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Battery differential thickness steel casing and its manufacturing technique

A production process and steel shell technology, applied in the field of battery differential thickness steel shell and its production process, can solve the problems such as the wall thickness can be moderately reduced, the wall thickness cannot be reduced, etc., to achieve stable product quality, high production efficiency, increase in The effect of filling

Inactive Publication Date: 2009-08-19
GUANGDONG ZHENGLONG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Experiments have proved that the wall thickness at both ends of the existing alkaline battery steel shell cannot be reduced, while the wall thickness of the middle section of the steel shell cylinder can be moderately reduced, that is, it is required to provide an alkaline battery steel shell with unequal thickness structure and its Production Process

Method used

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  • Battery differential thickness steel casing and its manufacturing technique
  • Battery differential thickness steel casing and its manufacturing technique
  • Battery differential thickness steel casing and its manufacturing technique

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 as figure 1 Shown: a steel case with poor thickness of the battery, which is a hollow cylinder with the positive head 1 closed and the shell mouth 3 enlarged and open. The outer surface of the hollow cylinder is a cylindrical surface, and the thinnest wall thickness of the middle section 2 of the hollow cylinder is 0.18mm, which is smaller than the wall thickness of the positive electrode head 1 and the shell mouth 3 of 0.25mm.

[0032] The thickness of each part of the steel shell of the existing alkaline battery with equal thickness structure is 0.25mm, and the thickness of the steel shell of the battery is reduced from 0.25mm to 0.18mm under the premise of maintaining the strength requirement; The inner cavity space of the casing is increased, and the volume of the cylinder is increased by 4%, thereby increasing the filling amount of the active material, improving the discharge performance of the battery, and prolonging the service life.

Embodiment 2

[0033] Example 2 as Figure 2-3 Shown: A production process of a steel case with a different thickness of the battery is processed sequentially along the following stations on a multi-station automatic punching machine;

[0034] [1] According to the size required by the steel shell blank, the raw material is punched and cut into a disc and shallow stretched into a bowl shape;

[0035] [2] Transition station, no action;

[0036] [3] Shallow stretching, the first time to reduce the diameter of the blank and increase the height;

[0037] [4] Shallow stretching, the second time to reduce the diameter of the blank and increase the height;

[0038] [5] Retain the wall thickness of the positive head 1, stretch the hollow cylinder, and reduce the wall thickness of the middle section 2 of the hollow cylinder;

[0039] [6] Deep drawing the hollow cylinder, reducing the diameter, increasing the height, and reducing the wall thickness of the middle section 2 of the hollow cylinder;

...

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Abstract

The invention relates to a cell differential steel shell and a process for producing the same. The cell differential steel shell is a hollow cylinder which has a closed anode head and an enlarged and open shell opening, with the wall thickness of the middle segment of the hollow cylinder being smaller than that of the anode head as well as of the shell opening. The process comprises the following: a step of blanking and light drawing by means of a multi-stage punch, which forms a bow-shaped blank; a step of redrawing, which reduces the diameter of the blank, increases the height of the blank and reduces the wall thickness of the middle segment of the hollow cylinder, keeping the wall thickness of the anode head; a step of deep drawing, which reduces the diameter, increases the height and reduces and keeps the outer diameter of the hollow cylinder and the wall thickness of the middle segment to the standard thickness required by the design; a step of deep drawing, which forms the shell opening and keeps the thickness of the shell opening equal to that of the blank; a step of shaping the anode head and punching two steps, which keeps the thickness of the anode as well as the two steps equal to that of the blank; a step of punching shear of the scrap of the shell opening, which forms the finished product of the differential steel shell. The invention is capable of increasing the capacity of the cell steel shell, thereby increasing the filling amount of an active substance, improving the discharge performance of the cell and prolonging the service life of the cell.

Description

technical field [0001] The invention relates to a battery shell and its production process, in particular to a battery differential thickness steel shell and its production process. Background technique [0002] With the development of the national economy and the improvement of people's living standards, the demand for batteries at home and abroad continues to increase. At present, battery production is developing in the direction of large capacity, long life and no pollution. my country is the largest battery production country in the world, but the structure of battery products in our country is still very unreasonable. In 2005, alkaline batteries accounted for only 30% of the total, which is far from 70-80% in developed countries. Ordinary zinc-manganese batteries with high performance and pollution account for most of the output, which not only wastes a lot of resources, but also brings serious pollution to the environment. Therefore, it is imminent to produce ultra-hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/02H01M50/119
CPCY02E60/10
Inventor 黄培龙黄益光黄伟杰杨俊生曾爱文
Owner GUANGDONG ZHENGLONG
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