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Novel graphitization method of lithium ion battery graphite negative electrode material

A lithium-ion battery and graphite negative electrode technology, applied in battery electrodes, chemical instruments and methods, circuits, etc., can solve problems such as increased quality control risks, inability to comprehensively utilize, increase outsourcing freight costs, etc., and achieve high density and volume density Increase, heat preservation effect is good

Pending Publication Date: 2022-05-10
青岛瀚博电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, there are not many domestic anode processing factories that have their own Acheson furnace for graphitization treatment. Most of them entrust external companies to process, which is costly, increases the freight cost of outsourcing, and increases quality control risks, so it cannot be comprehensively utilized. , forming a complete industrial chain, the graphitization process is the key link in the production of lithium battery negative electrode materials, and the quality control of the production process is directly related to the application performance of negative electrode materials

Method used

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  • Novel graphitization method of lithium ion battery graphite negative electrode material
  • Novel graphitization method of lithium ion battery graphite negative electrode material
  • Novel graphitization method of lithium ion battery graphite negative electrode material

Examples

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Embodiment 1

[0058] This embodiment is a new graphitization method with energy saving, low carbon, high efficiency and low cost for graphite negative electrode material of lithium ion battery, which specifically includes the following steps:

[0059] (1) Preparation of graphite negative electrode block requiring graphitization (making graphite negative electrode precursor into block precursor):

[0060] Mix 30 tons of graphite cathode precursor to be graphitized with 3 tons of asphalt (softening point 90 ~ 94 ℃, residual carbon 55%);

[0061] The mixed materials are molded with a molding machine. The molding shape is a cuboid and the molding size is 350mm * 350mm * 150mm.

[0062] Mark the model and batch on the upper right corner of each surface of the block with a code printer. The model and batch used this time is sc331ah1101.

[0063] (2) Design charging mode:

[0064] The situation of silicon carbide smelting furnace in the implementation process is described as follows:

[0065] Transforme...

Embodiment 2

[0093] This embodiment is a new graphitization method with energy saving, low carbon, high efficiency and low cost for graphite negative electrode material of lithium ion battery, which specifically includes the following steps:

[0094] (1) Preparation of graphite negative electrode block requiring graphitization:

[0095] 30 tons of graphitized graphite negative electrode precursor shall be kneaded with 3 tons of asphalt (softening point 90-94 ℃, residual carbon 55%);

[0096] The kneaded material is extruded by extrusion molding equipment. The molding shape is a cylinder and the size of the molding block is φ 600mm*1000mm。

[0097] Mark the model and batch on the upper right corner of each surface of the block with a code printer. The model and batch used this time is sc331ah1106.

[0098] (2) Design charging mode:

[0099] The situation of silicon carbide smelting furnace in the implementation process is described as follows:

[0100] Transformer: 8000kVA

[0101] Maximum curr...

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Abstract

The invention discloses a novel graphitization method for a graphite negative electrode material of a lithium ion battery. The novel graphitization method comprises the following steps: preparing a graphite negative electrode precursor into a blocky precursor; a plurality of blocky precursors are placed in a conductive section area in a smelting furnace from the furnace head to the furnace tail of the smelting furnace; a resistance material is added between the adjacent blocky precursors to serve as a drainage layer, and a heat preservation material is laid on the periphery of the conductive section area to form a heat preservation layer; power is supplied to the smelting furnace for heating, so that the blocky precursor is subjected to graphitization transformation; and after graphitization transformation, cooling and discharging. After the graphite negative electrode precursor is pressed and formed, the distance between material particles is small, the density is high, heat conduction is fast, the charging amount is high, the heat preservation effect is good, the performance of a graphitized product is high, the cost is only half of the cost of the same industry, and the method is a novel energy-saving, low-carbon, efficient and low-cost graphitization method.

Description

technical field [0001] The invention relates to the technical field of lithium ion battery, in particular to a new graphitization method of graphite negative electrode material of lithium ion battery with energy saving, low carbon and high efficiency. Background technology [0002] The end market applications of lithium-ion batteries are consumer electronic products, power battery market and energy storage battery market. As a kind of lithium battery consumables, the shipment of negative electrode materials is also growing rapidly with the continuous improvement of the output of lithium-ion batteries. According to the main objectives and requirements of the development plan for energy saving and new energy vehicle industry (2012-2020) (hereinafter referred to as the "industrial development plan") issued by the State Council, by 2020, the production capacity of pure electric vehicles and plug-in hybrid vehicles will reach 2 million and the cumulative production and sales volume wi...

Claims

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Application Information

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IPC IPC(8): C01B32/205C04B35/52H01M4/587
CPCC01B32/205C04B35/522H01M4/587C01P2006/12C01P2006/40
Inventor 刘成全王金枝刘金婷齐昕
Owner 青岛瀚博电子科技有限公司
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