Method for injecting electrolyte into shell of battery

A technology of injecting electrolyte and electrolyte, which is applied in the direction of battery components, circuits, electrical components, etc., can solve the problems of easy volatilization of electrolyte, change of actual composition of electrolyte, cumbersome operation, etc. Injection time and the effect of improving productivity

Active Publication Date: 2011-06-29
FUJIAN NANPING NANFU BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the organic electrolyte is volatile, the actual composition of the electrolyte injected into the battery often changes, and sealing operation is required, and the pipeline through which the electrolyte passes and the battery case must be heated, which is cumbersome to operate.

Method used

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  • Method for injecting electrolyte into shell of battery
  • Method for injecting electrolyte into shell of battery
  • Method for injecting electrolyte into shell of battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0048] The present invention will be further described below by way of examples. It should be noted that these examples do not limit the protection scope of the present invention.

preparation example

[0050] The battery involved in the embodiment of the present invention is an AA battery, and its preparation method is as follows:

[0051] 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), the mixing ratio is 4:6 (weight ratio).

[0052] 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:

[0053] FeS 2 : 91% by weight; graphite: 6% by weig...

Embodiment 1

[0057] Get 10 battery casings without electrolyte obtained in the preparation example, weigh the battery weight, and place them symmetrically figure 1 On the centrifuge shown, the open end of the battery is close to the central axis of the centrifuge (rotation axis), and the closed end is away from the central axis of the centrifuge. The placement direction of the battery is 30° from the horizontal direction. The above-mentioned organic electrolytic solution was supplied into the case from the electrolytic solution supply device through the open end of the case. Then remove the electrolyte supply machine. Set the rotation speed of the centrifuge to 1200 rpm, start the centrifuge for 2 minutes, and then take out the battery.

[0058] Observe the electrolyte absorption of the battery and seal it, then weigh the battery again and calculate the electrolyte weight injected into each battery. The theoretical empty volume in the AA-type lithium-iron disulfide battery casing is cal...

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Abstract

The invention relates to a method for injecting electrolyte into a shell of a battery. The battery is a lithium-iron disulfide battery; the shell is provided with an open end and a closed end; and the inner side of the closed end is provided with a battery cell. The method comprises a first electrolyte injection step, wherein the electrolyte is injected into the shell through the open end, and then the shell is rotated around a vertical rotating shaft in a mode that the open end is inward and close to the rotating shaft, the closed end is outward and far away from the rotating shaft, and the open end is higher than the closed end. The electrolyte is injected into the shell of the battery by centrifugal force, so that the electrolyte is fully absorbed on the battery cell and electrode sheets, and the set discharge capacity of the battery can be realized to the greatest extent under a large-current discharge condition, and the injection time of the electrolyte can be remarkably shortened simultaneously, so that the production efficiency of the battery is greatly improved.

Description

technical field [0001] The invention relates to the field of primary lithium batteries, in particular to a method for injecting an electrolyte into a battery casing, and more particularly to a method for injecting an electrolyte into a lithium-iron disulfide battery casing. Background technique [0002] As a small and convenient mobile power source, battery has become a necessity in people's life. Lithium batteries, in particular, have become the leading products in the battery market due to their advantages such as high voltage platform, high discharge specific capacity, long life, light volume and no pollution. [0003] In lithium batteries, lithium-iron disulfide batteries are a kind of FeS 2 The primary lithium battery is a positive electrode active material, metal Li is used as a negative electrode active material, and an organic electrolyte is used as an electrolyte, and its working voltage can reach 1.5V. Compared with alkaline batteries, lithium-iron disulfide batt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/36
CPCY02E60/12Y02E60/10
Inventor 张清顺赵洋常海涛林建兴苏盛陈进添
Owner FUJIAN NANPING NANFU BATTERY
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