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A lithium primary battery containing soft aluminum foil

A technology of aluminum foil and soft state, which is applied in the field of lithium primary batteries, can solve the problems of reducing the conductivity of the positive electrode of the battery, the shedding of the positive active material, and the pulverization of the positive electrode current collector, and achieve the enhanced lithium ion intercalation ability, not easy to fall off, and the conductivity of the positive electrode Good results

Active Publication Date: 2015-11-25
HUIZHOU HUIDERUI LITHIUM BATTERY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the positive electrode current collector is pulverized, which reduces the electrical conductivity of the positive electrode of the battery and the positive active material falls off from the current collector, causing problems such as internal short circuit of the battery.

Method used

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  • A lithium primary battery containing soft aluminum foil
  • A lithium primary battery containing soft aluminum foil
  • A lithium primary battery containing soft aluminum foil

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1: the making of lithium-iron disulfide AA primary battery

[0021] 1. Production of positive electrode

[0022] The positive electrode sheet includes a positive electrode current collector aluminum foil, and the aluminum foil is a soft aluminum foil after high-temperature annealing and softening treatment. The annealing temperature of the aluminum foil is 500°C, the annealing time is 8h, the thickness is 30um, the tensile strength of the aluminum foil after annealing is 80MPa, and the elongation is 5%.

[0023] Pour ferrous sulfide powder, graphite, acetylene black, and polytetrafluoroethylene into a mixing container with a mass ratio of 90:5:3:2, add the dispersant N-methylpyrrolidone, and stir evenly in a vacuum at high speed to make a positive electrode slurry. The positive electrode slurry is evenly coated on the soft aluminum foil, and the coated pole piece is dried, rolled, cut, and tab-welded to make the positive pole piece.

[0024] 2. Cell assemb...

Embodiment 2

[0027] The difference from Example 1 is that the annealing temperature of the aluminum foil is 520°C, the annealing time is 10h, the thickness is 30um, the tensile strength of the aluminum foil after annealing is 82MPa, and the elongation is 6%.

Embodiment 3

[0031] Embodiment 3: the making of lithium-manganese dioxide CR123A primary battery

[0032] 1. Production of positive electrode

[0033] The positive electrode sheet includes a positive electrode current collector aluminum foil, and the aluminum foil is a soft aluminum foil after high-temperature annealing and softening treatment. The annealing temperature of the aluminum foil is 500°C, the annealing time is 8h, the thickness is 30um, the tensile strength of the aluminum foil after annealing is 80MPa, and the elongation is 5%.

[0034] Pour ferromanganese dioxide powder, graphite, acetylene black, and polytetrafluoroethylene into a mixing container at a mass ratio of 89:3:6:2, add dispersant deionized water, and stir evenly in a vacuum at high speed to make a positive electrode slurry . The positive electrode slurry is evenly coated on the soft aluminum foil, and the coated pole piece is dried, rolled, cut, and tab-welded to make the positive pole piece.

[0035] 2. Cell a...

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Abstract

The invention belongs to the field of chemical batteries, and discloses a one-shot lithium battery containing a soft aluminum foil. The one-shot lithium battery comprises a battery cell arranged in a shell, wherein the battery cell comprises a positive plate, a negative plate and a diaphragm, the positive plate comprises a positive current collector aluminum foil, and the aluminum foil is a soft aluminum foil which is softened through high-temperature annealing. According to the one-shot lithium battery containing the soft aluminum foil, provided by the invention, the positive current collector aluminum foil resists lithium ion embedding and cannot be easily pulverized in a discharge process, the conduction performance of the positive plate is excellent, the internal resistance of the battery is reduced, and the discharge capacity is remarkably improved.

Description

technical field [0001] The invention relates to the field of chemical batteries, in particular to a lithium primary battery containing soft aluminum foil. Background technique [0002] Lithium primary batteries have been widely used in production and life in modern society due to their advantages of high energy density, low self-discharge, long storage life, and no heavy metal pollution. For example, lithium-manganese dioxide batteries with a voltage of 3.0V are used Used in smart instruments, medical equipment, and security systems; lithium-iron disulfide batteries with a voltage of 1.5V can replace alkaline batteries and be used in digital products, driving equipment, military equipment and other fields. Lithium primary batteries generally use metal lithium or lithium alloy as the negative electrode. Natural or synthetic metal compounds such as manganese dioxide, ferrous disulfide, copper oxide, magnesium oxide, etc., are mixed with conductive agents and adhesives, and ev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/66H01M4/70H01M6/16
CPCH01M4/661H01M4/75H01M6/162
Inventor 刘念黄晓剑何献文潘文硕
Owner HUIZHOU HUIDERUI LITHIUM BATTERY TECHNOLOGY CO LTD
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