JPH0644021U - Lead acid battery - Google Patents

Abstract

(57) [Abstract] [Purpose] Prevents the corrosion of the surface of the pole 4 that contacts the battery case lid 3 to prevent the pole 4 from breaking or breaking. [Structure] A gap 7 between a battery case lid 3 and a pole 4 is filled with a water-repellent grease 5 having acid resistance. [Effect] The grease 5 prevents the electrolytic solution 6 from penetrating into the gap 7, and corrosion is not generated on the surface of the pole 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lead storage battery, and more particularly to a pole column sealing portion of the lead storage battery.

[0002]

[Prior art]

 FIG. 2 is a cross-sectional view of a pole post sealing portion of a conventional lead-acid battery, where 1 is a ring screw, 2 is an O-ring, 3 is a battery case lid, 4 is a pole post, 6 is an electrolytic solution, and 7 is a battery case lid 3. Shows the gap between the pole and the pole 4. As shown in FIG. 2, the pole post sealing portion of the conventional lead-acid battery inserts the pole post 4 into the battery case lid 3 and protrudes to the outside of the battery case, and the pole screw 4 is attached to the battery case by the ring screw 1 via the O-ring 2. The structure was attached to the lid 3.

[0003]

[Problems to be solved by the device]

 In the structure of the pole column sealing part described in the conventional technique, the acid mist generated during the charging of the lead storage battery penetrates into the gap 7 between the battery case lid 3 and the pole column 4 under the O-ring 2 and enters the portion. The electrolytic solution was accumulated and the pole 4 was locally corroded. As the corrosion of the poles 4 progresses, the poles 4 break or the corrosion products protrude outward from the poles 4, causing cracks in the battery case lid 3.

The present invention has been made in view of the above problems, and an object of the present invention is to prevent the electrolytic solution from entering the gap 7 between the battery case lid 3 and the pole 4 and to make the gap 7 It is to prevent the pole pillar corrosion in the.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the lead-acid battery of the present invention is characterized in that a gap 7 between the battery case lid 3 and the pole 4 is filled with acid-repellent water-repellent grease 5.

[0006]

[Work]

 The grease 5 closes the gap 7 between the battery case lid 3 and the pole 4 to prevent the acid mist generated during charging and the scattered electrolyte from entering the gap 7.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing a pole column sealing portion of a lead storage battery according to the present invention. Reference numeral 5 is a water-repellent grease, and other reference numerals are the same as those in FIG. In this embodiment, the grease 5 is a fluorine type and the poles 4 are made of lead-5% antimony alloy.

Next, a product of the present invention, a conventional product, and a comparative product in which an acid resistant paint was applied to the surface of the pole 4 of the sealing portion were prepared, and these batteries were subjected to an overcharge test at 70 ° C. for 3 months. After that, they were dismantled and the corrosion conditions of the poles were investigated. The results are shown in Table 1.

Table 1

From Table 1, it can be seen that the conventional product and the comparative product have a PbO ₂ corrosion layer formed on the surface of the pole 4 and the electrolytic solution 6 has penetrated into the gap 7 between the pole 4 and the battery case lid 3. However, in the product of the present invention, no abnormality was found on the surface of the pole, and it was found that the grease 5 prevented the infiltration of the electrolyte solution 6.

[0011]

[Effect of device]

 Since the present invention is configured as described above, it is possible to prevent local corrosion of the pole 4 and prevent breakage of the pole 4 and breakage of the battery case lid 3.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing an embodiment of a pole post sealing portion according to the present invention.

FIG. 2 is a schematic cross-sectional view showing an example of a pole post sealing portion of a conventional lead storage battery.

[Explanation of symbols]

 3 Battery case cover 4 Polar column 5 Grease 7 Gap

Claims (1)

[Scope of utility model registration request] 1. A lead-acid battery characterized in that a gap between the battery case lid and the pole is filled with water-repellent grease having acid resistance.