed toward the annular groove 10 on both sides so as to project.

In such a terminal sealing portion 5, when the rubber packing body 3 of the terminal sealing rubber packing 1 is fitted on the outer periphery of the columnar terminal 8 as shown in the figure and is fitted to the terminal penetrating cylindrical portion 7, Each of the annular ribs 9 is compressed on the inner surface of the terminal penetrating cylindrical portion 7 and is deformed toward the annular groove 10 on both sides to have a projected shape. For this reason, the rubber packing body 3 and the terminal penetrating cylinder 7
The sealing performance of the contact surface with the rubber rib 9 is improved, and the force from each of the annular ribs 9 in a compressed state presses the contact surface between the rubber packing body 3 and the columnar terminal 8 around a position corresponding to the annular rib 9, The sealing performance between the rubber packing body 3 and the columnar terminal 7 is also improved. Therefore, even if the columnar terminal 8 is corroded, the force from the annular rib 9 in the compressed state as described above causes the contact between the rubber packing body 3 and the columnar terminal 8 around the position corresponding to the annular rib 9. Pressurize the surface to prevent liquid leakage.

For this reason, when a sealed lead-acid battery having a lead-acid battery terminal sealing portion 5 as shown in FIG. 2 is mounted on a vehicle, even if the electrolyte moves up and down and left and right due to the vibration of the vehicle, the terminal sealing of this embodiment is performed. According to the part 5, leakage of the electrolytic solution can be prevented.

In this case, as in this embodiment, a plurality of annular ribs 9 are provided on the outer periphery of the rubber packing body 3 at different positions in the penetrating direction of the through holes 2, and the surface of the rubber packing body 3 on both sides of these annular ribs 9 is provided. When the annular grooves 10 are provided along the annular ribs 9 respectively, the sealing performance described above can be improved at a plurality of locations, and the sealing performance of the terminal sealing portion 5 can be further improved.

If at least one of the annular ribs 9 is provided at a position adjacent to the side in contact with the electrolytic solution in the battery case as shown in FIG. As described above, even if the pillar-shaped terminal 8 is corroded, the force from the annular rib 9 in the compressed state moves the position corresponding to the annular rib 9 even if the pillar-shaped terminal 8 is corroded. The contact surface between the rubber packing body 3 and the columnar terminal 8 is pressurized as the center, so that liquid leakage can be prevented.

The performance of the lead-acid battery having the lead-acid battery terminal sealing portion 5 as shown in FIG. 2 (the present invention) and the lead-acid battery having the lead-acid battery terminal sealing portion 5 as shown in FIG. For comparison, dilute sulfuric acid with a specific gravity of 1.280 (20 ° C) was put into the battery case of these lead-acid batteries together with the electrode group, and the ambient temperature was 30 ° C and
The penetration width of dilute sulfuric acid into the terminal sealing portion was compared under the condition of a current of 1 A. FIG. 5 shows the result of this comparison. In this figure, the product No. 1 of the present invention is a three-lead storage battery having a lead-acid battery terminal sealing portion 5 according to the present invention having the structure shown in FIG. It is three lead-acid batteries having a conventional lead-acid battery terminal sealing portion 5 having the structure shown in FIG. Also, Invention No. 1
No. 3 and conventional products No. 1 to NO.
When the immersion time into the terminal sealing portion 5 is 10 hours, b is when the immersion time into the terminal sealing portion 5 is 50 hours, c is when the immersion time into the terminal sealing portion 5 is 100 hours, and d is when the immersion time into the terminal sealing portion 5 is Immersion time 15
This is the permeation width at 0 hours.

As is clear from this figure, the immersion time is 15
At 0 hours, the penetration width is 15 mm to 16 mm for conventional products No. 1 to No. 3.
In contrast, 6 mm to 8 mm for the products No. 1 to No. 3 of the present invention.
mm, and the penetration widths of the products of the present invention No. 1 to NO. 3 are significantly narrower.

[0033]

In the rubber packing for sealing a lead-acid battery terminal according to the present invention, an annular rib having a height protruding from the surface of the rubber packing body is continuously provided on the outer periphery of the rubber packing body in the circumferential direction thereof. Since the annular groove is provided on the surface of the rubber packing body on both sides of the annular rib along the annular rib, such a rubber packing is fitted on the outer periphery of the columnar terminal, and fitted on the terminal penetrating cylindrical portion of the battery case lid. When they are combined, the annular rib is compressed on the inner surface of the terminal penetrating cylindrical portion and deforms and protrudes toward the annular grooves on both sides, so that the contact surface between the rubber packing body and the terminal penetrating cylindrical portion is formed. The sealing performance is improved, and the force from the annular rib in the compressed state presses the contact surface between the rubber packing body and the columnar terminal around the position corresponding to the annular rib, and the seal between the rubber packing body and the columnar terminal. Performance It made. For this reason, even if the columnar terminal is corroded, as described above, the force from the annular rib in the compressed state presses the contact surface between the rubber packing body and the columnar terminal around the position corresponding to the annular rib, Liquid leakage can be prevented.

[Brief description of the drawings]

FIG. 1 shows an example of an embodiment of a rubber packing for sealing a lead-acid battery terminal according to the present invention, wherein (A) is a plan view, (B) is a partially longitudinal side view, and (C) is (B). FIG.

FIG. 2 is a longitudinal sectional view showing an example of an embodiment of a lead-acid battery terminal sealing portion according to the present invention.

FIG. 3 is a comparison diagram of the penetration width of dilute sulfuric acid between the lead-acid battery terminal sealing portion according to the present invention and the conventional lead-acid battery terminal sealing portion.

4A and 4B show a structure of a conventional rubber packing for sealing a lead storage battery terminal, wherein FIG. 4A is a plan view and FIG.

FIG. 5 is a longitudinal sectional view of a conventional lead-acid battery terminal sealing portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rubber packing for sealing a lead storage battery terminal 2 Through hole 3 Rubber packing main body 4 Tapered surface 5 Lead storage battery terminal sealing part 6 Synthetic resin lid 7 Terminal penetration cylinder part 7a Supporting part 8 Column terminal 9 Ring rib 10 Ring groove

Claims (5)

[Claims] 1. A rubber packing for sealing a lead-acid battery terminal mainly comprising a cylindrical rubber packing body having a through hole through which a columnar terminal of a lead-acid battery penetrates, wherein the rubber packing is continuous with the outer periphery of the rubber packing body in the circumferential direction. An annular rib having a height protruding from the surface of the rubber packing main body is protruded, and an annular groove is provided on the surface of the rubber packing main body on both sides of the annular rib along the annular rib. Rubber packing for sealing lead-acid battery terminals. 2. A plurality of annular ribs are provided on the outer periphery of the rubber packing main body at different positions in the through direction of the through holes, and the surface of the rubber packing main body on both sides of these annular ribs is provided with the annular rib. The rubber packing for sealing a lead-acid battery terminal according to claim 1, wherein annular grooves are provided along each of the grooves. 3. A terminal penetrating cylindrical portion is continuously provided across the lid of the battery case of the lead storage battery, and a columnar terminal of the electrode plate group passes through the terminal penetrating cylindrical portion and is led out to the outside. In a lead-acid battery terminal sealing portion in which a gap between a cylindrical portion and the columnar terminal is sealed with a terminal sealing rubber packing fitted on an outer periphery of the columnar terminal, the terminal sealing rubber packing penetrates through the columnar terminal. An annular rib having a height protruding from a surface of the rubber packing body continuously in a circumferential direction of the cylindrical rubber packing body having a hole as a main body; An annular groove is provided along the annular rib on the surface of the rubber packing body on both sides of the rubber packing body, and the rubber gasket for terminal sealing is fitted on the outer periphery of the columnar terminal. In a state where the annular rib is fitted in the terminal penetrating cylindrical portion, the annular rib is compressed on an inner surface of the terminal penetrating cylindrical portion and deformed toward the annular grooves on both sides to have a protruding shape. Lead-acid battery terminal sealing part. 4. A plurality of said annular ribs are provided on the outer periphery of said rubber packing main body at different positions in the direction of penetration of said through-holes. 4. The lead-acid battery terminal sealing part according to claim 3, wherein an annular groove is provided along each. 5. The lead-acid battery terminal closure according to claim 4, wherein at least one of the annular ribs is provided at a position adjacent to a side in contact with the electrolytic solution in the battery case. Department.