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Rolling device and method for cylindrical battery shell

A cylindrical battery and rolling line technology, which is applied to battery components, circuits, electrical components, etc., can solve problems such as battery failure, polluted batteries, and unpleasant odors, and achieve stable production processes, improve sealing effects, and improve quality products rate effect

Active Publication Date: 2012-07-04
FUJIAN NANPING NANFU BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, if the temperature of the external environment changes drastically, due to the different expansion coefficients of various components and materials in the battery, there will be a gap between the sealing ring and the battery case, which will also cause the organic electrolyte in the battery to leak
[0005] Electrolyte leakage will not only pollute the battery, but also cause the battery to fail to discharge normally, resulting in battery failure; in addition, due to the use of organic solvents in the electrolyte of lithium batteries, leakage will not only cause certain corrosiveness and unpleasant smell, but also The organic solvents used are generally flammable substances, and there are great safety problems

Method used

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  • Rolling device and method for cylindrical battery shell
  • Rolling device and method for cylindrical battery shell
  • Rolling device and method for cylindrical battery shell

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preparation example

[0039] The batteries prepared in the embodiments of the present invention are all AA-type cylindrical lithium-iron disulfide batteries, and the preparation method is as follows:

[0040] FeS 2 The powder (natural pyrite collected from Yunfu, Guangdong) is used as the positive electrode active material, and the material is mixed with the conductive agent (graphite and acetylene black) to make the positive electrode powder. Use an organic solvent to make the adhesive into an adhesive, wherein the adhesive is styrene-ethylene / butylene-styrene block copolymer (SEBS, trade name Kraton G1651), and the organic solvent is produced by Shell A mixture of Shell A100 (aromatic solvent) and Shell OMS (isoparaffin) in a mixing ratio of 4:6 (by weight).

[0041] The above positive electrode powder and binder are mixed in a weight ratio of 2:1 and then stirred to form a slurry. In the dry matter of the positive electrode slurry finally made, the weight ratio of each component is:

[0042] ...

Embodiment 1

[0046] provide as Figure 2A-2B In the rolling device shown, 20 battery casings obtained in the preparation example were provided, divided into two groups of 10 pieces, and then rolled on the battery casings by using the three-wheel rolling process of the present invention. The rolling line height is 4.20mm, and the upper R angle is 0.65mm. The difference is that the rolling line depth of one set of battery cases is 1.10mm, and the rolling line depth of the other set of battery cases is 1.30mm. After the rolling line is finished, inject electrolyte, seal and make AA battery.

Embodiment 2

[0053] provide as Figure 2A-2B The rolling device shown is provided with 20 battery cases obtained in the preparation example, which are divided into two groups with 10 in each group. Then, the rolling line process of the present invention is used to carry out rolling line on the battery case. The rolling line height is 4.20mm, and the rolling line depth is 1.15mm. The difference is: the upper R angle of one set of battery cases is 0.60mm, and the upper R angle of the other set of battery cases is 0.70mm. After the rolling line is finished, inject electrolyte, seal and make AA battery.

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Abstract

The invention provides a rolling device and method for a cylindrical battery shell. The rolling device comprises a main body, a clamping mechanism, three rolling wheels, a first driving mechanism and a second driving mechanism, wherein the clamping mechanism and the three rolling wheels are all arranged at the bottom of the main body; the three rolling wheels are respectively arranged at the vertexes of an equilateral triangle taking the clamping mechanism as the center; the clamping mechanism is used for clamping the upper end of the cylindrical battery shell; the first driving mechanism andthe second driving mechanism are both arranged in the main body; the first driving mechanism is used for driving the three rolling wheels to rotate by taking the clamping mechanism as the center; andthe second driving mechanism is used for driving the three rolling wheels to synchronously move towards the cylindrical battery shell in the rotating process so as to carry out a rolling process on the cylindrical battery shell. By adopting the rolling device provided by the invention to roll, the sealing effect of a battery can be improved, the leakage of electrolyte can be avoided, and the yield of batteries can be increased.

Description

technical field [0001] The invention relates to the field of primary lithium batteries, in particular to a rolling device and a rolling method for cylindrical battery casings. Background technique [0002] In recent years, with the rapid development of electronic technology, especially the wide application of electronic products such as electronic game consoles, video cameras, and digital cameras, the requirements for battery power and capacity have become higher and higher, and traditional alkaline batteries have become difficult. meet its requirements. As a lithium battery that can replace alkaline batteries, due to its advantages of high voltage platform, high discharge specific capacity, long life, light volume and no pollution, it has attracted more and more attention from people, and has become the leading product in the battery market. . [0003] In the manufacturing process of lithium batteries, the battery case should be rolled before sealing to improve the sealin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/02B21D17/04
CPCY02E60/12Y02E60/10
Inventor 张清顺余佑锋常海涛苏盛张志明
Owner FUJIAN NANPING NANFU BATTERY
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