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Lithium-ion power battery and quick charging electric automobile with same

A power battery and lithium-ion technology, applied in battery electrodes, secondary batteries, circuits, etc., to achieve the effects of improved safety, stable discharge voltage, and improved service life

Inactive Publication Date: 2013-04-17
山东同大新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]1. Lithium dendrites are easily precipitated during overcharging, causing a short circuit of the battery and affecting the safety performance of the lithium battery;
[0005]2. Easy to form SEI film, resulting in low initial charge and discharge efficiency and large irreversible capacity;
[0006]3. The potential of the carbon material is low (close to metal lithium), and it is easy to cause the decomposition of the electrolyte, thus bringing safety hazards;
[0007]4. The volume changes greatly during the process of lithium ion intercalation and extraction, and the cycle stability is poor

Method used

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  • Lithium-ion power battery and quick charging electric automobile with same
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The positive active material includes: 91% lithium nickel manganese oxide (LiNi 0.5 mn 1.5 o 4 ), 5% PVDF, 4% SP;

[0045] The negative electrode active material includes: 90% lithium titanate (Li 4 Ti 5 0 12 ), 5% PVDF, 5% SP;

[0046] Above-mentioned lithium-ion battery preparation steps are as follows:

[0047] Lithium nickel manganese oxide (LiNi 0.5 mn 1.5 o 4 ), PVDF and SP are dissolved in NMP, and the positive electrode slurry is made through a slurry mixing machine;

[0048] Lithium titanate (Li 4 Ti 5 0 12 ), PVDF and SP are dissolved in NMP, and the negative electrode slurry is made by a mixing machine;

[0049] Both the positive and negative electrode current collectors are made of aluminum foil, and the aforementioned positive and negative electrode slurry is uniformly coated on the aluminum foil through a coating machine and wound into a roll, and then baked and rolled to make positive and negative electrode sheets respectively;

[0050] Afte...

Embodiment 2

[0056] The positive active material includes: 96% lithium nickel manganese oxide (LiNi 0.5 mn 1.5 o 4 ), 3% PVDF, 1% KS-6;

[0057] The negative electrode active material includes: 96% lithium titanate (Li 4 Ti 5 0 12 ), 3% PVDF, 1% Ketjen Black;

[0058] Above-mentioned lithium-ion battery preparation steps are as follows:

[0059] Lithium nickel manganese oxide (LiNi 0.5 mn 1.5 o 4 ), PVDF, KS-6, dissolved in NMP, and made into positive electrode slurry by mixing machine;

[0060] Lithium titanate (Li 4 Ti 5 0 12 ), PVDF, Ketjen black, dissolved in NMP, and made into negative electrode slurry by mixing machine;

[0061] Both the positive and negative electrode current collectors are made of aluminum foil, and the aforementioned positive and negative electrode slurry is uniformly coated on the aluminum foil through a coating machine and wound into a roll, and then baked and rolled to make positive and negative electrode sheets respectively;

[0062] After the po...

Embodiment 3

[0068] The positive active material includes: 86% lithium nickel manganese oxide (LiNi 0.5 mn 1.5 o 4 ), 6% PVDF, 5% SP, 3% KS-6;

[0069] The negative electrode active material includes: 86% lithium titanate (Li 4 Ti 5 0 12 ), 6% PVDF, 6% SP, 2% carbon

[0070] nanotube;

[0071] Above-mentioned lithium-ion battery preparation steps are as follows:

[0072] Lithium nickel manganese oxide (LiNi 0.5 mn 1.5 o 4 ), PVDF, SP, KS-6 are dissolved in NMP, and the positive electrode slurry is made into a positive electrode slurry through a mixing machine;

[0073] Lithium titanate (Li 4 Ti 5 0 12 ), PVDF, SP, carbon nanotubes, dissolved in NMP, and made into negative electrode slurry by mixing machine;

[0074] Both the positive and negative electrode current collectors are made of aluminum foil, and the aforementioned positive and negative electrode slurry is uniformly coated on the aluminum foil through a coating machine and wound into a roll, and then baked and rolled...

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Abstract

The invention discloses a lithium-ion power battery. The battery comprises a positive plate, a negative plate, a diaphragm, a high-voltage-resistant electrolytic solution and a housing, wherein the positive plate comprises coiled aluminum foil; a positive active material, namely a LiNi0.5Mn1.5O4 material with a spinel-like crystal structure, is uniformly coated on the surface of the aluminum foil; the negative plate comprises coiled aluminum foil; a negative active material, namely a Li4Ti5O12 material with a spinel crystal structure, is uniformly coated on the surface of the aluminum foil; and the positive plate, the negative plate, the diaphragm and the high-voltage-resistant electrolytic solution constitute a battery cell with a discharge potential of 2.5V-3.5V. The invention also discloses a quick charging electric automobile which takes the lithium-ion power battery as a power source.

Description

technical field [0001] The invention relates to the field of lithium-ion batteries, in particular to a lithium-ion power battery with long service life, fast charging and discharging, good safety and a fast-charging electric vehicle using the battery. Background technique [0002] Currently used cathode materials for lithium-ion power batteries, such as LiMn 2 o 4 、LiCoNiMnO 2 、LiFePO 4 Lithium-ion batteries are traditionally combined with negative electrode carbon materials, which have a short service life, only 500-2000 charge and discharge times, and poor rapid charge and discharge capabilities. Lithium-ion batteries based on lithium titanate and lithium nickel-cobaltate contain heavy metal cobalt, which has certain toxicity and high price. Lithium nickel cobalt oxide is currently mainly used in digital batteries such as mobile phones, and the safety of power batteries is not good. [0003] There are still some disadvantages in the application of lithium batteries...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/485H01M4/62H01M10/0525
CPCY02E60/10
Inventor 朱德金满玉杰张学花刘子敬田刚韩勇张磊华马骏
Owner 山东同大新能源有限公司
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