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Battery and portable device

A portable battery technology, applied in nickel storage battery, lead-acid storage battery, alkaline storage battery, etc., which can solve the problems of rising manufacturing costs

Inactive Publication Date: 2004-10-13
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] but, Figure 23 The structure shown has the problem that the rupture film 206 must be provided separately from the prismatic battery case 205, which increases the manufacturing cost.

Method used

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  • Battery and portable device
  • Battery and portable device
  • Battery and portable device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0049] Referring to FIG. 1 , a battery 1 according to Embodiment 1 of the present invention has an exterior can 2 as a cylindrical exterior member, a positive terminal 3 , a safety valve 4 , and a lid 5 . The lid body 5 is fitted into the opening of the exterior can 2 . The positive terminal 3 is attached to the cover body 5 . The external tank 2 is provided with a safety valve 4 .

[0050] The outer can 2 is made of iron, has a square shape, and has a cylindrical side surface 2a and a bottom surface 2b serving as a negative terminal, and the bottom surface is connected to the side surface 2a. The side 2a is composed of four planes. A safety valve 4 is provided on the largest plane. The side surface 2a and the bottom surface 2b are electrically connected, and they are both at the same potential.

[0051]A lid body 5 is attached to the exterior can 2 by welding. The cover body 5 is shaped to close the opening formed by the side surface 2a. Since the lid body 5 and the sid...

Embodiment approach 2

[0058] Referring to FIG. 3 , a battery 11 a according to Embodiment 2 of the present invention has a cylindrical exterior can 12 as an exterior member, a positive electrode terminal 13 , a safety valve 14 , and a lid 15 . The lid 15 is fitted to the opening of the exterior can 12 . The positive terminal 13 is attached to the cover body 15 . The outer tank 12 is provided with a safety valve 14 .

[0059] The iron outer can 12 has a cylindrical side surface 12a and a disk-shaped bottom surface 12b serving as a negative electrode terminal. The side surface 12a is a cylindrically curved surface having a certain curvature, and the safety valve 14 is formed on the surface thereof. The bottom of the side surface 12a is provided with a bottom surface 12b.

[0060] The side surface 12a forms an opening, and the cover 15 is fitted into the opening. Cover body 15 is disc-shaped, made of iron. A positive terminal 13 is attached to the central portion of the lid body 15 . The positiv...

Embodiment approach 3

[0068] refer to Figure 5 In the battery 11b according to Embodiment 3 of the present invention, the fact that the safety valve 18 is formed by laser is different from that of forming the safety valve 14 by pressing or the like. Figure 4 The battery 11a shown is different. Due to this difference in manufacturing method, the thinner portion 12d constituting the safety valve 18 is formed by removing a part of the outer surface of the side 12 . That is, on the thinner portion 12d, the outer surface of the side 12a is removed, but the inner surface is not removed

[0069] In the battery 11b thus constituted, it is also consistent with Fig. 1 and figure 2 The battery 1 shown has the same effect.

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Abstract

A battery (1, 11a to 11c, 31 to 36) includes a cylindrical or polygonal exterior can (2, 12); a safety valve (4, 14, 18, 19, 41 to 46) provided to the exterior can (2, 12) to reduce an internal pressure of the battery (1, 11a to 11c, 31 to 36). The exterior can (2, 12) includes: a relatively thick portion (2a, 2c, 12c) and a relatively thin portion (2d, 12d, 41a to 41c, 42a, 42b, 43a to 43d, 44a, 45a, 46a). The relatively thin portion (2d, 12d, 41a to 41c, 42a, 42b, 43a to 43d, 44a, 45a, 46a) constitutes the safety valve (4, 14, 18, 19, 41 to 46).

Description

technical field [0001] The present invention relates generally to batteries and portable instruments, and more particularly to batteries having a safety valve that reduces the internal pressure of the battery when the internal pressure of the battery is high, and a portable instrument using the battery. Background technique [0002] In recent years, with the popularization of portable devices such as mobile phones and notebook personal computers, research has been conducted on batteries used in these devices. The structure of a battery used in a portable device is described, for example, in Japanese Patent Laid-Open No. 7-296790. [0003] Figure 23 It is a perspective view of the battery described in the said gazette. refer to Figure 23 , the battery is composed of an electrode group 204, a square battery case 205 for storing and releasing the electrode group 204, and a sealing plate 212, which seals the electrode group 204 contained in the square battery case 205. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/05H01M10/06H01M10/30H01M50/103H01M50/119H01M50/133
CPCH01M2/1055H01M2/1066H01M2/1241H01M2/0217H01M10/30H01M10/05H01M2/0207H01M10/06H01M2/0295Y02E60/10H01M50/103H01M50/213H01M50/3425H01M50/133H01M50/119H01M50/20
Inventor 花房洁石田博一
Owner MITSUBISHI ELECTRIC CORP