JPH0536755U - Sealed lead acid battery - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a sealed lead acid battery capable of avoiding the problems associated with an O-ring fitted to a pole. [Structure] The battery terminal 6 is provided with a tapered cylindrical portion 6b having a large diameter in the upper portion and a small diameter in the lower portion. The inner diameter of the small diameter hole portion of the tapered cylindrical portion 6b is formed to be substantially equal to the outer diameter of the fitting portion of the pole post 4. The battery terminal 6 is an acid resistant structure in which the surface of a brass molded product is plated with lead. The hole 3 on the bottom surface 2a of the recess 2 of the lid 1 of the battery case is formed as a tapered hole into which the tapered cylindrical portion 6b of the battery terminal 6 is fitted. The tapered cylindrical portion 6b is fitted in the tapered hole 3. The tapered portion at the tip of the pole 4 is inserted into the tapered cylindrical portion 6b. Tapered cylindrical part 6
In b, the battery terminals 6 and the poles 4 are connected by soldering 7. In the concave portion 2, the sealing agent 8 is covered so as to cover the soldered portion.
Fill and seal.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sealed lead acid battery, and more particularly to improvement of a terminal sealing portion thereof.

[0002]

[Prior Art]

 As shown in FIGS. 3 and 4A and 4B, the terminal sealing portion of the conventional sealed lead-acid battery is provided with a recess 2 on a part of the surface of the lid 1 of the battery case, and the bottom surface of the recess 2 is provided. A lead pole 4 made of lead is led out from the hole 3 of 2a, and an O-ring 5 is fitted to the outer periphery of the pole 4 inside the recess 2 and the O-ring 5 is brought into contact with the bottom surface 2a to A battery terminal 6 is fitted to the outer periphery of the pole 4 of the battery utilizing the hole 6a, the battery terminal 6 is connected to the pole 4 by soldering 7, and a soldering portion is provided in the recess 2. The sealing material 8 was filled up to the covered position to form a closed structure. The battery terminal 6 has a structure in which a tin-plated surface of a brass molded product is applied.

In such a terminal sealing portion, the O-ring 5 serves to prevent the sealing material 8 from flowing into the battery case when the sealing material 8 is poured into the recess 2. Further, the sealing agent 8 is for preventing dilute sulfuric acid, which is the electrolytic solution in the battery case, from coming out of the lid 1 along the poles 4 and corroding the battery terminals 6. In order to seal the dilute sulfuric acid, a sealing agent 8 that has good adhesion to the pole 4 is selected, and the pole 8 below the solder 7 soldering portion of the battery terminal 6 and the pole 4 is the sealing agent 8. It is important to set the length of the covered portion so that the dilute sulfuric acid crawls along the pole 4 to a longer distance.

[0004]

[Problems to be solved by the device]

 In such a conventional terminal sealing portion, if the O-ring 5 is not fitted to the bottom surface 2a of the recess 2 as shown in FIG. 3, the O-ring 5 will float from the bottom surface 2a as shown in FIG. When the sealing agent 8 is poured into the recess 2 and cured in this state, the solder 7 attachment portion between the battery terminal 6 and the pole 4 and the O-ring 5 are more than those when the O-ring 5 is normally inserted. Since the distance is shortened, the portion of the pole 4 covered with the sealing agent 8 is also shortened. This causes a problem that dilute sulfuric acid crawls up along the poles 4 and reaches the battery terminals 6 and easily corrodes the battery terminals 6. That is, in the conventional structure, there is a problem that the reliability of the terminal sealing portion depends on the fitting condition of the O-ring 5. Further, when the O-ring 5 is used, the number of parts is increased by 1 and the number of steps for fitting the O-ring 5 is increased by 1, so that the cost is increased.

An object of the present invention is to provide a sealed lead-acid battery that can avoid the problems associated with an O-ring fitted to a pole.

[0006]

[Means for Solving the Problems]

 The structure of the present invention which achieves the above object will be described below.

According to the first aspect of the present invention, a recess is provided in a part of the surface of the lid of the battery case, the pole is led out from the hole in the bottom of the recess, and the battery terminal is soldered in the recess. In a sealed lead-acid battery that is attached and connected, and the recess is filled with a sealing agent and sealed, the battery terminal is provided with a tapered cylindrical portion having a large diameter in the upper portion and a small diameter in the lower portion, The inner diameter of the small diameter hole portion of the tapered cylindrical portion is formed to be substantially equal to the outer diameter of the fitting portion of the pole column, and the hole on the bottom surface of the recess is formed as a tapered hole into which the tapered cylindrical portion is fitted. The battery terminal is formed as an acid resistant structure, the tip of the pole is formed in a tapered shape, and the battery terminal and the pole are soldered and connected in the tapered cylindrical portion. And

According to a second aspect of the present invention, in the first aspect, the battery terminal has a lead-plated structure.

[0009]

[Action]

 With this structure, the O-ring is omitted, the number of parts is reduced by one, and the O-ring fitting process is eliminated. Also, the problems associated with the mounting position of the O-ring are eliminated.

The battery terminal comes into direct contact with the electrolytic solution, but since it is formed as an acid resistant structure, it is possible to prevent corrosion.

Further, the battery terminal is provided with a tapered cylindrical portion having a large diameter in the upper portion and a small diameter in the lower portion, and the inner diameter of the small diameter hole portion of the tapered cylindrical portion is approximately equal to the outer diameter of the fitting portion of the pole pillar. The O-ring is formed in the same shape, the tapered cylindrical portion is fitted into the tapered hole in the bottom surface of the concave portion of the lid, and the pole column is soldered to the tapered cylindrical portion inside the tapered cylindrical portion. It is possible to prevent the electrolyte from leaking even without it.

Further, even if the inner diameter of the small-diameter hole portion of the tapered cylindrical portion is formed to be substantially equal to the outer diameter of the fitting portion of the pole column in order to prevent liquid leakage, the tip of the pole column is formed in a tapered shape. Therefore, the pole column can be easily inserted into the small diameter hole portion of the tapered cylindrical portion.

When the battery terminal is lead-plated, the battery terminal has an acid-resistant structure, and at the same time, soldering is easy.

[0014]

【Example】

 1 and 2A and 2B show an embodiment of a sealed lead acid battery according to the present invention. The parts corresponding to those in FIGS. 3 to 5 described above are designated by the same reference numerals.

In the sealed lead-acid battery of this embodiment, the battery terminal 6 is provided with a tapered cylindrical portion 6b having a large diameter in the upper portion and a small diameter in the lower portion. The inner diameter of the small diameter hole portion 6b1 of the tapered cylindrical portion 6b is formed to be substantially equal to the outer diameter of the fitting portion of the pole post 4. The battery terminal 6 is formed as an acid resistant structure by subjecting the surface of a brass molded product to lead plating in particular.

The hole 3 in the bottom surface 2 a of the recess 2 of the lid 1 of the battery case is formed as a tapered hole into which the tapered cylindrical portion 6 b of the battery terminal 6 is fitted. A tapered tube portion 6b is fitted in the tapered hole 3, and the other portion of the battery terminal 6 projects outside the recess 2.

The tip of the lead pole 4 made of lead is formed in a tapered shape so as to be easily inserted into the tapered cylindrical portion 6b. The tapered portion of the tip of the pole 4 is inserted into the tapered cylindrical portion 6b.

The battery terminals 6 and the poles 4 are connected by soldering 7 inside the tapered cylindrical portion 6b.

A sealing agent 8 is filled and sealed in the recess 2 so as to cover the soldered portion.

Next, a procedure for assembling the terminal sealing portion of such a sealed lead-acid battery will be described.

First, the tapered portion at the tip of the pole 4 is inserted into the tapered hole 3. In this case, even if the inner diameter of the lower portion of the tapered hole 3 is small, the tip of the pole 4 is tapered, so that the tip of the pole 4 can be easily inserted into the tapered hole 3. it can.

Next, the tapered cylindrical portion 6 b of the battery terminal 6 is pushed into and fitted into the tip of the pole 4 protruding into the tapered hole 3. Also in this case, even if the inner diameter of the lower portion of the tapered cylindrical portion 6b is small, the tip of the pole pillar 4 is tapered, so that the tip end of the pole pillar 4 is easily tapered. 6b can be inserted. The tapered cylindrical portion 6b fitted to the outer periphery of the pole 4 is formed such that the inner diameter of the small diameter hole portion 6b1 of the tapered cylindrical portion 6b is substantially equal to the outer diameter of the fitting portion of the polar pillar 4. The small-diameter hole portion 6b1 of the tapered cylindrical portion 6b is almost in contact with the outer circumference of the pole 4.

In this state, the poles 4 and the tapered cylindrical portion 6b are soldered and connected. At this time, since the small diameter hole portion 6b1 of the tapered cylindrical portion 6b is almost in contact with the outer circumference of the pole 4, the pad 7 does not droop downward.

Next, the concave portion 2 is filled with a sealing agent 8 so as to cover the soldered portion 7 and is sealed.

[0025]

[Effect of the device]

 As described above, in the sealed lead-acid battery according to the present invention, the battery terminal is provided with the tapered cylindrical portion having the large diameter in the upper portion and the small diameter in the lower portion, and the tapered cylindrical portion is provided at the bottom of the concave portion of the battery case lid. Since it is fitted to the tapered cylindrical part provided on the surface, the O-ring can be omitted, the number of parts can be reduced, and the O-ring fitting process can be eliminated to reduce the cost. Problems associated with the ring attachment position can also be eliminated.

In the present invention, the battery terminal comes into direct contact with the electrolytic solution, but since it is formed as an acid resistant structure, corrosion can be prevented.

Further, the battery terminal is provided with a tapered cylindrical portion having a large diameter in the upper portion and a small diameter in the lower portion, and the inner diameter of the small diameter hole portion of the tapered cylindrical portion is approximately equal to the outer diameter of the fitting portion of the pole pillar. The O-ring is formed in the same shape, the tapered cylindrical portion is fitted into the tapered hole in the bottom surface of the concave portion of the lid, and the pole column is soldered to the tapered cylindrical portion inside the tapered cylindrical portion. It is possible to prevent the electrolyte from leaking even without it.

Further, even if the inner diameter of the small-diameter hole portion of the tapered cylindrical portion is formed to be substantially equal to the outer diameter of the fitting portion of the pole column to prevent liquid leakage, the tip of the pole column is formed in a tapered shape. Therefore, the pole column can be easily inserted into the small diameter hole portion of the tapered cylindrical portion.

In particular, when the battery terminals have a lead-plated structure, there are advantages that the battery terminals have an acid resistant structure and soldering is easy.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a main part of an embodiment of a sealed lead-acid battery according to the present invention.

2A and 2B are a vertical sectional view and a plan view of a battery terminal used in this example.

FIG. 3 is a longitudinal sectional view of a main part of a conventional sealed lead-acid battery.

4A and 4B are a vertical cross-sectional view and a plan view of a battery terminal used in a conventional sealed lead-acid battery.

FIG. 5 is a vertical cross-sectional view showing an example of bad attachment of battery terminals in a terminal sealing portion of a conventional sealed lead-acid battery.

[Explanation of symbols]

1 ... Lid of battery case, 2 ... Recess, 2a ... Bottom of recess 2, 3 ...
Hole, 4 ... Pole, 5 ... O-ring, 6 ... Battery terminal, 6a ...
Hole, 6b ... tapered cylindrical portion, 6b1 ... small diameter hole portion, 7 ... solder,
8 ... Sealing agent.

Claims (2)

[Scope of utility model registration request] 1. A recess is provided in a part of a surface of a lid of a battery case, a pole is led out from a hole in a bottom surface of the recess, a battery terminal is soldered and connected in the recess, and a recess is provided in the recess. In a sealed lead-acid battery that is filled with a sealing agent and sealed, the battery terminal is provided with a taper-shaped cylindrical portion having a large diameter in the upper portion and a small diameter in the lower portion, and a small diameter hole portion of the tapered cylindrical portion. The inner diameter is formed to be approximately equal to the outer diameter of the fitting portion of the pole,
The hole on the bottom surface of the recess is formed as a tapered hole into which the tapered cylindrical portion is fitted, the battery terminal is formed as an acid resistant structure, and the tip of the pole is formed in a tapered shape,
A sealed lead-acid battery, wherein the battery terminal and the pole are soldered and connected in the tapered cylindrical portion. 2. The sealed lead-acid battery according to claim 1, wherein the battery terminal has a lead-plated structure.