Lithium manganese needle-type battery and manufacturing method thereof

A manufacturing method and technology of lithium-manganese needles, which are applied to the electrodes of primary batteries, battery pack components, non-aqueous electrolyte batteries, etc., can solve problems such as inability to produce, difficult to increase, and small volume, so as to improve production efficiency and increase battery life. capacity, easy operation

Active Publication Date: 2014-04-23
东莞市桥头洁宇诗电子厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The demand for lithium-manganese batteries is increasing day by day in the market, but the assembly of existing lithium-manganese batteries is done manually. Due to the small size of lithium-manganese needle batteries , purely manual production, the current process operation is quite difficult and the efficiency is low; and the capacity of this lithium manganese needle battery is also quite small, in order to increase its capacity, it is necessary to increase the content of positive and negative active materials (MnO2&Li), but the existing It is difficult to increase the content of MnO2, the positive electrode active material in the process. If the density of the positive electrode sheet is increased or the proportion of PTFE additives is reduced, the operator will easily crack when the positive electrode sheet is rolled, resulting in failure to produce
In addition, the existing lithium-manganese needle batteries have defects in leak resistance and storage performance.

Method used

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  • Lithium manganese needle-type battery and manufacturing method thereof

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Embodiment 1

[0033] Embodiment one A method for making a lithium-manganese needle battery, characterized in that, comprising the following steps:

[0034] (1) Preparation of materials, production of positive electrode powder, weighing 40% of manganese dioxide, 3% of graphite powder, 3% of acetylene black, 1% of polytetrafluoroethylene, 3% of absolute ethanol, 50% of Water, put the manganese dioxide into the stainless steel box, and then put the stainless steel box with the manganese dioxide into the high-temperature oven, the temperature of the oven is 380°C, after baking for 8 hours, take it out and cool it at room temperature and seal it for later use ;

[0035] (2), dry mixing, dry mixing the manganese dioxide, graphite powder and acetylene black weighed in the first step, and the dry mixing time is 10 minutes;

[0036] (3) To prepare a sticky cleaner, add the anhydrous ethanol weighed in the first step into 60% PTFE and stir, then add a small amount of pure water at 60°C, and stir f...

Embodiment 2

[0046] Embodiment two A method for making a lithium-manganese needle battery, characterized in that, comprising the following steps:

[0047] (1) Preparation of materials, production of positive electrode powder, weighing 45% of manganese dioxide, 2% of graphite powder, 2% of acetylene black, 0.5% of polytetrafluoroethylene, 2% of absolute ethanol, 48.5% of Water, put the manganese dioxide into the stainless steel box, then put the stainless steel box with manganese dioxide into the high-temperature oven, the temperature of the oven is selected at 390°C, after baking for 10 hours, take it out and cool it at room temperature spare;

[0048] (2), dry mixing, dry mixing the manganese dioxide, graphite powder and acetylene black weighed in the first step, and the dry mixing time is 15 minutes;

[0049] (3) To prepare a sticky cleaner, add the anhydrous ethanol weighed in the first step into 60% PTFE and stir, then add a small amount of pure water at 60°C, and stir for 8 minutes...

Embodiment 3

[0059] Embodiment three A method for making a lithium-manganese needle battery, characterized in that, comprising the following steps:

[0060] (1) Preparation of materials, production of positive electrode powder, weighing 49% of manganese dioxide, 1% of graphite powder, 1% of acetylene black, 0.3% of polytetrafluoroethylene, 1% of absolute ethanol, 47.7% of Water, put the manganese dioxide into the stainless steel box, then put the stainless steel box with manganese dioxide into the high-temperature oven, the temperature of the oven is selected at 400°C, after baking for 15 hours, take it out and cool it at room temperature. spare;

[0061] (2), dry mixing, dry mixing the manganese dioxide, graphite powder and acetylene black weighed in the first step, and the dry mixing time is 20 minutes;

[0062] (3) To prepare a sticky cleaner, add the anhydrous ethanol weighed in the first step into 60% PTFE and stir, then add a small amount of pure water at 60°C, and stir for 10 min...

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Abstract

The invention discloses a lithium manganese needle-type battery and a manufacturing method of the lithium manganese needle-type battery. The lithium manganese needle-type battery comprises a cylindrical battery shell and a cathode conductive rod, wherein an opening is formed in one end of the battery shell; at least one anode powder ring is arranged in the cavity of the battery shell; one end of the cathode conductive rod extends into the cavity of the battery shell from the opening and is rolled with a lithium film layer; a diaphragm layer is rolled on the outer surface of the lithium film layer; electrolyte is injected into the cavity of the battery shell; an anti-leakage rubber plug is arranged at the opening; a clamping groove is formed in the upper end of the battery shell. According to the manufacturing method, the prepared anode powder ring is directly pressed into the battery shell; the anode assembling process does not need to be performed in dry environment, such as a glove box; in the dry environment, the rolled cathode and the cathode conductive rod of the diaphragm are inserted into the anode powder ring; the operation of pressing into the anode powder ring is performed in batches through workpiece clamps; over 100 anode powder rings can be assembled at one time; the operation is simple and convenient; the disadvantages caused by a winding mode adopted by the conventional cathode sheet are avoided; the production efficiency of the battery is greatly improved.

Description

technical field [0001] The invention relates to the field of battery manufacturing, in particular to a lithium-manganese needle-type battery and a manufacturing method thereof. Background technique [0002] Lithium-manganese battery was first successfully developed in Japan in 1975, and has developed into the most widely used lithium battery in the market and the largest production volume. It is the battery variety with the lowest price and the best safety among lithium series primary batteries. Currently known lithium-manganese batteries are cylindrical, button-type, soft-packed and other chargeable primary batteries. [0003] The demand for lithium-manganese batteries is increasing day by day in the market, and the assembly of existing lithium-manganese batteries is made manually. Due to the small size of lithium-manganese needle batteries and pure manual production, the current process operation is quite difficult and the efficiency is low; and The capacity of this lithi...

Claims

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Application Information

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IPC IPC(8): H01M6/14H01M2/14H01M4/08H01M50/46
CPCH01M4/08H01M6/14H01M50/40
Inventor 朱生波
Owner 东莞市桥头洁宇诗电子厂
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