160ah lithium iron phosphate square battery and its manufacturing process

A 160AH, 1.160AH technology, applied in electrolyte battery manufacturing, battery electrodes, sustainable manufacturing/processing, etc., can solve problems such as difficult processing, low bulk density and tap density, poor conductivity and ion diffusion performance of LiFePO4 , to achieve the effect of low cost, safe use, reducing interface impedance and battery internal resistance

Inactive Publication Date: 2011-12-28
青岛海霸能源集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although lithium iron phosphate power battery has a series of incomparable advantages of other materials, it also has some shortcomings, mainly in: 1. Pure LiFePO 4 Poor electrical conductivity and ion diffusion properties
2. LiFePO 4 The bulk density and tap density are relatively low, and it is not easy to process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The manufacturing process of 160AH lithium iron phosphate square battery includes the following steps: (1) ingredients, (2) coating, (3) baking, (4) rolling, (5) battery pole piece production, (6) lamination Operation, (7) battery assembly, (8) heat sealing, (9) liquid injection, (10) formation, (11) volume separation;

[0040] (1) Ingredients:

[0041] Prepare the positive electrode slurry with water as the medium. The required materials are: 3% water-based glue, 92% lithium iron phosphate, 2% superconducting carbon black, 2% conductive graphite, and 1% lithium salt. Stir and dilute, add superconducting carbon black and conductive graphite and stir, and finally add lithium iron phosphate and lithium salt and stir to form a slurry.

[0042] Prepare the negative electrode slurry with water as the medium. The required materials are: 91% graphite, 3% sodium carboxymethyl cellulose, 2% superconducting carbon black, 4% styrene-butadiene rubber; add sodium carboxymethyl cell...

Embodiment 2

[0073] The manufacturing process of the 160AH lithium iron phosphate square battery includes the following steps that are different from those in Example 1:

[0074] (1) Ingredients:

[0075] Prepare the positive electrode slurry with water as the medium. The required materials are: 4% water-based glue, 92% lithium iron phosphate, 1.5% superconducting carbon black, 2% conductive graphite, and 0.5% lithium salt. Stir and dilute, add superconducting carbon black and conductive graphite and stir, and finally add lithium iron phosphate and lithium salt and stir to form a slurry.

[0076] Prepare the negative electrode slurry with water as the medium. The required materials are: 96% graphite, 1% sodium carboxymethyl cellulose, 1% superconducting carbon black, 2% styrene-butadiene rubber; add sodium carboxymethyl cellulose to water Stir, after standing for precipitation, add superconducting carbon black and graphite and stir, and finally add styrene-butadiene rubber and stir to for...

Embodiment 3

[0084] The manufacturing process of the 160AH lithium iron phosphate square battery includes the following steps that are different from those in Example 1 and Example 2:

[0085] (1) Ingredients:

[0086] Prepare the positive electrode slurry with water as the medium. The required materials are: 5.5% water-based glue, 90% lithium iron phosphate, 2.5% superconducting carbon black, 1.5% conductive graphite, and 0.5% lithium salt. Stir and dilute, add superconducting carbon black and conductive graphite and stir, and finally add lithium iron phosphate and lithium salt and stir to form a slurry.

[0087] Prepare the negative electrode slurry with water as the medium. The required materials are: 94% graphite, 2% sodium carboxymethyl cellulose, 1% superconducting carbon black, 3% styrene-butadiene rubber; add sodium carboxymethyl cellulose to water Stir, after standing for precipitation, add superconducting carbon black and graphite and stir, and finally add styrene-butadiene rubb...

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PUM

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Abstract

The invention discloses a 160AH lithium iron phosphate square battery and its manufacturing process. The process includes the following steps: (1) batching, (2) coating, (3) baking, (4) rolling, (5) battery electrodes sheet production, (6) lamination operation, (7) battery assembly, (8) heat sealing, (9) liquid injection, (10) chemical formation, (11) volume separation. Among them, in (1) the positive and negative electrode slurries are formulated with water-based glue, which will not produce any pollution and is a completely environmentally friendly formula. The prepared positive and negative electrode slurries have no solvent release, meet environmental requirements, have low cost and are safe to use. Compared with oil-based systems, the pole pieces of water-based systems are softer and can withstand multiple windings.

Description

technical field [0001] The invention relates to a lithium iron phosphate battery and a manufacturing process thereof. Background technique [0002] Energy crisis, resource shortage, and environmental pollution are the three severe challenges facing human existence. Finding clean, renewable, and resource-saving secondary resources is an important task to be solved for the sustainable development of human society. [0003] With the development of the economy and the improvement of people's living standards, people's demand for batteries with high energy density is becoming more and more intense. Lithium-ion batteries have the advantages of high working voltage, high energy density, long cycle life, small self-discharge rate, and environmental protection. , has become the development trend of secondary batteries. It has been widely used in portable electrical appliances such as wireless communication and digital cameras, and is gradually being widely used in special fields...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M4/62
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 王波逄高峰
Owner 青岛海霸能源集团有限公司
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