Sealed rectangular battery

Abstract

Protruded portions protrude from the end walls of the integrated flat and angular battery jar, whereby the impact of an obstacle, when hitting at the side, is hardly laded on the pole terminals, because it is received by the protruded portions. The portions of the end walls of the integrated battery jar near terminal holes have different thickness at both sides of the terminal holes, therefore maintaining mounting strength of the pole terminals with weld lines dislocated from the positions of the minimum sectional area at the upper parts of the terminals holes. A sealed rectangular battery having high reliability for the impact on the pole terminals are obtained.

Description

(1) Technical field [0001] The invention relates to a sealed rectangular accumulator. A group of pole plates and an electrolytic solution are placed in a rectangular battery tank and sealed. The two ends of the rectangular battery tank in the length direction protrude from poles. (2) Background technology [0002] In recent years, alkaline batteries such as nickel-metal hydride batteries have been used in power supplies for electric vehicles due to their high energy density, and the positive and negative plates are stacked parallel to the long sides in the rectangular battery tank. The hermetically sealed rectangular storage battery with a group of plates can realize miniaturization and high output. This type of storage battery has been disclosed in Japanese Patent Laid-Open Publication No. 7-161377 and the like. [0003] This type of airtight rectangular storage battery 41 such as Figure 7 As shown, the positive and negative poles 44, 45 are protrudingly provided on the li...

AI Technical Summary

Problems solved by technology

[0009] The connection line 58 is not only a part with poor integrity and weak strength of the resin, but also the upper centerline position of the terminal hole 57 is the part with the smallest cross-sectional area and a stress concentration part. The high stress part overlaps with the connection line 58, making the battery slot The internal pressure of 52 increases, and the pole 54 is prone to cracks when subjected to external force or vibration, and the installation strength of the pole 54 cannot be fully ensured.

[0010] In addition, a plurality of sealed rectangular storage batteries 51 are arranged side by side overlappingly on the long sides, and in the restricted use state between the end plates arranged at its two ends, the long sides of each sealed rectangular storage battery 51 are restricted, but the two end walls 53 are not restricted. , so once the internal pressure of the battery rises, it will expand and deform, which will have a bad influence on the connection part of the pole 54.

[0011] In addition, in the sealed rectangular storage battery 51, when connecting the sealed rectangular storage battery 51 to the pole 54 with a bus bar or external wiring, these wirings are clamped by nuts, so a large rotational moment acts on the connection. On the pole 54, a suitable anti-rotation device for the pole is required. The traditional anti-rotation device generally extends the anti-rotation part from the pole 54 as far as possible, and its head engages with a part of the battery slot 52, but the anti-rotation The point engagement between the head of the part and the battery slot bears the rotational torque and produces excessive stress, which makes the head of the anti-rotation part easy to break. If you want to reduce the acting load, the anti-rotation part will be enlarged.

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