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Manganese dry battery and manganese dry battery manufacturing method

A technology of manganese dry battery and battery cartridge, which is applied in the field of manganese dry battery, can solve the problem of not being able to completely prevent the perforation of the zinc cartridge, and achieve the effect of excellent corrosion resistance

Inactive Publication Date: 2008-07-23
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the zinc cylinder formed by this method, the perforation of the zinc cylinder cannot be completely prevented.

Method used

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  • Manganese dry battery and manganese dry battery manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0047] 1 is a cross-sectional view showing the structure of a manganese dry battery according to a first embodiment of the present invention, and the battery can is composed of a negative electrode zinc can 4 .

[0048] As shown in FIG. 1 , in a bottomed cylindrical negative electrode zinc cylinder 4 , a positive electrode mixture 1 is accommodated through a separator 3 containing an electrolyte solution, and a current collector, namely a carbon rod 2 , is inserted in the center of the positive electrode mixture 1 . Also, the upper opening of the negative zinc cylinder 4 is sealed by the sealing body 5 , the carbon rod 2 passes through the central hole of the sealing body 5 and contacts the positive terminal 11 , and the negative terminal 6 is installed at the bottom of the negative zinc cylinder 4 . In addition, the outer peripheral surface of the negative electrode zinc cylinder 4 is covered with a resin tube 8 , and an outer packaging tube 10 is mounted on the outside of the...

no. 2 approach

[0058] In the first embodiment of the present invention, the reaction of zinc is uniformized by precipitating additive elements other than zinc at the grain boundaries of zinc, and the crystal grain size of zinc is reduced by one When the number of digits or more is higher, the reaction of zinc can be made uniform.

[0059] That is, the negative electrode zinc can 4 used in the manganese dry battery according to this embodiment is characterized in that the negative electrode zinc can 4 is formed of a zinc plate cast after cooling molten zinc containing aluminum, and the The range of aluminum contained in molten zinc is 3 to 80% by weight.

[0060] When the molten zinc containing the above-mentioned amount of aluminum is rapidly cooled, the crystal grain size of the zinc constituting the zinc cylinder can be set to a fine particle size of about 0.01 to 1 μm. As a result, it is possible to realize a zinc cylinder having a crystal grain size reduced by more than one digit compar...

Embodiment

[0069] Next, the results of evaluating the corrosion resistance of the manganese dry battery according to the present invention will be described based on examples. In addition, this invention is not limited by the following Examples.

[0070]

[0071] A. Manufacture of zinc cylinder

[0072] This mixture in which 1000 ppm of Pb was added to zinc having a purity of 99.99 wt % was melted at a temperature of about 500° C. using a melting furnace to obtain molten zinc. In addition, the molten zinc is cooled to 180°C to 200°C at a cooling rate of 70°C / S, and then pressed into a plate shape with a specified thickness and punched with a press to obtain a circular tablet of a specified size. . By coating the small piece with graphite powder as the main component of lubricant or lubricant containing zinc stearate, and putting them into the mixer for stirring, the lubricant is coated on the surface of the zinc round small piece . Then, a bottomed cylindrical single 3 type (R6 siz...

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PUM

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Abstract

An added element other than zinc is yielded at the grain boundaries of zinc forming a negative electrode zinc can. The added element includes at least one element selected from the group of Pb, Bi, Ca, Mg, Si, Al, and In. The zinc can is formed in such a manner that: melted zinc containing the added element is quenched at a quenching rate of 75 to 100° C. / second for casting into a zinc plate; and the thus cast plate is subjected to impact molding at a temperature in the range between 20 and 30° C.

Description

technical field [0001] The present invention relates to a manganese dry battery having a negative electrode zinc cylinder excellent in corrosion resistance, and a negative electrode zinc cylinder used for the manganese dry battery. Background technique [0002] Negative zinc canisters used in manganese dry batteries have the problem of reduced battery capacity or deterioration of discharge characteristics due to self-discharge. In order to address these problems, the corrosion resistance of the zinc canister has traditionally been improved by adding lead to zinc. [0003] On the other hand, from the viewpoint of preventing environmental pollution, a technique for improving the corrosion resistance of zinc cylinders without using lead is under study. [0004] For example, Patent Documents 1, 2, and 3 describe methods of preventing zinc from being corroded by forming a layer of indium or bismuth on the surface of a zinc cylinder. This method is to use the characteristics of i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/06H01M2/02H01M6/06H01M50/119
CPCC22C18/04C22C21/10H01M2/027H01M6/08H01M4/42H01M2/0275H01M2/0285C22C18/00H01M50/545H01M50/119
Inventor 岛村治成布目润加藤文生
Owner PANASONIC CORP
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