Ultrathin lithium-manganese polymer battery and processing method thereof

A polymer, ultra-thin lithium technology, used in lithium batteries, battery electrodes, battery pack components, etc., can solve problems such as unfavorable improvement of electrode output current density, positive electrode active material affecting battery capacity, high binder resistivity, etc. problems, to achieve stable battery performance and good storage performance, reduce welding, and reduce the effect of thickness

Active Publication Date: 2010-10-20
深圳市超壹新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, due to the high resistivity of the binder, the internal resistance of the electrode is increased, which is not conducive to improving the output current density of the electrode, and the decrease in the proportion of the positive active material affects the capacity of the battery.

Method used

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  • Ultrathin lithium-manganese polymer battery and processing method thereof
  • Ultrathin lithium-manganese polymer battery and processing method thereof
  • Ultrathin lithium-manganese polymer battery and processing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] refer to Figures 1 to 3 As shown, a kind of ultra-thin lithium-manganese polymer battery of the present invention comprises battery body, and battery body is positive electrode 1, negative electrode 2, diaphragm 3 and outer packaging film 4, and positive electrode is made of 10 μ m current collector aluminum foil, manganese dioxide, conductive The thickness of the positive electrode is 0.1 mm, which is equivalent to 90 μm after coating and rolling; the tab of the positive electrode 1 in this embodiment is formed by the extension of the current collector aluminum foil outside the outer packaging film 4 and compounded with polymer Composed of propylene; the negative electrode 2 is made up of a metal lithium sheet and a nickel strip, and the tab of the negative pole 2 is composed of an extension of the nickel strip outside the outer packaging film 4 and composite polypropylene; the overall thickness of the battery is about 0.30mm; in this embodiment, the two The weight ra...

Embodiment 2

[0038] refer to Figure 4 to Figure 6As shown, the present invention includes positive electrode 1, negative electrode 2, separator 3 and outer packaging film 4. The positive electrode is composed of 50 μm current collector aluminum foil, manganese dioxide, conductive agent and binder. The thickness of the positive electrode is 0.2mm, which is equivalent to The thickness after coating and rolling is 150 μm; the tab of the positive electrode 1 in this embodiment is composed of the extension of the current collector aluminum foil outside the outer packaging film 4 and compounded with polyethylene; the negative electrode 2 is composed of metal lithium sheet and copper strip, and the negative electrode 2 The tabs are formed by the extension of the copper tape outside the outer packaging film 4 and composite polyethylene; the overall thickness of the battery is about 0.50mm; the weight ratio of manganese dioxide in this embodiment is 95%; the weight ratio of the conductive agent is ...

Embodiment 3

[0040] refer to Figure 7 to Figure 9 As shown, an ultra-thin lithium-manganese polymer battery of the present invention includes a positive electrode 1, a negative electrode 2, a separator 3 and an outer packaging film 4, and the positive electrode is composed of a 30 μm current collector aluminum foil, manganese dioxide, a conductive agent and a binder , the thickness of the positive electrode is 0.18 mm, which is equivalent to a thickness of 150 μm after coating and rolling; the tab of the positive electrode 1 in this embodiment is composed of the extension of the current collector aluminum foil outside the outer packaging film 4 and composite polypropylene; the negative electrode 2 is composed of Metal lithium sheet and steel belt are made up, and the tab of negative electrode 2 is made up of steel belt outside the extension of outer packaging film 4 and composite polypropylene; The overall thickness of battery is about 0.40mm; The weight ratio of manganese dioxide in the p...

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Abstract

The invention discloses an ultrathin lithium-manganese polymer battery and a processing method thereof, belonging to the technology of lithium and manganese batteries. The technical scheme is that the ultrathin lithium-manganese polymer battery comprises an anode, a cathode, a diaphragm and an external packaging film. The anode consists of current collector aluminum foil, manganese dioxide, a conductive agent and a binder, the thickness of the anode is 0.03-0.2 mm, and the lead of the anode is formed in such a way that the extending part of the current collector aluminum foil outside the external packaging film is compounded with polypropylene or polyethylene. The cathode consists of a metal lithium sheet and a nickel strap or a copper strap or a steel strap, and the lead of the cathode is formed in such a way that the extending part of the nickel strap or the copper strap or the steel strap outside the external packaging film is compounded with polypropylene or polyethylene. The integral thickness of the battery is 0.3-0.5 mm. The processing method comprises the following steps of: (1) preparing the anode; (2) preparing the cathode; and (3) laminating and combining for molding. The invention solves the technical problem of great thickness of a traditional polymer battery, and has important significance for the generalization of various active identification cards.

Description

technical field [0001] The present invention relates to a kind of lithium manganese polymer battery, more specifically, it relates to a kind of ultra-thin lithium manganese polymer battery used for active identification card etc.; The present invention also relates to the processing method of above-mentioned lithium manganese polymer battery . Background technique [0002] At present, in the traditional soft-pack lithium-manganese polymer battery, the positive tab is directly welded on the aluminum foil of the current collector of the positive plate of the battery, and the negative tab is also directly welded on the copper foil of the current collector of the negative plate of the battery. form. Due to the welding process of this process structure, on the one hand, there is a problem of welding quality stability control, and on the other hand, due to the existence of welding points, it is difficult to achieve the limit thickness of the battery as a whole less than 0.6mm. W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/052H01M4/66H01M4/62H01M2/26H01M10/058H01M50/531H01M50/534
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 陈性保
Owner 深圳市超壹新能源科技有限公司
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