JPH065112U - Battery terminal - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a terminal portion of a storage battery having excellent reliability against liquid tightness. A terminal portion of a storage battery having a lid 1, a pole 2, a terminal 3, a screw 4, and an O-ring 5, the lid 1 having a sleeve 1b on a lower surface and a center of the sleeve 1b. And a through hole 1c penetrating from the lower surface to the upper surface is formed, and the pole pillar 2 has a step surface 2c formed on the side surface so that the width of the upper portion 2a is smaller than the width of the lower portion 2b. The upper portion 2a is inserted into the through hole 1c of the lid 1, and the side surface of the lower portion 2b is in contact with the inner side of the sleeve 1b of the lid 1, and the terminal 3 is connected to the pole post by the screw 4. The O-ring 5 is mounted on the step surface 2c of the pole 2 and is screwed to the upper surface of
The upper surface is in contact with the lower surface of the lid 1, and the outer surface is in contact with the inner side of the sleeve 1b.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvement of a terminal portion of a storage battery.

[0002]

[Prior art]

 As shown in FIG. 2, the terminal portion of a conventional small sealed lead-acid battery has a pole 2 inserted into a through hole 1c formed in a lid 1, and an O-ring is inserted between the through hole 1c and the pole 2. 5 was inserted and the solder-plated brass terminal 3 was joined to the upper surface of the pole 2 with solder 8, and then the adhesive 6 was injected from above to form a hermetically sealed structure. In order to automatically manufacture the terminal portion having such a structure, a flux is used in order to improve the reliability of soldering. However, when the flux adheres to the terminal 3 or the pole 2, the effect of the adhesive 6 is obtained. As a result, problems such as electrolyte leaking from the terminal part occurred.

[0003] In order to solve such a problem, if the product is manually manufactured without using a flux, the productivity is lowered and the battery cost is increased.

In order to solve this problem, in Japanese Patent Laid-Open No. 2-54864, a connecting terminal is brought into contact with the end face of the pole, and a screw having an acute tip is passed through a hole of the terminal and the pole is axially moved. A method of fastening the pole and the terminal by screwing in is disclosed. Then, in order to prevent airtightness of the fastening portion and corrosion of the terminals, an upward step surface 2c is formed on the pole 2 as shown in FIG. 3, and the O-ring 5 is placed on the step surface 2c. A structure in which the end face 1d of the through hole 1c of the lid 1 is pressed and the adhesive 6 is injected into the through hole 1c is also shown.

[0005]

[Problems to be solved by the device]

 In the structure shown in FIG. 3 described in the conventional technique, the O-ring 5 is pressed vertically to maintain liquid tightness, but since the side surface of the O-ring 5 is open, the electrolytic solution adheres to the surface. However, the problem that the electrolytic solution infiltrates into the pressure contact surface and leaks to the outside has not been solved before.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a terminal portion of a storage battery having excellent reliability against liquid tightness.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is a terminal portion of a storage battery having a lid 1, a pole 2, a terminal 3, a screw 4, and an O-ring 5, the lid 1 having a sleeve on a lower surface thereof. 1b and a through hole 1c which is located at the center of the sleeve 1b and penetrates from the lower surface to the upper surface. The pole 2 has a width of the upper portion 2a smaller than that of the lower portion 2b. As described above, the step surface 2c is formed on the side surface, the upper portion 2a is inserted into the through hole 1c of the lid 1, and the lower portion 2b side surface is in contact with the inside of the sleeve 1b of the lid 1. Is screwed to the upper surface of the pole 2 by the screw 4, the O-ring 5 is placed on the step surface 2c of the pole 2, and the upper surface is the lower surface of the lid 1. , The outer surface is in contact with the inner side of the sleeve 1b,

[0008]

[Work]

 Since the upper surface and the outer surface of the O-ring 5 are in contact with the lid 1 and the lower surface is in contact with the pole 2, the liquid-tightness is maintained, and the sleeve 1b prevents the electrolytic solution from directly adhering to the O-ring 5. .

[0009]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing a terminal portion of the present invention, in which 1 is a lid, 2 is a pole, 3 is a terminal, 4 is a screw, 5 is an O-ring, 6 is an adhesive, and 7 is an electrode plate.

As shown in the drawing, a concave portion 1a is formed on the upper surface of the lid 1, and a circular sleeve 1b extending downward is formed on the lower surface of the lid 1 facing the bottom surface of the concave portion 1a. A circular hole 1c penetrating from the lower surface of the lid 1 to the bottom surface of the concave portion 1a is formed at the center of 1b. Further, the columnar pole 2 having a cylindrical shape co-molded with the ears of the electrode plate 7 has a step surface 2c formed on the side surface so that the width (diameter) of the upper portion 2b is smaller than the width (diameter) of the lower portion. There is. The O-ring 5 is placed on the step surface 2c, and the upper portion 2a of the pole 2 is inserted into the through hole 1c of the lid 1. The upper surface of the pole 2 is on the same horizontal plane as the bottom surface of the recess 1a, and is screwed to the terminal 3 and the screw 4. Then, the concave portion 1a is filled with the adhesive 6 and the joint portion between the screw 4 and the terminal 3 is buried. Moreover, the upper side surface of the lower portion 2b of the pole 2 is in contact with the inner side of the sleeve 1b.

Next, the manufacturing method will be described. First, the O-ring 5 having an outer diameter substantially equal to the diameter of the lower portion 2b of the pole 2 is placed on the step 2c of the pole 2, and the upper portion 2a of the pole 2 is inserted into the through hole 1c of the lid 1. Insert. Then, the lid 1 and a battery case (not shown) are joined by heat welding or an adhesive, the metal terminal 3 is brought into contact with the upper surface of the pole 2, and the tapping screw 4 is passed through the screw hole 3a of the terminal 3. Then, it is screwed into the upper surface of the pole 2. At this time, the terminal 3 comes into contact with the bottom surface of the recessed portion 1a of the lid 1, the step surface 2c of the pole 2 is pushed upward, and the O-ring 5 is pressed against the lower surface of the lid 1 and the step surface 2c. Due to this pressure contact, the O-ring 5 spreads laterally and contacts the inside of the sleeve 1b and the side surface of the upper portion 2a of the pole 2.

As described above, by screwing the tapping screw 4, the O-ring 5 is pressed against the upper, lower, left, and right directions to maintain airtightness. Further, by screwing the tapping screw 4, the outer side of the lower portion 2b of the pole 2 is expanded and pressed against the inner side of the sleeve 1b to enhance the liquid tightness.

Next, when the adhesive 6 made of a thermosetting resin is injected into the concave portion 1 a and cured, a liquid-tight seal, the terminal 3 and the pole 2 can be surely connected. Further, since the tapping screw 4 is buried by the adhesive 6, corrosion is prevented.

[0014]

[Effect of device]

 INDUSTRIAL APPLICABILITY Since the present invention is configured as described above, it has the effects of improving liquid tightness and reducing defects such as liquid leakage.

[Brief description of drawings]

FIG. 1 is a sectional view showing a terminal portion of the present invention.

FIG. 2 is a cross-sectional view showing a conventional terminal portion joined by soldering.

FIG. 3 is a cross-sectional view showing a conventional terminal portion joined by screws.

[Explanation of symbols]

 1 Lid 1b Sleeve 1c Through hole 2 Pole pole 2a Top of pole column 2b Bottom of pole column 2c Step 3 Terminal 4 Screw 5 O-ring

Claims (1)

[Scope of utility model registration request] 1. A lid (1), a pole (2) and a terminal (3).
And a screw (4) and an O-ring (5), which is a terminal part of a storage battery, wherein the lid (1) is located on the lower surface of the sleeve (1b) and at the center of the sleeve (1b), A through hole (1c) penetrating from the lower surface to the upper surface is formed, and the pole pillar (2) has a step on the side surface so that the width of the upper portion (2a) is smaller than the width of the lower portion (2b). A surface (2c) is formed, the upper portion (2a) is inserted into the through hole (1c) of the lid (1), and the side surface of the lower portion (2b) abuts on the inside of the sleeve (1b) of the lid (1). The terminal (3) is screwed to the upper surface of the pole (2) by the screw (4), and the O-ring (5) is the pole (2). ) Step surface (2
A terminal part of a storage battery, characterized in that the terminal is placed on c), and the upper surface is in contact with the lower surface of the lid (1) and the outer surface is in contact with the inner side of the sleeve (1b).