Cylindrical flexible packed lithium ion storage cell with aluminum-plastic composite film

An aluminum-plastic composite film, lithium ion technology, applied in the direction of secondary batteries, battery electrodes, battery pack components, etc., can solve the problems of battery failure, heavy weight, complicated methods of changing size and shape, etc., to reduce the possibility, The effect of improving service life and reliability

Inactive Publication Date: 2007-11-14
CITIC GUOAN MENGGULI NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The current lithium-ion batteries are generally packaged in rigid shells or flexible shells. Rigid shells are generally made of metal materials, such as stainless steel or aluminum alloy, and high-strength engineering plastics can also be used. It has high strength but heavy weight. Moreover, the method of changing the size and shape is complicated, and the flexible shell is packaged with aluminum-plastic film. Its characteristics are low material cost, light weight, flexible change of shell size, fast production speed, and good safety. However, the current flexible packaging lithium ion Batteries are all in a square structure, although the space can be fully utilized, but there are gas inflation and leakage problems, which cause the battery performance to deteriorate rapidly and cause the battery to fail

Method used

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  • Cylindrical flexible packed lithium ion storage cell with aluminum-plastic composite film

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Experimental program
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Effect test

Embodiment 1

[0020] Cylindrical aluminum-plastic composite film flexible packaging lithium-ion battery, as shown in Figure 1, the shell (2) is a cylindrical body in aluminum-plastic composite film flexible packaging, lithium manganate is selected as the positive electrode material, and the positive electrode sheet is made of aluminum foil (5 ), choose graphite as the negative electrode material, apply it on the copper foil to make the negative pole piece (4), choose the aluminum foil piece as the positive pole tab (1), and the copper foil piece as the negative pole tab (7). (3) Cylindrical electrode roll core formed by stacking the negative pole piece, the separator and the positive pole piece together, the outer two ends and the middle of the electrode roll core are wrapped with fixing tape (not shown in the figure), and one of the two ends is protruded The positive and negative pole tabs are on the same center line, and the plane of the positive and negative pole tabs is perpendicular to ...

Embodiment 2

[0022] Cylindrical aluminum-plastic composite film flexible packaging lithium-ion battery, as shown in Figure 1, the shell is a cylindrical body of aluminum-plastic composite film flexible packaging, and lithium cobaltate and lithium nickelate are selected as the positive electrode material in a ratio of 2:1 by weight. Coating on an aluminum mesh to make a positive pole piece (5), using a composition of soft carbon and hard carbon with a ratio of 2:1 by weight as the negative electrode material, coating on a copper net to make a negative pole piece (4), selecting an aluminum foil It is the positive pole tab (1), the nickel foil is the negative pole tab (7), and the shell is equipped with a cylindrical electrode winding core formed by superimposing the diaphragm (3), the negative pole piece, the diaphragm and the positive pole piece, The two ends and the middle of the electrode winding core are wound with fixed tape (not shown in the figure), and the two pairs of positive and ne...

Embodiment 3

[0024] Cylindrical aluminum-plastic composite film soft-packaged lithium-ion storage battery, as shown in Figure 1, the housing (2) is a cylindrical shape of aluminum-plastic composite film soft-package, and the weight ratio of lithium nickel cobaltate, lithium cobaltate and lithium iron phosphate is 2: The composition with a ratio of 0.5:0.5 is a positive electrode material, coated on a stainless steel foil to make a positive electrode sheet (5), selecting metallic lithium as a negative electrode material, coated on a nickel foil to make a negative electrode, and using an aluminum foil to make a negative electrode sheet (4 ), the aluminum foil is selected as the positive tab (1), the nickel foil is used as the negative tab (7), and the shell is equipped with a cylinder composed of a diaphragm (3), a negative pole piece, a diaphragm and a positive pole piece. Shaped electrode core, the two ends and the middle of the electrode core are wound with fixed tape (not shown in the fig...

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Abstract

This invention relates to one column polyethylene laminated film flexible lithium ion accumulator, which is characterized by the following: the shell is of polyethylene compound film packing column part; using compound metal oxidation and its compound as positive electrode materials free of imbedded lithium ion; using imbedded and removed lithium ion materials and its compound materials as negative materials and using aluminum foil as positive slice and carbide as negative materials and copper and nickel as negative slices; overlapping the isolated film, negative slices to form one column electrode board core and its outside fixed band; two end positive and negative electrode handles are parallel at one central line.

Description

technical field [0001] The invention relates to a cylindrical aluminum-plastic composite film soft-packaged lithium-ion storage battery, which belongs to the field of energy batteries. technical background [0002] The current lithium-ion batteries are generally packaged in rigid shells or flexible shells. Rigid shells are generally made of metal materials, such as stainless steel or aluminum alloy, and high-strength engineering plastics can also be used. It has high strength but heavy weight. Moreover, the method of changing the size and shape is complicated, and the flexible shell is packaged with aluminum-plastic film. Its characteristics are low material cost, light weight, flexible change of shell size, fast production speed, and good safety. However, the current flexible packaging lithium ion Batteries are all in a square structure. Although the space can be fully utilized, there are gas inflation and leakage problems, which cause the battery performance to deteriorate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/40H01M10/36H01M2/02H01M4/02H01M4/58H01M4/48H01M4/64H01M10/0525H01M10/0587H01M50/107H01M50/119H01M50/121H01M50/124H01M50/136H01M50/193H01M50/531
CPCH01M10/0587H01M2/022H01M2/08H01M2/0287H01M10/0525Y02E60/122H01M2/0275Y02E60/10H01M50/107H01M50/124Y02P70/50H01M50/121H01M50/193H01M50/136H01M50/119
Inventor 其鲁郝德利徐华晨晖安平岳载吴宁宁雷向利
Owner CITIC GUOAN MENGGULI NEW ENERGY TECH
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