Cylindrical accumulator

A battery, cylindrical technology, applied in the field of alkaline batteries, can solve the problems of large IR voltage drop, high contact resistance, loss and other problems in the melting part, and achieve the effect of excellent current collector structure, high-speed charging and discharging

Inactive Publication Date: 2007-11-28
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] As a result, the melted portion or the joint portion formed by the rib-shaped protrusion 14b and the electrode terminal edge has a high contact resistance, and when the battery is discharged at a large current, such as 3c (current three times the battery capacity), The voltage drop IR across the melted part is too large (resulting in power loss) and thus does not provide satisfactory battery performance

Method used

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Examples

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Embodiment Construction

[0029] Some specific examples of the present invention are described below with reference to the drawings.

[0030] Fig. 1 is a partial cross-sectional side view of a nickel-cadmium storage battery having a protrusion-free current collecting structure shown in an example of the present invention. Battery A has a diameter of 33mm, a height of 61.5mm, and a rated capacity of 5000 milliampere hours (mAh). The structure of the battery A is detailed as follows.

[0031] A sintered nickel positive electrode plate 1 with a thickness of 1.0 mm and a strip-shaped paste cadmium negative electrode plate 2 with a thickness of 0.7 mm are prepared. On the end edges of each electrode plate in the length direction, exposed punching plate parts 3 and 4 are provided with a width of 1.5 mm respectively. Considering the convenience of spirally winding the electrode plate and the firmness of welding, there is a nickel-plated iron plate with a thickness of about 0.08mm for the punching plate 3 of the p...

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Abstract

The present invention provides a cylindrical storage battery, wherein, the current collector formed essentially of a rectangular flat plate is provided with an I-shaped cutout hole which passes the center of the plate and ends inside the plate near to its outer peripheral edge and two of rectangular cutout parts which are approximately at a right angle to the I-shaped hole and extend from the neighborhood of the center of the plate to its outer peripheral part without intersecting the I-shaped hole, downward rib-formed projections being respectively formed integrally at the edge parts of the cutout hole and the respective cutout parts, the respective rib-formed projections crossing the terminal edges of the electrode plate and being welded to the terminal edges at a plurality of spots.

Description

Technical field: [0001] The present invention relates to a cylindrical storage battery having a spirally wound electrode plate assembly, and more particularly, to an alkaline storage battery suitable for, for example, a vehicle driving power source. The battery improves the shape of the current collector welded to the upper and lower parts of the electrode plate assembly to ensure the welding of the spiral winding start part of the electrode plate assembly with the current collector, thereby allowing rapid charging and discharging through the current collector. Background technique: [0002] A variety of different cylindrical alkaline storage batteries are known, and representative ones include nickel-cadmium storage batteries and nickel-metal hydride storage batteries. These batteries are widely used in various devices, such as portable phones and notebook personal computers, because of their high reliability and easy maintenance. In recent years, cylindrical storage batteries s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/26H01M10/24H01M50/528H01M10/28H01M50/533H01M50/536H01M50/538
CPCY02E60/124H01M10/286H01M2/263Y02E60/10H01M50/538Y02P70/50H01M50/536H01M50/533
Inventor 中丸久男铃木宪男江口寿英大西正人
Owner PANASONIC CORP
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