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Flexibly-packaged ternary power battery and preparation method thereof, and positive pole piece of battery

A battery positive electrode and positive electrode sheet technology, which is applied to battery electrodes, small-sized batteries/battery packs, large-sized batteries/battery packs, etc., can solve problems such as poor safety performance, fire and explosion of battery cells, and improve battery life. Performance, prevention of explosion, effects of stress buffering

Inactive Publication Date: 2017-10-27
马鞍山活力电动科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the relatively poor safety performance of the existing lithium-ion battery, and to provide a soft-packed ternary power battery and a battery positive electrode. piece

Method used

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  • Flexibly-packaged ternary power battery and preparation method thereof, and positive pole piece of battery
  • Flexibly-packaged ternary power battery and preparation method thereof, and positive pole piece of battery
  • Flexibly-packaged ternary power battery and preparation method thereof, and positive pole piece of battery

Examples

Experimental program
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Effect test

Embodiment 1

[0055] Such as figure 1 As shown, a soft pack ternary power battery (3.65V / 40Ah) of this embodiment includes a positive pole piece 2, a negative pole piece 1, a diaphragm, an electrolyte and a battery case, wherein the positive pole piece 2, the negative pole piece The pole piece 1 and the diaphragm form a diaphragm / negative electrode / diaphragm / positive electrode laminated battery core. The diaphragm is coated with polyethylene+ceramics, the thickness of the diaphragm is 15 μm, the electrolyte is lithium hexafluorophosphate, and the battery case is packaged by aluminum-plastic film.

[0056] Such as figure 2 , image 3 As shown, the positive electrode sheet 2 includes a positive electrode current collector, and the positive electrode current collector adopts an aluminum foil with a thickness of 12 μm. The positive electrode current collector includes a first coating area 202, a second coating area 203 and a connection area 204. The first A coating area 202 is connected to ...

Embodiment 2

[0081] A soft pack ternary power battery (3.65V / 30Ah) of this embodiment has the same structure as that of Embodiment 1, the difference being that the positive current collector is made of aluminum foil with a thickness of 16 μm, and the thickness of the diaphragm is 15 μm. The length of the connection area 204 is 1 / 8 of the length of the first coating area 202 and the second coating area 203 , and the width is 1 / 65 of the width of the first coating area 202 and the second coating area 203 .

[0082] In the present embodiment, the thickness of the positive electrode material layer 205 is 120 μm, and the positive electrode material layer 205 is composed of the following components in mass percentage: nickel cobalt lithium manganese oxide 92%, conductive agent superconducting carbon (Super-P) 2 %, conductive graphite 1%, carbon nanotubes 1.5%, binder polyvinylidene fluoride 3.5%. The negative electrode current collector adopts a copper foil with a thickness of 9 μm, and the thic...

Embodiment 3

[0085] combine Figure 1-Figure 3 , a kind of soft package ternary power battery of this embodiment, its structure is basically the same as that of Embodiment 1, the main difference is that: in this embodiment, the thickness of the positive electrode material layer is 113 μm, and the positive electrode material layer 205 is composed of the following mass The percentage composition of the components: 91% nickel cobalt lithium manganate, 4% superconducting carbon, 1.5% conductive graphite, 2% carbon nanotubes, and 1.5% polyvinylidene fluoride. The negative electrode current collector adopts a copper foil with a thickness of 8 μm, and the thickness of the negative electrode material layer is 124 μm. The negative electrode material layer is composed of the following components in mass percentage: 91% of hard carbon material, 2% of conductive carbon black, and 2% of conductive graphite , styrene-butadiene rubber 4%, sodium carboxymethyl cellulose 1%.

[0086] The preparation metho...

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Abstract

The present invention discloses a flexibly-packaged ternary power battery and a preparation method thereof, and a positive pole piece of the battery, and belongs to the technical field of batteries and preparation methods. The flexibly-packaged ternary power battery comprises a positive pole piece, a negative pole piece, a diaphragm, an electrolyte and a battery shell, wherein the positive pole piece, the negative pole piece and the diaphragm form a diaphragm / negative pole / diaphragm / positive pole lamination type structure battery core; a current collector of the positive pole piece of the battery comprises a first coating area, a second coating area and a connecting area; the first coating area and the second coating area are connected through the connecting area; and the length of the connecting area is smaller than the lengths of the first coating area and the second coating area, and front and back surfaces of the first coating area and the second coating area are provided with a positive pole material layer separately. By adoption of the technical solution of the present invention, on the basis of guaranteeing a large capacity, the safety performance of a lithium ion battery can be remarkably improved, thereby meeting usage requirements of a new energy automobile.

Description

technical field [0001] The invention belongs to the technical field of batteries and preparation methods thereof, and more specifically relates to a soft-packed ternary power battery, a preparation method thereof, and a positive electrode sheet of the battery. Background technique [0002] As a green and environmentally friendly energy source, lithium-ion batteries have been widely used in various fields. Lithium-ion batteries are divided into lithium cobalt oxide batteries, lithium manganese oxide batteries, ternary material batteries, and lithium iron phosphate batteries. Among them, ternary material batteries have obvious advantages in improving the cruising range of new energy vehicles and alleviating users' cruising range concerns due to their high voltage platform, high energy density, high tap density, electrochemical stability, and good cycle performance. At the same time, it also has the advantages of high discharge voltage, relatively large output power, good low t...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M10/058H01M10/42H01M2/34H01M2/02H01M4/66H01M50/10H01M50/578
CPCH01M4/667H01M10/0525H01M10/058H01M10/4235H01M50/10H01M50/578Y02E60/10Y02P70/50
Inventor 陈晓母浩郑胜涛
Owner 马鞍山活力电动科技有限公司
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