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Manufacturing method of high power type lithium battery system

A manufacturing method and high-power technology, applied in the direction of electrolytic storage battery manufacturing, final product manufacturing, sustainable manufacturing/processing, etc., can solve the problem of capacity decay and cannot be discharged normally with high current, and overcome the problem of excessive large current discharge capacity decay, The effect of reducing the impedance and increasing the conduction rate

Inactive Publication Date: 2010-08-18
JIANGSU FRONT NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the existing battery system is applied to high-power equipment such as electric tools, the capacity decays too quickly and even cannot be discharged at a normal high current, which urgently requires improving the performance of high-current discharge of lithium batteries.

Method used

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  • Manufacturing method of high power type lithium battery system
  • Manufacturing method of high power type lithium battery system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Production of positive and negative electrode materials

[0025] Negative electrode material: power carbon powder accounts for 90% of the total weight, conductive agent SP is 2%, carbon fiber conductive material VGCF is 1.2%, thickener CMC is 1.8%, and water-based adhesive LA132 is 5%. Deionized water is about 50% of the total weight of the toner.

[0026] Positive electrode material: lithium manganate material accounts for about 89% of the total weight, conductive agent SP is 3.5%, conductive agent KS-15 is 3.5%, carbon fiber conductive material VGCF is 1%, binder PVDF (900) is 3%, The solvent NMP accounts for 52% of the total weight of the positive electrode material.

[0027] The positive electrode material is dried, and then the positive and negative electrode materials are uniformly stirred respectively.

[0028] Production process: ingredients→coating→baking→sheet making→spot welding→winding→one pack→liquid injection→formation→two seals→aging→volume separation→P...

Embodiment 2

[0036] Production of positive and negative electrode materials

[0037] Negative electrode material: power carbon powder accounts for 86% of the total weight, conductive agent SP is 4%, carbon fiber conductive material VGCF is 1.5%, thickener CMC is 3%, and water-based adhesive LA132 is 5.5%. Deionized water is about 55% of the total weight of the toner.

[0038] Positive electrode material: lithium manganate material accounts for about 86% of the total weight, conductive agent SP is 4%, conductive agent KS-15 is 5%, carbon fiber conductive material VGCF is about 3%, binder PVDF (900) is 2% , the solvent NMP accounts for 58% of the total weight of the positive electrode material of the battery.

[0039] The positive electrode material is dried, and then the positive and negative electrode materials are uniformly stirred respectively.

[0040] Production process: ingredients→coating→baking→sheet making→spot welding→winding→one pack→liquid injection→formation→two seals→aging→v...

Embodiment 3

[0048] Production of positive and negative electrode materials

[0049] Negative electrode material: power carbon powder accounts for 81% of the total weight, conductive agent SP accounts for 14.5%, carbon fiber conductive material VGCF accounts for 0.5%, thickener CMC accounts for 0.5%, and water-based adhesive LA132 accounts for 3.5%. Deionized water is about 65% of the total weight of the toner

[0050] Positive electrode material: lithium manganate material accounts for about 88% of the total weight, conductive agent SP is 5%, conductive agent KS-15 is 0.5%, carbon fiber conductive material VGCF is about 3%, binder PVDF (900) is 3.5% . The solvent NMP accounts for 62% of the total weight of the positive electrode material.

[0051] The positive electrode material is dried, and then the positive and negative electrode materials are uniformly stirred respectively.

[0052] Production process: ingredients→coating→baking→sheet making→spot welding→winding→one pack→liquid inj...

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Abstract

The invention relates to a manufacturing method of a high power type lithium battery system, which is characterized by selecting proper material formulas of the positive electrode and the negative electrode of a lithium ion battery, winding an electronic core for 4-5 layers in the manufacturing process and selecting a diaphragm of 9-20mu m between the positive electrode and the negative electrode, 'I'-shaped aluminum sheets or aluminum alloys and 'U'-shaped aluminum sheets or aluminum alloys are used for tightly packing more than two single batteries in the single battery assembling process. The invention achieves the purposes of further improving the conductivity of the battery and reducing the internal resistance, thereby reducing the generation of the heat of the lithium ion battery under the same conditions, basically lowering the temperature of the battery in large-current working process, and ensuring that the system of the invention works safely, reliably and efficiently under the condition of high-rate discharge.

Description

technical field [0001] The invention relates to a manufacturing method of a high-power lithium-ion battery system. The method greatly reduces the internal resistance of the battery, and at the same time, a cooling device is designed in the system, thereby achieving the purpose of making the whole system stable and reliable for high-rate discharge . Background technique [0002] At present, most small-capacity lithium batteries are used in energy storage electronic products such as mobile phones and MP3s, or are applied to electric vehicle systems by increasing the design capacity of batteries. With the improvement of technology and the expansion of application fields, lithium-ion Batteries are also gradually used in electric tools (such as lawn mowers, electric drills, electric toys, etc.). However, when the existing battery system is applied to high-power equipment such as electric tools, the capacity decays too quickly and even cannot be discharged at a normal high curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058
CPCY02E60/10Y02P70/50
Inventor 李恩国
Owner JIANGSU FRONT NEW ENERGY
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