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Syringe type Li-Mn battery and mfg. thereof

A lithium-manganese battery and needle-tube technology, applied in the direction of primary batteries, circuits, electrical components, etc., can solve the problems of low load platform, high battery internal resistance, high price, etc., achieve increased conductivity, overcome large internal resistance, and increase graphite The effect of content

Inactive Publication Date: 2005-01-12
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that PTFE emulsion has no electrochemical activity and is an electronic insulator, which leads to large internal resistance of the battery, low load platform, and high price
[0016] If a lithium-manganese battery with a small volume is to be manufactured, due to the narrow and long interior of the battery case and the small space, it cannot be manufactured by the winding-type pole core production method of a conventional lithium-manganese battery

Method used

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  • Syringe type Li-Mn battery and mfg. thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Formulation of cathode material and manufacture of cathode sheet:

[0035] Manganese dioxide: acetylene black: graphite: polytetrafluoroethylene emulsion: dehydrated alcohol: purified water=(47.0%~48.0%): (4.2%~4.4%): (1.0%~1.6%): (1.3%~ 1.5%): (5.0%-5.5%): (37.0%-40.0%).

[0036] The above formula is used to prepare battery positive electrode slurry, after drying, the water in the slurry is removed, the slurry is evenly mixed with alcohol, and the slurry is rolled into powder sheets of a certain size on a rolling mill. Laminate the powder flakes with the aluminum expanded mesh cut to a certain size on one side, roll them into a positive electrode sheet with a specified thickness, and dry them in an oven. Then cut the positive electrode sheet into a specified size, roll it into a positive electrode roll, and process it by vacuum drying method for use.

[0037] 2. Battery assembly:

[0038] The assembly of the battery is carried out in a dry environment with a rela...

Embodiment 2

[0048] 1. Positive electrode formula and positive electrode sheet manufacturing:

[0049] Manganese dioxide: acetylene black: graphite: polytetrafluoroethylene emulsion: dehydrated alcohol: purified water=(47.0%~48.0%): (4.2%~4.4%): (1.8%~2.1%): (1.3%~ 1.5%): (5.0%-5.5%): (37.0%-40.0%).

[0050] The above formula is used to prepare battery positive electrode slurry, after drying, the water in the slurry is removed, the slurry is evenly mixed with alcohol, and the slurry is rolled into powder sheets of a certain size on a rolling mill. Laminate the powder flakes with the aluminum expanded mesh cut to a certain size on one side, roll them into a positive electrode sheet with a specified thickness, and dry them in an oven. Then cut the positive electrode sheet into a specified size, and process it by vacuum drying method to make the positive electrode sheet for use.

[0051] 2. Battery assembly:

[0052] Use the battery assembly method described in "Method 1".

[0053] The ne...

Embodiment 3

[0057] 1. Positive electrode formula and positive electrode sheet manufacturing:

[0058] Manganese dioxide: acetylene black: graphite: polytetrafluoroethylene emulsion: dehydrated alcohol: purified water=(47.0%~48.0%): (4.2%~4.4%): (2.2%~2.5%): (1.3%~ 1.5%): (5.0%-5.5%): (37.0%-40.0%).

[0059]2. Battery assembly:

[0060] Use the battery assembly method described in "Method 1".

[0061] The needle-tube lithium-manganese battery manufactured by the above method still has strong "stickiness" between the particles in the slurry, but it is slightly worse than "method 1", and the affinity between the slurry and the metal mesh is poor. It is difficult to hang the slurry on the net; the powder is easy to fall off when the pole piece is rolled, resulting in uneven thickness of the pole piece;

[0062] After making the battery test (still taking CR435 as an example): the short-circuit current is 300 to 350mA, and the discharge time is 55 hours at 1mA constant current discharge.

...

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Abstract

Nominal diameter of body case of the battery is 2.0-5.0 mm, and height is 20-80 mm sealed by columned rubber. Formula of anode material are: manganese dioxide : acetylene black : graphite : Teflon latex : absolute ethyl alcohol : pure water = (47.0%-48.0) : (4.2%-4.4%) : (1.0%-3.0%) : (1.3%-1.5%) : (5.0%-5.5%) : (37.0%-40.0%). The preparation method includes compounding materials of anode; fabricating positive pole plate and procedure of assembling battery. In the invention, feed rate of Teflon latex is reduced and content of graphite is increased so as to raise conductivity, and reduce internal resistance.

Description

technical field [0001] The invention relates to a needle-tube lithium-manganese battery and a manufacturing method thereof, belonging to the lithium-manganese battery technology. Background technique [0002] At present, the manufacturing method of conventional lithium-manganese batteries: [0003] 1. Positive electrode formula and positive electrode sheet manufacturing: [0004] Manganese dioxide + acetylene black + graphite + polytetrafluoroethylene emulsion + absolute ethanol + purified water = (47.0% ~ 48.0%) + (4.2% ~ 4.4%) + (0.8% ~ 1.1%) + (3.0% ~ 4.0%)+(5.0%~5.5%)+(37.0%~40.0%). [0005] The above formula is used to prepare the positive electrode slurry of the battery, after drying, the water in the slurry is removed, and the positive electrode powder sheet of the specified thickness is rolled on the rolling mill together with the aluminum mesh cut according to a certain size. Then cut the positive electrode powder sheet into a spec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/00
Inventor 唐致远马聪郑广泉
Owner TIANJIN UNIV
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