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Making method of 3V chargeable button lithium battery lithium-aluminum alloy negative electrode

A lithium-aluminum alloy and a production method technology, which are applied in battery electrodes, lithium batteries, non-aqueous electrolyte batteries, etc., can solve the problems of low manufacturing speed of lithium-aluminum alloy negative electrodes, greatly restricting output, and improving, and achieve shortening time and cost. The effect of increasing the distance, increasing the generation speed, and expanding the contact area

Active Publication Date: 2016-05-04
天津赫维科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the popularization and rapid development of electronic products, the demand for rechargeable lithium / manganese dioxide button batteries is increasing. However, in the production process of existing rechargeable lithium / manganese dioxide batteries, the manufacturing speed of lithium aluminum alloy negative electrodes is very fast. Low, which limits the substantial increase in output

Method used

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  • Making method of 3V chargeable button lithium battery lithium-aluminum alloy negative electrode

Examples

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Embodiment 1

[0011] (1) Weld the ML1220 negative electrode shell with a nickel mesh with a diameter of 3mm and a thickness of 0.2mm at the bottom of the inner side, then degrease, clean it, and dry it at 105°C for 4 hours;

[0012] (2) On an aluminum plate with a purity of 99% and a thickness of 0.25 mm, two discs with a diameter of 9 mm are punched out, and four concentric ring grooves are punched out on one of the aluminum discs. The arc radius of the groove section is 0.3 mm, and the groove width is 0.5mm, 4 grooves are equidistantly distributed, then after degreasing and cleaning, blow dry at 105°C for 2 hours;

[0013] (3) In a drying room with a relative humidity of 0.9%, put the aluminum disc with a ring groove into the negative electrode case, with the ring groove facing up, press the aluminum disc with a plastic pressure head at 0.5 MPa on the pneumatic press, For 3 seconds, fix the aluminum disc inside the negative electrode shell, place a 10mg cube of battery-grade metal lithium...

Embodiment 2

[0017] (1) Weld the ML1220 negative electrode shell with a nickel mesh with a diameter of 3mm and a thickness of 0.2mm at the bottom of the inner side, then degrease, clean it, and dry it at 105°C for 4 hours;

[0018] (2) On an aluminum plate with a purity of 99% and a thickness of 0.25 mm, two discs with a diameter of 9 mm are punched out, and four concentric ring grooves are punched out on one of the aluminum discs. The arc radius of the groove section is 0.3 mm, and the groove width is 0.5mm, 4 grooves are equidistantly distributed, then after degreasing and cleaning, blow dry at 105°C for 2 hours;

[0019] (3) In a drying room with a relative humidity of 0.9%, put the aluminum disc with a ring groove into the negative electrode case, with the ring groove facing upward, press the aluminum disc with a plastic pressure head at 0.5MPa on a pneumatic press, For 3 seconds, fix the aluminum disc inside the negative electrode shell, put the 8mg cube of battery-grade metal lithium...

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Abstract

The invention provides a making method of a 3V chargeable button lithium battery lithium-aluminum alloy negative electrode. The method comprises the following steps: punching an aluminum plate with the purity of 99% or above to form two discs with same diameter, stamping one of the two discs to form a concentric circular groove (as shown in figure in the description), carrying out oil removal and water removal drying on the aluminum discs, laminating the aluminum disc / lithium sheet / aluminum disc in dry environment with the relative humidity being lower than 1%, externally applying a pressure for 10s or above to realize cold rolling of above three layers in order to obtain the lithium-aluminum alloy negative electrode, wherein the interface of the concentric circular groove is arc in shape, the width is 0.5mm, the arc radius is 0.3mm, a distance between circular rings is 0.8mm, a molar ratio of the metal lithium sheet to the aluminum discs is 0.8-1.0, and the concentric circular groove surfaces of the aluminum discs face the metal lithium sheet when the aluminum disc / lithium sheet / aluminum disc are laminated. The method has the advantages of simple process, suitableness for industrial large-scale rapid production, and advanced performances.

Description

technical field [0001] The invention discloses a method for manufacturing a lithium-aluminum alloy negative electrode of a 3V rechargeable lithium battery, belonging to the technical field of chemical power supply energy storage. Background technique [0002] Due to the popularization and rapid development of electronic products, the demand for rechargeable lithium / manganese dioxide button batteries is increasing. However, in the production process of existing rechargeable lithium / manganese dioxide batteries, the manufacturing speed of lithium aluminum alloy negative electrodes is very fast. Low, which limits the substantial increase in production. [0003] The negative electrode of the existing lithium aluminum alloy generally adopts the method disclosed in CN87100735, that is, the lithium aluminum alloy coating is prepared by co-rolling process at room temperature: in an environment with a relative humidity lower than 1%, the commercially available pure aluminum or not Th...

Claims

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Application Information

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IPC IPC(8): H01M4/38H01M4/46H01M4/40H01M4/1395H01M10/052
CPCH01M4/1395H01M4/405H01M4/463H01M10/052Y02E60/10
Inventor 郝德利叶丽光
Owner 天津赫维科技有限公司
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