Unlock instant, AI-driven research and patent intelligence for your innovation.

Layered manganese dry cell battery

A technology for manganese dry batteries and unit cells, applied in the field of laminated manganese dry batteries, can solve problems such as insufficient research on mechanical strength and corrosion resistance, and achieve the effects of excellent high-speed discharge characteristics, improved corrosion resistance, and reduced environmental load

Inactive Publication Date: 2007-11-28
PANASONIC CORP
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical strength and corrosion resistance of the zinc plate for the negative electrode of the laminated manganese dry battery have not yet been sufficiently studied.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Layered manganese dry cell battery
  • Layered manganese dry cell battery
  • Layered manganese dry cell battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4 and comparative example 1～6

[0039] The unit cell shown in Fig. 1 was manufactured as follows.

[0040] The carbon film 15 formed on one surface of the zinc plate 11 of the zinc-carbon bonded pole plate 16 and the cup made of polyvinyl chloride are bonded by an adhesive 17 mainly composed of vinyl chloride-vinyl acetate copolymer. The inner bottom surface of the heat-shrinkable resin tube 12 is bonded to obtain the unit cell case shown in FIG.

[0041]A cup-shaped separator 13 is provided inside the unit cell case, and an electrolytic solution is injected into the separator 13 . The separator 13 was obtained by applying a paste obtained by dissolving an adhesive mainly composed of crosslinked starch and vinyl acetate in an alcohol-based solvent on kraft paper and drying it. As the electrolytic solution, an aqueous solution containing 30% by weight of zinc chloride and 1% by weight of ammonium chloride was used. Then, the positive electrode mixture 14 is inserted inside the separator 13 , and the resin t...

Embodiment 5～18

[0062] Add InCl to the paste of the separator 3 or BiCl 3 , so that the separator contained In or Bi in an amount shown in Table 3 per 100 parts by weight of dry solid content in the paste. Except for this, a laminated manganese dry battery was produced by the same method as in Example 2, and evaluation was performed in the same manner as above. The evaluation results are shown in Table 4.

[0063] Contents of various elements in the separator (parts by weight)

[0064] Vickers hardness of zinc plate

[0065] When the content of In or Bi is 0.01 to 1 part by weight per 100 parts by weight of the dry solid content of the paste, the storage characteristics of the battery are improved.

Embodiment 19～30

[0067] Add InCl to the paste of the separator 3 and BiCl 3 , so that the separator contained In and Bi at the ratio shown in Table 5 per 100 parts by weight of the dry solid content in the paste. Except for this, a laminated manganese dry battery was produced by the same method as in Example 2, and evaluation was performed in the same manner as above. The evaluation results are shown in Table 6.

[0068] Contents of various elements in the separator (parts by weight)

[0069] Vickers hardness of zinc plate

[0070] When the total content of In and Bi is 0.01 to 1 part by weight per 100 parts by weight of the dry solid content of the paste, the storage characteristics are further improved.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Vickers hardnessaaaaaaaaaa
Vickers hardnessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

A highly reliable layered manganese dry battery in which the environmental load is reduced by reducing the quantity of lead in the negative electrode zinc plate and high rate discharge characteristics and excellent storage characteristics are ensured by improving the strength and corrosion resistance of the negative electrode zinc plate. The layered manganese dry battery includes a plurality of element cells each comprising a cup-like heat shrinkage resin tube having a hole in the center of the bottom face, an element cell case consisting of a negative electrode zinc plate having a carbon film on one side and arranged inside the bottom face of the heat shrinkage resin tube, a separator composed of a paper coated with a paste material and arranged inside the element cell case, and a positive electrode mix contained in the element cell case through the separator. The battery is characterized in that the Vickers hardness of the negative electrode zinc plate is 45-55 Hv.

Description

technical field [0001] The present invention relates to a laminated manganese dry battery, and more specifically, to an improvement of a negative electrode zinc plate. Background technique [0002] Conventionally, 0.4% by weight of lead has been added to the negative electrode zinc plate of laminated manganese dry batteries in order to improve the corrosion resistance of zinc. However, in recent years, in order to prevent environmental pollution caused by used batteries, it is strongly desired that no harmful substances such as lead be used in battery components as much as possible. [0003] For cylindrical manganese dry batteries, as a method of improving the corrosion resistance of the negative electrode zinc can, it has been proposed, for example, to add a chloride of In or a compound of Bi to the paste coated on the paper of the separator ( Patent Documents 1 and 2). [0004] However, when In and Bi are added, there is a problem that the high-rate discharge characteris...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/46H01M4/42H01M2/16H01M50/429
CPCH01M4/50H01M2/0222H01M6/12H01M4/42H01M2/1653H01M50/109H01M50/429
Inventor 石田努
Owner PANASONIC CORP