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Quick charging lithium-ion battery

A lithium-ion battery, fast charging technology, applied to battery electrodes, secondary batteries, circuits, etc., can solve the problems of long charging cycle, environmental pollution, etc., and achieve the effects of smooth surface, high electrochemical activity, and favorable cycle performance

Active Publication Date: 2016-04-13
XIAN SAFTY ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Lithium-ion batteries have been widely used, especially in digital products, portable mobile terminals, energy storage fields, electric vehicles, etc. With the upgrading of digital products and smart terminals, power consumption has also increased. Under normal circumstances, the smart mobile device is fully charged for about 2h~4h. On the other hand, with the popularization of cars, the problem of environmental pollution has become more and more prominent. The country has begun to vigorously promote electric vehicles. Due to the constraints of the current battery system, the charging time of electric vehicles is generally 6h. ~10h, the charging cycle is too long, which brings a lot of inconvenience, so how to shorten the charging time of lithium batteries has become an urgent problem to be solved for the widespread use of lithium batteries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of modified graphite:

[0029] Step 1: Melt the asphalt powder under the protection of nitrogen atmosphere, and then spin the melted asphalt powder centrifugal spinning under the action of a 1.5T magnetic field to obtain asphalt filaments; the melting temperature is 400°C;

[0030] Step 2. Cut the pitch thread described in Step 1 into pitch particles with a length of 20 μm, and then carbonize the pitch particles under the protection of a nitrogen atmosphere to obtain primary particle carbon fibers; the temperature of the carbonization treatment is 1000°C, The carbonization treatment time is 8h;

[0031] Step 3. Heat the phenolic resin powder at 400°C for 5.5 hours, then heat up to 600°C in a nitrogen atmosphere, then change the nitrogen atmosphere to carbon dioxide, heat and activate for 40 minutes, and get activated phenolic resin after natural cooling;

[0032] Step 4. Mix the phenolic resin particles, the primary particle carbon fibers described in step 2 and the...

Embodiment 2

[0035] Preparation of modified graphite:

[0036] Step 1: Melt the asphalt powder under the protection of nitrogen atmosphere, and then spin the melted asphalt powder centrifugal spinning under the action of a 1T magnetic field to obtain asphalt filaments; the melting temperature is 300°C;

[0037] Step 2. Cut the pitch thread described in Step 1 into pitch particles with a length of 30 μm, and then carbonize the pitch particles under the protection of a nitrogen atmosphere to obtain primary particle carbon fibers; the temperature of the carbonization treatment is 1100°C, The carbonization treatment time is 7h;

[0038] Step 3. Heat the phenolic resin powder at 500°C for 5 hours, then heat up to 600°C in a nitrogen atmosphere, then change the nitrogen atmosphere to carbon dioxide, heat and activate for 60 minutes, and obtain an activated phenolic resin after natural cooling;

[0039] Step 4. Mix the phenolic resin particles, the primary particle carbon fibers described in step 2 and t...

Embodiment 3

[0042] Preparation of modified graphite:

[0043] Step 1: Melt the asphalt powder under the protection of nitrogen atmosphere, and then spin the melted asphalt powder centrifugally under the action of a 1.2T magnetic field to obtain asphalt filaments; the melting temperature is 500°C;

[0044] Step 2. Cut the pitch thread described in Step 1 into pitch particles with a length of 5 μm, and then carbonize the pitch particles under the protection of a nitrogen atmosphere to obtain primary particle carbon fibers; the temperature of the carbonization treatment is 1200°C, The carbonization treatment time is 6h;

[0045] Step 3. Heat the phenolic resin powder at 300°C for 6 hours, then heat up to 600°C in a nitrogen atmosphere, then change the nitrogen atmosphere to carbon dioxide, heat and activate for 30 minutes, and obtain activated phenolic resin after natural cooling;

[0046] Step 4. Mix the phenolic resin particles, the primary particle carbon fiber described in step 2 and the activat...

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Abstract

The invention discloses a quick charging lithium-ion battery, which comprises a positive plate, a negative plate, a diaphragm, an electrolyte, a positive tab, a negative tab and a package shell, wherein the negative plate is prepared by coating two surfaces of copper foil with a negative paste containing a negative active material; and the negative active material is modified graphite of which the mean particle size D<50> is 3microns to 20microns. The lithium-ion battery disclosed by the invention can be used at super high rate, and has 30C continuous charging capability; the charging capacity can reach over 95% of 1C low-current charging capacity; over 90% of battery capacity can be charged for 2 minutes at 30C; quick charging can be achieved; and the charge capacity retention ratio is over 97.31% through charging at 30C and 100 discharge cycles at 1C.

Description

Technical field [0001] The invention belongs to the technical field of lithium ion batteries, and specifically relates to a lithium ion battery for rapid charging. Background technique [0002] Lithium-ion batteries have been widely used, especially in digital products, portable mobile terminals, energy storage fields, electric vehicles, etc. With the upgrade of digital products and smart terminals, power consumption has also increased. Under the circumstances, the smart mobile device is fully charged for about 2h to 4h. On the other hand, with the popularization of automobiles, the environmental pollution problem has become more and more prominent. The country has begun to vigorously promote electric vehicles. Due to the current battery system constraints, the charging time of electric vehicles is generally 6h ~10h, the charging cycle is too long, which brings a lot of inconvenience, so how to shorten the charging time of lithium batteries has become an urgent problem to be solv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/587H01M10/0525
CPCH01M4/366H01M4/587H01M10/0525Y02E60/10
Inventor 喻军峰姚宏亮谭晓兰杨洪何显峰
Owner XIAN SAFTY ENERGY TECH
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