Lithium ion power cell

A power battery, lithium ion technology, applied in battery electrodes, secondary batteries, battery pack components, etc., can solve the problems of high power, high energy, low active material specific efficiency, low weight specific energy, etc. The effect of wide operating temperature range, long storage life and high safety performance

Active Publication Date: 2008-07-23
BTR NEW MATERIAL GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Starting from grid materials and battery structures, countries around the world have successively invented some new grid materials, such as copper expanded mesh grids, lead cloth, etc., whose weight specific energy can be increased to 50Wh / kg. These research results will lead-acid batteries The performance is pushed forward, but the growth rate is limited, and it cannot meet the requirements of high power and high energy
Moreover, there are many shortcomings in the lead-acid battery itself, especially the large volume, heavy weight, and low specific efficiency of active materials.
Low weight to energy (average 30-40Wh / kg) is its biggest shortcoming and shortcoming

Method used

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Examples

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Effect test

Embodiment 1

[0033] Example 1: 13 μm Li 4 Ti 5 o 12 , acetylene black, and polyvinylidene fluoride dissolved in N-methylpyrrolidone were put into a mixer according to a mass ratio of 90:5:5, and stirred at 150 rpm for 12 hours to obtain the required negative electrode slurry. Put the negative electrode slurry on a pulper, coat it on a 10μm copper foil, bake it at 130°C for 6 hours, roll it under a pressure of 20MPa, cut it according to a certain size of 270mm×42.5mm, and make it into a surface density 230g / cm 2 the negative pole piece. 13 μm Li 3 V 2 (PO 4 ) 3 , acetylene black, and polyvinylidene fluoride dissolved in N-methylpyrrolidone were put into a mixer according to a mass ratio of 88:7:5, and stirred at 100 rpm for 24 hours. Put the positive electrode slurry on a pulper, coat it on a 15μm aluminum foil, bake it at 150°C for 6 hours, roll it under a pressure of 25MPa, cut it according to a certain size of 320mm×41.5mm, and make a surface density of 210g / cm 2positive pole p...

Embodiment 2

[0036] Example 2: 35 μm Li 4 Ti 5 o 12 , acetylene black and polyvinylidene fluoride dissolved in N-methylpyrrolidone were put into the mixer according to the mass ratio of 93:5:2, and stirred at 50 rpm for 24 hours to obtain the required negative electrode slurry. Put the negative electrode slurry on a pulper, coat it on a 20μm copper foil, and bake it at 100°C for 12 hours, at 10MPa / M 2 Rolling under a certain pressure, cut according to a certain size of 270mm×42.5mm, and made into a surface density of 230g / cm 2 the negative pole piece. 35 μm Li 3 V 2 (PO 4 ) 3 , acetylene black, and polyvinylidene fluoride dissolved in N-methylpyrrolidone were put into a mixer according to the ratio of 90:7:3, and stirred at 80 rpm for 24 hours. Put the positive electrode slurry on a pulper, coat it on a 12μm aluminum foil, bake it at 120°C for 12 hours, roll it under a pressure of 25MPa, cut it according to a certain size of 320mm×41.5mm, and make a surface density of 210g / cm 2 p...

Embodiment 3

[0039] Example 3: 25 μm Li 4 Ti 5 o 12 , conductive graphite and polytetrafluoroethylene aqueous solution were put into the mixer according to the mass ratio of 91:4:5, and stirred at 50 rpm for 24 hours to obtain the required negative electrode slurry. Put the negative electrode slurry on a pulper, coat it on a 20μm copper foil, and bake it at 100°C for 12 hours, at 10MPa / M 2 Rolling under a certain pressure, cut according to a certain size of 270mm×42.5mm, and made into a surface density of 230g / cm 2 the negative pole piece. 25 μm Li 3 V 2 (PO 4 ) 3 , conductive graphite and polytetrafluoroethylene aqueous solution were put into the mixer according to the ratio of 89:6:5, and stirred at 80 rpm for 24 hours. Put the positive electrode slurry on a pulper, coat it on a 12μm aluminum foil, bake it at 120°C for 12 hours, roll it under a pressure of 25MPa, cut it according to a certain size of 320mm×41.5mm, and make a surface density of 210g / cm 2 positive pole piece. Th...

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Abstract

The invention discloses a lithium ion power battery, which solves the technical problem to improve proportion by weight capacity of the power battery and protect environment. The lithium ion power battery of the invention is provided with a battery shell, a cathode, an anode, electrolyte and a membrane, wherein the cathode contains lithium titanate active compound which is 90%-93% by mass ratio of the cathode materials, the anode contains phosphoric acid vanadium lithium active compound which is 88%-90% by mass ratio of the anode materials, the electrolyte contains at least one of mixed organic solvents which are ethylene carbonate ester, propylene carbonate, dimethyl carbonate, diethyl carbonate, dimethyl ether and methyl ethyl carbonate. Compared with the prior art, the battery of the invention has the advantages of higher safety property, good multiplying power property and recirculation property, long cycle life and extensive range of use temperature, and being capable of replacing a lead-acid storage battery which is widely used at present.

Description

technical field [0001] The invention relates to a battery, in particular to a lithium ion power battery. Background technique [0002] With the development of science and technology and social progress, the human demand for energy is increasing. Traditional power batteries, mainly lead-acid batteries, play an important role in human life. With its excellent performance and cost advantages, lead-acid batteries dominate the world's battery industry. In electric vehicles, hybrid vehicles, wind power, solar cells, and electric batteries, lead-acid batteries are still listed as the preferred power source. Traditional lead-acid batteries are low in cost, simple to manufacture, and have high volume specific energy and mass specific capacity. Starting from grid materials and battery structures, countries around the world have successively invented some new grid materials, such as copper expanded mesh grids, lead cloth, etc., whose weight specific energy can be increased to 50Wh / kg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/40H01M4/58H01M4/48H01M4/02H01M4/66H01M4/62H01M2/16H01M2/02H01M4/485H01M10/0525H01M10/0569H01M50/119H01M50/121H01M50/417
CPCY02E60/10
Inventor 岳敏陈敬波钟志强贺雪琴张万红
Owner BTR NEW MATERIAL GRP CO LTD
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