JPH0592964U - Cathode absorption sealed battery - Google Patents

Abstract

(57) [Summary] [Object] To provide a cathode absorption type sealed battery having an L-shaped terminal, which is easy to manufacture and highly reliable. [Constitution] A cathode absorption having a terminal structure in which a hollow portion is provided around the terminal penetrating portion of the battery case lid, a pole and an L-shaped terminal are welded at this hollow portion, and the hollow portion is filled with a synthetic resin filler. In the sealed battery, the small protrusions for positioning the L-shaped terminal are provided on both lower side portions of the L-shaped terminal or both side walls of the lid recess portion facing the lower both side portions of the L-shaped terminal.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cathode absorption type sealed battery in which an L-shaped terminal is provided as a terminal and the periphery of the L-shaped terminal portion is kept liquid-tight and airtight with a synthetic resin filler.

[0002]

[Prior art and its problems]

 In recent years, cathode absorption type sealed batteries have rapidly become popular as stationary storage batteries in the field of industrial batteries such as those for communication and emergency power sources.

This type of battery is used by connecting and fixing a plurality of unit cells via a connecting plate. In this case, it is necessary to use L-shaped terminals for the terminals of each battery, tighten the connection plate with the bolt nuts against the contact surface of each L-shaped terminal, and use them in a highly reliable state for a long time.

However, if there is a problem such that the contact surfaces of the L-shaped terminals of each unit cell are not aligned in one direction, excessive stress is applied to the L-shaped terminal portions, and the filler around the terminals may be damaged depending on the situation. However, there was a problem such as impairing the sealing function.

FIG. 2 shows a structure of a storage battery having an L-shaped terminal structure at a terminal portion, (A) is a top view thereof, and (B) is a longitudinal sectional view of an essential part. In the figure, 1 is a battery case, 2 is a battery container lid, and the terminal penetration portion has a terminal penetration recess 5 for filling the peripheral portion of the L-shaped terminal 3 with the synthetic resin sealant 4. is doing. Reference numeral 6 denotes a battery element, which is welded and connected to the L-shaped terminal 3 via the pole 7. Reference numeral 8 is an exhaust portion having a safety valve that opens when the pressure inside the battery exceeds a certain pressure.

FIG. 3 is a view showing a situation in which a plurality of cathode absorption type sealed batteries provided with L-shaped terminals 3 are used in a battery pack, in which L-shaped terminals 3 of each unit cell are connected via a connecting plate 9. Connected and fixed with bolts and nuts 10.

FIG. 4 shows a structure of an L-shaped terminal portion of a conventional battery, (A) is a top view thereof, and (B) is a longitudinal sectional view thereof. The L-shaped terminal 3 is welded to the pole 7 at the terminal penetrating recess 5 of the lid 2. A gap is provided between the L-shaped terminal 3 and the hollow portion 5, and the gap is filled with the synthetic resin filler 4 for liquid-tightness.

Due to this gap, when the L-shaped terminal 3 is welded to the pole 5 during the manufacture of the battery, the L-shaped terminal 3 may be attached eccentrically as shown in FIG. 4C. When connecting, the connecting surfaces of the L-shaped terminals 3 of each unit cell are not aligned, and when connecting and fixing the connecting plate 9, excessive stress is applied to the connecting plate and the L-shaped terminal 3. Depending on the situation, the filler around the terminals may be added. There was a risk of damage and loss of the sealing function.

[0009]

[Means for Solving the Problems]

 The present invention has a terminal structure in which a hollow portion is provided around the terminal penetrating portion of the battery case lid, the pole and the L-shaped terminal are welded at this hollow portion, and the hollow portion is filled with a synthetic resin filler. The cathode absorption type sealed battery is characterized in that small protrusions for positioning the L-shaped terminal are provided on both side walls of the lid recessed portion facing the lower both sides of the L-shaped terminal or both lower sides of the L-shaped terminal. When welding the L-shaped terminal, the contact surface of the L-shaped terminal is automatically set at a fixed position in a fixed direction.

[0010]

【Example】

 FIG. 1 is a view showing the structure of the L-shaped terminal portion of the battery of the present invention, in which the L-shaped terminal 3 is connected to both sides below the rising portion so that its tip contacts the side wall of the recess 5 of the lid 2. A small protrusion 11 is provided. 4 is a filler and 7 is a pole. The same effect can be obtained even if the small protrusions are provided on the side wall portion side of the hollow portion of the lid. With such a structure, the mounting directionality of the L-shaped terminal is determined, and the drawbacks of the conventional battery can be eliminated.

[0011]

As described above, in the battery of the present invention, when the L-shaped terminal is inserted into the recessed portion and welded to the pole, the small protrusions provided on both sides of the L-shaped terminal or both side walls of the recessed portion of the lid are used. Since the L-shaped terminals are automatically positioned, the connecting surfaces of the L-shaped terminals are aligned in a certain direction, and the problems of conventional batteries can be completely eliminated, which is a great industrial value. .

[Brief description of drawings]

FIG. 1 is a view showing the structure of an L-shaped terminal portion of the battery of the present invention.

FIG. 2 is a diagram showing a structure of a battery having an L-shaped terminal.

FIG. 3 is a top view showing an assembled battery in which a plurality of batteries are connected by a connecting plate.

FIG. 4 is a diagram showing a structure of an L-shaped terminal portion of a conventional battery.

[Explanation of symbols]

 1 Battery Case 2 Lid 3 L-Shaped Terminal 4 Filler 5 Indentation 6 Battery Element 7 Pole Pillar 8 Exhaust 9 Connection Plate 10 Bolt Nut 11 Small Protrusion

Claims (1)

[Scope of utility model registration request] 1. A terminal structure in which a hollow portion is provided around a terminal penetrating portion of a battery case lid, a pole and an L-shaped terminal are welded at this hollow portion, and the hollow portion is filled with a synthetic resin filler. In the cathode absorption type sealed battery, small protrusions for locating the L-shaped terminal are provided on both side walls below the L-shaped terminal or on both side walls of the lid recess facing the lower both sides of the L-shaped terminal. Sealed battery.